From b35250c0816c7cf7d0a8de92f5fafb6a7508a708 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Wed, 10 Jun 2020 17:36:03 +0200
Subject: [PATCH 0001/1341] writeback: Protect inode->i_io_list with
 inode->i_lock

Currently, operations on inode->i_io_list are protected by
wb->list_lock. In the following patches we'll need to maintain
consistency between inode->i_state and inode->i_io_list so change the
code so that inode->i_lock protects also all inode's i_io_list handling.

Reviewed-by: Martijn Coenen <maco@android.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
CC: stable@vger.kernel.org # Prerequisite for "writeback: Avoid skipping inode writeback"
Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/fs-writeback.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index a605c3dddabc7..ff0b18331590b 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -144,6 +144,7 @@ static void inode_io_list_del_locked(struct inode *inode,
 				     struct bdi_writeback *wb)
 {
 	assert_spin_locked(&wb->list_lock);
+	assert_spin_locked(&inode->i_lock);
 
 	list_del_init(&inode->i_io_list);
 	wb_io_lists_depopulated(wb);
@@ -1122,7 +1123,9 @@ void inode_io_list_del(struct inode *inode)
 	struct bdi_writeback *wb;
 
 	wb = inode_to_wb_and_lock_list(inode);
+	spin_lock(&inode->i_lock);
 	inode_io_list_del_locked(inode, wb);
+	spin_unlock(&inode->i_lock);
 	spin_unlock(&wb->list_lock);
 }
 EXPORT_SYMBOL(inode_io_list_del);
@@ -1172,8 +1175,10 @@ void sb_clear_inode_writeback(struct inode *inode)
  * the case then the inode must have been redirtied while it was being written
  * out and we don't reset its dirtied_when.
  */
-static void redirty_tail(struct inode *inode, struct bdi_writeback *wb)
+static void redirty_tail_locked(struct inode *inode, struct bdi_writeback *wb)
 {
+	assert_spin_locked(&inode->i_lock);
+
 	if (!list_empty(&wb->b_dirty)) {
 		struct inode *tail;
 
@@ -1184,6 +1189,13 @@ static void redirty_tail(struct inode *inode, struct bdi_writeback *wb)
 	inode_io_list_move_locked(inode, wb, &wb->b_dirty);
 }
 
+static void redirty_tail(struct inode *inode, struct bdi_writeback *wb)
+{
+	spin_lock(&inode->i_lock);
+	redirty_tail_locked(inode, wb);
+	spin_unlock(&inode->i_lock);
+}
+
 /*
  * requeue inode for re-scanning after bdi->b_io list is exhausted.
  */
@@ -1394,7 +1406,7 @@ static void requeue_inode(struct inode *inode, struct bdi_writeback *wb,
 		 * writeback is not making progress due to locked
 		 * buffers. Skip this inode for now.
 		 */
-		redirty_tail(inode, wb);
+		redirty_tail_locked(inode, wb);
 		return;
 	}
 
@@ -1414,7 +1426,7 @@ static void requeue_inode(struct inode *inode, struct bdi_writeback *wb,
 			 * retrying writeback of the dirty page/inode
 			 * that cannot be performed immediately.
 			 */
-			redirty_tail(inode, wb);
+			redirty_tail_locked(inode, wb);
 		}
 	} else if (inode->i_state & I_DIRTY) {
 		/*
@@ -1422,7 +1434,7 @@ static void requeue_inode(struct inode *inode, struct bdi_writeback *wb,
 		 * such as delayed allocation during submission or metadata
 		 * updates after data IO completion.
 		 */
-		redirty_tail(inode, wb);
+		redirty_tail_locked(inode, wb);
 	} else if (inode->i_state & I_DIRTY_TIME) {
 		inode->dirtied_when = jiffies;
 		inode_io_list_move_locked(inode, wb, &wb->b_dirty_time);
@@ -1669,8 +1681,8 @@ static long writeback_sb_inodes(struct super_block *sb,
 		 */
 		spin_lock(&inode->i_lock);
 		if (inode->i_state & (I_NEW | I_FREEING | I_WILL_FREE)) {
+			redirty_tail_locked(inode, wb);
 			spin_unlock(&inode->i_lock);
-			redirty_tail(inode, wb);
 			continue;
 		}
 		if ((inode->i_state & I_SYNC) && wbc.sync_mode != WB_SYNC_ALL) {
-- 
GitLab


From 5afced3bf28100d81fb2fe7e98918632a08feaf5 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Fri, 29 May 2020 15:05:22 +0200
Subject: [PATCH 0002/1341] writeback: Avoid skipping inode writeback

Inode's i_io_list list head is used to attach inode to several different
lists - wb->{b_dirty, b_dirty_time, b_io, b_more_io}. When flush worker
prepares a list of inodes to writeback e.g. for sync(2), it moves inodes
to b_io list. Thus it is critical for sync(2) data integrity guarantees
that inode is not requeued to any other writeback list when inode is
queued for processing by flush worker. That's the reason why
writeback_single_inode() does not touch i_io_list (unless the inode is
completely clean) and why __mark_inode_dirty() does not touch i_io_list
if I_SYNC flag is set.

However there are two flaws in the current logic:

1) When inode has only I_DIRTY_TIME set but it is already queued in b_io
list due to sync(2), concurrent __mark_inode_dirty(inode, I_DIRTY_SYNC)
can still move inode back to b_dirty list resulting in skipping
writeback of inode time stamps during sync(2).

2) When inode is on b_dirty_time list and writeback_single_inode() races
with __mark_inode_dirty() like:

writeback_single_inode()		__mark_inode_dirty(inode, I_DIRTY_PAGES)
  inode->i_state |= I_SYNC
  __writeback_single_inode()
					  inode->i_state |= I_DIRTY_PAGES;
					  if (inode->i_state & I_SYNC)
					    bail
  if (!(inode->i_state & I_DIRTY_ALL))
  - not true so nothing done

We end up with I_DIRTY_PAGES inode on b_dirty_time list and thus
standard background writeback will not writeback this inode leading to
possible dirty throttling stalls etc. (thanks to Martijn Coenen for this
analysis).

Fix these problems by tracking whether inode is queued in b_io or
b_more_io lists in a new I_SYNC_QUEUED flag. When this flag is set, we
know flush worker has queued inode and we should not touch i_io_list.
On the other hand we also know that once flush worker is done with the
inode it will requeue the inode to appropriate dirty list. When
I_SYNC_QUEUED is not set, __mark_inode_dirty() can (and must) move inode
to appropriate dirty list.

Reported-by: Martijn Coenen <maco@android.com>
Reviewed-by: Martijn Coenen <maco@android.com>
Tested-by: Martijn Coenen <maco@android.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Fixes: 0ae45f63d4ef ("vfs: add support for a lazytime mount option")
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/fs-writeback.c  | 17 ++++++++++++-----
 include/linux/fs.h |  8 ++++++--
 2 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index ff0b18331590b..f470c10641c5c 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -146,6 +146,7 @@ static void inode_io_list_del_locked(struct inode *inode,
 	assert_spin_locked(&wb->list_lock);
 	assert_spin_locked(&inode->i_lock);
 
+	inode->i_state &= ~I_SYNC_QUEUED;
 	list_del_init(&inode->i_io_list);
 	wb_io_lists_depopulated(wb);
 }
@@ -1187,6 +1188,7 @@ static void redirty_tail_locked(struct inode *inode, struct bdi_writeback *wb)
 			inode->dirtied_when = jiffies;
 	}
 	inode_io_list_move_locked(inode, wb, &wb->b_dirty);
+	inode->i_state &= ~I_SYNC_QUEUED;
 }
 
 static void redirty_tail(struct inode *inode, struct bdi_writeback *wb)
@@ -1262,8 +1264,11 @@ static int move_expired_inodes(struct list_head *delaying_queue,
 			break;
 		list_move(&inode->i_io_list, &tmp);
 		moved++;
+		spin_lock(&inode->i_lock);
 		if (flags & EXPIRE_DIRTY_ATIME)
-			set_bit(__I_DIRTY_TIME_EXPIRED, &inode->i_state);
+			inode->i_state |= I_DIRTY_TIME_EXPIRED;
+		inode->i_state |= I_SYNC_QUEUED;
+		spin_unlock(&inode->i_lock);
 		if (sb_is_blkdev_sb(inode->i_sb))
 			continue;
 		if (sb && sb != inode->i_sb)
@@ -1438,6 +1443,7 @@ static void requeue_inode(struct inode *inode, struct bdi_writeback *wb,
 	} else if (inode->i_state & I_DIRTY_TIME) {
 		inode->dirtied_when = jiffies;
 		inode_io_list_move_locked(inode, wb, &wb->b_dirty_time);
+		inode->i_state &= ~I_SYNC_QUEUED;
 	} else {
 		/* The inode is clean. Remove from writeback lists. */
 		inode_io_list_del_locked(inode, wb);
@@ -2301,11 +2307,12 @@ void __mark_inode_dirty(struct inode *inode, int flags)
 		inode->i_state |= flags;
 
 		/*
-		 * If the inode is being synced, just update its dirty state.
-		 * The unlocker will place the inode on the appropriate
-		 * superblock list, based upon its state.
+		 * If the inode is queued for writeback by flush worker, just
+		 * update its dirty state. Once the flush worker is done with
+		 * the inode it will place it on the appropriate superblock
+		 * list, based upon its state.
 		 */
-		if (inode->i_state & I_SYNC)
+		if (inode->i_state & I_SYNC_QUEUED)
 			goto out_unlock_inode;
 
 		/*
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 19ef6c88c152e..48556efcdcf06 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2157,6 +2157,10 @@ static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src,
  *
  * I_DONTCACHE		Evict inode as soon as it is not used anymore.
  *
+ * I_SYNC_QUEUED	Inode is queued in b_io or b_more_io writeback lists.
+ *			Used to detect that mark_inode_dirty() should not move
+ * 			inode between dirty lists.
+ *
  * Q: What is the difference between I_WILL_FREE and I_FREEING?
  */
 #define I_DIRTY_SYNC		(1 << 0)
@@ -2174,12 +2178,12 @@ static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src,
 #define I_DIO_WAKEUP		(1 << __I_DIO_WAKEUP)
 #define I_LINKABLE		(1 << 10)
 #define I_DIRTY_TIME		(1 << 11)
-#define __I_DIRTY_TIME_EXPIRED	12
-#define I_DIRTY_TIME_EXPIRED	(1 << __I_DIRTY_TIME_EXPIRED)
+#define I_DIRTY_TIME_EXPIRED	(1 << 12)
 #define I_WB_SWITCH		(1 << 13)
 #define I_OVL_INUSE		(1 << 14)
 #define I_CREATING		(1 << 15)
 #define I_DONTCACHE		(1 << 16)
+#define I_SYNC_QUEUED		(1 << 17)
 
 #define I_DIRTY_INODE (I_DIRTY_SYNC | I_DIRTY_DATASYNC)
 #define I_DIRTY (I_DIRTY_INODE | I_DIRTY_PAGES)
-- 
GitLab


From f9cae926f35e8230330f28c7b743ad088611a8de Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Fri, 29 May 2020 16:08:58 +0200
Subject: [PATCH 0003/1341] writeback: Fix sync livelock due to b_dirty_time
 processing

When we are processing writeback for sync(2), move_expired_inodes()
didn't set any inode expiry value (older_than_this). This can result in
writeback never completing if there's steady stream of inodes added to
b_dirty_time list as writeback rechecks dirty lists after each writeback
round whether there's more work to be done. Fix the problem by using
sync(2) start time is inode expiry value when processing b_dirty_time
list similarly as for ordinarily dirtied inodes. This requires some
refactoring of older_than_this handling which simplifies the code
noticeably as a bonus.

Fixes: 0ae45f63d4ef ("vfs: add support for a lazytime mount option")
CC: stable@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/fs-writeback.c                | 44 ++++++++++++--------------------
 include/trace/events/writeback.h | 13 +++++-----
 2 files changed, 23 insertions(+), 34 deletions(-)

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index f470c10641c5c..ae17d64a3e189 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -42,7 +42,6 @@
 struct wb_writeback_work {
 	long nr_pages;
 	struct super_block *sb;
-	unsigned long *older_than_this;
 	enum writeback_sync_modes sync_mode;
 	unsigned int tagged_writepages:1;
 	unsigned int for_kupdate:1;
@@ -1234,16 +1233,13 @@ static bool inode_dirtied_after(struct inode *inode, unsigned long t)
 #define EXPIRE_DIRTY_ATIME 0x0001
 
 /*
- * Move expired (dirtied before work->older_than_this) dirty inodes from
+ * Move expired (dirtied before dirtied_before) dirty inodes from
  * @delaying_queue to @dispatch_queue.
  */
 static int move_expired_inodes(struct list_head *delaying_queue,
 			       struct list_head *dispatch_queue,
-			       int flags,
-			       struct wb_writeback_work *work)
+			       int flags, unsigned long dirtied_before)
 {
-	unsigned long *older_than_this = NULL;
-	unsigned long expire_time;
 	LIST_HEAD(tmp);
 	struct list_head *pos, *node;
 	struct super_block *sb = NULL;
@@ -1251,16 +1247,9 @@ static int move_expired_inodes(struct list_head *delaying_queue,
 	int do_sb_sort = 0;
 	int moved = 0;
 
-	if ((flags & EXPIRE_DIRTY_ATIME) == 0)
-		older_than_this = work->older_than_this;
-	else if (!work->for_sync) {
-		expire_time = jiffies - (dirtytime_expire_interval * HZ);
-		older_than_this = &expire_time;
-	}
 	while (!list_empty(delaying_queue)) {
 		inode = wb_inode(delaying_queue->prev);
-		if (older_than_this &&
-		    inode_dirtied_after(inode, *older_than_this))
+		if (inode_dirtied_after(inode, dirtied_before))
 			break;
 		list_move(&inode->i_io_list, &tmp);
 		moved++;
@@ -1306,18 +1295,22 @@ static int move_expired_inodes(struct list_head *delaying_queue,
  *                                           |
  *                                           +--> dequeue for IO
  */
-static void queue_io(struct bdi_writeback *wb, struct wb_writeback_work *work)
+static void queue_io(struct bdi_writeback *wb, struct wb_writeback_work *work,
+		     unsigned long dirtied_before)
 {
 	int moved;
+	unsigned long time_expire_jif = dirtied_before;
 
 	assert_spin_locked(&wb->list_lock);
 	list_splice_init(&wb->b_more_io, &wb->b_io);
-	moved = move_expired_inodes(&wb->b_dirty, &wb->b_io, 0, work);
+	moved = move_expired_inodes(&wb->b_dirty, &wb->b_io, 0, dirtied_before);
+	if (!work->for_sync)
+		time_expire_jif = jiffies - dirtytime_expire_interval * HZ;
 	moved += move_expired_inodes(&wb->b_dirty_time, &wb->b_io,
-				     EXPIRE_DIRTY_ATIME, work);
+				     EXPIRE_DIRTY_ATIME, time_expire_jif);
 	if (moved)
 		wb_io_lists_populated(wb);
-	trace_writeback_queue_io(wb, work, moved);
+	trace_writeback_queue_io(wb, work, dirtied_before, moved);
 }
 
 static int write_inode(struct inode *inode, struct writeback_control *wbc)
@@ -1829,7 +1822,7 @@ static long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages,
 	blk_start_plug(&plug);
 	spin_lock(&wb->list_lock);
 	if (list_empty(&wb->b_io))
-		queue_io(wb, &work);
+		queue_io(wb, &work, jiffies);
 	__writeback_inodes_wb(wb, &work);
 	spin_unlock(&wb->list_lock);
 	blk_finish_plug(&plug);
@@ -1849,7 +1842,7 @@ static long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages,
  * takes longer than a dirty_writeback_interval interval, then leave a
  * one-second gap.
  *
- * older_than_this takes precedence over nr_to_write.  So we'll only write back
+ * dirtied_before takes precedence over nr_to_write.  So we'll only write back
  * all dirty pages if they are all attached to "old" mappings.
  */
 static long wb_writeback(struct bdi_writeback *wb,
@@ -1857,14 +1850,11 @@ static long wb_writeback(struct bdi_writeback *wb,
 {
 	unsigned long wb_start = jiffies;
 	long nr_pages = work->nr_pages;
-	unsigned long oldest_jif;
+	unsigned long dirtied_before = jiffies;
 	struct inode *inode;
 	long progress;
 	struct blk_plug plug;
 
-	oldest_jif = jiffies;
-	work->older_than_this = &oldest_jif;
-
 	blk_start_plug(&plug);
 	spin_lock(&wb->list_lock);
 	for (;;) {
@@ -1898,14 +1888,14 @@ static long wb_writeback(struct bdi_writeback *wb,
 		 * safe.
 		 */
 		if (work->for_kupdate) {
-			oldest_jif = jiffies -
+			dirtied_before = jiffies -
 				msecs_to_jiffies(dirty_expire_interval * 10);
 		} else if (work->for_background)
-			oldest_jif = jiffies;
+			dirtied_before = jiffies;
 
 		trace_writeback_start(wb, work);
 		if (list_empty(&wb->b_io))
-			queue_io(wb, work);
+			queue_io(wb, work, dirtied_before);
 		if (work->sb)
 			progress = writeback_sb_inodes(work->sb, wb, work);
 		else
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index 10f5d1fa73476..7565dcd596973 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -498,8 +498,9 @@ DEFINE_WBC_EVENT(wbc_writepage);
 TRACE_EVENT(writeback_queue_io,
 	TP_PROTO(struct bdi_writeback *wb,
 		 struct wb_writeback_work *work,
+		 unsigned long dirtied_before,
 		 int moved),
-	TP_ARGS(wb, work, moved),
+	TP_ARGS(wb, work, dirtied_before, moved),
 	TP_STRUCT__entry(
 		__array(char,		name, 32)
 		__field(unsigned long,	older)
@@ -509,19 +510,17 @@ TRACE_EVENT(writeback_queue_io,
 		__field(ino_t,		cgroup_ino)
 	),
 	TP_fast_assign(
-		unsigned long *older_than_this = work->older_than_this;
 		strscpy_pad(__entry->name, bdi_dev_name(wb->bdi), 32);
-		__entry->older	= older_than_this ?  *older_than_this : 0;
-		__entry->age	= older_than_this ?
-				  (jiffies - *older_than_this) * 1000 / HZ : -1;
+		__entry->older	= dirtied_before;
+		__entry->age	= (jiffies - dirtied_before) * 1000 / HZ;
 		__entry->moved	= moved;
 		__entry->reason	= work->reason;
 		__entry->cgroup_ino	= __trace_wb_assign_cgroup(wb);
 	),
 	TP_printk("bdi %s: older=%lu age=%ld enqueue=%d reason=%s cgroup_ino=%lu",
 		__entry->name,
-		__entry->older,	/* older_than_this in jiffies */
-		__entry->age,	/* older_than_this in relative milliseconds */
+		__entry->older,	/* dirtied_before in jiffies */
+		__entry->age,	/* dirtied_before in relative milliseconds */
 		__entry->moved,
 		__print_symbolic(__entry->reason, WB_WORK_REASON),
 		(unsigned long)__entry->cgroup_ino
-- 
GitLab


From 5fcd57505c002efc5823a7355e21f48dd02d5a51 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Fri, 29 May 2020 16:24:43 +0200
Subject: [PATCH 0004/1341] writeback: Drop I_DIRTY_TIME_EXPIRE

The only use of I_DIRTY_TIME_EXPIRE is to detect in
__writeback_single_inode() that inode got there because flush worker
decided it's time to writeback the dirty inode time stamps (either
because we are syncing or because of age). However we can detect this
directly in __writeback_single_inode() and there's no need for the
strange propagation with I_DIRTY_TIME_EXPIRE flag.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
---
 fs/ext4/inode.c                  |  2 +-
 fs/fs-writeback.c                | 28 +++++++++++-----------------
 fs/xfs/libxfs/xfs_trans_inode.c  |  4 ++--
 include/linux/fs.h               |  1 -
 include/trace/events/writeback.h |  1 -
 5 files changed, 14 insertions(+), 22 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 40ec5c7ef0d35..4db497f02ffbb 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4887,7 +4887,7 @@ static void __ext4_update_other_inode_time(struct super_block *sb,
 	    (inode->i_state & I_DIRTY_TIME)) {
 		struct ext4_inode_info	*ei = EXT4_I(inode);
 
-		inode->i_state &= ~(I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED);
+		inode->i_state &= ~I_DIRTY_TIME;
 		spin_unlock(&inode->i_lock);
 
 		spin_lock(&ei->i_raw_lock);
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index ae17d64a3e189..149227160ff0b 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1238,7 +1238,7 @@ static bool inode_dirtied_after(struct inode *inode, unsigned long t)
  */
 static int move_expired_inodes(struct list_head *delaying_queue,
 			       struct list_head *dispatch_queue,
-			       int flags, unsigned long dirtied_before)
+			       unsigned long dirtied_before)
 {
 	LIST_HEAD(tmp);
 	struct list_head *pos, *node;
@@ -1254,8 +1254,6 @@ static int move_expired_inodes(struct list_head *delaying_queue,
 		list_move(&inode->i_io_list, &tmp);
 		moved++;
 		spin_lock(&inode->i_lock);
-		if (flags & EXPIRE_DIRTY_ATIME)
-			inode->i_state |= I_DIRTY_TIME_EXPIRED;
 		inode->i_state |= I_SYNC_QUEUED;
 		spin_unlock(&inode->i_lock);
 		if (sb_is_blkdev_sb(inode->i_sb))
@@ -1303,11 +1301,11 @@ static void queue_io(struct bdi_writeback *wb, struct wb_writeback_work *work,
 
 	assert_spin_locked(&wb->list_lock);
 	list_splice_init(&wb->b_more_io, &wb->b_io);
-	moved = move_expired_inodes(&wb->b_dirty, &wb->b_io, 0, dirtied_before);
+	moved = move_expired_inodes(&wb->b_dirty, &wb->b_io, dirtied_before);
 	if (!work->for_sync)
 		time_expire_jif = jiffies - dirtytime_expire_interval * HZ;
 	moved += move_expired_inodes(&wb->b_dirty_time, &wb->b_io,
-				     EXPIRE_DIRTY_ATIME, time_expire_jif);
+				     time_expire_jif);
 	if (moved)
 		wb_io_lists_populated(wb);
 	trace_writeback_queue_io(wb, work, dirtied_before, moved);
@@ -1483,18 +1481,14 @@ __writeback_single_inode(struct inode *inode, struct writeback_control *wbc)
 	spin_lock(&inode->i_lock);
 
 	dirty = inode->i_state & I_DIRTY;
-	if (inode->i_state & I_DIRTY_TIME) {
-		if ((dirty & I_DIRTY_INODE) ||
-		    wbc->sync_mode == WB_SYNC_ALL ||
-		    unlikely(inode->i_state & I_DIRTY_TIME_EXPIRED) ||
-		    unlikely(time_after(jiffies,
-					(inode->dirtied_time_when +
-					 dirtytime_expire_interval * HZ)))) {
-			dirty |= I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED;
-			trace_writeback_lazytime(inode);
-		}
-	} else
-		inode->i_state &= ~I_DIRTY_TIME_EXPIRED;
+	if ((inode->i_state & I_DIRTY_TIME) &&
+	    ((dirty & I_DIRTY_INODE) ||
+	     wbc->sync_mode == WB_SYNC_ALL || wbc->for_sync ||
+	     time_after(jiffies, inode->dirtied_time_when +
+			dirtytime_expire_interval * HZ))) {
+		dirty |= I_DIRTY_TIME;
+		trace_writeback_lazytime(inode);
+	}
 	inode->i_state &= ~dirty;
 
 	/*
diff --git a/fs/xfs/libxfs/xfs_trans_inode.c b/fs/xfs/libxfs/xfs_trans_inode.c
index b5dfb66548422..1b4df6636944c 100644
--- a/fs/xfs/libxfs/xfs_trans_inode.c
+++ b/fs/xfs/libxfs/xfs_trans_inode.c
@@ -96,9 +96,9 @@ xfs_trans_log_inode(
 	 * to log the timestamps, or will clear already cleared fields in the
 	 * worst case.
 	 */
-	if (inode->i_state & (I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED)) {
+	if (inode->i_state & I_DIRTY_TIME) {
 		spin_lock(&inode->i_lock);
-		inode->i_state &= ~(I_DIRTY_TIME | I_DIRTY_TIME_EXPIRED);
+		inode->i_state &= ~I_DIRTY_TIME;
 		spin_unlock(&inode->i_lock);
 	}
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 48556efcdcf06..45eadf5bea5d7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2178,7 +2178,6 @@ static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src,
 #define I_DIO_WAKEUP		(1 << __I_DIO_WAKEUP)
 #define I_LINKABLE		(1 << 10)
 #define I_DIRTY_TIME		(1 << 11)
-#define I_DIRTY_TIME_EXPIRED	(1 << 12)
 #define I_WB_SWITCH		(1 << 13)
 #define I_OVL_INUSE		(1 << 14)
 #define I_CREATING		(1 << 15)
diff --git a/include/trace/events/writeback.h b/include/trace/events/writeback.h
index 7565dcd596973..e7cbccc7c14cc 100644
--- a/include/trace/events/writeback.h
+++ b/include/trace/events/writeback.h
@@ -20,7 +20,6 @@
 		{I_CLEAR,		"I_CLEAR"},		\
 		{I_SYNC,		"I_SYNC"},		\
 		{I_DIRTY_TIME,		"I_DIRTY_TIME"},	\
-		{I_DIRTY_TIME_EXPIRED,	"I_DIRTY_TIME_EXPIRED"}, \
 		{I_REFERENCED,		"I_REFERENCED"}		\
 	)
 
-- 
GitLab


From ba25d977571e1551b7032d6104e49efd6f88f8ad Mon Sep 17 00:00:00 2001
From: Colin Xu <colin.xu@intel.com>
Date: Thu, 9 Jul 2020 15:09:56 +0800
Subject: [PATCH 0005/1341] drm/i915/gvt: Do not destroy ppgtt_mm during vGPU
 D3->D0.

When system enters S3 state, device enters D3 state while RAM remains
powered. From vGPU/GVT perspective, ppgtt_mm is residual in guest memory
during vGPU in D3 state, so that when guest state transits from S3->S0,
ppgtt_mm can be re-used and no need rebuild.

Previous implementation invalidate and destroy ppgtt_mm at DMLR,
regardless the power state transition is S0->S3->S0 (guest suspend or
resume) or OFF->S0 (normal boot/reboot), invalidate and destroy ppgtt_mm
is unnecessary in the former transition case.

The patch saves the vGPU D3/D0 transition state when guest writes the
PCI_PM_CTRL in vGPU's configure space, then in later DMLR, GVT can decide
whether or not invalidate and destroy ppgtt_mm is required. The
d3_entered flags is reset after DMLR.

To test this feature, make sure S3 is enabled in QEMU parameters:
i440fx: PIIX4_PM.disable_s3=0
q35: ICH9-LPC.disable_s3=0
Also need enable sleep option in guest OS if it's disabled.

v2:
- Revise commit message to more accurate description. (Kevin)
- Split patch by logic. (Zhenyu)

Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Hang Yuan <hang.yuan@linux.intel.com>
Signed-off-by: Colin Xu <colin.xu@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200709071002.247960-2-colin.xu@intel.com
---
 drivers/gpu/drm/i915/gvt/cfg_space.c | 24 ++++++++++++++++++++++++
 drivers/gpu/drm/i915/gvt/gtt.c       |  2 +-
 drivers/gpu/drm/i915/gvt/gtt.h       |  2 ++
 drivers/gpu/drm/i915/gvt/gvt.h       |  3 +++
 drivers/gpu/drm/i915/gvt/vgpu.c      | 17 +++++++++++++++--
 5 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/cfg_space.c b/drivers/gpu/drm/i915/gvt/cfg_space.c
index 072725a448db2..ad86c5eb5bba0 100644
--- a/drivers/gpu/drm/i915/gvt/cfg_space.c
+++ b/drivers/gpu/drm/i915/gvt/cfg_space.c
@@ -70,6 +70,7 @@ static void vgpu_pci_cfg_mem_write(struct intel_vgpu *vgpu, unsigned int off,
 {
 	u8 *cfg_base = vgpu_cfg_space(vgpu);
 	u8 mask, new, old;
+	pci_power_t pwr;
 	int i = 0;
 
 	for (; i < bytes && (off + i < sizeof(pci_cfg_space_rw_bmp)); i++) {
@@ -91,6 +92,15 @@ static void vgpu_pci_cfg_mem_write(struct intel_vgpu *vgpu, unsigned int off,
 	/* For other configuration space directly copy as it is. */
 	if (i < bytes)
 		memcpy(cfg_base + off + i, src + i, bytes - i);
+
+	if (off == vgpu->cfg_space.pmcsr_off && vgpu->cfg_space.pmcsr_off) {
+		pwr = (pci_power_t __force)(*(u16*)(&vgpu_cfg_space(vgpu)[off])
+			& PCI_PM_CTRL_STATE_MASK);
+		if (pwr == PCI_D3hot)
+			vgpu->d3_entered = true;
+		gvt_dbg_core("vgpu-%d power status changed to %d\n",
+			     vgpu->id, pwr);
+	}
 }
 
 /**
@@ -366,6 +376,7 @@ void intel_vgpu_init_cfg_space(struct intel_vgpu *vgpu,
 	struct intel_gvt *gvt = vgpu->gvt;
 	const struct intel_gvt_device_info *info = &gvt->device_info;
 	u16 *gmch_ctl;
+	u8 next;
 
 	memcpy(vgpu_cfg_space(vgpu), gvt->firmware.cfg_space,
 	       info->cfg_space_size);
@@ -401,6 +412,19 @@ void intel_vgpu_init_cfg_space(struct intel_vgpu *vgpu,
 		pci_resource_len(gvt->gt->i915->drm.pdev, 2);
 
 	memset(vgpu_cfg_space(vgpu) + PCI_ROM_ADDRESS, 0, 4);
+
+	/* PM Support */
+	vgpu->cfg_space.pmcsr_off = 0;
+	if (vgpu_cfg_space(vgpu)[PCI_STATUS] & PCI_STATUS_CAP_LIST) {
+		next = vgpu_cfg_space(vgpu)[PCI_CAPABILITY_LIST];
+		do {
+			if (vgpu_cfg_space(vgpu)[next + PCI_CAP_LIST_ID] == PCI_CAP_ID_PM) {
+				vgpu->cfg_space.pmcsr_off = next + PCI_PM_CTRL;
+				break;
+			}
+			next = vgpu_cfg_space(vgpu)[next + PCI_CAP_LIST_NEXT];
+		} while (next);
+	}
 }
 
 /**
diff --git a/drivers/gpu/drm/i915/gvt/gtt.c b/drivers/gpu/drm/i915/gvt/gtt.c
index 210016192ce70..a3a4305eda01b 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.c
+++ b/drivers/gpu/drm/i915/gvt/gtt.c
@@ -2501,7 +2501,7 @@ int intel_vgpu_init_gtt(struct intel_vgpu *vgpu)
 	return create_scratch_page_tree(vgpu);
 }
 
-static void intel_vgpu_destroy_all_ppgtt_mm(struct intel_vgpu *vgpu)
+void intel_vgpu_destroy_all_ppgtt_mm(struct intel_vgpu *vgpu)
 {
 	struct list_head *pos, *n;
 	struct intel_vgpu_mm *mm;
diff --git a/drivers/gpu/drm/i915/gvt/gtt.h b/drivers/gpu/drm/i915/gvt/gtt.h
index 320b8d6ad92fa..52d0d88abd86a 100644
--- a/drivers/gpu/drm/i915/gvt/gtt.h
+++ b/drivers/gpu/drm/i915/gvt/gtt.h
@@ -279,4 +279,6 @@ int intel_vgpu_emulate_ggtt_mmio_read(struct intel_vgpu *vgpu,
 int intel_vgpu_emulate_ggtt_mmio_write(struct intel_vgpu *vgpu,
 	unsigned int off, void *p_data, unsigned int bytes);
 
+void intel_vgpu_destroy_all_ppgtt_mm(struct intel_vgpu *vgpu);
+
 #endif /* _GVT_GTT_H_ */
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index a4a6db6b7f908..ff7f2515a6fe6 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -106,6 +106,7 @@ struct intel_vgpu_pci_bar {
 struct intel_vgpu_cfg_space {
 	unsigned char virtual_cfg_space[PCI_CFG_SPACE_EXP_SIZE];
 	struct intel_vgpu_pci_bar bar[INTEL_GVT_MAX_BAR_NUM];
+	u32 pmcsr_off;
 };
 
 #define vgpu_cfg_space(vgpu) ((vgpu)->cfg_space.virtual_cfg_space)
@@ -198,6 +199,8 @@ struct intel_vgpu {
 	struct intel_vgpu_submission submission;
 	struct radix_tree_root page_track_tree;
 	u32 hws_pga[I915_NUM_ENGINES];
+	/* Set on PCI_D3, reset on DMLR, not reflecting the actual PM state */
+	bool d3_entered;
 
 	struct dentry *debugfs;
 
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index 7d361623ff679..fb12448fe3534 100644
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -257,6 +257,7 @@ void intel_gvt_release_vgpu(struct intel_vgpu *vgpu)
 	intel_gvt_deactivate_vgpu(vgpu);
 
 	mutex_lock(&vgpu->vgpu_lock);
+	vgpu->d3_entered = false;
 	intel_vgpu_clean_workloads(vgpu, ALL_ENGINES);
 	intel_vgpu_dmabuf_cleanup(vgpu);
 	mutex_unlock(&vgpu->vgpu_lock);
@@ -393,6 +394,7 @@ static struct intel_vgpu *__intel_gvt_create_vgpu(struct intel_gvt *gvt,
 	INIT_RADIX_TREE(&vgpu->page_track_tree, GFP_KERNEL);
 	idr_init(&vgpu->object_idr);
 	intel_vgpu_init_cfg_space(vgpu, param->primary);
+	vgpu->d3_entered = false;
 
 	ret = intel_vgpu_init_mmio(vgpu);
 	if (ret)
@@ -557,10 +559,15 @@ void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
 	/* full GPU reset or device model level reset */
 	if (engine_mask == ALL_ENGINES || dmlr) {
 		intel_vgpu_select_submission_ops(vgpu, ALL_ENGINES, 0);
-		intel_vgpu_invalidate_ppgtt(vgpu);
+		if (engine_mask == ALL_ENGINES)
+			intel_vgpu_invalidate_ppgtt(vgpu);
 		/*fence will not be reset during virtual reset */
 		if (dmlr) {
-			intel_vgpu_reset_gtt(vgpu);
+			if(!vgpu->d3_entered) {
+				intel_vgpu_invalidate_ppgtt(vgpu);
+				intel_vgpu_destroy_all_ppgtt_mm(vgpu);
+			}
+			intel_vgpu_reset_ggtt(vgpu, true);
 			intel_vgpu_reset_resource(vgpu);
 		}
 
@@ -573,6 +580,12 @@ void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
 			/* only reset the failsafe mode when dmlr reset */
 			vgpu->failsafe = false;
 			vgpu->pv_notified = false;
+			/*
+			 * PCI_D0 is set before dmlr, so reset d3_entered here
+			 * after done using.
+			 */
+			if(vgpu->d3_entered)
+				vgpu->d3_entered = false;
 		}
 	}
 
-- 
GitLab


From 9e7c0efadb86ddb58965561bbca638d44792d78f Mon Sep 17 00:00:00 2001
From: Colin Xu <colin.xu@intel.com>
Date: Thu, 9 Jul 2020 15:09:57 +0800
Subject: [PATCH 0006/1341] drm/i915/gvt: Do not reset pv_notified when vGPU
 transit from D3->D0

Unlike full initialization like normal boot, guest driver won't
pv_notified GVT when vGPU transit from D3->D0. If pv_notified is reset,
later vGPU operations will trigger enter into failsafe mode.

Considering the fact that vGPU will at least notify GVT pv_notified once
before D3/D0 transition, it's safe to skip reset pv_notified in D3->D0.

To test this feature, make sure S3 is enabled in QEMU parameters:
i440fx: PIIX4_PM.disable_s3=0
q35: ICH9-LPC.disable_s3=0
Also need enable sleep option in guest OS if it's disabled.

v2:
- Revise commit message to more accurate description. (Kevin)
- Split patch by logic. (Zhenyu)

Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Hang Yuan <hang.yuan@linux.intel.com>
Signed-off-by: Colin Xu <colin.xu@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200709071002.247960-3-colin.xu@intel.com
---
 drivers/gpu/drm/i915/gvt/vgpu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
index fb12448fe3534..8fa9b31a24840 100644
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
@@ -579,13 +579,14 @@ void intel_gvt_reset_vgpu_locked(struct intel_vgpu *vgpu, bool dmlr,
 			intel_vgpu_reset_cfg_space(vgpu);
 			/* only reset the failsafe mode when dmlr reset */
 			vgpu->failsafe = false;
-			vgpu->pv_notified = false;
 			/*
 			 * PCI_D0 is set before dmlr, so reset d3_entered here
 			 * after done using.
 			 */
 			if(vgpu->d3_entered)
 				vgpu->d3_entered = false;
+			else
+				vgpu->pv_notified = false;
 		}
 	}
 
-- 
GitLab


From e4d7f2d3593e703a4d58b813f332a5c2aef5106f Mon Sep 17 00:00:00 2001
From: Keyur Patel <iamkeyur96@gmail.com>
Date: Wed, 10 Jun 2020 23:19:46 -0400
Subject: [PATCH 0007/1341] ext4: fix spelling mistakes in extents.c

Fix spelling issues over the comments in the code.

requsted ==> requested
deterimined ==> determined
insde ==> inside
neet ==> need
somthing ==> something

Signed-off-by: Keyur Patel <iamkeyur96@gmail.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200611031947.165079-1-iamkeyur96@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/extents.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 221f240eae604..1106ee17aa217 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1915,7 +1915,7 @@ static unsigned int ext4_ext_check_overlap(struct ext4_sb_info *sbi,
 
 /*
  * ext4_ext_insert_extent:
- * tries to merge requsted extent into the existing extent or
+ * tries to merge requested extent into the existing extent or
  * inserts requested extent as new one into the tree,
  * creating new leaf in the no-space case.
  */
@@ -3125,7 +3125,7 @@ static int ext4_ext_zeroout(struct inode *inode, struct ext4_extent *ex)
  *
  *
  * Splits extent [a, b] into two extents [a, @split) and [@split, b], states
- * of which are deterimined by split_flag.
+ * of which are determined by split_flag.
  *
  * There are two cases:
  *  a> the extent are splitted into two extent.
@@ -3650,7 +3650,7 @@ static int ext4_split_convert_extents(handle_t *handle,
 		eof_block = map->m_lblk + map->m_len;
 	/*
 	 * It is safe to convert extent to initialized via explicit
-	 * zeroout only if extent is fully insde i_size or new_size.
+	 * zeroout only if extent is fully inside i_size or new_size.
 	 */
 	depth = ext_depth(inode);
 	ex = path[depth].p_ext;
@@ -4495,7 +4495,7 @@ static long ext4_zero_range(struct file *file, loff_t offset,
 	}
 
 	/*
-	 * Round up offset. This is not fallocate, we neet to zero out
+	 * Round up offset. This is not fallocate, we need to zero out
 	 * blocks, so convert interior block aligned part of the range to
 	 * unwritten and possibly manually zero out unaligned parts of the
 	 * range.
@@ -5579,7 +5579,7 @@ ext4_swap_extents(handle_t *handle, struct inode *inode1,
 		}
 		ex1 = path1[path1->p_depth].p_ext;
 		ex2 = path2[path2->p_depth].p_ext;
-		/* Do we have somthing to swap ? */
+		/* Do we have something to swap ? */
 		if (unlikely(!ex2 || !ex1))
 			goto finish;
 
-- 
GitLab


From f36e8edb95734c03134db628afa25ee23b8e0d95 Mon Sep 17 00:00:00 2001
From: Shengjiu Wang <shengjiu.wang@nxp.com>
Date: Mon, 3 Aug 2020 10:13:31 +0800
Subject: [PATCH 0008/1341] ASoC: fsl-asoc-card: Remove
 fsl_asoc_card_set_bias_level function

With this case:
aplay -Dhw:x 16khz.wav 24khz.wav
There is sound distortion for 24khz.wav. The reason is that setting
PLL of WM8962 with set_bias_level function, the bias level is not
changed when 24khz.wav is played, then the PLL won't be reset, the
clock is not correct, so distortion happens.

The resolution of this issue is to remove fsl_asoc_card_set_bias_level.
Move PLL configuration to hw_params and hw_free.

After removing fsl_asoc_card_set_bias_level, also test WM8960 case,
it can work.

Fixes: 708b4351f08c ("ASoC: fsl: Add Freescale Generic ASoC Sound Card with ASRC support")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Link: https://lore.kernel.org/r/1596420811-16690-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/fsl/fsl-asoc-card.c | 154 ++++++++++++++++------------------
 1 file changed, 70 insertions(+), 84 deletions(-)

diff --git a/sound/soc/fsl/fsl-asoc-card.c b/sound/soc/fsl/fsl-asoc-card.c
index de136c0a497dd..52adedc03245b 100644
--- a/sound/soc/fsl/fsl-asoc-card.c
+++ b/sound/soc/fsl/fsl-asoc-card.c
@@ -73,6 +73,7 @@ struct cpu_priv {
  * @codec_priv: CODEC private data
  * @cpu_priv: CPU private data
  * @card: ASoC card structure
+ * @streams: Mask of current active streams
  * @sample_rate: Current sample rate
  * @sample_format: Current sample format
  * @asrc_rate: ASRC sample rate used by Back-Ends
@@ -89,6 +90,7 @@ struct fsl_asoc_card_priv {
 	struct codec_priv codec_priv;
 	struct cpu_priv cpu_priv;
 	struct snd_soc_card card;
+	u8 streams;
 	u32 sample_rate;
 	snd_pcm_format_t sample_format;
 	u32 asrc_rate;
@@ -151,21 +153,17 @@ static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
 	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	struct codec_priv *codec_priv = &priv->codec_priv;
 	struct cpu_priv *cpu_priv = &priv->cpu_priv;
 	struct device *dev = rtd->card->dev;
+	unsigned int pll_out;
 	int ret;
 
 	priv->sample_rate = params_rate(params);
 	priv->sample_format = params_format(params);
+	priv->streams |= BIT(substream->stream);
 
-	/*
-	 * If codec-dai is DAI Master and all configurations are already in the
-	 * set_bias_level(), bypass the remaining settings in hw_params().
-	 * Note: (dai_fmt & CBM_CFM) includes CBM_CFM and CBM_CFS.
-	 */
-	if ((priv->card.set_bias_level &&
-	     priv->dai_fmt & SND_SOC_DAIFMT_CBM_CFM) ||
-	    fsl_asoc_card_is_ac97(priv))
+	if (fsl_asoc_card_is_ac97(priv))
 		return 0;
 
 	/* Specific configurations of DAIs starts from here */
@@ -174,7 +172,7 @@ static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
 				     cpu_priv->sysclk_dir[tx]);
 	if (ret && ret != -ENOTSUPP) {
 		dev_err(dev, "failed to set sysclk for cpu dai\n");
-		return ret;
+		goto fail;
 	}
 
 	if (cpu_priv->slot_width) {
@@ -182,6 +180,68 @@ static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
 					       cpu_priv->slot_width);
 		if (ret && ret != -ENOTSUPP) {
 			dev_err(dev, "failed to set TDM slot for cpu dai\n");
+			goto fail;
+		}
+	}
+
+	/* Specific configuration for PLL */
+	if (codec_priv->pll_id && codec_priv->fll_id) {
+		if (priv->sample_format == SNDRV_PCM_FORMAT_S24_LE)
+			pll_out = priv->sample_rate * 384;
+		else
+			pll_out = priv->sample_rate * 256;
+
+		ret = snd_soc_dai_set_pll(asoc_rtd_to_codec(rtd, 0),
+					  codec_priv->pll_id,
+					  codec_priv->mclk_id,
+					  codec_priv->mclk_freq, pll_out);
+		if (ret) {
+			dev_err(dev, "failed to start FLL: %d\n", ret);
+			goto fail;
+		}
+
+		ret = snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0),
+					     codec_priv->fll_id,
+					     pll_out, SND_SOC_CLOCK_IN);
+
+		if (ret && ret != -ENOTSUPP) {
+			dev_err(dev, "failed to set SYSCLK: %d\n", ret);
+			goto fail;
+		}
+	}
+
+	return 0;
+
+fail:
+	priv->streams &= ~BIT(substream->stream);
+	return ret;
+}
+
+static int fsl_asoc_card_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(rtd->card);
+	struct codec_priv *codec_priv = &priv->codec_priv;
+	struct device *dev = rtd->card->dev;
+	int ret;
+
+	priv->streams &= ~BIT(substream->stream);
+
+	if (!priv->streams && codec_priv->pll_id && codec_priv->fll_id) {
+		/* Force freq to be 0 to avoid error message in codec */
+		ret = snd_soc_dai_set_sysclk(asoc_rtd_to_codec(rtd, 0),
+					     codec_priv->mclk_id,
+					     0,
+					     SND_SOC_CLOCK_IN);
+		if (ret) {
+			dev_err(dev, "failed to switch away from FLL: %d\n", ret);
+			return ret;
+		}
+
+		ret = snd_soc_dai_set_pll(asoc_rtd_to_codec(rtd, 0),
+					  codec_priv->pll_id, 0, 0, 0);
+		if (ret && ret != -ENOTSUPP) {
+			dev_err(dev, "failed to stop FLL: %d\n", ret);
 			return ret;
 		}
 	}
@@ -191,6 +251,7 @@ static int fsl_asoc_card_hw_params(struct snd_pcm_substream *substream,
 
 static const struct snd_soc_ops fsl_asoc_card_ops = {
 	.hw_params = fsl_asoc_card_hw_params,
+	.hw_free = fsl_asoc_card_hw_free,
 };
 
 static int be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
@@ -254,75 +315,6 @@ static struct snd_soc_dai_link fsl_asoc_card_dai[] = {
 	},
 };
 
-static int fsl_asoc_card_set_bias_level(struct snd_soc_card *card,
-					struct snd_soc_dapm_context *dapm,
-					enum snd_soc_bias_level level)
-{
-	struct fsl_asoc_card_priv *priv = snd_soc_card_get_drvdata(card);
-	struct snd_soc_pcm_runtime *rtd;
-	struct snd_soc_dai *codec_dai;
-	struct codec_priv *codec_priv = &priv->codec_priv;
-	struct device *dev = card->dev;
-	unsigned int pll_out;
-	int ret;
-
-	rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
-	codec_dai = asoc_rtd_to_codec(rtd, 0);
-	if (dapm->dev != codec_dai->dev)
-		return 0;
-
-	switch (level) {
-	case SND_SOC_BIAS_PREPARE:
-		if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
-			break;
-
-		if (priv->sample_format == SNDRV_PCM_FORMAT_S24_LE)
-			pll_out = priv->sample_rate * 384;
-		else
-			pll_out = priv->sample_rate * 256;
-
-		ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id,
-					  codec_priv->mclk_id,
-					  codec_priv->mclk_freq, pll_out);
-		if (ret) {
-			dev_err(dev, "failed to start FLL: %d\n", ret);
-			return ret;
-		}
-
-		ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->fll_id,
-					     pll_out, SND_SOC_CLOCK_IN);
-		if (ret && ret != -ENOTSUPP) {
-			dev_err(dev, "failed to set SYSCLK: %d\n", ret);
-			return ret;
-		}
-		break;
-
-	case SND_SOC_BIAS_STANDBY:
-		if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
-			break;
-
-		ret = snd_soc_dai_set_sysclk(codec_dai, codec_priv->mclk_id,
-					     codec_priv->mclk_freq,
-					     SND_SOC_CLOCK_IN);
-		if (ret && ret != -ENOTSUPP) {
-			dev_err(dev, "failed to switch away from FLL: %d\n", ret);
-			return ret;
-		}
-
-		ret = snd_soc_dai_set_pll(codec_dai, codec_priv->pll_id, 0, 0, 0);
-		if (ret) {
-			dev_err(dev, "failed to stop FLL: %d\n", ret);
-			return ret;
-		}
-		break;
-
-	default:
-		break;
-	}
-
-	return 0;
-}
-
 static int fsl_asoc_card_audmux_init(struct device_node *np,
 				     struct fsl_asoc_card_priv *priv)
 {
@@ -611,7 +603,6 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
 	/* Diversify the card configurations */
 	if (of_device_is_compatible(np, "fsl,imx-audio-cs42888")) {
 		codec_dai_name = "cs42888";
-		priv->card.set_bias_level = NULL;
 		priv->cpu_priv.sysclk_freq[TX] = priv->codec_priv.mclk_freq;
 		priv->cpu_priv.sysclk_freq[RX] = priv->codec_priv.mclk_freq;
 		priv->cpu_priv.sysclk_dir[TX] = SND_SOC_CLOCK_OUT;
@@ -628,26 +619,22 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
 		priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 	} else if (of_device_is_compatible(np, "fsl,imx-audio-wm8962")) {
 		codec_dai_name = "wm8962";
-		priv->card.set_bias_level = fsl_asoc_card_set_bias_level;
 		priv->codec_priv.mclk_id = WM8962_SYSCLK_MCLK;
 		priv->codec_priv.fll_id = WM8962_SYSCLK_FLL;
 		priv->codec_priv.pll_id = WM8962_FLL;
 		priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 	} else if (of_device_is_compatible(np, "fsl,imx-audio-wm8960")) {
 		codec_dai_name = "wm8960-hifi";
-		priv->card.set_bias_level = fsl_asoc_card_set_bias_level;
 		priv->codec_priv.fll_id = WM8960_SYSCLK_AUTO;
 		priv->codec_priv.pll_id = WM8960_SYSCLK_AUTO;
 		priv->dai_fmt |= SND_SOC_DAIFMT_CBM_CFM;
 	} else if (of_device_is_compatible(np, "fsl,imx-audio-ac97")) {
 		codec_dai_name = "ac97-hifi";
-		priv->card.set_bias_level = NULL;
 		priv->dai_fmt = SND_SOC_DAIFMT_AC97;
 		priv->card.dapm_routes = audio_map_ac97;
 		priv->card.num_dapm_routes = ARRAY_SIZE(audio_map_ac97);
 	} else if (of_device_is_compatible(np, "fsl,imx-audio-mqs")) {
 		codec_dai_name = "fsl-mqs-dai";
-		priv->card.set_bias_level = NULL;
 		priv->dai_fmt = SND_SOC_DAIFMT_LEFT_J |
 				SND_SOC_DAIFMT_CBS_CFS |
 				SND_SOC_DAIFMT_NB_NF;
@@ -657,7 +644,6 @@ static int fsl_asoc_card_probe(struct platform_device *pdev)
 		priv->card.num_dapm_routes = ARRAY_SIZE(audio_map_tx);
 	} else if (of_device_is_compatible(np, "fsl,imx-audio-wm8524")) {
 		codec_dai_name = "wm8524-hifi";
-		priv->card.set_bias_level = NULL;
 		priv->dai_fmt |= SND_SOC_DAIFMT_CBS_CFS;
 		priv->dai_link[1].dpcm_capture = 0;
 		priv->dai_link[2].dpcm_capture = 0;
-- 
GitLab


From b023666e6c0165651de18cabcbb65ba14f2db153 Mon Sep 17 00:00:00 2001
From: Fabio Estevam <festevam@gmail.com>
Date: Mon, 3 Aug 2020 08:52:33 -0300
Subject: [PATCH 0009/1341] ASoC: wm8962: Do not remove ADDITIONAL_CONTROL_4
 from readable register list

Removing ADDITIONAL_CONTROL_4 from the list of readable registers cause
audio distortion.

This change was sent as a comment below the --- line when submitting
commit 658bb297e393 ("ASoC: wm8962: Do not access WM8962_GPIO_BASE"), so
it was not supposed to get merged.

Keep WM8962_ADDITIONAL_CONTROL_4 inside wm8962_readable_register() to
fix the regression.

Fixes: 658bb297e393 ("ASoC: wm8962: Do not access WM8962_GPIO_BASE")
Reported-by: Shengjiu Wang <shengjiu.wang@gmail.com>
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20200803115233.19034-1-festevam@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/wm8962.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index 317916cb4e27b..0623a2251084e 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -151,7 +151,6 @@ static const struct reg_default wm8962_reg[] = {
 	{ 40, 0x0000 },   /* R40    - SPKOUTL volume */
 	{ 41, 0x0000 },   /* R41    - SPKOUTR volume */
 
-	{ 48, 0x0000 },   /* R48    - Additional control(4) */
 	{ 49, 0x0010 },   /* R49    - Class D Control 1 */
 	{ 51, 0x0003 },   /* R51    - Class D Control 2 */
 
@@ -842,6 +841,7 @@ static bool wm8962_readable_register(struct device *dev, unsigned int reg)
 	case WM8962_SPKOUTL_VOLUME:
 	case WM8962_SPKOUTR_VOLUME:
 	case WM8962_THERMAL_SHUTDOWN_STATUS:
+	case WM8962_ADDITIONAL_CONTROL_4:
 	case WM8962_CLASS_D_CONTROL_1:
 	case WM8962_CLASS_D_CONTROL_2:
 	case WM8962_CLOCKING_4:
-- 
GitLab


From ccff7bd468d5e0595176656a051ef67c01f01968 Mon Sep 17 00:00:00 2001
From: Hui Wang <hui.wang@canonical.com>
Date: Thu, 30 Jul 2020 20:31:38 +0800
Subject: [PATCH 0010/1341] ASoC: amd: renoir: restore two more registers
 during resume

Recently we found an issue about the suspend and resume. If dmic is
recording the sound, and we run suspend and resume, after the resume,
the dmic can't work well anymore. we need to close the app and reopen
the app, then the dmic could record the sound again.

For example, we run "arecord -D hw:CARD=acp,DEV=0 -f S32_LE -c 2
-r 48000 test.wav", then suspend and resume, after the system resume
back, we speak to the dmic. then stop the arecord, use aplay to play
the test.wav, we could hear the sound recorded after resume is weird,
it is not what we speak to the dmic.

I found two registers are set in the dai_hw_params(), if the two
registers are set during the resume, this issue could be fixed.
Move the code of the dai_hw_params() into the pdm_dai_trigger(), then
these two registers will be set during resume since pdm_dai_trigger()
will be called during resume. And delete the empty function
dai_hw_params().

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Reviewed-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200730123138.5659-1-hui.wang@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/amd/renoir/acp3x-pdm-dma.c | 29 +++++++++-------------------
 1 file changed, 9 insertions(+), 20 deletions(-)

diff --git a/sound/soc/amd/renoir/acp3x-pdm-dma.c b/sound/soc/amd/renoir/acp3x-pdm-dma.c
index 623dfd3ea7051..7b14d9a81b97a 100644
--- a/sound/soc/amd/renoir/acp3x-pdm-dma.c
+++ b/sound/soc/amd/renoir/acp3x-pdm-dma.c
@@ -314,40 +314,30 @@ static int acp_pdm_dma_close(struct snd_soc_component *component,
 	return 0;
 }
 
-static int acp_pdm_dai_hw_params(struct snd_pcm_substream *substream,
-				 struct snd_pcm_hw_params *params,
-				 struct snd_soc_dai *dai)
+static int acp_pdm_dai_trigger(struct snd_pcm_substream *substream,
+			       int cmd, struct snd_soc_dai *dai)
 {
 	struct pdm_stream_instance *rtd;
+	int ret;
+	bool pdm_status;
 	unsigned int ch_mask;
 
 	rtd = substream->runtime->private_data;
-	switch (params_channels(params)) {
+	ret = 0;
+	switch (substream->runtime->channels) {
 	case TWO_CH:
 		ch_mask = 0x00;
 		break;
 	default:
 		return -EINVAL;
 	}
-	rn_writel(ch_mask, rtd->acp_base + ACP_WOV_PDM_NO_OF_CHANNELS);
-	rn_writel(PDM_DECIMATION_FACTOR, rtd->acp_base +
-		  ACP_WOV_PDM_DECIMATION_FACTOR);
-	return 0;
-}
-
-static int acp_pdm_dai_trigger(struct snd_pcm_substream *substream,
-			       int cmd, struct snd_soc_dai *dai)
-{
-	struct pdm_stream_instance *rtd;
-	int ret;
-	bool pdm_status;
-
-	rtd = substream->runtime->private_data;
-	ret = 0;
 	switch (cmd) {
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_RESUME:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		rn_writel(ch_mask, rtd->acp_base + ACP_WOV_PDM_NO_OF_CHANNELS);
+		rn_writel(PDM_DECIMATION_FACTOR, rtd->acp_base +
+			  ACP_WOV_PDM_DECIMATION_FACTOR);
 		rtd->bytescount = acp_pdm_get_byte_count(rtd,
 							 substream->stream);
 		pdm_status = check_pdm_dma_status(rtd->acp_base);
@@ -369,7 +359,6 @@ static int acp_pdm_dai_trigger(struct snd_pcm_substream *substream,
 }
 
 static struct snd_soc_dai_ops acp_pdm_dai_ops = {
-	.hw_params = acp_pdm_dai_hw_params,
 	.trigger   = acp_pdm_dai_trigger,
 };
 
-- 
GitLab


From b191f01a3756f8d5d0b92bad0a07dac7e373d8be Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 3 Aug 2020 16:18:46 +0200
Subject: [PATCH 0011/1341] ASoC: tegra: tegra186_dspk: Fix compile warning
 with CONFIG_PM=n

Fix trivial compile warnings wrt unused functions by adding
__maybe_unused prefix:
  sound/soc/tegra/tegra186_dspk.c:74:12: warning: 'tegra186_dspk_runtime_suspend' defined but not used [-Wunused-function]
  sound/soc/tegra/tegra186_dspk.c:86:12: warning: 'tegra186_dspk_runtime_resume' defined but not used [-Wunused-function]

Fixes: 327ef6470266 ("ASoC: tegra: Add Tegra186 based DSPK driver")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200803141850.23713-2-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/tegra/tegra186_dspk.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra186_dspk.c b/sound/soc/tegra/tegra186_dspk.c
index fe7117171a0e7..0cbe31e2c7e9c 100644
--- a/sound/soc/tegra/tegra186_dspk.c
+++ b/sound/soc/tegra/tegra186_dspk.c
@@ -71,7 +71,7 @@ static int tegra186_dspk_put_control(struct snd_kcontrol *kcontrol,
 	return 0;
 }
 
-static int tegra186_dspk_runtime_suspend(struct device *dev)
+static int __maybe_unused tegra186_dspk_runtime_suspend(struct device *dev)
 {
 	struct tegra186_dspk *dspk = dev_get_drvdata(dev);
 
@@ -83,7 +83,7 @@ static int tegra186_dspk_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra186_dspk_runtime_resume(struct device *dev)
+static int __maybe_unused tegra186_dspk_runtime_resume(struct device *dev)
 {
 	struct tegra186_dspk *dspk = dev_get_drvdata(dev);
 	int err;
-- 
GitLab


From 1337f2c5f104c84d5a943b2eb644db3eaf4a64e0 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 3 Aug 2020 16:18:47 +0200
Subject: [PATCH 0012/1341] ASoC: tegra: tegra210_admaif: Fix compile warning
 with CONFIG_PM=n

Fix trivial compile warnings wrt unused functions by adding
__maybe_unused prefix:
  sound/soc/tegra/tegra210_admaif.c:232:12: warning: 'tegra_admaif_runtime_resume' defined but not used [-Wunused-function]
  sound/soc/tegra/tegra210_ahub.c:567:12: warning: 'tegra_ahub_runtime_suspend' defined but not used [-Wunused-function]

Fixes: f74028e159bb ("ASoC: tegra: Add Tegra210 based ADMAIF driver")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200803141850.23713-3-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/tegra/tegra210_admaif.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra210_admaif.c b/sound/soc/tegra/tegra210_admaif.c
index 4894e8e6ee7fd..1268046b345d9 100644
--- a/sound/soc/tegra/tegra210_admaif.c
+++ b/sound/soc/tegra/tegra210_admaif.c
@@ -219,7 +219,7 @@ static const struct regmap_config tegra186_admaif_regmap_config = {
 	.cache_type		= REGCACHE_FLAT,
 };
 
-static int tegra_admaif_runtime_suspend(struct device *dev)
+static int __maybe_unused tegra_admaif_runtime_suspend(struct device *dev)
 {
 	struct tegra_admaif *admaif = dev_get_drvdata(dev);
 
@@ -229,7 +229,7 @@ static int tegra_admaif_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra_admaif_runtime_resume(struct device *dev)
+static int __maybe_unused tegra_admaif_runtime_resume(struct device *dev)
 {
 	struct tegra_admaif *admaif = dev_get_drvdata(dev);
 
-- 
GitLab


From fafac559604bd2e74f5f6febd58682df3738cdd9 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 3 Aug 2020 16:18:48 +0200
Subject: [PATCH 0013/1341] ASoC: tegra: tegra210_ahub: Fix compile warning
 with CONFIG_PM=n

Fix trivial compile warnings wrt unused functions by adding
__maybe_unused prefix:
  sound/soc/tegra/tegra210_ahub.c:567:12: warning: 'tegra_ahub_runtime_suspend' defined but not used [-Wunused-function]
  sound/soc/tegra/tegra210_ahub.c:579:12: warning: 'tegra_ahub_runtime_resume' defined but not used [-Wunused-function]

Fixes: 16e1bcc2caf4 ("ASoC: tegra: Add Tegra210 based AHUB driver")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200803141850.23713-4-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/tegra/tegra210_ahub.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra210_ahub.c b/sound/soc/tegra/tegra210_ahub.c
index 5123a96fdde8f..66287a7c9865d 100644
--- a/sound/soc/tegra/tegra210_ahub.c
+++ b/sound/soc/tegra/tegra210_ahub.c
@@ -564,7 +564,7 @@ static const struct of_device_id tegra_ahub_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, tegra_ahub_of_match);
 
-static int tegra_ahub_runtime_suspend(struct device *dev)
+static int __maybe_unused tegra_ahub_runtime_suspend(struct device *dev)
 {
 	struct tegra_ahub *ahub = dev_get_drvdata(dev);
 
@@ -576,7 +576,7 @@ static int tegra_ahub_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra_ahub_runtime_resume(struct device *dev)
+static int __maybe_unused tegra_ahub_runtime_resume(struct device *dev)
 {
 	struct tegra_ahub *ahub = dev_get_drvdata(dev);
 	int err;
-- 
GitLab


From 7543f16a04465db95e83e8409e246f49f35c874a Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 3 Aug 2020 16:18:49 +0200
Subject: [PATCH 0014/1341] ASoC: tegra: tegra210_dmic: Fix compile warning
 with CONFIG_PM=n

Fix trivial compile warnings wrt unused functions by adding
__maybe_unused prefix:
  sound/soc/tegra/tegra210_dmic.c:43:12: warning: 'tegra210_dmic_runtime_suspend' defined but not used [-Wunused-function]
  sound/soc/tegra/tegra210_dmic.c:55:12: warning: 'tegra210_dmic_runtime_resume' defined but not used [-Wunused-function]

Fixes: 8c8ff982e9e2 ("ASoC: tegra: Add Tegra210 based DMIC driver")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200803141850.23713-5-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/tegra/tegra210_dmic.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra210_dmic.c b/sound/soc/tegra/tegra210_dmic.c
index d682414ad90dc..a661f40bc41c7 100644
--- a/sound/soc/tegra/tegra210_dmic.c
+++ b/sound/soc/tegra/tegra210_dmic.c
@@ -40,7 +40,7 @@ static const struct reg_default tegra210_dmic_reg_defaults[] = {
 	{ TEGRA210_DMIC_LP_BIQUAD_1_COEF_4, 0x0 },
 };
 
-static int tegra210_dmic_runtime_suspend(struct device *dev)
+static int __maybe_unused tegra210_dmic_runtime_suspend(struct device *dev)
 {
 	struct tegra210_dmic *dmic = dev_get_drvdata(dev);
 
@@ -52,7 +52,7 @@ static int tegra210_dmic_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra210_dmic_runtime_resume(struct device *dev)
+static int __maybe_unused tegra210_dmic_runtime_resume(struct device *dev)
 {
 	struct tegra210_dmic *dmic = dev_get_drvdata(dev);
 	int err;
-- 
GitLab


From 823279c374669a15a139a29b891dc0d7460262c6 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 3 Aug 2020 16:18:50 +0200
Subject: [PATCH 0015/1341] ASoC: tegra: tegra210_i2s: Fix compile warning with
 CONFIG_PM=n

Fix trivial compile warnings wrt unused functions by adding
__maybe_unused prefix:
  sound/soc/tegra/tegra210_i2s.c:167:12: warning: 'tegra210_i2s_runtime_suspend' defined but not used [-Wunused-function]
  sound/soc/tegra/tegra210_i2s.c:179:12: warning: 'tegra210_i2s_runtime_resume' defined but not used [-Wunused-function]

Fixes: c0bfa98349d1 ("ASoC: tegra: Add Tegra210 based I2S driver")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200803141850.23713-6-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/tegra/tegra210_i2s.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/tegra/tegra210_i2s.c b/sound/soc/tegra/tegra210_i2s.c
index 722092181583e..a383bd5c51cd4 100644
--- a/sound/soc/tegra/tegra210_i2s.c
+++ b/sound/soc/tegra/tegra210_i2s.c
@@ -164,7 +164,7 @@ static int tegra210_i2s_init(struct snd_soc_dapm_widget *w,
 	return tegra210_i2s_sw_reset(compnt, is_playback);
 }
 
-static int tegra210_i2s_runtime_suspend(struct device *dev)
+static int __maybe_unused tegra210_i2s_runtime_suspend(struct device *dev)
 {
 	struct tegra210_i2s *i2s = dev_get_drvdata(dev);
 
@@ -176,7 +176,7 @@ static int tegra210_i2s_runtime_suspend(struct device *dev)
 	return 0;
 }
 
-static int tegra210_i2s_runtime_resume(struct device *dev)
+static int __maybe_unused tegra210_i2s_runtime_resume(struct device *dev)
 {
 	struct tegra210_i2s *i2s = dev_get_drvdata(dev);
 	int err;
-- 
GitLab


From 9493755d7c1156b00b58376752d4c3df7c0a01ec Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 3 Aug 2020 16:46:30 +0200
Subject: [PATCH 0016/1341] ASoC: fsl: Fix unused variable warning

The variable rtd was left unused in psc_dma_free(), even unnoticed
during conversion to a new style:
  sound/soc/fsl/mpc5200_dma.c:342:30: warning: unused variable 'rtd' [-Wunused-variable]

Drop the superfluous one.

Fixes: 6d1048bc1152 ("ASoC: fsl: mpc5200_dma: remove snd_pcm_ops")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200803144630.9615-1-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/fsl/mpc5200_dma.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/sound/soc/fsl/mpc5200_dma.c b/sound/soc/fsl/mpc5200_dma.c
index 9e4f66b6b92b0..2319848821762 100644
--- a/sound/soc/fsl/mpc5200_dma.c
+++ b/sound/soc/fsl/mpc5200_dma.c
@@ -339,7 +339,6 @@ static int psc_dma_new(struct snd_soc_component *component,
 static void psc_dma_free(struct snd_soc_component *component,
 			 struct snd_pcm *pcm)
 {
-	struct snd_soc_pcm_runtime *rtd = pcm->private_data;
 	struct snd_pcm_substream *substream;
 	int stream;
 
-- 
GitLab


From ce4109005770ff6f160e1424928b9cc696e8c8f2 Mon Sep 17 00:00:00 2001
From: Axel Lin <axel.lin@ingics.com>
Date: Sun, 2 Aug 2020 11:25:09 +0800
Subject: [PATCH 0017/1341] regulator: cros-ec-regulator: Add NULL test for
 devm_kmemdup call

Fix possible NULL pointer dereference.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Link: https://lore.kernel.org/r/20200802032509.305425-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/cros-ec-regulator.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/regulator/cros-ec-regulator.c b/drivers/regulator/cros-ec-regulator.c
index 3117bbd2826b2..eb3fc1db4edc8 100644
--- a/drivers/regulator/cros-ec-regulator.c
+++ b/drivers/regulator/cros-ec-regulator.c
@@ -170,6 +170,9 @@ static int cros_ec_regulator_init_info(struct device *dev,
 	data->voltages_mV =
 		devm_kmemdup(dev, resp.voltages_mv,
 			     sizeof(u16) * data->num_voltages, GFP_KERNEL);
+	if (!data->voltages_mV)
+		return -ENOMEM;
+
 	data->desc.n_voltages = data->num_voltages;
 
 	/* Make sure the returned name is always a valid string */
-- 
GitLab


From e0f49d270d9d04beec113aa7cfacac6bddcb5765 Mon Sep 17 00:00:00 2001
From: Markus Elfring <elfring@users.sourceforge.net>
Date: Sat, 13 Jun 2020 19:12:24 +0200
Subject: [PATCH 0018/1341] ext4: delete unnecessary checks before brelse()

The brelse() function tests whether its argument is NULL
and then returns immediately.
Thus remove the tests which are not needed around the shown calls.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/0d713702-072f-a89c-20ec-ca70aa83a432@web.de
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/extents.c | 6 ++----
 fs/ext4/xattr.c   | 3 +--
 2 files changed, 3 insertions(+), 6 deletions(-)

diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 1106ee17aa217..4af3f36c8351d 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -693,10 +693,8 @@ void ext4_ext_drop_refs(struct ext4_ext_path *path)
 		return;
 	depth = path->p_depth;
 	for (i = 0; i <= depth; i++, path++) {
-		if (path->p_bh) {
-			brelse(path->p_bh);
-			path->p_bh = NULL;
-		}
+		brelse(path->p_bh);
+		path->p_bh = NULL;
 	}
 }
 
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 7d2f6576d9544..cba4b877c606b 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -1356,8 +1356,7 @@ static int ext4_xattr_inode_write(handle_t *handle, struct inode *ea_inode,
 
 	block = 0;
 	while (wsize < bufsize) {
-		if (bh != NULL)
-			brelse(bh);
+		brelse(bh);
 		csize = (bufsize - wsize) > blocksize ? blocksize :
 								bufsize - wsize;
 		bh = ext4_getblk(handle, ea_inode, block, 0);
-- 
GitLab


From e030a28810daf48b43ef6e92fa502ae410b12c8c Mon Sep 17 00:00:00 2001
From: Dio Putra <dioput12@gmail.com>
Date: Sun, 14 Jun 2020 11:45:44 +0700
Subject: [PATCH 0019/1341] ext4: fix coding style in file.c

Fixed a few coding style issues in file.c

Signed-off-by: Dio Putra <dioput12@gmail.com>
Link: https://lore.kernel.org/r/239fcd8f-d33f-8621-9e82-0416dd3f9c94@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/file.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 2a01e31a032c4..453cafecf5cc0 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -145,8 +145,7 @@ static int ext4_release_file(struct inode *inode, struct file *filp)
 	/* if we are the last writer on the inode, drop the block reservation */
 	if ((filp->f_mode & FMODE_WRITE) &&
 			(atomic_read(&inode->i_writecount) == 1) &&
-		        !EXT4_I(inode)->i_reserved_data_blocks)
-	{
+			!EXT4_I(inode)->i_reserved_data_blocks) {
 		down_write(&EXT4_I(inode)->i_data_sem);
 		ext4_discard_preallocations(inode);
 		up_write(&EXT4_I(inode)->i_data_sem);
@@ -810,7 +809,7 @@ static int ext4_sample_last_mounted(struct super_block *sb,
 	return err;
 }
 
-static int ext4_file_open(struct inode * inode, struct file * filp)
+static int ext4_file_open(struct inode *inode, struct file *filp)
 {
 	int ret;
 
-- 
GitLab


From 24dc9864914eb5813173cfa53313fcd02e4aea7d Mon Sep 17 00:00:00 2001
From: Lukas Czerner <lczerner@redhat.com>
Date: Wed, 17 Jun 2020 11:25:49 +0200
Subject: [PATCH 0020/1341] jbd2: make sure jh have b_transaction set in
 refile/unfile_buffer

Callers of __jbd2_journal_unfile_buffer() and
__jbd2_journal_refile_buffer() assume that the b_transaction is set. In
fact if it's not, we can end up with journal_head refcounting errors
leading to crash much later that might be very hard to track down. Add
asserts to make sure that is the case.

We also make sure that b_next_transaction is NULL in
__jbd2_journal_unfile_buffer() since the callers expect that as well and
we should not get into that stage in this state anyway, leading to
problems later on if we do.

Tested with fstests.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200617092549.6712-1-lczerner@redhat.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/jbd2/transaction.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index e91aad3637a23..e65e0aca28261 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -2026,6 +2026,9 @@ static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh)
  */
 static void __jbd2_journal_unfile_buffer(struct journal_head *jh)
 {
+	J_ASSERT_JH(jh, jh->b_transaction != NULL);
+	J_ASSERT_JH(jh, jh->b_next_transaction == NULL);
+
 	__jbd2_journal_temp_unlink_buffer(jh);
 	jh->b_transaction = NULL;
 }
@@ -2572,6 +2575,13 @@ bool __jbd2_journal_refile_buffer(struct journal_head *jh)
 
 	was_dirty = test_clear_buffer_jbddirty(bh);
 	__jbd2_journal_temp_unlink_buffer(jh);
+
+	/*
+	 * b_transaction must be set, otherwise the new b_transaction won't
+	 * be holding jh reference
+	 */
+	J_ASSERT_JH(jh, jh->b_transaction != NULL);
+
 	/*
 	 * We set b_transaction here because b_next_transaction will inherit
 	 * our jh reference and thus __jbd2_journal_file_buffer() must not
-- 
GitLab


From 5872331b3d91820e14716632ebb56b1399b34fe1 Mon Sep 17 00:00:00 2001
From: Eric Sandeen <sandeen@redhat.com>
Date: Wed, 17 Jun 2020 14:19:04 -0500
Subject: [PATCH 0021/1341] ext4: fix potential negative array index in
 do_split()

If for any reason a directory passed to do_split() does not have enough
active entries to exceed half the size of the block, we can end up
iterating over all "count" entries without finding a split point.

In this case, count == move, and split will be zero, and we will
attempt a negative index into map[].

Guard against this by detecting this case, and falling back to
split-to-half-of-count instead; in this case we will still have
plenty of space (> half blocksize) in each split block.

Fixes: ef2b02d3e617 ("ext34: ensure do_split leaves enough free space in both blocks")
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/f53e246b-647c-64bb-16ec-135383c70ad7@redhat.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/namei.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 56738b538ddf4..ef606301a1065 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1858,7 +1858,7 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 			     blocksize, hinfo, map);
 	map -= count;
 	dx_sort_map(map, count);
-	/* Split the existing block in the middle, size-wise */
+	/* Ensure that neither split block is over half full */
 	size = 0;
 	move = 0;
 	for (i = count-1; i >= 0; i--) {
@@ -1868,8 +1868,18 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 		size += map[i].size;
 		move++;
 	}
-	/* map index at which we will split */
-	split = count - move;
+	/*
+	 * map index at which we will split
+	 *
+	 * If the sum of active entries didn't exceed half the block size, just
+	 * split it in half by count; each resulting block will have at least
+	 * half the space free.
+	 */
+	if (i > 0)
+		split = count - move;
+	else
+		split = count/2;
+
 	hash2 = map[split].hash;
 	continued = hash2 == map[split - 1].hash;
 	dxtrace(printk(KERN_INFO "Split block %lu at %x, %i/%i\n",
-- 
GitLab


From ef3f5830b859604eda8723c26d90ab23edc027a4 Mon Sep 17 00:00:00 2001
From: "zhangyi (F)" <yi.zhang@huawei.com>
Date: Sat, 20 Jun 2020 14:19:48 +0800
Subject: [PATCH 0022/1341] jbd2: add the missing unlock_buffer() in the error
 path of jbd2_write_superblock()

jbd2_write_superblock() is under the buffer lock of journal superblock
before ending that superblock write, so add a missing unlock_buffer() in
in the error path before submitting buffer.

Fixes: 742b06b5628f ("jbd2: check superblock mapped prior to committing")
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20200620061948.2049579-1-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/jbd2/journal.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index e4944436e733d..5493a0da23ddd 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1367,8 +1367,10 @@ static int jbd2_write_superblock(journal_t *journal, int write_flags)
 	int ret;
 
 	/* Buffer got discarded which means block device got invalidated */
-	if (!buffer_mapped(bh))
+	if (!buffer_mapped(bh)) {
+		unlock_buffer(bh);
 		return -EIO;
+	}
 
 	trace_jbd2_write_superblock(journal, write_flags);
 	if (!(journal->j_flags & JBD2_BARRIER))
-- 
GitLab


From 9a5d265fed014115f35e598022c956e5d2fb863e Mon Sep 17 00:00:00 2001
From: zhengliang <zhengliang6@huawei.com>
Date: Wed, 1 Jul 2020 16:30:27 +0800
Subject: [PATCH 0023/1341] ext4: lost matching-pair of trace in ext4_truncate

It should call trace exit in all return path for ext4_truncate.

Signed-off-by: zhengliang <zhengliang6@huawei.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200701083027.45996-1-zhengliang6@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/inode.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 10dd470876b30..6187c8880c021 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4163,7 +4163,7 @@ int ext4_truncate(struct inode *inode)
 	trace_ext4_truncate_enter(inode);
 
 	if (!ext4_can_truncate(inode))
-		return 0;
+		goto out_trace;
 
 	if (inode->i_size == 0 && !test_opt(inode->i_sb, NO_AUTO_DA_ALLOC))
 		ext4_set_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE);
@@ -4172,16 +4172,14 @@ int ext4_truncate(struct inode *inode)
 		int has_inline = 1;
 
 		err = ext4_inline_data_truncate(inode, &has_inline);
-		if (err)
-			return err;
-		if (has_inline)
-			return 0;
+		if (err || has_inline)
+			goto out_trace;
 	}
 
 	/* If we zero-out tail of the page, we have to create jinode for jbd2 */
 	if (inode->i_size & (inode->i_sb->s_blocksize - 1)) {
 		if (ext4_inode_attach_jinode(inode) < 0)
-			return 0;
+			goto out_trace;
 	}
 
 	if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
@@ -4190,8 +4188,10 @@ int ext4_truncate(struct inode *inode)
 		credits = ext4_blocks_for_truncate(inode);
 
 	handle = ext4_journal_start(inode, EXT4_HT_TRUNCATE, credits);
-	if (IS_ERR(handle))
-		return PTR_ERR(handle);
+	if (IS_ERR(handle)) {
+		err = PTR_ERR(handle);
+		goto out_trace;
+	}
 
 	if (inode->i_size & (inode->i_sb->s_blocksize - 1))
 		ext4_block_truncate_page(handle, mapping, inode->i_size);
@@ -4242,6 +4242,7 @@ int ext4_truncate(struct inode *inode)
 		err = err2;
 	ext4_journal_stop(handle);
 
+out_trace:
 	trace_ext4_truncate_exit(inode);
 	return err;
 }
-- 
GitLab


From e5f78159d62f79eb7923561275290b7c95e7f03f Mon Sep 17 00:00:00 2001
From: Yi Zhuang <zhuangyi1@huawei.com>
Date: Mon, 29 Jun 2020 20:26:21 +0800
Subject: [PATCH 0024/1341] ext4: lost matching-pair of trace in ext4_unlink

If dquot_initialize() return non-zero and trace of ext4_unlink_enter/exit
enabled then the matching-pair of trace_exit will lost in log.

Signed-off-by: Yi Zhuang <zhuangyi1@huawei.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200629122621.129953-1-zhuangyi1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/namei.c | 38 +++++++++++++++++++++-----------------
 1 file changed, 21 insertions(+), 17 deletions(-)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index ef606301a1065..cb2eb1967e730 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -3203,30 +3203,33 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
 	 * in separate transaction */
 	retval = dquot_initialize(dir);
 	if (retval)
-		return retval;
+		goto out_trace;
 	retval = dquot_initialize(d_inode(dentry));
 	if (retval)
-		return retval;
+		goto out_trace;
 
-	retval = -ENOENT;
 	bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
-	if (IS_ERR(bh))
-		return PTR_ERR(bh);
-	if (!bh)
-		goto end_unlink;
+	if (IS_ERR(bh)) {
+		retval = PTR_ERR(bh);
+		goto out_trace;
+	}
+	if (!bh) {
+		retval = -ENOENT;
+		goto out_trace;
+	}
 
 	inode = d_inode(dentry);
 
-	retval = -EFSCORRUPTED;
-	if (le32_to_cpu(de->inode) != inode->i_ino)
-		goto end_unlink;
+	if (le32_to_cpu(de->inode) != inode->i_ino) {
+		retval = -EFSCORRUPTED;
+		goto out_bh;
+	}
 
 	handle = ext4_journal_start(dir, EXT4_HT_DIR,
 				    EXT4_DATA_TRANS_BLOCKS(dir->i_sb));
 	if (IS_ERR(handle)) {
 		retval = PTR_ERR(handle);
-		handle = NULL;
-		goto end_unlink;
+		goto out_bh;
 	}
 
 	if (IS_DIRSYNC(dir))
@@ -3234,12 +3237,12 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
 
 	retval = ext4_delete_entry(handle, dir, de, bh);
 	if (retval)
-		goto end_unlink;
+		goto out_handle;
 	dir->i_ctime = dir->i_mtime = current_time(dir);
 	ext4_update_dx_flag(dir);
 	retval = ext4_mark_inode_dirty(handle, dir);
 	if (retval)
-		goto end_unlink;
+		goto out_handle;
 	if (inode->i_nlink == 0)
 		ext4_warning_inode(inode, "Deleting file '%.*s' with no links",
 				   dentry->d_name.len, dentry->d_name.name);
@@ -3261,10 +3264,11 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
 		d_invalidate(dentry);
 #endif
 
-end_unlink:
+out_handle:
+	ext4_journal_stop(handle);
+out_bh:
 	brelse(bh);
-	if (handle)
-		ext4_journal_stop(handle);
+out_trace:
 	trace_ext4_unlink_exit(dentry, retval);
 	return retval;
 }
-- 
GitLab


From e65bf6e468c39a60c1dfae439198ad875bb8a870 Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <grandmaster@al2klimov.de>
Date: Mon, 6 Jul 2020 21:03:39 +0200
Subject: [PATCH 0025/1341] ext4: replace HTTP links with HTTPS ones

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
          If both the HTTP and HTTPS versions
          return 200 OK and serve the same content:
            Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Link: https://lore.kernel.org/r/20200706190339.20709-1-grandmaster@al2klimov.de
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 Documentation/filesystems/ext4/about.rst | 2 +-
 fs/ext4/Kconfig                          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/filesystems/ext4/about.rst b/Documentation/filesystems/ext4/about.rst
index 0aadba0522644..cc76b577d2f42 100644
--- a/Documentation/filesystems/ext4/about.rst
+++ b/Documentation/filesystems/ext4/about.rst
@@ -39,6 +39,6 @@ entry.
 Other References
 ----------------
 
-Also see http://www.nongnu.org/ext2-doc/ for quite a collection of
+Also see https://www.nongnu.org/ext2-doc/ for quite a collection of
 information about ext2/3. Here's another old reference:
 http://wiki.osdev.org/Ext2
diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig
index 1afa5a4bcb5f8..619dd35ddd48a 100644
--- a/fs/ext4/Kconfig
+++ b/fs/ext4/Kconfig
@@ -110,7 +110,7 @@ config EXT4_KUNIT_TESTS
 	  This builds the ext4 KUnit tests.
 
 	  KUnit tests run during boot and output the results to the debug log
-	  in TAP format (http://testanything.org/). Only useful for kernel devs
+	  in TAP format (https://testanything.org/). Only useful for kernel devs
 	  running KUnit test harness and are not for inclusion into a production
 	  build.
 
-- 
GitLab


From 0b3171b6d195637f84ddf8b59bae818ea20bc8ac Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Wed, 8 Jul 2020 17:35:16 +0200
Subject: [PATCH 0026/1341] ext4: do not block RWF_NOWAIT dio write on
 unallocated space

Since commit 378f32bab371 ("ext4: introduce direct I/O write using iomap
infrastructure") we don't properly bail out of RWF_NOWAIT direct IO
write if underlying blocks are not allocated. Also
ext4_dio_write_checks() does not honor RWF_NOWAIT when re-acquiring
i_rwsem. Fix both issues.

Fixes: 378f32bab371 ("ext4: introduce direct I/O write using iomap infrastructure")
Cc: stable@kernel.org
Reported-by: Filipe Manana <fdmanana@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200708153516.9507-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/file.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 453cafecf5cc0..7a2720517bbb9 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -427,6 +427,10 @@ static ssize_t ext4_dio_write_checks(struct kiocb *iocb, struct iov_iter *from,
 	 */
 	if (*ilock_shared && (!IS_NOSEC(inode) || *extend ||
 	     !ext4_overwrite_io(inode, offset, count))) {
+		if (iocb->ki_flags & IOCB_NOWAIT) {
+			ret = -EAGAIN;
+			goto out;
+		}
 		inode_unlock_shared(inode);
 		*ilock_shared = false;
 		inode_lock(inode);
-- 
GitLab


From 11215630aada28307ba555a43138db6ac54fa825 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Fri, 10 Jul 2020 16:07:59 +0200
Subject: [PATCH 0027/1341] ext4: don't BUG on inconsistent journal feature

A customer has reported a BUG_ON in ext4_clear_journal_err() hitting
during an LTP testing. Either this has been caused by a test setup
issue where the filesystem was being overwritten while LTP was mounting
it or the journal replay has overwritten the superblock with invalid
data. In either case it is preferable we don't take the machine down
with a BUG_ON. So handle the situation of unexpectedly missing
has_journal feature more gracefully. We issue warning and fail the mount
in the cases where the race window is narrow and the failed check is
most likely a programming error. In cases where fs corruption is more
likely, we do full ext4_error() handling before failing mount / remount.

Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200710140759.18031-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/super.c | 68 ++++++++++++++++++++++++++++++++++---------------
 1 file changed, 47 insertions(+), 21 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 330957ed1f05c..9fdad843b30ef 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -66,10 +66,10 @@ static int ext4_load_journal(struct super_block *, struct ext4_super_block *,
 			     unsigned long journal_devnum);
 static int ext4_show_options(struct seq_file *seq, struct dentry *root);
 static int ext4_commit_super(struct super_block *sb, int sync);
-static void ext4_mark_recovery_complete(struct super_block *sb,
+static int ext4_mark_recovery_complete(struct super_block *sb,
 					struct ext4_super_block *es);
-static void ext4_clear_journal_err(struct super_block *sb,
-				   struct ext4_super_block *es);
+static int ext4_clear_journal_err(struct super_block *sb,
+				  struct ext4_super_block *es);
 static int ext4_sync_fs(struct super_block *sb, int wait);
 static int ext4_remount(struct super_block *sb, int *flags, char *data);
 static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf);
@@ -4770,7 +4770,9 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;
 	if (needs_recovery) {
 		ext4_msg(sb, KERN_INFO, "recovery complete");
-		ext4_mark_recovery_complete(sb, es);
+		err = ext4_mark_recovery_complete(sb, es);
+		if (err)
+			goto failed_mount8;
 	}
 	if (EXT4_SB(sb)->s_journal) {
 		if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA)
@@ -4813,10 +4815,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 		ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
 	goto failed_mount;
 
-#ifdef CONFIG_QUOTA
 failed_mount8:
 	ext4_unregister_sysfs(sb);
-#endif
 failed_mount7:
 	ext4_unregister_li_request(sb);
 failed_mount6:
@@ -4956,7 +4956,8 @@ static journal_t *ext4_get_journal(struct super_block *sb,
 	struct inode *journal_inode;
 	journal_t *journal;
 
-	BUG_ON(!ext4_has_feature_journal(sb));
+	if (WARN_ON_ONCE(!ext4_has_feature_journal(sb)))
+		return NULL;
 
 	journal_inode = ext4_get_journal_inode(sb, journal_inum);
 	if (!journal_inode)
@@ -4986,7 +4987,8 @@ static journal_t *ext4_get_dev_journal(struct super_block *sb,
 	struct ext4_super_block *es;
 	struct block_device *bdev;
 
-	BUG_ON(!ext4_has_feature_journal(sb));
+	if (WARN_ON_ONCE(!ext4_has_feature_journal(sb)))
+		return NULL;
 
 	bdev = ext4_blkdev_get(j_dev, sb);
 	if (bdev == NULL)
@@ -5078,7 +5080,8 @@ static int ext4_load_journal(struct super_block *sb,
 	int err = 0;
 	int really_read_only;
 
-	BUG_ON(!ext4_has_feature_journal(sb));
+	if (WARN_ON_ONCE(!ext4_has_feature_journal(sb)))
+		return -EFSCORRUPTED;
 
 	if (journal_devnum &&
 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {
@@ -5148,7 +5151,12 @@ static int ext4_load_journal(struct super_block *sb,
 	}
 
 	EXT4_SB(sb)->s_journal = journal;
-	ext4_clear_journal_err(sb, es);
+	err = ext4_clear_journal_err(sb, es);
+	if (err) {
+		EXT4_SB(sb)->s_journal = NULL;
+		jbd2_journal_destroy(journal);
+		return err;
+	}
 
 	if (!really_read_only && journal_devnum &&
 	    journal_devnum != le32_to_cpu(es->s_journal_dev)) {
@@ -5244,26 +5252,32 @@ static int ext4_commit_super(struct super_block *sb, int sync)
  * remounting) the filesystem readonly, then we will end up with a
  * consistent fs on disk.  Record that fact.
  */
-static void ext4_mark_recovery_complete(struct super_block *sb,
-					struct ext4_super_block *es)
+static int ext4_mark_recovery_complete(struct super_block *sb,
+				       struct ext4_super_block *es)
 {
+	int err;
 	journal_t *journal = EXT4_SB(sb)->s_journal;
 
 	if (!ext4_has_feature_journal(sb)) {
-		BUG_ON(journal != NULL);
-		return;
+		if (journal != NULL) {
+			ext4_error(sb, "Journal got removed while the fs was "
+				   "mounted!");
+			return -EFSCORRUPTED;
+		}
+		return 0;
 	}
 	jbd2_journal_lock_updates(journal);
-	if (jbd2_journal_flush(journal) < 0)
+	err = jbd2_journal_flush(journal);
+	if (err < 0)
 		goto out;
 
 	if (ext4_has_feature_journal_needs_recovery(sb) && sb_rdonly(sb)) {
 		ext4_clear_feature_journal_needs_recovery(sb);
 		ext4_commit_super(sb, 1);
 	}
-
 out:
 	jbd2_journal_unlock_updates(journal);
+	return err;
 }
 
 /*
@@ -5271,14 +5285,17 @@ static void ext4_mark_recovery_complete(struct super_block *sb,
  * has recorded an error from a previous lifetime, move that error to the
  * main filesystem now.
  */
-static void ext4_clear_journal_err(struct super_block *sb,
+static int ext4_clear_journal_err(struct super_block *sb,
 				   struct ext4_super_block *es)
 {
 	journal_t *journal;
 	int j_errno;
 	const char *errstr;
 
-	BUG_ON(!ext4_has_feature_journal(sb));
+	if (!ext4_has_feature_journal(sb)) {
+		ext4_error(sb, "Journal got removed while the fs was mounted!");
+		return -EFSCORRUPTED;
+	}
 
 	journal = EXT4_SB(sb)->s_journal;
 
@@ -5303,6 +5320,7 @@ static void ext4_clear_journal_err(struct super_block *sb,
 		jbd2_journal_clear_err(journal);
 		jbd2_journal_update_sb_errno(journal);
 	}
+	return 0;
 }
 
 /*
@@ -5573,8 +5591,13 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 			    (sbi->s_mount_state & EXT4_VALID_FS))
 				es->s_state = cpu_to_le16(sbi->s_mount_state);
 
-			if (sbi->s_journal)
+			if (sbi->s_journal) {
+				/*
+				 * We let remount-ro finish even if marking fs
+				 * as clean failed...
+				 */
 				ext4_mark_recovery_complete(sb, es);
+			}
 			if (sbi->s_mmp_tsk)
 				kthread_stop(sbi->s_mmp_tsk);
 		} else {
@@ -5622,8 +5645,11 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 			 * been changed by e2fsck since we originally mounted
 			 * the partition.)
 			 */
-			if (sbi->s_journal)
-				ext4_clear_journal_err(sb, es);
+			if (sbi->s_journal) {
+				err = ext4_clear_journal_err(sb, es);
+				if (err)
+					goto restore_opts;
+			}
 			sbi->s_mount_state = le16_to_cpu(es->s_state);
 
 			err = ext4_setup_super(sb, es, 0);
-- 
GitLab


From 2a12e147da38807f8aab03c92de99a70ab983a96 Mon Sep 17 00:00:00 2001
From: Eric Biggers <ebiggers@google.com>
Date: Sun, 12 Jul 2020 20:10:12 -0700
Subject: [PATCH 0028/1341] ext4: don't hardcode bit values in EXT4_FL_USER_*

Define the EXT4_FL_USER_* constants by OR-ing together the appropriate
flags, rather than hard-coding a numeric value.  This makes it much
easier to see which flags are listed.

No change in the actual values.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200713031012.192440-1-ebiggers@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/ext4.h | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 42f5060f3cdf1..b603a28a36967 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -434,8 +434,34 @@ struct flex_groups {
 #define EXT4_CASEFOLD_FL		0x40000000 /* Casefolded directory */
 #define EXT4_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
 
-#define EXT4_FL_USER_VISIBLE		0x725BDFFF /* User visible flags */
-#define EXT4_FL_USER_MODIFIABLE		0x624BC0FF /* User modifiable flags */
+/* User modifiable flags */
+#define EXT4_FL_USER_MODIFIABLE		(EXT4_SECRM_FL | \
+					 EXT4_UNRM_FL | \
+					 EXT4_COMPR_FL | \
+					 EXT4_SYNC_FL | \
+					 EXT4_IMMUTABLE_FL | \
+					 EXT4_APPEND_FL | \
+					 EXT4_NODUMP_FL | \
+					 EXT4_NOATIME_FL | \
+					 EXT4_JOURNAL_DATA_FL | \
+					 EXT4_NOTAIL_FL | \
+					 EXT4_DIRSYNC_FL | \
+					 EXT4_TOPDIR_FL | \
+					 EXT4_EXTENTS_FL | \
+					 0x00400000 /* EXT4_EOFBLOCKS_FL */ | \
+					 EXT4_DAX_FL | \
+					 EXT4_PROJINHERIT_FL | \
+					 EXT4_CASEFOLD_FL)
+
+/* User visible flags */
+#define EXT4_FL_USER_VISIBLE		(EXT4_FL_USER_MODIFIABLE | \
+					 EXT4_DIRTY_FL | \
+					 EXT4_COMPRBLK_FL | \
+					 EXT4_NOCOMPR_FL | \
+					 EXT4_ENCRYPT_FL | \
+					 EXT4_INDEX_FL | \
+					 EXT4_VERITY_FL | \
+					 EXT4_INLINE_DATA_FL)
 
 /* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */
 #define EXT4_FL_XFLAG_VISIBLE		(EXT4_SYNC_FL | \
-- 
GitLab


From cb29a02d3a9d51c749f556b3bbf6551fbc0454eb Mon Sep 17 00:00:00 2001
From: Eric Biggers <ebiggers@google.com>
Date: Tue, 14 Jul 2020 16:09:09 -0700
Subject: [PATCH 0029/1341] ext4: use generic names for generic ioctls

Don't define EXT4_IOC_* aliases to ioctls that already have a generic
FS_IOC_* name.  These aliases are unnecessary, and they make it unclear
which ioctls are ext4-specific and which are generic.

Exception: leave EXT4_IOC_GETVERSION_OLD and EXT4_IOC_SETVERSION_OLD
as-is for now, since renaming them to FS_IOC_GETVERSION and
FS_IOC_SETVERSION would probably make them more likely to be confused
with EXT4_IOC_GETVERSION and EXT4_IOC_SETVERSION which also exist.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200714230909.56349-1-ebiggers@kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 Documentation/admin-guide/ext4.rst | 20 +++++++++----------
 fs/ext4/ext4.h                     | 12 +----------
 fs/ext4/ioctl.c                    | 32 +++++++++++++++---------------
 3 files changed, 27 insertions(+), 37 deletions(-)

diff --git a/Documentation/admin-guide/ext4.rst b/Documentation/admin-guide/ext4.rst
index 9443fcef18760..7fc6a72920c98 100644
--- a/Documentation/admin-guide/ext4.rst
+++ b/Documentation/admin-guide/ext4.rst
@@ -522,21 +522,21 @@ Files in /sys/fs/ext4/<devname>:
 Ioctls
 ======
 
-There is some Ext4 specific functionality which can be accessed by applications
-through the system call interfaces. The list of all Ext4 specific ioctls are
-shown in the table below.
+Ext4 implements various ioctls which can be used by applications to access
+ext4-specific functionality. An incomplete list of these ioctls is shown in the
+table below. This list includes truly ext4-specific ioctls (``EXT4_IOC_*``) as
+well as ioctls that may have been ext4-specific originally but are now supported
+by some other filesystem(s) too (``FS_IOC_*``).
 
-Table of Ext4 specific ioctls
+Table of Ext4 ioctls
 
-  EXT4_IOC_GETFLAGS
+  FS_IOC_GETFLAGS
         Get additional attributes associated with inode.  The ioctl argument is
-        an integer bitfield, with bit values described in ext4.h. This ioctl is
-        an alias for FS_IOC_GETFLAGS.
+        an integer bitfield, with bit values described in ext4.h.
 
-  EXT4_IOC_SETFLAGS
+  FS_IOC_SETFLAGS
         Set additional attributes associated with inode.  The ioctl argument is
-        an integer bitfield, with bit values described in ext4.h. This ioctl is
-        an alias for FS_IOC_SETFLAGS.
+        an integer bitfield, with bit values described in ext4.h.
 
   EXT4_IOC_GETVERSION, EXT4_IOC_GETVERSION_OLD
         Get the inode i_generation number stored for each inode. The
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index b603a28a36967..dd5e6c6454420 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -463,7 +463,7 @@ struct flex_groups {
 					 EXT4_VERITY_FL | \
 					 EXT4_INLINE_DATA_FL)
 
-/* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */
+/* Flags we can manipulate with through FS_IOC_FSSETXATTR */
 #define EXT4_FL_XFLAG_VISIBLE		(EXT4_SYNC_FL | \
 					 EXT4_IMMUTABLE_FL | \
 					 EXT4_APPEND_FL | \
@@ -695,8 +695,6 @@ enum {
 /*
  * ioctl commands
  */
-#define	EXT4_IOC_GETFLAGS		FS_IOC_GETFLAGS
-#define	EXT4_IOC_SETFLAGS		FS_IOC_SETFLAGS
 #define	EXT4_IOC_GETVERSION		_IOR('f', 3, long)
 #define	EXT4_IOC_SETVERSION		_IOW('f', 4, long)
 #define	EXT4_IOC_GETVERSION_OLD		FS_IOC_GETVERSION
@@ -713,17 +711,11 @@ enum {
 #define EXT4_IOC_RESIZE_FS		_IOW('f', 16, __u64)
 #define EXT4_IOC_SWAP_BOOT		_IO('f', 17)
 #define EXT4_IOC_PRECACHE_EXTENTS	_IO('f', 18)
-#define EXT4_IOC_SET_ENCRYPTION_POLICY	FS_IOC_SET_ENCRYPTION_POLICY
-#define EXT4_IOC_GET_ENCRYPTION_PWSALT	FS_IOC_GET_ENCRYPTION_PWSALT
-#define EXT4_IOC_GET_ENCRYPTION_POLICY	FS_IOC_GET_ENCRYPTION_POLICY
 /* ioctl codes 19--39 are reserved for fscrypt */
 #define EXT4_IOC_CLEAR_ES_CACHE		_IO('f', 40)
 #define EXT4_IOC_GETSTATE		_IOW('f', 41, __u32)
 #define EXT4_IOC_GET_ES_CACHE		_IOWR('f', 42, struct fiemap)
 
-#define EXT4_IOC_FSGETXATTR		FS_IOC_FSGETXATTR
-#define EXT4_IOC_FSSETXATTR		FS_IOC_FSSETXATTR
-
 #define EXT4_IOC_SHUTDOWN _IOR ('X', 125, __u32)
 
 /*
@@ -748,8 +740,6 @@ enum {
 /*
  * ioctl commands in 32 bit emulation
  */
-#define EXT4_IOC32_GETFLAGS		FS_IOC32_GETFLAGS
-#define EXT4_IOC32_SETFLAGS		FS_IOC32_SETFLAGS
 #define EXT4_IOC32_GETVERSION		_IOR('f', 3, int)
 #define EXT4_IOC32_SETVERSION		_IOW('f', 4, int)
 #define EXT4_IOC32_GETRSVSZ		_IOR('f', 5, int)
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 999cf6add39c6..6e70a63dcca70 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -819,12 +819,12 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	switch (cmd) {
 	case FS_IOC_GETFSMAP:
 		return ext4_ioc_getfsmap(sb, (void __user *)arg);
-	case EXT4_IOC_GETFLAGS:
+	case FS_IOC_GETFLAGS:
 		flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
 		if (S_ISREG(inode->i_mode))
 			flags &= ~EXT4_PROJINHERIT_FL;
 		return put_user(flags, (int __user *) arg);
-	case EXT4_IOC_SETFLAGS: {
+	case FS_IOC_SETFLAGS: {
 		int err;
 
 		if (!inode_owner_or_capable(inode))
@@ -1129,12 +1129,12 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	case EXT4_IOC_PRECACHE_EXTENTS:
 		return ext4_ext_precache(inode);
 
-	case EXT4_IOC_SET_ENCRYPTION_POLICY:
+	case FS_IOC_SET_ENCRYPTION_POLICY:
 		if (!ext4_has_feature_encrypt(sb))
 			return -EOPNOTSUPP;
 		return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
 
-	case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
+	case FS_IOC_GET_ENCRYPTION_PWSALT: {
 #ifdef CONFIG_FS_ENCRYPTION
 		int err, err2;
 		struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -1174,7 +1174,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		return -EOPNOTSUPP;
 #endif
 	}
-	case EXT4_IOC_GET_ENCRYPTION_POLICY:
+	case FS_IOC_GET_ENCRYPTION_POLICY:
 		if (!ext4_has_feature_encrypt(sb))
 			return -EOPNOTSUPP;
 		return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
@@ -1236,7 +1236,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 	case EXT4_IOC_GET_ES_CACHE:
 		return ext4_ioctl_get_es_cache(filp, arg);
 
-	case EXT4_IOC_FSGETXATTR:
+	case FS_IOC_FSGETXATTR:
 	{
 		struct fsxattr fa;
 
@@ -1247,7 +1247,7 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 			return -EFAULT;
 		return 0;
 	}
-	case EXT4_IOC_FSSETXATTR:
+	case FS_IOC_FSSETXATTR:
 	{
 		struct fsxattr fa, old_fa;
 		int err;
@@ -1313,11 +1313,11 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	/* These are just misnamed, they actually get/put from/to user an int */
 	switch (cmd) {
-	case EXT4_IOC32_GETFLAGS:
-		cmd = EXT4_IOC_GETFLAGS;
+	case FS_IOC32_GETFLAGS:
+		cmd = FS_IOC_GETFLAGS;
 		break;
-	case EXT4_IOC32_SETFLAGS:
-		cmd = EXT4_IOC_SETFLAGS;
+	case FS_IOC32_SETFLAGS:
+		cmd = FS_IOC_SETFLAGS;
 		break;
 	case EXT4_IOC32_GETVERSION:
 		cmd = EXT4_IOC_GETVERSION;
@@ -1361,9 +1361,9 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	case EXT4_IOC_RESIZE_FS:
 	case FITRIM:
 	case EXT4_IOC_PRECACHE_EXTENTS:
-	case EXT4_IOC_SET_ENCRYPTION_POLICY:
-	case EXT4_IOC_GET_ENCRYPTION_PWSALT:
-	case EXT4_IOC_GET_ENCRYPTION_POLICY:
+	case FS_IOC_SET_ENCRYPTION_POLICY:
+	case FS_IOC_GET_ENCRYPTION_PWSALT:
+	case FS_IOC_GET_ENCRYPTION_POLICY:
 	case FS_IOC_GET_ENCRYPTION_POLICY_EX:
 	case FS_IOC_ADD_ENCRYPTION_KEY:
 	case FS_IOC_REMOVE_ENCRYPTION_KEY:
@@ -1377,8 +1377,8 @@ long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	case EXT4_IOC_CLEAR_ES_CACHE:
 	case EXT4_IOC_GETSTATE:
 	case EXT4_IOC_GET_ES_CACHE:
-	case EXT4_IOC_FSGETXATTR:
-	case EXT4_IOC_FSSETXATTR:
+	case FS_IOC_FSGETXATTR:
+	case FS_IOC_FSSETXATTR:
 		break;
 	default:
 		return -ENOIOCTLCMD;
-- 
GitLab


From 3cb77bd241a48c54bca7bd8510516939264944c5 Mon Sep 17 00:00:00 2001
From: brookxu <brookxu.cn@gmail.com>
Date: Wed, 15 Jul 2020 11:00:44 +0800
Subject: [PATCH 0030/1341] ext4: fix spelling typos in
 ext4_mb_initialize_context

Fix spelling typos in ext4_mb_initialize_context.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/883b523c-58ec-7f38-0bb8-cd2ea4393684@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/mballoc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c0a331e2feb02..6dc2c6c535efe 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4399,7 +4399,7 @@ ext4_mb_initialize_context(struct ext4_allocation_context *ac,
 	ac->ac_g_ex = ac->ac_o_ex;
 	ac->ac_flags = ar->flags;
 
-	/* we have to define context: we'll we work with a file or
+	/* we have to define context: we'll work with a file or
 	 * locality group. this is a policy, actually */
 	ext4_mb_group_or_file(ac);
 
-- 
GitLab


From 273108fa5015eeffc4bacfa5ce272af3434b96e4 Mon Sep 17 00:00:00 2001
From: Lukas Czerner <lczerner@redhat.com>
Date: Fri, 17 Jul 2020 11:06:05 +0200
Subject: [PATCH 0031/1341] ext4: handle read only external journal device

Ext4 uses blkdev_get_by_dev() to get the block_device for journal device
which does check to see if the read-only block device was opened
read-only.

As a result ext4 will hapily proceed mounting the file system with
external journal on read-only device. This is bad as we would not be
able to use the journal leading to errors later on.

Instead of simply failing to mount file system in this case, treat it in
a similar way we treat internal journal on read-only device. Allow to
mount with -o noload in read-only mode.

This can be reproduced easily like this:

mke2fs -F -O journal_dev $JOURNAL_DEV 100M
mkfs.$FSTYPE -F -J device=$JOURNAL_DEV $FS_DEV
blockdev --setro $JOURNAL_DEV
mount $FS_DEV $MNT
touch $MNT/file
umount $MNT

leading to error like this

[ 1307.318713] ------------[ cut here ]------------
[ 1307.323362] generic_make_request: Trying to write to read-only block-device dm-2 (partno 0)
[ 1307.331741] WARNING: CPU: 36 PID: 3224 at block/blk-core.c:855 generic_make_request_checks+0x2c3/0x580
[ 1307.341041] Modules linked in: ext4 mbcache jbd2 rfkill intel_rapl_msr intel_rapl_common isst_if_commd
[ 1307.419445] CPU: 36 PID: 3224 Comm: jbd2/dm-2 Tainted: G        W I       5.8.0-rc5 #2
[ 1307.427359] Hardware name: Dell Inc. PowerEdge R740/01KPX8, BIOS 2.3.10 08/15/2019
[ 1307.434932] RIP: 0010:generic_make_request_checks+0x2c3/0x580
[ 1307.440676] Code: 94 03 00 00 48 89 df 48 8d 74 24 08 c6 05 cf 2b 18 01 01 e8 7f a4 ff ff 48 c7 c7 50e
[ 1307.459420] RSP: 0018:ffffc0d70eb5fb48 EFLAGS: 00010286
[ 1307.464646] RAX: 0000000000000000 RBX: ffff9b33b2978300 RCX: 0000000000000000
[ 1307.471780] RDX: ffff9b33e12a81e0 RSI: ffff9b33e1298000 RDI: ffff9b33e1298000
[ 1307.478913] RBP: ffff9b7b9679e0c0 R08: 0000000000000837 R09: 0000000000000024
[ 1307.486044] R10: 0000000000000000 R11: ffffc0d70eb5f9f0 R12: 0000000000000400
[ 1307.493177] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
[ 1307.500308] FS:  0000000000000000(0000) GS:ffff9b33e1280000(0000) knlGS:0000000000000000
[ 1307.508396] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1307.514142] CR2: 000055eaf4109000 CR3: 0000003dee40a006 CR4: 00000000007606e0
[ 1307.521273] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1307.528407] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1307.535538] PKRU: 55555554
[ 1307.538250] Call Trace:
[ 1307.540708]  generic_make_request+0x30/0x340
[ 1307.544985]  submit_bio+0x43/0x190
[ 1307.548393]  ? bio_add_page+0x62/0x90
[ 1307.552068]  submit_bh_wbc+0x16a/0x190
[ 1307.555833]  jbd2_write_superblock+0xec/0x200 [jbd2]
[ 1307.560803]  jbd2_journal_update_sb_log_tail+0x65/0xc0 [jbd2]
[ 1307.566557]  jbd2_journal_commit_transaction+0x2ae/0x1860 [jbd2]
[ 1307.572566]  ? check_preempt_curr+0x7a/0x90
[ 1307.576756]  ? update_curr+0xe1/0x1d0
[ 1307.580421]  ? account_entity_dequeue+0x7b/0xb0
[ 1307.584955]  ? newidle_balance+0x231/0x3d0
[ 1307.589056]  ? __switch_to_asm+0x42/0x70
[ 1307.592986]  ? __switch_to_asm+0x36/0x70
[ 1307.596918]  ? lock_timer_base+0x67/0x80
[ 1307.600851]  kjournald2+0xbd/0x270 [jbd2]
[ 1307.604873]  ? finish_wait+0x80/0x80
[ 1307.608460]  ? commit_timeout+0x10/0x10 [jbd2]
[ 1307.612915]  kthread+0x114/0x130
[ 1307.616152]  ? kthread_park+0x80/0x80
[ 1307.619816]  ret_from_fork+0x22/0x30
[ 1307.623400] ---[ end trace 27490236265b1630 ]---

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/20200717090605.2612-1-lczerner@redhat.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/super.c | 51 ++++++++++++++++++++++++++++++++-----------------
 1 file changed, 33 insertions(+), 18 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9fdad843b30ef..dda967efcbc2c 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5079,6 +5079,7 @@ static int ext4_load_journal(struct super_block *sb,
 	dev_t journal_dev;
 	int err = 0;
 	int really_read_only;
+	int journal_dev_ro;
 
 	if (WARN_ON_ONCE(!ext4_has_feature_journal(sb)))
 		return -EFSCORRUPTED;
@@ -5091,7 +5092,31 @@ static int ext4_load_journal(struct super_block *sb,
 	} else
 		journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev));
 
-	really_read_only = bdev_read_only(sb->s_bdev);
+	if (journal_inum && journal_dev) {
+		ext4_msg(sb, KERN_ERR,
+			 "filesystem has both journal inode and journal device!");
+		return -EINVAL;
+	}
+
+	if (journal_inum) {
+		journal = ext4_get_journal(sb, journal_inum);
+		if (!journal)
+			return -EINVAL;
+	} else {
+		journal = ext4_get_dev_journal(sb, journal_dev);
+		if (!journal)
+			return -EINVAL;
+	}
+
+	journal_dev_ro = bdev_read_only(journal->j_dev);
+	really_read_only = bdev_read_only(sb->s_bdev) | journal_dev_ro;
+
+	if (journal_dev_ro && !sb_rdonly(sb)) {
+		ext4_msg(sb, KERN_ERR,
+			 "journal device read-only, try mounting with '-o ro'");
+		err = -EROFS;
+		goto err_out;
+	}
 
 	/*
 	 * Are we loading a blank journal or performing recovery after a
@@ -5106,27 +5131,14 @@ static int ext4_load_journal(struct super_block *sb,
 				ext4_msg(sb, KERN_ERR, "write access "
 					"unavailable, cannot proceed "
 					"(try mounting with noload)");
-				return -EROFS;
+				err = -EROFS;
+				goto err_out;
 			}
 			ext4_msg(sb, KERN_INFO, "write access will "
 			       "be enabled during recovery");
 		}
 	}
 
-	if (journal_inum && journal_dev) {
-		ext4_msg(sb, KERN_ERR, "filesystem has both journal "
-		       "and inode journals!");
-		return -EINVAL;
-	}
-
-	if (journal_inum) {
-		if (!(journal = ext4_get_journal(sb, journal_inum)))
-			return -EINVAL;
-	} else {
-		if (!(journal = ext4_get_dev_journal(sb, journal_dev)))
-			return -EINVAL;
-	}
-
 	if (!(journal->j_flags & JBD2_BARRIER))
 		ext4_msg(sb, KERN_INFO, "barriers disabled");
 
@@ -5146,8 +5158,7 @@ static int ext4_load_journal(struct super_block *sb,
 
 	if (err) {
 		ext4_msg(sb, KERN_ERR, "error loading journal");
-		jbd2_journal_destroy(journal);
-		return err;
+		goto err_out;
 	}
 
 	EXT4_SB(sb)->s_journal = journal;
@@ -5167,6 +5178,10 @@ static int ext4_load_journal(struct super_block *sb,
 	}
 
 	return 0;
+
+err_out:
+	jbd2_journal_destroy(journal);
+	return err;
 }
 
 static int ext4_commit_super(struct super_block *sb, int sync)
-- 
GitLab


From cfd73237722135807967f389bcbda558a60a30d6 Mon Sep 17 00:00:00 2001
From: Alex Zhuravlev <bzzz@whamcloud.com>
Date: Tue, 21 Apr 2020 10:54:07 +0300
Subject: [PATCH 0032/1341] ext4: add prefetching for block allocation bitmaps

This should significantly improve bitmap loading, especially for flex
groups as it tries to load all bitmaps within a flex.group instead of
one by one synchronously.

Prefetching is done in 8 * flex_bg groups, so it should be 8
read-ahead reads for a single allocating thread. At the end of
allocation the thread waits for read-ahead completion and initializes
buddy information so that read-aheads are not lost in case of memory
pressure.

At cr=0 the number of prefetching IOs is limited per allocation
context to prevent a situation when mballoc loads thousands of bitmaps
looking for a perfect group and ignoring groups with good chunks.

Together with the patch "ext4: limit scanning of uninitialized groups"
the mount time (which includes few tiny allocations) of a 1PB
filesystem is reduced significantly:

               0% full    50%-full unpatched    patched
  mount time       33s                9279s       563s

[ Restructured by tytso; removed the state flags in the allocation
  context, so it can be used to lazily prefetch the allocation bitmaps
  immediately after the file system is mounted.  Skip prefetching
  block groups which are uninitialized.  Finally pass in the
  REQ_RAHEAD flag to the block layer while prefetching. ]

Signed-off-by: Alex Zhuravlev <bzzz@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/balloc.c  |  14 +++--
 fs/ext4/ext4.h    |   8 ++-
 fs/ext4/mballoc.c | 133 +++++++++++++++++++++++++++++++++++++++++++++-
 fs/ext4/sysfs.c   |   4 ++
 4 files changed, 153 insertions(+), 6 deletions(-)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 1ba46d87cdf10..1e2b1b4093aa9 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -413,7 +413,8 @@ static int ext4_validate_block_bitmap(struct super_block *sb,
  * Return buffer_head on success or an ERR_PTR in case of failure.
  */
 struct buffer_head *
-ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group)
+ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group,
+			      bool ignore_locked)
 {
 	struct ext4_group_desc *desc;
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
@@ -441,6 +442,12 @@ ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group)
 		return ERR_PTR(-ENOMEM);
 	}
 
+	if (ignore_locked && buffer_locked(bh)) {
+		/* buffer under IO already, return if called for prefetching */
+		put_bh(bh);
+		return NULL;
+	}
+
 	if (bitmap_uptodate(bh))
 		goto verify;
 
@@ -490,7 +497,8 @@ ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group)
 	trace_ext4_read_block_bitmap_load(sb, block_group);
 	bh->b_end_io = ext4_end_bitmap_read;
 	get_bh(bh);
-	submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh);
+	submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO |
+		  (ignore_locked ? REQ_RAHEAD : 0), bh);
 	return bh;
 verify:
 	err = ext4_validate_block_bitmap(sb, desc, block_group, bh);
@@ -534,7 +542,7 @@ ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
 	struct buffer_head *bh;
 	int err;
 
-	bh = ext4_read_block_bitmap_nowait(sb, block_group);
+	bh = ext4_read_block_bitmap_nowait(sb, block_group, false);
 	if (IS_ERR(bh))
 		return bh;
 	err = ext4_wait_block_bitmap(sb, block_group, bh);
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index dd5e6c6454420..4fba138b8722d 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1521,6 +1521,8 @@ struct ext4_sb_info {
 	/* where last allocation was done - for stream allocation */
 	unsigned long s_mb_last_group;
 	unsigned long s_mb_last_start;
+	unsigned int s_mb_prefetch;
+	unsigned int s_mb_prefetch_limit;
 
 	/* stats for buddy allocator */
 	atomic_t s_bal_reqs;	/* number of reqs with len > 1 */
@@ -2462,7 +2464,8 @@ extern struct ext4_group_desc * ext4_get_group_desc(struct super_block * sb,
 extern int ext4_should_retry_alloc(struct super_block *sb, int *retries);
 
 extern struct buffer_head *ext4_read_block_bitmap_nowait(struct super_block *sb,
-						ext4_group_t block_group);
+						ext4_group_t block_group,
+						bool ignore_locked);
 extern int ext4_wait_block_bitmap(struct super_block *sb,
 				  ext4_group_t block_group,
 				  struct buffer_head *bh);
@@ -3161,6 +3164,7 @@ struct ext4_group_info {
 	(1 << EXT4_GROUP_INFO_BBITMAP_CORRUPT_BIT)
 #define EXT4_GROUP_INFO_IBITMAP_CORRUPT		\
 	(1 << EXT4_GROUP_INFO_IBITMAP_CORRUPT_BIT)
+#define EXT4_GROUP_INFO_BBITMAP_READ_BIT	4
 
 #define EXT4_MB_GRP_NEED_INIT(grp)	\
 	(test_bit(EXT4_GROUP_INFO_NEED_INIT_BIT, &((grp)->bb_state)))
@@ -3175,6 +3179,8 @@ struct ext4_group_info {
 	(set_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
 #define EXT4_MB_GRP_CLEAR_TRIMMED(grp)	\
 	(clear_bit(EXT4_GROUP_INFO_WAS_TRIMMED_BIT, &((grp)->bb_state)))
+#define EXT4_MB_GRP_TEST_AND_SET_READ(grp)	\
+	(test_and_set_bit(EXT4_GROUP_INFO_BBITMAP_READ_BIT, &((grp)->bb_state)))
 
 #define EXT4_MAX_CONTENTION		8
 #define EXT4_CONTENTION_THRESHOLD	2
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 6dc2c6c535efe..c350ae9cb0d9e 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -922,7 +922,7 @@ static int ext4_mb_init_cache(struct page *page, char *incore, gfp_t gfp)
 			bh[i] = NULL;
 			continue;
 		}
-		bh[i] = ext4_read_block_bitmap_nowait(sb, group);
+		bh[i] = ext4_read_block_bitmap_nowait(sb, group, false);
 		if (IS_ERR(bh[i])) {
 			err = PTR_ERR(bh[i]);
 			bh[i] = NULL;
@@ -2209,12 +2209,93 @@ static int ext4_mb_good_group_nolock(struct ext4_allocation_context *ac,
 	return ret;
 }
 
+/*
+ * Start prefetching @nr block bitmaps starting at @group.
+ * Return the next group which needs to be prefetched.
+ */
+static ext4_group_t
+ext4_mb_prefetch(struct super_block *sb, ext4_group_t group,
+		 unsigned int nr, int *cnt)
+{
+	ext4_group_t ngroups = ext4_get_groups_count(sb);
+	struct buffer_head *bh;
+	struct blk_plug plug;
+
+	blk_start_plug(&plug);
+	while (nr-- > 0) {
+		struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group,
+								  NULL);
+		struct ext4_group_info *grp = ext4_get_group_info(sb, group);
+
+		/*
+		 * Prefetch block groups with free blocks; but don't
+		 * bother if it is marked uninitialized on disk, since
+		 * it won't require I/O to read.  Also only try to
+		 * prefetch once, so we avoid getblk() call, which can
+		 * be expensive.
+		 */
+		if (!EXT4_MB_GRP_TEST_AND_SET_READ(grp) &&
+		    EXT4_MB_GRP_NEED_INIT(grp) &&
+		    ext4_free_group_clusters(sb, gdp) > 0 &&
+		    !(ext4_has_group_desc_csum(sb) &&
+		      (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)))) {
+			bh = ext4_read_block_bitmap_nowait(sb, group, true);
+			if (bh && !IS_ERR(bh)) {
+				if (!buffer_uptodate(bh) && cnt)
+					(*cnt)++;
+				brelse(bh);
+			}
+		}
+		if (++group >= ngroups)
+			group = 0;
+	}
+	blk_finish_plug(&plug);
+	return group;
+}
+
+/*
+ * Prefetching reads the block bitmap into the buffer cache; but we
+ * need to make sure that the buddy bitmap in the page cache has been
+ * initialized.  Note that ext4_mb_init_group() will block if the I/O
+ * is not yet completed, or indeed if it was not initiated by
+ * ext4_mb_prefetch did not start the I/O.
+ *
+ * TODO: We should actually kick off the buddy bitmap setup in a work
+ * queue when the buffer I/O is completed, so that we don't block
+ * waiting for the block allocation bitmap read to finish when
+ * ext4_mb_prefetch_fini is called from ext4_mb_regular_allocator().
+ */
+static void
+ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group,
+		      unsigned int nr)
+{
+	while (nr-- > 0) {
+		struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group,
+								  NULL);
+		struct ext4_group_info *grp = ext4_get_group_info(sb, group);
+
+		if (!group)
+			group = ext4_get_groups_count(sb);
+		group--;
+		grp = ext4_get_group_info(sb, group);
+
+		if (EXT4_MB_GRP_NEED_INIT(grp) &&
+		    ext4_free_group_clusters(sb, gdp) > 0 &&
+		    !(ext4_has_group_desc_csum(sb) &&
+		      (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)))) {
+			if (ext4_mb_init_group(sb, group, GFP_NOFS))
+				break;
+		}
+	}
+}
+
 static noinline_for_stack int
 ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 {
-	ext4_group_t ngroups, group, i;
+	ext4_group_t prefetch_grp = 0, ngroups, group, i;
 	int cr = -1;
 	int err = 0, first_err = 0;
+	unsigned int nr = 0, prefetch_ios = 0;
 	struct ext4_sb_info *sbi;
 	struct super_block *sb;
 	struct ext4_buddy e4b;
@@ -2282,6 +2363,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 		 * from the goal value specified
 		 */
 		group = ac->ac_g_ex.fe_group;
+		prefetch_grp = group;
 
 		for (i = 0; i < ngroups; group++, i++) {
 			int ret = 0;
@@ -2293,6 +2375,29 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 			if (group >= ngroups)
 				group = 0;
 
+			/*
+			 * Batch reads of the block allocation bitmaps
+			 * to get multiple READs in flight; limit
+			 * prefetching at cr=0/1, otherwise mballoc can
+			 * spend a lot of time loading imperfect groups
+			 */
+			if ((prefetch_grp == group) &&
+			    (cr > 1 ||
+			     prefetch_ios < sbi->s_mb_prefetch_limit)) {
+				unsigned int curr_ios = prefetch_ios;
+
+				nr = sbi->s_mb_prefetch;
+				if (ext4_has_feature_flex_bg(sb)) {
+					nr = (group / sbi->s_mb_prefetch) *
+						sbi->s_mb_prefetch;
+					nr = nr + sbi->s_mb_prefetch - group;
+				}
+				prefetch_grp = ext4_mb_prefetch(sb, group,
+							nr, &prefetch_ios);
+				if (prefetch_ios == curr_ios)
+					nr = 0;
+			}
+
 			/* This now checks without needing the buddy page */
 			ret = ext4_mb_good_group_nolock(ac, group, cr);
 			if (ret <= 0) {
@@ -2367,6 +2472,10 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 	mb_debug(sb, "Best len %d, origin len %d, ac_status %u, ac_flags 0x%x, cr %d ret %d\n",
 		 ac->ac_b_ex.fe_len, ac->ac_o_ex.fe_len, ac->ac_status,
 		 ac->ac_flags, cr, err);
+
+	if (nr)
+		ext4_mb_prefetch_fini(sb, prefetch_grp, nr);
+
 	return err;
 }
 
@@ -2613,6 +2722,26 @@ static int ext4_mb_init_backend(struct super_block *sb)
 			goto err_freebuddy;
 	}
 
+	if (ext4_has_feature_flex_bg(sb)) {
+		/* a single flex group is supposed to be read by a single IO */
+		sbi->s_mb_prefetch = 1 << sbi->s_es->s_log_groups_per_flex;
+		sbi->s_mb_prefetch *= 8; /* 8 prefetch IOs in flight at most */
+	} else {
+		sbi->s_mb_prefetch = 32;
+	}
+	if (sbi->s_mb_prefetch > ext4_get_groups_count(sb))
+		sbi->s_mb_prefetch = ext4_get_groups_count(sb);
+	/* now many real IOs to prefetch within a single allocation at cr=0
+	 * given cr=0 is an CPU-related optimization we shouldn't try to
+	 * load too many groups, at some point we should start to use what
+	 * we've got in memory.
+	 * with an average random access time 5ms, it'd take a second to get
+	 * 200 groups (* N with flex_bg), so let's make this limit 4
+	 */
+	sbi->s_mb_prefetch_limit = sbi->s_mb_prefetch * 4;
+	if (sbi->s_mb_prefetch_limit > ext4_get_groups_count(sb))
+		sbi->s_mb_prefetch_limit = ext4_get_groups_count(sb);
+
 	return 0;
 
 err_freebuddy:
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index 6c9fc9e21c138..31e0db726d216 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c
@@ -240,6 +240,8 @@ EXT4_RO_ATTR_ES_STRING(last_error_func, s_last_error_func, 32);
 EXT4_ATTR(first_error_time, 0444, first_error_time);
 EXT4_ATTR(last_error_time, 0444, last_error_time);
 EXT4_ATTR(journal_task, 0444, journal_task);
+EXT4_RW_ATTR_SBI_UI(mb_prefetch, s_mb_prefetch);
+EXT4_RW_ATTR_SBI_UI(mb_prefetch_limit, s_mb_prefetch_limit);
 
 static unsigned int old_bump_val = 128;
 EXT4_ATTR_PTR(max_writeback_mb_bump, 0444, pointer_ui, &old_bump_val);
@@ -283,6 +285,8 @@ static struct attribute *ext4_attrs[] = {
 #ifdef CONFIG_EXT4_DEBUG
 	ATTR_LIST(simulate_fail),
 #endif
+	ATTR_LIST(mb_prefetch),
+	ATTR_LIST(mb_prefetch_limit),
 	NULL,
 };
 ATTRIBUTE_GROUPS(ext4);
-- 
GitLab


From c1d2c7d47e15482bb23cda83a5021e60f624a09c Mon Sep 17 00:00:00 2001
From: Alex Zhuravlev <azhuravlev@whamcloud.com>
Date: Fri, 19 Jun 2020 22:08:56 -0400
Subject: [PATCH 0033/1341] ext4: skip non-loaded groups at cr=0/1 when
 scanning for good groups

cr=0 is supposed to be an optimization to save CPU cycles, but if
buddy data (in memory) is not initialized then all this makes no sense
as we have to do sync IO taking a lot of cycles.  Also, at cr=0
mballoc doesn't choose any available chunk.  cr=1 also skips groups
using heuristic based on avg. fragment size.  It's more useful to skip
such groups and switch to cr=2 where groups will be scanned for
available chunks.  However, we always read the first block group in a
flex_bg so metadata blocks will get read into the first flex_bg if
possible.

Using sparse image and dm-slow virtual device of 120TB was
simulated, then the image was formatted and filled using debugfs to
mark ~85% of available space as busy.  mount process w/o the patch
couldn't complete in half an hour (according to vmstat it would take
~10-11 hours).  With the patch applied mount took ~20 seconds.

Lustre-bug-id: https://jira.whamcloud.com/browse/LU-12988
Signed-off-by: Alex Zhuravlev <azhuravlev@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
---
 fs/ext4/mballoc.c | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index c350ae9cb0d9e..9a07da53ab7b9 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2177,6 +2177,7 @@ static int ext4_mb_good_group_nolock(struct ext4_allocation_context *ac,
 {
 	struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group);
 	struct super_block *sb = ac->ac_sb;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	bool should_lock = ac->ac_flags & EXT4_MB_STRICT_CHECK;
 	ext4_grpblk_t free;
 	int ret = 0;
@@ -2195,7 +2196,25 @@ static int ext4_mb_good_group_nolock(struct ext4_allocation_context *ac,
 
 	/* We only do this if the grp has never been initialized */
 	if (unlikely(EXT4_MB_GRP_NEED_INIT(grp))) {
-		ret = ext4_mb_init_group(ac->ac_sb, group, GFP_NOFS);
+		struct ext4_group_desc *gdp =
+			ext4_get_group_desc(sb, group, NULL);
+		int ret;
+
+		/* cr=0/1 is a very optimistic search to find large
+		 * good chunks almost for free.  If buddy data is not
+		 * ready, then this optimization makes no sense.  But
+		 * we never skip the first block group in a flex_bg,
+		 * since this gets used for metadata block allocation,
+		 * and we want to make sure we locate metadata blocks
+		 * in the first block group in the flex_bg if possible.
+		 */
+		if (cr < 2 &&
+		    (!sbi->s_log_groups_per_flex ||
+		     ((group & ((1 << sbi->s_log_groups_per_flex) - 1)) != 0)) &&
+		    !(ext4_has_group_desc_csum(sb) &&
+		      (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))))
+			return 0;
+		ret = ext4_mb_init_group(sb, group, GFP_NOFS);
 		if (ret)
 			return ret;
 	}
-- 
GitLab


From 8b6ec999b198b59ae61e86e70f5e9df73fe4754f Mon Sep 17 00:00:00 2001
From: Qi Liu <liuqi.16@bytedance.com>
Date: Tue, 21 Jul 2020 18:16:47 +0800
Subject: [PATCH 0034/1341] drm/virtio: fix missing dma_fence_put() in
 virtio_gpu_execbuffer_ioctl()

We should put the reference count of the fence after calling
virtio_gpu_cmd_submit(). So add the missing dma_fence_put().

Fixes: 2cd7b6f08bc4 ("drm/virtio: add in/out fence support for explicit synchronization")
Co-developed-by: Xin He <hexin.op@bytedance.com>
Signed-off-by: Xin He <hexin.op@bytedance.com>
Signed-off-by: Qi Liu <liuqi.16@bytedance.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200721101647.42653-1-hexin.op@bytedance.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/virtio/virtgpu_ioctl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
index 5df722072ba0b..19c5bc01eb790 100644
--- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c
+++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c
@@ -179,6 +179,7 @@ static int virtio_gpu_execbuffer_ioctl(struct drm_device *dev, void *data,
 
 	virtio_gpu_cmd_submit(vgdev, buf, exbuf->size,
 			      vfpriv->ctx_id, buflist, out_fence);
+	dma_fence_put(&out_fence->f);
 	virtio_gpu_notify(vgdev);
 	return 0;
 
-- 
GitLab


From 836b194d65782aaec4485a07d2aab52d3f698505 Mon Sep 17 00:00:00 2001
From: Xin He <hexin.op@bytedance.com>
Date: Wed, 22 Jul 2020 13:18:51 +0800
Subject: [PATCH 0035/1341] drm/virtio: fix memory leak in
 virtio_gpu_cleanup_object()

Before setting shmem->pages to NULL, kfree() should
be called.

Signed-off-by: Xin He <hexin.op@bytedance.com>
Reviewed-by: Qi Liu <liuqi.16@bytedance.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20200722051851.72662-1-hexin.op@bytedance.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 drivers/gpu/drm/virtio/virtgpu_object.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index 6ccbd01cd888c..703b5cd517519 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -79,6 +79,7 @@ void virtio_gpu_cleanup_object(struct virtio_gpu_object *bo)
 			}
 
 			sg_free_table(shmem->pages);
+			kfree(shmem->pages);
 			shmem->pages = NULL;
 			drm_gem_shmem_unpin(&bo->base.base);
 		}
-- 
GitLab


From bc71726c725767205757821df364acff87f92ac5 Mon Sep 17 00:00:00 2001
From: "zhangyi (F)" <yi.zhang@huawei.com>
Date: Sat, 20 Jun 2020 10:54:23 +0800
Subject: [PATCH 0036/1341] ext4: abort the filesystem if failed to async write
 metadata buffer

There is a risk of filesystem inconsistency if we failed to async write
back metadata buffer in the background. Because of current buffer's end
io procedure is handled by end_buffer_async_write() in the block layer,
and it only clear the buffer's uptodate flag and mark the write_io_error
flag, so ext4 cannot detect such failure immediately. In most cases of
getting metadata buffer (e.g. ext4_read_inode_bitmap()), although the
buffer's data is actually uptodate, it may still read data from disk
because the buffer's uptodate flag has been cleared. Finally, it may
lead to on-disk filesystem inconsistency if reading old data from the
disk successfully and write them out again.

This patch detect bdev mapping->wb_err when getting journal's write
access and mark the filesystem error if bdev's mapping->wb_err was
increased, this could prevent further writing and potential
inconsistency.

Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Suggested-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200620025427.1756360-2-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/ext4.h      |  3 +++
 fs/ext4/ext4_jbd2.c | 25 +++++++++++++++++++++++++
 fs/ext4/super.c     | 17 +++++++++++++++++
 3 files changed, 45 insertions(+)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 4fba138b8722d..26ae31a994a20 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1603,6 +1603,9 @@ struct ext4_sb_info {
 #ifdef CONFIG_EXT4_DEBUG
 	unsigned long s_simulate_fail;
 #endif
+	/* Record the errseq of the backing block device */
+	errseq_t s_bdev_wb_err;
+	spinlock_t s_bdev_wb_lock;
 };
 
 static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c
index 0c76cdd44d90d..760b9ee49dc00 100644
--- a/fs/ext4/ext4_jbd2.c
+++ b/fs/ext4/ext4_jbd2.c
@@ -195,6 +195,28 @@ static void ext4_journal_abort_handle(const char *caller, unsigned int line,
 	jbd2_journal_abort_handle(handle);
 }
 
+static void ext4_check_bdev_write_error(struct super_block *sb)
+{
+	struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	int err;
+
+	/*
+	 * If the block device has write error flag, it may have failed to
+	 * async write out metadata buffers in the background. In this case,
+	 * we could read old data from disk and write it out again, which
+	 * may lead to on-disk filesystem inconsistency.
+	 */
+	if (errseq_check(&mapping->wb_err, READ_ONCE(sbi->s_bdev_wb_err))) {
+		spin_lock(&sbi->s_bdev_wb_lock);
+		err = errseq_check_and_advance(&mapping->wb_err, &sbi->s_bdev_wb_err);
+		spin_unlock(&sbi->s_bdev_wb_lock);
+		if (err)
+			ext4_error_err(sb, -err,
+				       "Error while async write back metadata");
+	}
+}
+
 int __ext4_journal_get_write_access(const char *where, unsigned int line,
 				    handle_t *handle, struct buffer_head *bh)
 {
@@ -202,6 +224,9 @@ int __ext4_journal_get_write_access(const char *where, unsigned int line,
 
 	might_sleep();
 
+	if (bh->b_bdev->bd_super)
+		ext4_check_bdev_write_error(bh->b_bdev->bd_super);
+
 	if (ext4_handle_valid(handle)) {
 		err = jbd2_journal_get_write_access(handle, bh);
 		if (err)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index dda967efcbc2c..c77b10257b36a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4765,6 +4765,15 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	}
 #endif  /* CONFIG_QUOTA */
 
+	/*
+	 * Save the original bdev mapping's wb_err value which could be
+	 * used to detect the metadata async write error.
+	 */
+	spin_lock_init(&sbi->s_bdev_wb_lock);
+	if (!sb_rdonly(sb))
+		errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err,
+					 &sbi->s_bdev_wb_err);
+	sb->s_bdev->bd_super = sb;
 	EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS;
 	ext4_orphan_cleanup(sb, es);
 	EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS;
@@ -5654,6 +5663,14 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 				goto restore_opts;
 			}
 
+			/*
+			 * Update the original bdev mapping's wb_err value
+			 * which could be used to detect the metadata async
+			 * write error.
+			 */
+			errseq_check_and_advance(&sb->s_bdev->bd_inode->i_mapping->wb_err,
+						 &sbi->s_bdev_wb_err);
+
 			/*
 			 * Mounting a RDONLY partition read-write, so reread
 			 * and store the current valid flag.  (It may have
-- 
GitLab


From c044f3d8360d2ecf831ba2cc9f08cf9fb2c699fb Mon Sep 17 00:00:00 2001
From: "zhangyi (F)" <yi.zhang@huawei.com>
Date: Sat, 20 Jun 2020 10:54:26 +0800
Subject: [PATCH 0037/1341] jbd2: abort journal if free a async write error
 metadata buffer

If we free a metadata buffer which has been failed to async write out
in the background, the jbd2 checkpoint procedure will not detect this
failure in jbd2_log_do_checkpoint(), so it may lead to filesystem
inconsistency after cleanup journal tail. This patch abort the journal
if free a buffer has write_io_error flag to prevent potential further
inconsistency.

Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Link: https://lore.kernel.org/r/20200620025427.1756360-5-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/jbd2/transaction.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index e65e0aca28261..6250c9faa4cbe 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -2120,6 +2120,7 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal,
 {
 	struct buffer_head *head;
 	struct buffer_head *bh;
+	bool has_write_io_error = false;
 	int ret = 0;
 
 	J_ASSERT(PageLocked(page));
@@ -2144,11 +2145,26 @@ int jbd2_journal_try_to_free_buffers(journal_t *journal,
 		jbd2_journal_put_journal_head(jh);
 		if (buffer_jbd(bh))
 			goto busy;
+
+		/*
+		 * If we free a metadata buffer which has been failed to
+		 * write out, the jbd2 checkpoint procedure will not detect
+		 * this failure and may lead to filesystem inconsistency
+		 * after cleanup journal tail.
+		 */
+		if (buffer_write_io_error(bh)) {
+			pr_err("JBD2: Error while async write back metadata bh %llu.",
+			       (unsigned long long)bh->b_blocknr);
+			has_write_io_error = true;
+		}
 	} while ((bh = bh->b_this_page) != head);
 
 	ret = try_to_free_buffers(page);
 
 busy:
+	if (has_write_io_error)
+		jbd2_journal_abort(journal, -EIO);
+
 	return ret;
 }
 
-- 
GitLab


From 529a781ee07aaa58be8164d75ba5998eb7dd216c Mon Sep 17 00:00:00 2001
From: "zhangyi (F)" <yi.zhang@huawei.com>
Date: Sat, 20 Jun 2020 10:54:27 +0800
Subject: [PATCH 0038/1341] jbd2: remove unused parameter in
 jbd2_journal_try_to_free_buffers()

Parameter gfp_mask in jbd2_journal_try_to_free_buffers() is no longer
used after commit <536fc240e7147> ("jbd2: clean up
jbd2_journal_try_to_free_buffers()"), so just remove it.

Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Link: https://lore.kernel.org/r/20200620025427.1756360-6-yi.zhang@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/inode.c       | 2 +-
 fs/ext4/super.c       | 4 ++--
 fs/jbd2/transaction.c | 7 +------
 include/linux/jbd2.h  | 2 +-
 4 files changed, 5 insertions(+), 10 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 6187c8880c021..551a1056870d7 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -3288,7 +3288,7 @@ static int ext4_releasepage(struct page *page, gfp_t wait)
 	if (PageChecked(page))
 		return 0;
 	if (journal)
-		return jbd2_journal_try_to_free_buffers(journal, page, wait);
+		return jbd2_journal_try_to_free_buffers(journal, page);
 	else
 		return try_to_free_buffers(page);
 }
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c77b10257b36a..8c00f0a09f4da 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1288,8 +1288,8 @@ static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
 	if (!page_has_buffers(page))
 		return 0;
 	if (journal)
-		return jbd2_journal_try_to_free_buffers(journal, page,
-						wait & ~__GFP_DIRECT_RECLAIM);
+		return jbd2_journal_try_to_free_buffers(journal, page);
+
 	return try_to_free_buffers(page);
 }
 
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index 6250c9faa4cbe..43985738aa860 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -2081,10 +2081,6 @@ __journal_try_to_free_buffer(journal_t *journal, struct buffer_head *bh)
  * int jbd2_journal_try_to_free_buffers() - try to free page buffers.
  * @journal: journal for operation
  * @page: to try and free
- * @gfp_mask: we use the mask to detect how hard should we try to release
- * buffers. If __GFP_DIRECT_RECLAIM and __GFP_FS is set, we wait for commit
- * code to release the buffers.
- *
  *
  * For all the buffers on this page,
  * if they are fully written out ordered data, move them onto BUF_CLEAN
@@ -2115,8 +2111,7 @@ __journal_try_to_free_buffer(journal_t *journal, struct buffer_head *bh)
  *
  * Return 0 on failure, 1 on success
  */
-int jbd2_journal_try_to_free_buffers(journal_t *journal,
-				struct page *page, gfp_t gfp_mask)
+int jbd2_journal_try_to_free_buffers(journal_t *journal, struct page *page)
 {
 	struct buffer_head *head;
 	struct buffer_head *bh;
diff --git a/include/linux/jbd2.h b/include/linux/jbd2.h
index d56128df2aff9..a756a4cdf9396 100644
--- a/include/linux/jbd2.h
+++ b/include/linux/jbd2.h
@@ -1380,7 +1380,7 @@ extern int	 jbd2_journal_dirty_metadata (handle_t *, struct buffer_head *);
 extern int	 jbd2_journal_forget (handle_t *, struct buffer_head *);
 extern int	 jbd2_journal_invalidatepage(journal_t *,
 				struct page *, unsigned int, unsigned int);
-extern int	 jbd2_journal_try_to_free_buffers(journal_t *, struct page *, gfp_t);
+extern int	 jbd2_journal_try_to_free_buffers(journal_t *journal, struct page *page);
 extern int	 jbd2_journal_stop(handle_t *);
 extern int	 jbd2_journal_flush (journal_t *);
 extern void	 jbd2_journal_lock_updates (journal_t *);
-- 
GitLab


From ab74c7b23f3770935016e3eb3ecdf1e42b73efaa Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Wed, 15 Jul 2020 11:48:55 -0400
Subject: [PATCH 0039/1341] ext4: indicate via a block bitmap read is
 prefetched via a tracepoint

Modify the ext4_read_block_bitmap_load tracepoint so that it tells us
whether a block bitmap is being prefetched.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Artem Blagodarenko <artem.blagodarenko@gmail.com>
---
 fs/ext4/balloc.c            |  2 +-
 include/trace/events/ext4.h | 24 ++++++++++++++++++++----
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 1e2b1b4093aa9..48c3df47748db 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -494,7 +494,7 @@ ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group,
 	 * submit the buffer_head for reading
 	 */
 	set_buffer_new(bh);
-	trace_ext4_read_block_bitmap_load(sb, block_group);
+	trace_ext4_read_block_bitmap_load(sb, block_group, ignore_locked);
 	bh->b_end_io = ext4_end_bitmap_read;
 	get_bh(bh);
 	submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO |
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index cc41d692ae8ed..cbcd2e1a608d5 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -1312,18 +1312,34 @@ DEFINE_EVENT(ext4__bitmap_load, ext4_mb_buddy_bitmap_load,
 	TP_ARGS(sb, group)
 );
 
-DEFINE_EVENT(ext4__bitmap_load, ext4_read_block_bitmap_load,
+DEFINE_EVENT(ext4__bitmap_load, ext4_load_inode_bitmap,
 
 	TP_PROTO(struct super_block *sb, unsigned long group),
 
 	TP_ARGS(sb, group)
 );
 
-DEFINE_EVENT(ext4__bitmap_load, ext4_load_inode_bitmap,
+TRACE_EVENT(ext4_read_block_bitmap_load,
+	TP_PROTO(struct super_block *sb, unsigned long group, bool prefetch),
 
-	TP_PROTO(struct super_block *sb, unsigned long group),
+	TP_ARGS(sb, group, prefetch),
 
-	TP_ARGS(sb, group)
+	TP_STRUCT__entry(
+		__field(	dev_t,	dev			)
+		__field(	__u32,	group			)
+		__field(	bool,	prefetch		)
+
+	),
+
+	TP_fast_assign(
+		__entry->dev	= sb->s_dev;
+		__entry->group	= group;
+		__entry->prefetch = prefetch;
+	),
+
+	TP_printk("dev %d,%d group %u prefetch %d",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->group, __entry->prefetch)
 );
 
 TRACE_EVENT(ext4_direct_IO_enter,
-- 
GitLab


From 3d392b2676bf3199863a1e5efb2c087ad9d442a4 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Fri, 17 Jul 2020 00:14:40 -0400
Subject: [PATCH 0040/1341] ext4: add prefetch_block_bitmaps mount option

For file systems where we can afford to keep the buddy bitmaps cached,
we can speed up initial writes to large file systems by starting to
load the block allocation bitmaps as soon as the file system is
mounted.  This won't work well for _super_ large file systems, or
memory constrained systems, so we only enable this when it is
requested via a mount option.

Addresses-Google-Bug: 159488342
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
---
 fs/ext4/ext4.h              | 15 +++++++++-
 fs/ext4/mballoc.c           | 10 +++----
 fs/ext4/super.c             | 57 ++++++++++++++++++++++++++-----------
 include/trace/events/ext4.h | 44 ++++++++++++++++++++++++++++
 4 files changed, 103 insertions(+), 23 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 26ae31a994a20..e5f0c66a61564 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1188,6 +1188,7 @@ struct ext4_inode_info {
 #define EXT4_MOUNT_JOURNAL_CHECKSUM	0x800000 /* Journal checksums */
 #define EXT4_MOUNT_JOURNAL_ASYNC_COMMIT	0x1000000 /* Journal Async Commit */
 #define EXT4_MOUNT_WARN_ON_ERROR	0x2000000 /* Trigger WARN_ON on error */
+#define EXT4_MOUNT_PREFETCH_BLOCK_BITMAPS 0x4000000
 #define EXT4_MOUNT_DELALLOC		0x8000000 /* Delalloc support */
 #define EXT4_MOUNT_DATA_ERR_ABORT	0x10000000 /* Abort on file data write */
 #define EXT4_MOUNT_BLOCK_VALIDITY	0x20000000 /* Block validity checking */
@@ -2334,9 +2335,15 @@ struct ext4_lazy_init {
 	struct mutex		li_list_mtx;
 };
 
+enum ext4_li_mode {
+	EXT4_LI_MODE_PREFETCH_BBITMAP,
+	EXT4_LI_MODE_ITABLE,
+};
+
 struct ext4_li_request {
 	struct super_block	*lr_super;
-	struct ext4_sb_info	*lr_sbi;
+	enum ext4_li_mode	lr_mode;
+	ext4_group_t		lr_first_not_zeroed;
 	ext4_group_t		lr_next_group;
 	struct list_head	lr_request;
 	unsigned long		lr_next_sched;
@@ -2676,6 +2683,12 @@ extern int ext4_mb_reserve_blocks(struct super_block *, int);
 extern void ext4_discard_preallocations(struct inode *);
 extern int __init ext4_init_mballoc(void);
 extern void ext4_exit_mballoc(void);
+extern ext4_group_t ext4_mb_prefetch(struct super_block *sb,
+				     ext4_group_t group,
+				     unsigned int nr, int *cnt);
+extern void ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group,
+				  unsigned int nr);
+
 extern void ext4_free_blocks(handle_t *handle, struct inode *inode,
 			     struct buffer_head *bh, ext4_fsblk_t block,
 			     unsigned long count, int flags);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 9a07da53ab7b9..8ecd49dd39061 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2232,9 +2232,8 @@ static int ext4_mb_good_group_nolock(struct ext4_allocation_context *ac,
  * Start prefetching @nr block bitmaps starting at @group.
  * Return the next group which needs to be prefetched.
  */
-static ext4_group_t
-ext4_mb_prefetch(struct super_block *sb, ext4_group_t group,
-		 unsigned int nr, int *cnt)
+ext4_group_t ext4_mb_prefetch(struct super_block *sb, ext4_group_t group,
+			      unsigned int nr, int *cnt)
 {
 	ext4_group_t ngroups = ext4_get_groups_count(sb);
 	struct buffer_head *bh;
@@ -2284,9 +2283,8 @@ ext4_mb_prefetch(struct super_block *sb, ext4_group_t group,
  * waiting for the block allocation bitmap read to finish when
  * ext4_mb_prefetch_fini is called from ext4_mb_regular_allocator().
  */
-static void
-ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group,
-		      unsigned int nr)
+void ext4_mb_prefetch_fini(struct super_block *sb, ext4_group_t group,
+			   unsigned int nr)
 {
 	while (nr-- > 0) {
 		struct ext4_group_desc *gdp = ext4_get_group_desc(sb, group,
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 8c00f0a09f4da..1cbe3f248faf1 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1521,6 +1521,7 @@ enum {
 	Opt_dioread_nolock, Opt_dioread_lock,
 	Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable,
 	Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache,
+	Opt_prefetch_block_bitmaps,
 };
 
 static const match_table_t tokens = {
@@ -1612,6 +1613,7 @@ static const match_table_t tokens = {
 	{Opt_test_dummy_encryption, "test_dummy_encryption"},
 	{Opt_nombcache, "nombcache"},
 	{Opt_nombcache, "no_mbcache"},	/* for backward compatibility */
+	{Opt_prefetch_block_bitmaps, "prefetch_block_bitmaps"},
 	{Opt_removed, "check=none"},	/* mount option from ext2/3 */
 	{Opt_removed, "nocheck"},	/* mount option from ext2/3 */
 	{Opt_removed, "reservation"},	/* mount option from ext2/3 */
@@ -1829,6 +1831,8 @@ static const struct mount_opts {
 	{Opt_max_dir_size_kb, 0, MOPT_GTE0},
 	{Opt_test_dummy_encryption, 0, MOPT_STRING},
 	{Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET},
+	{Opt_prefetch_block_bitmaps, EXT4_MOUNT_PREFETCH_BLOCK_BITMAPS,
+	 MOPT_SET},
 	{Opt_err, 0, 0}
 };
 
@@ -3201,15 +3205,34 @@ static void print_daily_error_info(struct timer_list *t)
 static int ext4_run_li_request(struct ext4_li_request *elr)
 {
 	struct ext4_group_desc *gdp = NULL;
-	ext4_group_t group, ngroups;
-	struct super_block *sb;
+	struct super_block *sb = elr->lr_super;
+	ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count;
+	ext4_group_t group = elr->lr_next_group;
 	unsigned long timeout = 0;
+	unsigned int prefetch_ios = 0;
 	int ret = 0;
 
-	sb = elr->lr_super;
-	ngroups = EXT4_SB(sb)->s_groups_count;
+	if (elr->lr_mode == EXT4_LI_MODE_PREFETCH_BBITMAP) {
+		elr->lr_next_group = ext4_mb_prefetch(sb, group,
+				EXT4_SB(sb)->s_mb_prefetch, &prefetch_ios);
+		if (prefetch_ios)
+			ext4_mb_prefetch_fini(sb, elr->lr_next_group,
+					      prefetch_ios);
+		trace_ext4_prefetch_bitmaps(sb, group, elr->lr_next_group,
+					    prefetch_ios);
+		if (group >= elr->lr_next_group) {
+			ret = 1;
+			if (elr->lr_first_not_zeroed != ngroups &&
+			    !sb_rdonly(sb) && test_opt(sb, INIT_INODE_TABLE)) {
+				elr->lr_next_group = elr->lr_first_not_zeroed;
+				elr->lr_mode = EXT4_LI_MODE_ITABLE;
+				ret = 0;
+			}
+		}
+		return ret;
+	}
 
-	for (group = elr->lr_next_group; group < ngroups; group++) {
+	for (; group < ngroups; group++) {
 		gdp = ext4_get_group_desc(sb, group, NULL);
 		if (!gdp) {
 			ret = 1;
@@ -3227,9 +3250,10 @@ static int ext4_run_li_request(struct ext4_li_request *elr)
 		timeout = jiffies;
 		ret = ext4_init_inode_table(sb, group,
 					    elr->lr_timeout ? 0 : 1);
+		trace_ext4_lazy_itable_init(sb, group);
 		if (elr->lr_timeout == 0) {
 			timeout = (jiffies - timeout) *
-				  elr->lr_sbi->s_li_wait_mult;
+				EXT4_SB(elr->lr_super)->s_li_wait_mult;
 			elr->lr_timeout = timeout;
 		}
 		elr->lr_next_sched = jiffies + elr->lr_timeout;
@@ -3244,15 +3268,11 @@ static int ext4_run_li_request(struct ext4_li_request *elr)
  */
 static void ext4_remove_li_request(struct ext4_li_request *elr)
 {
-	struct ext4_sb_info *sbi;
-
 	if (!elr)
 		return;
 
-	sbi = elr->lr_sbi;
-
 	list_del(&elr->lr_request);
-	sbi->s_li_request = NULL;
+	EXT4_SB(elr->lr_super)->s_li_request = NULL;
 	kfree(elr);
 }
 
@@ -3461,7 +3481,6 @@ static int ext4_li_info_new(void)
 static struct ext4_li_request *ext4_li_request_new(struct super_block *sb,
 					    ext4_group_t start)
 {
-	struct ext4_sb_info *sbi = EXT4_SB(sb);
 	struct ext4_li_request *elr;
 
 	elr = kzalloc(sizeof(*elr), GFP_KERNEL);
@@ -3469,8 +3488,13 @@ static struct ext4_li_request *ext4_li_request_new(struct super_block *sb,
 		return NULL;
 
 	elr->lr_super = sb;
-	elr->lr_sbi = sbi;
-	elr->lr_next_group = start;
+	elr->lr_first_not_zeroed = start;
+	if (test_opt(sb, PREFETCH_BLOCK_BITMAPS))
+		elr->lr_mode = EXT4_LI_MODE_PREFETCH_BBITMAP;
+	else {
+		elr->lr_mode = EXT4_LI_MODE_ITABLE;
+		elr->lr_next_group = start;
+	}
 
 	/*
 	 * Randomize first schedule time of the request to
@@ -3500,8 +3524,9 @@ int ext4_register_li_request(struct super_block *sb,
 		goto out;
 	}
 
-	if (first_not_zeroed == ngroups || sb_rdonly(sb) ||
-	    !test_opt(sb, INIT_INODE_TABLE))
+	if (!test_opt(sb, PREFETCH_BLOCK_BITMAPS) &&
+	    (first_not_zeroed == ngroups || sb_rdonly(sb) ||
+	     !test_opt(sb, INIT_INODE_TABLE)))
 		goto out;
 
 	elr = ext4_li_request_new(sb, first_not_zeroed);
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index cbcd2e1a608d5..8008d2e116b90 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -2742,6 +2742,50 @@ TRACE_EVENT(ext4_error,
 		  __entry->function, __entry->line)
 );
 
+TRACE_EVENT(ext4_prefetch_bitmaps,
+	    TP_PROTO(struct super_block *sb, ext4_group_t group,
+		     ext4_group_t next, unsigned int prefetch_ios),
+
+	TP_ARGS(sb, group, next, prefetch_ios),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,	dev			)
+		__field(	__u32,	group			)
+		__field(	__u32,	next			)
+		__field(	__u32,	ios			)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= sb->s_dev;
+		__entry->group	= group;
+		__entry->next	= next;
+		__entry->ios	= prefetch_ios;
+	),
+
+	TP_printk("dev %d,%d group %u next %u ios %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->group, __entry->next, __entry->ios)
+);
+
+TRACE_EVENT(ext4_lazy_itable_init,
+	    TP_PROTO(struct super_block *sb, ext4_group_t group),
+
+	TP_ARGS(sb, group),
+
+	TP_STRUCT__entry(
+		__field(	dev_t,	dev			)
+		__field(	__u32,	group			)
+	),
+
+	TP_fast_assign(
+		__entry->dev	= sb->s_dev;
+		__entry->group	= group;
+	),
+
+	TP_printk("dev %d,%d group %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->group)
+);
+
 #endif /* _TRACE_EXT4_H */
 
 /* This part must be outside protection */
-- 
GitLab


From 60ed633f51d0c675150a117d96a45e78c3613f91 Mon Sep 17 00:00:00 2001
From: Xianting Tian <xianting_tian@126.com>
Date: Sat, 18 Jul 2020 08:57:37 -0400
Subject: [PATCH 0041/1341] jbd2: fix incorrect code style

Remove unnecessary blank.

Signed-off-by: Xianting Tian <xianting_tian@126.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/1595077057-8048-1-git-send-email-xianting_tian@126.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/jbd2/journal.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 5493a0da23ddd..17fdc482f554a 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1285,7 +1285,7 @@ journal_t *jbd2_journal_init_inode(struct inode *inode)
  * superblock as being NULL to prevent the journal destroy from writing
  * back a bogus superblock.
  */
-static void journal_fail_superblock (journal_t *journal)
+static void journal_fail_superblock(journal_t *journal)
 {
 	struct buffer_head *bh = journal->j_sb_buffer;
 	brelse(bh);
@@ -1817,7 +1817,7 @@ int jbd2_journal_destroy(journal_t *journal)
 
 
 /**
- *int jbd2_journal_check_used_features () - Check if features specified are used.
+ *int jbd2_journal_check_used_features() - Check if features specified are used.
  * @journal: Journal to check.
  * @compat: bitmask of compatible features
  * @ro: bitmask of features that force read-only mount
@@ -1827,7 +1827,7 @@ int jbd2_journal_destroy(journal_t *journal)
  * features.  Return true (non-zero) if it does.
  **/
 
-int jbd2_journal_check_used_features (journal_t *journal, unsigned long compat,
+int jbd2_journal_check_used_features(journal_t *journal, unsigned long compat,
 				 unsigned long ro, unsigned long incompat)
 {
 	journal_superblock_t *sb;
@@ -1862,7 +1862,7 @@ int jbd2_journal_check_used_features (journal_t *journal, unsigned long compat,
  * all of a given set of features on this journal.  Return true
  * (non-zero) if it can. */
 
-int jbd2_journal_check_available_features (journal_t *journal, unsigned long compat,
+int jbd2_journal_check_available_features(journal_t *journal, unsigned long compat,
 				      unsigned long ro, unsigned long incompat)
 {
 	if (!compat && !ro && !incompat)
@@ -1884,7 +1884,7 @@ int jbd2_journal_check_available_features (journal_t *journal, unsigned long com
 }
 
 /**
- * int jbd2_journal_set_features () - Mark a given journal feature in the superblock
+ * int jbd2_journal_set_features() - Mark a given journal feature in the superblock
  * @journal: Journal to act on.
  * @compat: bitmask of compatible features
  * @ro: bitmask of features that force read-only mount
@@ -1895,7 +1895,7 @@ int jbd2_journal_check_available_features (journal_t *journal, unsigned long com
  *
  */
 
-int jbd2_journal_set_features (journal_t *journal, unsigned long compat,
+int jbd2_journal_set_features(journal_t *journal, unsigned long compat,
 			  unsigned long ro, unsigned long incompat)
 {
 #define INCOMPAT_FEATURE_ON(f) \
-- 
GitLab


From f25391ebb475d3ffb3aa61bb90e3594c841749ef Mon Sep 17 00:00:00 2001
From: Lukas Czerner <lczerner@redhat.com>
Date: Thu, 23 Jul 2020 17:05:26 +0200
Subject: [PATCH 0042/1341] ext4: handle option set by mount flags correctly

Currently there is a problem with mount options that can be both set by
vfs using mount flags or by a string parsing in ext4.

i_version/iversion options gets lost after remount, for example

$ mount -o i_version /dev/pmem0 /mnt
$ grep pmem0 /proc/self/mountinfo | grep i_version
310 95 259:0 / /mnt rw,relatime shared:163 - ext4 /dev/pmem0 rw,seclabel,i_version
$ mount -o remount,ro /mnt
$ grep pmem0 /proc/self/mountinfo | grep i_version

nolazytime gets ignored by ext4 on remount, for example

$ mount -o lazytime /dev/pmem0 /mnt
$ grep pmem0 /proc/self/mountinfo | grep lazytime
310 95 259:0 / /mnt rw,relatime shared:163 - ext4 /dev/pmem0 rw,lazytime,seclabel
$ mount -o remount,nolazytime /mnt
$ grep pmem0 /proc/self/mountinfo | grep lazytime
310 95 259:0 / /mnt rw,relatime shared:163 - ext4 /dev/pmem0 rw,lazytime,seclabel

Fix it by applying the SB_LAZYTIME and SB_I_VERSION flags from *flags to
s_flags before we parse the option and use the resulting state of the
same flags in *flags at the end of successful remount.

Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200723150526.19931-1-lczerner@redhat.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/super.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 1cbe3f248faf1..a6de88fc7060a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5512,7 +5512,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 {
 	struct ext4_super_block *es;
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
-	unsigned long old_sb_flags;
+	unsigned long old_sb_flags, vfs_flags;
 	struct ext4_mount_options old_opts;
 	int enable_quota = 0;
 	ext4_group_t g;
@@ -5555,6 +5555,14 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 	if (sbi->s_journal && sbi->s_journal->j_task->io_context)
 		journal_ioprio = sbi->s_journal->j_task->io_context->ioprio;
 
+	/*
+	 * Some options can be enabled by ext4 and/or by VFS mount flag
+	 * either way we need to make sure it matches in both *flags and
+	 * s_flags. Copy those selected flags from *flags to s_flags
+	 */
+	vfs_flags = SB_LAZYTIME | SB_I_VERSION;
+	sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags);
+
 	if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) {
 		err = -EINVAL;
 		goto restore_opts;
@@ -5608,9 +5616,6 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 		set_task_ioprio(sbi->s_journal->j_task, journal_ioprio);
 	}
 
-	if (*flags & SB_LAZYTIME)
-		sb->s_flags |= SB_LAZYTIME;
-
 	if ((bool)(*flags & SB_RDONLY) != sb_rdonly(sb)) {
 		if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) {
 			err = -EROFS;
@@ -5758,7 +5763,13 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 	}
 #endif
 
-	*flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME);
+	/*
+	 * Some options can be enabled by ext4 and/or by VFS mount flag
+	 * either way we need to make sure it matches in both *flags and
+	 * s_flags. Copy those selected flags from s_flags to *flags
+	 */
+	*flags = (*flags & ~vfs_flags) | (sb->s_flags & vfs_flags);
+
 	ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data);
 	kfree(orig_data);
 	return 0;
-- 
GitLab


From 6dbd300129089ad57de20be89ab7c122b36a4c26 Mon Sep 17 00:00:00 2001
From: Shijie Luo <luoshijie1@huawei.com>
Date: Thu, 23 Jul 2020 23:29:54 -0400
Subject: [PATCH 0043/1341] ext4: remove some redundant function declarations

ext4 update feature functions do not exist now, remove these useless
function declarations.

Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200724032954.22097-1-luoshijie1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/ext4.h | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index e5f0c66a61564..32260ceb9cb50 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2959,12 +2959,6 @@ do {									\
 
 #endif
 
-extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb,
-					__u32 compat);
-extern int ext4_update_rocompat_feature(handle_t *handle,
-					struct super_block *sb,	__u32 rocompat);
-extern int ext4_update_incompat_feature(handle_t *handle,
-					struct super_block *sb,	__u32 incompat);
 extern ext4_fsblk_t ext4_block_bitmap(struct super_block *sb,
 				      struct ext4_group_desc *bg);
 extern ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb,
-- 
GitLab


From 1cf006ed19a887c22e085189c8b4a3cbf60d2246 Mon Sep 17 00:00:00 2001
From: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru>
Date: Sat, 25 Jul 2020 12:33:13 +0000
Subject: [PATCH 0044/1341] ext4: export msg_count and warning_count via sysfs

This numbers can be analized by system automation similar to errors_count.
In ideal world it would be nice to have separate counters for different
log-levels, but this makes this patch too intrusive.

Signed-off-by: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru>
Link: https://lore.kernel.org/r/20200725123313.4467-1-dmtrmonakhov@yandex-team.ru
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/ext4.h  |  2 ++
 fs/ext4/super.c | 12 +++++++++---
 fs/ext4/sysfs.c |  7 +++++++
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 32260ceb9cb50..c73b9a1959a98 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1591,6 +1591,8 @@ struct ext4_sb_info {
 	struct ratelimit_state s_err_ratelimit_state;
 	struct ratelimit_state s_warning_ratelimit_state;
 	struct ratelimit_state s_msg_ratelimit_state;
+	atomic_t s_warning_count;
+	atomic_t s_msg_count;
 
 	/* Encryption context for '-o test_dummy_encryption' */
 	struct fscrypt_dummy_context s_dummy_enc_ctx;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index a6de88fc7060a..7deb2b75fcd09 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -744,6 +744,7 @@ void __ext4_msg(struct super_block *sb,
 	struct va_format vaf;
 	va_list args;
 
+	atomic_inc(&EXT4_SB(sb)->s_msg_count);
 	if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs"))
 		return;
 
@@ -754,9 +755,12 @@ void __ext4_msg(struct super_block *sb,
 	va_end(args);
 }
 
-#define ext4_warning_ratelimit(sb)					\
-		___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state),	\
-			     "EXT4-fs warning")
+static int ext4_warning_ratelimit(struct super_block *sb)
+{
+	atomic_inc(&EXT4_SB(sb)->s_warning_count);
+	return ___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state),
+			    "EXT4-fs warning");
+}
 
 void __ext4_warning(struct super_block *sb, const char *function,
 		    unsigned int line, const char *fmt, ...)
@@ -4840,6 +4844,8 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10);
 	ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10);
 	ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10);
+	atomic_set(&sbi->s_warning_count, 0);
+	atomic_set(&sbi->s_msg_count, 0);
 
 	kfree(orig_data);
 	return 0;
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index 31e0db726d216..7fee11cc30e79 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c
@@ -189,6 +189,9 @@ static struct ext4_attr ext4_attr_##_name = {			\
 #define EXT4_RW_ATTR_SBI_UL(_name,_elname)	\
 	EXT4_ATTR_OFFSET(_name, 0644, pointer_ul, ext4_sb_info, _elname)
 
+#define EXT4_RO_ATTR_SBI_ATOMIC(_name,_elname)	\
+	EXT4_ATTR_OFFSET(_name, 0444, pointer_atomic, ext4_sb_info, _elname)
+
 #define EXT4_ATTR_PTR(_name,_mode,_id,_ptr) \
 static struct ext4_attr ext4_attr_##_name = {			\
 	.attr = {.name = __stringify(_name), .mode = _mode },	\
@@ -226,6 +229,8 @@ EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst);
 #ifdef CONFIG_EXT4_DEBUG
 EXT4_RW_ATTR_SBI_UL(simulate_fail, s_simulate_fail);
 #endif
+EXT4_RO_ATTR_SBI_ATOMIC(warning_count, s_warning_count);
+EXT4_RO_ATTR_SBI_ATOMIC(msg_count, s_msg_count);
 EXT4_RO_ATTR_ES_UI(errors_count, s_error_count);
 EXT4_RO_ATTR_ES_U8(first_error_errcode, s_first_error_errcode);
 EXT4_RO_ATTR_ES_U8(last_error_errcode, s_last_error_errcode);
@@ -269,6 +274,8 @@ static struct attribute *ext4_attrs[] = {
 	ATTR_LIST(msg_ratelimit_interval_ms),
 	ATTR_LIST(msg_ratelimit_burst),
 	ATTR_LIST(errors_count),
+	ATTR_LIST(warning_count),
+	ATTR_LIST(msg_count),
 	ATTR_LIST(first_error_ino),
 	ATTR_LIST(last_error_ino),
 	ATTR_LIST(first_error_block),
-- 
GitLab


From 9375ac770cda6bdff829f43868d0ebcaba41f675 Mon Sep 17 00:00:00 2001
From: brookxu <brookxu.cn@gmail.com>
Date: Mon, 27 Jul 2020 09:54:14 +0800
Subject: [PATCH 0045/1341] ext4: delete the invalid BUGON in
 ext4_mb_load_buddy_gfp()

Delete the invalid BUGON in ext4_mb_load_buddy_gfp(), the previous
code has already judged whether page is NULL.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/ad68e8a2-5ec3-5beb-537f-f3e53f55367a@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/mballoc.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 8ecd49dd39061..19101941daddd 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1279,9 +1279,6 @@ ext4_mb_load_buddy_gfp(struct super_block *sb, ext4_group_t group,
 	e4b->bd_buddy_page = page;
 	e4b->bd_buddy = page_address(page) + (poff * sb->s_blocksize);
 
-	BUG_ON(e4b->bd_bitmap_page == NULL);
-	BUG_ON(e4b->bd_buddy_page == NULL);
-
 	return 0;
 
 err:
-- 
GitLab


From d176b1f62f242ab259ff665a26fbac69db1aecba Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Tue, 28 Jul 2020 15:04:32 +0200
Subject: [PATCH 0046/1341] ext4: handle error of ext4_setup_system_zone() on
 remount

ext4_setup_system_zone() can fail. Handle the failure in ext4_remount().

Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200728130437.7804-2-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/super.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 7deb2b75fcd09..6507e30e58b5d 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5747,7 +5747,10 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 		ext4_register_li_request(sb, first_not_zeroed);
 	}
 
-	ext4_setup_system_zone(sb);
+	err = ext4_setup_system_zone(sb);
+	if (err)
+		goto restore_opts;
+
 	if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) {
 		err = ext4_commit_super(sb, 1);
 		if (err)
-- 
GitLab


From bf9a379d0980e7413d94cb18dac73db2bfc5f470 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Tue, 28 Jul 2020 15:04:33 +0200
Subject: [PATCH 0047/1341] ext4: don't allow overlapping system zones

Currently, add_system_zone() just silently merges two added system zones
that overlap. However the overlap should not happen and it generally
suggests that some unrelated metadata overlap which indicates the fs is
corrupted. We should have caught such problems earlier (e.g. in
ext4_check_descriptors()) but add this check as another line of defense.
In later patch we also use this for stricter checking of journal inode
extent tree.

Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200728130437.7804-3-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/block_validity.c | 36 +++++++++++++-----------------------
 1 file changed, 13 insertions(+), 23 deletions(-)

diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index 16e9b2fda03ae..b394a50ebbe30 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -68,7 +68,7 @@ static int add_system_zone(struct ext4_system_blocks *system_blks,
 			   ext4_fsblk_t start_blk,
 			   unsigned int count)
 {
-	struct ext4_system_zone *new_entry = NULL, *entry;
+	struct ext4_system_zone *new_entry, *entry;
 	struct rb_node **n = &system_blks->root.rb_node, *node;
 	struct rb_node *parent = NULL, *new_node = NULL;
 
@@ -79,30 +79,20 @@ static int add_system_zone(struct ext4_system_blocks *system_blks,
 			n = &(*n)->rb_left;
 		else if (start_blk >= (entry->start_blk + entry->count))
 			n = &(*n)->rb_right;
-		else {
-			if (start_blk + count > (entry->start_blk +
-						 entry->count))
-				entry->count = (start_blk + count -
-						entry->start_blk);
-			new_node = *n;
-			new_entry = rb_entry(new_node, struct ext4_system_zone,
-					     node);
-			break;
-		}
+		else	/* Unexpected overlap of system zones. */
+			return -EFSCORRUPTED;
 	}
 
-	if (!new_entry) {
-		new_entry = kmem_cache_alloc(ext4_system_zone_cachep,
-					     GFP_KERNEL);
-		if (!new_entry)
-			return -ENOMEM;
-		new_entry->start_blk = start_blk;
-		new_entry->count = count;
-		new_node = &new_entry->node;
-
-		rb_link_node(new_node, parent, n);
-		rb_insert_color(new_node, &system_blks->root);
-	}
+	new_entry = kmem_cache_alloc(ext4_system_zone_cachep,
+				     GFP_KERNEL);
+	if (!new_entry)
+		return -ENOMEM;
+	new_entry->start_blk = start_blk;
+	new_entry->count = count;
+	new_node = &new_entry->node;
+
+	rb_link_node(new_node, parent, n);
+	rb_insert_color(new_node, &system_blks->root);
 
 	/* Can we merge to the left? */
 	node = rb_prev(new_node);
-- 
GitLab


From ce9f24cccdc019229b70a5c15e2b09ad9c0ab5d1 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Tue, 28 Jul 2020 15:04:34 +0200
Subject: [PATCH 0048/1341] ext4: check journal inode extents more carefully

Currently, system zones just track ranges of block, that are "important"
fs metadata (bitmaps, group descriptors, journal blocks, etc.). This
however complicates how extent tree (or indirect blocks) can be checked
for inodes that actually track such metadata - currently the journal
inode but arguably we should be treating quota files or resize inode
similarly. We cannot run __ext4_ext_check() on such metadata inodes when
loading their extents as that would immediately trigger the validity
checks and so we just hack around that and special-case the journal
inode. This however leads to a situation that a journal inode which has
extent tree of depth at least one can have invalid extent tree that gets
unnoticed until ext4_cache_extents() crashes.

To overcome this limitation, track inode number each system zone belongs
to (0 is used for zones not belonging to any inode). We can then verify
inode number matches the expected one when verifying extent tree and
thus avoid the false errors. With this there's no need to to
special-case journal inode during extent tree checking anymore so remove
it.

Fixes: 0a944e8a6c66 ("ext4: don't perform block validity checks on the journal inode")
Reported-by: Wolfgang Frisch <wolfgang.frisch@suse.com>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200728130437.7804-4-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/block_validity.c | 51 ++++++++++++++++++++--------------------
 fs/ext4/ext4.h           |  6 ++---
 fs/ext4/extents.c        | 16 +++++--------
 fs/ext4/indirect.c       |  6 ++---
 fs/ext4/inode.c          |  5 ++--
 fs/ext4/mballoc.c        |  4 ++--
 6 files changed, 41 insertions(+), 47 deletions(-)

diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index b394a50ebbe30..e830a9d4e10d3 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -24,6 +24,7 @@ struct ext4_system_zone {
 	struct rb_node	node;
 	ext4_fsblk_t	start_blk;
 	unsigned int	count;
+	u32		ino;
 };
 
 static struct kmem_cache *ext4_system_zone_cachep;
@@ -45,7 +46,8 @@ void ext4_exit_system_zone(void)
 static inline int can_merge(struct ext4_system_zone *entry1,
 		     struct ext4_system_zone *entry2)
 {
-	if ((entry1->start_blk + entry1->count) == entry2->start_blk)
+	if ((entry1->start_blk + entry1->count) == entry2->start_blk &&
+	    entry1->ino == entry2->ino)
 		return 1;
 	return 0;
 }
@@ -66,7 +68,7 @@ static void release_system_zone(struct ext4_system_blocks *system_blks)
  */
 static int add_system_zone(struct ext4_system_blocks *system_blks,
 			   ext4_fsblk_t start_blk,
-			   unsigned int count)
+			   unsigned int count, u32 ino)
 {
 	struct ext4_system_zone *new_entry, *entry;
 	struct rb_node **n = &system_blks->root.rb_node, *node;
@@ -89,6 +91,7 @@ static int add_system_zone(struct ext4_system_blocks *system_blks,
 		return -ENOMEM;
 	new_entry->start_blk = start_blk;
 	new_entry->count = count;
+	new_entry->ino = ino;
 	new_node = &new_entry->node;
 
 	rb_link_node(new_node, parent, n);
@@ -149,7 +152,7 @@ static void debug_print_tree(struct ext4_sb_info *sbi)
 static int ext4_data_block_valid_rcu(struct ext4_sb_info *sbi,
 				     struct ext4_system_blocks *system_blks,
 				     ext4_fsblk_t start_blk,
-				     unsigned int count)
+				     unsigned int count, ino_t ino)
 {
 	struct ext4_system_zone *entry;
 	struct rb_node *n;
@@ -170,7 +173,7 @@ static int ext4_data_block_valid_rcu(struct ext4_sb_info *sbi,
 		else if (start_blk >= (entry->start_blk + entry->count))
 			n = n->rb_right;
 		else
-			return 0;
+			return entry->ino == ino;
 	}
 	return 1;
 }
@@ -204,19 +207,18 @@ static int ext4_protect_reserved_inode(struct super_block *sb,
 		if (n == 0) {
 			i++;
 		} else {
-			if (!ext4_data_block_valid_rcu(sbi, system_blks,
-						map.m_pblk, n)) {
-				err = -EFSCORRUPTED;
-				__ext4_error(sb, __func__, __LINE__, -err,
-					     map.m_pblk, "blocks %llu-%llu "
-					     "from inode %u overlap system zone",
-					     map.m_pblk,
-					     map.m_pblk + map.m_len - 1, ino);
+			err = add_system_zone(system_blks, map.m_pblk, n, ino);
+			if (err < 0) {
+				if (err == -EFSCORRUPTED) {
+					__ext4_error(sb, __func__, __LINE__,
+						     -err, map.m_pblk,
+						     "blocks %llu-%llu from inode %u overlap system zone",
+						     map.m_pblk,
+						     map.m_pblk + map.m_len - 1,
+						     ino);
+				}
 				break;
 			}
-			err = add_system_zone(system_blks, map.m_pblk, n);
-			if (err < 0)
-				break;
 			i += n;
 		}
 	}
@@ -270,19 +272,19 @@ int ext4_setup_system_zone(struct super_block *sb)
 		    ((i < 5) || ((i % flex_size) == 0)))
 			add_system_zone(system_blks,
 					ext4_group_first_block_no(sb, i),
-					ext4_bg_num_gdb(sb, i) + 1);
+					ext4_bg_num_gdb(sb, i) + 1, 0);
 		gdp = ext4_get_group_desc(sb, i, NULL);
 		ret = add_system_zone(system_blks,
-				ext4_block_bitmap(sb, gdp), 1);
+				ext4_block_bitmap(sb, gdp), 1, 0);
 		if (ret)
 			goto err;
 		ret = add_system_zone(system_blks,
-				ext4_inode_bitmap(sb, gdp), 1);
+				ext4_inode_bitmap(sb, gdp), 1, 0);
 		if (ret)
 			goto err;
 		ret = add_system_zone(system_blks,
 				ext4_inode_table(sb, gdp),
-				sbi->s_itb_per_group);
+				sbi->s_itb_per_group, 0);
 		if (ret)
 			goto err;
 	}
@@ -331,7 +333,7 @@ void ext4_release_system_zone(struct super_block *sb)
 		call_rcu(&system_blks->rcu, ext4_destroy_system_zone);
 }
 
-int ext4_data_block_valid(struct ext4_sb_info *sbi, ext4_fsblk_t start_blk,
+int ext4_inode_block_valid(struct inode *inode, ext4_fsblk_t start_blk,
 			  unsigned int count)
 {
 	struct ext4_system_blocks *system_blks;
@@ -343,9 +345,9 @@ int ext4_data_block_valid(struct ext4_sb_info *sbi, ext4_fsblk_t start_blk,
 	 * mount option.
 	 */
 	rcu_read_lock();
-	system_blks = rcu_dereference(sbi->system_blks);
-	ret = ext4_data_block_valid_rcu(sbi, system_blks, start_blk,
-					count);
+	system_blks = rcu_dereference(EXT4_SB(inode->i_sb)->system_blks);
+	ret = ext4_data_block_valid_rcu(EXT4_SB(inode->i_sb), system_blks,
+					start_blk, count, inode->i_ino);
 	rcu_read_unlock();
 	return ret;
 }
@@ -364,8 +366,7 @@ int ext4_check_blockref(const char *function, unsigned int line,
 	while (bref < p+max) {
 		blk = le32_to_cpu(*bref++);
 		if (blk &&
-		    unlikely(!ext4_data_block_valid(EXT4_SB(inode->i_sb),
-						    blk, 1))) {
+		    unlikely(!ext4_inode_block_valid(inode, blk, 1))) {
 			ext4_error_inode(inode, function, line, blk,
 					 "invalid block");
 			return -EFSCORRUPTED;
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index c73b9a1959a98..3994f012a9de7 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -3397,9 +3397,9 @@ extern void ext4_release_system_zone(struct super_block *sb);
 extern int ext4_setup_system_zone(struct super_block *sb);
 extern int __init ext4_init_system_zone(void);
 extern void ext4_exit_system_zone(void);
-extern int ext4_data_block_valid(struct ext4_sb_info *sbi,
-				 ext4_fsblk_t start_blk,
-				 unsigned int count);
+extern int ext4_inode_block_valid(struct inode *inode,
+				  ext4_fsblk_t start_blk,
+				  unsigned int count);
 extern int ext4_check_blockref(const char *, unsigned int,
 			       struct inode *, __le32 *, unsigned int);
 
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 4af3f36c8351d..0eea09aa0f267 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -340,7 +340,7 @@ static int ext4_valid_extent(struct inode *inode, struct ext4_extent *ext)
 	 */
 	if (lblock + len <= lblock)
 		return 0;
-	return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, len);
+	return ext4_inode_block_valid(inode, block, len);
 }
 
 static int ext4_valid_extent_idx(struct inode *inode,
@@ -348,7 +348,7 @@ static int ext4_valid_extent_idx(struct inode *inode,
 {
 	ext4_fsblk_t block = ext4_idx_pblock(ext_idx);
 
-	return ext4_data_block_valid(EXT4_SB(inode->i_sb), block, 1);
+	return ext4_inode_block_valid(inode, block, 1);
 }
 
 static int ext4_valid_extent_entries(struct inode *inode,
@@ -507,14 +507,10 @@ __read_extent_tree_block(const char *function, unsigned int line,
 	}
 	if (buffer_verified(bh) && !(flags & EXT4_EX_FORCE_CACHE))
 		return bh;
-	if (!ext4_has_feature_journal(inode->i_sb) ||
-	    (inode->i_ino !=
-	     le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum))) {
-		err = __ext4_ext_check(function, line, inode,
-				       ext_block_hdr(bh), depth, pblk);
-		if (err)
-			goto errout;
-	}
+	err = __ext4_ext_check(function, line, inode,
+			       ext_block_hdr(bh), depth, pblk);
+	if (err)
+		goto errout;
 	set_buffer_verified(bh);
 	/*
 	 * If this is a leaf block, cache all of its entries
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index be2b66eb65f7a..4026418257121 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -858,8 +858,7 @@ static int ext4_clear_blocks(handle_t *handle, struct inode *inode,
 	else if (ext4_should_journal_data(inode))
 		flags |= EXT4_FREE_BLOCKS_FORGET;
 
-	if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), block_to_free,
-				   count)) {
+	if (!ext4_inode_block_valid(inode, block_to_free, count)) {
 		EXT4_ERROR_INODE(inode, "attempt to clear invalid "
 				 "blocks %llu len %lu",
 				 (unsigned long long) block_to_free, count);
@@ -1004,8 +1003,7 @@ static void ext4_free_branches(handle_t *handle, struct inode *inode,
 			if (!nr)
 				continue;		/* A hole */
 
-			if (!ext4_data_block_valid(EXT4_SB(inode->i_sb),
-						   nr, 1)) {
+			if (!ext4_inode_block_valid(inode, nr, 1)) {
 				EXT4_ERROR_INODE(inode,
 						 "invalid indirect mapped "
 						 "block %lu (level %d)",
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 551a1056870d7..0b07576af3bf8 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -394,8 +394,7 @@ static int __check_block_validity(struct inode *inode, const char *func,
 	    (inode->i_ino ==
 	     le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum)))
 		return 0;
-	if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), map->m_pblk,
-				   map->m_len)) {
+	if (!ext4_inode_block_valid(inode, map->m_pblk, map->m_len)) {
 		ext4_error_inode(inode, func, line, map->m_pblk,
 				 "lblock %lu mapped to illegal pblock %llu "
 				 "(length %d)", (unsigned long) map->m_lblk,
@@ -4761,7 +4760,7 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
 
 	ret = 0;
 	if (ei->i_file_acl &&
-	    !ext4_data_block_valid(EXT4_SB(sb), ei->i_file_acl, 1)) {
+	    !ext4_inode_block_valid(inode, ei->i_file_acl, 1)) {
 		ext4_error_inode(inode, function, line, 0,
 				 "iget: bad extended attribute block %llu",
 				 ei->i_file_acl);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 19101941daddd..8b8c84db243a9 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3233,7 +3233,7 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
 	block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
 
 	len = EXT4_C2B(sbi, ac->ac_b_ex.fe_len);
-	if (!ext4_data_block_valid(sbi, block, len)) {
+	if (!ext4_inode_block_valid(ac->ac_inode, block, len)) {
 		ext4_error(sb, "Allocating blocks %llu-%llu which overlap "
 			   "fs metadata", block, block+len);
 		/* File system mounted not to panic on error
@@ -5058,7 +5058,7 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode,
 
 	sbi = EXT4_SB(sb);
 	if (!(flags & EXT4_FREE_BLOCKS_VALIDATED) &&
-	    !ext4_data_block_valid(sbi, block, count)) {
+	    !ext4_inode_block_valid(inode, block, count)) {
 		ext4_error(sb, "Freeing blocks not in datazone - "
 			   "block = %llu, count = %lu", block, count);
 		goto error_return;
-- 
GitLab


From 3f67e7cffa6ee2d49ccb697c569c6d30e6024160 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Tue, 28 Jul 2020 15:04:35 +0200
Subject: [PATCH 0049/1341] ext4: fold ext4_data_block_valid_rcu() into the
 caller

After the previous patch, ext4_data_block_valid_rcu() has a single
caller. Fold it into it.

Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200728130437.7804-5-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/block_validity.c | 69 ++++++++++++++++++----------------------
 1 file changed, 31 insertions(+), 38 deletions(-)

diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index e830a9d4e10d3..9c40214f31f9f 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -144,40 +144,6 @@ static void debug_print_tree(struct ext4_sb_info *sbi)
 	printk(KERN_CONT "\n");
 }
 
-/*
- * Returns 1 if the passed-in block region (start_blk,
- * start_blk+count) is valid; 0 if some part of the block region
- * overlaps with filesystem metadata blocks.
- */
-static int ext4_data_block_valid_rcu(struct ext4_sb_info *sbi,
-				     struct ext4_system_blocks *system_blks,
-				     ext4_fsblk_t start_blk,
-				     unsigned int count, ino_t ino)
-{
-	struct ext4_system_zone *entry;
-	struct rb_node *n;
-
-	if ((start_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) ||
-	    (start_blk + count < start_blk) ||
-	    (start_blk + count > ext4_blocks_count(sbi->s_es)))
-		return 0;
-
-	if (system_blks == NULL)
-		return 1;
-
-	n = system_blks->root.rb_node;
-	while (n) {
-		entry = rb_entry(n, struct ext4_system_zone, node);
-		if (start_blk + count - 1 < entry->start_blk)
-			n = n->rb_left;
-		else if (start_blk >= (entry->start_blk + entry->count))
-			n = n->rb_right;
-		else
-			return entry->ino == ino;
-	}
-	return 1;
-}
-
 static int ext4_protect_reserved_inode(struct super_block *sb,
 				       struct ext4_system_blocks *system_blks,
 				       u32 ino)
@@ -333,11 +299,24 @@ void ext4_release_system_zone(struct super_block *sb)
 		call_rcu(&system_blks->rcu, ext4_destroy_system_zone);
 }
 
+/*
+ * Returns 1 if the passed-in block region (start_blk,
+ * start_blk+count) is valid; 0 if some part of the block region
+ * overlaps with some other filesystem metadata blocks.
+ */
 int ext4_inode_block_valid(struct inode *inode, ext4_fsblk_t start_blk,
 			  unsigned int count)
 {
+	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 	struct ext4_system_blocks *system_blks;
-	int ret;
+	struct ext4_system_zone *entry;
+	struct rb_node *n;
+	int ret = 1;
+
+	if ((start_blk <= le32_to_cpu(sbi->s_es->s_first_data_block)) ||
+	    (start_blk + count < start_blk) ||
+	    (start_blk + count > ext4_blocks_count(sbi->s_es)))
+		return 0;
 
 	/*
 	 * Lock the system zone to prevent it being released concurrently
@@ -345,9 +324,23 @@ int ext4_inode_block_valid(struct inode *inode, ext4_fsblk_t start_blk,
 	 * mount option.
 	 */
 	rcu_read_lock();
-	system_blks = rcu_dereference(EXT4_SB(inode->i_sb)->system_blks);
-	ret = ext4_data_block_valid_rcu(EXT4_SB(inode->i_sb), system_blks,
-					start_blk, count, inode->i_ino);
+	system_blks = rcu_dereference(sbi->system_blks);
+	if (system_blks == NULL)
+		goto out_rcu;
+
+	n = system_blks->root.rb_node;
+	while (n) {
+		entry = rb_entry(n, struct ext4_system_zone, node);
+		if (start_blk + count - 1 < entry->start_blk)
+			n = n->rb_left;
+		else if (start_blk >= (entry->start_blk + entry->count))
+			n = n->rb_right;
+		else {
+			ret = (entry->ino == inode->i_ino);
+			break;
+		}
+	}
+out_rcu:
 	rcu_read_unlock();
 	return ret;
 }
-- 
GitLab


From e7bfb5c9bb3d63cb2abb3ceaf1a429d9f02f942d Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Tue, 28 Jul 2020 15:04:36 +0200
Subject: [PATCH 0050/1341] ext4: handle add_system_zone() failure in
 ext4_setup_system_zone()

There's one place that fails to handle error from add_system_zone() call
and thus we can fail to protect superblock and group-descriptor blocks
properly in case of ENOMEM. Fix it.

Reported-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200728130437.7804-6-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/block_validity.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index 9c40214f31f9f..2d008c1b58f27 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -235,10 +235,13 @@ int ext4_setup_system_zone(struct super_block *sb)
 	for (i=0; i < ngroups; i++) {
 		cond_resched();
 		if (ext4_bg_has_super(sb, i) &&
-		    ((i < 5) || ((i % flex_size) == 0)))
-			add_system_zone(system_blks,
+		    ((i < 5) || ((i % flex_size) == 0))) {
+			ret = add_system_zone(system_blks,
 					ext4_group_first_block_no(sb, i),
 					ext4_bg_num_gdb(sb, i) + 1, 0);
+			if (ret)
+				goto err;
+		}
 		gdp = ext4_get_group_desc(sb, i, NULL);
 		ret = add_system_zone(system_blks,
 				ext4_block_bitmap(sb, gdp), 1, 0);
-- 
GitLab


From 0f5bde1db174f6c471f0bd27198575719dabe3e5 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Tue, 28 Jul 2020 15:04:37 +0200
Subject: [PATCH 0051/1341] ext4: correctly restore system zone info when
 remount fails

When remounting filesystem fails late during remount handling and
block_validity mount option is also changed during the remount, we fail
to restore system zone information to a state matching the mount option.
This is mostly harmless, just the block validity checking will not match
the situation described by the mount option. Make sure these two are always
consistent.

Reported-by: Lukas Czerner <lczerner@redhat.com>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200728130437.7804-7-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/block_validity.c |  8 --------
 fs/ext4/super.c          | 29 +++++++++++++++++++++--------
 2 files changed, 21 insertions(+), 16 deletions(-)

diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index 2d008c1b58f27..c54ba52f2dd4d 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -220,14 +220,6 @@ int ext4_setup_system_zone(struct super_block *sb)
 	int flex_size = ext4_flex_bg_size(sbi);
 	int ret;
 
-	if (!test_opt(sb, BLOCK_VALIDITY)) {
-		if (sbi->system_blks)
-			ext4_release_system_zone(sb);
-		return 0;
-	}
-	if (sbi->system_blks)
-		return 0;
-
 	system_blks = kzalloc(sizeof(*system_blks), GFP_KERNEL);
 	if (!system_blks)
 		return -ENOMEM;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 6507e30e58b5d..0892d71a52bd4 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4727,11 +4727,13 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 
 	ext4_set_resv_clusters(sb);
 
-	err = ext4_setup_system_zone(sb);
-	if (err) {
-		ext4_msg(sb, KERN_ERR, "failed to initialize system "
-			 "zone (%d)", err);
-		goto failed_mount4a;
+	if (test_opt(sb, BLOCK_VALIDITY)) {
+		err = ext4_setup_system_zone(sb);
+		if (err) {
+			ext4_msg(sb, KERN_ERR, "failed to initialize system "
+				 "zone (%d)", err);
+			goto failed_mount4a;
+		}
 	}
 
 	ext4_ext_init(sb);
@@ -5747,9 +5749,16 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 		ext4_register_li_request(sb, first_not_zeroed);
 	}
 
-	err = ext4_setup_system_zone(sb);
-	if (err)
-		goto restore_opts;
+	/*
+	 * Handle creation of system zone data early because it can fail.
+	 * Releasing of existing data is done when we are sure remount will
+	 * succeed.
+	 */
+	if (test_opt(sb, BLOCK_VALIDITY) && !sbi->system_blks) {
+		err = ext4_setup_system_zone(sb);
+		if (err)
+			goto restore_opts;
+	}
 
 	if (sbi->s_journal == NULL && !(old_sb_flags & SB_RDONLY)) {
 		err = ext4_commit_super(sb, 1);
@@ -5771,6 +5780,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 		}
 	}
 #endif
+	if (!test_opt(sb, BLOCK_VALIDITY) && sbi->system_blks)
+		ext4_release_system_zone(sb);
 
 	/*
 	 * Some options can be enabled by ext4 and/or by VFS mount flag
@@ -5792,6 +5803,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 	sbi->s_commit_interval = old_opts.s_commit_interval;
 	sbi->s_min_batch_time = old_opts.s_min_batch_time;
 	sbi->s_max_batch_time = old_opts.s_max_batch_time;
+	if (!test_opt(sb, BLOCK_VALIDITY) && sbi->system_blks)
+		ext4_release_system_zone(sb);
 #ifdef CONFIG_QUOTA
 	sbi->s_jquota_fmt = old_opts.s_jquota_fmt;
 	for (i = 0; i < EXT4_MAXQUOTAS; i++) {
-- 
GitLab


From 377254b2cd2252c7c3151b113cbdf93a7736c2e9 Mon Sep 17 00:00:00 2001
From: Xianting Tian <xianting_tian@126.com>
Date: Fri, 31 Jul 2020 12:10:25 -0400
Subject: [PATCH 0052/1341] fs: prevent BUG_ON in submit_bh_wbc()

If a device is hot-removed --- for example, when a physical device is
unplugged from pcie slot or a nbd device's network is shutdown ---
this can result in a BUG_ON() crash in submit_bh_wbc().  This is
because the when the block device dies, the buffer heads will have
their Buffer_Mapped flag get cleared, leading to the crash in
submit_bh_wbc.

We had attempted to work around this problem in commit a17712c8
("ext4: check superblock mapped prior to committing").  Unfortunately,
it's still possible to hit the BUG_ON(!buffer_mapped(bh)) if the
device dies between when the work-around check in ext4_commit_super()
and when submit_bh_wbh() is finally called:

Code path:
ext4_commit_super
    judge if 'buffer_mapped(sbh)' is false, return <== commit a17712c8
          lock_buffer(sbh)
          ...
          unlock_buffer(sbh)
               __sync_dirty_buffer(sbh,...
                    lock_buffer(sbh)
                        judge if 'buffer_mapped(sbh))' is false, return <== added by this patch
                            submit_bh(...,sbh)
                                submit_bh_wbc(...,sbh,...)

[100722.966497] kernel BUG at fs/buffer.c:3095! <== BUG_ON(!buffer_mapped(bh))' in submit_bh_wbc()
[100722.966503] invalid opcode: 0000 [#1] SMP
[100722.966566] task: ffff8817e15a9e40 task.stack: ffffc90024744000
[100722.966574] RIP: 0010:submit_bh_wbc+0x180/0x190
[100722.966575] RSP: 0018:ffffc90024747a90 EFLAGS: 00010246
[100722.966576] RAX: 0000000000620005 RBX: ffff8818a80603a8 RCX: 0000000000000000
[100722.966576] RDX: ffff8818a80603a8 RSI: 0000000000020800 RDI: 0000000000000001
[100722.966577] RBP: ffffc90024747ac0 R08: 0000000000000000 R09: ffff88207f94170d
[100722.966578] R10: 00000000000437c8 R11: 0000000000000001 R12: 0000000000020800
[100722.966578] R13: 0000000000000001 R14: 000000000bf9a438 R15: ffff88195f333000
[100722.966580] FS:  00007fa2eee27700(0000) GS:ffff88203d840000(0000) knlGS:0000000000000000
[100722.966580] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[100722.966581] CR2: 0000000000f0b008 CR3: 000000201a622003 CR4: 00000000007606e0
[100722.966582] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[100722.966583] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[100722.966583] PKRU: 55555554
[100722.966583] Call Trace:
[100722.966588]  __sync_dirty_buffer+0x6e/0xd0
[100722.966614]  ext4_commit_super+0x1d8/0x290 [ext4]
[100722.966626]  __ext4_std_error+0x78/0x100 [ext4]
[100722.966635]  ? __ext4_journal_get_write_access+0xca/0x120 [ext4]
[100722.966646]  ext4_reserve_inode_write+0x58/0xb0 [ext4]
[100722.966655]  ? ext4_dirty_inode+0x48/0x70 [ext4]
[100722.966663]  ext4_mark_inode_dirty+0x53/0x1e0 [ext4]
[100722.966671]  ? __ext4_journal_start_sb+0x6d/0xf0 [ext4]
[100722.966679]  ext4_dirty_inode+0x48/0x70 [ext4]
[100722.966682]  __mark_inode_dirty+0x17f/0x350
[100722.966686]  generic_update_time+0x87/0xd0
[100722.966687]  touch_atime+0xa9/0xd0
[100722.966690]  generic_file_read_iter+0xa09/0xcd0
[100722.966694]  ? page_cache_tree_insert+0xb0/0xb0
[100722.966704]  ext4_file_read_iter+0x4a/0x100 [ext4]
[100722.966707]  ? __inode_security_revalidate+0x4f/0x60
[100722.966709]  __vfs_read+0xec/0x160
[100722.966711]  vfs_read+0x8c/0x130
[100722.966712]  SyS_pread64+0x87/0xb0
[100722.966716]  do_syscall_64+0x67/0x1b0
[100722.966719]  entry_SYSCALL64_slow_path+0x25/0x25

To address this, add the check of 'buffer_mapped(bh)' to
__sync_dirty_buffer().  This also has the benefit of fixing this for
other file systems.

With this addition, we can drop the workaround in ext4_commit_supper().

[ Commit description rewritten by tytso. ]

Signed-off-by: Xianting Tian <xianting_tian@126.com>
Link: https://lore.kernel.org/r/1596211825-8750-1-git-send-email-xianting_tian@126.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/buffer.c     | 9 +++++++++
 fs/ext4/super.c | 7 -------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index 64fe82ec65ff1..75a8849abb5d2 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3160,6 +3160,15 @@ int __sync_dirty_buffer(struct buffer_head *bh, int op_flags)
 	WARN_ON(atomic_read(&bh->b_count) < 1);
 	lock_buffer(bh);
 	if (test_clear_buffer_dirty(bh)) {
+		/*
+		 * The bh should be mapped, but it might not be if the
+		 * device was hot-removed. Not much we can do but fail the I/O.
+		 */
+		if (!buffer_mapped(bh)) {
+			unlock_buffer(bh);
+			return -EIO;
+		}
+
 		get_bh(bh);
 		bh->b_end_io = end_buffer_write_sync;
 		ret = submit_bh(REQ_OP_WRITE, op_flags, bh);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 0892d71a52bd4..daa94c7f7271f 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5235,13 +5235,6 @@ static int ext4_commit_super(struct super_block *sb, int sync)
 	if (!sbh || block_device_ejected(sb))
 		return error;
 
-	/*
-	 * The superblock bh should be mapped, but it might not be if the
-	 * device was hot-removed. Not much we can do but fail the I/O.
-	 */
-	if (!buffer_mapped(sbh))
-		return error;
-
 	/*
 	 * If the file system is mounted read-only, don't update the
 	 * superblock write time.  This avoids updating the superblock
-- 
GitLab


From 7303cb5bfe845f7d43cd9b2dbd37dbb266efda9b Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Fri, 31 Jul 2020 18:21:35 +0200
Subject: [PATCH 0053/1341] ext4: fix checking of directory entry validity for
 inline directories

ext4_search_dir() and ext4_generic_delete_entry() can be called both for
standard director blocks and for inline directories stored inside inode
or inline xattr space. For the second case we didn't call
ext4_check_dir_entry() with proper constraints that could result in
accepting corrupted directory entry as well as false positive filesystem
errors like:

EXT4-fs error (device dm-0): ext4_search_dir:1395: inode #28320400:
block 113246792: comm dockerd: bad entry in directory: directory entry too
close to block end - offset=0, inode=28320403, rec_len=32, name_len=8,
size=4096

Fix the arguments passed to ext4_check_dir_entry().

Fixes: 109ba779d6cc ("ext4: check for directory entries too close to block end")
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200731162135.8080-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/namei.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index cb2eb1967e730..b92571beab727 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1396,8 +1396,8 @@ int ext4_search_dir(struct buffer_head *bh, char *search_buf, int buf_size,
 		    ext4_match(dir, fname, de)) {
 			/* found a match - just to be sure, do
 			 * a full check */
-			if (ext4_check_dir_entry(dir, NULL, de, bh, bh->b_data,
-						 bh->b_size, offset))
+			if (ext4_check_dir_entry(dir, NULL, de, bh, search_buf,
+						 buf_size, offset))
 				return -1;
 			*res_dir = de;
 			return 1;
@@ -2482,7 +2482,7 @@ int ext4_generic_delete_entry(handle_t *handle,
 	de = (struct ext4_dir_entry_2 *)entry_buf;
 	while (i < buf_size - csum_size) {
 		if (ext4_check_dir_entry(dir, NULL, de, bh,
-					 bh->b_data, bh->b_size, i))
+					 entry_buf, buf_size, i))
 			return -EFSCORRUPTED;
 		if (de == de_del)  {
 			if (pde)
-- 
GitLab


From 46d4a403a04c0ba46641452367b6a04bcf918a06 Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <grandmaster@al2klimov.de>
Date: Wed, 8 Jul 2020 14:56:22 +0200
Subject: [PATCH 0054/1341] auxdisplay: Replace HTTP links with HTTPS ones

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
	  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
---
 drivers/auxdisplay/arm-charlcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/auxdisplay/arm-charlcd.c b/drivers/auxdisplay/arm-charlcd.c
index dea031484cc48..0b1c99cca7334 100644
--- a/drivers/auxdisplay/arm-charlcd.c
+++ b/drivers/auxdisplay/arm-charlcd.c
@@ -2,7 +2,7 @@
 /*
  * Driver for the on-board character LCD found on some ARM reference boards
  * This is basically an Hitachi HD44780 LCD with a custom IP block to drive it
- * http://en.wikipedia.org/wiki/HD44780_Character_LCD
+ * https://en.wikipedia.org/wiki/HD44780_Character_LCD
  * Currently it will just display the text "ARM Linux" and the linux version
  *
  * Author: Linus Walleij <triad@df.lth.se>
-- 
GitLab


From ea7dc097826b06a9746a2e74c2d6e78d35c98088 Mon Sep 17 00:00:00 2001
From: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
Date: Fri, 7 Aug 2020 21:40:17 +0530
Subject: [PATCH 0055/1341] ASoC: amd: Replacing component->name with
 codec_dai->name.

Replacing string compare with "codec_dai->name" instead of comparing with
"codec_dai->component->name" in hw_params because,
Here the component name for codec RT1015 is "i2c-10EC5682:00"
and will never be "rt1015-aif1" as it is codec-dai->name.
So, strcmp() always compares and fails to set the
sysclk,pll,bratio for expected codec-dai="rt1015-aif1".

Signed-off-by: Ravulapati Vishnu vardhan rao <Vishnuvardhanrao.Ravulapati@amd.com>
Link: https://lore.kernel.org/r/20200807161046.17932-1-Vishnuvardhanrao.Ravulapati@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/amd/acp3x-rt5682-max9836.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/amd/acp3x-rt5682-max9836.c b/sound/soc/amd/acp3x-rt5682-max9836.c
index 55815fdaa1aaf..406526e79af34 100644
--- a/sound/soc/amd/acp3x-rt5682-max9836.c
+++ b/sound/soc/amd/acp3x-rt5682-max9836.c
@@ -138,7 +138,7 @@ static int acp3x_1015_hw_params(struct snd_pcm_substream *substream,
 	srate = params_rate(params);
 
 	for_each_rtd_codec_dais(rtd, i, codec_dai) {
-		if (strcmp(codec_dai->component->name, "rt1015-aif"))
+		if (strcmp(codec_dai->name, "rt1015-aif"))
 			continue;
 		ret = snd_soc_dai_set_bclk_ratio(codec_dai, 64);
 		if (ret < 0)
-- 
GitLab


From 09dad81e0f1701ea26babe2442a1478d6ad447d3 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Mon, 10 Aug 2020 10:39:31 +0100
Subject: [PATCH 0056/1341] regulator: fix spelling mistake "Cant" -> "Can't"

There is a spelling mistake in a dev_err message. Fix it.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200810093931.50624-1-colin.king@canonical.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/fixed.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index d54830e48b8dc..142a70a891536 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -182,7 +182,7 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
 
 		drvdata->enable_clock = devm_clk_get(dev, NULL);
 		if (IS_ERR(drvdata->enable_clock)) {
-			dev_err(dev, "Cant get enable-clock from devicetree\n");
+			dev_err(dev, "Can't get enable-clock from devicetree\n");
 			return -ENOENT;
 		}
 	} else {
-- 
GitLab


From 78484d7c747e30468b35bd5f19edf602f50162a7 Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sun, 9 Aug 2020 22:34:06 +0200
Subject: [PATCH 0057/1341] drm: amdgpu: Use the correct size when allocating
 memory
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When '*sgt' is allocated, we must allocated 'sizeof(**sgt)' bytes instead
of 'sizeof(*sg)'.

The sizeof(*sg) is bigger than sizeof(**sgt) so this wastes memory but
it won't lead to corruption.

Fixes: f44ffd677fb3 ("drm/amdgpu: add support for exporting VRAM using DMA-buf v3")
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
index 134cc36e30c5e..0739e259bf910 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
@@ -462,7 +462,7 @@ int amdgpu_vram_mgr_alloc_sgt(struct amdgpu_device *adev,
 	unsigned int pages;
 	int i, r;
 
-	*sgt = kmalloc(sizeof(*sg), GFP_KERNEL);
+	*sgt = kmalloc(sizeof(**sgt), GFP_KERNEL);
 	if (!*sgt)
 		return -ENOMEM;
 
-- 
GitLab


From d5bbb4761c9ffbe8e3a547b74ec26fb6ce31bf32 Mon Sep 17 00:00:00 2001
From: Liu ChengZhe <ChengZhe.Liu@amd.com>
Date: Thu, 6 Aug 2020 14:54:08 +0800
Subject: [PATCH 0058/1341] drm/amdgpu: Skip some registers config for SRIOV

Some registers are not accessible to virtual function setup, so
skip their initialization when in VF-SRIOV mode.

v2: move SRIOV VF check into specify functions;
modify commit description and comment.

Signed-off-by: Liu ChengZhe <ChengZhe.Liu@amd.com>
Reviewed-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c | 19 +++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c  | 19 +++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c
index fa0bca3e1f730..5d2505956f847 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfxhub_v2_1.c
@@ -135,6 +135,12 @@ static void gfxhub_v2_1_init_cache_regs(struct amdgpu_device *adev)
 {
 	uint32_t tmp;
 
+	/* These registers are not accessible to VF-SRIOV.
+	 * The PF will program them instead.
+	 */
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	/* Setup L2 cache */
 	tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_CACHE, 1);
@@ -190,6 +196,12 @@ static void gfxhub_v2_1_enable_system_domain(struct amdgpu_device *adev)
 
 static void gfxhub_v2_1_disable_identity_aperture(struct amdgpu_device *adev)
 {
+	/* These registers are not accessible to VF-SRIOV.
+	 * The PF will program them instead.
+	 */
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
 		     0xFFFFFFFF);
 	WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_HI32,
@@ -326,6 +338,13 @@ void gfxhub_v2_1_set_fault_enable_default(struct amdgpu_device *adev,
 					  bool value)
 {
 	u32 tmp;
+
+	/* These registers are not accessible to VF-SRIOV.
+	 * The PF will program them instead.
+	 */
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL);
 	tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 			    RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c
index 757fa8e83f5b3..c79fc54bc3c42 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v2_0.c
@@ -134,6 +134,12 @@ static void mmhub_v2_0_init_cache_regs(struct amdgpu_device *adev)
 {
 	uint32_t tmp;
 
+	/* These registers are not accessible to VF-SRIOV.
+	 * The PF will program them instead.
+	 */
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	/* Setup L2 cache */
 	tmp = RREG32_SOC15(MMHUB, 0, mmMMVM_L2_CNTL);
 	tmp = REG_SET_FIELD(tmp, MMVM_L2_CNTL, ENABLE_L2_CACHE, 1);
@@ -189,6 +195,12 @@ static void mmhub_v2_0_enable_system_domain(struct amdgpu_device *adev)
 
 static void mmhub_v2_0_disable_identity_aperture(struct amdgpu_device *adev)
 {
+	/* These registers are not accessible to VF-SRIOV.
+	 * The PF will program them instead.
+	 */
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	WREG32_SOC15(MMHUB, 0,
 		     mmMMVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
 		     0xFFFFFFFF);
@@ -318,6 +330,13 @@ void mmhub_v2_0_gart_disable(struct amdgpu_device *adev)
 void mmhub_v2_0_set_fault_enable_default(struct amdgpu_device *adev, bool value)
 {
 	u32 tmp;
+
+	/* These registers are not accessible to VF-SRIOV.
+	 * The PF will program them instead.
+	 */
+	if (amdgpu_sriov_vf(adev))
+		return;
+
 	tmp = RREG32_SOC15(MMHUB, 0, mmMMVM_L2_PROTECTION_FAULT_CNTL);
 	tmp = REG_SET_FIELD(tmp, MMVM_L2_PROTECTION_FAULT_CNTL,
 			    RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
-- 
GitLab


From 266d81d9eed30f4994d76a2b237c63ece062eefe Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Fri, 7 Aug 2020 15:03:40 +0800
Subject: [PATCH 0059/1341] drm/amd/powerplay: correct Vega20 cached smu
 feature state

Correct the cached smu feature state on pp_features sysfs
setting.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../drm/amd/powerplay/hwmgr/vega20_hwmgr.c    | 38 +++++++++----------
 1 file changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
index 3b8839641770b..e9676ebdba630 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
@@ -979,10 +979,7 @@ static int vega20_disable_all_smu_features(struct pp_hwmgr *hwmgr)
 {
 	struct vega20_hwmgr *data =
 			(struct vega20_hwmgr *)(hwmgr->backend);
-	uint64_t features_enabled;
-	int i;
-	bool enabled;
-	int ret = 0;
+	int i, ret = 0;
 
 	PP_ASSERT_WITH_CODE((ret = smum_send_msg_to_smc(hwmgr,
 			PPSMC_MSG_DisableAllSmuFeatures,
@@ -990,17 +987,8 @@ static int vega20_disable_all_smu_features(struct pp_hwmgr *hwmgr)
 			"[DisableAllSMUFeatures] Failed to disable all smu features!",
 			return ret);
 
-	ret = vega20_get_enabled_smc_features(hwmgr, &features_enabled);
-	PP_ASSERT_WITH_CODE(!ret,
-			"[DisableAllSMUFeatures] Failed to get enabled smc features!",
-			return ret);
-
-	for (i = 0; i < GNLD_FEATURES_MAX; i++) {
-		enabled = (features_enabled & data->smu_features[i].smu_feature_bitmap) ?
-			true : false;
-		data->smu_features[i].enabled = enabled;
-		data->smu_features[i].supported = enabled;
-	}
+	for (i = 0; i < GNLD_FEATURES_MAX; i++)
+		data->smu_features[i].enabled = 0;
 
 	return 0;
 }
@@ -3230,10 +3218,11 @@ static int vega20_get_ppfeature_status(struct pp_hwmgr *hwmgr, char *buf)
 
 static int vega20_set_ppfeature_status(struct pp_hwmgr *hwmgr, uint64_t new_ppfeature_masks)
 {
-	uint64_t features_enabled;
-	uint64_t features_to_enable;
-	uint64_t features_to_disable;
-	int ret = 0;
+	struct vega20_hwmgr *data =
+			(struct vega20_hwmgr *)(hwmgr->backend);
+	uint64_t features_enabled, features_to_enable, features_to_disable;
+	int i, ret = 0;
+	bool enabled;
 
 	if (new_ppfeature_masks >= (1ULL << GNLD_FEATURES_MAX))
 		return -EINVAL;
@@ -3262,6 +3251,17 @@ static int vega20_set_ppfeature_status(struct pp_hwmgr *hwmgr, uint64_t new_ppfe
 			return ret;
 	}
 
+	/* Update the cached feature enablement state */
+	ret = vega20_get_enabled_smc_features(hwmgr, &features_enabled);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < GNLD_FEATURES_MAX; i++) {
+		enabled = (features_enabled & data->smu_features[i].smu_feature_bitmap) ?
+			true : false;
+		data->smu_features[i].enabled = enabled;
+	}
+
 	return 0;
 }
 
-- 
GitLab


From 2c5b8080d810d98e3e59617680218499b17c84a1 Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Fri, 7 Aug 2020 17:01:47 +0800
Subject: [PATCH 0060/1341] drm/amd/powerplay: correct UVD/VCE PG state on
 custom pptable uploading

The UVD/VCE PG state is managed by UVD and VCE IP. It's error-prone to
assume the bootup state in SMU based on the dpm status.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
index e9676ebdba630..ea70d736f6a89 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
@@ -1640,12 +1640,6 @@ static void vega20_init_powergate_state(struct pp_hwmgr *hwmgr)
 
 	data->uvd_power_gated = true;
 	data->vce_power_gated = true;
-
-	if (data->smu_features[GNLD_DPM_UVD].enabled)
-		data->uvd_power_gated = false;
-
-	if (data->smu_features[GNLD_DPM_VCE].enabled)
-		data->vce_power_gated = false;
 }
 
 static int vega20_enable_dpm_tasks(struct pp_hwmgr *hwmgr)
-- 
GitLab


From 97a9b60fa3bf29d29d0fc253a98096c02fb8106e Mon Sep 17 00:00:00 2001
From: "shiwu.zhang" <shiwu.zhang@amd.com>
Date: Fri, 7 Aug 2020 16:43:59 +0800
Subject: [PATCH 0061/1341] drm/amdgpu: update gc golden register for arcturus

Update golden setting to improve performance on HPC
and ML apps

Signed-off-by: shiwu.zhang <shiwu.zhang@amd.com>
Tested-by: gang.long <gang.long@amd.com>
Reviewed-by: guchun.chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
index cb9d60a4e05ed..b95f22262a90c 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c
@@ -691,6 +691,7 @@ static const struct soc15_reg_golden golden_settings_gc_9_4_1_arct[] =
 	SOC15_REG_GOLDEN_VALUE(GC, 0, mmTCP_CHAN_STEER_5_ARCT, 0x3ff, 0x135),
 	SOC15_REG_GOLDEN_VALUE(GC, 0, mmSQ_CONFIG, 0xffffffff, 0x011A0000),
 	SOC15_REG_GOLDEN_VALUE(GC, 0, mmSQ_FIFO_SIZES, 0xffffffff, 0x00000f00),
+	SOC15_REG_GOLDEN_VALUE(GC, 0, mmTCP_UTCL1_CNTL1, 0x30000000, 0x30000000)
 };
 
 static const struct soc15_reg_rlcg rlcg_access_gc_9_0[] = {
-- 
GitLab


From a49f6727e14caff32419cc3002b9ae9cafb750d7 Mon Sep 17 00:00:00 2001
From: Aric Cyr <aric.cyr@amd.com>
Date: Mon, 27 Jul 2020 21:21:16 -0400
Subject: [PATCH 0062/1341] drm/amd/display: Fix incorrect backlight register
 offset for DCN

[Why]
Typo in backlight refactor inctroduced wrong register offset.

[How]
Change DCE to DCN register map for PWRSEQ_REF_DIV

Cc: stable@vger.kernel.org
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Reviewed-by: Ashley Thomas <Ashley.Thomas2@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dce_panel_cntl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_panel_cntl.h b/drivers/gpu/drm/amd/display/dc/dce/dce_panel_cntl.h
index 70ec691e14d2d..99c68ca9c7e00 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_panel_cntl.h
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_panel_cntl.h
@@ -49,7 +49,7 @@
 #define DCN_PANEL_CNTL_REG_LIST()\
 	DCN_PANEL_CNTL_SR(PWRSEQ_CNTL, LVTMA), \
 	DCN_PANEL_CNTL_SR(PWRSEQ_STATE, LVTMA), \
-	DCE_PANEL_CNTL_SR(PWRSEQ_REF_DIV, LVTMA), \
+	DCN_PANEL_CNTL_SR(PWRSEQ_REF_DIV, LVTMA), \
 	SR(BL_PWM_CNTL), \
 	SR(BL_PWM_CNTL2), \
 	SR(BL_PWM_PERIOD_CNTL), \
-- 
GitLab


From e4ed4dbbc8383d42a197da8fe7ca6434b0f14def Mon Sep 17 00:00:00 2001
From: Anthony Koo <Anthony.Koo@amd.com>
Date: Wed, 29 Jul 2020 17:33:27 -0400
Subject: [PATCH 0063/1341] drm/amd/display: Fix LFC multiplier changing
 erratically

[Why]
1. There is a calculation that is using frame_time_in_us instead of
last_render_time_in_us to calculate whether choosing an LFC multiplier
would cause the inserted frame duration to be outside of range.

2. We do not handle unsigned integer subtraction correctly and it underflows
to a really large value, which causes some logic errors.

[How]
1. Fix logic to calculate 'within range' using last_render_time_in_us
2. Split out delta_from_mid_point_delta_in_us calculation to ensure
we don't underflow and wrap around

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../amd/display/modules/freesync/freesync.c   | 36 +++++++++++++++----
 1 file changed, 29 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
index 81820f3d6b3b4..d988533d4af5f 100644
--- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
+++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c
@@ -324,22 +324,44 @@ static void apply_below_the_range(struct core_freesync *core_freesync,
 
 		/* Choose number of frames to insert based on how close it
 		 * can get to the mid point of the variable range.
+		 *  - Delta for CEIL: delta_from_mid_point_in_us_1
+		 *  - Delta for FLOOR: delta_from_mid_point_in_us_2
 		 */
-		if ((frame_time_in_us / mid_point_frames_ceil) > in_out_vrr->min_duration_in_us &&
-				(delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2 ||
-						mid_point_frames_floor < 2)) {
+		if ((last_render_time_in_us / mid_point_frames_ceil) < in_out_vrr->min_duration_in_us) {
+			/* Check for out of range.
+			 * If using CEIL produces a value that is out of range,
+			 * then we are forced to use FLOOR.
+			 */
+			frames_to_insert = mid_point_frames_floor;
+		} else if (mid_point_frames_floor < 2) {
+			/* Check if FLOOR would result in non-LFC. In this case
+			 * choose to use CEIL
+			 */
+			frames_to_insert = mid_point_frames_ceil;
+		} else if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) {
+			/* If choosing CEIL results in a frame duration that is
+			 * closer to the mid point of the range.
+			 * Choose CEIL
+			 */
 			frames_to_insert = mid_point_frames_ceil;
-			delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 -
-					delta_from_mid_point_in_us_1;
 		} else {
+			/* If choosing FLOOR results in a frame duration that is
+			 * closer to the mid point of the range.
+			 * Choose FLOOR
+			 */
 			frames_to_insert = mid_point_frames_floor;
-			delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 -
-					delta_from_mid_point_in_us_2;
 		}
 
 		/* Prefer current frame multiplier when BTR is enabled unless it drifts
 		 * too far from the midpoint
 		 */
+		if (delta_from_mid_point_in_us_1 < delta_from_mid_point_in_us_2) {
+			delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_2 -
+					delta_from_mid_point_in_us_1;
+		} else {
+			delta_from_mid_point_delta_in_us = delta_from_mid_point_in_us_1 -
+					delta_from_mid_point_in_us_2;
+		}
 		if (in_out_vrr->btr.frames_to_insert != 0 &&
 				delta_from_mid_point_delta_in_us < BTR_DRIFT_MARGIN) {
 			if (((last_render_time_in_us / in_out_vrr->btr.frames_to_insert) <
-- 
GitLab


From abba907c7a20032c2d504fd5afe3af7d440a09d0 Mon Sep 17 00:00:00 2001
From: Anthony Koo <Anthony.Koo@amd.com>
Date: Wed, 29 Jul 2020 17:43:10 -0400
Subject: [PATCH 0064/1341] drm/amd/display: Switch to immediate mode for
 updating infopackets

[Why]
Using FRAME_UPDATE will result in infopacket to be potentially updated
one frame late.
In commit stream scenarios for previously active stream, some stale
infopacket data from previous config might be erroneously sent out on
initial frame after stream is re-enabled.

[How]
Switch to using IMMEDIATE_UPDATE mode

Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Ashley Thomas <Ashley.Thomas2@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../amd/display/dc/dcn10/dcn10_stream_encoder.c  | 16 ++++++++--------
 .../amd/display/dc/dcn10/dcn10_stream_encoder.h  | 14 ++++++++++++++
 2 files changed, 22 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c
index 07b2f9399671d..842abb4c475bc 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c
@@ -121,35 +121,35 @@ void enc1_update_generic_info_packet(
 	switch (packet_index) {
 	case 0:
 		REG_UPDATE(AFMT_VBI_PACKET_CONTROL1,
-				AFMT_GENERIC0_FRAME_UPDATE, 1);
+				AFMT_GENERIC0_IMMEDIATE_UPDATE, 1);
 		break;
 	case 1:
 		REG_UPDATE(AFMT_VBI_PACKET_CONTROL1,
-				AFMT_GENERIC1_FRAME_UPDATE, 1);
+				AFMT_GENERIC1_IMMEDIATE_UPDATE, 1);
 		break;
 	case 2:
 		REG_UPDATE(AFMT_VBI_PACKET_CONTROL1,
-				AFMT_GENERIC2_FRAME_UPDATE, 1);
+				AFMT_GENERIC2_IMMEDIATE_UPDATE, 1);
 		break;
 	case 3:
 		REG_UPDATE(AFMT_VBI_PACKET_CONTROL1,
-				AFMT_GENERIC3_FRAME_UPDATE, 1);
+				AFMT_GENERIC3_IMMEDIATE_UPDATE, 1);
 		break;
 	case 4:
 		REG_UPDATE(AFMT_VBI_PACKET_CONTROL1,
-				AFMT_GENERIC4_FRAME_UPDATE, 1);
+				AFMT_GENERIC4_IMMEDIATE_UPDATE, 1);
 		break;
 	case 5:
 		REG_UPDATE(AFMT_VBI_PACKET_CONTROL1,
-				AFMT_GENERIC5_FRAME_UPDATE, 1);
+				AFMT_GENERIC5_IMMEDIATE_UPDATE, 1);
 		break;
 	case 6:
 		REG_UPDATE(AFMT_VBI_PACKET_CONTROL1,
-				AFMT_GENERIC6_FRAME_UPDATE, 1);
+				AFMT_GENERIC6_IMMEDIATE_UPDATE, 1);
 		break;
 	case 7:
 		REG_UPDATE(AFMT_VBI_PACKET_CONTROL1,
-				AFMT_GENERIC7_FRAME_UPDATE, 1);
+				AFMT_GENERIC7_IMMEDIATE_UPDATE, 1);
 		break;
 	default:
 		break;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h
index ed385b1477be7..30eae7459d509 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.h
@@ -281,7 +281,14 @@ struct dcn10_stream_enc_registers {
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC2_FRAME_UPDATE, mask_sh),\
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC3_FRAME_UPDATE, mask_sh),\
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC4_FRAME_UPDATE, mask_sh),\
+	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC0_IMMEDIATE_UPDATE, mask_sh),\
+	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC1_IMMEDIATE_UPDATE, mask_sh),\
+	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC2_IMMEDIATE_UPDATE, mask_sh),\
+	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC3_IMMEDIATE_UPDATE, mask_sh),\
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC4_IMMEDIATE_UPDATE, mask_sh),\
+	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC5_IMMEDIATE_UPDATE, mask_sh),\
+	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC6_IMMEDIATE_UPDATE, mask_sh),\
+	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC7_IMMEDIATE_UPDATE, mask_sh),\
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC5_FRAME_UPDATE, mask_sh),\
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC6_FRAME_UPDATE, mask_sh),\
 	SE_SF(DIG0_AFMT_VBI_PACKET_CONTROL1, AFMT_GENERIC7_FRAME_UPDATE, mask_sh),\
@@ -345,7 +352,14 @@ struct dcn10_stream_enc_registers {
 	type AFMT_GENERIC2_FRAME_UPDATE;\
 	type AFMT_GENERIC3_FRAME_UPDATE;\
 	type AFMT_GENERIC4_FRAME_UPDATE;\
+	type AFMT_GENERIC0_IMMEDIATE_UPDATE;\
+	type AFMT_GENERIC1_IMMEDIATE_UPDATE;\
+	type AFMT_GENERIC2_IMMEDIATE_UPDATE;\
+	type AFMT_GENERIC3_IMMEDIATE_UPDATE;\
 	type AFMT_GENERIC4_IMMEDIATE_UPDATE;\
+	type AFMT_GENERIC5_IMMEDIATE_UPDATE;\
+	type AFMT_GENERIC6_IMMEDIATE_UPDATE;\
+	type AFMT_GENERIC7_IMMEDIATE_UPDATE;\
 	type AFMT_GENERIC5_FRAME_UPDATE;\
 	type AFMT_GENERIC6_FRAME_UPDATE;\
 	type AFMT_GENERIC7_FRAME_UPDATE;\
-- 
GitLab


From b24bdc37d03a0478189e20a50286092840f414fa Mon Sep 17 00:00:00 2001
From: Stylon Wang <stylon.wang@amd.com>
Date: Tue, 28 Jul 2020 15:10:35 +0800
Subject: [PATCH 0065/1341] drm/amd/display: Fix EDID parsing after resume from
 suspend

[Why]
Resuming from suspend, CEA blocks from EDID are not parsed and no video
modes can support YUV420. When this happens, output bpc cannot go over
8-bit with 4K modes on HDMI.

[How]
In amdgpu_dm_update_connector_after_detect(), drm_add_edid_modes() is
called after drm_connector_update_edid_property() to fully parse EDID
and update display info.

Cc: stable@vger.kernel.org
Signed-off-by: Stylon Wang <stylon.wang@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index e6833a2d01f87..39444619d9b5f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2196,6 +2196,7 @@ void amdgpu_dm_update_connector_after_detect(
 
 			drm_connector_update_edid_property(connector,
 							   aconnector->edid);
+			drm_add_edid_modes(connector, aconnector->edid);
 
 			if (aconnector->dc_link->aux_mode)
 				drm_dp_cec_set_edid(&aconnector->dm_dp_aux.aux,
-- 
GitLab


From 79940e4d10df9c737a394630968471c632246ee0 Mon Sep 17 00:00:00 2001
From: Jaehyun Chung <jaehyun.chung@amd.com>
Date: Thu, 30 Jul 2020 16:31:29 -0400
Subject: [PATCH 0066/1341] drm/amd/display: Blank stream before destroying
 HDCP session

[Why]
Stream disable sequence incorretly destroys HDCP session while stream is
not blanked and while audio is not muted. This sequence causes a flash
of corruption during mode change and an audio click.

[How]
Change sequence to blank stream before destroying HDCP session. Audio will
also be muted by blanking the stream.

Cc: stable@vger.kernel.org
Signed-off-by: Jaehyun Chung <jaehyun.chung@amd.com>
Reviewed-by: Alvin Lee <Alvin.Lee2@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 4bd6e03a7ef37..117d8aaf2a9bf 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -3286,12 +3286,11 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx)
 		core_link_set_avmute(pipe_ctx, true);
 	}
 
+	dc->hwss.blank_stream(pipe_ctx);
 #if defined(CONFIG_DRM_AMD_DC_HDCP)
 	update_psp_stream_config(pipe_ctx, true);
 #endif
 
-	dc->hwss.blank_stream(pipe_ctx);
-
 	if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
 		deallocate_mst_payload(pipe_ctx);
 
-- 
GitLab


From f41ed88cbd6f025f7a683a11a74f901555fba11c Mon Sep 17 00:00:00 2001
From: Daniel Kolesa <daniel@octaforge.org>
Date: Sat, 8 Aug 2020 22:42:35 +0200
Subject: [PATCH 0067/1341] drm/amdgpu/display: use GFP_ATOMIC in
 dcn20_validate_bandwidth_internal

GFP_KERNEL may and will sleep, and this is being executed in
a non-preemptible context; this will mess things up since it's
called inbetween DC_FP_START/END, and rescheduling will result
in the DC_FP_END later being called in a different context (or
just crashing if any floating point/vector registers/instructions
are used after the call is resumed in a different context).

Signed-off-by: Daniel Kolesa <daniel@octaforge.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index 790baf5526959..9140b3fc767ab 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -3141,7 +3141,7 @@ static bool dcn20_validate_bandwidth_internal(struct dc *dc, struct dc_state *co
 	int vlevel = 0;
 	int pipe_split_from[MAX_PIPES];
 	int pipe_cnt = 0;
-	display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_KERNEL);
+	display_e2e_pipe_params_st *pipes = kzalloc(dc->res_pool->pipe_count * sizeof(display_e2e_pipe_params_st), GFP_ATOMIC);
 	DC_LOGGER_INIT(dc->ctx->logger);
 
 	BW_VAL_TRACE_COUNT();
-- 
GitLab


From efc913c8fb88728626759735e1b09370a6813180 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 10 Aug 2020 15:46:31 +0200
Subject: [PATCH 0068/1341] ASoC: Make soc_component_read() returning an error
 code again

Along with the recent unification of snd_soc_component_read*()
functions, the behavior of snd_soc_component_read() was changed
slightly; namely it returns the register read value directly, and even
if an error happens, it returns zero (but it prints an error
message).  That said, the caller side can't know whether it's an error
or not any longer.

Ideally this shouldn't matter much, but in practice this seems causing
a regression, as John reported.  And, grepping the tree revealed that
there are still plenty of callers that do check the error code, so
we'll need to deal with them in anyway.

As a quick band-aid over the regression, this patch changes the return
value of snd_soc_component_read() again to the negative error code.
It can't work, obviously, for 32bit register values, but it should be
enough for the known regressions, so far.

Fixes: cf6e26c71bfd ("ASoC: soc-component: merge snd_soc_component_read() and snd_soc_component_read32()")
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20200810134631.19742-1-tiwai@suse.de
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/soc-component.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/soc-component.c b/sound/soc/soc-component.c
index f0b4f4bc44a45..5504b92946e38 100644
--- a/sound/soc/soc-component.c
+++ b/sound/soc/soc-component.c
@@ -406,7 +406,7 @@ static unsigned int soc_component_read_no_lock(
 		ret = -EIO;
 
 	if (ret < 0)
-		soc_component_ret(component, ret);
+		return soc_component_ret(component, ret);
 
 	return val;
 }
-- 
GitLab


From 56235e4bc5ae58cb8fcd9314dba4e9ab077ddda8 Mon Sep 17 00:00:00 2001
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Date: Tue, 11 Aug 2020 13:02:04 +0100
Subject: [PATCH 0069/1341] ASoC: q6afe-dai: mark all widgets registers as
 SND_SOC_NOPM

Looks like the q6afe-dai dapm widget registers are set as "0",
which is a not correct.

As this registers will be read by ASoC core during startup
which will throw up errors, Fix this by making the registers
as SND_SOC_NOPM as these should be never used.

With recent changes to ASoC core, every register read/write
failures are reported very verbosely. Prior to this fails to reads
are totally ignored, so we never saw any error messages.

Fixes: 24c4cbcfac09 ("ASoC: qdsp6: q6afe: Add q6afe dai driver")
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200811120205.21805-1-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/qcom/qdsp6/q6afe-dai.c | 210 +++++++++++++++----------------
 1 file changed, 105 insertions(+), 105 deletions(-)

diff --git a/sound/soc/qcom/qdsp6/q6afe-dai.c b/sound/soc/qcom/qdsp6/q6afe-dai.c
index 2a5302f1db98a..0168af8492727 100644
--- a/sound/soc/qcom/qdsp6/q6afe-dai.c
+++ b/sound/soc/qcom/qdsp6/q6afe-dai.c
@@ -1150,206 +1150,206 @@ static int q6afe_of_xlate_dai_name(struct snd_soc_component *component,
 }
 
 static const struct snd_soc_dapm_widget q6afe_dai_widgets[] = {
-	SND_SOC_DAPM_AIF_IN("HDMI_RX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_IN("SLIMBUS_0_RX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_IN("SLIMBUS_1_RX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_IN("SLIMBUS_2_RX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_IN("SLIMBUS_3_RX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_IN("SLIMBUS_4_RX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_IN("SLIMBUS_5_RX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_IN("SLIMBUS_6_RX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_OUT("SLIMBUS_0_TX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_OUT("SLIMBUS_1_TX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_OUT("SLIMBUS_2_TX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_OUT("SLIMBUS_3_TX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_OUT("SLIMBUS_4_TX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_OUT("SLIMBUS_5_TX", NULL, 0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_OUT("SLIMBUS_6_TX", NULL, 0, 0, 0, 0),
+	SND_SOC_DAPM_AIF_IN("HDMI_RX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SLIMBUS_0_RX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SLIMBUS_1_RX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SLIMBUS_2_RX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SLIMBUS_3_RX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SLIMBUS_4_RX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SLIMBUS_5_RX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SLIMBUS_6_RX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("SLIMBUS_0_TX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("SLIMBUS_1_TX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("SLIMBUS_2_TX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("SLIMBUS_3_TX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("SLIMBUS_4_TX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("SLIMBUS_5_TX", NULL, 0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("SLIMBUS_6_TX", NULL, 0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUAT_MI2S_RX", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUAT_MI2S_TX", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("TERT_MI2S_RX", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("TERT_MI2S_TX", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SEC_MI2S_RX", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SEC_MI2S_TX", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SEC_MI2S_RX_SD1",
 			"Secondary MI2S Playback SD1",
-			0, 0, 0, 0),
+			0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("PRI_MI2S_RX", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("PRI_MI2S_TX", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 
 	SND_SOC_DAPM_AIF_IN("PRIMARY_TDM_RX_0", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("PRIMARY_TDM_RX_1", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("PRIMARY_TDM_RX_2", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("PRIMARY_TDM_RX_3", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("PRIMARY_TDM_RX_4", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("PRIMARY_TDM_RX_5", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("PRIMARY_TDM_RX_6", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("PRIMARY_TDM_RX_7", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("PRIMARY_TDM_TX_0", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("PRIMARY_TDM_TX_1", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("PRIMARY_TDM_TX_2", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("PRIMARY_TDM_TX_3", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("PRIMARY_TDM_TX_4", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("PRIMARY_TDM_TX_5", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("PRIMARY_TDM_TX_6", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("PRIMARY_TDM_TX_7", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 
 	SND_SOC_DAPM_AIF_IN("SEC_TDM_RX_0", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SEC_TDM_RX_1", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SEC_TDM_RX_2", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SEC_TDM_RX_3", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SEC_TDM_RX_4", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SEC_TDM_RX_5", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SEC_TDM_RX_6", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SEC_TDM_RX_7", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SEC_TDM_TX_0", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SEC_TDM_TX_1", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SEC_TDM_TX_2", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SEC_TDM_TX_3", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SEC_TDM_TX_4", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SEC_TDM_TX_5", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SEC_TDM_TX_6", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("SEC_TDM_TX_7", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 
 	SND_SOC_DAPM_AIF_IN("TERT_TDM_RX_0", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("TERT_TDM_RX_1", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("TERT_TDM_RX_2", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("TERT_TDM_RX_3", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("TERT_TDM_RX_4", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("TERT_TDM_RX_5", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("TERT_TDM_RX_6", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("TERT_TDM_RX_7", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("TERT_TDM_TX_0", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("TERT_TDM_TX_1", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("TERT_TDM_TX_2", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("TERT_TDM_TX_3", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("TERT_TDM_TX_4", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("TERT_TDM_TX_5", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("TERT_TDM_TX_6", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("TERT_TDM_TX_7", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 
 	SND_SOC_DAPM_AIF_IN("QUAT_TDM_RX_0", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUAT_TDM_RX_1", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUAT_TDM_RX_2", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUAT_TDM_RX_3", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUAT_TDM_RX_4", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUAT_TDM_RX_5", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUAT_TDM_RX_6", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUAT_TDM_RX_7", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUAT_TDM_TX_0", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUAT_TDM_TX_1", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUAT_TDM_TX_2", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUAT_TDM_TX_3", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUAT_TDM_TX_4", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUAT_TDM_TX_5", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUAT_TDM_TX_6", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUAT_TDM_TX_7", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 
 	SND_SOC_DAPM_AIF_IN("QUIN_TDM_RX_0", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUIN_TDM_RX_1", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUIN_TDM_RX_2", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUIN_TDM_RX_3", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUIN_TDM_RX_4", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUIN_TDM_RX_5", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUIN_TDM_RX_6", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("QUIN_TDM_RX_7", NULL,
-			     0, 0, 0, 0),
+			     0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUIN_TDM_TX_0", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUIN_TDM_TX_1", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUIN_TDM_TX_2", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUIN_TDM_TX_3", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUIN_TDM_TX_4", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUIN_TDM_TX_5", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUIN_TDM_TX_6", NULL,
-						0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_OUT("QUIN_TDM_TX_7", NULL,
-						0, 0, 0, 0),
-	SND_SOC_DAPM_AIF_OUT("DISPLAY_PORT_RX", "NULL", 0, 0, 0, 0),
+						0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_OUT("DISPLAY_PORT_RX", "NULL", 0, SND_SOC_NOPM, 0, 0),
 };
 
 static const struct snd_soc_component_driver q6afe_dai_component = {
-- 
GitLab


From 796a58fe2b8c9b6668db00d92512ec84be663027 Mon Sep 17 00:00:00 2001
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Date: Tue, 11 Aug 2020 13:02:05 +0100
Subject: [PATCH 0070/1341] ASoC: q6routing: add dummy register read/write
 function

Most of the DAPM widgets for DSP ASoC components reuse reg field
of the widgets for its internal calculations, however these are not
real registers. So read/writes to these numbers are not really
valid. However ASoC core will read these registers to get default
state during startup.

With recent changes to ASoC core, every register read/write
failures are reported very verbosely. Prior to this fails to reads
are totally ignored, so we never saw any error messages.

To fix this add dummy read/write function to return default value.

Fixes: e3a33673e845 ("ASoC: qdsp6: q6routing: Add q6routing driver")
Reported-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20200811120205.21805-2-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/qcom/qdsp6/q6routing.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/sound/soc/qcom/qdsp6/q6routing.c b/sound/soc/qcom/qdsp6/q6routing.c
index eaa95b5a7b663..25d23e0266c7e 100644
--- a/sound/soc/qcom/qdsp6/q6routing.c
+++ b/sound/soc/qcom/qdsp6/q6routing.c
@@ -973,6 +973,20 @@ static int msm_routing_probe(struct snd_soc_component *c)
 	return 0;
 }
 
+static unsigned int q6routing_reg_read(struct snd_soc_component *component,
+				       unsigned int reg)
+{
+	/* default value */
+	return 0;
+}
+
+static int q6routing_reg_write(struct snd_soc_component *component,
+			       unsigned int reg, unsigned int val)
+{
+	/* dummy */
+	return 0;
+}
+
 static const struct snd_soc_component_driver msm_soc_routing_component = {
 	.probe = msm_routing_probe,
 	.name = DRV_NAME,
@@ -981,6 +995,8 @@ static const struct snd_soc_component_driver msm_soc_routing_component = {
 	.num_dapm_widgets = ARRAY_SIZE(msm_qdsp6_widgets),
 	.dapm_routes = intercon,
 	.num_dapm_routes = ARRAY_SIZE(intercon),
+	.read = q6routing_reg_read,
+	.write = q6routing_reg_write,
 };
 
 static int q6pcm_routing_probe(struct platform_device *pdev)
-- 
GitLab


From f70fff83cda63bbf596f99edc131b9daaba07458 Mon Sep 17 00:00:00 2001
From: Mike Pozulp <pozulp.kernel@gmail.com>
Date: Thu, 13 Aug 2020 21:53:44 -0700
Subject: [PATCH 0071/1341] ALSA: hda/realtek: Add quirk for Samsung Galaxy
 Flex Book

The Flex Book uses the same ALC298 codec as other Samsung laptops which
have the no headphone sound bug, like my Samsung Notebook. The Flex Book
owner used Early Patching to confirm that this quirk fixes the bug.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207423
Signed-off-by: Mike Pozulp <pozulp.kernel@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200814045346.645367-1-pozulp.kernel@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_realtek.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 7f9d352737349..167b6fd6842d9 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -7694,6 +7694,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x144d, 0xc109, "Samsung Ativ book 9 (NP900X3G)", ALC269_FIXUP_INV_DMIC),
 	SND_PCI_QUIRK(0x144d, 0xc169, "Samsung Notebook 9 Pen (NP930SBE-K01US)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x144d, 0xc176, "Samsung Notebook 9 Pro (NP930MBE-K04US)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
+	SND_PCI_QUIRK(0x144d, 0xc189, "Samsung Galaxy Flex Book (NT950QCG-X716)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x144d, 0xc740, "Samsung Ativ book 8 (NP870Z5G)", ALC269_FIXUP_ATIV_BOOK_8),
 	SND_PCI_QUIRK(0x144d, 0xc812, "Samsung Notebook Pen S (NT950SBE-X58)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x1458, 0xfa53, "Gigabyte BXBT-2807", ALC283_FIXUP_HEADSET_MIC),
-- 
GitLab


From 9420139f516d7fbc248ce17f35275cb005ed98ea Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Fri, 14 Aug 2020 12:26:24 +0200
Subject: [PATCH 0072/1341] dma-pool: fix coherent pool allocations for IOMMU
 mappings

When allocating coherent pool memory for an IOMMU mapping we don't care
about the DMA mask.  Move the guess for the initial GFP mask into the
dma_direct_alloc_pages and pass dma_coherent_ok as a function pointer
argument so that it doesn't get applied to the IOMMU case.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Amit Pundir <amit.pundir@linaro.org>
---
 drivers/iommu/dma-iommu.c   |   4 +-
 include/linux/dma-direct.h  |   3 -
 include/linux/dma-mapping.h |   5 +-
 kernel/dma/direct.c         |  13 ++--
 kernel/dma/pool.c           | 114 +++++++++++++++---------------------
 5 files changed, 62 insertions(+), 77 deletions(-)

diff --git a/drivers/iommu/dma-iommu.c b/drivers/iommu/dma-iommu.c
index 4959f5df21bd0..5141d49a046ba 100644
--- a/drivers/iommu/dma-iommu.c
+++ b/drivers/iommu/dma-iommu.c
@@ -1035,8 +1035,8 @@ static void *iommu_dma_alloc(struct device *dev, size_t size,
 
 	if (IS_ENABLED(CONFIG_DMA_DIRECT_REMAP) &&
 	    !gfpflags_allow_blocking(gfp) && !coherent)
-		cpu_addr = dma_alloc_from_pool(dev, PAGE_ALIGN(size), &page,
-					       gfp);
+		page = dma_alloc_from_pool(dev, PAGE_ALIGN(size), &cpu_addr,
+					       gfp, NULL);
 	else
 		cpu_addr = iommu_dma_alloc_pages(dev, size, &page, gfp, attrs);
 	if (!cpu_addr)
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
index 5a3ce2a247943..6e87225600ae3 100644
--- a/include/linux/dma-direct.h
+++ b/include/linux/dma-direct.h
@@ -73,9 +73,6 @@ static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size,
 }
 
 u64 dma_direct_get_required_mask(struct device *dev);
-gfp_t dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
-				  u64 *phys_mask);
-bool dma_coherent_ok(struct device *dev, phys_addr_t phys, size_t size);
 void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
 		gfp_t gfp, unsigned long attrs);
 void dma_direct_free(struct device *dev, size_t size, void *cpu_addr,
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 016b96b384bdd..52635e91143b2 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -522,8 +522,9 @@ void *dma_common_pages_remap(struct page **pages, size_t size,
 			pgprot_t prot, const void *caller);
 void dma_common_free_remap(void *cpu_addr, size_t size);
 
-void *dma_alloc_from_pool(struct device *dev, size_t size,
-			  struct page **ret_page, gfp_t flags);
+struct page *dma_alloc_from_pool(struct device *dev, size_t size,
+		void **cpu_addr, gfp_t flags,
+		bool (*phys_addr_ok)(struct device *, phys_addr_t, size_t));
 bool dma_free_from_pool(struct device *dev, void *start, size_t size);
 
 int
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index bb0041e996597..db6ef07aec3b3 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -43,7 +43,7 @@ u64 dma_direct_get_required_mask(struct device *dev)
 	return (1ULL << (fls64(max_dma) - 1)) * 2 - 1;
 }
 
-gfp_t dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
+static gfp_t dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
 				  u64 *phys_limit)
 {
 	u64 dma_limit = min_not_zero(dma_mask, dev->bus_dma_limit);
@@ -68,7 +68,7 @@ gfp_t dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
 	return 0;
 }
 
-bool dma_coherent_ok(struct device *dev, phys_addr_t phys, size_t size)
+static bool dma_coherent_ok(struct device *dev, phys_addr_t phys, size_t size)
 {
 	return phys_to_dma_direct(dev, phys) + size - 1 <=
 			min_not_zero(dev->coherent_dma_mask, dev->bus_dma_limit);
@@ -161,8 +161,13 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size,
 	size = PAGE_ALIGN(size);
 
 	if (dma_should_alloc_from_pool(dev, gfp, attrs)) {
-		ret = dma_alloc_from_pool(dev, size, &page, gfp);
-		if (!ret)
+		u64 phys_mask;
+
+		gfp |= dma_direct_optimal_gfp_mask(dev, dev->coherent_dma_mask,
+				&phys_mask);
+		page = dma_alloc_from_pool(dev, size, &ret, gfp,
+				dma_coherent_ok);
+		if (!page)
 			return NULL;
 		goto done;
 	}
diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c
index 6bc74a2d51273..5d071d4a3cbaa 100644
--- a/kernel/dma/pool.c
+++ b/kernel/dma/pool.c
@@ -196,93 +196,75 @@ static int __init dma_atomic_pool_init(void)
 }
 postcore_initcall(dma_atomic_pool_init);
 
-static inline struct gen_pool *dma_guess_pool_from_device(struct device *dev)
+static inline struct gen_pool *dma_guess_pool(struct gen_pool *prev, gfp_t gfp)
 {
-	u64 phys_mask;
-	gfp_t gfp;
-
-	gfp = dma_direct_optimal_gfp_mask(dev, dev->coherent_dma_mask,
-					  &phys_mask);
-	if (IS_ENABLED(CONFIG_ZONE_DMA) && gfp == GFP_DMA)
+	if (prev == NULL) {
+		if (IS_ENABLED(CONFIG_ZONE_DMA32) && (gfp & GFP_DMA32))
+			return atomic_pool_dma32;
+		if (IS_ENABLED(CONFIG_ZONE_DMA) && (gfp & GFP_DMA))
+			return atomic_pool_dma;
+		return atomic_pool_kernel;
+	}
+	if (prev == atomic_pool_kernel)
+		return atomic_pool_dma32 ? atomic_pool_dma32 : atomic_pool_dma;
+	if (prev == atomic_pool_dma32)
 		return atomic_pool_dma;
-	if (IS_ENABLED(CONFIG_ZONE_DMA32) && gfp == GFP_DMA32)
-		return atomic_pool_dma32;
-	return atomic_pool_kernel;
+	return NULL;
 }
 
-static inline struct gen_pool *dma_get_safer_pool(struct gen_pool *bad_pool)
+static struct page *__dma_alloc_from_pool(struct device *dev, size_t size,
+		struct gen_pool *pool, void **cpu_addr,
+		bool (*phys_addr_ok)(struct device *, phys_addr_t, size_t))
 {
-	if (bad_pool == atomic_pool_kernel)
-		return atomic_pool_dma32 ? : atomic_pool_dma;
+	unsigned long addr;
+	phys_addr_t phys;
 
-	if (bad_pool == atomic_pool_dma32)
-		return atomic_pool_dma;
+	addr = gen_pool_alloc(pool, size);
+	if (!addr)
+		return NULL;
 
-	return NULL;
-}
+	phys = gen_pool_virt_to_phys(pool, addr);
+	if (phys_addr_ok && !phys_addr_ok(dev, phys, size)) {
+		gen_pool_free(pool, addr, size);
+		return NULL;
+	}
 
-static inline struct gen_pool *dma_guess_pool(struct device *dev,
-					      struct gen_pool *bad_pool)
-{
-	if (bad_pool)
-		return dma_get_safer_pool(bad_pool);
+	if (gen_pool_avail(pool) < atomic_pool_size)
+		schedule_work(&atomic_pool_work);
 
-	return dma_guess_pool_from_device(dev);
+	*cpu_addr = (void *)addr;
+	memset(*cpu_addr, 0, size);
+	return pfn_to_page(__phys_to_pfn(phys));
 }
 
-void *dma_alloc_from_pool(struct device *dev, size_t size,
-			  struct page **ret_page, gfp_t flags)
+struct page *dma_alloc_from_pool(struct device *dev, size_t size,
+		void **cpu_addr, gfp_t gfp,
+		bool (*phys_addr_ok)(struct device *, phys_addr_t, size_t))
 {
 	struct gen_pool *pool = NULL;
-	unsigned long val = 0;
-	void *ptr = NULL;
-	phys_addr_t phys;
-
-	while (1) {
-		pool = dma_guess_pool(dev, pool);
-		if (!pool) {
-			WARN(1, "Failed to get suitable pool for %s\n",
-			     dev_name(dev));
-			break;
-		}
-
-		val = gen_pool_alloc(pool, size);
-		if (!val)
-			continue;
-
-		phys = gen_pool_virt_to_phys(pool, val);
-		if (dma_coherent_ok(dev, phys, size))
-			break;
-
-		gen_pool_free(pool, val, size);
-		val = 0;
-	}
-
-
-	if (val) {
-		*ret_page = pfn_to_page(__phys_to_pfn(phys));
-		ptr = (void *)val;
-		memset(ptr, 0, size);
+	struct page *page;
 
-		if (gen_pool_avail(pool) < atomic_pool_size)
-			schedule_work(&atomic_pool_work);
+	while ((pool = dma_guess_pool(pool, gfp))) {
+		page = __dma_alloc_from_pool(dev, size, pool, cpu_addr,
+					     phys_addr_ok);
+		if (page)
+			return page;
 	}
 
-	return ptr;
+	WARN(1, "Failed to get suitable pool for %s\n", dev_name(dev));
+	return NULL;
 }
 
 bool dma_free_from_pool(struct device *dev, void *start, size_t size)
 {
 	struct gen_pool *pool = NULL;
 
-	while (1) {
-		pool = dma_guess_pool(dev, pool);
-		if (!pool)
-			return false;
-
-		if (gen_pool_has_addr(pool, (unsigned long)start, size)) {
-			gen_pool_free(pool, (unsigned long)start, size);
-			return true;
-		}
+	while ((pool = dma_guess_pool(pool, 0))) {
+		if (!gen_pool_has_addr(pool, (unsigned long)start, size))
+			continue;
+		gen_pool_free(pool, (unsigned long)start, size);
+		return true;
 	}
+
+	return false;
 }
-- 
GitLab


From d7e673ec2c8e0ea39c4c70fc490d67d7fbda869d Mon Sep 17 00:00:00 2001
From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Date: Fri, 14 Aug 2020 12:26:23 +0200
Subject: [PATCH 0073/1341] dma-pool: Only allocate from CMA when in same
 memory zone

There is no guarantee to CMA's placement, so allocating a zone specific
atomic pool from CMA might return memory from a completely different
memory zone. To get around this double check CMA's placement before
allocating from it.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 kernel/dma/pool.c | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c
index 5d071d4a3cbaa..06582b488e317 100644
--- a/kernel/dma/pool.c
+++ b/kernel/dma/pool.c
@@ -3,7 +3,9 @@
  * Copyright (C) 2012 ARM Ltd.
  * Copyright (C) 2020 Google LLC
  */
+#include <linux/cma.h>
 #include <linux/debugfs.h>
+#include <linux/dma-contiguous.h>
 #include <linux/dma-direct.h>
 #include <linux/dma-noncoherent.h>
 #include <linux/init.h>
@@ -55,6 +57,29 @@ static void dma_atomic_pool_size_add(gfp_t gfp, size_t size)
 		pool_size_kernel += size;
 }
 
+static bool cma_in_zone(gfp_t gfp)
+{
+	unsigned long size;
+	phys_addr_t end;
+	struct cma *cma;
+
+	cma = dev_get_cma_area(NULL);
+	if (!cma)
+		return false;
+
+	size = cma_get_size(cma);
+	if (!size)
+		return false;
+
+	/* CMA can't cross zone boundaries, see cma_activate_area() */
+	end = cma_get_base(cma) + size - 1;
+	if (IS_ENABLED(CONFIG_ZONE_DMA) && (gfp & GFP_DMA))
+		return end <= DMA_BIT_MASK(zone_dma_bits);
+	if (IS_ENABLED(CONFIG_ZONE_DMA32) && (gfp & GFP_DMA32))
+		return end <= DMA_BIT_MASK(32);
+	return true;
+}
+
 static int atomic_pool_expand(struct gen_pool *pool, size_t pool_size,
 			      gfp_t gfp)
 {
@@ -68,7 +93,11 @@ static int atomic_pool_expand(struct gen_pool *pool, size_t pool_size,
 
 	do {
 		pool_size = 1 << (PAGE_SHIFT + order);
-		page = alloc_pages(gfp, order);
+		if (cma_in_zone(gfp))
+			page = dma_alloc_from_contiguous(NULL, 1 << order,
+							 order, false);
+		if (!page)
+			page = alloc_pages(gfp, order);
 	} while (!page && order-- > 0);
 	if (!page)
 		goto out;
-- 
GitLab


From 470757f5b3a46bd85741bb0d8c1fd3f21048a2af Mon Sep 17 00:00:00 2001
From: Alexander Tsoy <alexander@tsoy.me>
Date: Sat, 15 Aug 2020 03:21:03 +0300
Subject: [PATCH 0074/1341] ALSA: usb-audio: Add capture support for Saffire 6
 (USB 1.1)

Capture and playback endpoints on Saffire 6 (USB 1.1) resides on the same
interface. This was not supported by the composite quirk back in the day
when initial support for this device was added, thus only playback was
enabled until now.

Fixes: 11e424e88bd4 ("ALSA: usb-audio: Add support for Focusrite Saffire 6 USB")
Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
Cc: <stable.vger.kernel.org>
Link: https://lore.kernel.org/r/20200815002103.29247-1-alexander@tsoy.me
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/quirks-table.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index d79e3ddc56901..e6202608e043f 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -2678,6 +2678,10 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 		.ifnum = QUIRK_ANY_INTERFACE,
 		.type = QUIRK_COMPOSITE,
 		.data = (const struct snd_usb_audio_quirk[]) {
+			{
+				.ifnum = 0,
+				.type = QUIRK_AUDIO_STANDARD_MIXER,
+			},
 			{
 				.ifnum = 0,
 				.type = QUIRK_AUDIO_FIXED_ENDPOINT,
@@ -2690,6 +2694,32 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 					.attributes = UAC_EP_CS_ATTR_SAMPLE_RATE,
 					.endpoint = 0x01,
 					.ep_attr = USB_ENDPOINT_XFER_ISOC,
+					.datainterval = 1,
+					.maxpacksize = 0x024c,
+					.rates = SNDRV_PCM_RATE_44100 |
+						 SNDRV_PCM_RATE_48000,
+					.rate_min = 44100,
+					.rate_max = 48000,
+					.nr_rates = 2,
+					.rate_table = (unsigned int[]) {
+						44100, 48000
+					}
+				}
+			},
+			{
+				.ifnum = 0,
+				.type = QUIRK_AUDIO_FIXED_ENDPOINT,
+				.data = &(const struct audioformat) {
+					.formats = SNDRV_PCM_FMTBIT_S24_3LE,
+					.channels = 2,
+					.iface = 0,
+					.altsetting = 1,
+					.altset_idx = 1,
+					.attributes = 0,
+					.endpoint = 0x82,
+					.ep_attr = USB_ENDPOINT_XFER_ISOC,
+					.datainterval = 1,
+					.maxpacksize = 0x0126,
 					.rates = SNDRV_PCM_RATE_44100 |
 						 SNDRV_PCM_RATE_48000,
 					.rate_min = 44100,
-- 
GitLab


From 24633d901ea44fe99bc9a2d01a3881fa097b78b3 Mon Sep 17 00:00:00 2001
From: Vaibhav Shankar <vaibhav.shankar@intel.com>
Date: Thu, 13 Aug 2020 19:22:34 -0700
Subject: [PATCH 0075/1341] perf/x86/intel/uncore: Add BW counters for GT, IA
 and IO breakdown

Linux only has support to read total DDR reads and writes. Here we
add support to enable bandwidth breakdown-GT, IA and IO. Breakdown
of BW is important to debug and optimize memory access. This can also
be used for telemetry and improving the system software.The offsets for
GT, IA and IO are added and these free running counters can be accessed
via MMIO space.

The BW breakdown can be measured using the following cmd:

  perf stat -e uncore_imc/gt_requests/,uncore_imc/ia_requests/,uncore_imc/io_requests/

             30.57 MiB  uncore_imc/gt_requests/
           1346.13 MiB  uncore_imc/ia_requests/
            190.97 MiB  uncore_imc/io_requests/

       5.984572733 seconds time elapsed

     BW/s = <gt,ia,io>_requests/time elapsed

Signed-off-by: Vaibhav Shankar <vaibhav.shankar@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200814022234.23605-1-vaibhav.shankar@intel.com
---
 arch/x86/events/intel/uncore_snb.c | 52 ++++++++++++++++++++++++++++--
 1 file changed, 49 insertions(+), 3 deletions(-)

diff --git a/arch/x86/events/intel/uncore_snb.c b/arch/x86/events/intel/uncore_snb.c
index cb94ba86efd28..6a4ca27b2c9e1 100644
--- a/arch/x86/events/intel/uncore_snb.c
+++ b/arch/x86/events/intel/uncore_snb.c
@@ -390,6 +390,18 @@ static struct uncore_event_desc snb_uncore_imc_events[] = {
 	INTEL_UNCORE_EVENT_DESC(data_writes.scale, "6.103515625e-5"),
 	INTEL_UNCORE_EVENT_DESC(data_writes.unit, "MiB"),
 
+	INTEL_UNCORE_EVENT_DESC(gt_requests, "event=0x03"),
+	INTEL_UNCORE_EVENT_DESC(gt_requests.scale, "6.103515625e-5"),
+	INTEL_UNCORE_EVENT_DESC(gt_requests.unit, "MiB"),
+
+	INTEL_UNCORE_EVENT_DESC(ia_requests, "event=0x04"),
+	INTEL_UNCORE_EVENT_DESC(ia_requests.scale, "6.103515625e-5"),
+	INTEL_UNCORE_EVENT_DESC(ia_requests.unit, "MiB"),
+
+	INTEL_UNCORE_EVENT_DESC(io_requests, "event=0x05"),
+	INTEL_UNCORE_EVENT_DESC(io_requests.scale, "6.103515625e-5"),
+	INTEL_UNCORE_EVENT_DESC(io_requests.unit, "MiB"),
+
 	{ /* end: all zeroes */ },
 };
 
@@ -405,13 +417,35 @@ static struct uncore_event_desc snb_uncore_imc_events[] = {
 #define SNB_UNCORE_PCI_IMC_DATA_WRITES_BASE	0x5054
 #define SNB_UNCORE_PCI_IMC_CTR_BASE		SNB_UNCORE_PCI_IMC_DATA_READS_BASE
 
+/* BW break down- legacy counters */
+#define SNB_UNCORE_PCI_IMC_GT_REQUESTS		0x3
+#define SNB_UNCORE_PCI_IMC_GT_REQUESTS_BASE	0x5040
+#define SNB_UNCORE_PCI_IMC_IA_REQUESTS		0x4
+#define SNB_UNCORE_PCI_IMC_IA_REQUESTS_BASE	0x5044
+#define SNB_UNCORE_PCI_IMC_IO_REQUESTS		0x5
+#define SNB_UNCORE_PCI_IMC_IO_REQUESTS_BASE	0x5048
+
 enum perf_snb_uncore_imc_freerunning_types {
-	SNB_PCI_UNCORE_IMC_DATA		= 0,
+	SNB_PCI_UNCORE_IMC_DATA_READS		= 0,
+	SNB_PCI_UNCORE_IMC_DATA_WRITES,
+	SNB_PCI_UNCORE_IMC_GT_REQUESTS,
+	SNB_PCI_UNCORE_IMC_IA_REQUESTS,
+	SNB_PCI_UNCORE_IMC_IO_REQUESTS,
+
 	SNB_PCI_UNCORE_IMC_FREERUNNING_TYPE_MAX,
 };
 
 static struct freerunning_counters snb_uncore_imc_freerunning[] = {
-	[SNB_PCI_UNCORE_IMC_DATA]     = { SNB_UNCORE_PCI_IMC_DATA_READS_BASE, 0x4, 0x0, 2, 32 },
+	[SNB_PCI_UNCORE_IMC_DATA_READS]		= { SNB_UNCORE_PCI_IMC_DATA_READS_BASE,
+							0x0, 0x0, 1, 32 },
+	[SNB_PCI_UNCORE_IMC_DATA_READS]		= { SNB_UNCORE_PCI_IMC_DATA_WRITES_BASE,
+							0x0, 0x0, 1, 32 },
+	[SNB_PCI_UNCORE_IMC_GT_REQUESTS]	= { SNB_UNCORE_PCI_IMC_GT_REQUESTS_BASE,
+							0x0, 0x0, 1, 32 },
+	[SNB_PCI_UNCORE_IMC_IA_REQUESTS]	= { SNB_UNCORE_PCI_IMC_IA_REQUESTS_BASE,
+							0x0, 0x0, 1, 32 },
+	[SNB_PCI_UNCORE_IMC_IO_REQUESTS]	= { SNB_UNCORE_PCI_IMC_IO_REQUESTS_BASE,
+							0x0, 0x0, 1, 32 },
 };
 
 static struct attribute *snb_uncore_imc_formats_attr[] = {
@@ -525,6 +559,18 @@ static int snb_uncore_imc_event_init(struct perf_event *event)
 		base = SNB_UNCORE_PCI_IMC_DATA_WRITES_BASE;
 		idx = UNCORE_PMC_IDX_FREERUNNING;
 		break;
+	case SNB_UNCORE_PCI_IMC_GT_REQUESTS:
+		base = SNB_UNCORE_PCI_IMC_GT_REQUESTS_BASE;
+		idx = UNCORE_PMC_IDX_FREERUNNING;
+		break;
+	case SNB_UNCORE_PCI_IMC_IA_REQUESTS:
+		base = SNB_UNCORE_PCI_IMC_IA_REQUESTS_BASE;
+		idx = UNCORE_PMC_IDX_FREERUNNING;
+		break;
+	case SNB_UNCORE_PCI_IMC_IO_REQUESTS:
+		base = SNB_UNCORE_PCI_IMC_IO_REQUESTS_BASE;
+		idx = UNCORE_PMC_IDX_FREERUNNING;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -598,7 +644,7 @@ static struct intel_uncore_ops snb_uncore_imc_ops = {
 
 static struct intel_uncore_type snb_uncore_imc = {
 	.name		= "imc",
-	.num_counters   = 2,
+	.num_counters   = 5,
 	.num_boxes	= 1,
 	.num_freerunning_types	= SNB_PCI_UNCORE_IMC_FREERUNNING_TYPE_MAX,
 	.mmio_map_size	= SNB_UNCORE_PCI_IMC_MAP_SIZE,
-- 
GitLab


From f5d0f820ff8ae7349f9615e686cfc7b0e36211d9 Mon Sep 17 00:00:00 2001
From: Liang Wang <wangliang101@huawei.com>
Date: Sun, 16 Aug 2020 15:13:09 +0800
Subject: [PATCH 0076/1341] ALSA: isa: fix spelling mistakes in the comments

Fix spelling mistakes in the comments:
	initailise ==> initialise
	tranfer ==> transfer
	Initialse ==> Initialise

Signed-off-by: Liang Wang <wangliang101@huawei.com>
Link: https://lore.kernel.org/r/20200816071309.121461-1-wangliang101@huawei.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/isa/sscape.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/isa/sscape.c b/sound/isa/sscape.c
index 5363d88cc4b93..2e5a5c5279e8d 100644
--- a/sound/isa/sscape.c
+++ b/sound/isa/sscape.c
@@ -308,7 +308,7 @@ static inline int verify_mpu401(const struct snd_mpu401 *mpu)
 }
 
 /*
- * This is apparently the standard way to initailise an MPU-401
+ * This is apparently the standard way to initialise an MPU-401
  */
 static inline void initialise_mpu401(const struct snd_mpu401 *mpu)
 {
@@ -339,7 +339,7 @@ static void soundscape_free(struct snd_card *c)
 }
 
 /*
- * Tell the SoundScape to begin a DMA tranfer using the given channel.
+ * Tell the SoundScape to begin a DMA transfer using the given channel.
  * All locking issues are left to the caller.
  */
 static void sscape_start_dma_unsafe(unsigned io_base, enum GA_REG reg)
@@ -803,7 +803,7 @@ static int mpu401_open(struct snd_mpu401 *mpu)
 }
 
 /*
- * Initialse an MPU-401 subdevice for MIDI support on the SoundScape.
+ * Initialise an MPU-401 subdevice for MIDI support on the SoundScape.
  */
 static int create_mpu401(struct snd_card *card, int devnum,
 			 unsigned long port, int irq)
-- 
GitLab


From 34b09af4f54e6485e28f138ccad159611a240cc1 Mon Sep 17 00:00:00 2001
From: "J. Bruce Fields" <bfields@redhat.com>
Date: Wed, 5 Aug 2020 15:10:11 -0400
Subject: [PATCH 0077/1341] nfsd: fix oops on mixed NFSv4/NFSv3 client access

If an NFSv2/v3 client breaks an NFSv4 client's delegation, it will hit a
NULL dereference in nfsd_breaker_owns_lease().

Easily reproduceable with for example

	mount -overs=4.2 server:/export /mnt/
	sleep 1h </mnt/file &
	mount -overs=3 server:/export /mnt2/
	touch /mnt2/file

Reported-by: Robert Dinse <nanook@eskimo.com>
Fixes: 28df3d1539de50 ("nfsd: clients don't need to break their own delegations")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208807
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfs4state.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 81ed8e8bab3fc..1ea9bbcc7c248 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -4597,6 +4597,8 @@ static bool nfsd_breaker_owns_lease(struct file_lock *fl)
 	if (!i_am_nfsd())
 		return NULL;
 	rqst = kthread_data(current);
+	if (!rqst->rq_lease_breaker)
+		return NULL;
 	clp = *(rqst->rq_lease_breaker);
 	return dl->dl_stid.sc_client == clp;
 }
-- 
GitLab


From 4473171db68fe9e3de3f2bc68a00527f23852ad8 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:14 +0530
Subject: [PATCH 0078/1341] firmware: ti_sci: Drop the device id to resource
 type translation

With ABI 3.0, sysfw deprecated special resource types used for AM65x
SoC. Instead started using device id as resource type similar to the
convention used in J721E SOC.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20200806074826.24607-2-lokeshvutla@ti.com
---
 drivers/firmware/ti_sci.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index 53cee17d01158..81e4d7797ac09 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -3355,16 +3355,6 @@ static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = {
 	.rm_type_map = NULL,
 };
 
-static struct ti_sci_rm_type_map ti_sci_am654_rm_type_map[] = {
-	{.dev_id = 56, .type = 0x00b}, /* GIC_IRQ */
-	{.dev_id = 179, .type = 0x000}, /* MAIN_NAV_UDMASS_IA0 */
-	{.dev_id = 187, .type = 0x009}, /* MAIN_NAV_RA */
-	{.dev_id = 188, .type = 0x006}, /* MAIN_NAV_UDMAP */
-	{.dev_id = 194, .type = 0x007}, /* MCU_NAV_UDMAP */
-	{.dev_id = 195, .type = 0x00a}, /* MCU_NAV_RA */
-	{.dev_id = 0, .type = 0x000}, /* end of table */
-};
-
 /* Description for AM654 */
 static const struct ti_sci_desc ti_sci_pmmc_am654_desc = {
 	.default_host_id = 12,
@@ -3373,7 +3363,7 @@ static const struct ti_sci_desc ti_sci_pmmc_am654_desc = {
 	/* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */
 	.max_msgs = 20,
 	.max_msg_size = 60,
-	.rm_type_map = ti_sci_am654_rm_type_map,
+	.rm_type_map = NULL,
 };
 
 static const struct of_device_id ti_sci_of_match[] = {
-- 
GitLab


From 9b98e02a3d369c5d0875338ea0717030471b5210 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:15 +0530
Subject: [PATCH 0079/1341] firmware: ti_sci: Drop unused structure
 ti_sci_rm_type_map

struct ti_sci_rm_type_map is no longer used. Drop its definition and its
declarations.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20200806074826.24607-3-lokeshvutla@ti.com
---
 drivers/firmware/ti_sci.c | 56 +--------------------------------------
 1 file changed, 1 insertion(+), 55 deletions(-)

diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index 81e4d7797ac09..03bd01ba5fe7f 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -64,22 +64,6 @@ struct ti_sci_xfers_info {
 	spinlock_t xfer_lock;
 };
 
-/**
- * struct ti_sci_rm_type_map - Structure representing TISCI Resource
- *				management representation of dev_ids.
- * @dev_id:	TISCI device ID
- * @type:	Corresponding id as identified by TISCI RM.
- *
- * Note: This is used only as a work around for using RM range apis
- *	for AM654 SoC. For future SoCs dev_id will be used as type
- *	for RM range APIs. In order to maintain ABI backward compatibility
- *	type is not being changed for AM654 SoC.
- */
-struct ti_sci_rm_type_map {
-	u32 dev_id;
-	u16 type;
-};
-
 /**
  * struct ti_sci_desc - Description of SoC integration
  * @default_host_id:	Host identifier representing the compute entity
@@ -87,14 +71,12 @@ struct ti_sci_rm_type_map {
  * @max_msgs: Maximum number of messages that can be pending
  *		  simultaneously in the system
  * @max_msg_size: Maximum size of data per message that can be handled.
- * @rm_type_map: RM resource type mapping structure.
  */
 struct ti_sci_desc {
 	u8 default_host_id;
 	int max_rx_timeout_ms;
 	int max_msgs;
 	int max_msg_size;
-	struct ti_sci_rm_type_map *rm_type_map;
 };
 
 /**
@@ -1710,33 +1692,6 @@ static int ti_sci_cmd_core_reboot(const struct ti_sci_handle *handle)
 	return ret;
 }
 
-static int ti_sci_get_resource_type(struct ti_sci_info *info, u16 dev_id,
-				    u16 *type)
-{
-	struct ti_sci_rm_type_map *rm_type_map = info->desc->rm_type_map;
-	bool found = false;
-	int i;
-
-	/* If map is not provided then assume dev_id is used as type */
-	if (!rm_type_map) {
-		*type = dev_id;
-		return 0;
-	}
-
-	for (i = 0; rm_type_map[i].dev_id; i++) {
-		if (rm_type_map[i].dev_id == dev_id) {
-			*type = rm_type_map[i].type;
-			found = true;
-			break;
-		}
-	}
-
-	if (!found)
-		return -EINVAL;
-
-	return 0;
-}
-
 /**
  * ti_sci_get_resource_range - Helper to get a range of resources assigned
  *			       to a host. Resource is uniquely identified by
@@ -1760,7 +1715,6 @@ static int ti_sci_get_resource_range(const struct ti_sci_handle *handle,
 	struct ti_sci_xfer *xfer;
 	struct ti_sci_info *info;
 	struct device *dev;
-	u16 type;
 	int ret = 0;
 
 	if (IS_ERR(handle))
@@ -1780,15 +1734,9 @@ static int ti_sci_get_resource_range(const struct ti_sci_handle *handle,
 		return ret;
 	}
 
-	ret = ti_sci_get_resource_type(info, dev_id, &type);
-	if (ret) {
-		dev_err(dev, "rm type lookup failed for %u\n", dev_id);
-		goto fail;
-	}
-
 	req = (struct ti_sci_msg_req_get_resource_range *)xfer->xfer_buf;
 	req->secondary_host = s_host;
-	req->type = type & MSG_RM_RESOURCE_TYPE_MASK;
+	req->type = dev_id & MSG_RM_RESOURCE_TYPE_MASK;
 	req->subtype = subtype & MSG_RM_RESOURCE_SUBTYPE_MASK;
 
 	ret = ti_sci_do_xfer(info, xfer);
@@ -3352,7 +3300,6 @@ static const struct ti_sci_desc ti_sci_pmmc_k2g_desc = {
 	/* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */
 	.max_msgs = 20,
 	.max_msg_size = 64,
-	.rm_type_map = NULL,
 };
 
 /* Description for AM654 */
@@ -3363,7 +3310,6 @@ static const struct ti_sci_desc ti_sci_pmmc_am654_desc = {
 	/* Limited by MBOX_TX_QUEUE_LEN. K2G can handle upto 128 messages! */
 	.max_msgs = 20,
 	.max_msg_size = 60,
-	.rm_type_map = NULL,
 };
 
 static const struct of_device_id ti_sci_of_match[] = {
-- 
GitLab


From 53bf2b0e4e4c1ff0a957474237f9dcd20036ca54 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:16 +0530
Subject: [PATCH 0080/1341] firmware: ti_sci: Add support for getting resource
 with subtype

With SYSFW ABI 3.0 changes, interrupts coming out of an interrupt
controller is identified by a type and it is consistent across SoCs.
Similarly global events for Interrupt aggregator. So add an API to get
resource range using a resource type.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20200806074826.24607-4-lokeshvutla@ti.com
---
 drivers/firmware/ti_sci.c              | 89 +++++++++++++++++++-------
 include/linux/soc/ti/ti_sci_protocol.h | 13 ++++
 2 files changed, 80 insertions(+), 22 deletions(-)

diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index 03bd01ba5fe7f..722af9ee53d65 100644
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -3208,61 +3208,50 @@ u32 ti_sci_get_num_resources(struct ti_sci_resource *res)
 EXPORT_SYMBOL_GPL(ti_sci_get_num_resources);
 
 /**
- * devm_ti_sci_get_of_resource() - Get a TISCI resource assigned to a device
+ * devm_ti_sci_get_resource_sets() - Get a TISCI resources assigned to a device
  * @handle:	TISCI handle
  * @dev:	Device pointer to which the resource is assigned
  * @dev_id:	TISCI device id to which the resource is assigned
- * @of_prop:	property name by which the resource are represented
+ * @sub_types:	Array of sub_types assigned corresponding to device
+ * @sets:	Number of sub_types
  *
  * Return: Pointer to ti_sci_resource if all went well else appropriate
  *	   error pointer.
  */
-struct ti_sci_resource *
-devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
-			    struct device *dev, u32 dev_id, char *of_prop)
+static struct ti_sci_resource *
+devm_ti_sci_get_resource_sets(const struct ti_sci_handle *handle,
+			      struct device *dev, u32 dev_id, u32 *sub_types,
+			      u32 sets)
 {
 	struct ti_sci_resource *res;
 	bool valid_set = false;
-	u32 resource_subtype;
 	int i, ret;
 
 	res = devm_kzalloc(dev, sizeof(*res), GFP_KERNEL);
 	if (!res)
 		return ERR_PTR(-ENOMEM);
 
-	ret = of_property_count_elems_of_size(dev_of_node(dev), of_prop,
-					      sizeof(u32));
-	if (ret < 0) {
-		dev_err(dev, "%s resource type ids not available\n", of_prop);
-		return ERR_PTR(ret);
-	}
-	res->sets = ret;
-
+	res->sets = sets;
 	res->desc = devm_kcalloc(dev, res->sets, sizeof(*res->desc),
 				 GFP_KERNEL);
 	if (!res->desc)
 		return ERR_PTR(-ENOMEM);
 
 	for (i = 0; i < res->sets; i++) {
-		ret = of_property_read_u32_index(dev_of_node(dev), of_prop, i,
-						 &resource_subtype);
-		if (ret)
-			return ERR_PTR(-EINVAL);
-
 		ret = handle->ops.rm_core_ops.get_range(handle, dev_id,
-							resource_subtype,
+							sub_types[i],
 							&res->desc[i].start,
 							&res->desc[i].num);
 		if (ret) {
 			dev_dbg(dev, "dev = %d subtype %d not allocated for this host\n",
-				dev_id, resource_subtype);
+				dev_id, sub_types[i]);
 			res->desc[i].start = 0;
 			res->desc[i].num = 0;
 			continue;
 		}
 
 		dev_dbg(dev, "dev = %d, subtype = %d, start = %d, num = %d\n",
-			dev_id, resource_subtype, res->desc[i].start,
+			dev_id, sub_types[i], res->desc[i].start,
 			res->desc[i].num);
 
 		valid_set = true;
@@ -3280,6 +3269,62 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
 	return ERR_PTR(-EINVAL);
 }
 
+/**
+ * devm_ti_sci_get_of_resource() - Get a TISCI resource assigned to a device
+ * @handle:	TISCI handle
+ * @dev:	Device pointer to which the resource is assigned
+ * @dev_id:	TISCI device id to which the resource is assigned
+ * @of_prop:	property name by which the resource are represented
+ *
+ * Return: Pointer to ti_sci_resource if all went well else appropriate
+ *	   error pointer.
+ */
+struct ti_sci_resource *
+devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
+			    struct device *dev, u32 dev_id, char *of_prop)
+{
+	struct ti_sci_resource *res;
+	u32 *sub_types;
+	int sets;
+
+	sets = of_property_count_elems_of_size(dev_of_node(dev), of_prop,
+					       sizeof(u32));
+	if (sets < 0) {
+		dev_err(dev, "%s resource type ids not available\n", of_prop);
+		return ERR_PTR(sets);
+	}
+
+	sub_types = kcalloc(sets, sizeof(*sub_types), GFP_KERNEL);
+	if (!sub_types)
+		return ERR_PTR(-ENOMEM);
+
+	of_property_read_u32_array(dev_of_node(dev), of_prop, sub_types, sets);
+	res = devm_ti_sci_get_resource_sets(handle, dev, dev_id, sub_types,
+					    sets);
+
+	kfree(sub_types);
+	return res;
+}
+EXPORT_SYMBOL_GPL(devm_ti_sci_get_of_resource);
+
+/**
+ * devm_ti_sci_get_resource() - Get a resource range assigned to the device
+ * @handle:	TISCI handle
+ * @dev:	Device pointer to which the resource is assigned
+ * @dev_id:	TISCI device id to which the resource is assigned
+ * @suub_type:	TISCI resource subytpe representing the resource.
+ *
+ * Return: Pointer to ti_sci_resource if all went well else appropriate
+ *	   error pointer.
+ */
+struct ti_sci_resource *
+devm_ti_sci_get_resource(const struct ti_sci_handle *handle, struct device *dev,
+			 u32 dev_id, u32 sub_type)
+{
+	return devm_ti_sci_get_resource_sets(handle, dev, dev_id, &sub_type, 1);
+}
+EXPORT_SYMBOL_GPL(devm_ti_sci_get_resource);
+
 static int tisci_reboot_handler(struct notifier_block *nb, unsigned long mode,
 				void *cmd)
 {
diff --git a/include/linux/soc/ti/ti_sci_protocol.h b/include/linux/soc/ti/ti_sci_protocol.h
index 49c5d29cd33c8..cf27b080e1482 100644
--- a/include/linux/soc/ti/ti_sci_protocol.h
+++ b/include/linux/soc/ti/ti_sci_protocol.h
@@ -220,6 +220,9 @@ struct ti_sci_rm_core_ops {
 				    u16 *range_start, u16 *range_num);
 };
 
+#define TI_SCI_RESASG_SUBTYPE_IR_OUTPUT		0
+#define TI_SCI_RESASG_SUBTYPE_IA_VINT		0xa
+#define TI_SCI_RESASG_SUBTYPE_GLOBAL_EVENT_SEVT	0xd
 /**
  * struct ti_sci_rm_irq_ops: IRQ management operations
  * @set_irq:		Set an IRQ route between the requested source
@@ -556,6 +559,9 @@ u32 ti_sci_get_num_resources(struct ti_sci_resource *res);
 struct ti_sci_resource *
 devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
 			    struct device *dev, u32 dev_id, char *of_prop);
+struct ti_sci_resource *
+devm_ti_sci_get_resource(const struct ti_sci_handle *handle, struct device *dev,
+			 u32 dev_id, u32 sub_type);
 
 #else	/* CONFIG_TI_SCI_PROTOCOL */
 
@@ -609,6 +615,13 @@ devm_ti_sci_get_of_resource(const struct ti_sci_handle *handle,
 {
 	return ERR_PTR(-EINVAL);
 }
+
+static inline struct ti_sci_resource *
+devm_ti_sci_get_resource(const struct ti_sci_handle *handle, struct device *dev,
+			 u32 dev_id, u32 sub_type);
+{
+	return ERR_PTR(-EINVAL);
+}
 #endif	/* CONFIG_TI_SCI_PROTOCOL */
 
 #endif	/* __TISCI_PROTOCOL_H */
-- 
GitLab


From 9a8e2ae71f3553f1b6cd4e3681f04e5d0f147387 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:17 +0530
Subject: [PATCH 0081/1341] dt-bindings: irqchip: ti, sci-intr: Update bindings
 to drop the usage of gic as parent

Drop the firmware related dt-bindings and use the hardware specified
interrupt numbers within Interrupt Router. This ensures interrupt router
DT node need not assume any interrupt parent type.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200806074826.24607-5-lokeshvutla@ti.com
---
 .../interrupt-controller/ti,sci-intr.txt      | 31 ++++++++++---------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt
index 178fca08278fe..c7046f3da201a 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt
@@ -44,15 +44,17 @@ Required Properties:
 			4: If intr supports level triggered interrupts.
 - interrupt-controller:	Identifies the node as an interrupt controller
 - #interrupt-cells:	Specifies the number of cells needed to encode an
-			interrupt source. The value should be 2.
-			First cell should contain the TISCI device ID of source
-			Second cell should contain the interrupt source offset
-			within the device.
+			interrupt source. The value should be 1.
+			First cell should contain interrupt router input number
+			as specified by hardware.
 - ti,sci:		Phandle to TI-SCI compatible System controller node.
-- ti,sci-dst-id:	TISCI device ID of the destination IRQ controller.
-- ti,sci-rm-range-girq:	Array of TISCI subtype ids representing the host irqs
-			assigned to this interrupt router. Each subtype id
-			corresponds to a range of host irqs.
+- ti,sci-dev-id:	TISCI device id of interrupt controller.
+- ti,interrupt-ranges:	Set of triplets containing ranges that convert
+			the INTR output interrupt numbers to parent's
+			interrupt number. Each triplet has following entries:
+			- First entry specifies the base for intr output irq
+			- Second entry specifies the base for parent irqs
+			- Third entry specifies the limit
 
 For more details on TISCI IRQ resource management refer:
 https://downloads.ti.com/tisci/esd/latest/2_tisci_msgs/rm/rm_irq.html
@@ -62,21 +64,20 @@ Example:
 The following example demonstrates both interrupt router node and the consumer
 node(main gpio) on the AM654 SoC:
 
-main_intr: interrupt-controller0 {
+main_gpio_intr: interrupt-controller0 {
 	compatible = "ti,sci-intr";
 	ti,intr-trigger-type = <1>;
 	interrupt-controller;
 	interrupt-parent = <&gic500>;
-	#interrupt-cells = <2>;
+	#interrupt-cells = <1>;
 	ti,sci = <&dmsc>;
-	ti,sci-dst-id = <56>;
-	ti,sci-rm-range-girq = <0x1>;
+	ti,sci-dev-id = <131>;
+	ti,interrupt-ranges = <0 360 32>;
 };
 
 main_gpio0: gpio@600000 {
 	...
-	interrupt-parent = <&main_intr>;
-	interrupts = <57 256>, <57 257>, <57 258>,
-		     <57 259>, <57 260>, <57 261>;
+	interrupt-parent = <&main_gpio_intr>;
+	interrupts = <192>, <193>, <194>, <195>, <196>, <197>;
 	...
 };
-- 
GitLab


From b8713af858997c3df5bc5b48e66ac1f1bfe19779 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:18 +0530
Subject: [PATCH 0082/1341] dt-bindings: irqchip: Convert ti, sci-intr bindings
 to yaml

In order to automate the verification of DT nodes convert
ti,sci-intr.txt ti,sci-intr.yaml.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200806074826.24607-6-lokeshvutla@ti.com
---
 .../interrupt-controller/ti,sci-intr.txt      |  83 --------------
 .../interrupt-controller/ti,sci-intr.yaml     | 102 ++++++++++++++++++
 MAINTAINERS                                   |   2 +-
 3 files changed, 103 insertions(+), 84 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt
deleted file mode 100644
index c7046f3da201a..0000000000000
--- a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt
+++ /dev/null
@@ -1,83 +0,0 @@
-Texas Instruments K3 Interrupt Router
-=====================================
-
-The Interrupt Router (INTR) module provides a mechanism to mux M
-interrupt inputs to N interrupt outputs, where all M inputs are selectable
-to be driven per N output. An Interrupt Router can either handle edge triggered
-or level triggered interrupts and that is fixed in hardware.
-
-                                 Interrupt Router
-                             +----------------------+
-                             |  Inputs     Outputs  |
-        +-------+            | +------+    +-----+  |
-        | GPIO  |----------->| | irq0 |    |  0  |  |       Host IRQ
-        +-------+            | +------+    +-----+  |      controller
-                             |    .           .     |      +-------+
-        +-------+            |    .           .     |----->|  IRQ  |
-        | INTA  |----------->|    .           .     |      +-------+
-        +-------+            |    .        +-----+  |
-                             | +------+    |  N  |  |
-                             | | irqM |    +-----+  |
-                             | +------+             |
-                             |                      |
-                             +----------------------+
-
-There is one register per output (MUXCNTL_N) that controls the selection.
-Configuration of these MUXCNTL_N registers is done by a system controller
-(like the Device Memory and Security Controller on K3 AM654 SoC). System
-controller will keep track of the used and unused registers within the Router.
-Driver should request the system controller to get the range of GIC IRQs
-assigned to the requesting hosts. It is the drivers responsibility to keep
-track of Host IRQs.
-
-Communication between the host processor running an OS and the system
-controller happens through a protocol called TI System Control Interface
-(TISCI protocol). For more details refer:
-Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
-
-TISCI Interrupt Router Node:
-----------------------------
-Required Properties:
-- compatible:		Must be "ti,sci-intr".
-- ti,intr-trigger-type:	Should be one of the following:
-			1: If intr supports edge triggered interrupts.
-			4: If intr supports level triggered interrupts.
-- interrupt-controller:	Identifies the node as an interrupt controller
-- #interrupt-cells:	Specifies the number of cells needed to encode an
-			interrupt source. The value should be 1.
-			First cell should contain interrupt router input number
-			as specified by hardware.
-- ti,sci:		Phandle to TI-SCI compatible System controller node.
-- ti,sci-dev-id:	TISCI device id of interrupt controller.
-- ti,interrupt-ranges:	Set of triplets containing ranges that convert
-			the INTR output interrupt numbers to parent's
-			interrupt number. Each triplet has following entries:
-			- First entry specifies the base for intr output irq
-			- Second entry specifies the base for parent irqs
-			- Third entry specifies the limit
-
-For more details on TISCI IRQ resource management refer:
-https://downloads.ti.com/tisci/esd/latest/2_tisci_msgs/rm/rm_irq.html
-
-Example:
---------
-The following example demonstrates both interrupt router node and the consumer
-node(main gpio) on the AM654 SoC:
-
-main_gpio_intr: interrupt-controller0 {
-	compatible = "ti,sci-intr";
-	ti,intr-trigger-type = <1>;
-	interrupt-controller;
-	interrupt-parent = <&gic500>;
-	#interrupt-cells = <1>;
-	ti,sci = <&dmsc>;
-	ti,sci-dev-id = <131>;
-	ti,interrupt-ranges = <0 360 32>;
-};
-
-main_gpio0: gpio@600000 {
-	...
-	interrupt-parent = <&main_gpio_intr>;
-	interrupts = <192>, <193>, <194>, <195>, <196>, <197>;
-	...
-};
diff --git a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.yaml b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.yaml
new file mode 100644
index 0000000000000..cff6a956afb44
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.yaml
@@ -0,0 +1,102 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/ti,sci-intr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments K3 Interrupt Router
+
+maintainers:
+  - Lokesh Vutla <lokeshvutla@ti.com>
+
+allOf:
+  - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
+
+description: |
+  The Interrupt Router (INTR) module provides a mechanism to mux M
+  interrupt inputs to N interrupt outputs, where all M inputs are selectable
+  to be driven per N output. An Interrupt Router can either handle edge
+  triggered or level triggered interrupts and that is fixed in hardware.
+
+                                   Interrupt Router
+                               +----------------------+
+                               |  Inputs     Outputs  |
+          +-------+            | +------+    +-----+  |
+          | GPIO  |----------->| | irq0 |    |  0  |  |       Host IRQ
+          +-------+            | +------+    +-----+  |      controller
+                               |    .           .     |      +-------+
+          +-------+            |    .           .     |----->|  IRQ  |
+          | INTA  |----------->|    .           .     |      +-------+
+          +-------+            |    .        +-----+  |
+                               | +------+    |  N  |  |
+                               | | irqM |    +-----+  |
+                               | +------+             |
+                               |                      |
+                               +----------------------+
+
+  There is one register per output (MUXCNTL_N) that controls the selection.
+  Configuration of these MUXCNTL_N registers is done by a system controller
+  (like the Device Memory and Security Controller on K3 AM654 SoC). System
+  controller will keep track of the used and unused registers within the Router.
+  Driver should request the system controller to get the range of GIC IRQs
+  assigned to the requesting hosts. It is the drivers responsibility to keep
+  track of Host IRQs.
+
+  Communication between the host processor running an OS and the system
+  controller happens through a protocol called TI System Control Interface
+  (TISCI protocol).
+
+properties:
+  compatible:
+    const: ti,sci-intr
+
+  ti,intr-trigger-type:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [1, 4]
+    description: |
+      Should be one of the following.
+        1 = If intr supports edge triggered interrupts.
+        4 = If intr supports level triggered interrupts.
+
+  interrupt-controller: true
+
+  '#interrupt-cells':
+    const: 1
+    description: |
+      The 1st cell should contain interrupt router input hw number.
+
+  ti,interrupt-ranges:
+    $ref: /schemas/types.yaml#/definitions/uint32-matrix
+    description: |
+      Interrupt ranges that converts the INTR output hw irq numbers
+      to parents's input interrupt numbers.
+    items:
+      items:
+        - description: |
+            "output_irq" specifies the base for intr output irq
+        - description: |
+            "parent's input irq" specifies the base for parent irq
+        - description: |
+            "limit" specifies the limit for translation
+
+required:
+  - compatible
+  - ti,intr-trigger-type
+  - interrupt-controller
+  - '#interrupt-cells'
+  - ti,sci
+  - ti,sci-dev-id
+  - ti,interrupt-ranges
+
+examples:
+  - |
+    main_gpio_intr: interrupt-controller0 {
+        compatible = "ti,sci-intr";
+        ti,intr-trigger-type = <1>;
+        interrupt-controller;
+        interrupt-parent = <&gic500>;
+        #interrupt-cells = <1>;
+        ti,sci = <&dmsc>;
+        ti,sci-dev-id = <131>;
+        ti,interrupt-ranges = <0 360 32>;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index deaafb617361c..e08405c2c22e2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -17117,7 +17117,7 @@ F:	Documentation/devicetree/bindings/arm/keystone/ti,k3-sci-common.yaml
 F:	Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
 F:	Documentation/devicetree/bindings/clock/ti,sci-clk.txt
 F:	Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt
-F:	Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt
+F:	Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.yaml
 F:	Documentation/devicetree/bindings/reset/ti,sci-reset.txt
 F:	Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
 F:	drivers/clk/keystone/sci-clk.c
-- 
GitLab


From a5b659bd4bc7518a8e45fda5256c5e5e8d3b7c49 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:19 +0530
Subject: [PATCH 0083/1341] irqchip/ti-sci-intr: Add support for INTR being a
 parent to INTR

Driver assumes that Interrupt parent to Interrupt router is always GIC.
This is not true always and an Interrupt Router can be a parent to
Interrupt Router. Update the driver to detect the parent and request the
parent irqs accordingly.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200806074826.24607-7-lokeshvutla@ti.com
---
 drivers/irqchip/irq-ti-sci-intr.c | 152 ++++++++++++++++++------------
 1 file changed, 93 insertions(+), 59 deletions(-)

diff --git a/drivers/irqchip/irq-ti-sci-intr.c b/drivers/irqchip/irq-ti-sci-intr.c
index 5ea148faf2abc..cbc1758228d9e 100644
--- a/drivers/irqchip/irq-ti-sci-intr.c
+++ b/drivers/irqchip/irq-ti-sci-intr.c
@@ -17,29 +17,20 @@
 #include <linux/of_irq.h>
 #include <linux/soc/ti/ti_sci_protocol.h>
 
-#define TI_SCI_DEV_ID_MASK	0xffff
-#define TI_SCI_DEV_ID_SHIFT	16
-#define TI_SCI_IRQ_ID_MASK	0xffff
-#define TI_SCI_IRQ_ID_SHIFT	0
-#define HWIRQ_TO_DEVID(hwirq)	(((hwirq) >> (TI_SCI_DEV_ID_SHIFT)) & \
-				 (TI_SCI_DEV_ID_MASK))
-#define HWIRQ_TO_IRQID(hwirq)	((hwirq) & (TI_SCI_IRQ_ID_MASK))
-#define TO_HWIRQ(dev, index)	((((dev) & TI_SCI_DEV_ID_MASK) << \
-				 TI_SCI_DEV_ID_SHIFT) | \
-				((index) & TI_SCI_IRQ_ID_MASK))
-
 /**
  * struct ti_sci_intr_irq_domain - Structure representing a TISCI based
  *				   Interrupt Router IRQ domain.
  * @sci:	Pointer to TISCI handle
- * @dst_irq:	TISCI resource pointer representing GIC irq controller.
- * @dst_id:	TISCI device ID of the GIC irq controller.
+ * @out_irqs:	TISCI resource pointer representing INTR irqs.
+ * @dev:	Struct device pointer.
+ * @ti_sci_id:	TI-SCI device identifier
  * @type:	Specifies the trigger type supported by this Interrupt Router
  */
 struct ti_sci_intr_irq_domain {
 	const struct ti_sci_handle *sci;
-	struct ti_sci_resource *dst_irq;
-	u32 dst_id;
+	struct ti_sci_resource *out_irqs;
+	struct device *dev;
+	u32 ti_sci_id;
 	u32 type;
 };
 
@@ -70,15 +61,44 @@ static int ti_sci_intr_irq_domain_translate(struct irq_domain *domain,
 {
 	struct ti_sci_intr_irq_domain *intr = domain->host_data;
 
-	if (fwspec->param_count != 2)
+	if (fwspec->param_count != 1)
 		return -EINVAL;
 
-	*hwirq = TO_HWIRQ(fwspec->param[0], fwspec->param[1]);
+	*hwirq = fwspec->param[0];
 	*type = intr->type;
 
 	return 0;
 }
 
+/**
+ * ti_sci_intr_xlate_irq() - Translate hwirq to parent's hwirq.
+ * @intr:	IRQ domain corresponding to Interrupt Router
+ * @irq:	Hardware irq corresponding to the above irq domain
+ *
+ * Return parent irq number if translation is available else -ENOENT.
+ */
+static int ti_sci_intr_xlate_irq(struct ti_sci_intr_irq_domain *intr, u32 irq)
+{
+	struct device_node *np = dev_of_node(intr->dev);
+	u32 base, pbase, size, len;
+	const __be32 *range;
+
+	range = of_get_property(np, "ti,interrupt-ranges", &len);
+	if (!range)
+		return irq;
+
+	for (len /= sizeof(*range); len >= 3; len -= 3) {
+		base = be32_to_cpu(*range++);
+		pbase = be32_to_cpu(*range++);
+		size = be32_to_cpu(*range++);
+
+		if (base <= irq && irq < base + size)
+			return irq - base + pbase;
+	}
+
+	return -ENOENT;
+}
+
 /**
  * ti_sci_intr_irq_domain_free() - Free the specified IRQs from the domain.
  * @domain:	Domain to which the irqs belong
@@ -89,66 +109,76 @@ static void ti_sci_intr_irq_domain_free(struct irq_domain *domain,
 					unsigned int virq, unsigned int nr_irqs)
 {
 	struct ti_sci_intr_irq_domain *intr = domain->host_data;
-	struct irq_data *data, *parent_data;
-	u16 dev_id, irq_index;
+	struct irq_data *data;
+	int out_irq;
 
-	parent_data = irq_domain_get_irq_data(domain->parent, virq);
 	data = irq_domain_get_irq_data(domain, virq);
-	irq_index = HWIRQ_TO_IRQID(data->hwirq);
-	dev_id = HWIRQ_TO_DEVID(data->hwirq);
+	out_irq = (uintptr_t)data->chip_data;
 
-	intr->sci->ops.rm_irq_ops.free_irq(intr->sci, dev_id, irq_index,
-					   intr->dst_id, parent_data->hwirq);
-	ti_sci_release_resource(intr->dst_irq, parent_data->hwirq);
+	intr->sci->ops.rm_irq_ops.free_irq(intr->sci,
+					   intr->ti_sci_id, data->hwirq,
+					   intr->ti_sci_id, out_irq);
+	ti_sci_release_resource(intr->out_irqs, out_irq);
 	irq_domain_free_irqs_parent(domain, virq, 1);
 	irq_domain_reset_irq_data(data);
 }
 
 /**
- * ti_sci_intr_alloc_gic_irq() - Allocate GIC specific IRQ
+ * ti_sci_intr_alloc_parent_irq() - Allocate parent IRQ
  * @domain:	Pointer to the interrupt router IRQ domain
  * @virq:	Corresponding Linux virtual IRQ number
  * @hwirq:	Corresponding hwirq for the IRQ within this IRQ domain
  *
- * Returns 0 if all went well else appropriate error pointer.
+ * Returns parent irq if all went well else appropriate error pointer.
  */
-static int ti_sci_intr_alloc_gic_irq(struct irq_domain *domain,
-				     unsigned int virq, u32 hwirq)
+static int ti_sci_intr_alloc_parent_irq(struct irq_domain *domain,
+					unsigned int virq, u32 hwirq)
 {
 	struct ti_sci_intr_irq_domain *intr = domain->host_data;
+	struct device_node *parent_node;
 	struct irq_fwspec fwspec;
-	u16 dev_id, irq_index;
-	u16 dst_irq;
-	int err;
-
-	dev_id = HWIRQ_TO_DEVID(hwirq);
-	irq_index = HWIRQ_TO_IRQID(hwirq);
+	u16 out_irq, p_hwirq;
+	int err = 0;
 
-	dst_irq = ti_sci_get_free_resource(intr->dst_irq);
-	if (dst_irq == TI_SCI_RESOURCE_NULL)
+	out_irq = ti_sci_get_free_resource(intr->out_irqs);
+	if (out_irq == TI_SCI_RESOURCE_NULL)
 		return -EINVAL;
 
-	fwspec.fwnode = domain->parent->fwnode;
-	fwspec.param_count = 3;
-	fwspec.param[0] = 0;	/* SPI */
-	fwspec.param[1] = dst_irq - 32; /* SPI offset */
-	fwspec.param[2] = intr->type;
+	p_hwirq = ti_sci_intr_xlate_irq(intr, out_irq);
+	if (p_hwirq < 0)
+		goto err_irqs;
+
+	parent_node = of_irq_find_parent(dev_of_node(intr->dev));
+	fwspec.fwnode = of_node_to_fwnode(parent_node);
+
+	if (of_device_is_compatible(parent_node, "arm,gic-v3")) {
+		/* Parent is GIC */
+		fwspec.param_count = 3;
+		fwspec.param[0] = 0;	/* SPI */
+		fwspec.param[1] = p_hwirq - 32; /* SPI offset */
+		fwspec.param[2] = intr->type;
+	} else {
+		/* Parent is Interrupt Router */
+		fwspec.param_count = 1;
+		fwspec.param[0] = p_hwirq;
+	}
 
 	err = irq_domain_alloc_irqs_parent(domain, virq, 1, &fwspec);
 	if (err)
 		goto err_irqs;
 
-	err = intr->sci->ops.rm_irq_ops.set_irq(intr->sci, dev_id, irq_index,
-						intr->dst_id, dst_irq);
+	err = intr->sci->ops.rm_irq_ops.set_irq(intr->sci,
+						intr->ti_sci_id, hwirq,
+						intr->ti_sci_id, out_irq);
 	if (err)
 		goto err_msg;
 
-	return 0;
+	return p_hwirq;
 
 err_msg:
 	irq_domain_free_irqs_parent(domain, virq, 1);
 err_irqs:
-	ti_sci_release_resource(intr->dst_irq, dst_irq);
+	ti_sci_release_resource(intr->out_irqs, out_irq);
 	return err;
 }
 
@@ -168,18 +198,19 @@ static int ti_sci_intr_irq_domain_alloc(struct irq_domain *domain,
 	struct irq_fwspec *fwspec = data;
 	unsigned long hwirq;
 	unsigned int flags;
-	int err;
+	int err, p_hwirq;
 
 	err = ti_sci_intr_irq_domain_translate(domain, fwspec, &hwirq, &flags);
 	if (err)
 		return err;
 
-	err = ti_sci_intr_alloc_gic_irq(domain, virq, hwirq);
-	if (err)
-		return err;
+	p_hwirq = ti_sci_intr_alloc_parent_irq(domain, virq, hwirq);
+	if (p_hwirq < 0)
+		return p_hwirq;
 
 	irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
-				      &ti_sci_intr_irq_chip, NULL);
+				      &ti_sci_intr_irq_chip,
+				      (void *)(uintptr_t)p_hwirq);
 
 	return 0;
 }
@@ -214,6 +245,7 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev)
 	if (!intr)
 		return -ENOMEM;
 
+	intr->dev = dev;
 	ret = of_property_read_u32(dev_of_node(dev), "ti,intr-trigger-type",
 				   &intr->type);
 	if (ret) {
@@ -230,19 +262,19 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = of_property_read_u32(dev_of_node(dev), "ti,sci-dst-id",
-				   &intr->dst_id);
+	ret = of_property_read_u32(dev_of_node(dev), "ti,sci-dev-id",
+				   &intr->ti_sci_id);
 	if (ret) {
-		dev_err(dev, "missing 'ti,sci-dst-id' property\n");
+		dev_err(dev, "missing 'ti,sci-dev-id' property\n");
 		return -EINVAL;
 	}
 
-	intr->dst_irq = devm_ti_sci_get_of_resource(intr->sci, dev,
-						    intr->dst_id,
-						    "ti,sci-rm-range-girq");
-	if (IS_ERR(intr->dst_irq)) {
+	intr->out_irqs = devm_ti_sci_get_resource(intr->sci, dev,
+						  intr->ti_sci_id,
+						  TI_SCI_RESASG_SUBTYPE_IR_OUTPUT);
+	if (IS_ERR(intr->out_irqs)) {
 		dev_err(dev, "Destination irq resource allocation failed\n");
-		return PTR_ERR(intr->dst_irq);
+		return PTR_ERR(intr->out_irqs);
 	}
 
 	domain = irq_domain_add_hierarchy(parent_domain, 0, 0, dev_of_node(dev),
@@ -252,6 +284,8 @@ static int ti_sci_intr_irq_domain_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 
+	dev_info(dev, "Interrupt Router %d domain created\n", intr->ti_sci_id);
+
 	return 0;
 }
 
-- 
GitLab


From 6dde29dc31aa265a79d9e6b3571987cfa4b179cc Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:20 +0530
Subject: [PATCH 0084/1341] dt-bindings: irqchip: ti, sci-inta: Update docs to
 support different parent.

Drop the firmware related interrupt ranges and use the hardware specified
interrupt numbers within Interrupt Aggregator. This ensures interrupt
aggregator DT node need not assume any interrupt parent type.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200806074826.24607-8-lokeshvutla@ti.com
---
 .../interrupt-controller/ti,sci-inta.txt       | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt
index 7841cb099e139..5fd3ee0f7167d 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt
+++ b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt
@@ -43,13 +43,14 @@ TISCI Interrupt Aggregator Node:
 - msi-controller:	Identifies the node as an MSI controller.
 - interrupt-parent:	phandle of irq parent.
 - ti,sci:		Phandle to TI-SCI compatible System controller node.
-- ti,sci-dev-id:	TISCI device ID of the Interrupt Aggregator.
-- ti,sci-rm-range-vint:	Array of TISCI subtype ids representing vints(inta
-			outputs) range within this INTA, assigned to the
-			requesting host context.
-- ti,sci-rm-range-global-event:	Array of TISCI subtype ids representing the
-			global events range reaching this IA and are assigned
-			to the requesting host context.
+- ti,sci-dev-id:	TISCI device id of interrupt controller.
+- ti,interrupt-ranges:	Set of triplets containing ranges that convert
+			the INTA output interrupt numbers to parent's
+			interrupt number. Each triplet has following entries:
+			- First entry specifies the base for vint
+			- Second entry specifies the base for parent irqs
+			- Third entry specifies the limit
+
 
 Example:
 --------
@@ -61,6 +62,5 @@ main_udmass_inta: interrupt-controller@33d00000 {
 	interrupt-parent = <&main_navss_intr>;
 	ti,sci = <&dmsc>;
 	ti,sci-dev-id = <179>;
-	ti,sci-rm-range-vint = <0x0>;
-	ti,sci-rm-range-global-event = <0x1>;
+	ti,interrupt-ranges = <0 0 256>;
 };
-- 
GitLab


From c4dff06e79d99691f18dfc8a61a1cb17c602a025 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:21 +0530
Subject: [PATCH 0085/1341] dt-bindings: irqchip: Convert ti, sci-inta bindings
 to yaml

In order to automate the verification of DT nodes convert
ti,sci-inta.txt ti,sci-inta.yaml.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200806074826.24607-9-lokeshvutla@ti.com
---
 .../interrupt-controller/ti,sci-inta.txt      | 66 -------------
 .../interrupt-controller/ti,sci-inta.yaml     | 98 +++++++++++++++++++
 MAINTAINERS                                   |  2 +-
 3 files changed, 99 insertions(+), 67 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.yaml

diff --git a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt
deleted file mode 100644
index 5fd3ee0f7167d..0000000000000
--- a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt
+++ /dev/null
@@ -1,66 +0,0 @@
-Texas Instruments K3 Interrupt Aggregator
-=========================================
-
-The Interrupt Aggregator (INTA) provides a centralized machine
-which handles the termination of system events to that they can
-be coherently processed by the host(s) in the system. A maximum
-of 64 events can be mapped to a single interrupt.
-
-
-                              Interrupt Aggregator
-                     +-----------------------------------------+
-                     |      Intmap            VINT             |
-                     | +--------------+  +------------+        |
-            m ------>| | vint  | bit  |  | 0 |.....|63| vint0  |
-               .     | +--------------+  +------------+        |       +------+
-               .     |         .               .               |       | HOST |
-Globalevents  ------>|         .               .               |------>| IRQ  |
-               .     |         .               .               |       | CTRL |
-               .     |         .               .               |       +------+
-            n ------>| +--------------+  +------------+        |
-                     | | vint  | bit  |  | 0 |.....|63| vintx  |
-                     | +--------------+  +------------+        |
-                     |                                         |
-                     +-----------------------------------------+
-
-Configuration of these Intmap registers that maps global events to vint is done
-by a system controller (like the Device Memory and Security Controller on K3
-AM654 SoC). Driver should request the system controller to get the range
-of global events and vints assigned to the requesting host. Management
-of these requested resources should be handled by driver and requests
-system controller to map specific global event to vint, bit pair.
-
-Communication between the host processor running an OS and the system
-controller happens through a protocol called TI System Control Interface
-(TISCI protocol). For more details refer:
-Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
-
-TISCI Interrupt Aggregator Node:
--------------------------------
-- compatible:		Must be "ti,sci-inta".
-- reg:			Should contain registers location and length.
-- interrupt-controller:	Identifies the node as an interrupt controller
-- msi-controller:	Identifies the node as an MSI controller.
-- interrupt-parent:	phandle of irq parent.
-- ti,sci:		Phandle to TI-SCI compatible System controller node.
-- ti,sci-dev-id:	TISCI device id of interrupt controller.
-- ti,interrupt-ranges:	Set of triplets containing ranges that convert
-			the INTA output interrupt numbers to parent's
-			interrupt number. Each triplet has following entries:
-			- First entry specifies the base for vint
-			- Second entry specifies the base for parent irqs
-			- Third entry specifies the limit
-
-
-Example:
---------
-main_udmass_inta: interrupt-controller@33d00000 {
-	compatible = "ti,sci-inta";
-	reg = <0x0 0x33d00000 0x0 0x100000>;
-	interrupt-controller;
-	msi-controller;
-	interrupt-parent = <&main_navss_intr>;
-	ti,sci = <&dmsc>;
-	ti,sci-dev-id = <179>;
-	ti,interrupt-ranges = <0 0 256>;
-};
diff --git a/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.yaml b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.yaml
new file mode 100644
index 0000000000000..c7cd05656a3e9
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.yaml
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/ti,sci-inta.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments K3 Interrupt Aggregator
+
+maintainers:
+  - Lokesh Vutla <lokeshvutla@ti.com>
+
+allOf:
+  - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
+
+description: |
+  The Interrupt Aggregator (INTA) provides a centralized machine
+  which handles the termination of system events to that they can
+  be coherently processed by the host(s) in the system. A maximum
+  of 64 events can be mapped to a single interrupt.
+
+                                Interrupt Aggregator
+                       +-----------------------------------------+
+                       |      Intmap            VINT             |
+                       | +--------------+  +------------+        |
+              m ------>| | vint  | bit  |  | 0 |.....|63| vint0  |
+                 .     | +--------------+  +------------+        |      +------+
+                 .     |         .               .               |      | HOST |
+  Globalevents  ------>|         .               .               |----->| IRQ  |
+                 .     |         .               .               |      | CTRL |
+                 .     |         .               .               |      +------+
+              n ------>| +--------------+  +------------+        |
+                       | | vint  | bit  |  | 0 |.....|63| vintx  |
+                       | +--------------+  +------------+        |
+                       |                                         |
+                       +-----------------------------------------+
+
+  Configuration of these Intmap registers that maps global events to vint is
+  done by a system controller (like the Device Memory and Security Controller
+  on AM654 SoC). Driver should request the system controller to get the range
+  of global events and vints assigned to the requesting host. Management
+  of these requested resources should be handled by driver and requests
+  system controller to map specific global event to vint, bit pair.
+
+  Communication between the host processor running an OS and the system
+  controller happens through a protocol called TI System Control Interface
+  (TISCI protocol).
+
+properties:
+  compatible:
+    const: ti,sci-inta
+
+  reg:
+    maxItems: 1
+
+  interrupt-controller: true
+
+  msi-controller: true
+
+  ti,interrupt-ranges:
+    $ref: /schemas/types.yaml#/definitions/uint32-matrix
+    description: |
+      Interrupt ranges that converts the INTA output hw irq numbers
+      to parents's input interrupt numbers.
+    items:
+      items:
+        - description: |
+            "output_irq" specifies the base for inta output irq
+        - description: |
+            "parent's input irq" specifies the base for parent irq
+        - description: |
+            "limit" specifies the limit for translation
+
+required:
+  - compatible
+  - reg
+  - interrupt-controller
+  - msi-controller
+  - ti,sci
+  - ti,sci-dev-id
+  - ti,interrupt-ranges
+
+examples:
+  - |
+    bus {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        main_udmass_inta: msi-controller@33d00000 {
+            compatible = "ti,sci-inta";
+            reg = <0x0 0x33d00000 0x0 0x100000>;
+            interrupt-controller;
+            msi-controller;
+            interrupt-parent = <&main_navss_intr>;
+            ti,sci = <&dmsc>;
+            ti,sci-dev-id = <179>;
+            ti,interrupt-ranges = <0 0 256>;
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index e08405c2c22e2..e3f1cdb69c842 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -17116,7 +17116,7 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/arm/keystone/ti,k3-sci-common.yaml
 F:	Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
 F:	Documentation/devicetree/bindings/clock/ti,sci-clk.txt
-F:	Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt
+F:	Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.yaml
 F:	Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.yaml
 F:	Documentation/devicetree/bindings/reset/ti,sci-reset.txt
 F:	Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
-- 
GitLab


From 7206f3149b8198c65a0ca8c01bfa1d8ace27bf91 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:22 +0530
Subject: [PATCH 0086/1341] irqchip/ti-sci-inta: Do not store TISCI device id
 in platform device id field

Even though DT doesn't make active use of id field in platform_device, we cannot
hijack it to store TISCI device id. So create a field in struct ti_sci_inta
for storing TISCI id and drop usage of id field in platform_device.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200806074826.24607-10-lokeshvutla@ti.com
---
 drivers/irqchip/irq-ti-sci-inta.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/irqchip/irq-ti-sci-inta.c b/drivers/irqchip/irq-ti-sci-inta.c
index b7cc5d6580d8f..fbfa1f4f521e0 100644
--- a/drivers/irqchip/irq-ti-sci-inta.c
+++ b/drivers/irqchip/irq-ti-sci-inta.c
@@ -83,6 +83,7 @@ struct ti_sci_inta_vint_desc {
  * @vint_mutex:		Mutex to protect vint_list
  * @base:		Base address of the memory mapped IO registers
  * @pdev:		Pointer to platform device.
+ * @ti_sci_id:		TI-SCI device identifier
  */
 struct ti_sci_inta_irq_domain {
 	const struct ti_sci_handle *sci;
@@ -93,6 +94,7 @@ struct ti_sci_inta_irq_domain {
 	struct mutex vint_mutex;
 	void __iomem *base;
 	struct platform_device *pdev;
+	u32 ti_sci_id;
 };
 
 #define to_vint_desc(e, i) container_of(e, struct ti_sci_inta_vint_desc, \
@@ -156,7 +158,7 @@ static struct ti_sci_inta_vint_desc *ti_sci_inta_alloc_parent_irq(struct irq_dom
 
 	parent_fwspec.fwnode = of_node_to_fwnode(of_irq_find_parent(dev_of_node(&inta->pdev->dev)));
 	parent_fwspec.param_count = 2;
-	parent_fwspec.param[0] = inta->pdev->id;
+	parent_fwspec.param[0] = inta->ti_sci_id;
 	parent_fwspec.param[1] = vint_desc->vint_id;
 
 	parent_virq = irq_create_fwspec_mapping(&parent_fwspec);
@@ -202,7 +204,7 @@ static struct ti_sci_inta_event_desc *ti_sci_inta_alloc_event(struct ti_sci_inta
 
 	err = inta->sci->ops.rm_irq_ops.set_event_map(inta->sci,
 						      dev_id, dev_index,
-						      inta->pdev->id,
+						      inta->ti_sci_id,
 						      vint_desc->vint_id,
 						      event_desc->global_event,
 						      free_bit);
@@ -299,7 +301,7 @@ static void ti_sci_inta_free_irq(struct ti_sci_inta_event_desc *event_desc,
 	inta->sci->ops.rm_irq_ops.free_event_map(inta->sci,
 						 HWIRQ_TO_DEVID(hwirq),
 						 HWIRQ_TO_IRQID(hwirq),
-						 inta->pdev->id,
+						 inta->ti_sci_id,
 						 vint_desc->vint_id,
 						 event_desc->global_event,
 						 event_desc->vint_bit);
@@ -547,21 +549,21 @@ static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	ret = of_property_read_u32(dev->of_node, "ti,sci-dev-id", &pdev->id);
+	ret = of_property_read_u32(dev->of_node, "ti,sci-dev-id", &inta->ti_sci_id);
 	if (ret) {
 		dev_err(dev, "missing 'ti,sci-dev-id' property\n");
 		return -EINVAL;
 	}
 
-	inta->vint = devm_ti_sci_get_of_resource(inta->sci, dev, pdev->id,
+	inta->vint = devm_ti_sci_get_of_resource(inta->sci, dev, inta->ti_sci_id,
 						 "ti,sci-rm-range-vint");
 	if (IS_ERR(inta->vint)) {
 		dev_err(dev, "VINT resource allocation failed\n");
 		return PTR_ERR(inta->vint);
 	}
 
-	inta->global_event = devm_ti_sci_get_of_resource(inta->sci, dev, pdev->id,
-						"ti,sci-rm-range-global-event");
+	inta->global_event = devm_ti_sci_get_of_resource(inta->sci, dev, inta->ti_sci_id,
+							 "ti,sci-rm-range-global-event");
 	if (IS_ERR(inta->global_event)) {
 		dev_err(dev, "Global event resource allocation failed\n");
 		return PTR_ERR(inta->global_event);
-- 
GitLab


From 5c4b585d29102c7e6a6217112bbf1be774795cd7 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:23 +0530
Subject: [PATCH 0087/1341] irqchip/ti-sci-inta: Add support for INTA directly
 connecting to GIC

Driver assumes that Interrupt parent to Interrupt Aggregator is always
Interrupt router. This is not true always and GIC can be a parent to
Interrupt Aggregator. Update the driver to detect the parent and request
the parent irqs accordingly.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200806074826.24607-11-lokeshvutla@ti.com
---
 drivers/irqchip/irq-ti-sci-inta.c | 87 ++++++++++++++++++++++++++-----
 1 file changed, 74 insertions(+), 13 deletions(-)

diff --git a/drivers/irqchip/irq-ti-sci-inta.c b/drivers/irqchip/irq-ti-sci-inta.c
index fbfa1f4f521e0..d4e97605456bb 100644
--- a/drivers/irqchip/irq-ti-sci-inta.c
+++ b/drivers/irqchip/irq-ti-sci-inta.c
@@ -8,6 +8,7 @@
 
 #include <linux/err.h>
 #include <linux/io.h>
+#include <linux/irq.h>
 #include <linux/irqchip.h>
 #include <linux/irqdomain.h>
 #include <linux/interrupt.h>
@@ -130,6 +131,37 @@ static void ti_sci_inta_irq_handler(struct irq_desc *desc)
 	chained_irq_exit(irq_desc_get_chip(desc), desc);
 }
 
+/**
+ * ti_sci_inta_xlate_irq() - Translate hwirq to parent's hwirq.
+ * @inta:	IRQ domain corresponding to Interrupt Aggregator
+ * @irq:	Hardware irq corresponding to the above irq domain
+ *
+ * Return parent irq number if translation is available else -ENOENT.
+ */
+static int ti_sci_inta_xlate_irq(struct ti_sci_inta_irq_domain *inta,
+				 u16 vint_id)
+{
+	struct device_node *np = dev_of_node(&inta->pdev->dev);
+	u32 base, parent_base, size;
+	const __be32 *range;
+	int len;
+
+	range = of_get_property(np, "ti,interrupt-ranges", &len);
+	if (!range)
+		return vint_id;
+
+	for (len /= sizeof(*range); len >= 3; len -= 3) {
+		base = be32_to_cpu(*range++);
+		parent_base = be32_to_cpu(*range++);
+		size = be32_to_cpu(*range++);
+
+		if (base <= vint_id && vint_id < base + size)
+			return vint_id - base + parent_base;
+	}
+
+	return -ENOENT;
+}
+
 /**
  * ti_sci_inta_alloc_parent_irq() - Allocate parent irq to Interrupt aggregator
  * @domain:	IRQ domain corresponding to Interrupt Aggregator
@@ -141,30 +173,52 @@ static struct ti_sci_inta_vint_desc *ti_sci_inta_alloc_parent_irq(struct irq_dom
 	struct ti_sci_inta_irq_domain *inta = domain->host_data;
 	struct ti_sci_inta_vint_desc *vint_desc;
 	struct irq_fwspec parent_fwspec;
+	struct device_node *parent_node;
 	unsigned int parent_virq;
-	u16 vint_id;
+	u16 vint_id, p_hwirq;
+	int ret;
 
 	vint_id = ti_sci_get_free_resource(inta->vint);
 	if (vint_id == TI_SCI_RESOURCE_NULL)
 		return ERR_PTR(-EINVAL);
 
+	p_hwirq = ti_sci_inta_xlate_irq(inta, vint_id);
+	if (p_hwirq < 0) {
+		ret = p_hwirq;
+		goto free_vint;
+	}
+
 	vint_desc = kzalloc(sizeof(*vint_desc), GFP_KERNEL);
-	if (!vint_desc)
-		return ERR_PTR(-ENOMEM);
+	if (!vint_desc) {
+		ret = -ENOMEM;
+		goto free_vint;
+	}
 
 	vint_desc->domain = domain;
 	vint_desc->vint_id = vint_id;
 	INIT_LIST_HEAD(&vint_desc->list);
 
-	parent_fwspec.fwnode = of_node_to_fwnode(of_irq_find_parent(dev_of_node(&inta->pdev->dev)));
-	parent_fwspec.param_count = 2;
-	parent_fwspec.param[0] = inta->ti_sci_id;
-	parent_fwspec.param[1] = vint_desc->vint_id;
+	parent_node = of_irq_find_parent(dev_of_node(&inta->pdev->dev));
+	parent_fwspec.fwnode = of_node_to_fwnode(parent_node);
+
+	if (of_device_is_compatible(parent_node, "arm,gic-v3")) {
+		/* Parent is GIC */
+		parent_fwspec.param_count = 3;
+		parent_fwspec.param[0] = 0;
+		parent_fwspec.param[1] = p_hwirq - 32;
+		parent_fwspec.param[2] = IRQ_TYPE_LEVEL_HIGH;
+	} else {
+		/* Parent is Interrupt Router */
+		parent_fwspec.param_count = 1;
+		parent_fwspec.param[0] = p_hwirq;
+	}
 
 	parent_virq = irq_create_fwspec_mapping(&parent_fwspec);
 	if (parent_virq == 0) {
-		kfree(vint_desc);
-		return ERR_PTR(-EINVAL);
+		dev_err(&inta->pdev->dev, "Parent IRQ allocation failed\n");
+		ret = -EINVAL;
+		goto free_vint_desc;
+
 	}
 	vint_desc->parent_virq = parent_virq;
 
@@ -173,6 +227,11 @@ static struct ti_sci_inta_vint_desc *ti_sci_inta_alloc_parent_irq(struct irq_dom
 					 ti_sci_inta_irq_handler, vint_desc);
 
 	return vint_desc;
+free_vint_desc:
+	kfree(vint_desc);
+free_vint:
+	ti_sci_release_resource(inta->vint, vint_id);
+	return ERR_PTR(ret);
 }
 
 /**
@@ -555,15 +614,15 @@ static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	inta->vint = devm_ti_sci_get_of_resource(inta->sci, dev, inta->ti_sci_id,
-						 "ti,sci-rm-range-vint");
+	inta->vint = devm_ti_sci_get_resource(inta->sci, dev, inta->ti_sci_id,
+					      TI_SCI_RESASG_SUBTYPE_IA_VINT);
 	if (IS_ERR(inta->vint)) {
 		dev_err(dev, "VINT resource allocation failed\n");
 		return PTR_ERR(inta->vint);
 	}
 
-	inta->global_event = devm_ti_sci_get_of_resource(inta->sci, dev, inta->ti_sci_id,
-							 "ti,sci-rm-range-global-event");
+	inta->global_event = devm_ti_sci_get_resource(inta->sci, dev, inta->ti_sci_id,
+						      TI_SCI_RESASG_SUBTYPE_GLOBAL_EVENT_SEVT);
 	if (IS_ERR(inta->global_event)) {
 		dev_err(dev, "Global event resource allocation failed\n");
 		return PTR_ERR(inta->global_event);
@@ -594,6 +653,8 @@ static int ti_sci_inta_irq_domain_probe(struct platform_device *pdev)
 	INIT_LIST_HEAD(&inta->vint_list);
 	mutex_init(&inta->vint_mutex);
 
+	dev_info(dev, "Interrupt Aggregator domain %d created\n", pdev->id);
+
 	return 0;
 }
 
-- 
GitLab


From 8d523f096da53598c271b5b69fcacb48779884a3 Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:24 +0530
Subject: [PATCH 0088/1341] arm64: dts: k3-j721e: ti-sci-inta/intr: Update to
 latest bindings

Update the INTA and INTR dt nodes to the latest DT bindings.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20200806074826.24607-12-lokeshvutla@ti.com
---
 .../dts/ti/k3-j721e-common-proc-board.dts     | 10 ++---
 arch/arm64/boot/dts/ti/k3-j721e-main.dtsi     | 43 ++++++++++---------
 .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi      | 11 +++--
 3 files changed, 32 insertions(+), 32 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
index 8bc1e6ecc50eb..e8fc01d97adad 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-common-proc-board.dts
@@ -287,7 +287,7 @@ &wkup_gpio1 {
 };
 
 &mailbox0_cluster0 {
-	interrupts = <214 0>;
+	interrupts = <436>;
 
 	mbox_mcu_r5fss0_core0: mbox-mcu-r5fss0-core0 {
 		ti,mbox-rx = <0 0 0>;
@@ -301,7 +301,7 @@ mbox_mcu_r5fss0_core1: mbox-mcu-r5fss0-core1 {
 };
 
 &mailbox0_cluster1 {
-	interrupts = <215 0>;
+	interrupts = <432>;
 
 	mbox_main_r5fss0_core0: mbox-main-r5fss0-core0 {
 		ti,mbox-rx = <0 0 0>;
@@ -315,7 +315,7 @@ mbox_main_r5fss0_core1: mbox-main-r5fss0-core1 {
 };
 
 &mailbox0_cluster2 {
-	interrupts = <216 0>;
+	interrupts = <428>;
 
 	mbox_main_r5fss1_core0: mbox-main-r5fss1-core0 {
 		ti,mbox-rx = <0 0 0>;
@@ -329,7 +329,7 @@ mbox_main_r5fss1_core1: mbox-main-r5fss1-core1 {
 };
 
 &mailbox0_cluster3 {
-	interrupts = <217 0>;
+	interrupts = <424>;
 
 	mbox_c66_0: mbox-c66-0 {
 		ti,mbox-rx = <0 0 0>;
@@ -343,7 +343,7 @@ mbox_c66_1: mbox-c66-1 {
 };
 
 &mailbox0_cluster4 {
-	interrupts = <218 0>;
+	interrupts = <420>;
 
 	mbox_c71_0: mbox-c71-0 {
 		ti,mbox-rx = <0 0 0>;
diff --git a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
index d14060207f009..12ceea9b3c9ae 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e-main.dtsi
@@ -80,10 +80,10 @@ main_gpio_intr: interrupt-controller0 {
 		ti,intr-trigger-type = <1>;
 		interrupt-controller;
 		interrupt-parent = <&gic500>;
-		#interrupt-cells = <2>;
+		#interrupt-cells = <1>;
 		ti,sci = <&dmsc>;
-		ti,sci-dst-id = <14>;
-		ti,sci-rm-range-girq = <0x1>;
+		ti,sci-dev-id = <131>;
+		ti,interrupt-ranges = <8 392 56>;
 	};
 
 	main_navss {
@@ -101,10 +101,12 @@ main_navss_intr: interrupt-controller1 {
 			ti,intr-trigger-type = <4>;
 			interrupt-controller;
 			interrupt-parent = <&gic500>;
-			#interrupt-cells = <2>;
+			#interrupt-cells = <1>;
 			ti,sci = <&dmsc>;
-			ti,sci-dst-id = <14>;
-			ti,sci-rm-range-girq = <0>, <2>;
+			ti,sci-dev-id = <213>;
+			ti,interrupt-ranges = <0 64 64>,
+					      <64 448 64>,
+					      <128 672 64>;
 		};
 
 		main_udmass_inta: interrupt-controller@33d00000 {
@@ -115,8 +117,7 @@ main_udmass_inta: interrupt-controller@33d00000 {
 			msi-controller;
 			ti,sci = <&dmsc>;
 			ti,sci-dev-id = <209>;
-			ti,sci-rm-range-vint = <0xa>;
-			ti,sci-rm-range-global-event = <0xd>;
+			ti,interrupt-ranges = <0 0 256>;
 		};
 
 		secure_proxy_main: mailbox@32c00000 {
@@ -296,7 +297,7 @@ cpts@310d0000 {
 			reg-names = "cpts";
 			clocks = <&k3_clks 201 1>;
 			clock-names = "cpts";
-			interrupts-extended = <&main_navss_intr 201 0>;
+			interrupts-extended = <&main_navss_intr 391>;
 			interrupt-names = "cpts";
 			ti,cpts-periodic-outputs = <6>;
 			ti,cpts-ext-ts-inputs = <8>;
@@ -688,8 +689,8 @@ main_gpio0: gpio@600000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&main_gpio_intr>;
-		interrupts = <105 0>, <105 1>, <105 2>, <105 3>,
-			     <105 4>, <105 5>, <105 6>, <105 7>;
+		interrupts = <256>, <257>, <258>, <259>,
+			     <260>, <261>, <262>, <263>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <128>;
@@ -705,7 +706,7 @@ main_gpio1: gpio@601000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&main_gpio_intr>;
-		interrupts = <106 0>, <106 1>, <106 2>;
+		interrupts = <288>, <289>, <290>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <36>;
@@ -721,8 +722,8 @@ main_gpio2: gpio@610000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&main_gpio_intr>;
-		interrupts = <107 0>, <107 1>, <107 2>, <107 3>,
-			     <107 4>, <107 5>, <107 6>, <107 7>;
+		interrupts = <264>, <265>, <266>, <267>,
+			     <268>, <269>, <270>, <271>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <128>;
@@ -738,7 +739,7 @@ main_gpio3: gpio@611000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&main_gpio_intr>;
-		interrupts = <108 0>, <108 1>, <108 2>;
+		interrupts = <292>, <293>, <294>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <36>;
@@ -754,8 +755,8 @@ main_gpio4: gpio@620000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&main_gpio_intr>;
-		interrupts = <109 0>, <109 1>, <109 2>, <109 3>,
-			     <109 4>, <109 5>, <109 6>, <109 7>;
+		interrupts = <272>, <273>, <274>, <275>,
+			     <276>, <277>, <278>, <279>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <128>;
@@ -771,7 +772,7 @@ main_gpio5: gpio@621000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&main_gpio_intr>;
-		interrupts = <110 0>, <110 1>, <110 2>;
+		interrupts = <296>, <297>, <298>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <36>;
@@ -787,8 +788,8 @@ main_gpio6: gpio@630000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&main_gpio_intr>;
-		interrupts = <111 0>, <111 1>, <111 2>, <111 3>,
-			     <111 4>, <111 5>, <111 6>, <111 7>;
+		interrupts = <280>, <281>, <282>, <283>,
+			     <284>, <285>, <286>, <287>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <128>;
@@ -804,7 +805,7 @@ main_gpio7: gpio@631000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&main_gpio_intr>;
-		interrupts = <112 0>, <112 1>, <112 2>;
+		interrupts = <300>, <301>, <302>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <36>;
diff --git a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
index 30a735bcd0c89..e00cf2a08e6dc 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
@@ -101,9 +101,10 @@ wkup_gpio_intr: interrupt-controller2 {
 		ti,intr-trigger-type = <1>;
 		interrupt-controller;
 		interrupt-parent = <&gic500>;
-		#interrupt-cells = <2>;
+		#interrupt-cells = <1>;
 		ti,sci = <&dmsc>;
-		ti,sci-dst-id = <14>;
+		ti,sci-dev-id = <137>;
+		ti,interrupt-ranges = <16 960 16>;
 		ti,sci-rm-range-girq = <0x5>;
 	};
 
@@ -113,8 +114,7 @@ wkup_gpio0: gpio@42110000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&wkup_gpio_intr>;
-		interrupts = <113 0>, <113 1>, <113 2>,
-			     <113 3>, <113 4>, <113 5>;
+		interrupts = <103>, <104>, <105>, <106>, <107>, <108>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <84>;
@@ -130,8 +130,7 @@ wkup_gpio1: gpio@42100000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&wkup_gpio_intr>;
-		interrupts = <114 0>, <114 1>, <114 2>,
-			     <114 3>, <114 4>, <114 5>;
+		interrupts = <112>, <113>, <114>, <115>, <116>, <117>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <84>;
-- 
GitLab


From fef845122f6c3c92178e4e4a1f85cce84dca06fe Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:25 +0530
Subject: [PATCH 0089/1341] arm64: dts: k3-am65: ti-sci-inta/intr: Update to
 latest bindings

Update the INTA and INTR dt nodes to the latest DT bindings.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20200806074826.24607-13-lokeshvutla@ti.com
---
 arch/arm64/boot/dts/ti/k3-am65-main.dtsi      | 24 +++++++++----------
 arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi    |  8 +++----
 .../arm64/boot/dts/ti/k3-am654-base-board.dts |  4 ++--
 .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi      |  1 -
 4 files changed, 17 insertions(+), 20 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
index 9edfae5944f72..996a82ff983e8 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
@@ -417,10 +417,10 @@ intr_main_gpio: interrupt-controller0 {
 		ti,intr-trigger-type = <1>;
 		interrupt-controller;
 		interrupt-parent = <&gic500>;
-		#interrupt-cells = <2>;
+		#interrupt-cells = <1>;
 		ti,sci = <&dmsc>;
-		ti,sci-dst-id = <56>;
-		ti,sci-rm-range-girq = <0x1>;
+		ti,sci-dev-id = <100>;
+		ti,interrupt-ranges = <0 392 32>;
 	};
 
 	main_navss {
@@ -438,10 +438,11 @@ intr_main_navss: interrupt-controller1 {
 			ti,intr-trigger-type = <4>;
 			interrupt-controller;
 			interrupt-parent = <&gic500>;
-			#interrupt-cells = <2>;
+			#interrupt-cells = <1>;
 			ti,sci = <&dmsc>;
-			ti,sci-dst-id = <56>;
-			ti,sci-rm-range-girq = <0x0>, <0x2>;
+			ti,sci-dev-id = <182>;
+			ti,interrupt-ranges = <0 64 64>,
+					      <64 448 64>;
 		};
 
 		inta_main_udmass: interrupt-controller@33d00000 {
@@ -452,8 +453,7 @@ inta_main_udmass: interrupt-controller@33d00000 {
 			msi-controller;
 			ti,sci = <&dmsc>;
 			ti,sci-dev-id = <179>;
-			ti,sci-rm-range-vint = <0x0>;
-			ti,sci-rm-range-global-event = <0x1>;
+			ti,interrupt-ranges = <0 0 256>;
 		};
 
 		secure_proxy_main: mailbox@32c00000 {
@@ -622,7 +622,7 @@ cpts@310d0000 {
 			reg-names = "cpts";
 			clocks = <&main_cpts_mux>;
 			clock-names = "cpts";
-			interrupts-extended = <&intr_main_navss 163 0>;
+			interrupts-extended = <&intr_main_navss 391>;
 			interrupt-names = "cpts";
 			ti,cpts-periodic-outputs = <6>;
 			ti,cpts-ext-ts-inputs = <8>;
@@ -645,8 +645,7 @@ main_gpio0:  main_gpio0@600000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&intr_main_gpio>;
-		interrupts = <57 256>, <57 257>, <57 258>, <57 259>, <57 260>,
-				<57 261>;
+		interrupts = <192>, <193>, <194>, <195>, <196>, <197>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <96>;
@@ -661,8 +660,7 @@ main_gpio1:  main_gpio1@601000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&intr_main_gpio>;
-		interrupts = <58 256>, <58 257>, <58 258>, <58 259>, <58 260>,
-				<58 261>;
+		interrupts = <200>, <201>, <202>, <203>, <204>, <205>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <90>;
diff --git a/arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi
index 5f55b9e82cf1e..a1ffe88d96641 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi
@@ -74,10 +74,10 @@ intr_wkup_gpio: interrupt-controller2 {
 		ti,intr-trigger-type = <1>;
 		interrupt-controller;
 		interrupt-parent = <&gic500>;
-		#interrupt-cells = <2>;
+		#interrupt-cells = <1>;
 		ti,sci = <&dmsc>;
-		ti,sci-dst-id = <56>;
-		ti,sci-rm-range-girq = <0x4>;
+		ti,sci-dev-id = <156>;
+		ti,interrupt-ranges = <0 712 16>;
 	};
 
 	wkup_gpio0: wkup_gpio0@42110000 {
@@ -86,7 +86,7 @@ wkup_gpio0: wkup_gpio0@42110000 {
 		gpio-controller;
 		#gpio-cells = <2>;
 		interrupt-parent = <&intr_wkup_gpio>;
-		interrupts = <59 128>, <59 129>, <59 130>, <59 131>;
+		interrupts = <60>, <61>, <62>, <63>;
 		interrupt-controller;
 		#interrupt-cells = <2>;
 		ti,ngpio = <56>;
diff --git a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
index 611e662070107..b8a8a0fcb8af1 100644
--- a/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-am654-base-board.dts
@@ -384,7 +384,7 @@ &pcie1_ep {
 };
 
 &mailbox0_cluster0 {
-	interrupts = <164 0>;
+	interrupts = <436>;
 
 	mbox_mcu_r5fss0_core0: mbox-mcu-r5fss0-core0 {
 		ti,mbox-tx = <1 0 0>;
@@ -393,7 +393,7 @@ mbox_mcu_r5fss0_core0: mbox-mcu-r5fss0-core0 {
 };
 
 &mailbox0_cluster1 {
-	interrupts = <165 0>;
+	interrupts = <432>;
 
 	mbox_mcu_r5fss0_core1: mbox-mcu-r5fss0-core1 {
 		ti,mbox-tx = <1 0 0>;
diff --git a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
index e00cf2a08e6dc..c4a48e8d420a2 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
@@ -105,7 +105,6 @@ wkup_gpio_intr: interrupt-controller2 {
 		ti,sci = <&dmsc>;
 		ti,sci-dev-id = <137>;
 		ti,interrupt-ranges = <16 960 16>;
-		ti,sci-rm-range-girq = <0x5>;
 	};
 
 	wkup_gpio0: gpio@42110000 {
-- 
GitLab


From 6da45875fa174d9db238ea0d6846061e68b41b6d Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Thu, 6 Aug 2020 13:18:26 +0530
Subject: [PATCH 0090/1341] arm64: dts: k3-am65: Update the RM resource types

Update the ringacc and udma dt nodes to use the latest RM resource types
similar to the ones used in k3-j721e dt nodes.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Nishanth Menon <nm@ti.com>
Link: https://lore.kernel.org/r/20200806074826.24607-14-lokeshvutla@ti.com
---
 arch/arm64/boot/dts/ti/k3-am65-main.dtsi | 12 ++++++------
 arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi  | 12 ++++++------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
index 996a82ff983e8..24ef18fe77df0 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-main.dtsi
@@ -589,7 +589,7 @@ ringacc: ringacc@3c000000 {
 				<0x0 0x33000000 0x0 0x40000>;
 			reg-names = "rt", "fifos", "proxy_gcfg", "proxy_target";
 			ti,num-rings = <818>;
-			ti,sci-rm-range-gp-rings = <0x2>; /* GP ring range */
+			ti,sci-rm-range-gp-rings = <0x1>; /* GP ring range */
 			ti,dma-ring-reset-quirk;
 			ti,sci = <&dmsc>;
 			ti,sci-dev-id = <187>;
@@ -609,11 +609,11 @@ main_udmap: dma-controller@31150000 {
 			ti,sci-dev-id = <188>;
 			ti,ringacc = <&ringacc>;
 
-			ti,sci-rm-range-tchan = <0x1>, /* TX_HCHAN */
-						<0x2>; /* TX_CHAN */
-			ti,sci-rm-range-rchan = <0x4>, /* RX_HCHAN */
-						<0x5>; /* RX_CHAN */
-			ti,sci-rm-range-rflow = <0x6>; /* GP RFLOW */
+			ti,sci-rm-range-tchan = <0xf>, /* TX_HCHAN */
+						<0xd>; /* TX_CHAN */
+			ti,sci-rm-range-rchan = <0xb>, /* RX_HCHAN */
+						<0xa>; /* RX_CHAN */
+			ti,sci-rm-range-rflow = <0x0>; /* GP RFLOW */
 		};
 
 		cpts@310d0000 {
diff --git a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
index 8c1abcfe08605..51ca4b4d4c214 100644
--- a/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am65-mcu.dtsi
@@ -134,7 +134,7 @@ mcu_ringacc: ringacc@2b800000 {
 				<0x0 0x2a500000 0x0 0x40000>;
 			reg-names = "rt", "fifos", "proxy_gcfg", "proxy_target";
 			ti,num-rings = <286>;
-			ti,sci-rm-range-gp-rings = <0x2>; /* GP ring range */
+			ti,sci-rm-range-gp-rings = <0x1>; /* GP ring range */
 			ti,dma-ring-reset-quirk;
 			ti,sci = <&dmsc>;
 			ti,sci-dev-id = <195>;
@@ -154,11 +154,11 @@ mcu_udmap: dma-controller@285c0000 {
 			ti,sci-dev-id = <194>;
 			ti,ringacc = <&mcu_ringacc>;
 
-			ti,sci-rm-range-tchan = <0x1>, /* TX_HCHAN */
-						<0x2>; /* TX_CHAN */
-			ti,sci-rm-range-rchan = <0x3>, /* RX_HCHAN */
-						<0x4>; /* RX_CHAN */
-			ti,sci-rm-range-rflow = <0x5>; /* GP RFLOW */
+			ti,sci-rm-range-tchan = <0xf>, /* TX_HCHAN */
+						<0xd>; /* TX_CHAN */
+			ti,sci-rm-range-rchan = <0xb>, /* RX_HCHAN */
+						<0xa>; /* RX_CHAN */
+			ti,sci-rm-range-rflow = <0x0>; /* GP RFLOW */
 		};
 	};
 
-- 
GitLab


From b711d4eaf0c408a811311ee3e94d6e9e5a230a9a Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Sun, 16 Aug 2020 08:23:05 -0700
Subject: [PATCH 0091/1341] io_uring: find and cancel head link async work on
 files exit

Commit f254ac04c874 ("io_uring: enable lookup of links holding inflight files")
only handled 2 out of the three head link cases we have, we also need to
lookup and cancel work that is blocked in io-wq if that work has a link
that's holding a reference to the files structure.

Put the "cancel head links that hold this request pending" logic into
io_attempt_cancel(), which will to through the motions of finding and
canceling head links that hold the current inflight files stable request
pending.

Cc: stable@vger.kernel.org
Reported-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index dc506b75659c5..346a3eb847851 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8063,6 +8063,33 @@ static bool io_timeout_remove_link(struct io_ring_ctx *ctx,
 	return found;
 }
 
+static bool io_cancel_link_cb(struct io_wq_work *work, void *data)
+{
+	return io_match_link(container_of(work, struct io_kiocb, work), data);
+}
+
+static void io_attempt_cancel(struct io_ring_ctx *ctx, struct io_kiocb *req)
+{
+	enum io_wq_cancel cret;
+
+	/* cancel this particular work, if it's running */
+	cret = io_wq_cancel_work(ctx->io_wq, &req->work);
+	if (cret != IO_WQ_CANCEL_NOTFOUND)
+		return;
+
+	/* find links that hold this pending, cancel those */
+	cret = io_wq_cancel_cb(ctx->io_wq, io_cancel_link_cb, req, true);
+	if (cret != IO_WQ_CANCEL_NOTFOUND)
+		return;
+
+	/* if we have a poll link holding this pending, cancel that */
+	if (io_poll_remove_link(ctx, req))
+		return;
+
+	/* final option, timeout link is holding this req pending */
+	io_timeout_remove_link(ctx, req);
+}
+
 static void io_uring_cancel_files(struct io_ring_ctx *ctx,
 				  struct files_struct *files)
 {
@@ -8116,10 +8143,8 @@ static void io_uring_cancel_files(struct io_ring_ctx *ctx,
 				continue;
 			}
 		} else {
-			io_wq_cancel_work(ctx->io_wq, &cancel_req->work);
-			/* could be a link, check and remove if it is */
-			if (!io_poll_remove_link(ctx, cancel_req))
-				io_timeout_remove_link(ctx, cancel_req);
+			/* cancel this request, or head link requests */
+			io_attempt_cancel(ctx, cancel_req);
 			io_put_req(cancel_req);
 		}
 
-- 
GitLab


From 3b2a4439e0ae1732f90877a7160bbf42e1beb4b6 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Sun, 16 Aug 2020 10:58:43 -0700
Subject: [PATCH 0092/1341] io_uring: get rid of kiocb_wait_page_queue_init()

The 5.9 merge moved this function io_uring, which means that we don't
need to retain the generic nature of it. Clean up this part by removing
redundant checks, and just inlining the small remainder in
io_rw_should_retry().

No functional changes in this patch.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 41 +++++++++++------------------------------
 1 file changed, 11 insertions(+), 30 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 346a3eb847851..4b102d9ad846f 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3074,27 +3074,6 @@ static int io_async_buf_func(struct wait_queue_entry *wait, unsigned mode,
 	return 1;
 }
 
-static inline int kiocb_wait_page_queue_init(struct kiocb *kiocb,
-					     struct wait_page_queue *wait,
-					     wait_queue_func_t func,
-					     void *data)
-{
-	/* Can't support async wakeup with polled IO */
-	if (kiocb->ki_flags & IOCB_HIPRI)
-		return -EINVAL;
-	if (kiocb->ki_filp->f_mode & FMODE_BUF_RASYNC) {
-		wait->wait.func = func;
-		wait->wait.private = data;
-		wait->wait.flags = 0;
-		INIT_LIST_HEAD(&wait->wait.entry);
-		kiocb->ki_flags |= IOCB_WAITQ;
-		kiocb->ki_waitq = wait;
-		return 0;
-	}
-
-	return -EOPNOTSUPP;
-}
-
 /*
  * This controls whether a given IO request should be armed for async page
  * based retry. If we return false here, the request is handed to the async
@@ -3109,16 +3088,17 @@ static inline int kiocb_wait_page_queue_init(struct kiocb *kiocb,
  */
 static bool io_rw_should_retry(struct io_kiocb *req)
 {
+	struct wait_page_queue *wait = &req->io->rw.wpq;
 	struct kiocb *kiocb = &req->rw.kiocb;
-	int ret;
 
 	/* never retry for NOWAIT, we just complete with -EAGAIN */
 	if (req->flags & REQ_F_NOWAIT)
 		return false;
 
 	/* Only for buffered IO */
-	if (kiocb->ki_flags & IOCB_DIRECT)
+	if (kiocb->ki_flags & (IOCB_DIRECT | IOCB_HIPRI))
 		return false;
+
 	/*
 	 * just use poll if we can, and don't attempt if the fs doesn't
 	 * support callback based unlocks
@@ -3126,14 +3106,15 @@ static bool io_rw_should_retry(struct io_kiocb *req)
 	if (file_can_poll(req->file) || !(req->file->f_mode & FMODE_BUF_RASYNC))
 		return false;
 
-	ret = kiocb_wait_page_queue_init(kiocb, &req->io->rw.wpq,
-						io_async_buf_func, req);
-	if (!ret) {
-		io_get_req_task(req);
-		return true;
-	}
+	wait->wait.func = io_async_buf_func;
+	wait->wait.private = req;
+	wait->wait.flags = 0;
+	INIT_LIST_HEAD(&wait->wait.entry);
+	kiocb->ki_flags |= IOCB_WAITQ;
+	kiocb->ki_waitq = wait;
 
-	return false;
+	io_get_req_task(req);
+	return true;
 }
 
 static int io_iter_do_read(struct io_kiocb *req, struct iov_iter *iter)
-- 
GitLab


From 51fb91ed5a6fa855a74731610cd5435d83d6e17f Mon Sep 17 00:00:00 2001
From: Grant Peltier <grantpeltier93@gmail.com>
Date: Mon, 10 Aug 2020 13:36:27 -0500
Subject: [PATCH 0093/1341] hwmon: (pmbus/isl68137) remove READ_TEMPERATURE_1
 telemetry for RAA228228

Per the RAA228228 datasheet, READ_TEMPERATURE_1 is not a supported PMBus
command.

Signed-off-by: Grant Peltier <grantpeltier93@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/hwmon/pmbus/isl68137.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/hwmon/pmbus/isl68137.c b/drivers/hwmon/pmbus/isl68137.c
index 0c622711ef7e0..58aa95a3c010c 100644
--- a/drivers/hwmon/pmbus/isl68137.c
+++ b/drivers/hwmon/pmbus/isl68137.c
@@ -67,6 +67,7 @@ enum variants {
 	raa_dmpvr1_2rail,
 	raa_dmpvr2_1rail,
 	raa_dmpvr2_2rail,
+	raa_dmpvr2_2rail_nontc,
 	raa_dmpvr2_3rail,
 	raa_dmpvr2_hv,
 };
@@ -241,6 +242,10 @@ static int isl68137_probe(struct i2c_client *client,
 		info->pages = 1;
 		info->read_word_data = raa_dmpvr2_read_word_data;
 		break;
+	case raa_dmpvr2_2rail_nontc:
+		info->func[0] &= ~PMBUS_HAVE_TEMP;
+		info->func[1] &= ~PMBUS_HAVE_TEMP;
+		fallthrough;
 	case raa_dmpvr2_2rail:
 		info->pages = 2;
 		info->read_word_data = raa_dmpvr2_read_word_data;
@@ -304,7 +309,7 @@ static const struct i2c_device_id raa_dmpvr_id[] = {
 	{"raa228000", raa_dmpvr2_hv},
 	{"raa228004", raa_dmpvr2_hv},
 	{"raa228006", raa_dmpvr2_hv},
-	{"raa228228", raa_dmpvr2_2rail},
+	{"raa228228", raa_dmpvr2_2rail_nontc},
 	{"raa229001", raa_dmpvr2_2rail},
 	{"raa229004", raa_dmpvr2_2rail},
 	{}
-- 
GitLab


From 26bfeb26624071a47acb3a07097efe12044865f2 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Sun, 16 Aug 2020 16:39:34 -0700
Subject: [PATCH 0094/1341] block: blk-mq.c: fix @at_head kernel-doc warning
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix a kernel-doc warning in block/blk-mq.c:

../block/blk-mq.c:1844: warning: Function parameter or member 'at_head' not described in 'blk_mq_request_bypass_insert'

Fixes: 01e99aeca397 ("blk-mq: insert passthrough request into hctx->dispatch directly")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: André Almeida <andrealmeid@collabora.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Ming Lei <ming.lei@redhat.com>
Cc: linux-block@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-mq.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 0015a1892153a..35f8d06924421 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1834,6 +1834,7 @@ void __blk_mq_insert_request(struct blk_mq_hw_ctx *hctx, struct request *rq,
 /**
  * blk_mq_request_bypass_insert - Insert a request at dispatch list.
  * @rq: Pointer to request to be inserted.
+ * @at_head: true if the request should be inserted at the head of the list.
  * @run_queue: If we should run the hardware queue after inserting the request.
  *
  * Should only be used carefully, when the caller knows we want to
-- 
GitLab


From 03ef5941a04c68b5eb8254493d09b6e899a377a3 Mon Sep 17 00:00:00 2001
From: Xu Wang <vulab@iscas.ac.cn>
Date: Mon, 17 Aug 2020 02:16:49 +0000
Subject: [PATCH 0095/1341] bsg-lib: convert comma to semicolon

Replace a comma between expression statements by a semicolon.

Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/bsg-lib.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/bsg-lib.c b/block/bsg-lib.c
index fb7b347f80105..d185396d88bbc 100644
--- a/block/bsg-lib.c
+++ b/block/bsg-lib.c
@@ -378,7 +378,7 @@ struct request_queue *bsg_setup_queue(struct device *dev, const char *name,
 	bset->timeout_fn = timeout;
 
 	set = &bset->tag_set;
-	set->ops = &bsg_mq_ops,
+	set->ops = &bsg_mq_ops;
 	set->nr_hw_queues = 1;
 	set->queue_depth = 128;
 	set->numa_node = NUMA_NO_NODE;
-- 
GitLab


From 030a2c689fb46e1690f7ded8b194bab7678efb28 Mon Sep 17 00:00:00 2001
From: Michael Neuling <mikey@neuling.org>
Date: Mon, 3 Aug 2020 13:56:00 +1000
Subject: [PATCH 0096/1341] powerpc: Fix P10 PVR revision in /proc/cpuinfo for
 SMT4 cores

On POWER10 bit 12 in the PVR indicates if the core is SMT4 or SMT8.
Bit 12 is set for SMT4.

Without this patch, /proc/cpuinfo on a SMT4 DD1 POWER10 looks like
this:
  cpu             : POWER10, altivec supported
  revision        : 17.0 (pvr 0080 1100)

Fixes: a3ea40d5c736 ("powerpc: Add POWER10 architected mode")
Cc: stable@vger.kernel.org # v5.8
Signed-off-by: Michael Neuling <mikey@neuling.org>
Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200803035600.1820371-1-mikey@neuling.org
---
 arch/powerpc/kernel/setup-common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index b198b0ff25bcf..808ec9fab6052 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -311,6 +311,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 				min = pvr & 0xFF;
 				break;
 			case 0x004e: /* POWER9 bits 12-15 give chip type */
+			case 0x0080: /* POWER10 bit 12 gives SMT8/4 */
 				maj = (pvr >> 8) & 0x0F;
 				min = pvr & 0xFF;
 				break;
-- 
GitLab


From 781fa4811d95314c1965c0c3337c9ac36ef26093 Mon Sep 17 00:00:00 2001
From: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Date: Fri, 7 Aug 2020 06:05:00 -0400
Subject: [PATCH 0097/1341] powerpc/perf: Add support for outputting extended
 regs in perf intr_regs

Add support for perf extended register capability in powerpc. The
capability flag PERF_PMU_CAP_EXTENDED_REGS, is used to indicate the
PMU which support extended registers. The generic code define the mask
of extended registers as 0 for non supported architectures.

Patch adds extended regs support for power9 platform by exposing
MMCR0, MMCR1 and MMCR2 registers.

REG_RESERVED mask needs update to include extended regs.
PERF_REG_EXTENDED_MASK, contains mask value of the supported
registers, is defined at runtime in the kernel based on platform since
the supported registers may differ from one processor version to
another and hence the MASK value.

With the patch:

  available registers: r0 r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11
  r12 r13 r14 r15 r16 r17 r18 r19 r20 r21 r22 r23 r24 r25 r26
  r27 r28 r29 r30 r31 nip msr orig_r3 ctr link xer ccr softe
  trap dar dsisr sier mmcra mmcr0 mmcr1 mmcr2

  PERF_RECORD_SAMPLE(IP, 0x1): 4784/4784: 0 period: 1 addr: 0
  ... intr regs: mask 0xffffffffffff ABI 64-bit
  .... r0    0xc00000000012b77c
  .... r1    0xc000003fe5e03930
  .... r2    0xc000000001b0e000
  .... r3    0xc000003fdcddf800
  .... r4    0xc000003fc7880000
  .... r5    0x9c422724be
  .... r6    0xc000003fe5e03908
  .... r7    0xffffff63bddc8706
  .... r8    0x9e4
  .... r9    0x0
  .... r10   0x1
  .... r11   0x0
  .... r12   0xc0000000001299c0
  .... r13   0xc000003ffffc4800
  .... r14   0x0
  .... r15   0x7fffdd8b8b00
  .... r16   0x0
  .... r17   0x7fffdd8be6b8
  .... r18   0x7e7076607730
  .... r19   0x2f
  .... r20   0xc00000001fc26c68
  .... r21   0xc0002041e4227e00
  .... r22   0xc00000002018fb60
  .... r23   0x1
  .... r24   0xc000003ffec4d900
  .... r25   0x80000000
  .... r26   0x0
  .... r27   0x1
  .... r28   0x1
  .... r29   0xc000000001be1260
  .... r30   0x6008010
  .... r31   0xc000003ffebb7218
  .... nip   0xc00000000012b910
  .... msr   0x9000000000009033
  .... orig_r3 0xc00000000012b86c
  .... ctr   0xc0000000001299c0
  .... link  0xc00000000012b77c
  .... xer   0x0
  .... ccr   0x28002222
  .... softe 0x1
  .... trap  0xf00
  .... dar   0x0
  .... dsisr 0x80000000000
  .... sier  0x0
  .... mmcra 0x80000000000
  .... mmcr0 0x82008090
  .... mmcr1 0x1e000000
  .... mmcr2 0x0
   ... thread: perf:4784

Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Tested-by: Nageswara R Sastry <nasastry@in.ibm.com>
Reviewed-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Reviewed-by: Kajol Jain <kjain@linux.ibm.com>
Reviewed-and-tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1596794701-23530-2-git-send-email-atrajeev@linux.vnet.ibm.com
---
 arch/powerpc/include/asm/perf_event.h        |  3 ++
 arch/powerpc/include/asm/perf_event_server.h |  5 +++
 arch/powerpc/include/uapi/asm/perf_regs.h    | 14 +++++++-
 arch/powerpc/perf/core-book3s.c              |  1 +
 arch/powerpc/perf/perf_regs.c                | 34 ++++++++++++++++++--
 arch/powerpc/perf/power9-pmu.c               |  6 ++++
 6 files changed, 59 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/include/asm/perf_event.h b/arch/powerpc/include/asm/perf_event.h
index 1e8b2e1ec1db6..daec64d41b447 100644
--- a/arch/powerpc/include/asm/perf_event.h
+++ b/arch/powerpc/include/asm/perf_event.h
@@ -40,4 +40,7 @@ static inline bool is_sier_available(void) { return false; }
 
 /* To support perf_regs sier update */
 extern bool is_sier_available(void);
+/* To define perf extended regs mask value */
+extern u64 PERF_REG_EXTENDED_MASK;
+#define PERF_REG_EXTENDED_MASK	PERF_REG_EXTENDED_MASK
 #endif
diff --git a/arch/powerpc/include/asm/perf_event_server.h b/arch/powerpc/include/asm/perf_event_server.h
index 86c9eb064b22b..f6acabb6c9be8 100644
--- a/arch/powerpc/include/asm/perf_event_server.h
+++ b/arch/powerpc/include/asm/perf_event_server.h
@@ -62,6 +62,11 @@ struct power_pmu {
 	int 		*blacklist_ev;
 	/* BHRB entries in the PMU */
 	int		bhrb_nr;
+	/*
+	 * set this flag with `PERF_PMU_CAP_EXTENDED_REGS` if
+	 * the pmu supports extended perf regs capability
+	 */
+	int		capabilities;
 };
 
 /*
diff --git a/arch/powerpc/include/uapi/asm/perf_regs.h b/arch/powerpc/include/uapi/asm/perf_regs.h
index f599064dd8dc8..225c64c568135 100644
--- a/arch/powerpc/include/uapi/asm/perf_regs.h
+++ b/arch/powerpc/include/uapi/asm/perf_regs.h
@@ -48,6 +48,18 @@ enum perf_event_powerpc_regs {
 	PERF_REG_POWERPC_DSISR,
 	PERF_REG_POWERPC_SIER,
 	PERF_REG_POWERPC_MMCRA,
-	PERF_REG_POWERPC_MAX,
+	/* Extended registers */
+	PERF_REG_POWERPC_MMCR0,
+	PERF_REG_POWERPC_MMCR1,
+	PERF_REG_POWERPC_MMCR2,
+	/* Max regs without the extended regs */
+	PERF_REG_POWERPC_MAX = PERF_REG_POWERPC_MMCRA + 1,
 };
+
+#define PERF_REG_PMU_MASK	((1ULL << PERF_REG_POWERPC_MAX) - 1)
+
+/* PERF_REG_EXTENDED_MASK value for CPU_FTR_ARCH_300 */
+#define PERF_REG_PMU_MASK_300   (((1ULL << (PERF_REG_POWERPC_MMCR2 + 1)) - 1) - PERF_REG_PMU_MASK)
+
+#define PERF_REG_MAX_ISA_300   (PERF_REG_POWERPC_MMCR2 + 1)
 #endif /* _UAPI_ASM_POWERPC_PERF_REGS_H */
diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 78fe349865942..00038650a007f 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -2323,6 +2323,7 @@ int register_power_pmu(struct power_pmu *pmu)
 		pmu->name);
 
 	power_pmu.attr_groups = ppmu->attr_groups;
+	power_pmu.capabilities |= (ppmu->capabilities & PERF_PMU_CAP_EXTENDED_REGS);
 
 #ifdef MSR_HV
 	/*
diff --git a/arch/powerpc/perf/perf_regs.c b/arch/powerpc/perf/perf_regs.c
index a213a0aa5d25c..9301e6852d532 100644
--- a/arch/powerpc/perf/perf_regs.c
+++ b/arch/powerpc/perf/perf_regs.c
@@ -13,9 +13,11 @@
 #include <asm/ptrace.h>
 #include <asm/perf_regs.h>
 
+u64 PERF_REG_EXTENDED_MASK;
+
 #define PT_REGS_OFFSET(id, r) [id] = offsetof(struct pt_regs, r)
 
-#define REG_RESERVED (~((1ULL << PERF_REG_POWERPC_MAX) - 1))
+#define REG_RESERVED (~(PERF_REG_EXTENDED_MASK | PERF_REG_PMU_MASK))
 
 static unsigned int pt_regs_offset[PERF_REG_POWERPC_MAX] = {
 	PT_REGS_OFFSET(PERF_REG_POWERPC_R0,  gpr[0]),
@@ -69,10 +71,26 @@ static unsigned int pt_regs_offset[PERF_REG_POWERPC_MAX] = {
 	PT_REGS_OFFSET(PERF_REG_POWERPC_MMCRA, dsisr),
 };
 
+/* Function to return the extended register values */
+static u64 get_ext_regs_value(int idx)
+{
+	switch (idx) {
+	case PERF_REG_POWERPC_MMCR0:
+		return mfspr(SPRN_MMCR0);
+	case PERF_REG_POWERPC_MMCR1:
+		return mfspr(SPRN_MMCR1);
+	case PERF_REG_POWERPC_MMCR2:
+		return mfspr(SPRN_MMCR2);
+	default: return 0;
+	}
+}
+
 u64 perf_reg_value(struct pt_regs *regs, int idx)
 {
-	if (WARN_ON_ONCE(idx >= PERF_REG_POWERPC_MAX))
-		return 0;
+	u64 perf_reg_extended_max = PERF_REG_POWERPC_MAX;
+
+	if (cpu_has_feature(CPU_FTR_ARCH_300))
+		perf_reg_extended_max = PERF_REG_MAX_ISA_300;
 
 	if (idx == PERF_REG_POWERPC_SIER &&
 	   (IS_ENABLED(CONFIG_FSL_EMB_PERF_EVENT) ||
@@ -85,6 +103,16 @@ u64 perf_reg_value(struct pt_regs *regs, int idx)
 	    IS_ENABLED(CONFIG_PPC32)))
 		return 0;
 
+	if (idx >= PERF_REG_POWERPC_MAX && idx < perf_reg_extended_max)
+		return get_ext_regs_value(idx);
+
+	/*
+	 * If the idx is referring to value beyond the
+	 * supported registers, return 0 with a warning
+	 */
+	if (WARN_ON_ONCE(idx >= perf_reg_extended_max))
+		return 0;
+
 	return regs_get_register(regs, pt_regs_offset[idx]);
 }
 
diff --git a/arch/powerpc/perf/power9-pmu.c b/arch/powerpc/perf/power9-pmu.c
index 05dae38b969a5..2a57e93a79dcf 100644
--- a/arch/powerpc/perf/power9-pmu.c
+++ b/arch/powerpc/perf/power9-pmu.c
@@ -90,6 +90,8 @@ enum {
 #define POWER9_MMCRA_IFM3		0x00000000C0000000UL
 #define POWER9_MMCRA_BHRB_MASK		0x00000000C0000000UL
 
+extern u64 PERF_REG_EXTENDED_MASK;
+
 /* Nasty Power9 specific hack */
 #define PVR_POWER9_CUMULUS		0x00002000
 
@@ -434,6 +436,7 @@ static struct power_pmu power9_pmu = {
 	.cache_events		= &power9_cache_events,
 	.attr_groups		= power9_pmu_attr_groups,
 	.bhrb_nr		= 32,
+	.capabilities           = PERF_PMU_CAP_EXTENDED_REGS,
 };
 
 int init_power9_pmu(void)
@@ -457,6 +460,9 @@ int init_power9_pmu(void)
 		}
 	}
 
+	/* Set the PERF_REG_EXTENDED_MASK here */
+	PERF_REG_EXTENDED_MASK = PERF_REG_PMU_MASK_300;
+
 	rc = register_power_pmu(&power9_pmu);
 	if (rc)
 		return rc;
-- 
GitLab


From d735599a069f6936c1392e07075c34a19bda949a Mon Sep 17 00:00:00 2001
From: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Date: Fri, 7 Aug 2020 06:05:01 -0400
Subject: [PATCH 0098/1341] powerpc/perf: Add extended regs support for power10
 platform

Include capability flag PERF_PMU_CAP_EXTENDED_REGS for power10 and
expose MMCR3, SIER2, SIER3 registers as part of extended regs. Also
introduce PERF_REG_PMU_MASK_31 to define extended mask value at
runtime for power10.

Suggested-by: Ryan Grimm <grimm@linux.ibm.com>
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Tested-by: Nageswara R Sastry <nasastry@in.ibm.com>
Reviewed-by: Kajol Jain <kjain@linux.ibm.com>
Reviewed-and-tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1596794701-23530-3-git-send-email-atrajeev@linux.vnet.ibm.com
---
 arch/powerpc/include/uapi/asm/perf_regs.h |  6 ++++++
 arch/powerpc/perf/perf_regs.c             | 12 +++++++++++-
 arch/powerpc/perf/power10-pmu.c           |  6 ++++++
 3 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/uapi/asm/perf_regs.h b/arch/powerpc/include/uapi/asm/perf_regs.h
index 225c64c568135..bdf5f10f8b9f5 100644
--- a/arch/powerpc/include/uapi/asm/perf_regs.h
+++ b/arch/powerpc/include/uapi/asm/perf_regs.h
@@ -52,6 +52,9 @@ enum perf_event_powerpc_regs {
 	PERF_REG_POWERPC_MMCR0,
 	PERF_REG_POWERPC_MMCR1,
 	PERF_REG_POWERPC_MMCR2,
+	PERF_REG_POWERPC_MMCR3,
+	PERF_REG_POWERPC_SIER2,
+	PERF_REG_POWERPC_SIER3,
 	/* Max regs without the extended regs */
 	PERF_REG_POWERPC_MAX = PERF_REG_POWERPC_MMCRA + 1,
 };
@@ -60,6 +63,9 @@ enum perf_event_powerpc_regs {
 
 /* PERF_REG_EXTENDED_MASK value for CPU_FTR_ARCH_300 */
 #define PERF_REG_PMU_MASK_300   (((1ULL << (PERF_REG_POWERPC_MMCR2 + 1)) - 1) - PERF_REG_PMU_MASK)
+/* PERF_REG_EXTENDED_MASK value for CPU_FTR_ARCH_31 */
+#define PERF_REG_PMU_MASK_31   (((1ULL << (PERF_REG_POWERPC_SIER3 + 1)) - 1) - PERF_REG_PMU_MASK)
 
 #define PERF_REG_MAX_ISA_300   (PERF_REG_POWERPC_MMCR2 + 1)
+#define PERF_REG_MAX_ISA_31    (PERF_REG_POWERPC_SIER3 + 1)
 #endif /* _UAPI_ASM_POWERPC_PERF_REGS_H */
diff --git a/arch/powerpc/perf/perf_regs.c b/arch/powerpc/perf/perf_regs.c
index 9301e6852d532..8e53f2fc3fe07 100644
--- a/arch/powerpc/perf/perf_regs.c
+++ b/arch/powerpc/perf/perf_regs.c
@@ -81,6 +81,14 @@ static u64 get_ext_regs_value(int idx)
 		return mfspr(SPRN_MMCR1);
 	case PERF_REG_POWERPC_MMCR2:
 		return mfspr(SPRN_MMCR2);
+#ifdef CONFIG_PPC64
+	case PERF_REG_POWERPC_MMCR3:
+		return mfspr(SPRN_MMCR3);
+	case PERF_REG_POWERPC_SIER2:
+		return mfspr(SPRN_SIER2);
+	case PERF_REG_POWERPC_SIER3:
+		return mfspr(SPRN_SIER3);
+#endif
 	default: return 0;
 	}
 }
@@ -89,7 +97,9 @@ u64 perf_reg_value(struct pt_regs *regs, int idx)
 {
 	u64 perf_reg_extended_max = PERF_REG_POWERPC_MAX;
 
-	if (cpu_has_feature(CPU_FTR_ARCH_300))
+	if (cpu_has_feature(CPU_FTR_ARCH_31))
+		perf_reg_extended_max = PERF_REG_MAX_ISA_31;
+	else if (cpu_has_feature(CPU_FTR_ARCH_300))
 		perf_reg_extended_max = PERF_REG_MAX_ISA_300;
 
 	if (idx == PERF_REG_POWERPC_SIER &&
diff --git a/arch/powerpc/perf/power10-pmu.c b/arch/powerpc/perf/power10-pmu.c
index f7cff7f36a1cd..83148656b5241 100644
--- a/arch/powerpc/perf/power10-pmu.c
+++ b/arch/powerpc/perf/power10-pmu.c
@@ -87,6 +87,8 @@
 #define POWER10_MMCRA_IFM3		0x00000000C0000000UL
 #define POWER10_MMCRA_BHRB_MASK		0x00000000C0000000UL
 
+extern u64 PERF_REG_EXTENDED_MASK;
+
 /* Table of alternatives, sorted by column 0 */
 static const unsigned int power10_event_alternatives[][MAX_ALT] = {
 	{ PM_RUN_CYC_ALT,		PM_RUN_CYC },
@@ -397,6 +399,7 @@ static struct power_pmu power10_pmu = {
 	.cache_events		= &power10_cache_events,
 	.attr_groups		= power10_pmu_attr_groups,
 	.bhrb_nr		= 32,
+	.capabilities           = PERF_PMU_CAP_EXTENDED_REGS,
 };
 
 int init_power10_pmu(void)
@@ -408,6 +411,9 @@ int init_power10_pmu(void)
 	    strcmp(cur_cpu_spec->oprofile_cpu_type, "ppc64/power10"))
 		return -ENODEV;
 
+	/* Set the PERF_REG_EXTENDED_MASK here */
+	PERF_REG_EXTENDED_MASK = PERF_REG_PMU_MASK_31;
+
 	rc = register_power_pmu(&power10_pmu);
 	if (rc)
 		return rc;
-- 
GitLab


From e276c9bd14c75278d1354efbaea278500147d6b3 Mon Sep 17 00:00:00 2001
From: Xu Wang <vulab@iscas.ac.cn>
Date: Mon, 17 Aug 2020 03:29:13 +0000
Subject: [PATCH 0099/1341] ata: ahci: use ata_link_info() instead of
 ata_link_printk()

Using ata_link_info() instead of ata_link_printk().

Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/ata/ahci.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 0c0a736eb8613..fbd8eaa32d325 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -807,8 +807,7 @@ static int ahci_avn_hardreset(struct ata_link *link, unsigned int *class,
 				(sstatus & 0xf) != 1)
 			break;
 
-		ata_link_printk(link, KERN_INFO, "avn bounce port%d\n",
-				port);
+		ata_link_info(link,  "avn bounce port%d\n", port);
 
 		pci_read_config_word(pdev, 0x92, &val);
 		val &= ~(1 << port);
-- 
GitLab


From d86f9088938e637de5908ed463b023eee4d1b9e1 Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Sat, 25 Jul 2020 03:16:24 +0000
Subject: [PATCH 0100/1341] phy: qualcomm: fix platform_no_drv_owner.cocci
 warnings

Remove .owner field if calls are used which set it automatically
Generated by: scripts/coccinelle/api/platform_no_drv_owner.cocci

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Link: https://lore.kernel.org/r/20200725031624.31432-1-yuehaibing@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c b/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
index 71f257b4a7f5d..6707efd386806 100644
--- a/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
+++ b/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
@@ -557,7 +557,6 @@ static struct platform_driver qcom_ipq806x_usb_phy_driver = {
 	.probe		= qcom_ipq806x_usb_phy_probe,
 	.driver		= {
 		.name	= "qcom-ipq806x-usb-phy",
-		.owner	= THIS_MODULE,
 		.of_match_table = qcom_ipq806x_usb_phy_table,
 	},
 };
-- 
GitLab


From 04db2304a9495b98b8976c9a8cc5f9845be35ba8 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Thu, 23 Jul 2020 11:36:22 +0000
Subject: [PATCH 0101/1341] phy: qualcomm: fix return value check in
 qcom_ipq806x_usb_phy_probe()

In case of error, the function devm_ioremap() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Fixes: ef19b117b834 ("phy: qualcomm: add qcom ipq806x dwc usb phy driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20200723113622.136752-1-weiyongjun1@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c b/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
index 6707efd386806..9061ece7ff6ab 100644
--- a/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
+++ b/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
@@ -505,9 +505,9 @@ static int qcom_ipq806x_usb_phy_probe(struct platform_device *pdev)
 	size = resource_size(res);
 	phy_dwc3->base = devm_ioremap(phy_dwc3->dev, res->start, size);
 
-	if (IS_ERR(phy_dwc3->base)) {
+	if (!phy_dwc3->base) {
 		dev_err(phy_dwc3->dev, "failed to map reg\n");
-		return PTR_ERR(phy_dwc3->base);
+		return -ENOMEM;
 	}
 
 	phy_dwc3->ref_clk = devm_clk_get(phy_dwc3->dev, "ref");
-- 
GitLab


From 327da008e65a25b8206b36b7fc0c9e4edbb36a58 Mon Sep 17 00:00:00 2001
From: Madhavan Srinivasan <maddy@linux.ibm.com>
Date: Mon, 17 Aug 2020 06:26:18 +0530
Subject: [PATCH 0102/1341] powerpc: Add POWER10 raw mode cputable entry

Add a raw mode cputable entry for POWER10. Copies most of the fields
from commit a3ea40d5c736 ("powerpc: Add POWER10 architected mode")
except for oprofile_cpu_type, machine_check_early, pvr_mask and
pvr_mask fields. On bare metal systems we use DT CPU features, which
doesn't need a cputable entry. But in VMs we still rely on the raw
cputable entry to set the correct values for the PMU related fields.

Fixes: a3ea40d5c736 ("powerpc: Add POWER10 architected mode")
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
[mpe: Reorder vs cleanup patch and add Fixes tag]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200817005618.3305028-2-maddy@linux.ibm.com
---
 arch/powerpc/kernel/cputable.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 3d406a9626e86..93b9866606647 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -75,6 +75,7 @@ extern void __restore_cpu_power10(void);
 extern long __machine_check_early_realmode_p7(struct pt_regs *regs);
 extern long __machine_check_early_realmode_p8(struct pt_regs *regs);
 extern long __machine_check_early_realmode_p9(struct pt_regs *regs);
+extern long __machine_check_early_realmode_p10(struct pt_regs *regs);
 #endif /* CONFIG_PPC64 */
 #if defined(CONFIG_E500)
 extern void __setup_cpu_e5500(unsigned long offset, struct cpu_spec* spec);
@@ -542,6 +543,25 @@ static struct cpu_spec __initdata cpu_specs[] = {
 		.machine_check_early	= __machine_check_early_realmode_p9,
 		.platform		= "power9",
 	},
+	{	/* Power10 */
+		.pvr_mask		= 0xffff0000,
+		.pvr_value		= 0x00800000,
+		.cpu_name		= "POWER10 (raw)",
+		.cpu_features		= CPU_FTRS_POWER10,
+		.cpu_user_features	= COMMON_USER_POWER10,
+		.cpu_user_features2	= COMMON_USER2_POWER10,
+		.mmu_features		= MMU_FTRS_POWER10,
+		.icache_bsize		= 128,
+		.dcache_bsize		= 128,
+		.num_pmcs		= 6,
+		.pmc_type		= PPC_PMC_IBM,
+		.oprofile_cpu_type	= "ppc64/power10",
+		.oprofile_type		= PPC_OPROFILE_INVALID,
+		.cpu_setup		= __setup_cpu_power10,
+		.cpu_restore		= __restore_cpu_power10,
+		.machine_check_early	= __machine_check_early_realmode_p10,
+		.platform		= "power10",
+	},
 	{	/* Cell Broadband Engine */
 		.pvr_mask		= 0xffff0000,
 		.pvr_value		= 0x00700000,
-- 
GitLab


From 388692e943a58f28aac0fe83e75f5994da9ff8a1 Mon Sep 17 00:00:00 2001
From: Madhavan Srinivasan <maddy@linux.ibm.com>
Date: Mon, 17 Aug 2020 06:26:17 +0530
Subject: [PATCH 0103/1341] powerpc/kernel: Cleanup machine check function
 declarations

__machine_check_early_realmode_p*() are currently declared as extern
in cputable.c and because of this when compiled with "C=1" (which
enables semantic checker) produces these warnings.

    CHECK   arch/powerpc/kernel/mce_power.c
  arch/powerpc/kernel/mce_power.c:709:6: warning: symbol '__machine_check_early_realmode_p7' was not declared. Should it be static?
  arch/powerpc/kernel/mce_power.c:717:6: warning: symbol '__machine_check_early_realmode_p8' was not declared. Should it be static?
  arch/powerpc/kernel/mce_power.c:722:6: warning: symbol '__machine_check_early_realmode_p9' was not declared. Should it be static?
  arch/powerpc/kernel/mce_power.c:740:6: warning: symbol '__machine_check_early_realmode_p10' was not declared. Should it be static?

Patch here moves the declaration to asm/mce.h and includes the same in
cputable.c

Fixes: ae744f3432d3 ("powerpc/book3s: Flush SLB/TLBs if we get SLB/TLB machine check errors on power8")
Fixes: 7b9f71f974a1 ("powerpc/64s: POWER9 machine check handler")
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200817005618.3305028-1-maddy@linux.ibm.com
---
 arch/powerpc/include/asm/cputable.h | 5 +++++
 arch/powerpc/include/asm/mce.h      | 7 +++++++
 arch/powerpc/kernel/cputable.c      | 4 ----
 arch/powerpc/kernel/dt_cpu_ftrs.c   | 4 ----
 4 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index fdddb822d564b..e005b45810232 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -9,6 +9,11 @@
 
 #ifndef __ASSEMBLY__
 
+/*
+ * Added to include __machine_check_early_realmode_* functions
+ */
+#include <asm/mce.h>
+
 /* This structure can grow, it's real size is used by head.S code
  * via the mkdefs mechanism.
  */
diff --git a/arch/powerpc/include/asm/mce.h b/arch/powerpc/include/asm/mce.h
index adf2cda67f9a4..89aa8248a57dd 100644
--- a/arch/powerpc/include/asm/mce.h
+++ b/arch/powerpc/include/asm/mce.h
@@ -210,6 +210,9 @@ struct mce_error_info {
 #define MCE_EVENT_RELEASE	true
 #define MCE_EVENT_DONTRELEASE	false
 
+struct pt_regs;
+struct notifier_block;
+
 extern void save_mce_event(struct pt_regs *regs, long handled,
 			   struct mce_error_info *mce_err, uint64_t nip,
 			   uint64_t addr, uint64_t phys_addr);
@@ -225,5 +228,9 @@ int mce_register_notifier(struct notifier_block *nb);
 int mce_unregister_notifier(struct notifier_block *nb);
 #ifdef CONFIG_PPC_BOOK3S_64
 void flush_and_reload_slb(void);
+long __machine_check_early_realmode_p7(struct pt_regs *regs);
+long __machine_check_early_realmode_p8(struct pt_regs *regs);
+long __machine_check_early_realmode_p9(struct pt_regs *regs);
+long __machine_check_early_realmode_p10(struct pt_regs *regs);
 #endif /* CONFIG_PPC_BOOK3S_64 */
 #endif /* __ASM_PPC64_MCE_H__ */
diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 93b9866606647..2aa89c6b28967 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -72,10 +72,6 @@ extern void __setup_cpu_power9(unsigned long offset, struct cpu_spec* spec);
 extern void __restore_cpu_power9(void);
 extern void __setup_cpu_power10(unsigned long offset, struct cpu_spec* spec);
 extern void __restore_cpu_power10(void);
-extern long __machine_check_early_realmode_p7(struct pt_regs *regs);
-extern long __machine_check_early_realmode_p8(struct pt_regs *regs);
-extern long __machine_check_early_realmode_p9(struct pt_regs *regs);
-extern long __machine_check_early_realmode_p10(struct pt_regs *regs);
 #endif /* CONFIG_PPC64 */
 #if defined(CONFIG_E500)
 extern void __setup_cpu_e5500(unsigned long offset, struct cpu_spec* spec);
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index 6f8c0c6b937a1..8dc46f38680b2 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -64,10 +64,6 @@ struct dt_cpu_feature {
  * Set up the base CPU
  */
 
-extern long __machine_check_early_realmode_p8(struct pt_regs *regs);
-extern long __machine_check_early_realmode_p9(struct pt_regs *regs);
-extern long __machine_check_early_realmode_p10(struct pt_regs *regs);
-
 static int hv_mode;
 
 static struct {
-- 
GitLab


From e5ed6069b7d8a41e4de09e8edf783f6b1a83b48f Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Tue, 21 Jul 2020 13:59:58 -0700
Subject: [PATCH 0104/1341] ARC: pgalloc.h: delete a duplicated word + other
 fixes

Drop the repeated word "to".
Change "Thay" to "That".
Add a closing right parenthesis.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: linux-snps-arc@lists.infradead.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 arch/arc/include/asm/pgalloc.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arc/include/asm/pgalloc.h b/arch/arc/include/asm/pgalloc.h
index b747f2ec29287..6147db9252487 100644
--- a/arch/arc/include/asm/pgalloc.h
+++ b/arch/arc/include/asm/pgalloc.h
@@ -18,10 +18,10 @@
  * vineetg: April 2010
  *  -Switched pgtable_t from being struct page * to unsigned long
  *      =Needed so that Page Table allocator (pte_alloc_one) is not forced to
- *       to deal with struct page. Thay way in future we can make it allocate
+ *       deal with struct page. That way in future we can make it allocate
  *       multiple PG Tbls in one Page Frame
  *      =sweet side effect is avoiding calls to ugly page_address( ) from the
- *       pg-tlb allocator sub-sys (pte_alloc_one, ptr_free, pmd_populate
+ *       pg-tlb allocator sub-sys (pte_alloc_one, ptr_free, pmd_populate)
  *
  *  Amit Bhor, Sameer Dhavale: Codito Technologies 2004
  */
-- 
GitLab


From feb92d7d3813456c11dce215b3421801a78a8986 Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Sun, 26 Jul 2020 21:51:59 -0700
Subject: [PATCH 0105/1341] ARC: perf: don't bail setup if pct irq missing in
 device-tree

Current code inadventely bails if hardware supports sampling/overflow
interrupts, but the irq is missing from device tree.

|
| # perf stat -e cycles,instructions,major-faults,minor-faults ../hackbench
| Running with 10 groups 400 process
| Time: 0.921
|
| Performance counter stats for '../hackbench':
|
|   <not supported>      cycles
|   <not supported>      instructions
|                 0      major-faults
|              8679      minor-faults

This need not be as we can still do simple counting based perf stat.
This unborks perf on HSDK-4xD

Cc: <stable@vger.kernel.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 arch/arc/kernel/perf_event.c | 14 ++++----------
 1 file changed, 4 insertions(+), 10 deletions(-)

diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index 661fd842ea97d..79849f37e782c 100644
--- a/arch/arc/kernel/perf_event.c
+++ b/arch/arc/kernel/perf_event.c
@@ -562,7 +562,7 @@ static int arc_pmu_device_probe(struct platform_device *pdev)
 {
 	struct arc_reg_pct_build pct_bcr;
 	struct arc_reg_cc_build cc_bcr;
-	int i, has_interrupts;
+	int i, has_interrupts, irq;
 	int counter_size;	/* in bits */
 
 	union cc_name {
@@ -637,13 +637,7 @@ static int arc_pmu_device_probe(struct platform_device *pdev)
 		.attr_groups	= arc_pmu->attr_groups,
 	};
 
-	if (has_interrupts) {
-		int irq = platform_get_irq(pdev, 0);
-
-		if (irq < 0) {
-			pr_err("Cannot get IRQ number for the platform\n");
-			return -ENODEV;
-		}
+	if (has_interrupts && (irq = platform_get_irq(pdev, 0) >= 0)) {
 
 		arc_pmu->irq = irq;
 
@@ -652,9 +646,9 @@ static int arc_pmu_device_probe(struct platform_device *pdev)
 				   this_cpu_ptr(&arc_pmu_cpu));
 
 		on_each_cpu(arc_cpu_pmu_irq_init, &irq, 1);
-
-	} else
+	} else {
 		arc_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
+	}
 
 	/*
 	 * perf parser doesn't really like '-' symbol in events name, so let's
-- 
GitLab


From fe81d927b78c4f0557836661d32e41ebc957b024 Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Thu, 9 Jul 2020 19:52:32 -0700
Subject: [PATCH 0106/1341] ARC: HSDK: wireup perf irq

Newer version of HSDK aka HSDK-4xD (with dual issue HS48x4 CPU) wired up
the perf interrupt, so enable that in DT.
This is OK for old HSDK where this irq is ignored because pct irq is not
wired up in hardware.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 arch/arc/boot/dts/hsdk.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index 9acbeba832c0b..5d64a5a940ee6 100644
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -88,6 +88,8 @@ idu_intc: idu-interrupt-controller {
 
 	arcpct: pct {
 		compatible = "snps,archs-pct";
+		interrupt-parent = <&cpu_intc>;
+		interrupts = <20>;
 	};
 
 	/* TIMER0 with interrupt for clockevent */
-- 
GitLab


From 7eb48dd094de5fe0e216b550e73aa85257903973 Mon Sep 17 00:00:00 2001
From: Hanjun Guo <guohanjun@huawei.com>
Date: Wed, 22 Jul 2020 17:54:21 +0800
Subject: [PATCH 0107/1341] dmaengine: acpi: Put the CSRT table after using it

The acpi_get_table() should be coupled with acpi_put_table() if
the mapped table is not used at runtime to release the table
mapping, put the CSRT table buf after using it.

Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Link: https://lore.kernel.org/r/1595411661-15936-1-git-send-email-guohanjun@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/acpi-dma.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/acpi-dma.c b/drivers/dma/acpi-dma.c
index 35f4804ea4afa..235f1396f9686 100644
--- a/drivers/dma/acpi-dma.c
+++ b/drivers/dma/acpi-dma.c
@@ -135,11 +135,13 @@ static void acpi_dma_parse_csrt(struct acpi_device *adev, struct acpi_dma *adma)
 		if (ret < 0) {
 			dev_warn(&adev->dev,
 				 "error in parsing resource group\n");
-			return;
+			break;
 		}
 
 		grp = (struct acpi_csrt_group *)((void *)grp + grp->length);
 	}
+
+	acpi_put_table((struct acpi_table_header *)csrt);
 }
 
 /**
-- 
GitLab


From df841b17e809f48f740cd2dd8b63543073c91a02 Mon Sep 17 00:00:00 2001
From: Dave Jiang <dave.jiang@intel.com>
Date: Mon, 27 Jul 2020 09:37:11 -0700
Subject: [PATCH 0108/1341] dmaengine: idxd: reset states after device disable
 or reset

The state for WQs should be reset to disabled when a device is reset or
disabled.

Fixes: da32b28c95a7 ("dmaengine: idxd: cleanup workqueue config after disabling")
Reported-by: Mona Hossain <mona.hossain@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/159586777684.27150.17589406415773568534.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/idxd/device.c | 26 ++++++++++++++++++++++++++
 drivers/dma/idxd/irq.c    | 12 ------------
 2 files changed, 26 insertions(+), 12 deletions(-)

diff --git a/drivers/dma/idxd/device.c b/drivers/dma/idxd/device.c
index 14b45853aa5fc..b75d699160bfa 100644
--- a/drivers/dma/idxd/device.c
+++ b/drivers/dma/idxd/device.c
@@ -410,10 +410,27 @@ int idxd_device_enable(struct idxd_device *idxd)
 	return 0;
 }
 
+void idxd_device_wqs_clear_state(struct idxd_device *idxd)
+{
+	int i;
+
+	lockdep_assert_held(&idxd->dev_lock);
+
+	for (i = 0; i < idxd->max_wqs; i++) {
+		struct idxd_wq *wq = &idxd->wqs[i];
+
+		if (wq->state == IDXD_WQ_ENABLED) {
+			idxd_wq_disable_cleanup(wq);
+			wq->state = IDXD_WQ_DISABLED;
+		}
+	}
+}
+
 int idxd_device_disable(struct idxd_device *idxd)
 {
 	struct device *dev = &idxd->pdev->dev;
 	u32 status;
+	unsigned long flags;
 
 	if (!idxd_is_enabled(idxd)) {
 		dev_dbg(dev, "Device is not enabled\n");
@@ -429,13 +446,22 @@ int idxd_device_disable(struct idxd_device *idxd)
 		return -ENXIO;
 	}
 
+	spin_lock_irqsave(&idxd->dev_lock, flags);
+	idxd_device_wqs_clear_state(idxd);
 	idxd->state = IDXD_DEV_CONF_READY;
+	spin_unlock_irqrestore(&idxd->dev_lock, flags);
 	return 0;
 }
 
 void idxd_device_reset(struct idxd_device *idxd)
 {
+	unsigned long flags;
+
 	idxd_cmd_exec(idxd, IDXD_CMD_RESET_DEVICE, 0, NULL);
+	spin_lock_irqsave(&idxd->dev_lock, flags);
+	idxd_device_wqs_clear_state(idxd);
+	idxd->state = IDXD_DEV_CONF_READY;
+	spin_unlock_irqrestore(&idxd->dev_lock, flags);
 }
 
 /* Device configuration bits */
diff --git a/drivers/dma/idxd/irq.c b/drivers/dma/idxd/irq.c
index b5142556cc4e8..1e9e6991f543d 100644
--- a/drivers/dma/idxd/irq.c
+++ b/drivers/dma/idxd/irq.c
@@ -11,18 +11,6 @@
 #include "idxd.h"
 #include "registers.h"
 
-void idxd_device_wqs_clear_state(struct idxd_device *idxd)
-{
-	int i;
-
-	lockdep_assert_held(&idxd->dev_lock);
-	for (i = 0; i < idxd->max_wqs; i++) {
-		struct idxd_wq *wq = &idxd->wqs[i];
-
-		wq->state = IDXD_WQ_DISABLED;
-	}
-}
-
 static void idxd_device_reinit(struct work_struct *work)
 {
 	struct idxd_device *idxd = container_of(work, struct idxd_device, work);
-- 
GitLab


From 8979ef70850eb469e1094279259d1ef393ffe85f Mon Sep 17 00:00:00 2001
From: Stephen Boyd <swboyd@chromium.org>
Date: Tue, 11 Aug 2020 14:28:36 -0700
Subject: [PATCH 0109/1341] opp: Put opp table in dev_pm_opp_set_rate() for
 empty tables

We get the opp_table pointer at the top of the function and so we should
put the pointer at the end of the function like all other exit paths
from this function do.

Cc: v5.7+ <stable@vger.kernel.org> # v5.7+
Fixes: aca48b61f963 ("opp: Manage empty OPP tables with clk handle")
Reviewed-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
[ Viresh: Split the patch into two ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/opp/core.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 9d7fb45b1786d..f2f32786ee451 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -893,8 +893,10 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 		 * have OPP table for the device, while others don't and
 		 * opp_set_rate() just needs to behave like clk_set_rate().
 		 */
-		if (!_get_opp_count(opp_table))
-			return 0;
+		if (!_get_opp_count(opp_table)) {
+			ret = 0;
+			goto put_opp_table;
+		}
 
 		if (!opp_table->required_opp_tables && !opp_table->regulators &&
 		    !opp_table->paths) {
-- 
GitLab


From d4ec88d205583ac4f9482cf3e89128589bd881d2 Mon Sep 17 00:00:00 2001
From: Stephen Boyd <swboyd@chromium.org>
Date: Tue, 11 Aug 2020 14:28:36 -0700
Subject: [PATCH 0110/1341] opp: Put opp table in dev_pm_opp_set_rate() if
 _set_opp_bw() fails

We get the opp_table pointer at the top of the function and so we should
put the pointer at the end of the function like all other exit paths
from this function do.

Cc: v5.8+ <stable@vger.kernel.org> # v5.8+
Fixes: b00e667a6d8b ("opp: Remove bandwidth votes when target_freq is zero")
Reviewed-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
[ Viresh: Split the patch into two ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/opp/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index f2f32786ee451..bdb028c7793df 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -907,7 +907,7 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 
 		ret = _set_opp_bw(opp_table, NULL, dev, true);
 		if (ret)
-			return ret;
+			goto put_opp_table;
 
 		if (opp_table->regulator_enabled) {
 			regulator_disable(opp_table->regulators[0]);
-- 
GitLab


From 5b2aa9f918f6837ae943557f8cec02c34fcf80e7 Mon Sep 17 00:00:00 2001
From: Peter Ujfalusi <peter.ujfalusi@ti.com>
Date: Thu, 6 Aug 2020 13:49:28 +0300
Subject: [PATCH 0111/1341] dmaengine: of-dma: Fix of_dma_router_xlate's
 of_dma_xlate handling

of_dma_xlate callback can return ERR_PTR as well NULL in case of failure.

If error code is returned (not NULL) then the route should be released and
the router should not be registered for the channel.

Fixes: 56f13c0d9524c ("dmaengine: of_dma: Support for DMA routers")
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200806104928.25975-1-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/of-dma.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/of-dma.c b/drivers/dma/of-dma.c
index 863f2aaf5c8f7..8a4f608904b98 100644
--- a/drivers/dma/of-dma.c
+++ b/drivers/dma/of-dma.c
@@ -71,12 +71,12 @@ static struct dma_chan *of_dma_router_xlate(struct of_phandle_args *dma_spec,
 		return NULL;
 
 	chan = ofdma_target->of_dma_xlate(&dma_spec_target, ofdma_target);
-	if (chan) {
-		chan->router = ofdma->dma_router;
-		chan->route_data = route_data;
-	} else {
+	if (IS_ERR_OR_NULL(chan)) {
 		ofdma->dma_router->route_free(ofdma->dma_router->dev,
 					      route_data);
+	} else {
+		chan->router = ofdma->dma_router;
+		chan->route_data = route_data;
 	}
 
 	/*
-- 
GitLab


From 74a2a7de81a2ef20732ec02087314e92692a7a1b Mon Sep 17 00:00:00 2001
From: Hector Martin <marcan@marcan.st>
Date: Sun, 16 Aug 2020 17:44:31 +0900
Subject: [PATCH 0112/1341] ALSA: usb-audio: Update documentation comment for
 MS2109 quirk

As the recent fix addressed the channel swap problem more properly,
update the comment as well.

Fixes: 1b7ecc241a67 ("ALSA: usb-audio: work around streaming quirk for MacroSilicon MS2109")
Signed-off-by: Hector Martin <marcan@marcan.st>
Link: https://lore.kernel.org/r/20200816084431.102151-1-marcan@marcan.st
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/quirks-table.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index e6202608e043f..f4fb002e3ef42 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -3744,8 +3744,8 @@ ALC1220_VB_DESKTOP(0x26ce, 0x0a01), /* Asrock TRX40 Creator */
  * they pretend to be 96kHz mono as a workaround for stereo being broken
  * by that...
  *
- * They also have swapped L-R channels, but that's for userspace to deal
- * with.
+ * They also have an issue with initial stream alignment that causes the
+ * channels to be swapped and out of phase, which is dealt with in quirks.c.
  */
 {
 	.match_flags = USB_DEVICE_ID_MATCH_DEVICE |
-- 
GitLab


From 7828a3ef8646fb2e69ed45616c8453a037ca7867 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Thu, 6 Aug 2020 10:57:45 +0100
Subject: [PATCH 0113/1341] irqchip: Fix probing deferal when using
 IRQCHIP_PLATFORM_DRIVER helpers

When probing an interrupt controller that is behind a parent,
we try to check whether the parent domain is available as
an indication that we can actually try to probe.

Unfortunately, we are checking this with the firmware node of
the about to be probed device, not the parent. This is obviously
bound to fail.

Instead, use the parent node.

Fixes: f8410e626569 ("irqchip: Add IRQCHIP_PLATFORM_DRIVER_BEGIN/END and IRQCHIP_MATCH helper macros")
Reported-by: John Stultz <john.stultz@linaro.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 drivers/irqchip/irqchip.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irqchip.c b/drivers/irqchip/irqchip.c
index 1bb0e36c2bf3d..d2341153e1814 100644
--- a/drivers/irqchip/irqchip.c
+++ b/drivers/irqchip/irqchip.c
@@ -52,7 +52,7 @@ int platform_irqchip_probe(struct platform_device *pdev)
 	 * interrupt controller. The actual initialization callback of this
 	 * interrupt controller can check for specific domains as necessary.
 	 */
-	if (par_np && !irq_find_matching_host(np, DOMAIN_BUS_ANY))
+	if (par_np && !irq_find_matching_host(par_np, DOMAIN_BUS_ANY))
 		return -EPROBE_DEFER;
 
 	return irq_init_cb(np, par_np);
-- 
GitLab


From 23dc958689449be85e39351a8c809c3d344b155b Mon Sep 17 00:00:00 2001
From: Mike Pozulp <pozulp.kernel@gmail.com>
Date: Sun, 16 Aug 2020 21:32:17 -0700
Subject: [PATCH 0114/1341] ALSA: hda/realtek: Add model
 alc298-samsung-headphone

The very quiet and distorted headphone output bug that afflicted my
Samsung Notebook 9 is appearing in many other Samsung laptops. Expose
the quirk which fixed my laptop as a model so other users can try it.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207423
Signed-off-by: Mike Pozulp <pozulp.kernel@gmail.com>
Link: https://lore.kernel.org/r/20200817043219.458889-1-pozulp.kernel@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_realtek.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 167b6fd6842d9..5722f0bd3b319 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -7956,6 +7956,7 @@ static const struct hda_model_fixup alc269_fixup_models[] = {
 	{.id = ALC299_FIXUP_PREDATOR_SPK, .name = "predator-spk"},
 	{.id = ALC298_FIXUP_HUAWEI_MBX_STEREO, .name = "huawei-mbx-stereo"},
 	{.id = ALC256_FIXUP_MEDION_HEADSET_NO_PRESENCE, .name = "alc256-medion-headset"},
+	{.id = ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET, .name = "alc298-samsung-headphone"},
 	{}
 };
 #define ALC225_STANDARD_PINS \
-- 
GitLab


From 857ce8c1c504e25d08724a86df4e64bf6f282323 Mon Sep 17 00:00:00 2001
From: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Date: Mon, 27 Jul 2020 15:21:59 +0200
Subject: [PATCH 0115/1341] HID: cougar: Constify cougar_id_table

cougar_id_table[] is not changed and can be made const to allow the
compiler to put it in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-cougar.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/hid-cougar.c b/drivers/hid/hid-cougar.c
index 4ff3bc1d25e23..28d671c5e0cac 100644
--- a/drivers/hid/hid-cougar.c
+++ b/drivers/hid/hid-cougar.c
@@ -321,7 +321,7 @@ static const struct kernel_param_ops cougar_g6_is_space_ops = {
 };
 module_param_cb(g6_is_space, &cougar_g6_is_space_ops, &g6_is_space, 0644);
 
-static struct hid_device_id cougar_id_table[] = {
+static const struct hid_device_id cougar_id_table[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SOLID_YEAR,
 			 USB_DEVICE_ID_COUGAR_500K_GAMING_KEYBOARD) },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SOLID_YEAR,
-- 
GitLab


From d71c8008e194bf947fe260110c8553ff91469294 Mon Sep 17 00:00:00 2001
From: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Date: Mon, 27 Jul 2020 15:22:00 +0200
Subject: [PATCH 0116/1341] HID: macally: Constify macally_id_table

macally_id_table is not modified and can be made const to allow the
compiler to put it in read-only memory.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-macally.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/hid-macally.c b/drivers/hid/hid-macally.c
index 9a4fc7dffb14d..aea46e5220082 100644
--- a/drivers/hid/hid-macally.c
+++ b/drivers/hid/hid-macally.c
@@ -29,7 +29,7 @@ static __u8 *macally_report_fixup(struct hid_device *hdev, __u8 *rdesc,
 	return rdesc;
 }
 
-static struct hid_device_id macally_id_table[] = {
+static const struct hid_device_id macally_id_table[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SOLID_YEAR,
 			 USB_DEVICE_ID_MACALLY_IKEY_KEYBOARD) },
 	{ }
-- 
GitLab


From eef4016243e94c438f177ca8226876eb873b9c75 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 11 Aug 2020 15:39:58 +0200
Subject: [PATCH 0117/1341] HID: i2c-hid: Always sleep 60ms after
 I2C_HID_PWR_ON commands

Before this commit i2c_hid_parse() consists of the following steps:

1. Send power on cmd
2. usleep_range(1000, 5000)
3. Send reset cmd
4. Wait for reset to complete (device interrupt, or msleep(100))
5. Send power on cmd
6. Try to read HID descriptor

Notice how there is an usleep_range(1000, 5000) after the first power-on
command, but not after the second power-on command.

Testing has shown that at least on the BMAX Y13 laptop's i2c-hid touchpad,
not having a delay after the second power-on command causes the HID
descriptor to read as all zeros.

In case we hit this on other devices too, the descriptor being all zeros
can be recognized by the following message being logged many, many times:

hid-generic 0018:0911:5288.0002: unknown main item tag 0x0

At the same time as the BMAX Y13's touchpad issue was debugged,
Kai-Heng was working on debugging some issues with Goodix i2c-hid
touchpads. It turns out that these need a delay after a PWR_ON command
too, otherwise they stop working after a suspend/resume cycle.
According to Goodix a delay of minimal 60ms is needed.

Having multiple cases where we need a delay after sending the power-on
command, seems to indicate that we should always sleep after the power-on
command.

This commit fixes the mentioned issues by moving the existing 1ms sleep to
the i2c_hid_set_power() function and changing it to a 60ms sleep.

Cc: stable@vger.kernel.org
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208247
Reported-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Reported-and-tested-by: Andrea Borgia <andrea@borgia.bo.it>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/i2c-hid/i2c-hid-core.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 294c84e136d72..dbd04492825d4 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -420,6 +420,19 @@ static int i2c_hid_set_power(struct i2c_client *client, int power_state)
 		dev_err(&client->dev, "failed to change power setting.\n");
 
 set_pwr_exit:
+
+	/*
+	 * The HID over I2C specification states that if a DEVICE needs time
+	 * after the PWR_ON request, it should utilise CLOCK stretching.
+	 * However, it has been observered that the Windows driver provides a
+	 * 1ms sleep between the PWR_ON and RESET requests.
+	 * According to Goodix Windows even waits 60 ms after (other?)
+	 * PWR_ON requests. Testing has confirmed that several devices
+	 * will not work properly without a delay after a PWR_ON request.
+	 */
+	if (!ret && power_state == I2C_HID_PWR_ON)
+		msleep(60);
+
 	return ret;
 }
 
@@ -441,15 +454,6 @@ static int i2c_hid_hwreset(struct i2c_client *client)
 	if (ret)
 		goto out_unlock;
 
-	/*
-	 * The HID over I2C specification states that if a DEVICE needs time
-	 * after the PWR_ON request, it should utilise CLOCK stretching.
-	 * However, it has been observered that the Windows driver provides a
-	 * 1ms sleep between the PWR_ON and RESET requests and that some devices
-	 * rely on this.
-	 */
-	usleep_range(1000, 5000);
-
 	i2c_hid_dbg(ihid, "resetting...\n");
 
 	ret = i2c_hid_command(client, &hid_reset_cmd, NULL, 0);
-- 
GitLab


From b4b6fb8de8dcb756c78ef7203cb9d00a42185e26 Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Mon, 29 Jun 2020 15:00:54 +0300
Subject: [PATCH 0118/1341] arm64: dts: zynqmp: Add GTR transceivers

Add a DT node for the PS-GTR transceivers.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/20200629120054.29338-4-laurent.pinchart@ideasonboard.com
---
 arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
index 9174ddc76bdc3..a0aad47b0ffc4 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
+++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
@@ -13,6 +13,7 @@
  */
 
 #include <dt-bindings/power/xlnx-zynqmp-power.h>
+#include <dt-bindings/reset/xlnx-zynqmp-resets.h>
 
 / {
 	compatible = "xlnx,zynqmp";
@@ -558,6 +559,15 @@ pcie_intc: legacy-interrupt-controller {
 			};
 		};
 
+		psgtr: phy@fd400000 {
+			compatible = "xlnx,zynqmp-psgtr-v1.1";
+			status = "disabled";
+			reg = <0x0 0xfd400000 0x0 0x40000>,
+			      <0x0 0xfd3d0000 0x0 0x1000>;
+			reg-names = "serdes", "siou";
+			#phy-cells = <4>;
+		};
+
 		rtc: rtc@ffa60000 {
 			compatible = "xlnx,zynqmp-rtc";
 			status = "disabled";
-- 
GitLab


From 8d53ecfbf23135381d2ebbd1b261a7c7f18a7294 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Mon, 29 Jun 2020 10:17:44 +0200
Subject: [PATCH 0119/1341] arm64: dts: xilinx: Align IOMMU nodename with
 dtschema

Fix dtschema validator warnings like:
    smmu@fd800000: $nodename:0: 'smmu@fd800000' does not match '^iommu@[0-9a-f]*'

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200629081744.13916-1-krzk@kernel.org
---
 arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
index a0aad47b0ffc4..3ec99f13c259e 100644
--- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
+++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
@@ -611,7 +611,7 @@ sdhci1: mmc@ff170000 {
 			power-domains = <&zynqmp_firmware PD_SD_1>;
 		};
 
-		smmu: smmu@fd800000 {
+		smmu: iommu@fd800000 {
 			compatible = "arm,mmu-500";
 			reg = <0x0 0xfd800000 0x0 0x20000>;
 			status = "disabled";
-- 
GitLab


From 627a49975bdc3220f360a8237603a6344ee6a588 Mon Sep 17 00:00:00 2001
From: Sebastian Parschauer <s.parschauer@gmx.de>
Date: Mon, 17 Aug 2020 10:36:28 +0200
Subject: [PATCH 0120/1341] HID: quirks: Always poll three more Lenovo PixArt
 mice

The PixArt OEM mice are known for disconnecting every minute in
runlevel 1 or 3 if they are not always polled. One Lenovo PixArt
mouse is already fixed. Got two references for 17ef:602e and three
references for 17ef:6019 misbehaving like this. Got one direct bug
report for 17ef:6093 from Wyatt Ward (wyatt8740). So add
HID_QUIRK_ALWAYS_POLL for all of them.

Link: https://github.com/sriemer/fix-linux-mouse issue 22
Signed-off-by: Sebastian Parschauer <s.parschauer@gmx.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-ids.h    | 3 +++
 drivers/hid/hid-quirks.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 6221888aae99f..a8e3b2796be80 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -728,6 +728,9 @@
 #define USB_DEVICE_ID_LENOVO_TPPRODOCK	0x6067
 #define USB_DEVICE_ID_LENOVO_X1_COVER	0x6085
 #define USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_608D	0x608d
+#define USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_6019	0x6019
+#define USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_602E	0x602e
+#define USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_6093	0x6093
 
 #define USB_VENDOR_ID_LG		0x1fd2
 #define USB_DEVICE_ID_LG_MULTITOUCH	0x0064
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index c242150d35a3a..a65aef6a322fb 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -105,6 +105,9 @@ static const struct hid_device_id hid_quirks[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_KYE_EASYPEN_M406XE), HID_QUIRK_MULTI_INPUT },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_KYE, USB_DEVICE_ID_PIXART_USB_OPTICAL_MOUSE_ID2), HID_QUIRK_ALWAYS_POLL },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_608D), HID_QUIRK_ALWAYS_POLL },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_6019), HID_QUIRK_ALWAYS_POLL },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_602E), HID_QUIRK_ALWAYS_POLL },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_PIXART_USB_MOUSE_6093), HID_QUIRK_ALWAYS_POLL },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_C007), HID_QUIRK_ALWAYS_POLL },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_C077), HID_QUIRK_ALWAYS_POLL },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_LOGITECH, USB_DEVICE_ID_LOGITECH_KEYBOARD_G710_PLUS), HID_QUIRK_NOGET },
-- 
GitLab


From 25a097f5204675550afb879ee18238ca917cba7a Mon Sep 17 00:00:00 2001
From: Peilin Ye <yepeilin.cs@gmail.com>
Date: Wed, 29 Jul 2020 07:37:12 -0400
Subject: [PATCH 0121/1341] HID: hiddev: Fix slab-out-of-bounds write in
 hiddev_ioctl_usage()

`uref->usage_index` is not always being properly checked, causing
hiddev_ioctl_usage() to go out of bounds under some cases. Fix it.

Reported-by: syzbot+34ee1b45d88571c2fa8b@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?id=f2aebe90b8c56806b050a20b36f51ed6acabe802
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/usbhid/hiddev.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index 4140dea693e90..4f97e6c120595 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -519,12 +519,16 @@ static noinline int hiddev_ioctl_usage(struct hiddev *hiddev, unsigned int cmd,
 
 		switch (cmd) {
 		case HIDIOCGUSAGE:
+			if (uref->usage_index >= field->report_count)
+				goto inval;
 			uref->value = field->value[uref->usage_index];
 			if (copy_to_user(user_arg, uref, sizeof(*uref)))
 				goto fault;
 			goto goodreturn;
 
 		case HIDIOCSUSAGE:
+			if (uref->usage_index >= field->report_count)
+				goto inval;
 			field->value[uref->usage_index] = uref->value;
 			goto goodreturn;
 
-- 
GitLab


From 07c8434150f4eb0b65cae288721c8af1080fde17 Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Fri, 14 Aug 2020 07:55:01 +0200
Subject: [PATCH 0122/1341] usb: gadget: f_tcm: Fix some resource leaks in some
 error paths

If a memory allocation fails within a 'usb_ep_alloc_request()' call, the
already allocated memory must be released.

Fix a mix-up in the code and free the correct requests.

Fixes: c52661d60f63 ("usb-gadget: Initial merge of target module for UASP + BOT")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
---
 drivers/usb/gadget/function/f_tcm.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c
index d94b814328c8b..184165e27908e 100644
--- a/drivers/usb/gadget/function/f_tcm.c
+++ b/drivers/usb/gadget/function/f_tcm.c
@@ -753,12 +753,13 @@ static int uasp_alloc_stream_res(struct f_uas *fu, struct uas_stream *stream)
 		goto err_sts;
 
 	return 0;
+
 err_sts:
-	usb_ep_free_request(fu->ep_status, stream->req_status);
-	stream->req_status = NULL;
-err_out:
 	usb_ep_free_request(fu->ep_out, stream->req_out);
 	stream->req_out = NULL;
+err_out:
+	usb_ep_free_request(fu->ep_in, stream->req_in);
+	stream->req_in = NULL;
 out:
 	return -ENOMEM;
 }
-- 
GitLab


From 433c1ca0d441ee0b88fdd83c84ee6d6d43080dcd Mon Sep 17 00:00:00 2001
From: Jiaxun Yang <jiaxun.yang@flygoat.com>
Date: Sat, 8 Aug 2020 20:32:27 +0800
Subject: [PATCH 0123/1341] MIPS: Loongson64: Do not override watch and ejtag
 feature

Do not override ejtag feature to 0 as Loongson 3A1000+ do have ejtag.
For watch, as KVM emulated CPU doesn't have watch feature, we should
not enable it unconditionally.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h b/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
index b6e9c99b85a52..eb181224eb4c4 100644
--- a/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
@@ -26,7 +26,6 @@
 #define cpu_has_counter		1
 #define cpu_has_dc_aliases	(PAGE_SIZE < 0x4000)
 #define cpu_has_divec		0
-#define cpu_has_ejtag		0
 #define cpu_has_inclusive_pcaches	1
 #define cpu_has_llsc		1
 #define cpu_has_mcheck		0
@@ -42,7 +41,6 @@
 #define cpu_has_veic		0
 #define cpu_has_vint		0
 #define cpu_has_vtag_icache	0
-#define cpu_has_watch		1
 #define cpu_has_wsbh		1
 #define cpu_has_ic_fills_f_dc	1
 #define cpu_hwrena_impl_bits	0xc0000000
-- 
GitLab


From 0b8eb2ee9da1e8c9b8082f404f3948aa82a057b2 Mon Sep 17 00:00:00 2001
From: Vineeth Vijayan <vneethv@linux.ibm.com>
Date: Thu, 18 Jun 2020 16:42:45 +0200
Subject: [PATCH 0124/1341] s390/cio: add cond_resched() in the
 slow_eval_known_fn() loop

The scanning through subchannels during the time of an event could
take significant amount of time in case of platforms with lots of
known subchannels. This might result in higher scheduling latencies
for other tasks especially on systems with a single CPU. Add
cond_resched() call, as the loop in slow_eval_known_fn() can be
executed for a longer duration.

Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 drivers/s390/cio/css.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 94edbb33d0d1f..aca022239b333 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -677,6 +677,11 @@ static int slow_eval_known_fn(struct subchannel *sch, void *data)
 		rc = css_evaluate_known_subchannel(sch, 1);
 		if (rc == -EAGAIN)
 			css_schedule_eval(sch->schid);
+		/*
+		 * The loop might take long time for platforms with lots of
+		 * known devices. Allow scheduling here.
+		 */
+		cond_resched();
 	}
 	return 0;
 }
-- 
GitLab


From b76fee1bc56c31a9d2a49592810eba30cc06d61a Mon Sep 17 00:00:00 2001
From: Niklas Schnelle <schnelle@linux.ibm.com>
Date: Tue, 4 Aug 2020 13:01:26 +0200
Subject: [PATCH 0125/1341] s390/pci: ignore stale configuration request event

A configuration request event may be stale, that is the event
may reference a zdev which was already configured.
This can happen when a hotplug happens during boot such that
the device is discovered and configured in the initial clp_list_pci(),
then after initialization we enable events and process
the original configuration request which additionally still contains
the old disabled function handle leading to a failure during device
enablement and subsequent I/O lockout.

Fix this by restoring the check that the device to be configured is in
standby which was removed in commit f606b3ef47c9 ("s390/pci: adapt events
for zbus").

This check does not need serialization as we only enable the events after
zPCI has fully initialized, which includes the initial clp_list_pci(),
rescan only does updates and events are serialized with respect to each
other.

Fixes: f606b3ef47c9 ("s390/pci: adapt events for zbus")
Cc: <stable@vger.kernel.org> # 5.8
Reported-by: Shalini Chellathurai Saroja <shalini@linux.ibm.com>
Tested-by: Shalini Chellathurai Saroja <shalini@linux.ibm.com>
Acked-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/pci/pci_event.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index fdebd286f4023..4602068c75483 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -92,6 +92,9 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
 			ret = clp_add_pci_device(ccdf->fid, ccdf->fh, 1);
 			break;
 		}
+		/* the configuration request may be stale */
+		if (zdev->state != ZPCI_FN_STATE_STANDBY)
+			break;
 		zdev->fh = ccdf->fh;
 		zdev->state = ZPCI_FN_STATE_CONFIGURED;
 		ret = zpci_enable_device(zdev);
-- 
GitLab


From 9eaba29c7985236e16468f4e6a49cc18cf01443e Mon Sep 17 00:00:00 2001
From: Heiko Carstens <hca@linux.ibm.com>
Date: Wed, 12 Aug 2020 18:55:41 +0200
Subject: [PATCH 0126/1341] s390/runtime_instrumentation: fix storage key
 handling

The key member of the runtime instrumentation control block contains
only the access key, not the complete storage key. Therefore the value
must be shifted by four bits.
Note: this is only relevant for debugging purposes in case somebody
compiles a kernel with a default storage access key set to a value not
equal to zero.

Fixes: e4b8b3f33fca ("s390: add support for runtime instrumentation")
Reported-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/kernel/runtime_instr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/kernel/runtime_instr.c b/arch/s390/kernel/runtime_instr.c
index 125c7f6e87150..1788a5454b6fc 100644
--- a/arch/s390/kernel/runtime_instr.c
+++ b/arch/s390/kernel/runtime_instr.c
@@ -57,7 +57,7 @@ static void init_runtime_instr_cb(struct runtime_instr_cb *cb)
 	cb->k = 1;
 	cb->ps = 1;
 	cb->pc = 1;
-	cb->key = PAGE_DEFAULT_KEY;
+	cb->key = PAGE_DEFAULT_KEY >> 4;
 	cb->v = 1;
 }
 
-- 
GitLab


From fd78c59446b8d050ecf3e0897c5a486c7de7c595 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <hca@linux.ibm.com>
Date: Wed, 12 Aug 2020 18:56:28 +0200
Subject: [PATCH 0127/1341] s390/ptrace: fix storage key handling

The key member of the runtime instrumentation control block contains
only the access key, not the complete storage key. Therefore the value
must be shifted by four bits. Since existing user space does not
necessarily query and set the access key correctly, just ignore the
user space provided key and use the correct one.
Note: this is only relevant for debugging purposes in case somebody
compiles a kernel with a default storage access key set to a value not
equal to zero.

Fixes: 262832bc5acd ("s390/ptrace: add runtime instrumention register get/set")
Reported-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/kernel/ptrace.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c
index 11d2f7d05f919..a76dd27fb2e81 100644
--- a/arch/s390/kernel/ptrace.c
+++ b/arch/s390/kernel/ptrace.c
@@ -1268,7 +1268,6 @@ static bool is_ri_cb_valid(struct runtime_instr_cb *cb)
 		cb->pc == 1 &&
 		cb->qc == 0 &&
 		cb->reserved2 == 0 &&
-		cb->key == PAGE_DEFAULT_KEY &&
 		cb->reserved3 == 0 &&
 		cb->reserved4 == 0 &&
 		cb->reserved5 == 0 &&
@@ -1330,7 +1329,11 @@ static int s390_runtime_instr_set(struct task_struct *target,
 		kfree(data);
 		return -EINVAL;
 	}
-
+	/*
+	 * Override access key in any case, since user space should
+	 * not be able to set it, nor should it care about it.
+	 */
+	ri_cb.key = PAGE_DEFAULT_KEY >> 4;
 	preempt_disable();
 	if (!target->thread.ri_cb)
 		target->thread.ri_cb = data;
-- 
GitLab


From 3cddb79afc60bcdb5fd9dd7a1c64a8d03bdd460f Mon Sep 17 00:00:00 2001
From: Niklas Schnelle <schnelle@linux.ibm.com>
Date: Mon, 3 Aug 2020 09:33:29 +0200
Subject: [PATCH 0128/1341] s390/pci: fix zpci_bus_link_virtfn()

We were missing the pci_dev_put() for candidate PFs.  Furhtermore in
discussion with upstream it turns out that somewhat counterintuitively
some common code, in particular the vfio-pci driver, assumes that
pdev->is_virtfn always implies that pdev->physfn is set, i.e. that VFs
are always linked.
While POWER does seem to set pdev->is_virtfn even for unlinked functions
(see comments in arch/powerpc/kernel/eeh.c:eeh_debugfs_break_device())
for now just be safe and only set pdev->is_virtfn on linking.
Also make sure that we only search for parent PFs if the zbus is
multifunction and we thus know the devfn values supplied by firmware
come from the RID.

Fixes: e5794cf1a270 ("s390/pci: create links between PFs and VFs")
Cc: <stable@vger.kernel.org> # 5.8
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/pci/pci_bus.c | 25 +++++++++++++++----------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/arch/s390/pci/pci_bus.c b/arch/s390/pci/pci_bus.c
index 642a993846889..423af8b1da7b9 100644
--- a/arch/s390/pci/pci_bus.c
+++ b/arch/s390/pci/pci_bus.c
@@ -132,13 +132,14 @@ static int zpci_bus_link_virtfn(struct pci_dev *pdev,
 {
 	int rc;
 
-	virtfn->physfn = pci_dev_get(pdev);
 	rc = pci_iov_sysfs_link(pdev, virtfn, vfid);
-	if (rc) {
-		pci_dev_put(pdev);
-		virtfn->physfn = NULL;
+	if (rc)
 		return rc;
-	}
+
+	virtfn->is_virtfn = 1;
+	virtfn->multifunction = 0;
+	virtfn->physfn = pci_dev_get(pdev);
+
 	return 0;
 }
 
@@ -151,9 +152,9 @@ static int zpci_bus_setup_virtfn(struct zpci_bus *zbus,
 	int vfid = vfn - 1; /* Linux' vfid's start at 0 vfn at 1*/
 	int rc = 0;
 
-	virtfn->is_virtfn = 1;
-	virtfn->multifunction = 0;
-	WARN_ON(vfid < 0);
+	if (!zbus->multifunction)
+		return 0;
+
 	/* If the parent PF for the given VF is also configured in the
 	 * instance, it must be on the same zbus.
 	 * We can then identify the parent PF by checking what
@@ -165,11 +166,17 @@ static int zpci_bus_setup_virtfn(struct zpci_bus *zbus,
 		zdev = zbus->function[i];
 		if (zdev && zdev->is_physfn) {
 			pdev = pci_get_slot(zbus->bus, zdev->devfn);
+			if (!pdev)
+				continue;
 			cand_devfn = pci_iov_virtfn_devfn(pdev, vfid);
 			if (cand_devfn == virtfn->devfn) {
 				rc = zpci_bus_link_virtfn(pdev, virtfn, vfid);
+				/* balance pci_get_slot() */
+				pci_dev_put(pdev);
 				break;
 			}
+			/* balance pci_get_slot() */
+			pci_dev_put(pdev);
 		}
 	}
 	return rc;
@@ -178,8 +185,6 @@ static int zpci_bus_setup_virtfn(struct zpci_bus *zbus,
 static inline int zpci_bus_setup_virtfn(struct zpci_bus *zbus,
 		struct pci_dev *virtfn, int vfn)
 {
-	virtfn->is_virtfn = 1;
-	virtfn->multifunction = 0;
 	return 0;
 }
 #endif
-- 
GitLab


From 2f0230b2f2d5fd287a85583eefb5aed35b6fe510 Mon Sep 17 00:00:00 2001
From: Niklas Schnelle <schnelle@linux.ibm.com>
Date: Mon, 3 Aug 2020 17:46:32 +0200
Subject: [PATCH 0129/1341] s390/pci: re-introduce zpci_remove_device()

For fixing the PF to VF link removal we need to perform some action on
every removal of a zdev from the common PCI subsystem.
So in preparation re-introduce zpci_remove_device() and use that instead
of directly calling the common code functions. This  was actually still
declared from earlier code but no longer implemented.

Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/pci/pci.c                | 19 ++++++++++++-------
 arch/s390/pci/pci_event.c          |  4 ++--
 drivers/pci/hotplug/s390_pci_hpc.c | 12 +++++-------
 3 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 3902c9f6f2d63..6e57ff885f8ad 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -672,6 +672,16 @@ int zpci_disable_device(struct zpci_dev *zdev)
 }
 EXPORT_SYMBOL_GPL(zpci_disable_device);
 
+void zpci_remove_device(struct zpci_dev *zdev)
+{
+	struct zpci_bus *zbus = zdev->zbus;
+	struct pci_dev *pdev;
+
+	pdev = pci_get_slot(zbus->bus, zdev->devfn);
+	if (pdev)
+		pci_stop_and_remove_bus_device_locked(pdev);
+}
+
 int zpci_create_device(struct zpci_dev *zdev)
 {
 	int rc;
@@ -716,13 +726,8 @@ void zpci_release_device(struct kref *kref)
 {
 	struct zpci_dev *zdev = container_of(kref, struct zpci_dev, kref);
 
-	if (zdev->zbus->bus) {
-		struct pci_dev *pdev;
-
-		pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
-		if (pdev)
-			pci_stop_and_remove_bus_device_locked(pdev);
-	}
+	if (zdev->zbus->bus)
+		zpci_remove_device(zdev);
 
 	switch (zdev->state) {
 	case ZPCI_FN_STATE_ONLINE:
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index 4602068c75483..9a3a291cad432 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -121,7 +121,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
 		if (!zdev)
 			break;
 		if (pdev)
-			pci_stop_and_remove_bus_device_locked(pdev);
+			zpci_remove_device(zdev);
 
 		ret = zpci_disable_device(zdev);
 		if (ret)
@@ -140,7 +140,7 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
 			/* Give the driver a hint that the function is
 			 * already unusable. */
 			pdev->error_state = pci_channel_io_perm_failure;
-			pci_stop_and_remove_bus_device_locked(pdev);
+			zpci_remove_device(zdev);
 		}
 
 		zdev->state = ZPCI_FN_STATE_STANDBY;
diff --git a/drivers/pci/hotplug/s390_pci_hpc.c b/drivers/pci/hotplug/s390_pci_hpc.c
index b59f84918fe06..c9e790c74051f 100644
--- a/drivers/pci/hotplug/s390_pci_hpc.c
+++ b/drivers/pci/hotplug/s390_pci_hpc.c
@@ -83,21 +83,19 @@ static int disable_slot(struct hotplug_slot *hotplug_slot)
 	struct zpci_dev *zdev = container_of(hotplug_slot, struct zpci_dev,
 					     hotplug_slot);
 	struct pci_dev *pdev;
-	struct zpci_bus *zbus = zdev->zbus;
 	int rc;
 
 	if (!zpci_fn_configured(zdev->state))
 		return -EIO;
 
-	pdev = pci_get_slot(zbus->bus, zdev->devfn);
-	if (pdev) {
-		if (pci_num_vf(pdev))
-			return -EBUSY;
-
-		pci_stop_and_remove_bus_device_locked(pdev);
+	pdev = pci_get_slot(zdev->zbus->bus, zdev->devfn);
+	if (pdev && pci_num_vf(pdev)) {
 		pci_dev_put(pdev);
+		return -EBUSY;
 	}
 
+	zpci_remove_device(zdev);
+
 	rc = zpci_disable_device(zdev);
 	if (rc)
 		return rc;
-- 
GitLab


From b97bf44f99155e57088e16974afb1f2d7b5287aa Mon Sep 17 00:00:00 2001
From: Niklas Schnelle <schnelle@linux.ibm.com>
Date: Mon, 3 Aug 2020 17:58:10 +0200
Subject: [PATCH 0130/1341] s390/pci: fix PF/VF linking on hot plug

Currently there are four places in which a PCI function is scanned
and made available to drivers:
 1. In pci_scan_root_bus() as part of the initial zbus
    creation.
 2. In zpci_bus_add_devices() when registering
    a device in configured state on a zbus that has already been
    scanned.
 3. When a function is already known to zPCI (in reserved/standby state)
    and configuration is triggered through firmware by PEC 0x301.
 4. When a device is already known to zPCI (in standby/reserved state)
    and configuration is triggered from within Linux using
    enable_slot().

The PF/VF linking step and setting of pdev->is_virtfn introduced with
commit e5794cf1a270 ("s390/pci: create links between PFs and VFs") was
only triggered for the second case, which is where VFs created through
sriov_numvfs usually land. However unlike some other platforms but like
POWER VFs can be individually enabled/disabled through
/sys/bus/pci/slots.

Fix this by doing VF setup as part of pcibios_bus_add_device() which is
called in all of the above cases.

Finally to remove the PF/VF links call the common code
pci_iov_remove_virtfn() function to remove linked VFs.
This takes care of the necessary sysfs cleanup.

Fixes: e5794cf1a270 ("s390/pci: create links between PFs and VFs")
Cc: <stable@vger.kernel.org> # 5.8: 2f0230b2f2d5: s390/pci: re-introduce zpci_remove_device()
Cc: <stable@vger.kernel.org> # 5.8
Acked-by: Pierre Morel <pmorel@linux.ibm.com>
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/pci/pci.c     |  5 ++++-
 arch/s390/pci/pci_bus.c | 27 +++++++++++++++------------
 arch/s390/pci/pci_bus.h | 13 +++++++++++++
 3 files changed, 32 insertions(+), 13 deletions(-)

diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 6e57ff885f8ad..4b62d6b550246 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -678,8 +678,11 @@ void zpci_remove_device(struct zpci_dev *zdev)
 	struct pci_dev *pdev;
 
 	pdev = pci_get_slot(zbus->bus, zdev->devfn);
-	if (pdev)
+	if (pdev) {
+		if (pdev->is_virtfn)
+			return zpci_remove_virtfn(pdev, zdev->vfn);
 		pci_stop_and_remove_bus_device_locked(pdev);
+	}
 }
 
 int zpci_create_device(struct zpci_dev *zdev)
diff --git a/arch/s390/pci/pci_bus.c b/arch/s390/pci/pci_bus.c
index 423af8b1da7b9..5967f30141563 100644
--- a/arch/s390/pci/pci_bus.c
+++ b/arch/s390/pci/pci_bus.c
@@ -189,6 +189,19 @@ static inline int zpci_bus_setup_virtfn(struct zpci_bus *zbus,
 }
 #endif
 
+void pcibios_bus_add_device(struct pci_dev *pdev)
+{
+	struct zpci_dev *zdev = to_zpci(pdev);
+
+	/*
+	 * With pdev->no_vf_scan the common PCI probing code does not
+	 * perform PF/VF linking.
+	 */
+	if (zdev->vfn)
+		zpci_bus_setup_virtfn(zdev->zbus, pdev, zdev->vfn);
+
+}
+
 static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev)
 {
 	struct pci_bus *bus;
@@ -219,20 +232,10 @@ static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev)
 	}
 
 	pdev = pci_scan_single_device(bus, zdev->devfn);
-	if (pdev) {
-		if (!zdev->is_physfn) {
-			rc = zpci_bus_setup_virtfn(zbus, pdev, zdev->vfn);
-			if (rc)
-				goto failed_with_pdev;
-		}
+	if (pdev)
 		pci_bus_add_device(pdev);
-	}
-	return 0;
 
-failed_with_pdev:
-	pci_stop_and_remove_bus_device(pdev);
-	pci_dev_put(pdev);
-	return rc;
+	return 0;
 }
 
 static void zpci_bus_add_devices(struct zpci_bus *zbus)
diff --git a/arch/s390/pci/pci_bus.h b/arch/s390/pci/pci_bus.h
index 89be3c354b7bc..4972433df4581 100644
--- a/arch/s390/pci/pci_bus.h
+++ b/arch/s390/pci/pci_bus.h
@@ -29,3 +29,16 @@ static inline struct zpci_dev *get_zdev_by_bus(struct pci_bus *bus,
 
 	return (devfn >= ZPCI_FUNCTIONS_PER_BUS) ? NULL : zbus->function[devfn];
 }
+
+#ifdef CONFIG_PCI_IOV
+static inline void zpci_remove_virtfn(struct pci_dev *pdev, int vfn)
+{
+
+	pci_lock_rescan_remove();
+	/* Linux' vfid's start at 0 vfn at 1 */
+	pci_iov_remove_virtfn(pdev->physfn, vfn - 1);
+	pci_unlock_rescan_remove();
+}
+#else /* CONFIG_PCI_IOV */
+static inline void zpci_remove_virtfn(struct pci_dev *pdev, int vfn) {}
+#endif /* CONFIG_PCI_IOV */
-- 
GitLab


From a58cfdba2039ff2d5758840e97a23a2dedecf1e8 Mon Sep 17 00:00:00 2001
From: Jing Xiangfeng <jingxiangfeng@huawei.com>
Date: Fri, 24 Jul 2020 11:54:30 +0800
Subject: [PATCH 0131/1341] ARM: OMAP2+: Fix an IS_ERR() vs NULL check in
 _get_pwrdm()

The of_clk_get() function returns error pointers, it never returns NULL.

Fixes: 4ea3711aece4 ("ARM: OMAP2+: omap-iommu.c conversion to ti-sysc")
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 arch/arm/mach-omap2/omap-iommu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-omap2/omap-iommu.c b/arch/arm/mach-omap2/omap-iommu.c
index 54aff33e55e6e..bfa5e1b8dba7f 100644
--- a/arch/arm/mach-omap2/omap-iommu.c
+++ b/arch/arm/mach-omap2/omap-iommu.c
@@ -74,7 +74,7 @@ static struct powerdomain *_get_pwrdm(struct device *dev)
 		return pwrdm;
 
 	clk = of_clk_get(dev->of_node->parent, 0);
-	if (!clk) {
+	if (IS_ERR(clk)) {
 		dev_err(dev, "no fck found\n");
 		return NULL;
 	}
-- 
GitLab


From d7dfee67688ac7f2dfd4c3bc70c053ee990c40b5 Mon Sep 17 00:00:00 2001
From: Adam Ford <aford173@gmail.com>
Date: Sat, 8 Aug 2020 21:56:10 -0500
Subject: [PATCH 0132/1341] ARM: dts: logicpd-torpedo-baseboard: Fix broken
 audio

Older versions of U-Boot would pinmux the whole board, but as
the bootloader got updated, it started to only pinmux the pins
it needed, and expected Linux to configure what it needed.

Unfortunately this caused an issue with the audio, because the
mcbsp2 pins were configured in the device tree, they were never
referenced by the driver. When U-Boot stopped muxing the audio
pins, the audio died.

This patch adds the references to the associate the pin controller
with the mcbsp2 driver which makes audio operate again.

Fixes: 739f85bba5ab ("ARM: dts: Move most of logicpd-torpedo-37xx-devkit to logicpd-torpedo-baseboard")

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 arch/arm/boot/dts/logicpd-torpedo-baseboard.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/logicpd-torpedo-baseboard.dtsi b/arch/arm/boot/dts/logicpd-torpedo-baseboard.dtsi
index 381f0e82bb706..b0f6613e6d549 100644
--- a/arch/arm/boot/dts/logicpd-torpedo-baseboard.dtsi
+++ b/arch/arm/boot/dts/logicpd-torpedo-baseboard.dtsi
@@ -81,6 +81,8 @@ &vaux4 {
 };
 
 &mcbsp2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcbsp2_pins>;
 	status = "okay";
 };
 
-- 
GitLab


From 4d26e9a028e3d88223e06fa133c3d55af7ddbceb Mon Sep 17 00:00:00 2001
From: Adam Ford <aford173@gmail.com>
Date: Fri, 14 Aug 2020 07:53:38 -0500
Subject: [PATCH 0133/1341] ARM: dts: logicpd-som-lv-baseboard: Fix broken
 audio

Older versions of U-Boot would pinmux the whole board, but as
the bootloader got updated, it started to only pinmux the pins
it needed, and expected Linux to configure what it needed.

Unfortunately this caused an issue with the audio, because the
mcbsp2 pins were configured in the device tree but never
referenced by the driver. When U-Boot stopped muxing the audio
pins, the audio died.

This patch adds the references to the associate the pin controller
with the mcbsp2 driver which makes audio operate again.

Fixes: 5cb8b0fa55a9 ("ARM: dts: Move most of logicpd-som-lv-37xx-devkit.dts to logicpd-som-lv-baseboard.dtsi")

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 arch/arm/boot/dts/logicpd-som-lv-baseboard.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/boot/dts/logicpd-som-lv-baseboard.dtsi b/arch/arm/boot/dts/logicpd-som-lv-baseboard.dtsi
index 100396f6c2feb..c310c33ca6f3f 100644
--- a/arch/arm/boot/dts/logicpd-som-lv-baseboard.dtsi
+++ b/arch/arm/boot/dts/logicpd-som-lv-baseboard.dtsi
@@ -51,6 +51,8 @@ &vaux4 {
 
 &mcbsp2 {
 	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&mcbsp2_pins>;
 };
 
 &charger {
-- 
GitLab


From 314213c15702f7598c486cf8c94f617719dfe339 Mon Sep 17 00:00:00 2001
From: Sylwester Nawrocki <s.nawrocki@samsung.com>
Date: Tue, 4 Aug 2020 16:10:43 +0200
Subject: [PATCH 0134/1341] ASoC: wm8994: Prevent access to invalid VU register
 bits on WM1811

The ADC2 and DAC2 are not available on WM1811 device. This patch moves
the ADC2, DAC2 VU bitfields to a separate array so we can skip accessing
them and avoid unreadable register access on WM1811.

This allows to get rid of warnings during boot like:
wm8994-codec: ASoC: error at soc_component_read_no_lock on wm8994-codec: -5

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Link: https://lore.kernel.org/r/20200804141043.11425-1-s.nawrocki@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/wm8994.c | 60 ++++++++++++++++++++++++++++-----------
 1 file changed, 44 insertions(+), 16 deletions(-)

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index a84ae879d37e6..038be667c1a61 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -43,10 +43,12 @@
 #define WM8994_NUM_DRC 3
 #define WM8994_NUM_EQ  3
 
-static struct {
+struct wm8994_reg_mask {
 	unsigned int reg;
 	unsigned int mask;
-} wm8994_vu_bits[] = {
+};
+
+static struct wm8994_reg_mask wm8994_vu_bits[] = {
 	{ WM8994_LEFT_LINE_INPUT_1_2_VOLUME, WM8994_IN1_VU },
 	{ WM8994_RIGHT_LINE_INPUT_1_2_VOLUME, WM8994_IN1_VU },
 	{ WM8994_LEFT_LINE_INPUT_3_4_VOLUME, WM8994_IN2_VU },
@@ -60,14 +62,10 @@ static struct {
 
 	{ WM8994_AIF1_DAC1_LEFT_VOLUME, WM8994_AIF1DAC1_VU },
 	{ WM8994_AIF1_DAC1_RIGHT_VOLUME, WM8994_AIF1DAC1_VU },
-	{ WM8994_AIF1_DAC2_LEFT_VOLUME, WM8994_AIF1DAC2_VU },
-	{ WM8994_AIF1_DAC2_RIGHT_VOLUME, WM8994_AIF1DAC2_VU },
 	{ WM8994_AIF2_DAC_LEFT_VOLUME, WM8994_AIF2DAC_VU },
 	{ WM8994_AIF2_DAC_RIGHT_VOLUME, WM8994_AIF2DAC_VU },
 	{ WM8994_AIF1_ADC1_LEFT_VOLUME, WM8994_AIF1ADC1_VU },
 	{ WM8994_AIF1_ADC1_RIGHT_VOLUME, WM8994_AIF1ADC1_VU },
-	{ WM8994_AIF1_ADC2_LEFT_VOLUME, WM8994_AIF1ADC2_VU },
-	{ WM8994_AIF1_ADC2_RIGHT_VOLUME, WM8994_AIF1ADC2_VU },
 	{ WM8994_AIF2_ADC_LEFT_VOLUME, WM8994_AIF2ADC_VU },
 	{ WM8994_AIF2_ADC_RIGHT_VOLUME, WM8994_AIF1ADC2_VU },
 	{ WM8994_DAC1_LEFT_VOLUME, WM8994_DAC1_VU },
@@ -76,6 +74,14 @@ static struct {
 	{ WM8994_DAC2_RIGHT_VOLUME, WM8994_DAC2_VU },
 };
 
+/* VU bitfields for ADC2, DAC2 not available on WM1811 */
+static struct wm8994_reg_mask wm8994_adc2_dac2_vu_bits[] = {
+	{ WM8994_AIF1_DAC2_LEFT_VOLUME, WM8994_AIF1DAC2_VU },
+	{ WM8994_AIF1_DAC2_RIGHT_VOLUME, WM8994_AIF1DAC2_VU },
+	{ WM8994_AIF1_ADC2_LEFT_VOLUME, WM8994_AIF1ADC2_VU },
+	{ WM8994_AIF1_ADC2_RIGHT_VOLUME, WM8994_AIF1ADC2_VU },
+};
+
 static int wm8994_drc_base[] = {
 	WM8994_AIF1_DRC1_1,
 	WM8994_AIF1_DRC2_1,
@@ -1030,6 +1036,26 @@ static bool wm8994_check_class_w_digital(struct snd_soc_component *component)
 	return true;
 }
 
+static void wm8994_update_vu_bits(struct snd_soc_component *component)
+{
+	struct wm8994_priv *wm8994 = snd_soc_component_get_drvdata(component);
+	struct wm8994 *control = wm8994->wm8994;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(wm8994_vu_bits); i++)
+		snd_soc_component_write(component, wm8994_vu_bits[i].reg,
+					snd_soc_component_read(component,
+						       wm8994_vu_bits[i].reg));
+	if (control->type == WM1811)
+		return;
+
+	for (i = 0; i < ARRAY_SIZE(wm8994_adc2_dac2_vu_bits); i++)
+		snd_soc_component_write(component,
+				wm8994_adc2_dac2_vu_bits[i].reg,
+				snd_soc_component_read(component,
+					wm8994_adc2_dac2_vu_bits[i].reg));
+}
+
 static int aif_mclk_set(struct snd_soc_component *component, int aif, bool enable)
 {
 	struct wm8994_priv *wm8994 = snd_soc_component_get_drvdata(component);
@@ -1076,7 +1102,7 @@ static int aif1clk_ev(struct snd_soc_dapm_widget *w,
 	struct wm8994_priv *wm8994 = snd_soc_component_get_drvdata(component);
 	struct wm8994 *control = wm8994->wm8994;
 	int mask = WM8994_AIF1DAC1L_ENA | WM8994_AIF1DAC1R_ENA;
-	int ret, i;
+	int ret;
 	int dac;
 	int adc;
 	int val;
@@ -1144,10 +1170,7 @@ static int aif1clk_ev(struct snd_soc_dapm_widget *w,
 		break;
 
 	case SND_SOC_DAPM_POST_PMU:
-		for (i = 0; i < ARRAY_SIZE(wm8994_vu_bits); i++)
-			snd_soc_component_write(component, wm8994_vu_bits[i].reg,
-				      snd_soc_component_read(component,
-						   wm8994_vu_bits[i].reg));
+		wm8994_update_vu_bits(component);
 		break;
 
 	case SND_SOC_DAPM_PRE_PMD:
@@ -1181,7 +1204,7 @@ static int aif2clk_ev(struct snd_soc_dapm_widget *w,
 		      struct snd_kcontrol *kcontrol, int event)
 {
 	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
-	int ret, i;
+	int ret;
 	int dac;
 	int adc;
 	int val;
@@ -1237,10 +1260,7 @@ static int aif2clk_ev(struct snd_soc_dapm_widget *w,
 		break;
 
 	case SND_SOC_DAPM_POST_PMU:
-		for (i = 0; i < ARRAY_SIZE(wm8994_vu_bits); i++)
-			snd_soc_component_write(component, wm8994_vu_bits[i].reg,
-				      snd_soc_component_read(component,
-						   wm8994_vu_bits[i].reg));
+		wm8994_update_vu_bits(component);
 		break;
 
 	case SND_SOC_DAPM_PRE_PMD:
@@ -4346,6 +4366,14 @@ static int wm8994_component_probe(struct snd_soc_component *component)
 				    wm8994_vu_bits[i].mask,
 				    wm8994_vu_bits[i].mask);
 
+	if (control->type != WM1811) {
+		for (i = 0; i < ARRAY_SIZE(wm8994_adc2_dac2_vu_bits); i++)
+			snd_soc_component_update_bits(component,
+					wm8994_adc2_dac2_vu_bits[i].reg,
+					wm8994_adc2_dac2_vu_bits[i].mask,
+					wm8994_adc2_dac2_vu_bits[i].mask);
+	}
+
 	/* Set the low bit of the 3D stereo depth so TLV matches */
 	snd_soc_component_update_bits(component, WM8994_AIF1_DAC1_FILTERS_2,
 			    1 << WM8994_AIF1DAC1_3D_GAIN_SHIFT,
-- 
GitLab


From ff69c97ef84c9f7795adb49e9f07c9adcdd0c288 Mon Sep 17 00:00:00 2001
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Date: Tue, 11 Aug 2020 11:34:52 +0100
Subject: [PATCH 0135/1341] ASoC: msm8916-wcd-analog: fix register Interrupt
 offset

For some reason interrupt set and clear register offsets are
not set correctly.
This patch corrects them!

Fixes: 585e881e5b9e ("ASoC: codecs: Add msm8916-wcd analog codec")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20200811103452.20448-1-srinivas.kandagatla@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/msm8916-wcd-analog.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index 4428c62e25cf0..3ddd822240e3a 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -19,8 +19,8 @@
 
 #define CDC_D_REVISION1			(0xf000)
 #define CDC_D_PERPH_SUBTYPE		(0xf005)
-#define CDC_D_INT_EN_SET		(0x015)
-#define CDC_D_INT_EN_CLR		(0x016)
+#define CDC_D_INT_EN_SET		(0xf015)
+#define CDC_D_INT_EN_CLR		(0xf016)
 #define MBHC_SWITCH_INT			BIT(7)
 #define MBHC_MIC_ELECTRICAL_INS_REM_DET	BIT(6)
 #define MBHC_BUTTON_PRESS_DET		BIT(5)
-- 
GitLab


From f082bb59b72039a2326ec1a44496899fb8aa6d0e Mon Sep 17 00:00:00 2001
From: Sylwester Nawrocki <s.nawrocki@samsung.com>
Date: Fri, 31 Jul 2020 19:38:34 +0200
Subject: [PATCH 0136/1341] ASoC: wm8994: Avoid attempts to read unreadable
 registers

The driver supports WM1811, WM8994, WM8958 devices but according to
documentation and the regmap definitions the WM8958_DSP2_* registers
are only available on WM8958. In current code these registers are
being accessed as if they were available on all the three chips.

When starting playback on WM1811 CODEC multiple errors like:
"wm8994-codec wm8994-codec: ASoC: error at soc_component_read_no_lock on wm8994-codec: -5"
can be seen, which is caused by attempts to read an unavailable
WM8958_DSP2_PROGRAM register. The issue has been uncovered by recent
commit "e2329ee ASoC: soc-component: add soc_component_err()".

This patch adds a check in wm8958_aif_ev() callback so the DSP2 handling
is only done for WM8958.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200731173834.23832-1-s.nawrocki@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/wm8958-dsp2.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/soc/codecs/wm8958-dsp2.c b/sound/soc/codecs/wm8958-dsp2.c
index 68a3b48e6b31f..3bce9a14f0f31 100644
--- a/sound/soc/codecs/wm8958-dsp2.c
+++ b/sound/soc/codecs/wm8958-dsp2.c
@@ -412,8 +412,12 @@ int wm8958_aif_ev(struct snd_soc_dapm_widget *w,
 		  struct snd_kcontrol *kcontrol, int event)
 {
 	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+	struct wm8994 *control = dev_get_drvdata(component->dev->parent);
 	int i;
 
+	if (control->type != WM8958)
+		return 0;
+
 	switch (event) {
 	case SND_SOC_DAPM_POST_PMU:
 	case SND_SOC_DAPM_PRE_PMU:
-- 
GitLab


From 062fa09f44f4fb3776a23184d5d296b0c8872eb9 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Thu, 13 Aug 2020 16:41:10 +0800
Subject: [PATCH 0137/1341] ASoC: intel: Fix memleak in sst_media_open

When power_up_sst() fails, stream needs to be freed
just like when try_module_get() fails. However, current
code is returning directly and ends up leaking memory.

Fixes: 0121327c1a68b ("ASoC: Intel: mfld-pcm: add control for powering up/down dsp")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200813084112.26205-1-dinghao.liu@zju.edu.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/intel/atom/sst-mfld-platform-pcm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/soc/intel/atom/sst-mfld-platform-pcm.c b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
index 49b9f18472bce..b1cac7abdc0ab 100644
--- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c
+++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
@@ -331,7 +331,7 @@ static int sst_media_open(struct snd_pcm_substream *substream,
 
 	ret_val = power_up_sst(stream);
 	if (ret_val < 0)
-		return ret_val;
+		goto out_power_up;
 
 	/* Make sure, that the period size is always even */
 	snd_pcm_hw_constraint_step(substream->runtime, 0,
@@ -340,8 +340,9 @@ static int sst_media_open(struct snd_pcm_substream *substream,
 	return snd_pcm_hw_constraint_integer(runtime,
 			 SNDRV_PCM_HW_PARAM_PERIODS);
 out_ops:
-	kfree(stream);
 	mutex_unlock(&sst_lock);
+out_power_up:
+	kfree(stream);
 	return ret_val;
 }
 
-- 
GitLab


From d1db7b80a6c8c5f81db0e80664d29b374750e2c6 Mon Sep 17 00:00:00 2001
From: Adam Ford <aford173@gmail.com>
Date: Fri, 14 Aug 2020 07:24:41 -0500
Subject: [PATCH 0138/1341] ARM: dts: logicpd-som-lv-baseboard: Fix missing
 video

A previous commit removed the panel-dpi driver, which made the
SOM-LV video stop working because it relied on the DPI driver
for setting video timings.  Now that the simple-panel driver is
available in omap2plus, this patch migrates the SOM-LV dev kits
to use a similar panel and remove the manual timing requirements.
A similar patch was already done and applied to the Torpedo family.

Fixes: 8bf4b1621178 ("drm/omap: Remove panel-dpi driver")

Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 .../boot/dts/logicpd-som-lv-baseboard.dtsi    | 27 ++++---------------
 1 file changed, 5 insertions(+), 22 deletions(-)

diff --git a/arch/arm/boot/dts/logicpd-som-lv-baseboard.dtsi b/arch/arm/boot/dts/logicpd-som-lv-baseboard.dtsi
index c310c33ca6f3f..395e05f10d36c 100644
--- a/arch/arm/boot/dts/logicpd-som-lv-baseboard.dtsi
+++ b/arch/arm/boot/dts/logicpd-som-lv-baseboard.dtsi
@@ -104,35 +104,18 @@ video_reg: video_reg {
 		regulator-max-microvolt = <3300000>;
 	};
 
-	lcd0: display@0 {
-		compatible = "panel-dpi";
-		label = "28";
-		status = "okay";
-		/* default-on; */
+	lcd0: display {
+		/* This isn't the exact LCD, but the timings meet spec */
+		compatible = "logicpd,type28";
 		pinctrl-names = "default";
 		pinctrl-0 = <&lcd_enable_pin>;
-		enable-gpios = <&gpio5 27 GPIO_ACTIVE_HIGH>;	/* gpio155, lcd INI */
+		backlight = <&bl>;
+		enable-gpios = <&gpio5 27 GPIO_ACTIVE_HIGH>;
 		port {
 			lcd_in: endpoint {
 				remote-endpoint = <&dpi_out>;
 			};
 		};
-
-		panel-timing {
-			clock-frequency = <9000000>;
-			hactive = <480>;
-			vactive = <272>;
-			hfront-porch = <3>;
-			hback-porch = <2>;
-			hsync-len = <42>;
-			vback-porch = <3>;
-			vfront-porch = <2>;
-			vsync-len = <11>;
-			hsync-active = <1>;
-			vsync-active = <1>;
-			de-active = <1>;
-			pixelclk-active = <0>;
-		};
 	};
 
 	bl: backlight {
-- 
GitLab


From 73a32129f8ccb556704a26b422f54e048bf14bd0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= <mirq-linux@rere.qmqm.pl>
Date: Wed, 12 Aug 2020 03:31:34 +0200
Subject: [PATCH 0139/1341] regulator: push allocation in
 regulator_init_coupling() outside of lock
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Allocating memory with regulator_list_mutex held makes lockdep unhappy
when memory pressure makes the system do fs_reclaim on eg. eMMC using
a regulator. Push the lock inside regulator_init_coupling() after the
allocation.

======================================================
WARNING: possible circular locking dependency detected
5.7.13+ #533 Not tainted
------------------------------------------------------
kswapd0/383 is trying to acquire lock:
cca78ca4 (&sbi->write_io[i][j].io_rwsem){++++}-{3:3}, at: __submit_merged_write_cond+0x104/0x154
but task is already holding lock:
c0e38518 (fs_reclaim){+.+.}-{0:0}, at: __fs_reclaim_acquire+0x0/0x50
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #2 (fs_reclaim){+.+.}-{0:0}:
       fs_reclaim_acquire.part.11+0x40/0x50
       fs_reclaim_acquire+0x24/0x28
       __kmalloc+0x54/0x218
       regulator_register+0x860/0x1584
       dummy_regulator_probe+0x60/0xa8
[...]
other info that might help us debug this:

Chain exists of:
  &sbi->write_io[i][j].io_rwsem --> regulator_list_mutex --> fs_reclaim

Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(fs_reclaim);
                               lock(regulator_list_mutex);
                               lock(fs_reclaim);
  lock(&sbi->write_io[i][j].io_rwsem);
 *** DEADLOCK ***

1 lock held by kswapd0/383:
 #0: c0e38518 (fs_reclaim){+.+.}-{0:0}, at: __fs_reclaim_acquire+0x0/0x50
[...]

Fixes: d8ca7d184b33 ("regulator: core: Introduce API for regulators coupling customization")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1a889cf7f61c6429c9e6b34ddcdde99be77a26b6.1597195321.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/core.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 75ff7c563c5d6..513f95c6f8373 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -5040,7 +5040,10 @@ static int regulator_init_coupling(struct regulator_dev *rdev)
 	if (!of_check_coupling_data(rdev))
 		return -EPERM;
 
+	mutex_lock(&regulator_list_mutex);
 	rdev->coupling_desc.coupler = regulator_find_coupler(rdev);
+	mutex_unlock(&regulator_list_mutex);
+
 	if (IS_ERR(rdev->coupling_desc.coupler)) {
 		err = PTR_ERR(rdev->coupling_desc.coupler);
 		rdev_err(rdev, "failed to get coupler: %d\n", err);
@@ -5248,9 +5251,7 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	if (ret < 0)
 		goto wash;
 
-	mutex_lock(&regulator_list_mutex);
 	ret = regulator_init_coupling(rdev);
-	mutex_unlock(&regulator_list_mutex);
 	if (ret < 0)
 		goto wash;
 
-- 
GitLab


From 467bf30142c64f2eb64e2ac67fa4595126230efd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= <mirq-linux@rere.qmqm.pl>
Date: Wed, 12 Aug 2020 03:31:34 +0200
Subject: [PATCH 0140/1341] regulator: push allocation in
 regulator_ena_gpio_request() out of lock
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Move another allocation out of regulator_list_mutex-protected region, as
reclaim might want to take the same lock.

WARNING: possible circular locking dependency detected
5.7.13+ #534 Not tainted
------------------------------------------------------
kswapd0/383 is trying to acquire lock:
c0e5d920 (regulator_list_mutex){+.+.}-{3:3}, at: regulator_lock_dependent+0x54/0x2c0

but task is already holding lock:
c0e38518 (fs_reclaim){+.+.}-{0:0}, at: __fs_reclaim_acquire+0x0/0x50

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

-> #1 (fs_reclaim){+.+.}-{0:0}:
       fs_reclaim_acquire.part.11+0x40/0x50
       fs_reclaim_acquire+0x24/0x28
       kmem_cache_alloc_trace+0x40/0x1e8
       regulator_register+0x384/0x1630
       devm_regulator_register+0x50/0x84
       reg_fixed_voltage_probe+0x248/0x35c
[...]
other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(fs_reclaim);
                               lock(regulator_list_mutex);
                               lock(fs_reclaim);
  lock(regulator_list_mutex);

 *** DEADLOCK ***
[...]
2 locks held by kswapd0/383:
 #0: c0e38518 (fs_reclaim){+.+.}-{0:0}, at: __fs_reclaim_acquire+0x0/0x50
 #1: cb70e5e0 (hctx->srcu){....}-{0:0}, at: hctx_lock+0x60/0xb8
[...]

Fixes: 541d052d7215 ("regulator: core: Only support passing enable GPIO descriptors")
[this commit only changes context]
Fixes: f8702f9e4aa7 ("regulator: core: Use ww_mutex for regulators locking")
[this is when the regulator_list_mutex was introduced in reclaim locking path]

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://lore.kernel.org/r/41fe6a9670335721b48e8f5195038c3d67a3bf92.1597195321.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/core.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 513f95c6f8373..62fcf1ebbd047 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2230,10 +2230,13 @@ EXPORT_SYMBOL_GPL(regulator_bulk_unregister_supply_alias);
 static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 				const struct regulator_config *config)
 {
-	struct regulator_enable_gpio *pin;
+	struct regulator_enable_gpio *pin, *new_pin;
 	struct gpio_desc *gpiod;
 
 	gpiod = config->ena_gpiod;
+	new_pin = kzalloc(sizeof(*new_pin), GFP_KERNEL);
+
+	mutex_lock(&regulator_list_mutex);
 
 	list_for_each_entry(pin, &regulator_ena_gpio_list, list) {
 		if (pin->gpiod == gpiod) {
@@ -2242,9 +2245,13 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 		}
 	}
 
-	pin = kzalloc(sizeof(struct regulator_enable_gpio), GFP_KERNEL);
-	if (pin == NULL)
+	if (new_pin == NULL) {
+		mutex_unlock(&regulator_list_mutex);
 		return -ENOMEM;
+	}
+
+	pin = new_pin;
+	new_pin = NULL;
 
 	pin->gpiod = gpiod;
 	list_add(&pin->list, &regulator_ena_gpio_list);
@@ -2252,6 +2259,10 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 update_ena_gpio_to_rdev:
 	pin->request_count++;
 	rdev->ena_pin = pin;
+
+	mutex_unlock(&regulator_list_mutex);
+	kfree(new_pin);
+
 	return 0;
 }
 
@@ -5209,9 +5220,7 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	}
 
 	if (config->ena_gpiod) {
-		mutex_lock(&regulator_list_mutex);
 		ret = regulator_ena_gpio_request(rdev, config);
-		mutex_unlock(&regulator_list_mutex);
 		if (ret != 0) {
 			rdev_err(rdev, "Failed to request enable GPIO: %d\n",
 				 ret);
-- 
GitLab


From 87fe29b61f9522a3d7b60a4580851f548558186f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= <mirq-linux@rere.qmqm.pl>
Date: Wed, 12 Aug 2020 03:31:35 +0200
Subject: [PATCH 0141/1341] regulator: push allocations in create_regulator()
 outside of lock
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Move all allocations outside of the regulator_lock()ed section.

======================================================
WARNING: possible circular locking dependency detected
5.7.13+ #535 Not tainted
------------------------------------------------------
f2fs_discard-179:7/702 is trying to acquire lock:
c0e5d920 (regulator_list_mutex){+.+.}-{3:3}, at: regulator_lock_dependent+0x54/0x2c0

but task is already holding lock:
cb95b080 (&dcc->cmd_lock){+.+.}-{3:3}, at: __issue_discard_cmd+0xec/0x5f8

which lock already depends on the new lock.

the existing dependency chain (in reverse order) is:

[...]

-> #3 (fs_reclaim){+.+.}-{0:0}:
       fs_reclaim_acquire.part.11+0x40/0x50
       fs_reclaim_acquire+0x24/0x28
       __kmalloc_track_caller+0x54/0x218
       kstrdup+0x40/0x5c
       create_regulator+0xf4/0x368
       regulator_resolve_supply+0x1a0/0x200
       regulator_register+0x9c8/0x163c

[...]

other info that might help us debug this:

Chain exists of:
  regulator_list_mutex --> &sit_i->sentry_lock --> &dcc->cmd_lock

[...]

Fixes: f8702f9e4aa7 ("regulator: core: Use ww_mutex for regulators locking")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/6eebc99b2474f4ffaa0405b15178ece0e7e4f608.1597195321.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/core.c | 53 +++++++++++++++++++++-------------------
 1 file changed, 28 insertions(+), 25 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 62fcf1ebbd047..64a8c9444dcdc 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1580,44 +1580,53 @@ static struct regulator *create_regulator(struct regulator_dev *rdev,
 					  const char *supply_name)
 {
 	struct regulator *regulator;
-	char buf[REG_STR_SIZE];
-	int err, size;
+	int err;
+
+	if (dev) {
+		char buf[REG_STR_SIZE];
+		int size;
+
+		size = snprintf(buf, REG_STR_SIZE, "%s-%s",
+				dev->kobj.name, supply_name);
+		if (size >= REG_STR_SIZE)
+			return NULL;
+
+		supply_name = kstrdup(buf, GFP_KERNEL);
+		if (supply_name == NULL)
+			return NULL;
+	} else {
+		supply_name = kstrdup_const(supply_name, GFP_KERNEL);
+		if (supply_name == NULL)
+			return NULL;
+	}
 
 	regulator = kzalloc(sizeof(*regulator), GFP_KERNEL);
-	if (regulator == NULL)
+	if (regulator == NULL) {
+		kfree(supply_name);
 		return NULL;
+	}
 
-	regulator_lock(rdev);
 	regulator->rdev = rdev;
+	regulator->supply_name = supply_name;
+
+	regulator_lock(rdev);
 	list_add(&regulator->list, &rdev->consumer_list);
+	regulator_unlock(rdev);
 
 	if (dev) {
 		regulator->dev = dev;
 
 		/* Add a link to the device sysfs entry */
-		size = snprintf(buf, REG_STR_SIZE, "%s-%s",
-				dev->kobj.name, supply_name);
-		if (size >= REG_STR_SIZE)
-			goto overflow_err;
-
-		regulator->supply_name = kstrdup(buf, GFP_KERNEL);
-		if (regulator->supply_name == NULL)
-			goto overflow_err;
-
 		err = sysfs_create_link_nowarn(&rdev->dev.kobj, &dev->kobj,
-					buf);
+					       supply_name);
 		if (err) {
 			rdev_dbg(rdev, "could not add device link %s err %d\n",
 				  dev->kobj.name, err);
 			/* non-fatal */
 		}
-	} else {
-		regulator->supply_name = kstrdup_const(supply_name, GFP_KERNEL);
-		if (regulator->supply_name == NULL)
-			goto overflow_err;
 	}
 
-	regulator->debugfs = debugfs_create_dir(regulator->supply_name,
+	regulator->debugfs = debugfs_create_dir(supply_name,
 						rdev->debugfs);
 	if (!regulator->debugfs) {
 		rdev_dbg(rdev, "Failed to create debugfs directory\n");
@@ -1642,13 +1651,7 @@ static struct regulator *create_regulator(struct regulator_dev *rdev,
 	    _regulator_is_enabled(rdev))
 		regulator->always_on = true;
 
-	regulator_unlock(rdev);
 	return regulator;
-overflow_err:
-	list_del(&regulator->list);
-	kfree(regulator);
-	regulator_unlock(rdev);
-	return NULL;
 }
 
 static int _regulator_get_enable_time(struct regulator_dev *rdev)
-- 
GitLab


From 5c06540165d443c6455123eb48e7f1a9b618ab34 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= <mirq-linux@rere.qmqm.pl>
Date: Wed, 12 Aug 2020 03:31:36 +0200
Subject: [PATCH 0142/1341] regulator: push allocation in
 set_consumer_device_supply() out of lock
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Pull regulator_list_mutex into set_consumer_device_supply() and keep
allocations outside of it. Fourth of the fs_reclaim deadlock case.

Fixes: 45389c47526d ("regulator: core: Add early supply resolution for regulators")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/f0380bdb3d60aeefa9693c4e234d2dcda7e56747.1597195321.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/core.c | 46 +++++++++++++++++++++++-----------------
 1 file changed, 26 insertions(+), 20 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 64a8c9444dcdc..9f4944dad3a19 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1461,7 +1461,7 @@ static int set_consumer_device_supply(struct regulator_dev *rdev,
 				      const char *consumer_dev_name,
 				      const char *supply)
 {
-	struct regulator_map *node;
+	struct regulator_map *node, *new_node;
 	int has_dev;
 
 	if (supply == NULL)
@@ -1472,6 +1472,22 @@ static int set_consumer_device_supply(struct regulator_dev *rdev,
 	else
 		has_dev = 0;
 
+	new_node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL);
+	if (new_node == NULL)
+		return -ENOMEM;
+
+	new_node->regulator = rdev;
+	new_node->supply = supply;
+
+	if (has_dev) {
+		new_node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL);
+		if (new_node->dev_name == NULL) {
+			kfree(new_node);
+			return -ENOMEM;
+		}
+	}
+
+	mutex_lock(&regulator_list_mutex);
 	list_for_each_entry(node, &regulator_map_list, list) {
 		if (node->dev_name && consumer_dev_name) {
 			if (strcmp(node->dev_name, consumer_dev_name) != 0)
@@ -1489,26 +1505,19 @@ static int set_consumer_device_supply(struct regulator_dev *rdev,
 			 node->regulator->desc->name,
 			 supply,
 			 dev_name(&rdev->dev), rdev_get_name(rdev));
-		return -EBUSY;
+		goto fail;
 	}
 
-	node = kzalloc(sizeof(struct regulator_map), GFP_KERNEL);
-	if (node == NULL)
-		return -ENOMEM;
-
-	node->regulator = rdev;
-	node->supply = supply;
-
-	if (has_dev) {
-		node->dev_name = kstrdup(consumer_dev_name, GFP_KERNEL);
-		if (node->dev_name == NULL) {
-			kfree(node);
-			return -ENOMEM;
-		}
-	}
+	list_add(&new_node->list, &regulator_map_list);
+	mutex_unlock(&regulator_list_mutex);
 
-	list_add(&node->list, &regulator_map_list);
 	return 0;
+
+fail:
+	mutex_unlock(&regulator_list_mutex);
+	kfree(new_node->dev_name);
+	kfree(new_node);
+	return -EBUSY;
 }
 
 static void unset_regulator_supplies(struct regulator_dev *rdev)
@@ -5269,19 +5278,16 @@ regulator_register(const struct regulator_desc *regulator_desc,
 
 	/* add consumers devices */
 	if (init_data) {
-		mutex_lock(&regulator_list_mutex);
 		for (i = 0; i < init_data->num_consumer_supplies; i++) {
 			ret = set_consumer_device_supply(rdev,
 				init_data->consumer_supplies[i].dev_name,
 				init_data->consumer_supplies[i].supply);
 			if (ret < 0) {
-				mutex_unlock(&regulator_list_mutex);
 				dev_err(dev, "Failed to set supply %s\n",
 					init_data->consumer_supplies[i].supply);
 				goto unset_supplies;
 			}
 		}
-		mutex_unlock(&regulator_list_mutex);
 	}
 
 	if (!rdev->desc->ops->get_voltage &&
-- 
GitLab


From d3c731564e09b6c2ebefcd1344743a91a237d6dc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= <mirq-linux@rere.qmqm.pl>
Date: Wed, 12 Aug 2020 03:31:36 +0200
Subject: [PATCH 0143/1341] regulator: plug of_node leak in
 regulator_register()'s error path
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

By calling device_initialize() earlier and noting that kfree(NULL) is
ok, we can save a bit of code in error handling and plug of_node leak.
Fixed commit already did part of the work.

Fixes: 9177514ce349 ("regulator: fix memory leak on error path of regulator_register()")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Vladimir Zapolskiy <vz@mleia.com>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/f5035b1b4d40745e66bacd571bbbb5e4644d21a1.1597195321.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/core.c | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 9f4944dad3a19..1561f7555fc6f 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -5167,6 +5167,7 @@ regulator_register(const struct regulator_desc *regulator_desc,
 		ret = -ENOMEM;
 		goto rinse;
 	}
+	device_initialize(&rdev->dev);
 
 	/*
 	 * Duplicate the config so the driver could override it after
@@ -5174,9 +5175,8 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	 */
 	config = kmemdup(cfg, sizeof(*cfg), GFP_KERNEL);
 	if (config == NULL) {
-		kfree(rdev);
 		ret = -ENOMEM;
-		goto rinse;
+		goto clean;
 	}
 
 	init_data = regulator_of_get_init_data(dev, regulator_desc, config,
@@ -5188,10 +5188,8 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	 * from a gpio extender or something else.
 	 */
 	if (PTR_ERR(init_data) == -EPROBE_DEFER) {
-		kfree(config);
-		kfree(rdev);
 		ret = -EPROBE_DEFER;
-		goto rinse;
+		goto clean;
 	}
 
 	/*
@@ -5244,7 +5242,6 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	}
 
 	/* register with sysfs */
-	device_initialize(&rdev->dev);
 	rdev->dev.class = &regulator_class;
 	rdev->dev.parent = dev;
 	dev_set_name(&rdev->dev, "regulator.%lu",
@@ -5322,13 +5319,11 @@ regulator_register(const struct regulator_desc *regulator_desc,
 	mutex_lock(&regulator_list_mutex);
 	regulator_ena_gpio_free(rdev);
 	mutex_unlock(&regulator_list_mutex);
-	put_device(&rdev->dev);
-	rdev = NULL;
 clean:
 	if (dangling_of_gpiod)
 		gpiod_put(config->ena_gpiod);
-	kfree(rdev);
 	kfree(config);
+	put_device(&rdev->dev);
 rinse:
 	if (dangling_cfg_gpiod)
 		gpiod_put(cfg->ena_gpiod);
-- 
GitLab


From 2dbf085594370abc1453356518719300d8a7acc1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= <mirq-linux@rere.qmqm.pl>
Date: Wed, 12 Aug 2020 03:31:37 +0200
Subject: [PATCH 0144/1341] regulator: cleanup regulator_ena_gpio_free()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Since only regulator_ena_gpio_request() allocates rdev->ena_pin, and it
guarantees that same gpiod gets same pin structure, it is enough to
compare just the pointers. Also we know there can be only one matching
entry on the list. Rework the code take advantage of the facts.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://lore.kernel.org/r/3ff002c7aa3bd774491af4291a9df23541fcf892.1597195321.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/core.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 1561f7555fc6f..6e2e74745d883 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -2287,19 +2287,19 @@ static void regulator_ena_gpio_free(struct regulator_dev *rdev)
 
 	/* Free the GPIO only in case of no use */
 	list_for_each_entry_safe(pin, n, &regulator_ena_gpio_list, list) {
-		if (pin->gpiod == rdev->ena_pin->gpiod) {
-			if (pin->request_count <= 1) {
-				pin->request_count = 0;
-				gpiod_put(pin->gpiod);
-				list_del(&pin->list);
-				kfree(pin);
-				rdev->ena_pin = NULL;
-				return;
-			} else {
-				pin->request_count--;
-			}
-		}
+		if (pin != rdev->ena_pin)
+			continue;
+
+		if (--pin->request_count)
+			break;
+
+		gpiod_put(pin->gpiod);
+		list_del(&pin->list);
+		kfree(pin);
+		break;
 	}
+
+	rdev->ena_pin = NULL;
 }
 
 /**
-- 
GitLab


From a577f3456c0a2fac3dee037c483753e6e68f3e49 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= <mirq-linux@rere.qmqm.pl>
Date: Wed, 12 Aug 2020 03:31:38 +0200
Subject: [PATCH 0145/1341] regulator: remove superfluous lock in
 regulator_resolve_coupling()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The code modifies rdev, but locks c_rdev instead. Remove the lock
as this is held together by regulator_list_mutex taken in the caller.

Fixes: f9503385b187 ("regulator: core: Mutually resolve regulators coupling")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/25eb81cefb37a646f3e44eaaf1d8ae8881cfde52.1597195321.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/core.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 6e2e74745d883..6789d1efdf5d1 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -4972,13 +4972,9 @@ static void regulator_resolve_coupling(struct regulator_dev *rdev)
 			return;
 		}
 
-		regulator_lock(c_rdev);
-
 		c_desc->coupled_rdevs[i] = c_rdev;
 		c_desc->n_resolved++;
 
-		regulator_unlock(c_rdev);
-
 		regulator_resolve_coupling(c_rdev);
 	}
 }
-- 
GitLab


From 5d187c0454ef4c5e046a81af36882d4d515922ec Mon Sep 17 00:00:00 2001
From: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Date: Thu, 6 Aug 2020 19:46:23 -0700
Subject: [PATCH 0146/1341] usb: dwc3: gadget: Don't setup more than requested

The SG list may be set up with entry size more than the requested
length. Check the usb_request->length and make sure that we don't setup
the TRBs to send/receive more than requested. This case may occur when
the SG entry is allocated up to a certain minimum size, but the request
length is less than that. It can also occur when the request is reused
for a different request length.

Cc: <stable@vger.kernel.org> # v4.18+
Fixes: a31e63b608ff ("usb: dwc3: gadget: Correct handling of scattergather lists")
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
---
 drivers/usb/dwc3/gadget.c | 51 +++++++++++++++++++++++++++------------
 1 file changed, 35 insertions(+), 16 deletions(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index e44bfc3b5096d..f9231253cbede 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1054,27 +1054,25 @@ static void __dwc3_prepare_one_trb(struct dwc3_ep *dep, struct dwc3_trb *trb,
  * dwc3_prepare_one_trb - setup one TRB from one request
  * @dep: endpoint for which this request is prepared
  * @req: dwc3_request pointer
+ * @trb_length: buffer size of the TRB
  * @chain: should this TRB be chained to the next?
  * @node: only for isochronous endpoints. First TRB needs different type.
  */
 static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
-		struct dwc3_request *req, unsigned chain, unsigned node)
+		struct dwc3_request *req, unsigned int trb_length,
+		unsigned chain, unsigned node)
 {
 	struct dwc3_trb		*trb;
-	unsigned int		length;
 	dma_addr_t		dma;
 	unsigned		stream_id = req->request.stream_id;
 	unsigned		short_not_ok = req->request.short_not_ok;
 	unsigned		no_interrupt = req->request.no_interrupt;
 	unsigned		is_last = req->request.is_last;
 
-	if (req->request.num_sgs > 0) {
-		length = sg_dma_len(req->start_sg);
+	if (req->request.num_sgs > 0)
 		dma = sg_dma_address(req->start_sg);
-	} else {
-		length = req->request.length;
+	else
 		dma = req->request.dma;
-	}
 
 	trb = &dep->trb_pool[dep->trb_enqueue];
 
@@ -1086,7 +1084,7 @@ static void dwc3_prepare_one_trb(struct dwc3_ep *dep,
 
 	req->num_trbs++;
 
-	__dwc3_prepare_one_trb(dep, trb, dma, length, chain, node,
+	__dwc3_prepare_one_trb(dep, trb, dma, trb_length, chain, node,
 			stream_id, short_not_ok, no_interrupt, is_last);
 }
 
@@ -1096,16 +1094,27 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
 	struct scatterlist *sg = req->start_sg;
 	struct scatterlist *s;
 	int		i;
-
+	unsigned int length = req->request.length;
 	unsigned int remaining = req->request.num_mapped_sgs
 		- req->num_queued_sgs;
 
+	/*
+	 * If we resume preparing the request, then get the remaining length of
+	 * the request and resume where we left off.
+	 */
+	for_each_sg(req->request.sg, s, req->num_queued_sgs, i)
+		length -= sg_dma_len(s);
+
 	for_each_sg(sg, s, remaining, i) {
-		unsigned int length = req->request.length;
 		unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);
 		unsigned int rem = length % maxp;
+		unsigned int trb_length;
 		unsigned chain = true;
 
+		trb_length = min_t(unsigned int, length, sg_dma_len(s));
+
+		length -= trb_length;
+
 		/*
 		 * IOMMU driver is coalescing the list of sgs which shares a
 		 * page boundary into one and giving it to USB driver. With
@@ -1113,7 +1122,7 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
 		 * sgs passed. So mark the chain bit to false if it isthe last
 		 * mapped sg.
 		 */
-		if (i == remaining - 1)
+		if ((i == remaining - 1) || !length)
 			chain = false;
 
 		if (rem && usb_endpoint_dir_out(dep->endpoint.desc) && !chain) {
@@ -1123,7 +1132,7 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
 			req->needs_extra_trb = true;
 
 			/* prepare normal TRB */
-			dwc3_prepare_one_trb(dep, req, true, i);
+			dwc3_prepare_one_trb(dep, req, trb_length, true, i);
 
 			/* Now prepare one extra TRB to align transfer size */
 			trb = &dep->trb_pool[dep->trb_enqueue];
@@ -1135,7 +1144,7 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
 					req->request.no_interrupt,
 					req->request.is_last);
 		} else {
-			dwc3_prepare_one_trb(dep, req, chain, i);
+			dwc3_prepare_one_trb(dep, req, trb_length, chain, i);
 		}
 
 		/*
@@ -1150,6 +1159,16 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
 
 		req->num_queued_sgs++;
 
+		/*
+		 * The number of pending SG entries may not correspond to the
+		 * number of mapped SG entries. If all the data are queued, then
+		 * don't include unused SG entries.
+		 */
+		if (length == 0) {
+			req->num_pending_sgs -= req->request.num_mapped_sgs - req->num_queued_sgs;
+			break;
+		}
+
 		if (!dwc3_calc_trbs_left(dep))
 			break;
 	}
@@ -1169,7 +1188,7 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep,
 		req->needs_extra_trb = true;
 
 		/* prepare normal TRB */
-		dwc3_prepare_one_trb(dep, req, true, 0);
+		dwc3_prepare_one_trb(dep, req, length, true, 0);
 
 		/* Now prepare one extra TRB to align transfer size */
 		trb = &dep->trb_pool[dep->trb_enqueue];
@@ -1187,7 +1206,7 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep,
 		req->needs_extra_trb = true;
 
 		/* prepare normal TRB */
-		dwc3_prepare_one_trb(dep, req, true, 0);
+		dwc3_prepare_one_trb(dep, req, length, true, 0);
 
 		/* Now prepare one extra TRB to handle ZLP */
 		trb = &dep->trb_pool[dep->trb_enqueue];
@@ -1198,7 +1217,7 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep,
 				req->request.no_interrupt,
 				req->request.is_last);
 	} else {
-		dwc3_prepare_one_trb(dep, req, false, 0);
+		dwc3_prepare_one_trb(dep, req, length, false, 0);
 	}
 }
 
-- 
GitLab


From d2ee3ff79e6a3d4105e684021017d100524dc560 Mon Sep 17 00:00:00 2001
From: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Date: Thu, 6 Aug 2020 19:46:29 -0700
Subject: [PATCH 0147/1341] usb: dwc3: gadget: Fix handling ZLP

The usb_request->zero doesn't apply for isoc. Also, if we prepare a
0-length (ZLP) TRB for the OUT direction, we need to prepare an extra
TRB to pad up to the MPS alignment. Use the same bounce buffer for the
ZLP TRB and the extra pad TRB.

Cc: <stable@vger.kernel.org> # v4.5+
Fixes: d6e5a549cc4d ("usb: dwc3: simplify ZLP handling")
Fixes: 04c03d10e507 ("usb: dwc3: gadget: handle request->zero")
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
---
 drivers/usb/dwc3/gadget.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index f9231253cbede..df603a817a98f 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1199,6 +1199,7 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep,
 				req->request.no_interrupt,
 				req->request.is_last);
 	} else if (req->request.zero && req->request.length &&
+		   !usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
 		   (IS_ALIGNED(req->request.length, maxp))) {
 		struct dwc3	*dwc = dep->dwc;
 		struct dwc3_trb	*trb;
@@ -1208,14 +1209,25 @@ static void dwc3_prepare_one_trb_linear(struct dwc3_ep *dep,
 		/* prepare normal TRB */
 		dwc3_prepare_one_trb(dep, req, length, true, 0);
 
-		/* Now prepare one extra TRB to handle ZLP */
+		/* Prepare one extra TRB to handle ZLP */
 		trb = &dep->trb_pool[dep->trb_enqueue];
 		req->num_trbs++;
 		__dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, 0,
-				false, 1, req->request.stream_id,
+				!req->direction, 1, req->request.stream_id,
 				req->request.short_not_ok,
 				req->request.no_interrupt,
 				req->request.is_last);
+
+		/* Prepare one more TRB to handle MPS alignment for OUT */
+		if (!req->direction) {
+			trb = &dep->trb_pool[dep->trb_enqueue];
+			req->num_trbs++;
+			__dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, maxp,
+					       false, 1, req->request.stream_id,
+					       req->request.short_not_ok,
+					       req->request.no_interrupt,
+					       req->request.is_last);
+		}
 	} else {
 		dwc3_prepare_one_trb(dep, req, length, false, 0);
 	}
@@ -2690,8 +2702,17 @@ static int dwc3_gadget_ep_cleanup_completed_request(struct dwc3_ep *dep,
 				status);
 
 	if (req->needs_extra_trb) {
+		unsigned int maxp = usb_endpoint_maxp(dep->endpoint.desc);
+
 		ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event,
 				status);
+
+		/* Reclaim MPS padding TRB for ZLP */
+		if (!req->direction && req->request.zero && req->request.length &&
+		    !usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
+		    (IS_ALIGNED(req->request.length, maxp)))
+			ret = dwc3_gadget_ep_reclaim_trb_linear(dep, req, event, status);
+
 		req->needs_extra_trb = false;
 	}
 
-- 
GitLab


From bc9a2e226ea95e1699f7590845554de095308b75 Mon Sep 17 00:00:00 2001
From: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Date: Thu, 6 Aug 2020 19:46:35 -0700
Subject: [PATCH 0148/1341] usb: dwc3: gadget: Handle ZLP for sg requests

Currently dwc3 doesn't handle usb_request->zero for SG requests. This
change checks and prepares extra TRBs for the ZLP for SG requests.

Cc: <stable@vger.kernel.org> # v4.5+
Fixes: 04c03d10e507 ("usb: dwc3: gadget: handle request->zero")
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
---
 drivers/usb/dwc3/gadget.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index df603a817a98f..c2a0f64f8d1e1 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1143,6 +1143,37 @@ static void dwc3_prepare_one_trb_sg(struct dwc3_ep *dep,
 					req->request.short_not_ok,
 					req->request.no_interrupt,
 					req->request.is_last);
+		} else if (req->request.zero && req->request.length &&
+			   !usb_endpoint_xfer_isoc(dep->endpoint.desc) &&
+			   !rem && !chain) {
+			struct dwc3	*dwc = dep->dwc;
+			struct dwc3_trb	*trb;
+
+			req->needs_extra_trb = true;
+
+			/* Prepare normal TRB */
+			dwc3_prepare_one_trb(dep, req, trb_length, true, i);
+
+			/* Prepare one extra TRB to handle ZLP */
+			trb = &dep->trb_pool[dep->trb_enqueue];
+			req->num_trbs++;
+			__dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, 0,
+					       !req->direction, 1,
+					       req->request.stream_id,
+					       req->request.short_not_ok,
+					       req->request.no_interrupt,
+					       req->request.is_last);
+
+			/* Prepare one more TRB to handle MPS alignment */
+			if (!req->direction) {
+				trb = &dep->trb_pool[dep->trb_enqueue];
+				req->num_trbs++;
+				__dwc3_prepare_one_trb(dep, trb, dwc->bounce_addr, maxp,
+						       false, 1, req->request.stream_id,
+						       req->request.short_not_ok,
+						       req->request.no_interrupt,
+						       req->request.is_last);
+			}
 		} else {
 			dwc3_prepare_one_trb(dep, req, trb_length, chain, i);
 		}
-- 
GitLab


From 1e4e4bcaf70ec89f8b499c93a83d078c1e5c0ea6 Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Date: Mon, 17 Aug 2020 16:03:01 +0530
Subject: [PATCH 0149/1341] powerpc/pkeys: Fix build error with PPC_MEM_KEYS
 disabled
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

IS_ENABLED() instead of #ifdef still requires variable declaration.
In this specific case, default_uamor is declared in asm/pkeys.h which
is only included if PPC_MEM_KEYS is enabled.

arch/powerpc/mm/book3s64/hash_utils.c: In function ‘hash__early_init_mmu_secondary’:
arch/powerpc/mm/book3s64/hash_utils.c:1119:21: error: ‘default_uamor’ undeclared (first use in this function)
 1119 |   mtspr(SPRN_UAMOR, default_uamor);
      |                     ^~~~~~~~~~~~~

Fixes: 6553fb799f60 ("powerpc/pkeys: Fix boot failures with Nemo board (A-EON AmigaOne X1000)")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200817103301.158836-1-aneesh.kumar@linux.ibm.com
---
 arch/powerpc/mm/book3s64/hash_utils.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c
index 1da9dbba92171..890a71c5293ee 100644
--- a/arch/powerpc/mm/book3s64/hash_utils.c
+++ b/arch/powerpc/mm/book3s64/hash_utils.c
@@ -1115,8 +1115,10 @@ void hash__early_init_mmu_secondary(void)
 			&& cpu_has_feature(CPU_FTR_HVMODE))
 		tlbiel_all();
 
-	if (IS_ENABLED(CONFIG_PPC_MEM_KEYS) && mmu_has_feature(MMU_FTR_PKEY))
+#ifdef CONFIG_PPC_MEM_KEYS
+	if (mmu_has_feature(MMU_FTR_PKEY))
 		mtspr(SPRN_UAMOR, default_uamor);
+#endif
 }
 #endif /* CONFIG_SMP */
 
-- 
GitLab


From fdc6edbb31fba76fd25d7bd016b675a92908d81e Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@csgroup.eu>
Date: Mon, 17 Aug 2020 06:03:26 +0000
Subject: [PATCH 0150/1341] powerpc/fixmap: Fix the size of the early debug
 area

Commit ("03fd42d458fb powerpc/fixmap: Fix FIX_EARLY_DEBUG_BASE when
page size is 256k") reworked the setup of the early debug area and
mistakenly replaced 128 * 1024 by SZ_128.

Change to SZ_128K to restore the original 128 kbytes size of the area.

Fixes: 03fd42d458fb ("powerpc/fixmap: Fix FIX_EARLY_DEBUG_BASE when page size is 256k")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/996184974d674ff984643778cf1cdd7fe58cc065.1597644194.git.christophe.leroy@csgroup.eu
---
 arch/powerpc/include/asm/fixmap.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/fixmap.h b/arch/powerpc/include/asm/fixmap.h
index 925cf89cbf4ba..6bfc87915d5db 100644
--- a/arch/powerpc/include/asm/fixmap.h
+++ b/arch/powerpc/include/asm/fixmap.h
@@ -52,7 +52,7 @@ enum fixed_addresses {
 	FIX_HOLE,
 	/* reserve the top 128K for early debugging purposes */
 	FIX_EARLY_DEBUG_TOP = FIX_HOLE,
-	FIX_EARLY_DEBUG_BASE = FIX_EARLY_DEBUG_TOP+(ALIGN(SZ_128, PAGE_SIZE)/PAGE_SIZE)-1,
+	FIX_EARLY_DEBUG_BASE = FIX_EARLY_DEBUG_TOP+(ALIGN(SZ_128K, PAGE_SIZE)/PAGE_SIZE)-1,
 #ifdef CONFIG_HIGHMEM
 	FIX_KMAP_BEGIN,	/* reserved pte's for temporary kernel mappings */
 	FIX_KMAP_END = FIX_KMAP_BEGIN+(KM_TYPE_NR*NR_CPUS)-1,
-- 
GitLab


From d7d8535f377e9ba87edbf7fbbd634ac942f3f54f Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@redhat.com>
Date: Mon, 17 Aug 2020 18:01:15 +0800
Subject: [PATCH 0151/1341] blk-mq: order adding requests to hctx->dispatch and
 checking SCHED_RESTART

SCHED_RESTART code path is relied to re-run queue for dispatch requests
in hctx->dispatch. Meantime the SCHED_RSTART flag is checked when adding
requests to hctx->dispatch.

memory barriers have to be used for ordering the following two pair of OPs:

1) adding requests to hctx->dispatch and checking SCHED_RESTART in
blk_mq_dispatch_rq_list()

2) clearing SCHED_RESTART and checking if there is request in hctx->dispatch
in blk_mq_sched_restart().

Without the added memory barrier, either:

1) blk_mq_sched_restart() may miss requests added to hctx->dispatch meantime
blk_mq_dispatch_rq_list() observes SCHED_RESTART, and not run queue in
dispatch side

or

2) blk_mq_dispatch_rq_list still sees SCHED_RESTART, and not run queue
in dispatch side, meantime checking if there is request in
hctx->dispatch from blk_mq_sched_restart() is missed.

IO hang in ltp/fs_fill test is reported by kernel test robot:

	https://lkml.org/lkml/2020/7/26/77

Turns out it is caused by the above out-of-order OPs. And the IO hang
can't be observed any more after applying this patch.

Fixes: bd166ef183c2 ("blk-mq-sched: add framework for MQ capable IO schedulers")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: David Jeffery <djeffery@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-mq-sched.c | 9 +++++++++
 block/blk-mq.c       | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/block/blk-mq-sched.c b/block/blk-mq-sched.c
index a19cdf159b753..d2790e5b06d14 100644
--- a/block/blk-mq-sched.c
+++ b/block/blk-mq-sched.c
@@ -78,6 +78,15 @@ void blk_mq_sched_restart(struct blk_mq_hw_ctx *hctx)
 		return;
 	clear_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
 
+	/*
+	 * Order clearing SCHED_RESTART and list_empty_careful(&hctx->dispatch)
+	 * in blk_mq_run_hw_queue(). Its pair is the barrier in
+	 * blk_mq_dispatch_rq_list(). So dispatch code won't see SCHED_RESTART,
+	 * meantime new request added to hctx->dispatch is missed to check in
+	 * blk_mq_run_hw_queue().
+	 */
+	smp_mb();
+
 	blk_mq_run_hw_queue(hctx, true);
 }
 
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 35f8d06924421..a80f4986e5949 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1437,6 +1437,15 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list,
 		list_splice_tail_init(list, &hctx->dispatch);
 		spin_unlock(&hctx->lock);
 
+		/*
+		 * Order adding requests to hctx->dispatch and checking
+		 * SCHED_RESTART flag. The pair of this smp_mb() is the one
+		 * in blk_mq_sched_restart(). Avoid restart code path to
+		 * miss the new added requests to hctx->dispatch, meantime
+		 * SCHED_RESTART is observed here.
+		 */
+		smp_mb();
+
 		/*
 		 * If SCHED_RESTART was set by the caller of this function and
 		 * it is no longer set that means that it was cleared by another
-- 
GitLab


From bcb21c8cc9947286211327d663ace69f07d37a76 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@redhat.com>
Date: Mon, 17 Aug 2020 18:01:30 +0800
Subject: [PATCH 0152/1341] block: loop: set discard granularity and alignment
 for block device backed loop

In case of block device backend, if the backend supports write zeros, the
loop device will set queue flag of QUEUE_FLAG_DISCARD. However,
limits.discard_granularity isn't setup, and this way is wrong,
see the following description in Documentation/ABI/testing/sysfs-block:

	A discard_granularity of 0 means that the device does not support
	discard functionality.

Especially 9b15d109a6b2 ("block: improve discard bio alignment in
__blkdev_issue_discard()") starts to take q->limits.discard_granularity
for computing max discard sectors. And zero discard granularity may cause
kernel oops, or fail discard request even though the loop queue claims
discard support via QUEUE_FLAG_DISCARD.

Fix the issue by setup discard granularity and alignment.

Fixes: c52abf563049 ("loop: Better discard support for block devices")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Coly Li <colyli@suse.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Xiao Ni <xni@redhat.com>
Cc: Martin K. Petersen <martin.petersen@oracle.com>
Cc: Evan Green <evgreen@chromium.org>
Cc: Gwendal Grignou <gwendal@chromium.org>
Cc: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Cc: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/loop.c | 33 ++++++++++++++++++---------------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 2f137d6ce169d..3d7a1901bf28c 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -878,6 +878,7 @@ static void loop_config_discard(struct loop_device *lo)
 	struct file *file = lo->lo_backing_file;
 	struct inode *inode = file->f_mapping->host;
 	struct request_queue *q = lo->lo_queue;
+	u32 granularity, max_discard_sectors;
 
 	/*
 	 * If the backing device is a block device, mirror its zeroing
@@ -890,11 +891,10 @@ static void loop_config_discard(struct loop_device *lo)
 		struct request_queue *backingq;
 
 		backingq = bdev_get_queue(inode->i_bdev);
-		blk_queue_max_discard_sectors(q,
-			backingq->limits.max_write_zeroes_sectors);
 
-		blk_queue_max_write_zeroes_sectors(q,
-			backingq->limits.max_write_zeroes_sectors);
+		max_discard_sectors = backingq->limits.max_write_zeroes_sectors;
+		granularity = backingq->limits.discard_granularity ?:
+			queue_physical_block_size(backingq);
 
 	/*
 	 * We use punch hole to reclaim the free space used by the
@@ -903,23 +903,26 @@ static void loop_config_discard(struct loop_device *lo)
 	 * useful information.
 	 */
 	} else if (!file->f_op->fallocate || lo->lo_encrypt_key_size) {
-		q->limits.discard_granularity = 0;
-		q->limits.discard_alignment = 0;
-		blk_queue_max_discard_sectors(q, 0);
-		blk_queue_max_write_zeroes_sectors(q, 0);
+		max_discard_sectors = 0;
+		granularity = 0;
 
 	} else {
-		q->limits.discard_granularity = inode->i_sb->s_blocksize;
-		q->limits.discard_alignment = 0;
-
-		blk_queue_max_discard_sectors(q, UINT_MAX >> 9);
-		blk_queue_max_write_zeroes_sectors(q, UINT_MAX >> 9);
+		max_discard_sectors = UINT_MAX >> 9;
+		granularity = inode->i_sb->s_blocksize;
 	}
 
-	if (q->limits.max_write_zeroes_sectors)
+	if (max_discard_sectors) {
+		q->limits.discard_granularity = granularity;
+		blk_queue_max_discard_sectors(q, max_discard_sectors);
+		blk_queue_max_write_zeroes_sectors(q, max_discard_sectors);
 		blk_queue_flag_set(QUEUE_FLAG_DISCARD, q);
-	else
+	} else {
+		q->limits.discard_granularity = 0;
+		blk_queue_max_discard_sectors(q, 0);
+		blk_queue_max_write_zeroes_sectors(q, 0);
 		blk_queue_flag_clear(QUEUE_FLAG_DISCARD, q);
+	}
+	q->limits.discard_alignment = 0;
 }
 
 static void loop_unprepare_queue(struct loop_device *lo)
-- 
GitLab


From 943b40c832beb71115e38a1c4d99b640b5342738 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@redhat.com>
Date: Mon, 17 Aug 2020 17:52:39 +0800
Subject: [PATCH 0153/1341] block: respect queue limit of max discard segment

When queue_max_discard_segments(q) is 1, blk_discard_mergable() will
return false for discard request, then normal request merge is applied.
However, only queue_max_segments() is checked, so max discard segment
limit isn't respected.

Check max discard segment limit in the request merge code for fixing
the issue.

Discard request failure of virtio_blk is fixed.

Fixes: 69840466086d ("block: fix the DISCARD request merge")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-merge.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 6529e3aab0011..7af1f3668a918 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -533,10 +533,17 @@ int __blk_rq_map_sg(struct request_queue *q, struct request *rq,
 }
 EXPORT_SYMBOL(__blk_rq_map_sg);
 
+static inline unsigned int blk_rq_get_max_segments(struct request *rq)
+{
+	if (req_op(rq) == REQ_OP_DISCARD)
+		return queue_max_discard_segments(rq->q);
+	return queue_max_segments(rq->q);
+}
+
 static inline int ll_new_hw_segment(struct request *req, struct bio *bio,
 		unsigned int nr_phys_segs)
 {
-	if (req->nr_phys_segments + nr_phys_segs > queue_max_segments(req->q))
+	if (req->nr_phys_segments + nr_phys_segs > blk_rq_get_max_segments(req))
 		goto no_merge;
 
 	if (blk_integrity_merge_bio(req->q, req, bio) == false)
@@ -624,7 +631,7 @@ static int ll_merge_requests_fn(struct request_queue *q, struct request *req,
 		return 0;
 
 	total_phys_segments = req->nr_phys_segments + next->nr_phys_segments;
-	if (total_phys_segments > queue_max_segments(q))
+	if (total_phys_segments > blk_rq_get_max_segments(req))
 		return 0;
 
 	if (blk_integrity_merge_rq(q, req, next) == false)
-- 
GitLab


From af822aa68fbdf0a480a17462ed70232998127453 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@redhat.com>
Date: Mon, 17 Aug 2020 17:52:40 +0800
Subject: [PATCH 0154/1341] block: virtio_blk: fix handling single range
 discard request

1f23816b8eb8 ("virtio_blk: add discard and write zeroes support") starts
to support multi-range discard for virtio-blk. However, the virtio-blk
disk may report max discard segment as 1, at least that is exactly what
qemu is doing.

So far, block layer switches to normal request merge if max discard segment
limit is 1, and multiple bios can be merged to single segment. This way may
cause memory corruption in virtblk_setup_discard_write_zeroes().

Fix the issue by handling single max discard segment in straightforward
way.

Fixes: 1f23816b8eb8 ("virtio_blk: add discard and write zeroes support")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Changpeng Liu <changpeng.liu@intel.com>
Cc: Daniel Verkamp <dverkamp@chromium.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Cc: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/virtio_blk.c | 31 +++++++++++++++++++++++--------
 1 file changed, 23 insertions(+), 8 deletions(-)

diff --git a/drivers/block/virtio_blk.c b/drivers/block/virtio_blk.c
index 63b213e00b375..b2e48dac1ebdb 100644
--- a/drivers/block/virtio_blk.c
+++ b/drivers/block/virtio_blk.c
@@ -126,16 +126,31 @@ static int virtblk_setup_discard_write_zeroes(struct request *req, bool unmap)
 	if (!range)
 		return -ENOMEM;
 
-	__rq_for_each_bio(bio, req) {
-		u64 sector = bio->bi_iter.bi_sector;
-		u32 num_sectors = bio->bi_iter.bi_size >> SECTOR_SHIFT;
-
-		range[n].flags = cpu_to_le32(flags);
-		range[n].num_sectors = cpu_to_le32(num_sectors);
-		range[n].sector = cpu_to_le64(sector);
-		n++;
+	/*
+	 * Single max discard segment means multi-range discard isn't
+	 * supported, and block layer only runs contiguity merge like
+	 * normal RW request. So we can't reply on bio for retrieving
+	 * each range info.
+	 */
+	if (queue_max_discard_segments(req->q) == 1) {
+		range[0].flags = cpu_to_le32(flags);
+		range[0].num_sectors = cpu_to_le32(blk_rq_sectors(req));
+		range[0].sector = cpu_to_le64(blk_rq_pos(req));
+		n = 1;
+	} else {
+		__rq_for_each_bio(bio, req) {
+			u64 sector = bio->bi_iter.bi_sector;
+			u32 num_sectors = bio->bi_iter.bi_size >> SECTOR_SHIFT;
+
+			range[n].flags = cpu_to_le32(flags);
+			range[n].num_sectors = cpu_to_le32(num_sectors);
+			range[n].sector = cpu_to_le64(sector);
+			n++;
+		}
 	}
 
+	WARN_ON_ONCE(n != segments);
+
 	req->special_vec.bv_page = virt_to_page(range);
 	req->special_vec.bv_offset = offset_in_page(range);
 	req->special_vec.bv_len = sizeof(*range) * segments;
-- 
GitLab


From 0ff5a4812be4ebd4782bbb555d369636eea164f7 Mon Sep 17 00:00:00 2001
From: Dinh Nguyen <dinguyen@kernel.org>
Date: Fri, 31 Jul 2020 10:26:40 -0500
Subject: [PATCH 0155/1341] ARM: dts: socfpga: fix register entry for timer3 on
 Arria10

Fixes the register address for the timer3 entry on Arria10.

Fixes: 475dc86d08de4 ("arm: dts: socfpga: Add a base DTSI for Altera's Arria10 SOC")
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
---
 arch/arm/boot/dts/socfpga_arria10.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/socfpga_arria10.dtsi b/arch/arm/boot/dts/socfpga_arria10.dtsi
index fc4abef143a06..0013ec3463c46 100644
--- a/arch/arm/boot/dts/socfpga_arria10.dtsi
+++ b/arch/arm/boot/dts/socfpga_arria10.dtsi
@@ -821,7 +821,7 @@ timer2: timer2@ffd00000 {
 		timer3: timer3@ffd00100 {
 			compatible = "snps,dw-apb-timer";
 			interrupts = <0 118 IRQ_TYPE_LEVEL_HIGH>;
-			reg = <0xffd01000 0x100>;
+			reg = <0xffd00100 0x100>;
 			clocks = <&l4_sys_free_clk>;
 			clock-names = "timer";
 			resets = <&rst L4SYSTIMER1_RESET>;
-- 
GitLab


From 88fee1c9007a38c19f2c558dc0ab1ddb4c323dc5 Mon Sep 17 00:00:00 2001
From: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Date: Fri, 14 Aug 2020 13:01:40 -0400
Subject: [PATCH 0156/1341] drm/dp_mst: Don't return error code when crtc is
 null

[Why]
In certain cases the crtc can be NULL and returning -EINVAL causes
atomic check to fail when it shouln't. This leads to valid
configurations failing because atomic check fails.

[How]
Don't early return if crtc is null

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
[added stable cc]
Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: 8ec046716ca8 ("drm/dp_mst: Add helper to trigger modeset on affected DSC MST CRTCs")
Cc: <stable@vger.kernel.org> # v5.6+
Link: https://patchwork.freedesktop.org/patch/msgid/20200814170140.24917-1-Bhawanpreet.Lakha@amd.com
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 1e26b89628f98..0a2f0b5c7a446 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -4990,8 +4990,8 @@ int drm_dp_mst_add_affected_dsc_crtcs(struct drm_atomic_state *state, struct drm
 
 		crtc = conn_state->crtc;
 
-		if (WARN_ON(!crtc))
-			return -EINVAL;
+		if (!crtc)
+			continue;
 
 		if (!drm_dp_mst_dsc_aux_for_port(pos->port))
 			continue;
-- 
GitLab


From a97ea93ed5b64704a2171c505355c12ab427b1b1 Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Tue, 21 Jul 2020 21:57:43 -0700
Subject: [PATCH 0157/1341] Makefile.extrawarn: Move sign-compare from W=2 to
 W=3

This -Wsign-compare compiler warning can be very noisy
and most of the suggested conversions are unnecessary.

Make the warning W=3 so it's described under the
"can most likely be ignored" block.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/Makefile.extrawarn | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn
index 62c275685b75e..95e4cdb94fe9f 100644
--- a/scripts/Makefile.extrawarn
+++ b/scripts/Makefile.extrawarn
@@ -66,7 +66,6 @@ KBUILD_CFLAGS += -Wnested-externs
 KBUILD_CFLAGS += -Wshadow
 KBUILD_CFLAGS += $(call cc-option, -Wlogical-op)
 KBUILD_CFLAGS += -Wmissing-field-initializers
-KBUILD_CFLAGS += -Wsign-compare
 KBUILD_CFLAGS += -Wtype-limits
 KBUILD_CFLAGS += $(call cc-option, -Wmaybe-uninitialized)
 KBUILD_CFLAGS += $(call cc-option, -Wunused-macros)
@@ -87,6 +86,7 @@ KBUILD_CFLAGS += -Wpacked
 KBUILD_CFLAGS += -Wpadded
 KBUILD_CFLAGS += -Wpointer-arith
 KBUILD_CFLAGS += -Wredundant-decls
+KBUILD_CFLAGS += -Wsign-compare
 KBUILD_CFLAGS += -Wswitch-default
 KBUILD_CFLAGS += $(call cc-option, -Wpacked-bitfield-compat)
 
-- 
GitLab


From bc93b9ae0151ae5ad5b8504cdc598428ea99570b Mon Sep 17 00:00:00 2001
From: Alex Williamson <alex.williamson@redhat.com>
Date: Mon, 17 Aug 2020 11:08:18 -0600
Subject: [PATCH 0158/1341] vfio-pci: Avoid recursive read-lock usage

A down_read on memory_lock is held when performing read/write accesses
to MMIO BAR space, including across the copy_to/from_user() callouts
which may fault.  If the user buffer for these copies resides in an
mmap of device MMIO space, the mmap fault handler will acquire a
recursive read-lock on memory_lock.  Avoid this by reducing the lock
granularity.  Sequential accesses requiring multiple ioread/iowrite
cycles are expected to be rare, therefore typical accesses should not
see additional overhead.

VGA MMIO accesses are expected to be non-fatal regardless of the PCI
memory enable bit to allow legacy probing, this behavior remains with
a comment added.  ioeventfds are now included in memory access testing,
with writes dropped while memory space is disabled.

Fixes: abafbc551fdd ("vfio-pci: Invalidate mmaps and block MMIO access on disabled memory")
Reported-by: Zhiyi Guo <zhguo@redhat.com>
Tested-by: Zhiyi Guo <zhguo@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---
 drivers/vfio/pci/vfio_pci_private.h |   2 +
 drivers/vfio/pci/vfio_pci_rdwr.c    | 120 ++++++++++++++++++++++------
 2 files changed, 98 insertions(+), 24 deletions(-)

diff --git a/drivers/vfio/pci/vfio_pci_private.h b/drivers/vfio/pci/vfio_pci_private.h
index 86a02aff8735f..61ca8ab165dc1 100644
--- a/drivers/vfio/pci/vfio_pci_private.h
+++ b/drivers/vfio/pci/vfio_pci_private.h
@@ -33,12 +33,14 @@
 
 struct vfio_pci_ioeventfd {
 	struct list_head	next;
+	struct vfio_pci_device	*vdev;
 	struct virqfd		*virqfd;
 	void __iomem		*addr;
 	uint64_t		data;
 	loff_t			pos;
 	int			bar;
 	int			count;
+	bool			test_mem;
 };
 
 struct vfio_pci_irq_ctx {
diff --git a/drivers/vfio/pci/vfio_pci_rdwr.c b/drivers/vfio/pci/vfio_pci_rdwr.c
index 916b184df3a5b..9e353c484ace2 100644
--- a/drivers/vfio/pci/vfio_pci_rdwr.c
+++ b/drivers/vfio/pci/vfio_pci_rdwr.c
@@ -37,17 +37,70 @@
 #define vfio_ioread8	ioread8
 #define vfio_iowrite8	iowrite8
 
+#define VFIO_IOWRITE(size) \
+static int vfio_pci_iowrite##size(struct vfio_pci_device *vdev,		\
+			bool test_mem, u##size val, void __iomem *io)	\
+{									\
+	if (test_mem) {							\
+		down_read(&vdev->memory_lock);				\
+		if (!__vfio_pci_memory_enabled(vdev)) {			\
+			up_read(&vdev->memory_lock);			\
+			return -EIO;					\
+		}							\
+	}								\
+									\
+	vfio_iowrite##size(val, io);					\
+									\
+	if (test_mem)							\
+		up_read(&vdev->memory_lock);				\
+									\
+	return 0;							\
+}
+
+VFIO_IOWRITE(8)
+VFIO_IOWRITE(16)
+VFIO_IOWRITE(32)
+#ifdef iowrite64
+VFIO_IOWRITE(64)
+#endif
+
+#define VFIO_IOREAD(size) \
+static int vfio_pci_ioread##size(struct vfio_pci_device *vdev,		\
+			bool test_mem, u##size *val, void __iomem *io)	\
+{									\
+	if (test_mem) {							\
+		down_read(&vdev->memory_lock);				\
+		if (!__vfio_pci_memory_enabled(vdev)) {			\
+			up_read(&vdev->memory_lock);			\
+			return -EIO;					\
+		}							\
+	}								\
+									\
+	*val = vfio_ioread##size(io);					\
+									\
+	if (test_mem)							\
+		up_read(&vdev->memory_lock);				\
+									\
+	return 0;							\
+}
+
+VFIO_IOREAD(8)
+VFIO_IOREAD(16)
+VFIO_IOREAD(32)
+
 /*
  * Read or write from an __iomem region (MMIO or I/O port) with an excluded
  * range which is inaccessible.  The excluded range drops writes and fills
  * reads with -1.  This is intended for handling MSI-X vector tables and
  * leftover space for ROM BARs.
  */
-static ssize_t do_io_rw(void __iomem *io, char __user *buf,
+static ssize_t do_io_rw(struct vfio_pci_device *vdev, bool test_mem,
+			void __iomem *io, char __user *buf,
 			loff_t off, size_t count, size_t x_start,
 			size_t x_end, bool iswrite)
 {
 	ssize_t done = 0;
+	int ret;
 
 	while (count) {
 		size_t fillable, filled;
@@ -66,9 +119,15 @@ static ssize_t do_io_rw(void __iomem *io, char __user *buf,
 				if (copy_from_user(&val, buf, 4))
 					return -EFAULT;
 
-				vfio_iowrite32(val, io + off);
+				ret = vfio_pci_iowrite32(vdev, test_mem,
+							 val, io + off);
+				if (ret)
+					return ret;
 			} else {
-				val = vfio_ioread32(io + off);
+				ret = vfio_pci_ioread32(vdev, test_mem,
+							&val, io + off);
+				if (ret)
+					return ret;
 
 				if (copy_to_user(buf, &val, 4))
 					return -EFAULT;
@@ -82,9 +141,15 @@ static ssize_t do_io_rw(void __iomem *io, char __user *buf,
 				if (copy_from_user(&val, buf, 2))
 					return -EFAULT;
 
-				vfio_iowrite16(val, io + off);
+				ret = vfio_pci_iowrite16(vdev, test_mem,
+							 val, io + off);
+				if (ret)
+					return ret;
 			} else {
-				val = vfio_ioread16(io + off);
+				ret = vfio_pci_ioread16(vdev, test_mem,
+							&val, io + off);
+				if (ret)
+					return ret;
 
 				if (copy_to_user(buf, &val, 2))
 					return -EFAULT;
@@ -98,9 +163,15 @@ static ssize_t do_io_rw(void __iomem *io, char __user *buf,
 				if (copy_from_user(&val, buf, 1))
 					return -EFAULT;
 
-				vfio_iowrite8(val, io + off);
+				ret = vfio_pci_iowrite8(vdev, test_mem,
+							val, io + off);
+				if (ret)
+					return ret;
 			} else {
-				val = vfio_ioread8(io + off);
+				ret = vfio_pci_ioread8(vdev, test_mem,
+						       &val, io + off);
+				if (ret)
+					return ret;
 
 				if (copy_to_user(buf, &val, 1))
 					return -EFAULT;
@@ -178,14 +249,6 @@ ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
 
 	count = min(count, (size_t)(end - pos));
 
-	if (res->flags & IORESOURCE_MEM) {
-		down_read(&vdev->memory_lock);
-		if (!__vfio_pci_memory_enabled(vdev)) {
-			up_read(&vdev->memory_lock);
-			return -EIO;
-		}
-	}
-
 	if (bar == PCI_ROM_RESOURCE) {
 		/*
 		 * The ROM can fill less space than the BAR, so we start the
@@ -213,7 +276,8 @@ ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
 		x_end = vdev->msix_offset + vdev->msix_size;
 	}
 
-	done = do_io_rw(io, buf, pos, count, x_start, x_end, iswrite);
+	done = do_io_rw(vdev, res->flags & IORESOURCE_MEM, io, buf, pos,
+			count, x_start, x_end, iswrite);
 
 	if (done >= 0)
 		*ppos += done;
@@ -221,9 +285,6 @@ ssize_t vfio_pci_bar_rw(struct vfio_pci_device *vdev, char __user *buf,
 	if (bar == PCI_ROM_RESOURCE)
 		pci_unmap_rom(pdev, io);
 out:
-	if (res->flags & IORESOURCE_MEM)
-		up_read(&vdev->memory_lock);
-
 	return done;
 }
 
@@ -278,7 +339,12 @@ ssize_t vfio_pci_vga_rw(struct vfio_pci_device *vdev, char __user *buf,
 		return ret;
 	}
 
-	done = do_io_rw(iomem, buf, off, count, 0, 0, iswrite);
+	/*
+	 * VGA MMIO is a legacy, non-BAR resource that hopefully allows
+	 * probing, so we don't currently worry about access in relation
+	 * to the memory enable bit in the command register.
+	 */
+	done = do_io_rw(vdev, false, iomem, buf, off, count, 0, 0, iswrite);
 
 	vga_put(vdev->pdev, rsrc);
 
@@ -296,17 +362,21 @@ static int vfio_pci_ioeventfd_handler(void *opaque, void *unused)
 
 	switch (ioeventfd->count) {
 	case 1:
-		vfio_iowrite8(ioeventfd->data, ioeventfd->addr);
+		vfio_pci_iowrite8(ioeventfd->vdev, ioeventfd->test_mem,
+				  ioeventfd->data, ioeventfd->addr);
 		break;
 	case 2:
-		vfio_iowrite16(ioeventfd->data, ioeventfd->addr);
+		vfio_pci_iowrite16(ioeventfd->vdev, ioeventfd->test_mem,
+				   ioeventfd->data, ioeventfd->addr);
 		break;
 	case 4:
-		vfio_iowrite32(ioeventfd->data, ioeventfd->addr);
+		vfio_pci_iowrite32(ioeventfd->vdev, ioeventfd->test_mem,
+				   ioeventfd->data, ioeventfd->addr);
 		break;
 #ifdef iowrite64
 	case 8:
-		vfio_iowrite64(ioeventfd->data, ioeventfd->addr);
+		vfio_pci_iowrite64(ioeventfd->vdev, ioeventfd->test_mem,
+				   ioeventfd->data, ioeventfd->addr);
 		break;
 #endif
 	}
@@ -378,11 +448,13 @@ long vfio_pci_ioeventfd(struct vfio_pci_device *vdev, loff_t offset,
 		goto out_unlock;
 	}
 
+	ioeventfd->vdev = vdev;
 	ioeventfd->addr = vdev->barmap[bar] + pos;
 	ioeventfd->data = data;
 	ioeventfd->pos = pos;
 	ioeventfd->bar = bar;
 	ioeventfd->count = count;
+	ioeventfd->test_mem = vdev->pdev->resource[bar].flags & IORESOURCE_MEM;
 
 	ret = vfio_virqfd_enable(ioeventfd, vfio_pci_ioeventfd_handler,
 				 NULL, NULL, &ioeventfd->virqfd, fd);
-- 
GitLab


From aae7a75a821a793ed6b8ad502a5890fb8e8f172d Mon Sep 17 00:00:00 2001
From: Alex Williamson <alex.williamson@redhat.com>
Date: Mon, 17 Aug 2020 11:09:13 -0600
Subject: [PATCH 0159/1341] vfio/type1: Add proper error unwind for
 vfio_iommu_replay()

The vfio_iommu_replay() function does not currently unwind on error,
yet it does pin pages, perform IOMMU mapping, and modify the vfio_dma
structure to indicate IOMMU mapping.  The IOMMU mappings are torn down
when the domain is destroyed, but the other actions go on to cause
trouble later.  For example, the iommu->domain_list can be empty if we
only have a non-IOMMU backed mdev attached.  We don't currently check
if the list is empty before getting the first entry in the list, which
leads to a bogus domain pointer.  If a vfio_dma entry is erroneously
marked as iommu_mapped, we'll attempt to use that bogus pointer to
retrieve the existing physical page addresses.

This is the scenario that uncovered this issue, attempting to hot-add
a vfio-pci device to a container with an existing mdev device and DMA
mappings, one of which could not be pinned, causing a failure adding
the new group to the existing container and setting the conditions
for a subsequent attempt to explode.

To resolve this, we can first check if the domain_list is empty so
that we can reject replay of a bogus domain, should we ever encounter
this inconsistent state again in the future.  The real fix though is
to add the necessary unwind support, which means cleaning up the
current pinning if an IOMMU mapping fails, then walking back through
the r-b tree of DMA entries, reading from the IOMMU which ranges are
mapped, and unmapping and unpinning those ranges.  To be able to do
this, we also defer marking the DMA entry as IOMMU mapped until all
entries are processed, in order to allow the unwind to know the
disposition of each entry.

Fixes: a54eb55045ae ("vfio iommu type1: Add support for mediated devices")
Reported-by: Zhiyi Guo <zhguo@redhat.com>
Tested-by: Zhiyi Guo <zhguo@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---
 drivers/vfio/vfio_iommu_type1.c | 71 ++++++++++++++++++++++++++++++---
 1 file changed, 66 insertions(+), 5 deletions(-)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index 6990fc711a80b..c992973cc2d5f 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -1424,13 +1424,16 @@ static int vfio_bus_type(struct device *dev, void *data)
 static int vfio_iommu_replay(struct vfio_iommu *iommu,
 			     struct vfio_domain *domain)
 {
-	struct vfio_domain *d;
+	struct vfio_domain *d = NULL;
 	struct rb_node *n;
 	unsigned long limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
 	int ret;
 
 	/* Arbitrarily pick the first domain in the list for lookups */
-	d = list_first_entry(&iommu->domain_list, struct vfio_domain, next);
+	if (!list_empty(&iommu->domain_list))
+		d = list_first_entry(&iommu->domain_list,
+				     struct vfio_domain, next);
+
 	n = rb_first(&iommu->dma_list);
 
 	for (; n; n = rb_next(n)) {
@@ -1448,6 +1451,11 @@ static int vfio_iommu_replay(struct vfio_iommu *iommu,
 				phys_addr_t p;
 				dma_addr_t i;
 
+				if (WARN_ON(!d)) { /* mapped w/o a domain?! */
+					ret = -EINVAL;
+					goto unwind;
+				}
+
 				phys = iommu_iova_to_phys(d->domain, iova);
 
 				if (WARN_ON(!phys)) {
@@ -1477,7 +1485,7 @@ static int vfio_iommu_replay(struct vfio_iommu *iommu,
 				if (npage <= 0) {
 					WARN_ON(!npage);
 					ret = (int)npage;
-					return ret;
+					goto unwind;
 				}
 
 				phys = pfn << PAGE_SHIFT;
@@ -1486,14 +1494,67 @@ static int vfio_iommu_replay(struct vfio_iommu *iommu,
 
 			ret = iommu_map(domain->domain, iova, phys,
 					size, dma->prot | domain->prot);
-			if (ret)
-				return ret;
+			if (ret) {
+				if (!dma->iommu_mapped)
+					vfio_unpin_pages_remote(dma, iova,
+							phys >> PAGE_SHIFT,
+							size >> PAGE_SHIFT,
+							true);
+				goto unwind;
+			}
 
 			iova += size;
 		}
+	}
+
+	/* All dmas are now mapped, defer to second tree walk for unwind */
+	for (n = rb_first(&iommu->dma_list); n; n = rb_next(n)) {
+		struct vfio_dma *dma = rb_entry(n, struct vfio_dma, node);
+
 		dma->iommu_mapped = true;
 	}
+
 	return 0;
+
+unwind:
+	for (; n; n = rb_prev(n)) {
+		struct vfio_dma *dma = rb_entry(n, struct vfio_dma, node);
+		dma_addr_t iova;
+
+		if (dma->iommu_mapped) {
+			iommu_unmap(domain->domain, dma->iova, dma->size);
+			continue;
+		}
+
+		iova = dma->iova;
+		while (iova < dma->iova + dma->size) {
+			phys_addr_t phys, p;
+			size_t size;
+			dma_addr_t i;
+
+			phys = iommu_iova_to_phys(domain->domain, iova);
+			if (!phys) {
+				iova += PAGE_SIZE;
+				continue;
+			}
+
+			size = PAGE_SIZE;
+			p = phys + size;
+			i = iova + size;
+			while (i < dma->iova + dma->size &&
+			       p == iommu_iova_to_phys(domain->domain, i)) {
+				size += PAGE_SIZE;
+				p += PAGE_SIZE;
+				i += PAGE_SIZE;
+			}
+
+			iommu_unmap(domain->domain, iova, size);
+			vfio_unpin_pages_remote(dma, iova, phys >> PAGE_SHIFT,
+						size >> PAGE_SHIFT, true);
+		}
+	}
+
+	return ret;
 }
 
 /*
-- 
GitLab


From 77ef38574beb3e0b414db48e9c0f04633df68ba6 Mon Sep 17 00:00:00 2001
From: Daniel Vetter <daniel.vetter@intel.com>
Date: Fri, 14 Aug 2020 11:38:42 +0200
Subject: [PATCH 0160/1341] drm/modeset-lock: Take the modeset BKL for legacy
 drivers

This fell off in the conversion in

commit 9bcaa3fe58ab7559e71df798bcff6e0795158695
Author: Michal Orzel <michalorzel.eng@gmail.com>
Date:   Tue Apr 28 19:10:04 2020 +0200

    drm: Replace drm_modeset_lock/unlock_all with DRM_MODESET_LOCK_ALL_* helpers

but it's caught by the drm_warn_on_modeset_not_all_locked() that the
legacy modeset code uses. Since this is the bkl and it's unclear
what's all protected, play it safe and grab it again for legacy
drivers.

Unfortunately this means we need to sprinkle a few more #includes
around.

Also we need to add the drm_device as a parameter to the _END macro.

Finally remove the mute_lock() from setcrtc, since that's now done by
the macro.

Cc: Alex Deucher <alexdeucher@gmail.com>
References: https://gitlab.freedesktop.org/drm/amd/-/issues/1224
Fixes: 9bcaa3fe58ab ("drm: Replace drm_modeset_lock/unlock_all with DRM_MODESET_LOCK_ALL_* helpers")
Cc: Michal Orzel <michalorzel.eng@gmail.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v5.8+
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200814093842.3048472-1-daniel.vetter@ffwll.ch
---
 drivers/gpu/drm/drm_atomic_helper.c | 7 ++++---
 drivers/gpu/drm/drm_color_mgmt.c    | 2 +-
 drivers/gpu/drm/drm_crtc.c          | 4 +---
 drivers/gpu/drm/drm_mode_object.c   | 4 ++--
 drivers/gpu/drm/drm_plane.c         | 2 +-
 include/drm/drm_modeset_lock.h      | 9 +++++++--
 6 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index 85d163f16801f..b78e142a5620c 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -34,6 +34,7 @@
 #include <drm/drm_bridge.h>
 #include <drm/drm_damage_helper.h>
 #include <drm/drm_device.h>
+#include <drm/drm_drv.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_print.h>
 #include <drm/drm_self_refresh_helper.h>
@@ -3105,7 +3106,7 @@ void drm_atomic_helper_shutdown(struct drm_device *dev)
 	if (ret)
 		DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret);
 
-	DRM_MODESET_LOCK_ALL_END(ctx, ret);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 }
 EXPORT_SYMBOL(drm_atomic_helper_shutdown);
 
@@ -3245,7 +3246,7 @@ struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev)
 	}
 
 unlock:
-	DRM_MODESET_LOCK_ALL_END(ctx, err);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, err);
 	if (err)
 		return ERR_PTR(err);
 
@@ -3326,7 +3327,7 @@ int drm_atomic_helper_resume(struct drm_device *dev,
 
 	err = drm_atomic_helper_commit_duplicated_state(state, &ctx);
 
-	DRM_MODESET_LOCK_ALL_END(ctx, err);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, err);
 	drm_atomic_state_put(state);
 
 	return err;
diff --git a/drivers/gpu/drm/drm_color_mgmt.c b/drivers/gpu/drm/drm_color_mgmt.c
index c93123ff7c218..138ff34b31db5 100644
--- a/drivers/gpu/drm/drm_color_mgmt.c
+++ b/drivers/gpu/drm/drm_color_mgmt.c
@@ -294,7 +294,7 @@ int drm_mode_gamma_set_ioctl(struct drm_device *dev,
 				     crtc->gamma_size, &ctx);
 
 out:
-	DRM_MODESET_LOCK_ALL_END(ctx, ret);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 	return ret;
 
 }
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 4936e1080e417..eb1c33e5d0f49 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -561,7 +561,6 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 	if (crtc_req->mode_valid && !drm_lease_held(file_priv, plane->base.id))
 		return -EACCES;
 
-	mutex_lock(&crtc->dev->mode_config.mutex);
 	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx,
 				   DRM_MODESET_ACQUIRE_INTERRUPTIBLE, ret);
 
@@ -728,8 +727,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 	fb = NULL;
 	mode = NULL;
 
-	DRM_MODESET_LOCK_ALL_END(ctx, ret);
-	mutex_unlock(&crtc->dev->mode_config.mutex);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_object.c
index 901b078abf40c..db05f386a709e 100644
--- a/drivers/gpu/drm/drm_mode_object.c
+++ b/drivers/gpu/drm/drm_mode_object.c
@@ -428,7 +428,7 @@ int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
 out_unref:
 	drm_mode_object_put(obj);
 out:
-	DRM_MODESET_LOCK_ALL_END(ctx, ret);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 	return ret;
 }
 
@@ -470,7 +470,7 @@ static int set_property_legacy(struct drm_mode_object *obj,
 		break;
 	}
 	drm_property_change_valid_put(prop, ref);
-	DRM_MODESET_LOCK_ALL_END(ctx, ret);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
 
 	return ret;
 }
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index 4af173ced3277..fdbafc2b81998 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -791,7 +791,7 @@ static int setplane_internal(struct drm_plane *plane,
 					  crtc_x, crtc_y, crtc_w, crtc_h,
 					  src_x, src_y, src_w, src_h, &ctx);
 
-	DRM_MODESET_LOCK_ALL_END(ctx, ret);
+	DRM_MODESET_LOCK_ALL_END(plane->dev, ctx, ret);
 
 	return ret;
 }
diff --git a/include/drm/drm_modeset_lock.h b/include/drm/drm_modeset_lock.h
index 4fc9a43ac45a8..aafd07388eb7b 100644
--- a/include/drm/drm_modeset_lock.h
+++ b/include/drm/drm_modeset_lock.h
@@ -164,6 +164,8 @@ int drm_modeset_lock_all_ctx(struct drm_device *dev,
  * is 0, so no error checking is necessary
  */
 #define DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, flags, ret)		\
+	if (!drm_drv_uses_atomic_modeset(dev))				\
+		mutex_lock(&dev->mode_config.mutex);			\
 	drm_modeset_acquire_init(&ctx, flags);				\
 modeset_lock_retry:							\
 	ret = drm_modeset_lock_all_ctx(dev, &ctx);			\
@@ -172,6 +174,7 @@ modeset_lock_retry:							\
 
 /**
  * DRM_MODESET_LOCK_ALL_END - Helper to release and cleanup modeset locks
+ * @dev: drm device
  * @ctx: local modeset acquire context, will be dereferenced
  * @ret: local ret/err/etc variable to track error status
  *
@@ -188,7 +191,7 @@ modeset_lock_retry:							\
  * to that failure. In both of these cases the code between BEGIN/END will not
  * be run, so the failure will reflect the inability to grab the locks.
  */
-#define DRM_MODESET_LOCK_ALL_END(ctx, ret)				\
+#define DRM_MODESET_LOCK_ALL_END(dev, ctx, ret)				\
 modeset_lock_fail:							\
 	if (ret == -EDEADLK) {						\
 		ret = drm_modeset_backoff(&ctx);			\
@@ -196,6 +199,8 @@ modeset_lock_fail:							\
 			goto modeset_lock_retry;			\
 	}								\
 	drm_modeset_drop_locks(&ctx);					\
-	drm_modeset_acquire_fini(&ctx);
+	drm_modeset_acquire_fini(&ctx);					\
+	if (!drm_drv_uses_atomic_modeset(dev))				\
+		mutex_unlock(&dev->mode_config.mutex);
 
 #endif /* DRM_MODESET_LOCK_H_ */
-- 
GitLab


From 98b0bf02738004829d7e26d6cb47b2e469aaba86 Mon Sep 17 00:00:00 2001
From: Yang Weijiang <weijiang.yang@intel.com>
Date: Fri, 14 Aug 2020 21:21:05 +0800
Subject: [PATCH 0161/1341] selftests: kvm: Use a shorter encoding to clear RAX

If debug_regs.c is built with newer binutils, the resulting binary is "optimized"
by the assembler:

asm volatile("ss_start: "
             "xor %%rax,%%rax\n\t"
             "cpuid\n\t"
             "movl $0x1a0,%%ecx\n\t"
             "rdmsr\n\t"
             : : : "rax", "ecx");

is translated to :

  000000000040194e <ss_start>:
  40194e:       31 c0                   xor    %eax,%eax     <----- rax->eax?
  401950:       0f a2                   cpuid
  401952:       b9 a0 01 00 00          mov    $0x1a0,%ecx
  401957:       0f 32                   rdmsr

As you can see rax is replaced with eax in target binary code.
This causes a difference is the length of xor instruction (2 Byte vs 3 Byte),
and makes the hard-coded instruction length check fail:

        /* Instruction lengths starting at ss_start */
        int ss_size[4] = {
                3,              /* xor */   <-------- 2 or 3?
                2,              /* cpuid */
                5,              /* mov */
                2,              /* rdmsr */
        };

Encode the shorter version directly and, while at it, fix the "clobbers"
of the asm.

Cc: stable@vger.kernel.org
Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 tools/testing/selftests/kvm/x86_64/debug_regs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/kvm/x86_64/debug_regs.c b/tools/testing/selftests/kvm/x86_64/debug_regs.c
index 8162c58a1234e..b8d14f9db5f9e 100644
--- a/tools/testing/selftests/kvm/x86_64/debug_regs.c
+++ b/tools/testing/selftests/kvm/x86_64/debug_regs.c
@@ -40,11 +40,11 @@ static void guest_code(void)
 
 	/* Single step test, covers 2 basic instructions and 2 emulated */
 	asm volatile("ss_start: "
-		     "xor %%rax,%%rax\n\t"
+		     "xor %%eax,%%eax\n\t"
 		     "cpuid\n\t"
 		     "movl $0x1a0,%%ecx\n\t"
 		     "rdmsr\n\t"
-		     : : : "rax", "ecx");
+		     : : : "eax", "ebx", "ecx", "edx");
 
 	/* DR6.BD test */
 	asm volatile("bd_start: mov %%dr0, %%rax" : : : "rax");
-- 
GitLab


From d8d0db7bb358ef65d60726a61bfcd08eccff0bc0 Mon Sep 17 00:00:00 2001
From: Tom Yan <tom.ty89@gmail.com>
Date: Tue, 18 Aug 2020 01:20:11 +0800
Subject: [PATCH 0162/1341] ALSA: usb-audio: ignore broken processing/extension
 unit

Some devices have broken extension unit where getting current value
doesn't work. Attempt that once when creating mixer control for it. If
it fails, just ignore it, so that it won't cripple the device entirely
(and/or make the error floods).

Signed-off-by: Tom Yan <tom.ty89@gmail.com>
Link: https://lore.kernel.org/r/5f3abc52.1c69fb81.9cf2.fe91@mx.google.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/mixer.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index 6b0f3a8469efe..81e987eaf0637 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -2371,7 +2371,7 @@ static int build_audio_procunit(struct mixer_build *state, int unitid,
 	int num_ins;
 	struct usb_mixer_elem_info *cval;
 	struct snd_kcontrol *kctl;
-	int i, err, nameid, type, len;
+	int i, err, nameid, type, len, val;
 	const struct procunit_info *info;
 	const struct procunit_value_info *valinfo;
 	const struct usbmix_name_map *map;
@@ -2474,6 +2474,12 @@ static int build_audio_procunit(struct mixer_build *state, int unitid,
 			break;
 		}
 
+		err = get_cur_ctl_value(cval, cval->control << 8, &val);
+		if (err < 0) {
+			usb_mixer_elem_info_free(cval);
+			return -EINVAL;
+		}
+
 		kctl = snd_ctl_new1(&mixer_procunit_ctl, cval);
 		if (!kctl) {
 			usb_mixer_elem_info_free(cval);
-- 
GitLab


From 19cf4b7eefc3040192bccb10c322e4c831bb0eb0 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 17 Aug 2020 13:53:04 -0400
Subject: [PATCH 0163/1341] KVM: x86: fix access code passed to gva_to_gpa

The PK bit of the error code is computed dynamically in permission_fault
and therefore need not be passed to gva_to_gpa: only the access bits
(fetch, user, write) need to be passed down.

Not doing so causes a splat in the pku test:

   WARNING: CPU: 25 PID: 5465 at arch/x86/kvm/mmu.h:197 paging64_walk_addr_generic+0x594/0x750 [kvm]
   Hardware name: Intel Corporation WilsonCity/WilsonCity, BIOS WLYDCRB1.SYS.0014.D62.2001092233 01/09/2020
   RIP: 0010:paging64_walk_addr_generic+0x594/0x750 [kvm]
   Code: <0f> 0b e9 db fe ff ff 44 8b 43 04 4c 89 6c 24 30 8b 13 41 39 d0 89
   RSP: 0018:ff53778fc623fb60 EFLAGS: 00010202
   RAX: 0000000000000001 RBX: ff53778fc623fbf0 RCX: 0000000000000007
   RDX: 0000000000000001 RSI: 0000000000000002 RDI: ff4501efba818000
   RBP: 0000000000000020 R08: 0000000000000005 R09: 00000000004000e7
   R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000007
   R13: ff4501efba818388 R14: 10000000004000e7 R15: 0000000000000000
   FS:  00007f2dcf31a700(0000) GS:ff4501f1c8040000(0000) knlGS:0000000000000000
   CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
   CR2: 0000000000000000 CR3: 0000001dea475005 CR4: 0000000000763ee0
   DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
   DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
   PKRU: 55555554
   Call Trace:
    paging64_gva_to_gpa+0x3f/0xb0 [kvm]
    kvm_fixup_and_inject_pf_error+0x48/0xa0 [kvm]
    handle_exception_nmi+0x4fc/0x5b0 [kvm_intel]
    kvm_arch_vcpu_ioctl_run+0x911/0x1c10 [kvm]
    kvm_vcpu_ioctl+0x23e/0x5d0 [kvm]
    ksys_ioctl+0x92/0xb0
    __x64_sys_ioctl+0x16/0x20
    do_syscall_64+0x3e/0xb0
    entry_SYSCALL_64_after_hwframe+0x44/0xa9
   ---[ end trace d17eb998aee991da ]---

Reported-by: Sean Christopherson <sean.j.christopherson@intel.com>
Fixes: 897861479c064 ("KVM: x86: Add helper functions for illegal GPA checking and page fault injection")
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/x86.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2db369a64f29d..fcfd79a02e85d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10743,9 +10743,11 @@ EXPORT_SYMBOL_GPL(kvm_spec_ctrl_test_value);
 void kvm_fixup_and_inject_pf_error(struct kvm_vcpu *vcpu, gva_t gva, u16 error_code)
 {
 	struct x86_exception fault;
+	u32 access = error_code &
+		(PFERR_WRITE_MASK | PFERR_FETCH_MASK | PFERR_USER_MASK);
 
 	if (!(error_code & PFERR_PRESENT_MASK) ||
-	    vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, error_code, &fault) != UNMAPPED_GVA) {
+	    vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, &fault) != UNMAPPED_GVA) {
 		/*
 		 * If vcpu->arch.walk_mmu->gva_to_gpa succeeded, the page
 		 * tables probably do not match the TLB.  Just proceed
-- 
GitLab


From ccc862b957c6413b008fbe458034372847992d7f Mon Sep 17 00:00:00 2001
From: Kalyan Thota <kalyan_t@codeaurora.org>
Date: Mon, 10 Aug 2020 18:19:18 +0530
Subject: [PATCH 0164/1341] drm/msm/dpu: Fix reservation failures in modeset

In TEST_ONLY commit, rm global_state will duplicate the
object and request for new reservations, once they pass
then the new state will be swapped with the old and will
be available for the Atomic Commit.

This patch fixes some of missing links in the resource
reservation sequence mentioned above.

1) Creation of duplicate state in test_only commit (Rob)
2) Allocate and release the resources on every modeset.
3) Avoid allocation only when active is false.

In a modeset operation, swap state happens well before
disable. Hence clearing reservations in disable will
cause failures in modeset enable.

Allow reservations to be cleared/allocated before swap,
such that only newly committed resources are pushed to HW.

Changes in v1:
 - Move the rm release to atomic_check.
 - Ensure resource allocation and free happens when active
   is not changed i.e only when mode is changed.(Rob)

Changes in v2:
 - Handle dpu_kms_get_global_state API failure as it may
   return EDEADLK (swboyd).

Signed-off-by: Kalyan Thota <kalyan_t@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index a97f6d2e5a089..bd6def436c657 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -599,7 +599,10 @@ static int dpu_encoder_virt_atomic_check(
 	dpu_kms = to_dpu_kms(priv->kms);
 	mode = &crtc_state->mode;
 	adj_mode = &crtc_state->adjusted_mode;
-	global_state = dpu_kms_get_existing_global_state(dpu_kms);
+	global_state = dpu_kms_get_global_state(crtc_state->state);
+	if (IS_ERR(global_state))
+		return PTR_ERR(global_state);
+
 	trace_dpu_enc_atomic_check(DRMID(drm_enc));
 
 	/* perform atomic check on the first physical encoder (master) */
@@ -625,12 +628,15 @@ static int dpu_encoder_virt_atomic_check(
 	/* Reserve dynamic resources now. */
 	if (!ret) {
 		/*
-		 * Avoid reserving resources when mode set is pending. Topology
-		 * info may not be available to complete reservation.
+		 * Release and Allocate resources on every modeset
+		 * Dont allocate when active is false.
 		 */
 		if (drm_atomic_crtc_needs_modeset(crtc_state)) {
-			ret = dpu_rm_reserve(&dpu_kms->rm, global_state,
-					drm_enc, crtc_state, topology);
+			dpu_rm_release(global_state, drm_enc);
+
+			if (!crtc_state->active_changed || crtc_state->active)
+				ret = dpu_rm_reserve(&dpu_kms->rm, global_state,
+						drm_enc, crtc_state, topology);
 		}
 	}
 
@@ -1181,7 +1187,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
 	struct dpu_encoder_virt *dpu_enc = NULL;
 	struct msm_drm_private *priv;
 	struct dpu_kms *dpu_kms;
-	struct dpu_global_state *global_state;
 	int i = 0;
 
 	if (!drm_enc) {
@@ -1200,7 +1205,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
 
 	priv = drm_enc->dev->dev_private;
 	dpu_kms = to_dpu_kms(priv->kms);
-	global_state = dpu_kms_get_existing_global_state(dpu_kms);
 
 	trace_dpu_enc_disable(DRMID(drm_enc));
 
@@ -1230,8 +1234,6 @@ static void dpu_encoder_virt_disable(struct drm_encoder *drm_enc)
 
 	DPU_DEBUG_ENC(dpu_enc, "encoder disabled\n");
 
-	dpu_rm_release(global_state, drm_enc);
-
 	mutex_unlock(&dpu_enc->enc_lock);
 }
 
-- 
GitLab


From 4c978caf08aa155bdeadd9e2d4b026d4ce97ebd0 Mon Sep 17 00:00:00 2001
From: Kalyan Thota <kalyan_t@codeaurora.org>
Date: Thu, 30 Jul 2020 19:08:56 +0530
Subject: [PATCH 0165/1341] drm/msm/dpu: Fix scale params in plane validation

Plane validation uses an API drm_calc_scale which will
return src/dst value as a scale ratio.

when viewing the range on a scale the values should fall in as

Upscale ratio < Unity scale < Downscale ratio for src/dst formula

Fix the min and max scale ratios to suit the API accordingly.

Signed-off-by: Kalyan Thota <kalyan_t@codeaurora.org>
Tested-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
index 33f6c56f01eda..29e373d2e7b5d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_plane.c
@@ -866,9 +866,9 @@ static int dpu_plane_atomic_check(struct drm_plane *plane,
 		crtc_state = drm_atomic_get_new_crtc_state(state->state,
 							   state->crtc);
 
-	min_scale = FRAC_16_16(1, pdpu->pipe_sblk->maxdwnscale);
+	min_scale = FRAC_16_16(1, pdpu->pipe_sblk->maxupscale);
 	ret = drm_atomic_helper_check_plane_state(state, crtc_state, min_scale,
-					  pdpu->pipe_sblk->maxupscale << 16,
+					  pdpu->pipe_sblk->maxdwnscale << 16,
 					  true, true);
 	if (ret) {
 		DPU_DEBUG_PLANE(pdpu, "Check plane state failed (%d)\n", ret);
-- 
GitLab


From 427890aff8558eb4326e723835e0eae0e6fe3102 Mon Sep 17 00:00:00 2001
From: Jim Mattson <jmattson@google.com>
Date: Mon, 17 Aug 2020 11:16:55 -0700
Subject: [PATCH 0166/1341] kvm: x86: Toggling CR4.SMAP does not load PDPTEs in
 PAE mode

See the SDM, volume 3, section 4.4.1:

If PAE paging would be in use following an execution of MOV to CR0 or
MOV to CR4 (see Section 4.1.1) and the instruction is modifying any of
CR0.CD, CR0.NW, CR0.PG, CR4.PAE, CR4.PGE, CR4.PSE, or CR4.SMEP; then
the PDPTEs are loaded from the address in CR3.

Fixes: 0be0226f07d14 ("KVM: MMU: fix SMAP virtualization")
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Message-Id: <20200817181655.3716509-2-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/x86.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index fcfd79a02e85d..ecc3470b279e2 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -975,7 +975,7 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 {
 	unsigned long old_cr4 = kvm_read_cr4(vcpu);
 	unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE |
-				   X86_CR4_SMEP | X86_CR4_SMAP | X86_CR4_PKE;
+				   X86_CR4_SMEP | X86_CR4_PKE;
 
 	if (kvm_valid_cr4(vcpu, cr4))
 		return 1;
-- 
GitLab


From 35c719da95c0d28560bff7bafeaf07ebb212665e Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@chromium.org>
Date: Tue, 11 Aug 2020 14:09:35 -0700
Subject: [PATCH 0167/1341] drm/msm/dpu: fix unitialized variable error

 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c:817 dpu_crtc_enable() error: uninitialized symbol 'request_bandwidth'.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
index f272a8d0f95b2..c2729f71e2fa7 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
@@ -827,7 +827,7 @@ static void dpu_crtc_enable(struct drm_crtc *crtc,
 {
 	struct dpu_crtc *dpu_crtc;
 	struct drm_encoder *encoder;
-	bool request_bandwidth;
+	bool request_bandwidth = false;
 
 	if (!crtc) {
 		DPU_ERROR("invalid crtc\n");
-- 
GitLab


From cb957adb4ea422bd758568df5b2478ea3bb34f35 Mon Sep 17 00:00:00 2001
From: Jim Mattson <jmattson@google.com>
Date: Mon, 17 Aug 2020 11:16:54 -0700
Subject: [PATCH 0168/1341] kvm: x86: Toggling CR4.PKE does not load PDPTEs in
 PAE mode

See the SDM, volume 3, section 4.4.1:

If PAE paging would be in use following an execution of MOV to CR0 or
MOV to CR4 (see Section 4.1.1) and the instruction is modifying any of
CR0.CD, CR0.NW, CR0.PG, CR4.PAE, CR4.PGE, CR4.PSE, or CR4.SMEP; then
the PDPTEs are loaded from the address in CR3.

Fixes: b9baba8614890 ("KVM, pkeys: expose CPUID/CR4 to guest")
Cc: Huaitong Han <huaitong.han@intel.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Peter Shier <pshier@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Message-Id: <20200817181655.3716509-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/x86.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ecc3470b279e2..539ea1cd6020c 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -975,7 +975,7 @@ int kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
 {
 	unsigned long old_cr4 = kvm_read_cr4(vcpu);
 	unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE |
-				   X86_CR4_SMEP | X86_CR4_PKE;
+				   X86_CR4_SMEP;
 
 	if (kvm_valid_cr4(vcpu, cr4))
 		return 1;
-- 
GitLab


From f228af11dfa1d1616bc67f3a4119ab77c36181f1 Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@chromium.org>
Date: Wed, 12 Aug 2020 17:03:09 -0700
Subject: [PATCH 0169/1341] drm/msm/adreno: fix updating ring fence

We need to set it to the most recent completed fence, not the most
recent submitted.  Otherwise we have races where we think we can retire
submits that the GPU is not finished with, if the GPU doesn't manage to
overwrite the seqno before we look at it.

This can show up with hang recovery if one of the submits after the
crashing submit also hangs after it is replayed.

Fixes: f97decac5f4c ("drm/msm: Support multiple ringbuffers")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index e23641a5ec841..d2dbb6968cba4 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -396,7 +396,7 @@ int adreno_hw_init(struct msm_gpu *gpu)
 		ring->next = ring->start;
 
 		/* reset completed fence seqno: */
-		ring->memptrs->fence = ring->seqno;
+		ring->memptrs->fence = ring->fctx->completed_fence;
 		ring->memptrs->rptr = 0;
 	}
 
-- 
GitLab


From 352c83fb39cae3eff95a8e1ed23006291abb6196 Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@chromium.org>
Date: Mon, 17 Aug 2020 09:23:09 -0700
Subject: [PATCH 0170/1341] drm/msm/gpu: make ringbuffer readonly

The GPU has no business writing into the ringbuffer, let's make it
readonly to the GPU.

Fixes: 7198e6b03155 ("drm/msm: add a3xx gpu support")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/msm_ringbuffer.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.c b/drivers/gpu/drm/msm/msm_ringbuffer.c
index e397c44cc0112..39ecb5a18431e 100644
--- a/drivers/gpu/drm/msm/msm_ringbuffer.c
+++ b/drivers/gpu/drm/msm/msm_ringbuffer.c
@@ -27,7 +27,8 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
 	ring->id = id;
 
 	ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ,
-		MSM_BO_WC, gpu->aspace, &ring->bo, &ring->iova);
+		MSM_BO_WC | MSM_BO_GPU_READONLY, gpu->aspace, &ring->bo,
+		&ring->iova);
 
 	if (IS_ERR(ring->start)) {
 		ret = PTR_ERR(ring->start);
-- 
GitLab


From f49c7faf776f16607c948d852a03b04a88c3b583 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Mon, 17 Aug 2020 12:32:08 +0100
Subject: [PATCH 0171/1341] of/address: check for invalid range.cpu_addr

Currently invalid CPU addresses are not being sanity checked resulting in
SATA setup failure on a SynQuacer SC2A11 development machine. The original
check was removed by and earlier commit, so add a sanity check back in
to avoid this regression.

Fixes: 7a8b64d17e35 ("of/address: use range parser for of_dma_get_range")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200817113208.523805-1-colin.king@canonical.com
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/of/address.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 590493e04b012..945b3d785f440 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -985,6 +985,11 @@ int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *siz
 			/* Don't error out as we'd break some existing DTs */
 			continue;
 		}
+		if (range.cpu_addr == OF_BAD_ADDR) {
+			pr_err("translation of DMA address(%llx) to CPU address failed node(%pOF)\n",
+			       range.bus_addr, node);
+			continue;
+		}
 		dma_offset = range.cpu_addr - range.bus_addr;
 
 		/* Take lower and upper limits */
-- 
GitLab


From 20925fe84463ef87a01b0b536768c39544eae89b Mon Sep 17 00:00:00 2001
From: Sharat Masetty <smasetty@codeaurora.org>
Date: Mon, 13 Jul 2020 18:11:43 +0530
Subject: [PATCH 0172/1341] drm: msm: a6xx: use dev_pm_opp_set_bw to scale DDR

This patches replaces the previously used static DDR vote and uses
dev_pm_opp_set_bw() to scale GPU->DDR bandwidth along with scaling
GPU frequency. Also since the icc path voting is handled completely
in the opp driver, remove the icc_path handle and its usage in the
drm driver.

Signed-off-by: Sharat Masetty <smasetty@codeaurora.org>
Signed-off-by: Akhil P Oommen <akhilpo@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 25 +++++++++++++++++--------
 1 file changed, 17 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index b67b38c8fadf7..5b2df7d481386 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -133,7 +133,7 @@ void a6xx_gmu_set_freq(struct msm_gpu *gpu, struct dev_pm_opp *opp)
 
 	if (!gmu->legacy) {
 		a6xx_hfi_set_freq(gmu, perf_index);
-		icc_set_bw(gpu->icc_path, 0, MBps_to_icc(7216));
+		dev_pm_opp_set_bw(&gpu->pdev->dev, opp);
 		pm_runtime_put(gmu->dev);
 		return;
 	}
@@ -157,11 +157,7 @@ void a6xx_gmu_set_freq(struct msm_gpu *gpu, struct dev_pm_opp *opp)
 	if (ret)
 		dev_err(gmu->dev, "GMU set GPU frequency error: %d\n", ret);
 
-	/*
-	 * Eventually we will want to scale the path vote with the frequency but
-	 * for now leave it at max so that the performance is nominal.
-	 */
-	icc_set_bw(gpu->icc_path, 0, MBps_to_icc(7216));
+	dev_pm_opp_set_bw(&gpu->pdev->dev, opp);
 	pm_runtime_put(gmu->dev);
 }
 
@@ -849,6 +845,19 @@ static void a6xx_gmu_set_initial_freq(struct msm_gpu *gpu, struct a6xx_gmu *gmu)
 	dev_pm_opp_put(gpu_opp);
 }
 
+static void a6xx_gmu_set_initial_bw(struct msm_gpu *gpu, struct a6xx_gmu *gmu)
+{
+	struct dev_pm_opp *gpu_opp;
+	unsigned long gpu_freq = gmu->gpu_freqs[gmu->current_perf_index];
+
+	gpu_opp = dev_pm_opp_find_freq_exact(&gpu->pdev->dev, gpu_freq, true);
+	if (IS_ERR_OR_NULL(gpu_opp))
+		return;
+
+	dev_pm_opp_set_bw(&gpu->pdev->dev, gpu_opp);
+	dev_pm_opp_put(gpu_opp);
+}
+
 int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu)
 {
 	struct adreno_gpu *adreno_gpu = &a6xx_gpu->base;
@@ -882,7 +891,7 @@ int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu)
 	}
 
 	/* Set the bus quota to a reasonable value for boot */
-	icc_set_bw(gpu->icc_path, 0, MBps_to_icc(3072));
+	a6xx_gmu_set_initial_bw(gpu, gmu);
 
 	/* Enable the GMU interrupt */
 	gmu_write(gmu, REG_A6XX_GMU_AO_HOST_INTERRUPT_CLR, ~0);
@@ -1051,7 +1060,7 @@ int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu)
 		a6xx_gmu_shutdown(gmu);
 
 	/* Remove the bus vote */
-	icc_set_bw(gpu->icc_path, 0, 0);
+	dev_pm_opp_set_bw(&gpu->pdev->dev, NULL);
 
 	/*
 	 * Make sure the GX domain is off before turning off the GMU (CX)
-- 
GitLab


From 62c789270c0b1ed5598c6b87c53b6908cd3c6eb5 Mon Sep 17 00:00:00 2001
From: Zqiang <qiang.zhang@windriver.com>
Date: Wed, 12 Aug 2020 16:55:01 +0800
Subject: [PATCH 0173/1341] libnvdimm: KASAN: global-out-of-bounds Read in
 internal_create_group

Because the last member of the "nvdimm_firmware_attributes" array
was not assigned a null ptr, when traversal of "grp->attrs" array
is out of bounds in "create_files" func.

func:
	create_files:
		->for (i = 0, attr = grp->attrs; *attr && !error; i++, attr++)
			->....

BUG: KASAN: global-out-of-bounds in create_files fs/sysfs/group.c:43 [inline]
BUG: KASAN: global-out-of-bounds in internal_create_group+0x9d8/0xb20
fs/sysfs/group.c:149
Read of size 8 at addr ffffffff8a2e4cf0 by task kworker/u17:10/959

CPU: 2 PID: 959 Comm: kworker/u17:10 Not tainted 5.8.0-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009),
BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: events_unbound async_run_entry_fn
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0x5/0x497 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
 create_files fs/sysfs/group.c:43 [inline]
 internal_create_group+0x9d8/0xb20 fs/sysfs/group.c:149
 internal_create_groups.part.0+0x90/0x140 fs/sysfs/group.c:189
 internal_create_groups fs/sysfs/group.c:185 [inline]
 sysfs_create_groups+0x25/0x50 fs/sysfs/group.c:215
 device_add_groups drivers/base/core.c:2024 [inline]
 device_add_attrs drivers/base/core.c:2178 [inline]
 device_add+0x7fd/0x1c40 drivers/base/core.c:2881
 nd_async_device_register+0x12/0x80 drivers/nvdimm/bus.c:506
 async_run_entry_fn+0x121/0x530 kernel/async.c:123
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

The buggy address belongs to the variable:
 nvdimm_firmware_attributes+0x10/0x40

Link: https://lore.kernel.org/r/20200812085501.30963-1-qiang.zhang@windriver.com
Link: https://lore.kernel.org/r/20200814150509.225615-1-vaibhav@linux.ibm.com
Fixes: 48001ea50d17f ("PM, libnvdimm: Add runtime firmware activation support")
Reported-by: syzbot+1cf0ffe61aecf46f588f@syzkaller.appspotmail.com
Reported-by: Sandipan Das <sandipan@linux.ibm.com>
Reported-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Zqiang <qiang.zhang@windriver.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
 drivers/nvdimm/dimm_devs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvdimm/dimm_devs.c b/drivers/nvdimm/dimm_devs.c
index 61374def51555..b59032e0859b7 100644
--- a/drivers/nvdimm/dimm_devs.c
+++ b/drivers/nvdimm/dimm_devs.c
@@ -529,6 +529,7 @@ static DEVICE_ATTR_ADMIN_RW(activate);
 static struct attribute *nvdimm_firmware_attributes[] = {
 	&dev_attr_activate.attr,
 	&dev_attr_result.attr,
+	NULL,
 };
 
 static umode_t nvdimm_firmware_visible(struct kobject *kobj, struct attribute *a, int n)
-- 
GitLab


From cf28f3bbfca097d956f9021cb710dfad56adcc62 Mon Sep 17 00:00:00 2001
From: Yonghong Song <yhs@fb.com>
Date: Mon, 17 Aug 2020 10:42:14 -0700
Subject: [PATCH 0174/1341] bpf: Use get_file_rcu() instead of get_file() for
 task_file iterator

With latest `bpftool prog` command, we observed the following kernel
panic.
    BUG: kernel NULL pointer dereference, address: 0000000000000000
    #PF: supervisor instruction fetch in kernel mode
    #PF: error_code(0x0010) - not-present page
    PGD dfe894067 P4D dfe894067 PUD deb663067 PMD 0
    Oops: 0010 [#1] SMP
    CPU: 9 PID: 6023 ...
    RIP: 0010:0x0
    Code: Bad RIP value.
    RSP: 0000:ffffc900002b8f18 EFLAGS: 00010286
    RAX: ffff8883a405f400 RBX: ffff888e46a6bf00 RCX: 000000008020000c
    RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8883a405f400
    RBP: ffff888e46a6bf50 R08: 0000000000000000 R09: ffffffff81129600
    R10: ffff8883a405f300 R11: 0000160000000000 R12: 0000000000002710
    R13: 000000e9494b690c R14: 0000000000000202 R15: 0000000000000009
    FS:  00007fd9187fe700(0000) GS:ffff888e46a40000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: ffffffffffffffd6 CR3: 0000000de5d33002 CR4: 0000000000360ee0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    Call Trace:
     <IRQ>
     rcu_core+0x1a4/0x440
     __do_softirq+0xd3/0x2c8
     irq_exit+0x9d/0xa0
     smp_apic_timer_interrupt+0x68/0x120
     apic_timer_interrupt+0xf/0x20
     </IRQ>
    RIP: 0033:0x47ce80
    Code: Bad RIP value.
    RSP: 002b:00007fd9187fba40 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
    RAX: 0000000000000002 RBX: 00007fd931789160 RCX: 000000000000010c
    RDX: 00007fd9308cdfb4 RSI: 00007fd9308cdfb4 RDI: 00007ffedd1ea0a8
    RBP: 00007fd9187fbab0 R08: 000000000000000e R09: 000000000000002a
    R10: 0000000000480210 R11: 00007fd9187fc570 R12: 00007fd9316cc400
    R13: 0000000000000118 R14: 00007fd9308cdfb4 R15: 00007fd9317a9380

After further analysis, the bug is triggered by
Commit eaaacd23910f ("bpf: Add task and task/file iterator targets")
which introduced task_file bpf iterator, which traverses all open file
descriptors for all tasks in the current namespace.
The latest `bpftool prog` calls a task_file bpf program to traverse
all files in the system in order to associate processes with progs/maps, etc.
When traversing files for a given task, rcu read_lock is taken to
access all files in a file_struct. But it used get_file() to grab
a file, which is not right. It is possible file->f_count is 0 and
get_file() will unconditionally increase it.
Later put_file() may cause all kind of issues with the above
as one of sympotoms.

The failure can be reproduced with the following steps in a few seconds:
    $ cat t.c
    #include <stdio.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <fcntl.h>
    #include <unistd.h>

    #define N 10000
    int fd[N];
    int main() {
      int i;

      for (i = 0; i < N; i++) {
        fd[i] = open("./note.txt", 'r');
        if (fd[i] < 0) {
           fprintf(stderr, "failed\n");
           return -1;
        }
      }
      for (i = 0; i < N; i++)
        close(fd[i]);

      return 0;
    }
    $ gcc -O2 t.c
    $ cat run.sh
    #/bin/bash
    for i in {1..100}
    do
      while true; do ./a.out; done &
    done
    $ ./run.sh
    $ while true; do bpftool prog >& /dev/null; done

This patch used get_file_rcu() which only grabs a file if the
file->f_count is not zero. This is to ensure the file pointer
is always valid. The above reproducer did not fail for more
than 30 minutes.

Fixes: eaaacd23910f ("bpf: Add task and task/file iterator targets")
Suggested-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/bpf/20200817174214.252601-1-yhs@fb.com
---
 kernel/bpf/task_iter.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/bpf/task_iter.c b/kernel/bpf/task_iter.c
index 232df29793e96..f21b5e1e4540e 100644
--- a/kernel/bpf/task_iter.c
+++ b/kernel/bpf/task_iter.c
@@ -178,10 +178,11 @@ task_file_seq_get_next(struct bpf_iter_seq_task_file_info *info,
 		f = fcheck_files(curr_files, curr_fd);
 		if (!f)
 			continue;
+		if (!get_file_rcu(f))
+			continue;
 
 		/* set info->fd */
 		info->fd = curr_fd;
-		get_file(f);
 		rcu_read_unlock();
 		return f;
 	}
-- 
GitLab


From 7c2308f79fc81ba0bf24ccd2429fb483a91bcd51 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 10 Aug 2020 14:48:43 +0200
Subject: [PATCH 0175/1341] PCI/P2PDMA: Fix build without DMA ops

My commit to make DMA ops support optional missed the reference in
the p2pdma code.  And while the build bot didn't manage to find a config
where this can happen, Matthew did.  Fix this by replacing two IS_ENABLED
checks with ifdefs.

Fixes: 2f9237d4f6df ("dma-mapping: make support for dma ops optional")
Link: https://lore.kernel.org/r/20200810124843.1532738-1-hch@lst.de
Reported-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
---
 drivers/pci/p2pdma.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index 64ebed129dbf5..f357f9a32b3a5 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -556,13 +556,14 @@ int pci_p2pdma_distance_many(struct pci_dev *provider, struct device **clients,
 		return -1;
 
 	for (i = 0; i < num_clients; i++) {
-		if (IS_ENABLED(CONFIG_DMA_VIRT_OPS) &&
-		    clients[i]->dma_ops == &dma_virt_ops) {
+#ifdef CONFIG_DMA_VIRT_OPS
+		if (clients[i]->dma_ops == &dma_virt_ops) {
 			if (verbose)
 				dev_warn(clients[i],
 					 "cannot be used for peer-to-peer DMA because the driver makes use of dma_virt_ops\n");
 			return -1;
 		}
+#endif
 
 		pci_client = find_parent_pci_dev(clients[i]);
 		if (!pci_client) {
@@ -842,9 +843,10 @@ static int __pci_p2pdma_map_sg(struct pci_p2pdma_pagemap *p2p_pgmap,
 	 * this should never happen because it will be prevented
 	 * by the check in pci_p2pdma_distance_many()
 	 */
-	if (WARN_ON_ONCE(IS_ENABLED(CONFIG_DMA_VIRT_OPS) &&
-			 dev->dma_ops == &dma_virt_ops))
+#ifdef CONFIG_DMA_VIRT_OPS
+	if (WARN_ON_ONCE(dev->dma_ops == &dma_virt_ops))
 		return 0;
+#endif
 
 	for_each_sg(sg, s, nents, i) {
 		paddr = sg_phys(s);
-- 
GitLab


From 2138d1c918246e3d8193c3cb8b6d22d0bb888061 Mon Sep 17 00:00:00 2001
From: Jing Xiangfeng <jingxiangfeng@huawei.com>
Date: Thu, 6 Aug 2020 15:01:35 +0800
Subject: [PATCH 0176/1341] scsi: ufs: ti-j721e-ufs: Fix error return in
 ti_j721e_ufs_probe()

Fix to return error code PTR_ERR() from the error handling case instead of
0.

Link: https://lore.kernel.org/r/20200806070135.67797-1-jingxiangfeng@huawei.com
Fixes: 22617e216331 ("scsi: ufs: ti-j721e-ufs: Fix unwinding of pm_runtime changes")
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/ufs/ti-j721e-ufs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/ufs/ti-j721e-ufs.c b/drivers/scsi/ufs/ti-j721e-ufs.c
index 46bb905b4d6a9..eafe0db98d542 100644
--- a/drivers/scsi/ufs/ti-j721e-ufs.c
+++ b/drivers/scsi/ufs/ti-j721e-ufs.c
@@ -38,6 +38,7 @@ static int ti_j721e_ufs_probe(struct platform_device *pdev)
 	/* Select MPHY refclk frequency */
 	clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(clk)) {
+		ret = PTR_ERR(clk);
 		dev_err(dev, "Cannot claim MPHY clock.\n");
 		goto clk_err;
 	}
-- 
GitLab


From fa39ab5184d64563cd36f2fb5f0d3fbad83a432c Mon Sep 17 00:00:00 2001
From: Mike Christie <michael.christie@oracle.com>
Date: Fri, 7 Aug 2020 15:23:33 -0500
Subject: [PATCH 0177/1341] scsi: fcoe: Fix I/O path allocation

ixgbe_fcoe_ddp_setup() can be called from the main I/O path and is called
with a spin_lock held, so we have to use GFP_ATOMIC allocation instead of
GFP_KERNEL.

Link: https://lore.kernel.org/r/1596831813-9839-1-git-send-email-michael.christie@oracle.com
cc: Hannes Reinecke <hare@suse.de>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
index e67b1a59ecb7c..0fcd82036d4e3 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_fcoe.c
@@ -193,7 +193,7 @@ static int ixgbe_fcoe_ddp_setup(struct net_device *netdev, u16 xid,
 	}
 
 	/* alloc the udl from per cpu ddp pool */
-	ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_KERNEL, &ddp->udp);
+	ddp->udl = dma_pool_alloc(ddp_pool->pool, GFP_ATOMIC, &ddp->udp);
 	if (!ddp->udl) {
 		e_err(drv, "failed allocated ddp context\n");
 		goto out_noddp_unmap;
-- 
GitLab


From 93b6c5db06028a3b55122bbb74d0715dd8ca4ae0 Mon Sep 17 00:00:00 2001
From: Stanley Chu <stanley.chu@mediatek.com>
Date: Sun, 9 Aug 2020 13:07:34 +0800
Subject: [PATCH 0178/1341] scsi: ufs: Fix possible infinite loop in
 ufshcd_hold

In ufshcd_suspend(), after clk-gating is suspended and link is set
as Hibern8 state, ufshcd_hold() is still possibly invoked before
ufshcd_suspend() returns. For example, MediaTek's suspend vops may
issue UIC commands which would call ufshcd_hold() during the command
issuing flow.

Now if UFSHCD_CAP_HIBERN8_WITH_CLK_GATING capability is enabled,
then ufshcd_hold() may enter infinite loops because there is no
clk-ungating work scheduled or pending. In this case, ufshcd_hold()
shall just bypass, and keep the link as Hibern8 state.

Link: https://lore.kernel.org/r/20200809050734.18740-1-stanley.chu@mediatek.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Co-developed-by: Andy Teng <andy.teng@mediatek.com>
Signed-off-by: Andy Teng <andy.teng@mediatek.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/ufs/ufshcd.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 3076222842398..b4f948027b3e6 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1561,6 +1561,7 @@ static void ufshcd_ungate_work(struct work_struct *work)
 int ufshcd_hold(struct ufs_hba *hba, bool async)
 {
 	int rc = 0;
+	bool flush_result;
 	unsigned long flags;
 
 	if (!ufshcd_is_clkgating_allowed(hba))
@@ -1592,7 +1593,9 @@ int ufshcd_hold(struct ufs_hba *hba, bool async)
 				break;
 			}
 			spin_unlock_irqrestore(hba->host->host_lock, flags);
-			flush_work(&hba->clk_gating.ungate_work);
+			flush_result = flush_work(&hba->clk_gating.ungate_work);
+			if (hba->clk_gating.is_suspended && !flush_result)
+				goto out;
 			spin_lock_irqsave(hba->host->host_lock, flags);
 			goto start;
 		}
-- 
GitLab


From 215d326702516366a8dfa9624b67ba0761c22b86 Mon Sep 17 00:00:00 2001
From: Stanley Chu <stanley.chu@mediatek.com>
Date: Sun, 9 Aug 2020 13:57:02 +0800
Subject: [PATCH 0179/1341] scsi: ufs-mediatek: Fix incorrect time to wait link
 status

Fix incorrect calculation of "ms" based waiting time in function
ufs_mtk_setup_clocks().

Link: https://lore.kernel.org/r/20200809055702.20140-1-stanley.chu@mediatek.com
Fixes: 9006e3986f66 ("scsi: ufs-mediatek: Do not gate clocks if auto-hibern8 is not entered yet")
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/ufs/ufs-mediatek.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufs-mediatek.c b/drivers/scsi/ufs/ufs-mediatek.c
index 29cd017c1aa06..1755dd6b04aec 100644
--- a/drivers/scsi/ufs/ufs-mediatek.c
+++ b/drivers/scsi/ufs/ufs-mediatek.c
@@ -212,7 +212,7 @@ static int ufs_mtk_wait_link_state(struct ufs_hba *hba, u32 state,
 	ktime_t timeout, time_checked;
 	u32 val;
 
-	timeout = ktime_add_us(ktime_get(), ms_to_ktime(max_wait_ms));
+	timeout = ktime_add_ms(ktime_get(), max_wait_ms);
 	do {
 		time_checked = ktime_get();
 		ufshcd_writel(hba, 0x20, REG_UFS_DEBUG_SEL);
-- 
GitLab


From 8da76f71fef7d8a1a72af09d48899573feb60065 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Mon, 10 Aug 2020 17:10:24 +0300
Subject: [PATCH 0180/1341] scsi: ufs-pci: Add quirk for broken auto-hibernate
 for Intel EHL

Intel EHL UFS host controller advertises auto-hibernate capability but it
does not work correctly. Add a quirk for that.

[mkp: checkpatch fix]

Link: https://lore.kernel.org/r/20200810141024.28859-1-adrian.hunter@intel.com
Fixes: 8c09d7527697 ("scsi: ufshdc-pci: Add Intel PCI IDs for EHL")
Acked-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/ufs/ufshcd-pci.c | 16 ++++++++++++++--
 drivers/scsi/ufs/ufshcd.h     |  9 ++++++++-
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd-pci.c b/drivers/scsi/ufs/ufshcd-pci.c
index f407b13883acb..5a95a7bfbab0c 100644
--- a/drivers/scsi/ufs/ufshcd-pci.c
+++ b/drivers/scsi/ufs/ufshcd-pci.c
@@ -44,11 +44,23 @@ static int ufs_intel_link_startup_notify(struct ufs_hba *hba,
 	return err;
 }
 
+static int ufs_intel_ehl_init(struct ufs_hba *hba)
+{
+	hba->quirks |= UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8;
+	return 0;
+}
+
 static struct ufs_hba_variant_ops ufs_intel_cnl_hba_vops = {
 	.name                   = "intel-pci",
 	.link_startup_notify	= ufs_intel_link_startup_notify,
 };
 
+static struct ufs_hba_variant_ops ufs_intel_ehl_hba_vops = {
+	.name                   = "intel-pci",
+	.init			= ufs_intel_ehl_init,
+	.link_startup_notify	= ufs_intel_link_startup_notify,
+};
+
 #ifdef CONFIG_PM_SLEEP
 /**
  * ufshcd_pci_suspend - suspend power management function
@@ -177,8 +189,8 @@ static const struct dev_pm_ops ufshcd_pci_pm_ops = {
 static const struct pci_device_id ufshcd_pci_tbl[] = {
 	{ PCI_VENDOR_ID_SAMSUNG, 0xC00C, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
 	{ PCI_VDEVICE(INTEL, 0x9DFA), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
-	{ PCI_VDEVICE(INTEL, 0x4B41), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
-	{ PCI_VDEVICE(INTEL, 0x4B43), (kernel_ulong_t)&ufs_intel_cnl_hba_vops },
+	{ PCI_VDEVICE(INTEL, 0x4B41), (kernel_ulong_t)&ufs_intel_ehl_hba_vops },
+	{ PCI_VDEVICE(INTEL, 0x4B43), (kernel_ulong_t)&ufs_intel_ehl_hba_vops },
 	{ }	/* terminate list */
 };
 
diff --git a/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h
index b2ef18f1b7467..363589c0bd370 100644
--- a/drivers/scsi/ufs/ufshcd.h
+++ b/drivers/scsi/ufs/ufshcd.h
@@ -520,6 +520,12 @@ enum ufshcd_quirks {
 	 * OCS FATAL ERROR with device error through sense data
 	 */
 	UFSHCD_QUIRK_BROKEN_OCS_FATAL_ERROR		= 1 << 10,
+
+	/*
+	 * This quirk needs to be enabled if the host controller has
+	 * auto-hibernate capability but it doesn't work.
+	 */
+	UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8		= 1 << 11,
 };
 
 enum ufshcd_caps {
@@ -803,7 +809,8 @@ return true;
 
 static inline bool ufshcd_is_auto_hibern8_supported(struct ufs_hba *hba)
 {
-	return (hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT);
+	return (hba->capabilities & MASK_AUTO_HIBERN8_SUPPORT) &&
+		!(hba->quirks & UFSHCD_QUIRK_BROKEN_AUTO_HIBERN8);
 }
 
 static inline bool ufshcd_is_auto_hibern8_enabled(struct ufs_hba *hba)
-- 
GitLab


From 6337f58cec030b34ced435b3d9d7d29d63c96e36 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 11 Aug 2020 16:39:35 +0300
Subject: [PATCH 0181/1341] scsi: ufs: Fix interrupt error message for shared
 interrupts

The interrupt might be shared, in which case it is not an error for the
interrupt handler to be called when the interrupt status is zero, so don't
print the message unless there was enabled interrupt status.

Link: https://lore.kernel.org/r/20200811133936.19171-1-adrian.hunter@intel.com
Fixes: 9333d7757348 ("scsi: ufs: Fix irq return code")
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/ufs/ufshcd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index b4f948027b3e6..22f801428a07f 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5969,7 +5969,7 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba)
 		intr_status = ufshcd_readl(hba, REG_INTERRUPT_STATUS);
 	} while (intr_status && --retries);
 
-	if (retval == IRQ_NONE) {
+	if (enabled_intr_status && retval == IRQ_NONE) {
 		dev_err(hba->dev, "%s: Unhandled interrupt 0x%08x\n",
 					__func__, intr_status);
 		ufshcd_dump_regs(hba, 0, UFSHCI_REG_SPACE_SIZE, "host_regs: ");
-- 
GitLab


From 127d5f7c4b653b8be5eb3b2c7bbe13728f9003ff Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Tue, 11 Aug 2020 16:39:36 +0300
Subject: [PATCH 0182/1341] scsi: ufs: Improve interrupt handling for shared
 interrupts

For shared interrupts, the interrupt status might be zero, so check that
first.

Link: https://lore.kernel.org/r/20200811133936.19171-2-adrian.hunter@intel.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/ufs/ufshcd.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 22f801428a07f..0af3dd37ae6f7 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -5944,7 +5944,7 @@ static irqreturn_t ufshcd_sl_intr(struct ufs_hba *hba, u32 intr_status)
  */
 static irqreturn_t ufshcd_intr(int irq, void *__hba)
 {
-	u32 intr_status, enabled_intr_status;
+	u32 intr_status, enabled_intr_status = 0;
 	irqreturn_t retval = IRQ_NONE;
 	struct ufs_hba *hba = __hba;
 	int retries = hba->nutrs;
@@ -5958,7 +5958,7 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba)
 	 * read, make sure we handle them by checking the interrupt status
 	 * again in a loop until we process all of the reqs before returning.
 	 */
-	do {
+	while (intr_status && retries--) {
 		enabled_intr_status =
 			intr_status & ufshcd_readl(hba, REG_INTERRUPT_ENABLE);
 		if (intr_status)
@@ -5967,7 +5967,7 @@ static irqreturn_t ufshcd_intr(int irq, void *__hba)
 			retval |= ufshcd_sl_intr(hba, enabled_intr_status);
 
 		intr_status = ufshcd_readl(hba, REG_INTERRUPT_STATUS);
-	} while (intr_status && --retries);
+	}
 
 	if (enabled_intr_status && retval == IRQ_NONE) {
 		dev_err(hba->dev, "%s: Unhandled interrupt 0x%08x\n",
-- 
GitLab


From b10178ee7fa88b68a9e8adc06534d2605cb0ec23 Mon Sep 17 00:00:00 2001
From: Stanley Chu <stanley.chu@mediatek.com>
Date: Tue, 11 Aug 2020 16:18:58 +0200
Subject: [PATCH 0183/1341] scsi: ufs: Clean up completed request without
 interrupt notification

If somehow no interrupt notification is raised for a completed request and
its doorbell bit is cleared by host, UFS driver needs to cleanup its
outstanding bit in ufshcd_abort(). Otherwise, system may behave abnormally
in the following scenario:

After ufshcd_abort() returns, this request will be requeued by SCSI layer
with its outstanding bit set. Any future completed request will trigger
ufshcd_transfer_req_compl() to handle all "completed outstanding bits". At
this time the "abnormal outstanding bit" will be detected and the "requeued
request" will be chosen to execute request post-processing flow. This is
wrong because this request is still "alive".

Link: https://lore.kernel.org/r/20200811141859.27399-2-huobean@gmail.com
Reviewed-by: Can Guo <cang@codeaurora.org>
Acked-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/ufs/ufshcd.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 0af3dd37ae6f7..5d49361e7d885 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6495,7 +6495,7 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
 			/* command completed already */
 			dev_err(hba->dev, "%s: cmd at tag %d successfully cleared from DB.\n",
 				__func__, tag);
-			goto out;
+			goto cleanup;
 		} else {
 			dev_err(hba->dev,
 				"%s: no response from device. tag = %d, err %d\n",
@@ -6529,6 +6529,7 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
 		goto out;
 	}
 
+cleanup:
 	scsi_dma_unmap(cmd);
 
 	spin_lock_irqsave(host->host_lock, flags);
-- 
GitLab


From d87a1f6d021f401f99ae2ba8ccddb87dac921308 Mon Sep 17 00:00:00 2001
From: Bean Huo <beanhuo@micron.com>
Date: Tue, 11 Aug 2020 16:18:59 +0200
Subject: [PATCH 0184/1341] scsi: ufs: No need to send Abort Task if the task
 in DB was cleared

If the bit corresponding to a task in the Doorbell register has been
cleared, no need to poll the status of the task on the device side and to
send an Abort Task TM. Instead, let it directly goto cleanup.

In addition, to keep original debug output, move the goto below the debug
print.

Link: https://lore.kernel.org/r/20200811141859.27399-3-huobean@gmail.com
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Reviewed-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Bean Huo <beanhuo@micron.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/ufs/ufshcd.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index 5d49361e7d885..da199fa7a3e07 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -6437,14 +6437,8 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
 		goto out;
 	}
 
-	if (!(reg & (1 << tag))) {
-		dev_err(hba->dev,
-		"%s: cmd was completed, but without a notifying intr, tag = %d",
-		__func__, tag);
-	}
-
 	/* Print Transfer Request of aborted task */
-	dev_err(hba->dev, "%s: Device abort task at tag %d\n", __func__, tag);
+	dev_info(hba->dev, "%s: Device abort task at tag %d\n", __func__, tag);
 
 	/*
 	 * Print detailed info about aborted request.
@@ -6465,6 +6459,13 @@ static int ufshcd_abort(struct scsi_cmnd *cmd)
 	}
 	hba->req_abort_count++;
 
+	if (!(reg & (1 << tag))) {
+		dev_err(hba->dev,
+		"%s: cmd was completed, but without a notifying intr, tag = %d",
+		__func__, tag);
+		goto cleanup;
+	}
+
 	/* Skip task abort in case previous aborts failed and report failure */
 	if (lrbp->req_abort_skip) {
 		err = -EIO;
-- 
GitLab


From 2d9a2c5f581be3991ba67fa9e7497c711220ea8e Mon Sep 17 00:00:00 2001
From: Steffen Maier <maier@linux.ibm.com>
Date: Thu, 13 Aug 2020 17:28:56 +0200
Subject: [PATCH 0185/1341] scsi: zfcp: Fix use-after-free in request timeout
 handlers

Before v4.15 commit 75492a51568b ("s390/scsi: Convert timers to use
timer_setup()"), we intentionally only passed zfcp_adapter as context
argument to zfcp_fsf_request_timeout_handler(). Since we only trigger
adapter recovery, it was unnecessary to sync against races between timeout
and (late) completion.  Likewise, we only passed zfcp_erp_action as context
argument to zfcp_erp_timeout_handler(). Since we only wakeup an ERP action,
it was unnecessary to sync against races between timeout and (late)
completion.

Meanwhile the timeout handlers get timer_list as context argument and do a
timer-specific container-of to zfcp_fsf_req which can have been freed.

Fix it by making sure that any request timeout handlers, that might just
have started before del_timer(), are completed by using del_timer_sync()
instead. This ensures the request free happens afterwards.

Space time diagram of potential use-after-free:

Basic idea is to have 2 or more pending requests whose timeouts run out at
almost the same time.

req 1 timeout     ERP thread        req 2 timeout
----------------  ----------------  ---------------------------------------
zfcp_fsf_request_timeout_handler
fsf_req = from_timer(fsf_req, t, timer)
adapter = fsf_req->adapter
zfcp_qdio_siosl(adapter)
zfcp_erp_adapter_reopen(adapter,...)
                  zfcp_erp_strategy
                  ...
                  zfcp_fsf_req_dismiss_all
                  list_for_each_entry_safe
                    zfcp_fsf_req_complete 1
                    del_timer 1
                    zfcp_fsf_req_free 1
                    zfcp_fsf_req_complete 2
                                    zfcp_fsf_request_timeout_handler
                    del_timer 2
                                    fsf_req = from_timer(fsf_req, t, timer)
                    zfcp_fsf_req_free 2
                                    adapter = fsf_req->adapter
                                              ^^^^^^^ already freed

Link: https://lore.kernel.org/r/20200813152856.50088-1-maier@linux.ibm.com
Fixes: 75492a51568b ("s390/scsi: Convert timers to use timer_setup()")
Cc: <stable@vger.kernel.org> #4.15+
Suggested-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/s390/scsi/zfcp_fsf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c
index c795f22249d8f..140186fe1d1e0 100644
--- a/drivers/s390/scsi/zfcp_fsf.c
+++ b/drivers/s390/scsi/zfcp_fsf.c
@@ -434,7 +434,7 @@ static void zfcp_fsf_req_complete(struct zfcp_fsf_req *req)
 		return;
 	}
 
-	del_timer(&req->timer);
+	del_timer_sync(&req->timer);
 	zfcp_fsf_protstatus_eval(req);
 	zfcp_fsf_fsfstatus_eval(req);
 	req->handler(req);
@@ -867,7 +867,7 @@ static int zfcp_fsf_req_send(struct zfcp_fsf_req *req)
 	req->qdio_req.qdio_outb_usage = atomic_read(&qdio->req_q_free);
 	req->issued = get_tod_clock();
 	if (zfcp_qdio_send(qdio, &req->qdio_req)) {
-		del_timer(&req->timer);
+		del_timer_sync(&req->timer);
 		/* lookup request again, list might have changed */
 		zfcp_reqlist_find_rm(adapter->req_list, req_id);
 		zfcp_erp_adapter_reopen(adapter, 0, "fsrs__1");
-- 
GitLab


From 223f91b48079227f914657f07d2d686f7b60aa26 Mon Sep 17 00:00:00 2001
From: Douglas Gilbert <dgilbert@interlog.com>
Date: Thu, 13 Aug 2020 11:57:38 -0400
Subject: [PATCH 0186/1341] scsi: scsi_debug: Fix scp is NULL errors

John Garry reported 'sdebug_q_cmd_complete: scp is NULL' failures that were
mainly seen on aarch64 machines (e.g. RPi 4 with four A72 CPUs). The
problem was tracked down to a missing critical section on a "short circuit"
path. Namely, the time to process the current command so far has already
exceeded the requested command duration (i.e. the number of nanoseconds in
the ndelay parameter).

The random=1 parameter setting was pivotal in finding this error.  The
failure scenario involved first taking that "short circuit" path (due to a
very short command duration) and then taking the more likely
hrtimer_start() path (due to a longer command duration). With random=1 each
command's duration is taken from the uniformly distributed [0..ndelay)
interval.  The fio utility also helped by reliably generating the error
scenario at about once per minute on a RPi 4 (64 bit OS).

Link: https://lore.kernel.org/r/20200813155738.109298-1-dgilbert@interlog.com
Reported-by: John Garry <john.garry@huawei.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/scsi_debug.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 064ed680c0530..139f0073da371 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -5490,9 +5490,11 @@ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip,
 				u64 d = ktime_get_boottime_ns() - ns_from_boot;
 
 				if (kt <= d) {	/* elapsed duration >= kt */
+					spin_lock_irqsave(&sqp->qc_lock, iflags);
 					sqcp->a_cmnd = NULL;
 					atomic_dec(&devip->num_in_q);
 					clear_bit(k, sqp->in_use_bm);
+					spin_unlock_irqrestore(&sqp->qc_lock, iflags);
 					if (new_sd_dp)
 						kfree(sd_dp);
 					/* call scsi_done() from this thread */
-- 
GitLab


From c314a014b1802d30f1dc50db18b2e7f5a77d19c6 Mon Sep 17 00:00:00 2001
From: Enzo Matsumiya <ematsumiya@suse.de>
Date: Wed, 5 Aug 2020 17:05:46 -0300
Subject: [PATCH 0187/1341] scsi: qla2xxx: Use MBX_TOV_SECONDS for mailbox
 command timeout values

Improves readability of qla_mbx.c.

Link: https://lore.kernel.org/r/20200805200546.22497-1-ematsumiya@suse.de
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Enzo Matsumiya <ematsumiya@suse.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_mbx.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 73883435ab587..77e1e24125cab 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -5240,7 +5240,7 @@ qla2x00_read_ram_word(scsi_qla_host_t *vha, uint32_t risc_addr, uint32_t *data)
 	mcp->mb[8] = MSW(risc_addr);
 	mcp->out_mb = MBX_8|MBX_1|MBX_0;
 	mcp->in_mb = MBX_3|MBX_2|MBX_0;
-	mcp->tov = 30;
+	mcp->tov = MBX_TOV_SECONDS;
 	mcp->flags = 0;
 	rval = qla2x00_mailbox_command(vha, mcp);
 	if (rval != QLA_SUCCESS) {
@@ -5428,7 +5428,7 @@ qla2x00_write_ram_word(scsi_qla_host_t *vha, uint32_t risc_addr, uint32_t data)
 	mcp->mb[8] = MSW(risc_addr);
 	mcp->out_mb = MBX_8|MBX_3|MBX_2|MBX_1|MBX_0;
 	mcp->in_mb = MBX_1|MBX_0;
-	mcp->tov = 30;
+	mcp->tov = MBX_TOV_SECONDS;
 	mcp->flags = 0;
 	rval = qla2x00_mailbox_command(vha, mcp);
 	if (rval != QLA_SUCCESS) {
@@ -5700,7 +5700,7 @@ qla24xx_set_fcp_prio(scsi_qla_host_t *vha, uint16_t loop_id, uint16_t priority,
 	mcp->mb[9] = vha->vp_idx;
 	mcp->out_mb = MBX_9|MBX_4|MBX_3|MBX_2|MBX_1|MBX_0;
 	mcp->in_mb = MBX_4|MBX_3|MBX_1|MBX_0;
-	mcp->tov = 30;
+	mcp->tov = MBX_TOV_SECONDS;
 	mcp->flags = 0;
 	rval = qla2x00_mailbox_command(vha, mcp);
 	if (mb != NULL) {
@@ -5787,7 +5787,7 @@ qla82xx_mbx_intr_enable(scsi_qla_host_t *vha)
 
 	mcp->out_mb = MBX_1|MBX_0;
 	mcp->in_mb = MBX_0;
-	mcp->tov = 30;
+	mcp->tov = MBX_TOV_SECONDS;
 	mcp->flags = 0;
 
 	rval = qla2x00_mailbox_command(vha, mcp);
@@ -5822,7 +5822,7 @@ qla82xx_mbx_intr_disable(scsi_qla_host_t *vha)
 
 	mcp->out_mb = MBX_1|MBX_0;
 	mcp->in_mb = MBX_0;
-	mcp->tov = 30;
+	mcp->tov = MBX_TOV_SECONDS;
 	mcp->flags = 0;
 
 	rval = qla2x00_mailbox_command(vha, mcp);
@@ -6014,7 +6014,7 @@ qla81xx_set_led_config(scsi_qla_host_t *vha, uint16_t *led_cfg)
 	if (IS_QLA8031(ha))
 		mcp->out_mb |= MBX_6|MBX_5|MBX_4|MBX_3;
 	mcp->in_mb = MBX_0;
-	mcp->tov = 30;
+	mcp->tov = MBX_TOV_SECONDS;
 	mcp->flags = 0;
 
 	rval = qla2x00_mailbox_command(vha, mcp);
@@ -6050,7 +6050,7 @@ qla81xx_get_led_config(scsi_qla_host_t *vha, uint16_t *led_cfg)
 	mcp->in_mb = MBX_2|MBX_1|MBX_0;
 	if (IS_QLA8031(ha))
 		mcp->in_mb |= MBX_6|MBX_5|MBX_4|MBX_3;
-	mcp->tov = 30;
+	mcp->tov = MBX_TOV_SECONDS;
 	mcp->flags = 0;
 
 	rval = qla2x00_mailbox_command(vha, mcp);
-- 
GitLab


From d81665198b83e55a28339d1f3e4890ed8a434556 Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Mon, 17 Aug 2020 20:52:06 +0100
Subject: [PATCH 0188/1341] block: Fix page_is_mergeable() for compound pages

If we pass in an offset which is larger than PAGE_SIZE, then
page_is_mergeable() thinks it's not mergeable with the previous bio_vec,
leading to a large number of bio_vecs being used.  Use a slightly more
obvious test that the two pages are compatible with each other.

Fixes: 52d52d1c98a9 ("block: only allow contiguous page structs in a bio_vec")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/bio.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/block/bio.c b/block/bio.c
index c63ba04bd6296..a9931f23d9332 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -740,8 +740,8 @@ static inline bool page_is_mergeable(const struct bio_vec *bv,
 		struct page *page, unsigned int len, unsigned int off,
 		bool *same_page)
 {
-	phys_addr_t vec_end_addr = page_to_phys(bv->bv_page) +
-		bv->bv_offset + bv->bv_len - 1;
+	size_t bv_end = bv->bv_offset + bv->bv_len;
+	phys_addr_t vec_end_addr = page_to_phys(bv->bv_page) + bv_end - 1;
 	phys_addr_t page_addr = page_to_phys(page);
 
 	if (vec_end_addr + 1 != page_addr + off)
@@ -750,9 +750,9 @@ static inline bool page_is_mergeable(const struct bio_vec *bv,
 		return false;
 
 	*same_page = ((vec_end_addr & PAGE_MASK) == page_addr);
-	if (!*same_page && pfn_to_page(PFN_DOWN(vec_end_addr)) + 1 != page)
-		return false;
-	return true;
+	if (*same_page)
+		return true;
+	return (bv->bv_page + bv_end / PAGE_SIZE) == (page + off / PAGE_SIZE);
 }
 
 /*
-- 
GitLab


From 10ae30ba664822f62de169a61628e31c999c7cc8 Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Thu, 6 Aug 2020 04:10:04 -0700
Subject: [PATCH 0189/1341] scsi: qla2xxx: Flush all sessions on zone disable

On Zone Disable, certain switches would ignore all commands. This causes
timeout for both switch scan command and abort of that command. On
detection of this condition, all sessions will be shutdown.

Link: https://lore.kernel.org/r/20200806111014.28434-2-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_gs.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index df670fba2ab8a..c6b6a3250312e 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -3736,6 +3736,18 @@ static void qla2x00_async_gpnft_gnnft_sp_done(srb_t *sp, int res)
 		unsigned long flags;
 		const char *name = sp->name;
 
+		if (res == QLA_OS_TIMER_EXPIRED) {
+			/* switch is ignoring all commands.
+			 * This might be a zone disable behavior.
+			 * This means we hit 64s timeout.
+			 * 22s GPNFT + 44s Abort = 64s
+			 */
+			ql_dbg(ql_dbg_disc, vha, 0xffff,
+			       "%s: Switch Zone check please .\n",
+			       name);
+			qla2x00_mark_all_devices_lost(vha);
+		}
+
 		/*
 		 * We are in an Interrupt context, queue up this
 		 * sp for GNNFT_DONE work. This will allow all
-- 
GitLab


From a117579d0205b5a0592a3a98493e2b875e4da236 Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Thu, 6 Aug 2020 04:10:05 -0700
Subject: [PATCH 0190/1341] scsi: qla2xxx: Flush I/O on zone disable

Perform implicit logout to flush I/O on zone disable.

Link: https://lore.kernel.org/r/20200806111014.28434-3-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_gs.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index c6b6a3250312e..7074073446701 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -3436,7 +3436,6 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp)
 			list_for_each_entry(fcport, &vha->vp_fcports, list) {
 				if ((fcport->flags & FCF_FABRIC_DEVICE) != 0) {
 					fcport->scan_state = QLA_FCPORT_SCAN;
-					fcport->logout_on_delete = 0;
 				}
 			}
 			goto login_logout;
-- 
GitLab


From 4709272f6327cc4a8ee1dc55771bcf9718346980 Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Thu, 6 Aug 2020 04:10:06 -0700
Subject: [PATCH 0191/1341] scsi: qla2xxx: Indicate correct supported speeds
 for Mezz card

Correct the supported speeds for 16G Mezz card.

Link: https://lore.kernel.org/r/20200806111014.28434-4-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_gs.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index 7074073446701..3bfb5678f6515 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -1505,11 +1505,11 @@ qla2x00_prep_ct_fdmi_req(struct ct_sns_pkt *p, uint16_t cmd,
 static uint
 qla25xx_fdmi_port_speed_capability(struct qla_hw_data *ha)
 {
+	uint speeds = 0;
+
 	if (IS_CNA_CAPABLE(ha))
 		return FDMI_PORT_SPEED_10GB;
 	if (IS_QLA28XX(ha) || IS_QLA27XX(ha)) {
-		uint speeds = 0;
-
 		if (ha->max_supported_speed == 2) {
 			if (ha->min_supported_speed <= 6)
 				speeds |= FDMI_PORT_SPEED_64GB;
@@ -1536,9 +1536,16 @@ qla25xx_fdmi_port_speed_capability(struct qla_hw_data *ha)
 		}
 		return speeds;
 	}
-	if (IS_QLA2031(ha))
-		return FDMI_PORT_SPEED_16GB|FDMI_PORT_SPEED_8GB|
-			FDMI_PORT_SPEED_4GB;
+	if (IS_QLA2031(ha)) {
+		if ((ha->pdev->subsystem_vendor == 0x103C) &&
+		    (ha->pdev->subsystem_device == 0x8002)) {
+			speeds = FDMI_PORT_SPEED_16GB;
+		} else {
+			speeds = FDMI_PORT_SPEED_16GB|FDMI_PORT_SPEED_8GB|
+				FDMI_PORT_SPEED_4GB;
+		}
+		return speeds;
+	}
 	if (IS_QLA25XX(ha))
 		return FDMI_PORT_SPEED_8GB|FDMI_PORT_SPEED_4GB|
 			FDMI_PORT_SPEED_2GB|FDMI_PORT_SPEED_1GB;
-- 
GitLab


From abb31aeaa9b20680b0620b23fea5475ea4591e31 Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Thu, 6 Aug 2020 04:10:07 -0700
Subject: [PATCH 0192/1341] scsi: qla2xxx: Fix login timeout

Multipath errors were seen during failback due to login timeout.  The
remote device sent LOGO, the local host tore down the session and did
relogin. The RSCN arrived indicates remote device is going through failover
after which the relogin is in a 20s timeout phase.  At this point the
driver is stuck in the relogin process.  Add a fix to delete the session as
part of abort/flush the login.

Link: https://lore.kernel.org/r/20200806111014.28434-5-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_gs.c     | 18 +++++++++++++++---
 drivers/scsi/qla2xxx/qla_target.c |  2 +-
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index 3bfb5678f6515..de9fd7f688d01 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -3538,10 +3538,22 @@ void qla24xx_async_gnnft_done(scsi_qla_host_t *vha, srb_t *sp)
 		}
 
 		if (fcport->scan_state != QLA_FCPORT_FOUND) {
+			bool do_delete = false;
+
+			if (fcport->scan_needed &&
+			    fcport->disc_state == DSC_LOGIN_PEND) {
+				/* Cable got disconnected after we sent
+				 * a login. Do delete to prevent timeout.
+				 */
+				fcport->logout_on_delete = 1;
+				do_delete = true;
+			}
+
 			fcport->scan_needed = 0;
-			if ((qla_dual_mode_enabled(vha) ||
-				qla_ini_mode_enabled(vha)) &&
-			    atomic_read(&fcport->state) == FCS_ONLINE) {
+			if (((qla_dual_mode_enabled(vha) ||
+			      qla_ini_mode_enabled(vha)) &&
+			    atomic_read(&fcport->state) == FCS_ONLINE) ||
+				do_delete) {
 				if (fcport->loop_id != FC_NO_LOOP_ID) {
 					if (fcport->flags & FCF_FCP2_DEVICE)
 						fcport->logout_on_delete = 0;
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index fbb80a043b4fe..90289162dbd4c 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -1270,7 +1270,7 @@ void qlt_schedule_sess_for_deletion(struct fc_port *sess)
 
 	qla24xx_chk_fcp_state(sess);
 
-	ql_dbg(ql_dbg_tgt, sess->vha, 0xe001,
+	ql_dbg(ql_dbg_disc, sess->vha, 0xe001,
 	    "Scheduling sess %p for deletion %8phC\n",
 	    sess, sess->port_name);
 
-- 
GitLab


From 81b9d1e19d62bf876c3985dbaf53a3a50eedd74b Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Thu, 6 Aug 2020 04:10:08 -0700
Subject: [PATCH 0193/1341] scsi: qla2xxx: Reduce noisy debug message

Update debug level and message for ELS IOCB done.

Link: https://lore.kernel.org/r/20200806111014.28434-6-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_isr.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 27bcd346af7c2..ab5275dbc3389 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -2024,8 +2024,8 @@ qla24xx_els_ct_entry(scsi_qla_host_t *vha, struct req_que *req,
 				res = DID_ERROR << 16;
 			}
 		}
-		ql_dbg(ql_dbg_user, vha, 0x503f,
-		    "ELS IOCB Done -%s error hdl=%x comp_status=0x%x error subcode 1=0x%x error subcode 2=0x%x total_byte=0x%x\n",
+		ql_dbg(ql_dbg_disc, vha, 0x503f,
+		    "ELS IOCB Done -%s hdl=%x comp_status=0x%x error subcode 1=0x%x error subcode 2=0x%x total_byte=0x%x\n",
 		    type, sp->handle, comp_status, fw_status[1], fw_status[2],
 		    le32_to_cpu(ese->total_byte_count));
 		goto els_ct_done;
-- 
GitLab


From 49030003a38a5e3688781e2ccf9550dcebf61282 Mon Sep 17 00:00:00 2001
From: Arun Easi <aeasi@marvell.com>
Date: Thu, 6 Aug 2020 04:10:09 -0700
Subject: [PATCH 0194/1341] scsi: qla2xxx: Allow ql2xextended_error_logging
 special value 1 to be set anytime

ql2xextended_error_logging can now be set to 1 to get the default mask
value, as opposed to at module load time only.

Link: https://lore.kernel.org/r/20200806111014.28434-7-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_dbg.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_dbg.h b/drivers/scsi/qla2xxx/qla_dbg.h
index 91eb6901815c9..e1d7de63e8f87 100644
--- a/drivers/scsi/qla2xxx/qla_dbg.h
+++ b/drivers/scsi/qla2xxx/qla_dbg.h
@@ -380,5 +380,8 @@ extern int qla24xx_soft_reset(struct qla_hw_data *);
 static inline int
 ql_mask_match(uint level)
 {
+	if (ql2xextended_error_logging == 1)
+		ql2xextended_error_logging = QL_DBG_DEFAULT1_MASK;
+
 	return (level & ql2xextended_error_logging) == level;
 }
-- 
GitLab


From 897d68eb816bfae5ad9e870f68350dbb599d6e0e Mon Sep 17 00:00:00 2001
From: Arun Easi <aeasi@marvell.com>
Date: Thu, 6 Aug 2020 04:10:10 -0700
Subject: [PATCH 0195/1341] scsi: qla2xxx: Fix WARN_ON in qla_nvme_register_hba

qla_nvme_register_hba() puts out a warning when there are not enough queue
pairs available for FC-NVME.  Just fail the NVME registration rather than a
WARNING + call Trace.

Link: https://lore.kernel.org/r/20200806111014.28434-8-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_def.h  |  1 +
 drivers/scsi/qla2xxx/qla_nvme.c | 10 +++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 8c92af5e43909..1bc090d8a71b0 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -3880,6 +3880,7 @@ struct qla_hw_data {
 		uint32_t	scm_supported_f:1;
 				/* Enabled in Driver */
 		uint32_t	scm_enabled:1;
+		uint32_t	max_req_queue_warned:1;
 	} flags;
 
 	uint16_t max_exchg;
diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index fa695a4007f86..2722ffc1788f6 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -687,7 +687,15 @@ int qla_nvme_register_hba(struct scsi_qla_host *vha)
 	tmpl = &qla_nvme_fc_transport;
 
 	WARN_ON(vha->nvme_local_port);
-	WARN_ON(ha->max_req_queues < 3);
+
+	if (ha->max_req_queues < 3) {
+		if (!ha->flags.max_req_queue_warned)
+			ql_log(ql_log_info, vha, 0x2120,
+			       "%s: Disabling FC-NVME due to lack of free queue pairs (%d).\n",
+			       __func__, ha->max_req_queues);
+		ha->flags.max_req_queue_warned = 1;
+		return ret;
+	}
 
 	qla_nvme_fc_transport.max_hw_queues =
 	    min((uint8_t)(qla_nvme_fc_transport.max_hw_queues),
-- 
GitLab


From dffa11453313a115157b19021cc2e27ea98e624c Mon Sep 17 00:00:00 2001
From: Saurav Kashyap <skashyap@marvell.com>
Date: Thu, 6 Aug 2020 04:10:11 -0700
Subject: [PATCH 0196/1341] scsi: qla2xxx: Check if FW supports MQ before
 enabling

OS boot during Boot from SAN was stuck at dracut emergency shell after
enabling NVMe driver parameter. For non-MQ support the driver was enabling
MQ. Add a check to confirm if FW supports MQ.

Link: https://lore.kernel.org/r/20200806111014.28434-9-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_os.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 9b59f032a569b..fda812b9b564c 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2017,6 +2017,11 @@ qla2x00_iospace_config(struct qla_hw_data *ha)
 	/* Determine queue resources */
 	ha->max_req_queues = ha->max_rsp_queues = 1;
 	ha->msix_count = QLA_BASE_VECTORS;
+
+	/* Check if FW supports MQ or not */
+	if (!(ha->fw_attributes & BIT_6))
+		goto mqiobase_exit;
+
 	if (!ql2xmqsupport || !ql2xnvmeenable ||
 	    (!IS_QLA25XX(ha) && !IS_QLA81XX(ha)))
 		goto mqiobase_exit;
-- 
GitLab


From 83949613fac61e8e37eadf8275bf072342302f4e Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Thu, 6 Aug 2020 04:10:12 -0700
Subject: [PATCH 0197/1341] scsi: qla2xxx: Fix null pointer access during
 disconnect from subsystem

NVMEAsync command is being submitted to QLA while the same NVMe controller
is in the middle of reset. The reset path has deleted the association and
freed aen_op->fcp_req.private. Add a check for this private pointer before
issuing the command.

...
 6 [ffffb656ca11fce0] page_fault at ffffffff8c00114e
    [exception RIP: qla_nvme_post_cmd+394]
    RIP: ffffffffc0d012ba  RSP: ffffb656ca11fd98  RFLAGS: 00010206
    RAX: ffff8fb039eda228  RBX: ffff8fb039eda200  RCX: 00000000000da161
    RDX: ffffffffc0d4d0f0  RSI: ffffffffc0d26c9b  RDI: ffff8fb039eda220
    RBP: 0000000000000013   R8: ffff8fb47ff6aa80   R9: 0000000000000002
    R10: 0000000000000000  R11: ffffb656ca11fdc8  R12: ffff8fb27d04a3b0
    R13: ffff8fc46dd98a58  R14: 0000000000000000  R15: ffff8fc4540f0000
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 7 [ffffb656ca11fe08] nvme_fc_start_fcp_op at ffffffffc0241568 [nvme_fc]
 8 [ffffb656ca11fe50] nvme_fc_submit_async_event at ffffffffc0241901 [nvme_fc]
 9 [ffffb656ca11fe68] nvme_async_event_work at ffffffffc014543d [nvme_core]
10 [ffffb656ca11fe98] process_one_work at ffffffff8b6cd437
11 [ffffb656ca11fed8] worker_thread at ffffffff8b6cdcef
12 [ffffb656ca11ff10] kthread at ffffffff8b6d3402
13 [ffffb656ca11ff50] ret_from_fork at ffffffff8c000255

--
PID: 37824  TASK: ffff8fb033063d80  CPU: 20  COMMAND: "kworker/u97:451"
 0 [ffffb656ce1abc28] __schedule at ffffffff8be629e3
 1 [ffffb656ce1abcc8] schedule at ffffffff8be62fe8
 2 [ffffb656ce1abcd0] schedule_timeout at ffffffff8be671ed
 3 [ffffb656ce1abd70] wait_for_completion at ffffffff8be639cf
 4 [ffffb656ce1abdd0] flush_work at ffffffff8b6ce2d5
 5 [ffffb656ce1abe70] nvme_stop_ctrl at ffffffffc0144900 [nvme_core]
 6 [ffffb656ce1abe80] nvme_fc_reset_ctrl_work at ffffffffc0243445 [nvme_fc]
 7 [ffffb656ce1abe98] process_one_work at ffffffff8b6cd437
 8 [ffffb656ce1abed8] worker_thread at ffffffff8b6cdb50
 9 [ffffb656ce1abf10] kthread at ffffffff8b6d3402
10 [ffffb656ce1abf50] ret_from_fork at ffffffff8c000255

Link: https://lore.kernel.org/r/20200806111014.28434-10-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_nvme.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/scsi/qla2xxx/qla_nvme.c b/drivers/scsi/qla2xxx/qla_nvme.c
index 2722ffc1788f6..90bbc61f361b9 100644
--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -536,6 +536,11 @@ static int qla_nvme_post_cmd(struct nvme_fc_local_port *lport,
 	struct nvme_private *priv = fd->private;
 	struct qla_nvme_rport *qla_rport = rport->private;
 
+	if (!priv) {
+		/* nvme association has been torn down */
+		return rval;
+	}
+
 	fcport = qla_rport->fcport;
 
 	if (!qpair || !fcport || (qpair && !qpair->fw_started) ||
-- 
GitLab


From de7e6194301ad31c4ce95395eb678e51a1b907e5 Mon Sep 17 00:00:00 2001
From: Saurav Kashyap <skashyap@marvell.com>
Date: Thu, 6 Aug 2020 04:10:13 -0700
Subject: [PATCH 0198/1341] Revert "scsi: qla2xxx: Fix crash on
 qla2x00_mailbox_command"

FCoE adapter initialization failed for ISP8021 with the following patch
applied. In addition, reproduction of the issue the patch originally tried
to address has been unsuccessful.

This reverts commit 3cb182b3fa8b7a61f05c671525494697cba39c6a.

Link: https://lore.kernel.org/r/20200806111014.28434-11-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_mbx.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index 77e1e24125cab..226f1428d3e52 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -334,14 +334,6 @@ qla2x00_mailbox_command(scsi_qla_host_t *vha, mbx_cmd_t *mcp)
 			if (time_after(jiffies, wait_time))
 				break;
 
-			/*
-			 * Check if it's UNLOADING, cause we cannot poll in
-			 * this case, or else a NULL pointer dereference
-			 * is triggered.
-			 */
-			if (unlikely(test_bit(UNLOADING, &base_vha->dpc_flags)))
-				return QLA_FUNCTION_TIMEOUT;
-
 			/* Check for pending interrupts. */
 			qla2x00_poll(ha->rsp_q_map[0]);
 
-- 
GitLab


From dca93232b361d260413933903cd4bdbd92ebcc7f Mon Sep 17 00:00:00 2001
From: Quinn Tran <qutran@marvell.com>
Date: Thu, 6 Aug 2020 04:10:14 -0700
Subject: [PATCH 0199/1341] Revert "scsi: qla2xxx: Disable T10-DIF feature with
 FC-NVMe during probe"

FCP T10-PI and NVMe features are independent of each other. This patch
allows both features to co-exist.

This reverts commit 5da05a26b8305a625bc9d537671b981795b46dab.

Link: https://lore.kernel.org/r/20200806111014.28434-12-njavali@marvell.com
Fixes: 5da05a26b830 ("scsi: qla2xxx: Disable T10-DIF feature with FC-NVMe during probe")
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_os.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index fda812b9b564c..8da00ba54aec6 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -2834,10 +2834,6 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	/* This may fail but that's ok */
 	pci_enable_pcie_error_reporting(pdev);
 
-	/* Turn off T10-DIF when FC-NVMe is enabled */
-	if (ql2xnvmeenable)
-		ql2xenabledif = 0;
-
 	ha = kzalloc(sizeof(struct qla_hw_data), GFP_KERNEL);
 	if (!ha) {
 		ql_log_pci(ql_log_fatal, pdev, 0x0009,
-- 
GitLab


From 48d2f0407be7a36e8f20be37ec9121e021ef3964 Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@csgroup.eu>
Date: Wed, 5 Aug 2020 15:27:29 +0000
Subject: [PATCH 0200/1341] powerpc/kasan: Fix KASAN_SHADOW_START on BOOK3S_32

On BOOK3S_32, when we have modules and strict kernel RWX, modules
are not in vmalloc space but in a dedicated segment that is
below PAGE_OFFSET.

So KASAN_SHADOW_START must take it into account.

MODULES_VADDR can't be used because it is not defined yet
in kasan.h

Fixes: 6ca055322da8 ("powerpc/32s: Use dedicated segment for modules with STRICT_KERNEL_RWX")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/6eddca2d5611fd57312a88eae31278c87a8fc99d.1596641224.git.christophe.leroy@csgroup.eu
---
 arch/powerpc/include/asm/kasan.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
index d635b96c7ea69..7355ed05e65ed 100644
--- a/arch/powerpc/include/asm/kasan.h
+++ b/arch/powerpc/include/asm/kasan.h
@@ -15,11 +15,18 @@
 #ifndef __ASSEMBLY__
 
 #include <asm/page.h>
+#include <linux/sizes.h>
 
 #define KASAN_SHADOW_SCALE_SHIFT	3
 
+#if defined(CONFIG_PPC_BOOK3S_32) && defined(CONFIG_MODULES) && defined(CONFIG_STRICT_KERNEL_RWX)
+#define KASAN_KERN_START	ALIGN_DOWN(PAGE_OFFSET - SZ_256M, SZ_256M)
+#else
+#define KASAN_KERN_START	PAGE_OFFSET
+#endif
+
 #define KASAN_SHADOW_START	(KASAN_SHADOW_OFFSET + \
-				 (PAGE_OFFSET >> KASAN_SHADOW_SCALE_SHIFT))
+				 (KASAN_KERN_START >> KASAN_SHADOW_SCALE_SHIFT))
 
 #define KASAN_SHADOW_OFFSET	ASM_CONST(CONFIG_KASAN_SHADOW_OFFSET)
 
-- 
GitLab


From 7bee31ad8e2f6c276f36993346ac70f4d4c80e45 Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@csgroup.eu>
Date: Wed, 5 Aug 2020 15:27:28 +0000
Subject: [PATCH 0201/1341] powerpc/32s: Fix is_module_segment() when
 MODULES_VADDR is defined

When MODULES_VADDR is defined, is_module_segment() shall check the
address against it instead of checking agains VMALLOC_START.

Fixes: 6ca055322da8 ("powerpc/32s: Use dedicated segment for modules with STRICT_KERNEL_RWX")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/07884ed033c31e074747b7eb8eaa329d15db07ec.1596641219.git.christophe.leroy@csgroup.eu
---
 arch/powerpc/mm/book3s32/mmu.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/powerpc/mm/book3s32/mmu.c b/arch/powerpc/mm/book3s32/mmu.c
index c0162911f6cbd..82ae9e06a7732 100644
--- a/arch/powerpc/mm/book3s32/mmu.c
+++ b/arch/powerpc/mm/book3s32/mmu.c
@@ -191,10 +191,17 @@ static bool is_module_segment(unsigned long addr)
 {
 	if (!IS_ENABLED(CONFIG_MODULES))
 		return false;
+#ifdef MODULES_VADDR
+	if (addr < ALIGN_DOWN(MODULES_VADDR, SZ_256M))
+		return false;
+	if (addr >= ALIGN(MODULES_END, SZ_256M))
+		return false;
+#else
 	if (addr < ALIGN_DOWN(VMALLOC_START, SZ_256M))
 		return false;
 	if (addr >= ALIGN(VMALLOC_END, SZ_256M))
 		return false;
+#endif
 	return true;
 }
 
-- 
GitLab


From 801980f6497946048709b9b09771a1729551d705 Mon Sep 17 00:00:00 2001
From: Michael Roth <mdroth@linux.vnet.ibm.com>
Date: Tue, 11 Aug 2020 11:15:44 -0500
Subject: [PATCH 0202/1341] powerpc/pseries/hotplug-cpu: wait indefinitely for
 vCPU death

For a power9 KVM guest with XIVE enabled, running a test loop
where we hotplug 384 vcpus and then unplug them, the following traces
can be seen (generally within a few loops) either from the unplugged
vcpu:

  cpu 65 (hwid 65) Ready to die...
  Querying DEAD? cpu 66 (66) shows 2
  list_del corruption. next->prev should be c00a000002470208, but was c00a000002470048
  ------------[ cut here ]------------
  kernel BUG at lib/list_debug.c:56!
  Oops: Exception in kernel mode, sig: 5 [#1]
  LE SMP NR_CPUS=2048 NUMA pSeries
  Modules linked in: fuse nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 ...
  CPU: 66 PID: 0 Comm: swapper/66 Kdump: loaded Not tainted 4.18.0-221.el8.ppc64le #1
  NIP:  c0000000007ab50c LR: c0000000007ab508 CTR: 00000000000003ac
  REGS: c0000009e5a17840 TRAP: 0700   Not tainted  (4.18.0-221.el8.ppc64le)
  MSR:  800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>  CR: 28000842  XER: 20040000
  ...
  NIP __list_del_entry_valid+0xac/0x100
  LR  __list_del_entry_valid+0xa8/0x100
  Call Trace:
    __list_del_entry_valid+0xa8/0x100 (unreliable)
    free_pcppages_bulk+0x1f8/0x940
    free_unref_page+0xd0/0x100
    xive_spapr_cleanup_queue+0x148/0x1b0
    xive_teardown_cpu+0x1bc/0x240
    pseries_mach_cpu_die+0x78/0x2f0
    cpu_die+0x48/0x70
    arch_cpu_idle_dead+0x20/0x40
    do_idle+0x2f4/0x4c0
    cpu_startup_entry+0x38/0x40
    start_secondary+0x7bc/0x8f0
    start_secondary_prolog+0x10/0x14

or on the worker thread handling the unplug:

  pseries-hotplug-cpu: Attempting to remove CPU <NULL>, drc index: 1000013a
  Querying DEAD? cpu 314 (314) shows 2
  BUG: Bad page state in process kworker/u768:3  pfn:95de1
  cpu 314 (hwid 314) Ready to die...
  page:c00a000002577840 refcount:0 mapcount:-128 mapping:0000000000000000 index:0x0
  flags: 0x5ffffc00000000()
  raw: 005ffffc00000000 5deadbeef0000100 5deadbeef0000200 0000000000000000
  raw: 0000000000000000 0000000000000000 00000000ffffff7f 0000000000000000
  page dumped because: nonzero mapcount
  Modules linked in: kvm xt_CHECKSUM ipt_MASQUERADE xt_conntrack ...
  CPU: 0 PID: 548 Comm: kworker/u768:3 Kdump: loaded Not tainted 4.18.0-224.el8.bz1856588.ppc64le #1
  Workqueue: pseries hotplug workque pseries_hp_work_fn
  Call Trace:
    dump_stack+0xb0/0xf4 (unreliable)
    bad_page+0x12c/0x1b0
    free_pcppages_bulk+0x5bc/0x940
    page_alloc_cpu_dead+0x118/0x120
    cpuhp_invoke_callback.constprop.5+0xb8/0x760
    _cpu_down+0x188/0x340
    cpu_down+0x5c/0xa0
    cpu_subsys_offline+0x24/0x40
    device_offline+0xf0/0x130
    dlpar_offline_cpu+0x1c4/0x2a0
    dlpar_cpu_remove+0xb8/0x190
    dlpar_cpu_remove_by_index+0x12c/0x150
    dlpar_cpu+0x94/0x800
    pseries_hp_work_fn+0x128/0x1e0
    process_one_work+0x304/0x5d0
    worker_thread+0xcc/0x7a0
    kthread+0x1ac/0x1c0
    ret_from_kernel_thread+0x5c/0x80

The latter trace is due to the following sequence:

  page_alloc_cpu_dead
    drain_pages
      drain_pages_zone
        free_pcppages_bulk

where drain_pages() in this case is called under the assumption that
the unplugged cpu is no longer executing. To ensure that is the case,
and early call is made to __cpu_die()->pseries_cpu_die(), which runs a
loop that waits for the cpu to reach a halted state by polling its
status via query-cpu-stopped-state RTAS calls. It only polls for 25
iterations before giving up, however, and in the trace above this
results in the following being printed only .1 seconds after the
hotplug worker thread begins processing the unplug request:

  pseries-hotplug-cpu: Attempting to remove CPU <NULL>, drc index: 1000013a
  Querying DEAD? cpu 314 (314) shows 2

At that point the worker thread assumes the unplugged CPU is in some
unknown/dead state and procedes with the cleanup, causing the race
with the XIVE cleanup code executed by the unplugged CPU.

Fix this by waiting indefinitely, but also making an effort to avoid
spurious lockup messages by allowing for rescheduling after polling
the CPU status and printing a warning if we wait for longer than 120s.

Fixes: eac1e731b59ee ("powerpc/xive: guest exploitation of the XIVE interrupt controller")
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Tested-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
[mpe: Trim oopses in change log slightly for readability]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200811161544.10513-1-mdroth@linux.vnet.ibm.com
---
 arch/powerpc/platforms/pseries/hotplug-cpu.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index c6e0d8abf75ea..7a974ed6b2400 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -107,22 +107,28 @@ static int pseries_cpu_disable(void)
  */
 static void pseries_cpu_die(unsigned int cpu)
 {
-	int tries;
 	int cpu_status = 1;
 	unsigned int pcpu = get_hard_smp_processor_id(cpu);
+	unsigned long timeout = jiffies + msecs_to_jiffies(120000);
 
-	for (tries = 0; tries < 25; tries++) {
+	while (true) {
 		cpu_status = smp_query_cpu_stopped(pcpu);
 		if (cpu_status == QCSS_STOPPED ||
 		    cpu_status == QCSS_HARDWARE_ERROR)
 			break;
-		cpu_relax();
 
+		if (time_after(jiffies, timeout)) {
+			pr_warn("CPU %i (hwid %i) didn't die after 120 seconds\n",
+				cpu, pcpu);
+			timeout = jiffies + msecs_to_jiffies(120000);
+		}
+
+		cond_resched();
 	}
 
-	if (cpu_status != 0) {
-		printk("Querying DEAD? cpu %i (%i) shows %i\n",
-		       cpu, pcpu, cpu_status);
+	if (cpu_status == QCSS_HARDWARE_ERROR) {
+		pr_warn("CPU %i (hwid %i) reported error while dying\n",
+			cpu, pcpu);
 	}
 
 	/* Isolation and deallocation are definitely done by
-- 
GitLab


From f176ede3a3bde5b398a6777a7f9ff091baa2d3ff Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@rowland.harvard.edu>
Date: Mon, 10 Aug 2020 14:29:54 -0400
Subject: [PATCH 0203/1341] USB: yurex: Fix bad gfp argument

The syzbot fuzzer identified a bug in the yurex driver: It passes
GFP_KERNEL as a memory-allocation flag to usb_submit_urb() at a time
when its state is TASK_INTERRUPTIBLE, not TASK_RUNNING:

do not call blocking ops when !TASK_RUNNING; state=1 set at [<00000000370c7c68>] prepare_to_wait+0xb1/0x2a0 kernel/sched/wait.c:247
WARNING: CPU: 1 PID: 340 at kernel/sched/core.c:7253 __might_sleep+0x135/0x190
kernel/sched/core.c:7253
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 340 Comm: syz-executor677 Not tainted 5.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google
01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf6/0x16e lib/dump_stack.c:118
 panic+0x2aa/0x6e1 kernel/panic.c:231
 __warn.cold+0x20/0x50 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x41/0x80 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:__might_sleep+0x135/0x190 kernel/sched/core.c:7253
Code: 65 48 8b 1c 25 40 ef 01 00 48 8d 7b 10 48 89 fe 48 c1 ee 03 80 3c 06 00 75
2b 48 8b 73 10 48 c7 c7 e0 9e 06 86 e8 ed 12 f6 ff <0f> 0b e9 46 ff ff ff e8 1f
b2 4b 00 e9 29 ff ff ff e8 15 b2 4b 00
RSP: 0018:ffff8881cdb77a28 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff8881c6458000 RCX: 0000000000000000
RDX: ffff8881c6458000 RSI: ffffffff8129ec93 RDI: ffffed1039b6ef37
RBP: ffffffff86fdade2 R08: 0000000000000001 R09: ffff8881db32f54f
R10: 0000000000000000 R11: 0000000030343354 R12: 00000000000001f2
R13: 0000000000000000 R14: 0000000000000068 R15: ffffffff83c1b1aa
 slab_pre_alloc_hook.constprop.0+0xea/0x200 mm/slab.h:498
 slab_alloc_node mm/slub.c:2816 [inline]
 slab_alloc mm/slub.c:2900 [inline]
 kmem_cache_alloc_trace+0x46/0x220 mm/slub.c:2917
 kmalloc include/linux/slab.h:554 [inline]
 dummy_urb_enqueue+0x7a/0x880 drivers/usb/gadget/udc/dummy_hcd.c:1251
 usb_hcd_submit_urb+0x2b2/0x22d0 drivers/usb/core/hcd.c:1547
 usb_submit_urb+0xb4e/0x13e0 drivers/usb/core/urb.c:570
 yurex_write+0x3ea/0x820 drivers/usb/misc/yurex.c:495

This patch changes the call to use GFP_ATOMIC instead of GFP_KERNEL.

Reported-and-tested-by: syzbot+c2c3302f9c601a4b1be2@syzkaller.appspotmail.com
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200810182954.GB307778@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/misc/yurex.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/misc/yurex.c b/drivers/usb/misc/yurex.c
index 6e7d34e7fec43..b2e09883c7e2a 100644
--- a/drivers/usb/misc/yurex.c
+++ b/drivers/usb/misc/yurex.c
@@ -492,7 +492,7 @@ static ssize_t yurex_write(struct file *file, const char __user *user_buffer,
 	prepare_to_wait(&dev->waitq, &wait, TASK_INTERRUPTIBLE);
 	dev_dbg(&dev->interface->dev, "%s - submit %c\n", __func__,
 		dev->cntl_buffer[0]);
-	retval = usb_submit_urb(dev->cntl_urb, GFP_KERNEL);
+	retval = usb_submit_urb(dev->cntl_urb, GFP_ATOMIC);
 	if (retval >= 0)
 		timeout = schedule_timeout(YUREX_WRITE_TIMEOUT);
 	finish_wait(&dev->waitq, &wait);
-- 
GitLab


From 5967116e8358899ebaa22702d09b0af57fef23e1 Mon Sep 17 00:00:00 2001
From: Kai-Heng Feng <kai.heng.feng@canonical.com>
Date: Fri, 31 Jul 2020 13:16:20 +0800
Subject: [PATCH 0204/1341] USB: quirks: Add no-lpm quirk for another Raydium
 touchscreen

There's another Raydium touchscreen needs the no-lpm quirk:
[    1.339149] usb 1-9: New USB device found, idVendor=2386, idProduct=350e, bcdDevice= 0.00
[    1.339150] usb 1-9: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[    1.339151] usb 1-9: Product: Raydium Touch System
[    1.339152] usb 1-9: Manufacturer: Raydium Corporation
...
[    6.450497] usb 1-9: can't set config #1, error -110

BugLink: https://bugs.launchpad.net/bugs/1889446
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200731051622.28643-1-kai.heng.feng@canonical.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/quirks.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index 7c1198f80c231..d1f38956b210e 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -465,6 +465,8 @@ static const struct usb_device_id usb_quirk_list[] = {
 
 	{ USB_DEVICE(0x2386, 0x3119), .driver_info = USB_QUIRK_NO_LPM },
 
+	{ USB_DEVICE(0x2386, 0x350e), .driver_info = USB_QUIRK_NO_LPM },
+
 	/* DJI CineSSD */
 	{ USB_DEVICE(0x2ca3, 0x0031), .driver_info = USB_QUIRK_NO_LPM },
 
-- 
GitLab


From f4b9d8a582f738c24ebeabce5cc15f4b8159d74e Mon Sep 17 00:00:00 2001
From: Tom Rix <trix@redhat.com>
Date: Sat, 1 Aug 2020 08:21:54 -0700
Subject: [PATCH 0205/1341] USB: cdc-acm: rework notification_buffer resizing

Clang static analysis reports this error

cdc-acm.c:409:3: warning: Use of memory after it is freed
        acm_process_notification(acm, (unsigned char *)dr);

There are three problems, the first one is that dr is not reset

The variable dr is set with

if (acm->nb_index)
	dr = (struct usb_cdc_notification *)acm->notification_buffer;

But if the notification_buffer is too small it is resized with

		if (acm->nb_size) {
			kfree(acm->notification_buffer);
			acm->nb_size = 0;
		}
		alloc_size = roundup_pow_of_two(expected_size);
		/*
		 * kmalloc ensures a valid notification_buffer after a
		 * use of kfree in case the previous allocation was too
		 * small. Final freeing is done on disconnect.
		 */
		acm->notification_buffer =
			kmalloc(alloc_size, GFP_ATOMIC);

dr should point to the new acm->notification_buffer.

The second problem is any data in the notification_buffer is lost
when the pointer is freed.  In the normal case, the current data
is accumulated in the notification_buffer here.

	memcpy(&acm->notification_buffer[acm->nb_index],
	       urb->transfer_buffer, copy_size);

When a resize happens, anything before
notification_buffer[acm->nb_index] is garbage.

The third problem is the acm->nb_index is not reset on a
resizing buffer error.

So switch resizing to using krealloc and reassign dr and
reset nb_index.

Fixes: ea2583529cd1 ("cdc-acm: reassemble fragmented notifications")
Signed-off-by: Tom Rix <trix@redhat.com>
Cc: stable <stable@vger.kernel.org>
Acked-by: Oliver Neukum <oneukum@suse.com>
Link: https://lore.kernel.org/r/20200801152154.20683-1-trix@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/class/cdc-acm.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 991786876dbb3..7f6f3ab5b8a67 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -378,21 +378,19 @@ static void acm_ctrl_irq(struct urb *urb)
 	if (current_size < expected_size) {
 		/* notification is transmitted fragmented, reassemble */
 		if (acm->nb_size < expected_size) {
-			if (acm->nb_size) {
-				kfree(acm->notification_buffer);
-				acm->nb_size = 0;
-			}
+			u8 *new_buffer;
 			alloc_size = roundup_pow_of_two(expected_size);
-			/*
-			 * kmalloc ensures a valid notification_buffer after a
-			 * use of kfree in case the previous allocation was too
-			 * small. Final freeing is done on disconnect.
-			 */
-			acm->notification_buffer =
-				kmalloc(alloc_size, GFP_ATOMIC);
-			if (!acm->notification_buffer)
+			/* Final freeing is done on disconnect. */
+			new_buffer = krealloc(acm->notification_buffer,
+					      alloc_size, GFP_ATOMIC);
+			if (!new_buffer) {
+				acm->nb_index = 0;
 				goto exit;
+			}
+
+			acm->notification_buffer = new_buffer;
 			acm->nb_size = alloc_size;
+			dr = (struct usb_cdc_notification *)acm->notification_buffer;
 		}
 
 		copy_size = min(current_size,
-- 
GitLab


From 531412492ce93ea29b9ca3b4eb5e3ed771f851dd Mon Sep 17 00:00:00 2001
From: Evgeny Novikov <novikov@ispras.ru>
Date: Wed, 5 Aug 2020 12:06:43 +0300
Subject: [PATCH 0206/1341] USB: lvtest: return proper error code in probe

lvs_rh_probe() can return some nonnegative value from usb_control_msg()
when it is less than "USB_DT_HUB_NONVAR_SIZE + 2" that is considered as
a failure. Make lvs_rh_probe() return -EINVAL in this case.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200805090643.3432-1-novikov@ispras.ru
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/misc/lvstest.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/misc/lvstest.c b/drivers/usb/misc/lvstest.c
index 407fe7570f3bc..f8686139d6f39 100644
--- a/drivers/usb/misc/lvstest.c
+++ b/drivers/usb/misc/lvstest.c
@@ -426,7 +426,7 @@ static int lvs_rh_probe(struct usb_interface *intf,
 			USB_DT_SS_HUB_SIZE, USB_CTRL_GET_TIMEOUT);
 	if (ret < (USB_DT_HUB_NONVAR_SIZE + 2)) {
 		dev_err(&hdev->dev, "wrong root hub descriptor read %d\n", ret);
-		return ret;
+		return ret < 0 ? ret : -EINVAL;
 	}
 
 	/* submit urb to poll interrupt endpoint */
-- 
GitLab


From d66a57be2f9a315fc10d0f524f670fec903e0fb4 Mon Sep 17 00:00:00 2001
From: Vinod Koul <vkoul@kernel.org>
Date: Tue, 18 Aug 2020 12:47:39 +0530
Subject: [PATCH 0207/1341] usb: renesas-xhci: remove version check

Some devices in wild are reporting bunch of firmware versions, so remove
the check for versions in driver

Reported by: Anastasios Vacharakis <vacharakis@gmail.com>
Reported by: Glen Journeay <journeay@gmail.com>
Fixes: 2478be82de44 ("usb: renesas-xhci: Add ROM loader for uPD720201")
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=208911
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200818071739.789720-1-vkoul@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci-pci-renesas.c | 19 +------------------
 1 file changed, 1 insertion(+), 18 deletions(-)

diff --git a/drivers/usb/host/xhci-pci-renesas.c b/drivers/usb/host/xhci-pci-renesas.c
index 59b1965ad0a3f..f97ac9f52bf4d 100644
--- a/drivers/usb/host/xhci-pci-renesas.c
+++ b/drivers/usb/host/xhci-pci-renesas.c
@@ -50,20 +50,6 @@
 #define RENESAS_RETRY	10000
 #define RENESAS_DELAY	10
 
-#define ROM_VALID_01 0x2013
-#define ROM_VALID_02 0x2026
-
-static int renesas_verify_fw_version(struct pci_dev *pdev, u32 version)
-{
-	switch (version) {
-	case ROM_VALID_01:
-	case ROM_VALID_02:
-		return 0;
-	}
-	dev_err(&pdev->dev, "FW has invalid version :%d\n", version);
-	return -EINVAL;
-}
-
 static int renesas_fw_download_image(struct pci_dev *dev,
 				     const u32 *fw, size_t step, bool rom)
 {
@@ -202,10 +188,7 @@ static int renesas_check_rom_state(struct pci_dev *pdev)
 
 	version &= RENESAS_FW_VERSION_FIELD;
 	version = version >> RENESAS_FW_VERSION_OFFSET;
-
-	err = renesas_verify_fw_version(pdev, version);
-	if (err)
-		return err;
+	dev_dbg(&pdev->dev, "Found ROM version: %x\n", version);
 
 	/*
 	 * Test if ROM is present and loaded, if so we can skip everything
-- 
GitLab


From 7a2f2974f26542b4e7b9b4321edb3cbbf3eeb91a Mon Sep 17 00:00:00 2001
From: "M. Vefa Bicakci" <m.v.b@runbox.com>
Date: Mon, 10 Aug 2020 19:00:17 +0300
Subject: [PATCH 0208/1341] usbip: Implement a match function to fix usbip

Commit 88b7381a939d ("USB: Select better matching USB drivers when
available") introduced the use of a "match" function to select a
non-generic/better driver for a particular USB device. This
unfortunately breaks the operation of usbip in general, as reported in
the kernel bugzilla with bug 208267 (linked below).

Upon inspecting the aforementioned commit, one can observe that the
original code in the usb_device_match function used to return 1
unconditionally, but the aforementioned commit makes the usb_device_match
function use identifier tables and "match" virtual functions, if either of
them are available.

Hence, this commit implements a match function for usbip that
unconditionally returns true to ensure that usbip is functional again.

This change has been verified to restore usbip functionality, with a
v5.7.y kernel on an up-to-date version of Qubes OS 4.0, which uses
usbip to redirect USB devices between VMs.

Thanks to Jonathan Dieter for the effort in bisecting this issue down
to the aforementioned commit.

Fixes: 88b7381a939d ("USB: Select better matching USB drivers when available")
Link: https://bugzilla.kernel.org/show_bug.cgi?id=208267
Link: https://bugzilla.redhat.com/show_bug.cgi?id=1856443
Link: https://github.com/QubesOS/qubes-issues/issues/5905
Signed-off-by: M. Vefa Bicakci <m.v.b@runbox.com>
Cc: <stable@vger.kernel.org> # 5.7
Cc: Valentina Manea <valentina.manea.m@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Reviewed-by: Bastien Nocera <hadess@hadess.net>
Reviewed-by: Shuah Khan <skhan@linuxfoundation.org>
Link: https://lore.kernel.org/r/20200810160017.46002-1-m.v.b@runbox.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/usbip/stub_dev.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/usb/usbip/stub_dev.c b/drivers/usb/usbip/stub_dev.c
index 2305d425e6c9a..9d7d642022d1f 100644
--- a/drivers/usb/usbip/stub_dev.c
+++ b/drivers/usb/usbip/stub_dev.c
@@ -461,6 +461,11 @@ static void stub_disconnect(struct usb_device *udev)
 	return;
 }
 
+static bool usbip_match(struct usb_device *udev)
+{
+	return true;
+}
+
 #ifdef CONFIG_PM
 
 /* These functions need usb_port_suspend and usb_port_resume,
@@ -486,6 +491,7 @@ struct usb_device_driver stub_driver = {
 	.name		= "usbip-host",
 	.probe		= stub_probe,
 	.disconnect	= stub_disconnect,
+	.match		= usbip_match,
 #ifdef CONFIG_PM
 	.suspend	= stub_suspend,
 	.resume		= stub_resume,
-- 
GitLab


From 0ff0705a2ef2929e9326c95df48bdbebb0dafaad Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 9 Aug 2020 16:19:01 +0200
Subject: [PATCH 0209/1341] usb: typec: ucsi: Fix AB BA lock inversion

Lockdep reports an AB BA lock inversion between ucsi_init() and
ucsi_handle_connector_change():

AB order:

1. ucsi_init takes ucsi->ppm_lock (it runs with that locked for the
   duration of the function)
2. usci_init eventually end up calling ucsi_register_displayport,
   which takes ucsi_connector->lock

BA order:

1. ucsi_handle_connector_change work is started, takes ucsi_connector->lock
2. ucsi_handle_connector_change calls ucsi_send_command which takes
   ucsi->ppm_lock

The ppm_lock really only needs to be hold during 2 functions:
ucsi_reset_ppm() and ucsi_run_command().

This commit fixes the AB BA lock inversion by making ucsi_init drop the
ucsi->ppm_lock before it starts registering ports; and replacing any
ucsi_run_command() calls after this point with ucsi_send_command()
(which is a wrapper around run_command taking the lock while handling
the command).

Some of the replacing of ucsi_run_command with ucsi_send_command
in the helpers used during port registration also fixes a number of
code paths after registration which call ucsi_run_command() without
holding the ppm_lock:
1. ucsi_altmode_update_active() call in ucsi/displayport.c
2. ucsi_register_altmodes() call from ucsi_handle_connector_change()
   (through ucsi_partner_change())

Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200809141904.4317-2-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/ucsi/ucsi.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index affd024190c91..05babc09f3a8c 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -205,7 +205,7 @@ void ucsi_altmode_update_active(struct ucsi_connector *con)
 	int i;
 
 	command = UCSI_GET_CURRENT_CAM | UCSI_CONNECTOR_NUMBER(con->num);
-	ret = ucsi_run_command(con->ucsi, command, &cur, sizeof(cur));
+	ret = ucsi_send_command(con->ucsi, command, &cur, sizeof(cur));
 	if (ret < 0) {
 		if (con->ucsi->version > 0x0100) {
 			dev_err(con->ucsi->dev,
@@ -354,7 +354,7 @@ ucsi_register_altmodes_nvidia(struct ucsi_connector *con, u8 recipient)
 		command |= UCSI_GET_ALTMODE_RECIPIENT(recipient);
 		command |= UCSI_GET_ALTMODE_CONNECTOR_NUMBER(con->num);
 		command |= UCSI_GET_ALTMODE_OFFSET(i);
-		len = ucsi_run_command(con->ucsi, command, &alt, sizeof(alt));
+		len = ucsi_send_command(con->ucsi, command, &alt, sizeof(alt));
 		/*
 		 * We are collecting all altmodes first and then registering.
 		 * Some type-C device will return zero length data beyond last
@@ -431,7 +431,7 @@ static int ucsi_register_altmodes(struct ucsi_connector *con, u8 recipient)
 		command |= UCSI_GET_ALTMODE_RECIPIENT(recipient);
 		command |= UCSI_GET_ALTMODE_CONNECTOR_NUMBER(con->num);
 		command |= UCSI_GET_ALTMODE_OFFSET(i);
-		len = ucsi_run_command(con->ucsi, command, alt, sizeof(alt));
+		len = ucsi_send_command(con->ucsi, command, alt, sizeof(alt));
 		if (len <= 0)
 			return len;
 
@@ -904,7 +904,7 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 	/* Get connector capability */
 	command = UCSI_GET_CONNECTOR_CAPABILITY;
 	command |= UCSI_CONNECTOR_NUMBER(con->num);
-	ret = ucsi_run_command(ucsi, command, &con->cap, sizeof(con->cap));
+	ret = ucsi_send_command(ucsi, command, &con->cap, sizeof(con->cap));
 	if (ret < 0)
 		return ret;
 
@@ -953,8 +953,7 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 
 	/* Get the status */
 	command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
-	ret = ucsi_run_command(ucsi, command, &con->status,
-			       sizeof(con->status));
+	ret = ucsi_send_command(ucsi, command, &con->status, sizeof(con->status));
 	if (ret < 0) {
 		dev_err(ucsi->dev, "con%d: failed to get status\n", con->num);
 		return 0;
@@ -1044,6 +1043,8 @@ static int ucsi_init(struct ucsi *ucsi)
 		goto err_reset;
 	}
 
+	mutex_unlock(&ucsi->ppm_lock);
+
 	/* Register all connectors */
 	for (i = 0; i < ucsi->cap.num_connectors; i++) {
 		ret = ucsi_register_port(ucsi, i);
@@ -1054,12 +1055,10 @@ static int ucsi_init(struct ucsi *ucsi)
 	/* Enable all notifications */
 	ucsi->ntfy = UCSI_ENABLE_NTFY_ALL;
 	command = UCSI_SET_NOTIFICATION_ENABLE | ucsi->ntfy;
-	ret = ucsi_run_command(ucsi, command, NULL, 0);
+	ret = ucsi_send_command(ucsi, command, NULL, 0);
 	if (ret < 0)
 		goto err_unregister;
 
-	mutex_unlock(&ucsi->ppm_lock);
-
 	return 0;
 
 err_unregister:
@@ -1071,6 +1070,7 @@ static int ucsi_init(struct ucsi *ucsi)
 		con->port = NULL;
 	}
 
+	mutex_lock(&ucsi->ppm_lock);
 err_reset:
 	ucsi_reset_ppm(ucsi);
 err:
-- 
GitLab


From 7e90057f125c8c852940b848e06e7a72f050fc6f Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 9 Aug 2020 16:19:02 +0200
Subject: [PATCH 0210/1341] usb: typec: ucsi: Fix 2 unlocked ucsi_run_command
 calls

Fix 2 unlocked ucsi_run_command calls:

1. ucsi_handle_connector_change() contains one ucsi_send_command() call,
which takes the ppm_lock for it; and one ucsi_run_command() call which
relies on the caller have taking the ppm_lock.
ucsi_handle_connector_change() does not take the lock, so the
second (ucsi_run_command) calls should also be ucsi_send_command().

2. ucsi_get_pdos() gets called from ucsi_handle_connector_change() which
does not hold the ppm_lock, so it also must use ucsi_send_command().

This commit also adds a WARN_ON(!mutex_is_locked(&ucsi->ppm_lock)); to
ucsi_run_command() to avoid similar problems getting re-introduced in
the future.

Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200809141904.4317-3-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/ucsi/ucsi.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 05babc09f3a8c..3b208ea59a503 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -152,6 +152,8 @@ static int ucsi_run_command(struct ucsi *ucsi, u64 command,
 	u8 length;
 	int ret;
 
+	WARN_ON(!mutex_is_locked(&ucsi->ppm_lock));
+
 	ret = ucsi_exec_command(ucsi, command);
 	if (ret < 0)
 		return ret;
@@ -502,7 +504,7 @@ static void ucsi_get_pdos(struct ucsi_connector *con, int is_partner)
 	command |= UCSI_GET_PDOS_PARTNER_PDO(is_partner);
 	command |= UCSI_GET_PDOS_NUM_PDOS(UCSI_MAX_PDOS - 1);
 	command |= UCSI_GET_PDOS_SRC_PDOS;
-	ret = ucsi_run_command(ucsi, command, con->src_pdos,
+	ret = ucsi_send_command(ucsi, command, con->src_pdos,
 			       sizeof(con->src_pdos));
 	if (ret < 0) {
 		dev_err(ucsi->dev, "UCSI_GET_PDOS failed (%d)\n", ret);
@@ -681,7 +683,7 @@ static void ucsi_handle_connector_change(struct work_struct *work)
 		 */
 		command = UCSI_GET_CAM_SUPPORTED;
 		command |= UCSI_CONNECTOR_NUMBER(con->num);
-		ucsi_run_command(con->ucsi, command, NULL, 0);
+		ucsi_send_command(con->ucsi, command, NULL, 0);
 	}
 
 	if (con->status.change & UCSI_CONSTAT_PARTNER_CHANGE)
-- 
GitLab


From 25794e3079d2a98547b6bf5764ef0240aa89b798 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 9 Aug 2020 16:19:03 +0200
Subject: [PATCH 0211/1341] usb: typec: ucsi: Rework ppm_lock handling

The ppm_lock really only needs to be hold during 2 functions:
ucsi_reset_ppm() and ucsi_run_command().

Push the taking of the lock down into these 2 functions, renaming
ucsi_run_command() to ucsi_send_command() which was an existing
wrapper already taking the lock for its callers.

This simplifies things for the callers and removes the difference
between ucsi_send_command() and ucsi_run_command() which has led
to various locking bugs in the past.

Cc: stable@vger.kernel.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200809141904.4317-4-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/ucsi/ucsi.c | 56 ++++++++++++++---------------------
 1 file changed, 22 insertions(+), 34 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 3b208ea59a503..8a35144211e5f 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -146,42 +146,33 @@ static int ucsi_exec_command(struct ucsi *ucsi, u64 cmd)
 	return UCSI_CCI_LENGTH(cci);
 }
 
-static int ucsi_run_command(struct ucsi *ucsi, u64 command,
-			    void *data, size_t size)
+int ucsi_send_command(struct ucsi *ucsi, u64 command,
+		      void *data, size_t size)
 {
 	u8 length;
 	int ret;
 
-	WARN_ON(!mutex_is_locked(&ucsi->ppm_lock));
+	mutex_lock(&ucsi->ppm_lock);
 
 	ret = ucsi_exec_command(ucsi, command);
 	if (ret < 0)
-		return ret;
+		goto out;
 
 	length = ret;
 
 	if (data) {
 		ret = ucsi->ops->read(ucsi, UCSI_MESSAGE_IN, data, size);
 		if (ret)
-			return ret;
+			goto out;
 	}
 
 	ret = ucsi_acknowledge_command(ucsi);
 	if (ret)
-		return ret;
-
-	return length;
-}
+		goto out;
 
-int ucsi_send_command(struct ucsi *ucsi, u64 command,
-		      void *retval, size_t size)
-{
-	int ret;
-
-	mutex_lock(&ucsi->ppm_lock);
-	ret = ucsi_run_command(ucsi, command, retval, size);
+	ret = length;
+out:
 	mutex_unlock(&ucsi->ppm_lock);
-
 	return ret;
 }
 EXPORT_SYMBOL_GPL(ucsi_send_command);
@@ -738,20 +729,24 @@ static int ucsi_reset_ppm(struct ucsi *ucsi)
 	u32 cci;
 	int ret;
 
+	mutex_lock(&ucsi->ppm_lock);
+
 	ret = ucsi->ops->async_write(ucsi, UCSI_CONTROL, &command,
 				     sizeof(command));
 	if (ret < 0)
-		return ret;
+		goto out;
 
 	tmo = jiffies + msecs_to_jiffies(UCSI_TIMEOUT_MS);
 
 	do {
-		if (time_is_before_jiffies(tmo))
-			return -ETIMEDOUT;
+		if (time_is_before_jiffies(tmo)) {
+			ret = -ETIMEDOUT;
+			goto out;
+		}
 
 		ret = ucsi->ops->read(ucsi, UCSI_CCI, &cci, sizeof(cci));
 		if (ret)
-			return ret;
+			goto out;
 
 		/* If the PPM is still doing something else, reset it again. */
 		if (cci & ~UCSI_CCI_RESET_COMPLETE) {
@@ -759,13 +754,15 @@ static int ucsi_reset_ppm(struct ucsi *ucsi)
 						     &command,
 						     sizeof(command));
 			if (ret < 0)
-				return ret;
+				goto out;
 		}
 
 		msleep(20);
 	} while (!(cci & UCSI_CCI_RESET_COMPLETE));
 
-	return 0;
+out:
+	mutex_unlock(&ucsi->ppm_lock);
+	return ret;
 }
 
 static int ucsi_role_cmd(struct ucsi_connector *con, u64 command)
@@ -777,9 +774,7 @@ static int ucsi_role_cmd(struct ucsi_connector *con, u64 command)
 		u64 c;
 
 		/* PPM most likely stopped responding. Resetting everything. */
-		mutex_lock(&con->ucsi->ppm_lock);
 		ucsi_reset_ppm(con->ucsi);
-		mutex_unlock(&con->ucsi->ppm_lock);
 
 		c = UCSI_SET_NOTIFICATION_ENABLE | con->ucsi->ntfy;
 		ucsi_send_command(con->ucsi, c, NULL, 0);
@@ -1010,8 +1005,6 @@ static int ucsi_init(struct ucsi *ucsi)
 	int ret;
 	int i;
 
-	mutex_lock(&ucsi->ppm_lock);
-
 	/* Reset the PPM */
 	ret = ucsi_reset_ppm(ucsi);
 	if (ret) {
@@ -1022,13 +1015,13 @@ static int ucsi_init(struct ucsi *ucsi)
 	/* Enable basic notifications */
 	ucsi->ntfy = UCSI_ENABLE_NTFY_CMD_COMPLETE | UCSI_ENABLE_NTFY_ERROR;
 	command = UCSI_SET_NOTIFICATION_ENABLE | ucsi->ntfy;
-	ret = ucsi_run_command(ucsi, command, NULL, 0);
+	ret = ucsi_send_command(ucsi, command, NULL, 0);
 	if (ret < 0)
 		goto err_reset;
 
 	/* Get PPM capabilities */
 	command = UCSI_GET_CAPABILITY;
-	ret = ucsi_run_command(ucsi, command, &ucsi->cap, sizeof(ucsi->cap));
+	ret = ucsi_send_command(ucsi, command, &ucsi->cap, sizeof(ucsi->cap));
 	if (ret < 0)
 		goto err_reset;
 
@@ -1045,8 +1038,6 @@ static int ucsi_init(struct ucsi *ucsi)
 		goto err_reset;
 	}
 
-	mutex_unlock(&ucsi->ppm_lock);
-
 	/* Register all connectors */
 	for (i = 0; i < ucsi->cap.num_connectors; i++) {
 		ret = ucsi_register_port(ucsi, i);
@@ -1072,12 +1063,9 @@ static int ucsi_init(struct ucsi *ucsi)
 		con->port = NULL;
 	}
 
-	mutex_lock(&ucsi->ppm_lock);
 err_reset:
 	ucsi_reset_ppm(ucsi);
 err:
-	mutex_unlock(&ucsi->ppm_lock);
-
 	return ret;
 }
 
-- 
GitLab


From bed97b30968ba354035a020989df0623e52b5536 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Sun, 9 Aug 2020 16:19:04 +0200
Subject: [PATCH 0212/1341] usb: typec: ucsi: Hold con->lock for the entire
 duration of ucsi_register_port()

Commit 081da1325d35 ("usb: typec: ucsi: displayport: Fix a potential race
during registration") made the ucsi code hold con->lock in
ucsi_register_displayport(). But we really don't want any interactions
with the connector to run before the port-registration process is fully
complete.

This commit moves the taking of con->lock from ucsi_register_displayport()
into ucsi_register_port() to achieve this.

Cc: stable@vger.kernel.org
Fixes: 081da1325d35 ("usb: typec: ucsi: displayport: Fix a potential race during registration")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20200809141904.4317-5-hdegoede@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/ucsi/displayport.c |  9 +-------
 drivers/usb/typec/ucsi/ucsi.c        | 31 ++++++++++++++++++++--------
 2 files changed, 23 insertions(+), 17 deletions(-)

diff --git a/drivers/usb/typec/ucsi/displayport.c b/drivers/usb/typec/ucsi/displayport.c
index 048381c058a5b..261131c9e37c6 100644
--- a/drivers/usb/typec/ucsi/displayport.c
+++ b/drivers/usb/typec/ucsi/displayport.c
@@ -288,8 +288,6 @@ struct typec_altmode *ucsi_register_displayport(struct ucsi_connector *con,
 	struct typec_altmode *alt;
 	struct ucsi_dp *dp;
 
-	mutex_lock(&con->lock);
-
 	/* We can't rely on the firmware with the capabilities. */
 	desc->vdo |= DP_CAP_DP_SIGNALING | DP_CAP_RECEPTACLE;
 
@@ -298,15 +296,12 @@ struct typec_altmode *ucsi_register_displayport(struct ucsi_connector *con,
 	desc->vdo |= all_assignments << 16;
 
 	alt = typec_port_register_altmode(con->port, desc);
-	if (IS_ERR(alt)) {
-		mutex_unlock(&con->lock);
+	if (IS_ERR(alt))
 		return alt;
-	}
 
 	dp = devm_kzalloc(&alt->dev, sizeof(*dp), GFP_KERNEL);
 	if (!dp) {
 		typec_unregister_altmode(alt);
-		mutex_unlock(&con->lock);
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -319,7 +314,5 @@ struct typec_altmode *ucsi_register_displayport(struct ucsi_connector *con,
 	alt->ops = &ucsi_displayport_ops;
 	typec_altmode_set_drvdata(alt, dp);
 
-	mutex_unlock(&con->lock);
-
 	return alt;
 }
diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index 8a35144211e5f..e680fcfdee609 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -898,12 +898,15 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 	con->num = index + 1;
 	con->ucsi = ucsi;
 
+	/* Delay other interactions with the con until registration is complete */
+	mutex_lock(&con->lock);
+
 	/* Get connector capability */
 	command = UCSI_GET_CONNECTOR_CAPABILITY;
 	command |= UCSI_CONNECTOR_NUMBER(con->num);
 	ret = ucsi_send_command(ucsi, command, &con->cap, sizeof(con->cap));
 	if (ret < 0)
-		return ret;
+		goto out;
 
 	if (con->cap.op_mode & UCSI_CONCAP_OPMODE_DRP)
 		cap->data = TYPEC_PORT_DRD;
@@ -935,26 +938,32 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 
 	ret = ucsi_register_port_psy(con);
 	if (ret)
-		return ret;
+		goto out;
 
 	/* Register the connector */
 	con->port = typec_register_port(ucsi->dev, cap);
-	if (IS_ERR(con->port))
-		return PTR_ERR(con->port);
+	if (IS_ERR(con->port)) {
+		ret = PTR_ERR(con->port);
+		goto out;
+	}
 
 	/* Alternate modes */
 	ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_CON);
-	if (ret)
+	if (ret) {
 		dev_err(ucsi->dev, "con%d: failed to register alt modes\n",
 			con->num);
+		goto out;
+	}
 
 	/* Get the status */
 	command = UCSI_GET_CONNECTOR_STATUS | UCSI_CONNECTOR_NUMBER(con->num);
 	ret = ucsi_send_command(ucsi, command, &con->status, sizeof(con->status));
 	if (ret < 0) {
 		dev_err(ucsi->dev, "con%d: failed to get status\n", con->num);
-		return 0;
+		ret = 0;
+		goto out;
 	}
+	ret = 0; /* ucsi_send_command() returns length on success */
 
 	switch (UCSI_CONSTAT_PARTNER_TYPE(con->status.flags)) {
 	case UCSI_CONSTAT_PARTNER_TYPE_UFP:
@@ -979,17 +988,21 @@ static int ucsi_register_port(struct ucsi *ucsi, int index)
 
 	if (con->partner) {
 		ret = ucsi_register_altmodes(con, UCSI_RECIPIENT_SOP);
-		if (ret)
+		if (ret) {
 			dev_err(ucsi->dev,
 				"con%d: failed to register alternate modes\n",
 				con->num);
-		else
+			ret = 0;
+		} else {
 			ucsi_altmode_update_active(con);
+		}
 	}
 
 	trace_ucsi_register_port(con->num, &con->status);
 
-	return 0;
+out:
+	mutex_unlock(&con->lock);
+	return ret;
 }
 
 /**
-- 
GitLab


From 7b2816dd293031b9dec476d7853c099dc2ec9172 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 14 Aug 2020 21:22:18 +0300
Subject: [PATCH 0213/1341] usb: hcd: Fix use after free in
 usb_hcd_pci_remove()

On the removal stage we put a reference to the controller structure and
if it's not used anymore it gets freed, but later we try to dereference
a pointer to a member of that structure.

Copy necessary field to a temporary variable to avoid use after free.

Fixes: 306c54d0edb6 ("usb: hcd: Try MSI interrupts on PCI devices")
Reported-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/linux-usb/30a8c4ca-64c2-863b-cfcd-0970599c0ba3@huawei.com/
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200814182218.71957-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/hcd-pci.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/core/hcd-pci.c b/drivers/usb/core/hcd-pci.c
index 4dc443aaef5c6..ec0d6c50610ce 100644
--- a/drivers/usb/core/hcd-pci.c
+++ b/drivers/usb/core/hcd-pci.c
@@ -315,11 +315,14 @@ EXPORT_SYMBOL_GPL(usb_hcd_pci_probe);
 void usb_hcd_pci_remove(struct pci_dev *dev)
 {
 	struct usb_hcd		*hcd;
+	int			hcd_driver_flags;
 
 	hcd = pci_get_drvdata(dev);
 	if (!hcd)
 		return;
 
+	hcd_driver_flags = hcd->driver->flags;
+
 	if (pci_dev_run_wake(dev))
 		pm_runtime_get_noresume(&dev->dev);
 
@@ -347,7 +350,7 @@ void usb_hcd_pci_remove(struct pci_dev *dev)
 		up_read(&companions_rwsem);
 	}
 	usb_put_hcd(hcd);
-	if ((hcd->driver->flags & HCD_MASK) < HCD_USB3)
+	if ((hcd_driver_flags & HCD_MASK) < HCD_USB3)
 		pci_free_irq_vectors(dev);
 	pci_disable_device(dev);
 }
-- 
GitLab


From 316a2868bc269be8c6e69ccc3a1f902a3f518eb9 Mon Sep 17 00:00:00 2001
From: JC Kuo <jckuo@nvidia.com>
Date: Tue, 11 Aug 2020 17:31:43 +0800
Subject: [PATCH 0214/1341] usb: host: xhci-tegra: otg usb2/usb3 port init

tegra_xusb_init_usb_phy() should initialize "otg_usb2_port" and
"otg_usb3_port" with -EINVAL because "0" is a valid value
represents usb2 port 0 or usb3 port 0.

Signed-off-by: JC Kuo <jckuo@nvidia.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200811093143.699541-1-jckuo@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci-tegra.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index 014d79334f50e..0489a316099a7 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -1258,6 +1258,8 @@ static int tegra_xusb_init_usb_phy(struct tegra_xusb *tegra)
 
 	INIT_WORK(&tegra->id_work, tegra_xhci_id_work);
 	tegra->id_nb.notifier_call = tegra_xhci_id_notify;
+	tegra->otg_usb2_port = -EINVAL;
+	tegra->otg_usb3_port = -EINVAL;
 
 	for (i = 0; i < tegra->num_usb_phys; i++) {
 		struct phy *phy = tegra_xusb_get_phy(tegra, "usb2", i);
-- 
GitLab


From d54343a87732726b04ac5af873916b5ed4f52932 Mon Sep 17 00:00:00 2001
From: JC Kuo <jckuo@nvidia.com>
Date: Tue, 11 Aug 2020 17:25:53 +0800
Subject: [PATCH 0215/1341] usb: host: xhci-tegra: fix tegra_xusb_get_phy()

tegra_xusb_get_phy() should take input argument "name".

Signed-off-by: JC Kuo <jckuo@nvidia.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200811092553.657762-1-jckuo@nvidia.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci-tegra.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index 0489a316099a7..190923d8b246e 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -1136,7 +1136,7 @@ static struct phy *tegra_xusb_get_phy(struct tegra_xusb *tegra, char *name,
 	unsigned int i, phy_count = 0;
 
 	for (i = 0; i < tegra->soc->num_types; i++) {
-		if (!strncmp(tegra->soc->phy_types[i].name, "usb2",
+		if (!strncmp(tegra->soc->phy_types[i].name, name,
 							    strlen(name)))
 			return tegra->phys[phy_count+port];
 
-- 
GitLab


From adb6e6ac20eedcf1dce19dc75b224e63c0828ea1 Mon Sep 17 00:00:00 2001
From: Bastien Nocera <hadess@hadess.net>
Date: Tue, 18 Aug 2020 13:04:43 +0200
Subject: [PATCH 0216/1341] USB: Also match device drivers using the ->match
 vfunc

We only ever used the ID table matching before, but we should also support
open-coded match functions.

Fixes: 88b7381a939de ("USB: Select better matching USB drivers when available")
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200818110445.509668-1-hadess@hadess.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/generic.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/core/generic.c b/drivers/usb/core/generic.c
index b6f2d4b447546..2b2f1ab6e36aa 100644
--- a/drivers/usb/core/generic.c
+++ b/drivers/usb/core/generic.c
@@ -205,8 +205,9 @@ static int __check_usb_generic(struct device_driver *drv, void *data)
 	udrv = to_usb_device_driver(drv);
 	if (udrv == &usb_generic_driver)
 		return 0;
-
-	return usb_device_match_id(udev, udrv->id_table) != NULL;
+	if (usb_device_match_id(udev, udrv->id_table) != NULL)
+		return 1;
+	return (udrv->match && udrv->match(udev));
 }
 
 static bool usb_generic_driver_match(struct usb_device *udev)
-- 
GitLab


From d5643d2249b279077427b2c2b2ffae9b70c95b0b Mon Sep 17 00:00:00 2001
From: Bastien Nocera <hadess@hadess.net>
Date: Tue, 18 Aug 2020 13:04:45 +0200
Subject: [PATCH 0217/1341] USB: Fix device driver race

When a new device with a specialised device driver is plugged in, the
new driver will be modprobe()'d but the driver core will attach the
"generic" driver to the device.

After that, nothing will trigger a reprobe when the modprobe()'d device
driver has finished initialising, as the device has the "generic"
driver attached to it.

Trigger a reprobe ourselves when new specialised drivers get registered.

Fixes: 88b7381a939d ("USB: Select better matching USB drivers when available")
Signed-off-by: Bastien Nocera <hadess@hadess.net>
Cc: stable <stable@vger.kernel.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20200818110445.509668-3-hadess@hadess.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/driver.c | 40 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 38 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index f81606c6a35b0..7e73e989645bd 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -905,6 +905,35 @@ static int usb_uevent(struct device *dev, struct kobj_uevent_env *env)
 	return 0;
 }
 
+static bool is_dev_usb_generic_driver(struct device *dev)
+{
+	struct usb_device_driver *udd = dev->driver ?
+		to_usb_device_driver(dev->driver) : NULL;
+
+	return udd == &usb_generic_driver;
+}
+
+static int __usb_bus_reprobe_drivers(struct device *dev, void *data)
+{
+	struct usb_device_driver *new_udriver = data;
+	struct usb_device *udev;
+	int ret;
+
+	if (!is_dev_usb_generic_driver(dev))
+		return 0;
+
+	udev = to_usb_device(dev);
+	if (usb_device_match_id(udev, new_udriver->id_table) == NULL &&
+	    (!new_udriver->match || new_udriver->match(udev) != 0))
+		return 0;
+
+	ret = device_reprobe(dev);
+	if (ret && ret != -EPROBE_DEFER)
+		dev_err(dev, "Failed to reprobe device (error %d)\n", ret);
+
+	return 0;
+}
+
 /**
  * usb_register_device_driver - register a USB device (not interface) driver
  * @new_udriver: USB operations for the device driver
@@ -934,13 +963,20 @@ int usb_register_device_driver(struct usb_device_driver *new_udriver,
 
 	retval = driver_register(&new_udriver->drvwrap.driver);
 
-	if (!retval)
+	if (!retval) {
 		pr_info("%s: registered new device driver %s\n",
 			usbcore_name, new_udriver->name);
-	else
+		/*
+		 * Check whether any device could be better served with
+		 * this new driver
+		 */
+		bus_for_each_dev(&usb_bus_type, NULL, new_udriver,
+				 __usb_bus_reprobe_drivers);
+	} else {
 		printk(KERN_ERR "%s: error %d registering device "
 			"	driver %s\n",
 			usbcore_name, retval, new_udriver->name);
+	}
 
 	return retval;
 }
-- 
GitLab


From 2b86d9b8ec6efb86fc5ea44f2d49b1df17f699a1 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Tue, 4 Aug 2020 18:06:37 +0200
Subject: [PATCH 0218/1341] speakup: Fix wait_for_xmitr for ttyio case

This was missed while introducing the tty-based serial access.

The only remaining use of wait_for_xmitr with tty-based access is in
spk_synth_is_alive_restart to check whether the synth can be restarted.
With tty-based this is up to the tty layer to cope with the buffering
etc. so we can just say yes.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/20200804160637.x3iycau5izywbgzl@function
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/accessibility/speakup/serialio.c  | 8 +++++---
 drivers/accessibility/speakup/spk_priv.h  | 1 -
 drivers/accessibility/speakup/spk_ttyio.c | 7 +++++++
 drivers/accessibility/speakup/spk_types.h | 1 +
 drivers/accessibility/speakup/synth.c     | 2 +-
 5 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/drivers/accessibility/speakup/serialio.c b/drivers/accessibility/speakup/serialio.c
index 177a2988641c1..403b01d66367e 100644
--- a/drivers/accessibility/speakup/serialio.c
+++ b/drivers/accessibility/speakup/serialio.c
@@ -32,6 +32,7 @@ static void spk_serial_tiocmset(unsigned int set, unsigned int clear);
 static unsigned char spk_serial_in(void);
 static unsigned char spk_serial_in_nowait(void);
 static void spk_serial_flush_buffer(void);
+static int spk_serial_wait_for_xmitr(struct spk_synth *in_synth);
 
 struct spk_io_ops spk_serial_io_ops = {
 	.synth_out = spk_serial_out,
@@ -40,6 +41,7 @@ struct spk_io_ops spk_serial_io_ops = {
 	.synth_in = spk_serial_in,
 	.synth_in_nowait = spk_serial_in_nowait,
 	.flush_buffer = spk_serial_flush_buffer,
+	.wait_for_xmitr = spk_serial_wait_for_xmitr,
 };
 EXPORT_SYMBOL_GPL(spk_serial_io_ops);
 
@@ -211,7 +213,7 @@ void spk_stop_serial_interrupt(void)
 }
 EXPORT_SYMBOL_GPL(spk_stop_serial_interrupt);
 
-int spk_wait_for_xmitr(struct spk_synth *in_synth)
+static int spk_serial_wait_for_xmitr(struct spk_synth *in_synth)
 {
 	int tmout = SPK_XMITR_TIMEOUT;
 
@@ -280,7 +282,7 @@ static void spk_serial_flush_buffer(void)
 
 static int spk_serial_out(struct spk_synth *in_synth, const char ch)
 {
-	if (in_synth->alive && spk_wait_for_xmitr(in_synth)) {
+	if (in_synth->alive && spk_serial_wait_for_xmitr(in_synth)) {
 		outb_p(ch, speakup_info.port_tts);
 		return 1;
 	}
@@ -295,7 +297,7 @@ const char *spk_serial_synth_immediate(struct spk_synth *synth,
 	while ((ch = *buff)) {
 		if (ch == '\n')
 			ch = synth->procspeech;
-		if (spk_wait_for_xmitr(synth))
+		if (spk_serial_wait_for_xmitr(synth))
 			outb(ch, speakup_info.port_tts);
 		else
 			return buff;
diff --git a/drivers/accessibility/speakup/spk_priv.h b/drivers/accessibility/speakup/spk_priv.h
index c75b408387947..0f4bcbe5ddb93 100644
--- a/drivers/accessibility/speakup/spk_priv.h
+++ b/drivers/accessibility/speakup/spk_priv.h
@@ -34,7 +34,6 @@
 
 const struct old_serial_port *spk_serial_init(int index);
 void spk_stop_serial_interrupt(void);
-int spk_wait_for_xmitr(struct spk_synth *in_synth);
 void spk_serial_release(void);
 void spk_ttyio_release(void);
 void spk_ttyio_register_ldisc(void);
diff --git a/drivers/accessibility/speakup/spk_ttyio.c b/drivers/accessibility/speakup/spk_ttyio.c
index 9b95f77f92657..a831ff64f8ba5 100644
--- a/drivers/accessibility/speakup/spk_ttyio.c
+++ b/drivers/accessibility/speakup/spk_ttyio.c
@@ -116,6 +116,7 @@ static void spk_ttyio_tiocmset(unsigned int set, unsigned int clear);
 static unsigned char spk_ttyio_in(void);
 static unsigned char spk_ttyio_in_nowait(void);
 static void spk_ttyio_flush_buffer(void);
+static int spk_ttyio_wait_for_xmitr(struct spk_synth *in_synth);
 
 struct spk_io_ops spk_ttyio_ops = {
 	.synth_out = spk_ttyio_out,
@@ -125,6 +126,7 @@ struct spk_io_ops spk_ttyio_ops = {
 	.synth_in = spk_ttyio_in,
 	.synth_in_nowait = spk_ttyio_in_nowait,
 	.flush_buffer = spk_ttyio_flush_buffer,
+	.wait_for_xmitr = spk_ttyio_wait_for_xmitr,
 };
 EXPORT_SYMBOL_GPL(spk_ttyio_ops);
 
@@ -286,6 +288,11 @@ static void spk_ttyio_tiocmset(unsigned int set, unsigned int clear)
 	mutex_unlock(&speakup_tty_mutex);
 }
 
+static int spk_ttyio_wait_for_xmitr(struct spk_synth *in_synth)
+{
+	return 1;
+}
+
 static unsigned char ttyio_in(int timeout)
 {
 	struct spk_ldisc_data *ldisc_data = speakup_tty->disc_data;
diff --git a/drivers/accessibility/speakup/spk_types.h b/drivers/accessibility/speakup/spk_types.h
index d3272c6d199aa..7398f1196e103 100644
--- a/drivers/accessibility/speakup/spk_types.h
+++ b/drivers/accessibility/speakup/spk_types.h
@@ -158,6 +158,7 @@ struct spk_io_ops {
 	unsigned char (*synth_in)(void);
 	unsigned char (*synth_in_nowait)(void);
 	void (*flush_buffer)(void);
+	int (*wait_for_xmitr)(struct spk_synth *synth);
 };
 
 struct spk_synth {
diff --git a/drivers/accessibility/speakup/synth.c b/drivers/accessibility/speakup/synth.c
index 3568bfb89912c..ac47dbac72075 100644
--- a/drivers/accessibility/speakup/synth.c
+++ b/drivers/accessibility/speakup/synth.c
@@ -159,7 +159,7 @@ int spk_synth_is_alive_restart(struct spk_synth *synth)
 {
 	if (synth->alive)
 		return 1;
-	if (spk_wait_for_xmitr(synth) > 0) {
+	if (synth->io_ops->wait_for_xmitr(synth) > 0) {
 		/* restart */
 		synth->alive = 1;
 		synth_printf("%s", synth->init);
-- 
GitLab


From dfe650be6f79fc69021a9b7a559d5aca1e2ef359 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Tue, 4 Aug 2020 18:06:59 +0200
Subject: [PATCH 0219/1341] speakup: only build serialio when ISA is enabled

Drivers using serialio were already made available in Kconfig only under
the ISA condition.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Link: https://lore.kernel.org/r/20200804160659.7y76sdseow43lfms@function
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/accessibility/speakup/Kconfig  | 13 +++++++++----
 drivers/accessibility/speakup/Makefile |  2 +-
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/accessibility/speakup/Kconfig b/drivers/accessibility/speakup/Kconfig
index 0803c2013cf4d..07ecbbde03841 100644
--- a/drivers/accessibility/speakup/Kconfig
+++ b/drivers/accessibility/speakup/Kconfig
@@ -42,6 +42,11 @@ config SPEAKUP
 		one of the listed synthesizers, you should say n.
 
 if SPEAKUP
+
+config SPEAKUP_SERIALIO
+	def_bool y
+	depends on ISA || COMPILE_TEST
+
 config SPEAKUP_SYNTH_ACNTSA
 	tristate "Accent SA synthesizer support"
 	help
@@ -52,7 +57,7 @@ config SPEAKUP_SYNTH_ACNTSA
 
 config SPEAKUP_SYNTH_ACNTPC
 	tristate "Accent PC synthesizer support"
-	depends on ISA || COMPILE_TEST
+	depends on SPEAKUP_SERIALIO
 	help
 		This is the Speakup driver for the accent pc
 		synthesizer.  You can say y to build it into the kernel,
@@ -104,7 +109,7 @@ config SPEAKUP_SYNTH_DECEXT
 
 config SPEAKUP_SYNTH_DECPC
 	depends on m
-	depends on ISA || COMPILE_TEST
+	depends on SPEAKUP_SERIALIO
 	tristate "DECtalk PC (big ISA card) synthesizer support"
 	help
 
@@ -127,7 +132,7 @@ config SPEAKUP_SYNTH_DECPC
 
 config SPEAKUP_SYNTH_DTLK
 	tristate "DoubleTalk PC synthesizer support"
-	depends on ISA || COMPILE_TEST
+	depends on SPEAKUP_SERIALIO
 	help
 
 		This is the Speakup driver for the internal DoubleTalk
@@ -138,7 +143,7 @@ config SPEAKUP_SYNTH_DTLK
 
 config SPEAKUP_SYNTH_KEYPC
 	tristate "Keynote Gold PC synthesizer support"
-	depends on ISA || COMPILE_TEST
+	depends on SPEAKUP_SERIALIO
 	help
 
 		This is the Speakup driver for the Keynote Gold
diff --git a/drivers/accessibility/speakup/Makefile b/drivers/accessibility/speakup/Makefile
index 5befb4933b850..6e4bfac8af650 100644
--- a/drivers/accessibility/speakup/Makefile
+++ b/drivers/accessibility/speakup/Makefile
@@ -25,8 +25,8 @@ speakup-y := \
 	keyhelp.o \
 	kobjects.o \
 	selection.o \
-	serialio.o \
 	spk_ttyio.o \
 	synth.o \
 	thread.o \
 	varhandlers.o
+speakup-$(CONFIG_SPEAKUP_SERIALIO) += serialio.o
-- 
GitLab


From 1dbcf46d516b3ab9b114ffcb7b8a55ee5e375523 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Wed, 29 Jul 2020 12:18:45 +0900
Subject: [PATCH 0220/1341] extract-cert: add static to local data

Fix the following warning from sparse:

  scripts/extract-cert.c:74:5: warning: symbol 'kbuild_verbose' was not declared. Should it be static?

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/extract-cert.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/extract-cert.c b/scripts/extract-cert.c
index b071bf476fea7..3bc48c726c41c 100644
--- a/scripts/extract-cert.c
+++ b/scripts/extract-cert.c
@@ -71,7 +71,7 @@ static void drain_openssl_errors(void)
 static const char *key_pass;
 static BIO *wb;
 static char *cert_dst;
-int kbuild_verbose;
+static int kbuild_verbose;
 
 static void write_cert(X509 *x509)
 {
-- 
GitLab


From efbf97265f9fc5e1978df6cf0e3df4d5b157f070 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Wed, 12 Aug 2020 23:49:23 +0900
Subject: [PATCH 0221/1341] kbuild: remove redundant patterns in
 filter/filter-out

The '%' in filter/filter-out matches to any number of any characters,
including empty string.

So, '%config' matches to 'config', and '%install' to 'install'.

Drop the redundant patterns.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Makefile | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 9cac6fde34795..c4470a4e131f2 100644
--- a/Makefile
+++ b/Makefile
@@ -265,8 +265,7 @@ no-dot-config-targets := $(clean-targets) \
 			 $(version_h) headers headers_% archheaders archscripts \
 			 %asm-generic kernelversion %src-pkg dt_binding_check \
 			 outputmakefile
-no-sync-config-targets := $(no-dot-config-targets) install %install \
-			   kernelrelease
+no-sync-config-targets := $(no-dot-config-targets) %install kernelrelease
 single-targets := %.a %.i %.ko %.lds %.ll %.lst %.mod %.o %.s %.symtypes %/
 
 config-build	:=
@@ -292,7 +291,7 @@ ifneq ($(KBUILD_EXTMOD),)
 endif
 
 ifeq ($(KBUILD_EXTMOD),)
-        ifneq ($(filter config %config,$(MAKECMDGOALS)),)
+        ifneq ($(filter %config,$(MAKECMDGOALS)),)
 		config-build := 1
                 ifneq ($(words $(MAKECMDGOALS)),1)
 			mixed-build := 1
-- 
GitLab


From e29a6d633e2782ec0278b8c199135ad24a99240d Mon Sep 17 00:00:00 2001
From: Joe Perches <joe@perches.com>
Date: Fri, 14 Aug 2020 18:38:15 -0700
Subject: [PATCH 0222/1341] genksyms: keywords: Use __restrict not _restrict

Use the proper form of the RESTRICT keyword.

Quote the comments properly too.

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/genksyms/keywords.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/genksyms/keywords.c b/scripts/genksyms/keywords.c
index 7a85c4e211750..057c6cabad1d9 100644
--- a/scripts/genksyms/keywords.c
+++ b/scripts/genksyms/keywords.c
@@ -25,9 +25,9 @@ static struct resword {
 	{ "__int128_t", BUILTIN_INT_KEYW },
 	{ "__uint128_t", BUILTIN_INT_KEYW },
 
-	// According to rth, c99 defines "_Bool", __restrict", __restrict__", "restrict".  KAO
+	// According to rth, c99 defines "_Bool", "__restrict", "__restrict__", "restrict".  KAO
 	{ "_Bool", BOOL_KEYW },
-	{ "_restrict", RESTRICT_KEYW },
+	{ "__restrict", RESTRICT_KEYW },
 	{ "__restrict__", RESTRICT_KEYW },
 	{ "restrict", RESTRICT_KEYW },
 	{ "asm", ASM_KEYW },
-- 
GitLab


From d85de3399f97467baa2026fbbbe587850d01ba8a Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 18 Aug 2020 01:36:29 +0900
Subject: [PATCH 0223/1341] kconfig: qconf: fix signal connection to invalid
 slots

If you right-click in the ConfigList window, you will see the following
messages in the console:

QObject::connect: No such slot QAction::setOn(bool) in scripts/kconfig/qconf.cc:888
QObject::connect:  (sender name:   'config')
QObject::connect: No such slot QAction::setOn(bool) in scripts/kconfig/qconf.cc:897
QObject::connect:  (sender name:   'config')
QObject::connect: No such slot QAction::setOn(bool) in scripts/kconfig/qconf.cc:906
QObject::connect:  (sender name:   'config')

Right, there is no such slot in QAction. I think this is a typo of
setChecked.

Due to this bug, when you toggled the menu "Option->Show Name/Range/Data"
the state of the context menu was not previously updated. Fix this.

Fixes: d5d973c3f8a9 ("Port xconfig to Qt5 - Put back some of the old implementation(part 2)")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index bc390df49f1fc..c1812563b8185 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -885,7 +885,7 @@ void ConfigList::contextMenuEvent(QContextMenuEvent *e)
 		connect(action, SIGNAL(toggled(bool)),
 			parent(), SLOT(setShowName(bool)));
 		connect(parent(), SIGNAL(showNameChanged(bool)),
-			action, SLOT(setOn(bool)));
+			action, SLOT(setChecked(bool)));
 		action->setChecked(showName);
 		headerPopup->addAction(action);
 
@@ -894,7 +894,7 @@ void ConfigList::contextMenuEvent(QContextMenuEvent *e)
 		connect(action, SIGNAL(toggled(bool)),
 			parent(), SLOT(setShowRange(bool)));
 		connect(parent(), SIGNAL(showRangeChanged(bool)),
-			action, SLOT(setOn(bool)));
+			action, SLOT(setChecked(bool)));
 		action->setChecked(showRange);
 		headerPopup->addAction(action);
 
@@ -903,7 +903,7 @@ void ConfigList::contextMenuEvent(QContextMenuEvent *e)
 		connect(action, SIGNAL(toggled(bool)),
 			parent(), SLOT(setShowData(bool)));
 		connect(parent(), SIGNAL(showDataChanged(bool)),
-			action, SLOT(setOn(bool)));
+			action, SLOT(setChecked(bool)));
 		action->setChecked(showData);
 		headerPopup->addAction(action);
 	}
@@ -1275,7 +1275,7 @@ QMenu* ConfigInfoView::createStandardContextMenu(const QPoint & pos)
 
 	action->setCheckable(true);
 	connect(action, SIGNAL(toggled(bool)), SLOT(setShowDebug(bool)));
-	connect(this, SIGNAL(showDebugChanged(bool)), action, SLOT(setOn(bool)));
+	connect(this, SIGNAL(showDebugChanged(bool)), action, SLOT(setChecked(bool)));
 	action->setChecked(showDebug());
 	popup->addSeparator();
 	popup->addAction(action);
-- 
GitLab


From 7d1300e63161d05735ebadf9b9d8bc89afe49d1c Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 18 Aug 2020 01:36:30 +0900
Subject: [PATCH 0224/1341] kconfig: qconf: fix the popup menu in the
 ConfigInfoView window

I do not know when ConfigInfoView::createStandardContextMenu() is
called.

Because QTextEdit::createStandardContextMenu() is not virtual,
ConfigInfoView::createStandardContextMenu() cannot override it.
Even if right-click the ConfigInfoView window, the "Show Debug Info"
menu does not show up.

Build up the menu in the constructor, and invoke it from the
contextMenuEvent().

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 29 +++++++++++++----------------
 scripts/kconfig/qconf.h  |  4 ++--
 2 files changed, 15 insertions(+), 18 deletions(-)

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index c1812563b8185..5a0aa159ec80a 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1012,6 +1012,16 @@ ConfigInfoView::ConfigInfoView(QWidget* parent, const char *name)
 		configSettings->endGroup();
 		connect(configApp, SIGNAL(aboutToQuit()), SLOT(saveSettings()));
 	}
+
+	contextMenu = createStandardContextMenu();
+	QAction *action = new QAction("Show Debug Info", contextMenu);
+
+	action->setCheckable(true);
+	connect(action, SIGNAL(toggled(bool)), SLOT(setShowDebug(bool)));
+	connect(this, SIGNAL(showDebugChanged(bool)), action, SLOT(setChecked(bool)));
+	action->setChecked(showDebug());
+	contextMenu->addSeparator();
+	contextMenu->addAction(action);
 }
 
 void ConfigInfoView::saveSettings(void)
@@ -1268,23 +1278,10 @@ void ConfigInfoView::clicked(const QUrl &url)
 	delete data;
 }
 
-QMenu* ConfigInfoView::createStandardContextMenu(const QPoint & pos)
-{
-	QMenu* popup = Parent::createStandardContextMenu(pos);
-	QAction* action = new QAction("Show Debug Info", popup);
-
-	action->setCheckable(true);
-	connect(action, SIGNAL(toggled(bool)), SLOT(setShowDebug(bool)));
-	connect(this, SIGNAL(showDebugChanged(bool)), action, SLOT(setChecked(bool)));
-	action->setChecked(showDebug());
-	popup->addSeparator();
-	popup->addAction(action);
-	return popup;
-}
-
-void ConfigInfoView::contextMenuEvent(QContextMenuEvent *e)
+void ConfigInfoView::contextMenuEvent(QContextMenuEvent *event)
 {
-	Parent::contextMenuEvent(e);
+	contextMenu->popup(event->globalPos());
+	event->accept();
 }
 
 ConfigSearchWindow::ConfigSearchWindow(ConfigMainWindow *parent)
diff --git a/scripts/kconfig/qconf.h b/scripts/kconfig/qconf.h
index 461df6419f15c..0b97a9817d2ba 100644
--- a/scripts/kconfig/qconf.h
+++ b/scripts/kconfig/qconf.h
@@ -215,6 +215,7 @@ public slots:
 class ConfigInfoView : public QTextBrowser {
 	Q_OBJECT
 	typedef class QTextBrowser Parent;
+	QMenu *contextMenu;
 public:
 	ConfigInfoView(QWidget* parent, const char *name = 0);
 	bool showDebug(void) const { return _showDebug; }
@@ -235,8 +236,7 @@ public slots:
 	QString debug_info(struct symbol *sym);
 	static QString print_filter(const QString &str);
 	static void expr_print_help(void *data, struct symbol *sym, const char *str);
-	QMenu *createStandardContextMenu(const QPoint & pos);
-	void contextMenuEvent(QContextMenuEvent *e);
+	void contextMenuEvent(QContextMenuEvent *event);
 
 	struct symbol *sym;
 	struct menu *_menu;
-- 
GitLab


From 66c262be8f50c043bf6d2f43fa8070e5d3ba7bc0 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Tue, 18 Aug 2020 01:36:31 +0900
Subject: [PATCH 0225/1341] kconfig: qconf: remove unused colNr

This is not used at all.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/kconfig/qconf.h b/scripts/kconfig/qconf.h
index 0b97a9817d2ba..f97376a8123f7 100644
--- a/scripts/kconfig/qconf.h
+++ b/scripts/kconfig/qconf.h
@@ -30,7 +30,7 @@ class ConfigSettings : public QSettings {
 };
 
 enum colIdx {
-	promptColIdx, nameColIdx, noColIdx, modColIdx, yesColIdx, dataColIdx, colNr
+	promptColIdx, nameColIdx, noColIdx, modColIdx, yesColIdx, dataColIdx
 };
 enum listMode {
 	singleMode, menuMode, symbolMode, fullMode, listMode
-- 
GitLab


From f8d1653daec02315e06d30246cff4af72e76e54e Mon Sep 17 00:00:00 2001
From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date: Wed, 29 Jul 2020 23:57:01 +0900
Subject: [PATCH 0226/1341] vt: defer kfree() of vc_screenbuf in vc_do_resize()

syzbot is reporting UAF bug in set_origin() from vc_do_resize() [1], for
vc_do_resize() calls kfree(vc->vc_screenbuf) before calling set_origin().

Unfortunately, in set_origin(), vc->vc_sw->con_set_origin() might access
vc->vc_pos when scroll is involved in order to manipulate cursor, but
vc->vc_pos refers already released vc->vc_screenbuf until vc->vc_pos gets
updated based on the result of vc->vc_sw->con_set_origin().

Preserving old buffer and tolerating outdated vc members until set_origin()
completes would be easier than preventing vc->vc_sw->con_set_origin() from
accessing outdated vc members.

[1] https://syzkaller.appspot.com/bug?id=6649da2081e2ebdc65c0642c214b27fe91099db3

Reported-by: syzbot <syzbot+9116ecc1978ca3a12f43@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/1596034621-4714-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/vt/vt.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index ccb533fd00a29..a4f08c0da84be 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1201,7 +1201,7 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
 	unsigned int old_rows, old_row_size, first_copied_row;
 	unsigned int new_cols, new_rows, new_row_size, new_screen_size;
 	unsigned int user;
-	unsigned short *newscreen;
+	unsigned short *oldscreen, *newscreen;
 	struct uni_screen *new_uniscr = NULL;
 
 	WARN_CONSOLE_UNLOCKED();
@@ -1299,10 +1299,11 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
 	if (new_scr_end > new_origin)
 		scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
 			    new_scr_end - new_origin);
-	kfree(vc->vc_screenbuf);
+	oldscreen = vc->vc_screenbuf;
 	vc->vc_screenbuf = newscreen;
 	vc->vc_screenbuf_size = new_screen_size;
 	set_origin(vc);
+	kfree(oldscreen);
 
 	/* do part of a reset_terminal() */
 	vc->vc_top = 0;
-- 
GitLab


From 39b3cffb8cf3111738ea993e2757ab382253d86a Mon Sep 17 00:00:00 2001
From: George Kennedy <george.kennedy@oracle.com>
Date: Fri, 31 Jul 2020 12:33:11 -0400
Subject: [PATCH 0227/1341] fbcon: prevent user font height or width change
 from causing potential out-of-bounds access

Add a check to fbcon_resize() to ensure that a possible change to user font
height or user font width will not allow a font data out-of-bounds access.
NOTE: must use original charcount in calculation as font charcount can
change and cannot be used to determine the font data allocated size.

Signed-off-by: George Kennedy <george.kennedy@oracle.com>
Cc: stable <stable@vger.kernel.org>
Reported-by: syzbot+38a3699c7eaf165b97a6@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/1596213192-6635-1-git-send-email-george.kennedy@oracle.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/video/fbdev/core/fbcon.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 8a31fc2b2258a..66167830fefd1 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2191,6 +2191,9 @@ static void updatescrollmode(struct fbcon_display *p,
 	}
 }
 
+#define PITCH(w) (((w) + 7) >> 3)
+#define CALC_FONTSZ(h, p, c) ((h) * (p) * (c)) /* size = height * pitch * charcount */
+
 static int fbcon_resize(struct vc_data *vc, unsigned int width, 
 			unsigned int height, unsigned int user)
 {
@@ -2200,6 +2203,24 @@ static int fbcon_resize(struct vc_data *vc, unsigned int width,
 	struct fb_var_screeninfo var = info->var;
 	int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
 
+	if (ops->p && ops->p->userfont && FNTSIZE(vc->vc_font.data)) {
+		int size;
+		int pitch = PITCH(vc->vc_font.width);
+
+		/*
+		 * If user font, ensure that a possible change to user font
+		 * height or width will not allow a font data out-of-bounds access.
+		 * NOTE: must use original charcount in calculation as font
+		 * charcount can change and cannot be used to determine the
+		 * font data allocated size.
+		 */
+		if (pitch <= 0)
+			return -EINVAL;
+		size = CALC_FONTSZ(vc->vc_font.height, pitch, FNTCHARCNT(vc->vc_font.data));
+		if (size > FNTSIZE(vc->vc_font.data))
+			return -EINVAL;
+	}
+
 	virt_w = FBCON_SWAP(ops->rotate, width, height);
 	virt_h = FBCON_SWAP(ops->rotate, height, width);
 	virt_fw = FBCON_SWAP(ops->rotate, vc->vc_font.width,
@@ -2652,7 +2673,7 @@ static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
 	int size;
 	int i, csum;
 	u8 *new_data, *data = font->data;
-	int pitch = (font->width+7) >> 3;
+	int pitch = PITCH(font->width);
 
 	/* Is there a reason why fbconsole couldn't handle any charcount >256?
 	 * If not this check should be changed to charcount < 256 */
@@ -2668,7 +2689,7 @@ static int fbcon_set_font(struct vc_data *vc, struct console_font *font,
 	if (fbcon_invalid_charcount(info, charcount))
 		return -EINVAL;
 
-	size = h * pitch * charcount;
+	size = CALC_FONTSZ(h, pitch, charcount);
 
 	new_data = kmalloc(FONT_EXTRA_WORDS * sizeof(int) + size, GFP_USER);
 
-- 
GitLab


From bc5269ca765057a1b762e79a1cfd267cd7bf1c46 Mon Sep 17 00:00:00 2001
From: George Kennedy <george.kennedy@oracle.com>
Date: Fri, 31 Jul 2020 12:33:12 -0400
Subject: [PATCH 0228/1341] vt_ioctl: change VT_RESIZEX ioctl to check for
 error return from vc_resize()

vc_resize() can return with an error after failure. Change VT_RESIZEX ioctl
to save struct vc_data values that are modified and restore the original
values in case of error.

Signed-off-by: George Kennedy <george.kennedy@oracle.com>
Cc: stable <stable@vger.kernel.org>
Reported-by: syzbot+38a3699c7eaf165b97a6@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/1596213192-6635-2-git-send-email-george.kennedy@oracle.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/vt/vt_ioctl.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/vt/vt_ioctl.c b/drivers/tty/vt/vt_ioctl.c
index 91c3017750476..a4e520bdd521d 100644
--- a/drivers/tty/vt/vt_ioctl.c
+++ b/drivers/tty/vt/vt_ioctl.c
@@ -806,12 +806,22 @@ static int vt_resizex(struct vc_data *vc, struct vt_consize __user *cs)
 		console_lock();
 		vcp = vc_cons[i].d;
 		if (vcp) {
+			int ret;
+			int save_scan_lines = vcp->vc_scan_lines;
+			int save_font_height = vcp->vc_font.height;
+
 			if (v.v_vlin)
 				vcp->vc_scan_lines = v.v_vlin;
 			if (v.v_clin)
 				vcp->vc_font.height = v.v_clin;
 			vcp->vc_resize_user = 1;
-			vc_resize(vcp, v.v_cols, v.v_rows);
+			ret = vc_resize(vcp, v.v_cols, v.v_rows);
+			if (ret) {
+				vcp->vc_scan_lines = save_scan_lines;
+				vcp->vc_font.height = save_font_height;
+				console_unlock();
+				return ret;
+			}
 		}
 		console_unlock();
 	}
-- 
GitLab


From d681a6e4e353958cba22faf2c48474ad1efa20c8 Mon Sep 17 00:00:00 2001
From: Douglas Anderson <dianders@chromium.org>
Date: Thu, 6 Aug 2020 22:19:08 -0700
Subject: [PATCH 0229/1341] serial: qcom_geni_serial: Fix recent kdb hang

The commit e42d6c3ec0c7 ("serial: qcom_geni_serial: Make kgdb work
even if UART isn't console") worked pretty well and I've been doing a
lot of debugging with it.  However, recently I typed "dmesg" in kdb
and then held the space key down to scroll through the pagination.  My
device hung.  This was repeatable and I found that it was introduced
with the aforementioned commit.

It turns out that there are some strange boundary cases in geni where
in some weird situations it will signal RX_LAST but then will put 0 in
RX_LAST_BYTE.  This means that the entire last FIFO entry is valid.
This weird corner case is handled in qcom_geni_serial_handle_rx()
where you can see that we only honor RX_LAST_BYTE if RX_LAST is set
_and_ RX_LAST_BYTE is non-zero.  If either of these is not true we use
BYTES_PER_FIFO_WORD (4) for the size of the last FIFO word.

Let's fix kgdb.  While at it, also use the proper #define for 4.

Fixes: e42d6c3ec0c7 ("serial: qcom_geni_serial: Make kgdb work even if UART isn't console")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Akash Asthana <akashast@codeaurora.org>
Link: https://lore.kernel.org/r/20200806221904.1.I4455ff86f0ef5281c2a0cd0a4712db614548a5ca@changeid
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/qcom_geni_serial.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 3aa29d201f54d..31e57dd940329 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -361,11 +361,16 @@ static int qcom_geni_serial_get_char(struct uart_port *uport)
 			return NO_POLL_CHAR;
 
 		if (word_cnt == 1 && (status & RX_LAST))
+			/*
+			 * NOTE: If RX_LAST_BYTE_VALID is 0 it needs to be
+			 * treated as if it was BYTES_PER_FIFO_WORD.
+			 */
 			private_data->poll_cached_bytes_cnt =
 				(status & RX_LAST_BYTE_VALID_MSK) >>
 				RX_LAST_BYTE_VALID_SHFT;
-		else
-			private_data->poll_cached_bytes_cnt = 4;
+
+		if (private_data->poll_cached_bytes_cnt == 0)
+			private_data->poll_cached_bytes_cnt = BYTES_PER_FIFO_WORD;
 
 		private_data->poll_cached_bytes =
 			readl(uport->membase + SE_GENI_RX_FIFOn);
-- 
GitLab


From 975efc66d4e654207c17f939eb737ac591ac38fe Mon Sep 17 00:00:00 2001
From: John Stultz <john.stultz@linaro.org>
Date: Tue, 11 Aug 2020 02:50:44 +0000
Subject: [PATCH 0230/1341] tty: serial: qcom_geni_serial: Drop __init from
 qcom_geni_console_setup

When booting with heavily modularized config, the serial console
may not be able to load until after init when modules that
satisfy needed dependencies have time to load.

Unfortunately, as qcom_geni_console_setup is marked as __init,
the function may have been freed before we get to run it,
causing boot time crashes such as:

[    6.469057] Unable to handle kernel paging request at virtual address ffffffe645d4e6cc
[    6.481623] Mem abort info:
[    6.484466]   ESR = 0x86000007
[    6.487557]   EC = 0x21: IABT (current EL), IL = 32 bits
[    6.492929]   SET = 0, FnV = 0g
[    6.496016]   EA = 0, S1PTW = 0
[    6.499202] swapper pgtable: 4k pages, 39-bit VAs, pgdp=000000008151e000
[    6.501286] ufshcd-qcom 1d84000.ufshc: ufshcd_print_pwr_info:[RX, TX]: gear=[3, 3], lane[2, 2], pwr[FAST MODE, FAST MODE], rate = 2
[    6.505977] [ffffffe645d4e6cc] pgd=000000017df9f003, p4d=000000017df9f003, pud=000000017df9f003, pmd=000000017df9c003, pte=0000000000000000
[    6.505990] Internal error: Oops: 86000007 [#1] PREEMPT SMP
[    6.505995] Modules linked in: zl10353 zl10039 zl10036 zd1301_demod xc5000 xc4000 ves1x93 ves1820 tuner_xc2028 tuner_simple tuner_types tua9001 tua6100 1
[    6.506152]  isl6405
[    6.518104] ufshcd-qcom 1d84000.ufshc: ufshcd_find_max_sup_active_icc_level: Regulator capability was not set, actvIccLevel=0
[    6.530549]  horus3a helene fc2580 fc0013 fc0012 fc0011 ec100 e4000 dvb_pll ds3000 drxk drxd drx39xyj dib9000 dib8000 dib7000p dib7000m dib3000mc dibx003
[    6.624271] CPU: 7 PID: 148 Comm: kworker/7:2 Tainted: G        W       5.8.0-mainline-12021-g6defd37ba1cd #3455
[    6.624273] Hardware name: Thundercomm Dragonboard 845c (DT)
[    6.624290] Workqueue: events deferred_probe_work_func
[    6.624296] pstate: 40c00005 (nZcv daif +PAN +UAO BTYPE=--)
[    6.624307] pc : qcom_geni_console_setup+0x0/0x110
[    6.624316] lr : try_enable_new_console+0xa0/0x140
[    6.624318] sp : ffffffc010843a30
[    6.624320] x29: ffffffc010843a30 x28: ffffffe645c3e7d0
[    6.624325] x27: ffffff80f8022180 x26: ffffffc010843b28
[    6.637937] x25: 0000000000000000 x24: ffffffe6462a2000
[    6.637941] x23: ffffffe646398000 x22: 0000000000000000
[    6.637945] x21: 0000000000000000 x20: ffffffe6462a5ce8
[    6.637952] x19: ffffffe646398e38 x18: ffffffffffffffff
[    6.680296] x17: 0000000000000000 x16: ffffffe64492b900
[    6.680300] x15: ffffffe6461e9d08 x14: 69202930203d2064
[    6.680305] x13: 7561625f65736162 x12: 202c363331203d20
[    6.696434] x11: 0000000000000030 x10: 0101010101010101
[    6.696438] x9 : 4d4d20746120304d x8 : 7f7f7f7f7f7f7f7f
[    6.707249] x7 : feff4c524c787373 x6 : 0000000000008080
[    6.707253] x5 : 0000000000000000 x4 : 8080000000000000
[    6.707257] x3 : 0000000000000000 x2 : ffffffe645d4e6cc
[    6.744223] qcom_geni_serial 898000.serial: dev_pm_opp_set_rate: failed to find OPP for freq 102400000 (-34)
[    6.744966] x1 : fffffffefe74e174 x0 : ffffffe6462a5ce8
[    6.753580] qcom_geni_serial 898000.serial: dev_pm_opp_set_rate: failed to find OPP for freq 102400000 (-34)
[    6.761634] Call trace:
[    6.761639]  qcom_geni_console_setup+0x0/0x110
[    6.761645]  register_console+0x29c/0x2f8
[    6.767981] Bluetooth: hci0: Frame reassembly failed (-84)
[    6.775252]  uart_add_one_port+0x438/0x500
[    6.775258]  qcom_geni_serial_probe+0x2c4/0x4a8
[    6.775266]  platform_drv_probe+0x58/0xa8
[    6.855359]  really_probe+0xec/0x398
[    6.855362]  driver_probe_device+0x5c/0xb8
[    6.855367]  __device_attach_driver+0x98/0xb8
[    7.184945]  bus_for_each_drv+0x74/0xd8
[    7.188825]  __device_attach+0xec/0x148
[    7.192705]  device_initial_probe+0x24/0x30
[    7.196937]  bus_probe_device+0x9c/0xa8
[    7.200816]  deferred_probe_work_func+0x7c/0xb8
[    7.205398]  process_one_work+0x20c/0x4b0
[    7.209456]  worker_thread+0x48/0x460
[    7.213157]  kthread+0x14c/0x158
[    7.216432]  ret_from_fork+0x10/0x18
[    7.220049] Code: bad PC value
[    7.223139] ---[ end trace 73f3b21e251d5a70 ]---

Thus this patch removes the __init avoiding crash in such
configs.

Cc: Andy Gross <agross@kernel.org>
Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Todd Kjos <tkjos@google.com>
Cc: Amit Pundir <amit.pundir@linaro.org>
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-serial@vger.kernel.org
Suggested-by: Saravana Kannan <saravanak@google.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200811025044.70626-1-john.stultz@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/qcom_geni_serial.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/qcom_geni_serial.c b/drivers/tty/serial/qcom_geni_serial.c
index 31e57dd940329..184b458820a31 100644
--- a/drivers/tty/serial/qcom_geni_serial.c
+++ b/drivers/tty/serial/qcom_geni_serial.c
@@ -1103,7 +1103,7 @@ static unsigned int qcom_geni_serial_tx_empty(struct uart_port *uport)
 }
 
 #ifdef CONFIG_SERIAL_QCOM_GENI_CONSOLE
-static int __init qcom_geni_console_setup(struct console *co, char *options)
+static int qcom_geni_console_setup(struct console *co, char *options)
 {
 	struct uart_port *uport;
 	struct qcom_geni_serial_port *port;
-- 
GitLab


From c6b9e95dde7b54e6a53c47241201ab5a4035c320 Mon Sep 17 00:00:00 2001
From: Valmer Huhn <valmer.huhn@concurrent-rt.com>
Date: Thu, 13 Aug 2020 12:52:55 -0400
Subject: [PATCH 0231/1341] serial: 8250_exar: Fix number of ports for Commtech
 PCIe cards

The following in 8250_exar.c line 589 is used to determine the number
of ports for each Exar board:

nr_ports = board->num_ports ? board->num_ports : pcidev->device & 0x0f;

If the number of ports a card has is not explicitly specified, it defaults
to the rightmost 4 bits of the PCI device ID. This is prone to error since
not all PCI device IDs contain a number which corresponds to the number of
ports that card provides.

This particular case involves COMMTECH_4222PCIE, COMMTECH_4224PCIE and
COMMTECH_4228PCIE cards with device IDs 0x0022, 0x0020 and 0x0021.
Currently the multiport cards receive 2, 0 and 1 port instead of 2, 4 and
8 ports respectively.

To fix this, each Commtech Fastcom PCIe card is given a struct where the
number of ports is explicitly specified. This ensures 'board->num_ports'
is used instead of the default 'pcidev->device & 0x0f'.

Fixes: d0aeaa83f0b0 ("serial: exar: split out the exar code from 8250_pci")
Signed-off-by: Valmer Huhn <valmer.huhn@concurrent-rt.com>
Tested-by: Valmer Huhn <valmer.huhn@concurrent-rt.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200813165255.GC345440@icarus.concurrent-rt.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/8250/8250_exar.c | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_exar.c b/drivers/tty/serial/8250/8250_exar.c
index 04b9af7ed9415..2d0e7c7e408dc 100644
--- a/drivers/tty/serial/8250/8250_exar.c
+++ b/drivers/tty/serial/8250/8250_exar.c
@@ -744,6 +744,24 @@ static const struct exar8250_board pbn_exar_XR17V35x = {
 	.exit		= pci_xr17v35x_exit,
 };
 
+static const struct exar8250_board pbn_fastcom35x_2 = {
+	.num_ports	= 2,
+	.setup		= pci_xr17v35x_setup,
+	.exit		= pci_xr17v35x_exit,
+};
+
+static const struct exar8250_board pbn_fastcom35x_4 = {
+	.num_ports	= 4,
+	.setup		= pci_xr17v35x_setup,
+	.exit		= pci_xr17v35x_exit,
+};
+
+static const struct exar8250_board pbn_fastcom35x_8 = {
+	.num_ports	= 8,
+	.setup		= pci_xr17v35x_setup,
+	.exit		= pci_xr17v35x_exit,
+};
+
 static const struct exar8250_board pbn_exar_XR17V4358 = {
 	.num_ports	= 12,
 	.setup		= pci_xr17v35x_setup,
@@ -811,9 +829,9 @@ static const struct pci_device_id exar_pci_tbl[] = {
 	EXAR_DEVICE(EXAR, XR17V358, pbn_exar_XR17V35x),
 	EXAR_DEVICE(EXAR, XR17V4358, pbn_exar_XR17V4358),
 	EXAR_DEVICE(EXAR, XR17V8358, pbn_exar_XR17V8358),
-	EXAR_DEVICE(COMMTECH, 4222PCIE, pbn_exar_XR17V35x),
-	EXAR_DEVICE(COMMTECH, 4224PCIE, pbn_exar_XR17V35x),
-	EXAR_DEVICE(COMMTECH, 4228PCIE, pbn_exar_XR17V35x),
+	EXAR_DEVICE(COMMTECH, 4222PCIE, pbn_fastcom35x_2),
+	EXAR_DEVICE(COMMTECH, 4224PCIE, pbn_fastcom35x_4),
+	EXAR_DEVICE(COMMTECH, 4228PCIE, pbn_fastcom35x_8),
 
 	EXAR_DEVICE(COMMTECH, 4222PCI335, pbn_fastcom335_2),
 	EXAR_DEVICE(COMMTECH, 4224PCI335, pbn_fastcom335_4),
-- 
GitLab


From 89efbe70b27dd325d8a8c177743a26b885f7faec Mon Sep 17 00:00:00 2001
From: Lukas Wunner <lukas@wunner.de>
Date: Thu, 13 Aug 2020 12:59:54 +0200
Subject: [PATCH 0232/1341] serial: pl011: Don't leak amba_ports entry on
 driver register error

pl011_probe() calls pl011_setup_port() to reserve an amba_ports[] entry,
then calls pl011_register_port() to register the uart driver with the
tty layer.

If registration of the uart driver fails, the amba_ports[] entry is not
released.  If this happens 14 times (value of UART_NR macro), then all
amba_ports[] entries will have been leaked and driver probing is no
longer possible.  (To be fair, that can only happen if the DeviceTree
doesn't contain alias IDs since they cause the same entry to be used for
a given port.)   Fix it.

Fixes: ef2889f7ffee ("serial: pl011: Move uart_register_driver call to device")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: stable@vger.kernel.org # v3.15+
Cc: Tushar Behera <tushar.behera@linaro.org>
Link: https://lore.kernel.org/r/138f8c15afb2f184d8102583f8301575566064a6.1597316167.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/amba-pl011.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index c010f639298dd..7893048bea2d9 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -2615,7 +2615,7 @@ static int pl011_setup_port(struct device *dev, struct uart_amba_port *uap,
 
 static int pl011_register_port(struct uart_amba_port *uap)
 {
-	int ret;
+	int ret, i;
 
 	/* Ensure interrupts from this UART are masked and cleared */
 	pl011_write(0, uap, REG_IMSC);
@@ -2626,6 +2626,9 @@ static int pl011_register_port(struct uart_amba_port *uap)
 		if (ret < 0) {
 			dev_err(uap->port.dev,
 				"Failed to register AMBA-PL011 driver\n");
+			for (i = 0; i < ARRAY_SIZE(amba_ports); i++)
+				if (amba_ports[i] == uap)
+					amba_ports[i] = NULL;
 			return ret;
 		}
 	}
-- 
GitLab


From 27afac93e3bd7fa89749cf11da5d86ac9cde4dba Mon Sep 17 00:00:00 2001
From: Lukas Wunner <lukas@wunner.de>
Date: Thu, 13 Aug 2020 12:52:40 +0200
Subject: [PATCH 0233/1341] serial: pl011: Fix oops on -EPROBE_DEFER

If probing of a pl011 gets deferred until after free_initmem(), an oops
ensues because pl011_console_match() is called which has been freed.

Fix by removing the __init attribute from the function and those it
calls.

Commit 10879ae5f12e ("serial: pl011: add console matching function")
introduced pl011_console_match() not just for early consoles but
regular preferred consoles, such as those added by acpi_parse_spcr().
Regular consoles may be registered after free_initmem() for various
reasons, one being deferred probing, another being dynamic enablement
of serial ports using a DeviceTree overlay.

Thus, pl011_console_match() must not be declared __init and the
functions it calls mustn't either.

Stack trace for posterity:

Unable to handle kernel paging request at virtual address 80c38b58
Internal error: Oops: 8000000d [#1] PREEMPT SMP ARM
PC is at pl011_console_match+0x0/0xfc
LR is at register_console+0x150/0x468
[<80187004>] (register_console)
[<805a8184>] (uart_add_one_port)
[<805b2b68>] (pl011_register_port)
[<805b3ce4>] (pl011_probe)
[<80569214>] (amba_probe)
[<805ca088>] (really_probe)
[<805ca2ec>] (driver_probe_device)
[<805ca5b0>] (__device_attach_driver)
[<805c8060>] (bus_for_each_drv)
[<805c9dfc>] (__device_attach)
[<805ca630>] (device_initial_probe)
[<805c90a8>] (bus_probe_device)
[<805c95a8>] (deferred_probe_work_func)

Fixes: 10879ae5f12e ("serial: pl011: add console matching function")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: stable@vger.kernel.org # v4.10+
Cc: Aleksey Makarov <amakarov@marvell.com>
Cc: Peter Hurley <peter@hurleysoftware.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Christopher Covington <cov@codeaurora.org>
Link: https://lore.kernel.org/r/f827ff09da55b8c57d316a1b008a137677b58921.1597315557.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/amba-pl011.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 7893048bea2d9..67498594d7d7e 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -2241,9 +2241,8 @@ pl011_console_write(struct console *co, const char *s, unsigned int count)
 	clk_disable(uap->clk);
 }
 
-static void __init
-pl011_console_get_options(struct uart_amba_port *uap, int *baud,
-			     int *parity, int *bits)
+static void pl011_console_get_options(struct uart_amba_port *uap, int *baud,
+				      int *parity, int *bits)
 {
 	if (pl011_read(uap, REG_CR) & UART01x_CR_UARTEN) {
 		unsigned int lcr_h, ibrd, fbrd;
@@ -2276,7 +2275,7 @@ pl011_console_get_options(struct uart_amba_port *uap, int *baud,
 	}
 }
 
-static int __init pl011_console_setup(struct console *co, char *options)
+static int pl011_console_setup(struct console *co, char *options)
 {
 	struct uart_amba_port *uap;
 	int baud = 38400;
@@ -2344,8 +2343,8 @@ static int __init pl011_console_setup(struct console *co, char *options)
  *
  *	Returns 0 if console matches; otherwise non-zero to use default matching
  */
-static int __init pl011_console_match(struct console *co, char *name, int idx,
-				      char *options)
+static int pl011_console_match(struct console *co, char *name, int idx,
+			       char *options)
 {
 	unsigned char iotype;
 	resource_size_t addr;
-- 
GitLab


From fdf16d78941b4f380753053d229955baddd00712 Mon Sep 17 00:00:00 2001
From: Holger Assmann <h.assmann@pengutronix.de>
Date: Thu, 13 Aug 2020 17:27:57 +0200
Subject: [PATCH 0234/1341] serial: stm32: avoid kernel warning on absence of
 optional IRQ

stm32_init_port() of the stm32-usart may trigger a warning in
platform_get_irq() when the device tree specifies no wakeup interrupt.

The wakeup interrupt is usually a board-specific GPIO and the driver
functions correctly in its absence. The mainline stm32mp151.dtsi does
not specify it, so all mainline device trees trigger an unnecessary
kernel warning. Use of platform_get_irq_optional() avoids this.

Fixes: 2c58e56096dd ("serial: stm32: fix the get_irq error case")
Signed-off-by: Holger Assmann <h.assmann@pengutronix.de>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200813152757.32751-1-h.assmann@pengutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/stm32-usart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 143300a800909..ba503dd04ce2d 100644
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -970,7 +970,7 @@ static int stm32_init_port(struct stm32_port *stm32port,
 		return ret;
 
 	if (stm32port->info->cfg.has_wakeup) {
-		stm32port->wakeirq = platform_get_irq(pdev, 1);
+		stm32port->wakeirq = platform_get_irq_optional(pdev, 1);
 		if (stm32port->wakeirq <= 0 && stm32port->wakeirq != -ENXIO)
 			return stm32port->wakeirq ? : -ENODEV;
 	}
-- 
GitLab


From 205d300aea75623e1ae4aa43e0d265ab9cf195fd Mon Sep 17 00:00:00 2001
From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Date: Mon, 17 Aug 2020 11:26:46 +0900
Subject: [PATCH 0235/1341] serial: 8250: change lock order in
 serial8250_do_startup()

We have a number of "uart.port->desc.lock vs desc.lock->uart.port"
lockdep reports coming from 8250 driver; this causes a bit of trouble
to people, so let's fix it.

The problem is reverse lock order in two different call paths:

chain #1:

 serial8250_do_startup()
  spin_lock_irqsave(&port->lock);
   disable_irq_nosync(port->irq);
    raw_spin_lock_irqsave(&desc->lock)

chain #2:

  __report_bad_irq()
   raw_spin_lock_irqsave(&desc->lock)
    for_each_action_of_desc()
     printk()
      spin_lock_irqsave(&port->lock);

Fix this by changing the order of locks in serial8250_do_startup():
 do disable_irq_nosync() first, which grabs desc->lock, and grab
 uart->port after that, so that chain #1 and chain #2 have same lock
 order.

Full lockdep splat:

 ======================================================
 WARNING: possible circular locking dependency detected
 5.4.39 #55 Not tainted
 ======================================================

 swapper/0/0 is trying to acquire lock:
 ffffffffab65b6c0 (console_owner){-...}, at: console_lock_spinning_enable+0x31/0x57

 but task is already holding lock:
 ffff88810a8e34c0 (&irq_desc_lock_class){-.-.}, at: __report_bad_irq+0x5b/0xba

 which lock already depends on the new lock.

 the existing dependency chain (in reverse order) is:

 -> #2 (&irq_desc_lock_class){-.-.}:
        _raw_spin_lock_irqsave+0x61/0x8d
        __irq_get_desc_lock+0x65/0x89
        __disable_irq_nosync+0x3b/0x93
        serial8250_do_startup+0x451/0x75c
        uart_startup+0x1b4/0x2ff
        uart_port_activate+0x73/0xa0
        tty_port_open+0xae/0x10a
        uart_open+0x1b/0x26
        tty_open+0x24d/0x3a0
        chrdev_open+0xd5/0x1cc
        do_dentry_open+0x299/0x3c8
        path_openat+0x434/0x1100
        do_filp_open+0x9b/0x10a
        do_sys_open+0x15f/0x3d7
        kernel_init_freeable+0x157/0x1dd
        kernel_init+0xe/0x105
        ret_from_fork+0x27/0x50

 -> #1 (&port_lock_key){-.-.}:
        _raw_spin_lock_irqsave+0x61/0x8d
        serial8250_console_write+0xa7/0x2a0
        console_unlock+0x3b7/0x528
        vprintk_emit+0x111/0x17f
        printk+0x59/0x73
        register_console+0x336/0x3a4
        uart_add_one_port+0x51b/0x5be
        serial8250_register_8250_port+0x454/0x55e
        dw8250_probe+0x4dc/0x5b9
        platform_drv_probe+0x67/0x8b
        really_probe+0x14a/0x422
        driver_probe_device+0x66/0x130
        device_driver_attach+0x42/0x5b
        __driver_attach+0xca/0x139
        bus_for_each_dev+0x97/0xc9
        bus_add_driver+0x12b/0x228
        driver_register+0x64/0xed
        do_one_initcall+0x20c/0x4a6
        do_initcall_level+0xb5/0xc5
        do_basic_setup+0x4c/0x58
        kernel_init_freeable+0x13f/0x1dd
        kernel_init+0xe/0x105
        ret_from_fork+0x27/0x50

 -> #0 (console_owner){-...}:
        __lock_acquire+0x118d/0x2714
        lock_acquire+0x203/0x258
        console_lock_spinning_enable+0x51/0x57
        console_unlock+0x25d/0x528
        vprintk_emit+0x111/0x17f
        printk+0x59/0x73
        __report_bad_irq+0xa3/0xba
        note_interrupt+0x19a/0x1d6
        handle_irq_event_percpu+0x57/0x79
        handle_irq_event+0x36/0x55
        handle_fasteoi_irq+0xc2/0x18a
        do_IRQ+0xb3/0x157
        ret_from_intr+0x0/0x1d
        cpuidle_enter_state+0x12f/0x1fd
        cpuidle_enter+0x2e/0x3d
        do_idle+0x1ce/0x2ce
        cpu_startup_entry+0x1d/0x1f
        start_kernel+0x406/0x46a
        secondary_startup_64+0xa4/0xb0

 other info that might help us debug this:

 Chain exists of:
   console_owner --> &port_lock_key --> &irq_desc_lock_class

  Possible unsafe locking scenario:

        CPU0                    CPU1
        ----                    ----
   lock(&irq_desc_lock_class);
                                lock(&port_lock_key);
                                lock(&irq_desc_lock_class);
   lock(console_owner);

  *** DEADLOCK ***

 2 locks held by swapper/0/0:
  #0: ffff88810a8e34c0 (&irq_desc_lock_class){-.-.}, at: __report_bad_irq+0x5b/0xba
  #1: ffffffffab65b5c0 (console_lock){+.+.}, at: console_trylock_spinning+0x20/0x181

 stack backtrace:
 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.4.39 #55
 Hardware name: XXXXXX
 Call Trace:
  <IRQ>
  dump_stack+0xbf/0x133
  ? print_circular_bug+0xd6/0xe9
  check_noncircular+0x1b9/0x1c3
  __lock_acquire+0x118d/0x2714
  lock_acquire+0x203/0x258
  ? console_lock_spinning_enable+0x31/0x57
  console_lock_spinning_enable+0x51/0x57
  ? console_lock_spinning_enable+0x31/0x57
  console_unlock+0x25d/0x528
  ? console_trylock+0x18/0x4e
  vprintk_emit+0x111/0x17f
  ? lock_acquire+0x203/0x258
  printk+0x59/0x73
  __report_bad_irq+0xa3/0xba
  note_interrupt+0x19a/0x1d6
  handle_irq_event_percpu+0x57/0x79
  handle_irq_event+0x36/0x55
  handle_fasteoi_irq+0xc2/0x18a
  do_IRQ+0xb3/0x157
  common_interrupt+0xf/0xf
  </IRQ>

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Fixes: 768aec0b5bcc ("serial: 8250: fix shared interrupts issues with SMP and RT kernels")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Reported-by: Raul Rangel <rrangel@google.com>
BugLink: https://bugs.chromium.org/p/chromium/issues/detail?id=1114800
Link: https://lore.kernel.org/lkml/CAHQZ30BnfX+gxjPm1DUd5psOTqbyDh4EJE=2=VAMW_VDafctkA@mail.gmail.com/T/#u
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200817022646.1484638-1-sergey.senozhatsky@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/8250/8250_port.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 09475695effd4..e7882611da0e1 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -2275,6 +2275,10 @@ int serial8250_do_startup(struct uart_port *port)
 
 	if (port->irq && !(up->port.flags & UPF_NO_THRE_TEST)) {
 		unsigned char iir1;
+
+		if (port->irqflags & IRQF_SHARED)
+			disable_irq_nosync(port->irq);
+
 		/*
 		 * Test for UARTs that do not reassert THRE when the
 		 * transmitter is idle and the interrupt has already
@@ -2284,8 +2288,6 @@ int serial8250_do_startup(struct uart_port *port)
 		 * allow register changes to become visible.
 		 */
 		spin_lock_irqsave(&port->lock, flags);
-		if (up->port.irqflags & IRQF_SHARED)
-			disable_irq_nosync(port->irq);
 
 		wait_for_xmitr(up, UART_LSR_THRE);
 		serial_port_out_sync(port, UART_IER, UART_IER_THRI);
@@ -2297,9 +2299,10 @@ int serial8250_do_startup(struct uart_port *port)
 		iir = serial_port_in(port, UART_IIR);
 		serial_port_out(port, UART_IER, 0);
 
+		spin_unlock_irqrestore(&port->lock, flags);
+
 		if (port->irqflags & IRQF_SHARED)
 			enable_irq(port->irq);
-		spin_unlock_irqrestore(&port->lock, flags);
 
 		/*
 		 * If the interrupt is not reasserted, or we otherwise
-- 
GitLab


From 8c6c378b0cbe0c9f1390986b5f8ffb5f6ff7593b Mon Sep 17 00:00:00 2001
From: Tamseel Shams <m.shams@samsung.com>
Date: Mon, 10 Aug 2020 08:30:21 +0530
Subject: [PATCH 0236/1341] serial: samsung: Removes the IRQ not found warning

In few older Samsung SoCs like s3c2410, s3c2412
and s3c2440, UART IP is having 2 interrupt lines.
However, in other SoCs like s3c6400, s5pv210,
exynos5433, and exynos4210 UART is having only 1
interrupt line. Due to this, "platform_get_irq(platdev, 1)"
call in the driver gives the following false-positive error:
"IRQ index 1 not found" on newer SoC's.

This patch adds the condition to check for Tx interrupt
only for the those SoC's which have 2 interrupt lines.

Tested-by: Alim Akhtar <alim.akhtar@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Tamseel Shams <m.shams@samsung.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200810030021.45348-1-m.shams@samsung.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/samsung_tty.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/tty/serial/samsung_tty.c b/drivers/tty/serial/samsung_tty.c
index 8ed3482d2e1eb..8ae3e03fbd8ce 100644
--- a/drivers/tty/serial/samsung_tty.c
+++ b/drivers/tty/serial/samsung_tty.c
@@ -1905,9 +1905,11 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport,
 		ourport->tx_irq = ret + 1;
 	}
 
-	ret = platform_get_irq(platdev, 1);
-	if (ret > 0)
-		ourport->tx_irq = ret;
+	if (!s3c24xx_serial_has_interrupt_mask(port)) {
+		ret = platform_get_irq(platdev, 1);
+		if (ret > 0)
+			ourport->tx_irq = ret;
+	}
 	/*
 	 * DMA is currently supported only on DT platforms, if DMA properties
 	 * are specified.
-- 
GitLab


From ea1fc02e12b647d8dd7515d1dba137847d8e951d Mon Sep 17 00:00:00 2001
From: Fugang Duan <fugang.duan@nxp.com>
Date: Mon, 10 Aug 2020 14:06:52 +0800
Subject: [PATCH 0237/1341] tty: serial: imx: add dependence and build for
 earlycon

Add the earlycon dependence and add earlycon Makefile support
to allow to build the driver.

Fixes: 699cc4dfd140 ("tty: serial: imx: add imx earlycon driver")
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Link: https://lore.kernel.org/r/20200810060652.3436-1-fugang.duan@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/Kconfig  | 1 +
 drivers/tty/serial/Makefile | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 8a0352eb337c8..9409be982aa64 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -517,6 +517,7 @@ config SERIAL_IMX_CONSOLE
 
 config SERIAL_IMX_EARLYCON
 	bool "Earlycon on IMX serial port"
+	depends on ARCH_MXC || COMPILE_TEST
 	depends on OF
 	select SERIAL_EARLYCON
 	help
diff --git a/drivers/tty/serial/Makefile b/drivers/tty/serial/Makefile
index d056ee6cca33e..caf167f0c10a6 100644
--- a/drivers/tty/serial/Makefile
+++ b/drivers/tty/serial/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_SERIAL_ZS) += zs.o
 obj-$(CONFIG_SERIAL_SH_SCI) += sh-sci.o
 obj-$(CONFIG_SERIAL_CPM) += cpm_uart/
 obj-$(CONFIG_SERIAL_IMX) += imx.o
+obj-$(CONFIG_SERIAL_IMX_EARLYCON) += imx_earlycon.o
 obj-$(CONFIG_SERIAL_MPC52xx) += mpc52xx_uart.o
 obj-$(CONFIG_SERIAL_ICOM) += icom.o
 obj-$(CONFIG_SERIAL_MESON) += meson_uart.o
-- 
GitLab


From 51072c0f5b5e98a035c6f63b83ba2afedbb7accd Mon Sep 17 00:00:00 2001
From: Tomas Winkler <tomas.winkler@intel.com>
Date: Tue, 18 Aug 2020 10:54:06 +0300
Subject: [PATCH 0238/1341] mei: hdcp: fix mei_hdcp_verify_mprime() input
 parameter

wired_cmd_repeater_auth_stream_req_in has a variable
length array at the end. we use struct_size() overflow
macro to determine the size for the allocation and sending
size.
This also fixes bug in case number of streams is > 0 in the original
submission. This bug was not triggered as the number of streams is
always one.

Fixes: c56967d674e3 (mei: hdcp: Replace one-element array with flexible-array member)
Fixes: 0a1af1b5c18d (misc/mei/hdcp: Verify M_prime)
Cc: <stable@vger.kernel.org> # v5.1+: c56967d674e3 (mei: hdcp: Replace one-element array with flexible-array member)
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20200818075406.2532605-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/misc/mei/hdcp/mei_hdcp.c | 40 +++++++++++++++++++-------------
 1 file changed, 24 insertions(+), 16 deletions(-)

diff --git a/drivers/misc/mei/hdcp/mei_hdcp.c b/drivers/misc/mei/hdcp/mei_hdcp.c
index d1d3e025ca0e8..9ae9669e46eae 100644
--- a/drivers/misc/mei/hdcp/mei_hdcp.c
+++ b/drivers/misc/mei/hdcp/mei_hdcp.c
@@ -546,38 +546,46 @@ static int mei_hdcp_verify_mprime(struct device *dev,
 				  struct hdcp_port_data *data,
 				  struct hdcp2_rep_stream_ready *stream_ready)
 {
-	struct wired_cmd_repeater_auth_stream_req_in
-					verify_mprime_in = { { 0 } };
+	struct wired_cmd_repeater_auth_stream_req_in *verify_mprime_in;
 	struct wired_cmd_repeater_auth_stream_req_out
 					verify_mprime_out = { { 0 } };
 	struct mei_cl_device *cldev;
 	ssize_t byte;
+	size_t cmd_size;
 
 	if (!dev || !stream_ready || !data)
 		return -EINVAL;
 
 	cldev = to_mei_cl_device(dev);
 
-	verify_mprime_in.header.api_version = HDCP_API_VERSION;
-	verify_mprime_in.header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ;
-	verify_mprime_in.header.status = ME_HDCP_STATUS_SUCCESS;
-	verify_mprime_in.header.buffer_len =
+	cmd_size = struct_size(verify_mprime_in, streams, data->k);
+	if (cmd_size == SIZE_MAX)
+		return -EINVAL;
+
+	verify_mprime_in = kzalloc(cmd_size, GFP_KERNEL);
+	if (!verify_mprime_in)
+		return -ENOMEM;
+
+	verify_mprime_in->header.api_version = HDCP_API_VERSION;
+	verify_mprime_in->header.command_id = WIRED_REPEATER_AUTH_STREAM_REQ;
+	verify_mprime_in->header.status = ME_HDCP_STATUS_SUCCESS;
+	verify_mprime_in->header.buffer_len =
 			WIRED_CMD_BUF_LEN_REPEATER_AUTH_STREAM_REQ_MIN_IN;
 
-	verify_mprime_in.port.integrated_port_type = data->port_type;
-	verify_mprime_in.port.physical_port = (u8)data->fw_ddi;
-	verify_mprime_in.port.attached_transcoder = (u8)data->fw_tc;
+	verify_mprime_in->port.integrated_port_type = data->port_type;
+	verify_mprime_in->port.physical_port = (u8)data->fw_ddi;
+	verify_mprime_in->port.attached_transcoder = (u8)data->fw_tc;
+
+	memcpy(verify_mprime_in->m_prime, stream_ready->m_prime, HDCP_2_2_MPRIME_LEN);
+	drm_hdcp_cpu_to_be24(verify_mprime_in->seq_num_m, data->seq_num_m);
 
-	memcpy(verify_mprime_in.m_prime, stream_ready->m_prime,
-	       HDCP_2_2_MPRIME_LEN);
-	drm_hdcp_cpu_to_be24(verify_mprime_in.seq_num_m, data->seq_num_m);
-	memcpy(verify_mprime_in.streams, data->streams,
+	memcpy(verify_mprime_in->streams, data->streams,
 	       array_size(data->k, sizeof(*data->streams)));
 
-	verify_mprime_in.k = cpu_to_be16(data->k);
+	verify_mprime_in->k = cpu_to_be16(data->k);
 
-	byte = mei_cldev_send(cldev, (u8 *)&verify_mprime_in,
-			      sizeof(verify_mprime_in));
+	byte = mei_cldev_send(cldev, (u8 *)verify_mprime_in, cmd_size);
+	kfree(verify_mprime_in);
 	if (byte < 0) {
 		dev_dbg(dev, "mei_cldev_send failed. %zd\n", byte);
 		return byte;
-- 
GitLab


From 45bc6098a3e279d8e391d22428396687562797e2 Mon Sep 17 00:00:00 2001
From: Tony Luck <tony.luck@intel.com>
Date: Tue, 7 Jul 2020 12:43:24 -0700
Subject: [PATCH 0239/1341] EDAC/{i7core,sb,pnd2,skx}: Fix error event severity

IA32_MCG_STATUS.RIPV indicates whether the return RIP value pushed onto
the stack as part of machine check delivery is valid or not.

Various drivers copied a code fragment that uses the RIPV bit to
determine the severity of the error as either HW_EVENT_ERR_UNCORRECTED
or HW_EVENT_ERR_FATAL, but this check is reversed (marking errors where
RIPV is set as "FATAL").

Reverse the tests so that the error is marked fatal when RIPV is not set.

Reported-by: Gabriele Paoloni <gabriele.paoloni@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200707194324.14884-1-tony.luck@intel.com
---
 drivers/edac/i7core_edac.c | 4 ++--
 drivers/edac/pnd2_edac.c   | 2 +-
 drivers/edac/sb_edac.c     | 4 ++--
 drivers/edac/skx_common.c  | 4 ++--
 4 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index 5860ca41185cf..2acd9f9284a26 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -1710,9 +1710,9 @@ static void i7core_mce_output_error(struct mem_ctl_info *mci,
 	if (uncorrected_error) {
 		core_err_cnt = 1;
 		if (ripv)
-			tp_event = HW_EVENT_ERR_FATAL;
-		else
 			tp_event = HW_EVENT_ERR_UNCORRECTED;
+		else
+			tp_event = HW_EVENT_ERR_FATAL;
 	} else {
 		tp_event = HW_EVENT_ERR_CORRECTED;
 	}
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index fd363746f5b03..b8fc4b84fd867 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -1155,7 +1155,7 @@ static void pnd2_mce_output_error(struct mem_ctl_info *mci, const struct mce *m,
 	u32 optypenum = GET_BITFIELD(m->status, 4, 6);
 	int rc;
 
-	tp_event = uc_err ? (ripv ? HW_EVENT_ERR_FATAL : HW_EVENT_ERR_UNCORRECTED) :
+	tp_event = uc_err ? (ripv ? HW_EVENT_ERR_UNCORRECTED : HW_EVENT_ERR_FATAL) :
 						 HW_EVENT_ERR_CORRECTED;
 
 	/*
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index d414698ca3242..c5ab634cb6a49 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -2982,9 +2982,9 @@ static void sbridge_mce_output_error(struct mem_ctl_info *mci,
 	if (uncorrected_error) {
 		core_err_cnt = 1;
 		if (ripv) {
-			tp_event = HW_EVENT_ERR_FATAL;
-		} else {
 			tp_event = HW_EVENT_ERR_UNCORRECTED;
+		} else {
+			tp_event = HW_EVENT_ERR_FATAL;
 		}
 	} else {
 		tp_event = HW_EVENT_ERR_CORRECTED;
diff --git a/drivers/edac/skx_common.c b/drivers/edac/skx_common.c
index 6d8d6dc626bfe..2b4ce8e5ac2fa 100644
--- a/drivers/edac/skx_common.c
+++ b/drivers/edac/skx_common.c
@@ -493,9 +493,9 @@ static void skx_mce_output_error(struct mem_ctl_info *mci,
 	if (uncorrected_error) {
 		core_err_cnt = 1;
 		if (ripv) {
-			tp_event = HW_EVENT_ERR_FATAL;
-		} else {
 			tp_event = HW_EVENT_ERR_UNCORRECTED;
+		} else {
+			tp_event = HW_EVENT_ERR_FATAL;
 		}
 	} else {
 		tp_event = HW_EVENT_ERR_CORRECTED;
-- 
GitLab


From b15b4da88be52e7455acc59318f6c97b8740b329 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Tue, 4 Aug 2020 13:16:01 +0300
Subject: [PATCH 0240/1341] staging: greybus: audio: Uninitialized variable in
 gbaudio_remove_controls()

The "err" variable is not meaningful so there is no need to print it.
It's uninitialized on the first iteration through the loop.

Fixes: 510e340efe0c ("staging: greybus: audio: Add helper APIs for dynamic audio modules")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Reviewed-by: Vaibhav Agarwal <vaibhav.sr@gmail.com>
Link: https://lore.kernel.org/r/20200804101601.GA392148@mwanda
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/greybus/audio_helper.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/greybus/audio_helper.c b/drivers/staging/greybus/audio_helper.c
index 8b100a71f02ef..237531ba60f30 100644
--- a/drivers/staging/greybus/audio_helper.c
+++ b/drivers/staging/greybus/audio_helper.c
@@ -173,8 +173,7 @@ static int gbaudio_remove_controls(struct snd_card *card, struct device *dev,
 		id.index = control->index;
 		kctl = snd_ctl_find_id(card, &id);
 		if (!kctl) {
-			dev_err(dev, "%d: Failed to find %s\n", err,
-				control->name);
+			dev_err(dev, "Failed to find %s\n", control->name);
 			continue;
 		}
 		err = snd_ctl_remove(card, kctl);
-- 
GitLab


From fea22e159d51c766ba70473f473a0ec914cc7e92 Mon Sep 17 00:00:00 2001
From: Rustam Kovhaev <rkovhaev@gmail.com>
Date: Tue, 4 Aug 2020 07:56:14 -0700
Subject: [PATCH 0241/1341] staging: wlan-ng: fix out of bounds read in
 prism2sta_probe_usb()

let's use usb_find_common_endpoints() to discover endpoints, it does all
necessary checks for type and xfer direction

remove memset() in hfa384x_create(), because we now assign endpoints in
prism2sta_probe_usb() and because create_wlan() uses kzalloc() to
allocate hfa384x struct before calling hfa384x_create()

Fixes: faaff9765664 ("staging: wlan-ng: properly check endpoint types")
Reported-and-tested-by: syzbot+22794221ab96b0bab53a@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?extid=22794221ab96b0bab53a
Signed-off-by: Rustam Kovhaev <rkovhaev@gmail.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200804145614.104320-1-rkovhaev@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/wlan-ng/hfa384x_usb.c |  5 -----
 drivers/staging/wlan-ng/prism2usb.c   | 19 ++++++-------------
 2 files changed, 6 insertions(+), 18 deletions(-)

diff --git a/drivers/staging/wlan-ng/hfa384x_usb.c b/drivers/staging/wlan-ng/hfa384x_usb.c
index fa1bf8b069fda..2720f7319a3d0 100644
--- a/drivers/staging/wlan-ng/hfa384x_usb.c
+++ b/drivers/staging/wlan-ng/hfa384x_usb.c
@@ -524,13 +524,8 @@ static void hfa384x_usb_defer(struct work_struct *data)
  */
 void hfa384x_create(struct hfa384x *hw, struct usb_device *usb)
 {
-	memset(hw, 0, sizeof(*hw));
 	hw->usb = usb;
 
-	/* set up the endpoints */
-	hw->endp_in = usb_rcvbulkpipe(usb, 1);
-	hw->endp_out = usb_sndbulkpipe(usb, 2);
-
 	/* Set up the waitq */
 	init_waitqueue_head(&hw->cmdq);
 
diff --git a/drivers/staging/wlan-ng/prism2usb.c b/drivers/staging/wlan-ng/prism2usb.c
index 456603fd26c0b..4b08dc1da4f97 100644
--- a/drivers/staging/wlan-ng/prism2usb.c
+++ b/drivers/staging/wlan-ng/prism2usb.c
@@ -61,23 +61,14 @@ static int prism2sta_probe_usb(struct usb_interface *interface,
 			       const struct usb_device_id *id)
 {
 	struct usb_device *dev;
-	const struct usb_endpoint_descriptor *epd;
-	const struct usb_host_interface *iface_desc = interface->cur_altsetting;
+	struct usb_endpoint_descriptor *bulk_in, *bulk_out;
+	struct usb_host_interface *iface_desc = interface->cur_altsetting;
 	struct wlandevice *wlandev = NULL;
 	struct hfa384x *hw = NULL;
 	int result = 0;
 
-	if (iface_desc->desc.bNumEndpoints != 2) {
-		result = -ENODEV;
-		goto failed;
-	}
-
-	result = -EINVAL;
-	epd = &iface_desc->endpoint[1].desc;
-	if (!usb_endpoint_is_bulk_in(epd))
-		goto failed;
-	epd = &iface_desc->endpoint[2].desc;
-	if (!usb_endpoint_is_bulk_out(epd))
+	result = usb_find_common_endpoints(iface_desc, &bulk_in, &bulk_out, NULL, NULL);
+	if (result)
 		goto failed;
 
 	dev = interface_to_usbdev(interface);
@@ -96,6 +87,8 @@ static int prism2sta_probe_usb(struct usb_interface *interface,
 	}
 
 	/* Initialize the hw data */
+	hw->endp_in = usb_rcvbulkpipe(dev, bulk_in->bEndpointAddress);
+	hw->endp_out = usb_sndbulkpipe(dev, bulk_out->bEndpointAddress);
 	hfa384x_create(hw, dev);
 	hw->wlandev = wlandev;
 
-- 
GitLab


From 1dffeb8b8b4c261c45416d53c75ea51e6ece1770 Mon Sep 17 00:00:00 2001
From: Vaibhav Agarwal <vaibhav.sr@gmail.com>
Date: Fri, 14 Aug 2020 18:03:15 +0530
Subject: [PATCH 0242/1341] staging: greybus: audio: fix uninitialized value
 issue

The current implementation for gbcodec_mixer_dapm_ctl_put() uses
uninitialized gbvalue for comparison with updated value. This was found
using static analysis with coverity.

Uninitialized scalar variable (UNINIT)
11. uninit_use: Using uninitialized value
gbvalue.value.integer_value[0].
460        if (gbvalue.value.integer_value[0] != val) {

This patch fixes the issue with fetching the gbvalue before using it for
    comparision.

Fixes: 6339d2322c47 ("greybus: audio: Add topology parser for GB codec")
Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Vaibhav Agarwal <vaibhav.sr@gmail.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/bc4f29eb502ccf93cd2ffd98db0e319fa7d0f247.1597408126.git.vaibhav.sr@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/staging/greybus/audio_topology.c | 29 ++++++++++++------------
 1 file changed, 15 insertions(+), 14 deletions(-)

diff --git a/drivers/staging/greybus/audio_topology.c b/drivers/staging/greybus/audio_topology.c
index 2f9fdbdcd5470..83b38ae8908c1 100644
--- a/drivers/staging/greybus/audio_topology.c
+++ b/drivers/staging/greybus/audio_topology.c
@@ -456,6 +456,15 @@ static int gbcodec_mixer_dapm_ctl_put(struct snd_kcontrol *kcontrol,
 	val = ucontrol->value.integer.value[0] & mask;
 	connect = !!val;
 
+	ret = gb_pm_runtime_get_sync(bundle);
+	if (ret)
+		return ret;
+
+	ret = gb_audio_gb_get_control(module->mgmt_connection, data->ctl_id,
+				      GB_AUDIO_INVALID_INDEX, &gbvalue);
+	if (ret)
+		goto exit;
+
 	/* update ucontrol */
 	if (gbvalue.value.integer_value[0] != val) {
 		for (wi = 0; wi < wlist->num_widgets; wi++) {
@@ -466,25 +475,17 @@ static int gbcodec_mixer_dapm_ctl_put(struct snd_kcontrol *kcontrol,
 		gbvalue.value.integer_value[0] =
 			cpu_to_le32(ucontrol->value.integer.value[0]);
 
-		ret = gb_pm_runtime_get_sync(bundle);
-		if (ret)
-			return ret;
-
 		ret = gb_audio_gb_set_control(module->mgmt_connection,
 					      data->ctl_id,
 					      GB_AUDIO_INVALID_INDEX, &gbvalue);
-
-		gb_pm_runtime_put_autosuspend(bundle);
-
-		if (ret) {
-			dev_err_ratelimited(codec_dev,
-					    "%d:Error in %s for %s\n", ret,
-					    __func__, kcontrol->id.name);
-			return ret;
-		}
 	}
 
-	return 0;
+exit:
+	gb_pm_runtime_put_autosuspend(bundle);
+	if (ret)
+		dev_err_ratelimited(codec_dev, "%d:Error in %s for %s\n", ret,
+				    __func__, kcontrol->id.name);
+	return ret;
 }
 
 #define SOC_DAPM_MIXER_GB(xname, kcount, data) \
-- 
GitLab


From 2de791ab4918969d8108f15238a701968375f235 Mon Sep 17 00:00:00 2001
From: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru>
Date: Tue, 11 Aug 2020 06:43:40 +0000
Subject: [PATCH 0243/1341] bfq: fix blkio cgroup leakage v4

Changes from v1:
    - update commit description with proper ref-accounting justification

commit db37a34c563b ("block, bfq: get a ref to a group when adding it to a service tree")
introduce leak forbfq_group and blkcg_gq objects because of get/put
imbalance.
In fact whole idea of original commit is wrong because bfq_group entity
can not dissapear under us because it is referenced by child bfq_queue's
entities from here:
 -> bfq_init_entity()
    ->bfqg_and_blkg_get(bfqg);
    ->entity->parent = bfqg->my_entity

 -> bfq_put_queue(bfqq)
    FINAL_PUT
    ->bfqg_and_blkg_put(bfqq_group(bfqq))
    ->kmem_cache_free(bfq_pool, bfqq);

So parent entity can not disappear while child entity is in tree,
and child entities already has proper protection.
This patch revert commit db37a34c563b ("block, bfq: get a ref to a group when adding it to a service tree")

bfq_group leak trace caused by bad commit:
-> blkg_alloc
   -> bfq_pq_alloc
     -> bfqg_get (+1)
->bfq_activate_bfqq
  ->bfq_activate_requeue_entity
    -> __bfq_activate_entity
       ->bfq_get_entity
         ->bfqg_and_blkg_get (+1)  <==== : Note1
->bfq_del_bfqq_busy
  ->bfq_deactivate_entity+0x53/0xc0 [bfq]
    ->__bfq_deactivate_entity+0x1b8/0x210 [bfq]
      -> bfq_forget_entity(is_in_service = true)
	 entity->on_st_or_in_serv = false   <=== :Note2
	 if (is_in_service)
	     return;  ==> do not touch reference
-> blkcg_css_offline
 -> blkcg_destroy_blkgs
  -> blkg_destroy
   -> bfq_pd_offline
    -> __bfq_deactivate_entity
         if (!entity->on_st_or_in_serv) /* true, because (Note2)
		return false;
 -> bfq_pd_free
    -> bfqg_put() (-1, byt bfqg->ref == 2) because of (Note2)
So bfq_group and blkcg_gq  will leak forever, see test-case below.

##TESTCASE_BEGIN:
#!/bin/bash

max_iters=${1:-100}
#prep cgroup mounts
mount -t tmpfs cgroup_root /sys/fs/cgroup
mkdir /sys/fs/cgroup/blkio
mount -t cgroup -o blkio none /sys/fs/cgroup/blkio

# Prepare blkdev
grep blkio /proc/cgroups
truncate -s 1M img
losetup /dev/loop0 img
echo bfq > /sys/block/loop0/queue/scheduler

grep blkio /proc/cgroups
for ((i=0;i<max_iters;i++))
do
    mkdir -p /sys/fs/cgroup/blkio/a
    echo 0 > /sys/fs/cgroup/blkio/a/cgroup.procs
    dd if=/dev/loop0 bs=4k count=1 of=/dev/null iflag=direct 2> /dev/null
    echo 0 > /sys/fs/cgroup/blkio/cgroup.procs
    rmdir /sys/fs/cgroup/blkio/a
    grep blkio /proc/cgroups
done
##TESTCASE_END:

Fixes: db37a34c563b ("block, bfq: get a ref to a group when adding it to a service tree")
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Signed-off-by: Dmitry Monakhov <dmtrmonakhov@yandex-team.ru>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/bfq-cgroup.c  |  2 +-
 block/bfq-iosched.h |  1 -
 block/bfq-wf2q.c    | 12 ++----------
 3 files changed, 3 insertions(+), 12 deletions(-)

diff --git a/block/bfq-cgroup.c b/block/bfq-cgroup.c
index 68882b9b8f11f..b791e2041e49b 100644
--- a/block/bfq-cgroup.c
+++ b/block/bfq-cgroup.c
@@ -332,7 +332,7 @@ static void bfqg_put(struct bfq_group *bfqg)
 		kfree(bfqg);
 }
 
-void bfqg_and_blkg_get(struct bfq_group *bfqg)
+static void bfqg_and_blkg_get(struct bfq_group *bfqg)
 {
 	/* see comments in bfq_bic_update_cgroup for why refcounting bfqg */
 	bfqg_get(bfqg);
diff --git a/block/bfq-iosched.h b/block/bfq-iosched.h
index cd224aaf9f52a..703895224562c 100644
--- a/block/bfq-iosched.h
+++ b/block/bfq-iosched.h
@@ -986,7 +986,6 @@ struct bfq_group *bfq_find_set_group(struct bfq_data *bfqd,
 struct blkcg_gq *bfqg_to_blkg(struct bfq_group *bfqg);
 struct bfq_group *bfqq_group(struct bfq_queue *bfqq);
 struct bfq_group *bfq_create_group_hierarchy(struct bfq_data *bfqd, int node);
-void bfqg_and_blkg_get(struct bfq_group *bfqg);
 void bfqg_and_blkg_put(struct bfq_group *bfqg);
 
 #ifdef CONFIG_BFQ_GROUP_IOSCHED
diff --git a/block/bfq-wf2q.c b/block/bfq-wf2q.c
index eb0e2a6daabe6..26776bdbdf360 100644
--- a/block/bfq-wf2q.c
+++ b/block/bfq-wf2q.c
@@ -533,9 +533,7 @@ static void bfq_get_entity(struct bfq_entity *entity)
 		bfqq->ref++;
 		bfq_log_bfqq(bfqq->bfqd, bfqq, "get_entity: %p %d",
 			     bfqq, bfqq->ref);
-	} else
-		bfqg_and_blkg_get(container_of(entity, struct bfq_group,
-					       entity));
+	}
 }
 
 /**
@@ -649,14 +647,8 @@ static void bfq_forget_entity(struct bfq_service_tree *st,
 
 	entity->on_st_or_in_serv = false;
 	st->wsum -= entity->weight;
-	if (is_in_service)
-		return;
-
-	if (bfqq)
+	if (bfqq && !is_in_service)
 		bfq_put_queue(bfqq);
-	else
-		bfqg_and_blkg_put(container_of(entity, struct bfq_group,
-					       entity));
 }
 
 /**
-- 
GitLab


From 9d5cbf5fe46e350715389d89d0c350d83289a102 Mon Sep 17 00:00:00 2001
From: Krishna Manikandan <mkrishn@codeaurora.org>
Date: Mon, 1 Jun 2020 16:33:22 +0530
Subject: [PATCH 0244/1341] drm/msm: add shutdown support for display
 platform_driver

Define shutdown callback for display drm driver,
so as to disable all the CRTCS when shutdown
notification is received by the driver.

This change will turn off the timing engine so
that no display transactions are requested
while mmu translations are getting disabled
during reboot sequence.

Signed-off-by: Krishna Manikandan <mkrishn@codeaurora.org>

Changes in v2:
	- Remove NULL check from msm_pdev_shutdown (Stephen Boyd)
	- Change commit text to reflect when this issue
	  was uncovered (Sai Prakash Ranjan)

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/msm_drv.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 7d641c7e3514a..79333842f70a1 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -1320,6 +1320,13 @@ static int msm_pdev_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static void msm_pdev_shutdown(struct platform_device *pdev)
+{
+	struct drm_device *drm = platform_get_drvdata(pdev);
+
+	drm_atomic_helper_shutdown(drm);
+}
+
 static const struct of_device_id dt_match[] = {
 	{ .compatible = "qcom,mdp4", .data = (void *)KMS_MDP4 },
 	{ .compatible = "qcom,mdss", .data = (void *)KMS_MDP5 },
@@ -1332,6 +1339,7 @@ MODULE_DEVICE_TABLE(of, dt_match);
 static struct platform_driver msm_platform_driver = {
 	.probe      = msm_pdev_probe,
 	.remove     = msm_pdev_remove,
+	.shutdown   = msm_pdev_shutdown,
 	.driver     = {
 		.name   = "msm",
 		.of_match_table = dt_match,
-- 
GitLab


From d963c524a4b3a7dbb2be0cb6813dcda1c16c9171 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Wed, 5 Aug 2020 15:11:11 +0100
Subject: [PATCH 0245/1341] RDMA/hns: Fix spelling mistake "epmty" -> "empty"

There is a spelling mistake in a dev_dbg message. Fix it.

Link: https://lore.kernel.org/r/20200805141111.22804-1-colin.king@canonical.com
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v1.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
index 07b4c85d341db..aeb3a6fa7d472 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v1.c
@@ -535,7 +535,7 @@ static void hns_roce_set_sdb_ext(struct hns_roce_dev *hr_dev, u32 ext_sdb_alept,
 	roce_write(hr_dev, ROCEE_EXT_DB_SQ_H_REG, val);
 
 	dev_dbg(dev, "ext SDB depth: 0x%x\n", db->ext_db->esdb_dep);
-	dev_dbg(dev, "ext SDB threshold: epmty: 0x%x, ful: 0x%x\n",
+	dev_dbg(dev, "ext SDB threshold: empty: 0x%x, ful: 0x%x\n",
 		ext_sdb_alept, ext_sdb_alful);
 }
 
-- 
GitLab


From dfd022a9ea7ef6ffab95cfaa47aae4475a55e120 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Wed, 5 Aug 2020 15:14:59 +0100
Subject: [PATCH 0246/1341] RDMA/usnic: Fix spelling mistake "transistion" ->
 "transition"

There is a spelling mistake in a usnic_err error message. Fix it.

Link: https://lore.kernel.org/r/20200805141459.23069-1-colin.king@canonical.com
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/usnic/usnic_ib_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/usnic/usnic_ib_main.c b/drivers/infiniband/hw/usnic/usnic_ib_main.c
index c9abe1c01e4eb..662e7fc7f6283 100644
--- a/drivers/infiniband/hw/usnic/usnic_ib_main.c
+++ b/drivers/infiniband/hw/usnic/usnic_ib_main.c
@@ -120,7 +120,7 @@ static void usnic_ib_qp_grp_modify_active_to_err(struct usnic_ib_dev *us_ibdev)
 								IB_QPS_ERR,
 								NULL);
 				if (status) {
-					usnic_err("Failed to transistion qp grp %u from %s to %s\n",
+					usnic_err("Failed to transition qp grp %u from %s to %s\n",
 						qp_grp->grp_id,
 						usnic_ib_qp_grp_state_to_string
 						(cur_state),
-- 
GitLab


From e65b85dd0cf1cc2c0453756e468ee9271822ec0b Mon Sep 17 00:00:00 2001
From: Fabio Estevam <festevam@gmail.com>
Date: Tue, 18 Aug 2020 08:12:45 -0300
Subject: [PATCH 0247/1341] dt-bindings: Use Shawn Guo's preferred e-mail for
 i.MX bindings

Use Shawn Guo's kernel.org address for the i.MX related bindings
as per the MAINTAINERS entries.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20200818111245.17047-1-festevam@gmail.com
Signed-off-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/clock/imx23-clock.yaml   | 2 +-
 Documentation/devicetree/bindings/clock/imx28-clock.yaml   | 2 +-
 Documentation/devicetree/bindings/gpio/gpio-mxs.yaml       | 2 +-
 Documentation/devicetree/bindings/i2c/i2c-mxs.yaml         | 2 +-
 Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml   | 2 +-
 Documentation/devicetree/bindings/mmc/mxs-mmc.yaml         | 2 +-
 Documentation/devicetree/bindings/pwm/mxs-pwm.yaml         | 2 +-
 Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml    | 2 +-
 Documentation/devicetree/bindings/thermal/imx-thermal.yaml | 2 +-
 9 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/clock/imx23-clock.yaml b/Documentation/devicetree/bindings/clock/imx23-clock.yaml
index 66cb238a1040c..ad21899981af8 100644
--- a/Documentation/devicetree/bindings/clock/imx23-clock.yaml
+++ b/Documentation/devicetree/bindings/clock/imx23-clock.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Clock bindings for Freescale i.MX23
 
 maintainers:
-  - Shawn Guo <shawn.guo@linaro.org>
+  - Shawn Guo <shawnguo@kernel.org>
 
 description: |
   The clock consumer should specify the desired clock by having the clock
diff --git a/Documentation/devicetree/bindings/clock/imx28-clock.yaml b/Documentation/devicetree/bindings/clock/imx28-clock.yaml
index 72328d5ca09ac..f1af1108129ee 100644
--- a/Documentation/devicetree/bindings/clock/imx28-clock.yaml
+++ b/Documentation/devicetree/bindings/clock/imx28-clock.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Clock bindings for Freescale i.MX28
 
 maintainers:
-  - Shawn Guo <shawn.guo@linaro.org>
+  - Shawn Guo <shawnguo@kernel.org>
 
 description: |
   The clock consumer should specify the desired clock by having the clock
diff --git a/Documentation/devicetree/bindings/gpio/gpio-mxs.yaml b/Documentation/devicetree/bindings/gpio/gpio-mxs.yaml
index ccf5b50e798b9..dfa1133f8c5e4 100644
--- a/Documentation/devicetree/bindings/gpio/gpio-mxs.yaml
+++ b/Documentation/devicetree/bindings/gpio/gpio-mxs.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Freescale MXS GPIO controller
 
 maintainers:
-  - Shawn Guo <shawn.guo@linaro.org>
+  - Shawn Guo <shawnguo@kernel.org>
   - Anson Huang <Anson.Huang@nxp.com>
 
 description: |
diff --git a/Documentation/devicetree/bindings/i2c/i2c-mxs.yaml b/Documentation/devicetree/bindings/i2c/i2c-mxs.yaml
index d3134ed775fa2..21ae7bce038ec 100644
--- a/Documentation/devicetree/bindings/i2c/i2c-mxs.yaml
+++ b/Documentation/devicetree/bindings/i2c/i2c-mxs.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Freescale MXS Inter IC (I2C) Controller
 
 maintainers:
-  - Shawn Guo <shawn.guo@linaro.org>
+  - Shawn Guo <shawnguo@kernel.org>
 
 properties:
   compatible:
diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
index 75dc1168d7178..10b45966f1b87 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Freescale Enhanced Secure Digital Host Controller (eSDHC) for i.MX
 
 maintainers:
-  - Shawn Guo <shawn.guo@linaro.org>
+  - Shawn Guo <shawnguo@kernel.org>
 
 allOf:
   - $ref: "mmc-controller.yaml"
diff --git a/Documentation/devicetree/bindings/mmc/mxs-mmc.yaml b/Documentation/devicetree/bindings/mmc/mxs-mmc.yaml
index 1cccc0478d49b..bec8f8c71ff25 100644
--- a/Documentation/devicetree/bindings/mmc/mxs-mmc.yaml
+++ b/Documentation/devicetree/bindings/mmc/mxs-mmc.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Freescale MXS MMC controller
 
 maintainers:
-  - Shawn Guo <shawn.guo@linaro.org>
+  - Shawn Guo <shawnguo@kernel.org>
 
 description: |
   The Freescale MXS Synchronous Serial Ports (SSP) can act as a MMC controller
diff --git a/Documentation/devicetree/bindings/pwm/mxs-pwm.yaml b/Documentation/devicetree/bindings/pwm/mxs-pwm.yaml
index da68f4a25dd96..8740e076061e3 100644
--- a/Documentation/devicetree/bindings/pwm/mxs-pwm.yaml
+++ b/Documentation/devicetree/bindings/pwm/mxs-pwm.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Freescale MXS PWM controller
 
 maintainers:
-  - Shawn Guo <shawn.guo@linaro.org>
+  - Shawn Guo <shawnguo@kernel.org>
   - Anson Huang <anson.huang@nxp.com>
 
 properties:
diff --git a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml
index 1b50cedbfb3ea..50df1a40bbe34 100644
--- a/Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml
+++ b/Documentation/devicetree/bindings/spi/fsl-imx-cspi.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: Freescale (Enhanced) Configurable Serial Peripheral Interface (CSPI/eCSPI) for i.MX
 
 maintainers:
-  - Shawn Guo <shawn.guo@linaro.org>
+  - Shawn Guo <shawnguo@kernel.org>
 
 allOf:
   - $ref: "/schemas/spi/spi-controller.yaml#"
diff --git a/Documentation/devicetree/bindings/thermal/imx-thermal.yaml b/Documentation/devicetree/bindings/thermal/imx-thermal.yaml
index aedac16699982..16b57f57d1032 100644
--- a/Documentation/devicetree/bindings/thermal/imx-thermal.yaml
+++ b/Documentation/devicetree/bindings/thermal/imx-thermal.yaml
@@ -7,7 +7,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: NXP i.MX Thermal Binding
 
 maintainers:
-  - Shawn Guo <shawn.guo@linaro.org>
+  - Shawn Guo <shawnguo@kernel.org>
   - Anson Huang <Anson.Huang@nxp.com>
 
 properties:
-- 
GitLab


From 3fb1a96a91120877488071a167d26d76be4be977 Mon Sep 17 00:00:00 2001
From: Andrii Nakryiko <andriin@fb.com>
Date: Tue, 18 Aug 2020 09:44:56 -0700
Subject: [PATCH 0248/1341] libbpf: Fix build on ppc64le architecture
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

On ppc64le we get the following warning:

  In file included from btf_dump.c:16:0:
  btf_dump.c: In function ‘btf_dump_emit_struct_def’:
  ../include/linux/kernel.h:20:17: error: comparison of distinct pointer types lacks a cast [-Werror]
    (void) (&_max1 == &_max2);  \
                   ^
  btf_dump.c:882:11: note: in expansion of macro ‘max’
      m_sz = max(0LL, btf__resolve_size(d->btf, m->type));
             ^~~

Fix by explicitly casting to __s64, which is a return type from
btf__resolve_size().

Fixes: 702eddc77a90 ("libbpf: Handle GCC built-in types for Arm NEON")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200818164456.1181661-1-andriin@fb.com
---
 tools/lib/bpf/btf_dump.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/btf_dump.c b/tools/lib/bpf/btf_dump.c
index fe39bd7746976..57c00fa639329 100644
--- a/tools/lib/bpf/btf_dump.c
+++ b/tools/lib/bpf/btf_dump.c
@@ -879,7 +879,7 @@ static void btf_dump_emit_struct_def(struct btf_dump *d,
 			btf_dump_printf(d, ": %d", m_sz);
 			off = m_off + m_sz;
 		} else {
-			m_sz = max(0LL, btf__resolve_size(d->btf, m->type));
+			m_sz = max((__s64)0, btf__resolve_size(d->btf, m->type));
 			off = m_off + m_sz * 8;
 		}
 		btf_dump_printf(d, ";");
-- 
GitLab


From 303216e76dcab6049c9d42390b1032f0649a8206 Mon Sep 17 00:00:00 2001
From: Sven Eckelmann <sven@narfation.org>
Date: Wed, 22 Jul 2020 20:36:43 +0200
Subject: [PATCH 0249/1341] batman-adv: Avoid uninitialized chaddr when
 handling DHCP

The gateway client code can try to optimize the delivery of DHCP packets to
avoid broadcasting them through the whole mesh. But also transmissions to
the client can be optimized by looking up the destination via the chaddr of
the DHCP packet.

But the chaddr is currently only done when chaddr is fully inside the
non-paged area of the skbuff. Otherwise it will not be initialized and the
unoptimized path should have been taken.

But the implementation didn't handle this correctly. It didn't retrieve the
correct chaddr but still tried to perform the TT lookup with this
uninitialized memory.

Reported-by: syzbot+ab16e463b903f5a37036@syzkaller.appspotmail.com
Fixes: 6c413b1c22a2 ("batman-adv: send every DHCP packet as bat-unicast")
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Acked-by: Antonio Quartulli <a@unstable.cc>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
---
 net/batman-adv/gateway_client.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/batman-adv/gateway_client.c b/net/batman-adv/gateway_client.c
index a18dcc686dc31..ef3f85b576c4c 100644
--- a/net/batman-adv/gateway_client.c
+++ b/net/batman-adv/gateway_client.c
@@ -703,8 +703,10 @@ batadv_gw_dhcp_recipient_get(struct sk_buff *skb, unsigned int *header_len,
 
 	chaddr_offset = *header_len + BATADV_DHCP_CHADDR_OFFSET;
 	/* store the client address if the message is going to a client */
-	if (ret == BATADV_DHCP_TO_CLIENT &&
-	    pskb_may_pull(skb, chaddr_offset + ETH_ALEN)) {
+	if (ret == BATADV_DHCP_TO_CLIENT) {
+		if (!pskb_may_pull(skb, chaddr_offset + ETH_ALEN))
+			return BATADV_DHCP_NO;
+
 		/* check if the DHCP packet carries an Ethernet DHCP */
 		p = skb->data + *header_len + BATADV_DHCP_HTYPE_OFFSET;
 		if (*p != BATADV_DHCP_HTYPE_ETHERNET)
-- 
GitLab


From d8bf0c01642275c7dca1e5d02c34e4199c200b1f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Linus=20L=C3=BCssing?= <linus.luessing@c0d3.blue>
Date: Thu, 23 Jul 2020 14:28:08 +0200
Subject: [PATCH 0250/1341] batman-adv: Fix own OGM check in aggregated OGMs
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The own OGM check is currently misplaced and can lead to the following
issues:

For one thing we might receive an aggregated OGM from a neighbor node
which has our own OGM in the first place. We would then not only skip
our own OGM but erroneously also any other, following OGM in the
aggregate.

For another, we might receive an OGM aggregate which has our own OGM in
a place other then the first one. Then we would wrongly not skip this
OGM, leading to populating the orginator and gateway table with ourself.

Fixes: 9323158ef9f4 ("batman-adv: OGMv2 - implement originators logic")
Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
---
 net/batman-adv/bat_v_ogm.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/net/batman-adv/bat_v_ogm.c b/net/batman-adv/bat_v_ogm.c
index 0f8495b9eeb12..717fe657561d9 100644
--- a/net/batman-adv/bat_v_ogm.c
+++ b/net/batman-adv/bat_v_ogm.c
@@ -881,6 +881,12 @@ static void batadv_v_ogm_process(const struct sk_buff *skb, int ogm_offset,
 		   ntohl(ogm_packet->seqno), ogm_throughput, ogm_packet->ttl,
 		   ogm_packet->version, ntohs(ogm_packet->tvlv_len));
 
+	if (batadv_is_my_mac(bat_priv, ogm_packet->orig)) {
+		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
+			   "Drop packet: originator packet from ourself\n");
+		return;
+	}
+
 	/* If the throughput metric is 0, immediately drop the packet. No need
 	 * to create orig_node / neigh_node for an unusable route.
 	 */
@@ -1008,11 +1014,6 @@ int batadv_v_ogm_packet_recv(struct sk_buff *skb,
 	if (batadv_is_my_mac(bat_priv, ethhdr->h_source))
 		goto free_skb;
 
-	ogm_packet = (struct batadv_ogm2_packet *)skb->data;
-
-	if (batadv_is_my_mac(bat_priv, ogm_packet->orig))
-		goto free_skb;
-
 	batadv_inc_counter(bat_priv, BATADV_CNT_MGMT_RX);
 	batadv_add_counter(bat_priv, BATADV_CNT_MGMT_RX_BYTES,
 			   skb->len + ETH_HLEN);
-- 
GitLab


From 279e89b2281af3b1a9f04906e157992c19c9f163 Mon Sep 17 00:00:00 2001
From: Jussi Kivilinna <jussi.kivilinna@haltian.com>
Date: Tue, 18 Aug 2020 17:46:10 +0300
Subject: [PATCH 0251/1341] batman-adv: bla: use netif_rx_ni when not in
 interrupt context

batadv_bla_send_claim() gets called from worker thread context through
batadv_bla_periodic_work(), thus netif_rx_ni needs to be used in that
case. This fixes "NOHZ: local_softirq_pending 08" log messages seen
when batman-adv is enabled.

Fixes: 23721387c409 ("batman-adv: add basic bridge loop avoidance code")
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@haltian.com>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
---
 net/batman-adv/bridge_loop_avoidance.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/batman-adv/bridge_loop_avoidance.c b/net/batman-adv/bridge_loop_avoidance.c
index 91a04ca373dc1..8500f56cbd10c 100644
--- a/net/batman-adv/bridge_loop_avoidance.c
+++ b/net/batman-adv/bridge_loop_avoidance.c
@@ -437,7 +437,10 @@ static void batadv_bla_send_claim(struct batadv_priv *bat_priv, u8 *mac,
 	batadv_add_counter(bat_priv, BATADV_CNT_RX_BYTES,
 			   skb->len + ETH_HLEN);
 
-	netif_rx(skb);
+	if (in_interrupt())
+		netif_rx(skb);
+	else
+		netif_rx_ni(skb);
 out:
 	if (primary_if)
 		batadv_hardif_put(primary_if);
-- 
GitLab


From 5b0545dc184442fa509a311b8c855370441ad5bc Mon Sep 17 00:00:00 2001
From: Jiri Kosina <jkosina@suse.cz>
Date: Tue, 18 Aug 2020 19:54:04 +0200
Subject: [PATCH 0252/1341] Revert "HID: usbhid: do not sleep when opening
 device"

This reverts commit d3132792285859253c466354fd8d54d1fe0ba786.

This patch causes a regression with quite a few devices, as probing fails
because of the race where the first IRQ is dropped on the floor (after
hid_device_io_start() happens, but before the 50ms timeout passess), and
report descriptor never gets parsed and populated.

As this is just a boot time micro-optimization, let's revert the
patch for 5.9 now, and fix this properly eventually for next merge
window.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=208935
Reported-by: Johannes Hirte <johannes.hirte@datenkhaos.de>
Reported-by: Marius Zachmann <mail@mariuszachmann.de>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/usbhid/hid-core.c | 53 ++++++++++++++++-------------------
 drivers/hid/usbhid/usbhid.h   |  2 --
 2 files changed, 24 insertions(+), 31 deletions(-)

diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c
index 492dd641a25df..17a29ee0ac6c2 100644
--- a/drivers/hid/usbhid/hid-core.c
+++ b/drivers/hid/usbhid/hid-core.c
@@ -26,7 +26,6 @@
 #include <linux/wait.h>
 #include <linux/workqueue.h>
 #include <linux/string.h>
-#include <linux/timekeeping.h>
 
 #include <linux/usb.h>
 
@@ -96,18 +95,6 @@ static int hid_start_in(struct hid_device *hid)
 				set_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
 		} else {
 			clear_bit(HID_NO_BANDWIDTH, &usbhid->iofl);
-
-			if (test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
-				/*
-				 * In case events are generated while nobody was
-				 * listening, some are released when the device
-				 * is re-opened. Wait 50 msec for the queue to
-				 * empty before allowing events to go through
-				 * hid.
-				 */
-				usbhid->input_start_time =
-					ktime_add_ms(ktime_get_coarse(), 50);
-			}
 		}
 	}
 	spin_unlock_irqrestore(&usbhid->lock, flags);
@@ -293,23 +280,20 @@ static void hid_irq_in(struct urb *urb)
 		if (!test_bit(HID_OPENED, &usbhid->iofl))
 			break;
 		usbhid_mark_busy(usbhid);
-		if (test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
-			if (ktime_before(ktime_get_coarse(),
-					 usbhid->input_start_time))
-				break;
-			clear_bit(HID_RESUME_RUNNING, &usbhid->iofl);
+		if (!test_bit(HID_RESUME_RUNNING, &usbhid->iofl)) {
+			hid_input_report(urb->context, HID_INPUT_REPORT,
+					 urb->transfer_buffer,
+					 urb->actual_length, 1);
+			/*
+			 * autosuspend refused while keys are pressed
+			 * because most keyboards don't wake up when
+			 * a key is released
+			 */
+			if (hid_check_keys_pressed(hid))
+				set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
+			else
+				clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 		}
-		hid_input_report(urb->context, HID_INPUT_REPORT,
-				 urb->transfer_buffer, urb->actual_length, 1);
-		/*
-		 * autosuspend refused while keys are pressed
-		 * because most keyboards don't wake up when
-		 * a key is released
-		 */
-		if (hid_check_keys_pressed(hid))
-			set_bit(HID_KEYS_PRESSED, &usbhid->iofl);
-		else
-			clear_bit(HID_KEYS_PRESSED, &usbhid->iofl);
 		break;
 	case -EPIPE:		/* stall */
 		usbhid_mark_busy(usbhid);
@@ -736,6 +720,17 @@ static int usbhid_open(struct hid_device *hid)
 
 	usb_autopm_put_interface(usbhid->intf);
 
+	/*
+	 * In case events are generated while nobody was listening,
+	 * some are released when the device is re-opened.
+	 * Wait 50 msec for the queue to empty before allowing events
+	 * to go through hid.
+	 */
+	if (res == 0)
+		msleep(50);
+
+	clear_bit(HID_RESUME_RUNNING, &usbhid->iofl);
+
  Done:
 	mutex_unlock(&usbhid->mutex);
 	return res;
diff --git a/drivers/hid/usbhid/usbhid.h b/drivers/hid/usbhid/usbhid.h
index c6ad684d099a1..75fe85d3d27a0 100644
--- a/drivers/hid/usbhid/usbhid.h
+++ b/drivers/hid/usbhid/usbhid.h
@@ -13,7 +13,6 @@
 
 #include <linux/types.h>
 #include <linux/slab.h>
-#include <linux/ktime.h>
 #include <linux/list.h>
 #include <linux/mutex.h>
 #include <linux/timer.h>
@@ -84,7 +83,6 @@ struct usbhid_device {
 	struct mutex mutex;						/* start/stop/open/close */
 	spinlock_t lock;						/* fifo spinlock */
 	unsigned long iofl;                                             /* I/O flags (CTRL_RUNNING, OUT_RUNNING) */
-	ktime_t input_start_time;					/* When to start handling input */
 	struct timer_list io_retry;                                     /* Retry timer */
 	unsigned long stop_retry;                                       /* Time to give up, in jiffies */
 	unsigned int retry_delay;                                       /* Delay length in ms */
-- 
GitLab


From e9a3cd48d65307b1a489300d7e3e0b28ae94dbfd Mon Sep 17 00:00:00 2001
From: brookxu <brookxu.cn@gmail.com>
Date: Fri, 7 Aug 2020 22:01:23 +0800
Subject: [PATCH 0253/1341] ext4: fix typos in ext4_mb_regular_allocator()
 comment

Fix typos in ext4_mb_regular_allocator() comment

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://lore.kernel.org/r/d6514145-73b3-808b-ec5a-a8be27c51f9c@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/mballoc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 8b8c84db243a9..5be24244426ab 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2332,8 +2332,8 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 		goto out;
 
 	/*
-	 * ac->ac2_order is set only if the fe_len is a power of 2
-	 * if ac2_order is set we also set criteria to 0 so that we
+	 * ac->ac_2order is set only if the fe_len is a power of 2
+	 * if ac->ac_2order is set we also set criteria to 0 so that we
 	 * try exact allocation using buddy.
 	 */
 	i = fls(ac->ac_g_ex.fe_len);
-- 
GitLab


From 051e2ce8cb90592c8acdc7056ffed966310d91b4 Mon Sep 17 00:00:00 2001
From: brookxu <brookxu.cn@gmail.com>
Date: Fri, 7 Aug 2020 22:01:33 +0800
Subject: [PATCH 0254/1341] ext4: delete invalid comments near
 ext4_mb_check_limits()

These comments do not seem to be related to ext4_mb_check_limits(),
it may be invalid.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/c49faf0c-d5d5-9c51-6911-9e0ff57c6bfa@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/mballoc.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 5be24244426ab..63ffd0057471e 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1740,10 +1740,6 @@ static void ext4_mb_use_best_found(struct ext4_allocation_context *ac,
 
 }
 
-/*
- * regular allocator, for general purposes allocation
- */
-
 static void ext4_mb_check_limits(struct ext4_allocation_context *ac,
 					struct ext4_buddy *e4b,
 					int finish_group)
-- 
GitLab


From dddcd2f9ebdeca9fbd36526e950bbcd0f7c1765f Mon Sep 17 00:00:00 2001
From: brookxu <brookxu.cn@gmail.com>
Date: Fri, 7 Aug 2020 22:01:39 +0800
Subject: [PATCH 0255/1341] ext4: optimize the implementation of
 ext4_mb_good_group()

It might be better to adjust the code in two places:
1. Determine whether grp is currupt or not should be placed first.
2. (cr<=2 && free <ac->ac_g_ex.fe_len)should may belong to the crx
   strategy, and it may be more appropriate to put it in the
   subsequent switch statement block. For cr1, cr2, the conditions
   in switch potentially realize the above judgment. For cr0, we
   should add (free <ac->ac_g_ex.fe_len) judgment, and then delete
   (free / fragments) >= ac->ac_g_ex.fe_len), because cr0 returns
   true by default.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/e20b2d8f-1154-adb7-3831-a9e11ba842e9@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/mballoc.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 63ffd0057471e..f68730eec2055 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2112,13 +2112,11 @@ static bool ext4_mb_good_group(struct ext4_allocation_context *ac,
 
 	BUG_ON(cr < 0 || cr >= 4);
 
-	free = grp->bb_free;
-	if (free == 0)
-		return false;
-	if (cr <= 2 && free < ac->ac_g_ex.fe_len)
+	if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(grp)))
 		return false;
 
-	if (unlikely(EXT4_MB_GRP_BBITMAP_CORRUPT(grp)))
+	free = grp->bb_free;
+	if (free == 0)
 		return false;
 
 	fragments = grp->bb_fragments;
@@ -2135,8 +2133,10 @@ static bool ext4_mb_good_group(struct ext4_allocation_context *ac,
 		    ((group % flex_size) == 0))
 			return false;
 
-		if ((ac->ac_2order > ac->ac_sb->s_blocksize_bits+1) ||
-		    (free / fragments) >= ac->ac_g_ex.fe_len)
+		if (free < ac->ac_g_ex.fe_len)
+			return false;
+
+		if (ac->ac_2order > ac->ac_sb->s_blocksize_bits+1)
 			return true;
 
 		if (grp->bb_largest_free_order < ac->ac_2order)
-- 
GitLab


From e0d438c72abe0cb000d67c0795b0341f9e763836 Mon Sep 17 00:00:00 2001
From: Xu Wang <vulab@iscas.ac.cn>
Date: Mon, 10 Aug 2020 02:21:58 +0000
Subject: [PATCH 0256/1341] mballoc: replace seq_printf with seq_puts

seq_puts is a lot cheaper than seq_printf, so use that to print
literal strings.

Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200810022158.9167-1-vulab@iscas.ac.cn
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/mballoc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index f68730eec2055..51e2fe6094bea 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2558,7 +2558,7 @@ static int ext4_mb_seq_groups_show(struct seq_file *seq, void *v)
 	for (i = 0; i <= 13; i++)
 		seq_printf(seq, " %-5u", i <= blocksize_bits + 1 ?
 				sg.info.bb_counters[i] : 0);
-	seq_printf(seq, " ]\n");
+	seq_puts(seq, " ]\n");
 
 	return 0;
 }
-- 
GitLab


From 2fe34d2938181b26f86bceb7b87fbf7370bd92c4 Mon Sep 17 00:00:00 2001
From: Kyoungho Koo <rnrudgh@gmail.com>
Date: Mon, 10 Aug 2020 17:07:05 +0900
Subject: [PATCH 0257/1341] ext4: remove unused parameter of
 ext4_generic_delete_entry function

The ext4_generic_delete_entry function does not use the parameter
handle, so it can be removed.

Signed-off-by: Kyoungho Koo <rnrudgh@gmail.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200810080701.GA14160@koo-Z370-HD3
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/ext4.h   | 3 +--
 fs/ext4/inline.c | 2 +-
 fs/ext4/namei.c  | 6 ++----
 3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 3994f012a9de7..71b4370a3f91c 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2802,8 +2802,7 @@ extern int ext4_search_dir(struct buffer_head *bh,
 			   struct ext4_filename *fname,
 			   unsigned int offset,
 			   struct ext4_dir_entry_2 **res_dir);
-extern int ext4_generic_delete_entry(handle_t *handle,
-				     struct inode *dir,
+extern int ext4_generic_delete_entry(struct inode *dir,
 				     struct ext4_dir_entry_2 *de_del,
 				     struct buffer_head *bh,
 				     void *entry_buf,
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index c3a1ad2db1227..13054653a06a3 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1706,7 +1706,7 @@ int ext4_delete_inline_entry(handle_t *handle,
 	if (err)
 		goto out;
 
-	err = ext4_generic_delete_entry(handle, dir, de_del, bh,
+	err = ext4_generic_delete_entry(dir, de_del, bh,
 					inline_start, inline_size, 0);
 	if (err)
 		goto out;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index b92571beab727..153a9fbe1dd06 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -2465,8 +2465,7 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname,
  * ext4_generic_delete_entry deletes a directory entry by merging it
  * with the previous entry
  */
-int ext4_generic_delete_entry(handle_t *handle,
-			      struct inode *dir,
+int ext4_generic_delete_entry(struct inode *dir,
 			      struct ext4_dir_entry_2 *de_del,
 			      struct buffer_head *bh,
 			      void *entry_buf,
@@ -2527,8 +2526,7 @@ static int ext4_delete_entry(handle_t *handle,
 	if (unlikely(err))
 		goto out;
 
-	err = ext4_generic_delete_entry(handle, dir, de_del,
-					bh, bh->b_data,
+	err = ext4_generic_delete_entry(dir, de_del, bh, bh->b_data,
 					dir->i_sb->s_blocksize, csum_size);
 	if (err)
 		goto out;
-- 
GitLab


From 70d7ced2ed4dc3f7f21b4f4fec0e5be5c2a5a55c Mon Sep 17 00:00:00 2001
From: Shijie Luo <luoshijie1@huawei.com>
Date: Mon, 10 Aug 2020 07:44:35 -0400
Subject: [PATCH 0258/1341] ext4: change to use fallthrough macro

Change to use fallthrough macro in switch case.

Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Link: https://lore.kernel.org/r/20200810114435.24182-1-luoshijie1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/hash.c     |  4 ++--
 fs/ext4/indirect.c | 12 ++++++------
 fs/ext4/readpage.c |  4 ++--
 3 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/fs/ext4/hash.c b/fs/ext4/hash.c
index 3e133793a5a34..2924261226e0f 100644
--- a/fs/ext4/hash.c
+++ b/fs/ext4/hash.c
@@ -233,7 +233,7 @@ static int __ext4fs_dirhash(const char *name, int len,
 		break;
 	case DX_HASH_HALF_MD4_UNSIGNED:
 		str2hashbuf = str2hashbuf_unsigned;
-		/* fall through */
+		fallthrough;
 	case DX_HASH_HALF_MD4:
 		p = name;
 		while (len > 0) {
@@ -247,7 +247,7 @@ static int __ext4fs_dirhash(const char *name, int len,
 		break;
 	case DX_HASH_TEA_UNSIGNED:
 		str2hashbuf = str2hashbuf_unsigned;
-		/* fall through */
+		fallthrough;
 	case DX_HASH_TEA:
 		p = name;
 		while (len > 0) {
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 4026418257121..433ca8415c5ab 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -1180,21 +1180,21 @@ void ext4_ind_truncate(handle_t *handle, struct inode *inode)
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
 			i_data[EXT4_IND_BLOCK] = 0;
 		}
-		/* fall through */
+		fallthrough;
 	case EXT4_IND_BLOCK:
 		nr = i_data[EXT4_DIND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
 			i_data[EXT4_DIND_BLOCK] = 0;
 		}
-		/* fall through */
+		fallthrough;
 	case EXT4_DIND_BLOCK:
 		nr = i_data[EXT4_TIND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
 			i_data[EXT4_TIND_BLOCK] = 0;
 		}
-		/* fall through */
+		fallthrough;
 	case EXT4_TIND_BLOCK:
 		;
 	}
@@ -1434,7 +1434,7 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
 			i_data[EXT4_IND_BLOCK] = 0;
 		}
-		/* fall through */
+		fallthrough;
 	case EXT4_IND_BLOCK:
 		if (++n >= n2)
 			break;
@@ -1443,7 +1443,7 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
 			i_data[EXT4_DIND_BLOCK] = 0;
 		}
-		/* fall through */
+		fallthrough;
 	case EXT4_DIND_BLOCK:
 		if (++n >= n2)
 			break;
@@ -1452,7 +1452,7 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
 			i_data[EXT4_TIND_BLOCK] = 0;
 		}
-		/* fall through */
+		fallthrough;
 	case EXT4_TIND_BLOCK:
 		;
 	}
diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index 5761e9961682e..153a838e9e3c4 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -140,7 +140,7 @@ static void bio_post_read_processing(struct bio_post_read_ctx *ctx)
 			return;
 		}
 		ctx->cur_step++;
-		/* fall-through */
+		fallthrough;
 	case STEP_VERITY:
 		if (ctx->enabled_steps & (1 << STEP_VERITY)) {
 			INIT_WORK(&ctx->work, verity_work);
@@ -148,7 +148,7 @@ static void bio_post_read_processing(struct bio_post_read_ctx *ctx)
 			return;
 		}
 		ctx->cur_step++;
-		/* fall-through */
+		fallthrough;
 	default:
 		__read_end_io(ctx->bio);
 	}
-- 
GitLab


From 8b61fba503904acae24aeb2bd5569b4d6544d48f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alvin=20=C5=A0ipraga?= <alsi@bang-olufsen.dk>
Date: Tue, 18 Aug 2020 10:51:34 +0200
Subject: [PATCH 0259/1341] macvlan: validate setting of multiple remote source
 MAC addresses
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Remote source MAC addresses can be set on a 'source mode' macvlan
interface via the IFLA_MACVLAN_MACADDR_DATA attribute. This commit
tightens the validation of these MAC addresses to match the validation
already performed when setting or adding a single MAC address via the
IFLA_MACVLAN_MACADDR attribute.

iproute2 uses IFLA_MACVLAN_MACADDR_DATA for its 'macvlan macaddr set'
command, and IFLA_MACVLAN_MACADDR for its 'macvlan macaddr add' command,
which demonstrates the inconsistent behaviour that this commit
addresses:

 # ip link add link eth0 name macvlan0 type macvlan mode source
 # ip link set link dev macvlan0 type macvlan macaddr add 01:00:00:00:00:00
 RTNETLINK answers: Cannot assign requested address
 # ip link set link dev macvlan0 type macvlan macaddr set 01:00:00:00:00:00
 # ip -d link show macvlan0
 5: macvlan0@eth0: <BROADCAST,MULTICAST,DYNAMIC,UP,LOWER_UP> mtu 1500 ...
     link/ether 2e:ac:fd:2d:69:f8 brd ff:ff:ff:ff:ff:ff promiscuity 0
     macvlan mode source remotes (1) 01:00:00:00:00:00 numtxqueues 1 ...

With this change, the 'set' command will (rightly) fail in the same way
as the 'add' command.

Signed-off-by: Alvin Šipraga <alsi@bang-olufsen.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/macvlan.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 4942f6112e51f..5da04e9979894 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -1269,6 +1269,9 @@ static void macvlan_port_destroy(struct net_device *dev)
 static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[],
 			    struct netlink_ext_ack *extack)
 {
+	struct nlattr *nla, *head;
+	int rem, len;
+
 	if (tb[IFLA_ADDRESS]) {
 		if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
 			return -EINVAL;
@@ -1316,6 +1319,20 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[],
 			return -EADDRNOTAVAIL;
 	}
 
+	if (data[IFLA_MACVLAN_MACADDR_DATA]) {
+		head = nla_data(data[IFLA_MACVLAN_MACADDR_DATA]);
+		len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]);
+
+		nla_for_each_attr(nla, head, len, rem) {
+			if (nla_type(nla) != IFLA_MACVLAN_MACADDR ||
+			    nla_len(nla) != ETH_ALEN)
+				return -EINVAL;
+
+			if (!is_valid_ether_addr(nla_data(nla)))
+				return -EADDRNOTAVAIL;
+		}
+	}
+
 	if (data[IFLA_MACVLAN_MACADDR_COUNT])
 		return -EINVAL;
 
@@ -1372,10 +1389,6 @@ static int macvlan_changelink_sources(struct macvlan_dev *vlan, u32 mode,
 		len = nla_len(data[IFLA_MACVLAN_MACADDR_DATA]);
 
 		nla_for_each_attr(nla, head, len, rem) {
-			if (nla_type(nla) != IFLA_MACVLAN_MACADDR ||
-			    nla_len(nla) != ETH_ALEN)
-				continue;
-
 			addr = nla_data(nla);
 			ret = macvlan_hash_add_source(vlan, addr);
 			if (ret)
-- 
GitLab


From db06ea341fcd1752fbdb58454507faa140e3842f Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree@solarflare.com>
Date: Tue, 18 Aug 2020 13:43:30 +0100
Subject: [PATCH 0260/1341] sfc: really check hash is valid before using it

Actually hook up the .rx_buf_hash_valid method in EF100's nic_type.

Fixes: 068885434ccb ("sfc: check hash is valid before using it")
Reported-by: Martin Habets <mhabets@solarflare.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/sfc/ef100_nic.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c
index 206d70f9d95b0..b8a7e9ed79136 100644
--- a/drivers/net/ethernet/sfc/ef100_nic.c
+++ b/drivers/net/ethernet/sfc/ef100_nic.c
@@ -739,6 +739,7 @@ const struct efx_nic_type ef100_pf_nic_type = {
 	.rx_remove = efx_mcdi_rx_remove,
 	.rx_write = ef100_rx_write,
 	.rx_packet = __ef100_rx_packet,
+	.rx_buf_hash_valid = ef100_rx_buf_hash_valid,
 	.fini_dmaq = efx_fini_dmaq,
 	.max_rx_ip_filters = EFX_MCDI_FILTER_TBL_ROWS,
 	.filter_table_probe = ef100_filter_table_up,
@@ -820,6 +821,7 @@ const struct efx_nic_type ef100_vf_nic_type = {
 	.rx_remove = efx_mcdi_rx_remove,
 	.rx_write = ef100_rx_write,
 	.rx_packet = __ef100_rx_packet,
+	.rx_buf_hash_valid = ef100_rx_buf_hash_valid,
 	.fini_dmaq = efx_fini_dmaq,
 	.max_rx_ip_filters = EFX_MCDI_FILTER_TBL_ROWS,
 	.filter_table_probe = ef100_filter_table_up,
-- 
GitLab


From 9cbbc451098ec1e9942886023203b2247dec94bd Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree@solarflare.com>
Date: Tue, 18 Aug 2020 13:43:57 +0100
Subject: [PATCH 0261/1341] sfc: take correct lock in ef100_reset()

When downing and upping the ef100 filter table, we need to take a write
 lock on efx->filter_sem, not just a read lock, because we may kfree()
 the table pointers.
Without this, resets cause a WARN_ON from efx_rwsem_assert_write_locked().

Fixes: a9dc3d5612ce ("sfc_ef100: RX filter table management and related gubbins")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/sfc/ef100_nic.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/sfc/ef100_nic.c b/drivers/net/ethernet/sfc/ef100_nic.c
index b8a7e9ed79136..19fe86b3b3169 100644
--- a/drivers/net/ethernet/sfc/ef100_nic.c
+++ b/drivers/net/ethernet/sfc/ef100_nic.c
@@ -431,18 +431,18 @@ static int ef100_reset(struct efx_nic *efx, enum reset_type reset_type)
 		/* A RESET_TYPE_ALL will cause filters to be removed, so we remove filters
 		 * and reprobe after reset to avoid removing filters twice
 		 */
-		down_read(&efx->filter_sem);
+		down_write(&efx->filter_sem);
 		ef100_filter_table_down(efx);
-		up_read(&efx->filter_sem);
+		up_write(&efx->filter_sem);
 		rc = efx_mcdi_reset(efx, reset_type);
 		if (rc)
 			return rc;
 
 		netif_device_attach(efx->net_dev);
 
-		down_read(&efx->filter_sem);
+		down_write(&efx->filter_sem);
 		rc = ef100_filter_table_up(efx);
-		up_read(&efx->filter_sem);
+		up_write(&efx->filter_sem);
 		if (rc)
 			return rc;
 
-- 
GitLab


From 788f920a0f137baa4dbc1efdd5039c4a0a01b8d7 Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree@solarflare.com>
Date: Tue, 18 Aug 2020 13:44:18 +0100
Subject: [PATCH 0262/1341] sfc: null out channel->rps_flow_id after freeing it

If an ef100_net_open() fails, ef100_net_stop() may be called without
 channel->rps_flow_id having been written; thus it may hold the address
 freed by a previous ef100_net_stop()'s call to efx_remove_filters().
 This then causes a double-free when efx_remove_filters() is called
 again, leading to a panic.
To prevent this, after freeing it, overwrite it with NULL.

Fixes: a9dc3d5612ce ("sfc_ef100: RX filter table management and related gubbins")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/sfc/rx_common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/sfc/rx_common.c b/drivers/net/ethernet/sfc/rx_common.c
index ef9bca92b0b79..5e29284c89c98 100644
--- a/drivers/net/ethernet/sfc/rx_common.c
+++ b/drivers/net/ethernet/sfc/rx_common.c
@@ -849,6 +849,7 @@ void efx_remove_filters(struct efx_nic *efx)
 	efx_for_each_channel(channel, efx) {
 		cancel_delayed_work_sync(&channel->filter_work);
 		kfree(channel->rps_flow_id);
+		channel->rps_flow_id = NULL;
 	}
 #endif
 	down_write(&efx->filter_sem);
-- 
GitLab


From e6a43910d55d09dae65772ad571d4c61e459b17a Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree@solarflare.com>
Date: Tue, 18 Aug 2020 13:44:50 +0100
Subject: [PATCH 0263/1341] sfc: don't free_irq()s if they were never requested

If efx_nic_init_interrupt fails, or was never run (e.g. due to an earlier
 failure in ef100_net_open), freeing irqs in efx_nic_fini_interrupt is not
 needed and will cause error messages and stack traces.
So instead, only do this if efx_nic_init_interrupt successfully completed,
 as indicated by the new efx->irqs_hooked flag.

Fixes: 965b549f3c20 ("sfc_ef100: implement ndo_open/close and EVQ probing")
Signed-off-by: Edward Cree <ecree@solarflare.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/sfc/net_driver.h | 2 ++
 drivers/net/ethernet/sfc/nic.c        | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/drivers/net/ethernet/sfc/net_driver.h b/drivers/net/ethernet/sfc/net_driver.h
index dcb741d8bd119..062462a138475 100644
--- a/drivers/net/ethernet/sfc/net_driver.h
+++ b/drivers/net/ethernet/sfc/net_driver.h
@@ -846,6 +846,7 @@ struct efx_async_filter_insertion {
  * @timer_quantum_ns: Interrupt timer quantum, in nanoseconds
  * @timer_max_ns: Interrupt timer maximum value, in nanoseconds
  * @irq_rx_adaptive: Adaptive IRQ moderation enabled for RX event queues
+ * @irqs_hooked: Channel interrupts are hooked
  * @irq_rx_mod_step_us: Step size for IRQ moderation for RX event queues
  * @irq_rx_moderation_us: IRQ moderation time for RX event queues
  * @msg_enable: Log message enable flags
@@ -1004,6 +1005,7 @@ struct efx_nic {
 	unsigned int timer_quantum_ns;
 	unsigned int timer_max_ns;
 	bool irq_rx_adaptive;
+	bool irqs_hooked;
 	unsigned int irq_mod_step_us;
 	unsigned int irq_rx_moderation_us;
 	u32 msg_enable;
diff --git a/drivers/net/ethernet/sfc/nic.c b/drivers/net/ethernet/sfc/nic.c
index d994d136bb038..d1e908846f5dd 100644
--- a/drivers/net/ethernet/sfc/nic.c
+++ b/drivers/net/ethernet/sfc/nic.c
@@ -129,6 +129,7 @@ int efx_nic_init_interrupt(struct efx_nic *efx)
 #endif
 	}
 
+	efx->irqs_hooked = true;
 	return 0;
 
  fail2:
@@ -154,6 +155,8 @@ void efx_nic_fini_interrupt(struct efx_nic *efx)
 	efx->net_dev->rx_cpu_rmap = NULL;
 #endif
 
+	if (!efx->irqs_hooked)
+		return;
 	if (EFX_INT_MODE_USE_MSI(efx)) {
 		/* Disable MSI/MSI-X interrupts */
 		efx_for_each_channel(channel, efx)
@@ -163,6 +166,7 @@ void efx_nic_fini_interrupt(struct efx_nic *efx)
 		/* Disable legacy interrupt */
 		free_irq(efx->legacy_irq, efx);
 	}
+	efx->irqs_hooked = false;
 }
 
 /* Register dump */
-- 
GitLab


From 335956421c86f64fd46186d76d3961f6adcff187 Mon Sep 17 00:00:00 2001
From: Ganji Aravind <ganji.aravind@chelsio.com>
Date: Tue, 18 Aug 2020 21:10:57 +0530
Subject: [PATCH 0264/1341] cxgb4: Fix work request size calculation for
 loopback test

Work request used for sending loopback packet needs to add
the firmware work request only once. So, fix by using
correct structure size.

Fixes: 7235ffae3d2c ("cxgb4: add loopback ethtool self-test")
Signed-off-by: Ganji Aravind <ganji.aravind@chelsio.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/chelsio/cxgb4/sge.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index d2b587d1670aa..7c9fe4bc235bb 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -2553,8 +2553,8 @@ int cxgb4_selftest_lb_pkt(struct net_device *netdev)
 
 	pkt_len = ETH_HLEN + sizeof(CXGB4_SELFTEST_LB_STR);
 
-	flits = DIV_ROUND_UP(pkt_len + sizeof(struct cpl_tx_pkt) +
-			     sizeof(*wr), sizeof(__be64));
+	flits = DIV_ROUND_UP(pkt_len + sizeof(*cpl) + sizeof(*wr),
+			     sizeof(__be64));
 	ndesc = flits_to_desc(flits);
 
 	lb = &pi->ethtool_lb;
-- 
GitLab


From c650e04898072e4b579cbf8d9dd5b86bcdbe9b00 Mon Sep 17 00:00:00 2001
From: Ganji Aravind <ganji.aravind@chelsio.com>
Date: Tue, 18 Aug 2020 21:10:58 +0530
Subject: [PATCH 0265/1341] cxgb4: Fix race between loopback and normal Tx path

Even after Tx queues are marked stopped, there exists a
small window where the current packet in the normal Tx
path is still being sent out and loopback selftest ends
up corrupting the same Tx ring. So, ensure selftest takes
the Tx lock to synchronize access the Tx ring.

Fixes: 7235ffae3d2c ("cxgb4: add loopback ethtool self-test")
Signed-off-by: Ganji Aravind <ganji.aravind@chelsio.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/chelsio/cxgb4/sge.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/sge.c b/drivers/net/ethernet/chelsio/cxgb4/sge.c
index 7c9fe4bc235bb..869431a1eedd4 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/sge.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/sge.c
@@ -2561,11 +2561,14 @@ int cxgb4_selftest_lb_pkt(struct net_device *netdev)
 	lb->loopback = 1;
 
 	q = &adap->sge.ethtxq[pi->first_qset];
+	__netif_tx_lock(q->txq, smp_processor_id());
 
 	reclaim_completed_tx(adap, &q->q, -1, true);
 	credits = txq_avail(&q->q) - ndesc;
-	if (unlikely(credits < 0))
+	if (unlikely(credits < 0)) {
+		__netif_tx_unlock(q->txq);
 		return -ENOMEM;
+	}
 
 	wr = (void *)&q->q.desc[q->q.pidx];
 	memset(wr, 0, sizeof(struct tx_desc));
@@ -2598,6 +2601,7 @@ int cxgb4_selftest_lb_pkt(struct net_device *netdev)
 	init_completion(&lb->completion);
 	txq_advance(&q->q, ndesc);
 	cxgb4_ring_tx_db(adap, &q->q, ndesc);
+	__netif_tx_unlock(q->txq);
 
 	/* wait for the pkt to return */
 	ret = wait_for_completion_timeout(&lb->completion, 10 * HZ);
-- 
GitLab


From 989e4da042ca4a56bbaca9223d1a93639ad11e17 Mon Sep 17 00:00:00 2001
From: Sumera Priyadarsini <sylphrenadin@gmail.com>
Date: Wed, 19 Aug 2020 00:22:41 +0530
Subject: [PATCH 0266/1341] net: gianfar: Add of_node_put() before goto
 statement

Every iteration of for_each_available_child_of_node() decrements
reference count of the previous node, however when control
is transferred from the middle of the loop, as in the case of
a return or break or goto, there is no decrement thus ultimately
resulting in a memory leak.

Fix a potential memory leak in gianfar.c by inserting of_node_put()
before the goto statement.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/freescale/gianfar.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/ethernet/freescale/gianfar.c
index b513b8c5c3b5e..41dd3d0f34524 100644
--- a/drivers/net/ethernet/freescale/gianfar.c
+++ b/drivers/net/ethernet/freescale/gianfar.c
@@ -750,8 +750,10 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
 				continue;
 
 			err = gfar_parse_group(child, priv, model);
-			if (err)
+			if (err) {
+				of_node_put(child);
 				goto err_grp_init;
+			}
 		}
 	} else { /* SQ_SG_MODE */
 		err = gfar_parse_group(np, priv, model);
-- 
GitLab


From 9c9b17a7d19a8e21db2e378784fff1128b46c9d3 Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Wed, 12 Aug 2020 15:57:32 +0800
Subject: [PATCH 0267/1341] drm/amdgpu: disable gfxoff for navy_flounder

gfxoff is temporarily disabled for navy_flounder,
since at present the feature has broken some basic
amdgpu test.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 65997ffaed456..142ffe2da7584 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -3595,6 +3595,9 @@ static void gfx_v10_0_check_gfxoff_flag(struct amdgpu_device *adev)
 		if (!gfx_v10_0_navi10_gfxoff_should_enable(adev))
 			adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
 		break;
+	case CHIP_NAVY_FLOUNDER:
+		adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
+		break;
 	default:
 		break;
 	}
-- 
GitLab


From f5261bec20f4ed1795d7873ffcda649db686f195 Mon Sep 17 00:00:00 2001
From: Kevin Wang <kevin1.wang@amd.com>
Date: Thu, 6 Aug 2020 23:41:47 +0800
Subject: [PATCH 0268/1341] drm/amdgpu: fix uninit-value in
 arcturus_log_thermal_throttling_event()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

when function arcturus_get_smu_metrics_data() call failed,
it will cause the variable "throttler_status" isn't initialized before use.

warning:
powerplay/arcturus_ppt.c:2268:24: warning: ‘throttler_status’ may be used uninitialized in this function [-Wmaybe-uninitialized]
 2268 |   if (throttler_status & logging_label[throttler_idx].feature_mask) {

Signed-off-by: Kevin Wang <kevin1.wang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/powerplay/arcturus_ppt.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
index 6c991de8f3712..fb962b9ceffb8 100644
--- a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
@@ -2204,14 +2204,17 @@ static const struct throttling_logging_label {
 };
 static void arcturus_log_thermal_throttling_event(struct smu_context *smu)
 {
+	int ret;
 	int throttler_idx, throtting_events = 0, buf_idx = 0;
 	struct amdgpu_device *adev = smu->adev;
 	uint32_t throttler_status;
 	char log_buf[256];
 
-	arcturus_get_smu_metrics_data(smu,
-				      METRICS_THROTTLER_STATUS,
-				      &throttler_status);
+	ret = arcturus_get_smu_metrics_data(smu,
+					    METRICS_THROTTLER_STATUS,
+					    &throttler_status);
+	if (ret)
+		return;
 
 	memset(log_buf, 0, sizeof(log_buf));
 	for (throttler_idx = 0; throttler_idx < ARRAY_SIZE(logging_label);
-- 
GitLab


From 1a68d96f81b8e7eb2a121fbf9abf9e5974e58832 Mon Sep 17 00:00:00 2001
From: Guchun Chen <guchun.chen@amd.com>
Date: Thu, 13 Aug 2020 14:35:35 +0800
Subject: [PATCH 0269/1341] drm/amdgpu: fix NULL pointer access issue when
 unloading driver

When unloading driver by "modprobe -r amdgpu", one NULL pointer
dereference bug occurs in ras debugfs releasing. The cause is the
duplicated debugfs_remove, as drm debugfs_root dir has been cleaned
up already by drm_minor_unregister.

BUG: kernel NULL pointer dereference, address: 00000000000000a0
PGD 0 P4D 0
Oops: 0002 [#1] SMP PTI
CPU: 11 PID: 1526 Comm: modprobe Tainted: G           OE     5.6.0-guchchen #1
Hardware name: System manufacturer System Product Name/TUF Z370-PLUS GAMING II, BIOS 0411 09/21/2018
RIP: 0010:down_write+0x15/0x40
Code: eb de e8 7e 17 72 ff cc cc cc cc cc cc cc cc cc cc cc cc cc cc 0f 1f 44 00 00 53 48 89 fb e8 92
d8 ff ff 31 c0 ba 01 00 00 00 <f0> 48 0f b1 13 75 0f 65 48 8b 04 25 c0 8b 01 00 48 89 43 08 5b c3
RSP: 0018:ffffb1590386fcd0 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 00000000000000a0 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff85b2fcc2 RDI: 00000000000000a0
RBP: ffffb1590386fd30 R08: ffffffff85b2fcc2 R09: 000000000002b3c0
R10: ffff97a330618c40 R11: 00000000000005f6 R12: ffff97a3481beb40
R13: 00000000000000a0 R14: ffff97a3481beb40 R15: 0000000000000000
FS:  00007fb11a717540(0000) GS:ffff97a376cc0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000a0 CR3: 00000004066d6006 CR4: 00000000003606e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 simple_recursive_removal+0x63/0x370
 ? debugfs_remove+0x60/0x60
 debugfs_remove+0x40/0x60
 amdgpu_ras_fini+0x82/0x230 [amdgpu]
 ? __kernfs_remove.part.17+0x101/0x1f0
 ? kernfs_name_hash+0x12/0x80
 amdgpu_device_fini+0x1c0/0x580 [amdgpu]
 amdgpu_driver_unload_kms+0x3e/0x70 [amdgpu]
 amdgpu_pci_remove+0x36/0x60 [amdgpu]
 pci_device_remove+0x3b/0xb0
 device_release_driver_internal+0xe5/0x1c0
 driver_detach+0x46/0x90
 bus_remove_driver+0x58/0xd0
 pci_unregister_driver+0x29/0x90
 amdgpu_exit+0x11/0x25 [amdgpu]
 __x64_sys_delete_module+0x13d/0x210
 do_syscall_64+0x5f/0x250
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
index bcce4c0be4623..1bedb416eebd0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
@@ -1243,7 +1243,6 @@ void amdgpu_ras_debugfs_remove(struct amdgpu_device *adev,
 	if (!obj || !obj->ent)
 		return;
 
-	debugfs_remove(obj->ent);
 	obj->ent = NULL;
 	put_obj(obj);
 }
@@ -1257,7 +1256,6 @@ static void amdgpu_ras_debugfs_remove_all(struct amdgpu_device *adev)
 		amdgpu_ras_debugfs_remove(adev, &obj->head);
 	}
 
-	debugfs_remove_recursive(con->dir);
 	con->dir = NULL;
 }
 /* debugfs end */
-- 
GitLab


From 8452fd0ce657a4313dfa784f11320971b67727fd Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 18 Aug 2020 13:58:33 -0700
Subject: [PATCH 0270/1341] io_uring: cleanup io_import_iovec() of pre-mapped
 request

io_rw_prep_async() goes through a dance of clearing req->io, calling
the iovec import, then re-setting req->io. Provide an internal helper
that does the right thing without needing state tweaked to get there.

This enables further cleanups in io_read, io_write, and
io_resubmit_prep(), but that's left for another time.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 4b102d9ad846f..e325895d681bf 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2819,22 +2819,15 @@ static ssize_t io_iov_buffer_select(struct io_kiocb *req, struct iovec *iov,
 	return __io_iov_buffer_select(req, iov, needs_lock);
 }
 
-static ssize_t io_import_iovec(int rw, struct io_kiocb *req,
-			       struct iovec **iovec, struct iov_iter *iter,
-			       bool needs_lock)
+static ssize_t __io_import_iovec(int rw, struct io_kiocb *req,
+				 struct iovec **iovec, struct iov_iter *iter,
+				 bool needs_lock)
 {
 	void __user *buf = u64_to_user_ptr(req->rw.addr);
 	size_t sqe_len = req->rw.len;
 	ssize_t ret;
 	u8 opcode;
 
-	if (req->io) {
-		struct io_async_rw *iorw = &req->io->rw;
-
-		*iovec = NULL;
-		return iov_iter_count(&iorw->iter);
-	}
-
 	opcode = req->opcode;
 	if (opcode == IORING_OP_READ_FIXED || opcode == IORING_OP_WRITE_FIXED) {
 		*iovec = NULL;
@@ -2879,6 +2872,16 @@ static ssize_t io_import_iovec(int rw, struct io_kiocb *req,
 	return import_iovec(rw, buf, sqe_len, UIO_FASTIOV, iovec, iter);
 }
 
+static ssize_t io_import_iovec(int rw, struct io_kiocb *req,
+			       struct iovec **iovec, struct iov_iter *iter,
+			       bool needs_lock)
+{
+	if (!req->io)
+		return __io_import_iovec(rw, req, iovec, iter, needs_lock);
+	*iovec = NULL;
+	return iov_iter_count(&req->io->rw.iter);
+}
+
 /*
  * For files that don't have ->read_iter() and ->write_iter(), handle them
  * by looping over ->read() or ->write() manually.
@@ -3001,11 +3004,8 @@ static inline int io_rw_prep_async(struct io_kiocb *req, int rw,
 	ssize_t ret;
 
 	iorw->iter.iov = iorw->fast_iov;
-	/* reset ->io around the iovec import, we don't want to use it */
-	req->io = NULL;
-	ret = io_import_iovec(rw, req, (struct iovec **) &iorw->iter.iov,
+	ret = __io_import_iovec(rw, req, (struct iovec **) &iorw->iter.iov,
 				&iorw->iter, !force_nonblock);
-	req->io = container_of(iorw, struct io_async_ctx, rw);
 	if (unlikely(ret < 0))
 		return ret;
 
-- 
GitLab


From 0a668aee0ac288cf36a554eb7f270be2ca8ef476 Mon Sep 17 00:00:00 2001
From: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Date: Tue, 28 Jul 2020 11:35:54 -0400
Subject: [PATCH 0271/1341] drm/amdgpu: parse ta firmware for navy_flounder

Use the same case as sienna_cichlid

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/psp_v11_0.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c b/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
index d488d250805d3..e16874f30d5dc 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
@@ -179,12 +179,11 @@ static int psp_v11_0_init_microcode(struct psp_context *psp)
 		}
 		break;
 	case CHIP_SIENNA_CICHLID:
+	case CHIP_NAVY_FLOUNDER:
 		err = psp_init_ta_microcode(&adev->psp, chip_name);
 		if (err)
 			return err;
 		break;
-	case CHIP_NAVY_FLOUNDER:
-		break;
 	default:
 		BUG();
 	}
-- 
GitLab


From 34174b89bfa495bed9cddcc504fb38feca90fab7 Mon Sep 17 00:00:00 2001
From: Huang Rui <ray.huang@amd.com>
Date: Tue, 11 Aug 2020 13:54:56 +0800
Subject: [PATCH 0272/1341] drm/amdkfd: fix the wrong sdma instance query for
 renoir

Renoir only has one sdma instance, it will get failed once query the
sdma1 registers. So use switch-case instead of static register array.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c | 31 +++++++++++++------
 1 file changed, 22 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
index c7fd0c47b2545..1102de76d8767 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v9.c
@@ -195,19 +195,32 @@ static uint32_t get_sdma_rlc_reg_offset(struct amdgpu_device *adev,
 				unsigned int engine_id,
 				unsigned int queue_id)
 {
-	uint32_t sdma_engine_reg_base[2] = {
-		SOC15_REG_OFFSET(SDMA0, 0,
-				 mmSDMA0_RLC0_RB_CNTL) - mmSDMA0_RLC0_RB_CNTL,
-		SOC15_REG_OFFSET(SDMA1, 0,
-				 mmSDMA1_RLC0_RB_CNTL) - mmSDMA1_RLC0_RB_CNTL
-	};
-	uint32_t retval = sdma_engine_reg_base[engine_id]
+	uint32_t sdma_engine_reg_base = 0;
+	uint32_t sdma_rlc_reg_offset;
+
+	switch (engine_id) {
+	default:
+		dev_warn(adev->dev,
+			 "Invalid sdma engine id (%d), using engine id 0\n",
+			 engine_id);
+		fallthrough;
+	case 0:
+		sdma_engine_reg_base = SOC15_REG_OFFSET(SDMA0, 0,
+				mmSDMA0_RLC0_RB_CNTL) - mmSDMA0_RLC0_RB_CNTL;
+		break;
+	case 1:
+		sdma_engine_reg_base = SOC15_REG_OFFSET(SDMA1, 0,
+				mmSDMA1_RLC0_RB_CNTL) - mmSDMA0_RLC0_RB_CNTL;
+		break;
+	}
+
+	sdma_rlc_reg_offset = sdma_engine_reg_base
 		+ queue_id * (mmSDMA0_RLC1_RB_CNTL - mmSDMA0_RLC0_RB_CNTL);
 
 	pr_debug("RLC register offset for SDMA%d RLC%d: 0x%x\n", engine_id,
-			queue_id, retval);
+		 queue_id, sdma_rlc_reg_offset);
 
-	return retval;
+	return sdma_rlc_reg_offset;
 }
 
 static inline struct v9_mqd *get_mqd(void *mqd)
-- 
GitLab


From 5dea2142a86d9aafca07f1318851fb729577f03a Mon Sep 17 00:00:00 2001
From: Chris Park <Chris.Park@amd.com>
Date: Wed, 5 Aug 2020 13:46:40 -0400
Subject: [PATCH 0273/1341] drm/amd/display: Call DMUB for eDP power control

[Why]
If DMUB is used, LVTMA VBIOS call can be used to control eDP instead of
tranditional transmitter control.  Interface is agreed with VBIOS for
eDP to use this new path to program LVTMA registers.

[How]
Create DAL interface to send DMUB command for LVTMA as currently
implemented in VBIOS.

Signed-off-by: Chris Park <Chris.Park@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../drm/amd/display/dc/bios/bios_parser2.c    | 16 ++++++++++-
 .../drm/amd/display/dc/bios/command_table2.c  | 28 +++++++++++++++++++
 .../drm/amd/display/dc/bios/command_table2.h  |  3 +-
 .../gpu/drm/amd/display/dc/dc_bios_types.h    |  4 +++
 .../display/dc/dce110/dce110_hw_sequencer.c   | 24 ++++++++++++++++
 .../amd/display/include/bios_parser_types.h   |  7 +++++
 6 files changed, 80 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
index 078b7e3441855..2d5c7daaee231 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
@@ -1108,6 +1108,18 @@ static enum bp_result bios_parser_enable_disp_power_gating(
 		action);
 }
 
+static enum bp_result bios_parser_enable_lvtma_control(
+	struct dc_bios *dcb,
+	uint8_t uc_pwr_on)
+{
+	struct bios_parser *bp = BP_FROM_DCB(dcb);
+
+	if (!bp->cmd_tbl.enable_lvtma_control)
+		return BP_RESULT_FAILURE;
+
+	return bp->cmd_tbl.enable_lvtma_control(bp, uc_pwr_on);
+}
+
 static bool bios_parser_is_accelerated_mode(
 	struct dc_bios *dcb)
 {
@@ -2208,7 +2220,9 @@ static const struct dc_vbios_funcs vbios_funcs = {
 	.get_board_layout_info = bios_get_board_layout_info,
 	.pack_data_tables = bios_parser_pack_data_tables,
 
-	.get_atom_dc_golden_table = bios_get_atom_dc_golden_table
+	.get_atom_dc_golden_table = bios_get_atom_dc_golden_table,
+
+	.enable_lvtma_control = bios_parser_enable_lvtma_control
 };
 
 static bool bios_parser2_construct(
diff --git a/drivers/gpu/drm/amd/display/dc/bios/command_table2.c b/drivers/gpu/drm/amd/display/dc/bios/command_table2.c
index bed91572f82a6..eb3ae5c3677cb 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/command_table2.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/command_table2.c
@@ -904,6 +904,33 @@ static unsigned int get_smu_clock_info_v3_1(struct bios_parser *bp, uint8_t id)
 	return 0;
 }
 
+/******************************************************************************
+ ******************************************************************************
+ **
+ **                  LVTMA CONTROL
+ **
+ ******************************************************************************
+ *****************************************************************************/
+
+static enum bp_result enable_lvtma_control(
+	struct bios_parser *bp,
+	uint8_t uc_pwr_on);
+
+static void init_enable_lvtma_control(struct bios_parser *bp)
+{
+	/* TODO add switch for table vrsion */
+	bp->cmd_tbl.enable_lvtma_control = enable_lvtma_control;
+
+}
+
+static enum bp_result enable_lvtma_control(
+	struct bios_parser *bp,
+	uint8_t uc_pwr_on)
+{
+	enum bp_result result = BP_RESULT_FAILURE;
+	return result;
+}
+
 void dal_firmware_parser_init_cmd_tbl(struct bios_parser *bp)
 {
 	init_dig_encoder_control(bp);
@@ -919,4 +946,5 @@ void dal_firmware_parser_init_cmd_tbl(struct bios_parser *bp)
 	init_set_dce_clock(bp);
 	init_get_smu_clock_info(bp);
 
+	init_enable_lvtma_control(bp);
 }
diff --git a/drivers/gpu/drm/amd/display/dc/bios/command_table2.h b/drivers/gpu/drm/amd/display/dc/bios/command_table2.h
index 7a2af24dfe605..7bdce013cde5a 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/command_table2.h
+++ b/drivers/gpu/drm/amd/display/dc/bios/command_table2.h
@@ -94,7 +94,8 @@ struct cmd_tbl {
 		struct bp_set_dce_clock_parameters *bp_params);
 	unsigned int (*get_smu_clock_info)(
 			struct bios_parser *bp, uint8_t id);
-
+	enum bp_result (*enable_lvtma_control)(struct bios_parser *bp,
+			uint8_t uc_pwr_on);
 };
 
 void dal_firmware_parser_init_cmd_tbl(struct bios_parser *bp);
diff --git a/drivers/gpu/drm/amd/display/dc/dc_bios_types.h b/drivers/gpu/drm/amd/display/dc/dc_bios_types.h
index d06d07042a120..0811f941f4304 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_bios_types.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_bios_types.h
@@ -136,6 +136,10 @@ struct dc_vbios_funcs {
 
 	enum bp_result (*get_atom_dc_golden_table)(
 			struct dc_bios *dcb);
+
+	enum bp_result (*enable_lvtma_control)(
+		struct dc_bios *bios,
+		uint8_t uc_pwr_on);
 };
 
 struct bios_registers {
diff --git a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
index 49380ed3aeae1..45c9e90278862 100644
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -842,6 +842,17 @@ void dce110_edp_power_control(
 		cntl.coherent = false;
 		cntl.lanes_number = LANE_COUNT_FOUR;
 		cntl.hpd_sel = link->link_enc->hpd_source;
+
+		if (ctx->dc->ctx->dmub_srv &&
+				ctx->dc->debug.dmub_command_table) {
+			if (cntl.action == TRANSMITTER_CONTROL_POWER_ON)
+				bp_result = ctx->dc_bios->funcs->enable_lvtma_control(ctx->dc_bios,
+						LVTMA_CONTROL_POWER_ON);
+			else
+				bp_result = ctx->dc_bios->funcs->enable_lvtma_control(ctx->dc_bios,
+						LVTMA_CONTROL_POWER_OFF);
+		}
+
 		bp_result = link_transmitter_control(ctx->dc_bios, &cntl);
 
 		if (!power_up)
@@ -919,8 +930,21 @@ void dce110_edp_backlight_control(
 		/*edp 1.2*/
 	if (cntl.action == TRANSMITTER_CONTROL_BACKLIGHT_ON)
 		edp_receiver_ready_T7(link);
+
+	if (ctx->dc->ctx->dmub_srv &&
+			ctx->dc->debug.dmub_command_table) {
+		if (cntl.action == TRANSMITTER_CONTROL_BACKLIGHT_ON)
+			ctx->dc_bios->funcs->enable_lvtma_control(ctx->dc_bios,
+					LVTMA_CONTROL_LCD_BLON);
+		else
+			ctx->dc_bios->funcs->enable_lvtma_control(ctx->dc_bios,
+					LVTMA_CONTROL_LCD_BLOFF);
+	}
+
 	link_transmitter_control(ctx->dc_bios, &cntl);
 
+
+
 	if (enable && link->dpcd_sink_ext_caps.bits.oled)
 		msleep(OLED_POST_T7_DELAY);
 
diff --git a/drivers/gpu/drm/amd/display/include/bios_parser_types.h b/drivers/gpu/drm/amd/display/include/bios_parser_types.h
index c30437ae83953..21011edea337b 100644
--- a/drivers/gpu/drm/amd/display/include/bios_parser_types.h
+++ b/drivers/gpu/drm/amd/display/include/bios_parser_types.h
@@ -101,6 +101,13 @@ enum bp_pipe_control_action {
 	ASIC_PIPE_INIT
 };
 
+enum bp_lvtma_control_action {
+	LVTMA_CONTROL_LCD_BLOFF = 2,
+	LVTMA_CONTROL_LCD_BLON = 3,
+	LVTMA_CONTROL_POWER_ON = 12,
+	LVTMA_CONTROL_POWER_OFF = 13
+};
+
 struct bp_encoder_control {
 	enum bp_encoder_control_action action;
 	enum engine_id engine_id;
-- 
GitLab


From 42f8c416521aced2daba61e42d631cc3be2c452b Mon Sep 17 00:00:00 2001
From: Chris Park <Chris.Park@amd.com>
Date: Wed, 5 Aug 2020 16:59:28 -0400
Subject: [PATCH 0274/1341] drm/amd/display: Assign correct left shift

[Why]
Reading for DP alt registers return incorrect values due to LE_SF
definition missing.

[How]
Define correct LE_SF or DP alt registers.

Signed-off-by: Chris Park <Chris.Park@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.h    | 4 +++-
 .../gpu/drm/amd/display/dc/dcn30/dcn30_dio_link_encoder.h    | 5 ++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.h b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.h
index bf0044f7417ec..dcbf28dd72d4a 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_link_encoder.h
@@ -167,7 +167,9 @@
 	LE_SF(DCIO_SOFT_RESET, UNIPHYB_SOFT_RESET, mask_sh),\
 	LE_SF(DCIO_SOFT_RESET, UNIPHYC_SOFT_RESET, mask_sh),\
 	LE_SF(DCIO_SOFT_RESET, UNIPHYD_SOFT_RESET, mask_sh),\
-	LE_SF(DCIO_SOFT_RESET, UNIPHYE_SOFT_RESET, mask_sh)
+	LE_SF(DCIO_SOFT_RESET, UNIPHYE_SOFT_RESET, mask_sh),\
+	LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, mask_sh),\
+	LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, mask_sh)
 
 #define LINK_ENCODER_MASK_SH_LIST_DCN20(mask_sh)\
 	LINK_ENCODER_MASK_SH_LIST_DCN10(mask_sh),\
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_link_encoder.h b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_link_encoder.h
index 8e9fd59ccde82..2fbf879cd327e 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_link_encoder.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dio_link_encoder.h
@@ -61,7 +61,10 @@
 	DPCS_DCN2_MASK_SH_LIST(mask_sh),\
 	LE_SF(DPCSTX0_DPCSTX_TX_CNTL, DPCS_TX_DATA_ORDER_INVERT_18_BIT, mask_sh),\
 	LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL0, RDPCS_PHY_TX_VBOOST_LVL, mask_sh),\
-	LE_SF(RDPCSTX0_RDPCSTX_CLOCK_CNTL, RDPCS_TX_CLK_EN, mask_sh)
+	LE_SF(RDPCSTX0_RDPCSTX_CLOCK_CNTL, RDPCS_TX_CLK_EN, mask_sh),\
+	LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DP4, mask_sh),\
+	LE_SF(RDPCSTX0_RDPCSTX_PHY_CNTL6, RDPCS_PHY_DPALT_DISABLE, mask_sh)
+
 
 void dcn30_link_encoder_construct(
 	struct dcn20_link_encoder *enc20,
-- 
GitLab


From 8e80d482608a4e6a97c75272ef8b4bcfc5d0c490 Mon Sep 17 00:00:00 2001
From: Paul Hsieh <paul.hsieh@amd.com>
Date: Wed, 5 Aug 2020 17:28:37 +0800
Subject: [PATCH 0275/1341] drm/amd/display: Fix DFPstate hang due to view port
 changed

[Why]
Place the cursor in the center of screen between two pipes then
adjusting the viewport but cursour doesn't update cause DFPstate hang.

[How]
If viewport changed, update cursor as well.

Cc: stable@vger.kernel.org
Signed-off-by: Paul Hsieh <paul.hsieh@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index 66180b4332f1d..c8cfd3ba1c156 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1457,8 +1457,8 @@ static void dcn20_update_dchubp_dpp(
 
 	/* Any updates are handled in dc interface, just need to apply existing for plane enable */
 	if ((pipe_ctx->update_flags.bits.enable || pipe_ctx->update_flags.bits.opp_changed ||
-			pipe_ctx->update_flags.bits.scaler || pipe_ctx->update_flags.bits.viewport)
-			&& pipe_ctx->stream->cursor_attributes.address.quad_part != 0) {
+			pipe_ctx->update_flags.bits.scaler || viewport_changed == true) &&
+			pipe_ctx->stream->cursor_attributes.address.quad_part != 0) {
 		dc->hwss.set_cursor_position(pipe_ctx);
 		dc->hwss.set_cursor_attribute(pipe_ctx);
 
-- 
GitLab


From 5ec37c089e7d02265b4e2ed9529bc7497fc1cf5a Mon Sep 17 00:00:00 2001
From: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Date: Thu, 6 Aug 2020 13:57:08 -0400
Subject: [PATCH 0276/1341] drm/amd/display: fix dcn3 wide timing dsc
 validation

Wide timing DSC requires odm. Since spreadsheet is missing this dsc
validation we have to modify DML vba code ourselves.

Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Reviewed-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c    | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c b/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c
index b54814f11b74b..2beb284f89b0a 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn30/display_mode_vba_30.c
@@ -63,6 +63,7 @@ typedef struct {
 
 #define BPP_INVALID 0
 #define BPP_BLENDED_PIPE 0xffffffff
+#define DCN30_MAX_DSC_IMAGE_WIDTH 5184
 
 static void DisplayPipeConfiguration(struct display_mode_lib *mode_lib);
 static void DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerformanceCalculation(
@@ -3984,6 +3985,9 @@ void dml30_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l
 				} else if (v->PlaneRequiredDISPCLKWithoutODMCombine > v->MaxDispclkRoundedDownToDFSGranularity) {
 					v->ODMCombineEnablePerState[i][k] = dm_odm_combine_mode_2to1;
 					v->PlaneRequiredDISPCLK = v->PlaneRequiredDISPCLKWithODMCombine2To1;
+				} else if (v->DSCEnabled[k] && (v->HActive[k] > DCN30_MAX_DSC_IMAGE_WIDTH)) {
+					v->ODMCombineEnablePerState[i][k] = dm_odm_combine_mode_2to1;
+					v->PlaneRequiredDISPCLK = v->PlaneRequiredDISPCLKWithODMCombine2To1;
 				} else {
 					v->ODMCombineEnablePerState[i][k] = dm_odm_combine_mode_disabled;
 					v->PlaneRequiredDISPCLK = v->PlaneRequiredDISPCLKWithoutODMCombine;
-- 
GitLab


From db0473f62438e075b6832fd1490fd06d03c59372 Mon Sep 17 00:00:00 2001
From: Chris Park <Chris.Park@amd.com>
Date: Thu, 6 Aug 2020 15:40:01 -0400
Subject: [PATCH 0277/1341] drm/amd/display: Reset scrambling on Test Pattern

[Why]
Programming is missing the sequence where for eDP the scrambling is
reset when testing for eye diagram test pattern.

[How]
Include the required register in the definition

Signed-off-by: Chris Park <Chris.Park@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
index 653a571e366d1..ebe0cc5b833bb 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_resource.c
@@ -491,6 +491,7 @@ static const struct dcn10_link_enc_hpd_registers link_enc_hpd_regs[] = {
 [id] = {\
 	LE_DCN3_REG_LIST(id), \
 	UNIPHY_DCN2_REG_LIST(phyid), \
+	SRI(DP_DPHY_INTERNAL_CTRL, DP, id) \
 }
 
 static const struct dce110_aux_registers_shift aux_shift = {
-- 
GitLab


From d2e59d0ff4c44d1f6f8ed884a5bea7d1bb7fd98c Mon Sep 17 00:00:00 2001
From: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Date: Thu, 6 Aug 2020 17:54:47 -0400
Subject: [PATCH 0278/1341] drm/amd/display: fix pow() crashing when given base
 0

[Why&How]
pow(a,x) is implemented as exp(x*log(a)). log(0) will crash.
So return 0^x = 0, unless x=0, convention seems to be 0^0 = 1.

Cc: stable@vger.kernel.org
Signed-off-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/include/fixed31_32.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/include/fixed31_32.h b/drivers/gpu/drm/amd/display/include/fixed31_32.h
index 89ef9f6860e5b..16df2a485dd0d 100644
--- a/drivers/gpu/drm/amd/display/include/fixed31_32.h
+++ b/drivers/gpu/drm/amd/display/include/fixed31_32.h
@@ -431,6 +431,9 @@ struct fixed31_32 dc_fixpt_log(struct fixed31_32 arg);
  */
 static inline struct fixed31_32 dc_fixpt_pow(struct fixed31_32 arg1, struct fixed31_32 arg2)
 {
+	if (arg1.value == 0)
+		return arg2.value == 0 ? dc_fixpt_one : dc_fixpt_zero;
+
 	return dc_fixpt_exp(
 		dc_fixpt_mul(
 			dc_fixpt_log(arg1),
-- 
GitLab


From eabe861881a733fc84f286f4d5a1ffaddd4f526f Mon Sep 17 00:00:00 2001
From: Miaohe Lin <linmiaohe@huawei.com>
Date: Sat, 15 Aug 2020 04:46:41 -0400
Subject: [PATCH 0279/1341] net: handle the return value of
 pskb_carve_frag_list() correctly

pskb_carve_frag_list() may return -ENOMEM in pskb_carve_inside_nonlinear().
we should handle this correctly or we would get wrong sk_buff.

Fixes: 6fa01ccd8830 ("skbuff: Add pskb_extract() helper function")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/core/skbuff.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 5c3b906aeef3d..e18184ffa9c3f 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -5987,9 +5987,13 @@ static int pskb_carve_inside_nonlinear(struct sk_buff *skb, const u32 off,
 	if (skb_has_frag_list(skb))
 		skb_clone_fraglist(skb);
 
-	if (k == 0) {
-		/* split line is in frag list */
-		pskb_carve_frag_list(skb, shinfo, off - pos, gfp_mask);
+	/* split line is in frag list */
+	if (k == 0 && pskb_carve_frag_list(skb, shinfo, off - pos, gfp_mask)) {
+		/* skb_frag_unref() is not needed here as shinfo->nr_frags = 0. */
+		if (skb_has_frag_list(skb))
+			kfree_skb_list(skb_shinfo(skb)->frag_list);
+		kfree(data);
+		return -ENOMEM;
 	}
 	skb_release_data(skb);
 
-- 
GitLab


From 0410d07190961ac526f05085765a8d04d926545b Mon Sep 17 00:00:00 2001
From: Jiri Wiesner <jwiesner@suse.com>
Date: Sun, 16 Aug 2020 20:52:44 +0200
Subject: [PATCH 0280/1341] bonding: fix active-backup failover for current ARP
 slave

When the ARP monitor is used for link detection, ARP replies are
validated for all slaves (arp_validate=3) and fail_over_mac is set to
active, two slaves of an active-backup bond may get stuck in a state
where both of them are active and pass packets that they receive to
the bond. This state makes IPv6 duplicate address detection fail. The
state is reached thus:
1. The current active slave goes down because the ARP target
   is not reachable.
2. The current ARP slave is chosen and made active.
3. A new slave is enslaved. This new slave becomes the current active
   slave and can reach the ARP target.
As a result, the current ARP slave stays active after the enslave
action has finished and the log is littered with "PROBE BAD" messages:
> bond0: PROBE: c_arp ens10 && cas ens11 BAD
The workaround is to remove the slave with "going back" status from
the bond and re-enslave it. This issue was encountered when DPDK PMD
interfaces were being enslaved to an active-backup bond.

I would be possible to fix the issue in bond_enslave() or
bond_change_active_slave() but the ARP monitor was fixed instead to
keep most of the actions changing the current ARP slave in the ARP
monitor code. The current ARP slave is set as inactive and backup
during the commit phase. A new state, BOND_LINK_FAIL, has been
introduced for slaves in the context of the ARP monitor. This allows
administrators to see how slaves are rotated for sending ARP requests
and attempts are made to find a new active slave.

Fixes: b2220cad583c9 ("bonding: refactor ARP active-backup monitor")
Signed-off-by: Jiri Wiesner <jwiesner@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/bonding/bond_main.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 415a37e44caeb..c5d3032dd1a21 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2948,6 +2948,9 @@ static int bond_ab_arp_inspect(struct bonding *bond)
 			if (bond_time_in_interval(bond, last_rx, 1)) {
 				bond_propose_link_state(slave, BOND_LINK_UP);
 				commit++;
+			} else if (slave->link == BOND_LINK_BACK) {
+				bond_propose_link_state(slave, BOND_LINK_FAIL);
+				commit++;
 			}
 			continue;
 		}
@@ -3056,6 +3059,19 @@ static void bond_ab_arp_commit(struct bonding *bond)
 
 			continue;
 
+		case BOND_LINK_FAIL:
+			bond_set_slave_link_state(slave, BOND_LINK_FAIL,
+						  BOND_SLAVE_NOTIFY_NOW);
+			bond_set_slave_inactive_flags(slave,
+						      BOND_SLAVE_NOTIFY_NOW);
+
+			/* A slave has just been enslaved and has become
+			 * the current active slave.
+			 */
+			if (rtnl_dereference(bond->curr_active_slave))
+				RCU_INIT_POINTER(bond->current_arp_slave, NULL);
+			continue;
+
 		default:
 			slave_err(bond->dev, slave->dev,
 				  "impossible: link_new_state %d on slave\n",
@@ -3106,8 +3122,6 @@ static bool bond_ab_arp_probe(struct bonding *bond)
 			return should_notify_rtnl;
 	}
 
-	bond_set_slave_inactive_flags(curr_arp_slave, BOND_SLAVE_NOTIFY_LATER);
-
 	bond_for_each_slave_rcu(bond, slave, iter) {
 		if (!found && !before && bond_slave_is_up(slave))
 			before = slave;
-- 
GitLab


From 4ef1a7cb08e94da1f2f2a34ee6cefe7ae142dc98 Mon Sep 17 00:00:00 2001
From: Xin Long <lucien.xin@gmail.com>
Date: Mon, 17 Aug 2020 14:30:49 +0800
Subject: [PATCH 0281/1341] ipv6: some fixes for ipv6_dev_find()

This patch is to do 3 things for ipv6_dev_find():

  As David A. noticed,

  - rt6_lookup() is not really needed. Different from __ip_dev_find(),
    ipv6_dev_find() doesn't have a compatibility problem, so remove it.

  As Hideaki suggested,

  - "valid" (non-tentative) check for the address is also needed.
    ipv6_chk_addr() calls ipv6_chk_addr_and_flags(), which will
    traverse the address hash list, but it's heavy to be called
    inside ipv6_dev_find(). This patch is to reuse the code of
    ipv6_chk_addr_and_flags() for ipv6_dev_find().

  - dev parameter is passed into ipv6_dev_find(), as link-local
    addresses from user space has sin6_scope_id set and the dev
    lookup needs it.

Fixes: 81f6cb31222d ("ipv6: add ipv6_dev_find()")
Suggested-by: YOSHIFUJI Hideaki <hideaki.yoshifuji@miraclelinux.com>
Reported-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/addrconf.h |  3 ++-
 net/ipv6/addrconf.c    | 60 ++++++++++++++++--------------------------
 net/tipc/udp_media.c   |  8 +++---
 3 files changed, 28 insertions(+), 43 deletions(-)

diff --git a/include/net/addrconf.h b/include/net/addrconf.h
index ba3f6c15ad2b5..18f783dcd55fa 100644
--- a/include/net/addrconf.h
+++ b/include/net/addrconf.h
@@ -97,7 +97,8 @@ bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
 
 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev);
 
-struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr);
+struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr,
+				 struct net_device *dev);
 
 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net,
 				     const struct in6_addr *addr,
diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 8e761b8c47c69..01146b66d6669 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -1893,12 +1893,13 @@ EXPORT_SYMBOL(ipv6_chk_addr);
  *   2. does the address exist on the specific device
  *      (skip_dev_check = false)
  */
-int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
-			    const struct net_device *dev, bool skip_dev_check,
-			    int strict, u32 banned_flags)
+static struct net_device *
+__ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
+			  const struct net_device *dev, bool skip_dev_check,
+			  int strict, u32 banned_flags)
 {
 	unsigned int hash = inet6_addr_hash(net, addr);
-	const struct net_device *l3mdev;
+	struct net_device *l3mdev, *ndev;
 	struct inet6_ifaddr *ifp;
 	u32 ifp_flags;
 
@@ -1909,10 +1910,11 @@ int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
 		dev = NULL;
 
 	hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
-		if (!net_eq(dev_net(ifp->idev->dev), net))
+		ndev = ifp->idev->dev;
+		if (!net_eq(dev_net(ndev), net))
 			continue;
 
-		if (l3mdev_master_dev_rcu(ifp->idev->dev) != l3mdev)
+		if (l3mdev_master_dev_rcu(ndev) != l3mdev)
 			continue;
 
 		/* Decouple optimistic from tentative for evaluation here.
@@ -1923,15 +1925,23 @@ int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
 			    : ifp->flags;
 		if (ipv6_addr_equal(&ifp->addr, addr) &&
 		    !(ifp_flags&banned_flags) &&
-		    (!dev || ifp->idev->dev == dev ||
+		    (!dev || ndev == dev ||
 		     !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
 			rcu_read_unlock();
-			return 1;
+			return ndev;
 		}
 	}
 
 	rcu_read_unlock();
-	return 0;
+	return NULL;
+}
+
+int ipv6_chk_addr_and_flags(struct net *net, const struct in6_addr *addr,
+			    const struct net_device *dev, bool skip_dev_check,
+			    int strict, u32 banned_flags)
+{
+	return __ipv6_chk_addr_and_flags(net, addr, dev, skip_dev_check,
+					 strict, banned_flags) ? 1 : 0;
 }
 EXPORT_SYMBOL(ipv6_chk_addr_and_flags);
 
@@ -1990,35 +2000,11 @@ EXPORT_SYMBOL(ipv6_chk_prefix);
  *
  * The caller should be protected by RCU, or RTNL.
  */
-struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr)
+struct net_device *ipv6_dev_find(struct net *net, const struct in6_addr *addr,
+				 struct net_device *dev)
 {
-	unsigned int hash = inet6_addr_hash(net, addr);
-	struct inet6_ifaddr *ifp, *result = NULL;
-	struct net_device *dev = NULL;
-
-	rcu_read_lock();
-	hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
-		if (net_eq(dev_net(ifp->idev->dev), net) &&
-		    ipv6_addr_equal(&ifp->addr, addr)) {
-			result = ifp;
-			break;
-		}
-	}
-
-	if (!result) {
-		struct rt6_info *rt;
-
-		rt = rt6_lookup(net, addr, NULL, 0, NULL, 0);
-		if (rt) {
-			dev = rt->dst.dev;
-			ip6_rt_put(rt);
-		}
-	} else {
-		dev = result->idev->dev;
-	}
-	rcu_read_unlock();
-
-	return dev;
+	return __ipv6_chk_addr_and_flags(net, addr, dev, !dev, 1,
+					 IFA_F_TENTATIVE);
 }
 EXPORT_SYMBOL(ipv6_dev_find);
 
diff --git a/net/tipc/udp_media.c b/net/tipc/udp_media.c
index 53f0de0676b7a..911d13cd2e675 100644
--- a/net/tipc/udp_media.c
+++ b/net/tipc/udp_media.c
@@ -660,6 +660,7 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b,
 	struct udp_tunnel_sock_cfg tuncfg = {NULL};
 	struct nlattr *opts[TIPC_NLA_UDP_MAX + 1];
 	u8 node_id[NODE_ID_LEN] = {0,};
+	struct net_device *dev;
 	int rmcast = 0;
 
 	ub = kzalloc(sizeof(*ub), GFP_ATOMIC);
@@ -714,8 +715,6 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b,
 	rcu_assign_pointer(ub->bearer, b);
 	tipc_udp_media_addr_set(&b->addr, &local);
 	if (local.proto == htons(ETH_P_IP)) {
-		struct net_device *dev;
-
 		dev = __ip_dev_find(net, local.ipv4.s_addr, false);
 		if (!dev) {
 			err = -ENODEV;
@@ -738,9 +737,8 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b,
 		b->mtu = b->media->mtu;
 #if IS_ENABLED(CONFIG_IPV6)
 	} else if (local.proto == htons(ETH_P_IPV6)) {
-		struct net_device *dev;
-
-		dev = ipv6_dev_find(net, &local.ipv6);
+		dev = ub->ifindex ? __dev_get_by_index(net, ub->ifindex) : NULL;
+		dev = ipv6_dev_find(net, &local.ipv6, dev);
 		if (!dev) {
 			err = -ENODEV;
 			goto err;
-- 
GitLab


From 840110a4eae190dcbb9907d68216d5d1d9f25839 Mon Sep 17 00:00:00 2001
From: Maxim Mikityanskiy <maximmi@mellanox.com>
Date: Mon, 17 Aug 2020 16:34:05 +0300
Subject: [PATCH 0282/1341] ethtool: Fix preserving of wanted feature bits in
 netlink interface

Currently, ethtool-netlink calculates new wanted bits as:
(req_wanted & req_mask) | (old_active & ~req_mask)

It completely discards the old wanted bits, so they are forgotten with
the next ethtool command. Sample steps to reproduce:

1. ethtool -k eth0
   tx-tcp-segmentation: on # TSO is on from the beginning
2. ethtool -K eth0 tx off
   tx-tcp-segmentation: off [not requested]
3. ethtool -k eth0
   tx-tcp-segmentation: off [requested on]
4. ethtool -K eth0 rx off # Some change unrelated to TSO
5. ethtool -k eth0
   tx-tcp-segmentation: off # "Wanted on" is forgotten

This commit fixes it by changing the formula to:
(req_wanted & req_mask) | (old_wanted & ~req_mask),
where old_active was replaced by old_wanted to account for the wanted
bits.

The shortcut condition for the case where nothing was changed now
compares wanted bitmasks, instead of wanted to active.

Fixes: 0980bfcd6954 ("ethtool: set netdev features with FEATURES_SET request")
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ethtool/features.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index 4e632dc987d85..ec196f0fddc92 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -224,7 +224,9 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
 	DECLARE_BITMAP(wanted_diff_mask, NETDEV_FEATURE_COUNT);
 	DECLARE_BITMAP(active_diff_mask, NETDEV_FEATURE_COUNT);
 	DECLARE_BITMAP(old_active, NETDEV_FEATURE_COUNT);
+	DECLARE_BITMAP(old_wanted, NETDEV_FEATURE_COUNT);
 	DECLARE_BITMAP(new_active, NETDEV_FEATURE_COUNT);
+	DECLARE_BITMAP(new_wanted, NETDEV_FEATURE_COUNT);
 	DECLARE_BITMAP(req_wanted, NETDEV_FEATURE_COUNT);
 	DECLARE_BITMAP(req_mask, NETDEV_FEATURE_COUNT);
 	struct nlattr *tb[ETHTOOL_A_FEATURES_MAX + 1];
@@ -250,6 +252,7 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
 
 	rtnl_lock();
 	ethnl_features_to_bitmap(old_active, dev->features);
+	ethnl_features_to_bitmap(old_wanted, dev->wanted_features);
 	ret = ethnl_parse_bitset(req_wanted, req_mask, NETDEV_FEATURE_COUNT,
 				 tb[ETHTOOL_A_FEATURES_WANTED],
 				 netdev_features_strings, info->extack);
@@ -261,11 +264,11 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
 		goto out_rtnl;
 	}
 
-	/* set req_wanted bits not in req_mask from old_active */
+	/* set req_wanted bits not in req_mask from old_wanted */
 	bitmap_and(req_wanted, req_wanted, req_mask, NETDEV_FEATURE_COUNT);
-	bitmap_andnot(new_active, old_active, req_mask, NETDEV_FEATURE_COUNT);
-	bitmap_or(req_wanted, new_active, req_wanted, NETDEV_FEATURE_COUNT);
-	if (bitmap_equal(req_wanted, old_active, NETDEV_FEATURE_COUNT)) {
+	bitmap_andnot(new_wanted, old_wanted, req_mask, NETDEV_FEATURE_COUNT);
+	bitmap_or(req_wanted, new_wanted, req_wanted, NETDEV_FEATURE_COUNT);
+	if (bitmap_equal(req_wanted, old_wanted, NETDEV_FEATURE_COUNT)) {
 		ret = 0;
 		goto out_rtnl;
 	}
-- 
GitLab


From 2847bfed888fbb8bf4c8e8067fd6127538c2c700 Mon Sep 17 00:00:00 2001
From: Maxim Mikityanskiy <maximmi@mellanox.com>
Date: Mon, 17 Aug 2020 16:34:06 +0300
Subject: [PATCH 0283/1341] ethtool: Account for hw_features in netlink
 interface

ethtool-netlink ignores dev->hw_features and may confuse the drivers by
asking them to enable features not in the hw_features bitmask. For
example:

1. ethtool -k eth0
   tls-hw-tx-offload: off [fixed]
2. ethtool -K eth0 tls-hw-tx-offload on
   tls-hw-tx-offload: on
3. ethtool -k eth0
   tls-hw-tx-offload: on [fixed]

Fitler out dev->hw_features from req_wanted to fix it and to resemble
the legacy ethtool behavior.

Fixes: 0980bfcd6954 ("ethtool: set netdev features with FEATURES_SET request")
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ethtool/features.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index ec196f0fddc92..6b288bfd7678e 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -273,7 +273,8 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
 		goto out_rtnl;
 	}
 
-	dev->wanted_features = ethnl_bitmap_to_features(req_wanted);
+	dev->wanted_features &= ~dev->hw_features;
+	dev->wanted_features |= ethnl_bitmap_to_features(req_wanted) & dev->hw_features;
 	__netdev_update_features(dev);
 	ethnl_features_to_bitmap(new_active, dev->features);
 	mod = !bitmap_equal(old_active, new_active, NETDEV_FEATURE_COUNT);
-- 
GitLab


From f01204ec8be7ea5e8f0230a7d4200e338d563bde Mon Sep 17 00:00:00 2001
From: Maxim Mikityanskiy <maximmi@mellanox.com>
Date: Mon, 17 Aug 2020 16:34:07 +0300
Subject: [PATCH 0284/1341] ethtool: Don't omit the netlink reply if no
 features were changed

The legacy ethtool userspace tool shows an error when no features could
be changed. It's useful to have a netlink reply to be able to show this
error when __netdev_update_features wasn't called, for example:

1. ethtool -k eth0
   large-receive-offload: off
2. ethtool -K eth0 rx-fcs on
3. ethtool -K eth0 lro on
   Could not change any device features
   rx-lro: off [requested on]
4. ethtool -K eth0 lro on
   # The output should be the same, but without this patch the kernel
   # doesn't send the reply, and ethtool is unable to detect the error.

This commit makes ethtool-netlink always return a reply when requested,
and it still avoids unnecessary calls to __netdev_update_features if the
wanted features haven't changed.

Fixes: 0980bfcd6954 ("ethtool: set netdev features with FEATURES_SET request")
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ethtool/features.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index 6b288bfd7678e..495635f152ba6 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -268,14 +268,11 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
 	bitmap_and(req_wanted, req_wanted, req_mask, NETDEV_FEATURE_COUNT);
 	bitmap_andnot(new_wanted, old_wanted, req_mask, NETDEV_FEATURE_COUNT);
 	bitmap_or(req_wanted, new_wanted, req_wanted, NETDEV_FEATURE_COUNT);
-	if (bitmap_equal(req_wanted, old_wanted, NETDEV_FEATURE_COUNT)) {
-		ret = 0;
-		goto out_rtnl;
+	if (!bitmap_equal(req_wanted, old_wanted, NETDEV_FEATURE_COUNT)) {
+		dev->wanted_features &= ~dev->hw_features;
+		dev->wanted_features |= ethnl_bitmap_to_features(req_wanted) & dev->hw_features;
+		__netdev_update_features(dev);
 	}
-
-	dev->wanted_features &= ~dev->hw_features;
-	dev->wanted_features |= ethnl_bitmap_to_features(req_wanted) & dev->hw_features;
-	__netdev_update_features(dev);
 	ethnl_features_to_bitmap(new_active, dev->features);
 	mod = !bitmap_equal(old_active, new_active, NETDEV_FEATURE_COUNT);
 
-- 
GitLab


From 17340552ce449ab55e3ccbfc2af1bcc600b4fbb5 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Mon, 17 Aug 2020 23:40:42 +0100
Subject: [PATCH 0285/1341] net: mscc: ocelot: remove duplicate "the the"
 phrase in Kconfig text

The Kconfig help text contains the phrase "the the" in the help
text. Fix this.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/dsa/ocelot/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/ocelot/Kconfig b/drivers/net/dsa/ocelot/Kconfig
index f121619d81fef..2d23ccef7d0ed 100644
--- a/drivers/net/dsa/ocelot/Kconfig
+++ b/drivers/net/dsa/ocelot/Kconfig
@@ -9,7 +9,7 @@ config NET_DSA_MSCC_FELIX
 	select NET_DSA_TAG_OCELOT
 	select FSL_ENETC_MDIO
 	help
-	  This driver supports network switches from the the Vitesse /
+	  This driver supports network switches from the Vitesse /
 	  Microsemi / Microchip Ocelot family of switching cores that are
 	  connected to their host CPU via Ethernet.
 	  The following switches are supported:
-- 
GitLab


From ad6641189c5935192a15eeb4b369dd04ebedfabb Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Mon, 17 Aug 2020 23:44:25 +0100
Subject: [PATCH 0286/1341] net: ipv4: remove duplicate "the the" phrase in
 Kconfig text

The Kconfig help text contains the phrase "the the" in the help
text. Fix this and reformat the block of help text.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ipv4/Kconfig | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig
index 60db5a6487cc5..87983e70f03f3 100644
--- a/net/ipv4/Kconfig
+++ b/net/ipv4/Kconfig
@@ -661,13 +661,13 @@ config TCP_CONG_BBR
 
 	  BBR (Bottleneck Bandwidth and RTT) TCP congestion control aims to
 	  maximize network utilization and minimize queues. It builds an explicit
-	  model of the the bottleneck delivery rate and path round-trip
-	  propagation delay. It tolerates packet loss and delay unrelated to
-	  congestion. It can operate over LAN, WAN, cellular, wifi, or cable
-	  modem links. It can coexist with flows that use loss-based congestion
-	  control, and can operate with shallow buffers, deep buffers,
-	  bufferbloat, policers, or AQM schemes that do not provide a delay
-	  signal. It requires the fq ("Fair Queue") pacing packet scheduler.
+	  model of the bottleneck delivery rate and path round-trip propagation
+	  delay. It tolerates packet loss and delay unrelated to congestion. It
+	  can operate over LAN, WAN, cellular, wifi, or cable modem links. It can
+	  coexist with flows that use loss-based congestion control, and can
+	  operate with shallow buffers, deep buffers, bufferbloat, policers, or
+	  AQM schemes that do not provide a delay signal. It requires the fq
+	  ("Fair Queue") pacing packet scheduler.
 
 choice
 	prompt "Default TCP congestion control"
-- 
GitLab


From e679654a704e5bd676ea6446fa7b764cbabf168a Mon Sep 17 00:00:00 2001
From: Yonghong Song <yhs@fb.com>
Date: Tue, 18 Aug 2020 15:23:09 -0700
Subject: [PATCH 0287/1341] bpf: Fix a rcu_sched stall issue with bpf
 task/task_file iterator

In our production system, we observed rcu stalls when
'bpftool prog` is running.
  rcu: INFO: rcu_sched self-detected stall on CPU
  rcu: \x097-....: (20999 ticks this GP) idle=302/1/0x4000000000000000 softirq=1508852/1508852 fqs=4913
  \x09(t=21031 jiffies g=2534773 q=179750)
  NMI backtrace for cpu 7
  CPU: 7 PID: 184195 Comm: bpftool Kdump: loaded Tainted: G        W         5.8.0-00004-g68bfc7f8c1b4 #6
  Hardware name: Quanta Twin Lakes MP/Twin Lakes Passive MP, BIOS F09_3A17 05/03/2019
  Call Trace:
  <IRQ>
  dump_stack+0x57/0x70
  nmi_cpu_backtrace.cold+0x14/0x53
  ? lapic_can_unplug_cpu.cold+0x39/0x39
  nmi_trigger_cpumask_backtrace+0xb7/0xc7
  rcu_dump_cpu_stacks+0xa2/0xd0
  rcu_sched_clock_irq.cold+0x1ff/0x3d9
  ? tick_nohz_handler+0x100/0x100
  update_process_times+0x5b/0x90
  tick_sched_timer+0x5e/0xf0
  __hrtimer_run_queues+0x12a/0x2a0
  hrtimer_interrupt+0x10e/0x280
  __sysvec_apic_timer_interrupt+0x51/0xe0
  asm_call_on_stack+0xf/0x20
  </IRQ>
  sysvec_apic_timer_interrupt+0x6f/0x80
  asm_sysvec_apic_timer_interrupt+0x12/0x20
  RIP: 0010:task_file_seq_get_next+0x71/0x220
  Code: 00 00 8b 53 1c 49 8b 7d 00 89 d6 48 8b 47 20 44 8b 18 41 39 d3 76 75 48 8b 4f 20 8b 01 39 d0 76 61 41 89 d1 49 39 c1 48 19 c0 <48> 8b 49 08 21 d0 48 8d 04 c1 4c 8b 08 4d 85 c9 74 46 49 8b 41 38
  RSP: 0018:ffffc90006223e10 EFLAGS: 00000297
  RAX: ffffffffffffffff RBX: ffff888f0d172388 RCX: ffff888c8c07c1c0
  RDX: 00000000000f017b RSI: 00000000000f017b RDI: ffff888c254702c0
  RBP: ffffc90006223e68 R08: ffff888be2a1c140 R09: 00000000000f017b
  R10: 0000000000000002 R11: 0000000000100000 R12: ffff888f23c24118
  R13: ffffc90006223e60 R14: ffffffff828509a0 R15: 00000000ffffffff
  task_file_seq_next+0x52/0xa0
  bpf_seq_read+0xb9/0x320
  vfs_read+0x9d/0x180
  ksys_read+0x5f/0xe0
  do_syscall_64+0x38/0x60
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  RIP: 0033:0x7f8815f4f76e
  Code: c0 e9 f6 fe ff ff 55 48 8d 3d 76 70 0a 00 48 89 e5 e8 36 06 02 00 66 0f 1f 44 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 52 c3 66 0f 1f 84 00 00 00 00 00 55 48 89 e5
  RSP: 002b:00007fff8f9df578 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
  RAX: ffffffffffffffda RBX: 000000000170b9c0 RCX: 00007f8815f4f76e
  RDX: 0000000000001000 RSI: 00007fff8f9df5b0 RDI: 0000000000000007
  RBP: 00007fff8f9e05f0 R08: 0000000000000049 R09: 0000000000000010
  R10: 00007f881601fa40 R11: 0000000000000246 R12: 00007fff8f9e05a8
  R13: 00007fff8f9e05a8 R14: 0000000001917f90 R15: 000000000000e22e

Note that `bpftool prog` actually calls a task_file bpf iterator
program to establish an association between prog/map/link/btf anon
files and processes.

In the case where the above rcu stall occured, we had a process
having 1587 tasks and each task having roughly 81305 files.
This implied 129 million bpf prog invocations. Unfortunwtely none of
these files are prog/map/link/btf files so bpf iterator/prog needs
to traverse all these files and not able to return to user space
since there are no seq_file buffer overflow.

This patch fixed the issue in bpf_seq_read() to limit the number
of visited objects. If the maximum number of visited objects is
reached, no more objects will be visited in the current syscall.
If there is nothing written in the seq_file buffer, -EAGAIN will
return to the user so user can try again.

The maximum number of visited objects is set at 1 million.
In our Intel Xeon D-2191 2.3GHZ 18-core server, bpf_seq_read()
visiting 1 million files takes around 0.18 seconds.

We did not use cond_resched() since for some iterators, e.g.,
netlink iterator, where rcu read_lock critical section spans between
consecutive seq_ops->next(), which makes impossible to do cond_resched()
in the key while loop of function bpf_seq_read().

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/bpf/20200818222309.2181348-1-yhs@fb.com
---
 kernel/bpf/bpf_iter.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/kernel/bpf/bpf_iter.c b/kernel/bpf/bpf_iter.c
index b6715964b6856..8faa2ce893968 100644
--- a/kernel/bpf/bpf_iter.c
+++ b/kernel/bpf/bpf_iter.c
@@ -67,6 +67,9 @@ static void bpf_iter_done_stop(struct seq_file *seq)
 	iter_priv->done_stop = true;
 }
 
+/* maximum visited objects before bailing out */
+#define MAX_ITER_OBJECTS	1000000
+
 /* bpf_seq_read, a customized and simpler version for bpf iterator.
  * no_llseek is assumed for this file.
  * The following are differences from seq_read():
@@ -79,7 +82,7 @@ static ssize_t bpf_seq_read(struct file *file, char __user *buf, size_t size,
 {
 	struct seq_file *seq = file->private_data;
 	size_t n, offs, copied = 0;
-	int err = 0;
+	int err = 0, num_objs = 0;
 	void *p;
 
 	mutex_lock(&seq->lock);
@@ -135,6 +138,7 @@ static ssize_t bpf_seq_read(struct file *file, char __user *buf, size_t size,
 	while (1) {
 		loff_t pos = seq->index;
 
+		num_objs++;
 		offs = seq->count;
 		p = seq->op->next(seq, p, &seq->index);
 		if (pos == seq->index) {
@@ -153,6 +157,15 @@ static ssize_t bpf_seq_read(struct file *file, char __user *buf, size_t size,
 		if (seq->count >= size)
 			break;
 
+		if (num_objs >= MAX_ITER_OBJECTS) {
+			if (offs == 0) {
+				err = -EAGAIN;
+				seq->op->stop(seq, p);
+				goto done;
+			}
+			break;
+		}
+
 		err = seq->op->show(seq, p);
 		if (err > 0) {
 			bpf_iter_dec_seq_num(seq);
-- 
GitLab


From e60572b8d4c39572be6857d1ec91fdf979f8775f Mon Sep 17 00:00:00 2001
From: Yonghong Song <yhs@fb.com>
Date: Tue, 18 Aug 2020 15:23:10 -0700
Subject: [PATCH 0288/1341] bpf: Avoid visit same object multiple times

Currently when traversing all tasks, the next tid
is always increased by one. This may result in
visiting the same task multiple times in a
pid namespace.

This patch fixed the issue by seting the next
tid as pid_nr_ns(pid, ns) + 1, similar to
funciton next_tgid().

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Link: https://lore.kernel.org/bpf/20200818222310.2181500-1-yhs@fb.com
---
 kernel/bpf/task_iter.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/bpf/task_iter.c b/kernel/bpf/task_iter.c
index f21b5e1e4540e..99af4cea11025 100644
--- a/kernel/bpf/task_iter.c
+++ b/kernel/bpf/task_iter.c
@@ -29,8 +29,9 @@ static struct task_struct *task_seq_get_next(struct pid_namespace *ns,
 
 	rcu_read_lock();
 retry:
-	pid = idr_get_next(&ns->idr, tid);
+	pid = find_ge_pid(*tid, ns);
 	if (pid) {
+		*tid = pid_nr_ns(pid, ns);
 		task = get_pid_task(pid, PIDTYPE_PID);
 		if (!task) {
 			++*tid;
-- 
GitLab


From 00fa1d83a8b50351c830521d00135e823c46e7d0 Mon Sep 17 00:00:00 2001
From: Yonghong Song <yhs@fb.com>
Date: Tue, 18 Aug 2020 15:23:12 -0700
Subject: [PATCH 0289/1341] bpftool: Handle EAGAIN error code properly in pids
 collection

When the error code is EAGAIN, the kernel signals the user
space should retry the read() operation for bpf iterators.
Let us do it.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200818222312.2181675-1-yhs@fb.com
---
 tools/bpf/bpftool/pids.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/bpf/bpftool/pids.c b/tools/bpf/bpftool/pids.c
index e3b116325403b..df7d8ec760361 100644
--- a/tools/bpf/bpftool/pids.c
+++ b/tools/bpf/bpftool/pids.c
@@ -134,6 +134,8 @@ int build_obj_refs_table(struct obj_refs_table *table, enum bpf_obj_type type)
 	while (true) {
 		ret = read(fd, buf, sizeof(buf));
 		if (ret < 0) {
+			if (errno == EAGAIN)
+				continue;
 			err = -errno;
 			p_err("failed to read PID iterator output: %d", err);
 			goto out;
-- 
GitLab


From 3dabfa2bda48dab717986609762ce2a49335eb99 Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sun, 9 Aug 2020 16:49:59 +0200
Subject: [PATCH 0290/1341] clk: davinci: Use the correct size when allocating
 memory

'sizeof(*pllen)' should be used in place of 'sizeof(*pllout)' to avoid a
small over-allocation.

Fixes: 2d1726915159 ("clk: davinci: New driver for davinci PLL clocks")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/20200809144959.747986-1-christophe.jaillet@wanadoo.fr
Reviewed-by: David Lechner <david@lechnology.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
 drivers/clk/davinci/pll.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/davinci/pll.c b/drivers/clk/davinci/pll.c
index 6c35e4bb79404..0d750433eb42d 100644
--- a/drivers/clk/davinci/pll.c
+++ b/drivers/clk/davinci/pll.c
@@ -491,7 +491,7 @@ struct clk *davinci_pll_clk_register(struct device *dev,
 		parent_name = postdiv_name;
 	}
 
-	pllen = kzalloc(sizeof(*pllout), GFP_KERNEL);
+	pllen = kzalloc(sizeof(*pllen), GFP_KERNEL);
 	if (!pllen) {
 		ret = -ENOMEM;
 		goto err_unregister_postdiv;
-- 
GitLab


From e9c006bc782c488f485ffe50de20b44e1e3daa18 Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <natechancellor@gmail.com>
Date: Sun, 9 Aug 2020 21:40:20 -0700
Subject: [PATCH 0291/1341] clk: rockchip: Fix initialization of
 mux_pll_src_4plls_p
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

A new warning in Clang points out that the initialization of
mux_pll_src_4plls_p appears incorrect:

../drivers/clk/rockchip/clk-rk3228.c:140:58: warning: suspicious
concatenation of string literals in an array initialization; did you
mean to separate the elements with a comma? [-Wstring-concatenation]
PNAME(mux_pll_src_4plls_p)      = { "cpll", "gpll", "hdmiphy" "usb480m" };
                                                              ^
                                                             ,
../drivers/clk/rockchip/clk-rk3228.c:140:48: note: place parentheses
around the string literal to silence warning
PNAME(mux_pll_src_4plls_p)      = { "cpll", "gpll", "hdmiphy" "usb480m" };
                                                    ^
1 warning generated.

Given the name of the variable and the same variable name in rv1108, it
seems that this should have been four distinct elements. Fix it up by
adding the comma as suggested.

Fixes: 307a2e9ac524 ("clk: rockchip: add clock controller for rk3228")
Link: https://github.com/ClangBuiltLinux/linux/issues/1123
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://lore.kernel.org/r/20200810044020.2063350-1-natechancellor@gmail.com
Reviewed-by: Heiko Stübner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
 drivers/clk/rockchip/clk-rk3228.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clk/rockchip/clk-rk3228.c b/drivers/clk/rockchip/clk-rk3228.c
index d7243c09cc843..47d6482dda9df 100644
--- a/drivers/clk/rockchip/clk-rk3228.c
+++ b/drivers/clk/rockchip/clk-rk3228.c
@@ -137,7 +137,7 @@ PNAME(mux_usb480m_p)		= { "usb480m_phy", "xin24m" };
 PNAME(mux_hdmiphy_p)		= { "hdmiphy_phy", "xin24m" };
 PNAME(mux_aclk_cpu_src_p)	= { "cpll_aclk_cpu", "gpll_aclk_cpu", "hdmiphy_aclk_cpu" };
 
-PNAME(mux_pll_src_4plls_p)	= { "cpll", "gpll", "hdmiphy" "usb480m" };
+PNAME(mux_pll_src_4plls_p)	= { "cpll", "gpll", "hdmiphy", "usb480m" };
 PNAME(mux_pll_src_3plls_p)	= { "cpll", "gpll", "hdmiphy" };
 PNAME(mux_pll_src_2plls_p)	= { "cpll", "gpll" };
 PNAME(mux_sclk_hdmi_cec_p)	= { "cpll", "gpll", "xin24m" };
-- 
GitLab


From 0cef8e2c5a07d482ec907249dbd6687e8697677f Mon Sep 17 00:00:00 2001
From: Yu Kuai <yukuai3@huawei.com>
Date: Mon, 17 Aug 2020 19:57:26 +0800
Subject: [PATCH 0292/1341] dmaengine: at_hdmac: check return value of
 of_find_device_by_node() in at_dma_xlate()

The reurn value of of_find_device_by_node() is not checked, thus null
pointer dereference will be triggered if of_find_device_by_node()
failed.

Fixes: bbe89c8e3d59 ("at_hdmac: move to generic DMA binding")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20200817115728.1706719-2-yukuai3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/at_hdmac.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 45bbcd6146fd2..1c941f839c427 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -1650,6 +1650,8 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec,
 		return NULL;
 
 	dmac_pdev = of_find_device_by_node(dma_spec->np);
+	if (!dmac_pdev)
+		return NULL;
 
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
-- 
GitLab


From 3832b78b3ec2cf51e07102f9b4480e343459b20f Mon Sep 17 00:00:00 2001
From: Yu Kuai <yukuai3@huawei.com>
Date: Mon, 17 Aug 2020 19:57:27 +0800
Subject: [PATCH 0293/1341] dmaengine: at_hdmac: add missing put_device() call
 in at_dma_xlate()

If of_find_device_by_node() succeed, at_dma_xlate() doesn't have a
corresponding put_device(). Thus add put_device() to fix the exception
handling for this function implementation.

Fixes: bbe89c8e3d59 ("at_hdmac: move to generic DMA binding")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20200817115728.1706719-3-yukuai3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/at_hdmac.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 1c941f839c427..bf874367097cc 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -1657,8 +1657,10 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec,
 	dma_cap_set(DMA_SLAVE, mask);
 
 	atslave = kmalloc(sizeof(*atslave), GFP_KERNEL);
-	if (!atslave)
+	if (!atslave) {
+		put_device(&dmac_pdev->dev);
 		return NULL;
+	}
 
 	atslave->cfg = ATC_DST_H2SEL_HW | ATC_SRC_H2SEL_HW;
 	/*
@@ -1687,8 +1689,10 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec,
 	atslave->dma_dev = &dmac_pdev->dev;
 
 	chan = dma_request_channel(mask, at_dma_filter, atslave);
-	if (!chan)
+	if (!chan) {
+		put_device(&dmac_pdev->dev);
 		return NULL;
+	}
 
 	atchan = to_at_dma_chan(chan);
 	atchan->per_if = dma_spec->args[0] & 0xff;
-- 
GitLab


From e097eb7473d9e70da9e03276f61cd392ccb9d79f Mon Sep 17 00:00:00 2001
From: Yu Kuai <yukuai3@huawei.com>
Date: Mon, 17 Aug 2020 19:57:28 +0800
Subject: [PATCH 0294/1341] dmaengine: at_hdmac: add missing kfree() call in
 at_dma_xlate()

If memory allocation for 'atslave' succeed, at_dma_xlate() doesn't have a
corresponding kfree() in exception handling. Thus add kfree() for this
function implementation.

Fixes: bbe89c8e3d59 ("at_hdmac: move to generic DMA binding")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Link: https://lore.kernel.org/r/20200817115728.1706719-4-yukuai3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/at_hdmac.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index bf874367097cc..a2cf25c6e3b35 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -1691,6 +1691,7 @@ static struct dma_chan *at_dma_xlate(struct of_phandle_args *dma_spec,
 	chan = dma_request_channel(mask, at_dma_filter, atslave);
 	if (!chan) {
 		put_device(&dmac_pdev->dev);
+		kfree(atslave);
 		return NULL;
 	}
 
-- 
GitLab


From 6542e2b613c2b1952e83973dc434831332ce8e27 Mon Sep 17 00:00:00 2001
From: David Shah <dave@ds0.me>
Date: Tue, 18 Aug 2020 10:51:00 +0100
Subject: [PATCH 0295/1341] ARM: dts: omap5: Fix DSI base address and clocks

DSI was not probing due to base address off by 0x1000, and sys_clk
missing.

With this patch, the Pyra display works if HDMI is disabled in the
device tree.

Fixes: 5a507162f096 ("ARM: dts: Configure interconnect target module for omap5 dsi1")
Signed-off-by: David Shah <dave@ds0.me>
Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
[tony@atomide.com: standardized subject line, added fixes tag]
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 arch/arm/boot/dts/omap5.dtsi | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/arch/arm/boot/dts/omap5.dtsi b/arch/arm/boot/dts/omap5.dtsi
index 5da9cff7a53c7..a82c96258a933 100644
--- a/arch/arm/boot/dts/omap5.dtsi
+++ b/arch/arm/boot/dts/omap5.dtsi
@@ -488,11 +488,11 @@ rfbi: encoder@0  {
 					};
 				};
 
-				target-module@5000 {
+				target-module@4000 {
 					compatible = "ti,sysc-omap2", "ti,sysc";
-					reg = <0x5000 0x4>,
-					      <0x5010 0x4>,
-					      <0x5014 0x4>;
+					reg = <0x4000 0x4>,
+					      <0x4010 0x4>,
+					      <0x4014 0x4>;
 					reg-names = "rev", "sysc", "syss";
 					ti,sysc-sidle = <SYSC_IDLE_FORCE>,
 							<SYSC_IDLE_NO>,
@@ -504,7 +504,7 @@ SYSC_OMAP2_SOFTRESET |
 					ti,syss-mask = <1>;
 					#address-cells = <1>;
 					#size-cells = <1>;
-					ranges = <0 0x5000 0x1000>;
+					ranges = <0 0x4000 0x1000>;
 
 					dsi1: encoder@0 {
 						compatible = "ti,omap5-dsi";
@@ -514,8 +514,9 @@ dsi1: encoder@0 {
 						reg-names = "proto", "phy", "pll";
 						interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>;
 						status = "disabled";
-						clocks = <&dss_clkctrl OMAP5_DSS_CORE_CLKCTRL 8>;
-						clock-names = "fck";
+						clocks = <&dss_clkctrl OMAP5_DSS_CORE_CLKCTRL 8>,
+							 <&dss_clkctrl OMAP5_DSS_CORE_CLKCTRL 10>;
+						clock-names = "fck", "sys_clk";
 					};
 				};
 
@@ -545,8 +546,9 @@ dsi2: encoder@0 {
 						reg-names = "proto", "phy", "pll";
 						interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>;
 						status = "disabled";
-						clocks = <&dss_clkctrl OMAP5_DSS_CORE_CLKCTRL 8>;
-						clock-names = "fck";
+						clocks = <&dss_clkctrl OMAP5_DSS_CORE_CLKCTRL 8>,
+							 <&dss_clkctrl OMAP5_DSS_CORE_CLKCTRL 10>;
+						clock-names = "fck", "sys_clk";
 					};
 				};
 
-- 
GitLab


From e17f02d0559c174cf1f6435e45134490111eaa37 Mon Sep 17 00:00:00 2001
From: Mike Pozulp <pozulp.kernel@gmail.com>
Date: Tue, 18 Aug 2020 09:54:44 -0700
Subject: [PATCH 0296/1341] ALSA: hda/realtek: Add quirk for Samsung Galaxy
 Book Ion

The Galaxy Book Ion uses the same ALC298 codec as other Samsung laptops
which have the no headphone sound bug, like my Samsung Notebook. The
Galaxy Book owner confirmed that this patch fixes the bug.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207423
Signed-off-by: Mike Pozulp <pozulp.kernel@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200818165446.499821-1-pozulp.kernel@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_realtek.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 5722f0bd3b319..a1fa983d2a942 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -7695,6 +7695,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x144d, 0xc169, "Samsung Notebook 9 Pen (NP930SBE-K01US)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x144d, 0xc176, "Samsung Notebook 9 Pro (NP930MBE-K04US)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x144d, 0xc189, "Samsung Galaxy Flex Book (NT950QCG-X716)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
+	SND_PCI_QUIRK(0x144d, 0xc18a, "Samsung Galaxy Book Ion (NT950XCJ-X716A)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x144d, 0xc740, "Samsung Ativ book 8 (NP870Z5G)", ALC269_FIXUP_ATIV_BOOK_8),
 	SND_PCI_QUIRK(0x144d, 0xc812, "Samsung Notebook Pen S (NT950SBE-X58)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x1458, 0xfa53, "Gigabyte BXBT-2807", ALC283_FIXUP_HEADSET_MIC),
-- 
GitLab


From f8d0168e035f6359275efcfd1ad014c80e5adaa9 Mon Sep 17 00:00:00 2001
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Date: Tue, 18 Aug 2020 06:09:33 +0800
Subject: [PATCH 0297/1341] soundwire: bus: fix typo in comment on INTSTAT
 registers

s/Instat/Intstat/

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200817220933.17492-1-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/soundwire/bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c
index e6e0fb9a81b4c..da0201693c24d 100644
--- a/drivers/soundwire/bus.c
+++ b/drivers/soundwire/bus.c
@@ -1372,7 +1372,7 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave)
 		return ret;
 	}
 
-	/* Read Instat 1, Instat 2 and Instat 3 registers */
+	/* Read Intstat 1, Intstat 2 and Intstat 3 registers */
 	ret = sdw_read(slave, SDW_SCP_INT1);
 	if (ret < 0) {
 		dev_err(slave->bus->dev,
-- 
GitLab


From 5610921a4435ef45c33702073e64f835f3dca7f1 Mon Sep 17 00:00:00 2001
From: Mateusz Gorski <mateusz.gorski@linux.intel.com>
Date: Wed, 22 Jul 2020 19:35:24 +0200
Subject: [PATCH 0298/1341] ASoC: Intel: skl_hda_dsp_generic: Fix NULLptr
 dereference in autosuspend delay

Different modules for HDMI codec are used depending on the
"hda_codec_use_common_hdmi" option being enabled or not. Driver private
context for both of them is different.
This leads to null-pointer dereference error when driver tries to set
autosuspend delay for HDMI codec while the option is off (hdac_hdmi
module is used for HDMI).

Change the string in conditional statement to "ehdaudio0D0" to ensure
that only the HDAudio codec is handled by this function.

Fixes: 5bf73b1b1dec ("ASoC: intel/skl/hda - fix oops on systems without i915 audio codec")
Signed-off-by: Mateusz Gorski <mateusz.gorski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200722173524.30161-1-mateusz.gorski@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/intel/boards/skl_hda_dsp_generic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/intel/boards/skl_hda_dsp_generic.c b/sound/soc/intel/boards/skl_hda_dsp_generic.c
index ca4900036ead9..bc50eda297ab7 100644
--- a/sound/soc/intel/boards/skl_hda_dsp_generic.c
+++ b/sound/soc/intel/boards/skl_hda_dsp_generic.c
@@ -181,7 +181,7 @@ static void skl_set_hda_codec_autosuspend_delay(struct snd_soc_card *card)
 	struct snd_soc_dai *dai;
 
 	for_each_card_rtds(card, rtd) {
-		if (!strstr(rtd->dai_link->codecs->name, "ehdaudio"))
+		if (!strstr(rtd->dai_link->codecs->name, "ehdaudio0D0"))
 			continue;
 		dai = asoc_rtd_to_codec(rtd, 0);
 		hda_pvt = snd_soc_component_get_drvdata(dai->component);
-- 
GitLab


From 9ca325ffcac46ff1afe72cc3adfb96a848e26425 Mon Sep 17 00:00:00 2001
From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Date: Wed, 19 Aug 2020 10:17:33 +0300
Subject: [PATCH 0299/1341] tools: usb: move to tools buildsystem

Converting the Makefile to use the new tools buildsystem.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
[fixes builds with O=...]
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200819071733.60028-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 tools/usb/Build    |  2 ++
 tools/usb/Makefile | 53 +++++++++++++++++++++++++++++++++++++++-------
 2 files changed, 47 insertions(+), 8 deletions(-)
 create mode 100644 tools/usb/Build

diff --git a/tools/usb/Build b/tools/usb/Build
new file mode 100644
index 0000000000000..2ad6f97458168
--- /dev/null
+++ b/tools/usb/Build
@@ -0,0 +1,2 @@
+testusb-y += testusb.o
+ffs-test-y += ffs-test.o
diff --git a/tools/usb/Makefile b/tools/usb/Makefile
index 01d758d73b6db..1b128e551b2e4 100644
--- a/tools/usb/Makefile
+++ b/tools/usb/Makefile
@@ -1,14 +1,51 @@
 # SPDX-License-Identifier: GPL-2.0
 # Makefile for USB tools
+include ../scripts/Makefile.include
 
-PTHREAD_LIBS = -lpthread
-WARNINGS = -Wall -Wextra
-CFLAGS = $(WARNINGS) -g -I../include
-LDFLAGS = $(PTHREAD_LIBS)
+bindir ?= /usr/bin
 
-all: testusb ffs-test
-%: %.c
-	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+ifeq ($(srctree),)
+srctree := $(patsubst %/,%,$(dir $(CURDIR)))
+srctree := $(patsubst %/,%,$(dir $(srctree)))
+endif
+
+# Do not use make's built-in rules
+# (this improves performance and avoids hard-to-debug behaviour);
+MAKEFLAGS += -r
+
+override CFLAGS += -O2 -Wall -Wextra -g -D_GNU_SOURCE -I$(OUTPUT)include -I$(srctree)/tools/include
+override LDFLAGS += -lpthread
+
+ALL_TARGETS := testusb ffs-test
+ALL_PROGRAMS := $(patsubst %,$(OUTPUT)%,$(ALL_TARGETS))
+
+all: $(ALL_PROGRAMS)
+
+export srctree OUTPUT CC LD CFLAGS
+include $(srctree)/tools/build/Makefile.include
+
+TESTUSB_IN := $(OUTPUT)testusb-in.o
+$(TESTUSB_IN): FORCE
+	$(Q)$(MAKE) $(build)=testusb
+$(OUTPUT)testusb: $(TESTUSB_IN)
+	$(QUIET_LINK)$(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
+
+FFS_TEST_IN := $(OUTPUT)ffs-test-in.o
+$(FFS_TEST_IN): FORCE
+	$(Q)$(MAKE) $(build)=ffs-test
+$(OUTPUT)ffs-test: $(FFS_TEST_IN)
+	$(QUIET_LINK)$(CC) $(CFLAGS) $< -o $@ $(LDFLAGS)
 
 clean:
-	$(RM) testusb ffs-test
+	rm -f $(ALL_PROGRAMS)
+	find $(if $(OUTPUT),$(OUTPUT),.) -name '*.o' -delete -o -name '\.*.d' -delete -o -name '\.*.o.cmd' -delete
+
+install: $(ALL_PROGRAMS)
+	install -d -m 755 $(DESTDIR)$(bindir);		\
+	for program in $(ALL_PROGRAMS); do		\
+		install $$program $(DESTDIR)$(bindir);	\
+	done
+
+FORCE:
+
+.PHONY: all install clean FORCE prepare
-- 
GitLab


From 9a469bc9f32dd33c7aac5744669d21a023a719cd Mon Sep 17 00:00:00 2001
From: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Date: Tue, 18 Aug 2020 19:27:47 -0700
Subject: [PATCH 0300/1341] usb: uas: Add quirk for PNY Pro Elite

PNY Pro Elite USB 3.1 Gen 2 device (SSD) doesn't respond to ATA_12
pass-through command (i.e. it just hangs). If it doesn't support this
command, it should respond properly to the host. Let's just add a quirk
to be able to move forward with other operations.

Cc: stable@vger.kernel.org
Signed-off-by: Thinh Nguyen <thinhn@synopsys.com>
Link: https://lore.kernel.org/r/2b0585228b003eedcc82db84697b31477df152e0.1597803605.git.thinhn@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/storage/unusual_uas.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/storage/unusual_uas.h b/drivers/usb/storage/unusual_uas.h
index 162b09d69f62f..971f8a4354c8c 100644
--- a/drivers/usb/storage/unusual_uas.h
+++ b/drivers/usb/storage/unusual_uas.h
@@ -80,6 +80,13 @@ UNUSUAL_DEV(0x152d, 0x0578, 0x0000, 0x9999,
 		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
 		US_FL_BROKEN_FUA),
 
+/* Reported-by: Thinh Nguyen <thinhn@synopsys.com> */
+UNUSUAL_DEV(0x154b, 0xf00d, 0x0000, 0x9999,
+		"PNY",
+		"Pro Elite SSD",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_NO_ATA_1X),
+
 /* Reported-by: Hans de Goede <hdegoede@redhat.com> */
 UNUSUAL_DEV(0x2109, 0x0711, 0x0000, 0x9999,
 		"VIA",
-- 
GitLab


From df3ab3cb7eae63c6eb7c9aebcc196a75d59f65dd Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 16 Jul 2020 10:46:43 +0100
Subject: [PATCH 0301/1341] drm/i915: Provide the perf pmu.module

Rather than manually implement our own module reference counting for perf
pmu events, finally realise that there is a module parameter to struct
pmu for this very purpose.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: stable@vger.kernel.org
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200716094643.31410-1-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit 27e897beec1c59861f15d4d3562c39ad1143620f)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/i915_pmu.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
index 28bc5f13ae521..056994224c6bc 100644
--- a/drivers/gpu/drm/i915/i915_pmu.c
+++ b/drivers/gpu/drm/i915/i915_pmu.c
@@ -445,8 +445,6 @@ static void i915_pmu_event_destroy(struct perf_event *event)
 		container_of(event->pmu, typeof(*i915), pmu.base);
 
 	drm_WARN_ON(&i915->drm, event->parent);
-
-	module_put(THIS_MODULE);
 }
 
 static int
@@ -538,10 +536,8 @@ static int i915_pmu_event_init(struct perf_event *event)
 	if (ret)
 		return ret;
 
-	if (!event->parent) {
-		__module_get(THIS_MODULE);
+	if (!event->parent)
 		event->destroy = i915_pmu_event_destroy;
-	}
 
 	return 0;
 }
@@ -1130,6 +1126,7 @@ void i915_pmu_register(struct drm_i915_private *i915)
 	if (!pmu->base.attr_groups)
 		goto err_attr;
 
+	pmu->base.module	= THIS_MODULE;
 	pmu->base.task_ctx_nr	= perf_invalid_context;
 	pmu->base.event_init	= i915_pmu_event_init;
 	pmu->base.add		= i915_pmu_event_add;
-- 
GitLab


From c499f6cb5ea4708c0c3d76a3c49917f8d905f4d4 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 28 Jul 2020 16:06:00 +0100
Subject: [PATCH 0302/1341] drm/i915: Copy default modparams to mock
 i915_device

Since we use the module parameters stored inside the drm_i915_device
itself, we need to ensure the mock i915_device also sets up the right
defaults.

Fixes: 8a25c4be583d ("drm/i915/params: switch to device specific parameters")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200728150600.4509-1-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit 98ef067453709444a264939940f7b3a5dfdfa09e)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/selftests/mock_gem_device.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index b9810bf156c36..f127e633f7ca8 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -78,6 +78,7 @@ static void mock_device_release(struct drm_device *dev)
 	drm_mode_config_cleanup(&i915->drm);
 
 out:
+	i915_params_free(&i915->params);
 	put_device(&i915->drm.pdev->dev);
 	i915->drm.pdev = NULL;
 }
@@ -165,6 +166,8 @@ struct drm_i915_private *mock_gem_device(void)
 	i915->drm.pdev = pdev;
 	drmm_add_final_kfree(&i915->drm, i915);
 
+	i915_params_copy(&i915->params, &i915_modparams);
+
 	intel_runtime_pm_init_early(&i915->runtime_pm);
 
 	/* Using the global GTT may ask questions about KMS users, so prepare */
-- 
GitLab


From b7c664611789a96dd0bb32e0fd3e9bb405ba1179 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Wed, 29 Jul 2020 14:09:12 +0100
Subject: [PATCH 0303/1341] drm/i915/display: Check for an LPSP encoder before
 dereferencing
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Avoid a GPF at

<1>[   20.177320] BUG: kernel NULL pointer dereference, address: 000000000000007c
<1>[   20.177322] #PF: supervisor read access in kernel mode
<1>[   20.177323] #PF: error_code(0x0000) - not-present page
<6>[   20.177324] PGD 0 P4D 0
<4>[   20.177327] Oops: 0000 [#1] PREEMPT SMP PTI
<4>[   20.177328] CPU: 1 PID: 944 Comm: debugfs_test Not tainted 5.8.0-rc7-CI-CI_DRM_8814+ #1
<4>[   20.177330] Hardware name: Dell Inc. XPS 13 9360/0823VW, BIOS 2.9.0 07/09/2018
<4>[   20.177372] RIP: 0010:i915_lpsp_capability_show+0x44/0xc0 [i915]
<4>[   20.177374] Code: 0f b6 81 ca 0d 00 00 3c 0b 74 77 76 19 3c 0c 75 44 83 7e 7c 01 7e 2f 48 c7 c6 d7 b9 47 a0 e8 43 df 06 e1 31 c0 c3 3c 09 72 2b <8b> 46 7c 85 c0 75 e6 8b 82 e4 00 00 00 89 c2 83 e2 fb 83 fa 0a 74
<4>[   20.177376] RSP: 0018:ffffc90000cebe38 EFLAGS: 00010246
<4>[   20.177377] RAX: 0000000000000009 RBX: ffff888267fe6a58 RCX: ffff888252d10000
<4>[   20.177378] RDX: ffff88824a9a4000 RSI: 0000000000000000 RDI: ffff888267fe6a30
<4>[   20.177379] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
<4>[   20.177380] R10: 0000000000000001 R11: 0000000000000000 R12: ffffc90000cebf08
<4>[   20.177381] R13: 00000000ffffffff R14: 0000000000000001 R15: ffff888267fe6a30
<4>[   20.177383] FS:  00007f6f9c6b5e40(0000) GS:ffff888276480000(0000) knlGS:0000000000000000
<4>[   20.177384] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
<4>[   20.177385] CR2: 000000000000007c CR3: 0000000255f04006 CR4: 00000000003606e0
<4>[   20.177386] Call Trace:
<4>[   20.177390]  seq_read+0xcb/0x420

which is presumably from having no encoder attached at that time.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2175
Fixes: 8806211fe7b3 ("drm/i915: Add i915_lpsp_capability debugfs")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Animesh Manna <animesh.manna@intel.com>
Cc: Anshuman Gupta <anshuman.gupta@intel.com>
Cc: Uma Shankar <uma.shankar@intel.com>
Cc: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
Reviewed-by: Anshuman Gupta <anshuman.gupta@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200729130912.30093-1-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit a22b1a9bb0d72a58d5b836653f28d97ee8fea1c4)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_debugfs.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 3644752cc5ece..5a5cfe25085b4 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -2044,9 +2044,12 @@ DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
 static int i915_lpsp_capability_show(struct seq_file *m, void *data)
 {
 	struct drm_connector *connector = m->private;
-	struct intel_encoder *encoder =
-			intel_attached_encoder(to_intel_connector(connector));
 	struct drm_i915_private *i915 = to_i915(connector->dev);
+	struct intel_encoder *encoder;
+
+	encoder = intel_attached_encoder(to_intel_connector(connector));
+	if (!encoder)
+		return -ENODEV;
 
 	if (connector->status != connector_status_connected)
 		return -ENODEV;
-- 
GitLab


From 5fd73c53701327e725cd4ca70decb5c9a61f3bac Mon Sep 17 00:00:00 2001
From: Matt Roper <matthew.d.roper@intel.com>
Date: Fri, 12 Jun 2020 13:47:34 -0700
Subject: [PATCH 0304/1341] drm/i915: Update bw_buddy pagemask table

A recent bspec update removed the LPDDR4 single channel entry from the
buddy register table, but added a new four-channel entry.

Workaround 1409767108 hasn't been updated with any guidance for four
channel configurations, so we leave that alternate table unchanged for
now.

Bspec 49218
Fixes: 3fa01d642fa7 ("drm/i915/tgl: Program BW_BUDDY registers during display init")
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200612204734.3674650-1-matthew.d.roper@intel.com
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit ecb40d0826fda213ebb58d49e7d5b4752480e130)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_power.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 0c713e83274dd..4929d890bd1cc 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -5240,10 +5240,10 @@ struct buddy_page_mask {
 };
 
 static const struct buddy_page_mask tgl_buddy_page_masks[] = {
-	{ .num_channels = 1, .type = INTEL_DRAM_LPDDR4, .page_mask = 0xE },
 	{ .num_channels = 1, .type = INTEL_DRAM_DDR4,   .page_mask = 0xF },
 	{ .num_channels = 2, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x1C },
 	{ .num_channels = 2, .type = INTEL_DRAM_DDR4,   .page_mask = 0x1F },
+	{ .num_channels = 4, .type = INTEL_DRAM_LPDDR4, .page_mask = 0x38 },
 	{}
 };
 
-- 
GitLab


From c67f0c28311c44597ecd8e14d152d1775c367cdf Mon Sep 17 00:00:00 2001
From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Date: Sun, 2 Aug 2020 19:15:35 +0800
Subject: [PATCH 0305/1341] drm/i915: Fix wrong return value in
 intel_atomic_check()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In the case of calling check_digital_port_conflicts() failed, a
negative error code -EINVAL should be returned.

Fixes: bf5da83e4bd80 ("drm/i915: Move check_digital_port_conflicts() earier")
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200802111535.5200-1-tianjia.zhang@linux.alibaba.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit 66b51b801d05ee54a0f23628cb8220189adb715e)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 729ec6e0d43a0..b2ec3a5141cca 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -14930,7 +14930,7 @@ static int intel_atomic_check(struct drm_device *dev,
 	if (any_ms && !check_digital_port_conflicts(state)) {
 		drm_dbg_kms(&dev_priv->drm,
 			    "rejecting conflicting digital port configuration\n");
-		ret = EINVAL;
+		ret = -EINVAL;
 		goto fail;
 	}
 
-- 
GitLab


From c43a87f537d19499e51a6f013331f196d8f0ddbe Mon Sep 17 00:00:00 2001
From: George Spelvin <lkml@SDF.ORG>
Date: Wed, 25 Mar 2020 19:24:29 +0000
Subject: [PATCH 0306/1341] drm/i915/selftests: Avoid passing a random 0 into
 ilog2

igt_mm_config() calls ilog2() on the (pseudo)random 21-bit number
s>>12.  Once in 2 million seeds, this is zero and ilog2 summons
the nasal demons.

There was an attempt to handle this case with a max(), but that's
too late; ms could already be something bizarre.

Given that the low 12 bits of s and ms are always zero, it's a lot
simpler just to divide them by 4096, then everything fits into 32
bits, and we can easily generate a random number 1 <= s <= 0x1fffff.

Fixes: 14d1b9a6247c ("drm/i915: buddy allocator")
Signed-off-by: George Spelvin <lkml@sdf.org>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200325192429.GA8865@SDF.ORG
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit 21118e8e56479ef33460fbd63a5ad0535843b666)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/selftests/i915_buddy.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/i915/selftests/i915_buddy.c b/drivers/gpu/drm/i915/selftests/i915_buddy.c
index 939a6caebb034..632b912b0bc9b 100644
--- a/drivers/gpu/drm/i915/selftests/i915_buddy.c
+++ b/drivers/gpu/drm/i915/selftests/i915_buddy.c
@@ -8,8 +8,6 @@
 #include "../i915_selftest.h"
 #include "i915_random.h"
 
-#define SZ_8G (1ULL << 33)
-
 static void __igt_dump_block(struct i915_buddy_mm *mm,
 			     struct i915_buddy_block *block,
 			     bool buddy)
@@ -281,18 +279,22 @@ static int igt_check_mm(struct i915_buddy_mm *mm)
 static void igt_mm_config(u64 *size, u64 *chunk_size)
 {
 	I915_RND_STATE(prng);
-	u64 s, ms;
+	u32 s, ms;
 
 	/* Nothing fancy, just try to get an interesting bit pattern */
 
 	prandom_seed_state(&prng, i915_selftest.random_seed);
 
-	s = i915_prandom_u64_state(&prng) & (SZ_8G - 1);
-	ms = BIT_ULL(12 + (prandom_u32_state(&prng) % ilog2(s >> 12)));
-	s = max(s & -ms, ms);
+	/* Let size be a random number of pages up to 8 GB (2M pages) */
+	s = 1 + i915_prandom_u32_max_state((BIT(33 - 12)) - 1, &prng);
+	/* Let the chunk size be a random power of 2 less than size */
+	ms = BIT(i915_prandom_u32_max_state(ilog2(s), &prng));
+	/* Round size down to the chunk size */
+	s &= -ms;
 
-	*chunk_size = ms;
-	*size = s;
+	/* Convert from pages to bytes */
+	*chunk_size = (u64)ms << 12;
+	*size = (u64)s << 12;
 }
 
 static int igt_buddy_alloc_smoke(void *arg)
-- 
GitLab


From 4a4064ad79699ee41b74c12fa4f9f960a5bf9b2d Mon Sep 17 00:00:00 2001
From: Imre Deak <imre.deak@intel.com>
Date: Tue, 21 Jul 2020 02:29:52 +0300
Subject: [PATCH 0307/1341] drm/i915/tgl: Make sure TC-cold is blocked before
 enabling TC AUX power wells
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The dependency between power wells is determined by the ordering of the
power well list: when enabling the power wells for a domain, this
happens walking the power well list forward, while disabling them
happens in the reverse direction. Accordingly a power well on the list
must follow any other power well it depends on.

Since the TC AUX power wells depend on TC-cold being blocked, move the
TC-cold off power well before all AUX power wells.

Fixes: 3c02934b24e3 ("drm/i915/tc/tgl: Implement TC cold sequences")
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200720232952.16228-1-imre.deak@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit b302a2e68807604af2a5015816c1d117747989b6)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_power.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 4929d890bd1cc..e0fcb89c736b7 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -4146,6 +4146,12 @@ static const struct i915_power_well_desc tgl_power_wells[] = {
 			.hsw.idx = TGL_PW_CTL_IDX_DDI_TC6,
 		},
 	},
+	{
+		.name = "TC cold off",
+		.domains = TGL_TC_COLD_OFF_POWER_DOMAINS,
+		.ops = &tgl_tc_cold_off_ops,
+		.id = DISP_PW_ID_NONE,
+	},
 	{
 		.name = "AUX A",
 		.domains = TGL_AUX_A_IO_POWER_DOMAINS,
@@ -4332,12 +4338,6 @@ static const struct i915_power_well_desc tgl_power_wells[] = {
 			.hsw.irq_pipe_mask = BIT(PIPE_D),
 		},
 	},
-	{
-		.name = "TC cold off",
-		.domains = TGL_TC_COLD_OFF_POWER_DOMAINS,
-		.ops = &tgl_tc_cold_off_ops,
-		.id = DISP_PW_ID_NONE,
-	},
 };
 
 static const struct i915_power_well_desc rkl_power_wells[] = {
-- 
GitLab


From b90b925fd52c75ee7531df739d850a1f7c58ef06 Mon Sep 17 00:00:00 2001
From: Sameer Pujar <spujar@nvidia.com>
Date: Wed, 19 Aug 2020 21:02:10 +0530
Subject: [PATCH 0308/1341] ALSA: hda: avoid reset of sdo_limit

By default 'sdo_limit' is initialized with a default value of '8'
as per spec. This is overridden in cases where a different value is
required. However this is getting reset when snd_hdac_bus_init_chip()
is called again, which happens during runtime PM cycle.

Avoid this reset by moving 'sdo_limit' setup to 'snd_hdac_bus_init()'
function which would be called only once.

Fixes: 67ae482a59e9 ("ALSA: hda: add member to store ratio for stripe control")
Cc: <stable@vger.kernel.org>
Signed-off-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/1597851130-6765-1-git-send-email-spujar@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/hda/hdac_bus.c        | 12 ++++++++++++
 sound/hda/hdac_controller.c | 11 -----------
 2 files changed, 12 insertions(+), 11 deletions(-)

diff --git a/sound/hda/hdac_bus.c b/sound/hda/hdac_bus.c
index 09ddab5f5caeb..9766f6af87430 100644
--- a/sound/hda/hdac_bus.c
+++ b/sound/hda/hdac_bus.c
@@ -46,6 +46,18 @@ int snd_hdac_bus_init(struct hdac_bus *bus, struct device *dev,
 	INIT_LIST_HEAD(&bus->hlink_list);
 	init_waitqueue_head(&bus->rirb_wq);
 	bus->irq = -1;
+
+	/*
+	 * Default value of '8' is as per the HD audio specification (Rev 1.0a).
+	 * Following relation is used to derive STRIPE control value.
+	 *  For sample rate <= 48K:
+	 *   { ((num_channels * bits_per_sample) / number of SDOs) >= 8 }
+	 *  For sample rate > 48K:
+	 *   { ((num_channels * bits_per_sample * rate/48000) /
+	 *	number of SDOs) >= 8 }
+	 */
+	bus->sdo_limit = 8;
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(snd_hdac_bus_init);
diff --git a/sound/hda/hdac_controller.c b/sound/hda/hdac_controller.c
index 011b17cc1efa2..b98449fd92f3b 100644
--- a/sound/hda/hdac_controller.c
+++ b/sound/hda/hdac_controller.c
@@ -529,17 +529,6 @@ bool snd_hdac_bus_init_chip(struct hdac_bus *bus, bool full_reset)
 
 	bus->chip_init = true;
 
-	/*
-	 * Default value of '8' is as per the HD audio specification (Rev 1.0a).
-	 * Following relation is used to derive STRIPE control value.
-	 *  For sample rate <= 48K:
-	 *   { ((num_channels * bits_per_sample) / number of SDOs) >= 8 }
-	 *  For sample rate > 48K:
-	 *   { ((num_channels * bits_per_sample * rate/48000) /
-	 *	number of SDOs) >= 8 }
-	 */
-	bus->sdo_limit = 8;
-
 	return true;
 }
 EXPORT_SYMBOL_GPL(snd_hdac_bus_init_chip);
-- 
GitLab


From 00a3fff0712cd9cc4112ecf6da0916f8503e2a86 Mon Sep 17 00:00:00 2001
From: Shijie Luo <luoshijie1@huawei.com>
Date: Mon, 10 Aug 2020 22:21:28 -0400
Subject: [PATCH 0309/1341] jbd2: clean up checksum verification in
 do_one_pass()

Remove the unnecessary chksum_err and checksum_seen variables as well as
some redundant code to make the function easier to understand.

[ With changes suggested by jack@ and tytso@ ]

Signed-off-by: Shijie Luo <luoshijie1@huawei.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20200819122955.33526-1-luoshijie1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/jbd2/recovery.c | 46 ++++++++++++----------------------------------
 1 file changed, 12 insertions(+), 34 deletions(-)

diff --git a/fs/jbd2/recovery.c b/fs/jbd2/recovery.c
index 2ed278f0dcede..faa97d748474d 100644
--- a/fs/jbd2/recovery.c
+++ b/fs/jbd2/recovery.c
@@ -690,14 +690,11 @@ static int do_one_pass(journal_t *journal,
 			 * number. */
 			if (pass == PASS_SCAN &&
 			    jbd2_has_feature_checksum(journal)) {
-				int chksum_err, chksum_seen;
 				struct commit_header *cbh =
 					(struct commit_header *)bh->b_data;
 				unsigned found_chksum =
 					be32_to_cpu(cbh->h_chksum[0]);
 
-				chksum_err = chksum_seen = 0;
-
 				if (info->end_transaction) {
 					journal->j_failed_commit =
 						info->end_transaction;
@@ -705,42 +702,23 @@ static int do_one_pass(journal_t *journal,
 					break;
 				}
 
-				if (crc32_sum == found_chksum &&
-				    cbh->h_chksum_type == JBD2_CRC32_CHKSUM &&
-				    cbh->h_chksum_size ==
-						JBD2_CRC32_CHKSUM_SIZE)
-				       chksum_seen = 1;
-				else if (!(cbh->h_chksum_type == 0 &&
-					     cbh->h_chksum_size == 0 &&
-					     found_chksum == 0 &&
-					     !chksum_seen))
-				/*
-				 * If fs is mounted using an old kernel and then
-				 * kernel with journal_chksum is used then we
-				 * get a situation where the journal flag has
-				 * checksum flag set but checksums are not
-				 * present i.e chksum = 0, in the individual
-				 * commit blocks.
-				 * Hence to avoid checksum failures, in this
-				 * situation, this extra check is added.
-				 */
-						chksum_err = 1;
-
-				if (chksum_err) {
-					info->end_transaction = next_commit_ID;
-
-					if (!jbd2_has_feature_async_commit(journal)) {
-						journal->j_failed_commit =
-							next_commit_ID;
-						brelse(bh);
-						break;
-					}
-				}
+				/* Neither checksum match nor unused? */
+				if (!((crc32_sum == found_chksum &&
+				       cbh->h_chksum_type ==
+						JBD2_CRC32_CHKSUM &&
+				       cbh->h_chksum_size ==
+						JBD2_CRC32_CHKSUM_SIZE) ||
+				      (cbh->h_chksum_type == 0 &&
+				       cbh->h_chksum_size == 0 &&
+				       found_chksum == 0)))
+					goto chksum_error;
+
 				crc32_sum = ~0;
 			}
 			if (pass == PASS_SCAN &&
 			    !jbd2_commit_block_csum_verify(journal,
 							   bh->b_data)) {
+			chksum_error:
 				info->end_transaction = next_commit_ID;
 
 				if (!jbd2_has_feature_async_commit(journal)) {
-- 
GitLab


From 7ca4fcba92edf82b05533a6e4f6b19a5fbec6f54 Mon Sep 17 00:00:00 2001
From: kyoungho koo <rnrudgh@gmail.com>
Date: Sat, 25 Apr 2020 02:16:24 +0900
Subject: [PATCH 0310/1341] ext4: Fix comment typo "the the".

I have found double typed comments "the the". So i modified it to
one "the"

Signed-off-by: kyoungho koo <rnrudgh@gmail.com>
Link: https://lore.kernel.org/r/20200424171620.GA11943@koo-Z370-HD3
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/inline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 13054653a06a3..75c97bca08156 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -276,7 +276,7 @@ static int ext4_create_inline_data(handle_t *handle,
 		len = 0;
 	}
 
-	/* Insert the the xttr entry. */
+	/* Insert the xttr entry. */
 	i.value = value;
 	i.value_len = len;
 
-- 
GitLab


From c55ee7d202857b000531c2acfe8ce7cba5b77b5c Mon Sep 17 00:00:00 2001
From: brookxu <brookxu.cn@gmail.com>
Date: Sat, 15 Aug 2020 08:10:44 +0800
Subject: [PATCH 0311/1341] ext4: add mb_debug logging when there are lost
 chunks

Lost chunks are when some other process raced with the current thread
to grab a particular block allocation.  Add mb_debug log for
developers who wants to see how often this is happening for a
particular workload.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Link: https://lore.kernel.org/r/0a165ac0-1912-aebd-8a0d-b42e7cd1aea1@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/mballoc.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 51e2fe6094bea..0993044cfe466 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2309,6 +2309,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 	struct ext4_sb_info *sbi;
 	struct super_block *sb;
 	struct ext4_buddy e4b;
+	unsigned int lost;
 
 	sb = ac->ac_sb;
 	sbi = EXT4_SB(sb);
@@ -2456,22 +2457,24 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 		 * We've been searching too long. Let's try to allocate
 		 * the best chunk we've found so far
 		 */
-
 		ext4_mb_try_best_found(ac, &e4b);
 		if (ac->ac_status != AC_STATUS_FOUND) {
 			/*
 			 * Someone more lucky has already allocated it.
 			 * The only thing we can do is just take first
 			 * found block(s)
-			printk(KERN_DEBUG "EXT4-fs: someone won our chunk\n");
 			 */
+			lost = (unsigned int)atomic_inc_return(&sbi->s_mb_lost_chunks);
+			mb_debug(sb, "lost chunk, group: %u, start: %d, len: %d, lost: %u\n",
+				 ac->ac_b_ex.fe_group, ac->ac_b_ex.fe_start,
+				 ac->ac_b_ex.fe_len, lost);
+
 			ac->ac_b_ex.fe_group = 0;
 			ac->ac_b_ex.fe_start = 0;
 			ac->ac_b_ex.fe_len = 0;
 			ac->ac_status = AC_STATUS_CONTINUE;
 			ac->ac_flags |= EXT4_MB_HINT_FIRST;
 			cr = 3;
-			atomic_inc(&sbi->s_mb_lost_chunks);
 			goto repeat;
 		}
 	}
-- 
GitLab


From 66d5e0277e225cdc5d272fc22b1aa90a9b0d21ac Mon Sep 17 00:00:00 2001
From: brookxu <brookxu.cn@gmail.com>
Date: Mon, 17 Aug 2020 15:36:06 +0800
Subject: [PATCH 0312/1341] ext4: reorganize if statement of
 ext4_mb_release_context()

Reorganize the if statement of ext4_mb_release_context(), make it
easier to read.

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Link: https://lore.kernel.org/r/5439ac6f-db79-ad68-76c1-a4dda9aa0cc3@gmail.com
Reviewed-by: Ritesh Harjani <riteshh@linux.ibm.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 fs/ext4/mballoc.c | 33 ++++++++++++++++-----------------
 1 file changed, 16 insertions(+), 17 deletions(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 0993044cfe466..45ac6088b4ac4 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2309,7 +2309,7 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 	struct ext4_sb_info *sbi;
 	struct super_block *sb;
 	struct ext4_buddy e4b;
-	unsigned int lost;
+	int lost;
 
 	sb = ac->ac_sb;
 	sbi = EXT4_SB(sb);
@@ -2464,8 +2464,8 @@ ext4_mb_regular_allocator(struct ext4_allocation_context *ac)
 			 * The only thing we can do is just take first
 			 * found block(s)
 			 */
-			lost = (unsigned int)atomic_inc_return(&sbi->s_mb_lost_chunks);
-			mb_debug(sb, "lost chunk, group: %u, start: %d, len: %d, lost: %u\n",
+			lost = atomic_inc_return(&sbi->s_mb_lost_chunks);
+			mb_debug(sb, "lost chunk, group: %u, start: %d, len: %d, lost: %d\n",
 				 ac->ac_b_ex.fe_group, ac->ac_b_ex.fe_start,
 				 ac->ac_b_ex.fe_len, lost);
 
@@ -4706,20 +4706,19 @@ static int ext4_mb_release_context(struct ext4_allocation_context *ac)
 			pa->pa_free -= ac->ac_b_ex.fe_len;
 			pa->pa_len -= ac->ac_b_ex.fe_len;
 			spin_unlock(&pa->pa_lock);
-		}
-	}
-	if (pa) {
-		/*
-		 * We want to add the pa to the right bucket.
-		 * Remove it from the list and while adding
-		 * make sure the list to which we are adding
-		 * doesn't grow big.
-		 */
-		if ((pa->pa_type == MB_GROUP_PA) && likely(pa->pa_free)) {
-			spin_lock(pa->pa_obj_lock);
-			list_del_rcu(&pa->pa_inode_list);
-			spin_unlock(pa->pa_obj_lock);
-			ext4_mb_add_n_trim(ac);
+
+			/*
+			 * We want to add the pa to the right bucket.
+			 * Remove it from the list and while adding
+			 * make sure the list to which we are adding
+			 * doesn't grow big.
+			 */
+			if (likely(pa->pa_free)) {
+				spin_lock(pa->pa_obj_lock);
+				list_del_rcu(&pa->pa_inode_list);
+				spin_unlock(pa->pa_obj_lock);
+				ext4_mb_add_n_trim(ac);
+			}
 		}
 		ext4_mb_put_pa(ac, ac->ac_sb, pa);
 	}
-- 
GitLab


From 27bc446e2def38db3244a6eb4bb1d6312936610a Mon Sep 17 00:00:00 2001
From: brookxu <brookxu.cn@gmail.com>
Date: Mon, 17 Aug 2020 15:36:15 +0800
Subject: [PATCH 0313/1341] ext4: limit the length of per-inode prealloc list
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In the scenario of writing sparse files, the per-inode prealloc list may
be very long, resulting in high overhead for ext4_mb_use_preallocated().
To circumvent this problem, we limit the maximum length of per-inode
prealloc list to 512 and allow users to modify it.

After patching, we observed that the sys ratio of cpu has dropped, and
the system throughput has increased significantly. We created a process
to write the sparse file, and the running time of the process on the
fixed kernel was significantly reduced, as follows:

Running time on unfixed kernel：
[root@TENCENT64 ~]# time taskset 0x01 ./sparse /data1/sparce.dat
real    0m2.051s
user    0m0.008s
sys     0m2.026s

Running time on fixed kernel：
[root@TENCENT64 ~]# time taskset 0x01 ./sparse /data1/sparce.dat
real    0m0.471s
user    0m0.004s
sys     0m0.395s

Signed-off-by: Chunguang Xu <brookxu@tencent.com>
Link: https://lore.kernel.org/r/d7a98178-056b-6db5-6bce-4ead23f4a257@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 Documentation/admin-guide/ext4.rst |  3 ++
 fs/ext4/ext4.h                     |  4 +-
 fs/ext4/extents.c                  | 10 ++--
 fs/ext4/file.c                     |  2 +-
 fs/ext4/indirect.c                 |  2 +-
 fs/ext4/inode.c                    |  6 +--
 fs/ext4/ioctl.c                    |  2 +-
 fs/ext4/mballoc.c                  | 74 ++++++++++++++++++++++++++----
 fs/ext4/mballoc.h                  |  4 ++
 fs/ext4/move_extent.c              |  4 +-
 fs/ext4/super.c                    |  3 +-
 fs/ext4/sysfs.c                    |  2 +
 include/trace/events/ext4.h        | 17 ++++---
 13 files changed, 104 insertions(+), 29 deletions(-)

diff --git a/Documentation/admin-guide/ext4.rst b/Documentation/admin-guide/ext4.rst
index 7fc6a72920c98..59bcc4a926027 100644
--- a/Documentation/admin-guide/ext4.rst
+++ b/Documentation/admin-guide/ext4.rst
@@ -482,6 +482,9 @@ Files in /sys/fs/ext4/<devname>:
         multiple of this tuning parameter if the stripe size is not set in the
         ext4 superblock
 
+  mb_max_inode_prealloc
+        The maximum length of per-inode ext4_prealloc_space list.
+
   mb_max_to_scan
         The maximum number of extents the multiblock allocator will search to
         find the best extent.
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 71b4370a3f91c..523e00d7b3924 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1070,6 +1070,7 @@ struct ext4_inode_info {
 	struct timespec64 i_crtime;
 
 	/* mballoc */
+	atomic_t i_prealloc_active;
 	struct list_head i_prealloc_list;
 	spinlock_t i_prealloc_lock;
 
@@ -1518,6 +1519,7 @@ struct ext4_sb_info {
 	unsigned int s_mb_stats;
 	unsigned int s_mb_order2_reqs;
 	unsigned int s_mb_group_prealloc;
+	unsigned int s_mb_max_inode_prealloc;
 	unsigned int s_max_dir_size_kb;
 	/* where last allocation was done - for stream allocation */
 	unsigned long s_mb_last_group;
@@ -2682,7 +2684,7 @@ extern int ext4_mb_release(struct super_block *);
 extern ext4_fsblk_t ext4_mb_new_blocks(handle_t *,
 				struct ext4_allocation_request *, int *);
 extern int ext4_mb_reserve_blocks(struct super_block *, int);
-extern void ext4_discard_preallocations(struct inode *);
+extern void ext4_discard_preallocations(struct inode *, unsigned int);
 extern int __init ext4_init_mballoc(void);
 extern void ext4_exit_mballoc(void);
 extern ext4_group_t ext4_mb_prefetch(struct super_block *sb,
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 0eea09aa0f267..a0481582187a3 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -100,7 +100,7 @@ static int ext4_ext_trunc_restart_fn(struct inode *inode, int *dropped)
 	 * i_mutex. So we can safely drop the i_data_sem here.
 	 */
 	BUG_ON(EXT4_JOURNAL(inode) == NULL);
-	ext4_discard_preallocations(inode);
+	ext4_discard_preallocations(inode, 0);
 	up_write(&EXT4_I(inode)->i_data_sem);
 	*dropped = 1;
 	return 0;
@@ -4266,7 +4266,7 @@ int ext4_ext_map_blocks(handle_t *handle, struct inode *inode,
 			 * not a good idea to call discard here directly,
 			 * but otherwise we'd need to call it every free().
 			 */
-			ext4_discard_preallocations(inode);
+			ext4_discard_preallocations(inode, 0);
 			if (flags & EXT4_GET_BLOCKS_DELALLOC_RESERVE)
 				fb_flags = EXT4_FREE_BLOCKS_NO_QUOT_UPDATE;
 			ext4_free_blocks(handle, inode, NULL, newblock,
@@ -5293,7 +5293,7 @@ static int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
 	}
 
 	down_write(&EXT4_I(inode)->i_data_sem);
-	ext4_discard_preallocations(inode);
+	ext4_discard_preallocations(inode, 0);
 
 	ret = ext4_es_remove_extent(inode, punch_start,
 				    EXT_MAX_BLOCKS - punch_start);
@@ -5307,7 +5307,7 @@ static int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
 		up_write(&EXT4_I(inode)->i_data_sem);
 		goto out_stop;
 	}
-	ext4_discard_preallocations(inode);
+	ext4_discard_preallocations(inode, 0);
 
 	ret = ext4_ext_shift_extents(inode, handle, punch_stop,
 				     punch_stop - punch_start, SHIFT_LEFT);
@@ -5439,7 +5439,7 @@ static int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len)
 		goto out_stop;
 
 	down_write(&EXT4_I(inode)->i_data_sem);
-	ext4_discard_preallocations(inode);
+	ext4_discard_preallocations(inode, 0);
 
 	path = ext4_find_extent(inode, offset_lblk, NULL, 0);
 	if (IS_ERR(path)) {
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 7a2720517bbb9..e608ce3fb5353 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -147,7 +147,7 @@ static int ext4_release_file(struct inode *inode, struct file *filp)
 			(atomic_read(&inode->i_writecount) == 1) &&
 			!EXT4_I(inode)->i_reserved_data_blocks) {
 		down_write(&EXT4_I(inode)->i_data_sem);
-		ext4_discard_preallocations(inode);
+		ext4_discard_preallocations(inode, 0);
 		up_write(&EXT4_I(inode)->i_data_sem);
 	}
 	if (is_dx(inode) && filp->private_data)
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index 433ca8415c5ab..80c9f33800bea 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -696,7 +696,7 @@ static int ext4_ind_trunc_restart_fn(handle_t *handle, struct inode *inode,
 	 * i_mutex. So we can safely drop the i_data_sem here.
 	 */
 	BUG_ON(EXT4_JOURNAL(inode) == NULL);
-	ext4_discard_preallocations(inode);
+	ext4_discard_preallocations(inode, 0);
 	up_write(&EXT4_I(inode)->i_data_sem);
 	*dropped = 1;
 	return 0;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 0b07576af3bf8..77543f9882580 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -383,7 +383,7 @@ void ext4_da_update_reserve_space(struct inode *inode,
 	 */
 	if ((ei->i_reserved_data_blocks == 0) &&
 	    !inode_is_open_for_write(inode))
-		ext4_discard_preallocations(inode);
+		ext4_discard_preallocations(inode, 0);
 }
 
 static int __check_block_validity(struct inode *inode, const char *func,
@@ -4055,7 +4055,7 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
 	if (stop_block > first_block) {
 
 		down_write(&EXT4_I(inode)->i_data_sem);
-		ext4_discard_preallocations(inode);
+		ext4_discard_preallocations(inode, 0);
 
 		ret = ext4_es_remove_extent(inode, first_block,
 					    stop_block - first_block);
@@ -4210,7 +4210,7 @@ int ext4_truncate(struct inode *inode)
 
 	down_write(&EXT4_I(inode)->i_data_sem);
 
-	ext4_discard_preallocations(inode);
+	ext4_discard_preallocations(inode, 0);
 
 	if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
 		err = ext4_ext_truncate(handle, inode);
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 6e70a63dcca70..36eca3bc036af 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -202,7 +202,7 @@ static long swap_inode_boot_loader(struct super_block *sb,
 	reset_inode_seed(inode);
 	reset_inode_seed(inode_bl);
 
-	ext4_discard_preallocations(inode);
+	ext4_discard_preallocations(inode, 0);
 
 	err = ext4_mark_inode_dirty(handle, inode);
 	if (err < 0) {
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 45ac6088b4ac4..132c118d12e15 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -2878,6 +2878,7 @@ int ext4_mb_init(struct super_block *sb)
 	sbi->s_mb_stats = MB_DEFAULT_STATS;
 	sbi->s_mb_stream_request = MB_DEFAULT_STREAM_THRESHOLD;
 	sbi->s_mb_order2_reqs = MB_DEFAULT_ORDER2_REQS;
+	sbi->s_mb_max_inode_prealloc = MB_DEFAULT_MAX_INODE_PREALLOC;
 	/*
 	 * The default group preallocation is 512, which for 4k block
 	 * sizes translates to 2 megabytes.  However for bigalloc file
@@ -3816,6 +3817,26 @@ void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
 	mb_debug(sb, "preallocated %d for group %u\n", preallocated, group);
 }
 
+static void ext4_mb_mark_pa_deleted(struct super_block *sb,
+				    struct ext4_prealloc_space *pa)
+{
+	struct ext4_inode_info *ei;
+
+	if (pa->pa_deleted) {
+		ext4_warning(sb, "deleted pa, type:%d, pblk:%llu, lblk:%u, len:%d\n",
+			     pa->pa_type, pa->pa_pstart, pa->pa_lstart,
+			     pa->pa_len);
+		return;
+	}
+
+	pa->pa_deleted = 1;
+
+	if (pa->pa_type == MB_INODE_PA) {
+		ei = EXT4_I(pa->pa_inode);
+		atomic_dec(&ei->i_prealloc_active);
+	}
+}
+
 static void ext4_mb_pa_callback(struct rcu_head *head)
 {
 	struct ext4_prealloc_space *pa;
@@ -3848,7 +3869,7 @@ static void ext4_mb_put_pa(struct ext4_allocation_context *ac,
 		return;
 	}
 
-	pa->pa_deleted = 1;
+	ext4_mb_mark_pa_deleted(sb, pa);
 	spin_unlock(&pa->pa_lock);
 
 	grp_blk = pa->pa_pstart;
@@ -3972,6 +3993,7 @@ ext4_mb_new_inode_pa(struct ext4_allocation_context *ac)
 	spin_lock(pa->pa_obj_lock);
 	list_add_rcu(&pa->pa_inode_list, &ei->i_prealloc_list);
 	spin_unlock(pa->pa_obj_lock);
+	atomic_inc(&ei->i_prealloc_active);
 }
 
 /*
@@ -4182,7 +4204,7 @@ ext4_mb_discard_group_preallocations(struct super_block *sb,
 		}
 
 		/* seems this one can be freed ... */
-		pa->pa_deleted = 1;
+		ext4_mb_mark_pa_deleted(sb, pa);
 
 		/* we can trust pa_free ... */
 		free += pa->pa_free;
@@ -4245,7 +4267,7 @@ ext4_mb_discard_group_preallocations(struct super_block *sb,
  *
  * FIXME!! Make sure it is valid at all the call sites
  */
-void ext4_discard_preallocations(struct inode *inode)
+void ext4_discard_preallocations(struct inode *inode, unsigned int needed)
 {
 	struct ext4_inode_info *ei = EXT4_I(inode);
 	struct super_block *sb = inode->i_sb;
@@ -4263,15 +4285,19 @@ void ext4_discard_preallocations(struct inode *inode)
 
 	mb_debug(sb, "discard preallocation for inode %lu\n",
 		 inode->i_ino);
-	trace_ext4_discard_preallocations(inode);
+	trace_ext4_discard_preallocations(inode,
+			atomic_read(&ei->i_prealloc_active), needed);
 
 	INIT_LIST_HEAD(&list);
 
+	if (needed == 0)
+		needed = UINT_MAX;
+
 repeat:
 	/* first, collect all pa's in the inode */
 	spin_lock(&ei->i_prealloc_lock);
-	while (!list_empty(&ei->i_prealloc_list)) {
-		pa = list_entry(ei->i_prealloc_list.next,
+	while (!list_empty(&ei->i_prealloc_list) && needed) {
+		pa = list_entry(ei->i_prealloc_list.prev,
 				struct ext4_prealloc_space, pa_inode_list);
 		BUG_ON(pa->pa_obj_lock != &ei->i_prealloc_lock);
 		spin_lock(&pa->pa_lock);
@@ -4288,10 +4314,11 @@ void ext4_discard_preallocations(struct inode *inode)
 
 		}
 		if (pa->pa_deleted == 0) {
-			pa->pa_deleted = 1;
+			ext4_mb_mark_pa_deleted(sb, pa);
 			spin_unlock(&pa->pa_lock);
 			list_del_rcu(&pa->pa_inode_list);
 			list_add(&pa->u.pa_tmp_list, &list);
+			needed--;
 			continue;
 		}
 
@@ -4592,7 +4619,7 @@ ext4_mb_discard_lg_preallocations(struct super_block *sb,
 		BUG_ON(pa->pa_type != MB_GROUP_PA);
 
 		/* seems this one can be freed ... */
-		pa->pa_deleted = 1;
+		ext4_mb_mark_pa_deleted(sb, pa);
 		spin_unlock(&pa->pa_lock);
 
 		list_del_rcu(&pa->pa_inode_list);
@@ -4690,11 +4717,30 @@ static void ext4_mb_add_n_trim(struct ext4_allocation_context *ac)
 	return ;
 }
 
+/*
+ * if per-inode prealloc list is too long, trim some PA
+ */
+static void ext4_mb_trim_inode_pa(struct inode *inode)
+{
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
+	int count, delta;
+
+	count = atomic_read(&ei->i_prealloc_active);
+	delta = (sbi->s_mb_max_inode_prealloc >> 2) + 1;
+	if (count > sbi->s_mb_max_inode_prealloc + delta) {
+		count -= sbi->s_mb_max_inode_prealloc;
+		ext4_discard_preallocations(inode, count);
+	}
+}
+
 /*
  * release all resource we used in allocation
  */
 static int ext4_mb_release_context(struct ext4_allocation_context *ac)
 {
+	struct inode *inode = ac->ac_inode;
+	struct ext4_inode_info *ei = EXT4_I(inode);
 	struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb);
 	struct ext4_prealloc_space *pa = ac->ac_pa;
 	if (pa) {
@@ -4720,6 +4766,17 @@ static int ext4_mb_release_context(struct ext4_allocation_context *ac)
 				ext4_mb_add_n_trim(ac);
 			}
 		}
+
+		if (pa->pa_type == MB_INODE_PA) {
+			/*
+			 * treat per-inode prealloc list as a lru list, then try
+			 * to trim the least recently used PA.
+			 */
+			spin_lock(pa->pa_obj_lock);
+			list_move(&pa->pa_inode_list, &ei->i_prealloc_list);
+			spin_unlock(pa->pa_obj_lock);
+		}
+
 		ext4_mb_put_pa(ac, ac->ac_sb, pa);
 	}
 	if (ac->ac_bitmap_page)
@@ -4729,6 +4786,7 @@ static int ext4_mb_release_context(struct ext4_allocation_context *ac)
 	if (ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC)
 		mutex_unlock(&ac->ac_lg->lg_mutex);
 	ext4_mb_collect_stats(ac);
+	ext4_mb_trim_inode_pa(inode);
 	return 0;
 }
 
diff --git a/fs/ext4/mballoc.h b/fs/ext4/mballoc.h
index 6b4d17c2935d6..e75b4749aa1c2 100644
--- a/fs/ext4/mballoc.h
+++ b/fs/ext4/mballoc.h
@@ -73,6 +73,10 @@
  */
 #define MB_DEFAULT_GROUP_PREALLOC	512
 
+/*
+ * maximum length of inode prealloc list
+ */
+#define MB_DEFAULT_MAX_INODE_PREALLOC	512
 
 struct ext4_free_data {
 	/* this links the free block information from sb_info */
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 1ed86fb6c3026..0d601b8228753 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -686,8 +686,8 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk,
 
 out:
 	if (*moved_len) {
-		ext4_discard_preallocations(orig_inode);
-		ext4_discard_preallocations(donor_inode);
+		ext4_discard_preallocations(orig_inode, 0);
+		ext4_discard_preallocations(donor_inode, 0);
 	}
 
 	ext4_ext_drop_refs(path);
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index daa94c7f7271f..13bdddc081e09 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1127,6 +1127,7 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
 	inode_set_iversion(&ei->vfs_inode, 1);
 	spin_lock_init(&ei->i_raw_lock);
 	INIT_LIST_HEAD(&ei->i_prealloc_list);
+	atomic_set(&ei->i_prealloc_active, 0);
 	spin_lock_init(&ei->i_prealloc_lock);
 	ext4_es_init_tree(&ei->i_es_tree);
 	rwlock_init(&ei->i_es_lock);
@@ -1220,7 +1221,7 @@ void ext4_clear_inode(struct inode *inode)
 {
 	invalidate_inode_buffers(inode);
 	clear_inode(inode);
-	ext4_discard_preallocations(inode);
+	ext4_discard_preallocations(inode, 0);
 	ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS);
 	dquot_drop(inode);
 	if (EXT4_I(inode)->jinode) {
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index 7fee11cc30e79..bfabb799fa451 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c
@@ -218,6 +218,7 @@ EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan);
 EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs);
 EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request);
 EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc);
+EXT4_RW_ATTR_SBI_UI(mb_max_inode_prealloc, s_mb_max_inode_prealloc);
 EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb);
 EXT4_ATTR(trigger_fs_error, 0200, trigger_test_error);
 EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval);
@@ -264,6 +265,7 @@ static struct attribute *ext4_attrs[] = {
 	ATTR_LIST(mb_order2_req),
 	ATTR_LIST(mb_stream_req),
 	ATTR_LIST(mb_group_prealloc),
+	ATTR_LIST(mb_max_inode_prealloc),
 	ATTR_LIST(max_writeback_mb_bump),
 	ATTR_LIST(extent_max_zeroout_kb),
 	ATTR_LIST(trigger_fs_error),
diff --git a/include/trace/events/ext4.h b/include/trace/events/ext4.h
index 8008d2e116b90..4c8b99ec8606d 100644
--- a/include/trace/events/ext4.h
+++ b/include/trace/events/ext4.h
@@ -746,24 +746,29 @@ TRACE_EVENT(ext4_mb_release_group_pa,
 );
 
 TRACE_EVENT(ext4_discard_preallocations,
-	TP_PROTO(struct inode *inode),
+	TP_PROTO(struct inode *inode, unsigned int len, unsigned int needed),
 
-	TP_ARGS(inode),
+	TP_ARGS(inode, len, needed),
 
 	TP_STRUCT__entry(
-		__field(	dev_t,	dev			)
-		__field(	ino_t,	ino			)
+		__field(	dev_t,		dev		)
+		__field(	ino_t,		ino		)
+		__field(	unsigned int,	len		)
+		__field(	unsigned int,	needed		)
 
 	),
 
 	TP_fast_assign(
 		__entry->dev	= inode->i_sb->s_dev;
 		__entry->ino	= inode->i_ino;
+		__entry->len	= len;
+		__entry->needed	= needed;
 	),
 
-	TP_printk("dev %d,%d ino %lu",
+	TP_printk("dev %d,%d ino %lu len: %u needed %u",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
-		  (unsigned long) __entry->ino)
+		  (unsigned long) __entry->ino, __entry->len,
+		  __entry->needed)
 );
 
 TRACE_EVENT(ext4_mb_discard_preallocations,
-- 
GitLab


From c965d6402f24adcd3d4d0dd9b1f30a0578b6255c Mon Sep 17 00:00:00 2001
From: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Date: Tue, 28 Jul 2020 20:25:41 +0900
Subject: [PATCH 0314/1341] btrfs: handle errors from async submission

Btrfs' async submit mechanism is able to handle errors in the submission
path and the meta-data async submit function correctly passes the error
code to the caller.

In btrfs_submit_bio_start() and btrfs_submit_bio_start_direct_io() we're
not handling the errors returned by btrfs_csum_one_bio() correctly though
and simply call BUG_ON(). This is unnecessary as the caller of these two
functions - run_one_async_start - correctly checks for the return values
and sets the status of the async_submit_bio. The actual bio submission
will be handled later on by run_one_async_done only if
async_submit_bio::status is 0, so the data won't be written if we
encountered an error in the checksum process.

Simply return the error from btrfs_csum_one_bio() to the async submitters,
like it's done in btree_submit_bio_start().

Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/inode.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 16ce82039dcf1..4ad0323b36845 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2160,11 +2160,8 @@ static blk_status_t btrfs_submit_bio_start(void *private_data, struct bio *bio,
 				    u64 bio_offset)
 {
 	struct inode *inode = private_data;
-	blk_status_t ret = 0;
 
-	ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, 0, 0);
-	BUG_ON(ret); /* -ENOMEM */
-	return 0;
+	return btrfs_csum_one_bio(BTRFS_I(inode), bio, 0, 0);
 }
 
 /*
@@ -7618,10 +7615,8 @@ static blk_status_t btrfs_submit_bio_start_direct_io(void *private_data,
 				    struct bio *bio, u64 offset)
 {
 	struct inode *inode = private_data;
-	blk_status_t ret;
-	ret = btrfs_csum_one_bio(BTRFS_I(inode), bio, offset, 1);
-	BUG_ON(ret); /* -ENOMEM */
-	return 0;
+
+	return btrfs_csum_one_bio(BTRFS_I(inode), bio, offset, 1);
 }
 
 static void btrfs_end_dio_bio(struct bio *bio)
-- 
GitLab


From 282dd7d7718444679b046b769d872b188818ca35 Mon Sep 17 00:00:00 2001
From: Marcos Paulo de Souza <mpdesouza@suse.com>
Date: Mon, 3 Aug 2020 16:55:01 -0300
Subject: [PATCH 0315/1341] btrfs: reset compression level for lzo on remount

Currently a user can set mount "-o compress" which will set the
compression algorithm to zlib, and use the default compress level for
zlib (3):

  relatime,compress=zlib:3,space_cache

If the user remounts the fs using "-o compress=lzo", then the old
compress_level is used:

  relatime,compress=lzo:3,space_cache

But lzo does not expose any tunable compression level. The same happens
if we set any compress argument with different level, also with zstd.

Fix this by resetting the compress_level when compress=lzo is
specified.  With the fix applied, lzo is shown without compress level:

  relatime,compress=lzo,space_cache

CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/super.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index e529ddb35b87f..25967ecaaf0af 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -625,6 +625,7 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
 			} else if (strncmp(args[0].from, "lzo", 3) == 0) {
 				compress_type = "lzo";
 				info->compress_type = BTRFS_COMPRESS_LZO;
+				info->compress_level = 0;
 				btrfs_set_opt(info->mount_opt, COMPRESS);
 				btrfs_clear_opt(info->mount_opt, NODATACOW);
 				btrfs_clear_opt(info->mount_opt, NODATASUM);
-- 
GitLab


From 604997b4a3803f33e70799b2696bd3dbfed7276c Mon Sep 17 00:00:00 2001
From: David Sterba <dsterba@suse.com>
Date: Mon, 27 Jul 2020 17:38:19 +0200
Subject: [PATCH 0316/1341] btrfs: use the correct const function attribute for
 btrfs_get_num_csums

The build robot reports

compiler: h8300-linux-gcc (GCC) 9.3.0
   In file included from fs/btrfs/tests/extent-map-tests.c:8:
>> fs/btrfs/tests/../ctree.h:2166:8: warning: type qualifiers ignored on function return type [-Wignored-qualifiers]
    2166 | size_t __const btrfs_get_num_csums(void);
         |        ^~~~~~~

The function attribute for const does not follow the expected scheme and
in this case is confused with a const type qualifier.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/ctree.c | 2 +-
 fs/btrfs/ctree.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 70e49d8d4f6c3..cd1cd673bc0bf 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -68,7 +68,7 @@ const char *btrfs_super_csum_driver(u16 csum_type)
 		btrfs_csums[csum_type].name;
 }
 
-size_t __const btrfs_get_num_csums(void)
+size_t __attribute_const__ btrfs_get_num_csums(void)
 {
 	return ARRAY_SIZE(btrfs_csums);
 }
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 9c7e466f27a9a..729b5b80014ab 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2262,7 +2262,7 @@ BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
 int btrfs_super_csum_size(const struct btrfs_super_block *s);
 const char *btrfs_super_csum_name(u16 csum_type);
 const char *btrfs_super_csum_driver(u16 csum_type);
-size_t __const btrfs_get_num_csums(void);
+size_t __attribute_const__ btrfs_get_num_csums(void);
 
 
 /*
-- 
GitLab


From bbc37d6e475eee8ffa2156ec813efc6bbb43c06d Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@suse.com>
Date: Fri, 14 Aug 2020 11:04:09 +0100
Subject: [PATCH 0317/1341] btrfs: fix space cache memory leak after
 transaction abort

If a transaction aborts it can cause a memory leak of the pages array of
a block group's io_ctl structure. The following steps explain how that can
happen:

1) Transaction N is committing, currently in state TRANS_STATE_UNBLOCKED
   and it's about to start writing out dirty extent buffers;

2) Transaction N + 1 already started and another task, task A, just called
   btrfs_commit_transaction() on it;

3) Block group B was dirtied (extents allocated from it) by transaction
   N + 1, so when task A calls btrfs_start_dirty_block_groups(), at the
   very beginning of the transaction commit, it starts writeback for the
   block group's space cache by calling btrfs_write_out_cache(), which
   allocates the pages array for the block group's io_ctl with a call to
   io_ctl_init(). Block group A is added to the io_list of transaction
   N + 1 by btrfs_start_dirty_block_groups();

4) While transaction N's commit is writing out the extent buffers, it gets
   an IO error and aborts transaction N, also setting the file system to
   RO mode;

5) Task A has already returned from btrfs_start_dirty_block_groups(), is at
   btrfs_commit_transaction() and has set transaction N + 1 state to
   TRANS_STATE_COMMIT_START. Immediately after that it checks that the
   filesystem was turned to RO mode, due to transaction N's abort, and
   jumps to the "cleanup_transaction" label. After that we end up at
   btrfs_cleanup_one_transaction() which calls btrfs_cleanup_dirty_bgs().
   That helper finds block group B in the transaction's io_list but it
   never releases the pages array of the block group's io_ctl, resulting in
   a memory leak.

In fact at the point when we are at btrfs_cleanup_dirty_bgs(), the pages
array points to pages that were already released by us at
__btrfs_write_out_cache() through the call to io_ctl_drop_pages(). We end
up freeing the pages array only after waiting for the ordered extent to
complete through btrfs_wait_cache_io(), which calls io_ctl_free() to do
that. But in the transaction abort case we don't wait for the space cache's
ordered extent to complete through a call to btrfs_wait_cache_io(), so
that's why we end up with a memory leak - we wait for the ordered extent
to complete indirectly by shutting down the work queues and waiting for
any jobs in them to complete before returning from close_ctree().

We can solve the leak simply by freeing the pages array right after
releasing the pages (with the call to io_ctl_drop_pages()) at
__btrfs_write_out_cache(), since we will never use it anymore after that
and the pages array points to already released pages at that point, which
is currently not a problem since no one will use it after that, but not a
good practice anyway since it can easily lead to use-after-free issues.

So fix this by freeing the pages array right after releasing the pages at
__btrfs_write_out_cache().

This issue can often be reproduced with test case generic/475 from fstests
and kmemleak can detect it and reports it with the following trace:

unreferenced object 0xffff9bbf009fa600 (size 512):
  comm "fsstress", pid 38807, jiffies 4298504428 (age 22.028s)
  hex dump (first 32 bytes):
    00 a0 7c 4d 3d ed ff ff 40 a0 7c 4d 3d ed ff ff  ..|M=...@.|M=...
    80 a0 7c 4d 3d ed ff ff c0 a0 7c 4d 3d ed ff ff  ..|M=.....|M=...
  backtrace:
    [<00000000f4b5cfe2>] __kmalloc+0x1a8/0x3e0
    [<0000000028665e7f>] io_ctl_init+0xa7/0x120 [btrfs]
    [<00000000a1f95b2d>] __btrfs_write_out_cache+0x86/0x4a0 [btrfs]
    [<00000000207ea1b0>] btrfs_write_out_cache+0x7f/0xf0 [btrfs]
    [<00000000af21f534>] btrfs_start_dirty_block_groups+0x27b/0x580 [btrfs]
    [<00000000c3c23d44>] btrfs_commit_transaction+0xa6f/0xe70 [btrfs]
    [<000000009588930c>] create_subvol+0x581/0x9a0 [btrfs]
    [<000000009ef2fd7f>] btrfs_mksubvol+0x3fb/0x4a0 [btrfs]
    [<00000000474e5187>] __btrfs_ioctl_snap_create+0x119/0x1a0 [btrfs]
    [<00000000708ee349>] btrfs_ioctl_snap_create_v2+0xb0/0xf0 [btrfs]
    [<00000000ea60106f>] btrfs_ioctl+0x12c/0x3130 [btrfs]
    [<000000005c923d6d>] __x64_sys_ioctl+0x83/0xb0
    [<0000000043ace2c9>] do_syscall_64+0x33/0x80
    [<00000000904efbce>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

CC: stable@vger.kernel.org # 4.9+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/disk-io.c          | 1 +
 fs/btrfs/free-space-cache.c | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index c850d7f44fbe8..465bc8372e099 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -4574,6 +4574,7 @@ static void btrfs_cleanup_bg_io(struct btrfs_block_group *cache)
 		cache->io_ctl.inode = NULL;
 		iput(inode);
 	}
+	ASSERT(cache->io_ctl.pages == NULL);
 	btrfs_put_block_group(cache);
 }
 
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index ef0fd7afb0b1e..dc82fd0c80cbb 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -1186,7 +1186,6 @@ static int __btrfs_wait_cache_io(struct btrfs_root *root,
 	ret = update_cache_item(trans, root, inode, path, offset,
 				io_ctl->entries, io_ctl->bitmaps);
 out:
-	io_ctl_free(io_ctl);
 	if (ret) {
 		invalidate_inode_pages2(inode->i_mapping);
 		BTRFS_I(inode)->generation = 0;
@@ -1347,6 +1346,7 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
 	 * them out later
 	 */
 	io_ctl_drop_pages(io_ctl);
+	io_ctl_free(io_ctl);
 
 	unlock_extent_cached(&BTRFS_I(inode)->io_tree, 0,
 			     i_size_read(inode) - 1, &cached_state);
-- 
GitLab


From fc666777da9da387354b1a142a6ffc5d43bc4f7e Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Wed, 19 Aug 2020 11:10:51 -0600
Subject: [PATCH 0318/1341] io_uring: use system_unbound_wq for ring exit work

We currently use system_wq, which is unbounded in terms of number of
workers. This means that if we're exiting tons of rings at the same
time, then we'll briefly spawn tons of event kworkers just for a very
short blocking time as the rings exit.

Use system_unbound_wq instead, which has a sane cap on the concurrency
level.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index e325895d681bf..1f2f31d93686f 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7960,7 +7960,13 @@ static void io_ring_ctx_wait_and_kill(struct io_ring_ctx *ctx)
 			 ACCT_LOCKED);
 
 	INIT_WORK(&ctx->exit_work, io_ring_exit_work);
-	queue_work(system_wq, &ctx->exit_work);
+	/*
+	 * Use system_unbound_wq to avoid spawning tons of event kworkers
+	 * if we're exiting a ton of rings at the same time. It just adds
+	 * noise and overhead, there's no discernable change in runtime
+	 * over using system_wq.
+	 */
+	queue_work(system_unbound_wq, &ctx->exit_work);
 }
 
 static int io_uring_release(struct inode *inode, struct file *file)
-- 
GitLab


From ad112aa8b1ac4bf5e8da67734fcb535fd3cd564e Mon Sep 17 00:00:00 2001
From: Wang Hai <wanghai38@huawei.com>
Date: Wed, 19 Aug 2020 10:49:43 +0800
Subject: [PATCH 0319/1341] SUNRPC: remove duplicate include

Remove linux/sunrpc/auth_gss.h which is included more than once

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 net/sunrpc/auth_gss/trace.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/sunrpc/auth_gss/trace.c b/net/sunrpc/auth_gss/trace.c
index d26036a574432..76685abba60fe 100644
--- a/net/sunrpc/auth_gss/trace.c
+++ b/net/sunrpc/auth_gss/trace.c
@@ -9,7 +9,6 @@
 #include <linux/sunrpc/svc_xprt.h>
 #include <linux/sunrpc/auth_gss.h>
 #include <linux/sunrpc/gss_err.h>
-#include <linux/sunrpc/auth_gss.h>
 
 #define CREATE_TRACE_POINTS
 #include <trace/events/rpcgss.h>
-- 
GitLab


From 394b19d6cb58ae292c0e1ad6b893fed8ece477ce Mon Sep 17 00:00:00 2001
From: Arvind Sankar <nivedita@alum.mit.edu>
Date: Tue, 4 Aug 2020 19:48:17 -0400
Subject: [PATCH 0320/1341] x86/boot/compressed: Use builtin mem functions for
 decompressor

Since commits

  c041b5ad8640 ("x86, boot: Create a separate string.h file to provide standard string functions")
  fb4cac573ef6 ("x86, boot: Move memcmp() into string.h and string.c")

the decompressor stub has been using the compiler's builtin memcpy,
memset and memcmp functions, _except_ where it would likely have the
largest impact, in the decompression code itself.

Remove the #undef's of memcpy and memset in misc.c so that the
decompressor code also uses the compiler builtins.

The rationale given in the comment doesn't really apply: just because
some functions use the out-of-line version is no reason to not use the
builtin version in the rest.

Replace the comment with an explanation of why memzero and memmove are
being #define'd.

Drop the suggestion to #undef in boot/string.h as well: the out-of-line
versions are not really optimized versions, they're generic code that's
good enough for the preboot environment. The compiler will likely
generate better code for constant-size memcpy/memset/memcmp if it is
allowed to.

Most decompressors' performance is unchanged, with the exception of LZ4
and 64-bit ZSTD.

	Before	After ARCH
LZ4	  73ms	 10ms   32
LZ4	 120ms	 10ms	64
ZSTD	  90ms	 74ms	64

Measurements on QEMU on 2.2GHz Broadwell Xeon, using defconfig kernels.

Decompressor code size has small differences, with the largest being
that 64-bit ZSTD decreases just over 2k. The largest code size increase
was on 64-bit XZ, of about 400 bytes.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Suggested-by: Nick Terrell <nickrterrell@gmail.com>
Tested-by: Nick Terrell <nickrterrell@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/x86/boot/compressed/misc.c | 7 ++-----
 arch/x86/boot/string.h          | 5 +----
 2 files changed, 3 insertions(+), 9 deletions(-)

diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index 39e592d0e0b41..e478e40fbe5a9 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -30,12 +30,9 @@
 #define STATIC		static
 
 /*
- * Use normal definitions of mem*() from string.c. There are already
- * included header files which expect a definition of memset() and by
- * the time we define memset macro, it is too late.
+ * Provide definitions of memzero and memmove as some of the decompressors will
+ * try to define their own functions if these are not defined as macros.
  */
-#undef memcpy
-#undef memset
 #define memzero(s, n)	memset((s), 0, (n))
 #define memmove		memmove
 
diff --git a/arch/x86/boot/string.h b/arch/x86/boot/string.h
index 995f7b7ad512e..a232da487cd20 100644
--- a/arch/x86/boot/string.h
+++ b/arch/x86/boot/string.h
@@ -11,10 +11,7 @@ void *memcpy(void *dst, const void *src, size_t len);
 void *memset(void *dst, int c, size_t len);
 int memcmp(const void *s1, const void *s2, size_t len);
 
-/*
- * Access builtin version by default. If one needs to use optimized version,
- * do "undef memcpy" in .c file and link against right string.c
- */
+/* Access builtin version by default. */
 #define memcpy(d,s,l) __builtin_memcpy(d,s,l)
 #define memset(d,c,l) __builtin_memset(d,c,l)
 #define memcmp	__builtin_memcmp
-- 
GitLab


From 33d0f96ffd7394ffb208bb366be312d12dfd24a4 Mon Sep 17 00:00:00 2001
From: Arvind Sankar <nivedita@alum.mit.edu>
Date: Wed, 19 Aug 2020 10:08:16 -0400
Subject: [PATCH 0321/1341] lib/string.c: Use freestanding environment

gcc can transform the loop in a naive implementation of memset/memcpy
etc into a call to the function itself.  This optimization is enabled by
-ftree-loop-distribute-patterns.

This has been the case for a while, but gcc-10.x enables this option at
-O2 rather than -O3 as in previous versions.

Add -ffreestanding, which implicitly disables this optimization with
gcc.  It is unclear whether clang performs such optimizations, but
hopefully it will also not do so in a freestanding environment.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56888
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 lib/Makefile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/Makefile b/lib/Makefile
index e290fc5707ea6..a4a4c6864f518 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -15,11 +15,16 @@ KCOV_INSTRUMENT_debugobjects.o := n
 KCOV_INSTRUMENT_dynamic_debug.o := n
 KCOV_INSTRUMENT_fault-inject.o := n
 
+# string.o implements standard library functions like memset/memcpy etc.
+# Use -ffreestanding to ensure that the compiler does not try to "optimize"
+# them into calls to themselves.
+CFLAGS_string.o := -ffreestanding
+
 # Early boot use of cmdline, don't instrument it
 ifdef CONFIG_AMD_MEM_ENCRYPT
 KASAN_SANITIZE_string.o := n
 
-CFLAGS_string.o := -fno-stack-protector
+CFLAGS_string.o += -fno-stack-protector
 endif
 
 # Used by KCSAN while enabled, avoid recursion.
-- 
GitLab


From 43647929175e2cd30a6a1b1a5d385704bbf934a3 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Wed, 19 Aug 2020 14:48:50 +0200
Subject: [PATCH 0322/1341] dt: writing-schema: Miscellaneous grammar fixes

  - Add missing verb,
  - Fix accidental plural.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200819124850.20543-1-geert+renesas@glider.be
---
 Documentation/devicetree/writing-schema.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/writing-schema.rst b/Documentation/devicetree/writing-schema.rst
index 8c74a99f95e23..16f21e182ff6d 100644
--- a/Documentation/devicetree/writing-schema.rst
+++ b/Documentation/devicetree/writing-schema.rst
@@ -5,7 +5,7 @@ Writing DeviceTree Bindings in json-schema
 
 Devicetree bindings are written using json-schema vocabulary. Schema files are
 written in a JSON compatible subset of YAML. YAML is used instead of JSON as it
-considered more human readable and has some advantages such as allowing
+is considered more human readable and has some advantages such as allowing
 comments (Prefixed with '#').
 
 Schema Contents
@@ -19,7 +19,7 @@ $id
   A json-schema unique identifier string. The string must be a valid
   URI typically containing the binding's filename and path. For DT schema, it must
   begin with "http://devicetree.org/schemas/". The URL is used in constructing
-  references to other files specified in schema "$ref" properties. A $ref values
+  references to other files specified in schema "$ref" properties. A $ref value
   with a leading '/' will have the hostname prepended. A $ref value a relative
   path or filename only will be prepended with the hostname and path components
   of the current schema file's '$id' value. A URL is used even for local files,
-- 
GitLab


From d1ac0002dd297069bb8448c2764c9c31c4668441 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Wed, 19 Aug 2020 10:42:55 +0100
Subject: [PATCH 0323/1341] of: address: Work around missing device_type
 property in pcie nodes

Recent changes to the DT PCI bus parsing made it mandatory for
device tree nodes describing a PCI controller to have the
'device_type = "pci"' property for the node to be matched.

Although this follows the letter of the specification, it
breaks existing device-trees that have been working fine
for years.  Rockchip rk3399-based systems are a prime example
of such collateral damage, and have stopped discovering their
PCI bus.

In order to paper over it, let's add a workaround to the code
matching the device type, and accept as PCI any node that is
named "pcie",

A warning will hopefully nudge the user into updating their
DT to a fixed version if they can, but the incentive is
obviously pretty small.

Fixes: 2f96593ecc37 ("of_address: Add bus type match for pci ranges parser")
Suggested-by: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200819094255.474565-1-maz@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/of/address.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/of/address.c b/drivers/of/address.c
index 945b3d785f440..da4f7341323f2 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -128,15 +128,29 @@ static unsigned int of_bus_pci_get_flags(const __be32 *addr)
  * PCI bus specific translator
  */
 
+static bool of_node_is_pcie(struct device_node *np)
+{
+	bool is_pcie = of_node_name_eq(np, "pcie");
+
+	if (is_pcie)
+		pr_warn_once("%pOF: Missing device_type\n", np);
+
+	return is_pcie;
+}
+
 static int of_bus_pci_match(struct device_node *np)
 {
 	/*
  	 * "pciex" is PCI Express
 	 * "vci" is for the /chaos bridge on 1st-gen PCI powermacs
 	 * "ht" is hypertransport
+	 *
+	 * If none of the device_type match, and that the node name is
+	 * "pcie", accept the device as PCI (with a warning).
 	 */
 	return of_node_is_type(np, "pci") || of_node_is_type(np, "pciex") ||
-		of_node_is_type(np, "vci") || of_node_is_type(np, "ht");
+		of_node_is_type(np, "vci") || of_node_is_type(np, "ht") ||
+		of_node_is_pcie(np);
 }
 
 static void of_bus_pci_count_cells(struct device_node *np,
-- 
GitLab


From 63d4a4c145cca2e84dc6e62d2ef5cb990c9723c2 Mon Sep 17 00:00:00 2001
From: Shay Agroskin <shayagr@amazon.com>
Date: Wed, 19 Aug 2020 20:28:36 +0300
Subject: [PATCH 0324/1341] net: ena: Prevent reset after device destruction

The reset work is scheduled by the timer routine whenever it
detects that a device reset is required (e.g. when a keep_alive signal
is missing).
When releasing device resources in ena_destroy_device() the driver
cancels the scheduling of the timer routine without destroying the reset
work explicitly.

This creates the following bug:
    The driver is suspended and the ena_suspend() function is called
	-> This function calls ena_destroy_device() to free the net device
	   resources
	    -> The driver waits for the timer routine to finish
	    its execution and then cancels it, thus preventing from it
	    to be called again.

    If, in its final execution, the timer routine schedules a reset,
    the reset routine might be called afterwards,and a redundant call to
    ena_restore_device() would be made.

By changing the reset routine we allow it to read the device's state
accurately.
This is achieved by checking whether ENA_FLAG_TRIGGER_RESET flag is set
before resetting the device and making both the destruction function and
the flag check are under rtnl lock.
The ENA_FLAG_TRIGGER_RESET is cleared at the end of the destruction
routine. Also surround the flag check with 'likely' because
we expect that the reset routine would be called only when
ENA_FLAG_TRIGGER_RESET flag is set.

The destruction of the timer and reset services in __ena_shutoff() have to
stay, even though the timer routine is destroyed in ena_destroy_device().
This is to avoid a case in which the reset routine is scheduled after
free_netdev() in __ena_shutoff(), which would create an access to freed
memory in adapter->flags.

Fixes: 8c5c7abdeb2d ("net: ena: add power management ops to the ENA driver")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 2a6c9725e0922..44aeace196f07 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -3601,16 +3601,14 @@ static void ena_fw_reset_device(struct work_struct *work)
 {
 	struct ena_adapter *adapter =
 		container_of(work, struct ena_adapter, reset_task);
-	struct pci_dev *pdev = adapter->pdev;
 
-	if (unlikely(!test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
-		dev_err(&pdev->dev,
-			"device reset schedule while reset bit is off\n");
-		return;
-	}
 	rtnl_lock();
-	ena_destroy_device(adapter, false);
-	ena_restore_device(adapter);
+
+	if (likely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
+		ena_destroy_device(adapter, false);
+		ena_restore_device(adapter);
+	}
+
 	rtnl_unlock();
 }
 
@@ -4389,8 +4387,11 @@ static void __ena_shutoff(struct pci_dev *pdev, bool shutdown)
 		netdev->rx_cpu_rmap = NULL;
 	}
 #endif /* CONFIG_RFS_ACCEL */
-	del_timer_sync(&adapter->timer_service);
 
+	/* Make sure timer and reset routine won't be called after
+	 * freeing device resources.
+	 */
+	del_timer_sync(&adapter->timer_service);
 	cancel_work_sync(&adapter->reset_task);
 
 	rtnl_lock(); /* lock released inside the below if-else block */
-- 
GitLab


From 8b147f6f3e7de4e51113e3e9ec44aa2debc02c58 Mon Sep 17 00:00:00 2001
From: Shay Agroskin <shayagr@amazon.com>
Date: Wed, 19 Aug 2020 20:28:37 +0300
Subject: [PATCH 0325/1341] net: ena: Change WARN_ON expression in
 ena_del_napi_in_range()

The ena_del_napi_in_range() function unregisters the napi handler for
rings in a given range.
This function had the following WARN_ON macro:

    WARN_ON(ENA_IS_XDP_INDEX(adapter, i) &&
	    adapter->ena_napi[i].xdp_ring);

This macro prints the call stack if the expression inside of it is
true [1], but the expression inside of it is the wanted situation.
The expression checks whether the ring has an XDP queue and its index
corresponds to a XDP one.

This patch changes the expression to
    !ENA_IS_XDP_INDEX(adapter, i) && adapter->ena_napi[i].xdp_ring
which indicates an unwanted situation.

Also, change the structure of the function. The napi handler is
unregistered for all rings, and so there's no need to check whether the
index is an XDP index or not. By removing this check the code becomes
much more readable.

Fixes: 548c4940b9f1 ("net: ena: Implement XDP_TX action")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 44aeace196f07..233db15c970d6 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -2180,13 +2180,10 @@ static void ena_del_napi_in_range(struct ena_adapter *adapter,
 	int i;
 
 	for (i = first_index; i < first_index + count; i++) {
-		/* Check if napi was initialized before */
-		if (!ENA_IS_XDP_INDEX(adapter, i) ||
-		    adapter->ena_napi[i].xdp_ring)
-			netif_napi_del(&adapter->ena_napi[i].napi);
-		else
-			WARN_ON(ENA_IS_XDP_INDEX(adapter, i) &&
-				adapter->ena_napi[i].xdp_ring);
+		netif_napi_del(&adapter->ena_napi[i].napi);
+
+		WARN_ON(!ENA_IS_XDP_INDEX(adapter, i) &&
+			adapter->ena_napi[i].xdp_ring);
 	}
 }
 
-- 
GitLab


From ccd143e5150f24b9ba15145c7221b61dd9e41021 Mon Sep 17 00:00:00 2001
From: Shay Agroskin <shayagr@amazon.com>
Date: Wed, 19 Aug 2020 20:28:38 +0300
Subject: [PATCH 0326/1341] net: ena: Make missed_tx stat incremental

Most statistics in ena driver are incremented, meaning that a stat's
value is a sum of all increases done to it since driver/queue
initialization.

This patch makes all statistics this way, effectively making missed_tx
statistic incremental.
Also added a comment regarding rx_drops and tx_drops to make it
clearer how these counters are calculated.

Fixes: 11095fdb712b ("net: ena: add statistics for missed tx packets")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amazon/ena/ena_netdev.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/amazon/ena/ena_netdev.c b/drivers/net/ethernet/amazon/ena/ena_netdev.c
index 233db15c970d6..a3a8edf9a734d 100644
--- a/drivers/net/ethernet/amazon/ena/ena_netdev.c
+++ b/drivers/net/ethernet/amazon/ena/ena_netdev.c
@@ -3687,7 +3687,7 @@ static int check_missing_comp_in_tx_queue(struct ena_adapter *adapter,
 	}
 
 	u64_stats_update_begin(&tx_ring->syncp);
-	tx_ring->tx_stats.missed_tx = missed_tx;
+	tx_ring->tx_stats.missed_tx += missed_tx;
 	u64_stats_update_end(&tx_ring->syncp);
 
 	return rc;
@@ -4556,6 +4556,9 @@ static void ena_keep_alive_wd(void *adapter_data,
 	tx_drops = ((u64)desc->tx_drops_high << 32) | desc->tx_drops_low;
 
 	u64_stats_update_begin(&adapter->syncp);
+	/* These stats are accumulated by the device, so the counters indicate
+	 * all drops since last reset.
+	 */
 	adapter->dev_stats.rx_drops = rx_drops;
 	adapter->dev_stats.tx_drops = tx_drops;
 	u64_stats_update_end(&adapter->syncp);
-- 
GitLab


From d1fb55592909ea249af70170c7a52e637009564d Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 19 Aug 2020 21:52:38 +0200
Subject: [PATCH 0327/1341] netlink: fix state reallocation in policy export

Evidently, when I did this previously, we didn't have more than
10 policies and didn't run into the reallocation path, because
it's missing a memset() for the unused policies. Fix that.

Fixes: d07dcf9aadd6 ("netlink: add infrastructure to expose policies to userspace")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/netlink/policy.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/netlink/policy.c b/net/netlink/policy.c
index f6491853c7971..2b3e26f7496f5 100644
--- a/net/netlink/policy.c
+++ b/net/netlink/policy.c
@@ -51,6 +51,9 @@ static int add_policy(struct nl_policy_dump **statep,
 	if (!state)
 		return -ENOMEM;
 
+	memset(&state->policies[state->n_alloc], 0,
+	       flex_array_size(state, policies, n_alloc - state->n_alloc));
+
 	state->policies[state->n_alloc].policy = policy;
 	state->policies[state->n_alloc].maxtype = maxtype;
 	state->n_alloc = n_alloc;
-- 
GitLab


From 957ff4278e0db34f56c2bc121fdd6393e4523ef2 Mon Sep 17 00:00:00 2001
From: Min Li <min.li.xe@renesas.com>
Date: Tue, 18 Aug 2020 10:41:22 -0400
Subject: [PATCH 0328/1341] ptp: ptp_clockmatrix: use i2c_master_send for i2c
 write

The old code for i2c write would break on some controllers, which fails
at handling Repeated Start Condition. So we will just use i2c_master_send
to handle write in one transanction.

Changes since v1:
- Remove indentation change

Signed-off-by: Min Li <min.li.xe@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/ptp/ptp_clockmatrix.c | 56 +++++++++++++++++++++++++++--------
 drivers/ptp/ptp_clockmatrix.h |  2 ++
 2 files changed, 45 insertions(+), 13 deletions(-)

diff --git a/drivers/ptp/ptp_clockmatrix.c b/drivers/ptp/ptp_clockmatrix.c
index 73aaae5574ed5..e020faff7da53 100644
--- a/drivers/ptp/ptp_clockmatrix.c
+++ b/drivers/ptp/ptp_clockmatrix.c
@@ -142,16 +142,15 @@ static int idtcm_strverscmp(const char *ver1, const char *ver2)
 	return result;
 }
 
-static int idtcm_xfer(struct idtcm *idtcm,
-		      u8 regaddr,
-		      u8 *buf,
-		      u16 count,
-		      bool write)
+static int idtcm_xfer_read(struct idtcm *idtcm,
+			   u8 regaddr,
+			   u8 *buf,
+			   u16 count)
 {
 	struct i2c_client *client = idtcm->client;
 	struct i2c_msg msg[2];
 	int cnt;
-	char *fmt = "i2c_transfer failed at %d in %s for %s, at addr: %04X!\n";
+	char *fmt = "i2c_transfer failed at %d in %s, at addr: %04X!\n";
 
 	msg[0].addr = client->addr;
 	msg[0].flags = 0;
@@ -159,7 +158,7 @@ static int idtcm_xfer(struct idtcm *idtcm,
 	msg[0].buf = &regaddr;
 
 	msg[1].addr = client->addr;
-	msg[1].flags = write ? 0 : I2C_M_RD;
+	msg[1].flags = I2C_M_RD;
 	msg[1].len = count;
 	msg[1].buf = buf;
 
@@ -170,7 +169,6 @@ static int idtcm_xfer(struct idtcm *idtcm,
 			fmt,
 			__LINE__,
 			__func__,
-			write ? "write" : "read",
 			regaddr);
 		return cnt;
 	} else if (cnt != 2) {
@@ -182,6 +180,37 @@ static int idtcm_xfer(struct idtcm *idtcm,
 	return 0;
 }
 
+static int idtcm_xfer_write(struct idtcm *idtcm,
+			    u8 regaddr,
+			    u8 *buf,
+			    u16 count)
+{
+	struct i2c_client *client = idtcm->client;
+	/* we add 1 byte for device register */
+	u8 msg[IDTCM_MAX_WRITE_COUNT + 1];
+	int cnt;
+	char *fmt = "i2c_master_send failed at %d in %s, at addr: %04X!\n";
+
+	if (count > IDTCM_MAX_WRITE_COUNT)
+		return -EINVAL;
+
+	msg[0] = regaddr;
+	memcpy(&msg[1], buf, count);
+
+	cnt = i2c_master_send(client, msg, count + 1);
+
+	if (cnt < 0) {
+		dev_err(&client->dev,
+			fmt,
+			__LINE__,
+			__func__,
+			regaddr);
+		return cnt;
+	}
+
+	return 0;
+}
+
 static int idtcm_page_offset(struct idtcm *idtcm, u8 val)
 {
 	u8 buf[4];
@@ -195,7 +224,7 @@ static int idtcm_page_offset(struct idtcm *idtcm, u8 val)
 	buf[2] = 0x10;
 	buf[3] = 0x20;
 
-	err = idtcm_xfer(idtcm, PAGE_ADDR, buf, sizeof(buf), 1);
+	err = idtcm_xfer_write(idtcm, PAGE_ADDR, buf, sizeof(buf));
 
 	if (err) {
 		idtcm->page_offset = 0xff;
@@ -223,11 +252,12 @@ static int _idtcm_rdwr(struct idtcm *idtcm,
 	err = idtcm_page_offset(idtcm, hi);
 
 	if (err)
-		goto out;
+		return err;
 
-	err = idtcm_xfer(idtcm, lo, buf, count, write);
-out:
-	return err;
+	if (write)
+		return idtcm_xfer_write(idtcm, lo, buf, count);
+
+	return idtcm_xfer_read(idtcm, lo, buf, count);
 }
 
 static int idtcm_read(struct idtcm *idtcm,
diff --git a/drivers/ptp/ptp_clockmatrix.h b/drivers/ptp/ptp_clockmatrix.h
index ffae56c5d97fa..82840d72364ad 100644
--- a/drivers/ptp/ptp_clockmatrix.h
+++ b/drivers/ptp/ptp_clockmatrix.h
@@ -55,6 +55,8 @@
 
 #define PEROUT_ENABLE_OUTPUT_MASK		(0xdeadbeef)
 
+#define IDTCM_MAX_WRITE_COUNT			(512)
+
 /* Values of DPLL_N.DPLL_MODE.PLL_MODE */
 enum pll_mode {
 	PLL_MODE_MIN = 0,
-- 
GitLab


From 9553b62c1dd27df67ab2f52ec8a3bc3501887619 Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue, 18 Aug 2020 18:14:39 +0200
Subject: [PATCH 0329/1341] net: atlantic: Use readx_poll_timeout() for large
 timeout

Commit
   8dcf2ad39fdb2 ("net: atlantic: add hwmon getter for MAC temperature")

implemented a read callback with an udelay(10000U). This fails to
compile on ARM because the delay is >1ms. I doubt that it is needed to
spin for 10ms even if possible on x86.

>From looking at the code, the context appears to be preemptible so using
usleep() should work and avoid busy spinning.

Use readx_poll_timeout() in the poll loop.

Fixes: 8dcf2ad39fdb2 ("net: atlantic: add hwmon getter for MAC temperature")
Cc: Mark Starovoytov <mstarovoitov@marvell.com>
Cc: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
index 16a944707ba90..8941ac4df9e37 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
@@ -1631,8 +1631,8 @@ static int hw_atl_b0_get_mac_temp(struct aq_hw_s *self, u32 *temp)
 		hw_atl_ts_reset_set(self, 0);
 	}
 
-	err = readx_poll_timeout_atomic(hw_atl_b0_ts_ready_and_latch_high_get,
-					self, val, val == 1, 10000U, 500000U);
+	err = readx_poll_timeout(hw_atl_b0_ts_ready_and_latch_high_get, self,
+				 val, val == 1, 10000U, 500000U);
 	if (err)
 		return err;
 
-- 
GitLab


From cf96d977381d4a23957bade2ddf1c420b74a26b6 Mon Sep 17 00:00:00 2001
From: Wang Hai <wanghai38@huawei.com>
Date: Wed, 19 Aug 2020 10:33:09 +0800
Subject: [PATCH 0330/1341] net: gemini: Fix missing free_netdev() in error
 path of gemini_ethernet_port_probe()

Replace alloc_etherdev_mq with devm_alloc_etherdev_mqs. In this way,
when probe fails, netdev can be freed automatically.

Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/cortina/gemini.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c
index 66e67b24a887c..62e271aea4a50 100644
--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -2389,7 +2389,7 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
 
 	dev_info(dev, "probe %s ID %d\n", dev_name(dev), id);
 
-	netdev = alloc_etherdev_mq(sizeof(*port), TX_QUEUE_NUM);
+	netdev = devm_alloc_etherdev_mqs(dev, sizeof(*port), TX_QUEUE_NUM, TX_QUEUE_NUM);
 	if (!netdev) {
 		dev_err(dev, "Can't allocate ethernet device #%d\n", id);
 		return -ENOMEM;
@@ -2521,7 +2521,6 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
 	}
 
 	port->netdev = NULL;
-	free_netdev(netdev);
 	return ret;
 }
 
@@ -2530,7 +2529,6 @@ static int gemini_ethernet_port_remove(struct platform_device *pdev)
 	struct gemini_ethernet_port *port = platform_get_drvdata(pdev);
 
 	gemini_port_remove(port);
-	free_netdev(port->netdev);
 	return 0;
 }
 
-- 
GitLab


From e17a7c0e0aebb956719ce2a8465f649859c2da7d Mon Sep 17 00:00:00 2001
From: Frederic Barrat <fbarrat@linux.ibm.com>
Date: Wed, 19 Aug 2020 15:07:41 +0200
Subject: [PATCH 0331/1341] powerpc/powernv/pci: Fix possible crash when
 releasing DMA resources

Fix a typo introduced during recent code cleanup, which could lead to
silently not freeing resources or an oops message (on PCI hotplug or
CAPI reset).

Only impacts ioda2, the code path for ioda1 is correct.

Fixes: 01e12629af4e ("powerpc/powernv/pci: Add explicit tracking of the DMA setup state")
Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Reviewed-by: Oliver O'Halloran <oohall@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200819130741.16769-1-fbarrat@linux.ibm.com
---
 arch/powerpc/platforms/powernv/pci-ioda.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index c9c25fb0783c4..023a4f987bb22 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -2705,7 +2705,7 @@ void pnv_pci_ioda2_release_pe_dma(struct pnv_ioda_pe *pe)
 	struct iommu_table *tbl = pe->table_group.tables[0];
 	int64_t rc;
 
-	if (pe->dma_setup_done)
+	if (!pe->dma_setup_done)
 		return;
 
 	rc = pnv_pci_ioda2_unset_window(&pe->table_group, 0);
-- 
GitLab


From da2446b66b5e2c7f3ab63912c8d999810e35e8b3 Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Mon, 17 Aug 2020 22:38:38 +0800
Subject: [PATCH 0332/1341] Revert "drm/amdgpu: disable gfxoff for
 navy_flounder"

This reverts commit 9c9b17a7d19a8e21db2e378784fff1128b46c9d3.
Newly released sdma fw (51.52) provides a fix for the issue.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 142ffe2da7584..65997ffaed456 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -3595,9 +3595,6 @@ static void gfx_v10_0_check_gfxoff_flag(struct amdgpu_device *adev)
 		if (!gfx_v10_0_navi10_gfxoff_should_enable(adev))
 			adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
 		break;
-	case CHIP_NAVY_FLOUNDER:
-		adev->pm.pp_feature &= ~PP_GFXOFF_MASK;
-		break;
 	default:
 		break;
 	}
-- 
GitLab


From 6163a985e50cb19d5bdf73f98e45b8af91a77658 Mon Sep 17 00:00:00 2001
From: Juergen Gross <jgross@suse.com>
Date: Fri, 10 Jul 2020 16:16:51 +0200
Subject: [PATCH 0333/1341] efi: avoid error message when booting under Xen

efifb_probe() will issue an error message in case the kernel is booted
as Xen dom0 from UEFI as EFI_MEMMAP won't be set in this case. Avoid
that message by calling efi_mem_desc_lookup() only if EFI_MEMMAP is set.

Fixes: 38ac0287b7f4 ("fbdev/efifb: Honour UEFI memory map attributes when mapping the FB")
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 drivers/video/fbdev/efifb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/efifb.c b/drivers/video/fbdev/efifb.c
index 65491ae74808d..e57c00824965c 100644
--- a/drivers/video/fbdev/efifb.c
+++ b/drivers/video/fbdev/efifb.c
@@ -453,7 +453,7 @@ static int efifb_probe(struct platform_device *dev)
 	info->apertures->ranges[0].base = efifb_fix.smem_start;
 	info->apertures->ranges[0].size = size_remap;
 
-	if (efi_enabled(EFI_BOOT) &&
+	if (efi_enabled(EFI_MEMMAP) &&
 	    !efi_mem_desc_lookup(efifb_fix.smem_start, &md)) {
 		if ((efifb_fix.smem_start + efifb_fix.smem_len) >
 		    (md.phys_addr + (md.num_pages << EFI_PAGE_SHIFT))) {
-- 
GitLab


From ee87e1557c42dc9c2da11c38e11b87c311569853 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Thu, 20 Aug 2020 06:30:47 +0200
Subject: [PATCH 0334/1341] Fix build error when CONFIG_ACPI is not
 set/enabled:
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

../arch/x86/pci/xen.c: In function ‘pci_xen_init’:
../arch/x86/pci/xen.c:410:2: error: implicit declaration of function ‘acpi_noirq_set’; did you mean ‘acpi_irq_get’? [-Werror=implicit-function-declaration]
  acpi_noirq_set();

Fixes: 88e9ca161c13 ("xen/pci: Use acpi_noirq_set() helper to avoid #ifdef")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: xen-devel@lists.xenproject.org
Cc: linux-pci@vger.kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 arch/x86/pci/xen.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c
index e3f1ca3160684..db34fee931388 100644
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -26,6 +26,7 @@
 #include <asm/xen/pci.h>
 #include <asm/xen/cpuid.h>
 #include <asm/apic.h>
+#include <asm/acpi.h>
 #include <asm/i8259.h>
 
 static int xen_pcifront_enable_irq(struct pci_dev *dev)
-- 
GitLab


From a4501bac0e553bed117b7e1b166d49731caf7260 Mon Sep 17 00:00:00 2001
From: Rajendra Nayak <rnayak@codeaurora.org>
Date: Mon, 10 Aug 2020 12:36:19 +0530
Subject: [PATCH 0335/1341] opp: Enable resources again if they were disabled
 earlier

dev_pm_opp_set_rate() can now be called with freq = 0 in order
to either drop performance or bandwidth votes or to disable
regulators on platforms which support them.

In such cases, a subsequent call to dev_pm_opp_set_rate() with
the same frequency ends up returning early because 'old_freq == freq'

Instead make it fall through and put back the dropped performance
and bandwidth votes and/or enable back the regulators.

Cc: v5.3+ <stable@vger.kernel.org> # v5.3+
Fixes: cd7ea582866f ("opp: Make dev_pm_opp_set_rate() handle freq = 0 to drop performance votes")
Reported-by: Sajida Bhanu <sbhanu@codeaurora.org>
Reviewed-by: Sibi Sankar <sibis@codeaurora.org>
Reported-by: Matthias Kaehlcke <mka@chromium.org>
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
[ Viresh: Don't skip clk_set_rate() and massaged changelog ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/opp/core.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index bdb028c7793df..9668ea04cc808 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -934,10 +934,13 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
 
 	/* Return early if nothing to do */
 	if (old_freq == freq) {
-		dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n",
-			__func__, freq);
-		ret = 0;
-		goto put_opp_table;
+		if (!opp_table->required_opp_tables && !opp_table->regulators &&
+		    !opp_table->paths) {
+			dev_dbg(dev, "%s: old/new frequencies (%lu Hz) are same, nothing to do\n",
+				__func__, freq);
+			ret = 0;
+			goto put_opp_table;
+		}
 	}
 
 	/*
-- 
GitLab


From c8502eb2d43b6b9b1dc382299a4d37031be63876 Mon Sep 17 00:00:00 2001
From: Arvind Sankar <nivedita@alum.mit.edu>
Date: Fri, 17 Jul 2020 15:45:26 -0400
Subject: [PATCH 0336/1341] efi/x86: Mark kernel rodata non-executable for
 mixed mode

When remapping the kernel rodata section RO in the EFI pagetables, the
protection flags that were used for the text section are being reused,
but the rodata section should not be marked executable.

Cc: <stable@vger.kernel.org>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200717194526.3452089-1-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/x86/platform/efi/efi_64.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c
index 413583f904a69..6af4da1149bac 100644
--- a/arch/x86/platform/efi/efi_64.c
+++ b/arch/x86/platform/efi/efi_64.c
@@ -259,6 +259,8 @@ int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
 	npages = (__end_rodata - __start_rodata) >> PAGE_SHIFT;
 	rodata = __pa(__start_rodata);
 	pfn = rodata >> PAGE_SHIFT;
+
+	pf = _PAGE_NX | _PAGE_ENC;
 	if (kernel_map_pages_in_pgd(pgd, pfn, rodata, npages, pf)) {
 		pr_err("Failed to map kernel rodata 1:1\n");
 		return 1;
-- 
GitLab


From 98086df8b70c06234a8f4290c46064e44dafa0ed Mon Sep 17 00:00:00 2001
From: Li Heng <liheng40@huawei.com>
Date: Mon, 20 Jul 2020 15:22:18 +0800
Subject: [PATCH 0337/1341] efi: add missed destroy_workqueue when
 efisubsys_init fails

destroy_workqueue() should be called to destroy efi_rts_wq
when efisubsys_init() init resources fails.

Cc: <stable@vger.kernel.org>
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Li Heng <liheng40@huawei.com>
Link: https://lore.kernel.org/r/1595229738-10087-1-git-send-email-liheng40@huawei.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/efi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index fdd1db025dbfd..3aa07c3b51369 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -381,6 +381,7 @@ static int __init efisubsys_init(void)
 	efi_kobj = kobject_create_and_add("efi", firmware_kobj);
 	if (!efi_kobj) {
 		pr_err("efi: Firmware registration failed.\n");
+		destroy_workqueue(efi_rts_wq);
 		return -ENOMEM;
 	}
 
@@ -424,6 +425,7 @@ static int __init efisubsys_init(void)
 		generic_ops_unregister();
 err_put:
 	kobject_put(efi_kobj);
+	destroy_workqueue(efi_rts_wq);
 	return error;
 }
 
-- 
GitLab


From 1fd9717d75df68e3c3509b8e7b1138ca63472f88 Mon Sep 17 00:00:00 2001
From: Arvind Sankar <nivedita@alum.mit.edu>
Date: Sat, 25 Jul 2020 11:59:16 -0400
Subject: [PATCH 0338/1341] efi/libstub: Stop parsing arguments at "--"

Arguments after "--" are arguments for init, not for the kernel.

Cc: <stable@vger.kernel.org>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200725155916.1376773-1-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/libstub/efi-stub-helper.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index 6bca70bbb43d0..37ff34e7b85e4 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -201,6 +201,8 @@ efi_status_t efi_parse_options(char const *cmdline)
 		char *param, *val;
 
 		str = next_arg(str, &param, &val);
+		if (!val && !strcmp(param, "--"))
+			break;
 
 		if (!strcmp(param, "nokaslr")) {
 			efi_nokaslr = true;
-- 
GitLab


From a37ca6a2af9df2972372b918f09390c9303acfbd Mon Sep 17 00:00:00 2001
From: Arvind Sankar <nivedita@alum.mit.edu>
Date: Wed, 29 Jul 2020 15:33:00 -0400
Subject: [PATCH 0339/1341] efi/libstub: Handle NULL cmdline

Treat a NULL cmdline the same as empty. Although this is unlikely to
happen in practice, the x86 kernel entry does check for NULL cmdline and
handles it, so do it here as well.

Cc: <stable@vger.kernel.org>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200729193300.598448-1-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/libstub/efi-stub-helper.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index 37ff34e7b85e4..f53652a3a1060 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -187,10 +187,14 @@ int efi_printk(const char *fmt, ...)
  */
 efi_status_t efi_parse_options(char const *cmdline)
 {
-	size_t len = strlen(cmdline) + 1;
+	size_t len;
 	efi_status_t status;
 	char *str, *buf;
 
+	if (!cmdline)
+		return EFI_SUCCESS;
+
+	len = strlen(cmdline) + 1;
 	status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, len, (void **)&buf);
 	if (status != EFI_SUCCESS)
 		return status;
-- 
GitLab


From 8a8a3237a78cbc0557f0eb16a89f16d616323e99 Mon Sep 17 00:00:00 2001
From: Arvind Sankar <nivedita@alum.mit.edu>
Date: Thu, 13 Aug 2020 14:58:11 -0400
Subject: [PATCH 0340/1341] efi/libstub: Handle unterminated cmdline

Make the command line parsing more robust, by handling the case it is
not NUL-terminated.

Use strnlen instead of strlen, and make sure that the temporary copy is
NUL-terminated before parsing.

Cc: <stable@vger.kernel.org>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200813185811.554051-4-nivedita@alum.mit.edu
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/libstub/efi-stub-helper.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index f53652a3a1060..f735db55adc03 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -194,12 +194,14 @@ efi_status_t efi_parse_options(char const *cmdline)
 	if (!cmdline)
 		return EFI_SUCCESS;
 
-	len = strlen(cmdline) + 1;
+	len = strnlen(cmdline, COMMAND_LINE_SIZE - 1) + 1;
 	status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, len, (void **)&buf);
 	if (status != EFI_SUCCESS)
 		return status;
 
-	str = skip_spaces(memcpy(buf, cmdline, len));
+	memcpy(buf, cmdline, len - 1);
+	buf[len - 1] = '\0';
+	str = skip_spaces(buf);
 
 	while (*str) {
 		char *param, *val;
-- 
GitLab


From 39ada88f9c862c1ff8929ff67e0d1199c7af73fe Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ardb@kernel.org>
Date: Thu, 13 Aug 2020 19:38:17 +0200
Subject: [PATCH 0341/1341] efi/x86: Move 32-bit code into efi_32.c

Now that the old memmap code has been removed, some code that was left
behind in arch/x86/platform/efi/efi.c is only used for 32-bit builds,
which means it can live in efi_32.c as well. So move it over.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/x86/include/asm/efi.h     | 10 -----
 arch/x86/platform/efi/efi.c    | 69 ----------------------------------
 arch/x86/platform/efi/efi_32.c | 44 ++++++++++++++++++----
 3 files changed, 37 insertions(+), 86 deletions(-)

diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h
index b9c2667ac46cc..bc9758ef292ef 100644
--- a/arch/x86/include/asm/efi.h
+++ b/arch/x86/include/asm/efi.h
@@ -81,11 +81,8 @@ extern unsigned long efi_fw_vendor, efi_config_table;
 	kernel_fpu_end();						\
 })
 
-
 #define arch_efi_call_virt(p, f, args...)	p->f(args)
 
-#define efi_ioremap(addr, size, type, attr)	ioremap_cache(addr, size)
-
 #else /* !CONFIG_X86_32 */
 
 #define EFI_LOADER_SIGNATURE	"EL64"
@@ -125,9 +122,6 @@ struct efi_scratch {
 	kernel_fpu_end();						\
 })
 
-extern void __iomem *__init efi_ioremap(unsigned long addr, unsigned long size,
-					u32 type, u64 attribute);
-
 #ifdef CONFIG_KASAN
 /*
  * CONFIG_KASAN may redefine memset to __memset.  __memset function is present
@@ -143,17 +137,13 @@ extern void __iomem *__init efi_ioremap(unsigned long addr, unsigned long size,
 #endif /* CONFIG_X86_32 */
 
 extern struct efi_scratch efi_scratch;
-extern void __init efi_set_executable(efi_memory_desc_t *md, bool executable);
 extern int __init efi_memblock_x86_reserve_range(void);
 extern void __init efi_print_memmap(void);
-extern void __init efi_memory_uc(u64 addr, unsigned long size);
 extern void __init efi_map_region(efi_memory_desc_t *md);
 extern void __init efi_map_region_fixed(efi_memory_desc_t *md);
 extern void efi_sync_low_kernel_mappings(void);
 extern int __init efi_alloc_page_tables(void);
 extern int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages);
-extern void __init old_map_region(efi_memory_desc_t *md);
-extern void __init runtime_code_page_mkexec(void);
 extern void __init efi_runtime_update_mappings(void);
 extern void __init efi_dump_pagetable(void);
 extern void __init efi_apply_memmap_quirks(void);
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index f6ea8f1a9d57a..d37ebe6e70d7a 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -49,7 +49,6 @@
 #include <asm/efi.h>
 #include <asm/e820/api.h>
 #include <asm/time.h>
-#include <asm/set_memory.h>
 #include <asm/tlbflush.h>
 #include <asm/x86_init.h>
 #include <asm/uv/uv.h>
@@ -496,74 +495,6 @@ void __init efi_init(void)
 		efi_print_memmap();
 }
 
-#if defined(CONFIG_X86_32)
-
-void __init efi_set_executable(efi_memory_desc_t *md, bool executable)
-{
-	u64 addr, npages;
-
-	addr = md->virt_addr;
-	npages = md->num_pages;
-
-	memrange_efi_to_native(&addr, &npages);
-
-	if (executable)
-		set_memory_x(addr, npages);
-	else
-		set_memory_nx(addr, npages);
-}
-
-void __init runtime_code_page_mkexec(void)
-{
-	efi_memory_desc_t *md;
-
-	/* Make EFI runtime service code area executable */
-	for_each_efi_memory_desc(md) {
-		if (md->type != EFI_RUNTIME_SERVICES_CODE)
-			continue;
-
-		efi_set_executable(md, true);
-	}
-}
-
-void __init efi_memory_uc(u64 addr, unsigned long size)
-{
-	unsigned long page_shift = 1UL << EFI_PAGE_SHIFT;
-	u64 npages;
-
-	npages = round_up(size, page_shift) / page_shift;
-	memrange_efi_to_native(&addr, &npages);
-	set_memory_uc(addr, npages);
-}
-
-void __init old_map_region(efi_memory_desc_t *md)
-{
-	u64 start_pfn, end_pfn, end;
-	unsigned long size;
-	void *va;
-
-	start_pfn = PFN_DOWN(md->phys_addr);
-	size	  = md->num_pages << PAGE_SHIFT;
-	end	  = md->phys_addr + size;
-	end_pfn   = PFN_UP(end);
-
-	if (pfn_range_is_mapped(start_pfn, end_pfn)) {
-		va = __va(md->phys_addr);
-
-		if (!(md->attribute & EFI_MEMORY_WB))
-			efi_memory_uc((u64)(unsigned long)va, size);
-	} else
-		va = efi_ioremap(md->phys_addr, size,
-				 md->type, md->attribute);
-
-	md->virt_addr = (u64) (unsigned long) va;
-	if (!va)
-		pr_err("ioremap of 0x%llX failed!\n",
-		       (unsigned long long)md->phys_addr);
-}
-
-#endif
-
 /* Merge contiguous regions of the same type and attribute */
 static void __init efi_merge_regions(void)
 {
diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c
index 826ead67753da..e06a199423c0f 100644
--- a/arch/x86/platform/efi/efi_32.c
+++ b/arch/x86/platform/efi/efi_32.c
@@ -29,9 +29,35 @@
 #include <asm/io.h>
 #include <asm/desc.h>
 #include <asm/page.h>
+#include <asm/set_memory.h>
 #include <asm/tlbflush.h>
 #include <asm/efi.h>
 
+void __init efi_map_region(efi_memory_desc_t *md)
+{
+	u64 start_pfn, end_pfn, end;
+	unsigned long size;
+	void *va;
+
+	start_pfn	= PFN_DOWN(md->phys_addr);
+	size		= md->num_pages << PAGE_SHIFT;
+	end		= md->phys_addr + size;
+	end_pfn 	= PFN_UP(end);
+
+	if (pfn_range_is_mapped(start_pfn, end_pfn)) {
+		va = __va(md->phys_addr);
+
+		if (!(md->attribute & EFI_MEMORY_WB))
+			set_memory_uc((unsigned long)va, md->num_pages);
+	} else {
+		va = ioremap_cache(md->phys_addr, size);
+	}
+
+	md->virt_addr = (unsigned long)va;
+	if (!va)
+		pr_err("ioremap of 0x%llX failed!\n", md->phys_addr);
+}
+
 /*
  * To make EFI call EFI runtime service in physical addressing mode we need
  * prolog/epilog before/after the invocation to claim the EFI runtime service
@@ -58,11 +84,6 @@ int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages)
 	return 0;
 }
 
-void __init efi_map_region(efi_memory_desc_t *md)
-{
-	old_map_region(md);
-}
-
 void __init efi_map_region_fixed(efi_memory_desc_t *md) {}
 void __init parse_efi_setup(u64 phys_addr, u32 data_len) {}
 
@@ -107,6 +128,15 @@ efi_status_t __init efi_set_virtual_address_map(unsigned long memory_map_size,
 
 void __init efi_runtime_update_mappings(void)
 {
-	if (__supported_pte_mask & _PAGE_NX)
-		runtime_code_page_mkexec();
+	if (__supported_pte_mask & _PAGE_NX) {
+		efi_memory_desc_t *md;
+
+		/* Make EFI runtime service code area executable */
+		for_each_efi_memory_desc(md) {
+			if (md->type != EFI_RUNTIME_SERVICES_CODE)
+				continue;
+
+			set_memory_x(md->virt_addr, md->num_pages);
+		}
+	}
 }
-- 
GitLab


From fb1201aececc59990b75ef59fca93ae4aa1e1444 Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ardb@kernel.org>
Date: Mon, 17 Aug 2020 12:00:17 +0200
Subject: [PATCH 0342/1341] Documentation: efi: remove description of
 efi=old_map

The old EFI runtime region mapping logic that was kept around for some
time has finally been removed entirely, along with the SGI UV1 support
code that was its last remaining user. So remove any mention of the
efi=old_map command line parameter from the docs.

Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 Documentation/admin-guide/kernel-parameters.txt | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index bdc1f33fd3d10..a1068742a6df1 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -1233,8 +1233,7 @@
 	efi=		[EFI]
 			Format: { "debug", "disable_early_pci_dma",
 				  "nochunk", "noruntime", "nosoftreserve",
-				  "novamap", "no_disable_early_pci_dma",
-				  "old_map" }
+				  "novamap", "no_disable_early_pci_dma" }
 			debug: enable misc debug output.
 			disable_early_pci_dma: disable the busmaster bit on all
 			PCI bridges while in the EFI boot stub.
@@ -1251,8 +1250,6 @@
 			novamap: do not call SetVirtualAddressMap().
 			no_disable_early_pci_dma: Leave the busmaster bit set
 			on all PCI bridges while in the EFI boot stub
-			old_map [X86-64]: switch to the old ioremap-based EFI
-			runtime services mapping. [Needs CONFIG_X86_UV=y]
 
 	efi_no_storage_paranoia [EFI; X86]
 			Using this parameter you can use more than 50% of
-- 
GitLab


From 17899eaf88d689529b866371344c8f269ba79b5f Mon Sep 17 00:00:00 2001
From: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Date: Thu, 6 Aug 2020 08:46:32 -0400
Subject: [PATCH 0343/1341] powerpc/perf: Fix soft lockups due to missed
 interrupt accounting

Performance monitor interrupt handler checks if any counter has
overflown and calls record_and_restart() in core-book3s which invokes
perf_event_overflow() to record the sample information. Apart from
creating sample, perf_event_overflow() also does the interrupt and
period checks via perf_event_account_interrupt().

Currently we record information only if the SIAR (Sampled Instruction
Address Register) valid bit is set (using siar_valid() check) and
hence the interrupt check.

But it is possible that we do sampling for some events that are not
generating valid SIAR, and hence there is no chance to disable the
event if interrupts are more than max_samples_per_tick. This leads to
soft lockup.

Fix this by adding perf_event_account_interrupt() in the invalid SIAR
code path for a sampling event. ie if SIAR is invalid, just do
interrupt check and don't record the sample information.

Reported-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Tested-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1596717992-7321-1-git-send-email-atrajeev@linux.vnet.ibm.com
---
 arch/powerpc/perf/core-book3s.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 00038650a007f..93d20e1ed8451 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -2141,6 +2141,10 @@ static void record_and_restart(struct perf_event *event, unsigned long val,
 
 		if (perf_event_overflow(event, &data, regs))
 			power_pmu_stop(event, 0);
+	} else if (period) {
+		/* Account for interrupt in case of invalid SIAR */
+		if (perf_event_account_interrupt(event))
+			power_pmu_stop(event, 0);
 	}
 }
 
-- 
GitLab


From 4469add9d3b3cdade854997720ebfeb53a83d761 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Mon, 10 Aug 2020 08:58:24 +0100
Subject: [PATCH 0344/1341] RDMA/core: Fix spelling mistake "Could't" ->
 "Couldn't"

There is a spelling mistake in a pr_warn message. Fix it.

Link: https://lore.kernel.org/r/20200810075824.46770-1-colin.king@canonical.com
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/core/device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index ef0cd29986719..c36b4d2b61e0c 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -2751,7 +2751,7 @@ static int __init ib_core_init(void)
 
 	ret = addr_init();
 	if (ret) {
-		pr_warn("Could't init IB address resolution\n");
+		pr_warn("Couldn't init IB address resolution\n");
 		goto err_ibnl;
 	}
 
-- 
GitLab


From a812f2d60a9fb7818f9c81f967180317b52545c0 Mon Sep 17 00:00:00 2001
From: Selvin Xavier <selvin.xavier@broadcom.com>
Date: Wed, 5 Aug 2020 21:45:48 -0700
Subject: [PATCH 0345/1341] RDMA/bnxt_re: Do not add user qps to flushlist

Driver shall add only the kernel qps to the flush list for clean up.
During async error events from the HW, driver is adding qps to this list
without checking if the qp is kernel qp or not.

Add a check to avoid user qp addition to the flush list.

Fixes: 942c9b6ca8de ("RDMA/bnxt_re: Avoid Hard lockup during error CQE processing")
Fixes: c50866e2853a ("bnxt_re: fix the regression due to changes in alloc_pbl")
Link: https://lore.kernel.org/r/1596689148-4023-1-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/bnxt_re/main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index dad0df8a24679..17ac8b7c57104 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -821,7 +821,8 @@ static int bnxt_re_handle_qp_async_event(struct creq_qp_event *qp_event,
 	struct ib_event event;
 	unsigned int flags;
 
-	if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR) {
+	if (qp->qplib_qp.state == CMDQ_MODIFY_QP_NEW_STATE_ERR &&
+	    rdma_is_kernel_res(&qp->ib_qp.res)) {
 		flags = bnxt_re_lock_cqs(qp);
 		bnxt_qplib_add_flush_qp(&qp->qplib_qp);
 		bnxt_re_unlock_cqs(qp, flags);
-- 
GitLab


From b25e8e85e75a61af1ddc88c4798387dd3132dd43 Mon Sep 17 00:00:00 2001
From: Kaike Wan <kaike.wan@intel.com>
Date: Tue, 11 Aug 2020 13:49:31 -0400
Subject: [PATCH 0346/1341] RDMA/hfi1: Correct an interlock issue for TID RDMA
 WRITE request

The following message occurs when running an AI application with TID RDMA
enabled:

hfi1 0000:7f:00.0: hfi1_0: [QP74] hfi1_tid_timeout 4084
hfi1 0000:7f:00.0: hfi1_0: [QP70] hfi1_tid_timeout 4084

The issue happens when TID RDMA WRITE request is followed by an
IB_WR_RDMA_WRITE_WITH_IMM request, the latter could be completed first on
the responder side. As a result, no ACK packet for the latter could be
sent because the TID RDMA WRITE request is still being processed on the
responder side.

When the TID RDMA WRITE request is eventually completed, the requester
will wait for the IB_WR_RDMA_WRITE_WITH_IMM request to be acknowledged.

If the next request is another TID RDMA WRITE request, no TID RDMA WRITE
DATA packet could be sent because the preceding IB_WR_RDMA_WRITE_WITH_IMM
request is not completed yet.

Consequently the IB_WR_RDMA_WRITE_WITH_IMM will be retried but it will be
ignored on the responder side because the responder thinks it has already
been completed. Eventually the retry will be exhausted and the qp will be
put into error state on the requester side. On the responder side, the TID
resource timer will eventually expire because no TID RDMA WRITE DATA
packets will be received for the second TID RDMA WRITE request.  There is
also risk of a write-after-write memory corruption due to the issue.

Fix by adding a requester side interlock to prevent any potential data
corruption and TID RDMA protocol error.

Fixes: a0b34f75ec20 ("IB/hfi1: Add interlock between a TID RDMA request and other requests")
Link: https://lore.kernel.org/r/20200811174931.191210.84093.stgit@awfm-01.aw.intel.com
Cc: <stable@vger.kernel.org> # 5.4.x+
Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Kaike Wan <kaike.wan@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/hfi1/tid_rdma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/infiniband/hw/hfi1/tid_rdma.c b/drivers/infiniband/hw/hfi1/tid_rdma.c
index 9af82ff933d73..73d197e217305 100644
--- a/drivers/infiniband/hw/hfi1/tid_rdma.c
+++ b/drivers/infiniband/hw/hfi1/tid_rdma.c
@@ -3215,6 +3215,7 @@ bool hfi1_tid_rdma_wqe_interlock(struct rvt_qp *qp, struct rvt_swqe *wqe)
 	case IB_WR_ATOMIC_CMP_AND_SWP:
 	case IB_WR_ATOMIC_FETCH_AND_ADD:
 	case IB_WR_RDMA_WRITE:
+	case IB_WR_RDMA_WRITE_WITH_IMM:
 		switch (prev->wr.opcode) {
 		case IB_WR_TID_RDMA_WRITE:
 			req = wqe_to_tid_req(prev);
-- 
GitLab


From 6da06c6291f38be4df6df2efb76ba925096d2691 Mon Sep 17 00:00:00 2001
From: Weihang Li <liweihang@huawei.com>
Date: Wed, 19 Aug 2020 17:39:44 +0800
Subject: [PATCH 0347/1341] Revert "RDMA/hns: Reserve one sge in order to avoid
 local length error"

This patch caused some issues on SEND operation, and it should be reverted
to make the drivers work correctly. There will be a better solution that
has been tested carefully to solve the original problem.

This reverts commit 711195e57d341e58133d92cf8aaab1db24e4768d.

Fixes: 711195e57d34 ("RDMA/hns: Reserve one sge in order to avoid local length error")
Link: https://lore.kernel.org/r/1597829984-20223-1-git-send-email-liweihang@huawei.com
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/hns/hns_roce_device.h | 2 --
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c  | 9 ++++-----
 drivers/infiniband/hw/hns/hns_roce_hw_v2.h  | 4 +---
 drivers/infiniband/hw/hns/hns_roce_qp.c     | 5 ++---
 drivers/infiniband/hw/hns/hns_roce_srq.c    | 2 +-
 5 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index da9888deff8c2..6edcbdcd8f432 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -65,8 +65,6 @@
 #define HNS_ROCE_CQE_WCMD_EMPTY_BIT		0x2
 #define HNS_ROCE_MIN_CQE_CNT			16
 
-#define HNS_ROCE_RESERVED_SGE			1
-
 #define HNS_ROCE_MAX_IRQ_NUM			128
 
 #define HNS_ROCE_SGE_IN_WQE			2
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index d2968594664bb..4cda95ed1fbe2 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -633,7 +633,7 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp,
 
 		wqe_idx = (hr_qp->rq.head + nreq) & (hr_qp->rq.wqe_cnt - 1);
 
-		if (unlikely(wr->num_sge >= hr_qp->rq.max_gs)) {
+		if (unlikely(wr->num_sge > hr_qp->rq.max_gs)) {
 			ibdev_err(ibdev, "rq:num_sge=%d >= qp->sq.max_gs=%d\n",
 				  wr->num_sge, hr_qp->rq.max_gs);
 			ret = -EINVAL;
@@ -653,7 +653,6 @@ static int hns_roce_v2_post_recv(struct ib_qp *ibqp,
 		if (wr->num_sge < hr_qp->rq.max_gs) {
 			dseg->lkey = cpu_to_le32(HNS_ROCE_INVALID_LKEY);
 			dseg->addr = 0;
-			dseg->len = cpu_to_le32(HNS_ROCE_INVALID_SGE_LENGTH);
 		}
 
 		/* rq support inline data */
@@ -787,8 +786,8 @@ static int hns_roce_v2_post_srq_recv(struct ib_srq *ibsrq,
 		}
 
 		if (wr->num_sge < srq->max_gs) {
-			dseg[i].len = cpu_to_le32(HNS_ROCE_INVALID_SGE_LENGTH);
-			dseg[i].lkey = cpu_to_le32(HNS_ROCE_INVALID_LKEY);
+			dseg[i].len = 0;
+			dseg[i].lkey = cpu_to_le32(0x100);
 			dseg[i].addr = 0;
 		}
 
@@ -5070,7 +5069,7 @@ static int hns_roce_v2_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
 
 	attr->srq_limit = limit_wl;
 	attr->max_wr = srq->wqe_cnt - 1;
-	attr->max_sge = srq->max_gs - HNS_ROCE_RESERVED_SGE;
+	attr->max_sge = srq->max_gs;
 
 out:
 	hns_roce_free_cmd_mailbox(hr_dev, mailbox);
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
index 1fb1c583d0f8f..ac29be43b6bd5 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
@@ -92,9 +92,7 @@
 #define HNS_ROCE_V2_CQC_TIMER_ENTRY_SZ		PAGE_SIZE
 #define HNS_ROCE_V2_PAGE_SIZE_SUPPORTED		0xFFFFF000
 #define HNS_ROCE_V2_MAX_INNER_MTPT_NUM		2
-#define HNS_ROCE_INVALID_LKEY			0x0
-#define HNS_ROCE_INVALID_SGE_LENGTH		0x80000000
-
+#define HNS_ROCE_INVALID_LKEY			0x100
 #define HNS_ROCE_CMQ_TX_TIMEOUT			30000
 #define HNS_ROCE_V2_UC_RC_SGE_NUM_IN_WQE	2
 #define HNS_ROCE_V2_RSV_QPS			8
diff --git a/drivers/infiniband/hw/hns/hns_roce_qp.c b/drivers/infiniband/hw/hns/hns_roce_qp.c
index e94ca130ff5eb..c063c450c715f 100644
--- a/drivers/infiniband/hw/hns/hns_roce_qp.c
+++ b/drivers/infiniband/hw/hns/hns_roce_qp.c
@@ -386,8 +386,7 @@ static int set_rq_size(struct hns_roce_dev *hr_dev, struct ib_qp_cap *cap,
 		return -EINVAL;
 	}
 
-	hr_qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge) +
-					      HNS_ROCE_RESERVED_SGE);
+	hr_qp->rq.max_gs = roundup_pow_of_two(max(1U, cap->max_recv_sge));
 
 	if (hr_dev->caps.max_rq_sg <= HNS_ROCE_SGE_IN_WQE)
 		hr_qp->rq.wqe_shift = ilog2(hr_dev->caps.max_rq_desc_sz);
@@ -402,7 +401,7 @@ static int set_rq_size(struct hns_roce_dev *hr_dev, struct ib_qp_cap *cap,
 		hr_qp->rq_inl_buf.wqe_cnt = 0;
 
 	cap->max_recv_wr = cnt;
-	cap->max_recv_sge = hr_qp->rq.max_gs - HNS_ROCE_RESERVED_SGE;
+	cap->max_recv_sge = hr_qp->rq.max_gs;
 
 	return 0;
 }
diff --git a/drivers/infiniband/hw/hns/hns_roce_srq.c b/drivers/infiniband/hw/hns/hns_roce_srq.c
index f40a000e94ee7..b9e2dbd372b66 100644
--- a/drivers/infiniband/hw/hns/hns_roce_srq.c
+++ b/drivers/infiniband/hw/hns/hns_roce_srq.c
@@ -297,7 +297,7 @@ int hns_roce_create_srq(struct ib_srq *ib_srq,
 	spin_lock_init(&srq->lock);
 
 	srq->wqe_cnt = roundup_pow_of_two(init_attr->attr.max_wr + 1);
-	srq->max_gs = init_attr->attr.max_sge + HNS_ROCE_RESERVED_SGE;
+	srq->max_gs = init_attr->attr.max_sge;
 
 	if (udata) {
 		ret = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd));
-- 
GitLab


From bb175342aa64e6c6f1d04f5235502121d6ff0247 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Thu, 20 Aug 2020 11:33:35 +0300
Subject: [PATCH 0348/1341] io_uring: fix racy req->flags modification

Setting and clearing REQ_F_OVERFLOW in io_uring_cancel_files() and
io_cqring_overflow_flush() are racy, because they might be called
asynchronously.

REQ_F_OVERFLOW flag in only needed for files cancellation, so if it can
be guaranteed that requests _currently_ marked inflight can't be
overflown, the problem will be solved with removing the flag
altogether.

That's how the patch works, it removes inflight status of a request
in io_cqring_fill_event() whenever it should be thrown into CQ-overflow
list. That's Ok to do, because no opcode specific handling can be done
after io_cqring_fill_event(), the same assumption as with "struct
io_completion" patches.
And it already have a good place for such cleanups, which is
io_clean_op(). A nice side effect of this is removing this inflight
check from the hot path.

note on synchronisation: now __io_cqring_fill_event() may be taking two
spinlocks simultaneously, completion_lock and inflight_lock. It's fine,
because we never do that in reverse order, and CQ-overflow of inflight
requests shouldn't happen often.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 61 ++++++++++++++-------------------------------------
 1 file changed, 17 insertions(+), 44 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 1f2f31d93686f..d43a20a554e4c 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -540,7 +540,6 @@ enum {
 	REQ_F_ISREG_BIT,
 	REQ_F_COMP_LOCKED_BIT,
 	REQ_F_NEED_CLEANUP_BIT,
-	REQ_F_OVERFLOW_BIT,
 	REQ_F_POLLED_BIT,
 	REQ_F_BUFFER_SELECTED_BIT,
 	REQ_F_NO_FILE_TABLE_BIT,
@@ -583,8 +582,6 @@ enum {
 	REQ_F_COMP_LOCKED	= BIT(REQ_F_COMP_LOCKED_BIT),
 	/* needs cleanup */
 	REQ_F_NEED_CLEANUP	= BIT(REQ_F_NEED_CLEANUP_BIT),
-	/* in overflow list */
-	REQ_F_OVERFLOW		= BIT(REQ_F_OVERFLOW_BIT),
 	/* already went through poll handler */
 	REQ_F_POLLED		= BIT(REQ_F_POLLED_BIT),
 	/* buffer already selected */
@@ -946,7 +943,8 @@ static void io_get_req_task(struct io_kiocb *req)
 
 static inline void io_clean_op(struct io_kiocb *req)
 {
-	if (req->flags & (REQ_F_NEED_CLEANUP | REQ_F_BUFFER_SELECTED))
+	if (req->flags & (REQ_F_NEED_CLEANUP | REQ_F_BUFFER_SELECTED |
+			  REQ_F_INFLIGHT))
 		__io_clean_op(req);
 }
 
@@ -1366,7 +1364,6 @@ static bool io_cqring_overflow_flush(struct io_ring_ctx *ctx, bool force)
 		req = list_first_entry(&ctx->cq_overflow_list, struct io_kiocb,
 						compl.list);
 		list_move(&req->compl.list, &list);
-		req->flags &= ~REQ_F_OVERFLOW;
 		if (cqe) {
 			WRITE_ONCE(cqe->user_data, req->user_data);
 			WRITE_ONCE(cqe->res, req->result);
@@ -1419,7 +1416,6 @@ static void __io_cqring_fill_event(struct io_kiocb *req, long res, long cflags)
 			ctx->rings->sq_flags |= IORING_SQ_CQ_OVERFLOW;
 		}
 		io_clean_op(req);
-		req->flags |= REQ_F_OVERFLOW;
 		req->result = res;
 		req->compl.cflags = cflags;
 		refcount_inc(&req->refs);
@@ -1563,17 +1559,6 @@ static bool io_dismantle_req(struct io_kiocb *req)
 	if (req->file)
 		io_put_file(req, req->file, (req->flags & REQ_F_FIXED_FILE));
 
-	if (req->flags & REQ_F_INFLIGHT) {
-		struct io_ring_ctx *ctx = req->ctx;
-		unsigned long flags;
-
-		spin_lock_irqsave(&ctx->inflight_lock, flags);
-		list_del(&req->inflight_entry);
-		if (waitqueue_active(&ctx->inflight_wait))
-			wake_up(&ctx->inflight_wait);
-		spin_unlock_irqrestore(&ctx->inflight_lock, flags);
-	}
-
 	return io_req_clean_work(req);
 }
 
@@ -5634,6 +5619,18 @@ static void __io_clean_op(struct io_kiocb *req)
 		}
 		req->flags &= ~REQ_F_NEED_CLEANUP;
 	}
+
+	if (req->flags & REQ_F_INFLIGHT) {
+		struct io_ring_ctx *ctx = req->ctx;
+		unsigned long flags;
+
+		spin_lock_irqsave(&ctx->inflight_lock, flags);
+		list_del(&req->inflight_entry);
+		if (waitqueue_active(&ctx->inflight_wait))
+			wake_up(&ctx->inflight_wait);
+		spin_unlock_irqrestore(&ctx->inflight_lock, flags);
+		req->flags &= ~REQ_F_INFLIGHT;
+	}
 }
 
 static int io_issue_sqe(struct io_kiocb *req, const struct io_uring_sqe *sqe,
@@ -8108,33 +8105,9 @@ static void io_uring_cancel_files(struct io_ring_ctx *ctx,
 		/* We need to keep going until we don't find a matching req */
 		if (!cancel_req)
 			break;
-
-		if (cancel_req->flags & REQ_F_OVERFLOW) {
-			spin_lock_irq(&ctx->completion_lock);
-			list_del(&cancel_req->compl.list);
-			cancel_req->flags &= ~REQ_F_OVERFLOW;
-
-			io_cqring_mark_overflow(ctx);
-			WRITE_ONCE(ctx->rings->cq_overflow,
-				atomic_inc_return(&ctx->cached_cq_overflow));
-			io_commit_cqring(ctx);
-			spin_unlock_irq(&ctx->completion_lock);
-
-			/*
-			 * Put inflight ref and overflow ref. If that's
-			 * all we had, then we're done with this request.
-			 */
-			if (refcount_sub_and_test(2, &cancel_req->refs)) {
-				io_free_req(cancel_req);
-				finish_wait(&ctx->inflight_wait, &wait);
-				continue;
-			}
-		} else {
-			/* cancel this request, or head link requests */
-			io_attempt_cancel(ctx, cancel_req);
-			io_put_req(cancel_req);
-		}
-
+		/* cancel this request, or head link requests */
+		io_attempt_cancel(ctx, cancel_req);
+		io_put_req(cancel_req);
 		schedule();
 		finish_wait(&ctx->inflight_wait, &wait);
 	}
-- 
GitLab


From f261c16861b82951bd2125706660ce4602930563 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Thu, 20 Aug 2020 11:34:10 +0300
Subject: [PATCH 0349/1341] io_uring: comment on kfree(iovec) checks

kfree() handles NULL pointers well, but io_{read,write}() checks it
because of performance reasons. Leave a comment there for those who are
tempted to patch it.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index d43a20a554e4c..b9ca5a54dc204 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3204,6 +3204,7 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
 	kiocb_done(kiocb, ret, cs);
 	ret = 0;
 out_free:
+	/* it's reportedly faster than delegating the null check to kfree() */
 	if (iovec)
 		kfree(iovec);
 	return ret;
@@ -3300,6 +3301,7 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
 			return -EAGAIN;
 	}
 out_free:
+	/* it's reportedly faster than delegating the null check to kfree() */
 	if (iovec)
 		kfree(iovec);
 	return ret;
-- 
GitLab


From 867a23eab52847d41a0a6eae41a64d76de7782a8 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Thu, 20 Aug 2020 11:34:39 +0300
Subject: [PATCH 0350/1341] io_uring: kill extra iovec=NULL in import_iovec()

If io_import_iovec() returns an error, return iovec is undefined and
must not be used, so don't set it to NULL when failing.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b9ca5a54dc204..91e2cc8414f9a 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2826,10 +2826,8 @@ static ssize_t __io_import_iovec(int rw, struct io_kiocb *req,
 	if (opcode == IORING_OP_READ || opcode == IORING_OP_WRITE) {
 		if (req->flags & REQ_F_BUFFER_SELECT) {
 			buf = io_rw_buffer_select(req, &sqe_len, needs_lock);
-			if (IS_ERR(buf)) {
-				*iovec = NULL;
+			if (IS_ERR(buf))
 				return PTR_ERR(buf);
-			}
 			req->rw.len = sqe_len;
 		}
 
-- 
GitLab


From cc5453a5b7e90c39f713091a7ebc53c1f87d1700 Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Tue, 18 Aug 2020 16:15:58 +0200
Subject: [PATCH 0351/1341] netfilter: conntrack: allow sctp hearbeat after
 connection re-use

If an sctp connection gets re-used, heartbeats are flagged as invalid
because their vtag doesn't match.

Handle this in a similar way as TCP conntrack when it suspects that the
endpoints and conntrack are out-of-sync.

When a HEARTBEAT request fails its vtag validation, flag this in the
conntrack state and accept the packet.

When a HEARTBEAT_ACK is received with an invalid vtag in the reverse
direction after we allowed such a HEARTBEAT through, assume we are
out-of-sync and re-set the vtag info.

v2: remove left-over snippet from an older incarnation that moved
    new_state/old_state assignments, thats not needed so keep that
    as-is.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/linux/netfilter/nf_conntrack_sctp.h |  2 ++
 net/netfilter/nf_conntrack_proto_sctp.c     | 39 ++++++++++++++++++---
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/include/linux/netfilter/nf_conntrack_sctp.h b/include/linux/netfilter/nf_conntrack_sctp.h
index 9a33f171aa822..625f491b95de8 100644
--- a/include/linux/netfilter/nf_conntrack_sctp.h
+++ b/include/linux/netfilter/nf_conntrack_sctp.h
@@ -9,6 +9,8 @@ struct ip_ct_sctp {
 	enum sctp_conntrack state;
 
 	__be32 vtag[IP_CT_DIR_MAX];
+	u8 last_dir;
+	u8 flags;
 };
 
 #endif /* _NF_CONNTRACK_SCTP_H */
diff --git a/net/netfilter/nf_conntrack_proto_sctp.c b/net/netfilter/nf_conntrack_proto_sctp.c
index 4f897b14b6069..810cca24b3990 100644
--- a/net/netfilter/nf_conntrack_proto_sctp.c
+++ b/net/netfilter/nf_conntrack_proto_sctp.c
@@ -62,6 +62,8 @@ static const unsigned int sctp_timeouts[SCTP_CONNTRACK_MAX] = {
 	[SCTP_CONNTRACK_HEARTBEAT_ACKED]	= 210 SECS,
 };
 
+#define	SCTP_FLAG_HEARTBEAT_VTAG_FAILED	1
+
 #define sNO SCTP_CONNTRACK_NONE
 #define	sCL SCTP_CONNTRACK_CLOSED
 #define	sCW SCTP_CONNTRACK_COOKIE_WAIT
@@ -369,6 +371,7 @@ int nf_conntrack_sctp_packet(struct nf_conn *ct,
 	u_int32_t offset, count;
 	unsigned int *timeouts;
 	unsigned long map[256 / sizeof(unsigned long)] = { 0 };
+	bool ignore = false;
 
 	if (sctp_error(skb, dataoff, state))
 		return -NF_ACCEPT;
@@ -427,15 +430,39 @@ int nf_conntrack_sctp_packet(struct nf_conn *ct,
 			/* Sec 8.5.1 (D) */
 			if (sh->vtag != ct->proto.sctp.vtag[dir])
 				goto out_unlock;
-		} else if (sch->type == SCTP_CID_HEARTBEAT ||
-			   sch->type == SCTP_CID_HEARTBEAT_ACK) {
+		} else if (sch->type == SCTP_CID_HEARTBEAT) {
+			if (ct->proto.sctp.vtag[dir] == 0) {
+				pr_debug("Setting %d vtag %x for dir %d\n", sch->type, sh->vtag, dir);
+				ct->proto.sctp.vtag[dir] = sh->vtag;
+			} else if (sh->vtag != ct->proto.sctp.vtag[dir]) {
+				if (test_bit(SCTP_CID_DATA, map) || ignore)
+					goto out_unlock;
+
+				ct->proto.sctp.flags |= SCTP_FLAG_HEARTBEAT_VTAG_FAILED;
+				ct->proto.sctp.last_dir = dir;
+				ignore = true;
+				continue;
+			} else if (ct->proto.sctp.flags & SCTP_FLAG_HEARTBEAT_VTAG_FAILED) {
+				ct->proto.sctp.flags &= ~SCTP_FLAG_HEARTBEAT_VTAG_FAILED;
+			}
+		} else if (sch->type == SCTP_CID_HEARTBEAT_ACK) {
 			if (ct->proto.sctp.vtag[dir] == 0) {
 				pr_debug("Setting vtag %x for dir %d\n",
 					 sh->vtag, dir);
 				ct->proto.sctp.vtag[dir] = sh->vtag;
 			} else if (sh->vtag != ct->proto.sctp.vtag[dir]) {
-				pr_debug("Verification tag check failed\n");
-				goto out_unlock;
+				if (test_bit(SCTP_CID_DATA, map) || ignore)
+					goto out_unlock;
+
+				if ((ct->proto.sctp.flags & SCTP_FLAG_HEARTBEAT_VTAG_FAILED) == 0 ||
+				    ct->proto.sctp.last_dir == dir)
+					goto out_unlock;
+
+				ct->proto.sctp.flags &= ~SCTP_FLAG_HEARTBEAT_VTAG_FAILED;
+				ct->proto.sctp.vtag[dir] = sh->vtag;
+				ct->proto.sctp.vtag[!dir] = 0;
+			} else if (ct->proto.sctp.flags & SCTP_FLAG_HEARTBEAT_VTAG_FAILED) {
+				ct->proto.sctp.flags &= ~SCTP_FLAG_HEARTBEAT_VTAG_FAILED;
 			}
 		}
 
@@ -470,6 +497,10 @@ int nf_conntrack_sctp_packet(struct nf_conn *ct,
 	}
 	spin_unlock_bh(&ct->lock);
 
+	/* allow but do not refresh timeout */
+	if (ignore)
+		return NF_ACCEPT;
+
 	timeouts = nf_ct_timeout_lookup(ct);
 	if (!timeouts)
 		timeouts = nf_sctp_pernet(nf_ct_net(ct))->timeouts;
-- 
GitLab


From 90a9b102eddf6a3f987d15f4454e26a2532c1c98 Mon Sep 17 00:00:00 2001
From: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
Date: Thu, 20 Aug 2020 11:48:44 +0530
Subject: [PATCH 0352/1341] powerpc/pseries: Do not initiate shutdown when
 system is running on UPS

As per PAPR we have to look for both EPOW sensor value and event
modifier to identify the type of event and take appropriate action.

In LoPAPR v1.1 section 10.2.2 includes table 136 "EPOW Action Codes":

  SYSTEM_SHUTDOWN 3

  The system must be shut down. An EPOW-aware OS logs the EPOW error
  log information, then schedules the system to be shut down to begin
  after an OS defined delay internal (default is 10 minutes.)

Then in section 10.3.2.2.8 there is table 146 "Platform Event Log
Format, Version 6, EPOW Section", which includes the "EPOW Event
Modifier":

  For EPOW sensor value = 3
  0x01 = Normal system shutdown with no additional delay
  0x02 = Loss of utility power, system is running on UPS/Battery
  0x03 = Loss of system critical functions, system should be shutdown
  0x04 = Ambient temperature too high
  All other values = reserved

We have a user space tool (rtas_errd) on LPAR to monitor for
EPOW_SHUTDOWN_ON_UPS. Once it gets an event it initiates shutdown
after predefined time. It also starts monitoring for any new EPOW
events. If it receives "Power restored" event before predefined time
it will cancel the shutdown. Otherwise after predefined time it will
shutdown the system.

Commit 79872e35469b ("powerpc/pseries: All events of
EPOW_SYSTEM_SHUTDOWN must initiate shutdown") changed our handling of
the "on UPS/Battery" case, to immediately shutdown the system. This
breaks existing setups that rely on the userspace tool to delay
shutdown and let the system run on the UPS.

Fixes: 79872e35469b ("powerpc/pseries: All events of EPOW_SYSTEM_SHUTDOWN must initiate shutdown")
Cc: stable@vger.kernel.org # v4.0+
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
[mpe: Massage change log and add PAPR references]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200820061844.306460-1-hegdevasant@linux.vnet.ibm.com
---
 arch/powerpc/platforms/pseries/ras.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index f3736fcd98fcb..13c86a292c6d7 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -184,7 +184,6 @@ static void handle_system_shutdown(char event_modifier)
 	case EPOW_SHUTDOWN_ON_UPS:
 		pr_emerg("Loss of system power detected. System is running on"
 			 " UPS/battery. Check RTAS error log for details\n");
-		orderly_poweroff(true);
 		break;
 
 	case EPOW_SHUTDOWN_LOSS_OF_CRITICAL_FUNCTIONS:
-- 
GitLab


From 1e891e513e16c145cc9b45b1fdb8bf4a4f2f9557 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Toke=20H=C3=B8iland-J=C3=B8rgensen?= <toke@redhat.com>
Date: Wed, 19 Aug 2020 13:05:34 +0200
Subject: [PATCH 0353/1341] libbpf: Fix map index used in error message
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The error message emitted by bpf_object__init_user_btf_maps() was using the
wrong section ID.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200819110534.9058-1-toke@redhat.com
---
 tools/lib/bpf/libbpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 5d20b2da44271..0ad0b0491e1f2 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -2264,7 +2264,7 @@ static int bpf_object__init_user_btf_maps(struct bpf_object *obj, bool strict,
 		data = elf_getdata(scn, NULL);
 	if (!scn || !data) {
 		pr_warn("failed to get Elf_Data from map section %d (%s)\n",
-			obj->efile.maps_shndx, MAPS_ELF_SEC);
+			obj->efile.btf_maps_shndx, MAPS_ELF_SEC);
 		return -EINVAL;
 	}
 
-- 
GitLab


From fce2ff728f95b8894db14f51c9274dc56c37616f Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 5 Aug 2020 15:35:18 +0200
Subject: [PATCH 0354/1341] nl80211: fix NL80211_ATTR_HE_6GHZ_CAPABILITY usage

In nl80211_set_station(), we check NL80211_ATTR_HE_6GHZ_CAPABILITY
and then use NL80211_ATTR_HE_CAPABILITY, which is clearly wrong.
Fix this to use NL80211_ATTR_HE_6GHZ_CAPABILITY as well.

Cc: stable@vger.kernel.org
Fixes: 43e64bf301fd ("cfg80211: handle 6 GHz capability of new station")
Link: https://lore.kernel.org/r/20200805153516.310cef625955.I0abc04dc8abb2c7c005c88ef8fa2d0e3c9fb95c4@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/nl80211.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c04fc6cf65838..19dc0ee807f64 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -6011,7 +6011,7 @@ static int nl80211_set_station(struct sk_buff *skb, struct genl_info *info)
 
 	if (info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY])
 		params.he_6ghz_capa =
-			nla_data(info->attrs[NL80211_ATTR_HE_CAPABILITY]);
+			nla_data(info->attrs[NL80211_ATTR_HE_6GHZ_CAPABILITY]);
 
 	if (info->attrs[NL80211_ATTR_AIRTIME_WEIGHT])
 		params.airtime_weight =
-- 
GitLab


From 68528d937dcd675e79973061c1a314db598162d1 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Thu, 20 Aug 2020 14:12:33 +0100
Subject: [PATCH 0355/1341] rxrpc: Keep the ACK serial in a var in
 rxrpc_input_ack()

Keep the ACK serial number in a variable in rxrpc_input_ack() as it's used
frequently.

Signed-off-by: David Howells <dhowells@redhat.com>
---
 net/rxrpc/input.c | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 767579328a069..a7699e56eac88 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -843,7 +843,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
 		struct rxrpc_ackinfo info;
 		u8 acks[RXRPC_MAXACKS];
 	} buf;
-	rxrpc_serial_t acked_serial;
+	rxrpc_serial_t ack_serial, acked_serial;
 	rxrpc_seq_t first_soft_ack, hard_ack, prev_pkt;
 	int nr_acks, offset, ioffset;
 
@@ -856,6 +856,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
 	}
 	offset += sizeof(buf.ack);
 
+	ack_serial = sp->hdr.serial;
 	acked_serial = ntohl(buf.ack.serial);
 	first_soft_ack = ntohl(buf.ack.firstPacket);
 	prev_pkt = ntohl(buf.ack.previousPacket);
@@ -864,31 +865,31 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
 	summary.ack_reason = (buf.ack.reason < RXRPC_ACK__INVALID ?
 			      buf.ack.reason : RXRPC_ACK__INVALID);
 
-	trace_rxrpc_rx_ack(call, sp->hdr.serial, acked_serial,
+	trace_rxrpc_rx_ack(call, ack_serial, acked_serial,
 			   first_soft_ack, prev_pkt,
 			   summary.ack_reason, nr_acks);
 
 	if (buf.ack.reason == RXRPC_ACK_PING_RESPONSE)
 		rxrpc_input_ping_response(call, skb->tstamp, acked_serial,
-					  sp->hdr.serial);
+					  ack_serial);
 	if (buf.ack.reason == RXRPC_ACK_REQUESTED)
 		rxrpc_input_requested_ack(call, skb->tstamp, acked_serial,
-					  sp->hdr.serial);
+					  ack_serial);
 
 	if (buf.ack.reason == RXRPC_ACK_PING) {
-		_proto("Rx ACK %%%u PING Request", sp->hdr.serial);
+		_proto("Rx ACK %%%u PING Request", ack_serial);
 		rxrpc_propose_ACK(call, RXRPC_ACK_PING_RESPONSE,
-				  sp->hdr.serial, true, true,
+				  ack_serial, true, true,
 				  rxrpc_propose_ack_respond_to_ping);
 	} else if (sp->hdr.flags & RXRPC_REQUEST_ACK) {
 		rxrpc_propose_ACK(call, RXRPC_ACK_REQUESTED,
-				  sp->hdr.serial, true, true,
+				  ack_serial, true, true,
 				  rxrpc_propose_ack_respond_to_ack);
 	}
 
 	/* Discard any out-of-order or duplicate ACKs (outside lock). */
 	if (!rxrpc_is_ack_valid(call, first_soft_ack, prev_pkt)) {
-		trace_rxrpc_rx_discard_ack(call->debug_id, sp->hdr.serial,
+		trace_rxrpc_rx_discard_ack(call->debug_id, ack_serial,
 					   first_soft_ack, call->ackr_first_seq,
 					   prev_pkt, call->ackr_prev_seq);
 		return;
@@ -904,7 +905,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
 
 	/* Discard any out-of-order or duplicate ACKs (inside lock). */
 	if (!rxrpc_is_ack_valid(call, first_soft_ack, prev_pkt)) {
-		trace_rxrpc_rx_discard_ack(call->debug_id, sp->hdr.serial,
+		trace_rxrpc_rx_discard_ack(call->debug_id, ack_serial,
 					   first_soft_ack, call->ackr_first_seq,
 					   prev_pkt, call->ackr_prev_seq);
 		goto out;
@@ -964,7 +965,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
 	    RXRPC_TX_ANNO_LAST &&
 	    summary.nr_acks == call->tx_top - hard_ack &&
 	    rxrpc_is_client_call(call))
-		rxrpc_propose_ACK(call, RXRPC_ACK_PING, sp->hdr.serial,
+		rxrpc_propose_ACK(call, RXRPC_ACK_PING, ack_serial,
 				  false, true,
 				  rxrpc_propose_ack_ping_for_lost_reply);
 
-- 
GitLab


From 4700c4d80b7bb171f6996016ef121e1508860b42 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Wed, 19 Aug 2020 23:29:16 +0100
Subject: [PATCH 0356/1341] rxrpc: Fix loss of RTT samples due to interposed
 ACK

The Rx protocol has a mechanism to help generate RTT samples that works by
a client transmitting a REQUESTED-type ACK when it receives a DATA packet
that has the REQUEST_ACK flag set.

The peer, however, may interpose other ACKs before transmitting the
REQUESTED-ACK, as can be seen in the following trace excerpt:

 rxrpc_tx_data: c=00000044 DATA d0b5ece8:00000001 00000001 q=00000001 fl=07
 rxrpc_rx_ack: c=00000044 00000001 PNG r=00000000 f=00000002 p=00000000 n=0
 rxrpc_rx_ack: c=00000044 00000002 REQ r=00000001 f=00000002 p=00000001 n=0
 ...

DATA packet 1 (q=xx) has REQUEST_ACK set (bit 1 of fl=xx).  The incoming
ping (labelled PNG) hard-acks the request DATA packet (f=xx exceeds the
sequence number of the DATA packet), causing it to be discarded from the Tx
ring.  The ACK that was requested (labelled REQ, r=xx references the serial
of the DATA packet) comes after the ping, but the sk_buff holding the
timestamp has gone and the RTT sample is lost.

This is particularly noticeable on RPC calls used to probe the service
offered by the peer.  A lot of peers end up with an unknown RTT because we
only ever sent a single RPC.  This confuses the server rotation algorithm.

Fix this by caching the information about the outgoing packet in RTT
calculations in the rxrpc_call struct rather than looking in the Tx ring.

A four-deep buffer is maintained and both REQUEST_ACK-flagged DATA and
PING-ACK transmissions are recorded in there.  When the appropriate
response ACK is received, the buffer is checked for a match and, if found,
an RTT sample is recorded.

If a received ACK refers to a packet with a later serial number than an
entry in the cache, that entry is presumed lost and the entry is made
available to record a new transmission.

ACKs types other than REQUESTED-type and PING-type cause any matching
sample to be cancelled as they don't necessarily represent a useful
measurement.

If there's no space in the buffer on ping/data transmission, the sample
base is discarded.

Fixes: 50235c4b5a2f ("rxrpc: Obtain RTT data by requesting ACKs on DATA packets")
Signed-off-by: David Howells <dhowells@redhat.com>
---
 include/trace/events/rxrpc.h |  27 +++++++--
 net/rxrpc/ar-internal.h      |  13 +++--
 net/rxrpc/call_object.c      |   1 +
 net/rxrpc/input.c            | 104 ++++++++++++++++++++---------------
 net/rxrpc/output.c           |  82 ++++++++++++++++++++-------
 net/rxrpc/rtt.c              |   3 +-
 6 files changed, 154 insertions(+), 76 deletions(-)

diff --git a/include/trace/events/rxrpc.h b/include/trace/events/rxrpc.h
index 059b6e45a0283..c33079b986e86 100644
--- a/include/trace/events/rxrpc.h
+++ b/include/trace/events/rxrpc.h
@@ -138,11 +138,16 @@ enum rxrpc_recvmsg_trace {
 };
 
 enum rxrpc_rtt_tx_trace {
+	rxrpc_rtt_tx_cancel,
 	rxrpc_rtt_tx_data,
+	rxrpc_rtt_tx_no_slot,
 	rxrpc_rtt_tx_ping,
 };
 
 enum rxrpc_rtt_rx_trace {
+	rxrpc_rtt_rx_cancel,
+	rxrpc_rtt_rx_lost,
+	rxrpc_rtt_rx_obsolete,
 	rxrpc_rtt_rx_ping_response,
 	rxrpc_rtt_rx_requested_ack,
 };
@@ -339,10 +344,15 @@ enum rxrpc_tx_point {
 	E_(rxrpc_recvmsg_wait,			"WAIT")
 
 #define rxrpc_rtt_tx_traces \
+	EM(rxrpc_rtt_tx_cancel,			"CNCE") \
 	EM(rxrpc_rtt_tx_data,			"DATA") \
+	EM(rxrpc_rtt_tx_no_slot,		"FULL") \
 	E_(rxrpc_rtt_tx_ping,			"PING")
 
 #define rxrpc_rtt_rx_traces \
+	EM(rxrpc_rtt_rx_cancel,			"CNCL") \
+	EM(rxrpc_rtt_rx_obsolete,		"OBSL") \
+	EM(rxrpc_rtt_rx_lost,			"LOST") \
 	EM(rxrpc_rtt_rx_ping_response,		"PONG") \
 	E_(rxrpc_rtt_rx_requested_ack,		"RACK")
 
@@ -1087,38 +1097,43 @@ TRACE_EVENT(rxrpc_recvmsg,
 
 TRACE_EVENT(rxrpc_rtt_tx,
 	    TP_PROTO(struct rxrpc_call *call, enum rxrpc_rtt_tx_trace why,
-		     rxrpc_serial_t send_serial),
+		     int slot, rxrpc_serial_t send_serial),
 
-	    TP_ARGS(call, why, send_serial),
+	    TP_ARGS(call, why, slot, send_serial),
 
 	    TP_STRUCT__entry(
 		    __field(unsigned int,		call		)
 		    __field(enum rxrpc_rtt_tx_trace,	why		)
+		    __field(int,			slot		)
 		    __field(rxrpc_serial_t,		send_serial	)
 			     ),
 
 	    TP_fast_assign(
 		    __entry->call = call->debug_id;
 		    __entry->why = why;
+		    __entry->slot = slot;
 		    __entry->send_serial = send_serial;
 			   ),
 
-	    TP_printk("c=%08x %s sr=%08x",
+	    TP_printk("c=%08x [%d] %s sr=%08x",
 		      __entry->call,
+		      __entry->slot,
 		      __print_symbolic(__entry->why, rxrpc_rtt_tx_traces),
 		      __entry->send_serial)
 	    );
 
 TRACE_EVENT(rxrpc_rtt_rx,
 	    TP_PROTO(struct rxrpc_call *call, enum rxrpc_rtt_rx_trace why,
+		     int slot,
 		     rxrpc_serial_t send_serial, rxrpc_serial_t resp_serial,
 		     u32 rtt, u32 rto),
 
-	    TP_ARGS(call, why, send_serial, resp_serial, rtt, rto),
+	    TP_ARGS(call, why, slot, send_serial, resp_serial, rtt, rto),
 
 	    TP_STRUCT__entry(
 		    __field(unsigned int,		call		)
 		    __field(enum rxrpc_rtt_rx_trace,	why		)
+		    __field(int,			slot		)
 		    __field(rxrpc_serial_t,		send_serial	)
 		    __field(rxrpc_serial_t,		resp_serial	)
 		    __field(u32,			rtt		)
@@ -1128,14 +1143,16 @@ TRACE_EVENT(rxrpc_rtt_rx,
 	    TP_fast_assign(
 		    __entry->call = call->debug_id;
 		    __entry->why = why;
+		    __entry->slot = slot;
 		    __entry->send_serial = send_serial;
 		    __entry->resp_serial = resp_serial;
 		    __entry->rtt = rtt;
 		    __entry->rto = rto;
 			   ),
 
-	    TP_printk("c=%08x %s sr=%08x rr=%08x rtt=%u rto=%u",
+	    TP_printk("c=%08x [%d] %s sr=%08x rr=%08x rtt=%u rto=%u",
 		      __entry->call,
+		      __entry->slot,
 		      __print_symbolic(__entry->why, rxrpc_rtt_rx_traces),
 		      __entry->send_serial,
 		      __entry->resp_serial,
diff --git a/net/rxrpc/ar-internal.h b/net/rxrpc/ar-internal.h
index 6d29a3603a3e6..884cff7bb169a 100644
--- a/net/rxrpc/ar-internal.h
+++ b/net/rxrpc/ar-internal.h
@@ -488,7 +488,6 @@ enum rxrpc_call_flag {
 	RXRPC_CALL_RX_LAST,		/* Received the last packet (at rxtx_top) */
 	RXRPC_CALL_TX_LAST,		/* Last packet in Tx buffer (at rxtx_top) */
 	RXRPC_CALL_SEND_PING,		/* A ping will need to be sent */
-	RXRPC_CALL_PINGING,		/* Ping in process */
 	RXRPC_CALL_RETRANS_TIMEOUT,	/* Retransmission due to timeout occurred */
 	RXRPC_CALL_BEGAN_RX_TIMER,	/* We began the expect_rx_by timer */
 	RXRPC_CALL_RX_HEARD,		/* The peer responded at least once to this call */
@@ -673,9 +672,13 @@ struct rxrpc_call {
 	rxrpc_seq_t		ackr_consumed;	/* Highest packet shown consumed */
 	rxrpc_seq_t		ackr_seen;	/* Highest packet shown seen */
 
-	/* ping management */
-	rxrpc_serial_t		ping_serial;	/* Last ping sent */
-	ktime_t			ping_time;	/* Time last ping sent */
+	/* RTT management */
+	rxrpc_serial_t		rtt_serial[4];	/* Serial number of DATA or PING sent */
+	ktime_t			rtt_sent_at[4];	/* Time packet sent */
+	unsigned long		rtt_avail;	/* Mask of available slots in bits 0-3,
+						 * Mask of pending samples in 8-11 */
+#define RXRPC_CALL_RTT_AVAIL_MASK	0xf
+#define RXRPC_CALL_RTT_PEND_SHIFT	8
 
 	/* transmission-phase ACK management */
 	ktime_t			acks_latest_ts;	/* Timestamp of latest ACK received */
@@ -1037,7 +1040,7 @@ static inline bool __rxrpc_abort_eproto(struct rxrpc_call *call,
 /*
  * rtt.c
  */
-void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace,
+void rxrpc_peer_add_rtt(struct rxrpc_call *, enum rxrpc_rtt_rx_trace, int,
 			rxrpc_serial_t, rxrpc_serial_t, ktime_t, ktime_t);
 unsigned long rxrpc_get_rto_backoff(struct rxrpc_peer *, bool);
 void rxrpc_peer_init_rtt(struct rxrpc_peer *);
diff --git a/net/rxrpc/call_object.c b/net/rxrpc/call_object.c
index 38a46167523fa..a40fae0139423 100644
--- a/net/rxrpc/call_object.c
+++ b/net/rxrpc/call_object.c
@@ -153,6 +153,7 @@ struct rxrpc_call *rxrpc_alloc_call(struct rxrpc_sock *rx, gfp_t gfp,
 	call->cong_ssthresh = RXRPC_RXTX_BUFF_SIZE - 1;
 
 	call->rxnet = rxnet;
+	call->rtt_avail = RXRPC_CALL_RTT_AVAIL_MASK;
 	atomic_inc(&rxnet->nr_calls);
 	return call;
 
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index a7699e56eac88..19ddfc9807e89 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -608,36 +608,57 @@ static void rxrpc_input_data(struct rxrpc_call *call, struct sk_buff *skb)
 }
 
 /*
- * Process a requested ACK.
+ * See if there's a cached RTT probe to complete.
  */
-static void rxrpc_input_requested_ack(struct rxrpc_call *call,
-				      ktime_t resp_time,
-				      rxrpc_serial_t orig_serial,
-				      rxrpc_serial_t ack_serial)
+static void rxrpc_complete_rtt_probe(struct rxrpc_call *call,
+				     ktime_t resp_time,
+				     rxrpc_serial_t acked_serial,
+				     rxrpc_serial_t ack_serial,
+				     enum rxrpc_rtt_rx_trace type)
 {
-	struct rxrpc_skb_priv *sp;
-	struct sk_buff *skb;
+	rxrpc_serial_t orig_serial;
+	unsigned long avail;
 	ktime_t sent_at;
-	int ix;
+	bool matched = false;
+	int i;
 
-	for (ix = 0; ix < RXRPC_RXTX_BUFF_SIZE; ix++) {
-		skb = call->rxtx_buffer[ix];
-		if (!skb)
-			continue;
+	avail = READ_ONCE(call->rtt_avail);
+	smp_rmb(); /* Read avail bits before accessing data. */
 
-		sent_at = skb->tstamp;
-		smp_rmb(); /* Read timestamp before serial. */
-		sp = rxrpc_skb(skb);
-		if (sp->hdr.serial != orig_serial)
+	for (i = 0; i < ARRAY_SIZE(call->rtt_serial); i++) {
+		if (!test_bit(i + RXRPC_CALL_RTT_PEND_SHIFT, &avail))
 			continue;
-		goto found;
-	}
 
-	return;
+		sent_at = call->rtt_sent_at[i];
+		orig_serial = call->rtt_serial[i];
+
+		if (orig_serial == acked_serial) {
+			clear_bit(i + RXRPC_CALL_RTT_PEND_SHIFT, &call->rtt_avail);
+			smp_mb(); /* Read data before setting avail bit */
+			set_bit(i, &call->rtt_avail);
+			if (type != rxrpc_rtt_rx_cancel)
+				rxrpc_peer_add_rtt(call, type, i, acked_serial, ack_serial,
+						   sent_at, resp_time);
+			else
+				trace_rxrpc_rtt_rx(call, rxrpc_rtt_rx_cancel, i,
+						   orig_serial, acked_serial, 0, 0);
+			matched = true;
+		}
+
+		/* If a later serial is being acked, then mark this slot as
+		 * being available.
+		 */
+		if (after(acked_serial, orig_serial)) {
+			trace_rxrpc_rtt_rx(call, rxrpc_rtt_rx_obsolete, i,
+					   orig_serial, acked_serial, 0, 0);
+			clear_bit(i + RXRPC_CALL_RTT_PEND_SHIFT, &call->rtt_avail);
+			smp_wmb();
+			set_bit(i, &call->rtt_avail);
+		}
+	}
 
-found:
-	rxrpc_peer_add_rtt(call, rxrpc_rtt_rx_requested_ack,
-			   orig_serial, ack_serial, sent_at, resp_time);
+	if (!matched)
+		trace_rxrpc_rtt_rx(call, rxrpc_rtt_rx_lost, 9, 0, acked_serial, 0, 0);
 }
 
 /*
@@ -682,27 +703,11 @@ static void rxrpc_input_check_for_lost_ack(struct rxrpc_call *call)
  */
 static void rxrpc_input_ping_response(struct rxrpc_call *call,
 				      ktime_t resp_time,
-				      rxrpc_serial_t orig_serial,
+				      rxrpc_serial_t acked_serial,
 				      rxrpc_serial_t ack_serial)
 {
-	rxrpc_serial_t ping_serial;
-	ktime_t ping_time;
-
-	ping_time = call->ping_time;
-	smp_rmb();
-	ping_serial = READ_ONCE(call->ping_serial);
-
-	if (orig_serial == call->acks_lost_ping)
+	if (acked_serial == call->acks_lost_ping)
 		rxrpc_input_check_for_lost_ack(call);
-
-	if (before(orig_serial, ping_serial) ||
-	    !test_and_clear_bit(RXRPC_CALL_PINGING, &call->flags))
-		return;
-	if (after(orig_serial, ping_serial))
-		return;
-
-	rxrpc_peer_add_rtt(call, rxrpc_rtt_rx_ping_response,
-			   orig_serial, ack_serial, ping_time, resp_time);
 }
 
 /*
@@ -869,12 +874,23 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
 			   first_soft_ack, prev_pkt,
 			   summary.ack_reason, nr_acks);
 
-	if (buf.ack.reason == RXRPC_ACK_PING_RESPONSE)
+	switch (buf.ack.reason) {
+	case RXRPC_ACK_PING_RESPONSE:
 		rxrpc_input_ping_response(call, skb->tstamp, acked_serial,
 					  ack_serial);
-	if (buf.ack.reason == RXRPC_ACK_REQUESTED)
-		rxrpc_input_requested_ack(call, skb->tstamp, acked_serial,
-					  ack_serial);
+		rxrpc_complete_rtt_probe(call, skb->tstamp, acked_serial, ack_serial,
+					 rxrpc_rtt_rx_ping_response);
+		break;
+	case RXRPC_ACK_REQUESTED:
+		rxrpc_complete_rtt_probe(call, skb->tstamp, acked_serial, ack_serial,
+					 rxrpc_rtt_rx_requested_ack);
+		break;
+	default:
+		if (acked_serial != 0)
+			rxrpc_complete_rtt_probe(call, skb->tstamp, acked_serial, ack_serial,
+						 rxrpc_rtt_rx_cancel);
+		break;
+	}
 
 	if (buf.ack.reason == RXRPC_ACK_PING) {
 		_proto("Rx ACK %%%u PING Request", ack_serial);
diff --git a/net/rxrpc/output.c b/net/rxrpc/output.c
index 1ba43c3df4adb..3cfff7922ba82 100644
--- a/net/rxrpc/output.c
+++ b/net/rxrpc/output.c
@@ -123,6 +123,49 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_connection *conn,
 	return top - hard_ack + 3;
 }
 
+/*
+ * Record the beginning of an RTT probe.
+ */
+static int rxrpc_begin_rtt_probe(struct rxrpc_call *call, rxrpc_serial_t serial,
+				 enum rxrpc_rtt_tx_trace why)
+{
+	unsigned long avail = call->rtt_avail;
+	int rtt_slot = 9;
+
+	if (!(avail & RXRPC_CALL_RTT_AVAIL_MASK))
+		goto no_slot;
+
+	rtt_slot = __ffs(avail & RXRPC_CALL_RTT_AVAIL_MASK);
+	if (!test_and_clear_bit(rtt_slot, &call->rtt_avail))
+		goto no_slot;
+
+	call->rtt_serial[rtt_slot] = serial;
+	call->rtt_sent_at[rtt_slot] = ktime_get_real();
+	smp_wmb(); /* Write data before avail bit */
+	set_bit(rtt_slot + RXRPC_CALL_RTT_PEND_SHIFT, &call->rtt_avail);
+
+	trace_rxrpc_rtt_tx(call, why, rtt_slot, serial);
+	return rtt_slot;
+
+no_slot:
+	trace_rxrpc_rtt_tx(call, rxrpc_rtt_tx_no_slot, rtt_slot, serial);
+	return -1;
+}
+
+/*
+ * Cancel an RTT probe.
+ */
+static void rxrpc_cancel_rtt_probe(struct rxrpc_call *call,
+				   rxrpc_serial_t serial, int rtt_slot)
+{
+	if (rtt_slot != -1) {
+		clear_bit(rtt_slot + RXRPC_CALL_RTT_PEND_SHIFT, &call->rtt_avail);
+		smp_wmb(); /* Clear pending bit before setting slot */
+		set_bit(rtt_slot, &call->rtt_avail);
+		trace_rxrpc_rtt_tx(call, rxrpc_rtt_tx_cancel, rtt_slot, serial);
+	}
+}
+
 /*
  * Send an ACK call packet.
  */
@@ -136,7 +179,7 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping,
 	rxrpc_serial_t serial;
 	rxrpc_seq_t hard_ack, top;
 	size_t len, n;
-	int ret;
+	int ret, rtt_slot = -1;
 	u8 reason;
 
 	if (test_bit(RXRPC_CALL_DISCONNECTED, &call->flags))
@@ -196,18 +239,8 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping,
 	if (_serial)
 		*_serial = serial;
 
-	if (ping) {
-		call->ping_serial = serial;
-		smp_wmb();
-		/* We need to stick a time in before we send the packet in case
-		 * the reply gets back before kernel_sendmsg() completes - but
-		 * asking UDP to send the packet can take a relatively long
-		 * time.
-		 */
-		call->ping_time = ktime_get_real();
-		set_bit(RXRPC_CALL_PINGING, &call->flags);
-		trace_rxrpc_rtt_tx(call, rxrpc_rtt_tx_ping, serial);
-	}
+	if (ping)
+		rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_ping);
 
 	ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len);
 	conn->params.peer->last_tx_at = ktime_get_seconds();
@@ -221,8 +254,7 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping,
 
 	if (call->state < RXRPC_CALL_COMPLETE) {
 		if (ret < 0) {
-			if (ping)
-				clear_bit(RXRPC_CALL_PINGING, &call->flags);
+			rxrpc_cancel_rtt_probe(call, serial, rtt_slot);
 			rxrpc_propose_ACK(call, pkt->ack.reason,
 					  ntohl(pkt->ack.serial),
 					  false, true,
@@ -321,7 +353,7 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
 	struct kvec iov[2];
 	rxrpc_serial_t serial;
 	size_t len;
-	int ret;
+	int ret, rtt_slot = -1;
 
 	_enter(",{%d}", skb->len);
 
@@ -397,6 +429,8 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
 	sp->hdr.serial = serial;
 	smp_wmb(); /* Set serial before timestamp */
 	skb->tstamp = ktime_get_real();
+	if (whdr.flags & RXRPC_REQUEST_ACK)
+		rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_data);
 
 	/* send the packet by UDP
 	 * - returns -EMSGSIZE if UDP would have to fragment the packet
@@ -408,12 +442,15 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
 	conn->params.peer->last_tx_at = ktime_get_seconds();
 
 	up_read(&conn->params.local->defrag_sem);
-	if (ret < 0)
+	if (ret < 0) {
+		rxrpc_cancel_rtt_probe(call, serial, rtt_slot);
 		trace_rxrpc_tx_fail(call->debug_id, serial, ret,
 				    rxrpc_tx_point_call_data_nofrag);
-	else
+	} else {
 		trace_rxrpc_tx_packet(call->debug_id, &whdr,
 				      rxrpc_tx_point_call_data_nofrag);
+	}
+
 	rxrpc_tx_backoff(call, ret);
 	if (ret == -EMSGSIZE)
 		goto send_fragmentable;
@@ -422,7 +459,6 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
 	if (ret >= 0) {
 		if (whdr.flags & RXRPC_REQUEST_ACK) {
 			call->peer->rtt_last_req = skb->tstamp;
-			trace_rxrpc_rtt_tx(call, rxrpc_rtt_tx_data, serial);
 			if (call->peer->rtt_count > 1) {
 				unsigned long nowj = jiffies, ack_lost_at;
 
@@ -469,6 +505,8 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
 	sp->hdr.serial = serial;
 	smp_wmb(); /* Set serial before timestamp */
 	skb->tstamp = ktime_get_real();
+	if (whdr.flags & RXRPC_REQUEST_ACK)
+		rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_data);
 
 	switch (conn->params.local->srx.transport.family) {
 	case AF_INET6:
@@ -487,12 +525,14 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
 		BUG();
 	}
 
-	if (ret < 0)
+	if (ret < 0) {
+		rxrpc_cancel_rtt_probe(call, serial, rtt_slot);
 		trace_rxrpc_tx_fail(call->debug_id, serial, ret,
 				    rxrpc_tx_point_call_data_frag);
-	else
+	} else {
 		trace_rxrpc_tx_packet(call->debug_id, &whdr,
 				      rxrpc_tx_point_call_data_frag);
+	}
 	rxrpc_tx_backoff(call, ret);
 
 	up_write(&conn->params.local->defrag_sem);
diff --git a/net/rxrpc/rtt.c b/net/rxrpc/rtt.c
index 928d8b34a3eee..1221b0637a7ec 100644
--- a/net/rxrpc/rtt.c
+++ b/net/rxrpc/rtt.c
@@ -146,6 +146,7 @@ static void rxrpc_ack_update_rtt(struct rxrpc_peer *peer, long rtt_us)
  * exclusive access to the peer RTT data.
  */
 void rxrpc_peer_add_rtt(struct rxrpc_call *call, enum rxrpc_rtt_rx_trace why,
+			int rtt_slot,
 			rxrpc_serial_t send_serial, rxrpc_serial_t resp_serial,
 			ktime_t send_time, ktime_t resp_time)
 {
@@ -162,7 +163,7 @@ void rxrpc_peer_add_rtt(struct rxrpc_call *call, enum rxrpc_rtt_rx_trace why,
 		peer->rtt_count++;
 	spin_unlock(&peer->rtt_input_lock);
 
-	trace_rxrpc_rtt_rx(call, why, send_serial, resp_serial,
+	trace_rxrpc_rtt_rx(call, why, rtt_slot, send_serial, resp_serial,
 			   peer->srtt_us >> 3, peer->rto_j);
 }
 
-- 
GitLab


From 1d4adfaf65746203861c72d9d78de349eb97d528 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Thu, 20 Aug 2020 15:13:00 +0100
Subject: [PATCH 0357/1341] rxrpc: Make rxrpc_kernel_get_srtt() indicate
 validity

Fix rxrpc_kernel_get_srtt() to indicate the validity of the returned
smoothed RTT.  If we haven't had any valid samples yet, the SRTT isn't
useful.

Fixes: c410bf01933e ("rxrpc: Fix the excessive initial retransmission timeout")
Signed-off-by: David Howells <dhowells@redhat.com>
---
 fs/afs/fs_probe.c       |  4 ++--
 fs/afs/vl_probe.c       |  4 ++--
 include/net/af_rxrpc.h  |  2 +-
 net/rxrpc/peer_object.c | 16 +++++++++++++---
 4 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/fs/afs/fs_probe.c b/fs/afs/fs_probe.c
index 5d9ef517cf816..e7e98ad63a91a 100644
--- a/fs/afs/fs_probe.c
+++ b/fs/afs/fs_probe.c
@@ -161,8 +161,8 @@ void afs_fileserver_probe_result(struct afs_call *call)
 		}
 	}
 
-	rtt_us = rxrpc_kernel_get_srtt(call->net->socket, call->rxcall);
-	if (rtt_us < server->probe.rtt) {
+	if (rxrpc_kernel_get_srtt(call->net->socket, call->rxcall, &rtt_us) &&
+	    rtt_us < server->probe.rtt) {
 		server->probe.rtt = rtt_us;
 		server->rtt = rtt_us;
 		alist->preferred = index;
diff --git a/fs/afs/vl_probe.c b/fs/afs/vl_probe.c
index e3aa013c21779..081b7e5b13f58 100644
--- a/fs/afs/vl_probe.c
+++ b/fs/afs/vl_probe.c
@@ -92,8 +92,8 @@ void afs_vlserver_probe_result(struct afs_call *call)
 		}
 	}
 
-	rtt_us = rxrpc_kernel_get_srtt(call->net->socket, call->rxcall);
-	if (rtt_us < server->probe.rtt) {
+	if (rxrpc_kernel_get_srtt(call->net->socket, call->rxcall, &rtt_us) &&
+	    rtt_us < server->probe.rtt) {
 		server->probe.rtt = rtt_us;
 		alist->preferred = index;
 		have_result = true;
diff --git a/include/net/af_rxrpc.h b/include/net/af_rxrpc.h
index 91eacbdcf33d2..f6abcc0bbd6e7 100644
--- a/include/net/af_rxrpc.h
+++ b/include/net/af_rxrpc.h
@@ -59,7 +59,7 @@ bool rxrpc_kernel_abort_call(struct socket *, struct rxrpc_call *,
 void rxrpc_kernel_end_call(struct socket *, struct rxrpc_call *);
 void rxrpc_kernel_get_peer(struct socket *, struct rxrpc_call *,
 			   struct sockaddr_rxrpc *);
-u32 rxrpc_kernel_get_srtt(struct socket *, struct rxrpc_call *);
+bool rxrpc_kernel_get_srtt(struct socket *, struct rxrpc_call *, u32 *);
 int rxrpc_kernel_charge_accept(struct socket *, rxrpc_notify_rx_t,
 			       rxrpc_user_attach_call_t, unsigned long, gfp_t,
 			       unsigned int);
diff --git a/net/rxrpc/peer_object.c b/net/rxrpc/peer_object.c
index ca29976bb193e..68396d0520525 100644
--- a/net/rxrpc/peer_object.c
+++ b/net/rxrpc/peer_object.c
@@ -502,11 +502,21 @@ EXPORT_SYMBOL(rxrpc_kernel_get_peer);
  * rxrpc_kernel_get_srtt - Get a call's peer smoothed RTT
  * @sock: The socket on which the call is in progress.
  * @call: The call to query
+ * @_srtt: Where to store the SRTT value.
  *
- * Get the call's peer smoothed RTT.
+ * Get the call's peer smoothed RTT in uS.
  */
-u32 rxrpc_kernel_get_srtt(struct socket *sock, struct rxrpc_call *call)
+bool rxrpc_kernel_get_srtt(struct socket *sock, struct rxrpc_call *call,
+			   u32 *_srtt)
 {
-	return call->peer->srtt_us >> 3;
+	struct rxrpc_peer *peer = call->peer;
+
+	if (peer->rtt_count == 0) {
+		*_srtt = 1000000; /* 1S */
+		return false;
+	}
+
+	*_srtt = call->peer->srtt_us >> 3;
+	return true;
 }
 EXPORT_SYMBOL(rxrpc_kernel_get_srtt);
-- 
GitLab


From 4f4c2c05eb7703b485b4285b8e2eee908c7b4508 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Wed, 19 Aug 2020 15:13:44 +0100
Subject: [PATCH 0358/1341] afs: Remove afs_vlserver->probe.have_result

Remove afs_vlserver->probe.have_result as it's neither read nor waited
upon.

Fixes: 3bf0fb6f33dd ("afs: Probe multiple fileservers simultaneously")
Signed-off-by: David Howells <dhowells@redhat.com>
---
 fs/afs/internal.h | 1 -
 fs/afs/vl_probe.c | 5 +----
 2 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 792ac711985eb..2e6ae6388c727 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -412,7 +412,6 @@ struct afs_vlserver {
 		unsigned int	rtt;		/* RTT as ktime/64 */
 		u32		abort_code;
 		short		error;
-		bool		have_result;
 		bool		responded:1;
 		bool		is_yfs:1;
 		bool		not_yfs:1;
diff --git a/fs/afs/vl_probe.c b/fs/afs/vl_probe.c
index 081b7e5b13f58..ee59188433b95 100644
--- a/fs/afs/vl_probe.c
+++ b/fs/afs/vl_probe.c
@@ -109,11 +109,8 @@ void afs_vlserver_probe_result(struct afs_call *call)
 	       server_index, index, &alist->addrs[index].transport, rtt_us, ret);
 
 	have_result |= afs_vl_probe_done(server);
-	if (have_result) {
-		server->probe.have_result = true;
-		wake_up_var(&server->probe.have_result);
+	if (have_result)
 		wake_up_all(&server->probe_wq);
-	}
 }
 
 /*
-- 
GitLab


From fb72cd3d484ce548597c75ebeecc70483fe8bb6e Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Thu, 20 Aug 2020 15:01:54 +0100
Subject: [PATCH 0359/1341] afs: Expose information from afs_vlserver through
 /proc for debugging

Convert various bitfields in afs_vlserver::probe to a mask and then expose
this and some other bits of information through /proc/net/afs/<cell>/vlservers
to make it easier to debug VL server communication issues.

Signed-off-by: David Howells <dhowells@redhat.com>
---
 fs/afs/internal.h  |  9 +++++----
 fs/afs/proc.c      |  5 +++++
 fs/afs/vl_probe.c  | 20 ++++++++++----------
 fs/afs/vl_rotate.c |  3 ++-
 4 files changed, 22 insertions(+), 15 deletions(-)

diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 2e6ae6388c727..b29dfcfe5fc2f 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -412,10 +412,11 @@ struct afs_vlserver {
 		unsigned int	rtt;		/* RTT as ktime/64 */
 		u32		abort_code;
 		short		error;
-		bool		responded:1;
-		bool		is_yfs:1;
-		bool		not_yfs:1;
-		bool		local_failure:1;
+		unsigned short	flags;
+#define AFS_VLSERVER_PROBE_RESPONDED		0x01 /* At least once response (may be abort) */
+#define AFS_VLSERVER_PROBE_IS_YFS		0x02 /* The peer appears to be YFS */
+#define AFS_VLSERVER_PROBE_NOT_YFS		0x04 /* The peer appears not to be YFS */
+#define AFS_VLSERVER_PROBE_LOCAL_FAILURE	0x08 /* A local failure prevented a probe */
 	} probe;
 
 	u16			port;
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index e817fc740ba01..5e837155f1a08 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -310,6 +310,11 @@ static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
 				   alist->preferred == i ? '>' : '-',
 				   &alist->addrs[i].transport);
 	}
+	seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->probe.rtt);
+	seq_printf(m, " probe: fl=%x e=%d ac=%d out=%d\n",
+		   vlserver->probe.flags, vlserver->probe.error,
+		   vlserver->probe.abort_code,
+		   atomic_read(&vlserver->probe_outstanding));
 	return 0;
 }
 
diff --git a/fs/afs/vl_probe.c b/fs/afs/vl_probe.c
index ee59188433b95..a6d04b4fbf560 100644
--- a/fs/afs/vl_probe.c
+++ b/fs/afs/vl_probe.c
@@ -45,14 +45,14 @@ void afs_vlserver_probe_result(struct afs_call *call)
 		server->probe.error = 0;
 		goto responded;
 	case -ECONNABORTED:
-		if (!server->probe.responded) {
+		if (!(server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED)) {
 			server->probe.abort_code = call->abort_code;
 			server->probe.error = ret;
 		}
 		goto responded;
 	case -ENOMEM:
 	case -ENONET:
-		server->probe.local_failure = true;
+		server->probe.flags |= AFS_VLSERVER_PROBE_LOCAL_FAILURE;
 		afs_io_error(call, afs_io_error_vl_probe_fail);
 		goto out;
 	case -ECONNRESET: /* Responded, but call expired. */
@@ -67,7 +67,7 @@ void afs_vlserver_probe_result(struct afs_call *call)
 	default:
 		clear_bit(index, &alist->responded);
 		set_bit(index, &alist->failed);
-		if (!server->probe.responded &&
+		if (!(server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED) &&
 		    (server->probe.error == 0 ||
 		     server->probe.error == -ETIMEDOUT ||
 		     server->probe.error == -ETIME))
@@ -81,12 +81,12 @@ void afs_vlserver_probe_result(struct afs_call *call)
 	clear_bit(index, &alist->failed);
 
 	if (call->service_id == YFS_VL_SERVICE) {
-		server->probe.is_yfs = true;
+		server->probe.flags |= AFS_VLSERVER_PROBE_IS_YFS;
 		set_bit(AFS_VLSERVER_FL_IS_YFS, &server->flags);
 		alist->addrs[index].srx_service = call->service_id;
 	} else {
-		server->probe.not_yfs = true;
-		if (!server->probe.is_yfs) {
+		server->probe.flags |= AFS_VLSERVER_PROBE_NOT_YFS;
+		if (!(server->probe.flags & AFS_VLSERVER_PROBE_IS_YFS)) {
 			clear_bit(AFS_VLSERVER_FL_IS_YFS, &server->flags);
 			alist->addrs[index].srx_service = call->service_id;
 		}
@@ -100,7 +100,7 @@ void afs_vlserver_probe_result(struct afs_call *call)
 	}
 
 	smp_wmb(); /* Set rtt before responded. */
-	server->probe.responded = true;
+	server->probe.flags |= AFS_VLSERVER_PROBE_RESPONDED;
 	set_bit(AFS_VLSERVER_FL_PROBED, &server->flags);
 out:
 	spin_unlock(&server->probe_lock);
@@ -202,7 +202,7 @@ int afs_wait_for_vl_probes(struct afs_vlserver_list *vllist,
 			server = vllist->servers[i].server;
 			if (!test_bit(AFS_VLSERVER_FL_PROBING, &server->flags))
 				__clear_bit(i, &untried);
-			if (server->probe.responded)
+			if (server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED)
 				have_responders = true;
 		}
 	}
@@ -228,7 +228,7 @@ int afs_wait_for_vl_probes(struct afs_vlserver_list *vllist,
 		for (i = 0; i < vllist->nr_servers; i++) {
 			if (test_bit(i, &untried)) {
 				server = vllist->servers[i].server;
-				if (server->probe.responded)
+				if (server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED)
 					goto stop;
 				if (test_bit(AFS_VLSERVER_FL_PROBING, &server->flags))
 					still_probing = true;
@@ -246,7 +246,7 @@ int afs_wait_for_vl_probes(struct afs_vlserver_list *vllist,
 	for (i = 0; i < vllist->nr_servers; i++) {
 		if (test_bit(i, &untried)) {
 			server = vllist->servers[i].server;
-			if (server->probe.responded &&
+			if ((server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED) &&
 			    server->probe.rtt < rtt) {
 				pref = i;
 				rtt = server->probe.rtt;
diff --git a/fs/afs/vl_rotate.c b/fs/afs/vl_rotate.c
index f405ca8b240a5..ed2609e826953 100644
--- a/fs/afs/vl_rotate.c
+++ b/fs/afs/vl_rotate.c
@@ -192,7 +192,8 @@ bool afs_select_vlserver(struct afs_vl_cursor *vc)
 	for (i = 0; i < vc->server_list->nr_servers; i++) {
 		struct afs_vlserver *s = vc->server_list->servers[i].server;
 
-		if (!test_bit(i, &vc->untried) || !s->probe.responded)
+		if (!test_bit(i, &vc->untried) ||
+		    !(s->probe.flags & AFS_VLSERVER_PROBE_RESPONDED))
 			continue;
 		if (s->probe.rtt < rtt) {
 			vc->index = i;
-- 
GitLab


From b95b30940ee46a4d892ca3de3ffb8249c4985b1f Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Wed, 19 Aug 2020 15:27:17 +0100
Subject: [PATCH 0360/1341] afs: Don't use VL probe running state to make
 decisions outside probe code

Don't use the running state for VL server probes to make decisions about
which server to use as the state is cleared at the start of a probe and
intermediate values might also be misleading.

Instead, add a separate 'latest known' rtt in the afs_vlserver struct and a
flag to indicate if the server is known to be responding and update these
as and when we know what to change them to.

Fixes: 3bf0fb6f33dd ("afs: Probe multiple fileservers simultaneously")
Signed-off-by: David Howells <dhowells@redhat.com>
---
 fs/afs/internal.h  |  4 +++-
 fs/afs/proc.c      |  2 +-
 fs/afs/vl_list.c   |  1 +
 fs/afs/vl_probe.c  | 57 ++++++++++++++++++++++++++++++++--------------
 fs/afs/vl_rotate.c |  2 +-
 5 files changed, 46 insertions(+), 20 deletions(-)

diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index b29dfcfe5fc2f..18042b7dab6a8 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -401,15 +401,17 @@ struct afs_vlserver {
 #define AFS_VLSERVER_FL_PROBED	0		/* The VL server has been probed */
 #define AFS_VLSERVER_FL_PROBING	1		/* VL server is being probed */
 #define AFS_VLSERVER_FL_IS_YFS	2		/* Server is YFS not AFS */
+#define AFS_VLSERVER_FL_RESPONDING 3		/* VL server is responding */
 	rwlock_t		lock;		/* Lock on addresses */
 	atomic_t		usage;
+	unsigned int		rtt;		/* Server's current RTT in uS */
 
 	/* Probe state */
 	wait_queue_head_t	probe_wq;
 	atomic_t		probe_outstanding;
 	spinlock_t		probe_lock;
 	struct {
-		unsigned int	rtt;		/* RTT as ktime/64 */
+		unsigned int	rtt;		/* RTT in uS */
 		u32		abort_code;
 		short		error;
 		unsigned short	flags;
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index 5e837155f1a08..e8babb62ed442 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -310,7 +310,7 @@ static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
 				   alist->preferred == i ? '>' : '-',
 				   &alist->addrs[i].transport);
 	}
-	seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->probe.rtt);
+	seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->rtt);
 	seq_printf(m, " probe: fl=%x e=%d ac=%d out=%d\n",
 		   vlserver->probe.flags, vlserver->probe.error,
 		   vlserver->probe.abort_code,
diff --git a/fs/afs/vl_list.c b/fs/afs/vl_list.c
index 8fea54eba0c2b..38b2ba1d9ec0d 100644
--- a/fs/afs/vl_list.c
+++ b/fs/afs/vl_list.c
@@ -21,6 +21,7 @@ struct afs_vlserver *afs_alloc_vlserver(const char *name, size_t name_len,
 		rwlock_init(&vlserver->lock);
 		init_waitqueue_head(&vlserver->probe_wq);
 		spin_lock_init(&vlserver->probe_lock);
+		vlserver->rtt = UINT_MAX;
 		vlserver->name_len = name_len;
 		vlserver->port = port;
 		memcpy(vlserver->name, name, name_len);
diff --git a/fs/afs/vl_probe.c b/fs/afs/vl_probe.c
index a6d04b4fbf560..d1c7068b4346f 100644
--- a/fs/afs/vl_probe.c
+++ b/fs/afs/vl_probe.c
@@ -11,15 +11,33 @@
 #include "internal.h"
 #include "protocol_yfs.h"
 
-static bool afs_vl_probe_done(struct afs_vlserver *server)
+
+/*
+ * Handle the completion of a set of probes.
+ */
+static void afs_finished_vl_probe(struct afs_vlserver *server)
 {
-	if (!atomic_dec_and_test(&server->probe_outstanding))
-		return false;
+	if (!(server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED)) {
+		server->rtt = UINT_MAX;
+		clear_bit(AFS_VLSERVER_FL_RESPONDING, &server->flags);
+	}
 
-	wake_up_var(&server->probe_outstanding);
 	clear_bit_unlock(AFS_VLSERVER_FL_PROBING, &server->flags);
 	wake_up_bit(&server->flags, AFS_VLSERVER_FL_PROBING);
-	return true;
+}
+
+/*
+ * Handle the completion of a probe RPC call.
+ */
+static void afs_done_one_vl_probe(struct afs_vlserver *server, bool wake_up)
+{
+	if (atomic_dec_and_test(&server->probe_outstanding)) {
+		afs_finished_vl_probe(server);
+		wake_up = true;
+	}
+
+	if (wake_up)
+		wake_up_all(&server->probe_wq);
 }
 
 /*
@@ -52,8 +70,13 @@ void afs_vlserver_probe_result(struct afs_call *call)
 		goto responded;
 	case -ENOMEM:
 	case -ENONET:
+	case -EKEYEXPIRED:
+	case -EKEYREVOKED:
+	case -EKEYREJECTED:
 		server->probe.flags |= AFS_VLSERVER_PROBE_LOCAL_FAILURE;
-		afs_io_error(call, afs_io_error_vl_probe_fail);
+		if (server->probe.error == 0)
+			server->probe.error = ret;
+		trace_afs_io_error(call->debug_id, ret, afs_io_error_vl_probe_fail);
 		goto out;
 	case -ECONNRESET: /* Responded, but call expired. */
 	case -ERFKILL:
@@ -72,7 +95,7 @@ void afs_vlserver_probe_result(struct afs_call *call)
 		     server->probe.error == -ETIMEDOUT ||
 		     server->probe.error == -ETIME))
 			server->probe.error = ret;
-		afs_io_error(call, afs_io_error_vl_probe_fail);
+		trace_afs_io_error(call->debug_id, ret, afs_io_error_vl_probe_fail);
 		goto out;
 	}
 
@@ -95,22 +118,22 @@ void afs_vlserver_probe_result(struct afs_call *call)
 	if (rxrpc_kernel_get_srtt(call->net->socket, call->rxcall, &rtt_us) &&
 	    rtt_us < server->probe.rtt) {
 		server->probe.rtt = rtt_us;
+		server->rtt = rtt_us;
 		alist->preferred = index;
-		have_result = true;
 	}
 
 	smp_wmb(); /* Set rtt before responded. */
 	server->probe.flags |= AFS_VLSERVER_PROBE_RESPONDED;
 	set_bit(AFS_VLSERVER_FL_PROBED, &server->flags);
+	set_bit(AFS_VLSERVER_FL_RESPONDING, &server->flags);
+	have_result = true;
 out:
 	spin_unlock(&server->probe_lock);
 
 	_debug("probe [%u][%u] %pISpc rtt=%u ret=%d",
 	       server_index, index, &alist->addrs[index].transport, rtt_us, ret);
 
-	have_result |= afs_vl_probe_done(server);
-	if (have_result)
-		wake_up_all(&server->probe_wq);
+	afs_done_one_vl_probe(server, have_result);
 }
 
 /*
@@ -148,11 +171,10 @@ static bool afs_do_probe_vlserver(struct afs_net *net,
 			in_progress = true;
 		} else {
 			afs_prioritise_error(_e, PTR_ERR(call), ac.abort_code);
+			afs_done_one_vl_probe(server, false);
 		}
 	}
 
-	if (!in_progress)
-		afs_vl_probe_done(server);
 	return in_progress;
 }
 
@@ -190,7 +212,7 @@ int afs_wait_for_vl_probes(struct afs_vlserver_list *vllist,
 {
 	struct wait_queue_entry *waits;
 	struct afs_vlserver *server;
-	unsigned int rtt = UINT_MAX;
+	unsigned int rtt = UINT_MAX, rtt_s;
 	bool have_responders = false;
 	int pref = -1, i;
 
@@ -246,10 +268,11 @@ int afs_wait_for_vl_probes(struct afs_vlserver_list *vllist,
 	for (i = 0; i < vllist->nr_servers; i++) {
 		if (test_bit(i, &untried)) {
 			server = vllist->servers[i].server;
-			if ((server->probe.flags & AFS_VLSERVER_PROBE_RESPONDED) &&
-			    server->probe.rtt < rtt) {
+			rtt_s = READ_ONCE(server->rtt);
+			if (test_bit(AFS_VLSERVER_FL_RESPONDING, &server->flags) &&
+			    rtt_s < rtt) {
 				pref = i;
-				rtt = server->probe.rtt;
+				rtt = rtt_s;
 			}
 
 			remove_wait_queue(&server->probe_wq, &waits[i]);
diff --git a/fs/afs/vl_rotate.c b/fs/afs/vl_rotate.c
index ed2609e826953..ab2beb4ba20ed 100644
--- a/fs/afs/vl_rotate.c
+++ b/fs/afs/vl_rotate.c
@@ -193,7 +193,7 @@ bool afs_select_vlserver(struct afs_vl_cursor *vc)
 		struct afs_vlserver *s = vc->server_list->servers[i].server;
 
 		if (!test_bit(i, &vc->untried) ||
-		    !(s->probe.flags & AFS_VLSERVER_PROBE_RESPONDED))
+		    !test_bit(AFS_VLSERVER_FL_RESPONDING, &s->flags))
 			continue;
 		if (s->probe.rtt < rtt) {
 			vc->index = i;
-- 
GitLab


From e4686c79b103c0a73b8ed41e5fd967da201b6fba Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Thu, 20 Aug 2020 16:13:05 +0100
Subject: [PATCH 0361/1341] afs: Fix error handling in VL server rotation

The error handling in the VL server rotation in the case of there being no
contactable servers is not correct.  In such a case, the records of all the
servers in the list are scanned and the errors and abort codes are mapped
and prioritised and one error is chosen.  This is then forgotten and the
default error is used (EDESTADDRREQ).

Fix this by using the calculated error.

Also we need to note whether a server responded on one of its endpoints so
that we can priorise an error from an abort message over local and network
errors.

Fixes: 4584ae96ae30 ("afs: Fix missing net error handling")
Signed-off-by: David Howells <dhowells@redhat.com>
---
 fs/afs/vl_rotate.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/afs/vl_rotate.c b/fs/afs/vl_rotate.c
index ab2beb4ba20ed..c0458c903b310 100644
--- a/fs/afs/vl_rotate.c
+++ b/fs/afs/vl_rotate.c
@@ -263,10 +263,14 @@ bool afs_select_vlserver(struct afs_vl_cursor *vc)
 	for (i = 0; i < vc->server_list->nr_servers; i++) {
 		struct afs_vlserver *s = vc->server_list->servers[i].server;
 
+		if (test_bit(AFS_VLSERVER_FL_RESPONDING, &s->flags))
+			e.responded = true;
 		afs_prioritise_error(&e, READ_ONCE(s->probe.error),
 				     s->probe.abort_code);
 	}
 
+	error = e.error;
+
 failed_set_error:
 	vc->error = error;
 failed:
-- 
GitLab


From ba8e42077bbe046a09bdb965dbfbf8c27594fe8f Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Thu, 20 Aug 2020 14:37:12 +0100
Subject: [PATCH 0362/1341] afs: Fix key ref leak in afs_put_operation()

The afs_put_operation() function needs to put the reference to the key
that's authenticating the operation.

Fixes: e49c7b2f6de7 ("afs: Build an abstraction around an "operation" concept")
Reported-by: Dave Botsch <botsch@cnf.cornell.edu>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/afs/fs_operation.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/afs/fs_operation.c b/fs/afs/fs_operation.c
index 24fd163c6323e..97cab12b0a6c2 100644
--- a/fs/afs/fs_operation.c
+++ b/fs/afs/fs_operation.c
@@ -235,6 +235,7 @@ int afs_put_operation(struct afs_operation *op)
 	afs_end_cursor(&op->ac);
 	afs_put_serverlist(op->net, op->server_list);
 	afs_put_volume(op->net, op->volume, afs_volume_trace_put_put_op);
+	key_put(op->key);
 	kfree(op);
 	return ret;
 }
-- 
GitLab


From c2affe920b0e0669650943ac086215cf6519be34 Mon Sep 17 00:00:00 2001
From: Adrian Huang <ahuang12@lenovo.com>
Date: Wed, 19 Aug 2020 23:42:36 +0800
Subject: [PATCH 0363/1341] dax: do not print error message for non-persistent
 memory block device
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Commit 231609785cbf ("dax: print error message by pr_info()
in __generic_fsdax_supported()") happens to print the following
error message during booting when the non-persistent memory block
devices are configured by device mapper. Those error messages are
caused by the variable 'dax_dev' is NULL. Users might be confused
with those error messages since they do not use the persistent
memory device. Moreover, users might scare about "what's wrong
with my disks" because they see the 'error' and 'failed' keywords.

  # dmesg | grep fail
  sdk3: error: dax access failed (-95)
  sdk3: error: dax access failed (-95)
  sdk3: error: dax access failed (-95)
  sdk3: error: dax access failed (-95)
  sdk3: error: dax access failed (-95)
  sdk3: error: dax access failed (-95)
  sdk3: error: dax access failed (-95)
  sdk3: error: dax access failed (-95)
  sdk3: error: dax access failed (-95)
  sdb3: error: dax access failed (-95)
  sdb3: error: dax access failed (-95)
  sdb3: error: dax access failed (-95)
  sdb3: error: dax access failed (-95)
  sdb3: error: dax access failed (-95)
  sdb3: error: dax access failed (-95)
  sdb3: error: dax access failed (-95)
  sdb3: error: dax access failed (-95)
  sdb3: error: dax access failed (-95)

  # lsblk
  NAME            MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
  sda               8:0    0   1.1T  0 disk
  ├─sda1            8:1    0   156M  0 part
  ├─sda2            8:2    0    40G  0 part
  └─sda3            8:3    0   1.1T  0 part
  sdb               8:16   0   1.1T  0 disk
  ├─sdb1            8:17   0   600M  0 part
  ├─sdb2            8:18   0     1G  0 part
  └─sdb3            8:19   0   1.1T  0 part
    ├─rhel00-swap 254:3    0     4G  0 lvm
    ├─rhel00-home 254:4    0     1T  0 lvm
    └─rhel00-root 254:5    0    50G  0 lvm
  sdc               8:32   0   1.1T  0 disk
  sdd               8:48   0   1.1T  0 disk
  sde               8:64   0   1.1T  0 disk
  sdf               8:80   0   1.1T  0 disk
  sdg               8:96   0   1.1T  0 disk
  sdh               8:112  0   3.3T  0 disk
  ├─sdh1            8:113  0   500M  0 part /boot/efi
  ├─sdh2            8:114  0    40G  0 part /
  ├─sdh3            8:115  0   2.9T  0 part /home
  └─sdh4            8:116  0 314.6G  0 part [SWAP]
  sdi               8:128  0   1.1T  0 disk
  sdj               8:144  0   3.3T  0 disk
  ├─sdj1            8:145  0   512M  0 part
  └─sdj2            8:146  0   3.3T  0 part
  sdk               8:160  0 119.2G  0 disk
  ├─sdk1            8:161  0   200M  0 part
  ├─sdk2            8:162  0     1G  0 part
  └─sdk3            8:163  0   118G  0 part
    ├─rhel-swap   254:0    0     4G  0 lvm
    ├─rhel-home   254:1    0    64G  0 lvm
    └─rhel-root   254:2    0    50G  0 lvm
  sdl               8:176  0 119.2G  0 disk

The call path is shown as follows:
  dm_table_determine_type
    dm_table_supports_dax
     device_supports_dax
       generic_fsdax_supported
        __generic_fsdax_supported

With the disk configuration listing from the command 'lsblk',
the member 'dev->dax_dev' of the block devices 'sdb3' and 'sdk3'
(configured by device mapper) is NULL in function
generic_fsdax_supported() because the member is configured in
function open_table_device().

To prevent the confusing error messages in this scenario (this is
normal behavior), just print those error messages by pr_debug()
by checking if dax_dev is NULL and the block device does not support
DAX.

Link: https://lore.kernel.org/r/20200819154236.24191-1-adrianhuang0701@gmail.com
Fixes: 231609785cbf ("dax: print error message by pr_info() in __generic_fsdax_supported()")
Cc: Coly Li <colyli@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Acked-by: Coly Li <colyli@suse.de>
Signed-off-by: Adrian Huang <ahuang12@lenovo.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
 drivers/dax/super.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index c82cbcb642028..32642634c1bb6 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -100,6 +100,12 @@ bool __generic_fsdax_supported(struct dax_device *dax_dev,
 		return false;
 	}
 
+	if (!dax_dev && !bdev_dax_supported(bdev, blocksize)) {
+		pr_debug("%s: error: dax unsupported by block device\n",
+				bdevname(bdev, buf));
+		return false;
+	}
+
 	id = dax_read_lock();
 	len = dax_direct_access(dax_dev, pgoff, 1, &kaddr, &pfn);
 	len2 = dax_direct_access(dax_dev, pgoff_end, 1, &end_kaddr, &end_pfn);
-- 
GitLab


From cc7f3f72dc2ae2b383142896d79ca1e237ad7e8b Mon Sep 17 00:00:00 2001
From: Anup Patel <anup.patel@wdc.com>
Date: Mon, 17 Aug 2020 18:12:48 +0530
Subject: [PATCH 0364/1341] RISC-V: Add mechanism to provide custom IPI
 operations

We add mechanism to set custom IPI operations so that CLINT driver
from drivers directory can provide custom IPI operations.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Emil Renner Berhing <kernel@esmil.dk>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/include/asm/clint.h | 25 --------------------
 arch/riscv/include/asm/smp.h   | 19 +++++++++++++++
 arch/riscv/kernel/clint.c      | 23 ++++++++++++++++--
 arch/riscv/kernel/sbi.c        | 14 +++++++++++
 arch/riscv/kernel/smp.c        | 43 +++++++++++++++++++---------------
 arch/riscv/kernel/smpboot.c    |  3 +--
 6 files changed, 79 insertions(+), 48 deletions(-)

diff --git a/arch/riscv/include/asm/clint.h b/arch/riscv/include/asm/clint.h
index a279b17a6aade..adaba98a7d6cf 100644
--- a/arch/riscv/include/asm/clint.h
+++ b/arch/riscv/include/asm/clint.h
@@ -6,34 +6,9 @@
 #include <linux/smp.h>
 
 #ifdef CONFIG_RISCV_M_MODE
-extern u32 __iomem *clint_ipi_base;
-
 void clint_init_boot_cpu(void);
-
-static inline void clint_send_ipi_single(unsigned long hartid)
-{
-	writel(1, clint_ipi_base + hartid);
-}
-
-static inline void clint_send_ipi_mask(const struct cpumask *mask)
-{
-	int cpu;
-
-	for_each_cpu(cpu, mask)
-		clint_send_ipi_single(cpuid_to_hartid_map(cpu));
-}
-
-static inline void clint_clear_ipi(unsigned long hartid)
-{
-	writel(0, clint_ipi_base + hartid);
-}
 #else /* CONFIG_RISCV_M_MODE */
 #define clint_init_boot_cpu()	do { } while (0)
-
-/* stubs to for code is only reachable under IS_ENABLED(CONFIG_RISCV_M_MODE): */
-void clint_send_ipi_single(unsigned long hartid);
-void clint_send_ipi_mask(const struct cpumask *hartid_mask);
-void clint_clear_ipi(unsigned long hartid);
 #endif /* CONFIG_RISCV_M_MODE */
 
 #endif /* _ASM_RISCV_CLINT_H */
diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h
index 6dfd2a1446d56..df1f7c4cd4337 100644
--- a/arch/riscv/include/asm/smp.h
+++ b/arch/riscv/include/asm/smp.h
@@ -15,6 +15,11 @@
 struct seq_file;
 extern unsigned long boot_cpu_hartid;
 
+struct riscv_ipi_ops {
+	void (*ipi_inject)(const struct cpumask *target);
+	void (*ipi_clear)(void);
+};
+
 #ifdef CONFIG_SMP
 /*
  * Mapping between linux logical cpu index and hartid.
@@ -40,6 +45,12 @@ void arch_send_call_function_single_ipi(int cpu);
 int riscv_hartid_to_cpuid(int hartid);
 void riscv_cpuid_to_hartid_mask(const struct cpumask *in, struct cpumask *out);
 
+/* Set custom IPI operations */
+void riscv_set_ipi_ops(struct riscv_ipi_ops *ops);
+
+/* Clear IPI for current CPU */
+void riscv_clear_ipi(void);
+
 /* Secondary hart entry */
 asmlinkage void smp_callin(void);
 
@@ -81,6 +92,14 @@ static inline void riscv_cpuid_to_hartid_mask(const struct cpumask *in,
 	cpumask_set_cpu(boot_cpu_hartid, out);
 }
 
+static inline void riscv_set_ipi_ops(struct riscv_ipi_ops *ops)
+{
+}
+
+static inline void riscv_clear_ipi(void)
+{
+}
+
 #endif /* CONFIG_SMP */
 
 #if defined(CONFIG_HOTPLUG_CPU) && (CONFIG_SMP)
diff --git a/arch/riscv/kernel/clint.c b/arch/riscv/kernel/clint.c
index 3647980d14c3c..a9845ee023e2c 100644
--- a/arch/riscv/kernel/clint.c
+++ b/arch/riscv/kernel/clint.c
@@ -5,11 +5,11 @@
 
 #include <linux/io.h>
 #include <linux/of_address.h>
+#include <linux/smp.h>
 #include <linux/types.h>
 #include <asm/clint.h>
 #include <asm/csr.h>
 #include <asm/timex.h>
-#include <asm/smp.h>
 
 /*
  * This is the layout used by the SiFive clint, which is also shared by the qemu
@@ -21,6 +21,24 @@
 
 u32 __iomem *clint_ipi_base;
 
+static void clint_send_ipi(const struct cpumask *target)
+{
+	unsigned int cpu;
+
+	for_each_cpu(cpu, target)
+		writel(1, clint_ipi_base + cpuid_to_hartid_map(cpu));
+}
+
+static void clint_clear_ipi(void)
+{
+	writel(0, clint_ipi_base + cpuid_to_hartid_map(smp_processor_id()));
+}
+
+static struct riscv_ipi_ops clint_ipi_ops = {
+	.ipi_inject = clint_send_ipi,
+	.ipi_clear = clint_clear_ipi,
+};
+
 void clint_init_boot_cpu(void)
 {
 	struct device_node *np;
@@ -40,5 +58,6 @@ void clint_init_boot_cpu(void)
 	riscv_time_cmp = base + CLINT_TIME_CMP_OFF;
 	riscv_time_val = base + CLINT_TIME_VAL_OFF;
 
-	clint_clear_ipi(boot_cpu_hartid);
+	clint_clear_ipi();
+	riscv_set_ipi_ops(&clint_ipi_ops);
 }
diff --git a/arch/riscv/kernel/sbi.c b/arch/riscv/kernel/sbi.c
index f383ef5672b20..226ccce0f9e07 100644
--- a/arch/riscv/kernel/sbi.c
+++ b/arch/riscv/kernel/sbi.c
@@ -547,6 +547,18 @@ static inline long sbi_get_firmware_version(void)
 	return __sbi_base_ecall(SBI_EXT_BASE_GET_IMP_VERSION);
 }
 
+static void sbi_send_cpumask_ipi(const struct cpumask *target)
+{
+	struct cpumask hartid_mask;
+
+	riscv_cpuid_to_hartid_mask(target, &hartid_mask);
+
+	sbi_send_ipi(cpumask_bits(&hartid_mask));
+}
+
+static struct riscv_ipi_ops sbi_ipi_ops = {
+	.ipi_inject = sbi_send_cpumask_ipi
+};
 
 int __init sbi_init(void)
 {
@@ -587,5 +599,7 @@ int __init sbi_init(void)
 		__sbi_rfence	= __sbi_rfence_v01;
 	}
 
+	riscv_set_ipi_ops(&sbi_ipi_ops);
+
 	return 0;
 }
diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
index 554b0fb470608..cf9acb43604c0 100644
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
@@ -86,9 +86,25 @@ static void ipi_stop(void)
 		wait_for_interrupt();
 }
 
+static struct riscv_ipi_ops *ipi_ops;
+
+void riscv_set_ipi_ops(struct riscv_ipi_ops *ops)
+{
+	ipi_ops = ops;
+}
+EXPORT_SYMBOL_GPL(riscv_set_ipi_ops);
+
+void riscv_clear_ipi(void)
+{
+	if (ipi_ops && ipi_ops->ipi_clear)
+		ipi_ops->ipi_clear();
+
+	csr_clear(CSR_IP, IE_SIE);
+}
+EXPORT_SYMBOL_GPL(riscv_clear_ipi);
+
 static void send_ipi_mask(const struct cpumask *mask, enum ipi_message_type op)
 {
-	struct cpumask hartid_mask;
 	int cpu;
 
 	smp_mb__before_atomic();
@@ -96,33 +112,22 @@ static void send_ipi_mask(const struct cpumask *mask, enum ipi_message_type op)
 		set_bit(op, &ipi_data[cpu].bits);
 	smp_mb__after_atomic();
 
-	riscv_cpuid_to_hartid_mask(mask, &hartid_mask);
-	if (IS_ENABLED(CONFIG_RISCV_SBI))
-		sbi_send_ipi(cpumask_bits(&hartid_mask));
+	if (ipi_ops && ipi_ops->ipi_inject)
+		ipi_ops->ipi_inject(mask);
 	else
-		clint_send_ipi_mask(mask);
+		pr_warn("SMP: IPI inject method not available\n");
 }
 
 static void send_ipi_single(int cpu, enum ipi_message_type op)
 {
-	int hartid = cpuid_to_hartid_map(cpu);
-
 	smp_mb__before_atomic();
 	set_bit(op, &ipi_data[cpu].bits);
 	smp_mb__after_atomic();
 
-	if (IS_ENABLED(CONFIG_RISCV_SBI))
-		sbi_send_ipi(cpumask_bits(cpumask_of(hartid)));
-	else
-		clint_send_ipi_single(hartid);
-}
-
-static inline void clear_ipi(void)
-{
-	if (IS_ENABLED(CONFIG_RISCV_SBI))
-		csr_clear(CSR_IP, IE_SIE);
+	if (ipi_ops && ipi_ops->ipi_inject)
+		ipi_ops->ipi_inject(cpumask_of(cpu));
 	else
-		clint_clear_ipi(cpuid_to_hartid_map(smp_processor_id()));
+		pr_warn("SMP: IPI inject method not available\n");
 }
 
 #ifdef CONFIG_IRQ_WORK
@@ -140,7 +145,7 @@ void handle_IPI(struct pt_regs *regs)
 
 	irq_enter();
 
-	clear_ipi();
+	riscv_clear_ipi();
 
 	while (true) {
 		unsigned long ops;
diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index 356825a57551c..12033d71ba0c4 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -147,8 +147,7 @@ asmlinkage __visible void smp_callin(void)
 	struct mm_struct *mm = &init_mm;
 	unsigned int curr_cpuid = smp_processor_id();
 
-	if (!IS_ENABLED(CONFIG_RISCV_SBI))
-		clint_clear_ipi(cpuid_to_hartid_map(smp_processor_id()));
+	riscv_clear_ipi();
 
 	/* All kernel threads share the same mm context.  */
 	mmgrab(mm);
-- 
GitLab


From 2ac6795fcc085e8d03649f1bbd0d70aaff612cad Mon Sep 17 00:00:00 2001
From: Anup Patel <anup.patel@wdc.com>
Date: Mon, 17 Aug 2020 18:12:49 +0530
Subject: [PATCH 0365/1341] clocksource/drivers: Add CLINT timer driver

We add a separate CLINT timer driver for Linux RISC-V M-mode (i.e.
RISC-V NoMMU kernel).

The CLINT MMIO device provides three things:
1. 64bit free running counter register
2. 64bit per-CPU time compare registers
3. 32bit per-CPU inter-processor interrupt registers

Unlike other timer devices, CLINT provides IPI registers along with
timer registers. To use CLINT IPI registers, the CLINT timer driver
provides IPI related callbacks to arch/riscv.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Emil Renner Berhing <kernel@esmil.dk>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 drivers/clocksource/Kconfig       |   9 ++
 drivers/clocksource/Makefile      |   1 +
 drivers/clocksource/timer-clint.c | 226 ++++++++++++++++++++++++++++++
 include/linux/cpuhotplug.h        |   1 +
 4 files changed, 237 insertions(+)
 create mode 100644 drivers/clocksource/timer-clint.c

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 3576ad7bd380f..d95cc7234a66e 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -663,6 +663,15 @@ config RISCV_TIMER
 	  is accessed via both the SBI and the rdcycle instruction.  This is
 	  required for all RISC-V systems.
 
+config CLINT_TIMER
+	bool "CLINT Timer for the RISC-V platform" if COMPILE_TEST
+	depends on GENERIC_SCHED_CLOCK && RISCV
+	select TIMER_PROBE
+	select TIMER_OF
+	help
+	  This option enables the CLINT timer for RISC-V systems.  The CLINT
+	  driver is usually used for NoMMU RISC-V systems.
+
 config CSKY_MP_TIMER
 	bool "SMP Timer for the C-SKY platform" if COMPILE_TEST
 	depends on CSKY
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index eaedb7240ae74..1c444cc3bb447 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -89,6 +89,7 @@ obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
 obj-$(CONFIG_X86_NUMACHIP)		+= numachip.o
 obj-$(CONFIG_ATCPIT100_TIMER)		+= timer-atcpit100.o
 obj-$(CONFIG_RISCV_TIMER)		+= timer-riscv.o
+obj-$(CONFIG_CLINT_TIMER)		+= timer-clint.o
 obj-$(CONFIG_CSKY_MP_TIMER)		+= timer-mp-csky.o
 obj-$(CONFIG_GX6605S_TIMER)		+= timer-gx6605s.o
 obj-$(CONFIG_HYPERV_TIMER)		+= hyperv_timer.o
diff --git a/drivers/clocksource/timer-clint.c b/drivers/clocksource/timer-clint.c
new file mode 100644
index 0000000000000..8eeafa82c03d3
--- /dev/null
+++ b/drivers/clocksource/timer-clint.c
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020 Western Digital Corporation or its affiliates.
+ *
+ * Most of the M-mode (i.e. NoMMU) RISC-V systems usually have a
+ * CLINT MMIO timer device.
+ */
+
+#define pr_fmt(fmt) "clint: " fmt
+#include <linux/bitops.h>
+#include <linux/clocksource.h>
+#include <linux/clockchips.h>
+#include <linux/cpu.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/sched_clock.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/interrupt.h>
+#include <linux/of_irq.h>
+#include <linux/smp.h>
+
+#define CLINT_IPI_OFF		0
+#define CLINT_TIMER_CMP_OFF	0x4000
+#define CLINT_TIMER_VAL_OFF	0xbff8
+
+/* CLINT manages IPI and Timer for RISC-V M-mode  */
+static u32 __iomem *clint_ipi_base;
+static u64 __iomem *clint_timer_cmp;
+static u64 __iomem *clint_timer_val;
+static unsigned long clint_timer_freq;
+static unsigned int clint_timer_irq;
+
+static void clint_send_ipi(const struct cpumask *target)
+{
+	unsigned int cpu;
+
+	for_each_cpu(cpu, target)
+		writel(1, clint_ipi_base + cpuid_to_hartid_map(cpu));
+}
+
+static void clint_clear_ipi(void)
+{
+	writel(0, clint_ipi_base + cpuid_to_hartid_map(smp_processor_id()));
+}
+
+static struct riscv_ipi_ops clint_ipi_ops = {
+	.ipi_inject = clint_send_ipi,
+	.ipi_clear = clint_clear_ipi,
+};
+
+#ifdef CONFIG_64BIT
+#define clint_get_cycles()	readq_relaxed(clint_timer_val)
+#else
+#define clint_get_cycles()	readl_relaxed(clint_timer_val)
+#define clint_get_cycles_hi()	readl_relaxed(((u32 *)clint_timer_val) + 1)
+#endif
+
+#ifdef CONFIG_64BIT
+static u64 notrace clint_get_cycles64(void)
+{
+	return clint_get_cycles();
+}
+#else /* CONFIG_64BIT */
+static u64 notrace clint_get_cycles64(void)
+{
+	u32 hi, lo;
+
+	do {
+		hi = clint_get_cycles_hi();
+		lo = clint_get_cycles();
+	} while (hi != clint_get_cycles_hi());
+
+	return ((u64)hi << 32) | lo;
+}
+#endif /* CONFIG_64BIT */
+
+static u64 clint_rdtime(struct clocksource *cs)
+{
+	return clint_get_cycles64();
+}
+
+static struct clocksource clint_clocksource = {
+	.name		= "clint_clocksource",
+	.rating		= 300,
+	.mask		= CLOCKSOURCE_MASK(64),
+	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
+	.read		= clint_rdtime,
+};
+
+static int clint_clock_next_event(unsigned long delta,
+				   struct clock_event_device *ce)
+{
+	void __iomem *r = clint_timer_cmp +
+			  cpuid_to_hartid_map(smp_processor_id());
+
+	csr_set(CSR_IE, IE_TIE);
+	writeq_relaxed(clint_get_cycles64() + delta, r);
+	return 0;
+}
+
+static DEFINE_PER_CPU(struct clock_event_device, clint_clock_event) = {
+	.name		= "clint_clockevent",
+	.features	= CLOCK_EVT_FEAT_ONESHOT,
+	.rating		= 100,
+	.set_next_event	= clint_clock_next_event,
+};
+
+static int clint_timer_starting_cpu(unsigned int cpu)
+{
+	struct clock_event_device *ce = per_cpu_ptr(&clint_clock_event, cpu);
+
+	ce->cpumask = cpumask_of(cpu);
+	clockevents_config_and_register(ce, clint_timer_freq, 100, 0x7fffffff);
+
+	enable_percpu_irq(clint_timer_irq,
+			  irq_get_trigger_type(clint_timer_irq));
+	return 0;
+}
+
+static int clint_timer_dying_cpu(unsigned int cpu)
+{
+	disable_percpu_irq(clint_timer_irq);
+	return 0;
+}
+
+static irqreturn_t clint_timer_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *evdev = this_cpu_ptr(&clint_clock_event);
+
+	csr_clear(CSR_IE, IE_TIE);
+	evdev->event_handler(evdev);
+
+	return IRQ_HANDLED;
+}
+
+static int __init clint_timer_init_dt(struct device_node *np)
+{
+	int rc;
+	u32 i, nr_irqs;
+	void __iomem *base;
+	struct of_phandle_args oirq;
+
+	/*
+	 * Ensure that CLINT device interrupts are either RV_IRQ_TIMER or
+	 * RV_IRQ_SOFT. If it's anything else then we ignore the device.
+	 */
+	nr_irqs = of_irq_count(np);
+	for (i = 0; i < nr_irqs; i++) {
+		if (of_irq_parse_one(np, i, &oirq)) {
+			pr_err("%pOFP: failed to parse irq %d.\n", np, i);
+			continue;
+		}
+
+		if ((oirq.args_count != 1) ||
+		    (oirq.args[0] != RV_IRQ_TIMER &&
+		     oirq.args[0] != RV_IRQ_SOFT)) {
+			pr_err("%pOFP: invalid irq %d (hwirq %d)\n",
+			       np, i, oirq.args[0]);
+			return -ENODEV;
+		}
+
+		/* Find parent irq domain and map timer irq */
+		if (!clint_timer_irq &&
+		    oirq.args[0] == RV_IRQ_TIMER &&
+		    irq_find_host(oirq.np))
+			clint_timer_irq = irq_of_parse_and_map(np, i);
+	}
+
+	/* If CLINT timer irq not found then fail */
+	if (!clint_timer_irq) {
+		pr_err("%pOFP: timer irq not found\n", np);
+		return -ENODEV;
+	}
+
+	base = of_iomap(np, 0);
+	if (!base) {
+		pr_err("%pOFP: could not map registers\n", np);
+		return -ENODEV;
+	}
+
+	clint_ipi_base = base + CLINT_IPI_OFF;
+	clint_timer_cmp = base + CLINT_TIMER_CMP_OFF;
+	clint_timer_val = base + CLINT_TIMER_VAL_OFF;
+	clint_timer_freq = riscv_timebase;
+
+	pr_info("%pOFP: timer running at %ld Hz\n", np, clint_timer_freq);
+
+	rc = clocksource_register_hz(&clint_clocksource, clint_timer_freq);
+	if (rc) {
+		pr_err("%pOFP: clocksource register failed [%d]\n", np, rc);
+		goto fail_iounmap;
+	}
+
+	sched_clock_register(clint_get_cycles64, 64, clint_timer_freq);
+
+	rc = request_percpu_irq(clint_timer_irq, clint_timer_interrupt,
+				 "clint-timer", &clint_clock_event);
+	if (rc) {
+		pr_err("registering percpu irq failed [%d]\n", rc);
+		goto fail_iounmap;
+	}
+
+	rc = cpuhp_setup_state(CPUHP_AP_CLINT_TIMER_STARTING,
+				"clockevents/clint/timer:starting",
+				clint_timer_starting_cpu,
+				clint_timer_dying_cpu);
+	if (rc) {
+		pr_err("%pOFP: cpuhp setup state failed [%d]\n", np, rc);
+		goto fail_free_irq;
+	}
+
+	riscv_set_ipi_ops(&clint_ipi_ops);
+	clint_clear_ipi();
+
+	return 0;
+
+fail_free_irq:
+	free_irq(clint_timer_irq, &clint_clock_event);
+fail_iounmap:
+	iounmap(base);
+	return rc;
+}
+
+TIMER_OF_DECLARE(clint_timer, "riscv,clint0", clint_timer_init_dt);
+TIMER_OF_DECLARE(clint_timer1, "sifive,clint0", clint_timer_init_dt);
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index a2710e654b642..3215023d48523 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -132,6 +132,7 @@ enum cpuhp_state {
 	CPUHP_AP_MIPS_GIC_TIMER_STARTING,
 	CPUHP_AP_ARC_TIMER_STARTING,
 	CPUHP_AP_RISCV_TIMER_STARTING,
+	CPUHP_AP_CLINT_TIMER_STARTING,
 	CPUHP_AP_CSKY_TIMER_STARTING,
 	CPUHP_AP_HYPERV_TIMER_STARTING,
 	CPUHP_AP_KVM_STARTING,
-- 
GitLab


From 2bc3fc877aa9c4c8b80cc49f66dfcb7e4857a128 Mon Sep 17 00:00:00 2001
From: Anup Patel <anup.patel@wdc.com>
Date: Mon, 17 Aug 2020 18:12:50 +0530
Subject: [PATCH 0366/1341] RISC-V: Remove CLINT related code from timer and
 arch

Right now the RISC-V timer driver is convoluted to support:
1. Linux RISC-V S-mode (with MMU) where it will use TIME CSR for
   clocksource and SBI timer calls for clockevent device.
2. Linux RISC-V M-mode (without MMU) where it will use CLINT MMIO
   counter register for clocksource and CLINT MMIO compare register
   for clockevent device.

We now have a separate CLINT timer driver which also provide CLINT
based IPI operations so let's remove CLINT MMIO related code from
arch/riscv directory and RISC-V timer driver.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Emil Renner Berhing <kernel@esmil.dk>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/Kconfig                      |  2 +-
 arch/riscv/Kconfig.socs                 |  2 +
 arch/riscv/configs/nommu_virt_defconfig |  7 +--
 arch/riscv/include/asm/clint.h          | 14 ------
 arch/riscv/include/asm/timex.h          | 28 +++--------
 arch/riscv/kernel/Makefile              |  2 +-
 arch/riscv/kernel/clint.c               | 63 -------------------------
 arch/riscv/kernel/setup.c               |  2 -
 arch/riscv/kernel/smp.c                 |  1 -
 arch/riscv/kernel/smpboot.c             |  1 -
 drivers/clocksource/Kconfig             |  3 +-
 drivers/clocksource/timer-riscv.c       | 17 +------
 12 files changed, 16 insertions(+), 126 deletions(-)
 delete mode 100644 arch/riscv/include/asm/clint.h
 delete mode 100644 arch/riscv/kernel/clint.c

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 7b59055291466..df18372861d8d 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -81,7 +81,7 @@ config RISCV
 	select PCI_DOMAINS_GENERIC if PCI
 	select PCI_MSI if PCI
 	select RISCV_INTC
-	select RISCV_TIMER
+	select RISCV_TIMER if RISCV_SBI
 	select SPARSEMEM_STATIC if 32BIT
 	select SPARSE_IRQ
 	select SYSCTL_EXCEPTION_TRACE
diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index 6c88148f1b9b3..8a55f6156661d 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -12,6 +12,7 @@ config SOC_SIFIVE
 
 config SOC_VIRT
 	bool "QEMU Virt Machine"
+	select CLINT_TIMER if RISCV_M_MODE
 	select POWER_RESET
 	select POWER_RESET_SYSCON
 	select POWER_RESET_SYSCON_POWEROFF
@@ -24,6 +25,7 @@ config SOC_VIRT
 config SOC_KENDRYTE
 	bool "Kendryte K210 SoC"
 	depends on !MMU
+	select CLINT_TIMER if RISCV_M_MODE
 	select SERIAL_SIFIVE if TTY
 	select SERIAL_SIFIVE_CONSOLE if TTY
 	select SIFIVE_PLIC
diff --git a/arch/riscv/configs/nommu_virt_defconfig b/arch/riscv/configs/nommu_virt_defconfig
index f27596e9663e3..e046a0babde43 100644
--- a/arch/riscv/configs/nommu_virt_defconfig
+++ b/arch/riscv/configs/nommu_virt_defconfig
@@ -26,6 +26,7 @@ CONFIG_EXPERT=y
 CONFIG_SLOB=y
 # CONFIG_SLAB_MERGE_DEFAULT is not set
 # CONFIG_MMU is not set
+CONFIG_SOC_VIRT=y
 CONFIG_MAXPHYSMEM_2GB=y
 CONFIG_SMP=y
 CONFIG_CMDLINE="root=/dev/vda rw earlycon=uart8250,mmio,0x10000000,115200n8 console=ttyS0"
@@ -49,7 +50,6 @@ CONFIG_VIRTIO_BLK=y
 # CONFIG_SERIO is not set
 # CONFIG_LEGACY_PTYS is not set
 # CONFIG_LDISC_AUTOLOAD is not set
-# CONFIG_DEVMEM is not set
 CONFIG_SERIAL_8250=y
 # CONFIG_SERIAL_8250_DEPRECATED_OPTIONS is not set
 CONFIG_SERIAL_8250_CONSOLE=y
@@ -57,16 +57,13 @@ CONFIG_SERIAL_8250_NR_UARTS=1
 CONFIG_SERIAL_8250_RUNTIME_UARTS=1
 CONFIG_SERIAL_OF_PLATFORM=y
 # CONFIG_HW_RANDOM is not set
+# CONFIG_DEVMEM is not set
 # CONFIG_HWMON is not set
-# CONFIG_LCD_CLASS_DEVICE is not set
-# CONFIG_BACKLIGHT_CLASS_DEVICE is not set
 # CONFIG_VGA_CONSOLE is not set
 # CONFIG_HID is not set
 # CONFIG_USB_SUPPORT is not set
 CONFIG_VIRTIO_MMIO=y
 CONFIG_VIRTIO_MMIO_CMDLINE_DEVICES=y
-CONFIG_SIFIVE_PLIC=y
-# CONFIG_VALIDATE_FS_PARSER is not set
 CONFIG_EXT2_FS=y
 # CONFIG_DNOTIFY is not set
 # CONFIG_INOTIFY_USER is not set
diff --git a/arch/riscv/include/asm/clint.h b/arch/riscv/include/asm/clint.h
deleted file mode 100644
index adaba98a7d6cf..0000000000000
--- a/arch/riscv/include/asm/clint.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_RISCV_CLINT_H
-#define _ASM_RISCV_CLINT_H 1
-
-#include <linux/io.h>
-#include <linux/smp.h>
-
-#ifdef CONFIG_RISCV_M_MODE
-void clint_init_boot_cpu(void);
-#else /* CONFIG_RISCV_M_MODE */
-#define clint_init_boot_cpu()	do { } while (0)
-#endif /* CONFIG_RISCV_M_MODE */
-
-#endif /* _ASM_RISCV_CLINT_H */
diff --git a/arch/riscv/include/asm/timex.h b/arch/riscv/include/asm/timex.h
index bad2a7c2cda52..a3fb85d505d44 100644
--- a/arch/riscv/include/asm/timex.h
+++ b/arch/riscv/include/asm/timex.h
@@ -7,41 +7,27 @@
 #define _ASM_RISCV_TIMEX_H
 
 #include <asm/csr.h>
-#include <asm/mmio.h>
 
 typedef unsigned long cycles_t;
 
-extern u64 __iomem *riscv_time_val;
-extern u64 __iomem *riscv_time_cmp;
-
-#ifdef CONFIG_64BIT
-#define mmio_get_cycles()	readq_relaxed(riscv_time_val)
-#else
-#define mmio_get_cycles()	readl_relaxed(riscv_time_val)
-#define mmio_get_cycles_hi()	readl_relaxed(((u32 *)riscv_time_val) + 1)
-#endif
-
 static inline cycles_t get_cycles(void)
 {
-	if (IS_ENABLED(CONFIG_RISCV_SBI))
-		return csr_read(CSR_TIME);
-	return mmio_get_cycles();
+	return csr_read(CSR_TIME);
 }
 #define get_cycles get_cycles
 
+static inline u32 get_cycles_hi(void)
+{
+	return csr_read(CSR_TIMEH);
+}
+#define get_cycles_hi get_cycles_hi
+
 #ifdef CONFIG_64BIT
 static inline u64 get_cycles64(void)
 {
 	return get_cycles();
 }
 #else /* CONFIG_64BIT */
-static inline u32 get_cycles_hi(void)
-{
-	if (IS_ENABLED(CONFIG_RISCV_SBI))
-		return csr_read(CSR_TIMEH);
-	return mmio_get_cycles_hi();
-}
-
 static inline u64 get_cycles64(void)
 {
 	u32 hi, lo;
diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
index a5287ab9f7f25..dc93710f0b2f1 100644
--- a/arch/riscv/kernel/Makefile
+++ b/arch/riscv/kernel/Makefile
@@ -31,7 +31,7 @@ obj-y	+= cacheinfo.o
 obj-y	+= patch.o
 obj-$(CONFIG_MMU) += vdso.o vdso/
 
-obj-$(CONFIG_RISCV_M_MODE)	+= clint.o traps_misaligned.o
+obj-$(CONFIG_RISCV_M_MODE)	+= traps_misaligned.o
 obj-$(CONFIG_FPU)		+= fpu.o
 obj-$(CONFIG_SMP)		+= smpboot.o
 obj-$(CONFIG_SMP)		+= smp.o
diff --git a/arch/riscv/kernel/clint.c b/arch/riscv/kernel/clint.c
deleted file mode 100644
index a9845ee023e2c..0000000000000
--- a/arch/riscv/kernel/clint.c
+++ /dev/null
@@ -1,63 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2019 Christoph Hellwig.
- */
-
-#include <linux/io.h>
-#include <linux/of_address.h>
-#include <linux/smp.h>
-#include <linux/types.h>
-#include <asm/clint.h>
-#include <asm/csr.h>
-#include <asm/timex.h>
-
-/*
- * This is the layout used by the SiFive clint, which is also shared by the qemu
- * virt platform, and the Kendryte KD210 at least.
- */
-#define CLINT_IPI_OFF		0
-#define CLINT_TIME_CMP_OFF	0x4000
-#define CLINT_TIME_VAL_OFF	0xbff8
-
-u32 __iomem *clint_ipi_base;
-
-static void clint_send_ipi(const struct cpumask *target)
-{
-	unsigned int cpu;
-
-	for_each_cpu(cpu, target)
-		writel(1, clint_ipi_base + cpuid_to_hartid_map(cpu));
-}
-
-static void clint_clear_ipi(void)
-{
-	writel(0, clint_ipi_base + cpuid_to_hartid_map(smp_processor_id()));
-}
-
-static struct riscv_ipi_ops clint_ipi_ops = {
-	.ipi_inject = clint_send_ipi,
-	.ipi_clear = clint_clear_ipi,
-};
-
-void clint_init_boot_cpu(void)
-{
-	struct device_node *np;
-	void __iomem *base;
-
-	np = of_find_compatible_node(NULL, NULL, "riscv,clint0");
-	if (!np) {
-		panic("clint not found");
-		return;
-	}
-
-	base = of_iomap(np, 0);
-	if (!base)
-		panic("could not map CLINT");
-
-	clint_ipi_base = base + CLINT_IPI_OFF;
-	riscv_time_cmp = base + CLINT_TIME_CMP_OFF;
-	riscv_time_val = base + CLINT_TIME_VAL_OFF;
-
-	clint_clear_ipi();
-	riscv_set_ipi_ops(&clint_ipi_ops);
-}
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index f04373be54a6b..2c6dd329312bd 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -18,7 +18,6 @@
 #include <linux/swiotlb.h>
 #include <linux/smp.h>
 
-#include <asm/clint.h>
 #include <asm/cpu_ops.h>
 #include <asm/setup.h>
 #include <asm/sections.h>
@@ -79,7 +78,6 @@ void __init setup_arch(char **cmdline_p)
 #else
 	unflatten_device_tree();
 #endif
-	clint_init_boot_cpu();
 
 #ifdef CONFIG_SWIOTLB
 	swiotlb_init(1);
diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
index cf9acb43604c0..ea028d9e0d242 100644
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
@@ -18,7 +18,6 @@
 #include <linux/delay.h>
 #include <linux/irq_work.h>
 
-#include <asm/clint.h>
 #include <asm/sbi.h>
 #include <asm/tlbflush.h>
 #include <asm/cacheflush.h>
diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index 12033d71ba0c4..96167d55ed984 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -24,7 +24,6 @@
 #include <linux/of.h>
 #include <linux/sched/task_stack.h>
 #include <linux/sched/mm.h>
-#include <asm/clint.h>
 #include <asm/cpu_ops.h>
 #include <asm/irq.h>
 #include <asm/mmu_context.h>
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index d95cc7234a66e..68b087bff59cc 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -653,9 +653,8 @@ config ATCPIT100_TIMER
 	  This option enables support for the Andestech ATCPIT100 timers.
 
 config RISCV_TIMER
-	bool "Timer for the RISC-V platform"
+	bool "Timer for the RISC-V platform" if COMPILE_TEST
 	depends on GENERIC_SCHED_CLOCK && RISCV
-	default y
 	select TIMER_PROBE
 	select TIMER_OF
 	help
diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-riscv.c
index 9de1dabfb1268..c51c5ed15aa75 100644
--- a/drivers/clocksource/timer-riscv.c
+++ b/drivers/clocksource/timer-riscv.c
@@ -19,26 +19,13 @@
 #include <linux/of_irq.h>
 #include <asm/smp.h>
 #include <asm/sbi.h>
-
-u64 __iomem *riscv_time_cmp;
-u64 __iomem *riscv_time_val;
-
-static inline void mmio_set_timer(u64 val)
-{
-	void __iomem *r;
-
-	r = riscv_time_cmp + cpuid_to_hartid_map(smp_processor_id());
-	writeq_relaxed(val, r);
-}
+#include <asm/timex.h>
 
 static int riscv_clock_next_event(unsigned long delta,
 		struct clock_event_device *ce)
 {
 	csr_set(CSR_IE, IE_TIE);
-	if (IS_ENABLED(CONFIG_RISCV_SBI))
-		sbi_set_timer(get_cycles64() + delta);
-	else
-		mmio_set_timer(get_cycles64() + delta);
+	sbi_set_timer(get_cycles64() + delta);
 	return 0;
 }
 
-- 
GitLab


From a2770b57d0838148b6d0c8167214dce15c3645a3 Mon Sep 17 00:00:00 2001
From: Anup Patel <anup.patel@wdc.com>
Date: Mon, 17 Aug 2020 18:12:51 +0530
Subject: [PATCH 0367/1341] dt-bindings: timer: Add CLINT bindings

We add DT bindings documentation for CLINT device.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Tested-by: Emil Renner Berhing <kernel@esmil.dk>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 .../bindings/timer/sifive,clint.yaml          | 60 +++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/sifive,clint.yaml

diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
new file mode 100644
index 0000000000000..2a0e9cd9fbcf0
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/sifive,clint.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SiFive Core Local Interruptor
+
+maintainers:
+  - Palmer Dabbelt <palmer@dabbelt.com>
+  - Anup Patel <anup.patel@wdc.com>
+
+description:
+  SiFive (and other RISC-V) SOCs include an implementation of the SiFive
+  Core Local Interruptor (CLINT) for M-mode timer and M-mode inter-processor
+  interrupts. It directly connects to the timer and inter-processor interrupt
+  lines of various HARTs (or CPUs) so RISC-V per-HART (or per-CPU) local
+  interrupt controller is the parent interrupt controller for CLINT device.
+  The clock frequency of CLINT is specified via "timebase-frequency" DT
+  property of "/cpus" DT node. The "timebase-frequency" DT property is
+  described in Documentation/devicetree/bindings/riscv/cpus.yaml
+
+properties:
+  compatible:
+    items:
+      - const: sifive,fu540-c000-clint
+      - const: sifive,clint0
+
+    description:
+      Should be "sifive,<chip>-clint" and "sifive,clint<version>".
+      Supported compatible strings are -
+      "sifive,fu540-c000-clint" for the SiFive CLINT v0 as integrated
+      onto the SiFive FU540 chip, and "sifive,clint0" for the SiFive
+      CLINT v0 IP block with no chip integration tweaks.
+      Please refer to sifive-blocks-ip-versioning.txt for details
+
+  reg:
+    maxItems: 1
+
+  interrupts-extended:
+    minItems: 1
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts-extended
+
+examples:
+  - |
+    timer@2000000 {
+      compatible = "sifive,fu540-c000-clint", "sifive,clint0";
+      interrupts-extended = <&cpu1intc 3 &cpu1intc 7
+                             &cpu2intc 3 &cpu2intc 7
+                             &cpu3intc 3 &cpu3intc 7
+                             &cpu4intc 3 &cpu4intc 7>;
+       reg = <0x2000000 0x10000>;
+    };
+...
-- 
GitLab


From fc26f5bbf19459930b7290c87b65a9ae6a274650 Mon Sep 17 00:00:00 2001
From: Bin Meng <bin.meng@windriver.com>
Date: Wed, 15 Jul 2020 21:39:53 -0700
Subject: [PATCH 0368/1341] riscv: Add SiFive drivers to rv32_defconfig

This adds SiFive drivers to rv32_defconfig, to keep in sync with the
64-bit config. This is useful when testing 32-bit kernel with QEMU
'sifive_u' 32-bit machine.

Signed-off-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/configs/rv32_defconfig | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/riscv/configs/rv32_defconfig b/arch/riscv/configs/rv32_defconfig
index 3a55f0e00d6c0..2c2cda6cc1c53 100644
--- a/arch/riscv/configs/rv32_defconfig
+++ b/arch/riscv/configs/rv32_defconfig
@@ -14,6 +14,7 @@ CONFIG_CHECKPOINT_RESTORE=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_EXPERT=y
 CONFIG_BPF_SYSCALL=y
+CONFIG_SOC_SIFIVE=y
 CONFIG_SOC_VIRT=y
 CONFIG_ARCH_RV32I=y
 CONFIG_SMP=y
@@ -62,6 +63,8 @@ CONFIG_HVC_RISCV_SBI=y
 CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_VIRTIO=y
+CONFIG_SPI=y
+CONFIG_SPI_SIFIVE=y
 # CONFIG_PTP_1588_CLOCK is not set
 CONFIG_POWER_RESET=y
 CONFIG_DRM=y
@@ -77,6 +80,8 @@ CONFIG_USB_OHCI_HCD=y
 CONFIG_USB_OHCI_HCD_PLATFORM=y
 CONFIG_USB_STORAGE=y
 CONFIG_USB_UAS=y
+CONFIG_MMC=y
+CONFIG_MMC_SPI=y
 CONFIG_RTC_CLASS=y
 CONFIG_VIRTIO_PCI=y
 CONFIG_VIRTIO_BALLOON=y
-- 
GitLab


From fb73ed5ef7e1f3b561dae517b9efdf58c153636b Mon Sep 17 00:00:00 2001
From: Kaige Li <likaige@loongson.cn>
Date: Thu, 20 Aug 2020 14:47:55 +0800
Subject: [PATCH 0369/1341] net: phy: mscc: Fix a couple of spelling mistakes
 "spcified" -> "specified"

There are a couple of spelling mistakes in comment text. Fix these.

Signed-off-by: Kaige Li <likaige@loongson.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/phy/mscc/mscc_main.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c
index a4fbf3a4fa973..6bc7406a1ce73 100644
--- a/drivers/net/phy/mscc/mscc_main.c
+++ b/drivers/net/phy/mscc/mscc_main.c
@@ -1738,13 +1738,13 @@ static int __phy_write_mcb_s6g(struct phy_device *phydev, u32 reg, u8 mcb,
 	return 0;
 }
 
-/* Trigger a read to the spcified MCB */
+/* Trigger a read to the specified MCB */
 static int phy_update_mcb_s6g(struct phy_device *phydev, u32 reg, u8 mcb)
 {
 	return __phy_write_mcb_s6g(phydev, reg, mcb, PHY_MCB_S6G_READ);
 }
 
-/* Trigger a write to the spcified MCB */
+/* Trigger a write to the specified MCB */
 static int phy_commit_mcb_s6g(struct phy_device *phydev, u32 reg, u8 mcb)
 {
 	return __phy_write_mcb_s6g(phydev, reg, mcb, PHY_MCB_S6G_WRITE);
-- 
GitLab


From bc62d68e2a0a69fcdcf28aca8edb01abf306b698 Mon Sep 17 00:00:00 2001
From: Amol Grover <frextrite@gmail.com>
Date: Mon, 6 Apr 2020 16:29:50 +0530
Subject: [PATCH 0370/1341] device_cgroup: Fix RCU list debugging warning

exceptions may be traversed using list_for_each_entry_rcu()
outside of an RCU read side critical section BUT under the
protection of decgroup_mutex. Hence add the corresponding
lockdep expression to fix the following false-positive
warning:

[    2.304417] =============================
[    2.304418] WARNING: suspicious RCU usage
[    2.304420] 5.5.4-stable #17 Tainted: G            E
[    2.304422] -----------------------------
[    2.304424] security/device_cgroup.c:355 RCU-list traversed in non-reader section!!

Signed-off-by: Amol Grover <frextrite@gmail.com>
Signed-off-by: James Morris <jmorris@namei.org>
---
 security/device_cgroup.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/security/device_cgroup.c b/security/device_cgroup.c
index 43ab0ad45c1b6..04375df52fc9a 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -354,7 +354,8 @@ static bool match_exception_partial(struct list_head *exceptions, short type,
 {
 	struct dev_exception_item *ex;
 
-	list_for_each_entry_rcu(ex, exceptions, list) {
+	list_for_each_entry_rcu(ex, exceptions, list,
+				lockdep_is_held(&devcgroup_mutex)) {
 		if ((type & DEVCG_DEV_BLOCK) && !(ex->type & DEVCG_DEV_BLOCK))
 			continue;
 		if ((type & DEVCG_DEV_CHAR) && !(ex->type & DEVCG_DEV_CHAR))
-- 
GitLab


From 3e659a82c45076e354d20db4b0776e716c6e7fe3 Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree@solarflare.com>
Date: Thu, 20 Aug 2020 11:47:19 +0100
Subject: [PATCH 0371/1341] sfc: fix build warnings on 32-bit

Truncation of DMA_BIT_MASK to 32-bit dma_addr_t is semantically safe,
 but the compiler was warning because it was happening implicitly.
Insert explicit casts to suppress the warnings.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/sfc/ef100.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/sfc/ef100.c b/drivers/net/ethernet/sfc/ef100.c
index 9729983f48409..c54b7f8243f3b 100644
--- a/drivers/net/ethernet/sfc/ef100.c
+++ b/drivers/net/ethernet/sfc/ef100.c
@@ -142,7 +142,7 @@ static int ef100_pci_parse_continue_entry(struct efx_nic *efx, int entry_locatio
 
 		/* Temporarily map new BAR. */
 		rc = efx_init_io(efx, bar,
-				 DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+				 (dma_addr_t)DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
 				 pci_resource_len(efx->pci_dev, bar));
 		if (rc) {
 			netif_err(efx, probe, efx->net_dev,
@@ -160,7 +160,7 @@ static int ef100_pci_parse_continue_entry(struct efx_nic *efx, int entry_locatio
 
 		/* Put old BAR back. */
 		rc = efx_init_io(efx, previous_bar,
-				 DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+				 (dma_addr_t)DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
 				 pci_resource_len(efx->pci_dev, previous_bar));
 		if (rc) {
 			netif_err(efx, probe, efx->net_dev,
@@ -334,7 +334,7 @@ static int ef100_pci_parse_xilinx_cap(struct efx_nic *efx, int vndr_cap,
 
 	/* Temporarily map BAR. */
 	rc = efx_init_io(efx, bar,
-			 DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+			 (dma_addr_t)DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
 			 pci_resource_len(efx->pci_dev, bar));
 	if (rc) {
 		netif_err(efx, probe, efx->net_dev,
@@ -495,7 +495,7 @@ static int ef100_pci_probe(struct pci_dev *pci_dev,
 
 	/* Set up basic I/O (BAR mappings etc) */
 	rc = efx_init_io(efx, fcw.bar,
-			 DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
+			 (dma_addr_t)DMA_BIT_MASK(ESF_GZ_TX_SEND_ADDR_WIDTH),
 			 pci_resource_len(efx->pci_dev, fcw.bar));
 	if (rc)
 		goto fail;
-- 
GitLab


From ce51f63e63c52a4e1eee4dd040fb0ba0af3b43ab Mon Sep 17 00:00:00 2001
From: Peilin Ye <yepeilin.cs@gmail.com>
Date: Thu, 20 Aug 2020 16:30:52 +0200
Subject: [PATCH 0372/1341] net/smc: Prevent kernel-infoleak in
 __smc_diag_dump()

__smc_diag_dump() is potentially copying uninitialized kernel stack memory
into socket buffers, since the compiler may leave a 4-byte hole near the
beginning of `struct smcd_diag_dmbinfo`. Fix it by initializing `dinfo`
with memset().

Fixes: 4b1b7d3b30a6 ("net/smc: add SMC-D diag support")
Suggested-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/smc/smc_diag.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/net/smc/smc_diag.c b/net/smc/smc_diag.c
index e1f64f4ba2361..da9ba6d1679b7 100644
--- a/net/smc/smc_diag.c
+++ b/net/smc/smc_diag.c
@@ -170,13 +170,15 @@ static int __smc_diag_dump(struct sock *sk, struct sk_buff *skb,
 	    (req->diag_ext & (1 << (SMC_DIAG_DMBINFO - 1))) &&
 	    !list_empty(&smc->conn.lgr->list)) {
 		struct smc_connection *conn = &smc->conn;
-		struct smcd_diag_dmbinfo dinfo = {
-			.linkid = *((u32 *)conn->lgr->id),
-			.peer_gid = conn->lgr->peer_gid,
-			.my_gid = conn->lgr->smcd->local_gid,
-			.token = conn->rmb_desc->token,
-			.peer_token = conn->peer_token
-		};
+		struct smcd_diag_dmbinfo dinfo;
+
+		memset(&dinfo, 0, sizeof(dinfo));
+
+		dinfo.linkid = *((u32 *)conn->lgr->id);
+		dinfo.peer_gid = conn->lgr->peer_gid;
+		dinfo.my_gid = conn->lgr->smcd->local_gid;
+		dinfo.token = conn->rmb_desc->token;
+		dinfo.peer_token = conn->peer_token;
 
 		if (nla_put(skb, SMC_DIAG_DMBINFO, sizeof(dinfo), &dinfo) < 0)
 			goto errout;
-- 
GitLab


From 51f6463aacfbfd322bcaadc606da56acef644b05 Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Wed, 19 Aug 2020 11:23:42 +0200
Subject: [PATCH 0373/1341] tools/resolve_btfids: Fix sections with wrong
 alignment

The data of compressed section should be aligned to 4
(for 32bit) or 8 (for 64 bit) bytes.

The binutils ld sets sh_addralign to 1, which makes libelf
fail with misaligned section error during the update as
reported by Jesper:

   FAILED elf_update(WRITE): invalid section alignment

While waiting for ld fix, we can fix compressed sections
sh_addralign value manually.

Adding warning in -vv mode when the fix is triggered:

  $ ./tools/bpf/resolve_btfids/resolve_btfids -vv vmlinux
  ...
  section(36) .comment, size 44, link 0, flags 30, type=1
  section(37) .debug_aranges, size 45684, link 0, flags 800, type=1
   - fixing wrong alignment sh_addralign 16, expected 8
  section(38) .debug_info, size 129104957, link 0, flags 800, type=1
   - fixing wrong alignment sh_addralign 1, expected 8
  section(39) .debug_abbrev, size 1152583, link 0, flags 800, type=1
   - fixing wrong alignment sh_addralign 1, expected 8
  section(40) .debug_line, size 7374522, link 0, flags 800, type=1
   - fixing wrong alignment sh_addralign 1, expected 8
  section(41) .debug_frame, size 702463, link 0, flags 800, type=1
  section(42) .debug_str, size 1017571, link 0, flags 830, type=1
   - fixing wrong alignment sh_addralign 1, expected 8
  section(43) .debug_loc, size 3019453, link 0, flags 800, type=1
   - fixing wrong alignment sh_addralign 1, expected 8
  section(44) .debug_ranges, size 1744583, link 0, flags 800, type=1
   - fixing wrong alignment sh_addralign 16, expected 8
  section(45) .symtab, size 2955888, link 46, flags 0, type=2
  section(46) .strtab, size 2613072, link 0, flags 0, type=3
  ...
  update ok for vmlinux

Another workaround is to disable compressed debug info data
CONFIG_DEBUG_INFO_COMPRESSED kernel option.

Fixes: fbbb68de80a4 ("bpf: Add resolve_btfids tool to resolve BTF IDs in ELF object")
Reported-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Yonghong Song <yhs@fb.com>
Cc: Mark Wielaard <mjw@redhat.com>
Cc: Nick Clifton <nickc@redhat.com>
Link: https://lore.kernel.org/bpf/20200819092342.259004-1-jolsa@kernel.org
---
 tools/bpf/resolve_btfids/main.c | 36 +++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c
index 4d9ecb9758622..0def0bb1f7832 100644
--- a/tools/bpf/resolve_btfids/main.c
+++ b/tools/bpf/resolve_btfids/main.c
@@ -233,6 +233,39 @@ static struct btf_id *add_symbol(struct rb_root *root, char *name, size_t size)
 	return btf_id__add(root, id, false);
 }
 
+/*
+ * The data of compressed section should be aligned to 4
+ * (for 32bit) or 8 (for 64 bit) bytes. The binutils ld
+ * sets sh_addralign to 1, which makes libelf fail with
+ * misaligned section error during the update:
+ *    FAILED elf_update(WRITE): invalid section alignment
+ *
+ * While waiting for ld fix, we fix the compressed sections
+ * sh_addralign value manualy.
+ */
+static int compressed_section_fix(Elf *elf, Elf_Scn *scn, GElf_Shdr *sh)
+{
+	int expected = gelf_getclass(elf) == ELFCLASS32 ? 4 : 8;
+
+	if (!(sh->sh_flags & SHF_COMPRESSED))
+		return 0;
+
+	if (sh->sh_addralign == expected)
+		return 0;
+
+	pr_debug2(" - fixing wrong alignment sh_addralign %u, expected %u\n",
+		  sh->sh_addralign, expected);
+
+	sh->sh_addralign = expected;
+
+	if (gelf_update_shdr(scn, sh) == 0) {
+		printf("FAILED cannot update section header: %s\n",
+			elf_errmsg(-1));
+		return -1;
+	}
+	return 0;
+}
+
 static int elf_collect(struct object *obj)
 {
 	Elf_Scn *scn = NULL;
@@ -309,6 +342,9 @@ static int elf_collect(struct object *obj)
 			obj->efile.idlist_shndx = idx;
 			obj->efile.idlist_addr  = sh.sh_addr;
 		}
+
+		if (compressed_section_fix(elf, scn, &sh))
+			return -1;
 	}
 
 	return 0;
-- 
GitLab


From 5597432dde62befd3ab92e6ef9e073564e277ea8 Mon Sep 17 00:00:00 2001
From: Veronika Kabatova <vkabatov@redhat.com>
Date: Wed, 19 Aug 2020 18:07:10 +0200
Subject: [PATCH 0374/1341] selftests/bpf: Remove test_align leftovers

Calling generic selftests "make install" fails as rsync expects all
files from TEST_GEN_PROGS to be present. The binary is not generated
anymore (commit 3b09d27cc93d) so we can safely remove it from there
and also from gitignore.

Fixes: 3b09d27cc93d ("selftests/bpf: Move test_align under test_progs")
Signed-off-by: Veronika Kabatova <vkabatov@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/bpf/20200819160710.1345956-1-vkabatov@redhat.com
---
 tools/testing/selftests/bpf/.gitignore | 1 -
 tools/testing/selftests/bpf/Makefile   | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/testing/selftests/bpf/.gitignore b/tools/testing/selftests/bpf/.gitignore
index 1bb204cee853f..9a0946ddb705a 100644
--- a/tools/testing/selftests/bpf/.gitignore
+++ b/tools/testing/selftests/bpf/.gitignore
@@ -6,7 +6,6 @@ test_lpm_map
 test_tag
 FEATURE-DUMP.libbpf
 fixdep
-test_align
 test_dev_cgroup
 /test_progs*
 test_tcpbpf_user
diff --git a/tools/testing/selftests/bpf/Makefile b/tools/testing/selftests/bpf/Makefile
index a83b5827532f7..fc946b7ac288d 100644
--- a/tools/testing/selftests/bpf/Makefile
+++ b/tools/testing/selftests/bpf/Makefile
@@ -32,7 +32,7 @@ LDLIBS += -lcap -lelf -lz -lrt -lpthread
 
 # Order correspond to 'make run_tests' order
 TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
-	test_align test_verifier_log test_dev_cgroup test_tcpbpf_user \
+	test_verifier_log test_dev_cgroup test_tcpbpf_user \
 	test_sock test_btf test_sockmap get_cgroup_id_user test_socket_cookie \
 	test_cgroup_storage \
 	test_netcnt test_tcpnotify_user test_sock_fields test_sysctl \
-- 
GitLab


From c8a36f1945b2b1b3f9823b66fc2181dc069cf803 Mon Sep 17 00:00:00 2001
From: Andrii Nakryiko <andriin@fb.com>
Date: Wed, 19 Aug 2020 22:28:41 -0700
Subject: [PATCH 0375/1341] bpf: xdp: Fix XDP mode when no mode flags specified

7f0a838254bd ("bpf, xdp: Maintain info on attached XDP BPF programs in net_device")
inadvertently changed which XDP mode is assumed when no mode flags are
specified explicitly. Previously, driver mode was preferred, if driver
supported it. If not, generic SKB mode was chosen. That commit changed default
to SKB mode always. This patch fixes the issue and restores the original
logic.

Fixes: 7f0a838254bd ("bpf, xdp: Maintain info on attached XDP BPF programs in net_device")
Reported-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/bpf/20200820052841.1559757-1-andriin@fb.com
---
 net/core/dev.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index b5d1129d83103..d42c9ea0c3c03 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -8742,13 +8742,15 @@ struct bpf_xdp_link {
 	int flags;
 };
 
-static enum bpf_xdp_mode dev_xdp_mode(u32 flags)
+static enum bpf_xdp_mode dev_xdp_mode(struct net_device *dev, u32 flags)
 {
 	if (flags & XDP_FLAGS_HW_MODE)
 		return XDP_MODE_HW;
 	if (flags & XDP_FLAGS_DRV_MODE)
 		return XDP_MODE_DRV;
-	return XDP_MODE_SKB;
+	if (flags & XDP_FLAGS_SKB_MODE)
+		return XDP_MODE_SKB;
+	return dev->netdev_ops->ndo_bpf ? XDP_MODE_DRV : XDP_MODE_SKB;
 }
 
 static bpf_op_t dev_xdp_bpf_op(struct net_device *dev, enum bpf_xdp_mode mode)
@@ -8896,7 +8898,7 @@ static int dev_xdp_attach(struct net_device *dev, struct netlink_ext_ack *extack
 		return -EINVAL;
 	}
 
-	mode = dev_xdp_mode(flags);
+	mode = dev_xdp_mode(dev, flags);
 	/* can't replace attached link */
 	if (dev_xdp_link(dev, mode)) {
 		NL_SET_ERR_MSG(extack, "Can't replace active BPF XDP link");
@@ -8984,7 +8986,7 @@ static int dev_xdp_detach_link(struct net_device *dev,
 
 	ASSERT_RTNL();
 
-	mode = dev_xdp_mode(link->flags);
+	mode = dev_xdp_mode(dev, link->flags);
 	if (dev_xdp_link(dev, mode) != link)
 		return -EINVAL;
 
@@ -9080,7 +9082,7 @@ static int bpf_xdp_link_update(struct bpf_link *link, struct bpf_prog *new_prog,
 		goto out_unlock;
 	}
 
-	mode = dev_xdp_mode(xdp_link->flags);
+	mode = dev_xdp_mode(xdp_link->dev, xdp_link->flags);
 	bpf_op = dev_xdp_bpf_op(xdp_link->dev, mode);
 	err = dev_xdp_install(xdp_link->dev, mode, bpf_op, NULL,
 			      xdp_link->flags, new_prog);
@@ -9164,7 +9166,7 @@ int bpf_xdp_link_attach(const union bpf_attr *attr, struct bpf_prog *prog)
 int dev_change_xdp_fd(struct net_device *dev, struct netlink_ext_ack *extack,
 		      int fd, int expected_fd, u32 flags)
 {
-	enum bpf_xdp_mode mode = dev_xdp_mode(flags);
+	enum bpf_xdp_mode mode = dev_xdp_mode(dev, flags);
 	struct bpf_prog *new_prog = NULL, *old_prog = NULL;
 	int err;
 
-- 
GitLab


From c210773d6c6f595f5922d56b7391fe343bc7310e Mon Sep 17 00:00:00 2001
From: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Date: Thu, 20 Aug 2020 14:58:43 +0300
Subject: [PATCH 0376/1341] bpf: selftests: global_funcs: Check err_str before
 strstr

The error path in libbpf.c:load_program() has calls to pr_warn()
which ends up for global_funcs tests to
test_global_funcs.c:libbpf_debug_print().

For the tests with no struct test_def::err_str initialized with a
string, it causes call of strstr() with NULL as the second argument
and it segfaults.

Fix it by calling strstr() only for non-NULL err_str.

Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20200820115843.39454-1-yauheni.kaliuta@redhat.com
---
 tools/testing/selftests/bpf/prog_tests/test_global_funcs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c b/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c
index 25b068591e9a4..193002b14d7f6 100644
--- a/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c
+++ b/tools/testing/selftests/bpf/prog_tests/test_global_funcs.c
@@ -19,7 +19,7 @@ static int libbpf_debug_print(enum libbpf_print_level level,
 	log_buf = va_arg(args, char *);
 	if (!log_buf)
 		goto out;
-	if (strstr(log_buf, err_str) == 0)
+	if (err_str && strstr(log_buf, err_str) == 0)
 		found = true;
 out:
 	printf(format, log_buf);
-- 
GitLab


From 5c1e4f7e9e49b6925b1fb5c507d2c614f3edb292 Mon Sep 17 00:00:00 2001
From: Po-Hsu Lin <po-hsu.lin@canonical.com>
Date: Wed, 18 Mar 2020 10:42:15 +0800
Subject: [PATCH 0377/1341] selftests/timers: Turn off timeout setting

The following 4 tests in timers can take longer than the default 45
seconds that added in commit 852c8cbf34d3 ("selftests/kselftest/runner.sh:
Add 45 second timeout per test") to run:
  * nsleep-lat - 2m7.350s
  * set-timer-lat - 2m0.66s
  * inconsistency-check - 1m45.074s
  * raw_skew - 2m0.013s

Thus they will be marked as failed with the current 45s setting:
  not ok 3 selftests: timers: nsleep-lat # TIMEOUT
  not ok 4 selftests: timers: set-timer-lat # TIMEOUT
  not ok 6 selftests: timers: inconsistency-check # TIMEOUT
  not ok 7 selftests: timers: raw_skew # TIMEOUT

Disable the timeout setting for timers can make these tests finish
properly:
  ok 3 selftests: timers: nsleep-lat
  ok 4 selftests: timers: set-timer-lat
  ok 6 selftests: timers: inconsistency-check
  ok 7 selftests: timers: raw_skew

https://bugs.launchpad.net/bugs/1864626
Fixes: 852c8cbf34d3 ("selftests/kselftest/runner.sh: Add 45 second timeout per test")
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
Acked-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
---
 tools/testing/selftests/timers/Makefile | 1 +
 tools/testing/selftests/timers/settings | 1 +
 2 files changed, 2 insertions(+)
 create mode 100644 tools/testing/selftests/timers/settings

diff --git a/tools/testing/selftests/timers/Makefile b/tools/testing/selftests/timers/Makefile
index 7656c7ce79d90..0e73a16874c4c 100644
--- a/tools/testing/selftests/timers/Makefile
+++ b/tools/testing/selftests/timers/Makefile
@@ -13,6 +13,7 @@ DESTRUCTIVE_TESTS = alarmtimer-suspend valid-adjtimex adjtick change_skew \
 
 TEST_GEN_PROGS_EXTENDED = $(DESTRUCTIVE_TESTS)
 
+TEST_FILES := settings
 
 include ../lib.mk
 
diff --git a/tools/testing/selftests/timers/settings b/tools/testing/selftests/timers/settings
new file mode 100644
index 0000000000000..e7b9417537fbc
--- /dev/null
+++ b/tools/testing/selftests/timers/settings
@@ -0,0 +1 @@
+timeout=0
-- 
GitLab


From 4d820543c54c47a2bd3c95ddbf52f83c89a219a0 Mon Sep 17 00:00:00 2001
From: Haiyang Zhang <haiyangz@microsoft.com>
Date: Thu, 20 Aug 2020 14:53:14 -0700
Subject: [PATCH 0378/1341] hv_netvsc: Remove "unlikely" from
 netvsc_select_queue

When using vf_ops->ndo_select_queue, the number of queues of VF is
usually bigger than the synthetic NIC. This condition may happen
often.
Remove "unlikely" from the comparison of ndev->real_num_tx_queues.

Fixes: b3bf5666a510 ("hv_netvsc: defer queue selection to VF")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/hyperv/netvsc_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 787f17e2a9716..0029292cdb9f6 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -367,7 +367,7 @@ static u16 netvsc_select_queue(struct net_device *ndev, struct sk_buff *skb,
 	}
 	rcu_read_unlock();
 
-	while (unlikely(txq >= ndev->real_num_tx_queues))
+	while (txq >= ndev->real_num_tx_queues)
 		txq -= ndev->real_num_tx_queues;
 
 	return txq;
-- 
GitLab


From c3d897e01aef8ddc43149e4d661b86f823e3aae7 Mon Sep 17 00:00:00 2001
From: Haiyang Zhang <haiyangz@microsoft.com>
Date: Thu, 20 Aug 2020 14:53:15 -0700
Subject: [PATCH 0379/1341] hv_netvsc: Fix the queue_mapping in
 netvsc_vf_xmit()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

netvsc_vf_xmit() / dev_queue_xmit() will call VF NIC’s ndo_select_queue
or netdev_pick_tx() again. They will use skb_get_rx_queue() to get the
queue number, so the “skb->queue_mapping - 1” will be used. This may
cause the last queue of VF not been used.

Use skb_record_rx_queue() here, so that the skb_get_rx_queue() called
later will get the correct queue number, and VF will be able to use
all queues.

Fixes: b3bf5666a510 ("hv_netvsc: defer queue selection to VF")
Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/hyperv/netvsc_drv.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 0029292cdb9f6..64b0a74c15231 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -502,7 +502,7 @@ static int netvsc_vf_xmit(struct net_device *net, struct net_device *vf_netdev,
 	int rc;
 
 	skb->dev = vf_netdev;
-	skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping;
+	skb_record_rx_queue(skb, qdisc_skb_cb(skb)->slave_dev_queue_mapping);
 
 	rc = dev_queue_xmit(skb);
 	if (likely(rc == NET_XMIT_SUCCESS || rc == NET_XMIT_CN)) {
-- 
GitLab


From 272502fcb7cda01ab07fc2fcff82d1d2f73d43cc Mon Sep 17 00:00:00 2001
From: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Date: Wed, 19 Aug 2020 13:53:58 +1200
Subject: [PATCH 0380/1341] gre6: Fix reception with IP6_TNL_F_RCV_DSCP_COPY

When receiving an IPv4 packet inside an IPv6 GRE packet, and the
IP6_TNL_F_RCV_DSCP_COPY flag is set on the tunnel, the IPv4 header would
get corrupted. This is due to the common ip6_tnl_rcv() function assuming
that the inner header is always IPv6. This patch checks the tunnel
protocol for IPv4 inner packets, but still defaults to IPv6.

Fixes: 308edfdf1563 ("gre6: Cleanup GREv6 receive path, call common GRE functions")
Signed-off-by: Mark Tomlinson <mark.tomlinson@alliedtelesis.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ipv6/ip6_tunnel.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index f635914f42ec6..a0217e5bf3bc1 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -915,7 +915,15 @@ int ip6_tnl_rcv(struct ip6_tnl *t, struct sk_buff *skb,
 		struct metadata_dst *tun_dst,
 		bool log_ecn_err)
 {
-	return __ip6_tnl_rcv(t, skb, tpi, tun_dst, ip6ip6_dscp_ecn_decapsulate,
+	int (*dscp_ecn_decapsulate)(const struct ip6_tnl *t,
+				    const struct ipv6hdr *ipv6h,
+				    struct sk_buff *skb);
+
+	dscp_ecn_decapsulate = ip6ip6_dscp_ecn_decapsulate;
+	if (tpi->proto == htons(ETH_P_IP))
+		dscp_ecn_decapsulate = ip4ip6_dscp_ecn_decapsulate;
+
+	return __ip6_tnl_rcv(t, skb, tpi, tun_dst, dscp_ecn_decapsulate,
 			     log_ecn_err);
 }
 EXPORT_SYMBOL(ip6_tnl_rcv);
-- 
GitLab


From 41506bff84f1563e20e505ca9a0366a30ae2a879 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Wed, 19 Aug 2020 14:45:39 +0200
Subject: [PATCH 0381/1341] dt-bindings: net: renesas, ether: Improve schema
 validation

- Remove pinctrl consumer properties, as they are handled by core
    dt-schema,
  - Document missing properties,
  - Document missing PHY child node,
  - Add "additionalProperties: false".

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../bindings/net/renesas,ether.yaml           | 22 +++++++++++++------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/renesas,ether.yaml b/Documentation/devicetree/bindings/net/renesas,ether.yaml
index 08678af5ed936..8ce5ed8a58dd7 100644
--- a/Documentation/devicetree/bindings/net/renesas,ether.yaml
+++ b/Documentation/devicetree/bindings/net/renesas,ether.yaml
@@ -59,9 +59,15 @@ properties:
   clocks:
     maxItems: 1
 
-  pinctrl-0: true
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
 
-  pinctrl-names: true
+  phy-mode: true
+
+  phy-handle: true
 
   renesas,no-ether-link:
     type: boolean
@@ -74,6 +80,11 @@ properties:
       specify when the Ether LINK signal is active-low instead of normal
       active-high
 
+patternProperties:
+  "^ethernet-phy@[0-9a-f]$":
+    type: object
+    $ref: ethernet-phy.yaml#
+
 required:
   - compatible
   - reg
@@ -83,7 +94,8 @@ required:
   - '#address-cells'
   - '#size-cells'
   - clocks
-  - pinctrl-0
+
+additionalProperties: false
 
 examples:
   # Lager board
@@ -99,8 +111,6 @@ examples:
         clocks = <&mstp8_clks R8A7790_CLK_ETHER>;
         phy-mode = "rmii";
         phy-handle = <&phy1>;
-        pinctrl-0 = <&ether_pins>;
-        pinctrl-names = "default";
         renesas,ether-link-active-low;
         #address-cells = <1>;
         #size-cells = <0>;
@@ -109,7 +119,5 @@ examples:
             reg = <1>;
             interrupt-parent = <&irqc0>;
             interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
-            pinctrl-0 = <&phy1_pins>;
-            pinctrl-names = "default";
         };
     };
-- 
GitLab


From ab921f3cdbec01c68705a7ade8bec628d541fc2b Mon Sep 17 00:00:00 2001
From: David Laight <David.Laight@ACULAB.COM>
Date: Wed, 19 Aug 2020 14:40:52 +0000
Subject: [PATCH 0382/1341] net: sctp: Fix negotiation of the number of data
 streams.

The number of output and input streams was never being reduced, eg when
processing received INIT or INIT_ACK chunks.
The effect is that DATA chunks can be sent with invalid stream ids
and then discarded by the remote system.

Fixes: 2075e50caf5ea ("sctp: convert to genradix")
Signed-off-by: David Laight <david.laight@aculab.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/sctp/stream.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/net/sctp/stream.c b/net/sctp/stream.c
index bda2536dd740f..6dc95dcc0ff4f 100644
--- a/net/sctp/stream.c
+++ b/net/sctp/stream.c
@@ -88,12 +88,13 @@ static int sctp_stream_alloc_out(struct sctp_stream *stream, __u16 outcnt,
 	int ret;
 
 	if (outcnt <= stream->outcnt)
-		return 0;
+		goto out;
 
 	ret = genradix_prealloc(&stream->out, outcnt, gfp);
 	if (ret)
 		return ret;
 
+out:
 	stream->outcnt = outcnt;
 	return 0;
 }
@@ -104,12 +105,13 @@ static int sctp_stream_alloc_in(struct sctp_stream *stream, __u16 incnt,
 	int ret;
 
 	if (incnt <= stream->incnt)
-		return 0;
+		goto out;
 
 	ret = genradix_prealloc(&stream->in, incnt, gfp);
 	if (ret)
 		return ret;
 
+out:
 	stream->incnt = incnt;
 	return 0;
 }
-- 
GitLab


From eda814b97dfb8d9f4808eb2f65af9bd3705c4cae Mon Sep 17 00:00:00 2001
From: Alaa Hleihel <alaa@mellanox.com>
Date: Wed, 19 Aug 2020 18:24:10 +0300
Subject: [PATCH 0383/1341] net/sched: act_ct: Fix skb double-free in
 tcf_ct_handle_fragments() error flow

tcf_ct_handle_fragments() shouldn't free the skb when ip_defrag() call
fails. Otherwise, we will cause a double-free bug.
In such cases, just return the error to the caller.

Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct")
Signed-off-by: Alaa Hleihel <alaa@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/sched/act_ct.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sched/act_ct.c b/net/sched/act_ct.c
index e6ad42b11835f..2c3619165680f 100644
--- a/net/sched/act_ct.c
+++ b/net/sched/act_ct.c
@@ -704,7 +704,7 @@ static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb,
 		err = ip_defrag(net, skb, user);
 		local_bh_enable();
 		if (err && err != -EINPROGRESS)
-			goto out_free;
+			return err;
 
 		if (!err) {
 			*defrag = true;
-- 
GitLab


From f6db9096416209474090d64d8284e7c16c3d8873 Mon Sep 17 00:00:00 2001
From: Xin Long <lucien.xin@gmail.com>
Date: Thu, 20 Aug 2020 15:34:47 +0800
Subject: [PATCH 0384/1341] tipc: call rcu_read_lock() in
 tipc_aead_encrypt_done()

b->media->send_msg() requires rcu_read_lock(), as we can see
elsewhere in tipc,  tipc_bearer_xmit, tipc_bearer_xmit_skb
and tipc_bearer_bc_xmit().

Syzbot has reported this issue as:

  net/tipc/bearer.c:466 suspicious rcu_dereference_check() usage!
  Workqueue: cryptd cryptd_queue_worker
  Call Trace:
   tipc_l2_send_msg+0x354/0x420 net/tipc/bearer.c:466
   tipc_aead_encrypt_done+0x204/0x3a0 net/tipc/crypto.c:761
   cryptd_aead_crypt+0xe8/0x1d0 crypto/cryptd.c:739
   cryptd_queue_worker+0x118/0x1b0 crypto/cryptd.c:181
   process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
   worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
   kthread+0x3b5/0x4a0 kernel/kthread.c:291
   ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

So fix it by calling rcu_read_lock() in tipc_aead_encrypt_done()
for b->media->send_msg().

Fixes: fc1b6d6de220 ("tipc: introduce TIPC encryption & authentication")
Reported-by: syzbot+47bbc6b678d317cccbe0@syzkaller.appspotmail.com
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/tipc/crypto.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c
index 001bcb0f2480d..c38babaa4e579 100644
--- a/net/tipc/crypto.c
+++ b/net/tipc/crypto.c
@@ -757,10 +757,12 @@ static void tipc_aead_encrypt_done(struct crypto_async_request *base, int err)
 	switch (err) {
 	case 0:
 		this_cpu_inc(tx->stats->stat[STAT_ASYNC_OK]);
+		rcu_read_lock();
 		if (likely(test_bit(0, &b->up)))
 			b->media->send_msg(net, skb, b, &tx_ctx->dst);
 		else
 			kfree_skb(skb);
+		rcu_read_unlock();
 		break;
 	case -EINPROGRESS:
 		return;
-- 
GitLab


From bf53f463099016dddd12acfed6a025bb780cd504 Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Thu, 20 Aug 2020 10:57:52 +0200
Subject: [PATCH 0385/1341] ARM: configs: Update Integrator defconfig

Update the Integrator defconfig to the changes from the recent
kernel cycles and especially the v5.9-rc1 changes.

- Move options around as a result of Kconfig changes.
- Drop the ZBOOT_ROM* stuff that doesn't exist anymore.
- Select GPIO input and evdev as used by the pushbuttons
  on the machine.
- Select CONFIG_DRM_DISPLAY_CONNECTOR=y, the
  CONFIG_DRM_SIMPLE_BRIDGE was renamed when renaming the
  driver, but the simple bridge requires another bridge,
  the display connector bridge, in order to work, so this
  is required to have graphics working properly in kernel
  v5.9-rc1+

Link: https://lore.kernel.org/r/20200820085752.42994-1-linus.walleij@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
---
 arch/arm/configs/integrator_defconfig | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/arm/configs/integrator_defconfig b/arch/arm/configs/integrator_defconfig
index a9755c501bec4..b06e537d51490 100644
--- a/arch/arm/configs/integrator_defconfig
+++ b/arch/arm/configs/integrator_defconfig
@@ -1,13 +1,11 @@
 CONFIG_SYSVIPC=y
 CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
+CONFIG_PREEMPT=y
 CONFIG_IKCONFIG=y
 CONFIG_IKCONFIG_PROC=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_BLK_DEV_INITRD=y
-CONFIG_MODULES=y
-CONFIG_MODULE_UNLOAD=y
-CONFIG_PARTITION_ADVANCED=y
 CONFIG_ARCH_MULTI_V4T=y
 CONFIG_ARCH_MULTI_V5=y
 # CONFIG_ARCH_MULTI_V7 is not set
@@ -15,19 +13,17 @@ CONFIG_ARCH_INTEGRATOR=y
 CONFIG_ARCH_INTEGRATOR_AP=y
 CONFIG_INTEGRATOR_IMPD1=y
 CONFIG_ARCH_INTEGRATOR_CP=y
-CONFIG_PCI=y
-CONFIG_PREEMPT=y
 CONFIG_AEABI=y
 # CONFIG_ATAGS is not set
-CONFIG_ZBOOT_ROM_TEXT=0x0
-CONFIG_ZBOOT_ROM_BSS=0x0
 CONFIG_CMDLINE="console=ttyAM0,38400n8 root=/dev/nfs ip=bootp"
 CONFIG_CPU_FREQ=y
 CONFIG_CPU_FREQ_GOV_POWERSAVE=y
 CONFIG_CPU_FREQ_GOV_USERSPACE=y
 CONFIG_CPU_FREQ_GOV_ONDEMAND=y
 CONFIG_CPUFREQ_DT=y
-CONFIG_CMA=y
+CONFIG_MODULES=y
+CONFIG_MODULE_UNLOAD=y
+CONFIG_PARTITION_ADVANCED=y
 CONFIG_NET=y
 CONFIG_PACKET=y
 CONFIG_UNIX=y
@@ -37,6 +33,7 @@ CONFIG_IP_PNP=y
 CONFIG_IP_PNP_DHCP=y
 CONFIG_IP_PNP_BOOTP=y
 # CONFIG_IPV6 is not set
+CONFIG_PCI=y
 CONFIG_MTD=y
 CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_AFS_PARTS=y
@@ -52,9 +49,12 @@ CONFIG_BLK_DEV_RAM_SIZE=8192
 CONFIG_NETDEVICES=y
 CONFIG_E100=y
 CONFIG_SMC91X=y
+CONFIG_INPUT_EVDEV=y
 # CONFIG_KEYBOARD_ATKBD is not set
+CONFIG_KEYBOARD_GPIO=y
 # CONFIG_SERIO_SERPORT is not set
 CONFIG_DRM=y
+CONFIG_DRM_DISPLAY_CONNECTOR=y
 CONFIG_DRM_SIMPLE_BRIDGE=y
 CONFIG_DRM_PL111=y
 CONFIG_FB_MODE_HELPERS=y
-- 
GitLab


From 3b574ea2f89321d0a428286be0057340f0313323 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Mon, 17 Aug 2020 08:56:53 +0200
Subject: [PATCH 0386/1341] arm64: defconfig: Enable USB gadget with configfs

USB OTG connections are pretty common for embedded and development
boards, for example to have networking or serial access to the device.
Build as a module the USB gadget configfs options so the defconfig can
be used in such development configurations.

Link: https://lore.kernel.org/r/20200817065654.4419-1-krzk@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
---
 arch/arm64/configs/defconfig | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index e0f33826819f1..0b0b30efc0f52 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -724,6 +724,17 @@ CONFIG_USB_GADGET=y
 CONFIG_USB_RENESAS_USBHS_UDC=m
 CONFIG_USB_RENESAS_USB3=m
 CONFIG_USB_TEGRA_XUDC=m
+CONFIG_USB_CONFIGFS=m
+CONFIG_USB_CONFIGFS_SERIAL=y
+CONFIG_USB_CONFIGFS_ACM=y
+CONFIG_USB_CONFIGFS_OBEX=y
+CONFIG_USB_CONFIGFS_NCM=y
+CONFIG_USB_CONFIGFS_ECM=y
+CONFIG_USB_CONFIGFS_ECM_SUBSET=y
+CONFIG_USB_CONFIGFS_RNDIS=y
+CONFIG_USB_CONFIGFS_EEM=y
+CONFIG_USB_CONFIGFS_MASS_STORAGE=y
+CONFIG_USB_CONFIGFS_F_FS=y
 CONFIG_TYPEC=m
 CONFIG_TYPEC_TCPM=m
 CONFIG_TYPEC_FUSB302=m
-- 
GitLab


From 1ebda87ad906b732af5660c3ee2e896a13292545 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Mon, 17 Aug 2020 08:56:54 +0200
Subject: [PATCH 0387/1341] arm64: defconfig: Enable ptn5150 extcon driver

Enable the extcon driver for NXP PTN5150A chips (CC logic for USB Type-C
applications) present on some of i.MX8 evaluation boards (e.g. Variscite
Symphony board).

Link: https://lore.kernel.org/r/20200817065654.4419-2-krzk@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 0b0b30efc0f52..6d04b9577b0bd 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -925,6 +925,7 @@ CONFIG_ARCH_TEGRA_194_SOC=y
 CONFIG_ARCH_K3_AM6_SOC=y
 CONFIG_ARCH_K3_J721E_SOC=y
 CONFIG_TI_SCI_PM_DOMAINS=y
+CONFIG_EXTCON_PTN5150=m
 CONFIG_EXTCON_USB_GPIO=y
 CONFIG_EXTCON_USBC_CROS_EC=y
 CONFIG_IIO=y
-- 
GitLab


From 53efe2e76ca2bfad7f35e0b5330e2ccd44a643e3 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Fri, 21 Aug 2020 00:16:46 +0900
Subject: [PATCH 0388/1341] kconfig: qconf: remove qInfo() to get back Qt4
 support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

qconf is supposed to work with Qt4 and Qt5, but since commit
c4f7398bee9c ("kconfig: qconf: make debug links work again"),
building with Qt4 fails as follows:

  HOSTCXX scripts/kconfig/qconf.o
scripts/kconfig/qconf.cc: In member function ‘void ConfigInfoView::clicked(const QUrl&)’:
scripts/kconfig/qconf.cc:1241:3: error: ‘qInfo’ was not declared in this scope; did you mean ‘setInfo’?
 1241 |   qInfo() << "Clicked link is empty";
      |   ^~~~~
      |   setInfo
scripts/kconfig/qconf.cc:1254:3: error: ‘qInfo’ was not declared in this scope; did you mean ‘setInfo’?
 1254 |   qInfo() << "Clicked symbol is invalid:" << data;
      |   ^~~~~
      |   setInfo
make[1]: *** [scripts/Makefile.host:129: scripts/kconfig/qconf.o] Error 1
make: *** [Makefile:606: xconfig] Error 2

qInfo() does not exist in Qt4. In my understanding, these call-sites
should be unreachable. Perhaps, qWarning(), assertion, or something
is better, but qInfo() is not the right one to use here, I think.

Fixes: c4f7398bee9c ("kconfig: qconf: make debug links work again")
Reported-by: Ronald Warsow <rwarsow@gmx.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 2 --
 1 file changed, 2 deletions(-)

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 5a0aa159ec80a..3a8f6251a727d 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1238,7 +1238,6 @@ void ConfigInfoView::clicked(const QUrl &url)
 	struct menu *m = NULL;
 
 	if (count < 1) {
-		qInfo() << "Clicked link is empty";
 		delete[] data;
 		return;
 	}
@@ -1251,7 +1250,6 @@ void ConfigInfoView::clicked(const QUrl &url)
 	strcat(data, "$");
 	result = sym_re_search(data);
 	if (!result) {
-		qInfo() << "Clicked symbol is invalid:" << data;
 		delete[] data;
 		return;
 	}
-- 
GitLab


From 68fd110b3e7e2c90d781a132cc4362fbfb4a95a1 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Fri, 21 Aug 2020 02:43:27 +0900
Subject: [PATCH 0389/1341] kconfig: qconf: remove redundant help in the info
 view

The same information is repeated in the info view.

Remove the second one.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 3a8f6251a727d..4c5688a845f85 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1106,11 +1106,6 @@ void ConfigInfoView::menuInfo(void)
 
 		if (showDebug())
 			debug = debug_info(sym);
-
-		struct gstr help_gstr = str_new();
-		menu_get_ext_help(_menu, &help_gstr);
-		help = print_filter(str_get(&help_gstr));
-		str_free(&help_gstr);
 	} else if (_menu->prompt) {
 		head += "<big><b>";
 		head += print_filter(_menu->prompt->text);
@@ -1126,7 +1121,7 @@ void ConfigInfoView::menuInfo(void)
 	if (showDebug())
 		debug += QString().sprintf("defined at %s:%d<br><br>", _menu->file->name, _menu->lineno);
 
-	setText(head + debug + help);
+	setText(head + debug);
 }
 
 QString ConfigInfoView::debug_info(struct symbol *sym)
-- 
GitLab


From 510bc3cb1ddc32f9533e6ed0a68c980544c3ca3f Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Fri, 21 Aug 2020 02:43:28 +0900
Subject: [PATCH 0390/1341] kconfig: qconf: replace deprecated
 QString::sprintf() with QTextStream
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

QString::sprintf() is deprecated in the latest Qt version, and spawns
a lot of warnings:

  HOSTCXX scripts/kconfig/qconf.o
scripts/kconfig/qconf.cc: In member function ‘void ConfigInfoView::menuInfo()’:
scripts/kconfig/qconf.cc:1090:61: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1090 |      head += QString().sprintf("<a href=\"s%s\">", sym->name);
      |                                                             ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~
scripts/kconfig/qconf.cc:1099:60: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1099 |     head += QString().sprintf("<a href=\"s%s\">", sym->name);
      |                                                            ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~
scripts/kconfig/qconf.cc:1127:90: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1127 |   debug += QString().sprintf("defined at %s:%d<br><br>", _menu->file->name, _menu->lineno);
      |                                                                                          ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~
scripts/kconfig/qconf.cc: In member function ‘QString ConfigInfoView::debug_info(symbol*)’:
scripts/kconfig/qconf.cc:1150:68: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1150 |    debug += QString().sprintf("prompt: <a href=\"m%s\">", sym->name);
      |                                                                    ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~
scripts/kconfig/qconf.cc: In static member function ‘static void ConfigInfoView::expr_print_help(void*, symbol*, const char*)’:
scripts/kconfig/qconf.cc:1225:59: warning: ‘QString& QString::sprintf(const char*, ...)’ is deprecated: Use asprintf(), arg() or QTextStream instead [-Wdeprecated-declarations]
 1225 |   *text += QString().sprintf("<a href=\"s%s\">", sym->name);
      |                                                           ^
In file included from /usr/include/qt5/QtGui/qkeysequence.h:44,
                 from /usr/include/qt5/QtWidgets/qaction.h:44,
                 from /usr/include/qt5/QtWidgets/QAction:1,
                 from scripts/kconfig/qconf.cc:7:
/usr/include/qt5/QtCore/qstring.h:382:14: note: declared here
  382 |     QString &sprintf(const char *format, ...) Q_ATTRIBUTE_FORMAT_PRINTF(2, 3);
      |              ^~~~~~~

The documentation also says:
"Warning: We do not recommend using QString::asprintf() in new Qt code.
Instead, consider using QTextStream or arg(), both of which support
Unicode strings seamlessly and are type-safe."

Use QTextStream as suggested.

Reported-by: Robert Crawford <flacycads@cox.net>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 116 +++++++++++++++++++++------------------
 1 file changed, 62 insertions(+), 54 deletions(-)

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 4c5688a845f85..8638785328a7f 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1076,75 +1076,80 @@ void ConfigInfoView::symbolInfo(void)
 void ConfigInfoView::menuInfo(void)
 {
 	struct symbol* sym;
-	QString head, debug, help;
+	QString info;
+	QTextStream stream(&info);
 
 	sym = _menu->sym;
 	if (sym) {
 		if (_menu->prompt) {
-			head += "<big><b>";
-			head += print_filter(_menu->prompt->text);
-			head += "</b></big>";
+			stream << "<big><b>";
+			stream << print_filter(_menu->prompt->text);
+			stream << "</b></big>";
 			if (sym->name) {
-				head += " (";
+				stream << " (";
 				if (showDebug())
-					head += QString().sprintf("<a href=\"s%s\">", sym->name);
-				head += print_filter(sym->name);
+					stream << "<a href=\"s" << sym->name << "\">";
+				stream << print_filter(sym->name);
 				if (showDebug())
-					head += "</a>";
-				head += ")";
+					stream << "</a>";
+				stream << ")";
 			}
 		} else if (sym->name) {
-			head += "<big><b>";
+			stream << "<big><b>";
 			if (showDebug())
-				head += QString().sprintf("<a href=\"s%s\">", sym->name);
-			head += print_filter(sym->name);
+				stream << "<a href=\"s" << sym->name << "\">";
+			stream << print_filter(sym->name);
 			if (showDebug())
-				head += "</a>";
-			head += "</b></big>";
+				stream << "</a>";
+			stream << "</b></big>";
 		}
-		head += "<br><br>";
+		stream << "<br><br>";
 
 		if (showDebug())
-			debug = debug_info(sym);
+			stream << debug_info(sym);
+
 	} else if (_menu->prompt) {
-		head += "<big><b>";
-		head += print_filter(_menu->prompt->text);
-		head += "</b></big><br><br>";
+		stream << "<big><b>";
+		stream << print_filter(_menu->prompt->text);
+		stream << "</b></big><br><br>";
 		if (showDebug()) {
 			if (_menu->prompt->visible.expr) {
-				debug += "&nbsp;&nbsp;dep: ";
-				expr_print(_menu->prompt->visible.expr, expr_print_help, &debug, E_NONE);
-				debug += "<br><br>";
+				stream << "&nbsp;&nbsp;dep: ";
+				expr_print(_menu->prompt->visible.expr,
+					   expr_print_help, &stream, E_NONE);
+				stream << "<br><br>";
 			}
 		}
 	}
 	if (showDebug())
-		debug += QString().sprintf("defined at %s:%d<br><br>", _menu->file->name, _menu->lineno);
+		stream << "defined at " << _menu->file->name << ":"
+		       << _menu->lineno << "<br><br>";
 
-	setText(head + debug);
+	setText(info);
 }
 
 QString ConfigInfoView::debug_info(struct symbol *sym)
 {
 	QString debug;
+	QTextStream stream(&debug);
 
-	debug += "type: ";
-	debug += print_filter(sym_type_name(sym->type));
+	stream << "type: ";
+	stream << print_filter(sym_type_name(sym->type));
 	if (sym_is_choice(sym))
-		debug += " (choice)";
+		stream << " (choice)";
 	debug += "<br>";
 	if (sym->rev_dep.expr) {
-		debug += "reverse dep: ";
-		expr_print(sym->rev_dep.expr, expr_print_help, &debug, E_NONE);
-		debug += "<br>";
+		stream << "reverse dep: ";
+		expr_print(sym->rev_dep.expr, expr_print_help, &stream, E_NONE);
+		stream << "<br>";
 	}
 	for (struct property *prop = sym->prop; prop; prop = prop->next) {
 		switch (prop->type) {
 		case P_PROMPT:
 		case P_MENU:
-			debug += QString().sprintf("prompt: <a href=\"m%s\">", sym->name);
-			debug += print_filter(prop->text);
-			debug += "</a><br>";
+			stream << "prompt: <a href=\"m" << sym->name << "\">";
+			stream << print_filter(prop->text);
+			stream << "</a><br>";
 			break;
 		case P_DEFAULT:
 		case P_SELECT:
@@ -1152,30 +1157,33 @@ QString ConfigInfoView::debug_info(struct symbol *sym)
 		case P_COMMENT:
 		case P_IMPLY:
 		case P_SYMBOL:
-			debug += prop_get_type_name(prop->type);
-			debug += ": ";
-			expr_print(prop->expr, expr_print_help, &debug, E_NONE);
-			debug += "<br>";
+			stream << prop_get_type_name(prop->type);
+			stream << ": ";
+			expr_print(prop->expr, expr_print_help,
+				   &stream, E_NONE);
+			stream << "<br>";
 			break;
 		case P_CHOICE:
 			if (sym_is_choice(sym)) {
-				debug += "choice: ";
-				expr_print(prop->expr, expr_print_help, &debug, E_NONE);
-				debug += "<br>";
+				stream << "choice: ";
+				expr_print(prop->expr, expr_print_help,
+					   &stream, E_NONE);
+				stream << "<br>";
 			}
 			break;
 		default:
-			debug += "unknown property: ";
-			debug += prop_get_type_name(prop->type);
-			debug += "<br>";
+			stream << "unknown property: ";
+			stream << prop_get_type_name(prop->type);
+			stream << "<br>";
 		}
 		if (prop->visible.expr) {
-			debug += "&nbsp;&nbsp;&nbsp;&nbsp;dep: ";
-			expr_print(prop->visible.expr, expr_print_help, &debug, E_NONE);
-			debug += "<br>";
+			stream << "&nbsp;&nbsp;&nbsp;&nbsp;dep: ";
+			expr_print(prop->visible.expr, expr_print_help,
+				   &stream, E_NONE);
+			stream << "<br>";
 		}
 	}
-	debug += "<br>";
+	stream << "<br>";
 
 	return debug;
 }
@@ -1213,15 +1221,15 @@ QString ConfigInfoView::print_filter(const QString &str)
 
 void ConfigInfoView::expr_print_help(void *data, struct symbol *sym, const char *str)
 {
-	QString* text = reinterpret_cast<QString*>(data);
-	QString str2 = print_filter(str);
+	QTextStream *stream = reinterpret_cast<QTextStream *>(data);
 
 	if (sym && sym->name && !(sym->flags & SYMBOL_CONST)) {
-		*text += QString().sprintf("<a href=\"s%s\">", sym->name);
-		*text += str2;
-		*text += "</a>";
-	} else
-		*text += str2;
+		*stream << "<a href=\"s" << sym->name << "\">";
+		*stream << print_filter(str);
+		*stream << "</a>";
+	} else {
+		*stream << print_filter(str);
+	}
 }
 
 void ConfigInfoView::clicked(const QUrl &url)
-- 
GitLab


From 9a5a668dc348f98de464114411421c4e9381cf21 Mon Sep 17 00:00:00 2001
From: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Date: Thu, 30 Jul 2020 13:27:42 +0100
Subject: [PATCH 0391/1341] crypto: qat - add delay before polling mailbox

The mailbox CSR register has a write latency and requires a delay before
being read. This patch replaces readl_poll_timeout with read_poll_timeout
that allows to sleep before read.
The initial sleep was removed when the mailbox poll loop was replaced with
readl_poll_timeout.

Fixes: a79d471c6510 ("crypto: qat - update timeout logic in put admin msg")
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/crypto/qat/qat_common/adf_admin.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/crypto/qat/qat_common/adf_admin.c b/drivers/crypto/qat/qat_common/adf_admin.c
index 1c8ca151a9635..ec9b390276d6f 100644
--- a/drivers/crypto/qat/qat_common/adf_admin.c
+++ b/drivers/crypto/qat/qat_common/adf_admin.c
@@ -131,9 +131,10 @@ static int adf_put_admin_msg_sync(struct adf_accel_dev *accel_dev, u32 ae,
 	memcpy(admin->virt_addr + offset, in, ADF_ADMINMSG_LEN);
 	ADF_CSR_WR(mailbox, mb_offset, 1);
 
-	ret = readl_poll_timeout(mailbox + mb_offset, status,
-				 status == 0, ADF_ADMIN_POLL_DELAY_US,
-				 ADF_ADMIN_POLL_TIMEOUT_US);
+	ret = read_poll_timeout(ADF_CSR_RD, status, status == 0,
+				ADF_ADMIN_POLL_DELAY_US,
+				ADF_ADMIN_POLL_TIMEOUT_US, true,
+				mailbox, mb_offset);
 	if (ret < 0) {
 		/* Response timeout */
 		dev_err(&GET_DEV(accel_dev),
-- 
GitLab


From 11a954eebc4396b51af745e5242df05f71be6d9e Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Tue, 4 Aug 2020 08:11:53 +0000
Subject: [PATCH 0392/1341] crypto: ingenic - Drop kfree for memory allocated
 with devm_kzalloc
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

It's not necessary to free memory allocated with devm_kzalloc
and using kfree leads to a double free.

Fixes: 190873a0ea45 ("crypto: ingenic - Add hardware RNG for Ingenic JZ4780 and X1000")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/char/hw_random/ingenic-rng.c | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/drivers/char/hw_random/ingenic-rng.c b/drivers/char/hw_random/ingenic-rng.c
index d704cef64b64a..055cfe59f519d 100644
--- a/drivers/char/hw_random/ingenic-rng.c
+++ b/drivers/char/hw_random/ingenic-rng.c
@@ -92,8 +92,7 @@ static int ingenic_rng_probe(struct platform_device *pdev)
 	priv->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(priv->base)) {
 		pr_err("%s: Failed to map RNG registers\n", __func__);
-		ret = PTR_ERR(priv->base);
-		goto err_free_rng;
+		return PTR_ERR(priv->base);
 	}
 
 	priv->version = (enum ingenic_rng_version)of_device_get_match_data(&pdev->dev);
@@ -106,17 +105,13 @@ static int ingenic_rng_probe(struct platform_device *pdev)
 	ret = hwrng_register(&priv->rng);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to register hwrng\n");
-		goto err_free_rng;
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, priv);
 
 	dev_info(&pdev->dev, "Ingenic RNG driver registered\n");
 	return 0;
-
-err_free_rng:
-	kfree(priv);
-	return ret;
 }
 
 static int ingenic_rng_remove(struct platform_device *pdev)
-- 
GitLab


From bfe8fe939a049e99e1bda0f81e72a612e83ab446 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Thu, 6 Aug 2020 08:54:48 -0700
Subject: [PATCH 0393/1341] crypto: sa2ul - add Kconfig selects to fix build
 error

sa2ul.c uses sha{1,256,512}_zero_message_hash, so select the
Kconfig symbols that provide those, like other crypto drivers do.

Fixes this build error:

ld: drivers/crypto/sa2ul.o: in function `sa_sha_digest':
sa2ul.c:(.text+0x2b25): undefined reference to `sha512_zero_message_hash'

Fixes: 7694b6ca649f ("crypto: sa2ul - Add crypto driver")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Randy Dunlap <rdunlap@infradead.org> # 2020-07-29
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Cc: Tero Kristo <t-kristo@ti.com>
Cc: Keerthy <j-keerthy@ti.com>
Reviewed-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 drivers/crypto/Kconfig | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/crypto/Kconfig b/drivers/crypto/Kconfig
index aa3a4ed07a666..52a9b7cf6576f 100644
--- a/drivers/crypto/Kconfig
+++ b/drivers/crypto/Kconfig
@@ -873,6 +873,9 @@ config CRYPTO_DEV_SA2UL
 	select CRYPTO_AES
 	select CRYPTO_AES_ARM64
 	select CRYPTO_ALGAPI
+	select CRYPTO_SHA1
+	select CRYPTO_SHA256
+	select CRYPTO_SHA512
 	select HW_RANDOM
 	select SG_SPLIT
 	help
-- 
GitLab


From dbfc95f98f0158958d1f1e6bf06d74be38dbd821 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Wed, 19 Aug 2020 11:26:44 -0700
Subject: [PATCH 0394/1341] MIPS: mm: BMIPS5000 has inclusive physical caches

When the BMIPS generic cpu-feature-overrides.h file was introduced,
cpu_has_inclusive_caches/MIPS_CPU_INCLUSIVE_CACHES was not set for
BMIPS5000 CPUs. Correct this when we have initialized the MIPS secondary
cache successfully.

Fixes: f337967d6d87 ("MIPS: BMIPS: Add cpu-feature-overrides.h")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/mm/c-r4k.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c
index fc5a6d25f74ff..0ef717093262f 100644
--- a/arch/mips/mm/c-r4k.c
+++ b/arch/mips/mm/c-r4k.c
@@ -1712,7 +1712,11 @@ static void setup_scache(void)
 				printk("MIPS secondary cache %ldkB, %s, linesize %d bytes.\n",
 				       scache_size >> 10,
 				       way_string[c->scache.ways], c->scache.linesz);
+
+				if (current_cpu_type() == CPU_BMIPS5000)
+					c->options |= MIPS_CPU_INCLUSIVE_CACHES;
 			}
+
 #else
 			if (!(c->scache.flags & MIPS_CACHE_NOT_PRESENT))
 				panic("Dunno how to handle MIPS32 / MIPS64 second level cache");
-- 
GitLab


From e14f633b66902615cf7faa5d032b45ab8b6fb158 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Wed, 19 Aug 2020 11:26:45 -0700
Subject: [PATCH 0395/1341] MIPS: BMIPS: Also call bmips_cpu_setup() for
 secondary cores

The initialization done by bmips_cpu_setup() typically affects both
threads of a given core, on 7435 which supports 2 cores and 2 threads,
logical CPU number 2 and 3 would not run this initialization.

Fixes: 738a3f79027b ("MIPS: BMIPS: Add early CPU initialization code")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/kernel/smp-bmips.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c
index 2f513506a3d52..1dbfb5aadffd6 100644
--- a/arch/mips/kernel/smp-bmips.c
+++ b/arch/mips/kernel/smp-bmips.c
@@ -239,6 +239,8 @@ static int bmips_boot_secondary(int cpu, struct task_struct *idle)
  */
 static void bmips_init_secondary(void)
 {
+	bmips_cpu_setup();
+
 	switch (current_cpu_type()) {
 	case CPU_BMIPS4350:
 	case CPU_BMIPS4380:
-- 
GitLab


From 61d7437ed13906984c44697970ee792ac6271a31 Mon Sep 17 00:00:00 2001
From: Raul E Rangel <rrangel@chromium.org>
Date: Wed, 19 Aug 2020 13:00:19 -0600
Subject: [PATCH 0396/1341] mmc: sdhci-acpi: Fix HS400 tuning for AMDI0040

The AMD eMMC Controller can only use the tuned clock while in HS200 and
HS400 mode. If we switch to a different mode, we need to disable the
tuned clock. If we have previously performed tuning and switch back to
HS200 or HS400, we can re-enable the tuned clock.

Previously the tuned clock was not getting disabled when switching to
DDR52 which is part of the HS400 tuning sequence.

Fixes: 34597a3f60b1 ("mmc: sdhci-acpi: Add support for ACPI HID of AMD Controller with HS400")
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20200819125832.v2.1.Ie8f0689ec9f449203328b37409d1cf06b565f331@changeid
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/sdhci-acpi.c | 67 +++++++++++++++++++++++++++++------
 1 file changed, 57 insertions(+), 10 deletions(-)

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index 48ecbd0b180d8..962f074ca1742 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -535,6 +535,11 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_qcom_sd = {
 	.caps    = MMC_CAP_NONREMOVABLE,
 };
 
+struct amd_sdhci_host {
+	bool	tuned_clock;
+	bool	dll_enabled;
+};
+
 /* AMD sdhci reset dll register. */
 #define SDHCI_AMD_RESET_DLL_REGISTER    0x908
 
@@ -555,26 +560,66 @@ static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host)
 }
 
 /*
- * For AMD Platform it is required to disable the tuning
- * bit first controller to bring to HS Mode from HS200
- * mode, later enable to tune to HS400 mode.
+ * The initialization sequence for HS400 is:
+ *     HS->HS200->Perform Tuning->HS->HS400
+ *
+ * The re-tuning sequence is:
+ *     HS400->DDR52->HS->HS200->Perform Tuning->HS->HS400
+ *
+ * The AMD eMMC Controller can only use the tuned clock while in HS200 and HS400
+ * mode. If we switch to a different mode, we need to disable the tuned clock.
+ * If we have previously performed tuning and switch back to HS200 or
+ * HS400, we can re-enable the tuned clock.
+ *
  */
 static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 {
 	struct sdhci_host *host = mmc_priv(mmc);
+	struct sdhci_acpi_host *acpi_host = sdhci_priv(host);
+	struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host);
 	unsigned int old_timing = host->timing;
+	u16 val;
 
 	sdhci_set_ios(mmc, ios);
-	if (old_timing == MMC_TIMING_MMC_HS200 &&
-	    ios->timing == MMC_TIMING_MMC_HS)
-		sdhci_writew(host, 0x9, SDHCI_HOST_CONTROL2);
-	if (old_timing != MMC_TIMING_MMC_HS400 &&
-	    ios->timing == MMC_TIMING_MMC_HS400) {
-		sdhci_writew(host, 0x80, SDHCI_HOST_CONTROL2);
-		sdhci_acpi_amd_hs400_dll(host);
+
+	if (old_timing != host->timing && amd_host->tuned_clock) {
+		if (host->timing == MMC_TIMING_MMC_HS400 ||
+		    host->timing == MMC_TIMING_MMC_HS200) {
+			val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+			val |= SDHCI_CTRL_TUNED_CLK;
+			sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
+		} else {
+			val = sdhci_readw(host, SDHCI_HOST_CONTROL2);
+			val &= ~SDHCI_CTRL_TUNED_CLK;
+			sdhci_writew(host, val, SDHCI_HOST_CONTROL2);
+		}
+
+		/* DLL is only required for HS400 */
+		if (host->timing == MMC_TIMING_MMC_HS400 &&
+		    !amd_host->dll_enabled) {
+			sdhci_acpi_amd_hs400_dll(host);
+			amd_host->dll_enabled = true;
+		}
 	}
 }
 
+static int amd_sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
+{
+	int err;
+	struct sdhci_host *host = mmc_priv(mmc);
+	struct sdhci_acpi_host *acpi_host = sdhci_priv(host);
+	struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host);
+
+	amd_host->tuned_clock = false;
+
+	err = sdhci_execute_tuning(mmc, opcode);
+
+	if (!err && !host->tuning_err)
+		amd_host->tuned_clock = true;
+
+	return err;
+}
+
 static const struct sdhci_ops sdhci_acpi_ops_amd = {
 	.set_clock	= sdhci_set_clock,
 	.set_bus_width	= sdhci_set_bus_width,
@@ -602,6 +647,7 @@ static int sdhci_acpi_emmc_amd_probe_slot(struct platform_device *pdev,
 
 	host->mmc_host_ops.select_drive_strength = amd_select_drive_strength;
 	host->mmc_host_ops.set_ios = amd_set_ios;
+	host->mmc_host_ops.execute_tuning = amd_sdhci_execute_tuning;
 	return 0;
 }
 
@@ -613,6 +659,7 @@ static const struct sdhci_acpi_slot sdhci_acpi_slot_amd_emmc = {
 			  SDHCI_QUIRK_32BIT_ADMA_SIZE,
 	.quirks2	= SDHCI_QUIRK2_BROKEN_64_BIT_DMA,
 	.probe_slot     = sdhci_acpi_emmc_amd_probe_slot,
+	.priv_size	= sizeof(struct amd_sdhci_host),
 };
 
 struct sdhci_acpi_uid_slot {
-- 
GitLab


From df57d73276b863af1debc48546b0e59e44998a55 Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Wed, 19 Aug 2020 15:18:48 +0300
Subject: [PATCH 0397/1341] mmc: sdhci-pci: Fix SDHCI_RESET_ALL for CQHCI for
 Intel GLK-based controllers

For Intel controllers, SDHCI_RESET_ALL resets also CQHCI registers.
Normally, SDHCI_RESET_ALL is not used while CQHCI is enabled, but that can
happen on the error path. e.g. if mmc_cqe_recovery() fails, mmc_blk_reset()
is called which, for a eMMC that does not support HW Reset, will cycle the
bus power and the driver will perform SDHCI_RESET_ALL.

So whenever performing SDHCI_RESET_ALL ensure CQHCI is deactivated.
That will force the driver to reinitialize CQHCI when it is next used.

A similar change was done already for sdhci-msm, and other drivers using
CQHCI might benefit from a similar change, if they also have CQHCI reset
by SDHCI_RESET_ALL.

Fixes: 8ee82bda230fc9 ("mmc: sdhci-pci: Add CQHCI support for Intel GLK")
Cc: stable@vger.kernel.org # 5.4.x: 0ffa6cfbd949: mmc: cqhci: Add cqhci_deactivate()
Cc: stable@vger.kernel.org # 5.4+
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20200819121848.16967-1-adrian.hunter@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/sdhci-pci-core.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
index bb6802448b2f4..af413805bbf1a 100644
--- a/drivers/mmc/host/sdhci-pci-core.c
+++ b/drivers/mmc/host/sdhci-pci-core.c
@@ -232,6 +232,14 @@ static void sdhci_pci_dumpregs(struct mmc_host *mmc)
 	sdhci_dumpregs(mmc_priv(mmc));
 }
 
+static void sdhci_cqhci_reset(struct sdhci_host *host, u8 mask)
+{
+	if ((host->mmc->caps2 & MMC_CAP2_CQE) && (mask & SDHCI_RESET_ALL) &&
+	    host->mmc->cqe_private)
+		cqhci_deactivate(host->mmc);
+	sdhci_reset(host, mask);
+}
+
 /*****************************************************************************\
  *                                                                           *
  * Hardware specific quirk handling                                          *
@@ -718,7 +726,7 @@ static const struct sdhci_ops sdhci_intel_glk_ops = {
 	.set_power		= sdhci_intel_set_power,
 	.enable_dma		= sdhci_pci_enable_dma,
 	.set_bus_width		= sdhci_set_bus_width,
-	.reset			= sdhci_reset,
+	.reset			= sdhci_cqhci_reset,
 	.set_uhs_signaling	= sdhci_set_uhs_signaling,
 	.hw_reset		= sdhci_pci_hw_reset,
 	.irq			= sdhci_cqhci_irq,
-- 
GitLab


From fb2fecbad50964b9f27a3b182e74e437b40753ef Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@toxicpanda.com>
Date: Mon, 10 Aug 2020 17:31:16 -0400
Subject: [PATCH 0398/1341] btrfs: check the right error variable in
 btrfs_del_dir_entries_in_log

With my new locking code dbench is so much faster that I tripped over a
transaction abort from ENOSPC.  This turned out to be because
btrfs_del_dir_entries_in_log was checking for ret == -ENOSPC, but this
function sets err on error, and returns err.  So instead of properly
marking the inode as needing a full commit, we were returning -ENOSPC
and aborting in __btrfs_unlink_inode.  Fix this by checking the proper
variable so that we return the correct thing in the case of ENOSPC.

The ENOENT needs to be checked, because btrfs_lookup_dir_item_index()
can return -ENOENT if the dir item isn't in the tree log (which would
happen if we hadn't fsync'ed this guy).  We actually handle that case in
__btrfs_unlink_inode, so it's an expected error to get back.

Fixes: 4a500fd178c8 ("Btrfs: Metadata ENOSPC handling for tree log")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ add note and comment about ENOENT ]
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/tree-log.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index 696dd861cc3c6..39da9db352786 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -3449,11 +3449,13 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
 	btrfs_free_path(path);
 out_unlock:
 	mutex_unlock(&dir->log_mutex);
-	if (ret == -ENOSPC) {
+	if (err == -ENOSPC) {
 		btrfs_set_log_full_commit(trans);
-		ret = 0;
-	} else if (ret < 0)
-		btrfs_abort_transaction(trans, ret);
+		err = 0;
+	} else if (err < 0 && err != -ENOENT) {
+		/* ENOENT can be returned if the entry hasn't been fsynced yet */
+		btrfs_abort_transaction(trans, err);
+	}
 
 	btrfs_end_log_trans(root);
 
-- 
GitLab


From a84d5d429f9eb56f81b388609841ed993f0ddfca Mon Sep 17 00:00:00 2001
From: Boris Burkov <boris@bur.io>
Date: Tue, 18 Aug 2020 11:00:05 -0700
Subject: [PATCH 0399/1341] btrfs: detect nocow for swap after snapshot delete

can_nocow_extent and btrfs_cross_ref_exist both rely on a heuristic for
detecting a must cow condition which is not exactly accurate, but saves
unnecessary tree traversal. The incorrect assumption is that if the
extent was created in a generation smaller than the last snapshot
generation, it must be referenced by that snapshot. That is true, except
the snapshot could have since been deleted, without affecting the last
snapshot generation.

The original patch claimed a performance win from this check, but it
also leads to a bug where you are unable to use a swapfile if you ever
snapshotted the subvolume it's in. Make the check slower and more strict
for the swapon case, without modifying the general cow checks as a
compromise. Turning swap on does not seem to be a particularly
performance sensitive operation, so incurring a possibly unnecessary
btrfs_search_slot seems worthwhile for the added usability.

Note: Until the snapshot is competely cleaned after deletion,
check_committed_refs will still cause the logic to think that cow is
necessary, so the user must until 'btrfs subvolu sync' finished before
activating the swapfile swapon.

CC: stable@vger.kernel.org # 5.4+
Suggested-by: Omar Sandoval <osandov@osandov.com>
Signed-off-by: Boris Burkov <boris@bur.io>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/ctree.h       |  4 ++--
 fs/btrfs/extent-tree.c | 17 +++++++++++------
 fs/btrfs/file.c        |  2 +-
 fs/btrfs/inode.c       | 18 +++++++++++-------
 4 files changed, 25 insertions(+), 16 deletions(-)

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 729b5b80014ab..9a72896bed2ee 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -2518,7 +2518,7 @@ int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
 				    u64 bytenr, u64 num_bytes);
 int btrfs_exclude_logged_extents(struct extent_buffer *eb);
 int btrfs_cross_ref_exist(struct btrfs_root *root,
-			  u64 objectid, u64 offset, u64 bytenr);
+			  u64 objectid, u64 offset, u64 bytenr, bool strict);
 struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
 					     struct btrfs_root *root,
 					     u64 parent, u64 root_objectid,
@@ -2934,7 +2934,7 @@ struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
 					   u64 start, u64 len);
 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
 			      u64 *orig_start, u64 *orig_block_len,
-			      u64 *ram_bytes);
+			      u64 *ram_bytes, bool strict);
 
 void __btrfs_del_delalloc_inode(struct btrfs_root *root,
 				struct btrfs_inode *inode);
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index de6fe176fdfb3..5871ef78edbac 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -2306,7 +2306,8 @@ static noinline int check_delayed_ref(struct btrfs_root *root,
 
 static noinline int check_committed_ref(struct btrfs_root *root,
 					struct btrfs_path *path,
-					u64 objectid, u64 offset, u64 bytenr)
+					u64 objectid, u64 offset, u64 bytenr,
+					bool strict)
 {
 	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_root *extent_root = fs_info->extent_root;
@@ -2348,9 +2349,13 @@ static noinline int check_committed_ref(struct btrfs_root *root,
 	    btrfs_extent_inline_ref_size(BTRFS_EXTENT_DATA_REF_KEY))
 		goto out;
 
-	/* If extent created before last snapshot => it's definitely shared */
-	if (btrfs_extent_generation(leaf, ei) <=
-	    btrfs_root_last_snapshot(&root->root_item))
+	/*
+	 * If extent created before last snapshot => it's shared unless the
+	 * snapshot has been deleted. Use the heuristic if strict is false.
+	 */
+	if (!strict &&
+	    (btrfs_extent_generation(leaf, ei) <=
+	     btrfs_root_last_snapshot(&root->root_item)))
 		goto out;
 
 	iref = (struct btrfs_extent_inline_ref *)(ei + 1);
@@ -2375,7 +2380,7 @@ static noinline int check_committed_ref(struct btrfs_root *root,
 }
 
 int btrfs_cross_ref_exist(struct btrfs_root *root, u64 objectid, u64 offset,
-			  u64 bytenr)
+			  u64 bytenr, bool strict)
 {
 	struct btrfs_path *path;
 	int ret;
@@ -2386,7 +2391,7 @@ int btrfs_cross_ref_exist(struct btrfs_root *root, u64 objectid, u64 offset,
 
 	do {
 		ret = check_committed_ref(root, path, objectid,
-					  offset, bytenr);
+					  offset, bytenr, strict);
 		if (ret && ret != -ENOENT)
 			goto out;
 
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 841c516079a96..3abaff4d2cfff 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1571,7 +1571,7 @@ static int check_can_nocow(struct btrfs_inode *inode, loff_t pos,
 	}
 
 	ret = can_nocow_extent(&inode->vfs_inode, lockstart, &num_bytes,
-			NULL, NULL, NULL);
+			NULL, NULL, NULL, false);
 	if (ret <= 0) {
 		ret = 0;
 		if (!nowait)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 4ad0323b36845..46e04247193ab 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1609,7 +1609,7 @@ static noinline int run_delalloc_nocow(struct btrfs_inode *inode,
 				goto out_check;
 			ret = btrfs_cross_ref_exist(root, ino,
 						    found_key.offset -
-						    extent_offset, disk_bytenr);
+						    extent_offset, disk_bytenr, false);
 			if (ret) {
 				/*
 				 * ret could be -EIO if the above fails to read
@@ -6949,6 +6949,8 @@ static struct extent_map *btrfs_new_extent_direct(struct btrfs_inode *inode,
  * @orig_start:	(optional) Return the original file offset of the file extent
  * @orig_len:	(optional) Return the original on-disk length of the file extent
  * @ram_bytes:	(optional) Return the ram_bytes of the file extent
+ * @strict:	if true, omit optimizations that might force us into unnecessary
+ *		cow. e.g., don't trust generation number.
  *
  * This function will flush ordered extents in the range to ensure proper
  * nocow checks for (nowait == false) case.
@@ -6963,7 +6965,7 @@ static struct extent_map *btrfs_new_extent_direct(struct btrfs_inode *inode,
  */
 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
 			      u64 *orig_start, u64 *orig_block_len,
-			      u64 *ram_bytes)
+			      u64 *ram_bytes, bool strict)
 {
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	struct btrfs_path *path;
@@ -7041,8 +7043,9 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
 	 * Do the same check as in btrfs_cross_ref_exist but without the
 	 * unnecessary search.
 	 */
-	if (btrfs_file_extent_generation(leaf, fi) <=
-	    btrfs_root_last_snapshot(&root->root_item))
+	if (!strict &&
+	    (btrfs_file_extent_generation(leaf, fi) <=
+	     btrfs_root_last_snapshot(&root->root_item)))
 		goto out;
 
 	backref_offset = btrfs_file_extent_offset(leaf, fi);
@@ -7078,7 +7081,8 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
 	 */
 
 	ret = btrfs_cross_ref_exist(root, btrfs_ino(BTRFS_I(inode)),
-				    key.offset - backref_offset, disk_bytenr);
+				    key.offset - backref_offset, disk_bytenr,
+				    strict);
 	if (ret) {
 		ret = 0;
 		goto out;
@@ -7299,7 +7303,7 @@ static int btrfs_get_blocks_direct_write(struct extent_map **map,
 		block_start = em->block_start + (start - em->start);
 
 		if (can_nocow_extent(inode, start, &len, &orig_start,
-				     &orig_block_len, &ram_bytes) == 1 &&
+				     &orig_block_len, &ram_bytes, false) == 1 &&
 		    btrfs_inc_nocow_writers(fs_info, block_start)) {
 			struct extent_map *em2;
 
@@ -10130,7 +10134,7 @@ static int btrfs_swap_activate(struct swap_info_struct *sis, struct file *file,
 		free_extent_map(em);
 		em = NULL;
 
-		ret = can_nocow_extent(inode, start, &len, NULL, NULL, NULL);
+		ret = can_nocow_extent(inode, start, &len, NULL, NULL, NULL, true);
 		if (ret < 0) {
 			goto out;
 		} else if (ret) {
-- 
GitLab


From d49f7d7376d0c0daf8680984a37bd07581ac7d38 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Fri, 31 Jul 2020 18:38:23 +0100
Subject: [PATCH 0400/1341] arm64: Move handling of erratum 1418040 into C code

Instead of dealing with erratum 1418040 on each entry and exit,
let's move the handling to __switch_to() instead, which has
several advantages:

- It can be applied when it matters (switching between 32 and 64
  bit tasks).
- It is written in C (yay!)
- It can rely on static keys rather than alternatives

Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200731173824.107480-2-maz@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/entry.S   | 21 ---------------------
 arch/arm64/kernel/process.c | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 21 deletions(-)

diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 2646178c83294..55af8b504b65a 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -170,19 +170,6 @@ alternative_cb_end
 	stp	x28, x29, [sp, #16 * 14]
 
 	.if	\el == 0
-	.if	\regsize == 32
-	/*
-	 * If we're returning from a 32-bit task on a system affected by
-	 * 1418040 then re-enable userspace access to the virtual counter.
-	 */
-#ifdef CONFIG_ARM64_ERRATUM_1418040
-alternative_if ARM64_WORKAROUND_1418040
-	mrs	x0, cntkctl_el1
-	orr	x0, x0, #2	// ARCH_TIMER_USR_VCT_ACCESS_EN
-	msr	cntkctl_el1, x0
-alternative_else_nop_endif
-#endif
-	.endif
 	clear_gp_regs
 	mrs	x21, sp_el0
 	ldr_this_cpu	tsk, __entry_task, x20
@@ -294,14 +281,6 @@ alternative_else_nop_endif
 	tst	x22, #PSR_MODE32_BIT		// native task?
 	b.eq	3f
 
-#ifdef CONFIG_ARM64_ERRATUM_1418040
-alternative_if ARM64_WORKAROUND_1418040
-	mrs	x0, cntkctl_el1
-	bic	x0, x0, #2			// ARCH_TIMER_USR_VCT_ACCESS_EN
-	msr	cntkctl_el1, x0
-alternative_else_nop_endif
-#endif
-
 #ifdef CONFIG_ARM64_ERRATUM_845719
 alternative_if ARM64_WORKAROUND_845719
 #ifdef CONFIG_PID_IN_CONTEXTIDR
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 84ec630b8ab5d..b63ce4c54cfe9 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -515,6 +515,39 @@ static void entry_task_switch(struct task_struct *next)
 	__this_cpu_write(__entry_task, next);
 }
 
+/*
+ * ARM erratum 1418040 handling, affecting the 32bit view of CNTVCT.
+ * Assuming the virtual counter is enabled at the beginning of times:
+ *
+ * - disable access when switching from a 64bit task to a 32bit task
+ * - enable access when switching from a 32bit task to a 64bit task
+ */
+static void erratum_1418040_thread_switch(struct task_struct *prev,
+					  struct task_struct *next)
+{
+	bool prev32, next32;
+	u64 val;
+
+	if (!(IS_ENABLED(CONFIG_ARM64_ERRATUM_1418040) &&
+	      cpus_have_const_cap(ARM64_WORKAROUND_1418040)))
+		return;
+
+	prev32 = is_compat_thread(task_thread_info(prev));
+	next32 = is_compat_thread(task_thread_info(next));
+
+	if (prev32 == next32)
+		return;
+
+	val = read_sysreg(cntkctl_el1);
+
+	if (!next32)
+		val |= ARCH_TIMER_USR_VCT_ACCESS_EN;
+	else
+		val &= ~ARCH_TIMER_USR_VCT_ACCESS_EN;
+
+	write_sysreg(val, cntkctl_el1);
+}
+
 /*
  * Thread switching.
  */
@@ -530,6 +563,7 @@ __notrace_funcgraph struct task_struct *__switch_to(struct task_struct *prev,
 	entry_task_switch(next);
 	uao_thread_switch(next);
 	ssbs_thread_switch(next);
+	erratum_1418040_thread_switch(prev, next);
 
 	/*
 	 * Complete any pending TLB or cache maintenance on this CPU in case
-- 
GitLab


From bf87bb0881d0f59181fe3bbcf29c609f36483ff8 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Fri, 31 Jul 2020 18:38:24 +0100
Subject: [PATCH 0401/1341] arm64: Allow booting of late CPUs affected by
 erratum 1418040

As we can now switch from a system that isn't affected by 1418040
to a system that globally is affected, let's allow affected CPUs
to come in at a later time.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200731173824.107480-3-maz@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/cpu_errata.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 6bd1d3ad037ad..c332d49780dc9 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -910,6 +910,8 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
 		.desc = "ARM erratum 1418040",
 		.capability = ARM64_WORKAROUND_1418040,
 		ERRATA_MIDR_RANGE_LIST(erratum_1418040_list),
+		.type = (ARM64_CPUCAP_SCOPE_LOCAL_CPU |
+			 ARM64_CPUCAP_PERMITTED_FOR_LATE_CPU),
 	},
 #endif
 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT
-- 
GitLab


From abf532cceaca9c21a148498091f87de1b8ae9b49 Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Mon, 3 Aug 2020 13:31:25 -0600
Subject: [PATCH 0402/1341] KVM: arm64: Print warning when cpu erratum can
 cause guests to deadlock

If guests don't have certain CPU erratum workarounds implemented, then
there is a possibility a guest can deadlock the system. IOW, only trusted
guests should be used on systems with the erratum.

This is the case for Cortex-A57 erratum 832075.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: Julien Thierry <julien.thierry.kdev@gmail.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: kvmarm@lists.cs.columbia.edu
Link: https://lore.kernel.org/r/20200803193127.3012242-2-robh@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kvm/arm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 691d21e4c717e..46dc3d75cf135 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -1640,6 +1640,10 @@ int kvm_arch_init(void *opaque)
 		return -ENODEV;
 	}
 
+	if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE))
+		kvm_info("Guests without required CPU erratum workarounds can deadlock system!\n" \
+			 "Only trusted guests should be used on this system.\n");
+
 	for_each_online_cpu(cpu) {
 		smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1);
 		if (ret < 0) {
-- 
GitLab


From 38480df564cc68f081bb38998927d164b9010995 Mon Sep 17 00:00:00 2001
From: Andrew Jones <drjones@redhat.com>
Date: Tue, 4 Aug 2020 19:05:59 +0200
Subject: [PATCH 0403/1341] KVM: arm64: pvtime: steal-time is only supported
 when configured

Don't confuse the guest by saying steal-time is supported when
it hasn't been configured by userspace and won't work.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200804170604.42662-2-drjones@redhat.com
---
 arch/arm64/kvm/pvtime.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index f7b52ce1557ec..c3ef4ebd68465 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -43,7 +43,8 @@ long kvm_hypercall_pv_features(struct kvm_vcpu *vcpu)
 	switch (feature) {
 	case ARM_SMCCC_HV_PV_TIME_FEATURES:
 	case ARM_SMCCC_HV_PV_TIME_ST:
-		val = SMCCC_RET_SUCCESS;
+		if (vcpu->arch.steal.base != GPA_INVALID)
+			val = SMCCC_RET_SUCCESS;
 		break;
 	}
 
-- 
GitLab


From 2dbd780e34ac53e79c6c359ce12b89ed665ef562 Mon Sep 17 00:00:00 2001
From: Andrew Jones <drjones@redhat.com>
Date: Tue, 4 Aug 2020 19:06:00 +0200
Subject: [PATCH 0404/1341] KVM: arm64: pvtime: Fix potential loss of stolen
 time

We should only check current->sched_info.run_delay once when
updating stolen time. Otherwise there's a chance there could
be a change between checks that we miss (preemption disabling
comes after vcpu request checks).

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200804170604.42662-3-drjones@redhat.com
---
 arch/arm64/kvm/pvtime.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index c3ef4ebd68465..95f9580275b1b 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -13,6 +13,7 @@
 void kvm_update_stolen_time(struct kvm_vcpu *vcpu)
 {
 	struct kvm *kvm = vcpu->kvm;
+	u64 last_steal = vcpu->arch.steal.last_steal;
 	u64 steal;
 	__le64 steal_le;
 	u64 offset;
@@ -24,8 +25,8 @@ void kvm_update_stolen_time(struct kvm_vcpu *vcpu)
 
 	/* Let's do the local bookkeeping */
 	steal = vcpu->arch.steal.steal;
-	steal += current->sched_info.run_delay - vcpu->arch.steal.last_steal;
-	vcpu->arch.steal.last_steal = current->sched_info.run_delay;
+	vcpu->arch.steal.last_steal = READ_ONCE(current->sched_info.run_delay);
+	steal += vcpu->arch.steal.last_steal - last_steal;
 	vcpu->arch.steal.steal = steal;
 
 	steal_le = cpu_to_le64(steal);
-- 
GitLab


From 4d2d4ce001f283ed8127173543b4cfb65641e357 Mon Sep 17 00:00:00 2001
From: Andrew Jones <drjones@redhat.com>
Date: Tue, 4 Aug 2020 19:06:01 +0200
Subject: [PATCH 0405/1341] KVM: arm64: Drop type input from kvm_put_guest

We can use typeof() to avoid the need for the type input.

Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200804170604.42662-4-drjones@redhat.com
---
 arch/arm64/kvm/pvtime.c  |  2 +-
 include/linux/kvm_host.h | 11 ++++++-----
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index 95f9580275b1b..241ded7ee0ad7 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -32,7 +32,7 @@ void kvm_update_stolen_time(struct kvm_vcpu *vcpu)
 	steal_le = cpu_to_le64(steal);
 	idx = srcu_read_lock(&kvm->srcu);
 	offset = offsetof(struct pvclock_vcpu_stolen_time, stolen_time);
-	kvm_put_guest(kvm, base + offset, steal_le, u64);
+	kvm_put_guest(kvm, base + offset, steal_le);
 	srcu_read_unlock(&kvm->srcu, idx);
 }
 
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index a23076765b4cc..84371fb06209d 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -749,25 +749,26 @@ int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 			      gpa_t gpa, unsigned long len);
 
-#define __kvm_put_guest(kvm, gfn, offset, value, type)			\
+#define __kvm_put_guest(kvm, gfn, offset, v)				\
 ({									\
 	unsigned long __addr = gfn_to_hva(kvm, gfn);			\
-	type __user *__uaddr = (type __user *)(__addr + offset);	\
+	typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset);	\
 	int __ret = -EFAULT;						\
 									\
 	if (!kvm_is_error_hva(__addr))					\
-		__ret = put_user(value, __uaddr);			\
+		__ret = put_user(v, __uaddr);				\
 	if (!__ret)							\
 		mark_page_dirty(kvm, gfn);				\
 	__ret;								\
 })
 
-#define kvm_put_guest(kvm, gpa, value, type)				\
+#define kvm_put_guest(kvm, gpa, v)					\
 ({									\
 	gpa_t __gpa = gpa;						\
 	struct kvm *__kvm = kvm;					\
+									\
 	__kvm_put_guest(__kvm, __gpa >> PAGE_SHIFT,			\
-			offset_in_page(__gpa), (value), type);		\
+			offset_in_page(__gpa), v);			\
 })
 
 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
-- 
GitLab


From 53f985584e3c2ebe5f2455530fbf87a001528db8 Mon Sep 17 00:00:00 2001
From: Andrew Jones <drjones@redhat.com>
Date: Tue, 4 Aug 2020 19:06:02 +0200
Subject: [PATCH 0406/1341] KVM: arm64: pvtime: Fix stolen time accounting
 across migration

When updating the stolen time we should always read the current
stolen time from the user provided memory, not from a kernel
cache. If we use a cache then we'll end up resetting stolen time
to zero on the first update after migration.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200804170604.42662-5-drjones@redhat.com
---
 arch/arm64/include/asm/kvm_host.h |  1 -
 arch/arm64/kvm/pvtime.c           | 23 +++++++++--------------
 include/linux/kvm_host.h          | 20 ++++++++++++++++++++
 3 files changed, 29 insertions(+), 15 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 65568b23868a1..dd9c3b25aa1e3 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -368,7 +368,6 @@ struct kvm_vcpu_arch {
 
 	/* Guest PV state */
 	struct {
-		u64 steal;
 		u64 last_steal;
 		gpa_t base;
 	} steal;
diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index 241ded7ee0ad7..75234321d896d 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -13,26 +13,22 @@
 void kvm_update_stolen_time(struct kvm_vcpu *vcpu)
 {
 	struct kvm *kvm = vcpu->kvm;
+	u64 base = vcpu->arch.steal.base;
 	u64 last_steal = vcpu->arch.steal.last_steal;
-	u64 steal;
-	__le64 steal_le;
-	u64 offset;
+	u64 offset = offsetof(struct pvclock_vcpu_stolen_time, stolen_time);
+	u64 steal = 0;
 	int idx;
-	u64 base = vcpu->arch.steal.base;
 
 	if (base == GPA_INVALID)
 		return;
 
-	/* Let's do the local bookkeeping */
-	steal = vcpu->arch.steal.steal;
-	vcpu->arch.steal.last_steal = READ_ONCE(current->sched_info.run_delay);
-	steal += vcpu->arch.steal.last_steal - last_steal;
-	vcpu->arch.steal.steal = steal;
-
-	steal_le = cpu_to_le64(steal);
 	idx = srcu_read_lock(&kvm->srcu);
-	offset = offsetof(struct pvclock_vcpu_stolen_time, stolen_time);
-	kvm_put_guest(kvm, base + offset, steal_le);
+	if (!kvm_get_guest(kvm, base + offset, steal)) {
+		steal = le64_to_cpu(steal);
+		vcpu->arch.steal.last_steal = READ_ONCE(current->sched_info.run_delay);
+		steal += vcpu->arch.steal.last_steal - last_steal;
+		kvm_put_guest(kvm, base + offset, cpu_to_le64(steal));
+	}
 	srcu_read_unlock(&kvm->srcu, idx);
 }
 
@@ -66,7 +62,6 @@ gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu)
 	 * Start counting stolen time from the time the guest requests
 	 * the feature enabled.
 	 */
-	vcpu->arch.steal.steal = 0;
 	vcpu->arch.steal.last_steal = current->sched_info.run_delay;
 
 	idx = srcu_read_lock(&kvm->srcu);
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 84371fb06209d..05e3c2fb3ef78 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -749,6 +749,26 @@ int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 			      gpa_t gpa, unsigned long len);
 
+#define __kvm_get_guest(kvm, gfn, offset, v)				\
+({									\
+	unsigned long __addr = gfn_to_hva(kvm, gfn);			\
+	typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset);	\
+	int __ret = -EFAULT;						\
+									\
+	if (!kvm_is_error_hva(__addr))					\
+		__ret = get_user(v, __uaddr);				\
+	__ret;								\
+})
+
+#define kvm_get_guest(kvm, gpa, v)					\
+({									\
+	gpa_t __gpa = gpa;						\
+	struct kvm *__kvm = kvm;					\
+									\
+	__kvm_get_guest(__kvm, __gpa >> PAGE_SHIFT,			\
+			offset_in_page(__gpa), v);			\
+})
+
 #define __kvm_put_guest(kvm, gfn, offset, v)				\
 ({									\
 	unsigned long __addr = gfn_to_hva(kvm, gfn);			\
-- 
GitLab


From 739c7af7daeede8e2ec78392f2617c965ce0342a Mon Sep 17 00:00:00 2001
From: Andrew Jones <drjones@redhat.com>
Date: Tue, 4 Aug 2020 19:06:03 +0200
Subject: [PATCH 0407/1341] KVM: Documentation: Minor fixups

In preparation for documenting a new capability let's fix up the
formatting of the current ones.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20200804170604.42662-6-drjones@redhat.com
---
 Documentation/virt/kvm/api.rst | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index eb3a1316f03ec..49af23d2b4628 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -6130,7 +6130,7 @@ HvCallSendSyntheticClusterIpi, HvCallSendSyntheticClusterIpiEx.
 8.21 KVM_CAP_HYPERV_DIRECT_TLBFLUSH
 -----------------------------------
 
-:Architecture: x86
+:Architectures: x86
 
 This capability indicates that KVM running on top of Hyper-V hypervisor
 enables Direct TLB flush for its guests meaning that TLB flush
@@ -6143,16 +6143,17 @@ in CPUID and only exposes Hyper-V identification. In this case, guest
 thinks it's running on Hyper-V and only use Hyper-V hypercalls.
 
 8.22 KVM_CAP_S390_VCPU_RESETS
+-----------------------------
 
-Architectures: s390
+:Architectures: s390
 
 This capability indicates that the KVM_S390_NORMAL_RESET and
 KVM_S390_CLEAR_RESET ioctls are available.
 
 8.23 KVM_CAP_S390_PROTECTED
+---------------------------
 
-Architecture: s390
-
+:Architectures: s390
 
 This capability indicates that the Ultravisor has been initialized and
 KVM can therefore start protected VMs.
-- 
GitLab


From 004a01241c5a0d375266ebf1c72f208de99294e9 Mon Sep 17 00:00:00 2001
From: Andrew Jones <drjones@redhat.com>
Date: Tue, 4 Aug 2020 19:06:04 +0200
Subject: [PATCH 0408/1341] arm64/x86: KVM: Introduce steal-time cap

arm64 requires a vcpu fd (KVM_HAS_DEVICE_ATTR vcpu ioctl) to probe
support for steal-time. However this is unnecessary, as only a KVM
fd is required, and it complicates userspace (userspace may prefer
delaying vcpu creation until after feature probing). Introduce a cap
that can be checked instead. While x86 can already probe steal-time
support with a kvm fd (KVM_GET_SUPPORTED_CPUID), we add the cap there
too for consistency.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20200804170604.42662-7-drjones@redhat.com
---
 Documentation/virt/kvm/api.rst    | 13 +++++++++++++
 arch/arm64/include/asm/kvm_host.h |  1 +
 arch/arm64/kvm/arm.c              |  3 +++
 arch/arm64/kvm/pvtime.c           |  2 +-
 arch/x86/kvm/x86.c                |  3 +++
 include/uapi/linux/kvm.h          |  1 +
 6 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index 49af23d2b4628..d2b733dc7892c 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -6160,3 +6160,16 @@ KVM can therefore start protected VMs.
 This capability governs the KVM_S390_PV_COMMAND ioctl and the
 KVM_MP_STATE_LOAD MP_STATE. KVM_SET_MP_STATE can fail for protected
 guests when the state change is invalid.
+
+8.24 KVM_CAP_STEAL_TIME
+-----------------------
+
+:Architectures: arm64, x86
+
+This capability indicates that KVM supports steal time accounting.
+When steal time accounting is supported it may be enabled with
+architecture-specific interfaces.  This capability and the architecture-
+specific interfaces must be consistent, i.e. if one says the feature
+is supported, than the other should as well and vice versa.  For arm64
+see Documentation/virt/kvm/devices/vcpu.rst "KVM_ARM_VCPU_PVTIME_CTRL".
+For x86 see Documentation/virt/kvm/msr.rst "MSR_KVM_STEAL_TIME".
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index dd9c3b25aa1e3..af4989a25bb77 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -543,6 +543,7 @@ long kvm_hypercall_pv_features(struct kvm_vcpu *vcpu);
 gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu);
 void kvm_update_stolen_time(struct kvm_vcpu *vcpu);
 
+bool kvm_arm_pvtime_supported(void);
 int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu,
 			    struct kvm_device_attr *attr);
 int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu,
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 691d21e4c717e..57876b0b870b1 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -206,6 +206,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 		 */
 		r = 1;
 		break;
+	case KVM_CAP_STEAL_TIME:
+		r = kvm_arm_pvtime_supported();
+		break;
 	default:
 		r = kvm_arch_vm_ioctl_check_extension(kvm, ext);
 		break;
diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index 75234321d896d..920ac43077ad3 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -71,7 +71,7 @@ gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu)
 	return base;
 }
 
-static bool kvm_arm_pvtime_supported(void)
+bool kvm_arm_pvtime_supported(void)
 {
 	return !!sched_info_on();
 }
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 599d73206299c..c44d3a73b8ebe 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3581,6 +3581,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
 	case KVM_CAP_SMALLER_MAXPHYADDR:
 		r = (int) allow_smaller_maxphyaddr;
 		break;
+	case KVM_CAP_STEAL_TIME:
+		r = sched_info_on();
+		break;
 	default:
 		break;
 	}
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index f6d86033c4fa3..3d8023474f2a6 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1035,6 +1035,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_LAST_CPU 184
 #define KVM_CAP_SMALLER_MAXPHYADDR 185
 #define KVM_CAP_S390_DIAG318 186
+#define KVM_CAP_STEAL_TIME 187
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
-- 
GitLab


From 4b04e0decd2518e54e3f371abf3d883b3198663d Mon Sep 17 00:00:00 2001
From: Sumanth Korikkar <sumanthk@linux.ibm.com>
Date: Mon, 17 Aug 2020 09:27:54 +0200
Subject: [PATCH 0409/1341] perf test: Fix basic bpf filtering test

BPF basic filtering test fails on s390x (when vmlinux debuginfo is
utilized instead of /proc/kallsyms)

Info:
- bpf_probe_load installs the bpf code at do_epoll_wait.
- For s390x, do_epoll_wait resolves to 3 functions including inlines.
  found inline addr: 0x43769e
  Probe point found: __s390_sys_epoll_wait+6
  found inline addr: 0x437290
  Probe point found: do_epoll_wait+0
  found inline addr: 0x4375d6
  Probe point found: __se_sys_epoll_wait+6
- add_bpf_event  creates evsel for every probe in a BPF object. This
  results in 3 evsels.

Solution:
- Expected result = 50% of the samples to be collected from epoll_wait *
  number of entries present in the evlist.

Committer testing:

  # perf test 42
  42: BPF filter                                            :
  42.1: Basic BPF filtering                                 : Ok
  42.2: BPF pinning                                         : Ok
  42.3: BPF prologue generation                             : Ok
  42.4: BPF relocation checker                              : Ok
  #

Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Reviewed-by: Thomas Richter <tmricht@linux.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: bpf@vger.kernel.org
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
LPU-Reference: 20200817072754.58344-1-sumanthk@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/bpf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/tests/bpf.c b/tools/perf/tests/bpf.c
index 5d20bf8397f09..cd77e334e5777 100644
--- a/tools/perf/tests/bpf.c
+++ b/tools/perf/tests/bpf.c
@@ -197,7 +197,7 @@ static int do_test(struct bpf_object *obj, int (*func)(void),
 		perf_mmap__read_done(&md->core);
 	}
 
-	if (count != expect) {
+	if (count != expect * evlist->core.nr_entries) {
 		pr_debug("BPF filter result incorrect, expected %d, got %d samples\n", expect, count);
 		goto out_delete_evlist;
 	}
-- 
GitLab


From a74eaf1605d42391c2357a70e94e5a2c7780fea9 Mon Sep 17 00:00:00 2001
From: David Ahern <dsahern@kernel.org>
Date: Mon, 17 Aug 2020 11:09:42 -0600
Subject: [PATCH 0410/1341] perf sched timehist: Fix use of CPU list with
 summary option

Do not update thread stats or show idle summary unless CPU is in the
list of interest.

Fixes: c30d630d1bcfad8d ("perf sched timehist: Add support for filtering on CPU")
Signed-off-by: David Ahern <dsahern@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lore.kernel.org/lkml/20200817170943.1486-1-dsahern@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-sched.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 0c7d599fa555a..e6fc297cee91d 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -2584,7 +2584,8 @@ static int timehist_sched_change_event(struct perf_tool *tool,
 	}
 
 	if (!sched->idle_hist || thread->tid == 0) {
-		timehist_update_runtime_stats(tr, t, tprev);
+		if (!cpu_list || test_bit(sample->cpu, cpu_bitmap))
+			timehist_update_runtime_stats(tr, t, tprev);
 
 		if (sched->idle_hist) {
 			struct idle_thread_runtime *itr = (void *)tr;
@@ -2857,6 +2858,9 @@ static void timehist_print_summary(struct perf_sched *sched,
 
 	printf("\nIdle stats:\n");
 	for (i = 0; i < idle_max_cpu; ++i) {
+		if (cpu_list && !test_bit(i, cpu_bitmap))
+			continue;
+
 		t = idle_threads[i];
 		if (!t)
 			continue;
-- 
GitLab


From 0c5f1acc2a14416bf30023f373558d369afdbfc8 Mon Sep 17 00:00:00 2001
From: Tiezhu Yang <yangtiezhu@loongson.cn>
Date: Tue, 18 Aug 2020 20:30:37 +0800
Subject: [PATCH 0411/1341] perf top: Skip side-band event setup if
 HAVE_LIBBPF_SUPPORT is not set

When I execute 'perf top' without HAVE_LIBBPF_SUPPORT, there exists the
following segmentation fault, skip the side-band event setup to fix it,
this is similar with commit 1101c872c8c7 ("perf record: Skip side-band
event setup if HAVE_LIBBPF_SUPPORT is not set").

  [yangtiezhu@linux perf]$ ./perf top
  <SNIP>
  perf: Segmentation fault
  Obtained 6 stack frames.
  ./perf(sighandler_dump_stack+0x5c) [0x12011b604]
  [0xffffffc010]
  ./perf(perf_mmap__read_init+0x3e) [0x1201feeae]
  ./perf() [0x1200d715c]
  /lib64/libpthread.so.0(+0xab9c) [0xffee10ab9c]
  /lib64/libc.so.6(+0x128f4c) [0xffedc08f4c]
  Segmentation fault
  [yangtiezhu@linux perf]$

I use git bisect to find commit b38d85ef49cf ("perf bpf: Decouple
creating the evlist from adding the SB event") is the first bad commit,
so also add the Fixes tag.

Committer testing:

First build perf explicitely disabling libbpf:

  $ make NO_LIBBPF=1 O=/tmp/build/perf -C tools/perf install-bin && perf test python

Now make sure it isn't linked:

  $ perf -vv | grep -w bpf
                   bpf: [ OFF ]  # HAVE_LIBBPF_SUPPORT
  $
  $ nm ~/bin/perf | grep libbpf
  $

And now try to run 'perf top':

  # perf top
  perf: Segmentation fault
  -------- backtrace --------
  perf[0x5bcd6d]
  /lib64/libc.so.6(+0x3ca6f)[0x7fd0f5a66a6f]
  perf(perf_mmap__read_init+0x1e)[0x5e1afe]
  perf[0x4cc468]
  /lib64/libpthread.so.0(+0x9431)[0x7fd0f645a431]
  /lib64/libc.so.6(clone+0x42)[0x7fd0f5b2b912]
  #

Applying this patch fixes the issue.

Fixes: b38d85ef49cf ("perf bpf: Decouple creating the evlist from adding the SB event")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Xuefeng Li <lixuefeng@loongson.cn>
Link: http://lore.kernel.org/lkml/1597753837-16222-1-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-top.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 994c230027bb2..7c64134472c77 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1746,6 +1746,7 @@ int cmd_top(int argc, const char **argv)
 		goto out_delete_evlist;
 	}
 
+#ifdef HAVE_LIBBPF_SUPPORT
 	if (!top.record_opts.no_bpf_event) {
 		top.sb_evlist = evlist__new();
 
@@ -1759,6 +1760,7 @@ int cmd_top(int argc, const char **argv)
 			goto out_delete_evlist;
 		}
 	}
+#endif
 
 	if (perf_evlist__start_sb_thread(top.sb_evlist, target)) {
 		pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n");
-- 
GitLab


From 783abbd444926f0d94039c4cf5e5ca1d07496bce Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Tue, 18 Aug 2020 10:00:13 -0300
Subject: [PATCH 0412/1341] perf symbols: Add mwait_idle_with_hints.constprop.0
 to the list of idle symbols

The "mwait_idle_with_hints" one was already there, some compiler
artifact now adds this ".constprop.0" suffix, cover that one too.

At some point we need to put these in a special bucket and show it
somewhere on the screen.

Noticed building the kernel on a fedora:32 system using:

  gcc version 10.2.1 20200723 (Red Hat 10.2.1-1) (GCC)

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/symbol.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 1f5fcb828a212..5151a8c0b791a 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -663,6 +663,7 @@ static bool symbol__is_idle(const char *name)
 		"exit_idle",
 		"mwait_idle",
 		"mwait_idle_with_hints",
+		"mwait_idle_with_hints.constprop.0",
 		"poll_idle",
 		"ppc64_runlatch_off",
 		"pseries_dedicated_idle_sleep",
-- 
GitLab


From 19684e969debc912b3ec5eda72b4f90aa73f1d30 Mon Sep 17 00:00:00 2001
From: Wei Li <liwei391@huawei.com>
Date: Fri, 24 Jul 2020 15:26:28 +0800
Subject: [PATCH 0413/1341] perf: arm-spe: Fix check error when synthesizing
 events

In arm_spe_read_record(), when we are processing an events packet,
'decoder->packet.index' is the length of payload, which has been
transformed in payloadlen(). So correct the check of 'idx'.

Signed-off-by: Wei Li <liwei391@huawei.com>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200724072628.35904-1-liwei391@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/arm-spe-decoder/arm-spe-decoder.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
index 302a14d0aca9e..93e063f22be50 100644
--- a/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
+++ b/tools/perf/util/arm-spe-decoder/arm-spe-decoder.c
@@ -182,15 +182,15 @@ static int arm_spe_read_record(struct arm_spe_decoder *decoder)
 			if (payload & BIT(EV_TLB_ACCESS))
 				decoder->record.type |= ARM_SPE_TLB_ACCESS;
 
-			if ((idx == 1 || idx == 2 || idx == 3) &&
+			if ((idx == 2 || idx == 4 || idx == 8) &&
 			    (payload & BIT(EV_LLC_MISS)))
 				decoder->record.type |= ARM_SPE_LLC_MISS;
 
-			if ((idx == 1 || idx == 2 || idx == 3) &&
+			if ((idx == 2 || idx == 4 || idx == 8) &&
 			    (payload & BIT(EV_LLC_ACCESS)))
 				decoder->record.type |= ARM_SPE_LLC_ACCESS;
 
-			if ((idx == 1 || idx == 2 || idx == 3) &&
+			if ((idx == 2 || idx == 4 || idx == 8) &&
 			    (payload & BIT(EV_REMOTE_ACCESS)))
 				decoder->record.type |= ARM_SPE_REMOTE_ACCESS;
 
-- 
GitLab


From 57ed62892b9cb0d07b3d3913fa5997a234ff016e Mon Sep 17 00:00:00 2001
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Thu, 20 Aug 2020 11:55:10 -0600
Subject: [PATCH 0414/1341] MAINTAINERS: Add entries for CoreSight and Arm SPE
 tooling

Add entries for perf tools elements related to the support of ARM
CoreSight and ARM SPE.  Also lump in arm and arm64 architecture files to
provide coverage.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: John Garry <john.garry@huawei.com>
Acked-by: Will Deacon <will@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lore.kernel.org/lkml/20200820175510.3935932-1-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 MAINTAINERS | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index deaafb617361c..1c700a936edd1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -13569,12 +13569,18 @@ F:	kernel/events/*
 F:	tools/lib/perf/
 F:	tools/perf/
 
-PERFORMANCE EVENTS SUBSYSTEM ARM64 PMU EVENTS
+PERFORMANCE EVENTS TOOLING ARM64
 R:	John Garry <john.garry@huawei.com>
 R:	Will Deacon <will@kernel.org>
+R:	Mathieu Poirier <mathieu.poirier@linaro.org>
+R:	Leo Yan <leo.yan@linaro.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Supported
+F:	tools/build/feature/test-libopencsd.c
+F:	tools/perf/arch/arm*/
 F:	tools/perf/pmu-events/arch/arm64/
+F:	tools/perf/util/arm-spe*
+F:	tools/perf/util/cs-etm*
 
 PERSONALITY HANDLING
 M:	Christoph Hellwig <hch@infradead.org>
-- 
GitLab


From 541cebb51f3422d4f2c6cb95c1e5cc3dcc9e5021 Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@csgroup.eu>
Date: Fri, 21 Aug 2020 07:15:25 +0000
Subject: [PATCH 0415/1341] powerpc/32s: Fix module loading failure when
 VMALLOC_END is over 0xf0000000

In is_module_segment(), when VMALLOC_END is over 0xf0000000,
ALIGN(VMALLOC_END, SZ_256M) has value 0.

In that case, addr >= ALIGN(VMALLOC_END, SZ_256M) is always
true then is_module_segment() always returns false.

Use (ALIGN(VMALLOC_END, SZ_256M) - 1) which will have
value 0xffffffff and will be suitable for the comparison.

Fixes: c49643319715 ("powerpc/32s: Only leave NX unset on segments used for modules")
Reported-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Tested-by: Andreas Schwab <schwab@linux-m68k.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/09fc73fe9c7423c6b4cf93f93df9bb0ed8eefab5.1597994047.git.christophe.leroy@csgroup.eu
---
 arch/powerpc/mm/book3s32/mmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/mm/book3s32/mmu.c b/arch/powerpc/mm/book3s32/mmu.c
index 82ae9e06a7732..d426eaf76bb04 100644
--- a/arch/powerpc/mm/book3s32/mmu.c
+++ b/arch/powerpc/mm/book3s32/mmu.c
@@ -194,12 +194,12 @@ static bool is_module_segment(unsigned long addr)
 #ifdef MODULES_VADDR
 	if (addr < ALIGN_DOWN(MODULES_VADDR, SZ_256M))
 		return false;
-	if (addr >= ALIGN(MODULES_END, SZ_256M))
+	if (addr > ALIGN(MODULES_END, SZ_256M) - 1)
 		return false;
 #else
 	if (addr < ALIGN_DOWN(VMALLOC_START, SZ_256M))
 		return false;
-	if (addr >= ALIGN(VMALLOC_END, SZ_256M))
+	if (addr > ALIGN(VMALLOC_END, SZ_256M) - 1)
 		return false;
 #endif
 	return true;
-- 
GitLab


From 64ef8f2c4791940d7f3945507b6a45c20d959260 Mon Sep 17 00:00:00 2001
From: Kajol Jain <kjain@linux.ibm.com>
Date: Fri, 21 Aug 2020 13:36:10 +0530
Subject: [PATCH 0416/1341] powerpc/perf/hv-24x7: Move cpumask file to top
 folder of hv-24x7 driver

Commit 792f73f747b8 ("powerpc/hv-24x7: Add sysfs files inside hv-24x7
device to show cpumask") added cpumask file as part of hv-24x7 driver
inside the interface folder. The cpumask file is supposed to be in the
top folder of the PMU driver in order to make hotplug work.

This patch fixes that issue and creates new group 'cpumask_attr_group'
to add cpumask file and make sure it added in top folder.

  command:# cat /sys/devices/hv_24x7/cpumask
  0

Fixes: 792f73f747b8 ("powerpc/hv-24x7: Add sysfs files inside hv-24x7 device to show cpumask")
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200821080610.123997-1-kjain@linux.ibm.com
---
 .../testing/sysfs-bus-event_source-devices-hv_24x7    |  2 +-
 arch/powerpc/perf/hv-24x7.c                           | 11 ++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7 b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7
index f7e32f218f737..e82fc37be8022 100644
--- a/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7
+++ b/Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7
@@ -43,7 +43,7 @@ Description:	read only
 		This sysfs interface exposes the number of cores per chip
 		present in the system.
 
-What:		/sys/devices/hv_24x7/interface/cpumask
+What:		/sys/devices/hv_24x7/cpumask
 Date:		July 2020
 Contact:	Linux on PowerPC Developer List <linuxppc-dev@lists.ozlabs.org>
 Description:	read only
diff --git a/arch/powerpc/perf/hv-24x7.c b/arch/powerpc/perf/hv-24x7.c
index cdb7bfbd157e0..6e7e820508df7 100644
--- a/arch/powerpc/perf/hv-24x7.c
+++ b/arch/powerpc/perf/hv-24x7.c
@@ -1128,6 +1128,15 @@ static struct bin_attribute *if_bin_attrs[] = {
 	NULL,
 };
 
+static struct attribute *cpumask_attrs[] = {
+	&dev_attr_cpumask.attr,
+	NULL,
+};
+
+static struct attribute_group cpumask_attr_group = {
+	.attrs = cpumask_attrs,
+};
+
 static struct attribute *if_attrs[] = {
 	&dev_attr_catalog_len.attr,
 	&dev_attr_catalog_version.attr,
@@ -1135,7 +1144,6 @@ static struct attribute *if_attrs[] = {
 	&dev_attr_sockets.attr,
 	&dev_attr_chipspersocket.attr,
 	&dev_attr_coresperchip.attr,
-	&dev_attr_cpumask.attr,
 	NULL,
 };
 
@@ -1151,6 +1159,7 @@ static const struct attribute_group *attr_groups[] = {
 	&event_desc_group,
 	&event_long_desc_group,
 	&if_group,
+	&cpumask_attr_group,
 	NULL,
 };
 
-- 
GitLab


From f6da70d99c96256f8be0cbb4dd72d45d622c7823 Mon Sep 17 00:00:00 2001
From: Leon Romanovsky <leonro@nvidia.com>
Date: Mon, 10 Aug 2020 12:10:59 +0300
Subject: [PATCH 0417/1341] MAINTAINERS: Update Mellanox and Cumulus Network
 addresses to new domain

Mellanox and Cumulus Network were acquired by Nvidia, so change the
maintainers emails to new domain name.

Link: https://lore.kernel.org/r/20200810091100.243932-1-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 .mailmap    |  2 ++
 MAINTAINERS | 58 ++++++++++++++++++++++++++---------------------------
 2 files changed, 31 insertions(+), 29 deletions(-)

diff --git a/.mailmap b/.mailmap
index 57fe0085b4659..3ce5583d3d4ba 100644
--- a/.mailmap
+++ b/.mailmap
@@ -128,6 +128,7 @@ Jan Glauber <jan.glauber@gmail.com> <jang@de.ibm.com>
 Jan Glauber <jan.glauber@gmail.com> <jang@linux.vnet.ibm.com>
 Jan Glauber <jan.glauber@gmail.com> <jglauber@cavium.com>
 Jason Gunthorpe <jgg@ziepe.ca> <jgg@mellanox.com>
+Jason Gunthorpe <jgg@ziepe.ca> <jgg@nvidia.com>
 Jason Gunthorpe <jgg@ziepe.ca> <jgunthorpe@obsidianresearch.com>
 Javi Merino <javi.merino@kernel.org> <javi.merino@arm.com>
 <javier@osg.samsung.com> <javier.martinez@collabora.co.uk>
@@ -172,6 +173,7 @@ Krzysztof Kozlowski <krzk@kernel.org> <k.kozlowski.k@gmail.com>
 Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
 Leon Romanovsky <leon@kernel.org> <leon@leon.nu>
 Leon Romanovsky <leon@kernel.org> <leonro@mellanox.com>
+Leon Romanovsky <leon@kernel.org> <leonro@nvidia.com>
 Leonardo Bras <leobras.c@gmail.com> <leonardo@linux.ibm.com>
 Leonid I Ananiev <leonid.i.ananiev@intel.com>
 Linas Vepstas <linas@austin.ibm.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index deaafb617361c..f0068bceeb615 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5050,7 +5050,7 @@ F:	include/linux/dm-*.h
 F:	include/uapi/linux/dm-*.h
 
 DEVLINK
-M:	Jiri Pirko <jiri@mellanox.com>
+M:	Jiri Pirko <jiri@nvidia.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	Documentation/networking/devlink
@@ -6081,7 +6081,7 @@ F:	include/linux/dynamic_debug.h
 F:	lib/dynamic_debug.c
 
 DYNAMIC INTERRUPT MODERATION
-M:	Tal Gilboa <talgi@mellanox.com>
+M:	Tal Gilboa <talgi@nvidia.com>
 S:	Maintained
 F:	Documentation/networking/net_dim.rst
 F:	include/linux/dim.h
@@ -6161,7 +6161,7 @@ F:	Documentation/devicetree/bindings/edac/aspeed-sdram-edac.txt
 F:	drivers/edac/aspeed_edac.c
 
 EDAC-BLUEFIELD
-M:	Shravan Kumar Ramani <sramani@mellanox.com>
+M:	Shravan Kumar Ramani <sramani@nvidia.com>
 S:	Supported
 F:	drivers/edac/bluefield_edac.c
 
@@ -6483,8 +6483,8 @@ S:	Odd Fixes
 F:	drivers/net/ethernet/agere/
 
 ETHERNET BRIDGE
-M:	Roopa Prabhu <roopa@cumulusnetworks.com>
-M:	Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
+M:	Roopa Prabhu <roopa@nvidia.com>
+M:	Nikolay Aleksandrov <nikolay@nvidia.com>
 L:	bridge@lists.linux-foundation.org (moderated for non-subscribers)
 L:	netdev@vger.kernel.org
 S:	Maintained
@@ -6599,7 +6599,7 @@ F:	drivers/iommu/exynos-iommu.c
 
 EZchip NPS platform support
 M:	Vineet Gupta <vgupta@synopsys.com>
-M:	Ofer Levi <oferle@mellanox.com>
+M:	Ofer Levi <oferle@nvidia.com>
 S:	Supported
 F:	arch/arc/boot/dts/eznps.dts
 F:	arch/arc/plat-eznps
@@ -8563,7 +8563,7 @@ F:	drivers/iio/pressure/dps310.c
 
 INFINIBAND SUBSYSTEM
 M:	Doug Ledford <dledford@redhat.com>
-M:	Jason Gunthorpe <jgg@mellanox.com>
+M:	Jason Gunthorpe <jgg@nvidia.com>
 L:	linux-rdma@vger.kernel.org
 S:	Supported
 W:	https://github.com/linux-rdma/rdma-core
@@ -9226,7 +9226,7 @@ F:	drivers/firmware/iscsi_ibft*
 
 ISCSI EXTENSIONS FOR RDMA (ISER) INITIATOR
 M:	Sagi Grimberg <sagi@grimberg.me>
-M:	Max Gurtovoy <maxg@mellanox.com>
+M:	Max Gurtovoy <maxg@nvidia.com>
 L:	linux-rdma@vger.kernel.org
 S:	Supported
 W:	http://www.openfabrics.org
@@ -11072,7 +11072,7 @@ F:	Documentation/devicetree/bindings/input/touchscreen/melfas_mip4.txt
 F:	drivers/input/touchscreen/melfas_mip4.c
 
 MELLANOX ETHERNET DRIVER (mlx4_en)
-M:	Tariq Toukan <tariqt@mellanox.com>
+M:	Tariq Toukan <tariqt@nvidia.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 W:	http://www.mellanox.com
@@ -11080,7 +11080,7 @@ Q:	http://patchwork.ozlabs.org/project/netdev/list/
 F:	drivers/net/ethernet/mellanox/mlx4/en_*
 
 MELLANOX ETHERNET DRIVER (mlx5e)
-M:	Saeed Mahameed <saeedm@mellanox.com>
+M:	Saeed Mahameed <saeedm@nvidia.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 W:	http://www.mellanox.com
@@ -11088,7 +11088,7 @@ Q:	http://patchwork.ozlabs.org/project/netdev/list/
 F:	drivers/net/ethernet/mellanox/mlx5/core/en_*
 
 MELLANOX ETHERNET INNOVA DRIVERS
-R:	Boris Pismenny <borisp@mellanox.com>
+R:	Boris Pismenny <borisp@nvidia.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 W:	http://www.mellanox.com
@@ -11099,8 +11099,8 @@ F:	drivers/net/ethernet/mellanox/mlx5/core/fpga/*
 F:	include/linux/mlx5/mlx5_ifc_fpga.h
 
 MELLANOX ETHERNET SWITCH DRIVERS
-M:	Jiri Pirko <jiri@mellanox.com>
-M:	Ido Schimmel <idosch@mellanox.com>
+M:	Jiri Pirko <jiri@nvidia.com>
+M:	Ido Schimmel <idosch@nvidia.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 W:	http://www.mellanox.com
@@ -11109,7 +11109,7 @@ F:	drivers/net/ethernet/mellanox/mlxsw/
 F:	tools/testing/selftests/drivers/net/mlxsw/
 
 MELLANOX FIRMWARE FLASH LIBRARY (mlxfw)
-M:	mlxsw@mellanox.com
+M:	mlxsw@nvidia.com
 L:	netdev@vger.kernel.org
 S:	Supported
 W:	http://www.mellanox.com
@@ -11119,7 +11119,7 @@ F:	drivers/net/ethernet/mellanox/mlxfw/
 MELLANOX HARDWARE PLATFORM SUPPORT
 M:	Andy Shevchenko <andy@infradead.org>
 M:	Darren Hart <dvhart@infradead.org>
-M:	Vadim Pasternak <vadimp@mellanox.com>
+M:	Vadim Pasternak <vadimp@nvidia.com>
 L:	platform-driver-x86@vger.kernel.org
 S:	Supported
 F:	Documentation/ABI/testing/sysfs-platform-mellanox-bootctl
@@ -11127,7 +11127,7 @@ F:	drivers/platform/mellanox/
 F:	include/linux/platform_data/mlxreg.h
 
 MELLANOX MLX4 core VPI driver
-M:	Tariq Toukan <tariqt@mellanox.com>
+M:	Tariq Toukan <tariqt@nvidia.com>
 L:	netdev@vger.kernel.org
 L:	linux-rdma@vger.kernel.org
 S:	Supported
@@ -11137,7 +11137,7 @@ F:	drivers/net/ethernet/mellanox/mlx4/
 F:	include/linux/mlx4/
 
 MELLANOX MLX4 IB driver
-M:	Yishai Hadas <yishaih@mellanox.com>
+M:	Yishai Hadas <yishaih@nvidia.com>
 L:	linux-rdma@vger.kernel.org
 S:	Supported
 W:	http://www.mellanox.com
@@ -11147,8 +11147,8 @@ F:	include/linux/mlx4/
 F:	include/uapi/rdma/mlx4-abi.h
 
 MELLANOX MLX5 core VPI driver
-M:	Saeed Mahameed <saeedm@mellanox.com>
-M:	Leon Romanovsky <leonro@mellanox.com>
+M:	Saeed Mahameed <saeedm@nvidia.com>
+M:	Leon Romanovsky <leonro@nvidia.com>
 L:	netdev@vger.kernel.org
 L:	linux-rdma@vger.kernel.org
 S:	Supported
@@ -11159,7 +11159,7 @@ F:	drivers/net/ethernet/mellanox/mlx5/core/
 F:	include/linux/mlx5/
 
 MELLANOX MLX5 IB driver
-M:	Leon Romanovsky <leonro@mellanox.com>
+M:	Leon Romanovsky <leonro@nvidia.com>
 L:	linux-rdma@vger.kernel.org
 S:	Supported
 W:	http://www.mellanox.com
@@ -11169,8 +11169,8 @@ F:	include/linux/mlx5/
 F:	include/uapi/rdma/mlx5-abi.h
 
 MELLANOX MLXCPLD I2C AND MUX DRIVER
-M:	Vadim Pasternak <vadimp@mellanox.com>
-M:	Michael Shych <michaelsh@mellanox.com>
+M:	Vadim Pasternak <vadimp@nvidia.com>
+M:	Michael Shych <michaelsh@nvidia.com>
 L:	linux-i2c@vger.kernel.org
 S:	Supported
 F:	Documentation/i2c/busses/i2c-mlxcpld.rst
@@ -11178,7 +11178,7 @@ F:	drivers/i2c/busses/i2c-mlxcpld.c
 F:	drivers/i2c/muxes/i2c-mux-mlxcpld.c
 
 MELLANOX MLXCPLD LED DRIVER
-M:	Vadim Pasternak <vadimp@mellanox.com>
+M:	Vadim Pasternak <vadimp@nvidia.com>
 L:	linux-leds@vger.kernel.org
 S:	Supported
 F:	Documentation/leds/leds-mlxcpld.rst
@@ -11186,7 +11186,7 @@ F:	drivers/leds/leds-mlxcpld.c
 F:	drivers/leds/leds-mlxreg.c
 
 MELLANOX PLATFORM DRIVER
-M:	Vadim Pasternak <vadimp@mellanox.com>
+M:	Vadim Pasternak <vadimp@nvidia.com>
 L:	platform-driver-x86@vger.kernel.org
 S:	Supported
 F:	drivers/platform/x86/mlx-platform.c
@@ -12167,8 +12167,8 @@ F:	net/ipv6/syncookies.c
 F:	net/ipv6/tcp*.c
 
 NETWORKING [TLS]
-M:	Boris Pismenny <borisp@mellanox.com>
-M:	Aviad Yehezkel <aviadye@mellanox.com>
+M:	Boris Pismenny <borisp@nvidia.com>
+M:	Aviad Yehezkel <aviadye@nvidia.com>
 M:	John Fastabend <john.fastabend@gmail.com>
 M:	Daniel Borkmann <daniel@iogearbox.net>
 M:	Jakub Kicinski <kuba@kernel.org>
@@ -12468,7 +12468,7 @@ S:	Supported
 F:	drivers/nfc/nxp-nci
 
 OBJAGG
-M:	Jiri Pirko <jiri@mellanox.com>
+M:	Jiri Pirko <jiri@nvidia.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	include/linux/objagg.h
@@ -13110,7 +13110,7 @@ F:	drivers/video/logo/logo_parisc*
 F:	include/linux/hp_sdc.h
 
 PARMAN
-M:	Jiri Pirko <jiri@mellanox.com>
+M:	Jiri Pirko <jiri@nvidia.com>
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	include/linux/parman.h
@@ -16034,7 +16034,7 @@ F:	drivers/infiniband/sw/siw/
 F:	include/uapi/rdma/siw-abi.h
 
 SOFT-ROCE DRIVER (rxe)
-M:	Zhu Yanjun <yanjunz@mellanox.com>
+M:	Zhu Yanjun <yanjunz@nvidia.com>
 L:	linux-rdma@vger.kernel.org
 S:	Supported
 F:	drivers/infiniband/sw/rxe/
-- 
GitLab


From 5e7820e369248f880767c4c4079b414529bc2125 Mon Sep 17 00:00:00 2001
From: Brent Lu <brent.lu@intel.com>
Date: Fri, 31 Jul 2020 20:26:04 +0800
Subject: [PATCH 0418/1341] ASoC: intel: atom: Add period size constraint

Use constraint to make sure the period size could always be multiple
of 1ms to align with the fundamental design/limitation of firmware.

Signed-off-by: Brent Lu <brent.lu@intel.com>
Link: https://lore.kernel.org/r/1596198365-10105-2-git-send-email-brent.lu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/intel/atom/sst-mfld-platform-pcm.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sound/soc/intel/atom/sst-mfld-platform-pcm.c b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
index b1cac7abdc0ab..fba2c795ce0da 100644
--- a/sound/soc/intel/atom/sst-mfld-platform-pcm.c
+++ b/sound/soc/intel/atom/sst-mfld-platform-pcm.c
@@ -333,6 +333,17 @@ static int sst_media_open(struct snd_pcm_substream *substream,
 	if (ret_val < 0)
 		goto out_power_up;
 
+	/*
+	 * Make sure the period to be multiple of 1ms to align the
+	 * design of firmware. Apply same rule to buffer size to make
+	 * sure alsa could always find a value for period size
+	 * regardless the buffer size given by user space.
+	 */
+	snd_pcm_hw_constraint_step(substream->runtime, 0,
+			   SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 48);
+	snd_pcm_hw_constraint_step(substream->runtime, 0,
+			   SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 48);
+
 	/* Make sure, that the period size is always even */
 	snd_pcm_hw_constraint_step(substream->runtime, 0,
 			   SNDRV_PCM_HW_PARAM_PERIODS, 2);
-- 
GitLab


From 6a3ea3e68b8a8a26c4aaac03432ed92269c9a14e Mon Sep 17 00:00:00 2001
From: Sean Christopherson <sean.j.christopherson@intel.com>
Date: Fri, 21 Aug 2020 06:52:29 -0400
Subject: [PATCH 0419/1341] x86/entry/64: Do not use RDPID in paranoid entry to
 accomodate KVM

KVM has an optmization to avoid expensive MRS read/writes on
VMENTER/EXIT. It caches the MSR values and restores them either when
leaving the run loop, on preemption or when going out to user space.

The affected MSRs are not required for kernel context operations. This
changed with the recently introduced mechanism to handle FSGSBASE in the
paranoid entry code which has to retrieve the kernel GSBASE value by
accessing per CPU memory. The mechanism needs to retrieve the CPU number
and uses either LSL or RDPID if the processor supports it.

Unfortunately RDPID uses MSR_TSC_AUX which is in the list of cached and
lazily restored MSRs, which means between the point where the guest value
is written and the point of restore, MSR_TSC_AUX contains a random number.

If an NMI or any other exception which uses the paranoid entry path happens
in such a context, then RDPID returns the random guest MSR_TSC_AUX value.

As a consequence this reads from the wrong memory location to retrieve the
kernel GSBASE value. Kernel GS is used to for all regular this_cpu_*()
operations. If the GSBASE in the exception handler points to the per CPU
memory of a different CPU then this has the obvious consequences of data
corruption and crashes.

As the paranoid entry path is the only place which accesses MSR_TSX_AUX
(via RDPID) and the fallback via LSL is not significantly slower, remove
the RDPID alternative from the entry path and always use LSL.

The alternative would be to write MSR_TSC_AUX on every VMENTER and VMEXIT
which would be inflicting massive overhead on that code path.

[ tglx: Rewrote changelog ]

Fixes: eaad981291ee3 ("x86/entry/64: Introduce the FIND_PERCPU_BASE macro")
Reported-by: Tom Lendacky <thomas.lendacky@amd.com>
Debugged-by: Tom Lendacky <thomas.lendacky@amd.com>
Suggested-by: Andy Lutomirski <luto@kernel.org>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200821105229.18938-1-pbonzini@redhat.com
---
 arch/x86/entry/calling.h | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
index 98e4d8886f11c..ae9b0d4615b32 100644
--- a/arch/x86/entry/calling.h
+++ b/arch/x86/entry/calling.h
@@ -374,12 +374,14 @@ For 32-bit we have the following conventions - kernel is built with
  * Fetch the per-CPU GSBASE value for this processor and put it in @reg.
  * We normally use %gs for accessing per-CPU data, but we are setting up
  * %gs here and obviously can not use %gs itself to access per-CPU data.
+ *
+ * Do not use RDPID, because KVM loads guest's TSC_AUX on vm-entry and
+ * may not restore the host's value until the CPU returns to userspace.
+ * Thus the kernel would consume a guest's TSC_AUX if an NMI arrives
+ * while running KVM's run loop.
  */
 .macro GET_PERCPU_BASE reg:req
-	ALTERNATIVE \
-		"LOAD_CPU_AND_NODE_SEG_LIMIT \reg", \
-		"RDPID	\reg", \
-		X86_FEATURE_RDPID
+	LOAD_CPU_AND_NODE_SEG_LIMIT \reg
 	andq	$VDSO_CPUNODE_MASK, \reg
 	movq	__per_cpu_offset(, \reg, 8), \reg
 .endm
-- 
GitLab


From d88d59b64ca35abae208e2781fdb45e69cbed56c Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 19 Aug 2020 21:44:39 +0200
Subject: [PATCH 0420/1341] core/entry: Respect syscall number rewrites

The transcript of the x86 entry code to the generic version failed to
reload the syscall number from ptregs after ptrace and seccomp have run,
which both can modify the syscall number in ptregs. It returns the original
syscall number instead which is obviously not the right thing to do.

Reload the syscall number to fix that.

Fixes: 142781e108b1 ("entry: Provide generic syscall entry functionality")
Reported-by: Kyle Huey <me@kylehuey.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Kyle Huey <me@kylehuey.com>
Tested-by: Kees Cook <keescook@chromium.org>
Acked-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/87blj6ifo8.fsf@nanos.tec.linutronix.de
---
 kernel/entry/common.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/entry/common.c b/kernel/entry/common.c
index 9852e0d62d95c..fcae019158cad 100644
--- a/kernel/entry/common.c
+++ b/kernel/entry/common.c
@@ -65,7 +65,8 @@ static long syscall_trace_enter(struct pt_regs *regs, long syscall,
 
 	syscall_enter_audit(regs, syscall);
 
-	return ret ? : syscall;
+	/* The above might have changed the syscall number */
+	return ret ? : syscall_get_nr(current, regs);
 }
 
 noinstr long syscall_enter_from_user_mode(struct pt_regs *regs, long syscall)
-- 
GitLab


From 3c27ea23ffb43262da6c64964163895951aaed4e Mon Sep 17 00:00:00 2001
From: Stephan Gerhold <stephan@gerhold.net>
Date: Thu, 20 Aug 2020 17:45:11 +0200
Subject: [PATCH 0421/1341] ASoC: qcom: Set card->owner to avoid warnings

On Linux 5.9-rc1 I get the following warning with apq8016-sbc:

WARNING: CPU: 2 PID: 69 at sound/core/init.c:207 snd_card_new+0x36c/0x3b0 [snd]
CPU: 2 PID: 69 Comm: kworker/2:1 Not tainted 5.9.0-rc1 #1
Workqueue: events deferred_probe_work_func
pc : snd_card_new+0x36c/0x3b0 [snd]
lr : snd_card_new+0xf4/0x3b0 [snd]
Call trace:
 snd_card_new+0x36c/0x3b0 [snd]
 snd_soc_bind_card+0x340/0x9a0 [snd_soc_core]
 snd_soc_register_card+0xf4/0x110 [snd_soc_core]
 devm_snd_soc_register_card+0x44/0xa0 [snd_soc_core]
 apq8016_sbc_platform_probe+0x11c/0x140 [snd_soc_apq8016_sbc]

This warning was introduced in
commit 81033c6b584b ("ALSA: core: Warn on empty module").
It looks like we are supposed to set card->owner to THIS_MODULE.

Fix this for all the qcom ASoC drivers.

Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Fixes: 79119c798649 ("ASoC: qcom: Add Storm machine driver")
Fixes: bdb052e81f62 ("ASoC: qcom: add apq8016 sound card support")
Fixes: a6f933f63f2f ("ASoC: qcom: apq8096: Add db820c machine driver")
Fixes: 6b1687bf76ef ("ASoC: qcom: add sdm845 sound card support")
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Link: https://lore.kernel.org/r/20200820154511.203072-1-stephan@gerhold.net
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/qcom/apq8016_sbc.c | 1 +
 sound/soc/qcom/apq8096.c     | 1 +
 sound/soc/qcom/sdm845.c      | 1 +
 sound/soc/qcom/storm.c       | 1 +
 4 files changed, 4 insertions(+)

diff --git a/sound/soc/qcom/apq8016_sbc.c b/sound/soc/qcom/apq8016_sbc.c
index 083413abc2f69..575e2aefefe3d 100644
--- a/sound/soc/qcom/apq8016_sbc.c
+++ b/sound/soc/qcom/apq8016_sbc.c
@@ -143,6 +143,7 @@ static int apq8016_sbc_platform_probe(struct platform_device *pdev)
 
 	card = &data->card;
 	card->dev = dev;
+	card->owner = THIS_MODULE;
 	card->dapm_widgets = apq8016_sbc_dapm_widgets;
 	card->num_dapm_widgets = ARRAY_SIZE(apq8016_sbc_dapm_widgets);
 
diff --git a/sound/soc/qcom/apq8096.c b/sound/soc/qcom/apq8096.c
index 253549600c5a3..1a69baefc5cea 100644
--- a/sound/soc/qcom/apq8096.c
+++ b/sound/soc/qcom/apq8096.c
@@ -114,6 +114,7 @@ static int apq8096_platform_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	card->dev = dev;
+	card->owner = THIS_MODULE;
 	dev_set_drvdata(dev, card);
 	ret = qcom_snd_parse_of(card);
 	if (ret)
diff --git a/sound/soc/qcom/sdm845.c b/sound/soc/qcom/sdm845.c
index 0d10fba53945e..ab1bf23c21a68 100644
--- a/sound/soc/qcom/sdm845.c
+++ b/sound/soc/qcom/sdm845.c
@@ -555,6 +555,7 @@ static int sdm845_snd_platform_probe(struct platform_device *pdev)
 	card->dapm_widgets = sdm845_snd_widgets;
 	card->num_dapm_widgets = ARRAY_SIZE(sdm845_snd_widgets);
 	card->dev = dev;
+	card->owner = THIS_MODULE;
 	dev_set_drvdata(dev, card);
 	ret = qcom_snd_parse_of(card);
 	if (ret)
diff --git a/sound/soc/qcom/storm.c b/sound/soc/qcom/storm.c
index c0c388d4db829..80c9cf2f254a7 100644
--- a/sound/soc/qcom/storm.c
+++ b/sound/soc/qcom/storm.c
@@ -96,6 +96,7 @@ static int storm_platform_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	card->dev = &pdev->dev;
+	card->owner = THIS_MODULE;
 
 	ret = snd_soc_of_parse_card_name(card, "qcom,model");
 	if (ret) {
-- 
GitLab


From 226a88de473e475cb9f993682a1c7d0c2b451ad8 Mon Sep 17 00:00:00 2001
From: Stefano Brivio <sbrivio@redhat.com>
Date: Wed, 19 Aug 2020 23:59:14 +0200
Subject: [PATCH 0422/1341] netfilter: nft_set_rbtree: Handle outcomes of tree
 rotations in overlap detection

Checks for partial overlaps on insertion assume that end elements
are always descendant nodes of their corresponding start, because
they are inserted later. However, this is not the case if a
previous delete operation caused a tree rotation as part of
rebalancing.

Taking the issue reported by Andreas Fischer as an example, if we
omit delete operations, the existing procedure works because,
equivalently, we are inserting a start item with value 40 in the
this region of the red-black tree with single-sized intervals:

                                  overlap flag
                   10 (start)
                  /  \            false
                      20 (start)
                     /  \         false
                         30 (start)
                        /  \      false
                            60 (start)
                           /  \   false
                         50 (end)
                        /  \      false
                      20 (end)
                     /  \         false
                         40 (start)

if we now delete interval 30 - 30, the tree can be rearranged in
a way similar to this (note the rotation involving 50 - 50):

                                  overlap flag
                   10 (start)
                  /  \            false
                      20 (start)
                     /  \         false
                         25 (start)
                        /  \      false
                            70 (start)
                           /  \   false
                         50 (end)
                        /  \      true (from rule a1.)
                      50 (start)
                     /  \         true
                   40 (start)

and we traverse interval 50 - 50 from the opposite direction
compared to what was expected.

To deal with those cases, add a start-before-start rule, b4.,
that covers traversal of existing intervals from the right.

We now need to restrict start-after-end rule b3. to cases
where there are no occurring nodes between existing start and
end elements, because addition of rule b4. isn't sufficient to
ensure that the pre-existing end element we encounter while
descending the tree corresponds to a start element of an
interval that we already traversed entirely.

Different types of overlap detection on trees with rotations
resulting from re-balancing will be covered by nft test case
sets/0044interval_overlap_1.

Reported-by: Andreas Fischer <netfilter@d9c.eu>
Bugzilla: https://bugzilla.netfilter.org/show_bug.cgi?id=1449
Cc: <stable@vger.kernel.org> # 5.6.x
Fixes: 7c84d41416d8 ("netfilter: nft_set_rbtree: Detect partial overlaps on insertion")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_set_rbtree.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c
index 4b2834fd17b26..27668f4e44ea1 100644
--- a/net/netfilter/nft_set_rbtree.c
+++ b/net/netfilter/nft_set_rbtree.c
@@ -238,21 +238,27 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 	 *
 	 * b1. _ _ __>|  !_ _ __|  (insert end before existing start)
 	 * b2. _ _ ___|  !_ _ _>|  (insert end after existing start)
-	 * b3. _ _ ___! >|_ _ __|  (insert start after existing end)
+	 * b3. _ _ ___! >|_ _ __|  (insert start after existing end, as a leaf)
+	 *            '--' no nodes falling in this range
+	 * b4.          >|_ _   !  (insert start before existing start)
 	 *
 	 * Case a3. resolves to b3.:
 	 * - if the inserted start element is the leftmost, because the '0'
 	 *   element in the tree serves as end element
-	 * - otherwise, if an existing end is found. Note that end elements are
-	 *   always inserted after corresponding start elements.
+	 * - otherwise, if an existing end is found immediately to the left. If
+	 *   there are existing nodes in between, we need to further descend the
+	 *   tree before we can conclude the new start isn't causing an overlap
+	 *
+	 * or to b4., which, preceded by a3., means we already traversed one or
+	 * more existing intervals entirely, from the right.
 	 *
 	 * For a new, rightmost pair of elements, we'll hit cases b3. and b2.,
 	 * in that order.
 	 *
 	 * The flag is also cleared in two special cases:
 	 *
-	 * b4. |__ _ _!|<_ _ _   (insert start right before existing end)
-	 * b5. |__ _ >|!__ _ _   (insert end right after existing start)
+	 * b5. |__ _ _!|<_ _ _   (insert start right before existing end)
+	 * b6. |__ _ >|!__ _ _   (insert end right after existing start)
 	 *
 	 * which always happen as last step and imply that no further
 	 * overlapping is possible.
@@ -272,7 +278,7 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 			if (nft_rbtree_interval_start(new)) {
 				if (nft_rbtree_interval_end(rbe) &&
 				    nft_set_elem_active(&rbe->ext, genmask) &&
-				    !nft_set_elem_expired(&rbe->ext))
+				    !nft_set_elem_expired(&rbe->ext) && !*p)
 					overlap = false;
 			} else {
 				overlap = nft_rbtree_interval_end(rbe) &&
@@ -288,10 +294,9 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 					  nft_set_elem_active(&rbe->ext,
 							      genmask) &&
 					  !nft_set_elem_expired(&rbe->ext);
-			} else if (nft_rbtree_interval_end(rbe) &&
-				   nft_set_elem_active(&rbe->ext, genmask) &&
+			} else if (nft_set_elem_active(&rbe->ext, genmask) &&
 				   !nft_set_elem_expired(&rbe->ext)) {
-				overlap = true;
+				overlap = nft_rbtree_interval_end(rbe);
 			}
 		} else {
 			if (nft_rbtree_interval_end(rbe) &&
-- 
GitLab


From 0726763043dc10dd4c12481f050b1a5ef8f15410 Mon Sep 17 00:00:00 2001
From: Stefano Brivio <sbrivio@redhat.com>
Date: Wed, 19 Aug 2020 23:59:15 +0200
Subject: [PATCH 0423/1341] netfilter: nft_set_rbtree: Detect partial overlap
 with start endpoint match

Getting creative with nft and omitting the interval_overlap()
check from the set_overlap() function, without omitting
set_overlap() altogether, led to the observation of a partial
overlap that wasn't detected, and would actually result in
replacement of the end element of an existing interval.

This is due to the fact that we'll return -EEXIST on a matching,
pre-existing start element, instead of -ENOTEMPTY, and the error
is cleared by API if NLM_F_EXCL is not given. At this point, we
can insert a matching start, and duplicate the end element as long
as we don't end up into other intervals.

For instance, inserting interval 0 - 2 with an existing 0 - 3
interval would result in a single 0 - 2 interval, and a dangling
'3' end element. This is because nft will proceed after inserting
the '0' start element as no error is reported, and no further
conflicting intervals are detected on insertion of the end element.

This needs a different approach as it's a local condition that can
be detected by looking for duplicate ends coming from left and
right, separately. Track those and directly report -ENOTEMPTY on
duplicated end elements for a matching start.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nft_set_rbtree.c | 34 +++++++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nft_set_rbtree.c b/net/netfilter/nft_set_rbtree.c
index 27668f4e44ea1..217ab3644c25b 100644
--- a/net/netfilter/nft_set_rbtree.c
+++ b/net/netfilter/nft_set_rbtree.c
@@ -218,11 +218,11 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 			       struct nft_rbtree_elem *new,
 			       struct nft_set_ext **ext)
 {
+	bool overlap = false, dup_end_left = false, dup_end_right = false;
 	struct nft_rbtree *priv = nft_set_priv(set);
 	u8 genmask = nft_genmask_next(net);
 	struct nft_rbtree_elem *rbe;
 	struct rb_node *parent, **p;
-	bool overlap = false;
 	int d;
 
 	/* Detect overlaps as we descend the tree. Set the flag in these cases:
@@ -262,6 +262,20 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 	 *
 	 * which always happen as last step and imply that no further
 	 * overlapping is possible.
+	 *
+	 * Another special case comes from the fact that start elements matching
+	 * an already existing start element are allowed: insertion is not
+	 * performed but we return -EEXIST in that case, and the error will be
+	 * cleared by the caller if NLM_F_EXCL is not present in the request.
+	 * This way, request for insertion of an exact overlap isn't reported as
+	 * error to userspace if not desired.
+	 *
+	 * However, if the existing start matches a pre-existing start, but the
+	 * end element doesn't match the corresponding pre-existing end element,
+	 * we need to report a partial overlap. This is a local condition that
+	 * can be noticed without need for a tracking flag, by checking for a
+	 * local duplicated end for a corresponding start, from left and right,
+	 * separately.
 	 */
 
 	parent = NULL;
@@ -281,19 +295,35 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 				    !nft_set_elem_expired(&rbe->ext) && !*p)
 					overlap = false;
 			} else {
+				if (dup_end_left && !*p)
+					return -ENOTEMPTY;
+
 				overlap = nft_rbtree_interval_end(rbe) &&
 					  nft_set_elem_active(&rbe->ext,
 							      genmask) &&
 					  !nft_set_elem_expired(&rbe->ext);
+
+				if (overlap) {
+					dup_end_right = true;
+					continue;
+				}
 			}
 		} else if (d > 0) {
 			p = &parent->rb_right;
 
 			if (nft_rbtree_interval_end(new)) {
+				if (dup_end_right && !*p)
+					return -ENOTEMPTY;
+
 				overlap = nft_rbtree_interval_end(rbe) &&
 					  nft_set_elem_active(&rbe->ext,
 							      genmask) &&
 					  !nft_set_elem_expired(&rbe->ext);
+
+				if (overlap) {
+					dup_end_left = true;
+					continue;
+				}
 			} else if (nft_set_elem_active(&rbe->ext, genmask) &&
 				   !nft_set_elem_expired(&rbe->ext)) {
 				overlap = nft_rbtree_interval_end(rbe);
@@ -321,6 +351,8 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
 				p = &parent->rb_left;
 			}
 		}
+
+		dup_end_left = dup_end_right = false;
 	}
 
 	if (overlap)
-- 
GitLab


From 00c54a80cd36de5a0089e7ffd0a690c3a93e65d0 Mon Sep 17 00:00:00 2001
From: Nick Desaulniers <ndesaulniers@google.com>
Date: Thu, 20 Aug 2020 17:41:56 -0700
Subject: [PATCH 0424/1341] mailmap: add Andi Kleen

I keep getting bounce back from the suse.de address.

Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Quentin Perret <qperret@qperret.net>
Link: http://lkml.kernel.org/r/20200818203214.659955-1-ndesaulniers@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 .mailmap | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.mailmap b/.mailmap
index 97fd835bd2a40..21f965400a28d 100644
--- a/.mailmap
+++ b/.mailmap
@@ -32,6 +32,7 @@ Alex Shi <alex.shi@linux.alibaba.com> <alex.shi@intel.com>
 Alex Shi <alex.shi@linux.alibaba.com> <alex.shi@linaro.org>
 Al Viro <viro@ftp.linux.org.uk>
 Al Viro <viro@zenIV.linux.org.uk>
+Andi Kleen <ak@linux.intel.com> <ak@suse.de>
 Andi Shyti <andi@etezian.org> <andi.shyti@samsung.com>
 Andreas Herrmann <aherrman@de.ibm.com>
 Andrew Morton <akpm@linux-foundation.org>
-- 
GitLab


From d5a1695977cf60d3f7b387f4d18bd2fb2a9a7a01 Mon Sep 17 00:00:00 2001
From: Xu Wang <vulab@iscas.ac.cn>
Date: Thu, 20 Aug 2020 17:41:59 -0700
Subject: [PATCH 0425/1341] hugetlb_cgroup: convert comma to semicolon

Replace a comma between expression statements by a semicolon.

Fixes: faced7e0806cf4 ("mm: hugetlb controller for cgroups v2")
Signed-off-by: Xu Wang <vulab@iscas.ac.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Giuseppe Scrivano <gscrivan@redhat.com>
Link: http://lkml.kernel.org/r/20200818064333.21759-1-vulab@iscas.ac.cn
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/hugetlb_cgroup.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c
index aabf65d4d91ba..1f87aec9ab5c7 100644
--- a/mm/hugetlb_cgroup.c
+++ b/mm/hugetlb_cgroup.c
@@ -655,7 +655,7 @@ static void __init __hugetlb_cgroup_file_dfl_init(int idx)
 	snprintf(cft->name, MAX_CFTYPE_NAME, "%s.events", buf);
 	cft->private = MEMFILE_PRIVATE(idx, 0);
 	cft->seq_show = hugetlb_events_show;
-	cft->file_offset = offsetof(struct hugetlb_cgroup, events_file[idx]),
+	cft->file_offset = offsetof(struct hugetlb_cgroup, events_file[idx]);
 	cft->flags = CFTYPE_NOT_ON_ROOT;
 
 	/* Add the events.local file */
@@ -664,7 +664,7 @@ static void __init __hugetlb_cgroup_file_dfl_init(int idx)
 	cft->private = MEMFILE_PRIVATE(idx, 0);
 	cft->seq_show = hugetlb_events_local_show;
 	cft->file_offset = offsetof(struct hugetlb_cgroup,
-				    events_local_file[idx]),
+				    events_local_file[idx]);
 	cft->flags = CFTYPE_NOT_ON_ROOT;
 
 	/* NULL terminate the last cft */
-- 
GitLab


From f3f99d63a8156c7a4a6b20aac22b53c5579c7dc1 Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hughd@google.com>
Date: Thu, 20 Aug 2020 17:42:02 -0700
Subject: [PATCH 0426/1341] khugepaged: adjust VM_BUG_ON_MM() in
 __khugepaged_enter()

syzbot crashes on the VM_BUG_ON_MM(khugepaged_test_exit(mm), mm) in
__khugepaged_enter(): yes, when one thread is about to dump core, has set
core_state, and is waiting for others, another might do something calling
__khugepaged_enter(), which now crashes because I lumped the core_state
test (known as "mmget_still_valid") into khugepaged_test_exit().  I still
think it's best to lump them together, so just in this exceptional case,
check mm->mm_users directly instead of khugepaged_test_exit().

Fixes: bbe98f9cadff ("khugepaged: khugepaged_test_exit() check mmget_still_valid()")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Yang Shi <shy828301@gmail.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Song Liu <songliubraving@fb.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: <stable@vger.kernel.org>	[4.8+]
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008141503370.18085@eggly.anvils
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/khugepaged.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index 15a9af791014c..e749e568e1eab 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -466,7 +466,7 @@ int __khugepaged_enter(struct mm_struct *mm)
 		return -ENOMEM;
 
 	/* __khugepaged_exit() must not run from under us */
-	VM_BUG_ON_MM(khugepaged_test_exit(mm), mm);
+	VM_BUG_ON_MM(atomic_read(&mm->mm_users) == 0, mm);
 	if (unlikely(test_and_set_bit(MMF_VM_HUGEPAGE, &mm->flags))) {
 		free_mm_slot(mm_slot);
 		return 0;
-- 
GitLab


From e47110e90584a22e9980510b00d0dfad3a83354e Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Date: Thu, 20 Aug 2020 17:42:05 -0700
Subject: [PATCH 0427/1341] mm/vunmap: add cond_resched() in vunmap_pmd_range

Like zap_pte_range add cond_resched so that we can avoid softlockups as
reported below.  On non-preemptible kernel with large I/O map region (like
the one we get when using persistent memory with sector mode), an unmap of
the namespace can report below softlockups.

22724.027334] watchdog: BUG: soft lockup - CPU#49 stuck for 23s! [ndctl:50777]
 NIP [c0000000000dc224] plpar_hcall+0x38/0x58
 LR [c0000000000d8898] pSeries_lpar_hpte_invalidate+0x68/0xb0
 Call Trace:
    flush_hash_page+0x114/0x200
    hpte_need_flush+0x2dc/0x540
    vunmap_page_range+0x538/0x6f0
    free_unmap_vmap_area+0x30/0x70
    remove_vm_area+0xfc/0x140
    __vunmap+0x68/0x270
    __iounmap.part.0+0x34/0x60
    memunmap+0x54/0x70
    release_nodes+0x28c/0x300
    device_release_driver_internal+0x16c/0x280
    unbind_store+0x124/0x170
    drv_attr_store+0x44/0x60
    sysfs_kf_write+0x64/0x90
    kernfs_fop_write+0x1b0/0x290
    __vfs_write+0x3c/0x70
    vfs_write+0xd8/0x260
    ksys_write+0xdc/0x130
    system_call+0x5c/0x70

Reported-by: Harish Sriram <harish@linux.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200807075933.310240-1-aneesh.kumar@linux.ibm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/vmalloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index b482d240f9a25..be4724b916b3e 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -104,6 +104,8 @@ static void vunmap_pmd_range(pud_t *pud, unsigned long addr, unsigned long end,
 		if (pmd_none_or_clear_bad(pmd))
 			continue;
 		vunmap_pte_range(pmd, addr, next, mask);
+
+		cond_resched();
 	} while (pmd++, addr = next, addr != end);
 }
 
-- 
GitLab


From 86f54bb7e4ff22ad5dd0b1e179610cc8bbb3bd63 Mon Sep 17 00:00:00 2001
From: Leon Romanovsky <leonro@nvidia.com>
Date: Thu, 20 Aug 2020 17:42:08 -0700
Subject: [PATCH 0428/1341] mm/rodata_test.c: fix missing function declaration

The compilation with CONFIG_DEBUG_RODATA_TEST set produces the following
warning due to the missing include.

 mm/rodata_test.c:15:6: warning: no previous prototype for 'rodata_test' [-Wmissing-prototypes]
    15 | void rodata_test(void)
       |      ^~~~~~~~~~~

Fixes: 2959a5f726f6 ("mm: add arch-independent testcases for RODATA")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lkml.kernel.org/r/20200819080026.918134-1-leon@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/rodata_test.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mm/rodata_test.c b/mm/rodata_test.c
index 2a99df7beeb35..2613371945b7e 100644
--- a/mm/rodata_test.c
+++ b/mm/rodata_test.c
@@ -7,6 +7,7 @@
  */
 #define pr_fmt(fmt) "rodata_test: " fmt
 
+#include <linux/rodata_test.h>
 #include <linux/uaccess.h>
 #include <asm/sections.h>
 
-- 
GitLab


From bcf85fcedfdd17911982a3e3564fcfec7b01eebd Mon Sep 17 00:00:00 2001
From: Jann Horn <jannh@google.com>
Date: Thu, 20 Aug 2020 17:42:11 -0700
Subject: [PATCH 0429/1341] romfs: fix uninitialized memory leak in
 romfs_dev_read()

romfs has a superblock field that limits the size of the filesystem; data
beyond that limit is never accessed.

romfs_dev_read() fetches a caller-supplied number of bytes from the
backing device.  It returns 0 on success or an error code on failure;
therefore, its API can't represent short reads, it's all-or-nothing.

However, when romfs_dev_read() detects that the requested operation would
cross the filesystem size limit, it currently silently truncates the
requested number of bytes.  This e.g.  means that when the content of a
file with size 0x1000 starts one byte before the filesystem size limit,
->readpage() will only fill a single byte of the supplied page while
leaving the rest uninitialized, leaking that uninitialized memory to
userspace.

Fix it by returning an error code instead of truncating the read when the
requested read operation would go beyond the end of the filesystem.

Fixes: da4458bda237 ("NOMMU: Make it possible for RomFS to use MTD devices directly")
Signed-off-by: Jann Horn <jannh@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: David Howells <dhowells@redhat.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200818013202.2246365-1-jannh@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/romfs/storage.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/fs/romfs/storage.c b/fs/romfs/storage.c
index 6b2b4362089e6..b57b3ffcbc327 100644
--- a/fs/romfs/storage.c
+++ b/fs/romfs/storage.c
@@ -217,10 +217,8 @@ int romfs_dev_read(struct super_block *sb, unsigned long pos,
 	size_t limit;
 
 	limit = romfs_maxsize(sb);
-	if (pos >= limit)
+	if (pos >= limit || buflen > limit - pos)
 		return -EIO;
-	if (buflen > limit - pos)
-		buflen = limit - pos;
 
 #ifdef CONFIG_ROMFS_ON_MTD
 	if (sb->s_mtd)
-- 
GitLab


From 71e843295c680898959b22dc877ae3839cc22470 Mon Sep 17 00:00:00 2001
From: Wei Yongjun <weiyongjun1@huawei.com>
Date: Thu, 20 Aug 2020 17:42:14 -0700
Subject: [PATCH 0430/1341] kernel/relay.c: fix memleak on destroy relay
 channel

kmemleak report memory leak as follows:

  unreferenced object 0x607ee4e5f948 (size 8):
  comm "syz-executor.1", pid 2098, jiffies 4295031601 (age 288.468s)
  hex dump (first 8 bytes):
  00 00 00 00 00 00 00 00 ........
  backtrace:
     relay_open kernel/relay.c:583 [inline]
     relay_open+0xb6/0x970 kernel/relay.c:563
     do_blk_trace_setup+0x4a8/0xb20 kernel/trace/blktrace.c:557
     __blk_trace_setup+0xb6/0x150 kernel/trace/blktrace.c:597
     blk_trace_ioctl+0x146/0x280 kernel/trace/blktrace.c:738
     blkdev_ioctl+0xb2/0x6a0 block/ioctl.c:613
     block_ioctl+0xe5/0x120 fs/block_dev.c:1871
     vfs_ioctl fs/ioctl.c:48 [inline]
     __do_sys_ioctl fs/ioctl.c:753 [inline]
     __se_sys_ioctl fs/ioctl.c:739 [inline]
     __x64_sys_ioctl+0x170/0x1ce fs/ioctl.c:739
     do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46
     entry_SYSCALL_64_after_hwframe+0x44/0xa9

'chan->buf' is malloced in relay_open() by alloc_percpu() but not free
while destroy the relay channel.  Fix it by adding free_percpu() before
return from relay_destroy_channel().

Fixes: 017c59c042d0 ("relay: Use per CPU constructs for the relay channel buffer pointers")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: David Rientjes <rientjes@google.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Daniel Axtens <dja@axtens.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Akash Goel <akash.goel@intel.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200817122826.48518-1-weiyongjun1@huawei.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 kernel/relay.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/relay.c b/kernel/relay.c
index 72fe443ea78f0..fb4e0c530c080 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -197,6 +197,7 @@ static struct rchan_buf *relay_create_buf(struct rchan *chan)
 static void relay_destroy_channel(struct kref *kref)
 {
 	struct rchan *chan = container_of(kref, struct rchan, kref);
+	free_percpu(chan->buf);
 	kfree(chan);
 }
 
-- 
GitLab


From c17c3dc9d08b9aad9a55a1e53f205187972f448e Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hughd@google.com>
Date: Thu, 20 Aug 2020 17:42:17 -0700
Subject: [PATCH 0431/1341] uprobes: __replace_page() avoid BUG in
 munlock_vma_page()

syzbot crashed on the VM_BUG_ON_PAGE(PageTail) in munlock_vma_page(), when
called from uprobes __replace_page().  Which of many ways to fix it?
Settled on not calling when PageCompound (since Head and Tail are equals
in this context, PageCompound the usual check in uprobes.c, and the prior
use of FOLL_SPLIT_PMD will have cleared PageMlocked already).

Fixes: 5a52c9df62b4 ("uprobe: use FOLL_SPLIT_PMD instead of FOLL_SPLIT")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: <stable@vger.kernel.org>	[5.4+]
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008161338360.20413@eggly.anvils
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 kernel/events/uprobes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 649fd53dc9ad0..0e18aaf23a7b4 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -205,7 +205,7 @@ static int __replace_page(struct vm_area_struct *vma, unsigned long addr,
 		try_to_free_swap(old_page);
 	page_vma_mapped_walk_done(&pvmw);
 
-	if (vma->vm_flags & VM_LOCKED)
+	if ((vma->vm_flags & VM_LOCKED) && !PageCompound(old_page))
 		munlock_vma_page(old_page);
 	put_page(old_page);
 
-- 
GitLab


From f26044c83e6e473a61917f5db411d1417327d425 Mon Sep 17 00:00:00 2001
From: Phillip Lougher <phillip@squashfs.org.uk>
Date: Thu, 20 Aug 2020 17:42:21 -0700
Subject: [PATCH 0432/1341] squashfs: avoid bio_alloc() failure with 1Mbyte
 blocks

This is a regression introduced by the patch "migrate from ll_rw_block
usage to BIO".

Bio_alloc() is limited to 256 pages (1 Mbyte).  This can cause a failure
when reading 1 Mbyte block filesystems.  The problem is a datablock can be
fully (or almost uncompressed), requiring 256 pages, but, because blocks
are not aligned to page boundaries, it may require 257 pages to read.

Bio_kmalloc() can handle 1024 pages, and so use this for the edge
condition.

Fixes: 93e72b3c612a ("squashfs: migrate from ll_rw_block usage to BIO")
Reported-by: Nicolas Prochazka <nicolas.prochazka@gmail.com>
Reported-by: Tomoatsu Shimada <shimada@walbrix.com>
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Cc: Philippe Liard <pliard@google.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Adrien Schildknecht <adrien+dev@schischi.me>
Cc: Daniel Rosenberg <drosen@google.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/20200815035637.15319-1-phillip@squashfs.org.uk
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/squashfs/block.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/squashfs/block.c b/fs/squashfs/block.c
index 76bb1c846845e..8a19773b5a0b7 100644
--- a/fs/squashfs/block.c
+++ b/fs/squashfs/block.c
@@ -87,7 +87,11 @@ static int squashfs_bio_read(struct super_block *sb, u64 index, int length,
 	int error, i;
 	struct bio *bio;
 
-	bio = bio_alloc(GFP_NOIO, page_count);
+	if (page_count <= BIO_MAX_PAGES)
+		bio = bio_alloc(GFP_NOIO, page_count);
+	else
+		bio = bio_kmalloc(GFP_NOIO, page_count);
+
 	if (!bio)
 		return -ENOMEM;
 
-- 
GitLab


From e08d3fdfe2dafa0331843f70ce1ff6c1c4900bf4 Mon Sep 17 00:00:00 2001
From: Doug Berger <opendmb@gmail.com>
Date: Thu, 20 Aug 2020 17:42:24 -0700
Subject: [PATCH 0433/1341] mm: include CMA pages in lowmem_reserve at boot

The lowmem_reserve arrays provide a means of applying pressure against
allocations from lower zones that were targeted at higher zones.  Its
values are a function of the number of pages managed by higher zones and
are assigned by a call to the setup_per_zone_lowmem_reserve() function.

The function is initially called at boot time by the function
init_per_zone_wmark_min() and may be called later by accesses of the
/proc/sys/vm/lowmem_reserve_ratio sysctl file.

The function init_per_zone_wmark_min() was moved up from a module_init to
a core_initcall to resolve a sequencing issue with khugepaged.
Unfortunately this created a sequencing issue with CMA page accounting.

The CMA pages are added to the managed page count of a zone when
cma_init_reserved_areas() is called at boot also as a core_initcall.  This
makes it uncertain whether the CMA pages will be added to the managed page
counts of their zones before or after the call to
init_per_zone_wmark_min() as it becomes dependent on link order.  With the
current link order the pages are added to the managed count after the
lowmem_reserve arrays are initialized at boot.

This means the lowmem_reserve values at boot may be lower than the values
used later if /proc/sys/vm/lowmem_reserve_ratio is accessed even if the
ratio values are unchanged.

In many cases the difference is not significant, but for example
an ARM platform with 1GB of memory and the following memory layout

  cma: Reserved 256 MiB at 0x0000000030000000
  Zone ranges:
    DMA      [mem 0x0000000000000000-0x000000002fffffff]
    Normal   empty
    HighMem  [mem 0x0000000030000000-0x000000003fffffff]

would result in 0 lowmem_reserve for the DMA zone.  This would allow
userspace to deplete the DMA zone easily.

Funnily enough

  $ cat /proc/sys/vm/lowmem_reserve_ratio

would fix up the situation because as a side effect it forces
setup_per_zone_lowmem_reserve.

This commit breaks the link order dependency by invoking
init_per_zone_wmark_min() as a postcore_initcall so that the CMA pages
have the chance to be properly accounted in their zone(s) and allowing
the lowmem_reserve arrays to receive consistent values.

Fixes: bc22af74f271 ("mm: update min_free_kbytes from khugepaged after core initialization")
Signed-off-by: Doug Berger <opendmb@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Jason Baron <jbaron@akamai.com>
Cc: David Rientjes <rientjes@google.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/1597423766-27849-1-git-send-email-opendmb@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 0e2bab486fea6..f4b3b91bbe7f1 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7888,7 +7888,7 @@ int __meminit init_per_zone_wmark_min(void)
 
 	return 0;
 }
-core_initcall(init_per_zone_wmark_min)
+postcore_initcall(init_per_zone_wmark_min)
 
 /*
  * min_free_kbytes_sysctl_handler - just a wrapper around proc_dointvec() so
-- 
GitLab


From 88e8ac11d2ea3acc003cf01bb5a38c8aa76c3cfd Mon Sep 17 00:00:00 2001
From: Charan Teja Reddy <charante@codeaurora.org>
Date: Thu, 20 Aug 2020 17:42:27 -0700
Subject: [PATCH 0434/1341] mm, page_alloc: fix core hung in
 free_pcppages_bulk()

The following race is observed with the repeated online, offline and a
delay between two successive online of memory blocks of movable zone.

P1						P2

Online the first memory block in
the movable zone. The pcp struct
values are initialized to default
values,i.e., pcp->high = 0 &
pcp->batch = 1.

					Allocate the pages from the
					movable zone.

Try to Online the second memory
block in the movable zone thus it
entered the online_pages() but yet
to call zone_pcp_update().
					This process is entered into
					the exit path thus it tries
					to release the order-0 pages
					to pcp lists through
					free_unref_page_commit().
					As pcp->high = 0, pcp->count = 1
					proceed to call the function
					free_pcppages_bulk().
Update the pcp values thus the
new pcp values are like, say,
pcp->high = 378, pcp->batch = 63.
					Read the pcp's batch value using
					READ_ONCE() and pass the same to
					free_pcppages_bulk(), pcp values
					passed here are, batch = 63,
					count = 1.

					Since num of pages in the pcp
					lists are less than ->batch,
					then it will stuck in
					while(list_empty(list)) loop
					with interrupts disabled thus
					a core hung.

Avoid this by ensuring free_pcppages_bulk() is called with proper count of
pcp list pages.

The mentioned race is some what easily reproducible without [1] because
pcp's are not updated for the first memory block online and thus there is
a enough race window for P2 between alloc+free and pcp struct values
update through onlining of second memory block.

With [1], the race still exists but it is very narrow as we update the pcp
struct values for the first memory block online itself.

This is not limited to the movable zone, it could also happen in cases
with the normal zone (e.g., hotplug to a node that only has DMA memory, or
no other memory yet).

[1]: https://patchwork.kernel.org/patch/11696389/

Fixes: 5f8dcc21211a ("page-allocator: split per-cpu list into one-list-per-migrate-type")
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Vinayak Menon <vinmenon@codeaurora.org>
Cc: <stable@vger.kernel.org> [2.6+]
Link: http://lkml.kernel.org/r/1597150703-19003-1-git-send-email-charante@codeaurora.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/page_alloc.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index f4b3b91bbe7f1..fab5e97dc9ca5 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1302,6 +1302,11 @@ static void free_pcppages_bulk(struct zone *zone, int count,
 	struct page *page, *tmp;
 	LIST_HEAD(head);
 
+	/*
+	 * Ensure proper count is passed which otherwise would stuck in the
+	 * below while (list_empty(list)) loop.
+	 */
+	count = min(pcp->count, count);
 	while (count) {
 		struct list_head *list;
 
-- 
GitLab


From 6f03bf43ee05b31d3822def2a80f11b3591c55b3 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Thu, 20 Aug 2020 14:12:54 +0200
Subject: [PATCH 0435/1341] netfilter: nf_tables: add NFTA_SET_USERDATA if not
 null

Kernel sends an empty NFTA_SET_USERDATA attribute with no value if
userspace adds a set with no NFTA_SET_USERDATA attribute.

Fixes: e6d8ecac9e68 ("netfilter: nf_tables: Add new attributes into nft_set to store user data.")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_tables_api.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index fd814e514f942..71e501c5ad217 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -3770,7 +3770,8 @@ static int nf_tables_fill_set(struct sk_buff *skb, const struct nft_ctx *ctx,
 			goto nla_put_failure;
 	}
 
-	if (nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
+	if (set->udata &&
+	    nla_put(skb, NFTA_SET_USERDATA, set->udlen, set->udata))
 		goto nla_put_failure;
 
 	nest = nla_nest_start_noflag(skb, NFTA_SET_DESC);
-- 
GitLab


From da9125df854ea48a6240c66e8a67be06e2c12c03 Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Thu, 20 Aug 2020 14:12:55 +0200
Subject: [PATCH 0436/1341] netfilter: nf_tables: incorrect enum
 nft_list_attributes definition

This should be NFTA_LIST_UNSPEC instead of NFTA_LIST_UNPEC, all other
similar attribute definitions are postfixed with _UNSPEC.

Fixes: 96518518cc41 ("netfilter: add nftables")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/uapi/linux/netfilter/nf_tables.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/uapi/linux/netfilter/nf_tables.h b/include/uapi/linux/netfilter/nf_tables.h
index 42f351c1f5c53..2b8e12f7a4a65 100644
--- a/include/uapi/linux/netfilter/nf_tables.h
+++ b/include/uapi/linux/netfilter/nf_tables.h
@@ -133,7 +133,7 @@ enum nf_tables_msg_types {
  * @NFTA_LIST_ELEM: list element (NLA_NESTED)
  */
 enum nft_list_attributes {
-	NFTA_LIST_UNPEC,
+	NFTA_LIST_UNSPEC,
 	NFTA_LIST_ELEM,
 	__NFTA_LIST_MAX
 };
-- 
GitLab


From 1e105e6afa6c3d32bfb52c00ffa393894a525c27 Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Thu, 20 Aug 2020 21:05:50 +0200
Subject: [PATCH 0437/1341] netfilter: nf_tables: fix destination register
 zeroing

Following bug was reported via irc:
nft list ruleset
   set knock_candidates_ipv4 {
      type ipv4_addr . inet_service
      size 65535
      elements = { 127.0.0.1 . 123,
                   127.0.0.1 . 123 }
      }
 ..
   udp dport 123 add @knock_candidates_ipv4 { ip saddr . 123 }
   udp dport 123 add @knock_candidates_ipv4 { ip saddr . udp dport }

It should not have been possible to add a duplicate set entry.

After some debugging it turned out that the problem is the immediate
value (123) in the second-to-last rule.

Concatenations use 32bit registers, i.e. the elements are 8 bytes each,
not 6 and it turns out the kernel inserted

inet firewall @knock_candidates_ipv4
        element 0100007f ffff7b00  : 0 [end]
        element 0100007f 00007b00  : 0 [end]

Note the non-zero upper bits of the first element.  It turns out that
nft_immediate doesn't zero the destination register, but this is needed
when the length isn't a multiple of 4.

Furthermore, the zeroing in nft_payload is broken.  We can't use
[len / 4] = 0 -- if len is a multiple of 4, index is off by one.

Skip zeroing in this case and use a conditional instead of (len -1) / 4.

Fixes: 49499c3e6e18 ("netfilter: nf_tables: switch registers to 32 bit addressing")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/net/netfilter/nf_tables.h | 2 ++
 net/netfilter/nft_payload.c       | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index bf9491b77d168..224d194ad29d0 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -143,6 +143,8 @@ static inline u64 nft_reg_load64(const u32 *sreg)
 static inline void nft_data_copy(u32 *dst, const struct nft_data *src,
 				 unsigned int len)
 {
+	if (len % NFT_REG32_SIZE)
+		dst[len / NFT_REG32_SIZE] = 0;
 	memcpy(dst, src, len);
 }
 
diff --git a/net/netfilter/nft_payload.c b/net/netfilter/nft_payload.c
index ed7cb9f747f60..7a2e596384991 100644
--- a/net/netfilter/nft_payload.c
+++ b/net/netfilter/nft_payload.c
@@ -87,7 +87,9 @@ void nft_payload_eval(const struct nft_expr *expr,
 	u32 *dest = &regs->data[priv->dreg];
 	int offset;
 
-	dest[priv->len / NFT_REG32_SIZE] = 0;
+	if (priv->len % NFT_REG32_SIZE)
+		dest[priv->len / NFT_REG32_SIZE] = 0;
+
 	switch (priv->base) {
 	case NFT_PAYLOAD_LL_HEADER:
 		if (!skb_mac_header_was_set(skb))
-- 
GitLab


From 5e0b17b026eb7c6de9baa9b0d45a51b05f05abe1 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Fri, 21 Aug 2020 10:15:12 +0100
Subject: [PATCH 0438/1341] afs: Fix NULL deref in afs_dynroot_depopulate()

If an error occurs during the construction of an afs superblock, it's
possible that an error occurs after a superblock is created, but before
we've created the root dentry.  If the superblock has a dynamic root
(ie.  what's normally mounted on /afs), the afs_kill_super() will call
afs_dynroot_depopulate() to unpin any created dentries - but this will
oops if the root hasn't been created yet.

Fix this by skipping that bit of code if there is no root dentry.

This leads to an oops looking like:

	general protection fault, ...
	KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]
	...
	RIP: 0010:afs_dynroot_depopulate+0x25f/0x529 fs/afs/dynroot.c:385
	...
	Call Trace:
	 afs_kill_super+0x13b/0x180 fs/afs/super.c:535
	 deactivate_locked_super+0x94/0x160 fs/super.c:335
	 afs_get_tree+0x1124/0x1460 fs/afs/super.c:598
	 vfs_get_tree+0x89/0x2f0 fs/super.c:1547
	 do_new_mount fs/namespace.c:2875 [inline]
	 path_mount+0x1387/0x2070 fs/namespace.c:3192
	 do_mount fs/namespace.c:3205 [inline]
	 __do_sys_mount fs/namespace.c:3413 [inline]
	 __se_sys_mount fs/namespace.c:3390 [inline]
	 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3390
	 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

which is oopsing on this line:

	inode_lock(root->d_inode);

presumably because sb->s_root was NULL.

Fixes: 0da0b7fd73e4 ("afs: Display manually added cells in dynamic root mount")
Reported-by: syzbot+c1eff8205244ae7e11a6@syzkaller.appspotmail.com
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/afs/dynroot.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c
index b79879aacc02e..7b784af604fd9 100644
--- a/fs/afs/dynroot.c
+++ b/fs/afs/dynroot.c
@@ -382,15 +382,17 @@ void afs_dynroot_depopulate(struct super_block *sb)
 		net->dynroot_sb = NULL;
 	mutex_unlock(&net->proc_cells_lock);
 
-	inode_lock(root->d_inode);
-
-	/* Remove all the pins for dirs created for manually added cells */
-	list_for_each_entry_safe(subdir, tmp, &root->d_subdirs, d_child) {
-		if (subdir->d_fsdata) {
-			subdir->d_fsdata = NULL;
-			dput(subdir);
+	if (root) {
+		inode_lock(root->d_inode);
+
+		/* Remove all the pins for dirs created for manually added cells */
+		list_for_each_entry_safe(subdir, tmp, &root->d_subdirs, d_child) {
+			if (subdir->d_fsdata) {
+				subdir->d_fsdata = NULL;
+				dput(subdir);
+			}
 		}
-	}
 
-	inode_unlock(root->d_inode);
+		inode_unlock(root->d_inode);
+	}
 }
-- 
GitLab


From 8d75785a814241587802655cc33e384230744f0c Mon Sep 17 00:00:00 2001
From: Stephen Boyd <swboyd@chromium.org>
Date: Mon, 17 Aug 2020 18:49:50 -0700
Subject: [PATCH 0439/1341] ARM64: vdso32: Install vdso32 from vdso_install

Add the 32-bit vdso Makefile to the vdso_install rule so that 'make
vdso_install' installs the 32-bit compat vdso when it is compiled.

Fixes: a7f71a2c8903 ("arm64: compat: Add vDSO")
Signed-off-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Cc: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lore.kernel.org/r/20200818014950.42492-1-swboyd@chromium.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/Makefile               | 1 +
 arch/arm64/kernel/vdso32/Makefile | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 55bc8546d9c74..b45f0124cc16f 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -165,6 +165,7 @@ zinstall install:
 PHONY += vdso_install
 vdso_install:
 	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
+	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 $@
 
 # We use MRPROPER_FILES and CLEAN_FILES now
 archclean:
diff --git a/arch/arm64/kernel/vdso32/Makefile b/arch/arm64/kernel/vdso32/Makefile
index 5139a5f192568..d6adb4677c25f 100644
--- a/arch/arm64/kernel/vdso32/Makefile
+++ b/arch/arm64/kernel/vdso32/Makefile
@@ -208,7 +208,7 @@ quiet_cmd_vdsosym = VDSOSYM $@
       cmd_vdsosym = $(NM) $< | $(gen-vdsosym) | LC_ALL=C sort > $@
 
 # Install commands for the unstripped file
-quiet_cmd_vdso_install = INSTALL $@
+quiet_cmd_vdso_install = INSTALL32 $@
       cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/vdso32.so
 
 vdso.so: $(obj)/vdso.so.dbg
-- 
GitLab


From 93d0c1ab23281fda96490f23cd6f2a1966fdc030 Mon Sep 17 00:00:00 2001
From: Sumit Gupta <sumitg@nvidia.com>
Date: Wed, 12 Aug 2020 01:13:17 +0530
Subject: [PATCH 0440/1341] cpufreq: replace cpu_logical_map() with
 read_cpuid_mpir()

Commit eaecca9e7710 ("arm64: Fix __cpu_logical_map undefined issue")
fixes the issue with building tegra194 cpufreq driver as module. But
the fix might cause problem while supporting physical CPU hotplug[1].

This patch fixes the original problem by avoiding use of cpu_logical_map().
Instead calling read_cpuid_mpidr() to get MPIDR on target CPU.

[1] https://lore.kernel.org/linux-arm-kernel/20200724131059.GB6521@bogus/

Fixes: df320f89359c ("cpufreq: Add Tegra194 cpufreq driver")
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Subject & changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpufreq/tegra194-cpufreq.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/cpufreq/tegra194-cpufreq.c b/drivers/cpufreq/tegra194-cpufreq.c
index bae527e507e01..e1d931c457a73 100644
--- a/drivers/cpufreq/tegra194-cpufreq.c
+++ b/drivers/cpufreq/tegra194-cpufreq.c
@@ -56,9 +56,11 @@ struct read_counters_work {
 
 static struct workqueue_struct *read_counters_wq;
 
-static enum cluster get_cpu_cluster(u8 cpu)
+static void get_cpu_cluster(void *cluster)
 {
-	return MPIDR_AFFINITY_LEVEL(cpu_logical_map(cpu), 1);
+	u64 mpidr = read_cpuid_mpidr() & MPIDR_HWID_BITMASK;
+
+	*((uint32_t *)cluster) = MPIDR_AFFINITY_LEVEL(mpidr, 1);
 }
 
 /*
@@ -186,8 +188,10 @@ static unsigned int tegra194_get_speed(u32 cpu)
 static int tegra194_cpufreq_init(struct cpufreq_policy *policy)
 {
 	struct tegra194_cpufreq_data *data = cpufreq_get_driver_data();
-	int cl = get_cpu_cluster(policy->cpu);
 	u32 cpu;
+	u32 cl;
+
+	smp_call_function_single(policy->cpu, get_cpu_cluster, &cl, true);
 
 	if (cl >= data->num_clusters)
 		return -EINVAL;
-- 
GitLab


From 6556b0a8ef3a51ade1f772ff58807de463fc1b58 Mon Sep 17 00:00:00 2001
From: Furquan Shaikh <furquan@google.com>
Date: Wed, 19 Aug 2020 10:16:56 -0700
Subject: [PATCH 0441/1341] ACPI: SoC: APD: Check return value of
 acpi_dev_get_property()

`fch_misc_setup()` uses `acpi_dev_get_property()` to read the value of
"is-rv" passed in by BIOS in ACPI tables. However, not all BIOSes
might pass in this property and hence it is important to first check
the return value of `acpi_dev_get_property()` before referencing the
object filled by it.

Signed-off-by: Furquan Shaikh <furquan@google.com>
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/acpi_apd.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/acpi_apd.c b/drivers/acpi/acpi_apd.c
index 4c348377a39d8..806b8ce05624b 100644
--- a/drivers/acpi/acpi_apd.c
+++ b/drivers/acpi/acpi_apd.c
@@ -99,8 +99,8 @@ static int fch_misc_setup(struct apd_private_data *pdata)
 	if (ret < 0)
 		return -ENOENT;
 
-	acpi_dev_get_property(adev, "is-rv", ACPI_TYPE_INTEGER, &obj);
-	clk_data->is_rv = obj->integer.value;
+	if (!acpi_dev_get_property(adev, "is-rv", ACPI_TYPE_INTEGER, &obj))
+		clk_data->is_rv = obj->integer.value;
 
 	list_for_each_entry(rentry, &resource_list, node) {
 		clk_data->base = devm_ioremap(&adev->dev, rentry->res->start,
-- 
GitLab


From 17189d9138fec95a7caacc0d6f602a5793d8f5dd Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ardb@kernel.org>
Date: Tue, 18 Aug 2020 11:13:53 +0200
Subject: [PATCH 0442/1341] ACPI: ioremap: avoid redundant rounding to OS page
 size

The arm64 implementation of acpi_os_ioremap() was recently updated to
tighten the checks around which parts of memory are permitted to be
mapped by ACPI code, which generally only needs access to memory regions
that are statically described by firmware, and any attempts to access
memory that is in active use by the OS is generally a bug or a hacking
attempt. This tightening is based on the EFI memory map, which describes
all memory in the system.

The AArch64 architecture permits page sizes of 16k and 64k in addition
to the EFI default, which is 4k, which means that the EFI memory map may
describe regions that cannot be mapped seamlessly if the OS page size is
greater than 4k. This is usually not a problem, given that the EFI spec
does not permit memory regions requiring different memory attributes to
share a 64k page frame, and so the usual rounding to page size performed
by ioremap() is sufficient to deal with this. However, this rounding does
complicate our EFI memory map permission check, due to the loss of
information that occurs when several small regions share a single 64k
page frame (where rounding each of them will result in the same 64k
single page region).

However, due to the fact that the region check occurs *before* the call
to ioremap() where the necessary rounding is performed, we can deal
with this issue simply by removing the redundant rounding performed by
acpi_os_map_iomem(), as it appears to be the only place where the
arguments to a call to acpi_os_ioremap() are rounded up. So omit the
rounding in the call, and instead, apply the necessary masking when
assigning the map->virt member.

Fixes: 1583052d111f ("arm64/acpi: disallow AML memory opregions to access kernel memory")
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/osl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 6ad8cb05f672f..74486bb5029af 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -350,7 +350,7 @@ void __iomem __ref
 
 	pg_off = round_down(phys, PAGE_SIZE);
 	pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
-	virt = acpi_map(pg_off, pg_sz);
+	virt = acpi_map(phys, size);
 	if (!virt) {
 		mutex_unlock(&acpi_ioremap_lock);
 		kfree(map);
@@ -358,7 +358,7 @@ void __iomem __ref
 	}
 
 	INIT_LIST_HEAD(&map->list);
-	map->virt = virt;
+	map->virt = (void __iomem __force *)((unsigned long)virt & PAGE_MASK);
 	map->phys = pg_off;
 	map->size = pg_sz;
 	map->track.refcount = 1;
-- 
GitLab


From c15e1bdda4365a5f17cdadf22bf1c1df13884a9e Mon Sep 17 00:00:00 2001
From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Date: Fri, 21 Aug 2020 13:53:42 +0300
Subject: [PATCH 0443/1341] device property: Fix the secondary firmware node
 handling in set_primary_fwnode()

When the primary firmware node pointer is removed from a
device (set to NULL) the secondary firmware node pointer,
when it exists, is made the primary node for the device.
However, the secondary firmware node pointer of the original
primary firmware node is never cleared (set to NULL).

To avoid situation where the secondary firmware node pointer
is pointing to a non-existing object, clearing it properly
when the primary node is removed from a device in
set_primary_fwnode().

Fixes: 97badf873ab6 ("device property: Make it possible to use secondary firmware nodes")
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/base/core.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index ac1046a382bc0..f6f620aa94086 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -4264,9 +4264,9 @@ static inline bool fwnode_is_primary(struct fwnode_handle *fwnode)
  */
 void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
 {
-	if (fwnode) {
-		struct fwnode_handle *fn = dev->fwnode;
+	struct fwnode_handle *fn = dev->fwnode;
 
+	if (fwnode) {
 		if (fwnode_is_primary(fn))
 			fn = fn->secondary;
 
@@ -4276,8 +4276,12 @@ void set_primary_fwnode(struct device *dev, struct fwnode_handle *fwnode)
 		}
 		dev->fwnode = fwnode;
 	} else {
-		dev->fwnode = fwnode_is_primary(dev->fwnode) ?
-			dev->fwnode->secondary : NULL;
+		if (fwnode_is_primary(fn)) {
+			dev->fwnode = fn->secondary;
+			fn->secondary = NULL;
+		} else {
+			dev->fwnode = NULL;
+		}
 	}
 }
 EXPORT_SYMBOL_GPL(set_primary_fwnode);
-- 
GitLab


From 8aebbbb2d573d0b4afc08b90ac7d73dba2d9da97 Mon Sep 17 00:00:00 2001
From: Jason Baron <jbaron@akamai.com>
Date: Fri, 21 Aug 2020 12:20:14 -0400
Subject: [PATCH 0444/1341] hwmon: (nct7904) Correct divide by 0

We hit a kernel panic due to a divide by 0 in nct7904_read_fan() for
the hwmon_fan_min case. Extend the check to hwmon_fan_input case as well
for safety.

[ 1656.545650] divide error: 0000 [#1] SMP PTI
[ 1656.545779] CPU: 12 PID: 18010 Comm: sensors Not tainted 5.4.47 #1
[ 1656.546065] RIP: 0010:nct7904_read+0x1e9/0x510 [nct7904]
...
[ 1656.546549] RAX: 0000000000149970 RBX: ffffbd6b86bcbe08 RCX: 0000000000000000
...
[ 1656.547548] Call Trace:
[ 1656.547665]  hwmon_attr_show+0x32/0xd0 [hwmon]
[ 1656.547783]  dev_attr_show+0x18/0x50
[ 1656.547898]  sysfs_kf_seq_show+0x99/0x120
[ 1656.548013]  seq_read+0xd8/0x3e0
[ 1656.548127]  vfs_read+0x89/0x130
[ 1656.548234]  ksys_read+0x7d/0xb0
[ 1656.548342]  do_syscall_64+0x48/0x110
[ 1656.548451]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: d65a5102a99f5 ("hwmon: (nct7904) Convert to use new hwmon registration API")
Signed-off-by: Jason Baron <jbaron@akamai.com>
Link: https://lore.kernel.org/r/1598026814-2604-1-git-send-email-jbaron@akamai.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/hwmon/nct7904.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/nct7904.c b/drivers/hwmon/nct7904.c
index b0425694f7022..242ff8bee78dd 100644
--- a/drivers/hwmon/nct7904.c
+++ b/drivers/hwmon/nct7904.c
@@ -231,7 +231,7 @@ static int nct7904_read_fan(struct device *dev, u32 attr, int channel,
 		if (ret < 0)
 			return ret;
 		cnt = ((ret & 0xff00) >> 3) | (ret & 0x1f);
-		if (cnt == 0x1fff)
+		if (cnt == 0 || cnt == 0x1fff)
 			rpm = 0;
 		else
 			rpm = 1350000 / cnt;
@@ -243,7 +243,7 @@ static int nct7904_read_fan(struct device *dev, u32 attr, int channel,
 		if (ret < 0)
 			return ret;
 		cnt = ((ret & 0xff00) >> 3) | (ret & 0x1f);
-		if (cnt == 0x1fff)
+		if (cnt == 0 || cnt == 0x1fff)
 			rpm = 0;
 		else
 			rpm = 1350000 / cnt;
-- 
GitLab


From cecf7560f00a8419396a2ed0f6e5d245ccb4feac Mon Sep 17 00:00:00 2001
From: Tom Rix <trix@redhat.com>
Date: Thu, 20 Aug 2020 06:19:32 -0700
Subject: [PATCH 0445/1341] hwmon: (applesmc) check status earlier.

clang static analysis reports this representative problem

applesmc.c:758:10: warning: 1st function call argument is an
  uninitialized value
        left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

buffer is filled by the earlier call

	ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, ...

This problem is reported because a goto skips the status check.
Other similar problems use data from applesmc_read_key before checking
the status.  So move the checks to before the use.

Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Henrik Rydberg <rydberg@bitmath.org>
Link: https://lore.kernel.org/r/20200820131932.10590-1-trix@redhat.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/hwmon/applesmc.c | 31 ++++++++++++++++---------------
 1 file changed, 16 insertions(+), 15 deletions(-)

diff --git a/drivers/hwmon/applesmc.c b/drivers/hwmon/applesmc.c
index 3166184093157..a18887990f4a2 100644
--- a/drivers/hwmon/applesmc.c
+++ b/drivers/hwmon/applesmc.c
@@ -753,15 +753,18 @@ static ssize_t applesmc_light_show(struct device *dev,
 	}
 
 	ret = applesmc_read_key(LIGHT_SENSOR_LEFT_KEY, buffer, data_length);
+	if (ret)
+		goto out;
 	/* newer macbooks report a single 10-bit bigendian value */
 	if (data_length == 10) {
 		left = be16_to_cpu(*(__be16 *)(buffer + 6)) >> 2;
 		goto out;
 	}
 	left = buffer[2];
+
+	ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
 	if (ret)
 		goto out;
-	ret = applesmc_read_key(LIGHT_SENSOR_RIGHT_KEY, buffer, data_length);
 	right = buffer[2];
 
 out:
@@ -810,12 +813,11 @@ static ssize_t applesmc_show_fan_speed(struct device *dev,
 		  to_index(attr));
 
 	ret = applesmc_read_key(newkey, buffer, 2);
-	speed = ((buffer[0] << 8 | buffer[1]) >> 2);
-
 	if (ret)
 		return ret;
-	else
-		return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
+
+	speed = ((buffer[0] << 8 | buffer[1]) >> 2);
+	return snprintf(sysfsbuf, PAGE_SIZE, "%u\n", speed);
 }
 
 static ssize_t applesmc_store_fan_speed(struct device *dev,
@@ -851,12 +853,11 @@ static ssize_t applesmc_show_fan_manual(struct device *dev,
 	u8 buffer[2];
 
 	ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
-	manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01;
-
 	if (ret)
 		return ret;
-	else
-		return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
+
+	manual = ((buffer[0] << 8 | buffer[1]) >> to_index(attr)) & 0x01;
+	return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", manual);
 }
 
 static ssize_t applesmc_store_fan_manual(struct device *dev,
@@ -872,10 +873,11 @@ static ssize_t applesmc_store_fan_manual(struct device *dev,
 		return -EINVAL;
 
 	ret = applesmc_read_key(FANS_MANUAL, buffer, 2);
-	val = (buffer[0] << 8 | buffer[1]);
 	if (ret)
 		goto out;
 
+	val = (buffer[0] << 8 | buffer[1]);
+
 	if (input)
 		val = val | (0x01 << to_index(attr));
 	else
@@ -951,13 +953,12 @@ static ssize_t applesmc_key_count_show(struct device *dev,
 	u32 count;
 
 	ret = applesmc_read_key(KEY_COUNT_KEY, buffer, 4);
-	count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
-						((u32)buffer[2]<<8) + buffer[3];
-
 	if (ret)
 		return ret;
-	else
-		return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
+
+	count = ((u32)buffer[0]<<24) + ((u32)buffer[1]<<16) +
+						((u32)buffer[2]<<8) + buffer[3];
+	return snprintf(sysfsbuf, PAGE_SIZE, "%d\n", count);
 }
 
 static ssize_t applesmc_key_at_index_read_show(struct device *dev,
-- 
GitLab


From 774d977abfd024e6f73484544b9abe5a5cd62de7 Mon Sep 17 00:00:00 2001
From: Tom Rix <trix@redhat.com>
Date: Fri, 21 Aug 2020 06:56:00 -0700
Subject: [PATCH 0446/1341] net: dsa: b53: check for timeout

clang static analysis reports this problem

b53_common.c:1583:13: warning: The left expression of the compound
  assignment is an uninitialized value. The computed value will
  also be garbage
        ent.port &= ~BIT(port);
        ~~~~~~~~ ^

ent is set by a successful call to b53_arl_read().  Unsuccessful
calls are caught by an switch statement handling specific returns.
b32_arl_read() calls b53_arl_op_wait() which fails with the
unhandled -ETIMEDOUT.

So add -ETIMEDOUT to the switch statement.  Because
b53_arl_op_wait() already prints out a message, do not add another
one.

Fixes: 1da6df85c6fb ("net: dsa: b53: Implement ARL add/del/dump operations")
Signed-off-by: Tom Rix <trix@redhat.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/dsa/b53/b53_common.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 6500179c2ca22..0837ae0e0c5e2 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1554,6 +1554,8 @@ static int b53_arl_op(struct b53_device *dev, int op, int port,
 		return ret;
 
 	switch (ret) {
+	case -ETIMEDOUT:
+		return ret;
 	case -ENOSPC:
 		dev_dbg(dev->dev, "{%pM,%.4d} no space left in ARL\n",
 			addr, vid);
-- 
GitLab


From b16fc097bc283184cde40e5b30d15705e1590410 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 21 Aug 2020 15:36:42 +0200
Subject: [PATCH 0447/1341] bpf: Fix two typos in uapi/linux/bpf.h

Also remove trailing whitespaces in bpf_skb_get_tunnel_key example code.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200821133642.18870-1-tklauser@distanz.ch
---
 include/uapi/linux/bpf.h       | 10 +++++-----
 tools/include/uapi/linux/bpf.h | 10 +++++-----
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 0480f893facd2..b6238b2209b71 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -767,7 +767,7 @@ union bpf_attr {
  *
  * 		Also, note that **bpf_trace_printk**\ () is slow, and should
  * 		only be used for debugging purposes. For this reason, a notice
- * 		bloc (spanning several lines) is printed to kernel logs and
+ * 		block (spanning several lines) is printed to kernel logs and
  * 		states that the helper should not be used "for production use"
  * 		the first time this helper is used (or more precisely, when
  * 		**trace_printk**\ () buffers are allocated). For passing values
@@ -1033,14 +1033,14 @@ union bpf_attr {
  *
  * 			int ret;
  * 			struct bpf_tunnel_key key = {};
- * 			
+ *
  * 			ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);
  * 			if (ret < 0)
  * 				return TC_ACT_SHOT;	// drop packet
- * 			
+ *
  * 			if (key.remote_ipv4 != 0x0a000001)
  * 				return TC_ACT_SHOT;	// drop packet
- * 			
+ *
  * 			return TC_ACT_OK;		// accept packet
  *
  * 		This interface can also be used with all encapsulation devices
@@ -1147,7 +1147,7 @@ union bpf_attr {
  * 	Description
  * 		Retrieve the realm or the route, that is to say the
  * 		**tclassid** field of the destination for the *skb*. The
- * 		indentifier retrieved is a user-provided tag, similar to the
+ * 		identifier retrieved is a user-provided tag, similar to the
  * 		one used with the net_cls cgroup (see description for
  * 		**bpf_get_cgroup_classid**\ () helper), but here this tag is
  * 		held by a route (a destination entry), not by a task.
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 0480f893facd2..b6238b2209b71 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -767,7 +767,7 @@ union bpf_attr {
  *
  * 		Also, note that **bpf_trace_printk**\ () is slow, and should
  * 		only be used for debugging purposes. For this reason, a notice
- * 		bloc (spanning several lines) is printed to kernel logs and
+ * 		block (spanning several lines) is printed to kernel logs and
  * 		states that the helper should not be used "for production use"
  * 		the first time this helper is used (or more precisely, when
  * 		**trace_printk**\ () buffers are allocated). For passing values
@@ -1033,14 +1033,14 @@ union bpf_attr {
  *
  * 			int ret;
  * 			struct bpf_tunnel_key key = {};
- * 			
+ *
  * 			ret = bpf_skb_get_tunnel_key(skb, &key, sizeof(key), 0);
  * 			if (ret < 0)
  * 				return TC_ACT_SHOT;	// drop packet
- * 			
+ *
  * 			if (key.remote_ipv4 != 0x0a000001)
  * 				return TC_ACT_SHOT;	// drop packet
- * 			
+ *
  * 			return TC_ACT_OK;		// accept packet
  *
  * 		This interface can also be used with all encapsulation devices
@@ -1147,7 +1147,7 @@ union bpf_attr {
  * 	Description
  * 		Retrieve the realm or the route, that is to say the
  * 		**tclassid** field of the destination for the *skb*. The
- * 		indentifier retrieved is a user-provided tag, similar to the
+ * 		identifier retrieved is a user-provided tag, similar to the
  * 		one used with the net_cls cgroup (see description for
  * 		**bpf_get_cgroup_classid**\ () helper), but here this tag is
  * 		held by a route (a destination entry), not by a task.
-- 
GitLab


From a326462cba6ae7398a5c997dddf3bea39555a825 Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Wed, 19 Aug 2020 11:58:16 -0600
Subject: [PATCH 0448/1341] dt-bindings: PCI: intel,lgm-pcie: Fix matching on
 all snps,dw-pcie instances

The intel,lgm-pcie binding is matching on all snps,dw-pcie instances
which is wrong. Add a custom 'select' entry to fix this.

Fixes: e54ea45a4955 ("dt-bindings: PCI: intel: Add YAML schemas for the PCIe RC controller")
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: linux-pci@vger.kernel.org
Reviewed-by: Dilip Kota <eswara.kota@linux.intel.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml b/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
index 64b2c64ca8065..a1e2be737eec9 100644
--- a/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
+++ b/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
@@ -9,6 +9,14 @@ title: PCIe RC controller on Intel Gateway SoCs
 maintainers:
   - Dilip Kota <eswara.kota@linux.intel.com>
 
+select:
+  properties:
+    compatible:
+      contains:
+        const: intel,lgm-pcie
+  required:
+    - compatible
+
 properties:
   compatible:
     items:
-- 
GitLab


From 5f53584ce9c0cd9c92fb04717bb45bcd5719feaa Mon Sep 17 00:00:00 2001
From: Madalin Bucur <madalin.bucur@oss.nxp.com>
Date: Thu, 20 Aug 2020 13:02:04 +0300
Subject: [PATCH 0449/1341] dt-bindings: net: correct description of
 phy-connection-type

The phy-connection-type parameter is described in ePAPR 1.1:

Specifies interface type between the Ethernet device and a physical
layer (PHY) device. The value of this property is specific to the
implementation.

Signed-off-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Link: https://lore.kernel.org/r/1597917724-11127-1-git-send-email-madalin.bucur@oss.nxp.com
Signed-off-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/net/ethernet-controller.yaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/ethernet-controller.yaml b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
index 1c4474036d46a..fa2baca8c7262 100644
--- a/Documentation/devicetree/bindings/net/ethernet-controller.yaml
+++ b/Documentation/devicetree/bindings/net/ethernet-controller.yaml
@@ -54,7 +54,8 @@ properties:
 
   phy-connection-type:
     description:
-      Operation mode of the PHY interface
+      Specifies interface type between the Ethernet device and a physical
+      layer (PHY) device.
     enum:
       # There is not a standard bus between the MAC and the PHY,
       # something proprietary is being used to embed the PHY in the
-- 
GitLab


From fdfe7cbd58806522e799e2a50a15aee7f2cbb7b6 Mon Sep 17 00:00:00 2001
From: Will Deacon <will@kernel.org>
Date: Tue, 11 Aug 2020 11:27:24 +0100
Subject: [PATCH 0450/1341] KVM: Pass MMU notifier range flags to
 kvm_unmap_hva_range()

The 'flags' field of 'struct mmu_notifier_range' is used to indicate
whether invalidate_range_{start,end}() are permitted to block. In the
case of kvm_mmu_notifier_invalidate_range_start(), this field is not
forwarded on to the architecture-specific implementation of
kvm_unmap_hva_range() and therefore the backend cannot sensibly decide
whether or not to block.

Add an extra 'flags' parameter to kvm_unmap_hva_range() so that
architectures are aware as to whether or not they are permitted to block.

Cc: <stable@vger.kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Message-Id: <20200811102725.7121-2-will@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/arm64/include/asm/kvm_host.h   | 2 +-
 arch/arm64/kvm/mmu.c                | 2 +-
 arch/mips/include/asm/kvm_host.h    | 2 +-
 arch/mips/kvm/mmu.c                 | 3 ++-
 arch/powerpc/include/asm/kvm_host.h | 3 ++-
 arch/powerpc/kvm/book3s.c           | 3 ++-
 arch/powerpc/kvm/e500_mmu_host.c    | 3 ++-
 arch/x86/include/asm/kvm_host.h     | 3 ++-
 arch/x86/kvm/mmu/mmu.c              | 3 ++-
 virt/kvm/kvm_main.c                 | 3 ++-
 10 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 65568b23868a1..e52c927aade53 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -473,7 +473,7 @@ int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
 
 #define KVM_ARCH_WANT_MMU_NOTIFIER
 int kvm_unmap_hva_range(struct kvm *kvm,
-			unsigned long start, unsigned long end);
+			unsigned long start, unsigned long end, unsigned flags);
 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 0121ef2c7c8d2..dc351802ff18d 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -2213,7 +2213,7 @@ static int kvm_unmap_hva_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *dat
 }
 
 int kvm_unmap_hva_range(struct kvm *kvm,
-			unsigned long start, unsigned long end)
+			unsigned long start, unsigned long end, unsigned flags)
 {
 	if (!kvm->arch.mmu.pgd)
 		return 0;
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index d35eaed1668f1..825d337a505ae 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -969,7 +969,7 @@ enum kvm_mips_fault_result kvm_trap_emul_gva_fault(struct kvm_vcpu *vcpu,
 
 #define KVM_ARCH_WANT_MMU_NOTIFIER
 int kvm_unmap_hva_range(struct kvm *kvm,
-			unsigned long start, unsigned long end);
+			unsigned long start, unsigned long end, unsigned flags);
 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c
index 87fa8d8a10310..28c366d307e70 100644
--- a/arch/mips/kvm/mmu.c
+++ b/arch/mips/kvm/mmu.c
@@ -486,7 +486,8 @@ static int kvm_unmap_hva_handler(struct kvm *kvm, gfn_t gfn, gfn_t gfn_end,
 	return 1;
 }
 
-int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
+int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end,
+			unsigned flags)
 {
 	handle_hva_to_gpa(kvm, start, end, &kvm_unmap_hva_handler, NULL);
 
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index e020d269416d6..10ded83414dea 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -58,7 +58,8 @@
 #define KVM_ARCH_WANT_MMU_NOTIFIER
 
 extern int kvm_unmap_hva_range(struct kvm *kvm,
-			       unsigned long start, unsigned long end);
+			       unsigned long start, unsigned long end,
+			       unsigned flags);
 extern int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 extern int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 41fedec69ac35..49db50d1db04c 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -834,7 +834,8 @@ void kvmppc_core_commit_memory_region(struct kvm *kvm,
 	kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new, change);
 }
 
-int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
+int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end,
+			unsigned flags)
 {
 	return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 }
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c
index d6c1069e9954a..ed0c9c43d0cf1 100644
--- a/arch/powerpc/kvm/e500_mmu_host.c
+++ b/arch/powerpc/kvm/e500_mmu_host.c
@@ -734,7 +734,8 @@ static int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
 	return 0;
 }
 
-int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
+int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end,
+			unsigned flags)
 {
 	/* kvm_unmap_hva flushes everything anyways */
 	kvm_unmap_hva(kvm, start);
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 5ab3af7275d81..5303dbc5c9bce 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1596,7 +1596,8 @@ asmlinkage void kvm_spurious_fault(void);
 	_ASM_EXTABLE(666b, 667b)
 
 #define KVM_ARCH_WANT_MMU_NOTIFIER
-int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end);
+int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end,
+			unsigned flags);
 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 4e03841f053de..a5d0207e71897 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -1916,7 +1916,8 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
 	return kvm_handle_hva_range(kvm, hva, hva + 1, data, handler);
 }
 
-int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
+int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end,
+			unsigned flags)
 {
 	return kvm_handle_hva_range(kvm, start, end, 0, kvm_unmap_rmapp);
 }
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2c2c0254c2d8d..4eaa4e46c7d07 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -482,7 +482,8 @@ static int kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn,
 	 * count is also read inside the mmu_lock critical section.
 	 */
 	kvm->mmu_notifier_count++;
-	need_tlb_flush = kvm_unmap_hva_range(kvm, range->start, range->end);
+	need_tlb_flush = kvm_unmap_hva_range(kvm, range->start, range->end,
+					     range->flags);
 	need_tlb_flush |= kvm->tlbs_dirty;
 	/* we've to flush the tlb before the pages can be freed */
 	if (need_tlb_flush)
-- 
GitLab


From b5331379bc62611d1026173a09c73573384201d9 Mon Sep 17 00:00:00 2001
From: Will Deacon <will@kernel.org>
Date: Tue, 11 Aug 2020 11:27:25 +0100
Subject: [PATCH 0451/1341] KVM: arm64: Only reschedule if
 MMU_NOTIFIER_RANGE_BLOCKABLE is not set

When an MMU notifier call results in unmapping a range that spans multiple
PGDs, we end up calling into cond_resched_lock() when crossing a PGD boundary,
since this avoids running into RCU stalls during VM teardown. Unfortunately,
if the VM is destroyed as a result of OOM, then blocking is not permitted
and the call to the scheduler triggers the following BUG():

 | BUG: sleeping function called from invalid context at arch/arm64/kvm/mmu.c:394
 | in_atomic(): 1, irqs_disabled(): 0, non_block: 1, pid: 36, name: oom_reaper
 | INFO: lockdep is turned off.
 | CPU: 3 PID: 36 Comm: oom_reaper Not tainted 5.8.0 #1
 | Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015
 | Call trace:
 |  dump_backtrace+0x0/0x284
 |  show_stack+0x1c/0x28
 |  dump_stack+0xf0/0x1a4
 |  ___might_sleep+0x2bc/0x2cc
 |  unmap_stage2_range+0x160/0x1ac
 |  kvm_unmap_hva_range+0x1a0/0x1c8
 |  kvm_mmu_notifier_invalidate_range_start+0x8c/0xf8
 |  __mmu_notifier_invalidate_range_start+0x218/0x31c
 |  mmu_notifier_invalidate_range_start_nonblock+0x78/0xb0
 |  __oom_reap_task_mm+0x128/0x268
 |  oom_reap_task+0xac/0x298
 |  oom_reaper+0x178/0x17c
 |  kthread+0x1e4/0x1fc
 |  ret_from_fork+0x10/0x30

Use the new 'flags' argument to kvm_unmap_hva_range() to ensure that we
only reschedule if MMU_NOTIFIER_RANGE_BLOCKABLE is set in the notifier
flags.

Cc: <stable@vger.kernel.org>
Fixes: 8b3405e345b5 ("kvm: arm/arm64: Fix locking for kvm_free_stage2_pgd")
Cc: Marc Zyngier <maz@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Message-Id: <20200811102725.7121-3-will@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/arm64/kvm/mmu.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index dc351802ff18d..ba00bcc0c8846 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -343,7 +343,8 @@ static void unmap_stage2_p4ds(struct kvm_s2_mmu *mmu, pgd_t *pgd,
  * destroying the VM), otherwise another faulting VCPU may come in and mess
  * with things behind our backs.
  */
-static void unmap_stage2_range(struct kvm_s2_mmu *mmu, phys_addr_t start, u64 size)
+static void __unmap_stage2_range(struct kvm_s2_mmu *mmu, phys_addr_t start, u64 size,
+				 bool may_block)
 {
 	struct kvm *kvm = mmu->kvm;
 	pgd_t *pgd;
@@ -369,11 +370,16 @@ static void unmap_stage2_range(struct kvm_s2_mmu *mmu, phys_addr_t start, u64 si
 		 * If the range is too large, release the kvm->mmu_lock
 		 * to prevent starvation and lockup detector warnings.
 		 */
-		if (next != end)
+		if (may_block && next != end)
 			cond_resched_lock(&kvm->mmu_lock);
 	} while (pgd++, addr = next, addr != end);
 }
 
+static void unmap_stage2_range(struct kvm_s2_mmu *mmu, phys_addr_t start, u64 size)
+{
+	__unmap_stage2_range(mmu, start, size, true);
+}
+
 static void stage2_flush_ptes(struct kvm_s2_mmu *mmu, pmd_t *pmd,
 			      phys_addr_t addr, phys_addr_t end)
 {
@@ -2208,7 +2214,10 @@ static int handle_hva_to_gpa(struct kvm *kvm,
 
 static int kvm_unmap_hva_handler(struct kvm *kvm, gpa_t gpa, u64 size, void *data)
 {
-	unmap_stage2_range(&kvm->arch.mmu, gpa, size);
+	unsigned flags = *(unsigned *)data;
+	bool may_block = flags & MMU_NOTIFIER_RANGE_BLOCKABLE;
+
+	__unmap_stage2_range(&kvm->arch.mmu, gpa, size, may_block);
 	return 0;
 }
 
@@ -2219,7 +2228,7 @@ int kvm_unmap_hva_range(struct kvm *kvm,
 		return 0;
 
 	trace_kvm_unmap_hva_range(start, end);
-	handle_hva_to_gpa(kvm, start, end, &kvm_unmap_hva_handler, NULL);
+	handle_hva_to_gpa(kvm, start, end, &kvm_unmap_hva_handler, &flags);
 	return 0;
 }
 
-- 
GitLab


From 5cd841d2676a702e5f79a8bacbfbae3bfc2411f7 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Wed, 19 Aug 2020 11:20:58 +0200
Subject: [PATCH 0452/1341] dt-bindings: vendor-prefixes: Remove trailing
 whitespace

Fixes: f516fb704d02fff2 ("dt-bindings: Whitespace clean-ups in schema files")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200819092058.1526-1-geert+renesas@glider.be
Signed-off-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 2baee2c817c1a..63996ab035217 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -993,7 +993,7 @@ patternProperties:
   "^sst,.*":
     description: Silicon Storage Technology, Inc.
   "^sstar,.*":
-    description: Xiamen Xingchen(SigmaStar) Technology Co., Ltd. 
+    description: Xiamen Xingchen(SigmaStar) Technology Co., Ltd.
       (formerly part of MStar Semiconductor, Inc.)
   "^st,.*":
     description: STMicroelectronics
-- 
GitLab


From 17bc10300c69bd51b82983cdadafa0a7791f074e Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <natechancellor@gmail.com>
Date: Mon, 17 Aug 2020 23:49:25 -0700
Subject: [PATCH 0453/1341] block/rnbd: Ensure err is always initialized in
 process_rdma

Clang warns:

drivers/block/rnbd/rnbd-srv.c:150:6: warning: variable 'err' is used
uninitialized whenever 'if' condition is true
[-Wsometimes-uninitialized]
        if (IS_ERR(bio)) {
            ^~~~~~~~~~~
drivers/block/rnbd/rnbd-srv.c:177:9: note: uninitialized use occurs here
        return err;
               ^~~
drivers/block/rnbd/rnbd-srv.c:150:2: note: remove the 'if' if its
condition is always false
        if (IS_ERR(bio)) {
        ^~~~~~~~~~~~~~~~~~
drivers/block/rnbd/rnbd-srv.c:126:9: note: initialize the variable 'err'
to silence this warning
        int err;
               ^
                = 0
1 warning generated.

err is indeed uninitialized when this statement is taken. Ensure that it
is assigned the error value of bio before jumping to the error handling
label.

Fixes: 735d77d4fd28 ("rnbd: remove rnbd_dev_submit_io")
Reported-by: Brooke Basile <brookebasile@gmail.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/1134
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/rnbd/rnbd-srv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/block/rnbd/rnbd-srv.c b/drivers/block/rnbd/rnbd-srv.c
index 0fb94843a495f..e1bc8b4cd5929 100644
--- a/drivers/block/rnbd/rnbd-srv.c
+++ b/drivers/block/rnbd/rnbd-srv.c
@@ -148,7 +148,8 @@ static int process_rdma(struct rtrs_srv *sess,
 	/* Generate bio with pages pointing to the rdma buffer */
 	bio = rnbd_bio_map_kern(data, sess_dev->rnbd_dev->ibd_bio_set, datalen, GFP_KERNEL);
 	if (IS_ERR(bio)) {
-		rnbd_srv_err(sess_dev, "Failed to generate bio, err: %ld\n", PTR_ERR(bio));
+		err = PTR_ERR(bio);
+		rnbd_srv_err(sess_dev, "Failed to generate bio, err: %d\n", err);
 		goto sess_dev_put;
 	}
 
-- 
GitLab


From db03f88fae8a2c8007caafa70287798817df2875 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@redhat.com>
Date: Tue, 18 Aug 2020 17:07:28 +0800
Subject: [PATCH 0454/1341] blk-mq: insert request not through ->queue_rq into
 sw/scheduler queue

c616cbee97ae ("blk-mq: punt failed direct issue to dispatch list") supposed
to add request which has been through ->queue_rq() to the hw queue dispatch
list, however it adds request running out of budget or driver tag to hw queue
too. This way basically bypasses request merge, and causes too many request
dispatched to LLD, and system% is unnecessary increased.

Fixes this issue by adding request not through ->queue_rq into sw/scheduler
queue, and this way is safe because no ->queue_rq is called on this request
yet.

High %system can be observed on Azure storvsc device, and even soft lock
is observed. This patch reduces %system during heavy sequential IO,
meantime decreases soft lockup risk.

Fixes: c616cbee97ae ("blk-mq: punt failed direct issue to dispatch list")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-mq.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index a80f4986e5949..b3d2785eefe93 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -2026,7 +2026,8 @@ static blk_status_t __blk_mq_try_issue_directly(struct blk_mq_hw_ctx *hctx,
 	if (bypass_insert)
 		return BLK_STS_RESOURCE;
 
-	blk_mq_request_bypass_insert(rq, false, run_queue);
+	blk_mq_sched_insert_request(rq, false, run_queue, false);
+
 	return BLK_STS_OK;
 }
 
-- 
GitLab


From e4b469c66f3cbb81c2e94d31123d7bcdf3c1dabd Mon Sep 17 00:00:00 2001
From: Keith Busch <kbusch@kernel.org>
Date: Thu, 6 Aug 2020 14:58:37 -0700
Subject: [PATCH 0455/1341] block: fix get_max_io_size()

A previous commit aligning splits to physical block sizes inadvertently
modified one return case such that that it now returns 0 length splits
when the number of sectors doesn't exceed the physical offset. This
later hits a BUG in bio_split(). Restore the previous working behavior.

Fixes: 9cc5169cd478b ("block: Improve physical block alignment of split bios")
Reported-by: Eric Deal <eric.deal@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Cc: Bart Van Assche <bvanassche@acm.org>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-merge.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 7af1f3668a918..f685d633bcc9b 100644
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -154,7 +154,7 @@ static inline unsigned get_max_io_size(struct request_queue *q,
 	if (max_sectors > start_offset)
 		return max_sectors - start_offset;
 
-	return sectors & (lbs - 1);
+	return sectors & ~(lbs - 1);
 }
 
 static inline unsigned get_max_segment_size(const struct request_queue *q,
-- 
GitLab


From 0c8b9c3540bddd143091045c99b00d43393c8d62 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Wed, 19 Aug 2020 14:32:43 +0200
Subject: [PATCH 0456/1341] MAINTAINERS: Add missing header files to BLOCK
 LAYER section

The various <linux/blk*.h> header files are part of the Block Layer.
Add them to the corresponding section in the MAINTAINERS file, so
scripts/get_maintainer.pl will pick them up.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index deaafb617361c..bfa6800346dc3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3205,6 +3205,7 @@ S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git
 F:	block/
 F:	drivers/block/
+F:	include/linux/blk*
 F:	kernel/trace/blktrace.c
 F:	lib/sbitmap.c
 
-- 
GitLab


From 27029b4b18aa5d3b060f0bf2c26dae254132cfce Mon Sep 17 00:00:00 2001
From: Yufen Yu <yuyufen@huawei.com>
Date: Mon, 10 Aug 2020 22:21:16 -0400
Subject: [PATCH 0457/1341] blkcg: fix memleak for iolatency

Normally, blkcg_iolatency_exit() will free related memory in iolatency
when cleanup queue. But if blk_throtl_init() return error and queue init
fail, blkcg_iolatency_exit() will not do that for us. Then it cause
memory leak.

Fixes: d70675121546 ("block: introduce blk-iolatency io controller")
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-cgroup.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 619a79b51068c..c195365c98172 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1152,13 +1152,15 @@ int blkcg_init_queue(struct request_queue *q)
 	if (preloaded)
 		radix_tree_preload_end();
 
-	ret = blk_iolatency_init(q);
+	ret = blk_throtl_init(q);
 	if (ret)
 		goto err_destroy_all;
 
-	ret = blk_throtl_init(q);
-	if (ret)
+	ret = blk_iolatency_init(q);
+	if (ret) {
+		blk_throtl_exit(q);
 		goto err_destroy_all;
+	}
 	return 0;
 
 err_destroy_all:
-- 
GitLab


From 382fee1a8b623e2546a3e15e80517389e0e0673e Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Thu, 30 Jul 2020 11:51:00 -0700
Subject: [PATCH 0458/1341] nvmet: fix a memory leak

We forgot to free new_model_number

Fixes: 013b7ebe5a0d ("nvmet: make ctrl model configurable")
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/target/configfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/target/configfs.c b/drivers/nvme/target/configfs.c
index 74b2b61c773bb..37e1d7784e175 100644
--- a/drivers/nvme/target/configfs.c
+++ b/drivers/nvme/target/configfs.c
@@ -1136,6 +1136,7 @@ static ssize_t nvmet_subsys_attr_model_store(struct config_item *item,
 	up_write(&nvmet_config_sem);
 
 	kfree_rcu(new_model, rcuhead);
+	kfree(new_model_number);
 
 	return count;
 }
-- 
GitLab


From 0ceeab96ba598c578f0e87cb25b79349cd35b8f1 Mon Sep 17 00:00:00 2001
From: Logan Gunthorpe <logang@deltatee.com>
Date: Wed, 29 Jul 2020 13:10:09 -0600
Subject: [PATCH 0459/1341] nvmet-passthru: Reject commands with non-sgl flags
 set

Any command with a non-SGL flag set (like fuse flags) should be
rejected.

Fixes: c1fef73f793b ("nvmet: add passthru code to process commands")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/target/passthru.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c
index 89d91dc999a6d..f69c3ac82e58c 100644
--- a/drivers/nvme/target/passthru.c
+++ b/drivers/nvme/target/passthru.c
@@ -326,6 +326,10 @@ static u16 nvmet_setup_passthru_command(struct nvmet_req *req)
 
 u16 nvmet_parse_passthru_io_cmd(struct nvmet_req *req)
 {
+	/* Reject any commands with non-sgl flags set (ie. fused commands) */
+	if (req->cmd->common.flags & ~NVME_CMD_SGL_ALL)
+		return NVME_SC_INVALID_FIELD;
+
 	switch (req->cmd->common.opcode) {
 	case nvme_cmd_resv_register:
 	case nvme_cmd_resv_report:
@@ -396,6 +400,10 @@ static u16 nvmet_passthru_get_set_features(struct nvmet_req *req)
 
 u16 nvmet_parse_passthru_admin_cmd(struct nvmet_req *req)
 {
+	/* Reject any commands with non-sgl flags set (ie. fused commands) */
+	if (req->cmd->common.flags & ~NVME_CMD_SGL_ALL)
+		return NVME_SC_INVALID_FIELD;
+
 	/*
 	 * Passthru all vendor specific commands
 	 */
-- 
GitLab


From f34448cd0dc697723fb5f4118f8431d9233b370d Mon Sep 17 00:00:00 2001
From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Date: Sun, 2 Aug 2020 19:15:45 +0800
Subject: [PATCH 0460/1341] nvme-fc: Fix wrong return value in
 __nvme_fc_init_request()

On an error exit path, a negative error code should be returned
instead of a positive return value.

Fixes: e399441de9115 ("nvme-fabrics: Add host support for FC transport")
Cc: James Smart <jsmart2021@gmail.com>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/fc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index eae43bb444e03..07aacfe46368e 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2078,7 +2078,7 @@ __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl,
 	if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.cmddma)) {
 		dev_err(ctrl->dev,
 			"FCP Op failed - cmdiu dma mapping failed.\n");
-		ret = EFAULT;
+		ret = -EFAULT;
 		goto out_on_error;
 	}
 
@@ -2088,7 +2088,7 @@ __nvme_fc_init_request(struct nvme_fc_ctrl *ctrl,
 	if (fc_dma_mapping_error(ctrl->lport->dev, op->fcp_req.rspdma)) {
 		dev_err(ctrl->dev,
 			"FCP Op failed - rspiu dma mapping failed.\n");
-		ret = EFAULT;
+		ret = -EFAULT;
 	}
 
 	atomic_set(&op->state, FCPOP_STATE_IDLE);
-- 
GitLab


From 93eb0381e13d249a18ed4aae203291ff977e7ffb Mon Sep 17 00:00:00 2001
From: Martin Wilck <mwilck@suse.com>
Date: Thu, 6 Aug 2020 15:19:31 +0200
Subject: [PATCH 0461/1341] nvme: multipath: round-robin: fix single
 non-optimized path case

If there's only one usable, non-optimized path, nvme_round_robin_path()
returns NULL, which is wrong. Fix it by falling back to "old", like in
the single optimized path case. Also, if the active path isn't changed,
there's no need to re-assign the pointer.

Fixes: 3f6e3246db0e ("nvme-multipath: fix logic for non-optimized paths")
Signed-off-by: Martin Wilck <mwilck@suse.com>
Signed-off-by: Martin George <marting@netapp.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/multipath.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 3ded54d2c9c6a..a64dfff0d0ceb 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -255,12 +255,17 @@ static struct nvme_ns *nvme_round_robin_path(struct nvme_ns_head *head,
 			fallback = ns;
 	}
 
-	/* No optimized path found, re-check the current path */
+	/*
+	 * The loop above skips the current path for round-robin semantics.
+	 * Fall back to the current path if either:
+	 *  - no other optimized path found and current is optimized,
+	 *  - no other usable path found and current is usable.
+	 */
 	if (!nvme_path_is_disabled(old) &&
-	    old->ana_state == NVME_ANA_OPTIMIZED) {
-		found = old;
-		goto out;
-	}
+	    (old->ana_state == NVME_ANA_OPTIMIZED ||
+	     (!fallback && old->ana_state == NVME_ANA_NONOPTIMIZED)))
+		return old;
+
 	if (!fallback)
 		return NULL;
 	found = fallback;
-- 
GitLab


From e398863b75af24103cee69cc8ee8bf4bc9c8913e Mon Sep 17 00:00:00 2001
From: Martin Wilck <mwilck@suse.com>
Date: Thu, 6 Aug 2020 15:19:32 +0200
Subject: [PATCH 0462/1341] nvme: multipath: round-robin: eliminate "fallback"
 variable

If we find an optimized path, we quit the loop immediately. Thus we can use
just one variable for the next path, slighly simplifying the code.

Signed-off-by: Martin Wilck <mwilck@suse.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/multipath.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index a64dfff0d0ceb..760f625cefc8d 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -233,7 +233,7 @@ static struct nvme_ns *nvme_next_ns(struct nvme_ns_head *head,
 static struct nvme_ns *nvme_round_robin_path(struct nvme_ns_head *head,
 		int node, struct nvme_ns *old)
 {
-	struct nvme_ns *ns, *found, *fallback = NULL;
+	struct nvme_ns *ns, *found = NULL;
 
 	if (list_is_singular(&head->list)) {
 		if (nvme_path_is_disabled(old))
@@ -252,7 +252,7 @@ static struct nvme_ns *nvme_round_robin_path(struct nvme_ns_head *head,
 			goto out;
 		}
 		if (ns->ana_state == NVME_ANA_NONOPTIMIZED)
-			fallback = ns;
+			found = ns;
 	}
 
 	/*
@@ -263,12 +263,11 @@ static struct nvme_ns *nvme_round_robin_path(struct nvme_ns_head *head,
 	 */
 	if (!nvme_path_is_disabled(old) &&
 	    (old->ana_state == NVME_ANA_OPTIMIZED ||
-	     (!fallback && old->ana_state == NVME_ANA_NONOPTIMIZED)))
+	     (!found && old->ana_state == NVME_ANA_NONOPTIMIZED)))
 		return old;
 
-	if (!fallback)
+	if (!found)
 		return NULL;
-	found = fallback;
 out:
 	rcu_assign_pointer(head->current_path[node], found);
 	return found;
-- 
GitLab


From 4db69a3d7cfe31e0205bfcb6de331aa9a124cb10 Mon Sep 17 00:00:00 2001
From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Date: Thu, 6 Aug 2020 13:02:23 -0700
Subject: [PATCH 0463/1341] nvmet: add ns tear down label for pt-cmd handling
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In the current implementation before submitting the passthru cmd we
may come across error e.g. getting ns from passthru controller,
allocating a request from passthru controller, etc. For all the failure
cases it only uses single goto label fail_out.

In the target code, we follow the pattern to have a separate label for
each error out the case when setting up multiple things before the actual
action.

This patch follows the same pattern and renames generic fail_out label
to out_put_ns and updates the error out cases in the
nvmet_passthru_execute_cmd() where it is needed.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/target/passthru.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c
index f69c3ac82e58c..750d7b009b340 100644
--- a/drivers/nvme/target/passthru.c
+++ b/drivers/nvme/target/passthru.c
@@ -230,7 +230,7 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
 		if (unlikely(!ns)) {
 			pr_err("failed to get passthru ns nsid:%u\n", nsid);
 			status = NVME_SC_INVALID_NS | NVME_SC_DNR;
-			goto fail_out;
+			goto out;
 		}
 
 		q = ns->queue;
@@ -240,14 +240,14 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
 	if (IS_ERR(rq)) {
 		rq = NULL;
 		status = NVME_SC_INTERNAL;
-		goto fail_out;
+		goto out_put_ns;
 	}
 
 	if (req->sg_cnt) {
 		ret = nvmet_passthru_map_sg(req, rq);
 		if (unlikely(ret)) {
 			status = NVME_SC_INTERNAL;
-			goto fail_out;
+			goto out_put_ns;
 		}
 	}
 
@@ -274,9 +274,10 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
 
 	return;
 
-fail_out:
+out_put_ns:
 	if (ns)
 		nvme_put_ns(ns);
+out:
 	nvmet_req_complete(req, status);
 	blk_put_request(rq);
 }
-- 
GitLab


From a2138fd49467d0b909b9f19936974f9a3c4e3e1a Mon Sep 17 00:00:00 2001
From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Date: Thu, 6 Aug 2020 15:48:58 -0700
Subject: [PATCH 0464/1341] nvmet: fix oops in pt cmd execution

In the existing NVMeOF Passthru core command handling on failure of
nvme_alloc_request() it errors out with rq value set to NULL. In the
error handling path it calls blk_put_request() without checking if
rq is set to NULL or not which produces following Oops:-

[ 1457.346861] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 1457.347838] #PF: supervisor read access in kernel mode
[ 1457.348464] #PF: error_code(0x0000) - not-present page
[ 1457.349085] PGD 0 P4D 0
[ 1457.349402] Oops: 0000 [#1] SMP NOPTI
[ 1457.349851] CPU: 18 PID: 10782 Comm: kworker/18:2 Tainted: G           OE     5.8.0-rc4nvme-5.9+ #35
[ 1457.350951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.0-59-gc9ba5276e3214
[ 1457.352347] Workqueue: events nvme_loop_execute_work [nvme_loop]
[ 1457.353062] RIP: 0010:blk_mq_free_request+0xe/0x110
[ 1457.353651] Code: 3f ff ff ff 83 f8 01 75 0d 4c 89 e7 e8 1b db ff ff e9 2d ff ff ff 0f 0b eb ef 66 8
[ 1457.355975] RSP: 0018:ffffc900035b7de0 EFLAGS: 00010282
[ 1457.356636] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
[ 1457.357526] RDX: ffffffffa060bd05 RSI: 0000000000000000 RDI: 0000000000000000
[ 1457.358416] RBP: 0000000000000037 R08: 0000000000000000 R09: 0000000000000000
[ 1457.359317] R10: 0000000000000000 R11: 000000000000006d R12: 0000000000000000
[ 1457.360424] R13: ffff8887ffa68600 R14: 0000000000000000 R15: ffff8888150564c8
[ 1457.361322] FS:  0000000000000000(0000) GS:ffff888814600000(0000) knlGS:0000000000000000
[ 1457.362337] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1457.363058] CR2: 0000000000000000 CR3: 000000081c0ac000 CR4: 00000000003406e0
[ 1457.363973] Call Trace:
[ 1457.364296]  nvmet_passthru_execute_cmd+0x150/0x2c0 [nvmet]
[ 1457.364990]  process_one_work+0x24e/0x5a0
[ 1457.365493]  ? __schedule+0x353/0x840
[ 1457.365957]  worker_thread+0x3c/0x380
[ 1457.366426]  ? process_one_work+0x5a0/0x5a0
[ 1457.366948]  kthread+0x135/0x150
[ 1457.367362]  ? kthread_create_on_node+0x60/0x60
[ 1457.367934]  ret_from_fork+0x22/0x30
[ 1457.368388] Modules linked in: nvme_loop(OE) nvmet(OE) nvme_fabrics(OE) null_blk nvme(OE) nvme_corer
[ 1457.368414]  ata_piix crc32c_intel virtio_pci libata virtio_ring serio_raw t10_pi virtio floppy dm_]
[ 1457.380849] CR2: 0000000000000000
[ 1457.381288] ---[ end trace c6cab61bfd1f68fd ]---
[ 1457.381861] RIP: 0010:blk_mq_free_request+0xe/0x110
[ 1457.382469] Code: 3f ff ff ff 83 f8 01 75 0d 4c 89 e7 e8 1b db ff ff e9 2d ff ff ff 0f 0b eb ef 66 8
[ 1457.384749] RSP: 0018:ffffc900035b7de0 EFLAGS: 00010282
[ 1457.385393] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000002
[ 1457.386264] RDX: ffffffffa060bd05 RSI: 0000000000000000 RDI: 0000000000000000
[ 1457.387142] RBP: 0000000000000037 R08: 0000000000000000 R09: 0000000000000000
[ 1457.388029] R10: 0000000000000000 R11: 000000000000006d R12: 0000000000000000
[ 1457.388914] R13: ffff8887ffa68600 R14: 0000000000000000 R15: ffff8888150564c8
[ 1457.389798] FS:  0000000000000000(0000) GS:ffff888814600000(0000) knlGS:0000000000000000
[ 1457.390796] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 1457.391508] CR2: 0000000000000000 CR3: 000000081c0ac000 CR4: 00000000003406e0
[ 1457.392525] Kernel panic - not syncing: Fatal exception
[ 1457.394138] Kernel Offset: disabled
[ 1457.394677] ---[ end Kernel panic - not syncing: Fatal exception ]---

We fix this Oops by adding a new goto label out_put_req and reordering
the blk_put_request call to avoid calling blk_put_request() with rq
value is set to NULL. Here we also update the rest of the code
accordingly.

Fixes: 06b7164dfdc0 ("nvmet: add passthru code to process commands")
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/target/passthru.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c
index 750d7b009b340..ec223bf56254b 100644
--- a/drivers/nvme/target/passthru.c
+++ b/drivers/nvme/target/passthru.c
@@ -238,7 +238,6 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
 
 	rq = nvme_alloc_request(q, req->cmd, BLK_MQ_REQ_NOWAIT, NVME_QID_ANY);
 	if (IS_ERR(rq)) {
-		rq = NULL;
 		status = NVME_SC_INTERNAL;
 		goto out_put_ns;
 	}
@@ -247,7 +246,7 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
 		ret = nvmet_passthru_map_sg(req, rq);
 		if (unlikely(ret)) {
 			status = NVME_SC_INTERNAL;
-			goto out_put_ns;
+			goto out_put_req;
 		}
 	}
 
@@ -274,12 +273,13 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
 
 	return;
 
+out_put_req:
+	blk_put_request(rq);
 out_put_ns:
 	if (ns)
 		nvme_put_ns(ns);
 out:
 	nvmet_req_complete(req, status);
-	blk_put_request(rq);
 }
 
 /*
-- 
GitLab


From 7ee51cf60a90c2017b8d5b6e936cb52490aac7bd Mon Sep 17 00:00:00 2001
From: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Date: Thu, 6 Aug 2020 15:56:27 -0700
Subject: [PATCH 0465/1341] nvmet: call blk_mq_free_request() directly

Instead of calling blk_put_request() which calls blk_mq_free_request(),
call blk_mq_free_request() directly for NVMeOF passthru. This is to
mainly avoid an extra function call in the completion path
nvmet_passthru_req_done().

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/target/passthru.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/nvme/target/passthru.c b/drivers/nvme/target/passthru.c
index ec223bf56254b..8bd7f656e240b 100644
--- a/drivers/nvme/target/passthru.c
+++ b/drivers/nvme/target/passthru.c
@@ -165,7 +165,7 @@ static void nvmet_passthru_execute_cmd_work(struct work_struct *w)
 
 	req->cqe->result = nvme_req(rq)->result;
 	nvmet_req_complete(req, status);
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 }
 
 static void nvmet_passthru_req_done(struct request *rq,
@@ -175,7 +175,7 @@ static void nvmet_passthru_req_done(struct request *rq,
 
 	req->cqe->result = nvme_req(rq)->result;
 	nvmet_req_complete(req, nvme_req(rq)->status);
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 }
 
 static int nvmet_passthru_map_sg(struct nvmet_req *req, struct request *rq)
@@ -274,7 +274,7 @@ static void nvmet_passthru_execute_cmd(struct nvmet_req *req)
 	return;
 
 out_put_req:
-	blk_put_request(rq);
+	blk_mq_free_request(rq);
 out_put_ns:
 	if (ns)
 		nvme_put_ns(ns);
-- 
GitLab


From ecbcdf0c81265f7f780b588eed77fa933fd79f68 Mon Sep 17 00:00:00 2001
From: Logan Gunthorpe <logang@deltatee.com>
Date: Wed, 12 Aug 2020 17:24:44 -0600
Subject: [PATCH 0466/1341] nvme: Use spin_lock_irq() when taking the
 ctrl->lock

When locking the ctrl->lock spinlock IRQs need to be disabled to avoid a
dead lock. The new spin_lock() calls recently added produce the
following lockdep warning when running the blktest nvme/003:

    ================================
    WARNING: inconsistent lock state
    --------------------------------
    inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
    ksoftirqd/2/22 [HC0[0]:SC1[1]:HE0:SE0] takes:
    ffff888276a8c4c0 (&ctrl->lock){+.?.}-{2:2}, at: nvme_keep_alive_end_io+0x50/0xc0
    {SOFTIRQ-ON-W} state was registered at:
      lock_acquire+0x164/0x500
      _raw_spin_lock+0x28/0x40
      nvme_get_effects_log+0x37/0x1c0
      nvme_init_identify+0x9e4/0x14f0
      nvme_reset_work+0xadd/0x2360
      process_one_work+0x66b/0xb70
      worker_thread+0x6e/0x6c0
      kthread+0x1e7/0x210
      ret_from_fork+0x22/0x30
    irq event stamp: 1449221
    hardirqs last  enabled at (1449220): [<ffffffff81c58e69>] ktime_get+0xf9/0x140
    hardirqs last disabled at (1449221): [<ffffffff83129665>] _raw_spin_lock_irqsave+0x25/0x60
    softirqs last  enabled at (1449210): [<ffffffff83400447>] __do_softirq+0x447/0x595
    softirqs last disabled at (1449215): [<ffffffff81b489b5>] run_ksoftirqd+0x35/0x50

    other info that might help us debug this:
     Possible unsafe locking scenario:

           CPU0
           ----
      lock(&ctrl->lock);
      <Interrupt>
        lock(&ctrl->lock);

     *** DEADLOCK ***

    no locks held by ksoftirqd/2/22.

    stack backtrace:
    CPU: 2 PID: 22 Comm: ksoftirqd/2 Not tainted 5.8.0-rc4-eid-vmlocalyes-dbg-00157-g7236657c6b3a #1450
    Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.12.0-1 04/01/2014
    Call Trace:
     dump_stack+0xc8/0x11a
     print_usage_bug.cold.63+0x235/0x23e
     mark_lock+0xa9c/0xcf0
     __lock_acquire+0xd9a/0x2b50
     lock_acquire+0x164/0x500
     _raw_spin_lock_irqsave+0x40/0x60
     nvme_keep_alive_end_io+0x50/0xc0
     blk_mq_end_request+0x158/0x210
     nvme_complete_rq+0x146/0x500
     nvme_loop_complete_rq+0x26/0x30 [nvme_loop]
     blk_done_softirq+0x187/0x1e0
     __do_softirq+0x118/0x595
     run_ksoftirqd+0x35/0x50
     smpboot_thread_fn+0x1d3/0x310
     kthread+0x1e7/0x210
     ret_from_fork+0x22/0x30

Fixes: be93e87e7802 ("nvme: support for multiple Command Sets Supported and Effects log pages")
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Tested-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 88cff309d8e4f..466c591c05e93 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2965,14 +2965,14 @@ static struct nvme_cel *nvme_find_cel(struct nvme_ctrl *ctrl, u8 csi)
 {
 	struct nvme_cel *cel, *ret = NULL;
 
-	spin_lock(&ctrl->lock);
+	spin_lock_irq(&ctrl->lock);
 	list_for_each_entry(cel, &ctrl->cels, entry) {
 		if (cel->csi == csi) {
 			ret = cel;
 			break;
 		}
 	}
-	spin_unlock(&ctrl->lock);
+	spin_unlock_irq(&ctrl->lock);
 
 	return ret;
 }
@@ -2999,9 +2999,9 @@ static int nvme_get_effects_log(struct nvme_ctrl *ctrl, u8 csi,
 
 	cel->csi = csi;
 
-	spin_lock(&ctrl->lock);
+	spin_lock_irq(&ctrl->lock);
 	list_add_tail(&cel->entry, &ctrl->cels);
-	spin_unlock(&ctrl->lock);
+	spin_unlock_irq(&ctrl->lock);
 out:
 	*log = &cel->log;
 	return 0;
-- 
GitLab


From 7442ddcedc344b6fa073692f165dffdd1889e780 Mon Sep 17 00:00:00 2001
From: John Garry <john.garry@huawei.com>
Date: Fri, 14 Aug 2020 23:34:25 +0800
Subject: [PATCH 0467/1341] nvme-pci: Use u32 for nvme_dev.q_depth and
 nvme_queue.q_depth

Recently nvme_dev.q_depth was changed from an int to u16 type.

This falls over for the queue depth calculation in nvme_pci_enable(),
where NVME_CAP_MQES(dev->ctrl.cap) + 1 may overflow as a u16, as
NVME_CAP_MQES() is a 16b number also. That happens for me, and this is the
result:

root@ubuntu:/home/john# [148.272996] Unable to handle kernel NULL pointer
dereference at virtual address 0000000000000010
Mem abort info:
ESR = 0x96000004
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
Data abort info:
ISV = 0, ISS = 0x00000004
CM = 0, WnR = 0
user pgtable: 4k pages, 48-bit VAs, pgdp=00000a27bf3c9000
[0000000000000010] pgd=0000000000000000, p4d=0000000000000000
Internal error: Oops: 96000004 [#1] PREEMPT SMP
Modules linked in: nvme nvme_core
CPU: 56 PID: 256 Comm: kworker/u195:0 Not tainted
5.8.0-next-20200812 #27
Hardware name: Huawei D06 /D06, BIOS Hisilicon D06 UEFI RC0 -
V1.16.01 03/15/2019
Workqueue: nvme-reset-wq nvme_reset_work [nvme]
pstate: 80c00009 (Nzcv daif +PAN +UAO BTYPE=--)
pc : __sg_alloc_table_from_pages+0xec/0x238
lr : __sg_alloc_table_from_pages+0xc8/0x238
sp : ffff800013ccbad0
x29: ffff800013ccbad0 x28: ffff0a27b3d380a8
x27: 0000000000000000 x26: 0000000000002dc2
x25: 0000000000000dc0 x24: 0000000000000000
x23: 0000000000000000 x22: ffff800013ccbbe8
x21: 0000000000000010 x20: 0000000000000000
x19: 00000000fffff000 x18: ffffffffffffffff
x17: 00000000000000c0 x16: fffffe289eaf6380
x15: ffff800011b59948 x14: ffff002bc8fe98f8
x13: ff00000000000000 x12: ffff8000114ca000
x11: 0000000000000000 x10: ffffffffffffffff
x9 : ffffffffffffffc0 x8 : ffff0a27b5f9b6a0
x7 : 0000000000000000 x6 : 0000000000000001
x5 : ffff0a27b5f9b680 x4 : 0000000000000000
x3 : ffff0a27b5f9b680 x2 : 0000000000000000
 x1 : 0000000000000001 x0 : 0000000000000000
 Call trace:
__sg_alloc_table_from_pages+0xec/0x238
sg_alloc_table_from_pages+0x18/0x28
iommu_dma_alloc+0x474/0x678
dma_alloc_attrs+0xd8/0xf0
nvme_alloc_queue+0x114/0x160 [nvme]
nvme_reset_work+0xb34/0x14b4 [nvme]
process_one_work+0x1e8/0x360
worker_thread+0x44/0x478
kthread+0x150/0x158
ret_from_fork+0x10/0x34
 Code: f94002c3 6b01017f 540007c2 11000486 (f8645aa5)
---[ end trace 89bb2b72d59bf925 ]---

Fix by making onto a u32.

Also use u32 for nvme_dev.q_depth, as we assign this value from
nvme_dev.q_depth, and nvme_dev.q_depth will possibly hold 65536 - this
avoids the same crash as above.

Fixes: 61f3b8963097 ("nvme-pci: use unsigned for io queue depth")
Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/pci.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index ba725ae47305e..1cb09a187ae7a 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -120,7 +120,7 @@ struct nvme_dev {
 	unsigned max_qid;
 	unsigned io_queues[HCTX_MAX_TYPES];
 	unsigned int num_vecs;
-	u16 q_depth;
+	u32 q_depth;
 	int io_sqes;
 	u32 db_stride;
 	void __iomem *bar;
@@ -157,13 +157,13 @@ struct nvme_dev {
 static int io_queue_depth_set(const char *val, const struct kernel_param *kp)
 {
 	int ret;
-	u16 n;
+	u32 n;
 
-	ret = kstrtou16(val, 10, &n);
+	ret = kstrtou32(val, 10, &n);
 	if (ret != 0 || n < 2)
 		return -EINVAL;
 
-	return param_set_ushort(val, kp);
+	return param_set_uint(val, kp);
 }
 
 static inline unsigned int sq_idx(unsigned int qid, u32 stride)
@@ -195,7 +195,7 @@ struct nvme_queue {
 	dma_addr_t sq_dma_addr;
 	dma_addr_t cq_dma_addr;
 	u32 __iomem *q_db;
-	u16 q_depth;
+	u32 q_depth;
 	u16 cq_vector;
 	u16 sq_tail;
 	u16 cq_head;
@@ -2320,7 +2320,7 @@ static int nvme_pci_enable(struct nvme_dev *dev)
 
 	dev->ctrl.cap = lo_hi_readq(dev->bar + NVME_REG_CAP);
 
-	dev->q_depth = min_t(u16, NVME_CAP_MQES(dev->ctrl.cap) + 1,
+	dev->q_depth = min_t(u32, NVME_CAP_MQES(dev->ctrl.cap) + 1,
 				io_queue_depth);
 	dev->ctrl.sqsize = dev->q_depth - 1; /* 0's based queue depth */
 	dev->db_stride = 1 << NVME_CAP_STRIDE(dev->ctrl.cap);
-- 
GitLab


From c61b82c7b71343c6aca6bb6cc3ff44fb123fb5d3 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 18 Aug 2020 19:51:59 +0200
Subject: [PATCH 0468/1341] nvme-pci: fix PRP pool size

All operations are based on the controller, not the host page size.
Switch the dma pool to use the controller page size as well to avoid
massive overallocations on large page size systems.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/pci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 1cb09a187ae7a..e001a4ae65b06 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2460,7 +2460,8 @@ static int nvme_disable_prepare_reset(struct nvme_dev *dev, bool shutdown)
 static int nvme_setup_prp_pools(struct nvme_dev *dev)
 {
 	dev->prp_page_pool = dma_pool_create("prp list page", dev->dev,
-						PAGE_SIZE, PAGE_SIZE, 0);
+						NVME_CTRL_PAGE_SIZE,
+						NVME_CTRL_PAGE_SIZE, 0);
 	if (!dev->prp_page_pool)
 		return -ENOMEM;
 
-- 
GitLab


From c41ad98bebb8f4f0335b3c50dbb7583a6149dce4 Mon Sep 17 00:00:00 2001
From: Keith Busch <kbusch@kernel.org>
Date: Fri, 7 Aug 2020 09:32:35 -0700
Subject: [PATCH 0469/1341] nvme: skip noiob for zoned devices

Zoned block devices reuse the chunk_sectors queue limit to define zone
boundaries. If a such a device happens to also report an optimal
boundary, do not use that to define the chunk_sectors as that may
intermittently interfere with io splitting and zone size queries.

Signed-off-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 466c591c05e93..6c0d175f2ffa2 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2075,7 +2075,7 @@ static int __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
 		}
 	}
 
-	if (iob)
+	if (iob && !blk_queue_is_zoned(ns->queue))
 		blk_queue_chunk_sectors(ns->queue, rounddown_pow_of_two(iob));
 	nvme_update_disk_info(disk, ns, id);
 #ifdef CONFIG_NVME_MULTIPATH
-- 
GitLab


From 2eb81a3364eada43985efc0641490b73af78d0fa Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 18 Aug 2020 09:11:29 +0200
Subject: [PATCH 0470/1341] nvme: rename and document nvme_end_request

nvme_end_request is a bit misnamed, as it wraps around the
blk_mq_complete_* API.  It's semantics also are non-trivial, so give it
a more descriptive name and add a comment explaining the semantics.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 Documentation/fault-injection/nvme-fault-injection.rst | 2 +-
 drivers/nvme/host/fc.c                                 | 2 +-
 drivers/nvme/host/nvme.h                               | 8 +++++++-
 drivers/nvme/host/pci.c                                | 2 +-
 drivers/nvme/host/rdma.c                               | 2 +-
 drivers/nvme/host/tcp.c                                | 4 ++--
 drivers/nvme/target/loop.c                             | 2 +-
 7 files changed, 14 insertions(+), 8 deletions(-)

diff --git a/Documentation/fault-injection/nvme-fault-injection.rst b/Documentation/fault-injection/nvme-fault-injection.rst
index cdb2e829228e3..1d4427890d759 100644
--- a/Documentation/fault-injection/nvme-fault-injection.rst
+++ b/Documentation/fault-injection/nvme-fault-injection.rst
@@ -3,7 +3,7 @@ NVMe Fault Injection
 Linux's fault injection framework provides a systematic way to support
 error injection via debugfs in the /sys/kernel/debug directory. When
 enabled, the default NVME_SC_INVALID_OPCODE with no retry will be
-injected into the nvme_end_request. Users can change the default status
+injected into the nvme_try_complete_req. Users can change the default status
 code and no retry flag via the debugfs. The list of Generic Command
 Status can be found in include/linux/nvme.h
 
diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index 07aacfe46368e..a7f474ddfff76 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2035,7 +2035,7 @@ nvme_fc_fcpio_done(struct nvmefc_fcp_req *req)
 	}
 
 	__nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate);
-	if (!nvme_end_request(rq, status, result))
+	if (!nvme_try_complete_req(rq, status, result))
 		nvme_fc_complete_rq(rq);
 
 check_error:
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index ebb8c3ed38855..510f7dbeba987 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -523,7 +523,13 @@ static inline u32 nvme_bytes_to_numd(size_t len)
 	return (len >> 2) - 1;
 }
 
-static inline bool nvme_end_request(struct request *req, __le16 status,
+/*
+ * Fill in the status and result information from the CQE, and then figure out
+ * if blk-mq will need to use IPI magic to complete the request, and if yes do
+ * so.  If not let the caller complete the request without an indirect function
+ * call.
+ */
+static inline bool nvme_try_complete_req(struct request *req, __le16 status,
 		union nvme_result result)
 {
 	struct nvme_request *rq = nvme_req(req);
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index e001a4ae65b06..b673fa4cf5ea8 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -961,7 +961,7 @@ static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, u16 idx)
 
 	req = blk_mq_tag_to_rq(nvme_queue_tagset(nvmeq), cqe->command_id);
 	trace_nvme_sq(req, cqe->sq_head, nvmeq->sq_tail);
-	if (!nvme_end_request(req, cqe->status, cqe->result))
+	if (!nvme_try_complete_req(req, cqe->status, cqe->result))
 		nvme_pci_complete_rq(req);
 }
 
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 44c76ffbb264c..4c5660201009c 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1189,7 +1189,7 @@ static void nvme_rdma_end_request(struct nvme_rdma_request *req)
 
 	if (!refcount_dec_and_test(&req->ref))
 		return;
-	if (!nvme_end_request(rq, req->status, req->result))
+	if (!nvme_try_complete_req(rq, req->status, req->result))
 		nvme_rdma_complete_rq(rq);
 }
 
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 62fbaecdc960c..3be4749dbf112 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -481,7 +481,7 @@ static int nvme_tcp_process_nvme_cqe(struct nvme_tcp_queue *queue,
 		return -EINVAL;
 	}
 
-	if (!nvme_end_request(rq, cqe->status, cqe->result))
+	if (!nvme_try_complete_req(rq, cqe->status, cqe->result))
 		nvme_complete_rq(rq);
 	queue->nr_cqe++;
 
@@ -672,7 +672,7 @@ static inline void nvme_tcp_end_request(struct request *rq, u16 status)
 {
 	union nvme_result res = {};
 
-	if (!nvme_end_request(rq, cpu_to_le16(status << 1), res))
+	if (!nvme_try_complete_req(rq, cpu_to_le16(status << 1), res))
 		nvme_complete_rq(rq);
 }
 
diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c
index 4884ef1e46a28..0d6008cf66a2a 100644
--- a/drivers/nvme/target/loop.c
+++ b/drivers/nvme/target/loop.c
@@ -115,7 +115,7 @@ static void nvme_loop_queue_response(struct nvmet_req *req)
 			return;
 		}
 
-		if (!nvme_end_request(rq, cqe->status, cqe->result))
+		if (!nvme_try_complete_req(rq, cqe->status, cqe->result))
 			nvme_loop_complete_rq(rq);
 	}
 }
-- 
GitLab


From 5ddaabe8ed713f148e3d67e99b86d99427aceb5c Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 18 Aug 2020 09:11:30 +0200
Subject: [PATCH 0471/1341] nvme: refactor command completion

Lift all the code to decide the dispostition of a completed command
from nvme_complete_rq and nvme_failover_req into a new helper, which
returns an emum of the potential actions.  nvme_complete_rq then
just switches on those and calls the proper helper for the action.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/core.c      | 75 ++++++++++++++++++++++-------------
 drivers/nvme/host/multipath.c | 47 ++++++----------------
 drivers/nvme/host/nvme.h      | 31 +++++++++++++--
 3 files changed, 89 insertions(+), 64 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 6c0d175f2ffa2..9e75f6f62471a 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -241,17 +241,6 @@ static blk_status_t nvme_error_status(u16 status)
 	}
 }
 
-static inline bool nvme_req_needs_retry(struct request *req)
-{
-	if (blk_noretry_request(req))
-		return false;
-	if (nvme_req(req)->status & NVME_SC_DNR)
-		return false;
-	if (nvme_req(req)->retries >= nvme_max_retries)
-		return false;
-	return true;
-}
-
 static void nvme_retry_req(struct request *req)
 {
 	struct nvme_ns *ns = req->q->queuedata;
@@ -268,34 +257,66 @@ static void nvme_retry_req(struct request *req)
 	blk_mq_delay_kick_requeue_list(req->q, delay);
 }
 
-void nvme_complete_rq(struct request *req)
+enum nvme_disposition {
+	COMPLETE,
+	RETRY,
+	FAILOVER,
+};
+
+static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
 {
-	blk_status_t status = nvme_error_status(nvme_req(req)->status);
+	if (likely(nvme_req(req)->status == 0))
+		return COMPLETE;
 
-	trace_nvme_complete_rq(req);
+	if (blk_noretry_request(req) ||
+	    (nvme_req(req)->status & NVME_SC_DNR) ||
+	    nvme_req(req)->retries >= nvme_max_retries)
+		return COMPLETE;
 
-	nvme_cleanup_cmd(req);
+	if (req->cmd_flags & REQ_NVME_MPATH) {
+		if (nvme_is_path_error(nvme_req(req)->status))
+			return FAILOVER;
+	}
 
-	if (nvme_req(req)->ctrl->kas)
-		nvme_req(req)->ctrl->comp_seen = true;
+	if (blk_queue_dying(req->q))
+		return COMPLETE;
 
-	if (unlikely(status != BLK_STS_OK && nvme_req_needs_retry(req))) {
-		if ((req->cmd_flags & REQ_NVME_MPATH) && nvme_failover_req(req))
-			return;
+	return RETRY;
+}
 
-		if (!blk_queue_dying(req->q)) {
-			nvme_retry_req(req);
-			return;
-		}
-	} else if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) &&
-		   req_op(req) == REQ_OP_ZONE_APPEND) {
+static inline void nvme_end_req(struct request *req)
+{
+	blk_status_t status = nvme_error_status(nvme_req(req)->status);
+
+	if (IS_ENABLED(CONFIG_BLK_DEV_ZONED) &&
+	    req_op(req) == REQ_OP_ZONE_APPEND)
 		req->__sector = nvme_lba_to_sect(req->q->queuedata,
 			le64_to_cpu(nvme_req(req)->result.u64));
-	}
 
 	nvme_trace_bio_complete(req, status);
 	blk_mq_end_request(req, status);
 }
+
+void nvme_complete_rq(struct request *req)
+{
+	trace_nvme_complete_rq(req);
+	nvme_cleanup_cmd(req);
+
+	if (nvme_req(req)->ctrl->kas)
+		nvme_req(req)->ctrl->comp_seen = true;
+
+	switch (nvme_decide_disposition(req)) {
+	case COMPLETE:
+		nvme_end_req(req);
+		return;
+	case RETRY:
+		nvme_retry_req(req);
+		return;
+	case FAILOVER:
+		nvme_failover_req(req);
+		return;
+	}
+}
 EXPORT_SYMBOL_GPL(nvme_complete_rq);
 
 bool nvme_cancel_request(struct request *req, void *data, bool reserved)
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c
index 760f625cefc8d..d4ba736c6c890 100644
--- a/drivers/nvme/host/multipath.c
+++ b/drivers/nvme/host/multipath.c
@@ -65,51 +65,30 @@ void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
 	}
 }
 
-bool nvme_failover_req(struct request *req)
+void nvme_failover_req(struct request *req)
 {
 	struct nvme_ns *ns = req->q->queuedata;
-	u16 status = nvme_req(req)->status;
+	u16 status = nvme_req(req)->status & 0x7ff;
 	unsigned long flags;
 
-	switch (status & 0x7ff) {
-	case NVME_SC_ANA_TRANSITION:
-	case NVME_SC_ANA_INACCESSIBLE:
-	case NVME_SC_ANA_PERSISTENT_LOSS:
-		/*
-		 * If we got back an ANA error we know the controller is alive,
-		 * but not ready to serve this namespaces.  The spec suggests
-		 * we should update our general state here, but due to the fact
-		 * that the admin and I/O queues are not serialized that is
-		 * fundamentally racy.  So instead just clear the current path,
-		 * mark the the path as pending and kick of a re-read of the ANA
-		 * log page ASAP.
-		 */
-		nvme_mpath_clear_current_path(ns);
-		if (ns->ctrl->ana_log_buf) {
-			set_bit(NVME_NS_ANA_PENDING, &ns->flags);
-			queue_work(nvme_wq, &ns->ctrl->ana_work);
-		}
-		break;
-	case NVME_SC_HOST_PATH_ERROR:
-	case NVME_SC_HOST_ABORTED_CMD:
-		/*
-		 * Temporary transport disruption in talking to the controller.
-		 * Try to send on a new path.
-		 */
-		nvme_mpath_clear_current_path(ns);
-		break;
-	default:
-		/* This was a non-ANA error so follow the normal error path. */
-		return false;
+	nvme_mpath_clear_current_path(ns);
+
+	/*
+	 * If we got back an ANA error, we know the controller is alive but not
+	 * ready to serve this namespace.  Kick of a re-read of the ANA
+	 * information page, and just try any other available path for now.
+	 */
+	if (nvme_is_ana_error(status) && ns->ctrl->ana_log_buf) {
+		set_bit(NVME_NS_ANA_PENDING, &ns->flags);
+		queue_work(nvme_wq, &ns->ctrl->ana_work);
 	}
 
 	spin_lock_irqsave(&ns->head->requeue_lock, flags);
 	blk_steal_bios(&ns->head->requeue_list, req);
 	spin_unlock_irqrestore(&ns->head->requeue_lock, flags);
-	blk_mq_end_request(req, 0);
 
+	blk_mq_end_request(req, 0);
 	kblockd_schedule_work(&ns->head->requeue_work);
-	return true;
 }
 
 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 510f7dbeba987..4ff6fd2890821 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -523,6 +523,32 @@ static inline u32 nvme_bytes_to_numd(size_t len)
 	return (len >> 2) - 1;
 }
 
+static inline bool nvme_is_ana_error(u16 status)
+{
+	switch (status & 0x7ff) {
+	case NVME_SC_ANA_TRANSITION:
+	case NVME_SC_ANA_INACCESSIBLE:
+	case NVME_SC_ANA_PERSISTENT_LOSS:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static inline bool nvme_is_path_error(u16 status)
+{
+	switch (status & 0x7ff) {
+	case NVME_SC_HOST_PATH_ERROR:
+	case NVME_SC_HOST_ABORTED_CMD:
+	case NVME_SC_ANA_TRANSITION:
+	case NVME_SC_ANA_INACCESSIBLE:
+	case NVME_SC_ANA_PERSISTENT_LOSS:
+		return true;
+	default:
+		return false;
+	}
+}
+
 /*
  * Fill in the status and result information from the CQE, and then figure out
  * if blk-mq will need to use IPI magic to complete the request, and if yes do
@@ -635,7 +661,7 @@ void nvme_mpath_wait_freeze(struct nvme_subsystem *subsys);
 void nvme_mpath_start_freeze(struct nvme_subsystem *subsys);
 void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
 			struct nvme_ctrl *ctrl, int *flags);
-bool nvme_failover_req(struct request *req);
+void nvme_failover_req(struct request *req);
 void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl);
 int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl,struct nvme_ns_head *head);
 void nvme_mpath_add_disk(struct nvme_ns *ns, struct nvme_id_ns *id);
@@ -694,9 +720,8 @@ static inline void nvme_set_disk_name(char *disk_name, struct nvme_ns *ns,
 	sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->head->instance);
 }
 
-static inline bool nvme_failover_req(struct request *req)
+static inline void nvme_failover_req(struct request *req)
 {
-	return false;
 }
 static inline void nvme_kick_requeue_lists(struct nvme_ctrl *ctrl)
 {
-- 
GitLab


From 1e41f3bd26f79463c07aebf062a0a77f1fd39b2b Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 18 Aug 2020 09:11:31 +0200
Subject: [PATCH 0472/1341] nvme: just check the status code type in
 nvme_is_path_error

Check the SCT sub-field for a path related status instead of enumerating
invididual status code.  As of NVMe 1.4 this adds "Internal Path Error"
and "Controller Pathing Error" to the list, but it also future proofs for
additional status codes added to the category.

Suggested-by: Chao Leng <lengchao@huawei.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/nvme.h | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 4ff6fd2890821..e9cf29449dd17 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -537,16 +537,8 @@ static inline bool nvme_is_ana_error(u16 status)
 
 static inline bool nvme_is_path_error(u16 status)
 {
-	switch (status & 0x7ff) {
-	case NVME_SC_HOST_PATH_ERROR:
-	case NVME_SC_HOST_ABORTED_CMD:
-	case NVME_SC_ANA_TRANSITION:
-	case NVME_SC_ANA_INACCESSIBLE:
-	case NVME_SC_ANA_PERSISTENT_LOSS:
-		return true;
-	default:
-		return false;
-	}
+	/* check for a status code type of 'path related status' */
+	return (status & 0x700) == 0x300;
 }
 
 /*
-- 
GitLab


From 5eac5f3342b20825260d3800e7f5f74f12bac931 Mon Sep 17 00:00:00 2001
From: Chao Leng <lengchao@huawei.com>
Date: Tue, 18 Aug 2020 09:11:32 +0200
Subject: [PATCH 0473/1341] nvme: redirect commands on dying queue

If a command send through nvme-multipath failed on a dying queue, resend it
on another path.

Signed-off-by: Chao Leng <lengchao@huawei.com>
[hch: rebased on top of the completion refactoring]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/host/core.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 9e75f6f62471a..c9826ecf80e2a 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -274,13 +274,14 @@ static inline enum nvme_disposition nvme_decide_disposition(struct request *req)
 		return COMPLETE;
 
 	if (req->cmd_flags & REQ_NVME_MPATH) {
-		if (nvme_is_path_error(nvme_req(req)->status))
+		if (nvme_is_path_error(nvme_req(req)->status) ||
+		    blk_queue_dying(req->q))
 			return FAILOVER;
+	} else {
+		if (blk_queue_dying(req->q))
+			return COMPLETE;
 	}
 
-	if (blk_queue_dying(req->q))
-		return COMPLETE;
-
 	return RETRY;
 }
 
-- 
GitLab


From 0d3b6a8d213a30387b5104b2fb25376d18636f23 Mon Sep 17 00:00:00 2001
From: Amit Engel <amit.engel@dell.com>
Date: Wed, 19 Aug 2020 11:31:11 +0300
Subject: [PATCH 0474/1341] nvmet: Disable keep-alive timer when kato is
 cleared to 0h

Based on nvme spec, when keep alive timeout is set to zero
the keep-alive timer should be disabled.

Signed-off-by: Amit Engel <amit.engel@dell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/nvme/target/core.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index b92f45f5cd5b1..c052c922853ad 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -397,6 +397,9 @@ static void nvmet_keep_alive_timer(struct work_struct *work)
 
 static void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl)
 {
+	if (unlikely(ctrl->kato == 0))
+		return;
+
 	pr_debug("ctrl %d start keep-alive timer for %d secs\n",
 		ctrl->cntlid, ctrl->kato);
 
@@ -406,6 +409,9 @@ static void nvmet_start_keep_alive_timer(struct nvmet_ctrl *ctrl)
 
 static void nvmet_stop_keep_alive_timer(struct nvmet_ctrl *ctrl)
 {
+	if (unlikely(ctrl->kato == 0))
+		return;
+
 	pr_debug("ctrl %d stop keep-alive\n", ctrl->cntlid);
 
 	cancel_delayed_work_sync(&ctrl->ka_work);
-- 
GitLab


From 2d62e6b038e729c3e4bfbfcfbd44800ef0883680 Mon Sep 17 00:00:00 2001
From: Hou Pu <houpu@bytedance.com>
Date: Fri, 21 Aug 2020 04:34:42 -0400
Subject: [PATCH 0475/1341] null_blk: fix passing of REQ_FUA flag in
 null_handle_rq

REQ_FUA should be checked using rq->cmd_flags instead of req_op().

Fixes: deb78b419dfda ("nullb: emulate cache")
Signed-off-by: Hou Pu <houpu@bytedance.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/null_blk_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c
index 47a9dad880af2..d74443a9c8fa2 100644
--- a/drivers/block/null_blk_main.c
+++ b/drivers/block/null_blk_main.c
@@ -1147,7 +1147,7 @@ static int null_handle_rq(struct nullb_cmd *cmd)
 		len = bvec.bv_len;
 		err = null_transfer(nullb, bvec.bv_page, len, bvec.bv_offset,
 				     op_is_write(req_op(rq)), sector,
-				     req_op(rq) & REQ_FUA);
+				     rq->cmd_flags & REQ_FUA);
 		if (err) {
 			spin_unlock_irq(&nullb->lock);
 			return err;
-- 
GitLab


From 81dbbb417da4d1ac407dca5b434d39d5b6b91ef3 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Date: Tue, 28 Jul 2020 12:50:06 +0200
Subject: [PATCH 0476/1341] ARM: dts: ls1021a: fix QuadSPI-memory reg range

According to the Reference Manual, the correct size is 512 MiB.

Without this fix, probing the QSPI fails:

    fsl-quadspi 1550000.spi: ioremap failed for resource
        [mem 0x40000000-0x7fffffff]
    fsl-quadspi 1550000.spi: Freescale QuadSPI probe failed
    fsl-quadspi: probe of 1550000.spi failed with error -12

Fixes: 85f8ee78ab72 ("ARM: dts: ls1021a: Add support for QSPI with ls1021a SoC")
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/ls1021a.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/ls1021a.dtsi b/arch/arm/boot/dts/ls1021a.dtsi
index 069af9a19bb64..827373ef1a547 100644
--- a/arch/arm/boot/dts/ls1021a.dtsi
+++ b/arch/arm/boot/dts/ls1021a.dtsi
@@ -182,7 +182,7 @@ qspi: spi@1550000 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <0x0 0x1550000 0x0 0x10000>,
-			      <0x0 0x40000000 0x0 0x40000000>;
+			      <0x0 0x40000000 0x0 0x20000000>;
 			reg-names = "QuadSPI", "QuadSPI-memory";
 			interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>;
 			clock-names = "qspi_en", "qspi";
-- 
GitLab


From 43906812eaab06423f56af5cca9a9fcdbb4ac454 Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@chromium.org>
Date: Tue, 18 Aug 2020 09:31:19 -0700
Subject: [PATCH 0477/1341] drm/msm: enable vblank during atomic commits

This has roughly the same effect as drm_atomic_helper_wait_for_vblanks(),
basically just ensuring that vblank accounting is enabled so that we get
valid timestamp/seqn on pageflip events.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/msm_atomic.c | 36 ++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 5ccfad794c6a5..561bfa48841c3 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -27,6 +27,34 @@ int msm_atomic_prepare_fb(struct drm_plane *plane,
 	return msm_framebuffer_prepare(new_state->fb, kms->aspace);
 }
 
+/*
+ * Helpers to control vblanks while we flush.. basically just to ensure
+ * that vblank accounting is switched on, so we get valid seqn/timestamp
+ * on pageflip events (if requested)
+ */
+
+static void vblank_get(struct msm_kms *kms, unsigned crtc_mask)
+{
+	struct drm_crtc *crtc;
+
+	for_each_crtc_mask(kms->dev, crtc, crtc_mask) {
+		if (!crtc->state->active)
+			continue;
+		drm_crtc_vblank_get(crtc);
+	}
+}
+
+static void vblank_put(struct msm_kms *kms, unsigned crtc_mask)
+{
+	struct drm_crtc *crtc;
+
+	for_each_crtc_mask(kms->dev, crtc, crtc_mask) {
+		if (!crtc->state->active)
+			continue;
+		drm_crtc_vblank_put(crtc);
+	}
+}
+
 static void msm_atomic_async_commit(struct msm_kms *kms, int crtc_idx)
 {
 	unsigned crtc_mask = BIT(crtc_idx);
@@ -44,6 +72,8 @@ static void msm_atomic_async_commit(struct msm_kms *kms, int crtc_idx)
 
 	kms->funcs->enable_commit(kms);
 
+	vblank_get(kms, crtc_mask);
+
 	/*
 	 * Flush hardware updates:
 	 */
@@ -58,6 +88,8 @@ static void msm_atomic_async_commit(struct msm_kms *kms, int crtc_idx)
 	kms->funcs->wait_flush(kms, crtc_mask);
 	trace_msm_atomic_wait_flush_finish(crtc_mask);
 
+	vblank_put(kms, crtc_mask);
+
 	mutex_lock(&kms->commit_lock);
 	kms->funcs->complete_commit(kms, crtc_mask);
 	mutex_unlock(&kms->commit_lock);
@@ -221,6 +253,8 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
 	 */
 	kms->pending_crtc_mask &= ~crtc_mask;
 
+	vblank_get(kms, crtc_mask);
+
 	/*
 	 * Flush hardware updates:
 	 */
@@ -235,6 +269,8 @@ void msm_atomic_commit_tail(struct drm_atomic_state *state)
 	kms->funcs->wait_flush(kms, crtc_mask);
 	trace_msm_atomic_wait_flush_finish(crtc_mask);
 
+	vblank_put(kms, crtc_mask);
+
 	mutex_lock(&kms->commit_lock);
 	kms->funcs->complete_commit(kms, crtc_mask);
 	mutex_unlock(&kms->commit_lock);
-- 
GitLab


From ed0ec1a81faba7572646ceb515ea8cbf9625bbac Mon Sep 17 00:00:00 2001
From: WANG Xuerui <git@xen0n.name>
Date: Wed, 19 Aug 2020 14:07:22 +0800
Subject: [PATCH 0478/1341] MIPS: Loongson64: Remove unnecessary inclusion of
 boot_param.h

The couple of #includes are unused by now; remove to prevent namespace
pollution.

This fixes e.g. build of dm_thin, which has a VIRTUAL symbol that
conflicted with the newly-introduced one in mach-loongson64/boot_param.h.

Fixes: 39c1485c8baa ("MIPS: KVM: Add kvm guest support for Loongson-3")
Signed-off-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Huacai Chen <chenhc@lemote.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/include/asm/mach-loongson64/irq.h    | 2 --
 arch/mips/include/asm/mach-loongson64/mmzone.h | 1 -
 2 files changed, 3 deletions(-)

diff --git a/arch/mips/include/asm/mach-loongson64/irq.h b/arch/mips/include/asm/mach-loongson64/irq.h
index f5e362f797019..bf24809231541 100644
--- a/arch/mips/include/asm/mach-loongson64/irq.h
+++ b/arch/mips/include/asm/mach-loongson64/irq.h
@@ -2,8 +2,6 @@
 #ifndef __ASM_MACH_LOONGSON64_IRQ_H_
 #define __ASM_MACH_LOONGSON64_IRQ_H_
 
-#include <boot_param.h>
-
 /* cpu core interrupt numbers */
 #define NR_IRQS_LEGACY		16
 #define NR_MIPS_CPU_IRQS	8
diff --git a/arch/mips/include/asm/mach-loongson64/mmzone.h b/arch/mips/include/asm/mach-loongson64/mmzone.h
index 3a25dbd3b3e99..5eaca4fe3f924 100644
--- a/arch/mips/include/asm/mach-loongson64/mmzone.h
+++ b/arch/mips/include/asm/mach-loongson64/mmzone.h
@@ -9,7 +9,6 @@
 #ifndef _ASM_MACH_LOONGSON64_MMZONE_H
 #define _ASM_MACH_LOONGSON64_MMZONE_H
 
-#include <boot_param.h>
 #define NODE_ADDRSPACE_SHIFT 44
 #define NODE0_ADDRSPACE_OFFSET 0x000000000000UL
 #define NODE1_ADDRSPACE_OFFSET 0x100000000000UL
-- 
GitLab


From 91dbd73a1739039fa7e9fe5c0169f2817a7f7670 Mon Sep 17 00:00:00 2001
From: He Zhe <zhe.he@windriver.com>
Date: Thu, 20 Aug 2020 20:54:40 +0800
Subject: [PATCH 0479/1341] mips/oprofile: Fix fallthrough placement

We want neither
"
include/linux/compiler_attributes.h:201:41: warning: statement will never
be executed [-Wswitch-unreachable]
  201 | # define fallthrough __attribute__((__fallthrough__))
      |                      ^~~~~~~~~~~~~
"
nor
"
include/linux/compiler_attributes.h:201:41: warning: attribute
'fallthrough' not preceding a case label or default label
  201 | # define fallthrough __attribute__((__fallthrough__))
      |                      ^~~~~~~~~~~~~
"

It's not worth adding one more macro. Let's simply place the fallthrough
in between the expansions.

Fixes: c9b029903466 ("MIPS: Use fallthrough for arch/mips")
Cc: stable@vger.kernel.org
Signed-off-by: He Zhe <zhe.he@windriver.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/oprofile/op_model_mipsxx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/mips/oprofile/op_model_mipsxx.c b/arch/mips/oprofile/op_model_mipsxx.c
index 1493c49ca47a1..55d7b7fd18b6f 100644
--- a/arch/mips/oprofile/op_model_mipsxx.c
+++ b/arch/mips/oprofile/op_model_mipsxx.c
@@ -245,7 +245,6 @@ static int mipsxx_perfcount_handler(void)
 
 	switch (counters) {
 #define HANDLE_COUNTER(n)						\
-	fallthrough;							\
 	case n + 1:							\
 		control = r_c0_perfctrl ## n();				\
 		counter = r_c0_perfcntr ## n();				\
@@ -256,8 +255,11 @@ static int mipsxx_perfcount_handler(void)
 			handled = IRQ_HANDLED;				\
 		}
 	HANDLE_COUNTER(3)
+	fallthrough;
 	HANDLE_COUNTER(2)
+	fallthrough;
 	HANDLE_COUNTER(1)
+	fallthrough;
 	HANDLE_COUNTER(0)
 	}
 
-- 
GitLab


From f1aae40e8dbd2655e3b10cae381a1e8292b19d57 Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Thu, 16 Jul 2020 13:33:52 +0300
Subject: [PATCH 0480/1341] habanalabs: unmap PCI bars upon iATU failure

In case the driver fails to configure the PCI controller iATU, it needs to
unmap the PCI bars before exiting so if the driver is removed, the bars
won't be left mapped.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/pci.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/common/pci.c b/drivers/misc/habanalabs/common/pci.c
index 7bd3737571f38..b8184cb490344 100644
--- a/drivers/misc/habanalabs/common/pci.c
+++ b/drivers/misc/habanalabs/common/pci.c
@@ -369,15 +369,17 @@ int hl_pci_init(struct hl_device *hdev)
 	rc = hdev->asic_funcs->init_iatu(hdev);
 	if (rc) {
 		dev_err(hdev->dev, "Failed to initialize iATU\n");
-		goto disable_device;
+		goto unmap_pci_bars;
 	}
 
 	rc = hl_pci_set_dma_mask(hdev);
 	if (rc)
-		goto disable_device;
+		goto unmap_pci_bars;
 
 	return 0;
 
+unmap_pci_bars:
+	hl_pci_bars_unmap(hdev);
 disable_device:
 	pci_clear_master(pdev);
 	pci_disable_device(pdev);
-- 
GitLab


From bf6d10963ed0db290e9aba05a97bfc4c72c7c0e4 Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Thu, 30 Jul 2020 10:00:10 +0300
Subject: [PATCH 0481/1341] habanalabs: Validate user address before mapping

User address must be validated before driver performs address map.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/command_buffer.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/misc/habanalabs/common/command_buffer.c b/drivers/misc/habanalabs/common/command_buffer.c
index 7c38c4f7f9c02..a8004911c9771 100644
--- a/drivers/misc/habanalabs/common/command_buffer.c
+++ b/drivers/misc/habanalabs/common/command_buffer.c
@@ -10,6 +10,7 @@
 
 #include <linux/mm.h>
 #include <linux/slab.h>
+#include <linux/uaccess.h>
 #include <linux/genalloc.h>
 
 static void cb_fini(struct hl_device *hdev, struct hl_cb *cb)
@@ -300,7 +301,7 @@ int hl_cb_mmap(struct hl_fpriv *hpriv, struct vm_area_struct *vma)
 	struct hl_device *hdev = hpriv->hdev;
 	struct hl_cb *cb;
 	phys_addr_t address;
-	u32 handle;
+	u32 handle, user_cb_size;
 	int rc;
 
 	handle = vma->vm_pgoff;
@@ -314,7 +315,8 @@ int hl_cb_mmap(struct hl_fpriv *hpriv, struct vm_area_struct *vma)
 	}
 
 	/* Validation check */
-	if ((vma->vm_end - vma->vm_start) != ALIGN(cb->size, PAGE_SIZE)) {
+	user_cb_size = vma->vm_end - vma->vm_start;
+	if (user_cb_size != ALIGN(cb->size, PAGE_SIZE)) {
 		dev_err(hdev->dev,
 			"CB mmap failed, mmap size 0x%lx != 0x%x cb size\n",
 			vma->vm_end - vma->vm_start, cb->size);
@@ -322,6 +324,16 @@ int hl_cb_mmap(struct hl_fpriv *hpriv, struct vm_area_struct *vma)
 		goto put_cb;
 	}
 
+	if (!access_ok((void __user *) (uintptr_t) vma->vm_start,
+							user_cb_size)) {
+		dev_err(hdev->dev,
+			"user pointer is invalid - 0x%lx\n",
+			vma->vm_start);
+
+		rc = -EINVAL;
+		goto put_cb;
+	}
+
 	spin_lock(&cb->lock);
 
 	if (cb->mmap) {
-- 
GitLab


From bc75be24fa88ef10eecaff2b2a9ada8189e5ab5d Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Thu, 30 Jul 2020 14:56:38 +0300
Subject: [PATCH 0482/1341] habanalabs: validate packet id during CB parse

During command buffer parsing, driver extracts packet id
from user buffer. Driver must validate this packet id, since it is
being used in order to extract information from internal structures.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/gaudi/gaudi.c | 35 +++++++++++++++++++++++++++
 drivers/misc/habanalabs/goya/goya.c   | 31 ++++++++++++++++++++++++
 2 files changed, 66 insertions(+)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 00a0a7238d814..9ed4989b6fd4c 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -154,6 +154,29 @@ static const u16 gaudi_packet_sizes[MAX_PACKET_ID] = {
 	[PACKET_LOAD_AND_EXE]	= sizeof(struct packet_load_and_exe)
 };
 
+static inline bool validate_packet_id(enum packet_id id)
+{
+	switch (id) {
+	case PACKET_WREG_32:
+	case PACKET_WREG_BULK:
+	case PACKET_MSG_LONG:
+	case PACKET_MSG_SHORT:
+	case PACKET_CP_DMA:
+	case PACKET_REPEAT:
+	case PACKET_MSG_PROT:
+	case PACKET_FENCE:
+	case PACKET_LIN_DMA:
+	case PACKET_NOP:
+	case PACKET_STOP:
+	case PACKET_ARB_POINT:
+	case PACKET_WAIT:
+	case PACKET_LOAD_AND_EXE:
+		return true;
+	default:
+		return false;
+	}
+}
+
 static const char * const
 gaudi_tpc_interrupts_cause[GAUDI_NUM_OF_TPC_INTR_CAUSE] = {
 	"tpc_address_exceed_slm",
@@ -3772,6 +3795,12 @@ static int gaudi_validate_cb(struct hl_device *hdev,
 				PACKET_HEADER_PACKET_ID_MASK) >>
 					PACKET_HEADER_PACKET_ID_SHIFT);
 
+		if (!validate_packet_id(pkt_id)) {
+			dev_err(hdev->dev, "Invalid packet id %u\n", pkt_id);
+			rc = -EINVAL;
+			break;
+		}
+
 		pkt_size = gaudi_packet_sizes[pkt_id];
 		cb_parsed_length += pkt_size;
 		if (cb_parsed_length > parser->user_cb_size) {
@@ -3995,6 +4024,12 @@ static int gaudi_patch_cb(struct hl_device *hdev,
 				PACKET_HEADER_PACKET_ID_MASK) >>
 					PACKET_HEADER_PACKET_ID_SHIFT);
 
+		if (!validate_packet_id(pkt_id)) {
+			dev_err(hdev->dev, "Invalid packet id %u\n", pkt_id);
+			rc = -EINVAL;
+			break;
+		}
+
 		pkt_size = gaudi_packet_sizes[pkt_id];
 		cb_parsed_length += pkt_size;
 		if (cb_parsed_length > parser->user_cb_size) {
diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
index 85030759b2afe..33cd2ae653d23 100644
--- a/drivers/misc/habanalabs/goya/goya.c
+++ b/drivers/misc/habanalabs/goya/goya.c
@@ -139,6 +139,25 @@ static u16 goya_packet_sizes[MAX_PACKET_ID] = {
 	[PACKET_STOP]		= sizeof(struct packet_stop)
 };
 
+static inline bool validate_packet_id(enum packet_id id)
+{
+	switch (id) {
+	case PACKET_WREG_32:
+	case PACKET_WREG_BULK:
+	case PACKET_MSG_LONG:
+	case PACKET_MSG_SHORT:
+	case PACKET_CP_DMA:
+	case PACKET_MSG_PROT:
+	case PACKET_FENCE:
+	case PACKET_LIN_DMA:
+	case PACKET_NOP:
+	case PACKET_STOP:
+		return true;
+	default:
+		return false;
+	}
+}
+
 static u64 goya_mmu_regs[GOYA_MMU_REGS_NUM] = {
 	mmDMA_QM_0_GLBL_NON_SECURE_PROPS,
 	mmDMA_QM_1_GLBL_NON_SECURE_PROPS,
@@ -3455,6 +3474,12 @@ static int goya_validate_cb(struct hl_device *hdev,
 				PACKET_HEADER_PACKET_ID_MASK) >>
 					PACKET_HEADER_PACKET_ID_SHIFT);
 
+		if (!validate_packet_id(pkt_id)) {
+			dev_err(hdev->dev, "Invalid packet id %u\n", pkt_id);
+			rc = -EINVAL;
+			break;
+		}
+
 		pkt_size = goya_packet_sizes[pkt_id];
 		cb_parsed_length += pkt_size;
 		if (cb_parsed_length > parser->user_cb_size) {
@@ -3690,6 +3715,12 @@ static int goya_patch_cb(struct hl_device *hdev,
 				PACKET_HEADER_PACKET_ID_MASK) >>
 					PACKET_HEADER_PACKET_ID_SHIFT);
 
+		if (!validate_packet_id(pkt_id)) {
+			dev_err(hdev->dev, "Invalid packet id %u\n", pkt_id);
+			rc = -EINVAL;
+			break;
+		}
+
 		pkt_size = goya_packet_sizes[pkt_id];
 		cb_parsed_length += pkt_size;
 		if (cb_parsed_length > parser->user_cb_size) {
-- 
GitLab


From eeec23cd325ad4d83927b8ee162693579cf3813f Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 3 Aug 2020 17:36:36 +0300
Subject: [PATCH 0483/1341] habanalabs: Fix memory corruption in debugfs

This has to be a long instead of a u32 because we write a long value.
On 64 bit systems, this will cause memory corruption.

Fixes: c216477363a3 ("habanalabs: add debugfs support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/debugfs.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/habanalabs/common/debugfs.c b/drivers/misc/habanalabs/common/debugfs.c
index c50c6fc9e905b..37701e4f9d5af 100644
--- a/drivers/misc/habanalabs/common/debugfs.c
+++ b/drivers/misc/habanalabs/common/debugfs.c
@@ -19,7 +19,7 @@
 static struct dentry *hl_debug_root;
 
 static int hl_debugfs_i2c_read(struct hl_device *hdev, u8 i2c_bus, u8 i2c_addr,
-				u8 i2c_reg, u32 *val)
+				u8 i2c_reg, long *val)
 {
 	struct armcp_packet pkt;
 	int rc;
@@ -36,7 +36,7 @@ static int hl_debugfs_i2c_read(struct hl_device *hdev, u8 i2c_bus, u8 i2c_addr,
 	pkt.i2c_reg = i2c_reg;
 
 	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
-						0, (long *) val);
+						0, val);
 
 	if (rc)
 		dev_err(hdev->dev, "Failed to read from I2C, error %d\n", rc);
@@ -827,7 +827,7 @@ static ssize_t hl_i2c_data_read(struct file *f, char __user *buf,
 	struct hl_dbg_device_entry *entry = file_inode(f)->i_private;
 	struct hl_device *hdev = entry->hdev;
 	char tmp_buf[32];
-	u32 val;
+	long val;
 	ssize_t rc;
 
 	if (*ppos)
@@ -842,7 +842,7 @@ static ssize_t hl_i2c_data_read(struct file *f, char __user *buf,
 		return rc;
 	}
 
-	sprintf(tmp_buf, "0x%02x\n", val);
+	sprintf(tmp_buf, "0x%02lx\n", val);
 	rc = simple_read_from_buffer(buf, count, ppos, tmp_buf,
 			strlen(tmp_buf));
 
-- 
GitLab


From b0353540ffd2d78dca232990719916bee58c7523 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 5 Aug 2020 12:51:05 +0300
Subject: [PATCH 0484/1341] habanalabs: Fix a loop in gaudi_extract_ecc_info()

The condition was reversed.  It should have been less than instead of
greater than.  The result is that we never enter the loop.

Fixes: fcc6a4e60678 ("habanalabs: Extract ECC information from FW")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/gaudi/gaudi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 9ed4989b6fd4c..08124873483fe 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -5250,7 +5250,7 @@ static int gaudi_extract_ecc_info(struct hl_device *hdev,
 	*memory_wrapper_idx = 0xFF;
 
 	/* Iterate through memory wrappers, a single bit must be set */
-	for (i = 0 ; i > num_mem_regs ; i++) {
+	for (i = 0 ; i < num_mem_regs ; i++) {
 		err_addr += i * 4;
 		err_word = RREG32(err_addr);
 		if (err_word) {
-- 
GitLab


From 1cff11974080f47864d56ef97db228c51fcb8a0c Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Wed, 5 Aug 2020 13:55:12 +0300
Subject: [PATCH 0485/1341] habanalabs: verify user input in
 cs_ioctl_signal_wait

User input must be validated before using it to
access internal structures.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/command_submission.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/misc/habanalabs/common/command_submission.c b/drivers/misc/habanalabs/common/command_submission.c
index b9840e368eb57..2e3fcbc794db4 100644
--- a/drivers/misc/habanalabs/common/command_submission.c
+++ b/drivers/misc/habanalabs/common/command_submission.c
@@ -808,6 +808,14 @@ static int cs_ioctl_signal_wait(struct hl_fpriv *hpriv, enum hl_cs_type cs_type,
 
 	/* currently it is guaranteed to have only one chunk */
 	chunk = &cs_chunk_array[0];
+
+	if (chunk->queue_index >= hdev->asic_prop.max_queues) {
+		dev_err(hdev->dev, "Queue index %d is invalid\n",
+			chunk->queue_index);
+		rc = -EINVAL;
+		goto free_cs_chunk_array;
+	}
+
 	q_idx = chunk->queue_index;
 	hw_queue_prop = &hdev->asic_prop.hw_queues_props[q_idx];
 	q_type = hw_queue_prop->type;
-- 
GitLab


From f44d23b9095abd91dad9f5f3add2a3149833ec83 Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Tue, 4 Aug 2020 13:38:43 +0300
Subject: [PATCH 0486/1341] habanalabs: set clock gating according to mask

Once clock gating is set we enable clock gating according to mask,
we should also disable clock gating according to relevant bits.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/gaudi/gaudi.c | 44 +++++++++++++--------------
 1 file changed, 21 insertions(+), 23 deletions(-)

diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 08124873483fe..7e0f9f64ffcbe 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -2508,6 +2508,7 @@ static void gaudi_set_clock_gating(struct hl_device *hdev)
 {
 	struct gaudi_device *gaudi = hdev->asic_specific;
 	u32 qman_offset;
+	bool enable;
 	int i;
 
 	/* In case we are during debug session, don't enable the clock gate
@@ -2517,46 +2518,43 @@ static void gaudi_set_clock_gating(struct hl_device *hdev)
 		return;
 
 	for (i = GAUDI_PCI_DMA_1, qman_offset = 0 ; i < GAUDI_HBM_DMA_1 ; i++) {
-		if (!(hdev->clock_gating_mask &
-					(BIT_ULL(gaudi_dma_assignment[i]))))
-			continue;
+		enable = !!(hdev->clock_gating_mask &
+				(BIT_ULL(gaudi_dma_assignment[i])));
 
 		qman_offset = gaudi_dma_assignment[i] * DMA_QMAN_OFFSET;
-		WREG32(mmDMA0_QM_CGM_CFG1 + qman_offset, QMAN_CGM1_PWR_GATE_EN);
+		WREG32(mmDMA0_QM_CGM_CFG1 + qman_offset,
+				enable ? QMAN_CGM1_PWR_GATE_EN : 0);
 		WREG32(mmDMA0_QM_CGM_CFG + qman_offset,
-				QMAN_UPPER_CP_CGM_PWR_GATE_EN);
+				enable ? QMAN_UPPER_CP_CGM_PWR_GATE_EN : 0);
 	}
 
 	for (i = GAUDI_HBM_DMA_1 ; i < GAUDI_DMA_MAX ; i++) {
-		if (!(hdev->clock_gating_mask &
-					(BIT_ULL(gaudi_dma_assignment[i]))))
-			continue;
+		enable = !!(hdev->clock_gating_mask &
+				(BIT_ULL(gaudi_dma_assignment[i])));
 
 		qman_offset = gaudi_dma_assignment[i] * DMA_QMAN_OFFSET;
-		WREG32(mmDMA0_QM_CGM_CFG1 + qman_offset, QMAN_CGM1_PWR_GATE_EN);
+		WREG32(mmDMA0_QM_CGM_CFG1 + qman_offset,
+				enable ? QMAN_CGM1_PWR_GATE_EN : 0);
 		WREG32(mmDMA0_QM_CGM_CFG + qman_offset,
-				QMAN_COMMON_CP_CGM_PWR_GATE_EN);
+				enable ? QMAN_COMMON_CP_CGM_PWR_GATE_EN : 0);
 	}
 
-	if (hdev->clock_gating_mask & (BIT_ULL(GAUDI_ENGINE_ID_MME_0))) {
-		WREG32(mmMME0_QM_CGM_CFG1, QMAN_CGM1_PWR_GATE_EN);
-		WREG32(mmMME0_QM_CGM_CFG, QMAN_COMMON_CP_CGM_PWR_GATE_EN);
-	}
+	enable = !!(hdev->clock_gating_mask & (BIT_ULL(GAUDI_ENGINE_ID_MME_0)));
+	WREG32(mmMME0_QM_CGM_CFG1, enable ? QMAN_CGM1_PWR_GATE_EN : 0);
+	WREG32(mmMME0_QM_CGM_CFG, enable ? QMAN_COMMON_CP_CGM_PWR_GATE_EN : 0);
 
-	if (hdev->clock_gating_mask & (BIT_ULL(GAUDI_ENGINE_ID_MME_2))) {
-		WREG32(mmMME2_QM_CGM_CFG1, QMAN_CGM1_PWR_GATE_EN);
-		WREG32(mmMME2_QM_CGM_CFG, QMAN_COMMON_CP_CGM_PWR_GATE_EN);
-	}
+	enable = !!(hdev->clock_gating_mask & (BIT_ULL(GAUDI_ENGINE_ID_MME_2)));
+	WREG32(mmMME2_QM_CGM_CFG1, enable ? QMAN_CGM1_PWR_GATE_EN : 0);
+	WREG32(mmMME2_QM_CGM_CFG, enable ? QMAN_COMMON_CP_CGM_PWR_GATE_EN : 0);
 
 	for (i = 0, qman_offset = 0 ; i < TPC_NUMBER_OF_ENGINES ; i++) {
-		if (!(hdev->clock_gating_mask &
-					(BIT_ULL(GAUDI_ENGINE_ID_TPC_0 + i))))
-			continue;
+		enable = !!(hdev->clock_gating_mask &
+				(BIT_ULL(GAUDI_ENGINE_ID_TPC_0 + i)));
 
 		WREG32(mmTPC0_QM_CGM_CFG1 + qman_offset,
-				QMAN_CGM1_PWR_GATE_EN);
+				enable ? QMAN_CGM1_PWR_GATE_EN : 0);
 		WREG32(mmTPC0_QM_CGM_CFG + qman_offset,
-				QMAN_COMMON_CP_CGM_PWR_GATE_EN);
+				enable ? QMAN_COMMON_CP_CGM_PWR_GATE_EN : 0);
 
 		qman_offset += TPC_QMAN_OFFSET;
 	}
-- 
GitLab


From 36545279f076afeb77104f5ffeab850da3b6d107 Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Thu, 6 Aug 2020 11:33:27 +0300
Subject: [PATCH 0487/1341] habanalabs: proper handling of alloc size in
 coresight

Allocation size can go up to 64bit but truncated to 32bit,
we should make sure it is not truncated and validate no address
overflow.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/habanalabs.h     | 2 +-
 drivers/misc/habanalabs/gaudi/gaudi_coresight.c | 8 +++++++-
 drivers/misc/habanalabs/goya/goya_coresight.c   | 8 +++++++-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 018d9d67e8e6a..13c18f3d9a9b2 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -1651,7 +1651,7 @@ struct hl_ioctl_desc {
  *
  * Return: true if the area is inside the valid range, false otherwise.
  */
-static inline bool hl_mem_area_inside_range(u64 address, u32 size,
+static inline bool hl_mem_area_inside_range(u64 address, u64 size,
 				u64 range_start_address, u64 range_end_address)
 {
 	u64 end_address = address + size;
diff --git a/drivers/misc/habanalabs/gaudi/gaudi_coresight.c b/drivers/misc/habanalabs/gaudi/gaudi_coresight.c
index 5673ee49819e6..881531d4d9da8 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi_coresight.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi_coresight.c
@@ -527,7 +527,7 @@ static int gaudi_config_etf(struct hl_device *hdev,
 }
 
 static bool gaudi_etr_validate_address(struct hl_device *hdev, u64 addr,
-					u32 size, bool *is_host)
+					u64 size, bool *is_host)
 {
 	struct asic_fixed_properties *prop = &hdev->asic_prop;
 	struct gaudi_device *gaudi = hdev->asic_specific;
@@ -539,6 +539,12 @@ static bool gaudi_etr_validate_address(struct hl_device *hdev, u64 addr,
 		return false;
 	}
 
+	if (addr > (addr + size)) {
+		dev_err(hdev->dev,
+			"ETR buffer size %llu overflow\n", size);
+		return false;
+	}
+
 	/* PMMU and HPMMU addresses are equal, check only one of them */
 	if ((gaudi->hw_cap_initialized & HW_CAP_MMU) &&
 		hl_mem_area_inside_range(addr, size,
diff --git a/drivers/misc/habanalabs/goya/goya_coresight.c b/drivers/misc/habanalabs/goya/goya_coresight.c
index b03912483de00..4027a6a334d7a 100644
--- a/drivers/misc/habanalabs/goya/goya_coresight.c
+++ b/drivers/misc/habanalabs/goya/goya_coresight.c
@@ -362,11 +362,17 @@ static int goya_config_etf(struct hl_device *hdev,
 }
 
 static int goya_etr_validate_address(struct hl_device *hdev, u64 addr,
-		u32 size)
+		u64 size)
 {
 	struct asic_fixed_properties *prop = &hdev->asic_prop;
 	u64 range_start, range_end;
 
+	if (addr > (addr + size)) {
+		dev_err(hdev->dev,
+			"ETR buffer size %llu overflow\n", size);
+		return false;
+	}
+
 	if (hdev->mmu_enable) {
 		range_start = prop->dmmu.start_addr;
 		range_end = prop->dmmu.end_addr;
-- 
GitLab


From 58361aae4b0eed388680a89ac153d27177f40510 Mon Sep 17 00:00:00 2001
From: Oded Gabbay <oded.gabbay@gmail.com>
Date: Sat, 8 Aug 2020 23:34:47 +0300
Subject: [PATCH 0488/1341] habanalabs: set max power according to card type

In Gaudi, the default max power setting is different between PCI and PMC
cards. Therefore, the driver need to set the default after knowing what is
the card type.

The current code has a bug where it limits the maximum power of the PMC
card to 200W after a reset occurs.

Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/device.c     |  7 ++++++-
 drivers/misc/habanalabs/common/habanalabs.h |  5 ++++-
 drivers/misc/habanalabs/common/sysfs.c      |  7 ++++---
 drivers/misc/habanalabs/gaudi/gaudi.c       | 11 ++++++++++-
 drivers/misc/habanalabs/gaudi/gaudiP.h      |  3 ++-
 5 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index be16b75bdfdb5..8e34c39380a9b 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -1069,7 +1069,7 @@ int hl_device_reset(struct hl_device *hdev, bool hard_reset,
 			goto out_err;
 		}
 
-		hl_set_max_power(hdev, hdev->max_power);
+		hl_set_max_power(hdev);
 	} else {
 		rc = hdev->asic_funcs->soft_reset_late_init(hdev);
 		if (rc) {
@@ -1318,6 +1318,11 @@ int hl_device_init(struct hl_device *hdev, struct class *hclass)
 		goto out_disabled;
 	}
 
+	/* Need to call this again because the max power might change,
+	 * depending on card type for certain ASICs
+	 */
+	hl_set_max_power(hdev);
+
 	/*
 	 * hl_hwmon_init() must be called after device_late_init(), because only
 	 * there we get the information from the device about which
diff --git a/drivers/misc/habanalabs/common/habanalabs.h b/drivers/misc/habanalabs/common/habanalabs.h
index 13c18f3d9a9b2..edbd627b29d25 100644
--- a/drivers/misc/habanalabs/common/habanalabs.h
+++ b/drivers/misc/habanalabs/common/habanalabs.h
@@ -1462,6 +1462,8 @@ struct hl_device_idle_busy_ts {
  *                     details.
  * @in_reset: is device in reset flow.
  * @curr_pll_profile: current PLL profile.
+ * @card_type: Various ASICs have several card types. This indicates the card
+ *             type of the current device.
  * @cs_active_cnt: number of active command submissions on this device (active
  *                 means already in H/W queues)
  * @major: habanalabs kernel driver major.
@@ -1566,6 +1568,7 @@ struct hl_device {
 	u64				clock_gating_mask;
 	atomic_t			in_reset;
 	enum hl_pll_frequency		curr_pll_profile;
+	enum armcp_card_types		card_type;
 	int				cs_active_cnt;
 	u32				major;
 	u32				high_pll;
@@ -1858,7 +1861,7 @@ int hl_get_pwm_info(struct hl_device *hdev,
 void hl_set_pwm_info(struct hl_device *hdev, int sensor_index, u32 attr,
 			long value);
 u64 hl_get_max_power(struct hl_device *hdev);
-void hl_set_max_power(struct hl_device *hdev, u64 value);
+void hl_set_max_power(struct hl_device *hdev);
 int hl_set_voltage(struct hl_device *hdev,
 			int sensor_index, u32 attr, long value);
 int hl_set_current(struct hl_device *hdev,
diff --git a/drivers/misc/habanalabs/common/sysfs.c b/drivers/misc/habanalabs/common/sysfs.c
index b3cb0ac4721c5..5ae484cc84cd4 100644
--- a/drivers/misc/habanalabs/common/sysfs.c
+++ b/drivers/misc/habanalabs/common/sysfs.c
@@ -81,7 +81,7 @@ u64 hl_get_max_power(struct hl_device *hdev)
 	return result;
 }
 
-void hl_set_max_power(struct hl_device *hdev, u64 value)
+void hl_set_max_power(struct hl_device *hdev)
 {
 	struct armcp_packet pkt;
 	int rc;
@@ -90,7 +90,7 @@ void hl_set_max_power(struct hl_device *hdev, u64 value)
 
 	pkt.ctl = cpu_to_le32(ARMCP_PACKET_MAX_POWER_SET <<
 				ARMCP_PKT_CTL_OPCODE_SHIFT);
-	pkt.value = cpu_to_le64(value);
+	pkt.value = cpu_to_le64(hdev->max_power);
 
 	rc = hdev->asic_funcs->send_cpu_message(hdev, (u32 *) &pkt, sizeof(pkt),
 						0, NULL);
@@ -316,7 +316,7 @@ static ssize_t max_power_store(struct device *dev,
 	}
 
 	hdev->max_power = value;
-	hl_set_max_power(hdev, value);
+	hl_set_max_power(hdev);
 
 out:
 	return count;
@@ -422,6 +422,7 @@ int hl_sysfs_init(struct hl_device *hdev)
 		hdev->pm_mng_profile = PM_AUTO;
 	else
 		hdev->pm_mng_profile = PM_MANUAL;
+
 	hdev->max_power = hdev->asic_prop.max_power_default;
 
 	hdev->asic_funcs->add_device_attr(hdev, &hl_dev_clks_attr_group);
diff --git a/drivers/misc/habanalabs/gaudi/gaudi.c b/drivers/misc/habanalabs/gaudi/gaudi.c
index 7e0f9f64ffcbe..4009b7df4cafe 100644
--- a/drivers/misc/habanalabs/gaudi/gaudi.c
+++ b/drivers/misc/habanalabs/gaudi/gaudi.c
@@ -456,7 +456,7 @@ static int gaudi_get_fixed_properties(struct hl_device *hdev)
 	prop->num_of_events = GAUDI_EVENT_SIZE;
 	prop->tpc_enabled_mask = TPC_ENABLED_MASK;
 
-	prop->max_power_default = MAX_POWER_DEFAULT;
+	prop->max_power_default = MAX_POWER_DEFAULT_PCI;
 
 	prop->cb_pool_cb_cnt = GAUDI_CB_POOL_CB_CNT;
 	prop->cb_pool_cb_size = GAUDI_CB_POOL_CB_SIZE;
@@ -6055,6 +6055,15 @@ static int gaudi_armcp_info_get(struct hl_device *hdev)
 		strncpy(prop->armcp_info.card_name, GAUDI_DEFAULT_CARD_NAME,
 				CARD_NAME_MAX_LEN);
 
+	hdev->card_type = le32_to_cpu(hdev->asic_prop.armcp_info.card_type);
+
+	if (hdev->card_type == armcp_card_type_pci)
+		prop->max_power_default = MAX_POWER_DEFAULT_PCI;
+	else if (hdev->card_type == armcp_card_type_pmc)
+		prop->max_power_default = MAX_POWER_DEFAULT_PMC;
+
+	hdev->max_power = prop->max_power_default;
+
 	return 0;
 }
 
diff --git a/drivers/misc/habanalabs/gaudi/gaudiP.h b/drivers/misc/habanalabs/gaudi/gaudiP.h
index 5dc99f6f02963..82137c3f3e2e6 100644
--- a/drivers/misc/habanalabs/gaudi/gaudiP.h
+++ b/drivers/misc/habanalabs/gaudi/gaudiP.h
@@ -41,7 +41,8 @@
 
 #define GAUDI_MAX_CLK_FREQ		2200000000ull	/* 2200 MHz */
 
-#define MAX_POWER_DEFAULT		200000		/* 200W */
+#define MAX_POWER_DEFAULT_PCI		200000		/* 200W */
+#define MAX_POWER_DEFAULT_PMC		350000		/* 350W */
 
 #define GAUDI_CPU_TIMEOUT_USEC		15000000	/* 15s */
 
-- 
GitLab


From 804d057cfae25c5447b36099fa59682d0d184ed6 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Thu, 30 Jul 2020 09:20:22 +0100
Subject: [PATCH 0489/1341] habanalabs: fix incorrect check on failed workqueue
 create

The null check on a failed workqueue create is currently null checking
hdev->cq_wq rather than the pointer hdev->cq_wq[i] and so the test
will never be true on a failed workqueue create. Fix this by checking
hdev->cq_wq[i].

Addresses-Coverity: ("Dereference before null check")
Fixes: 5574cb2194b1 ("habanalabs: Assign each CQ with its own work queue")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/device.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/common/device.c b/drivers/misc/habanalabs/common/device.c
index 8e34c39380a9b..24b01cce0a384 100644
--- a/drivers/misc/habanalabs/common/device.c
+++ b/drivers/misc/habanalabs/common/device.c
@@ -288,7 +288,7 @@ static int device_early_init(struct hl_device *hdev)
 	for (i = 0 ; i < hdev->asic_prop.completion_queues_count ; i++) {
 		snprintf(workq_name, 32, "hl-free-jobs-%u", i);
 		hdev->cq_wq[i] = create_singlethread_workqueue(workq_name);
-		if (hdev->cq_wq == NULL) {
+		if (hdev->cq_wq[i] == NULL) {
 			dev_err(hdev->dev, "Failed to allocate CQ workqueue\n");
 			rc = -ENOMEM;
 			goto free_cq_wq;
-- 
GitLab


From bce382a8bb080ed5f2f3a06754526dc58b91cca2 Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Tue, 11 Aug 2020 09:19:53 +0300
Subject: [PATCH 0490/1341] habanalabs: validate FW file size

We must validate FW size in order not to corrupt memory in case
a malicious FW file will be present in system.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/firmware_if.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/misc/habanalabs/common/firmware_if.c b/drivers/misc/habanalabs/common/firmware_if.c
index f70302cdab1bd..f52bc690dfc5c 100644
--- a/drivers/misc/habanalabs/common/firmware_if.c
+++ b/drivers/misc/habanalabs/common/firmware_if.c
@@ -13,6 +13,7 @@
 #include <linux/io-64-nonatomic-lo-hi.h>
 #include <linux/slab.h>
 
+#define FW_FILE_MAX_SIZE	0x1400000 /* maximum size of 20MB */
 /**
  * hl_fw_load_fw_to_device() - Load F/W code to device's memory.
  *
@@ -48,6 +49,14 @@ int hl_fw_load_fw_to_device(struct hl_device *hdev, const char *fw_name,
 
 	dev_dbg(hdev->dev, "%s firmware size == %zu\n", fw_name, fw_size);
 
+	if (fw_size > FW_FILE_MAX_SIZE) {
+		dev_err(hdev->dev,
+			"FW file size %zu exceeds maximum of %u bytes\n",
+			fw_size, FW_FILE_MAX_SIZE);
+		rc = -EINVAL;
+		goto out;
+	}
+
 	fw_data = (const u64 *) fw->data;
 
 	memcpy_toio(dst, fw_data, fw_size);
-- 
GitLab


From 0839152f8c1efc1cc2d515d1ff1e253ca9402ad3 Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Tue, 11 Aug 2020 08:57:45 +0300
Subject: [PATCH 0491/1341] habanalabs: check correct vmalloc return code

vmalloc can return different return code than NULL and a valid
pointer. We must validate it in order to dereference a non valid
pointer.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/memory.c | 9 +++++++--
 drivers/misc/habanalabs/common/mmu.c    | 2 +-
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/misc/habanalabs/common/memory.c b/drivers/misc/habanalabs/common/memory.c
index dce9273e557a0..5ff4688683fd3 100644
--- a/drivers/misc/habanalabs/common/memory.c
+++ b/drivers/misc/habanalabs/common/memory.c
@@ -66,6 +66,11 @@ static int alloc_device_memory(struct hl_ctx *ctx, struct hl_mem_in *args,
 	num_pgs = (args->alloc.mem_size + (page_size - 1)) >> page_shift;
 	total_size = num_pgs << page_shift;
 
+	if (!total_size) {
+		dev_err(hdev->dev, "Cannot allocate 0 bytes\n");
+		return -EINVAL;
+	}
+
 	contiguous = args->flags & HL_MEM_CONTIGUOUS;
 
 	if (contiguous) {
@@ -93,7 +98,7 @@ static int alloc_device_memory(struct hl_ctx *ctx, struct hl_mem_in *args,
 	phys_pg_pack->contiguous = contiguous;
 
 	phys_pg_pack->pages = kvmalloc_array(num_pgs, sizeof(u64), GFP_KERNEL);
-	if (!phys_pg_pack->pages) {
+	if (ZERO_OR_NULL_PTR(phys_pg_pack->pages)) {
 		rc = -ENOMEM;
 		goto pages_arr_err;
 	}
@@ -683,7 +688,7 @@ static int init_phys_pg_pack_from_userptr(struct hl_ctx *ctx,
 
 	phys_pg_pack->pages = kvmalloc_array(total_npages, sizeof(u64),
 						GFP_KERNEL);
-	if (!phys_pg_pack->pages) {
+	if (ZERO_OR_NULL_PTR(phys_pg_pack->pages)) {
 		rc = -ENOMEM;
 		goto page_pack_arr_mem_err;
 	}
diff --git a/drivers/misc/habanalabs/common/mmu.c b/drivers/misc/habanalabs/common/mmu.c
index edcc11d5eaf15..3fc0f497fab34 100644
--- a/drivers/misc/habanalabs/common/mmu.c
+++ b/drivers/misc/habanalabs/common/mmu.c
@@ -450,7 +450,7 @@ int hl_mmu_init(struct hl_device *hdev)
 	hdev->mmu_shadow_hop0 = kvmalloc_array(prop->max_asid,
 					prop->mmu_hop_table_size,
 					GFP_KERNEL | __GFP_ZERO);
-	if (!hdev->mmu_shadow_hop0) {
+	if (ZERO_OR_NULL_PTR(hdev->mmu_shadow_hop0)) {
 		rc = -ENOMEM;
 		goto err_pool_add;
 	}
-- 
GitLab


From 5aba368893c0d9e275f4b823e053fd16155f63b9 Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Tue, 11 Aug 2020 08:11:49 +0300
Subject: [PATCH 0492/1341] habanalabs: correctly report inbound pci region cfg
 error

During inbound iATU configuration we can get errors while
configuring PCI registers, there is a certain scenario in which these
errors are not reflected and driver is loaded with wrong configuration.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/common/pci.c b/drivers/misc/habanalabs/common/pci.c
index b8184cb490344..2770f03b6cbb2 100644
--- a/drivers/misc/habanalabs/common/pci.c
+++ b/drivers/misc/habanalabs/common/pci.c
@@ -227,7 +227,7 @@ int hl_pci_set_inbound_region(struct hl_device *hdev, u8 region,
 	}
 
 	/* Point to the specified address */
-	rc = hl_pci_iatu_write(hdev, offset + 0x14,
+	rc |= hl_pci_iatu_write(hdev, offset + 0x14,
 			lower_32_bits(pci_region->addr));
 	rc |= hl_pci_iatu_write(hdev, offset + 0x18,
 			upper_32_bits(pci_region->addr));
-- 
GitLab


From 336306790b2bbf7ce837625fa3b24ba724d05838 Mon Sep 17 00:00:00 2001
From: Gwendal Grignou <gwendal@chromium.org>
Date: Tue, 28 Jul 2020 13:48:25 -0700
Subject: [PATCH 0493/1341] iio: cros_ec: Set Gyroscope default frequency to
 25Hz

BMI160 Minimium gyroscope frequency in normal mode is 25Hz.
When older EC firmware do not report their sensors frequencies,
use 25Hz as the minimum for gyroscope to be sure it works on BMI160.

Fixes: ae7b02ad2f32d ("iio: common: cros_ec_sensors: Expose cros_ec_sensors frequency range via iio sysfs")
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
index ea480c1d4349e..1bc6efa473163 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
@@ -72,10 +72,13 @@ static void get_default_min_max_freq(enum motionsensor_type type,
 
 	switch (type) {
 	case MOTIONSENSE_TYPE_ACCEL:
-	case MOTIONSENSE_TYPE_GYRO:
 		*min_freq = 12500;
 		*max_freq = 100000;
 		break;
+	case MOTIONSENSE_TYPE_GYRO:
+		*min_freq = 25000;
+		*max_freq = 100000;
+		break;
 	case MOTIONSENSE_TYPE_MAG:
 		*min_freq = 5000;
 		*max_freq = 25000;
-- 
GitLab


From ab3300deff6a81cc10887437383fc8a63884c3f9 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 27 Jul 2020 14:23:16 +0300
Subject: [PATCH 0494/1341] counter: microchip-tcb-capture: check the correct
 variable

This should be testing "regmap" instead of "priv->regmap".  The
"priv->regmap" variable is always zero so it's not an error pointer.

Fixes: 106b104137fd ("counter: Add microchip TCB capture counter")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/counter/microchip-tcb-capture.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/counter/microchip-tcb-capture.c b/drivers/counter/microchip-tcb-capture.c
index f7b7743ddb947..b7b252c5addf1 100644
--- a/drivers/counter/microchip-tcb-capture.c
+++ b/drivers/counter/microchip-tcb-capture.c
@@ -320,8 +320,8 @@ static int mchp_tc_probe(struct platform_device *pdev)
 	}
 
 	regmap = syscon_node_to_regmap(np->parent);
-	if (IS_ERR(priv->regmap))
-		return PTR_ERR(priv->regmap);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
 
 	/* max. channels number is 2 when in QDEC mode */
 	priv->num_channels = of_property_count_u32_elems(np, "reg");
-- 
GitLab


From e71e6dbe96ac80ac2aebe71a6a942e7bd60e7596 Mon Sep 17 00:00:00 2001
From: Maxim Kochetkov <fido_max@inbox.ru>
Date: Mon, 3 Aug 2020 08:04:05 +0300
Subject: [PATCH 0495/1341] iio: adc: ti-ads1015: fix conversion when CONFIG_PM
 is not set

To stop conversion ads1015_set_power_state() function call unimplemented
function __pm_runtime_suspend() from pm_runtime_put_autosuspend()
if CONFIG_PM is not set.
In case of CONFIG_PM is not set: __pm_runtime_suspend() returns -ENOSYS,
so ads1015_read_raw() failed because ads1015_set_power_state() returns an
error.

If CONFIG_PM is disabled, there is no need to start/stop conversion.
Fix it by adding return 0 function variant if CONFIG_PM is not set.

Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>
Fixes: ecc24e72f437 ("iio: adc: Add TI ADS1015 ADC driver support")
Tested-by: Maxim Kiselev <bigunclemax@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/adc/ti-ads1015.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
index f42ab112986ec..9fef39bcf997b 100644
--- a/drivers/iio/adc/ti-ads1015.c
+++ b/drivers/iio/adc/ti-ads1015.c
@@ -316,6 +316,7 @@ static const struct iio_chan_spec ads1115_channels[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(ADS1015_TIMESTAMP),
 };
 
+#ifdef CONFIG_PM
 static int ads1015_set_power_state(struct ads1015_data *data, bool on)
 {
 	int ret;
@@ -333,6 +334,15 @@ static int ads1015_set_power_state(struct ads1015_data *data, bool on)
 	return ret < 0 ? ret : 0;
 }
 
+#else /* !CONFIG_PM */
+
+static int ads1015_set_power_state(struct ads1015_data *data, bool on)
+{
+	return 0;
+}
+
+#endif /* !CONFIG_PM */
+
 static
 int ads1015_get_adc_result(struct ads1015_data *data, int chan, int *val)
 {
-- 
GitLab


From e3ea4192d82480e1215280267746f51ce21db283 Mon Sep 17 00:00:00 2001
From: Michael Walle <michael@walle.cc>
Date: Mon, 3 Aug 2020 10:30:01 +0200
Subject: [PATCH 0496/1341] iio: adc: rockchip_saradc: select
 IIO_TRIGGERED_BUFFER

The kernel fails to compile due to undefined reference to
devm_iio_triggered_buffer_setup() if IIO_TRIGGERED_BUFFER is not
enabled. The original patch [1] had this dependency. But somehow it
didn't make it into the kernel tree. Re-add it.

[1] https://lore.kernel.org/lkml/20200623233011.2319035-3-heiko@sntech.de/

Fixes: 4e130dc7b413 ("iio: adc: rockchip_saradc: Add support iio buffers")
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Heiko Stuebner <heiko.stuebner@theobroma-systems.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/adc/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 66d9cc0731573..d94dc800b8422 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -865,6 +865,8 @@ config ROCKCHIP_SARADC
 	tristate "Rockchip SARADC driver"
 	depends on ARCH_ROCKCHIP || (ARM && COMPILE_TEST)
 	depends on RESET_CONTROLLER
+	select IIO_BUFFER
+	select IIO_TRIGGERED_BUFFER
 	help
 	  Say yes here to build support for the SARADC found in SoCs from
 	  Rockchip.
-- 
GitLab


From 95ad67577de4ea08eb8e441394e698aa4addcc0b Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:37 +0100
Subject: [PATCH 0497/1341] iio: accel: kxsd9: Fix alignment of local buffer.

iio_push_to_buffers_with_timestamp assumes 8 byte alignment which
is not guaranteed by an array of smaller elements.

Note that whilst in this particular case the alignment forcing
of the ts element is not strictly necessary it acts as good
documentation.  Doing this where not necessary should cut
down on the number of cut and paste introduced errors elsewhere.

Fixes: 0427a106a98a ("iio: accel: kxsd9: Add triggered buffer handling")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/accel/kxsd9.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c
index 66b2e4cf24cfa..0e18b92e20992 100644
--- a/drivers/iio/accel/kxsd9.c
+++ b/drivers/iio/accel/kxsd9.c
@@ -209,14 +209,20 @@ static irqreturn_t kxsd9_trigger_handler(int irq, void *p)
 	const struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct kxsd9_state *st = iio_priv(indio_dev);
+	/*
+	 * Ensure correct positioning and alignment of timestamp.
+	 * No need to zero initialize as all elements written.
+	 */
+	struct {
+		__be16 chan[4];
+		s64 ts __aligned(8);
+	} hw_values;
 	int ret;
-	/* 4 * 16bit values AND timestamp */
-	__be16 hw_values[8];
 
 	ret = regmap_bulk_read(st->map,
 			       KXSD9_REG_X,
-			       &hw_values,
-			       8);
+			       hw_values.chan,
+			       sizeof(hw_values.chan));
 	if (ret) {
 		dev_err(st->dev,
 			"error reading data\n");
@@ -224,7 +230,7 @@ static irqreturn_t kxsd9_trigger_handler(int irq, void *p)
 	}
 
 	iio_push_to_buffers_with_timestamp(indio_dev,
-					   hw_values,
+					   &hw_values,
 					   iio_get_time_ns(indio_dev));
 	iio_trigger_notify_done(indio_dev->trig);
 
-- 
GitLab


From 89226a296d816727405d3fea684ef69e7d388bd8 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:38 +0100
Subject: [PATCH 0498/1341] iio:accel:mma8452: Fix timestamp alignment and
 prevent data leak.

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses a 16 byte u8 array on the stack.  As Lars also noted
this anti pattern can involve a leak of data to userspace and that
indeed can happen here.  We close both issues by moving to
a suitable structure in the iio_priv() data with alignment
ensured by use of an explicit c structure.  This data is allocated
with kzalloc so no data can leak appart from previous readings.

The additional forcing of the 8 byte alignment of the timestamp
is not strictly necessary but makes the code less fragile by
making this explicit.

Fixes: c7eeea93ac60 ("iio: Add Freescale MMA8452Q 3-axis accelerometer driver")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/accel/mma8452.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index ba27f86731314..1cf2b5db26ca8 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -110,6 +110,12 @@ struct mma8452_data {
 	int sleep_val;
 	struct regulator *vdd_reg;
 	struct regulator *vddio_reg;
+
+	/* Ensure correct alignment of time stamp when present */
+	struct {
+		__be16 channels[3];
+		s64 ts __aligned(8);
+	} buffer;
 };
 
  /**
@@ -1091,14 +1097,13 @@ static irqreturn_t mma8452_trigger_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct mma8452_data *data = iio_priv(indio_dev);
-	u8 buffer[16]; /* 3 16-bit channels + padding + ts */
 	int ret;
 
-	ret = mma8452_read(data, (__be16 *)buffer);
+	ret = mma8452_read(data, data->buffer.channels);
 	if (ret < 0)
 		goto done;
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buffer,
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->buffer,
 					   iio_get_time_ns(indio_dev));
 
 done:
-- 
GitLab


From a6f86f724394de3629da63fe5e1b7a4ab3396efe Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:39 +0100
Subject: [PATCH 0499/1341] iio:accel:bmc150-accel: Fix timestamp alignment and
 prevent data leak.

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses a 16 byte array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here.  We close both issues by moving
to a suitable structure in the iio_priv() data with alignment
ensured by use of an explicit c structure.  This data is allocated
with kzalloc so no data can leak appart from previous readings.

Fixes tag is beyond some major refactoring so likely manual backporting
would be needed to get that far back.

Whilst the force alignment of the ts is not strictly necessary, it
does make the code less fragile.

Fixes: 3bbec9773389 ("iio: bmc150_accel: add support for hardware fifo")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/accel/bmc150-accel-core.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/accel/bmc150-accel-core.c b/drivers/iio/accel/bmc150-accel-core.c
index 24864d9dfab5d..48435865fdaf3 100644
--- a/drivers/iio/accel/bmc150-accel-core.c
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -189,6 +189,14 @@ struct bmc150_accel_data {
 	struct mutex mutex;
 	u8 fifo_mode, watermark;
 	s16 buffer[8];
+	/*
+	 * Ensure there is sufficient space and correct alignment for
+	 * the timestamp if enabled
+	 */
+	struct {
+		__le16 channels[3];
+		s64 ts __aligned(8);
+	} scan;
 	u8 bw_bits;
 	u32 slope_dur;
 	u32 slope_thres;
@@ -922,15 +930,16 @@ static int __bmc150_accel_fifo_flush(struct iio_dev *indio_dev,
 	 * now.
 	 */
 	for (i = 0; i < count; i++) {
-		u16 sample[8];
 		int j, bit;
 
 		j = 0;
 		for_each_set_bit(bit, indio_dev->active_scan_mask,
 				 indio_dev->masklength)
-			memcpy(&sample[j++], &buffer[i * 3 + bit], 2);
+			memcpy(&data->scan.channels[j++], &buffer[i * 3 + bit],
+			       sizeof(data->scan.channels[0]));
 
-		iio_push_to_buffers_with_timestamp(indio_dev, sample, tstamp);
+		iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+						   tstamp);
 
 		tstamp += sample_period;
 	}
-- 
GitLab


From 7e5ac1f2206eda414f90c698fe1820dee873394d Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:40 +0100
Subject: [PATCH 0500/1341] iio:accel:mma7455: Fix timestamp alignment and
 prevent data leak.

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses a 16 byte u8 array on the stack   As Lars also noted
this anti pattern can involve a leak of data to userspace and that
indeed can happen here.  We close both issues by moving to
a suitable structure in the iio_priv() data with alignment
ensured by use of an explicit c structure.  This data is allocated
with kzalloc so no data can leak appart from previous readings.

The force alignment of ts is not strictly necessary in this particularly
case but does make the code less fragile.

Fixes: a84ef0d181d9 ("iio: accel: add Freescale MMA7455L/MMA7456L 3-axis accelerometer driver")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: <Stable@vger.kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---
 drivers/iio/accel/mma7455_core.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/accel/mma7455_core.c b/drivers/iio/accel/mma7455_core.c
index 7e99bcb3398df..922bd38ff6ea9 100644
--- a/drivers/iio/accel/mma7455_core.c
+++ b/drivers/iio/accel/mma7455_core.c
@@ -52,6 +52,14 @@
 
 struct mma7455_data {
 	struct regmap *regmap;
+	/*
+	 * Used to reorganize data.  Will ensure correct alignment of
+	 * the timestamp if present
+	 */
+	struct {
+		__le16 channels[3];
+		s64 ts __aligned(8);
+	} scan;
 };
 
 static int mma7455_drdy(struct mma7455_data *mma7455)
@@ -82,19 +90,19 @@ static irqreturn_t mma7455_trigger_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct mma7455_data *mma7455 = iio_priv(indio_dev);
-	u8 buf[16]; /* 3 x 16-bit channels + padding + ts */
 	int ret;
 
 	ret = mma7455_drdy(mma7455);
 	if (ret)
 		goto done;
 
-	ret = regmap_bulk_read(mma7455->regmap, MMA7455_REG_XOUTL, buf,
-			       sizeof(__le16) * 3);
+	ret = regmap_bulk_read(mma7455->regmap, MMA7455_REG_XOUTL,
+			       mma7455->scan.channels,
+			       sizeof(mma7455->scan.channels));
 	if (ret)
 		goto done;
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buf,
+	iio_push_to_buffers_with_timestamp(indio_dev, &mma7455->scan,
 					   iio_get_time_ns(indio_dev));
 
 done:
-- 
GitLab


From f60e8bb84282b8e633956cfe74b4f0d64ca73cec Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:42 +0100
Subject: [PATCH 0501/1341] iio:proximity:mb1232: Fix timestamp alignment and
 prevent data leak.

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses a 16 byte s16 array on the stack   As Lars also noted
this anti pattern can involve a leak of data to userspace and that
indeed can happen here.  We close both issues by moving to
a suitable structure in the iio_priv() data with alignment
ensured by use of an explicit c structure.  This data is allocated
with kzalloc so no data can leak appart from previous readings.

In this case the forced alignment of the ts is necessary to ensure
correct padding on x86_32 where the s64 would only be 4 byte aligned.

Fixes: 16b05261537e ("mb1232.c: add distance iio sensor with i2c")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Andreas Klinger <ak@it-klinger.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: <Stable@vger.kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---
 drivers/iio/proximity/mb1232.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/proximity/mb1232.c b/drivers/iio/proximity/mb1232.c
index 654564c452489..ad4b1fb2607aa 100644
--- a/drivers/iio/proximity/mb1232.c
+++ b/drivers/iio/proximity/mb1232.c
@@ -40,6 +40,11 @@ struct mb1232_data {
 	 */
 	struct completion	ranging;
 	int			irqnr;
+	/* Ensure correct alignment of data to push to IIO buffer */
+	struct {
+		s16 distance;
+		s64 ts __aligned(8);
+	} scan;
 };
 
 static irqreturn_t mb1232_handle_irq(int irq, void *dev_id)
@@ -113,17 +118,13 @@ static irqreturn_t mb1232_trigger_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct mb1232_data *data = iio_priv(indio_dev);
-	/*
-	 * triggered buffer
-	 * 16-bit channel + 48-bit padding + 64-bit timestamp
-	 */
-	s16 buffer[8] = { 0 };
 
-	buffer[0] = mb1232_read_distance(data);
-	if (buffer[0] < 0)
+	data->scan.distance = mb1232_read_distance(data);
+	if (data->scan.distance < 0)
 		goto err;
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buffer, pf->timestamp);
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
+					   pf->timestamp);
 
 err:
 	iio_trigger_notify_done(indio_dev->trig);
-- 
GitLab


From eb1a148ef41d8ae8d9201efc3f1b145976290331 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:43 +0100
Subject: [PATCH 0502/1341] iio:chemical:ccs811: Fix timestamp alignment and
 prevent data leak.

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses an array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here.  We close both issues by
moving to a suitable structure in the iio_priv() data with alignment
explicitly requested.  This data is allocated with kzalloc so no
data can leak appart from previous readings.

The explicit alignment of ts is necessary to ensure consistent
padding for x86_32 in which the ts would otherwise be 4 byte aligned.

Fixes: 283d26917ad6 ("iio: chemical: ccs811: Add triggered buffer support")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/chemical/ccs811.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/chemical/ccs811.c b/drivers/iio/chemical/ccs811.c
index 2b007e7568b21..60dd87e96f5f8 100644
--- a/drivers/iio/chemical/ccs811.c
+++ b/drivers/iio/chemical/ccs811.c
@@ -78,6 +78,11 @@ struct ccs811_data {
 	struct iio_trigger *drdy_trig;
 	struct gpio_desc *wakeup_gpio;
 	bool drdy_trig_on;
+	/* Ensures correct alignment of timestamp if present */
+	struct {
+		s16 channels[2];
+		s64 ts __aligned(8);
+	} scan;
 };
 
 static const struct iio_chan_spec ccs811_channels[] = {
@@ -327,17 +332,17 @@ static irqreturn_t ccs811_trigger_handler(int irq, void *p)
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct ccs811_data *data = iio_priv(indio_dev);
 	struct i2c_client *client = data->client;
-	s16 buf[8]; /* s16 eCO2 + s16 TVOC + padding + 8 byte timestamp */
 	int ret;
 
-	ret = i2c_smbus_read_i2c_block_data(client, CCS811_ALG_RESULT_DATA, 4,
-					    (u8 *)&buf);
+	ret = i2c_smbus_read_i2c_block_data(client, CCS811_ALG_RESULT_DATA,
+					    sizeof(data->scan.channels),
+					    (u8 *)data->scan.channels);
 	if (ret != 4) {
 		dev_err(&client->dev, "cannot read sensor data\n");
 		goto err;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buf,
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
 					   iio_get_time_ns(indio_dev));
 
 err:
-- 
GitLab


From 523628852a5f5f34a15252b2634d0498d3cfb347 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:45 +0100
Subject: [PATCH 0503/1341] iio:light:max44000 Fix timestamp alignment and
 prevent data leak.

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses a 16 byte array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here.  We close both issues by
moving to a suitable structure in the iio_priv().
This data is allocated with kzalloc so no data can leak appart
from previous readings.

It is necessary to force the alignment of ts to avoid the padding
on x86_32 being different from 64 bit platorms (it alows for
4 bytes aligned 8 byte types.

Fixes: 06ad7ea10e2b ("max44000: Initial triggered buffer support")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/light/max44000.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/light/max44000.c b/drivers/iio/light/max44000.c
index aa8ed1e3e89a5..b8e721bced5ba 100644
--- a/drivers/iio/light/max44000.c
+++ b/drivers/iio/light/max44000.c
@@ -75,6 +75,11 @@
 struct max44000_data {
 	struct mutex lock;
 	struct regmap *regmap;
+	/* Ensure naturally aligned timestamp */
+	struct {
+		u16 channels[2];
+		s64 ts __aligned(8);
+	} scan;
 };
 
 /* Default scale is set to the minimum of 0.03125 or 1 / (1 << 5) lux */
@@ -488,7 +493,6 @@ static irqreturn_t max44000_trigger_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct max44000_data *data = iio_priv(indio_dev);
-	u16 buf[8]; /* 2x u16 + padding + 8 bytes timestamp */
 	int index = 0;
 	unsigned int regval;
 	int ret;
@@ -498,17 +502,17 @@ static irqreturn_t max44000_trigger_handler(int irq, void *p)
 		ret = max44000_read_alsval(data);
 		if (ret < 0)
 			goto out_unlock;
-		buf[index++] = ret;
+		data->scan.channels[index++] = ret;
 	}
 	if (test_bit(MAX44000_SCAN_INDEX_PRX, indio_dev->active_scan_mask)) {
 		ret = regmap_read(data->regmap, MAX44000_REG_PRX_DATA, &regval);
 		if (ret < 0)
 			goto out_unlock;
-		buf[index] = regval;
+		data->scan.channels[index] = regval;
 	}
 	mutex_unlock(&data->lock);
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buf,
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
 					   iio_get_time_ns(indio_dev));
 	iio_trigger_notify_done(indio_dev->trig);
 	return IRQ_HANDLED;
-- 
GitLab


From 2684d5003490df5398aeafe2592ba9d4a4653998 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:48 +0100
Subject: [PATCH 0504/1341] iio:light:ltr501 Fix timestamp alignment issue.

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses an array of smaller elements on the stack.
Here we use a structure on the stack.  The driver already did an
explicit memset so no data leak was possible.

Forced alignment of ts is not strictly necessary but probably makes
the code slightly less fragile.

Note there has been some rework in this driver of the years, so no
way this will apply cleanly all the way back.

Fixes: 2690be905123 ("iio: Add Lite-On ltr501 ambient light / proximity sensor driver")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/light/ltr501.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
index 4bac0646398d5..b4323d2db0b19 100644
--- a/drivers/iio/light/ltr501.c
+++ b/drivers/iio/light/ltr501.c
@@ -1243,13 +1243,16 @@ static irqreturn_t ltr501_trigger_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct ltr501_data *data = iio_priv(indio_dev);
-	u16 buf[8];
+	struct {
+		u16 channels[3];
+		s64 ts __aligned(8);
+	} scan;
 	__le16 als_buf[2];
 	u8 mask = 0;
 	int j = 0;
 	int ret, psdata;
 
-	memset(buf, 0, sizeof(buf));
+	memset(&scan, 0, sizeof(scan));
 
 	/* figure out which data needs to be ready */
 	if (test_bit(0, indio_dev->active_scan_mask) ||
@@ -1268,9 +1271,9 @@ static irqreturn_t ltr501_trigger_handler(int irq, void *p)
 		if (ret < 0)
 			return ret;
 		if (test_bit(0, indio_dev->active_scan_mask))
-			buf[j++] = le16_to_cpu(als_buf[1]);
+			scan.channels[j++] = le16_to_cpu(als_buf[1]);
 		if (test_bit(1, indio_dev->active_scan_mask))
-			buf[j++] = le16_to_cpu(als_buf[0]);
+			scan.channels[j++] = le16_to_cpu(als_buf[0]);
 	}
 
 	if (mask & LTR501_STATUS_PS_RDY) {
@@ -1278,10 +1281,10 @@ static irqreturn_t ltr501_trigger_handler(int irq, void *p)
 				       &psdata, 2);
 		if (ret < 0)
 			goto done;
-		buf[j++] = psdata & LTR501_PS_DATA_MASK;
+		scan.channels[j++] = psdata & LTR501_PS_DATA_MASK;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buf,
+	iio_push_to_buffers_with_timestamp(indio_dev, &scan,
 					   iio_get_time_ns(indio_dev));
 
 done:
-- 
GitLab


From 02ad21cefbac4d89ac443866f25b90449527737b Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:49 +0100
Subject: [PATCH 0505/1341] iio:magnetometer:ak8975 Fix alignment and data leak
 issues.

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses an array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here.  We close both issues by
moving to a suitable structure in the iio_priv() data.

This data is allocated with kzalloc so no data can leak apart from
previous readings.

The explicit alignment of ts is not necessary in this case as by
coincidence the padding will end up the same, however I consider
it to make the code less fragile and have included it.

Fixes: bc11ca4a0b84 ("iio:magnetometer:ak8975: triggered buffer support")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Gregor Boirie <gregor.boirie@parrot.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/magnetometer/ak8975.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/magnetometer/ak8975.c b/drivers/iio/magnetometer/ak8975.c
index 03d71f7961772..623766ff800b6 100644
--- a/drivers/iio/magnetometer/ak8975.c
+++ b/drivers/iio/magnetometer/ak8975.c
@@ -366,6 +366,12 @@ struct ak8975_data {
 	struct iio_mount_matrix orientation;
 	struct regulator	*vdd;
 	struct regulator	*vid;
+
+	/* Ensure natural alignment of timestamp */
+	struct {
+		s16 channels[3];
+		s64 ts __aligned(8);
+	} scan;
 };
 
 /* Enable attached power regulator if any. */
@@ -793,7 +799,6 @@ static void ak8975_fill_buffer(struct iio_dev *indio_dev)
 	const struct i2c_client *client = data->client;
 	const struct ak_def *def = data->def;
 	int ret;
-	s16 buff[8]; /* 3 x 16 bits axis values + 1 aligned 64 bits timestamp */
 	__le16 fval[3];
 
 	mutex_lock(&data->lock);
@@ -816,12 +821,13 @@ static void ak8975_fill_buffer(struct iio_dev *indio_dev)
 	mutex_unlock(&data->lock);
 
 	/* Clamp to valid range. */
-	buff[0] = clamp_t(s16, le16_to_cpu(fval[0]), -def->range, def->range);
-	buff[1] = clamp_t(s16, le16_to_cpu(fval[1]), -def->range, def->range);
-	buff[2] = clamp_t(s16, le16_to_cpu(fval[2]), -def->range, def->range);
+	data->scan.channels[0] = clamp_t(s16, le16_to_cpu(fval[0]), -def->range, def->range);
+	data->scan.channels[1] = clamp_t(s16, le16_to_cpu(fval[1]), -def->range, def->range);
+	data->scan.channels[2] = clamp_t(s16, le16_to_cpu(fval[2]), -def->range, def->range);
 
-	iio_push_to_buffers_with_timestamp(indio_dev, buff,
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
 					   iio_get_time_ns(indio_dev));
+
 	return;
 
 unlock:
-- 
GitLab


From deb6323b739c54e1a1e83cd3a2bae4901e3eebf6 Mon Sep 17 00:00:00 2001
From: Anson Huang <Anson.Huang@nxp.com>
Date: Mon, 3 Aug 2020 16:01:24 +0800
Subject: [PATCH 0506/1341] ARM: dts: imx7ulp: Correct gpio ranges

Correct gpio ranges according to i.MX7ULP pinctrl driver:

gpio_ptc: ONLY pin 0~19 are available;
gpio_ptd: ONLY pin 0~11 are available;
gpio_pte: ONLY pin 0~15 are available;
gpio_ptf: ONLY pin 0~19 are available;

Fixes: 20434dc92c05 ("ARM: dts: imx: add common imx7ulp dtsi support")
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/imx7ulp.dtsi | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/imx7ulp.dtsi b/arch/arm/boot/dts/imx7ulp.dtsi
index 367439639da91..b7ea37ad4e55c 100644
--- a/arch/arm/boot/dts/imx7ulp.dtsi
+++ b/arch/arm/boot/dts/imx7ulp.dtsi
@@ -394,7 +394,7 @@ gpio_ptc: gpio@40ae0000 {
 			clocks = <&pcc2 IMX7ULP_CLK_RGPIO2P1>,
 				 <&pcc3 IMX7ULP_CLK_PCTLC>;
 			clock-names = "gpio", "port";
-			gpio-ranges = <&iomuxc1 0 0 32>;
+			gpio-ranges = <&iomuxc1 0 0 20>;
 		};
 
 		gpio_ptd: gpio@40af0000 {
@@ -408,7 +408,7 @@ gpio_ptd: gpio@40af0000 {
 			clocks = <&pcc2 IMX7ULP_CLK_RGPIO2P1>,
 				 <&pcc3 IMX7ULP_CLK_PCTLD>;
 			clock-names = "gpio", "port";
-			gpio-ranges = <&iomuxc1 0 32 32>;
+			gpio-ranges = <&iomuxc1 0 32 12>;
 		};
 
 		gpio_pte: gpio@40b00000 {
@@ -422,7 +422,7 @@ gpio_pte: gpio@40b00000 {
 			clocks = <&pcc2 IMX7ULP_CLK_RGPIO2P1>,
 				 <&pcc3 IMX7ULP_CLK_PCTLE>;
 			clock-names = "gpio", "port";
-			gpio-ranges = <&iomuxc1 0 64 32>;
+			gpio-ranges = <&iomuxc1 0 64 16>;
 		};
 
 		gpio_ptf: gpio@40b10000 {
@@ -436,7 +436,7 @@ gpio_ptf: gpio@40b10000 {
 			clocks = <&pcc2 IMX7ULP_CLK_RGPIO2P1>,
 				 <&pcc3 IMX7ULP_CLK_PCTLF>;
 			clock-names = "gpio", "port";
-			gpio-ranges = <&iomuxc1 0 96 32>;
+			gpio-ranges = <&iomuxc1 0 96 20>;
 		};
 	};
 
-- 
GitLab


From f5749d6181fa7df5ae741788e5d96f593d3a60b6 Mon Sep 17 00:00:00 2001
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Date: Thu, 20 Aug 2020 12:36:22 +0300
Subject: [PATCH 0507/1341] drm/msm/a6xx: fix gmu start on newer firmware

New Qualcomm firmware has changed a way it reports back the 'started'
event. Support new register values.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 5b2df7d481386..b3b5047bb7e77 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -200,6 +200,16 @@ static int a6xx_gmu_start(struct a6xx_gmu *gmu)
 {
 	int ret;
 	u32 val;
+	u32 mask, reset_val;
+
+	val = gmu_read(gmu, REG_A6XX_GMU_CM3_DTCM_START + 0xff8);
+	if (val <= 0x20010004) {
+		mask = 0xffffffff;
+		reset_val = 0xbabeface;
+	} else {
+		mask = 0x1ff;
+		reset_val = 0x100;
+	}
 
 	gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);
 
@@ -211,7 +221,7 @@ static int a6xx_gmu_start(struct a6xx_gmu *gmu)
 	gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 0);
 
 	ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, val,
-		val == 0xbabeface, 100, 10000);
+		(val & mask) == reset_val, 100, 10000);
 
 	if (ret)
 		DRM_DEV_ERROR(gmu->dev, "GMU firmware initialization timed out\n");
-- 
GitLab


From f74cacf5d2bf71c2b415dbb9f100f2c705ad5182 Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@chromium.org>
Date: Sat, 8 Aug 2020 10:29:11 -0700
Subject: [PATCH 0508/1341] drm/msm/a6xx: fix crashdec section name typo

Backport note: maybe wait some time for the crashdec MR[1] to look for
both the old typo'd name and the corrected name to land in mesa 20.2

[1] https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6242

Fixes: 1707add81551 ("drm/msm/a6xx: Add a6xx gpu state")
Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h
index 846fd5b54c230..2fb58b7098e4b 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.h
@@ -372,7 +372,7 @@ static const struct a6xx_indexed_registers {
 	u32 data;
 	u32 count;
 } a6xx_indexed_reglist[] = {
-	{ "CP_SEQ_STAT", REG_A6XX_CP_SQE_STAT_ADDR,
+	{ "CP_SQE_STAT", REG_A6XX_CP_SQE_STAT_ADDR,
 		REG_A6XX_CP_SQE_STAT_DATA, 0x33 },
 	{ "CP_DRAW_STATE", REG_A6XX_CP_DRAW_STATE_ADDR,
 		REG_A6XX_CP_DRAW_STATE_DATA, 0x100 },
-- 
GitLab


From 6f7cd6e40b94d498049c1a8664c15bf5863ae578 Mon Sep 17 00:00:00 2001
From: Rob Clark <robdclark@chromium.org>
Date: Tue, 11 Aug 2020 16:36:57 -0700
Subject: [PATCH 0509/1341] drm/msm/a6xx: add module param to enable debugbus
 snapshot

For production devices, the debugbus sections will typically be fused
off and empty in the gpu device coredump.  But since this may contain
data like cache contents, don't capture it by default.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c | 3 ++-
 drivers/gpu/drm/msm/adreno/adreno_device.c  | 4 ++++
 drivers/gpu/drm/msm/adreno/adreno_gpu.h     | 2 ++
 3 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
index 959656ad69871..b12f5b4a1bea9 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c
@@ -938,7 +938,8 @@ struct msm_gpu_state *a6xx_gpu_state_get(struct msm_gpu *gpu)
 		msm_gem_kernel_put(dumper.bo, gpu->aspace, true);
 	}
 
-	a6xx_get_debugbus(gpu, a6xx_state);
+	if (snapshot_debugbus)
+		a6xx_get_debugbus(gpu, a6xx_state);
 
 	return  &a6xx_state->base;
 }
diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
index 4e84f3c76f4f5..9eeb46bf2a5dc 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_device.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
@@ -14,6 +14,10 @@ bool hang_debug = false;
 MODULE_PARM_DESC(hang_debug, "Dump registers when hang is detected (can be slow!)");
 module_param_named(hang_debug, hang_debug, bool, 0600);
 
+bool snapshot_debugbus = false;
+MODULE_PARM_DESC(snapshot_debugbus, "Include debugbus sections in GPU devcoredump (if not fused off)");
+module_param_named(snapshot_debugbus, snapshot_debugbus, bool, 0600);
+
 static const struct adreno_info gpulist[] = {
 	{
 		.rev   = ADRENO_REV(2, 0, 0, 0),
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
index 99bb468f5f245..e55abae365b5a 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
@@ -21,6 +21,8 @@
 #define REG_SKIP ~0
 #define REG_ADRENO_SKIP(_offset) [_offset] = REG_SKIP
 
+extern bool snapshot_debugbus;
+
 /**
  * adreno_regs: List of registers that are used in across all
  * 3D devices. Each device type has different offset value for the same
-- 
GitLab


From 5e0c22d4a9ddae4e784a3e171b9d3d452b37aeb2 Mon Sep 17 00:00:00 2001
From: Jonathan Marek <jonathan@marek.ca>
Date: Thu, 13 Aug 2020 14:54:48 -0400
Subject: [PATCH 0510/1341] drm/msm/a6xx: fix frequency not always being
 restored on GMU resume

The patch reorganizing the set_freq function made it so the gmu resume
doesn't always set the frequency, because a6xx_gmu_set_freq() exits early
when the frequency hasn't been changed. Note this always happens when
resuming GMU after recovering from a hang.

Use a simple workaround to prevent this from happening.

Fixes: 1f60d11423db ("drm: msm: a6xx: send opp instead of a frequency")
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index b3b5047bb7e77..46a29e383bfd1 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -851,6 +851,7 @@ static void a6xx_gmu_set_initial_freq(struct msm_gpu *gpu, struct a6xx_gmu *gmu)
 	if (IS_ERR_OR_NULL(gpu_opp))
 		return;
 
+	gmu->freq = 0; /* so a6xx_gmu_set_freq() doesn't exit early */
 	a6xx_gmu_set_freq(gpu, gpu_opp);
 	dev_pm_opp_put(gpu_opp);
 }
-- 
GitLab


From eeaac3634ee0e3f35548be35275efeca888e9b23 Mon Sep 17 00:00:00 2001
From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Date: Sat, 22 Aug 2020 15:06:36 +0300
Subject: [PATCH 0511/1341] net: nexthop: don't allow empty NHA_GROUP

Currently the nexthop code will use an empty NHA_GROUP attribute, but it
requires at least 1 entry in order to function properly. Otherwise we
end up derefencing null or random pointers all over the place due to not
having any nh_grp_entry members allocated, nexthop code relies on having at
least the first member present. Empty NHA_GROUP doesn't make any sense so
just disallow it.
Also add a WARN_ON for any future users of nexthop_create_group().

 BUG: kernel NULL pointer dereference, address: 0000000000000080
 #PF: supervisor read access in kernel mode
 #PF: error_code(0x0000) - not-present page
 PGD 0 P4D 0
 Oops: 0000 [#1] SMP
 CPU: 0 PID: 558 Comm: ip Not tainted 5.9.0-rc1+ #93
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-2.fc32 04/01/2014
 RIP: 0010:fib_check_nexthop+0x4a/0xaa
 Code: 0f 84 83 00 00 00 48 c7 02 80 03 f7 81 c3 40 80 fe fe 75 12 b8 ea ff ff ff 48 85 d2 74 6b 48 c7 02 40 03 f7 81 c3 48 8b 40 10 <48> 8b 80 80 00 00 00 eb 36 80 78 1a 00 74 12 b8 ea ff ff ff 48 85
 RSP: 0018:ffff88807983ba00 EFLAGS: 00010213
 RAX: 0000000000000000 RBX: ffff88807983bc00 RCX: 0000000000000000
 RDX: ffff88807983bc00 RSI: 0000000000000000 RDI: ffff88807bdd0a80
 RBP: ffff88807983baf8 R08: 0000000000000dc0 R09: 000000000000040a
 R10: 0000000000000000 R11: ffff88807bdd0ae8 R12: 0000000000000000
 R13: 0000000000000000 R14: ffff88807bea3100 R15: 0000000000000001
 FS:  00007f10db393700(0000) GS:ffff88807dc00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000080 CR3: 000000007bd0f004 CR4: 00000000003706f0
 Call Trace:
  fib_create_info+0x64d/0xaf7
  fib_table_insert+0xf6/0x581
  ? __vma_adjust+0x3b6/0x4d4
  inet_rtm_newroute+0x56/0x70
  rtnetlink_rcv_msg+0x1e3/0x20d
  ? rtnl_calcit.isra.0+0xb8/0xb8
  netlink_rcv_skb+0x5b/0xac
  netlink_unicast+0xfa/0x17b
  netlink_sendmsg+0x334/0x353
  sock_sendmsg_nosec+0xf/0x3f
  ____sys_sendmsg+0x1a0/0x1fc
  ? copy_msghdr_from_user+0x4c/0x61
  ___sys_sendmsg+0x63/0x84
  ? handle_mm_fault+0xa39/0x11b5
  ? sockfd_lookup_light+0x72/0x9a
  __sys_sendmsg+0x50/0x6e
  do_syscall_64+0x54/0xbe
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 RIP: 0033:0x7f10dacc0bb7
 Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb cd 66 0f 1f 44 00 00 8b 05 9a 4b 2b 00 85 c0 75 2e 48 63 ff 48 63 d2 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 8b 15 b1 f2 2a 00 f7 d8 64 89 02 48
 RSP: 002b:00007ffcbe628bf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
 RAX: ffffffffffffffda RBX: 00007ffcbe628f80 RCX: 00007f10dacc0bb7
 RDX: 0000000000000000 RSI: 00007ffcbe628c60 RDI: 0000000000000003
 RBP: 000000005f41099c R08: 0000000000000001 R09: 0000000000000008
 R10: 00000000000005e9 R11: 0000000000000246 R12: 0000000000000000
 R13: 0000000000000000 R14: 00007ffcbe628d70 R15: 0000563a86c6e440
 Modules linked in:
 CR2: 0000000000000080

CC: David Ahern <dsahern@gmail.com>
Fixes: 430a049190de ("nexthop: Add support for nexthop groups")
Reported-by: syzbot+a61aa19b0c14c8770bd9@syzkaller.appspotmail.com
Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ipv4/nexthop.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
index cc8049b100b24..134e923822750 100644
--- a/net/ipv4/nexthop.c
+++ b/net/ipv4/nexthop.c
@@ -446,7 +446,7 @@ static int nh_check_attr_group(struct net *net, struct nlattr *tb[],
 	unsigned int i, j;
 	u8 nhg_fdb = 0;
 
-	if (len & (sizeof(struct nexthop_grp) - 1)) {
+	if (!len || len & (sizeof(struct nexthop_grp) - 1)) {
 		NL_SET_ERR_MSG(extack,
 			       "Invalid length for nexthop group attribute");
 		return -EINVAL;
@@ -1187,6 +1187,9 @@ static struct nexthop *nexthop_create_group(struct net *net,
 	struct nexthop *nh;
 	int i;
 
+	if (WARN_ON(!num_nh))
+		return ERR_PTR(-EINVAL);
+
 	nh = nexthop_alloc();
 	if (!nh)
 		return ERR_PTR(-ENOMEM);
-- 
GitLab


From a9ed4a6560b8562b7e2e2bed9527e88001f7b682 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Wed, 19 Aug 2020 17:12:17 +0100
Subject: [PATCH 0512/1341] epoll: Keep a reference on files added to the check
 list

When adding a new fd to an epoll, and that this new fd is an
epoll fd itself, we recursively scan the fds attached to it
to detect cycles, and add non-epool files to a "check list"
that gets subsequently parsed.

However, this check list isn't completely safe when deletions
can happen concurrently. To sidestep the issue, make sure that
a struct file placed on the check list sees its f_count increased,
ensuring that a concurrent deletion won't result in the file
disapearing from under our feet.

Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/eventpoll.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 12eebcdea9c8a..196003d9242c6 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1994,9 +1994,11 @@ static int ep_loop_check_proc(void *priv, void *cookie, int call_nests)
 			 * not already there, and calling reverse_path_check()
 			 * during ep_insert().
 			 */
-			if (list_empty(&epi->ffd.file->f_tfile_llink))
+			if (list_empty(&epi->ffd.file->f_tfile_llink)) {
+				get_file(epi->ffd.file);
 				list_add(&epi->ffd.file->f_tfile_llink,
 					 &tfile_check_list);
+			}
 		}
 	}
 	mutex_unlock(&ep->mtx);
@@ -2040,6 +2042,7 @@ static void clear_tfile_check_list(void)
 		file = list_first_entry(&tfile_check_list, struct file,
 					f_tfile_llink);
 		list_del_init(&file->f_tfile_llink);
+		fput(file);
 	}
 	INIT_LIST_HEAD(&tfile_check_list);
 }
@@ -2204,13 +2207,17 @@ int do_epoll_ctl(int epfd, int op, int fd, struct epoll_event *epds,
 					clear_tfile_check_list();
 					goto error_tgt_fput;
 				}
-			} else
+			} else {
+				get_file(tf.file);
 				list_add(&tf.file->f_tfile_llink,
 							&tfile_check_list);
+			}
 			error = epoll_mutex_lock(&ep->mtx, 0, nonblock);
 			if (error) {
 out_del:
 				list_del(&tf.file->f_tfile_llink);
+				if (!is_file_epoll(tf.file))
+					fput(tf.file);
 				goto error_tgt_fput;
 			}
 			if (is_file_epoll(tf.file)) {
-- 
GitLab


From 52c479697c9b73f628140dcdfcd39ea302d05482 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 22 Aug 2020 18:25:52 -0400
Subject: [PATCH 0513/1341] do_epoll_ctl(): clean the failure exits up a bit

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/eventpoll.c | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 196003d9242c6..e0decff22ae27 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -2203,29 +2203,22 @@ int do_epoll_ctl(int epfd, int op, int fd, struct epoll_event *epds,
 			full_check = 1;
 			if (is_file_epoll(tf.file)) {
 				error = -ELOOP;
-				if (ep_loop_check(ep, tf.file) != 0) {
-					clear_tfile_check_list();
+				if (ep_loop_check(ep, tf.file) != 0)
 					goto error_tgt_fput;
-				}
 			} else {
 				get_file(tf.file);
 				list_add(&tf.file->f_tfile_llink,
 							&tfile_check_list);
 			}
 			error = epoll_mutex_lock(&ep->mtx, 0, nonblock);
-			if (error) {
-out_del:
-				list_del(&tf.file->f_tfile_llink);
-				if (!is_file_epoll(tf.file))
-					fput(tf.file);
+			if (error)
 				goto error_tgt_fput;
-			}
 			if (is_file_epoll(tf.file)) {
 				tep = tf.file->private_data;
 				error = epoll_mutex_lock(&tep->mtx, 1, nonblock);
 				if (error) {
 					mutex_unlock(&ep->mtx);
-					goto out_del;
+					goto error_tgt_fput;
 				}
 			}
 		}
@@ -2246,8 +2239,6 @@ int do_epoll_ctl(int epfd, int op, int fd, struct epoll_event *epds,
 			error = ep_insert(ep, epds, tf.file, fd, full_check);
 		} else
 			error = -EEXIST;
-		if (full_check)
-			clear_tfile_check_list();
 		break;
 	case EPOLL_CTL_DEL:
 		if (epi)
@@ -2270,8 +2261,10 @@ int do_epoll_ctl(int epfd, int op, int fd, struct epoll_event *epds,
 	mutex_unlock(&ep->mtx);
 
 error_tgt_fput:
-	if (full_check)
+	if (full_check) {
+		clear_tfile_check_list();
 		mutex_unlock(&epmutex);
+	}
 
 	fdput(tf);
 error_fput:
-- 
GitLab


From 140a1dc5aea1648258bd9a5e6186331199212079 Mon Sep 17 00:00:00 2001
From: Fabio Estevam <festevam@gmail.com>
Date: Mon, 17 Aug 2020 15:01:42 -0300
Subject: [PATCH 0514/1341] ARM: dts: imx6qdl-gw51xx: Remove unneeded
 #address-cells/#size-cells

The following dtc warning is seen when building with W=1:

arch/arm/boot/dts/imx6qdl-gw51xx.dtsi:23.12-68.4: Warning (avoid_unnecessary_addr_size): /gpio-keys: unnecessary #address-cells/#size-cells without "ranges" or child "reg" property

Remove the unneeded #address-cells/#size-cells properties to fix the issue.

Fixes: 64bf0a0af18d ("ARM: dts: imx6qdl-gw: add Gateworks System Controller support")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/imx6qdl-gw51xx.dtsi | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/arm/boot/dts/imx6qdl-gw51xx.dtsi b/arch/arm/boot/dts/imx6qdl-gw51xx.dtsi
index 7705285d9e3c7..4d01c3300b975 100644
--- a/arch/arm/boot/dts/imx6qdl-gw51xx.dtsi
+++ b/arch/arm/boot/dts/imx6qdl-gw51xx.dtsi
@@ -22,8 +22,6 @@ chosen {
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
 		user-pb {
 			label = "user_pb";
-- 
GitLab


From ecc1aebe3436a3a97b42f7542f7b30a7a3cd1dc5 Mon Sep 17 00:00:00 2001
From: Fabio Estevam <festevam@gmail.com>
Date: Mon, 17 Aug 2020 15:01:43 -0300
Subject: [PATCH 0515/1341] ARM: dts: imx6q-prtwd2: Remove unneeded i2c unit
 name

The following dtc warning is seen when building with W=1:

arch/arm/boot/dts/imx6q-prtwd2.dts:33.8-43.4: Warning (unit_address_vs_reg): /i2c@4: node has a unit name, but no reg or ranges property

Remove the unneeded i2c unit name to fix the issue.

Fixes: 88010b8174ab ("ARM: dts: add Protonic WD2 board")
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/imx6q-prtwd2.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6q-prtwd2.dts b/arch/arm/boot/dts/imx6q-prtwd2.dts
index dffafbcaa7af3..349959d380200 100644
--- a/arch/arm/boot/dts/imx6q-prtwd2.dts
+++ b/arch/arm/boot/dts/imx6q-prtwd2.dts
@@ -30,7 +30,7 @@ usdhc2_wifi_pwrseq: usdhc2_wifi_pwrseq {
 	};
 
 	/* PRTWD2 rev 1 bitbang I2C for Ethernet Switch */
-	i2c@4 {
+	i2c {
 		compatible = "i2c-gpio";
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_i2c4>;
-- 
GitLab


From 56e79dfd036b538940227fb31371c1cd67b2467f Mon Sep 17 00:00:00 2001
From: Rob Herring <robh@kernel.org>
Date: Tue, 18 Aug 2020 14:25:31 -0600
Subject: [PATCH 0516/1341] arm64: dts: imx: Add missing imx8mm-beacon-kit.dtb
 to build

The imx8mm-beacon-kit.dtb was never added to dtbs-y and wasn't getting
built. Fix it.

Fixes: 593816fa2f35 ("arm64: dts: imx: Add Beacon i.MX8m-Mini development kit")
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: NXP Linux Team <linux-imx@nxp.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm64/boot/dts/freescale/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
index a39f0a1723e02..903c0eb61290d 100644
--- a/arch/arm64/boot/dts/freescale/Makefile
+++ b/arch/arm64/boot/dts/freescale/Makefile
@@ -28,6 +28,7 @@ dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-lx2160a-honeycomb.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-lx2160a-qds.dtb
 dtb-$(CONFIG_ARCH_LAYERSCAPE) += fsl-lx2160a-rdb.dtb
 
+dtb-$(CONFIG_ARCH_MXC) += imx8mm-beacon-kit.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mm-evk.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mn-evk.dtb
 dtb-$(CONFIG_ARCH_MXC) += imx8mn-ddr4-evk.dtb
-- 
GitLab


From c5e46066b23dbbb4228fbdc3de66a27ddc8b8a36 Mon Sep 17 00:00:00 2001
From: Adam Ford <aford173@gmail.com>
Date: Wed, 19 Aug 2020 14:59:44 -0500
Subject: [PATCH 0517/1341] ARM: dts: imx6q-logicpd: Fix broken PWM

The DTC doesn't like the default PWM settings, because it's expecting
three cells.  This patch reduces adds the extra entry of 0 to the PWM
reference.

Fixes:  fa28d8212ede ("ARM: dts: imx: default to #pwm-cells = <3> in the SoC dtsi files")
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/imx6q-logicpd.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6q-logicpd.dts b/arch/arm/boot/dts/imx6q-logicpd.dts
index 7a3d1d3e54a94..8f94364ba4847 100644
--- a/arch/arm/boot/dts/imx6q-logicpd.dts
+++ b/arch/arm/boot/dts/imx6q-logicpd.dts
@@ -13,7 +13,7 @@ / {
 
 	backlight: backlight-lvds {
 		compatible = "pwm-backlight";
-		pwms = <&pwm3 0 20000>;
+		pwms = <&pwm3 0 20000 0>;
 		brightness-levels = <0 4 8 16 32 64 128 255>;
 		default-brightness-level = <6>;
 		power-supply = <&reg_lcd>;
-- 
GitLab


From 2a6838d54128952ace6f0ca166dd8706abe46649 Mon Sep 17 00:00:00 2001
From: Chris Healy <cphealy@gmail.com>
Date: Fri, 21 Aug 2020 14:21:02 -0700
Subject: [PATCH 0518/1341] ARM: dts: vfxxx: Add syscon compatible with OCOTP

Add syscon compatibility with Vybrid OCOTP node. This is required to
access the UID.

Fixes: fa8d20c8dbb77 ("ARM: dts: vfxxx: Add node corresponding to OCOTP")
Cc: stable@vger.kernel.org
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/vfxxx.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/vfxxx.dtsi b/arch/arm/boot/dts/vfxxx.dtsi
index 0fe03aa0367f2..2259d11af721e 100644
--- a/arch/arm/boot/dts/vfxxx.dtsi
+++ b/arch/arm/boot/dts/vfxxx.dtsi
@@ -495,7 +495,7 @@ edma1: dma-controller@40098000 {
 			};
 
 			ocotp: ocotp@400a5000 {
-				compatible = "fsl,vf610-ocotp";
+				compatible = "fsl,vf610-ocotp", "syscon";
 				reg = <0x400a5000 0x1000>;
 				clocks = <&clks VF610_CLK_OCOTP>;
 			};
-- 
GitLab


From 0bd8bce897b6697bbc286b8ba473aa0705fe394b Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Sun, 23 Aug 2020 16:55:37 +0900
Subject: [PATCH 0519/1341] ALSA; firewire-tascam: exclude Tascam FE-8 from
 detection

Tascam FE-8 is known to support communication by asynchronous transaction
only. The support can be implemented in userspace application and
snd-firewire-ctl-services project has the support. However, ALSA
firewire-tascam driver is bound to the model.

This commit changes device entries so that the model is excluded. In a
commit 53b3ffee7885 ("ALSA: firewire-tascam: change device probing
processing"), I addressed to the concern that version field in
configuration differs depending on installed firmware. However, as long
as I checked, the version number is fixed. It's safe to return version
number back to modalias.

Fixes: 53b3ffee7885 ("ALSA: firewire-tascam: change device probing processing")
Cc: <stable@vger.kernel.org> # 4.4+
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20200823075537.56255-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/firewire/tascam/tascam.c | 33 +++++++++++++++++++++++++++++----
 1 file changed, 29 insertions(+), 4 deletions(-)

diff --git a/sound/firewire/tascam/tascam.c b/sound/firewire/tascam/tascam.c
index 5dac0d9fc58e5..75f2edd8e78fb 100644
--- a/sound/firewire/tascam/tascam.c
+++ b/sound/firewire/tascam/tascam.c
@@ -39,9 +39,6 @@ static const struct snd_tscm_spec model_specs[] = {
 		.midi_capture_ports = 2,
 		.midi_playback_ports = 4,
 	},
-	// This kernel module doesn't support FE-8 because the most of features
-	// can be implemented in userspace without any specific support of this
-	// module.
 };
 
 static int identify_model(struct snd_tscm *tscm)
@@ -211,11 +208,39 @@ static void snd_tscm_remove(struct fw_unit *unit)
 }
 
 static const struct ieee1394_device_id snd_tscm_id_table[] = {
+	// Tascam, FW-1884.
+	{
+		.match_flags = IEEE1394_MATCH_VENDOR_ID |
+			       IEEE1394_MATCH_SPECIFIER_ID |
+			       IEEE1394_MATCH_VERSION,
+		.vendor_id = 0x00022e,
+		.specifier_id = 0x00022e,
+		.version = 0x800000,
+	},
+	// Tascam, FE-8 (.version = 0x800001)
+	// This kernel module doesn't support FE-8 because the most of features
+	// can be implemented in userspace without any specific support of this
+	// module.
+	//
+	// .version = 0x800002 is unknown.
+	//
+	// Tascam, FW-1082.
+	{
+		.match_flags = IEEE1394_MATCH_VENDOR_ID |
+			       IEEE1394_MATCH_SPECIFIER_ID |
+			       IEEE1394_MATCH_VERSION,
+		.vendor_id = 0x00022e,
+		.specifier_id = 0x00022e,
+		.version = 0x800003,
+	},
+	// Tascam, FW-1804.
 	{
 		.match_flags = IEEE1394_MATCH_VENDOR_ID |
-			       IEEE1394_MATCH_SPECIFIER_ID,
+			       IEEE1394_MATCH_SPECIFIER_ID |
+			       IEEE1394_MATCH_VERSION,
 		.vendor_id = 0x00022e,
 		.specifier_id = 0x00022e,
+		.version = 0x800004,
 	},
 	{}
 };
-- 
GitLab


From acd46a6b6de88569654567810acad2b0a0a25cea Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Sun, 23 Aug 2020 16:55:45 +0900
Subject: [PATCH 0520/1341] ALSA: firewire-digi00x: exclude Avid Adrenaline
 from detection

Avid Adrenaline is reported that ALSA firewire-digi00x driver is bound to.
However, as long as he investigated, the design of this model is hardly
similar to the one of Digi 00x family. It's better to exclude the model
from modalias of ALSA firewire-digi00x driver.

This commit changes device entries so that the model is excluded.

$ python3 crpp < ~/git/am-config-rom/misc/avid-adrenaline.img
               ROM header and bus information block
               -----------------------------------------------------------------
400  04203a9c  bus_info_length 4, crc_length 32, crc 15004
404  31333934  bus_name "1394"
408  e064a002  irmc 1, cmc 1, isc 1, bmc 0, cyc_clk_acc 100, max_rec 10 (2048)
40c  00a07e01  company_id 00a07e     |
410  00085257  device_id 0100085257  | EUI-64 00a07e0100085257

               root directory
               -----------------------------------------------------------------
414  0005d08c  directory_length 5, crc 53388
418  0300a07e  vendor
41c  8100000c  --> descriptor leaf at 44c
420  0c008380  node capabilities
424  8d000002  --> eui-64 leaf at 42c
428  d1000004  --> unit directory at 438

               eui-64 leaf at 42c
               -----------------------------------------------------------------
42c  0002410f  leaf_length 2, crc 16655
430  00a07e01  company_id 00a07e     |
434  00085257  device_id 0100085257  | EUI-64 00a07e0100085257

               unit directory at 438
               -----------------------------------------------------------------
438  0004d6c9  directory_length 4, crc 54985
43c  1200a02d  specifier id: 1394 TA
440  13014001  version: Vender Unique and AV/C
444  17000001  model
448  81000009  --> descriptor leaf at 46c

               descriptor leaf at 44c
               -----------------------------------------------------------------
44c  00077205  leaf_length 7, crc 29189
450  00000000  textual descriptor
454  00000000  minimal ASCII
458  41766964  "Avid"
45c  20546563  " Tec"
460  686e6f6c  "hnol"
464  6f677900  "ogy"
468  00000000

               descriptor leaf at 46c
               -----------------------------------------------------------------
46c  000599a5  leaf_length 5, crc 39333
470  00000000  textual descriptor
474  00000000  minimal ASCII
478  41647265  "Adre"
47c  6e616c69  "nali"
480  6e650000  "ne"

Reported-by: Simon Wood <simon@mungewell.org>
Fixes: 9edf723fd858 ("ALSA: firewire-digi00x: add skeleton for Digi 002/003 family")
Cc: <stable@vger.kernel.org> # 4.4+
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20200823075545.56305-1-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/firewire/digi00x/digi00x.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/firewire/digi00x/digi00x.c b/sound/firewire/digi00x/digi00x.c
index c84b913a9fe01..ab8408966ec33 100644
--- a/sound/firewire/digi00x/digi00x.c
+++ b/sound/firewire/digi00x/digi00x.c
@@ -14,6 +14,7 @@ MODULE_LICENSE("GPL v2");
 #define VENDOR_DIGIDESIGN	0x00a07e
 #define MODEL_CONSOLE		0x000001
 #define MODEL_RACK		0x000002
+#define SPEC_VERSION		0x000001
 
 static int name_card(struct snd_dg00x *dg00x)
 {
@@ -175,14 +176,18 @@ static const struct ieee1394_device_id snd_dg00x_id_table[] = {
 	/* Both of 002/003 use the same ID. */
 	{
 		.match_flags = IEEE1394_MATCH_VENDOR_ID |
+			       IEEE1394_MATCH_VERSION |
 			       IEEE1394_MATCH_MODEL_ID,
 		.vendor_id = VENDOR_DIGIDESIGN,
+		.version = SPEC_VERSION,
 		.model_id = MODEL_CONSOLE,
 	},
 	{
 		.match_flags = IEEE1394_MATCH_VENDOR_ID |
+			       IEEE1394_MATCH_VERSION |
 			       IEEE1394_MATCH_MODEL_ID,
 		.vendor_id = VENDOR_DIGIDESIGN,
+		.version = SPEC_VERSION,
 		.model_id = MODEL_RACK,
 	},
 	{}
-- 
GitLab


From 1965c4364bdd025e9e3142592edd76addcc4bab4 Mon Sep 17 00:00:00 2001
From: Kai-Heng Feng <kai.heng.feng@canonical.com>
Date: Sun, 23 Aug 2020 18:58:50 +0800
Subject: [PATCH 0521/1341] ALSA: usb-audio: Disable autosuspend for Lenovo
 ThinkStation P620

If USB autosuspend is enabled, both front and rear panel can no longer
detect jack insertion.

Enable USB remote wakeup, i.e. needs_remote_wakeup = 1, doesn't help
either.

So disable USB autosuspend to prevent missing jack detection event.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20200823105854.26950-1-kai.heng.feng@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/quirks-table.h | 18 ++++++++++++++----
 sound/usb/quirks.c       | 10 ++++++++++
 sound/usb/usbaudio.h     |  1 +
 3 files changed, 25 insertions(+), 4 deletions(-)

diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index f4fb002e3ef42..416de71c6895d 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -2827,14 +2827,24 @@ YAMAHA_DEVICE(0x7010, "UB99"),
 /* Lenovo ThinkStation P620 Rear Line-in, Line-out and Microphone */
 {
 	USB_DEVICE(0x17aa, 0x1046),
-	QUIRK_DEVICE_PROFILE("Lenovo", "ThinkStation P620 Rear",
-			     "Lenovo-ThinkStation-P620-Rear"),
+	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+		.vendor_name = "Lenovo",
+		.product_name = "ThinkStation P620 Rear",
+		.profile_name = "Lenovo-ThinkStation-P620-Rear",
+		.ifnum = QUIRK_ANY_INTERFACE,
+		.type = QUIRK_SETUP_DISABLE_AUTOSUSPEND
+	}
 },
 /* Lenovo ThinkStation P620 Internal Speaker + Front Headset */
 {
 	USB_DEVICE(0x17aa, 0x104d),
-	QUIRK_DEVICE_PROFILE("Lenovo", "ThinkStation P620 Main",
-			     "Lenovo-ThinkStation-P620-Main"),
+	.driver_info = (unsigned long) & (const struct snd_usb_audio_quirk) {
+		.vendor_name = "Lenovo",
+		.product_name = "ThinkStation P620 Main",
+		.profile_name = "Lenovo-ThinkStation-P620-Main",
+		.ifnum = QUIRK_ANY_INTERFACE,
+		.type = QUIRK_SETUP_DISABLE_AUTOSUSPEND
+	}
 },
 
 /* Native Instruments MK2 series */
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index abf99b814a0f8..b800fd92106c7 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -518,6 +518,15 @@ static int setup_fmt_after_resume_quirk(struct snd_usb_audio *chip,
 	return 1;	/* Continue with creating streams and mixer */
 }
 
+static int setup_disable_autosuspend(struct snd_usb_audio *chip,
+				       struct usb_interface *iface,
+				       struct usb_driver *driver,
+				       const struct snd_usb_audio_quirk *quirk)
+{
+	driver->supports_autosuspend = 0;
+	return 1;	/* Continue with creating streams and mixer */
+}
+
 /*
  * audio-interface quirks
  *
@@ -557,6 +566,7 @@ int snd_usb_create_quirk(struct snd_usb_audio *chip,
 		[QUIRK_AUDIO_ALIGN_TRANSFER] = create_align_transfer_quirk,
 		[QUIRK_AUDIO_STANDARD_MIXER] = create_standard_mixer_quirk,
 		[QUIRK_SETUP_FMT_AFTER_RESUME] = setup_fmt_after_resume_quirk,
+		[QUIRK_SETUP_DISABLE_AUTOSUSPEND] = setup_disable_autosuspend,
 	};
 
 	if (quirk->type < QUIRK_TYPE_COUNT) {
diff --git a/sound/usb/usbaudio.h b/sound/usb/usbaudio.h
index b91c4c0807eca..6839915a01286 100644
--- a/sound/usb/usbaudio.h
+++ b/sound/usb/usbaudio.h
@@ -102,6 +102,7 @@ enum quirk_type {
 	QUIRK_AUDIO_ALIGN_TRANSFER,
 	QUIRK_AUDIO_STANDARD_MIXER,
 	QUIRK_SETUP_FMT_AFTER_RESUME,
+	QUIRK_SETUP_DISABLE_AUTOSUSPEND,
 
 	QUIRK_TYPE_COUNT
 };
-- 
GitLab


From 0077b1b2c8d9ad5f7a08b62fb8524cdb9938388f Mon Sep 17 00:00:00 2001
From: Li Jun <jun.li@nxp.com>
Date: Fri, 21 Aug 2020 12:15:47 +0300
Subject: [PATCH 0522/1341] usb: host: xhci: fix ep context print mismatch in
 debugfs

dci is 0 based and xhci_get_ep_ctx() will do ep index increment to get
the ep context.

[rename dci to ep_index -Mathias]
Cc: stable <stable@vger.kernel.org> # v4.15+
Fixes: 02b6fdc2a153 ("usb: xhci: Add debugfs interface for xHCI driver")
Signed-off-by: Li Jun <jun.li@nxp.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200821091549.20556-2-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci-debugfs.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/xhci-debugfs.c b/drivers/usb/host/xhci-debugfs.c
index 92e25a62fdb5b..c88bffd68742d 100644
--- a/drivers/usb/host/xhci-debugfs.c
+++ b/drivers/usb/host/xhci-debugfs.c
@@ -274,7 +274,7 @@ static int xhci_slot_context_show(struct seq_file *s, void *unused)
 
 static int xhci_endpoint_context_show(struct seq_file *s, void *unused)
 {
-	int			dci;
+	int			ep_index;
 	dma_addr_t		dma;
 	struct xhci_hcd		*xhci;
 	struct xhci_ep_ctx	*ep_ctx;
@@ -283,9 +283,9 @@ static int xhci_endpoint_context_show(struct seq_file *s, void *unused)
 
 	xhci = hcd_to_xhci(bus_to_hcd(dev->udev->bus));
 
-	for (dci = 1; dci < 32; dci++) {
-		ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, dci);
-		dma = dev->out_ctx->dma + dci * CTX_SIZE(xhci->hcc_params);
+	for (ep_index = 0; ep_index < 31; ep_index++) {
+		ep_ctx = xhci_get_ep_ctx(xhci, dev->out_ctx, ep_index);
+		dma = dev->out_ctx->dma + (ep_index + 1) * CTX_SIZE(xhci->hcc_params);
 		seq_printf(s, "%pad: %s\n", &dma,
 			   xhci_decode_ep_context(le32_to_cpu(ep_ctx->ep_info),
 						  le32_to_cpu(ep_ctx->ep_info2),
-- 
GitLab


From 904df64a5f4d5ebd670801d869ca0a6d6a6e8df6 Mon Sep 17 00:00:00 2001
From: Kai-Heng Feng <kai.heng.feng@canonical.com>
Date: Fri, 21 Aug 2020 12:15:48 +0300
Subject: [PATCH 0523/1341] xhci: Do warm-reset when both CAS and XDEV_RESUME
 are set

Sometimes re-plugging a USB device during system sleep renders the device
useless:
[  173.418345] xhci_hcd 0000:00:14.0: Get port status 2-4 read: 0x14203e2, return 0x10262
...
[  176.496485] usb 2-4: Waited 2000ms for CONNECT
[  176.496781] usb usb2-port4: status 0000.0262 after resume, -19
[  176.497103] usb 2-4: can't resume, status -19
[  176.497438] usb usb2-port4: logical disconnect

Because PLS equals to XDEV_RESUME, xHCI driver reports U3 to usbcore,
despite of CAS bit is flagged.

So proritize CAS over XDEV_RESUME to let usbcore handle warm-reset for
the port.

Cc: stable <stable@vger.kernel.org>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200821091549.20556-3-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci-hub.c | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index c3554e37e09f3..4e14e164cb687 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -740,15 +740,6 @@ static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci,
 {
 	u32 pls = status_reg & PORT_PLS_MASK;
 
-	/* resume state is a xHCI internal state.
-	 * Do not report it to usb core, instead, pretend to be U3,
-	 * thus usb core knows it's not ready for transfer
-	 */
-	if (pls == XDEV_RESUME) {
-		*status |= USB_SS_PORT_LS_U3;
-		return;
-	}
-
 	/* When the CAS bit is set then warm reset
 	 * should be performed on port
 	 */
@@ -770,6 +761,16 @@ static void xhci_hub_report_usb3_link_state(struct xhci_hcd *xhci,
 		 */
 		pls |= USB_PORT_STAT_CONNECTION;
 	} else {
+		/*
+		 * Resume state is an xHCI internal state.  Do not report it to
+		 * usb core, instead, pretend to be U3, thus usb core knows
+		 * it's not ready for transfer.
+		 */
+		if (pls == XDEV_RESUME) {
+			*status |= USB_SS_PORT_LS_U3;
+			return;
+		}
+
 		/*
 		 * If CAS bit isn't set but the Port is already at
 		 * Compliance Mode, fake a connection so the USB core
-- 
GitLab


From f1ec7ae6c9f8c016db320e204cb519a1da1581b8 Mon Sep 17 00:00:00 2001
From: Ding Hui <dinghui@sangfor.com.cn>
Date: Fri, 21 Aug 2020 12:15:49 +0300
Subject: [PATCH 0524/1341] xhci: Always restore EP_SOFT_CLEAR_TOGGLE even if
 ep reset failed

Some device drivers call libusb_clear_halt when target ep queue
is not empty. (eg. spice client connected to qemu for usb redir)

Before commit f5249461b504 ("xhci: Clear the host side toggle
manually when endpoint is soft reset"), that works well.
But now, we got the error log:

    EP not empty, refuse reset

xhci_endpoint_reset failed and left ep_state's EP_SOFT_CLEAR_TOGGLE
bit still set

So all the subsequent urb sumbits to the ep will fail with the
warn log:

    Can't enqueue URB while manually clearing toggle

We need to clear ep_state EP_SOFT_CLEAR_TOGGLE bit after
xhci_endpoint_reset, even if it failed.

Fixes: f5249461b504 ("xhci: Clear the host side toggle manually when endpoint is soft reset")
Cc: stable <stable@vger.kernel.org> # v4.17+
Signed-off-by: Ding Hui <dinghui@sangfor.com.cn>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200821091549.20556-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/xhci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 3c41b14ecce72..e9884ae9c77dc 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -3236,10 +3236,11 @@ static void xhci_endpoint_reset(struct usb_hcd *hcd,
 
 	wait_for_completion(cfg_cmd->completion);
 
-	ep->ep_state &= ~EP_SOFT_CLEAR_TOGGLE;
 	xhci_free_command(xhci, cfg_cmd);
 cleanup:
 	xhci_free_command(xhci, stop_cmd);
+	if (ep->ep_state & EP_SOFT_CLEAR_TOGGLE)
+		ep->ep_state &= ~EP_SOFT_CLEAR_TOGGLE;
 }
 
 static int xhci_check_streams_endpoint(struct xhci_hcd *xhci,
-- 
GitLab


From afd55e6d1bd35b4b36847869011447a83a81c8e0 Mon Sep 17 00:00:00 2001
From: Sivaprakash Murugesan <sivaprak@codeaurora.org>
Date: Wed, 29 Jul 2020 21:00:03 +0530
Subject: [PATCH 0525/1341] phy: qcom-qmp: Use correct values for ipq8074 PCIe
 Gen2 PHY init

There were some problem in ipq8074 Gen2 PCIe phy init sequence.

1. Few register values were wrongly updated in the phy init sequence.
2. The register QSERDES_RX_SIGDET_CNTRL is a RX tuning parameter
   register which is added in serdes table causing the wrong register
   was getting updated.
3. Clocks and resets were not added in the phy init.

Fix these to make Gen2 PCIe port on ipq8074 devices to work.

Fixes: eef243d04b2b6 ("phy: qcom-qmp: Add support for IPQ8074")
Cc: stable@vger.kernel.org
Co-developed-by: Selvam Sathappan Periakaruppan <speriaka@codeaurora.org>
Signed-off-by: Selvam Sathappan Periakaruppan <speriaka@codeaurora.org>
Signed-off-by: Sivaprakash Murugesan <sivaprak@codeaurora.org>
Link: https://lore.kernel.org/r/1596036607-11877-4-git-send-email-sivaprak@codeaurora.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp.c | 16 +++++++++-------
 drivers/phy/qualcomm/phy-qcom-qmp.h |  2 ++
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.c b/drivers/phy/qualcomm/phy-qcom-qmp.c
index 562053ce94555..6e6f992a95240 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.c
@@ -604,8 +604,8 @@ static const struct qmp_phy_init_tbl ipq8074_pcie_serdes_tbl[] = {
 	QMP_PHY_INIT_CFG(QSERDES_COM_BG_TRIM, 0xf),
 	QMP_PHY_INIT_CFG(QSERDES_COM_LOCK_CMP_EN, 0x1),
 	QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_MAP, 0x0),
-	QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER1, 0x1f),
-	QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER2, 0x3f),
+	QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER1, 0xff),
+	QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_TIMER2, 0x1f),
 	QMP_PHY_INIT_CFG(QSERDES_COM_CMN_CONFIG, 0x6),
 	QMP_PHY_INIT_CFG(QSERDES_COM_PLL_IVCO, 0xf),
 	QMP_PHY_INIT_CFG(QSERDES_COM_HSCLK_SEL, 0x0),
@@ -631,7 +631,6 @@ static const struct qmp_phy_init_tbl ipq8074_pcie_serdes_tbl[] = {
 	QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN1_MODE0, 0x0),
 	QMP_PHY_INIT_CFG(QSERDES_COM_INTEGLOOP_GAIN0_MODE0, 0x80),
 	QMP_PHY_INIT_CFG(QSERDES_COM_BIAS_EN_CTRL_BY_PSM, 0x1),
-	QMP_PHY_INIT_CFG(QSERDES_COM_VCO_TUNE_CTRL, 0xa),
 	QMP_PHY_INIT_CFG(QSERDES_COM_SSC_EN_CENTER, 0x1),
 	QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER1, 0x31),
 	QMP_PHY_INIT_CFG(QSERDES_COM_SSC_PER2, 0x1),
@@ -640,7 +639,6 @@ static const struct qmp_phy_init_tbl ipq8074_pcie_serdes_tbl[] = {
 	QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE1, 0x2f),
 	QMP_PHY_INIT_CFG(QSERDES_COM_SSC_STEP_SIZE2, 0x19),
 	QMP_PHY_INIT_CFG(QSERDES_COM_CLK_EP_DIV, 0x19),
-	QMP_PHY_INIT_CFG(QSERDES_RX_SIGDET_CNTRL, 0x7),
 };
 
 static const struct qmp_phy_init_tbl ipq8074_pcie_tx_tbl[] = {
@@ -648,6 +646,8 @@ static const struct qmp_phy_init_tbl ipq8074_pcie_tx_tbl[] = {
 	QMP_PHY_INIT_CFG(QSERDES_TX_LANE_MODE, 0x6),
 	QMP_PHY_INIT_CFG(QSERDES_TX_RES_CODE_LANE_OFFSET, 0x2),
 	QMP_PHY_INIT_CFG(QSERDES_TX_RCV_DETECT_LVL_2, 0x12),
+	QMP_PHY_INIT_CFG(QSERDES_TX_EMP_POST1_LVL, 0x36),
+	QMP_PHY_INIT_CFG(QSERDES_TX_SLEW_CNTL, 0x0a),
 };
 
 static const struct qmp_phy_init_tbl ipq8074_pcie_rx_tbl[] = {
@@ -658,7 +658,6 @@ static const struct qmp_phy_init_tbl ipq8074_pcie_rx_tbl[] = {
 	QMP_PHY_INIT_CFG(QSERDES_RX_RX_EQU_ADAPTOR_CNTRL4, 0xdb),
 	QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_SATURATION_AND_ENABLE, 0x4b),
 	QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN, 0x4),
-	QMP_PHY_INIT_CFG(QSERDES_RX_UCDR_SO_GAIN_HALF, 0x4),
 };
 
 static const struct qmp_phy_init_tbl ipq8074_pcie_pcs_tbl[] = {
@@ -2046,6 +2045,9 @@ static const struct qmp_phy_cfg msm8996_usb3phy_cfg = {
 	.pwrdn_ctrl		= SW_PWRDN,
 };
 
+static const char * const ipq8074_pciephy_clk_l[] = {
+	"aux", "cfg_ahb",
+};
 /* list of resets */
 static const char * const ipq8074_pciephy_reset_l[] = {
 	"phy", "common",
@@ -2063,8 +2065,8 @@ static const struct qmp_phy_cfg ipq8074_pciephy_cfg = {
 	.rx_tbl_num		= ARRAY_SIZE(ipq8074_pcie_rx_tbl),
 	.pcs_tbl		= ipq8074_pcie_pcs_tbl,
 	.pcs_tbl_num		= ARRAY_SIZE(ipq8074_pcie_pcs_tbl),
-	.clk_list		= NULL,
-	.num_clks		= 0,
+	.clk_list		= ipq8074_pciephy_clk_l,
+	.num_clks		= ARRAY_SIZE(ipq8074_pciephy_clk_l),
 	.reset_list		= ipq8074_pciephy_reset_l,
 	.num_resets		= ARRAY_SIZE(ipq8074_pciephy_reset_l),
 	.vreg_list		= NULL,
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp.h b/drivers/phy/qualcomm/phy-qcom-qmp.h
index 4277f592684b6..904b80ab90090 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp.h
+++ b/drivers/phy/qualcomm/phy-qcom-qmp.h
@@ -77,6 +77,8 @@
 #define QSERDES_COM_CORECLK_DIV_MODE1			0x1bc
 
 /* Only for QMP V2 PHY - TX registers */
+#define QSERDES_TX_EMP_POST1_LVL			0x018
+#define QSERDES_TX_SLEW_CNTL				0x040
 #define QSERDES_TX_RES_CODE_LANE_OFFSET			0x054
 #define QSERDES_TX_DEBUG_BUS_SEL			0x064
 #define QSERDES_TX_HIGHZ_TRANSCEIVEREN_BIAS_DRVR_EN	0x068
-- 
GitLab


From fd7d6de2241453fc7d042336d366a939a25bc5a9 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Sun, 23 Aug 2020 11:00:37 -0600
Subject: [PATCH 0526/1341] io_uring: don't recurse on tsk->sighand->siglock
 with signalfd

If an application is doing reads on signalfd, and we arm the poll handler
because there's no data available, then the wakeup can recurse on the
tasks sighand->siglock as the signal delivery from task_work_add() will
use TWA_SIGNAL and that attempts to lock it again.

We can detect the signalfd case pretty easily by comparing the poll->head
wait_queue_head_t with the target task signalfd wait queue. Just use
normal task wakeup for this case.

Cc: stable@vger.kernel.org # v5.7+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 91e2cc8414f9a..c9d526ff55e08 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1746,7 +1746,8 @@ static struct io_kiocb *io_req_find_next(struct io_kiocb *req)
 	return __io_req_find_next(req);
 }
 
-static int io_req_task_work_add(struct io_kiocb *req, struct callback_head *cb)
+static int io_req_task_work_add(struct io_kiocb *req, struct callback_head *cb,
+				bool twa_signal_ok)
 {
 	struct task_struct *tsk = req->task;
 	struct io_ring_ctx *ctx = req->ctx;
@@ -1759,7 +1760,7 @@ static int io_req_task_work_add(struct io_kiocb *req, struct callback_head *cb)
 	 * will do the job.
 	 */
 	notify = 0;
-	if (!(ctx->flags & IORING_SETUP_SQPOLL))
+	if (!(ctx->flags & IORING_SETUP_SQPOLL) && twa_signal_ok)
 		notify = TWA_SIGNAL;
 
 	ret = task_work_add(tsk, cb, notify);
@@ -1819,7 +1820,7 @@ static void io_req_task_queue(struct io_kiocb *req)
 	init_task_work(&req->task_work, io_req_task_submit);
 	percpu_ref_get(&req->ctx->refs);
 
-	ret = io_req_task_work_add(req, &req->task_work);
+	ret = io_req_task_work_add(req, &req->task_work, true);
 	if (unlikely(ret)) {
 		struct task_struct *tsk;
 
@@ -2322,7 +2323,7 @@ static bool io_rw_reissue(struct io_kiocb *req, long res)
 	init_task_work(&req->task_work, io_rw_resubmit);
 	percpu_ref_get(&req->ctx->refs);
 
-	ret = io_req_task_work_add(req, &req->task_work);
+	ret = io_req_task_work_add(req, &req->task_work, true);
 	if (!ret)
 		return true;
 #endif
@@ -3044,7 +3045,7 @@ static int io_async_buf_func(struct wait_queue_entry *wait, unsigned mode,
 
 	/* submit ref gets dropped, acquire a new one */
 	refcount_inc(&req->refs);
-	ret = io_req_task_work_add(req, &req->task_work);
+	ret = io_req_task_work_add(req, &req->task_work, true);
 	if (unlikely(ret)) {
 		struct task_struct *tsk;
 
@@ -4566,6 +4567,7 @@ struct io_poll_table {
 static int __io_async_wake(struct io_kiocb *req, struct io_poll_iocb *poll,
 			   __poll_t mask, task_work_func_t func)
 {
+	bool twa_signal_ok;
 	int ret;
 
 	/* for instances that support it check for an event match first: */
@@ -4580,13 +4582,21 @@ static int __io_async_wake(struct io_kiocb *req, struct io_poll_iocb *poll,
 	init_task_work(&req->task_work, func);
 	percpu_ref_get(&req->ctx->refs);
 
+	/*
+	 * If we using the signalfd wait_queue_head for this wakeup, then
+	 * it's not safe to use TWA_SIGNAL as we could be recursing on the
+	 * tsk->sighand->siglock on doing the wakeup. Should not be needed
+	 * either, as the normal wakeup will suffice.
+	 */
+	twa_signal_ok = (poll->head != &req->task->sighand->signalfd_wqh);
+
 	/*
 	 * If this fails, then the task is exiting. When a task exits, the
 	 * work gets canceled, so just cancel this request as well instead
 	 * of executing it. We can't safely execute it anyway, as we may not
 	 * have the needed state needed for it anyway.
 	 */
-	ret = io_req_task_work_add(req, &req->task_work);
+	ret = io_req_task_work_add(req, &req->task_work, twa_signal_ok);
 	if (unlikely(ret)) {
 		struct task_struct *tsk;
 
-- 
GitLab


From 204361a77f4018627addd4a06877448f088ddfc0 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Sun, 23 Aug 2020 20:33:10 +0300
Subject: [PATCH 0527/1341] io-wq: fix hang after cancelling pending hashed
 work

Don't forget to update wqe->hash_tail after cancelling a pending work
item, if it was hashed.

Cc: stable@vger.kernel.org # 5.7+
Reported-by: Dmitry Shulyak <yashulyak@gmail.com>
Fixes: 86f3cd1b589a1 ("io-wq: handle hashed writes in chains")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io-wq.c | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/fs/io-wq.c b/fs/io-wq.c
index e92c4724480ca..414beb5438836 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -925,6 +925,24 @@ static bool io_wq_worker_cancel(struct io_worker *worker, void *data)
 	return match->nr_running && !match->cancel_all;
 }
 
+static inline void io_wqe_remove_pending(struct io_wqe *wqe,
+					 struct io_wq_work *work,
+					 struct io_wq_work_node *prev)
+{
+	unsigned int hash = io_get_work_hash(work);
+	struct io_wq_work *prev_work = NULL;
+
+	if (io_wq_is_hashed(work) && work == wqe->hash_tail[hash]) {
+		if (prev)
+			prev_work = container_of(prev, struct io_wq_work, list);
+		if (prev_work && io_get_work_hash(prev_work) == hash)
+			wqe->hash_tail[hash] = prev_work;
+		else
+			wqe->hash_tail[hash] = NULL;
+	}
+	wq_list_del(&wqe->work_list, &work->list, prev);
+}
+
 static void io_wqe_cancel_pending_work(struct io_wqe *wqe,
 				       struct io_cb_cancel_data *match)
 {
@@ -938,8 +956,7 @@ static void io_wqe_cancel_pending_work(struct io_wqe *wqe,
 		work = container_of(node, struct io_wq_work, list);
 		if (!match->fn(work, match->data))
 			continue;
-
-		wq_list_del(&wqe->work_list, node, prev);
+		io_wqe_remove_pending(wqe, work, prev);
 		spin_unlock_irqrestore(&wqe->lock, flags);
 		io_run_cancel(work, wqe);
 		match->nr_pending++;
-- 
GitLab


From d012a7190fc1fd72ed48911e77ca97ba4521bccd Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 23 Aug 2020 14:08:43 -0700
Subject: [PATCH 0528/1341] Linux 5.9-rc2

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index c4470a4e131f2..f211681541609 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 VERSION = 5
 PATCHLEVEL = 9
 SUBLEVEL = 0
-EXTRAVERSION = -rc1
+EXTRAVERSION = -rc2
 NAME = Kleptomaniac Octopus
 
 # *DOCUMENTATION*
-- 
GitLab


From df561f6688fef775baa341a0f5d960becd248b11 Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Date: Sun, 23 Aug 2020 17:36:59 -0500
Subject: [PATCH 0529/1341] treewide: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 arch/alpha/kernel/module.c                    |   2 +-
 arch/alpha/kernel/signal.c                    |   2 +-
 arch/alpha/kernel/traps.c                     |   4 +-
 arch/arc/kernel/disasm.c                      |   2 +-
 arch/arc/kernel/signal.c                      |   2 +-
 arch/arc/kernel/unwind.c                      |   6 +-
 arch/arm/kernel/hw_breakpoint.c               |  10 +-
 arch/arm/kernel/signal.c                      |   2 +-
 arch/arm/mach-ep93xx/crunch.c                 |   2 +-
 arch/arm/mach-mmp/pm-mmp2.c                   |   8 +-
 arch/arm/mach-mmp/pm-pxa910.c                 |  10 +-
 arch/arm/mach-omap2/id.c                      |   8 --
 arch/arm/mach-omap2/omap_device.c             |   2 +-
 arch/arm/mach-orion5x/dns323-setup.c          |   2 +-
 arch/arm/mach-rpc/riscpc.c                    |   2 +-
 arch/arm/mach-tegra/reset.c                   |   2 +-
 arch/arm/mm/alignment.c                       |   4 +-
 arch/arm/mm/proc-v7-bugs.c                    |   2 +-
 arch/arm/plat-omap/dma.c                      |   6 +-
 arch/arm/probes/decode.c                      |   2 +-
 arch/arm/probes/kprobes/core.c                |   2 +-
 arch/arm64/kernel/acpi.c                      |   2 +-
 arch/arm64/kernel/cpufeature.c                |   2 +-
 arch/arm64/kernel/cpuinfo.c                   |   2 +-
 arch/arm64/kernel/hw_breakpoint.c             |   6 +-
 arch/arm64/kernel/module.c                    |   8 +-
 arch/arm64/kernel/smp.c                       |   2 +-
 arch/arm64/kvm/handle_exit.c                  |   2 +-
 arch/arm64/kvm/hyp/include/hyp/debug-sr.h     |  60 ++++-----
 arch/arm64/kvm/hyp/vgic-v3-sr.c               |  16 +--
 arch/arm64/mm/context.c                       |   2 +-
 arch/c6x/kernel/signal.c                      |   4 +-
 arch/csky/kernel/signal.c                     |   2 +-
 arch/h8300/kernel/signal.c                    |   2 +-
 arch/hexagon/kernel/module.c                  |   2 +-
 arch/hexagon/kernel/signal.c                  |   2 +-
 arch/ia64/kernel/crash.c                      |   2 +-
 arch/ia64/kernel/module.c                     |   2 +-
 arch/ia64/kernel/perfmon.c                    |   2 +-
 arch/ia64/kernel/signal.c                     |   2 +-
 arch/ia64/kernel/unaligned.c                  |   6 +-
 arch/ia64/kernel/unwind.c                     |   2 +-
 arch/m68k/atari/atakeyb.c                     |   2 +-
 arch/m68k/kernel/signal.c                     |   2 +-
 arch/m68k/mac/config.c                        |   2 +-
 arch/m68k/mac/via.c                           |   2 +-
 arch/m68k/mm/fault.c                          |   2 +-
 arch/microblaze/kernel/signal.c               |   2 +-
 arch/mips/include/asm/unroll.h                |  64 +++++-----
 arch/nds32/kernel/fpu.c                       |  12 +-
 arch/nds32/kernel/signal.c                    |   4 +-
 arch/openrisc/kernel/signal.c                 |   2 +-
 arch/parisc/kernel/signal.c                   |   2 +-
 arch/parisc/kernel/traps.c                    |  11 +-
 arch/parisc/mm/fault.c                        |   4 +-
 arch/powerpc/net/bpf_jit_comp.c               |   2 +-
 arch/riscv/kernel/signal.c                    |   2 +-
 arch/riscv/net/bpf_jit_comp32.c               |   4 +-
 arch/sh/drivers/platform_early.c              |   2 +-
 arch/sh/kernel/disassemble.c                  |   4 +-
 arch/sh/kernel/kgdb.c                         |   2 +-
 arch/sh/kernel/signal_32.c                    |   2 +-
 arch/sparc/kernel/auxio_64.c                  |   1 -
 arch/sparc/kernel/central.c                   |   2 +-
 arch/sparc/kernel/kgdb_32.c                   |   2 +-
 arch/sparc/kernel/kgdb_64.c                   |   2 +-
 arch/sparc/kernel/pcr.c                       |   2 +-
 arch/sparc/kernel/prom_32.c                   |   2 +-
 arch/sparc/kernel/signal32.c                  |   4 +-
 arch/sparc/kernel/signal_32.c                 |   4 +-
 arch/sparc/kernel/signal_64.c                 |   4 +-
 arch/sparc/math-emu/math_32.c                 |   8 +-
 arch/sparc/net/bpf_jit_comp_32.c              |   2 +-
 arch/um/kernel/signal.c                       |   2 +-
 arch/x86/boot/cmdline.c                       |   4 +-
 arch/x86/boot/compressed/kaslr.c              |   2 +-
 arch/x86/events/intel/core.c                  |   6 +-
 arch/x86/events/intel/lbr.c                   |   2 +-
 arch/x86/kernel/alternative.c                 |   2 +-
 arch/x86/kernel/apic/io_apic.c                |   4 +-
 arch/x86/kernel/apic/probe_32.c               |   2 +-
 arch/x86/kernel/cpu/cacheinfo.c               |   2 +-
 arch/x86/kernel/cpu/mce/inject.c              |   2 +-
 arch/x86/kernel/cpu/mce/intel.c               |   2 +-
 arch/x86/kernel/cpu/mtrr/cyrix.c              |   2 +-
 arch/x86/kernel/hw_breakpoint.c               |   2 +-
 arch/x86/kernel/kgdb.c                        |   4 +-
 arch/x86/kernel/mpparse.c                     |   4 +-
 arch/x86/kernel/ptrace.c                      |   2 +-
 arch/x86/kernel/reboot.c                      |   2 +-
 arch/x86/kernel/signal.c                      |   2 +-
 arch/x86/kernel/uprobes.c                     |   4 +-
 arch/x86/kvm/emulate.c                        |   2 +-
 arch/x86/kvm/hyperv.c                         |   2 +-
 arch/x86/kvm/irq_comm.c                       |   2 +-
 arch/x86/kvm/lapic.c                          |   6 +-
 arch/x86/kvm/mmu/mmu.c                        |   2 +-
 arch/x86/kvm/svm/svm.c                        |   2 +-
 arch/x86/kvm/vmx/vmx.c                        |  12 +-
 arch/x86/kvm/x86.c                            |  11 +-
 arch/x86/lib/cmdline.c                        |   8 +-
 arch/x86/lib/insn-eval.c                      |   6 +-
 arch/x86/math-emu/errors.c                    |   2 +-
 arch/x86/math-emu/fpu_trig.c                  |   2 +-
 arch/x86/mm/ioremap.c                         |   2 +-
 arch/xtensa/kernel/signal.c                   |   2 +-
 block/badblocks.c                             |   2 +-
 block/bfq-iosched.c                           |   4 +-
 block/blk-wbt.c                               |   2 +-
 block/ioprio.c                                |   2 +-
 crypto/drbg.c                                 |   2 +-
 crypto/tcrypt.c                               | 114 +++++++++---------
 .../accessibility/braille/braille_console.c   |   2 +-
 drivers/ata/ahci_brcm.c                       |   2 +-
 drivers/ata/libahci_platform.c                |   2 +-
 drivers/ata/libata-core.c                     |  16 +--
 drivers/ata/libata-eh.c                       |   6 +-
 drivers/ata/libata-scsi.c                     |   4 +-
 drivers/ata/pata_atp867x.c                    |   4 +-
 drivers/ata/pata_serverworks.c                |   2 +-
 drivers/ata/sata_mv.c                         |  12 +-
 drivers/ata/sata_promise.c                    |   8 +-
 drivers/ata/sata_sx4.c                        |   2 +-
 drivers/atm/firestream.c                      |   2 +-
 drivers/atm/fore200e.c                        |  16 +--
 drivers/atm/he.c                              |   4 +-
 drivers/atm/idt77105.c                        |   2 +-
 drivers/atm/lanai.c                           |   2 +-
 drivers/atm/zatm.c                            |   2 +-
 drivers/auxdisplay/panel.c                    |   6 +-
 drivers/base/firmware_loader/fallback.c       |   4 +-
 drivers/block/aoe/aoecmd.c                    |   2 +-
 drivers/block/ataflop.c                       |   2 +-
 drivers/block/drbd/drbd_int.h                 |   2 +-
 drivers/block/drbd/drbd_main.c                |   2 +-
 drivers/block/drbd/drbd_nl.c                  |   2 +-
 drivers/block/drbd/drbd_receiver.c            |  12 +-
 drivers/block/drbd/drbd_req.c                 |   4 +-
 drivers/block/floppy.c                        |   4 +-
 drivers/block/loop.c                          |   4 +-
 drivers/block/paride/pd.c                     |   4 +-
 drivers/block/pktcdvd.c                       |   2 +-
 drivers/block/rbd.c                           |   8 +-
 drivers/block/rsxx/core.c                     |   2 +-
 drivers/block/skd_main.c                      |   2 +-
 drivers/block/xen-blkback/blkback.c           |   2 +-
 drivers/block/xen-blkback/xenbus.c            |   2 +-
 drivers/block/xen-blkfront.c                  |   5 +-
 drivers/bus/ti-sysc.c                         |   2 +-
 drivers/char/agp/ali-agp.c                    |   2 +-
 drivers/char/ipmi/kcs_bmc.c                   |   2 +-
 drivers/char/lp.c                             |   4 +-
 drivers/char/mem.c                            |   2 +-
 drivers/char/nvram.c                          |   2 +-
 drivers/clocksource/timer-cadence-ttc.c       |   4 +-
 drivers/cpufreq/p4-clockmod.c                 |   2 +-
 drivers/cpufreq/speedstep-lib.c               |   2 +-
 drivers/cpufreq/ti-cpufreq.c                  |   4 +-
 drivers/crypto/axis/artpec6_crypto.c          |   2 +-
 drivers/crypto/cavium/cpt/cptvf_reqmanager.c  |   4 +-
 drivers/crypto/chelsio/chcr_ktls.c            |   4 +-
 .../marvell/octeontx/otx_cptvf_reqmgr.c       |   4 +-
 drivers/crypto/qat/qat_common/adf_pf2vf_msg.c |   2 +-
 drivers/crypto/qat/qat_common/qat_uclo.c      |   6 +-
 drivers/crypto/ux500/cryp/cryp.c              |  12 +-
 drivers/dma/amba-pl08x.c                      |  10 +-
 drivers/dma/fsldma.c                          |   2 +-
 drivers/dma/imx-dma.c                         |   2 +-
 drivers/dma/iop-adma.h                        |  12 +-
 drivers/dma/nbpfaxi.c                         |   2 +-
 drivers/dma/pl330.c                           |  10 +-
 drivers/dma/sh/shdma-base.c                   |   2 +-
 drivers/edac/amd64_edac.c                     |   2 +-
 drivers/edac/pnd2_edac.c                      |   2 +-
 drivers/firewire/core-device.c                |   2 +-
 drivers/firewire/core-iso.c                   |   2 +-
 drivers/firewire/core-topology.c              |   2 +-
 drivers/firewire/core-transaction.c           |   4 +-
 drivers/firewire/ohci.c                       |   4 +-
 drivers/gpio/gpio-aspeed-sgpio.c              |   6 +-
 drivers/gpio/gpio-aspeed.c                    |   6 +-
 drivers/gpio/gpio-ath79.c                     |   2 +-
 drivers/gpio/gpio-eic-sprd.c                  |   4 +-
 drivers/gpio/gpio-stmpe.c                     |   4 +-
 drivers/gpio/gpiolib-acpi.c                   |   2 +-
 .../drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10_3.c  |   2 +-
 drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c         |   2 +-
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c         |   2 +-
 drivers/gpu/drm/amd/amdgpu/si_dpm.c           |   2 +-
 drivers/gpu/drm/arm/malidp_hw.c               |   6 +-
 drivers/gpu/drm/ast/ast_main.c                |   2 +-
 drivers/gpu/drm/bridge/nwl-dsi.c              |   2 -
 .../drm/bridge/synopsys/dw-hdmi-i2s-audio.c   |   4 +-
 drivers/gpu/drm/bridge/ti-sn65dsi86.c         |   6 +-
 drivers/gpu/drm/drm_bufs.c                    |   2 +-
 drivers/gpu/drm/drm_dp_helper.c               |   2 +-
 drivers/gpu/drm/drm_modes.c                   |   2 +-
 drivers/gpu/drm/exynos/exynos_drm_dsi.c       |  10 +-
 drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c   |   6 +-
 drivers/gpu/drm/i915/display/icl_dsi.c        |   6 +-
 drivers/gpu/drm/i915/display/intel_bios.c     |   6 +-
 drivers/gpu/drm/i915/display/intel_cdclk.c    |  10 +-
 .../gpu/drm/i915/display/intel_combo_phy.c    |   6 +-
 drivers/gpu/drm/i915/display/intel_ddi.c      |   4 +-
 drivers/gpu/drm/i915/display/intel_display.c  |  20 +--
 drivers/gpu/drm/i915/display/intel_dpll_mgr.c |   8 +-
 drivers/gpu/drm/i915/display/intel_panel.c    |   2 +-
 drivers/gpu/drm/i915/display/intel_sdvo.c     |  12 +-
 drivers/gpu/drm/i915/display/intel_sprite.c   |  22 ++--
 drivers/gpu/drm/i915/display/intel_tc.c       |   2 +-
 drivers/gpu/drm/i915/gem/i915_gem_mman.c      |   2 +-
 drivers/gpu/drm/i915/gem/i915_gem_pages.c     |   2 +-
 drivers/gpu/drm/i915/gem/i915_gem_stolen.c    |   6 +-
 drivers/gpu/drm/i915/gt/intel_engine_cs.c     |   2 +-
 drivers/gpu/drm/i915/gt/intel_ggtt.c          |   2 +-
 .../gpu/drm/i915/gt/intel_ring_submission.c   |   2 +-
 drivers/gpu/drm/i915/gvt/handlers.c           |   2 +-
 drivers/gpu/drm/i915/i915_gpu_error.c         |   2 +-
 drivers/gpu/drm/i915/i915_pmu.c               |   2 +-
 drivers/gpu/drm/imx/ipuv3-plane.c             |   2 +-
 drivers/gpu/drm/meson/meson_osd_afbcd.c       |   2 +-
 drivers/gpu/drm/meson/meson_overlay.c         |   4 +-
 drivers/gpu/drm/msm/adreno/a5xx_gpu.c         |   4 +-
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c         |   2 +-
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c         |   2 +-
 drivers/gpu/drm/msm/adreno/adreno_gpu.c       |   2 +-
 drivers/gpu/drm/omapdrm/dss/venc.c            |   2 +-
 drivers/gpu/drm/radeon/ci_dpm.c               |   2 +-
 drivers/gpu/drm/radeon/r300.c                 |   4 +-
 drivers/gpu/drm/radeon/r420.c                 |   2 +-
 drivers/gpu/drm/radeon/r600_cs.c              |   4 +-
 drivers/gpu/drm/radeon/radeon_uvd.c           |   2 +-
 drivers/gpu/drm/radeon/si_dpm.c               |   2 +-
 drivers/gpu/drm/radeon/uvd_v1_0.c             |   2 +-
 drivers/gpu/drm/savage/savage_state.c         |  10 +-
 drivers/gpu/drm/sti/sti_hdmi.c                |   6 +-
 drivers/gpu/drm/sun4i/sun4i_tcon.c            |   4 +-
 drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c        |   2 +-
 drivers/gpu/drm/tegra/dc.c                    |   2 +-
 drivers/gpu/drm/tilcdc/tilcdc_crtc.c          |   2 +-
 drivers/gpu/drm/ttm/ttm_bo_vm.c               |   2 +-
 drivers/gpu/drm/via/via_dmablit.c             |   8 +-
 drivers/gpu/drm/xen/xen_drm_front.c           |   3 -
 drivers/gpu/ipu-v3/ipu-dc.c                   |   2 +-
 drivers/hid/hid-lg-g15.c                      |   2 +-
 drivers/hid/hid-logitech-dj.c                 |   2 +-
 drivers/hid/hid-microsoft.c                   |   3 -
 drivers/hid/hid-rmi.c                         |   1 -
 drivers/hid/hid-roccat-kone.c                 |   2 +-
 drivers/hid/hid-uclogic-params.c              |   2 +-
 drivers/hid/hid-wiimote-core.c                |   2 -
 drivers/hid/usbhid/hiddev.c                   |   1 -
 drivers/hid/wacom_wac.c                       |  32 ++---
 drivers/hsi/clients/ssi_protocol.c            |   6 +-
 drivers/hsi/controllers/omap_ssi_core.c       |   2 +-
 drivers/hv/hv_kvp.c                           |   2 +-
 drivers/hwmon/adt7462.c                       |   8 +-
 drivers/hwmon/emc1403.c                       |   4 +-
 drivers/hwmon/f71882fg.c                      |   4 +-
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 drivers/hwmon/ina3221.c                       |   2 +-
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 .../hwtracing/coresight/coresight-cpu-debug.c |   4 +-
 drivers/hwtracing/coresight/coresight-etm4x.c |   1 -
 drivers/hwtracing/coresight/coresight-tmc.c   |   2 -
 drivers/hwtracing/intel_th/sth.c              |   4 +-
 drivers/i2c/busses/i2c-omap.c                 |   1 -
 drivers/i2c/busses/i2c-opal.c                 |   2 +-
 drivers/i3c/master/dw-i3c-master.c            |   2 +-
 drivers/ide/hpt366.c                          |   6 +-
 drivers/ide/ide-cd.c                          |   4 +-
 drivers/ide/ide-floppy.c                      |   2 +-
 drivers/ide/ide-probe.c                       |   2 +-
 drivers/ide/ide-taskfile.c                    |  12 +-
 drivers/ide/sis5513.c                         |   2 +-
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 drivers/iio/adc/cpcap-adc.c                   |   2 +-
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 drivers/iio/dac/ad5592r-base.c                |   2 -
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 drivers/infiniband/hw/cxgb4/qp.c              |   2 +-
 drivers/infiniband/hw/hfi1/pio_copy.c         |   1 -
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 drivers/infiniband/hw/i40iw/i40iw_puda.c      |   4 +-
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 .../infiniband/ulp/opa_vnic/opa_vnic_vema.c   |   1 -
 drivers/input/joystick/fsia6b.c               |   4 +-
 drivers/input/joystick/gamecon.c              |   1 -
 drivers/input/tablet/wacom_serial4.c          |   2 +-
 drivers/input/touchscreen/atmel_mxt_ts.c      |   2 +-
 drivers/input/touchscreen/wm831x-ts.c         |   2 +-
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 drivers/scsi/scsi_error.c                     |  28 ++---
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 fs/afs/fsclient.c                             |  42 +++----
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 fs/afs/rxrpc.c                                |   6 +-
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 fs/afs/yfsclient.c                            |  50 ++++----
 fs/aio.c                                      |   2 +-
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 fs/notify/fanotify/fanotify_user.c            |   2 +-
 fs/ocfs2/cluster/quorum.c                     |   2 +-
 fs/pstore/zone.c                              |   1 -
 fs/quota/quota.c                              |   2 +-
 fs/seq_file.c                                 |   2 +-
 fs/signalfd.c                                 |   2 +-
 fs/ubifs/lprops.c                             |   4 +-
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 fs/vboxsf/utils.c                             |   2 +-
 include/linux/compat.h                        |   6 +-
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 include/linux/jhash.h                         |  26 ++--
 include/linux/mm.h                            |   9 +-
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 include/math-emu/op-common.h                  |  10 +-
 ipc/sem.c                                     |   4 +-
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 lib/dim/rdma_dim.c                            |   4 +-
 lib/glob.c                                    |   2 +-
 lib/siphash.c                                 |  36 +++---
 lib/ts_fsm.c                                  |   2 +-
 lib/vsprintf.c                                |  15 +--
 lib/xz/xz_dec_lzma2.c                         |   4 +-
 lib/xz/xz_dec_stream.c                        |  16 +--
 lib/zstd/bitstream.h                          |  10 +-
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 net/8021q/vlan_dev.c                          |   2 +-
 net/9p/trans_xen.c                            |   2 +-
 net/atm/common.c                              |   4 +-
 net/atm/lec.c                                 |   2 +-
 net/atm/resources.c                           |   8 +-
 net/bpf/test_run.c                            |   2 +-
 net/can/j1939/socket.c                        |   2 +-
 net/can/j1939/transport.c                     |  20 +--
 net/ceph/ceph_hash.c                          |  20 +--
 net/ceph/crush/mapper.c                       |   2 +-
 net/ceph/messenger.c                          |   4 +-
 net/ceph/mon_client.c                         |   2 +-
 net/ceph/osd_client.c                         |   4 +-
 net/core/dev.c                                |   4 +-
 net/core/dev_ioctl.c                          |   6 +-
 net/core/devlink.c                            |   4 +-
 net/core/drop_monitor.c                       |   2 +-
 net/core/filter.c                             |   2 +-
 net/core/pktgen.c                             |   2 +-
 net/core/skmsg.c                              |   1 -
 net/core/sock.c                               |   2 +-
 net/dccp/ccids/ccid3.c                        |   2 +-
 net/dccp/feat.c                               |   3 +-
 net/dccp/input.c                              |  10 +-
 net/dccp/options.c                            |   2 +-
 net/dccp/output.c                             |   8 +-
 net/dccp/proto.c                              |   8 +-
 net/decnet/af_decnet.c                        |   6 +-
 net/decnet/dn_nsp_in.c                        |   2 +-
 net/decnet/dn_table.c                         |   2 +-
 net/decnet/sysctl_net_decnet.c                |   2 +-
 net/dsa/slave.c                               |   2 +-
 net/ieee802154/6lowpan/reassembly.c           |   2 +-
 net/ieee802154/6lowpan/rx.c                   |   4 +-
 net/iucv/af_iucv.c                            |  10 +-
 net/mpls/af_mpls.c                            |   2 +-
 net/mptcp/protocol.c                          |   3 +-
 net/ncsi/ncsi-manage.c                        |   4 +-
 net/netfilter/ipvs/ip_vs_proto_tcp.c          |   2 +-
 net/netfilter/ipvs/ip_vs_proto_udp.c          |   2 +-
 net/netlink/policy.c                          |   2 +-
 net/netrom/nr_in.c                            |   2 +-
 net/netrom/nr_route.c                         |   8 +-
 net/openvswitch/conntrack.c                   |   4 +-
 net/openvswitch/flow.c                        |   2 +-
 net/packet/af_packet.c                        |   2 +-
 net/phonet/pep.c                              |  10 +-
 net/rds/send.c                                |   2 +-
 net/rose/rose_in.c                            |   2 +-
 net/rose/rose_route.c                         |   4 +-
 net/rxrpc/af_rxrpc.c                          |   6 +-
 net/rxrpc/call_accept.c                       |   2 +-
 net/rxrpc/conn_client.c                       |   2 +-
 net/rxrpc/input.c                             |   6 +-
 net/rxrpc/local_object.c                      |   2 +-
 net/rxrpc/peer_event.c                        |   2 +-
 net/rxrpc/recvmsg.c                           |   2 +-
 net/rxrpc/sendmsg.c                           |   6 +-
 net/sched/sch_cake.c                          |   2 +-
 net/sctp/ipv6.c                               |   2 +-
 net/sctp/outqueue.c                           |   6 +-
 net/sctp/sm_make_chunk.c                      |   2 +-
 net/sctp/sm_sideeffect.c                      |   2 +-
 net/sctp/sm_statefuns.c                       |   2 +-
 net/smc/smc_close.c                           |   2 +-
 net/sunrpc/auth_gss/gss_krb5_wrap.c           |   2 +-
 net/sunrpc/clnt.c                             |  22 ++--
 net/sunrpc/xprt.c                             |   2 +-
 net/sunrpc/xprtrdma/verbs.c                   |   2 +-
 net/sunrpc/xprtsock.c                         |   8 +-
 net/tipc/bearer.c                             |   2 +-
 net/tipc/group.c                              |   2 +-
 net/tipc/link.c                               |   2 +-
 net/tipc/socket.c                             |   4 +-
 net/unix/af_unix.c                            |   2 +-
 net/wireless/chan.c                           |   4 +-
 net/wireless/mlme.c                           |   2 +-
 net/wireless/nl80211.c                        |  20 +--
 net/wireless/scan.c                           |   2 +-
 net/wireless/sme.c                            |   4 +-
 net/wireless/util.c                           |   4 +-
 net/wireless/wext-compat.c                    |   4 +-
 net/x25/x25_facilities.c                      |   2 +-
 net/x25/x25_in.c                              |   2 +-
 net/xfrm/xfrm_policy.c                        |   2 +-
 samples/bpf/hbm.c                             |   2 +-
 security/apparmor/domain.c                    |   2 +-
 security/apparmor/lib.c                       |   4 +-
 security/integrity/ima/ima_appraise.c         |   4 +-
 security/integrity/ima/ima_policy.c           |   8 +-
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 security/keys/process_keys.c                  |   6 +-
 security/keys/request_key.c                   |   8 +-
 security/selinux/hooks.c                      |   8 +-
 security/selinux/ss/mls.c                     |   4 +-
 security/smack/smack_lsm.c                    |   2 +-
 security/tomoyo/common.c                      |  18 +--
 security/tomoyo/file.c                        |   2 +-
 sound/ppc/snd_ps3.c                           |   4 +-
 sound/soc/atmel/mchp-i2s-mcc.c                |   2 +-
 sound/soc/codecs/jz4770.c                     |   2 +-
 sound/soc/codecs/pcm186x.c                    |   2 +-
 sound/soc/fsl/fsl_ssi.c                       |   2 +-
 sound/soc/hisilicon/hi6210-i2s.c              |   4 +-
 sound/soc/intel/baytrail/sst-baytrail-pcm.c   |   2 +-
 sound/soc/intel/boards/bytcht_es8316.c        |   2 +-
 sound/soc/intel/boards/bytcr_rt5651.c         |   4 +-
 sound/soc/intel/skylake/skl-pcm.c             |   2 +-
 sound/soc/meson/axg-tdm-interface.c           |  10 +-
 sound/soc/pxa/pxa-ssp.c                       |   2 +-
 sound/soc/rockchip/rockchip_pdm.c             |   6 +-
 sound/soc/samsung/i2s.c                       |   2 +-
 sound/soc/soc-core.c                          |   2 +-
 sound/soc/soc-topology.c                      |   4 +-
 sound/soc/sof/intel/hda-dai.c                 |   4 +-
 sound/soc/sof/pcm.c                           |   4 +-
 sound/soc/ti/davinci-i2s.c                    |   2 +-
 sound/soc/ti/n810.c                           |   2 +-
 sound/soc/ti/omap-dmic.c                      |   4 +-
 sound/soc/ti/omap-mcpdm.c                     |   8 +-
 sound/soc/ti/rx51.c                           |   2 +-
 sound/soc/zte/zx-i2s.c                        |   4 +-
 sound/soc/zte/zx-spdif.c                      |   2 +-
 1148 files changed, 2667 insertions(+), 2737 deletions(-)

diff --git a/arch/alpha/kernel/module.c b/arch/alpha/kernel/module.c
index ac110ae8f9780..5b60c248de9ea 100644
--- a/arch/alpha/kernel/module.c
+++ b/arch/alpha/kernel/module.c
@@ -212,7 +212,7 @@ apply_relocate_add(Elf64_Shdr *sechdrs, const char *strtab,
 			    STO_ALPHA_STD_GPLOAD)
 				/* Omit the prologue. */
 				value += 8;
-			/* FALLTHRU */
+			fallthrough;
 		case R_ALPHA_BRADDR:
 			value -= (u64)location + 4;
 			if (value & 3)
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index a813020d2f117..15bc9d1e79f4d 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -453,7 +453,7 @@ syscall_restart(unsigned long r0, unsigned long r19,
 			regs->r0 = EINTR;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case ERESTARTNOINTR:
 		regs->r0 = r0;	/* reset v0 and a3 and replay syscall */
 		regs->r19 = r19;
diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c
index 49754e07e04f4..921d4b6e4d956 100644
--- a/arch/alpha/kernel/traps.c
+++ b/arch/alpha/kernel/traps.c
@@ -883,7 +883,7 @@ do_entUnaUser(void __user * va, unsigned long opcode,
 
 	case 0x26: /* sts */
 		fake_reg = s_reg_to_mem(alpha_read_fp_reg(reg));
-		/* FALLTHRU */
+		fallthrough;
 
 	case 0x2c: /* stl */
 		__asm__ __volatile__(
@@ -911,7 +911,7 @@ do_entUnaUser(void __user * va, unsigned long opcode,
 
 	case 0x27: /* stt */
 		fake_reg = alpha_read_fp_reg(reg);
-		/* FALLTHRU */
+		fallthrough;
 
 	case 0x2d: /* stq */
 		__asm__ __volatile__(
diff --git a/arch/arc/kernel/disasm.c b/arch/arc/kernel/disasm.c
index d04837d91b407..03f8b1be0c3a8 100644
--- a/arch/arc/kernel/disasm.c
+++ b/arch/arc/kernel/disasm.c
@@ -339,7 +339,7 @@ void __kprobes disasm_instr(unsigned long addr, struct disasm_state *state,
 
 	case op_LDWX_S:	/* LDWX_S c, [b, u6] */
 		state->x = 1;
-		/* intentional fall-through */
+		fallthrough;
 
 	case op_LDW_S:	/* LDW_S c, [b, u6] */
 		state->zz = 2;
diff --git a/arch/arc/kernel/signal.c b/arch/arc/kernel/signal.c
index 3d57ed0d85350..8222f8c546902 100644
--- a/arch/arc/kernel/signal.c
+++ b/arch/arc/kernel/signal.c
@@ -321,7 +321,7 @@ static void arc_restart_syscall(struct k_sigaction *ka, struct pt_regs *regs)
 			regs->r0 = -EINTR;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 
 	case -ERESTARTNOINTR:
 		/*
diff --git a/arch/arc/kernel/unwind.c b/arch/arc/kernel/unwind.c
index f87758a6851bd..74ad4256022e4 100644
--- a/arch/arc/kernel/unwind.c
+++ b/arch/arc/kernel/unwind.c
@@ -572,7 +572,7 @@ static unsigned long read_pointer(const u8 **pLoc, const void *end,
 #else
 		BUILD_BUG_ON(sizeof(u32) != sizeof(value));
 #endif
-		/* Fall through */
+		fallthrough;
 	case DW_EH_PE_native:
 		if (end < (const void *)(ptr.pul + 1))
 			return 0;
@@ -827,7 +827,7 @@ static int processCFI(const u8 *start, const u8 *end, unsigned long targetLoc,
 			case DW_CFA_def_cfa:
 				state->cfa.reg = get_uleb128(&ptr.p8, end);
 				unw_debug("cfa_def_cfa: r%lu ", state->cfa.reg);
-				/* fall through */
+				fallthrough;
 			case DW_CFA_def_cfa_offset:
 				state->cfa.offs = get_uleb128(&ptr.p8, end);
 				unw_debug("cfa_def_cfa_offset: 0x%lx ",
@@ -835,7 +835,7 @@ static int processCFI(const u8 *start, const u8 *end, unsigned long targetLoc,
 				break;
 			case DW_CFA_def_cfa_sf:
 				state->cfa.reg = get_uleb128(&ptr.p8, end);
-				/* fall through */
+				fallthrough;
 			case DW_CFA_def_cfa_offset_sf:
 				state->cfa.offs = get_sleb128(&ptr.p8, end)
 				    * state->dataAlign;
diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c
index 7fff88e612525..7a4853b1213a8 100644
--- a/arch/arm/kernel/hw_breakpoint.c
+++ b/arch/arm/kernel/hw_breakpoint.c
@@ -547,7 +547,7 @@ static int arch_build_bp_info(struct perf_event *bp,
 		if ((hw->ctrl.type != ARM_BREAKPOINT_EXECUTE)
 			&& max_watchpoint_len >= 8)
 			break;
-		/* Else, fall through */
+		fallthrough;
 	default:
 		return -EINVAL;
 	}
@@ -612,12 +612,12 @@ int hw_breakpoint_arch_parse(struct perf_event *bp,
 		/* Allow halfword watchpoints and breakpoints. */
 		if (hw->ctrl.len == ARM_BREAKPOINT_LEN_2)
 			break;
-		/* Else, fall through */
+		fallthrough;
 	case 3:
 		/* Allow single byte watchpoint. */
 		if (hw->ctrl.len == ARM_BREAKPOINT_LEN_1)
 			break;
-		/* Else, fall through */
+		fallthrough;
 	default:
 		ret = -EINVAL;
 		goto out;
@@ -884,7 +884,7 @@ static int hw_breakpoint_pending(unsigned long addr, unsigned int fsr,
 		break;
 	case ARM_ENTRY_ASYNC_WATCHPOINT:
 		WARN(1, "Asynchronous watchpoint exception taken. Debugging results may be unreliable\n");
-		/* Fall through */
+		fallthrough;
 	case ARM_ENTRY_SYNC_WATCHPOINT:
 		watchpoint_handler(addr, fsr, regs);
 		break;
@@ -933,7 +933,7 @@ static bool core_has_os_save_restore(void)
 		ARM_DBG_READ(c1, c1, 4, oslsr);
 		if (oslsr & ARM_OSLSR_OSLM0)
 			return true;
-		/* Else, fall through */
+		fallthrough;
 	default:
 		return false;
 	}
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index c9dc912b83f01..c1892f733f208 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -596,7 +596,7 @@ static int do_signal(struct pt_regs *regs, int syscall)
 		switch (retval) {
 		case -ERESTART_RESTARTBLOCK:
 			restart -= 2;
-			/* Fall through */
+			fallthrough;
 		case -ERESTARTNOHAND:
 		case -ERESTARTSYS:
 		case -ERESTARTNOINTR:
diff --git a/arch/arm/mach-ep93xx/crunch.c b/arch/arm/mach-ep93xx/crunch.c
index 1c05c5bf7e5c8..757032d82f630 100644
--- a/arch/arm/mach-ep93xx/crunch.c
+++ b/arch/arm/mach-ep93xx/crunch.c
@@ -49,7 +49,7 @@ static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t)
 		 * FALLTHROUGH: Ensure we don't try to overwrite our newly
 		 * initialised state information on the first fault.
 		 */
-		/* Fall through */
+		fallthrough;
 
 	case THREAD_NOTIFY_EXIT:
 		crunch_task_release(thread);
diff --git a/arch/arm/mach-mmp/pm-mmp2.c b/arch/arm/mach-mmp/pm-mmp2.c
index 2d86381e152d6..7a6f74c32d428 100644
--- a/arch/arm/mach-mmp/pm-mmp2.c
+++ b/arch/arm/mach-mmp/pm-mmp2.c
@@ -123,19 +123,19 @@ void mmp2_pm_enter_lowpower_mode(int state)
 	case POWER_MODE_SYS_SLEEP:
 		apcr |= MPMU_PCR_PJ_SLPEN;		/* set the SLPEN bit */
 		apcr |= MPMU_PCR_PJ_VCTCXOSD;		/* set VCTCXOSD */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_CHIP_SLEEP:
 		apcr |= MPMU_PCR_PJ_SLPEN;
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_APPS_SLEEP:
 		apcr |= MPMU_PCR_PJ_APBSD;		/* set APBSD */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_APPS_IDLE:
 		apcr |= MPMU_PCR_PJ_AXISD;		/* set AXISDD bit */
 		apcr |= MPMU_PCR_PJ_DDRCORSD;		/* set DDRCORSD bit */
 		idle_cfg |= APMU_PJ_IDLE_CFG_PJ_PWRDWN;	/* PJ power down */
 		apcr |= MPMU_PCR_PJ_SPSD;
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_CORE_EXTIDLE:
 		idle_cfg |= APMU_PJ_IDLE_CFG_PJ_IDLE;	/* set the IDLE bit */
 		idle_cfg &= ~APMU_PJ_IDLE_CFG_ISO_MODE_CNTRL_MASK;
diff --git a/arch/arm/mach-mmp/pm-pxa910.c b/arch/arm/mach-mmp/pm-pxa910.c
index 69ebe18ff209f..1d71d73c18620 100644
--- a/arch/arm/mach-mmp/pm-pxa910.c
+++ b/arch/arm/mach-mmp/pm-pxa910.c
@@ -145,23 +145,23 @@ void pxa910_pm_enter_lowpower_mode(int state)
 	case POWER_MODE_UDR:
 		/* only shutdown APB in UDR */
 		apcr |= MPMU_APCR_STBYEN | MPMU_APCR_APBSD;
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_SYS_SLEEP:
 		apcr |= MPMU_APCR_SLPEN;		/* set the SLPEN bit */
 		apcr |= MPMU_APCR_VCTCXOSD;		/* set VCTCXOSD */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_APPS_SLEEP:
 		apcr |= MPMU_APCR_DDRCORSD;		/* set DDRCORSD */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_APPS_IDLE:
 		apcr |= MPMU_APCR_AXISD;		/* set AXISDD bit */
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_CORE_EXTIDLE:
 		idle_cfg |= APMU_MOH_IDLE_CFG_MOH_IDLE;
 		idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWRDWN;
 		idle_cfg |= APMU_MOH_IDLE_CFG_MOH_PWR_SW(3)
 			| APMU_MOH_IDLE_CFG_MOH_L2_PWR_SW(3);
-		/* fall through */
+		fallthrough;
 	case POWER_MODE_CORE_INTIDLE:
 		break;
 	}
diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
index 1d119b974f5ff..59755b5a1ad7a 100644
--- a/arch/arm/mach-omap2/id.c
+++ b/arch/arm/mach-omap2/id.c
@@ -396,7 +396,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "3.1";
 			break;
 		case 7:
-		/* FALLTHROUGH */
 		default:
 			/* Use the latest known revision as default */
 			omap_revision = OMAP3430_REV_ES3_1_2;
@@ -416,7 +415,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "1.0";
 			break;
 		case 1:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = AM35XX_REV_ES1_1;
 			cpu_rev = "1.1";
@@ -435,7 +433,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "1.1";
 			break;
 		case 2:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = OMAP3630_REV_ES1_2;
 			cpu_rev = "1.2";
@@ -456,7 +453,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "2.0";
 			break;
 		case 3:
-			/* FALLTHROUGH */
 		default:
 			omap_revision = TI8168_REV_ES2_1;
 			cpu_rev = "2.1";
@@ -473,7 +469,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "2.0";
 			break;
 		case 2:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = AM335X_REV_ES2_1;
 			cpu_rev = "2.1";
@@ -491,7 +486,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "1.1";
 			break;
 		case 2:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = AM437X_REV_ES1_2;
 			cpu_rev = "1.2";
@@ -502,7 +496,6 @@ void __init omap3xxx_check_revision(void)
 	case 0xb968:
 		switch (rev) {
 		case 0:
-		/* FALLTHROUGH */
 		case 1:
 			omap_revision = TI8148_REV_ES1_0;
 			cpu_rev = "1.0";
@@ -512,7 +505,6 @@ void __init omap3xxx_check_revision(void)
 			cpu_rev = "2.0";
 			break;
 		case 3:
-		/* FALLTHROUGH */
 		default:
 			omap_revision = TI8148_REV_ES2_1;
 			cpu_rev = "2.1";
diff --git a/arch/arm/mach-omap2/omap_device.c b/arch/arm/mach-omap2/omap_device.c
index 6b4548f3b57f0..fc7bb2ca16727 100644
--- a/arch/arm/mach-omap2/omap_device.c
+++ b/arch/arm/mach-omap2/omap_device.c
@@ -240,7 +240,7 @@ static int _omap_device_notifier_call(struct notifier_block *nb,
 		if (pdev->dev.of_node)
 			omap_device_build_from_dt(pdev);
 		omap_auxdata_legacy_init(dev);
-		/* fall through */
+		fallthrough;
 	default:
 		od = to_omap_device(pdev);
 		if (od)
diff --git a/arch/arm/mach-orion5x/dns323-setup.c b/arch/arm/mach-orion5x/dns323-setup.c
index d13344b2ddcd4..87cb47220e825 100644
--- a/arch/arm/mach-orion5x/dns323-setup.c
+++ b/arch/arm/mach-orion5x/dns323-setup.c
@@ -624,7 +624,7 @@ static void __init dns323_init(void)
 		 dns323ab_leds[0].active_low = 1;
 		 gpio_request(DNS323_GPIO_LED_POWER1, "Power Led Enable");
 		 gpio_direction_output(DNS323_GPIO_LED_POWER1, 0);
-		/* Fall through */
+		fallthrough;
 	case DNS323_REV_B1:
 		i2c_register_board_info(0, dns323ab_i2c_devices,
 				ARRAY_SIZE(dns323ab_i2c_devices));
diff --git a/arch/arm/mach-rpc/riscpc.c b/arch/arm/mach-rpc/riscpc.c
index ea2c84214bac1..d23970bd638d9 100644
--- a/arch/arm/mach-rpc/riscpc.c
+++ b/arch/arm/mach-rpc/riscpc.c
@@ -46,7 +46,7 @@ static int __init parse_tag_acorn(const struct tag *tag)
 	switch (tag->u.acorn.vram_pages) {
 	case 512:
 		vram_size += PAGE_SIZE * 256;
-		/* Fall through - ??? */
+		fallthrough;	/* ??? */
 	case 256:
 		vram_size += PAGE_SIZE * 256;
 	default:
diff --git a/arch/arm/mach-tegra/reset.c b/arch/arm/mach-tegra/reset.c
index 76a65df42d10f..d5c805adf7a82 100644
--- a/arch/arm/mach-tegra/reset.c
+++ b/arch/arm/mach-tegra/reset.c
@@ -70,7 +70,7 @@ static void __init tegra_cpu_reset_handler_enable(void)
 	switch (err) {
 	case -ENOSYS:
 		tegra_cpu_reset_handler_set(reset_address);
-		/* fall through */
+		fallthrough;
 	case 0:
 		is_enabled = true;
 		break;
diff --git a/arch/arm/mm/alignment.c b/arch/arm/mm/alignment.c
index f4bfc1cac91aa..ea81e89e77400 100644
--- a/arch/arm/mm/alignment.c
+++ b/arch/arm/mm/alignment.c
@@ -694,7 +694,7 @@ thumb2arm(u16 tinstr)
 			return subset[(L<<1) | ((tinstr & (1<<8)) >> 8)] |
 			    (tinstr & 255);		/* register_list */
 		}
-		/* Else, fall through - for illegal instruction case */
+		fallthrough;	/* for illegal instruction case */
 
 	default:
 		return BAD_INSTR;
@@ -750,7 +750,7 @@ do_alignment_t32_to_handler(u32 *pinstr, struct pt_regs *regs,
 	case 0xe8e0:
 	case 0xe9e0:
 		poffset->un = (tinst2 & 0xff) << 2;
-		/* Fall through */
+		fallthrough;
 
 	case 0xe940:
 	case 0xe9c0:
diff --git a/arch/arm/mm/proc-v7-bugs.c b/arch/arm/mm/proc-v7-bugs.c
index c0fbfca5da8bf..114c05ab4dd91 100644
--- a/arch/arm/mm/proc-v7-bugs.c
+++ b/arch/arm/mm/proc-v7-bugs.c
@@ -71,7 +71,7 @@ static void cpu_v7_spectre_init(void)
 		/* Other ARM CPUs require no workaround */
 		if (read_cpuid_implementor() == ARM_CPU_IMP_ARM)
 			break;
-		/* fallthrough */
+		fallthrough;
 		/* Cortex A57/A72 require firmware workaround */
 	case ARM_CPU_PART_CORTEX_A57:
 	case ARM_CPU_PART_CORTEX_A72: {
diff --git a/arch/arm/plat-omap/dma.c b/arch/arm/plat-omap/dma.c
index b2e9e822426fd..1eb59003bdecd 100644
--- a/arch/arm/plat-omap/dma.c
+++ b/arch/arm/plat-omap/dma.c
@@ -309,14 +309,14 @@ void omap_set_dma_src_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
 		 * not supported by current hardware on OMAP1
 		 * w |= (0x03 << 7);
 		 */
-		/* fall through */
+		fallthrough;
 	case OMAP_DMA_DATA_BURST_16:
 		if (dma_omap2plus()) {
 			burst = 0x3;
 			break;
 		}
 		/* OMAP1 don't support burst 16 */
-		/* fall through */
+		fallthrough;
 	default:
 		BUG();
 	}
@@ -393,7 +393,7 @@ void omap_set_dma_dest_burst_mode(int lch, enum omap_dma_burst_mode burst_mode)
 			break;
 		}
 		/* OMAP1 don't support burst 16 */
-		/* fall through */
+		fallthrough;
 	default:
 		printk(KERN_ERR "Invalid DMA burst mode\n");
 		BUG();
diff --git a/arch/arm/probes/decode.c b/arch/arm/probes/decode.c
index fe81a9c21f2d2..c84053a81358f 100644
--- a/arch/arm/probes/decode.c
+++ b/arch/arm/probes/decode.c
@@ -307,7 +307,7 @@ static bool __kprobes decode_regs(probes_opcode_t *pinsn, u32 regs, bool modify)
 		case REG_TYPE_NOPCWB:
 			if (!is_writeback(insn))
 				break; /* No writeback, so any register is OK */
-			/* fall through... */
+			fallthrough;
 		case REG_TYPE_NOPC:
 		case REG_TYPE_NOPCX:
 			/* Reject PC (R15) */
diff --git a/arch/arm/probes/kprobes/core.c b/arch/arm/probes/kprobes/core.c
index 90b5bc723c83f..feefa2055ebaa 100644
--- a/arch/arm/probes/kprobes/core.c
+++ b/arch/arm/probes/kprobes/core.c
@@ -280,7 +280,7 @@ void __kprobes kprobe_handler(struct pt_regs *regs)
 				/* A nested probe was hit in FIQ, it is a BUG */
 				pr_warn("Unrecoverable kprobe detected.\n");
 				dump_kprobe(p);
-				/* fall through */
+				fallthrough;
 			default:
 				/* impossible cases */
 				BUG();
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
index 4559664011026..a85174d054737 100644
--- a/arch/arm64/kernel/acpi.c
+++ b/arch/arm64/kernel/acpi.c
@@ -322,7 +322,7 @@ void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
 			 */
 			if (memblock_is_map_memory(phys))
 				return (void __iomem *)__phys_to_virt(phys);
-			/* fall through */
+			fallthrough;
 
 		default:
 			if (region->attribute & EFI_MEMORY_WB)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index a389b999482e7..6424584be01e6 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -686,7 +686,7 @@ static s64 arm64_ftr_safe_value(const struct arm64_ftr_bits *ftrp, s64 new,
 	case FTR_HIGHER_OR_ZERO_SAFE:
 		if (!cur || !new)
 			break;
-		/* Fallthrough */
+		fallthrough;
 	case FTR_HIGHER_SAFE:
 		ret = new > cur ? new : cur;
 		break;
diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index 393c6fb1f1cb4..1886a02c3f501 100644
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -327,7 +327,7 @@ static void cpuinfo_detect_icache_policy(struct cpuinfo_arm64 *info)
 		set_bit(ICACHEF_VPIPT, &__icache_flags);
 		break;
 	default:
-		/* Fallthrough */
+		fallthrough;
 	case ICACHE_POLICY_VIPT:
 		/* Assume aliasing */
 		set_bit(ICACHEF_ALIASING, &__icache_flags);
diff --git a/arch/arm64/kernel/hw_breakpoint.c b/arch/arm64/kernel/hw_breakpoint.c
index af234a1e08b7d..712e97c03e54c 100644
--- a/arch/arm64/kernel/hw_breakpoint.c
+++ b/arch/arm64/kernel/hw_breakpoint.c
@@ -257,7 +257,7 @@ static int hw_breakpoint_control(struct perf_event *bp,
 		 * level.
 		 */
 		enable_debug_monitors(dbg_el);
-		/* Fall through */
+		fallthrough;
 	case HW_BREAKPOINT_RESTORE:
 		/* Setup the address register. */
 		write_wb_reg(val_reg, i, info->address);
@@ -541,13 +541,13 @@ int hw_breakpoint_arch_parse(struct perf_event *bp,
 			if (hw->ctrl.len == ARM_BREAKPOINT_LEN_2)
 				break;
 
-			/* Fallthrough */
+			fallthrough;
 		case 3:
 			/* Allow single byte watchpoint. */
 			if (hw->ctrl.len == ARM_BREAKPOINT_LEN_1)
 				break;
 
-			/* Fallthrough */
+			fallthrough;
 		default:
 			return -EINVAL;
 		}
diff --git a/arch/arm64/kernel/module.c b/arch/arm64/kernel/module.c
index 1cd1a4d0ed30e..2a1ad95d9b2cc 100644
--- a/arch/arm64/kernel/module.c
+++ b/arch/arm64/kernel/module.c
@@ -315,21 +315,21 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 		/* MOVW instruction relocations. */
 		case R_AARCH64_MOVW_UABS_G0_NC:
 			overflow_check = false;
-			/* Fall through */
+			fallthrough;
 		case R_AARCH64_MOVW_UABS_G0:
 			ovf = reloc_insn_movw(RELOC_OP_ABS, loc, val, 0,
 					      AARCH64_INSN_IMM_MOVKZ);
 			break;
 		case R_AARCH64_MOVW_UABS_G1_NC:
 			overflow_check = false;
-			/* Fall through */
+			fallthrough;
 		case R_AARCH64_MOVW_UABS_G1:
 			ovf = reloc_insn_movw(RELOC_OP_ABS, loc, val, 16,
 					      AARCH64_INSN_IMM_MOVKZ);
 			break;
 		case R_AARCH64_MOVW_UABS_G2_NC:
 			overflow_check = false;
-			/* Fall through */
+			fallthrough;
 		case R_AARCH64_MOVW_UABS_G2:
 			ovf = reloc_insn_movw(RELOC_OP_ABS, loc, val, 32,
 					      AARCH64_INSN_IMM_MOVKZ);
@@ -397,7 +397,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
 			break;
 		case R_AARCH64_ADR_PREL_PG_HI21_NC:
 			overflow_check = false;
-			/* Fall through */
+			fallthrough;
 		case R_AARCH64_ADR_PREL_PG_HI21:
 			ovf = reloc_insn_adrp(me, sechdrs, loc, val);
 			if (ovf && ovf != -ERANGE)
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 03957a1ae6c0c..355ee9eed4dde 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -151,7 +151,7 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
 			break;
 		}
 		pr_crit("CPU%u: may not have shut down cleanly\n", cpu);
-		/* Fall through */
+		fallthrough;
 	case CPU_STUCK_IN_KERNEL:
 		pr_crit("CPU%u: is stuck in kernel\n", cpu);
 		if (status & CPU_STUCK_REASON_52_BIT_VA)
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index fe6c7d79309d6..5d690d60ccad5 100644
--- a/arch/arm64/kvm/handle_exit.c
+++ b/arch/arm64/kvm/handle_exit.c
@@ -128,7 +128,7 @@ static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu)
 	switch (ESR_ELx_EC(esr)) {
 	case ESR_ELx_EC_WATCHPT_LOW:
 		run->debug.arch.far = vcpu->arch.fault.far_el2;
-		/* fall through */
+		fallthrough;
 	case ESR_ELx_EC_SOFTSTP_LOW:
 	case ESR_ELx_EC_BREAKPT_LOW:
 	case ESR_ELx_EC_BKPT32:
diff --git a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h
index 0297dc63988c0..5e28ea6aa097b 100644
--- a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h
+++ b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h
@@ -21,70 +21,70 @@
 #define save_debug(ptr,reg,nr)						\
 	switch (nr) {							\
 	case 15:	ptr[15] = read_debug(reg, 15);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 14:	ptr[14] = read_debug(reg, 14);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 13:	ptr[13] = read_debug(reg, 13);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 12:	ptr[12] = read_debug(reg, 12);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 11:	ptr[11] = read_debug(reg, 11);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 10:	ptr[10] = read_debug(reg, 10);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 9:		ptr[9] = read_debug(reg, 9);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 8:		ptr[8] = read_debug(reg, 8);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 7:		ptr[7] = read_debug(reg, 7);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 6:		ptr[6] = read_debug(reg, 6);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 5:		ptr[5] = read_debug(reg, 5);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 4:		ptr[4] = read_debug(reg, 4);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 3:		ptr[3] = read_debug(reg, 3);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 2:		ptr[2] = read_debug(reg, 2);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 1:		ptr[1] = read_debug(reg, 1);			\
-			/* Fall through */				\
+			fallthrough;					\
 	default:	ptr[0] = read_debug(reg, 0);			\
 	}
 
 #define restore_debug(ptr,reg,nr)					\
 	switch (nr) {							\
 	case 15:	write_debug(ptr[15], reg, 15);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 14:	write_debug(ptr[14], reg, 14);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 13:	write_debug(ptr[13], reg, 13);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 12:	write_debug(ptr[12], reg, 12);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 11:	write_debug(ptr[11], reg, 11);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 10:	write_debug(ptr[10], reg, 10);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 9:		write_debug(ptr[9], reg, 9);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 8:		write_debug(ptr[8], reg, 8);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 7:		write_debug(ptr[7], reg, 7);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 6:		write_debug(ptr[6], reg, 6);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 5:		write_debug(ptr[5], reg, 5);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 4:		write_debug(ptr[4], reg, 4);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 3:		write_debug(ptr[3], reg, 3);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 2:		write_debug(ptr[2], reg, 2);			\
-			/* Fall through */				\
+			fallthrough;					\
 	case 1:		write_debug(ptr[1], reg, 1);			\
-			/* Fall through */				\
+			fallthrough;					\
 	default:	write_debug(ptr[0], reg, 0);			\
 	}
 
diff --git a/arch/arm64/kvm/hyp/vgic-v3-sr.c b/arch/arm64/kvm/hyp/vgic-v3-sr.c
index 5a0073511efb6..452f4cacd6743 100644
--- a/arch/arm64/kvm/hyp/vgic-v3-sr.c
+++ b/arch/arm64/kvm/hyp/vgic-v3-sr.c
@@ -340,10 +340,10 @@ void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if)
 	case 7:
 		cpu_if->vgic_ap0r[3] = __vgic_v3_read_ap0rn(3);
 		cpu_if->vgic_ap0r[2] = __vgic_v3_read_ap0rn(2);
-		/* Fall through */
+		fallthrough;
 	case 6:
 		cpu_if->vgic_ap0r[1] = __vgic_v3_read_ap0rn(1);
-		/* Fall through */
+		fallthrough;
 	default:
 		cpu_if->vgic_ap0r[0] = __vgic_v3_read_ap0rn(0);
 	}
@@ -352,10 +352,10 @@ void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if)
 	case 7:
 		cpu_if->vgic_ap1r[3] = __vgic_v3_read_ap1rn(3);
 		cpu_if->vgic_ap1r[2] = __vgic_v3_read_ap1rn(2);
-		/* Fall through */
+		fallthrough;
 	case 6:
 		cpu_if->vgic_ap1r[1] = __vgic_v3_read_ap1rn(1);
-		/* Fall through */
+		fallthrough;
 	default:
 		cpu_if->vgic_ap1r[0] = __vgic_v3_read_ap1rn(0);
 	}
@@ -373,10 +373,10 @@ void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if)
 	case 7:
 		__vgic_v3_write_ap0rn(cpu_if->vgic_ap0r[3], 3);
 		__vgic_v3_write_ap0rn(cpu_if->vgic_ap0r[2], 2);
-		/* Fall through */
+		fallthrough;
 	case 6:
 		__vgic_v3_write_ap0rn(cpu_if->vgic_ap0r[1], 1);
-		/* Fall through */
+		fallthrough;
 	default:
 		__vgic_v3_write_ap0rn(cpu_if->vgic_ap0r[0], 0);
 	}
@@ -385,10 +385,10 @@ void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if)
 	case 7:
 		__vgic_v3_write_ap1rn(cpu_if->vgic_ap1r[3], 3);
 		__vgic_v3_write_ap1rn(cpu_if->vgic_ap1r[2], 2);
-		/* Fall through */
+		fallthrough;
 	case 6:
 		__vgic_v3_write_ap1rn(cpu_if->vgic_ap1r[1], 1);
-		/* Fall through */
+		fallthrough;
 	default:
 		__vgic_v3_write_ap1rn(cpu_if->vgic_ap1r[0], 0);
 	}
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index a206655a39a52..9b11c096a0423 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -45,7 +45,7 @@ static u32 get_cpu_asid_bits(void)
 	default:
 		pr_warn("CPU%d: Unknown ASID size (%d); assuming 8-bit\n",
 					smp_processor_id(),  fld);
-		/* Fallthrough */
+		fallthrough;
 	case 0:
 		asid = 8;
 		break;
diff --git a/arch/c6x/kernel/signal.c b/arch/c6x/kernel/signal.c
index e456652facce5..d05c78eace1bf 100644
--- a/arch/c6x/kernel/signal.c
+++ b/arch/c6x/kernel/signal.c
@@ -220,7 +220,7 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
 			regs->a4 = -EINTR;
 			break;
 		}
-	/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 do_restart:
 		regs->a4 = regs->orig_a4;
@@ -252,7 +252,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs,
 				break;
 			}
 
-			/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->a4 = regs->orig_a4;
 			regs->pc -= 4;
diff --git a/arch/csky/kernel/signal.c b/arch/csky/kernel/signal.c
index 9452d6570b7e8..970895df75ec3 100644
--- a/arch/csky/kernel/signal.c
+++ b/arch/csky/kernel/signal.c
@@ -194,7 +194,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->a0 = -EINTR;
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->a0 = regs->orig_a0;
 			regs->pc -= TRAP0_SIZE;
diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c
index 38d335488a54b..69e68949787fe 100644
--- a/arch/h8300/kernel/signal.c
+++ b/arch/h8300/kernel/signal.c
@@ -227,7 +227,7 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka)
 			regs->er0 = -EINTR;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 do_restart:
 		regs->er0 = regs->orig_er0;
diff --git a/arch/hexagon/kernel/module.c b/arch/hexagon/kernel/module.c
index cf99fb79a1241..cb3bf19b06400 100644
--- a/arch/hexagon/kernel/module.c
+++ b/arch/hexagon/kernel/module.c
@@ -120,7 +120,7 @@ int apply_relocate_add(Elf_Shdr *sechdrs, const char *strtab,
 		}
 		case R_HEXAGON_HI16:
 			value = (value>>16) & 0xffff;
-			/* fallthrough */
+			fallthrough;
 		case R_HEXAGON_LO16:
 			*location &= ~0x00c03fff;
 			*location |= value & 0x3fff;
diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c
index d48864c48e5ac..94cc7ff52dce8 100644
--- a/arch/hexagon/kernel/signal.c
+++ b/arch/hexagon/kernel/signal.c
@@ -155,7 +155,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->r00 = -EINTR;
 				break;
 			}
-			/* Fall through */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->r06 = regs->syscall_nr;
 			pt_set_elr(regs, pt_elr(regs) - 4);
diff --git a/arch/ia64/kernel/crash.c b/arch/ia64/kernel/crash.c
index bec762a9b418d..fec70d662d0c2 100644
--- a/arch/ia64/kernel/crash.c
+++ b/arch/ia64/kernel/crash.c
@@ -163,7 +163,7 @@ kdump_init_notifier(struct notifier_block *self, unsigned long val, void *data)
 		case DIE_INIT_MONARCH_LEAVE:
 			if (!kdump_freeze_monarch)
 				break;
-			/* fall through */
+			fallthrough;
 		case DIE_INIT_SLAVE_LEAVE:
 		case DIE_INIT_MONARCH_ENTER:
 		case DIE_MCA_RENDZVOUS_LEAVE:
diff --git a/arch/ia64/kernel/module.c b/arch/ia64/kernel/module.c
index 1a42ba885188a..00a496cb346f6 100644
--- a/arch/ia64/kernel/module.c
+++ b/arch/ia64/kernel/module.c
@@ -654,7 +654,7 @@ do_reloc (struct module *mod, uint8_t r_type, Elf64_Sym *sym, uint64_t addend,
 				}
 			} else if (!is_internal(mod, val))
 				val = get_plt(mod, location, val, &ok);
-			/* FALL THROUGH */
+			fallthrough;
 		      default:
 			val -= bundle(location);
 			break;
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 971f166873aa6..0dc3611e79715 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -3472,7 +3472,7 @@ pfm_restart(pfm_context_t *ctx, void *arg, int count, struct pt_regs *regs)
 			break;
 		case PFM_CTX_LOADED: 
 			if (CTX_HAS_SMPL(ctx) && fmt->fmt_restart_active) break;
-			/* fall through */
+			fallthrough;
 		case PFM_CTX_UNLOADED:
 		case PFM_CTX_ZOMBIE:
 			DPRINT(("invalid state=%d\n", state));
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index d07ed65c9c6e9..e67b22fc3c60b 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -374,7 +374,7 @@ ia64_do_signal (struct sigscratch *scr, long in_syscall)
 					/* note: scr->pt.r10 is already -1 */
 					break;
 				}
-				/*FALLTHRU*/
+				fallthrough;
 			case ERESTARTNOINTR:
 				ia64_decrement_ip(&scr->pt);
 				restart = 0; /* don't restart twice if handle_signal() fails... */
diff --git a/arch/ia64/kernel/unaligned.c b/arch/ia64/kernel/unaligned.c
index 2d4e65ba5c3e9..6c1a8951dfbb8 100644
--- a/arch/ia64/kernel/unaligned.c
+++ b/arch/ia64/kernel/unaligned.c
@@ -1431,7 +1431,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
 		if (u.insn.x)
 			/* oops, really a semaphore op (cmpxchg, etc) */
 			goto failure;
-		/*FALLTHRU*/
+		fallthrough;
 	      case LDS_IMM_OP:
 	      case LDSA_IMM_OP:
 	      case LDFS_OP:
@@ -1459,7 +1459,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
 		if (u.insn.x)
 			/* oops, really a semaphore op (cmpxchg, etc) */
 			goto failure;
-		/*FALLTHRU*/
+		fallthrough;
 	      case LD_IMM_OP:
 	      case LDA_IMM_OP:
 	      case LDBIAS_IMM_OP:
@@ -1475,7 +1475,7 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs)
 		if (u.insn.x)
 			/* oops, really a semaphore op (cmpxchg, etc) */
 			goto failure;
-		/*FALLTHRU*/
+		fallthrough;
 	      case ST_IMM_OP:
 	      case STREL_IMM_OP:
 		ret = emulate_store_int(ifa, u.insn, regs);
diff --git a/arch/ia64/kernel/unwind.c b/arch/ia64/kernel/unwind.c
index 7601fe0622d25..6bd64c35e691a 100644
--- a/arch/ia64/kernel/unwind.c
+++ b/arch/ia64/kernel/unwind.c
@@ -324,7 +324,7 @@ unw_access_gr (struct unw_frame_info *info, int regnum, unsigned long *val, char
 							return 0;
 						}
 					}
-					/* fall through */
+					fallthrough;
 				      case UNW_NAT_NONE:
 					dummy_nat = 0;
 					nat_addr = &dummy_nat;
diff --git a/arch/m68k/atari/atakeyb.c b/arch/m68k/atari/atakeyb.c
index 37091898adb3d..5e0e682f9c61a 100644
--- a/arch/m68k/atari/atakeyb.c
+++ b/arch/m68k/atari/atakeyb.c
@@ -207,7 +207,7 @@ static irqreturn_t atari_keyboard_interrupt(int irq, void *dummy)
 					self_test_last_rcv = jiffies;
 					break;
 				}
-				/* FALL THROUGH */
+				fallthrough;
 
 			default:
 				break_flag = scancode & BREAK_MASK;
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index fc034fd19798e..a98fca9770737 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -1067,7 +1067,7 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
 			regs->d0 = -EINTR;
 			break;
 		}
-	/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 	do_restart:
 		regs->d0 = regs->orig_d0;
diff --git a/arch/m68k/mac/config.c b/arch/m68k/mac/config.c
index 5c9f3a2d65388..a621fcc1a576a 100644
--- a/arch/m68k/mac/config.c
+++ b/arch/m68k/mac/config.c
@@ -1018,7 +1018,7 @@ int __init mac_platform_init(void)
 		 */
 		platform_device_register_simple("mac_scsi", 1,
 			mac_scsi_duo_rsrc, ARRAY_SIZE(mac_scsi_duo_rsrc));
-		/* fall through */
+		fallthrough;
 	case MAC_SCSI_OLD:
 		/* Addresses from Developer Notes for Duo System,
 		 * PowerBook 180 & 160, 140 & 170, Macintosh IIsi
diff --git a/arch/m68k/mac/via.c b/arch/m68k/mac/via.c
index 1f0fad2a98a07..ac77d73af19a5 100644
--- a/arch/m68k/mac/via.c
+++ b/arch/m68k/mac/via.c
@@ -370,7 +370,7 @@ void via_nubus_irq_startup(int irq)
 			/* Allow NuBus slots 9 through F. */
 			via2[vDirA] &= 0x80 | ~(1 << irq_idx);
 		}
-		/* fall through */
+		fallthrough;
 	case MAC_VIA_IICI:
 		via_irq_enable(irq);
 		break;
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index 795f483b10509..ef46e77e97a5b 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -118,7 +118,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
 	pr_debug("do_page_fault: good_area\n");
 	switch (error_code & 3) {
 		default:	/* 3: write, present */
-			/* fall through */
+			fallthrough;
 		case 2:		/* write, not present */
 			if (!(vma->vm_flags & VM_WRITE))
 				goto acc_err;
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 65bf5fd8d4733..4a96b59f0beed 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -249,7 +249,7 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler)
 			regs->r3 = -EINTR;
 			break;
 	}
-	/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 do_restart:
 		/* offset of 4 bytes to re-execute trap (brki) instruction */
diff --git a/arch/mips/include/asm/unroll.h b/arch/mips/include/asm/unroll.h
index 7dd4a80e05d6d..6f4ac854b12d2 100644
--- a/arch/mips/include/asm/unroll.h
+++ b/arch/mips/include/asm/unroll.h
@@ -28,38 +28,38 @@
 	BUILD_BUG_ON(!__builtin_constant_p(times));		\
 								\
 	switch (times) {					\
-	case 32: fn(__VA_ARGS__); /* fall through */		\
-	case 31: fn(__VA_ARGS__); /* fall through */		\
-	case 30: fn(__VA_ARGS__); /* fall through */		\
-	case 29: fn(__VA_ARGS__); /* fall through */		\
-	case 28: fn(__VA_ARGS__); /* fall through */		\
-	case 27: fn(__VA_ARGS__); /* fall through */		\
-	case 26: fn(__VA_ARGS__); /* fall through */		\
-	case 25: fn(__VA_ARGS__); /* fall through */		\
-	case 24: fn(__VA_ARGS__); /* fall through */		\
-	case 23: fn(__VA_ARGS__); /* fall through */		\
-	case 22: fn(__VA_ARGS__); /* fall through */		\
-	case 21: fn(__VA_ARGS__); /* fall through */		\
-	case 20: fn(__VA_ARGS__); /* fall through */		\
-	case 19: fn(__VA_ARGS__); /* fall through */		\
-	case 18: fn(__VA_ARGS__); /* fall through */		\
-	case 17: fn(__VA_ARGS__); /* fall through */		\
-	case 16: fn(__VA_ARGS__); /* fall through */		\
-	case 15: fn(__VA_ARGS__); /* fall through */		\
-	case 14: fn(__VA_ARGS__); /* fall through */		\
-	case 13: fn(__VA_ARGS__); /* fall through */		\
-	case 12: fn(__VA_ARGS__); /* fall through */		\
-	case 11: fn(__VA_ARGS__); /* fall through */		\
-	case 10: fn(__VA_ARGS__); /* fall through */		\
-	case 9: fn(__VA_ARGS__); /* fall through */		\
-	case 8: fn(__VA_ARGS__); /* fall through */		\
-	case 7: fn(__VA_ARGS__); /* fall through */		\
-	case 6: fn(__VA_ARGS__); /* fall through */		\
-	case 5: fn(__VA_ARGS__); /* fall through */		\
-	case 4: fn(__VA_ARGS__); /* fall through */		\
-	case 3: fn(__VA_ARGS__); /* fall through */		\
-	case 2: fn(__VA_ARGS__); /* fall through */		\
-	case 1: fn(__VA_ARGS__); /* fall through */		\
+	case 32: fn(__VA_ARGS__); fallthrough;			\
+	case 31: fn(__VA_ARGS__); fallthrough;			\
+	case 30: fn(__VA_ARGS__); fallthrough;			\
+	case 29: fn(__VA_ARGS__); fallthrough;			\
+	case 28: fn(__VA_ARGS__); fallthrough;			\
+	case 27: fn(__VA_ARGS__); fallthrough;			\
+	case 26: fn(__VA_ARGS__); fallthrough;			\
+	case 25: fn(__VA_ARGS__); fallthrough;			\
+	case 24: fn(__VA_ARGS__); fallthrough;			\
+	case 23: fn(__VA_ARGS__); fallthrough;			\
+	case 22: fn(__VA_ARGS__); fallthrough;			\
+	case 21: fn(__VA_ARGS__); fallthrough;			\
+	case 20: fn(__VA_ARGS__); fallthrough;			\
+	case 19: fn(__VA_ARGS__); fallthrough;			\
+	case 18: fn(__VA_ARGS__); fallthrough;			\
+	case 17: fn(__VA_ARGS__); fallthrough;			\
+	case 16: fn(__VA_ARGS__); fallthrough;			\
+	case 15: fn(__VA_ARGS__); fallthrough;			\
+	case 14: fn(__VA_ARGS__); fallthrough;			\
+	case 13: fn(__VA_ARGS__); fallthrough;			\
+	case 12: fn(__VA_ARGS__); fallthrough;			\
+	case 11: fn(__VA_ARGS__); fallthrough;			\
+	case 10: fn(__VA_ARGS__); fallthrough;			\
+	case 9: fn(__VA_ARGS__); fallthrough;			\
+	case 8: fn(__VA_ARGS__); fallthrough;			\
+	case 7: fn(__VA_ARGS__); fallthrough;			\
+	case 6: fn(__VA_ARGS__); fallthrough;			\
+	case 5: fn(__VA_ARGS__); fallthrough;			\
+	case 4: fn(__VA_ARGS__); fallthrough;			\
+	case 3: fn(__VA_ARGS__); fallthrough;			\
+	case 2: fn(__VA_ARGS__); fallthrough;			\
+	case 1: fn(__VA_ARGS__); fallthrough;			\
 	case 0: break;						\
 								\
 	default:						\
diff --git a/arch/nds32/kernel/fpu.c b/arch/nds32/kernel/fpu.c
index 62bdafbc53f4c..9edd7ed7d7bf8 100644
--- a/arch/nds32/kernel/fpu.c
+++ b/arch/nds32/kernel/fpu.c
@@ -45,7 +45,7 @@ void save_fpu(struct task_struct *tsk)
 			      :	/* no output */
 			      : "r" (&tsk->thread.fpu)
 			      : "memory");
-		/* fall through */
+		fallthrough;
 	case SP32_DP16_reg:
 		asm volatile ("fsdi $fd15, [%0+0x78]\n\t"
 			      "fsdi $fd14, [%0+0x70]\n\t"
@@ -58,7 +58,7 @@ void save_fpu(struct task_struct *tsk)
 			      :	/* no output */
 			      : "r" (&tsk->thread.fpu)
 			      : "memory");
-		/* fall through */
+		fallthrough;
 	case SP16_DP8_reg:
 		asm volatile ("fsdi $fd7,  [%0+0x38]\n\t"
 			      "fsdi $fd6,  [%0+0x30]\n\t"
@@ -67,7 +67,7 @@ void save_fpu(struct task_struct *tsk)
 			      :	/* no output */
 			      : "r" (&tsk->thread.fpu)
 			      : "memory");
-		/* fall through */
+		fallthrough;
 	case SP8_DP4_reg:
 		asm volatile ("fsdi $fd3,  [%1+0x18]\n\t"
 			      "fsdi $fd2,  [%1+0x10]\n\t"
@@ -108,7 +108,7 @@ void load_fpu(const struct fpu_struct *fpregs)
 			      "fldi $fd16, [%0+0x80]\n\t"
 			      :	/* no output */
 			      : "r" (fpregs));
-		/* fall through */
+		fallthrough;
 	case SP32_DP16_reg:
 		asm volatile ("fldi $fd15, [%0+0x78]\n\t"
 			      "fldi $fd14, [%0+0x70]\n\t"
@@ -120,7 +120,7 @@ void load_fpu(const struct fpu_struct *fpregs)
 			      "fldi $fd8,  [%0+0x40]\n\t"
 			      :	/* no output */
 			      : "r" (fpregs));
-		/* fall through */
+		fallthrough;
 	case SP16_DP8_reg:
 		asm volatile ("fldi $fd7,  [%0+0x38]\n\t"
 			      "fldi $fd6,  [%0+0x30]\n\t"
@@ -128,7 +128,7 @@ void load_fpu(const struct fpu_struct *fpregs)
 			      "fldi $fd4,  [%0+0x20]\n\t"
 			      :	/* no output */
 			      : "r" (fpregs));
-		/* fall through */
+		fallthrough;
 	case SP8_DP4_reg:
 		asm volatile ("fldi $fd3,  [%1+0x18]\n\t"
 			      "fldi $fd2,  [%1+0x10]\n\t"
diff --git a/arch/nds32/kernel/signal.c b/arch/nds32/kernel/signal.c
index 330b19fcd9903..36e25a410bb0e 100644
--- a/arch/nds32/kernel/signal.c
+++ b/arch/nds32/kernel/signal.c
@@ -316,7 +316,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->uregs[0] = -EINTR;
 				break;
 			}
-			/* Else, fall through */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->uregs[0] = regs->orig_r0;
 			regs->ipc -= 4;
@@ -361,7 +361,7 @@ static void do_signal(struct pt_regs *regs)
 		switch (regs->uregs[0]) {
 		case -ERESTART_RESTARTBLOCK:
 			regs->uregs[15] = __NR_restart_syscall;
-			/* Fall through */
+			fallthrough;
 		case -ERESTARTNOHAND:
 		case -ERESTARTSYS:
 		case -ERESTARTNOINTR:
diff --git a/arch/openrisc/kernel/signal.c b/arch/openrisc/kernel/signal.c
index 97804f21a40c8..c779364f0cd09 100644
--- a/arch/openrisc/kernel/signal.c
+++ b/arch/openrisc/kernel/signal.c
@@ -244,7 +244,7 @@ int do_signal(struct pt_regs *regs, int syscall)
 		switch (retval) {
 		case -ERESTART_RESTARTBLOCK:
 			restart = -2;
-			/* Fall through */
+			fallthrough;
 		case -ERESTARTNOHAND:
 		case -ERESTARTSYS:
 		case -ERESTARTNOINTR:
diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index 5df5d4cd5d4cf..3c037fc960387 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -502,7 +502,7 @@ syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
 			regs->gr[28] = -EINTR;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case -ERESTARTNOINTR:
 		check_syscallno_in_delay_branch(regs);
 		break;
diff --git a/arch/parisc/kernel/traps.c b/arch/parisc/kernel/traps.c
index 43875c289723e..a52c7abf2ca49 100644
--- a/arch/parisc/kernel/traps.c
+++ b/arch/parisc/kernel/traps.c
@@ -437,7 +437,6 @@ void parisc_terminate(char *msg, struct pt_regs *regs, int code, unsigned long o
 		break;
 
 	default:
-		/* Fall through */
 		break;
 
 	}
@@ -644,12 +643,12 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 
 	case 15:
 		/* Data TLB miss fault/Data page fault */
-		/* Fall through */
+		fallthrough;
 	case 16:
 		/* Non-access instruction TLB miss fault */
 		/* The instruction TLB entry needed for the target address of the FIC
 		   is absent, and hardware can't find it, so we get to cleanup */
-		/* Fall through */
+		fallthrough;
 	case 17:
 		/* Non-access data TLB miss fault/Non-access data page fault */
 		/* FIXME: 
@@ -673,7 +672,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 			handle_unaligned(regs);
 			return;
 		}
-		/* Fall Through */
+		fallthrough;
 	case 26: 
 		/* PCXL: Data memory access rights trap */
 		fault_address = regs->ior;
@@ -683,7 +682,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 	case 19:
 		/* Data memory break trap */
 		regs->gr[0] |= PSW_X; /* So we can single-step over the trap */
-		/* fall thru */
+		fallthrough;
 	case 21:
 		/* Page reference trap */
 		handle_gdb_break(regs, TRAP_HWBKPT);
@@ -730,7 +729,7 @@ void notrace handle_interruption(int code, struct pt_regs *regs)
 			}
 			mmap_read_unlock(current->mm);
 		}
-		/* Fall Through */
+		fallthrough;
 	case 27: 
 		/* Data memory protection ID trap */
 		if (code == 27 && !user_mode(regs) &&
diff --git a/arch/parisc/mm/fault.c b/arch/parisc/mm/fault.c
index 4bfe2da9fbe3a..716960f5d92ea 100644
--- a/arch/parisc/mm/fault.c
+++ b/arch/parisc/mm/fault.c
@@ -67,7 +67,7 @@ parisc_acctyp(unsigned long code, unsigned int inst)
 	case 0x30000000: /* coproc2 */
 		if (bit22set(inst))
 			return VM_WRITE;
-		/* fall through */
+		fallthrough;
 
 	case 0x0: /* indexed/memory management */
 		if (bit22set(inst)) {
@@ -370,7 +370,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long code,
 			}
 
 			/* probably address is outside of mapped file */
-			/* fall through */
+			fallthrough;
 		case 17:	/* NA data TLB miss / page fault */
 		case 18:	/* Unaligned access - PCXS only */
 			signo = SIGBUS;
diff --git a/arch/powerpc/net/bpf_jit_comp.c b/arch/powerpc/net/bpf_jit_comp.c
index 16d09b36fe063..78d61f97371e1 100644
--- a/arch/powerpc/net/bpf_jit_comp.c
+++ b/arch/powerpc/net/bpf_jit_comp.c
@@ -475,7 +475,7 @@ static int bpf_jit_build_body(struct bpf_prog *fp, u32 *image,
 		case BPF_JMP | BPF_JSET | BPF_K:
 		case BPF_JMP | BPF_JSET | BPF_X:
 			true_cond = COND_NE;
-			/* Fall through */
+			fallthrough;
 		cond_branch:
 			/* same targets, can avoid doing the test :) */
 			if (filter[i].jt == filter[i].jf) {
diff --git a/arch/riscv/kernel/signal.c b/arch/riscv/kernel/signal.c
index 17ba190e84a53..e996e08f1061e 100644
--- a/arch/riscv/kernel/signal.c
+++ b/arch/riscv/kernel/signal.c
@@ -250,7 +250,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->a0 = -EINTR;
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
                         regs->a0 = regs->orig_a0;
 			regs->epc -= 0x4;
diff --git a/arch/riscv/net/bpf_jit_comp32.c b/arch/riscv/net/bpf_jit_comp32.c
index bc5f2204693fc..579575f9cdae0 100644
--- a/arch/riscv/net/bpf_jit_comp32.c
+++ b/arch/riscv/net/bpf_jit_comp32.c
@@ -1020,7 +1020,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
 			emit_zext64(dst, ctx);
 			break;
 		}
-		/* Fallthrough. */
+		fallthrough;
 
 	case BPF_ALU | BPF_ADD | BPF_X:
 	case BPF_ALU | BPF_SUB | BPF_X:
@@ -1079,7 +1079,7 @@ int bpf_jit_emit_insn(const struct bpf_insn *insn, struct rv_jit_context *ctx,
 		case 16:
 			emit(rv_slli(lo(rd), lo(rd), 16), ctx);
 			emit(rv_srli(lo(rd), lo(rd), 16), ctx);
-			/* Fallthrough. */
+			fallthrough;
 		case 32:
 			if (!ctx->prog->aux->verifier_zext)
 				emit(rv_addi(hi(rd), RV_REG_ZERO, 0), ctx);
diff --git a/arch/sh/drivers/platform_early.c b/arch/sh/drivers/platform_early.c
index f3dc3f25b3ff0..143747c45206f 100644
--- a/arch/sh/drivers/platform_early.c
+++ b/arch/sh/drivers/platform_early.c
@@ -246,7 +246,7 @@ static int __init sh_early_platform_driver_probe_id(char *class_str,
 		case EARLY_PLATFORM_ID_ERROR:
 			pr_warn("%s: unable to parse %s parameter\n",
 				class_str, epdrv->pdrv->driver.name);
-			/* fall-through */
+			fallthrough;
 		case EARLY_PLATFORM_ID_UNSET:
 			match = NULL;
 			break;
diff --git a/arch/sh/kernel/disassemble.c b/arch/sh/kernel/disassemble.c
index 08e1af63edd96..34e25a439c811 100644
--- a/arch/sh/kernel/disassemble.c
+++ b/arch/sh/kernel/disassemble.c
@@ -486,7 +486,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
 					pr_cont("xd%d", rn & ~1);
 					break;
 				}
-				/* else, fall through */
+				fallthrough;
 			case D_REG_N:
 				pr_cont("dr%d", rn);
 				break;
@@ -495,7 +495,7 @@ static void print_sh_insn(u32 memaddr, u16 insn)
 					pr_cont("xd%d", rm & ~1);
 					break;
 				}
-				/* else, fall through */
+				fallthrough;
 			case D_REG_M:
 				pr_cont("dr%d", rm);
 				break;
diff --git a/arch/sh/kernel/kgdb.c b/arch/sh/kernel/kgdb.c
index 0d5f3c9d52f30..e4147efa9ec6d 100644
--- a/arch/sh/kernel/kgdb.c
+++ b/arch/sh/kernel/kgdb.c
@@ -266,7 +266,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 		ptr = &remcomInBuffer[1];
 		if (kgdb_hex2long(&ptr, &addr))
 			linux_regs->pc = addr;
-		/* fallthrough */
+		fallthrough;
 	case 'D':
 	case 'k':
 		atomic_set(&kgdb_cpu_doing_single_step, -1);
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index a0fbb8427b391..4fe3f00137bc0 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -418,7 +418,7 @@ handle_syscall_restart(unsigned long save_r0, struct pt_regs *regs,
 		case -ERESTARTSYS:
 			if (!(sa->sa_flags & SA_RESTART))
 				goto no_system_call_restart;
-		/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->regs[0] = save_r0;
 			regs->pc -= instruction_size(__raw_readw(regs->pc - 4));
diff --git a/arch/sparc/kernel/auxio_64.c b/arch/sparc/kernel/auxio_64.c
index 4843f48bfe85f..774a82b0c649f 100644
--- a/arch/sparc/kernel/auxio_64.c
+++ b/arch/sparc/kernel/auxio_64.c
@@ -87,7 +87,6 @@ void auxio_set_lte(int on)
 		__auxio_sbus_set_lte(on);
 		break;
 	case AUXIO_TYPE_EBUS:
-		/* FALL-THROUGH */
 	default:
 		break;
 	}
diff --git a/arch/sparc/kernel/central.c b/arch/sparc/kernel/central.c
index bfae98ab86381..23f8838dd96e3 100644
--- a/arch/sparc/kernel/central.c
+++ b/arch/sparc/kernel/central.c
@@ -55,7 +55,7 @@ static int clock_board_calc_nslots(struct clock_board *p)
 			else
 				return 5;
 		}
-		/* Fallthrough */
+		fallthrough;
 	default:
 		return 4;
 	}
diff --git a/arch/sparc/kernel/kgdb_32.c b/arch/sparc/kernel/kgdb_32.c
index 7580775a14b9e..58ad3f7de1fb5 100644
--- a/arch/sparc/kernel/kgdb_32.c
+++ b/arch/sparc/kernel/kgdb_32.c
@@ -122,7 +122,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 			linux_regs->pc = addr;
 			linux_regs->npc = addr + 4;
 		}
-		/* fall through */
+		fallthrough;
 
 	case 'D':
 	case 'k':
diff --git a/arch/sparc/kernel/kgdb_64.c b/arch/sparc/kernel/kgdb_64.c
index 5d6c2d287e855..177746ae2c817 100644
--- a/arch/sparc/kernel/kgdb_64.c
+++ b/arch/sparc/kernel/kgdb_64.c
@@ -148,7 +148,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 			linux_regs->tpc = addr;
 			linux_regs->tnpc = addr + 4;
 		}
-		/* fall through */
+		fallthrough;
 
 	case 'D':
 	case 'k':
diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index c0886b400dad2..2a12c86af956e 100644
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -359,7 +359,7 @@ int __init pcr_arch_init(void)
 		 * counter overflow interrupt so we can't make use of
 		 * their hardware currently.
 		 */
-		/* fallthrough */
+		fallthrough;
 	default:
 		err = -ENODEV;
 		goto out_unregister;
diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index da8902295c8c3..3df960c137f76 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -224,7 +224,7 @@ void __init of_console_init(void)
 
 		case PROMDEV_TTYB:
 			skip = 1;
-			/* FALLTHRU */
+			fallthrough;
 
 		case PROMDEV_TTYA:
 			type = "serial";
diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c
index e2c6f0abda009..e9695a06492ff 100644
--- a/arch/sparc/kernel/signal32.c
+++ b/arch/sparc/kernel/signal32.c
@@ -646,7 +646,7 @@ static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs
 	case ERESTARTSYS:
 		if (!(sa->sa_flags & SA_RESTART))
 			goto no_system_call_restart;
-		/* fallthrough */
+		fallthrough;
 	case ERESTARTNOINTR:
 		regs->u_regs[UREG_I0] = orig_i0;
 		regs->tpc -= 4;
@@ -686,7 +686,7 @@ void do_signal32(struct pt_regs * regs)
 				regs->tpc -= 4;
 				regs->tnpc -= 4;
 				pt_regs_clear_syscall(regs);
-				/* fall through */
+				fallthrough;
 			case ERESTART_RESTARTBLOCK:
 				regs->u_regs[UREG_G1] = __NR_restart_syscall;
 				regs->tpc -= 4;
diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c
index f1f8c8ebe641d..d0e0025ee3ba8 100644
--- a/arch/sparc/kernel/signal_32.c
+++ b/arch/sparc/kernel/signal_32.c
@@ -440,7 +440,7 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
 	case ERESTARTSYS:
 		if (!(sa->sa_flags & SA_RESTART))
 			goto no_system_call_restart;
-		/* fallthrough */
+		fallthrough;
 	case ERESTARTNOINTR:
 		regs->u_regs[UREG_I0] = orig_i0;
 		regs->pc -= 4;
@@ -506,7 +506,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 				regs->pc -= 4;
 				regs->npc -= 4;
 				pt_regs_clear_syscall(regs);
-				/* fall through */
+				fallthrough;
 			case ERESTART_RESTARTBLOCK:
 				regs->u_regs[UREG_G1] = __NR_restart_syscall;
 				regs->pc -= 4;
diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c
index 6937339a272c5..255264bcb46a7 100644
--- a/arch/sparc/kernel/signal_64.c
+++ b/arch/sparc/kernel/signal_64.c
@@ -461,7 +461,7 @@ static inline void syscall_restart(unsigned long orig_i0, struct pt_regs *regs,
 	case ERESTARTSYS:
 		if (!(sa->sa_flags & SA_RESTART))
 			goto no_system_call_restart;
-		/* fallthrough */
+		fallthrough;
 	case ERESTARTNOINTR:
 		regs->u_regs[UREG_I0] = orig_i0;
 		regs->tpc -= 4;
@@ -532,7 +532,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
 				regs->tpc -= 4;
 				regs->tnpc -= 4;
 				pt_regs_clear_syscall(regs);
-				/* fall through */
+				fallthrough;
 			case ERESTART_RESTARTBLOCK:
 				regs->u_regs[UREG_G1] = __NR_restart_syscall;
 				regs->tpc -= 4;
diff --git a/arch/sparc/math-emu/math_32.c b/arch/sparc/math-emu/math_32.c
index 72e560ef4a091..d5beec8561460 100644
--- a/arch/sparc/math-emu/math_32.c
+++ b/arch/sparc/math-emu/math_32.c
@@ -359,7 +359,7 @@ static int do_one_mathemu(u32 insn, unsigned long *pfsr, unsigned long *fregs)
 			*pfsr |= (6 << 14);
 			return 0;			/* simulate invalid_fp_register exception */
 		}
-	/* fall through */
+		fallthrough;
 	case 2:
 		if (freg & 1) {				/* doublewords must have bit 5 zeroed */
 			*pfsr |= (6 << 14);
@@ -380,7 +380,7 @@ static int do_one_mathemu(u32 insn, unsigned long *pfsr, unsigned long *fregs)
 			*pfsr |= (6 << 14);
 			return 0;			/* simulate invalid_fp_register exception */
 		}
-	/* fall through */
+		fallthrough;
 	case 2:
 		if (freg & 1) {				/* doublewords must have bit 5 zeroed */
 			*pfsr |= (6 << 14);
@@ -408,13 +408,13 @@ static int do_one_mathemu(u32 insn, unsigned long *pfsr, unsigned long *fregs)
 			*pfsr |= (6 << 14);
 			return 0;			/* simulate invalid_fp_register exception */
 		}
-	/* fall through */
+		fallthrough;
 	case 2:
 		if (freg & 1) {				/* doublewords must have bit 5 zeroed */
 			*pfsr |= (6 << 14);
 			return 0;
 		}
-	/* fall through */
+		fallthrough;
 	case 1:
 		rd = (void *)&fregs[freg];
 		break;
diff --git a/arch/sparc/net/bpf_jit_comp_32.c b/arch/sparc/net/bpf_jit_comp_32.c
index c8eabb973b868..b1dbf2fa8c0ae 100644
--- a/arch/sparc/net/bpf_jit_comp_32.c
+++ b/arch/sparc/net/bpf_jit_comp_32.c
@@ -491,7 +491,7 @@ void bpf_jit_compile(struct bpf_prog *fp)
 				} else {
 					emit_loadimm(K, r_A);
 				}
-				/* Fallthrough */
+				fallthrough;
 			case BPF_RET | BPF_A:
 				if (seen_or_pass0) {
 					if (i != flen - 1) {
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index 3d57c71c532e4..88cd9b5c1b744 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -70,7 +70,7 @@ static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				PT_REGS_SYSCALL_RET(regs) = -EINTR;
 				break;
 			}
-		/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			PT_REGS_RESTART_SYSCALL(regs);
 			PT_REGS_ORIG_SYSCALL(regs) = PT_REGS_SYSCALL_NR(regs);
diff --git a/arch/x86/boot/cmdline.c b/arch/x86/boot/cmdline.c
index 4ff01176c1cc1..21d56ae83cdf1 100644
--- a/arch/x86/boot/cmdline.c
+++ b/arch/x86/boot/cmdline.c
@@ -54,7 +54,7 @@ int __cmdline_find_option(unsigned long cmdline_ptr, const char *option, char *b
 			/* else */
 			state = st_wordcmp;
 			opptr = option;
-			/* fall through */
+			fallthrough;
 
 		case st_wordcmp:
 			if (c == '=' && !*opptr) {
@@ -129,7 +129,7 @@ int __cmdline_find_option_bool(unsigned long cmdline_ptr, const char *option)
 			state = st_wordcmp;
 			opptr = option;
 			wstart = pos;
-			/* fall through */
+			fallthrough;
 
 		case st_wordcmp:
 			if (!*opptr)
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index 0048269180d58..dde7cb3724df3 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -178,7 +178,7 @@ parse_memmap(char *p, unsigned long long *start, unsigned long long *size,
 			}
 			*size = 0;
 		}
-		/* Fall through */
+		fallthrough;
 	default:
 		/*
 		 * If w/o offset, only size specified, memmap=nn[KMG] has the
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 50963472ee850..31e6887d24f1a 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4682,7 +4682,7 @@ __init int intel_pmu_init(void)
 
 	case INTEL_FAM6_CORE2_MEROM:
 		x86_add_quirk(intel_clovertown_quirk);
-		/* fall through */
+		fallthrough;
 
 	case INTEL_FAM6_CORE2_MEROM_L:
 	case INTEL_FAM6_CORE2_PENRYN:
@@ -5062,7 +5062,7 @@ __init int intel_pmu_init(void)
 
 	case INTEL_FAM6_SKYLAKE_X:
 		pmem = true;
-		/* fall through */
+		fallthrough;
 	case INTEL_FAM6_SKYLAKE_L:
 	case INTEL_FAM6_SKYLAKE:
 	case INTEL_FAM6_KABYLAKE_L:
@@ -5114,7 +5114,7 @@ __init int intel_pmu_init(void)
 	case INTEL_FAM6_ICELAKE_X:
 	case INTEL_FAM6_ICELAKE_D:
 		pmem = true;
-		/* fall through */
+		fallthrough;
 	case INTEL_FAM6_ICELAKE_L:
 	case INTEL_FAM6_ICELAKE:
 	case INTEL_FAM6_TIGERLAKE_L:
diff --git a/arch/x86/events/intel/lbr.c b/arch/x86/events/intel/lbr.c
index 63f58bdf556c4..8961653c5dd2b 100644
--- a/arch/x86/events/intel/lbr.c
+++ b/arch/x86/events/intel/lbr.c
@@ -1268,7 +1268,7 @@ static int branch_type(unsigned long from, unsigned long to, int abort)
 			ret = X86_BR_ZERO_CALL;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case 0x9a: /* call far absolute */
 		ret = X86_BR_CALL;
 		break;
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index c3daf0aaa0ee6..cdaab30880b91 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -239,7 +239,7 @@ void __init arch_init_ideal_nops(void)
 			return;
 		}
 
-		/* fall through */
+		fallthrough;
 
 	default:
 #ifdef CONFIG_X86_64
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 21325a4a78b92..779a89e31c4cb 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -800,7 +800,7 @@ static int irq_polarity(int idx)
 		return IOAPIC_POL_HIGH;
 	case MP_IRQPOL_RESERVED:
 		pr_warn("IOAPIC: Invalid polarity: 2, defaulting to low\n");
-		/* fall through */
+		fallthrough;
 	case MP_IRQPOL_ACTIVE_LOW:
 	default: /* Pointless default required due to do gcc stupidity */
 		return IOAPIC_POL_LOW;
@@ -848,7 +848,7 @@ static int irq_trigger(int idx)
 		return IOAPIC_EDGE;
 	case MP_IRQTRIG_RESERVED:
 		pr_warn("IOAPIC: Invalid trigger mode 2 defaulting to level\n");
-		/* fall through */
+		fallthrough;
 	case MP_IRQTRIG_LEVEL:
 	default: /* Pointless default required due to do gcc stupidity */
 		return IOAPIC_LEVEL;
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index 7bda71def557b..99ee61c9ba548 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -149,7 +149,7 @@ void __init default_setup_apic_routing(void)
 				break;
 			}
 			/* P4 and above */
-			/* fall through */
+			fallthrough;
 		case X86_VENDOR_HYGON:
 		case X86_VENDOR_AMD:
 			def_to_bigsmp = 1;
diff --git a/arch/x86/kernel/cpu/cacheinfo.c b/arch/x86/kernel/cpu/cacheinfo.c
index c7503be92f359..57074cf3ad7c1 100644
--- a/arch/x86/kernel/cpu/cacheinfo.c
+++ b/arch/x86/kernel/cpu/cacheinfo.c
@@ -248,7 +248,7 @@ amd_cpuid4(int leaf, union _cpuid4_leaf_eax *eax,
 	switch (leaf) {
 	case 1:
 		l1 = &l1i;
-		/* fall through */
+		fallthrough;
 	case 0:
 		if (!l1->val)
 			return;
diff --git a/arch/x86/kernel/cpu/mce/inject.c b/arch/x86/kernel/cpu/mce/inject.c
index 7843ab3fde099..3a44346f22766 100644
--- a/arch/x86/kernel/cpu/mce/inject.c
+++ b/arch/x86/kernel/cpu/mce/inject.c
@@ -199,7 +199,7 @@ static int raise_local(void)
 			 * calling irq_enter, but the necessary
 			 * machinery isn't exported currently.
 			 */
-			/*FALL THROUGH*/
+			fallthrough;
 		case MCJ_CTX_PROCESS:
 			raise_exception(m, NULL);
 			break;
diff --git a/arch/x86/kernel/cpu/mce/intel.c b/arch/x86/kernel/cpu/mce/intel.c
index d8f9230d20341..abe9fe0fb8517 100644
--- a/arch/x86/kernel/cpu/mce/intel.c
+++ b/arch/x86/kernel/cpu/mce/intel.c
@@ -193,7 +193,7 @@ unsigned long cmci_intel_adjust_timer(unsigned long interval)
 		if (!atomic_sub_return(1, &cmci_storm_on_cpus))
 			pr_notice("CMCI storm subsided: switching to interrupt mode\n");
 
-		/* FALLTHROUGH */
+		fallthrough;
 
 	case CMCI_STORM_SUBSIDED:
 		/*
diff --git a/arch/x86/kernel/cpu/mtrr/cyrix.c b/arch/x86/kernel/cpu/mtrr/cyrix.c
index 72182809b3339..ca670919b5618 100644
--- a/arch/x86/kernel/cpu/mtrr/cyrix.c
+++ b/arch/x86/kernel/cpu/mtrr/cyrix.c
@@ -98,7 +98,7 @@ cyrix_get_free_region(unsigned long base, unsigned long size, int replace_reg)
 	case 7:
 		if (size < 0x40)
 			break;
-		/* Else, fall through */
+		fallthrough;
 	case 6:
 	case 5:
 	case 4:
diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index 8cdf29ffd95f1..b98ff620ba772 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -349,7 +349,7 @@ static int arch_build_bp_info(struct perf_event *bp,
 			hw->len = X86_BREAKPOINT_LEN_X;
 			return 0;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		return -EINVAL;
 	}
diff --git a/arch/x86/kernel/kgdb.c b/arch/x86/kernel/kgdb.c
index 68acd30c6b878..c2f02f308ecfc 100644
--- a/arch/x86/kernel/kgdb.c
+++ b/arch/x86/kernel/kgdb.c
@@ -450,7 +450,7 @@ int kgdb_arch_handle_exception(int e_vector, int signo, int err_code,
 		ptr = &remcomInBuffer[1];
 		if (kgdb_hex2long(&ptr, &addr))
 			linux_regs->ip = addr;
-		/* fall through */
+		fallthrough;
 	case 'D':
 	case 'k':
 		/* clear the trace bit */
@@ -539,7 +539,7 @@ static int __kgdb_notify(struct die_args *args, unsigned long cmd)
 			 * a system call which should be ignored
 			 */
 			return NOTIFY_DONE;
-		/* fall through */
+		fallthrough;
 	default:
 		if (user_mode(regs))
 			return NOTIFY_DONE;
diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index 411af4aa7b51f..baa21090c9be3 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -312,7 +312,7 @@ static void __init construct_default_ioirq_mptable(int mpc_default_type)
 		case 2:
 			if (i == 0 || i == 13)
 				continue;	/* IRQ0 & IRQ13 not connected */
-			/* fall through */
+			fallthrough;
 		default:
 			if (i == 2)
 				continue;	/* IRQ2 is never connected */
@@ -356,7 +356,7 @@ static void __init construct_ioapic_table(int mpc_default_type)
 	default:
 		pr_err("???\nUnknown standard configuration %d\n",
 		       mpc_default_type);
-		/* fall through */
+		fallthrough;
 	case 1:
 	case 5:
 		memcpy(bus.bustype, "ISA   ", 6);
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 5679aa3fdcb87..e7537c5440bba 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -204,7 +204,7 @@ static int set_segment_reg(struct task_struct *task,
 	case offsetof(struct user_regs_struct, ss):
 		if (unlikely(value == 0))
 			return -EIO;
-		/* Else, fall through */
+		fallthrough;
 
 	default:
 		*pt_regs_access(task_pt_regs(task), offset) = value;
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 0ec7ced727fe8..a515e2d230b75 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -654,7 +654,7 @@ static void native_machine_emergency_restart(void)
 
 		case BOOT_CF9_FORCE:
 			port_cf9_safe = true;
-			/* Fall through */
+			fallthrough;
 
 		case BOOT_CF9_SAFE:
 			if (port_cf9_safe) {
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index d5fa494c2304d..be0d7d4152eca 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -726,7 +726,7 @@ handle_signal(struct ksignal *ksig, struct pt_regs *regs)
 				regs->ax = -EINTR;
 				break;
 			}
-		/* fallthrough */
+			fallthrough;
 		case -ERESTARTNOINTR:
 			regs->ax = regs->orig_ax;
 			regs->ip -= 2;
diff --git a/arch/x86/kernel/uprobes.c b/arch/x86/kernel/uprobes.c
index 15e5aad8ac2c1..3fdaa042823d0 100644
--- a/arch/x86/kernel/uprobes.c
+++ b/arch/x86/kernel/uprobes.c
@@ -735,7 +735,7 @@ static int branch_setup_xol_ops(struct arch_uprobe *auprobe, struct insn *insn)
 		 * OPCODE1() of the "short" jmp which checks the same condition.
 		 */
 		opc1 = OPCODE2(insn) - 0x10;
-		/* fall through */
+		fallthrough;
 	default:
 		if (!is_cond_jmp_opcode(opc1))
 			return -ENOSYS;
@@ -892,7 +892,7 @@ int arch_uprobe_analyze_insn(struct arch_uprobe *auprobe, struct mm_struct *mm,
 			fix_ip_or_call = 0;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		riprel_analyze(auprobe, &insn);
 	}
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index d0e2825ae6174..5299ef5ff18d0 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -3016,7 +3016,7 @@ static void string_registers_quirk(struct x86_emulate_ctxt *ctxt)
 	case 0xa4:	/* movsb */
 	case 0xa5:	/* movsd/w */
 		*reg_rmw(ctxt, VCPU_REGS_RSI) &= (u32)-1;
-		/* fall through */
+		fallthrough;
 	case 0xaa:	/* stosb */
 	case 0xab:	/* stosd/w */
 		*reg_rmw(ctxt, VCPU_REGS_RDI) &= (u32)-1;
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 814d3aee5ceff..1d330564eed8c 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1779,7 +1779,7 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
 		ret = kvm_hvcall_signal_event(vcpu, fast, ingpa);
 		if (ret != HV_STATUS_INVALID_PORT_ID)
 			break;
-		/* fall through - maybe userspace knows this conn_id. */
+		fallthrough;	/* maybe userspace knows this conn_id */
 	case HVCALL_POST_MESSAGE:
 		/* don't bother userspace if it has no way to handle it */
 		if (unlikely(rep || !vcpu_to_synic(vcpu)->active)) {
diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
index c47d2acec5293..4aa1c2e00e2ab 100644
--- a/arch/x86/kvm/irq_comm.c
+++ b/arch/x86/kvm/irq_comm.c
@@ -285,7 +285,7 @@ int kvm_set_routing_entry(struct kvm *kvm,
 		switch (ue->u.irqchip.irqchip) {
 		case KVM_IRQCHIP_PIC_SLAVE:
 			e->irqchip.pin += PIC_NUM_PINS / 2;
-			/* fall through */
+			fallthrough;
 		case KVM_IRQCHIP_PIC_MASTER:
 			if (ue->u.irqchip.pin >= PIC_NUM_PINS / 2)
 				return -EINVAL;
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 5ccbee7165a21..35cca2e0c8026 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1053,7 +1053,7 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
 	switch (delivery_mode) {
 	case APIC_DM_LOWEST:
 		vcpu->arch.apic_arb_prio++;
-		/* fall through */
+		fallthrough;
 	case APIC_DM_FIXED:
 		if (unlikely(trig_mode && !level))
 			break;
@@ -1341,7 +1341,7 @@ static u32 __apic_read(struct kvm_lapic *apic, unsigned int offset)
 		break;
 	case APIC_TASKPRI:
 		report_tpr_access(apic, false);
-		/* fall thru */
+		fallthrough;
 	default:
 		val = kvm_lapic_get_reg(apic, offset);
 		break;
@@ -2027,7 +2027,7 @@ int kvm_lapic_reg_write(struct kvm_lapic *apic, u32 reg, u32 val)
 
 	case APIC_LVT0:
 		apic_manage_nmi_watchdog(apic, val);
-		/* fall through */
+		fallthrough;
 	case APIC_LVTTHMR:
 	case APIC_LVTPC:
 	case APIC_LVT1:
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index a5d0207e71897..43fdb0c12a5dd 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4422,7 +4422,7 @@ __reset_rsvds_bits_mask(struct kvm_vcpu *vcpu,
 			rsvd_bits(maxphyaddr, 51);
 		rsvd_check->rsvd_bits_mask[1][4] =
 			rsvd_check->rsvd_bits_mask[0][4];
-		/* fall through */
+		fallthrough;
 	case PT64_ROOT_4LEVEL:
 		rsvd_check->rsvd_bits_mask[0][3] = exb_bit_rsvd |
 			nonleaf_bit8_rsvd | rsvd_bits(7, 7) |
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 03dd7bac80348..0194336b64a4c 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2668,7 +2668,7 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr)
 	case MSR_IA32_APICBASE:
 		if (kvm_vcpu_apicv_active(vcpu))
 			avic_update_vapic_bar(to_svm(vcpu), data);
-		/* Fall through */
+		fallthrough;
 	default:
 		return kvm_set_msr_common(vcpu, msr);
 	}
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 46ba2e03a8926..819c185adf09b 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4654,7 +4654,7 @@ static bool rmode_exception(struct kvm_vcpu *vcpu, int vec)
 			vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
 		if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
 			return false;
-		/* fall through */
+		fallthrough;
 	case DB_VECTOR:
 		return !(vcpu->guest_debug &
 			(KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP));
@@ -4827,7 +4827,7 @@ static int handle_exception_nmi(struct kvm_vcpu *vcpu)
 		}
 		kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1 | DR6_RTM;
 		kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
-		/* fall through */
+		fallthrough;
 	case BP_VECTOR:
 		/*
 		 * Update instruction length as we may reinject #BP from
@@ -5257,7 +5257,7 @@ static int handle_task_switch(struct kvm_vcpu *vcpu)
 				error_code =
 					vmcs_read32(IDT_VECTORING_ERROR_CODE);
 			}
-			/* fall through */
+			fallthrough;
 		case INTR_TYPE_SOFT_EXCEPTION:
 			kvm_clear_exception_queue(vcpu);
 			break;
@@ -5610,7 +5610,7 @@ static int handle_invpcid(struct kvm_vcpu *vcpu)
 		 * keeping track of global entries in shadow page tables.
 		 */
 
-		/* fall-through */
+		fallthrough;
 	case INVPCID_TYPE_ALL_INCL_GLOBAL:
 		kvm_mmu_unload(vcpu);
 		return kvm_skip_emulated_instruction(vcpu);
@@ -6578,7 +6578,7 @@ static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu,
 		break;
 	case INTR_TYPE_SOFT_EXCEPTION:
 		vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field);
-		/* fall through */
+		fallthrough;
 	case INTR_TYPE_HARD_EXCEPTION:
 		if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
 			u32 err = vmcs_read32(error_code_field);
@@ -6588,7 +6588,7 @@ static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu,
 		break;
 	case INTR_TYPE_SOFT_INTR:
 		vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field);
-		/* fall through */
+		fallthrough;
 	case INTR_TYPE_EXT_INTR:
 		kvm_queue_interrupt(vcpu, vector, type == INTR_TYPE_SOFT_INTR);
 		break;
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 33945283fe07d..d39d6cf1d4737 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1116,14 +1116,12 @@ static int __kvm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long val)
 			vcpu->arch.eff_db[dr] = val;
 		break;
 	case 4:
-		/* fall through */
 	case 6:
 		if (!kvm_dr6_valid(val))
 			return -1; /* #GP */
 		vcpu->arch.dr6 = (val & DR6_VOLATILE) | kvm_dr6_fixed(vcpu);
 		break;
 	case 5:
-		/* fall through */
 	default: /* 7 */
 		if (!kvm_dr7_valid(val))
 			return -1; /* #GP */
@@ -1154,12 +1152,10 @@ int kvm_get_dr(struct kvm_vcpu *vcpu, int dr, unsigned long *val)
 		*val = vcpu->arch.db[array_index_nospec(dr, size)];
 		break;
 	case 4:
-		/* fall through */
 	case 6:
 		*val = vcpu->arch.dr6;
 		break;
 	case 5:
-		/* fall through */
 	default: /* 7 */
 		*val = vcpu->arch.dr7;
 		break;
@@ -3051,7 +3047,8 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 
 	case MSR_K7_PERFCTR0 ... MSR_K7_PERFCTR3:
 	case MSR_P6_PERFCTR0 ... MSR_P6_PERFCTR1:
-		pr = true; /* fall through */
+		pr = true;
+		fallthrough;
 	case MSR_K7_EVNTSEL0 ... MSR_K7_EVNTSEL3:
 	case MSR_P6_EVNTSEL0 ... MSR_P6_EVNTSEL1:
 		if (kvm_pmu_is_valid_msr(vcpu, msr))
@@ -4359,7 +4356,7 @@ static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
 	case KVM_CAP_HYPERV_SYNIC2:
 		if (cap->args[0])
 			return -EINVAL;
-		/* fall through */
+		fallthrough;
 
 	case KVM_CAP_HYPERV_SYNIC:
 		if (!irqchip_in_kernel(vcpu->kvm))
@@ -8672,7 +8669,7 @@ static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
 		vcpu->arch.pv.pv_unhalted = false;
 		vcpu->arch.mp_state =
 			KVM_MP_STATE_RUNNABLE;
-		/* fall through */
+		fallthrough;
 	case KVM_MP_STATE_RUNNABLE:
 		vcpu->arch.apf.halted = false;
 		break;
diff --git a/arch/x86/lib/cmdline.c b/arch/x86/lib/cmdline.c
index 4f1719e22d3cb..b6da093393085 100644
--- a/arch/x86/lib/cmdline.c
+++ b/arch/x86/lib/cmdline.c
@@ -58,7 +58,7 @@ __cmdline_find_option_bool(const char *cmdline, int max_cmdline_size,
 			state = st_wordcmp;
 			opptr = option;
 			wstart = pos;
-			/* fall through */
+			fallthrough;
 
 		case st_wordcmp:
 			if (!*opptr) {
@@ -89,7 +89,7 @@ __cmdline_find_option_bool(const char *cmdline, int max_cmdline_size,
 				break;
 			}
 			state = st_wordskip;
-			/* fall through */
+			fallthrough;
 
 		case st_wordskip:
 			if (!c)
@@ -151,7 +151,7 @@ __cmdline_find_option(const char *cmdline, int max_cmdline_size,
 
 			state = st_wordcmp;
 			opptr = option;
-			/* fall through */
+			fallthrough;
 
 		case st_wordcmp:
 			if ((c == '=') && !*opptr) {
@@ -172,7 +172,7 @@ __cmdline_find_option(const char *cmdline, int max_cmdline_size,
 				break;
 			}
 			state = st_wordskip;
-			/* fall through */
+			fallthrough;
 
 		case st_wordskip:
 			if (myisspace(c))
diff --git a/arch/x86/lib/insn-eval.c b/arch/x86/lib/insn-eval.c
index 31600d851fd8e..5e69603ff63ff 100644
--- a/arch/x86/lib/insn-eval.c
+++ b/arch/x86/lib/insn-eval.c
@@ -179,7 +179,7 @@ static int resolve_default_seg(struct insn *insn, struct pt_regs *regs, int off)
 		if (insn->addr_bytes == 2)
 			return -EINVAL;
 
-		/* fall through */
+		fallthrough;
 
 	case -EDOM:
 	case offsetof(struct pt_regs, bx):
@@ -362,7 +362,6 @@ static short get_segment_selector(struct pt_regs *regs, int seg_reg_idx)
 		case INAT_SEG_REG_GS:
 			return vm86regs->gs;
 		case INAT_SEG_REG_IGNORE:
-			/* fall through */
 		default:
 			return -EINVAL;
 		}
@@ -386,7 +385,6 @@ static short get_segment_selector(struct pt_regs *regs, int seg_reg_idx)
 		 */
 		return get_user_gs(regs);
 	case INAT_SEG_REG_IGNORE:
-		/* fall through */
 	default:
 		return -EINVAL;
 	}
@@ -786,7 +784,7 @@ int insn_get_code_seg_params(struct pt_regs *regs)
 		 */
 		return INSN_CODE_SEG_PARAMS(4, 8);
 	case 3: /* Invalid setting. CS.L=1, CS.D=1 */
-		/* fall through */
+		fallthrough;
 	default:
 		return -EINVAL;
 	}
diff --git a/arch/x86/math-emu/errors.c b/arch/x86/math-emu/errors.c
index 73dc66d887f35..ec071cbb08043 100644
--- a/arch/x86/math-emu/errors.c
+++ b/arch/x86/math-emu/errors.c
@@ -186,7 +186,7 @@ void FPU_printall(void)
 		case TAG_Special:
 			/* Update tagi for the printk below */
 			tagi = FPU_Special(r);
-			/* fall through */
+			fallthrough;
 		case TAG_Valid:
 			printk("st(%d)  %c .%04lx %04lx %04lx %04lx e%+-6d ", i,
 			       getsign(r) ? '-' : '+',
diff --git a/arch/x86/math-emu/fpu_trig.c b/arch/x86/math-emu/fpu_trig.c
index 127ea54122d75..4a9887851ad8a 100644
--- a/arch/x86/math-emu/fpu_trig.c
+++ b/arch/x86/math-emu/fpu_trig.c
@@ -1352,7 +1352,7 @@ static void fyl2xp1(FPU_REG *st0_ptr, u_char st0_tag)
 		case TW_Denormal:
 			if (denormal_operand() < 0)
 				return;
-			/* fall through */
+			fallthrough;
 		case TAG_Zero:
 		case TAG_Valid:
 			setsign(st0_ptr, getsign(st0_ptr) ^ getsign(st1_ptr));
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 84d85dbd1dad6..9e5ccc56f8e07 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -574,7 +574,7 @@ static bool memremap_should_map_decrypted(resource_size_t phys_addr,
 		/* For SEV, these areas are encrypted */
 		if (sev_active())
 			break;
-		/* Fallthrough */
+		fallthrough;
 
 	case E820_TYPE_PRAM:
 		return true;
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index 76cee341507b7..b3b17d6c50f07 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -448,7 +448,7 @@ static void do_signal(struct pt_regs *regs)
 						regs->areg[2] = -EINTR;
 						break;
 					}
-					/* fallthrough */
+					fallthrough;
 				case -ERESTARTNOINTR:
 					regs->areg[2] = regs->syscall;
 					regs->pc -= 3;
diff --git a/block/badblocks.c b/block/badblocks.c
index 2e5f5697db358..d39056630d9c1 100644
--- a/block/badblocks.c
+++ b/block/badblocks.c
@@ -525,7 +525,7 @@ ssize_t badblocks_store(struct badblocks *bb, const char *page, size_t len,
 	case 3:
 		if (newline != '\n')
 			return -EINVAL;
-		/* fall through */
+		fallthrough;
 	case 2:
 		if (length <= 0)
 			return -EINVAL;
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index a4c0bec920cbd..c34b090178a98 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -4980,7 +4980,7 @@ bfq_set_next_ioprio_data(struct bfq_queue *bfqq, struct bfq_io_cq *bic)
 		pr_err("bdi %s: bfq: bad prio class %d\n",
 				bdi_dev_name(bfqq->bfqd->queue->backing_dev_info),
 				ioprio_class);
-		/* fall through */
+		fallthrough;
 	case IOPRIO_CLASS_NONE:
 		/*
 		 * No prio set, inherit CPU scheduling settings.
@@ -5112,7 +5112,7 @@ static struct bfq_queue **bfq_async_queue_prio(struct bfq_data *bfqd,
 		return &bfqg->async_bfqq[0][ioprio];
 	case IOPRIO_CLASS_NONE:
 		ioprio = IOPRIO_NORM;
-		/* fall through */
+		fallthrough;
 	case IOPRIO_CLASS_BE:
 		return &bfqg->async_bfqq[1][ioprio];
 	case IOPRIO_CLASS_IDLE:
diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 0fa615eefd526..fd410086fe1de 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -528,7 +528,7 @@ static inline bool wbt_should_throttle(struct rq_wb *rwb, struct bio *bio)
 		if ((bio->bi_opf & (REQ_SYNC | REQ_IDLE)) ==
 		    (REQ_SYNC | REQ_IDLE))
 			return false;
-		/* fallthrough */
+		fallthrough;
 	case REQ_OP_DISCARD:
 		return true;
 	default:
diff --git a/block/ioprio.c b/block/ioprio.c
index 77bcab11dce57..04ebd37966f18 100644
--- a/block/ioprio.c
+++ b/block/ioprio.c
@@ -71,7 +71,7 @@ int ioprio_check_cap(int ioprio)
 		case IOPRIO_CLASS_RT:
 			if (!capable(CAP_SYS_ADMIN))
 				return -EPERM;
-			/* fall through */
+			fallthrough;
 			/* rt has prio field too */
 		case IOPRIO_CLASS_BE:
 			if (data >= IOPRIO_BE_NR || data < 0)
diff --git a/crypto/drbg.c b/crypto/drbg.c
index e99fe34cfa005..3132967a17497 100644
--- a/crypto/drbg.c
+++ b/crypto/drbg.c
@@ -1521,7 +1521,7 @@ static int drbg_prepare_hrng(struct drbg_state *drbg)
 
 	case -EALREADY:
 		err = 0;
-		/* fall through */
+		fallthrough;
 
 	default:
 		drbg->random_ready.func = NULL;
diff --git a/crypto/tcrypt.c b/crypto/tcrypt.c
index ba0b7702f2e91..12e82a61b8961 100644
--- a/crypto/tcrypt.c
+++ b/crypto/tcrypt.c
@@ -2348,121 +2348,121 @@ static int do_test(const char *alg, u32 type, u32 mask, int m, u32 num_mb)
 			test_hash_speed(alg, sec, generic_hash_speed_template);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case 301:
 		test_hash_speed("md4", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 302:
 		test_hash_speed("md5", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 303:
 		test_hash_speed("sha1", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 304:
 		test_hash_speed("sha256", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 305:
 		test_hash_speed("sha384", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 306:
 		test_hash_speed("sha512", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 307:
 		test_hash_speed("wp256", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 308:
 		test_hash_speed("wp384", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 309:
 		test_hash_speed("wp512", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 310:
 		test_hash_speed("tgr128", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 311:
 		test_hash_speed("tgr160", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 312:
 		test_hash_speed("tgr192", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 313:
 		test_hash_speed("sha224", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 314:
 		test_hash_speed("rmd128", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 315:
 		test_hash_speed("rmd160", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 316:
 		test_hash_speed("rmd256", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 317:
 		test_hash_speed("rmd320", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 318:
 		test_hash_speed("ghash-generic", sec, hash_speed_template_16);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 319:
 		test_hash_speed("crc32c", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 320:
 		test_hash_speed("crct10dif", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 321:
 		test_hash_speed("poly1305", sec, poly1305_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 322:
 		test_hash_speed("sha3-224", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 323:
 		test_hash_speed("sha3-256", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 324:
 		test_hash_speed("sha3-384", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 325:
 		test_hash_speed("sha3-512", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 326:
 		test_hash_speed("sm3", sec, generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 327:
 		test_hash_speed("streebog256", sec,
 				generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 328:
 		test_hash_speed("streebog512", sec,
 				generic_hash_speed_template);
 		if (mode > 300 && mode < 400) break;
-		/* fall through */
+		fallthrough;
 	case 399:
 		break;
 
@@ -2471,121 +2471,121 @@ static int do_test(const char *alg, u32 type, u32 mask, int m, u32 num_mb)
 			test_ahash_speed(alg, sec, generic_hash_speed_template);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case 401:
 		test_ahash_speed("md4", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 402:
 		test_ahash_speed("md5", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 403:
 		test_ahash_speed("sha1", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 404:
 		test_ahash_speed("sha256", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 405:
 		test_ahash_speed("sha384", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 406:
 		test_ahash_speed("sha512", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 407:
 		test_ahash_speed("wp256", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 408:
 		test_ahash_speed("wp384", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 409:
 		test_ahash_speed("wp512", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 410:
 		test_ahash_speed("tgr128", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 411:
 		test_ahash_speed("tgr160", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 412:
 		test_ahash_speed("tgr192", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 413:
 		test_ahash_speed("sha224", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 414:
 		test_ahash_speed("rmd128", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 415:
 		test_ahash_speed("rmd160", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 416:
 		test_ahash_speed("rmd256", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 417:
 		test_ahash_speed("rmd320", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 418:
 		test_ahash_speed("sha3-224", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 419:
 		test_ahash_speed("sha3-256", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 420:
 		test_ahash_speed("sha3-384", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 421:
 		test_ahash_speed("sha3-512", sec, generic_hash_speed_template);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 422:
 		test_mb_ahash_speed("sha1", sec, generic_hash_speed_template,
 				    num_mb);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 423:
 		test_mb_ahash_speed("sha256", sec, generic_hash_speed_template,
 				    num_mb);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 424:
 		test_mb_ahash_speed("sha512", sec, generic_hash_speed_template,
 				    num_mb);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 425:
 		test_mb_ahash_speed("sm3", sec, generic_hash_speed_template,
 				    num_mb);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 426:
 		test_mb_ahash_speed("streebog256", sec,
 				    generic_hash_speed_template, num_mb);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 427:
 		test_mb_ahash_speed("streebog512", sec,
 				    generic_hash_speed_template, num_mb);
 		if (mode > 400 && mode < 500) break;
-		/* fall through */
+		fallthrough;
 	case 499:
 		break;
 
diff --git a/drivers/accessibility/braille/braille_console.c b/drivers/accessibility/braille/braille_console.c
index c2b452af68068..9861302cc7dbb 100644
--- a/drivers/accessibility/braille/braille_console.c
+++ b/drivers/accessibility/braille/braille_console.c
@@ -290,7 +290,7 @@ static int vt_notifier_call(struct notifier_block *blk,
 			break;
 		case '\t':
 			c = ' ';
-			/* Fallthrough */
+			fallthrough;
 		default:
 			if (c < 32)
 				/* Ignore other control sequences */
diff --git a/drivers/ata/ahci_brcm.c b/drivers/ata/ahci_brcm.c
index 6853dbb4131d8..49f7acbfcf01e 100644
--- a/drivers/ata/ahci_brcm.c
+++ b/drivers/ata/ahci_brcm.c
@@ -470,7 +470,7 @@ static int brcm_ahci_probe(struct platform_device *pdev)
 	switch (priv->version) {
 	case BRCM_SATA_BCM7425:
 		hpriv->flags |= AHCI_HFLAG_DELAY_ENGINE;
-		/* fall through */
+		fallthrough;
 	case BRCM_SATA_NSP:
 		hpriv->flags |= AHCI_HFLAG_NO_NCQ;
 		priv->quirks |= BRCM_AHCI_QUIRK_SKIP_PHY_ENABLE;
diff --git a/drivers/ata/libahci_platform.c b/drivers/ata/libahci_platform.c
index 129556fcf6be7..86261deeb4c58 100644
--- a/drivers/ata/libahci_platform.c
+++ b/drivers/ata/libahci_platform.c
@@ -326,7 +326,7 @@ static int ahci_platform_get_phy(struct ahci_host_priv *hpriv, u32 port,
 				node);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case -ENODEV:
 		/* continue normally */
 		hpriv->phys[port] = NULL;
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b1cd4d97bc2a7..1a82058defdb6 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -190,7 +190,7 @@ struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
 		case ATA_LITER_PMP_FIRST:
 			if (sata_pmp_attached(ap))
 				return ap->pmp_link;
-			/* fall through */
+			fallthrough;
 		case ATA_LITER_HOST_FIRST:
 			return &ap->link;
 		}
@@ -201,11 +201,11 @@ struct ata_link *ata_link_next(struct ata_link *link, struct ata_port *ap,
 		case ATA_LITER_HOST_FIRST:
 			if (sata_pmp_attached(ap))
 				return ap->pmp_link;
-			/* fall through */
+			fallthrough;
 		case ATA_LITER_PMP_FIRST:
 			if (unlikely(ap->slave_link))
 				return ap->slave_link;
-			/* fall through */
+			fallthrough;
 		case ATA_LITER_EDGE:
 			return NULL;
 		}
@@ -523,7 +523,7 @@ int atapi_cmd_type(u8 opcode)
 	case ATA_12:
 		if (atapi_passthru16)
 			return ATAPI_PASS_THRU;
-		/* fall thru */
+		fallthrough;
 	default:
 		return ATAPI_MISC;
 	}
@@ -1800,7 +1800,7 @@ int ata_dev_read_id(struct ata_device *dev, unsigned int *p_class,
 	switch (class) {
 	case ATA_DEV_SEMB:
 		class = ATA_DEV_ATA;	/* some hard drives report SEMB sig */
-		/* fall through */
+		fallthrough;
 	case ATA_DEV_ATA:
 	case ATA_DEV_ZAC:
 		tf.command = ATA_CMD_ID_ATA;
@@ -2907,7 +2907,7 @@ int ata_bus_probe(struct ata_port *ap)
 	case -ENODEV:
 		/* give it just one more chance */
 		tries[dev->devno] = min(tries[dev->devno], 1);
-		/* fall through */
+		fallthrough;
 	case -EIO:
 		if (tries[dev->devno] == 1) {
 			/* This is the last chance, better to slow
@@ -3158,7 +3158,7 @@ int ata_down_xfermask_limit(struct ata_device *dev, unsigned int sel)
 
 	case ATA_DNXFER_FORCE_PIO0:
 		pio_mask &= 1;
-		/* fall through */
+		fallthrough;
 	case ATA_DNXFER_FORCE_PIO:
 		mwdma_mask = 0;
 		udma_mask = 0;
@@ -4694,7 +4694,7 @@ void ata_qc_complete(struct ata_queued_cmd *qc)
 			    qc->tf.feature != SETFEATURES_RA_ON &&
 			    qc->tf.feature != SETFEATURES_RA_OFF)
 				break;
-			/* fall through */
+			fallthrough;
 		case ATA_CMD_INIT_DEV_PARAMS: /* CHS translation changed */
 		case ATA_CMD_SET_MULTI: /* multi_count changed */
 			/* revalidate device */
diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 474c6c34fe022..d912eaa65c943 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -1576,7 +1576,7 @@ static unsigned int ata_eh_analyze_tf(struct ata_queued_cmd *qc,
 	case ATA_DEV_ZAC:
 		if (stat & ATA_SENSE)
 			ata_eh_request_sense(qc, qc->scsicmd);
-		/* fall through */
+		fallthrough;
 	case ATA_DEV_ATA:
 		if (err & ATA_ICRC)
 			qc->err_mask |= AC_ERR_ATA_BUS;
@@ -3473,11 +3473,11 @@ static int ata_eh_handle_dev_fail(struct ata_device *dev, int err)
 	case -ENODEV:
 		/* device missing or wrong IDENTIFY data, schedule probing */
 		ehc->i.probe_mask |= (1 << dev->devno);
-		/* fall through */
+		fallthrough;
 	case -EINVAL:
 		/* give it just one more chance */
 		ehc->tries[dev->devno] = min(ehc->tries[dev->devno], 1);
-		/* fall through */
+		fallthrough;
 	case -EIO:
 		if (ehc->tries[dev->devno] == 1) {
 			/* This is the last chance, better to slow
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index ec233208585bd..4ce4cd32508ce 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -4162,7 +4162,7 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
 				ata_scsi_rbuf_fill(&args, ata_scsiop_inq_b6);
 				break;
 			}
-			/* Fallthrough */
+			fallthrough;
 		default:
 			ata_scsi_set_invalid_field(dev, cmd, 2, 0xff);
 			break;
@@ -4198,7 +4198,7 @@ void ata_scsi_simulate(struct ata_device *dev, struct scsi_cmnd *cmd)
 	 * turning this into a no-op.
 	 */
 	case SYNCHRONIZE_CACHE:
-		/* fall through */
+		fallthrough;
 
 	/* no-op's, complete with success */
 	case REZERO_UNIT:
diff --git a/drivers/ata/pata_atp867x.c b/drivers/ata/pata_atp867x.c
index e01a3a6e4d462..2bc5fc81efe30 100644
--- a/drivers/ata/pata_atp867x.c
+++ b/drivers/ata/pata_atp867x.c
@@ -157,7 +157,7 @@ static int atp867x_get_active_clocks_shifted(struct ata_port *ap,
 	default:
 		printk(KERN_WARNING "ATP867X: active %dclk is invalid. "
 			"Using 12clk.\n", clk);
-		/* fall through */
+		fallthrough;
 	case 9 ... 12:
 		clocks = 7;	/* 12 clk */
 		break;
@@ -190,7 +190,7 @@ static int atp867x_get_recover_clocks_shifted(unsigned int clk)
 	default:
 		printk(KERN_WARNING "ATP867X: recover %dclk is invalid. "
 			"Using default 12clk.\n", clk);
-		/* fall through */
+		fallthrough;
 	case 12:	/* default 12 clk */
 		clocks = 0;
 		break;
diff --git a/drivers/ata/pata_serverworks.c b/drivers/ata/pata_serverworks.c
index 916bf024d7375..7511e11eef4d6 100644
--- a/drivers/ata/pata_serverworks.c
+++ b/drivers/ata/pata_serverworks.c
@@ -369,7 +369,7 @@ static int serverworks_fixup(struct pci_dev *pdev)
 		break;
 	case PCI_DEVICE_ID_SERVERWORKS_CSB5IDE:
 		ata_pci_bmdma_clear_simplex(pdev);
-		/* fall through */
+		fallthrough;
 	case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE:
 	case PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2:
 		rc = serverworks_fixup_csb(pdev);
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index d7228f8e9297c..664ef658a955f 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -2010,7 +2010,7 @@ static void mv_rw_multi_errata_sata24(struct ata_queued_cmd *qc)
 				break;
 			case ATA_CMD_WRITE_MULTI_FUA_EXT:
 				tf->flags &= ~ATA_TFLAG_FUA; /* ugh */
-				/* fall through */
+				fallthrough;
 			case ATA_CMD_WRITE_MULTI_EXT:
 				tf->command = ATA_CMD_PIO_WRITE_EXT;
 				break;
@@ -2044,7 +2044,7 @@ static enum ata_completion_errors mv_qc_prep(struct ata_queued_cmd *qc)
 	case ATA_PROT_DMA:
 		if (tf->command == ATA_CMD_DSM)
 			return AC_ERR_OK;
-		/* fall-thru */
+		fallthrough;
 	case ATA_PROT_NCQ:
 		break;	/* continue below */
 	case ATA_PROT_PIO:
@@ -2296,7 +2296,7 @@ static unsigned int mv_qc_issue_fis(struct ata_queued_cmd *qc)
 	switch (qc->tf.protocol) {
 	case ATAPI_PROT_PIO:
 		pp->pp_flags |= MV_PP_FLAG_FAKE_ATA_BUSY;
-		/* fall through */
+		fallthrough;
 	case ATAPI_PROT_NODATA:
 		ap->hsm_task_state = HSM_ST_FIRST;
 		break;
@@ -2347,7 +2347,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
 				return AC_ERR_OTHER;
 			break;  /* use bmdma for this */
 		}
-		/* fall thru */
+		fallthrough;
 	case ATA_PROT_NCQ:
 		mv_start_edma(ap, port_mmio, pp, qc->tf.protocol);
 		pp->req_idx = (pp->req_idx + 1) & MV_MAX_Q_DEPTH_MASK;
@@ -2376,7 +2376,7 @@ static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
 				      ": attempting PIO w/multiple DRQ: "
 				      "this may fail due to h/w errata\n");
 		}
-		/* fall through */
+		fallthrough;
 	case ATA_PROT_NODATA:
 	case ATAPI_PROT_PIO:
 	case ATAPI_PROT_NODATA:
@@ -3864,7 +3864,7 @@ static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
 				" and avoid the final two gigabytes on"
 				" all RocketRAID BIOS initialized drives.\n");
 		}
-		/* fall through */
+		fallthrough;
 	case chip_6042:
 		hpriv->ops = &mv6xxx_ops;
 		hp_flags |= MV_HP_GEN_IIE;
diff --git a/drivers/ata/sata_promise.c b/drivers/ata/sata_promise.c
index 8729f78cef5fd..7815da8ef9e58 100644
--- a/drivers/ata/sata_promise.c
+++ b/drivers/ata/sata_promise.c
@@ -637,7 +637,7 @@ static enum ata_completion_errors pdc_qc_prep(struct ata_queued_cmd *qc)
 	switch (qc->tf.protocol) {
 	case ATA_PROT_DMA:
 		pdc_fill_sg(qc);
-		/*FALLTHROUGH*/
+		fallthrough;
 	case ATA_PROT_NODATA:
 		i = pdc_pkt_header(&qc->tf, qc->ap->bmdma_prd_dma,
 				   qc->dev->devno, pp->pkt);
@@ -652,7 +652,7 @@ static enum ata_completion_errors pdc_qc_prep(struct ata_queued_cmd *qc)
 		break;
 	case ATAPI_PROT_DMA:
 		pdc_fill_sg(qc);
-		/*FALLTHROUGH*/
+		fallthrough;
 	case ATAPI_PROT_NODATA:
 		pdc_atapi_pkt(qc);
 		break;
@@ -1022,11 +1022,11 @@ static unsigned int pdc_qc_issue(struct ata_queued_cmd *qc)
 	case ATAPI_PROT_NODATA:
 		if (qc->dev->flags & ATA_DFLAG_CDB_INTR)
 			break;
-		/*FALLTHROUGH*/
+		fallthrough;
 	case ATA_PROT_NODATA:
 		if (qc->tf.flags & ATA_TFLAG_POLLING)
 			break;
-		/*FALLTHROUGH*/
+		fallthrough;
 	case ATAPI_PROT_DMA:
 	case ATA_PROT_DMA:
 		pdc_packet_start(qc);
diff --git a/drivers/ata/sata_sx4.c b/drivers/ata/sata_sx4.c
index 2c7b30c5ea3dd..4c01190a5e370 100644
--- a/drivers/ata/sata_sx4.c
+++ b/drivers/ata/sata_sx4.c
@@ -669,7 +669,7 @@ static unsigned int pdc20621_qc_issue(struct ata_queued_cmd *qc)
 	case ATA_PROT_NODATA:
 		if (qc->tf.flags & ATA_TFLAG_POLLING)
 			break;
-		/*FALLTHROUGH*/
+		fallthrough;
 	case ATA_PROT_DMA:
 		pdc20621_packet_start(qc);
 		return 0;
diff --git a/drivers/atm/firestream.c b/drivers/atm/firestream.c
index 2ca9ec8027342..c798856e74a4b 100644
--- a/drivers/atm/firestream.c
+++ b/drivers/atm/firestream.c
@@ -711,7 +711,7 @@ static void process_txdone_queue (struct fs_dev *dev, struct queue *q)
 
 		switch (STATUS_CODE (qe)) {
 		case 0x01: /* This is for AAL0 where we put the chip in streaming mode */
-			/* Fall through */
+			fallthrough;
 		case 0x02:
 			/* Process a real txdone entry. */
 			tmp = qe->p0;
diff --git a/drivers/atm/fore200e.c b/drivers/atm/fore200e.c
index a81bc49c14acc..9a70bee841251 100644
--- a/drivers/atm/fore200e.c
+++ b/drivers/atm/fore200e.c
@@ -376,33 +376,33 @@ fore200e_shutdown(struct fore200e* fore200e)
     case FORE200E_STATE_COMPLETE:
 	kfree(fore200e->stats);
 
-	/* fall through */
+	fallthrough;
     case FORE200E_STATE_IRQ:
 	free_irq(fore200e->irq, fore200e->atm_dev);
 
-	/* fall through */
+	fallthrough;
     case FORE200E_STATE_ALLOC_BUF:
 	fore200e_free_rx_buf(fore200e);
 
-	/* fall through */
+	fallthrough;
     case FORE200E_STATE_INIT_BSQ:
 	fore200e_uninit_bs_queue(fore200e);
 
-	/* fall through */
+	fallthrough;
     case FORE200E_STATE_INIT_RXQ:
 	fore200e_dma_chunk_free(fore200e, &fore200e->host_rxq.status);
 	fore200e_dma_chunk_free(fore200e, &fore200e->host_rxq.rpd);
 
-	/* fall through */
+	fallthrough;
     case FORE200E_STATE_INIT_TXQ:
 	fore200e_dma_chunk_free(fore200e, &fore200e->host_txq.status);
 	fore200e_dma_chunk_free(fore200e, &fore200e->host_txq.tpd);
 
-	/* fall through */
+	fallthrough;
     case FORE200E_STATE_INIT_CMDQ:
 	fore200e_dma_chunk_free(fore200e, &fore200e->host_cmdq.status);
 
-	/* fall through */
+	fallthrough;
     case FORE200E_STATE_INITIALIZE:
 	/* nothing to do for that state */
 
@@ -415,7 +415,7 @@ fore200e_shutdown(struct fore200e* fore200e)
     case FORE200E_STATE_MAP:
 	fore200e->bus->unmap(fore200e);
 
-	/* fall through */
+	fallthrough;
     case FORE200E_STATE_CONFIGURE:
 	/* nothing to do for that state */
 
diff --git a/drivers/atm/he.c b/drivers/atm/he.c
index 8af793f5e8113..17f44abc9418e 100644
--- a/drivers/atm/he.c
+++ b/drivers/atm/he.c
@@ -1944,14 +1944,14 @@ he_tasklet(unsigned long data)
 		switch (type) {
 			case ITYPE_RBRQ_THRESH:
 				HPRINTK("rbrq%d threshold\n", group);
-				/* fall through */
+				fallthrough;
 			case ITYPE_RBRQ_TIMER:
 				if (he_service_rbrq(he_dev, group))
 					he_service_rbpl(he_dev, group);
 				break;
 			case ITYPE_TBRQ_THRESH:
 				HPRINTK("tbrq%d threshold\n", group);
-				/* fall through */
+				fallthrough;
 			case ITYPE_TPD_COMPLETE:
 				he_service_tbrq(he_dev, group);
 				break;
diff --git a/drivers/atm/idt77105.c b/drivers/atm/idt77105.c
index 63871859e6e8e..3c081b6171a8f 100644
--- a/drivers/atm/idt77105.c
+++ b/drivers/atm/idt77105.c
@@ -192,7 +192,7 @@ static int idt77105_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
 	switch (cmd) {
 		case IDT77105_GETSTATZ:
 			if (!capable(CAP_NET_ADMIN)) return -EPERM;
-			/* fall through */
+			fallthrough;
 		case IDT77105_GETSTAT:
 			return fetch_stats(dev, arg, cmd == IDT77105_GETSTATZ);
 		case ATM_SETLOOP:
diff --git a/drivers/atm/lanai.c b/drivers/atm/lanai.c
index 986c1313694c6..ac811cfa68431 100644
--- a/drivers/atm/lanai.c
+++ b/drivers/atm/lanai.c
@@ -2019,7 +2019,7 @@ static int lanai_normalize_ci(struct lanai_dev *lanai,
 	switch (*vpip) {
 		case ATM_VPI_ANY:
 			*vpip = 0;
-			/* FALLTHROUGH */
+			fallthrough;
 		case 0:
 			break;
 		default:
diff --git a/drivers/atm/zatm.c b/drivers/atm/zatm.c
index ee059c77e3bbc..cf5fffcf98a1e 100644
--- a/drivers/atm/zatm.c
+++ b/drivers/atm/zatm.c
@@ -1447,7 +1447,7 @@ static int zatm_ioctl(struct atm_dev *dev,unsigned int cmd,void __user *arg)
 	switch (cmd) {
 		case ZATM_GETPOOLZ:
 			if (!capable(CAP_NET_ADMIN)) return -EPERM;
-			/* fall through */
+			fallthrough;
 		case ZATM_GETPOOL:
 			{
 				struct zatm_pool_info info;
diff --git a/drivers/auxdisplay/panel.c b/drivers/auxdisplay/panel.c
index 99980aa3644bc..1c82d824ae007 100644
--- a/drivers/auxdisplay/panel.c
+++ b/drivers/auxdisplay/panel.c
@@ -1365,7 +1365,7 @@ static void panel_process_inputs(void)
 				break;
 			input->rise_timer = 0;
 			input->state = INPUT_ST_RISING;
-			/* fall through */
+			fallthrough;
 		case INPUT_ST_RISING:
 			if ((phys_curr & input->mask) != input->value) {
 				input->state = INPUT_ST_LOW;
@@ -1378,11 +1378,11 @@ static void panel_process_inputs(void)
 			}
 			input->high_timer = 0;
 			input->state = INPUT_ST_HIGH;
-			/* fall through */
+			fallthrough;
 		case INPUT_ST_HIGH:
 			if (input_state_high(input))
 				break;
-			/* fall through */
+			fallthrough;
 		case INPUT_ST_FALLING:
 			input_state_falling(input);
 		}
diff --git a/drivers/base/firmware_loader/fallback.c b/drivers/base/firmware_loader/fallback.c
index 5327bfc6ba719..283ca2de76d45 100644
--- a/drivers/base/firmware_loader/fallback.c
+++ b/drivers/base/firmware_loader/fallback.c
@@ -289,10 +289,10 @@ static ssize_t firmware_loading_store(struct device *dev,
 			}
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	default:
 		dev_err(dev, "%s: unexpected value (%d)\n", __func__, loading);
-		/* fallthrough */
+		fallthrough;
 	case -1:
 		fw_load_abort(fw_sysfs);
 		break;
diff --git a/drivers/block/aoe/aoecmd.c b/drivers/block/aoe/aoecmd.c
index 3cf9bc5d8d959..6dba413951551 100644
--- a/drivers/block/aoe/aoecmd.c
+++ b/drivers/block/aoe/aoecmd.c
@@ -1135,7 +1135,7 @@ noskb:		if (buf)
 			break;
 		}
 		bvcpy(skb, f->buf->bio, f->iter, n);
-		/* fall through */
+		fallthrough;
 	case ATA_CMD_PIO_WRITE:
 	case ATA_CMD_PIO_WRITE_EXT:
 		spin_lock_irq(&d->lock);
diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c
index 1553d41f0b916..a50e13af03052 100644
--- a/drivers/block/ataflop.c
+++ b/drivers/block/ataflop.c
@@ -1726,7 +1726,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode,
 		/* MSch: invalidate default_params */
 		default_params[drive].blocks  = 0;
 		set_capacity(floppy->disk, MAX_DISK_SIZE * 2);
-		/* Fall through */
+		fallthrough;
 	case FDFMTEND:
 	case FDFLUSH:
 		/* invalidate the buffer track to force a reread */
diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index fe6cb99eb9176..740e93bad21fe 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1733,7 +1733,7 @@ static inline void __drbd_chk_io_error_(struct drbd_device *device,
 				_drbd_set_state(_NS(device, disk, D_INCONSISTENT), CS_HARD, NULL);
 			break;
 		}
-		/* fall through - for DRBD_META_IO_ERROR or DRBD_FORCE_DETACH */
+		fallthrough;	/* for DRBD_META_IO_ERROR or DRBD_FORCE_DETACH */
 	case EP_DETACH:
 	case EP_CALL_HELPER:
 		/* Remember whether we saw a READ or WRITE error.
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index cb687ccdbd96f..04b6bde9419d2 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -430,7 +430,7 @@ int drbd_thread_start(struct drbd_thread *thi)
 		thi->t_state = RESTARTING;
 		drbd_info(resource, "Restarting %s thread (from %s [%d])\n",
 				thi->name, current->comm, current->pid);
-		/* fall through */
+		fallthrough;
 	case RUNNING:
 	case RESTARTING:
 	default:
diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 28eb078f8b754..43c8ae4d9fca8 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -3883,7 +3883,7 @@ static int nla_put_status_info(struct sk_buff *skb, struct drbd_device *device,
 			if (nla_put_u32(skb, T_helper_exit_code,
 					sib->helper_exit_code))
 				goto nla_put_failure;
-			/* fall through */
+			fallthrough;
 		case SIB_HELPER_PRE:
 			if (nla_put_string(skb, T_helper, sib->helper_name))
 				goto nla_put_failure;
diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index 1d17593f5d2bb..422363daa6180 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -1797,7 +1797,7 @@ static int receive_Barrier(struct drbd_connection *connection, struct packet_inf
 			break;
 		else
 			drbd_warn(connection, "Allocation of an epoch failed, slowing down\n");
-			/* Fall through */
+		fallthrough;
 
 	case WO_BDEV_FLUSH:
 	case WO_DRAIN_IO:
@@ -2917,7 +2917,7 @@ static int receive_DataRequest(struct drbd_connection *connection, struct packet
 		   then we would do something smarter here than reading
 		   the block... */
 		peer_req->flags |= EE_RS_THIN_REQ;
-		/* fall through */
+		fallthrough;
 	case P_RS_DATA_REQUEST:
 		peer_req->w.cb = w_e_end_rsdata_req;
 		fault_type = DRBD_FAULT_RS_RD;
@@ -3083,7 +3083,7 @@ static int drbd_asb_recover_0p(struct drbd_peer_device *peer_device) __must_hold
 			rv =  1;
 			break;
 		}
-		/* Else fall through - to one of the other strategies... */
+		fallthrough;	/* to one of the other strategies */
 	case ASB_DISCARD_OLDER_PRI:
 		if (self == 0 && peer == 1) {
 			rv = 1;
@@ -3096,7 +3096,7 @@ static int drbd_asb_recover_0p(struct drbd_peer_device *peer_device) __must_hold
 		/* Else fall through to one of the other strategies... */
 		drbd_warn(device, "Discard younger/older primary did not find a decision\n"
 		     "Using discard-least-changes instead\n");
-		/* fall through */
+		fallthrough;
 	case ASB_DISCARD_ZERO_CHG:
 		if (ch_peer == 0 && ch_self == 0) {
 			rv = test_bit(RESOLVE_CONFLICTS, &peer_device->connection->flags)
@@ -3108,7 +3108,7 @@ static int drbd_asb_recover_0p(struct drbd_peer_device *peer_device) __must_hold
 		}
 		if (after_sb_0p == ASB_DISCARD_ZERO_CHG)
 			break;
-		/* else, fall through */
+		fallthrough;
 	case ASB_DISCARD_LEAST_CHG:
 		if	(ch_self < ch_peer)
 			rv = -1;
@@ -3608,7 +3608,7 @@ static enum drbd_conns drbd_sync_handshake(struct drbd_peer_device *peer_device,
 		switch (rr_conflict) {
 		case ASB_CALL_HELPER:
 			drbd_khelper(device, "pri-lost");
-			/* fall through */
+			fallthrough;
 		case ASB_DISCONNECT:
 			drbd_err(device, "I shall become SyncTarget, but I am primary!\n");
 			return C_MASK;
diff --git a/drivers/block/drbd/drbd_req.c b/drivers/block/drbd/drbd_req.c
index 674be09b2da94..5c975af9c15fb 100644
--- a/drivers/block/drbd/drbd_req.c
+++ b/drivers/block/drbd/drbd_req.c
@@ -611,7 +611,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
 		drbd_set_out_of_sync(device, req->i.sector, req->i.size);
 		drbd_report_io_error(device, req);
 		__drbd_chk_io_error(device, DRBD_READ_ERROR);
-		/* fall through. */
+		fallthrough;
 	case READ_AHEAD_COMPLETED_WITH_ERROR:
 		/* it is legal to fail read-ahead, no __drbd_chk_io_error in that case. */
 		mod_rq_state(req, m, RQ_LOCAL_PENDING, RQ_LOCAL_COMPLETED);
@@ -836,7 +836,7 @@ int __req_mod(struct drbd_request *req, enum drbd_req_event what,
 			} /* else: FIXME can this happen? */
 			break;
 		}
-		/* else, fall through - to BARRIER_ACKED */
+		fallthrough;	/* to BARRIER_ACKED */
 
 	case BARRIER_ACKED:
 		/* barrier ack for READ requests does not make sense */
diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c
index 09079aee8dc43..a563b023458a8 100644
--- a/drivers/block/floppy.c
+++ b/drivers/block/floppy.c
@@ -1680,7 +1680,7 @@ static void recal_interrupt(void)
 			clear_bit(FD_DISK_NEWCHANGE_BIT,
 				  &drive_state[current_drive].flags);
 			drive_state[current_drive].select_date = jiffies;
-			/* fall through */
+			fallthrough;
 		default:
 			debugt(__func__, "default");
 			/* Recalibrate moves the head by at
@@ -3592,7 +3592,7 @@ static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int
 		if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR)
 			return -EINTR;
 		process_fd_request();
-		/* fall through */
+		fallthrough;
 	case FDGETDRVSTAT:
 		outparam = &drive_state[drive];
 		break;
diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 2f137d6ce169d..33cc6558f9d2e 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1719,7 +1719,7 @@ static int lo_ioctl(struct block_device *bdev, fmode_t mode,
 	case LOOP_SET_BLOCK_SIZE:
 		if (!(mode & FMODE_WRITE) && !capable(CAP_SYS_ADMIN))
 			return -EPERM;
-		/* Fall through */
+		fallthrough;
 	default:
 		err = lo_simple_ioctl(lo, cmd, arg);
 		break;
@@ -1867,7 +1867,7 @@ static int lo_compat_ioctl(struct block_device *bdev, fmode_t mode,
 	case LOOP_SET_STATUS64:
 	case LOOP_CONFIGURE:
 		arg = (unsigned long) compat_ptr(arg);
-		/* fall through */
+		fallthrough;
 	case LOOP_SET_FD:
 	case LOOP_CHANGE_FD:
 	case LOOP_SET_BLOCK_SIZE:
diff --git a/drivers/block/paride/pd.c b/drivers/block/paride/pd.c
index c0967507d085e..a7af4f27b7c3f 100644
--- a/drivers/block/paride/pd.c
+++ b/drivers/block/paride/pd.c
@@ -440,7 +440,7 @@ static void run_fsm(void)
 				pd_claimed = 1;
 				if (!pi_schedule_claimed(pi_current, run_fsm))
 					return;
-				/* fall through */
+				fallthrough;
 			case 1:
 				pd_claimed = 2;
 				pi_current->proto->connect(pi_current);
@@ -465,7 +465,7 @@ static void run_fsm(void)
 				if (stop)
 					return;
 				}
-				/* fall through */
+				fallthrough;
 			case Hold:
 				schedule_fsm();
 				return;
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index 4becc1efe775f..1034e445680c5 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2641,7 +2641,7 @@ static int pkt_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd,
 		 */
 		if (pd->refcnt == 1)
 			pkt_lock_door(pd, 0);
-		/* fall through */
+		fallthrough;
 	/*
 	 * forward selected CDROM ioctls to CD-ROM, for UDF
 	 */
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index d9c0e7d154f9f..0115390396932 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -3293,7 +3293,7 @@ static bool rbd_obj_advance_copyup(struct rbd_obj_request *obj_req, int *result)
 	case __RBD_OBJ_COPYUP_OBJECT_MAPS:
 		if (!pending_result_dec(&obj_req->pending, result))
 			return false;
-		/* fall through */
+		fallthrough;
 	case RBD_OBJ_COPYUP_OBJECT_MAPS:
 		if (*result) {
 			rbd_warn(rbd_dev, "snap object map update failed: %d",
@@ -3312,7 +3312,7 @@ static bool rbd_obj_advance_copyup(struct rbd_obj_request *obj_req, int *result)
 	case __RBD_OBJ_COPYUP_WRITE_OBJECT:
 		if (!pending_result_dec(&obj_req->pending, result))
 			return false;
-		/* fall through */
+		fallthrough;
 	case RBD_OBJ_COPYUP_WRITE_OBJECT:
 		return true;
 	default:
@@ -3399,7 +3399,7 @@ static bool rbd_obj_advance_write(struct rbd_obj_request *obj_req, int *result)
 	case __RBD_OBJ_WRITE_COPYUP:
 		if (!rbd_obj_advance_copyup(obj_req, result))
 			return false;
-		/* fall through */
+		fallthrough;
 	case RBD_OBJ_WRITE_COPYUP:
 		if (*result) {
 			rbd_warn(rbd_dev, "copyup failed: %d", *result);
@@ -3592,7 +3592,7 @@ static bool rbd_img_advance(struct rbd_img_request *img_req, int *result)
 	case __RBD_IMG_OBJECT_REQUESTS:
 		if (!pending_result_dec(&img_req->pending, result))
 			return false;
-		/* fall through */
+		fallthrough;
 	case RBD_IMG_OBJECT_REQUESTS:
 		return true;
 	default:
diff --git a/drivers/block/rsxx/core.c b/drivers/block/rsxx/core.c
index 7e261224ff106..8799e3bab0677 100644
--- a/drivers/block/rsxx/core.c
+++ b/drivers/block/rsxx/core.c
@@ -425,7 +425,7 @@ static void card_state_change(struct rsxx_cardinfo *card,
 		 * Fall through so the DMA devices can be attached and
 		 * the user can attempt to pull off their data.
 		 */
-		/* fall through */
+		fallthrough;
 	case CARD_STATE_GOOD:
 		st = rsxx_get_card_size8(card, &card->size8);
 		if (st)
diff --git a/drivers/block/skd_main.c b/drivers/block/skd_main.c
index 3a476dc1d14f5..ae6454c24594f 100644
--- a/drivers/block/skd_main.c
+++ b/drivers/block/skd_main.c
@@ -1436,7 +1436,7 @@ static void skd_resolve_req_exception(struct skd_device *skdev,
 			blk_mq_requeue_request(req, true);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 
 	case SKD_CHECK_STATUS_REPORT_ERROR:
 	default:
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index c2f71265af4b5..adfc9352351df 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -1260,7 +1260,7 @@ static int dispatch_rw_block_io(struct xen_blkif_ring *ring,
 		break;
 	case BLKIF_OP_WRITE_BARRIER:
 		drain = true;
-		/* fall through */
+		fallthrough;
 	case BLKIF_OP_FLUSH_DISKCACHE:
 		ring->st_f_req++;
 		operation = REQ_OP_WRITE;
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index 42944d41aea03..b9aa5d1ac10b7 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -843,7 +843,7 @@ static void frontend_changed(struct xenbus_device *dev,
 		xenbus_switch_state(dev, XenbusStateClosed);
 		if (xenbus_dev_is_online(dev))
 			break;
-		/* fall through */
+		fallthrough;
 		/* if not online */
 	case XenbusStateUnknown:
 		/* implies xen_blkif_disconnect() via xen_blkbk_remove() */
diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c
index 3bb3dd8da9b0c..91de2e0755aec 100644
--- a/drivers/block/xen-blkfront.c
+++ b/drivers/block/xen-blkfront.c
@@ -1403,7 +1403,6 @@ static enum blk_req_status blkif_rsp_to_req_status(int rsp)
 	case BLKIF_RSP_EOPNOTSUPP:
 		return REQ_EOPNOTSUPP;
 	case BLKIF_RSP_ERROR:
-		/* Fallthrough. */
 	default:
 		return REQ_ERROR;
 	}
@@ -1643,7 +1642,7 @@ static irqreturn_t blkif_interrupt(int irq, void *dev_id)
 				info->feature_flush = 0;
 				xlvbd_flush(info);
 			}
-			/* fall through */
+			fallthrough;
 		case BLKIF_OP_READ:
 		case BLKIF_OP_WRITE:
 			if (unlikely(bret->status != BLKIF_RSP_OKAY))
@@ -2484,7 +2483,7 @@ static void blkback_changed(struct xenbus_device *dev,
 	case XenbusStateClosed:
 		if (dev->state == XenbusStateClosed)
 			break;
-		/* fall through */
+		fallthrough;
 	case XenbusStateClosing:
 		if (info)
 			blkfront_closing(info);
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index fb5a901fd89e5..efb088df12766 100644
--- a/drivers/bus/ti-sysc.c
+++ b/drivers/bus/ti-sysc.c
@@ -1849,7 +1849,7 @@ static int sysc_clockdomain_init(struct sysc *ddata)
 	switch (ddata->nr_clocks) {
 	case 2:
 		ick = ddata->clocks[SYSC_ICK];
-		/* fallthrough */
+		fallthrough;
 	case 1:
 		fck = ddata->clocks[SYSC_FCK];
 		break;
diff --git a/drivers/char/agp/ali-agp.c b/drivers/char/agp/ali-agp.c
index 89527bae4602a..760d9a9312898 100644
--- a/drivers/char/agp/ali-agp.c
+++ b/drivers/char/agp/ali-agp.c
@@ -357,7 +357,7 @@ static int agp_ali_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		default:
 			break;
 		}
-		/*FALLTHROUGH*/
+		fallthrough;
 	default:
 		bridge->driver = &ali_generic_bridge;
 	}
diff --git a/drivers/char/ipmi/kcs_bmc.c b/drivers/char/ipmi/kcs_bmc.c
index ed4dc3b1843e3..f292e74bd4a51 100644
--- a/drivers/char/ipmi/kcs_bmc.c
+++ b/drivers/char/ipmi/kcs_bmc.c
@@ -99,7 +99,7 @@ static void kcs_bmc_handle_data(struct kcs_bmc *kcs_bmc)
 	switch (kcs_bmc->phase) {
 	case KCS_PHASE_WRITE_START:
 		kcs_bmc->phase = KCS_PHASE_WRITE_DATA;
-		/* fall through */
+		fallthrough;
 
 	case KCS_PHASE_WRITE_DATA:
 		if (kcs_bmc->data_in_idx < KCS_MSG_BUFSIZ) {
diff --git a/drivers/char/lp.c b/drivers/char/lp.c
index bd95aba1f9fe8..45932f05fd678 100644
--- a/drivers/char/lp.c
+++ b/drivers/char/lp.c
@@ -734,7 +734,7 @@ static long lp_ioctl(struct file *file, unsigned int cmd,
 			ret = lp_set_timeout32(minor, (void __user *)arg);
 			break;
 		}
-		/* fall through - for 64-bit */
+		fallthrough;	/* for 64-bit */
 	case LPSETTIMEOUT_NEW:
 		ret = lp_set_timeout64(minor, (void __user *)arg);
 		break;
@@ -762,7 +762,7 @@ static long lp_compat_ioctl(struct file *file, unsigned int cmd,
 			ret = lp_set_timeout32(minor, (void __user *)arg);
 			break;
 		}
-		/* fall through - for x32 mode */
+		fallthrough;	/* for x32 mode */
 	case LPSETTIMEOUT_NEW:
 		ret = lp_set_timeout64(minor, (void __user *)arg);
 		break;
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 687d4af6945d3..abd4ffdc8cdeb 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -791,7 +791,7 @@ static loff_t memory_lseek(struct file *file, loff_t offset, int orig)
 	switch (orig) {
 	case SEEK_CUR:
 		offset += file->f_pos;
-		/* fall through */
+		fallthrough;
 	case SEEK_SET:
 		/* to avoid userland mistaking f_pos=-9 as -EBADF=-9 */
 		if ((unsigned long long)offset >= -MAX_ERRNO) {
diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
index 8206412d25ba7..e9f694b368719 100644
--- a/drivers/char/nvram.c
+++ b/drivers/char/nvram.c
@@ -286,7 +286,7 @@ static long nvram_misc_ioctl(struct file *file, unsigned int cmd,
 #ifdef CONFIG_PPC
 	case OBSOLETE_PMAC_NVRAM_GET_OFFSET:
 		pr_warn("nvram: Using obsolete PMAC_NVRAM_GET_OFFSET ioctl\n");
-		/* fall through */
+		fallthrough;
 	case IOC_NVRAM_GET_OFFSET:
 		ret = -EINVAL;
 #ifdef CONFIG_PPC_PMAC
diff --git a/drivers/clocksource/timer-cadence-ttc.c b/drivers/clocksource/timer-cadence-ttc.c
index 38858e141731e..80e9606020307 100644
--- a/drivers/clocksource/timer-cadence-ttc.c
+++ b/drivers/clocksource/timer-cadence-ttc.c
@@ -309,7 +309,7 @@ static int ttc_rate_change_clocksource_cb(struct notifier_block *nb,
 		/* restore original register value */
 		writel_relaxed(ttccs->scale_clk_ctrl_reg_old,
 			       ttccs->ttc.base_addr + TTC_CLK_CNTRL_OFFSET);
-		/* fall through */
+		fallthrough;
 	default:
 		return NOTIFY_DONE;
 	}
@@ -392,7 +392,7 @@ static int ttc_rate_change_clockevent_cb(struct notifier_block *nb,
 
 		clockevents_update_freq(&ttcce->ce, ndata->new_rate / PRESCALE);
 
-		/* fall through */
+		fallthrough;
 	case PRE_RATE_CHANGE:
 	case ABORT_RATE_CHANGE:
 	default:
diff --git a/drivers/cpufreq/p4-clockmod.c b/drivers/cpufreq/p4-clockmod.c
index bb61677c11c71..ef0a3216a3862 100644
--- a/drivers/cpufreq/p4-clockmod.c
+++ b/drivers/cpufreq/p4-clockmod.c
@@ -129,7 +129,7 @@ static unsigned int cpufreq_p4_get_frequency(struct cpuinfo_x86 *c)
 			return speedstep_get_frequency(SPEEDSTEP_CPU_PCORE);
 		case 0x0D: /* Pentium M (Dothan) */
 			p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
-			/* fall through */
+			fallthrough;
 		case 0x09: /* Pentium M (Banias) */
 			return speedstep_get_frequency(SPEEDSTEP_CPU_PM);
 		}
diff --git a/drivers/cpufreq/speedstep-lib.c b/drivers/cpufreq/speedstep-lib.c
index 5c4f8f07c5a62..a13a2d1e444ed 100644
--- a/drivers/cpufreq/speedstep-lib.c
+++ b/drivers/cpufreq/speedstep-lib.c
@@ -366,7 +366,7 @@ enum speedstep_processor speedstep_detect_processor(void)
 			} else
 				return SPEEDSTEP_CPU_PIII_C;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		return 0;
 	}
diff --git a/drivers/cpufreq/ti-cpufreq.c b/drivers/cpufreq/ti-cpufreq.c
index ab0de27539ad4..8f9fdd864391a 100644
--- a/drivers/cpufreq/ti-cpufreq.c
+++ b/drivers/cpufreq/ti-cpufreq.c
@@ -86,11 +86,11 @@ static unsigned long dra7_efuse_xlate(struct ti_cpufreq_data *opp_data,
 	case DRA76_EFUSE_HAS_PLUS_MPU_OPP:
 	case DRA76_EFUSE_HAS_ALL_MPU_OPP:
 		calculated_efuse |= DRA76_EFUSE_PLUS_MPU_OPP;
-		/* Fall through */
+		fallthrough;
 	case DRA7_EFUSE_HAS_ALL_MPU_OPP:
 	case DRA7_EFUSE_HAS_HIGH_MPU_OPP:
 		calculated_efuse |= DRA7_EFUSE_HIGH_MPU_OPP;
-		/* Fall through */
+		fallthrough;
 	case DRA7_EFUSE_HAS_OD_MPU_OPP:
 		calculated_efuse |= DRA7_EFUSE_OD_MPU_OPP;
 	}
diff --git a/drivers/crypto/axis/artpec6_crypto.c b/drivers/crypto/axis/artpec6_crypto.c
index 1a46eeddf0824..809c3033ca748 100644
--- a/drivers/crypto/axis/artpec6_crypto.c
+++ b/drivers/crypto/axis/artpec6_crypto.c
@@ -2310,7 +2310,7 @@ static int artpec6_crypto_prepare_submit_hash(struct ahash_request *req)
 
 	case ARTPEC6_CRYPTO_PREPARE_HASH_NO_START:
 		ret = 0;
-		/* Fallthrough */
+		fallthrough;
 
 	default:
 		artpec6_crypto_common_destroy(&req_ctx->common);
diff --git a/drivers/crypto/cavium/cpt/cptvf_reqmanager.c b/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
index dc5fda5227198..4fe7898c85615 100644
--- a/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
+++ b/drivers/crypto/cavium/cpt/cptvf_reqmanager.c
@@ -90,11 +90,11 @@ static int setup_sgio_components(struct cpt_vf *cptvf, struct buf_ptr *list,
 	case 3:
 		sg_ptr->u.s.len2 = cpu_to_be16(list[i * 4 + 2].size);
 		sg_ptr->ptr2 = cpu_to_be64(list[i * 4 + 2].dma_addr);
-		/* Fall through */
+		fallthrough;
 	case 2:
 		sg_ptr->u.s.len1 = cpu_to_be16(list[i * 4 + 1].size);
 		sg_ptr->ptr1 = cpu_to_be64(list[i * 4 + 1].dma_addr);
-		/* Fall through */
+		fallthrough;
 	case 1:
 		sg_ptr->u.s.len0 = cpu_to_be16(list[i * 4 + 0].size);
 		sg_ptr->ptr0 = cpu_to_be64(list[i * 4 + 0].dma_addr);
diff --git a/drivers/crypto/chelsio/chcr_ktls.c b/drivers/crypto/chelsio/chcr_ktls.c
index 91dee616d15e7..c5cce024886ac 100644
--- a/drivers/crypto/chelsio/chcr_ktls.c
+++ b/drivers/crypto/chelsio/chcr_ktls.c
@@ -135,7 +135,7 @@ static int chcr_ktls_update_connection_state(struct chcr_ktls_info *tx_info,
 			break;
 		/* update to the next state and also initialize TCB */
 		tx_info->connection_state = new_state;
-		/* FALLTHRU */
+		fallthrough;
 	case KTLS_CONN_ACT_OPEN_RPL:
 		/* if we are stuck in this state, means tcb init might not
 		 * received by HW, try sending it again.
@@ -150,7 +150,7 @@ static int chcr_ktls_update_connection_state(struct chcr_ktls_info *tx_info,
 			break;
 		/* update to the next state and check if l2t_state is valid  */
 		tx_info->connection_state = new_state;
-		/* FALLTHRU */
+		fallthrough;
 	case KTLS_CONN_SET_TCB_RPL:
 		/* Check if l2t state is valid, then move to ready state. */
 		if (cxgb4_check_l2t_valid(tx_info->l2te)) {
diff --git a/drivers/crypto/marvell/octeontx/otx_cptvf_reqmgr.c b/drivers/crypto/marvell/octeontx/otx_cptvf_reqmgr.c
index cbc3d7869ebe4..c80baf1ad90b2 100644
--- a/drivers/crypto/marvell/octeontx/otx_cptvf_reqmgr.c
+++ b/drivers/crypto/marvell/octeontx/otx_cptvf_reqmgr.c
@@ -140,11 +140,11 @@ static inline int setup_sgio_components(struct pci_dev *pdev,
 	case 3:
 		sg_ptr->u.s.len2 = cpu_to_be16(list[i * 4 + 2].size);
 		sg_ptr->ptr2 = cpu_to_be64(list[i * 4 + 2].dma_addr);
-		/* Fall through */
+		fallthrough;
 	case 2:
 		sg_ptr->u.s.len1 = cpu_to_be16(list[i * 4 + 1].size);
 		sg_ptr->ptr1 = cpu_to_be64(list[i * 4 + 1].dma_addr);
-		/* Fall through */
+		fallthrough;
 	case 1:
 		sg_ptr->u.s.len0 = cpu_to_be16(list[i * 4 + 0].size);
 		sg_ptr->ptr0 = cpu_to_be64(list[i * 4 + 0].dma_addr);
diff --git a/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c b/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c
index 519fd5acf713b..8b090b7ae8c6b 100644
--- a/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c
+++ b/drivers/crypto/qat/qat_common/adf_pf2vf_msg.c
@@ -340,7 +340,7 @@ static int adf_vf2pf_request_version(struct adf_accel_dev *accel_dev)
 		/* VF is newer than PF and decides whether it is compatible */
 		if (accel_dev->vf.pf_version >= hw_data->min_iov_compat_ver)
 			break;
-		/* fall through */
+		fallthrough;
 	case ADF_PF2VF_VF_INCOMPATIBLE:
 		dev_err(&GET_DEV(accel_dev),
 			"PF (vers %d) and VF (vers %d) are not compatible\n",
diff --git a/drivers/crypto/qat/qat_common/qat_uclo.c b/drivers/crypto/qat/qat_common/qat_uclo.c
index bff759e2f8112..00c615f9f9a83 100644
--- a/drivers/crypto/qat/qat_common/qat_uclo.c
+++ b/drivers/crypto/qat/qat_common/qat_uclo.c
@@ -752,7 +752,7 @@ static int qat_uclo_init_reg(struct icp_qat_fw_loader_handle *handle,
 	case ICP_GPA_ABS:
 	case ICP_GPB_ABS:
 		ctx_mask = 0;
-		/* fall through */
+		fallthrough;
 	case ICP_GPA_REL:
 	case ICP_GPB_REL:
 		return qat_hal_init_gpr(handle, ae, ctx_mask, reg_type,
@@ -762,7 +762,7 @@ static int qat_uclo_init_reg(struct icp_qat_fw_loader_handle *handle,
 	case ICP_SR_RD_ABS:
 	case ICP_DR_RD_ABS:
 		ctx_mask = 0;
-		/* fall through */
+		fallthrough;
 	case ICP_SR_REL:
 	case ICP_DR_REL:
 	case ICP_SR_RD_REL:
@@ -772,7 +772,7 @@ static int qat_uclo_init_reg(struct icp_qat_fw_loader_handle *handle,
 	case ICP_SR_WR_ABS:
 	case ICP_DR_WR_ABS:
 		ctx_mask = 0;
-		/* fall through */
+		fallthrough;
 	case ICP_SR_WR_REL:
 	case ICP_DR_WR_REL:
 		return qat_hal_init_wr_xfer(handle, ae, ctx_mask, reg_type,
diff --git a/drivers/crypto/ux500/cryp/cryp.c b/drivers/crypto/ux500/cryp/cryp.c
index f22f6fa612b37..9866c2a5e9a70 100644
--- a/drivers/crypto/ux500/cryp/cryp.c
+++ b/drivers/crypto/ux500/cryp/cryp.c
@@ -314,17 +314,17 @@ void cryp_save_device_context(struct cryp_device_data *device_data,
 	case CRYP_KEY_SIZE_256:
 		ctx->key_4_l = readl_relaxed(&src_reg->key_4_l);
 		ctx->key_4_r = readl_relaxed(&src_reg->key_4_r);
-		/* Fall through */
+		fallthrough;
 
 	case CRYP_KEY_SIZE_192:
 		ctx->key_3_l = readl_relaxed(&src_reg->key_3_l);
 		ctx->key_3_r = readl_relaxed(&src_reg->key_3_r);
-		/* Fall through */
+		fallthrough;
 
 	case CRYP_KEY_SIZE_128:
 		ctx->key_2_l = readl_relaxed(&src_reg->key_2_l);
 		ctx->key_2_r = readl_relaxed(&src_reg->key_2_r);
-		/* Fall through */
+		fallthrough;
 
 	default:
 		ctx->key_1_l = readl_relaxed(&src_reg->key_1_l);
@@ -364,17 +364,17 @@ void cryp_restore_device_context(struct cryp_device_data *device_data,
 	case CRYP_KEY_SIZE_256:
 		writel_relaxed(ctx->key_4_l, &reg->key_4_l);
 		writel_relaxed(ctx->key_4_r, &reg->key_4_r);
-		/* Fall through */
+		fallthrough;
 
 	case CRYP_KEY_SIZE_192:
 		writel_relaxed(ctx->key_3_l, &reg->key_3_l);
 		writel_relaxed(ctx->key_3_r, &reg->key_3_r);
-		/* Fall through */
+		fallthrough;
 
 	case CRYP_KEY_SIZE_128:
 		writel_relaxed(ctx->key_2_l, &reg->key_2_l);
 		writel_relaxed(ctx->key_2_r, &reg->key_2_r);
-		/* Fall through */
+		fallthrough;
 
 	default:
 		writel_relaxed(ctx->key_1_l, &reg->key_1_l);
diff --git a/drivers/dma/amba-pl08x.c b/drivers/dma/amba-pl08x.c
index 9adc7a2fa3d3b..a24882ba37643 100644
--- a/drivers/dma/amba-pl08x.c
+++ b/drivers/dma/amba-pl08x.c
@@ -1767,7 +1767,7 @@ static u32 pl08x_memcpy_cctl(struct pl08x_driver_data *pl08x)
 	default:
 		dev_err(&pl08x->adev->dev,
 			"illegal burst size for memcpy, set to 1\n");
-		/* Fall through */
+		fallthrough;
 	case PL08X_BURST_SZ_1:
 		cctl |= PL080_BSIZE_1 << PL080_CONTROL_SB_SIZE_SHIFT |
 			PL080_BSIZE_1 << PL080_CONTROL_DB_SIZE_SHIFT;
@@ -1806,7 +1806,7 @@ static u32 pl08x_memcpy_cctl(struct pl08x_driver_data *pl08x)
 	default:
 		dev_err(&pl08x->adev->dev,
 			"illegal bus width for memcpy, set to 8 bits\n");
-		/* Fall through */
+		fallthrough;
 	case PL08X_BUS_WIDTH_8_BITS:
 		cctl |= PL080_WIDTH_8BIT << PL080_CONTROL_SWIDTH_SHIFT |
 			PL080_WIDTH_8BIT << PL080_CONTROL_DWIDTH_SHIFT;
@@ -1850,7 +1850,7 @@ static u32 pl08x_ftdmac020_memcpy_cctl(struct pl08x_driver_data *pl08x)
 	default:
 		dev_err(&pl08x->adev->dev,
 			"illegal bus width for memcpy, set to 8 bits\n");
-		/* Fall through */
+		fallthrough;
 	case PL08X_BUS_WIDTH_8_BITS:
 		cctl |= PL080_WIDTH_8BIT << FTDMAC020_LLI_SRC_WIDTH_SHIFT |
 			PL080_WIDTH_8BIT << FTDMAC020_LLI_DST_WIDTH_SHIFT;
@@ -2612,7 +2612,7 @@ static int pl08x_of_probe(struct amba_device *adev,
 	switch (val) {
 	default:
 		dev_err(&adev->dev, "illegal burst size for memcpy, set to 1\n");
-		/* Fall through */
+		fallthrough;
 	case 1:
 		pd->memcpy_burst_size = PL08X_BURST_SZ_1;
 		break;
@@ -2647,7 +2647,7 @@ static int pl08x_of_probe(struct amba_device *adev,
 	switch (val) {
 	default:
 		dev_err(&adev->dev, "illegal bus width for memcpy, set to 8 bits\n");
-		/* Fall through */
+		fallthrough;
 	case 8:
 		pd->memcpy_bus_width = PL08X_BUS_WIDTH_8_BITS;
 		break;
diff --git a/drivers/dma/fsldma.c b/drivers/dma/fsldma.c
index ad72b3f42ffa0..e342cf52d2966 100644
--- a/drivers/dma/fsldma.c
+++ b/drivers/dma/fsldma.c
@@ -1163,7 +1163,7 @@ static int fsl_dma_chan_probe(struct fsldma_device *fdev,
 	switch (chan->feature & FSL_DMA_IP_MASK) {
 	case FSL_DMA_IP_85XX:
 		chan->toggle_ext_pause = fsl_chan_toggle_ext_pause;
-		/* Fall through */
+		fallthrough;
 	case FSL_DMA_IP_83XX:
 		chan->toggle_ext_start = fsl_chan_toggle_ext_start;
 		chan->set_src_loop_size = fsl_chan_set_src_loop_size;
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index 5c0fb3134825f..88717506c1f6b 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -556,7 +556,7 @@ static int imxdma_xfer_desc(struct imxdma_desc *d)
 		 * We fall-through here intentionally, since a 2D transfer is
 		 * similar to MEMCPY just adding the 2D slot configuration.
 		 */
-		/* Fall through */
+		fallthrough;
 	case IMXDMA_DESC_MEMCPY:
 		imx_dmav1_writel(imxdma, d->src, DMA_SAR(imxdmac->channel));
 		imx_dmav1_writel(imxdma, d->dest, DMA_DAR(imxdmac->channel));
diff --git a/drivers/dma/iop-adma.h b/drivers/dma/iop-adma.h
index c499c9578f009..d44eabb6f5ebd 100644
--- a/drivers/dma/iop-adma.h
+++ b/drivers/dma/iop-adma.h
@@ -496,7 +496,7 @@ iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt,
 		}
 		hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = edcr;
 		src_cnt = 24;
-		/* fall through */
+		fallthrough;
 	case 17 ... 24:
 		if (!u_desc_ctrl.field.blk_ctrl) {
 			hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
@@ -510,7 +510,7 @@ iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt,
 		}
 		hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = edcr;
 		src_cnt = 16;
-		/* fall through */
+		fallthrough;
 	case 9 ... 16:
 		if (!u_desc_ctrl.field.blk_ctrl)
 			u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
@@ -522,7 +522,7 @@ iop3xx_desc_init_xor(struct iop3xx_desc_aau *hw_desc, int src_cnt,
 		}
 		hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = edcr;
 		src_cnt = 8;
-		/* fall through */
+		fallthrough;
 	case 2 ... 8:
 		shift = 1;
 		for (i = 0; i < src_cnt; i++) {
@@ -602,19 +602,19 @@ iop_desc_init_null_xor(struct iop_adma_desc_slot *desc, int src_cnt,
 	case 25 ... 32:
 		u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
 		hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
-		/* fall through */
+		fallthrough;
 	case 17 ... 24:
 		if (!u_desc_ctrl.field.blk_ctrl) {
 			hw_desc->src_edc[AAU_EDCR2_IDX].e_desc_ctrl = 0;
 			u_desc_ctrl.field.blk_ctrl = 0x3; /* use EDCR[2:0] */
 		}
 		hw_desc->src_edc[AAU_EDCR1_IDX].e_desc_ctrl = 0;
-		/* fall through */
+		fallthrough;
 	case 9 ... 16:
 		if (!u_desc_ctrl.field.blk_ctrl)
 			u_desc_ctrl.field.blk_ctrl = 0x2; /* use EDCR0 */
 		hw_desc->src_edc[AAU_EDCR0_IDX].e_desc_ctrl = 0;
-		/* fall through */
+		fallthrough;
 	case 1 ... 8:
 		if (!u_desc_ctrl.field.blk_ctrl && src_cnt > 4)
 			u_desc_ctrl.field.blk_ctrl = 0x1; /* use mini-desc */
diff --git a/drivers/dma/nbpfaxi.c b/drivers/dma/nbpfaxi.c
index 74df621402e10..ca4e0930207a0 100644
--- a/drivers/dma/nbpfaxi.c
+++ b/drivers/dma/nbpfaxi.c
@@ -483,7 +483,7 @@ static size_t nbpf_xfer_size(struct nbpf_device *nbpf,
 
 	default:
 		pr_warn("%s(): invalid bus width %u\n", __func__, width);
-		/* fall through */
+		fallthrough;
 	case DMA_SLAVE_BUSWIDTH_1_BYTE:
 		size = burst;
 	}
diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 2c508ee672b90..9b69716172a4d 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -1061,16 +1061,16 @@ static bool _start(struct pl330_thread *thrd)
 
 		if (_state(thrd) == PL330_STATE_KILLING)
 			UNTIL(thrd, PL330_STATE_STOPPED)
-		/* fall through */
+		fallthrough;
 
 	case PL330_STATE_FAULTING:
 		_stop(thrd);
-		/* fall through */
+		fallthrough;
 
 	case PL330_STATE_KILLING:
 	case PL330_STATE_COMPLETING:
 		UNTIL(thrd, PL330_STATE_STOPPED)
-		/* fall through */
+		fallthrough;
 
 	case PL330_STATE_STOPPED:
 		return _trigger(thrd);
@@ -1121,7 +1121,6 @@ static u32 _emit_load(unsigned int dry_run, u8 buf[],
 
 	switch (direction) {
 	case DMA_MEM_TO_MEM:
-		/* fall through */
 	case DMA_MEM_TO_DEV:
 		off += _emit_LD(dry_run, &buf[off], cond);
 		break;
@@ -1155,7 +1154,6 @@ static inline u32 _emit_store(unsigned int dry_run, u8 buf[],
 
 	switch (direction) {
 	case DMA_MEM_TO_MEM:
-		/* fall through */
 	case DMA_DEV_TO_MEM:
 		off += _emit_ST(dry_run, &buf[off], cond);
 		break;
@@ -1216,7 +1214,6 @@ static int _bursts(struct pl330_dmac *pl330, unsigned dry_run, u8 buf[],
 
 	switch (pxs->desc->rqtype) {
 	case DMA_MEM_TO_DEV:
-		/* fall through */
 	case DMA_DEV_TO_MEM:
 		off += _ldst_peripheral(pl330, dry_run, &buf[off], pxs, cyc,
 			cond);
@@ -1266,7 +1263,6 @@ static int _dregs(struct pl330_dmac *pl330, unsigned int dry_run, u8 buf[],
 
 	switch (pxs->desc->rqtype) {
 	case DMA_MEM_TO_DEV:
-		/* fall through */
 	case DMA_DEV_TO_MEM:
 		off += _emit_MOV(dry_run, &buf[off], CCR, dregs_ccr);
 		off += _ldst_peripheral(pl330, dry_run, &buf[off], pxs, 1,
diff --git a/drivers/dma/sh/shdma-base.c b/drivers/dma/sh/shdma-base.c
index 2deeaab078a46..788d696323bbe 100644
--- a/drivers/dma/sh/shdma-base.c
+++ b/drivers/dma/sh/shdma-base.c
@@ -383,7 +383,7 @@ static dma_async_tx_callback __ld_cleanup(struct shdma_chan *schan, bool all)
 			switch (desc->mark) {
 			case DESC_COMPLETED:
 				desc->mark = DESC_WAITING;
-				/* Fall through */
+				fallthrough;
 			case DESC_WAITING:
 				if (head_acked)
 					async_tx_ack(&desc->async_tx);
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 6262f6370c5de..fcc08bbf6945f 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -3375,7 +3375,7 @@ static struct amd64_family_type *per_family_init(struct amd64_pvt *pvt)
 			pvt->ops = &family_types[F17_M70H_CPUS].ops;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case 0x18:
 		fam_type	= &family_types[F17_CPUS];
 		pvt->ops	= &family_types[F17_CPUS].ops;
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index b8fc4b84fd867..928f63a374c78 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -198,7 +198,7 @@ static int apl_rd_reg(int port, int off, int op, void *data, size_t sz, char *na
 	switch (sz) {
 	case 8:
 		ret = _apl_rd_reg(port, off + 4, op, (u32 *)(data + 4));
-		/* fall through */
+		fallthrough;
 	case 4:
 		ret |= _apl_rd_reg(port, off, op, (u32 *)data);
 		pnd2_printk(KERN_DEBUG, "%s=%x%08x ret=%d\n", name,
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index b785e936244f5..80db43a220698 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -957,7 +957,7 @@ static void set_broadcast_channel(struct fw_device *device, int generation)
 				device->bc_implemented = BC_IMPLEMENTED;
 				break;
 			}
-			/* else, fall through - to case address error */
+			fallthrough;	/* to case address error */
 		case RCODE_ADDRESS_ERROR:
 			device->bc_implemented = BC_UNIMPLEMENTED;
 		}
diff --git a/drivers/firewire/core-iso.c b/drivers/firewire/core-iso.c
index 185b0b78b3d68..af70e74f9a7e1 100644
--- a/drivers/firewire/core-iso.c
+++ b/drivers/firewire/core-iso.c
@@ -277,7 +277,7 @@ static int manage_channel(struct fw_card *card, int irm_id, int generation,
 			if ((data[0] & bit) == (data[1] & bit))
 				continue;
 
-			/* fall through - It's a 1394-1995 IRM, retry. */
+			fallthrough;	/* It's a 1394-1995 IRM, retry */
 		default:
 			if (retry) {
 				retry--;
diff --git a/drivers/firewire/core-topology.c b/drivers/firewire/core-topology.c
index 94a13fca82673..ec68ed27b0a5f 100644
--- a/drivers/firewire/core-topology.c
+++ b/drivers/firewire/core-topology.c
@@ -54,7 +54,7 @@ static u32 *count_ports(u32 *sid, int *total_port_count, int *child_port_count)
 		switch (port_type) {
 		case SELFID_PORT_CHILD:
 			(*child_port_count)++;
-			/* fall through */
+			fallthrough;
 		case SELFID_PORT_PARENT:
 		case SELFID_PORT_NCONN:
 			(*total_port_count)++;
diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index 439d918bbaafa..ac487c96bb717 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -1097,14 +1097,14 @@ static void handle_registers(struct fw_card *card, struct fw_request *request,
 			rcode = RCODE_ADDRESS_ERROR;
 			break;
 		}
-		/* else fall through */
+		fallthrough;
 
 	case CSR_NODE_IDS:
 		/*
 		 * per IEEE 1394-2008 8.3.22.3, not IEEE 1394.1-2004 3.2.8
 		 * and 9.6, but interoperable with IEEE 1394.1-2004 bridges
 		 */
-		/* fall through */
+		fallthrough;
 
 	case CSR_STATE_CLEAR:
 	case CSR_STATE_SET:
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index 7dde21b18b04c..020cb15a4d8fc 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -1495,7 +1495,7 @@ static int handle_at_packet(struct context *context,
 			packet->ack = RCODE_GENERATION;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 
 	default:
 		packet->ack = RCODE_SEND_ERROR;
@@ -3054,7 +3054,7 @@ static int ohci_start_iso(struct fw_iso_context *base,
 
 	case FW_ISO_CONTEXT_RECEIVE_MULTICHANNEL:
 		control |= IR_CONTEXT_BUFFER_FILL|IR_CONTEXT_MULTI_CHANNEL_MODE;
-		/* fall through */
+		fallthrough;
 	case FW_ISO_CONTEXT_RECEIVE:
 		index = ctx - ohci->ir_context_list;
 		match = (tags << 28) | (sync << 8) | ctx->base.channel;
diff --git a/drivers/gpio/gpio-aspeed-sgpio.c b/drivers/gpio/gpio-aspeed-sgpio.c
index d16645c1d8d9d..3aa45934d60c4 100644
--- a/drivers/gpio/gpio-aspeed-sgpio.c
+++ b/drivers/gpio/gpio-aspeed-sgpio.c
@@ -303,16 +303,16 @@ static int aspeed_sgpio_set_type(struct irq_data *d, unsigned int type)
 	switch (type & IRQ_TYPE_SENSE_MASK) {
 	case IRQ_TYPE_EDGE_BOTH:
 		type2 |= bit;
-		/* fall through */
+		fallthrough;
 	case IRQ_TYPE_EDGE_RISING:
 		type0 |= bit;
-		/* fall through */
+		fallthrough;
 	case IRQ_TYPE_EDGE_FALLING:
 		handler = handle_edge_irq;
 		break;
 	case IRQ_TYPE_LEVEL_HIGH:
 		type0 |= bit;
-		/* fall through */
+		fallthrough;
 	case IRQ_TYPE_LEVEL_LOW:
 		type1 |= bit;
 		handler = handle_level_irq;
diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c
index 879db23d84549..bf08b4561f361 100644
--- a/drivers/gpio/gpio-aspeed.c
+++ b/drivers/gpio/gpio-aspeed.c
@@ -611,16 +611,16 @@ static int aspeed_gpio_set_type(struct irq_data *d, unsigned int type)
 	switch (type & IRQ_TYPE_SENSE_MASK) {
 	case IRQ_TYPE_EDGE_BOTH:
 		type2 |= bit;
-		/* fall through */
+		fallthrough;
 	case IRQ_TYPE_EDGE_RISING:
 		type0 |= bit;
-		/* fall through */
+		fallthrough;
 	case IRQ_TYPE_EDGE_FALLING:
 		handler = handle_edge_irq;
 		break;
 	case IRQ_TYPE_LEVEL_HIGH:
 		type0 |= bit;
-		/* fall through */
+		fallthrough;
 	case IRQ_TYPE_LEVEL_LOW:
 		type1 |= bit;
 		handler = handle_level_irq;
diff --git a/drivers/gpio/gpio-ath79.c b/drivers/gpio/gpio-ath79.c
index 53fae02c40ad8..d5359341cc6b2 100644
--- a/drivers/gpio/gpio-ath79.c
+++ b/drivers/gpio/gpio-ath79.c
@@ -129,7 +129,7 @@ static int ath79_gpio_irq_set_type(struct irq_data *data,
 
 	case IRQ_TYPE_LEVEL_HIGH:
 		polarity |= mask;
-		/* fall through */
+		fallthrough;
 	case IRQ_TYPE_LEVEL_LOW:
 		type |= mask;
 		break;
diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index 8c97577740100..ad61daf6c2125 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -617,14 +617,12 @@ static int sprd_eic_probe(struct platform_device *pdev)
 		sprd_eic->chip.free = sprd_eic_free;
 		sprd_eic->chip.set_config = sprd_eic_set_config;
 		sprd_eic->chip.set = sprd_eic_set;
-		/* fall-through */
+		fallthrough;
 	case SPRD_EIC_ASYNC:
-		/* fall-through */
 	case SPRD_EIC_SYNC:
 		sprd_eic->chip.get = sprd_eic_get;
 		break;
 	case SPRD_EIC_LATCH:
-		/* fall-through */
 	default:
 		break;
 	}
diff --git a/drivers/gpio/gpio-stmpe.c b/drivers/gpio/gpio-stmpe.c
index 6c48809d0505b..b0155d6007c81 100644
--- a/drivers/gpio/gpio-stmpe.c
+++ b/drivers/gpio/gpio-stmpe.c
@@ -308,7 +308,7 @@ static void stmpe_dbg_show_one(struct seq_file *s,
 			if (ret < 0)
 				return;
 			edge_det = !!(ret & mask);
-			/* fall through */
+			fallthrough;
 		case STMPE1801:
 			rise_reg = stmpe->regs[STMPE_IDX_GPRER_LSB + bank];
 			fall_reg = stmpe->regs[STMPE_IDX_GPFER_LSB + bank];
@@ -321,7 +321,7 @@ static void stmpe_dbg_show_one(struct seq_file *s,
 			if (ret < 0)
 				return;
 			fall = !!(ret & mask);
-			/* fall through */
+			fallthrough;
 		case STMPE801:
 		case STMPE1600:
 			irqen_reg = stmpe->regs[STMPE_IDX_IEGPIOR_LSB + bank];
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 9276051663dad..54ca3c18b291c 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -1264,7 +1264,7 @@ static int acpi_gpio_package_count(const union acpi_object *obj)
 		switch (element->type) {
 		case ACPI_TYPE_LOCAL_REFERENCE:
 			element += 3;
-			/* Fallthrough */
+			fallthrough;
 		case ACPI_TYPE_INTEGER:
 			element++;
 			count++;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10_3.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10_3.c
index 7e59e473a1901..cdea1338c8dc0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10_3.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v10_3.c
@@ -152,7 +152,7 @@ static uint32_t get_sdma_rlc_reg_offset(struct amdgpu_device *adev,
 		dev_warn(adev->dev,
 			 "Invalid sdma engine id (%d), using engine id 0\n",
 			 engine_id);
-		/* fall through */
+		fallthrough;
 	case 0:
 		sdma_engine_reg_base = SOC15_REG_OFFSET(SDMA0, 0,
 				mmSDMA0_RLC0_RB_CNTL) - mmSDMA0_RLC0_RB_CNTL;
diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
index 33f1c4a46ebe0..88f63d7ea3712 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
@@ -3250,7 +3250,7 @@ static void gfx_v8_0_tiling_mode_table_init(struct amdgpu_device *adev)
 		dev_warn(adev->dev,
 			 "Unknown chip type (%d) in function gfx_v8_0_tiling_mode_table_init() falling through to CHIP_CARRIZO\n",
 			 adev->asic_type);
-		/* fall through */
+		fallthrough;
 
 	case CHIP_CARRIZO:
 		modearray[0] = (ARRAY_MODE(ARRAY_2D_TILED_THIN1) |
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 6e4f3ff4810f1..b67ba38a195f7 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1297,7 +1297,7 @@ static void gmc_v9_0_init_golden_registers(struct amdgpu_device *adev)
 	case CHIP_VEGA10:
 		if (amdgpu_sriov_vf(adev))
 			break;
-		/* fall through */
+		fallthrough;
 	case CHIP_VEGA20:
 		soc15_program_register_sequence(adev,
 						golden_settings_mmhub_1_0_0,
diff --git a/drivers/gpu/drm/amd/amdgpu/si_dpm.c b/drivers/gpu/drm/amd/amdgpu/si_dpm.c
index ea914b256ebd6..b5986d19dc08b 100644
--- a/drivers/gpu/drm/amd/amdgpu/si_dpm.c
+++ b/drivers/gpu/drm/amd/amdgpu/si_dpm.c
@@ -6196,7 +6196,7 @@ static void si_request_link_speed_change_before_state_change(struct amdgpu_devic
 			si_pi->force_pcie_gen = AMDGPU_PCIE_GEN2;
 			if (current_link_speed == AMDGPU_PCIE_GEN2)
 				break;
-			/* fall through */
+			fallthrough;
 		case AMDGPU_PCIE_GEN2:
 			if (amdgpu_acpi_pcie_performance_request(adev, PCIE_PERF_REQ_PECI_GEN2, false) == 0)
 				break;
diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
index ca570b1354787..e9de542f9b7c5 100644
--- a/drivers/gpu/drm/arm/malidp_hw.c
+++ b/drivers/gpu/drm/arm/malidp_hw.c
@@ -532,7 +532,7 @@ static int malidp500_enable_memwrite(struct malidp_hw_device *hwdev,
 		malidp_hw_write(hwdev, lower_32_bits(addrs[1]), base + MALIDP_MW_P2_PTR_LOW);
 		malidp_hw_write(hwdev, upper_32_bits(addrs[1]), base + MALIDP_MW_P2_PTR_HIGH);
 		malidp_hw_write(hwdev, pitches[1], base + MALIDP_MW_P2_STRIDE);
-		/* fall through */
+		fallthrough;
 	case 1:
 		malidp_hw_write(hwdev, lower_32_bits(addrs[0]), base + MALIDP_MW_P1_PTR_LOW);
 		malidp_hw_write(hwdev, upper_32_bits(addrs[0]), base + MALIDP_MW_P1_PTR_HIGH);
@@ -869,7 +869,7 @@ static int malidp550_enable_memwrite(struct malidp_hw_device *hwdev,
 		malidp_hw_write(hwdev, lower_32_bits(addrs[1]), base + MALIDP_MW_P2_PTR_LOW);
 		malidp_hw_write(hwdev, upper_32_bits(addrs[1]), base + MALIDP_MW_P2_PTR_HIGH);
 		malidp_hw_write(hwdev, pitches[1], base + MALIDP_MW_P2_STRIDE);
-		/* fall through */
+		fallthrough;
 	case 1:
 		malidp_hw_write(hwdev, lower_32_bits(addrs[0]), base + MALIDP_MW_P1_PTR_LOW);
 		malidp_hw_write(hwdev, upper_32_bits(addrs[0]), base + MALIDP_MW_P1_PTR_HIGH);
@@ -1324,7 +1324,7 @@ static irqreturn_t malidp_se_irq(int irq, void *arg)
 			break;
 		case MW_RESTART:
 			drm_writeback_signal_completion(&malidp->mw_connector, 0);
-			/* fall through - to a new start */
+			fallthrough;	/* to a new start */
 		case MW_START:
 			/* writeback started, need to emulate one-shot mode */
 			hw->disable_memwrite(hwdev);
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index dd12b55d57a24..6a9fba051d136 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -238,7 +238,7 @@ static int ast_detect_chip(struct drm_device *dev, bool *need_post)
 					ast->dp501_fw_addr = NULL;
 				}
 			}
-			/* fallthrough */
+			fallthrough;
 		case 0x0c:
 			ast->tx_chip_type = AST_TX_DP501;
 		}
diff --git a/drivers/gpu/drm/bridge/nwl-dsi.c b/drivers/gpu/drm/bridge/nwl-dsi.c
index ce94f797d090f..66b67402f1acd 100644
--- a/drivers/gpu/drm/bridge/nwl-dsi.c
+++ b/drivers/gpu/drm/bridge/nwl-dsi.c
@@ -409,7 +409,6 @@ static bool nwl_dsi_read_packet(struct nwl_dsi *dsi, u32 status)
 
 		switch (data_type) {
 		case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
-			fallthrough;
 		case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
 			if (xfer->msg->rx_len > 1) {
 				/* read second byte */
@@ -418,7 +417,6 @@ static bool nwl_dsi_read_packet(struct nwl_dsi *dsi, u32 status)
 			}
 			fallthrough;
 		case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
-			fallthrough;
 		case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
 			if (xfer->msg->rx_len > 0) {
 				/* read first byte */
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
index d7e65c8694153..9fef6413741dc 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
@@ -61,10 +61,10 @@ static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
 	switch (hparms->channels) {
 	case 7 ... 8:
 		conf0 |= HDMI_AUD_CONF0_I2S_EN3;
-		/* Fall-thru */
+		fallthrough;
 	case 5 ... 6:
 		conf0 |= HDMI_AUD_CONF0_I2S_EN2;
-		/* Fall-thru */
+		fallthrough;
 	case 3 ... 4:
 		conf0 |= HDMI_AUD_CONF0_I2S_EN1;
 		/* Fall-thru */
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
index 86b9f0f87a14b..5b6e19ecbc84e 100644
--- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
+++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
@@ -604,13 +604,13 @@ static void ti_sn_bridge_read_valid_rates(struct ti_sn_bridge *pdata,
 		DRM_DEV_ERROR(pdata->dev,
 			      "Unexpected max rate (%#x); assuming 5.4 GHz\n",
 			      (int)dpcd_val);
-		/* fall through */
+		fallthrough;
 	case DP_LINK_BW_5_4:
 		rate_valid[7] = 1;
-		/* fall through */
+		fallthrough;
 	case DP_LINK_BW_2_7:
 		rate_valid[4] = 1;
-		/* fall through */
+		fallthrough;
 	case DP_LINK_BW_1_62:
 		rate_valid[1] = 1;
 		break;
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index a0735fbc144b2..7a01d0918861c 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -537,7 +537,7 @@ int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
 	switch (map->type) {
 	case _DRM_REGISTERS:
 		iounmap(map->handle);
-		/* FALLTHROUGH */
+		fallthrough;
 	case _DRM_FRAME_BUFFER:
 		arch_phys_wc_del(map->mtrr);
 		break;
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index a3c82e726057a..092c8c9859114 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -492,7 +492,7 @@ int drm_dp_downstream_max_bpc(const u8 dpcd[DP_RECEIVER_CAP_SIZE],
 		case DP_DS_16BPC:
 			return 16;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		return 0;
 	}
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 14b6f7638728c..501b4fe55a3db 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -1930,7 +1930,7 @@ void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
 	default:
 		WARN(1, "Invalid aspect ratio (0%x) on mode\n",
 		     in->picture_aspect_ratio);
-		/* fall through */
+		fallthrough;
 	case HDMI_PICTURE_ASPECT_NONE:
 		out->flags |= DRM_MODE_FLAG_PIC_AR_NONE;
 		break;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_dsi.c b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
index 7a6f6df5e9540..b38e9b592b8a5 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dsi.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dsi.c
@@ -987,10 +987,10 @@ static void exynos_dsi_send_to_fifo(struct exynos_dsi *dsi,
 	switch (length) {
 	case 3:
 		reg |= payload[2] << 16;
-		/* Fall through */
+		fallthrough;
 	case 2:
 		reg |= payload[1] << 8;
-		/* Fall through */
+		fallthrough;
 	case 1:
 		reg |= payload[0];
 		exynos_dsi_write(dsi, DSIM_PAYLOAD_REG, reg);
@@ -1038,7 +1038,7 @@ static void exynos_dsi_read_from_fifo(struct exynos_dsi *dsi,
 				payload[1] = reg >> 16;
 				++xfer->rx_done;
 			}
-			/* Fall through */
+			fallthrough;
 		case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
 		case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
 			payload[0] = reg >> 8;
@@ -1082,10 +1082,10 @@ static void exynos_dsi_read_from_fifo(struct exynos_dsi *dsi,
 		switch (length) {
 		case 3:
 			payload[2] = (reg >> 16) & 0xff;
-			/* Fall through */
+			fallthrough;
 		case 2:
 			payload[1] = (reg >> 8) & 0xff;
-			/* Fall through */
+			fallthrough;
 		case 1:
 			payload[0] = reg & 0xff;
 		}
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
index 86fac677fe69b..3c6d9f3913d56 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_plane.c
@@ -101,19 +101,19 @@ static void fsl_dcu_drm_plane_atomic_update(struct drm_plane *plane,
 		break;
 	case DRM_FORMAT_ARGB8888:
 		alpha = DCU_LAYER_AB_WHOLE_FRAME;
-		/* fall-through */
+		fallthrough;
 	case DRM_FORMAT_XRGB8888:
 		bpp = FSL_DCU_ARGB8888;
 		break;
 	case DRM_FORMAT_ARGB4444:
 		alpha = DCU_LAYER_AB_WHOLE_FRAME;
-		/* fall-through */
+		fallthrough;
 	case DRM_FORMAT_XRGB4444:
 		bpp = FSL_DCU_ARGB4444;
 		break;
 	case DRM_FORMAT_ARGB1555:
 		alpha = DCU_LAYER_AB_WHOLE_FRAME;
-		/* fall-through */
+		fallthrough;
 	case DRM_FORMAT_XRGB1555:
 		bpp = FSL_DCU_ARGB1555;
 		break;
diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c
index 8c55f5bee9ab6..f4053dd6bde90 100644
--- a/drivers/gpu/drm/i915/display/icl_dsi.c
+++ b/drivers/gpu/drm/i915/display/icl_dsi.c
@@ -712,7 +712,7 @@ gen11_dsi_configure_transcoder(struct intel_encoder *encoder,
 			switch (intel_dsi->pixel_format) {
 			default:
 				MISSING_CASE(intel_dsi->pixel_format);
-				/* fallthrough */
+				fallthrough;
 			case MIPI_DSI_FMT_RGB565:
 				tmp |= PIX_FMT_RGB565;
 				break;
@@ -739,7 +739,7 @@ gen11_dsi_configure_transcoder(struct intel_encoder *encoder,
 			switch (intel_dsi->video_mode_format) {
 			default:
 				MISSING_CASE(intel_dsi->video_mode_format);
-				/* fallthrough */
+				fallthrough;
 			case VIDEO_MODE_NON_BURST_WITH_SYNC_EVENTS:
 				tmp |= VIDEO_MODE_SYNC_EVENT;
 				break;
@@ -792,7 +792,7 @@ gen11_dsi_configure_transcoder(struct intel_encoder *encoder,
 		switch (pipe) {
 		default:
 			MISSING_CASE(pipe);
-			/* fallthrough */
+			fallthrough;
 		case PIPE_A:
 			tmp |= TRANS_DDI_EDP_INPUT_A_ON;
 			break;
diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index c53c85d38fa52..a0a41ec5c3419 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -905,7 +905,7 @@ parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
 			drm_dbg_kms(&dev_priv->drm,
 				    "VBT tp1 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
 				    psr_table->tp1_wakeup_time);
-			/* fallthrough */
+			fallthrough;
 		case 2:
 			dev_priv->vbt.psr.tp1_wakeup_time_us = 2500;
 			break;
@@ -925,7 +925,7 @@ parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
 			drm_dbg_kms(&dev_priv->drm,
 				    "VBT tp2_tp3 wakeup time value %d is outside range[0-3], defaulting to max value 2500us\n",
 				    psr_table->tp2_tp3_wakeup_time);
-			/* fallthrough */
+			fallthrough;
 		case 2:
 			dev_priv->vbt.psr.tp2_tp3_wakeup_time_us = 2500;
 		break;
@@ -1775,7 +1775,7 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv,
 		switch (child->hdmi_max_data_rate) {
 		default:
 			MISSING_CASE(child->hdmi_max_data_rate);
-			/* fall through */
+			fallthrough;
 		case HDMI_MAX_DATA_RATE_PLATFORM:
 			max_tmds_clock = 0;
 			break;
diff --git a/drivers/gpu/drm/i915/display/intel_cdclk.c b/drivers/gpu/drm/i915/display/intel_cdclk.c
index bb91dace304ad..91a8161e7c051 100644
--- a/drivers/gpu/drm/i915/display/intel_cdclk.c
+++ b/drivers/gpu/drm/i915/display/intel_cdclk.c
@@ -326,7 +326,7 @@ static void pnv_get_cdclk(struct drm_i915_private *dev_priv,
 	default:
 		drm_err(&dev_priv->drm,
 			"Unknown pnv display core clock 0x%04x\n", gcfgc);
-		/* fall through */
+		fallthrough;
 	case GC_DISPLAY_CLOCK_133_MHZ_PNV:
 		cdclk_config->cdclk = 133333;
 		break;
@@ -766,7 +766,7 @@ static void bdw_set_cdclk(struct drm_i915_private *dev_priv,
 	switch (cdclk) {
 	default:
 		MISSING_CASE(cdclk);
-		/* fall through */
+		fallthrough;
 	case 337500:
 		val |= LCPLL_CLK_FREQ_337_5_BDW;
 		break;
@@ -1042,7 +1042,7 @@ static void skl_set_cdclk(struct drm_i915_private *dev_priv,
 		drm_WARN_ON(&dev_priv->drm,
 			    cdclk != dev_priv->cdclk.hw.bypass);
 		drm_WARN_ON(&dev_priv->drm, vco != 0);
-		/* fall through */
+		fallthrough;
 	case 308571:
 	case 337500:
 		freq_select = CDCLK_FREQ_337_308;
@@ -1333,7 +1333,7 @@ static void icl_readout_refclk(struct drm_i915_private *dev_priv,
 	switch (dssm) {
 	default:
 		MISSING_CASE(dssm);
-		/* fall through */
+		fallthrough;
 	case ICL_DSSM_CDCLK_PLL_REFCLK_24MHz:
 		cdclk_config->ref = 24000;
 		break;
@@ -1561,7 +1561,7 @@ static void bxt_set_cdclk(struct drm_i915_private *dev_priv,
 		drm_WARN_ON(&dev_priv->drm,
 			    cdclk != dev_priv->cdclk.hw.bypass);
 		drm_WARN_ON(&dev_priv->drm, vco != 0);
-		/* fall through */
+		fallthrough;
 	case 2:
 		divider = BXT_CDCLK_CD2X_DIV_SEL_1;
 		break;
diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.c b/drivers/gpu/drm/i915/display/intel_combo_phy.c
index eccaa79cb4a9d..6968de4f34779 100644
--- a/drivers/gpu/drm/i915/display/intel_combo_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_combo_phy.c
@@ -52,7 +52,7 @@ cnl_get_procmon_ref_values(struct drm_i915_private *dev_priv, enum phy phy)
 	switch (val & (PROCESS_INFO_MASK | VOLTAGE_INFO_MASK)) {
 	default:
 		MISSING_CASE(val);
-		/* fall through */
+		fallthrough;
 	case VOLTAGE_INFO_0_85V | PROCESS_INFO_DOT_0:
 		procmon = &cnl_procmon_values[PROCMON_0_85V_DOT_0];
 		break;
@@ -320,7 +320,7 @@ void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
 			break;
 		default:
 			MISSING_CASE(lane_count);
-			/* fall-through */
+			fallthrough;
 		case 4:
 			lane_mask = PWR_UP_ALL_LANES;
 			break;
@@ -337,7 +337,7 @@ void intel_combo_phy_power_up_lanes(struct drm_i915_private *dev_priv,
 			break;
 		default:
 			MISSING_CASE(lane_count);
-			/* fall-through */
+			fallthrough;
 		case 4:
 			lane_mask = PWR_UP_ALL_LANES;
 			break;
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 2c484b55bcdf7..a49ff3a1a63ca 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -1888,7 +1888,7 @@ static void intel_ddi_get_encoder_pipes(struct intel_encoder *encoder,
 		switch (tmp & TRANS_DDI_EDP_INPUT_MASK) {
 		default:
 			MISSING_CASE(tmp & TRANS_DDI_EDP_INPUT_MASK);
-			/* fallthrough */
+			fallthrough;
 		case TRANS_DDI_EDP_INPUT_A_ON:
 		case TRANS_DDI_EDP_INPUT_A_ONOFF:
 			*pipe_mask = BIT(PIPE_A);
@@ -4268,7 +4268,7 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
 			pipe_config->hdmi_scrambling = true;
 		if (temp & TRANS_DDI_HIGH_TMDS_CHAR_RATE)
 			pipe_config->hdmi_high_tmds_clock_ratio = true;
-		/* fall through */
+		fallthrough;
 	case TRANS_DDI_MODE_SELECT_DVI:
 		pipe_config->output_types |= BIT(INTEL_OUTPUT_HDMI);
 		pipe_config->lane_count = 4;
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index b2ec3a5141cca..68325678f5ef9 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2029,12 +2029,12 @@ intel_tile_width_bytes(const struct drm_framebuffer *fb, int color_plane)
 	case I915_FORMAT_MOD_Y_TILED_CCS:
 		if (is_ccs_plane(fb, color_plane))
 			return 128;
-		/* fall through */
+		fallthrough;
 	case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS:
 	case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
 		if (is_ccs_plane(fb, color_plane))
 			return 64;
-		/* fall through */
+		fallthrough;
 	case I915_FORMAT_MOD_Y_TILED:
 		if (IS_GEN(dev_priv, 2) || HAS_128_BYTE_Y_TILING(dev_priv))
 			return 128;
@@ -2043,7 +2043,7 @@ intel_tile_width_bytes(const struct drm_framebuffer *fb, int color_plane)
 	case I915_FORMAT_MOD_Yf_TILED_CCS:
 		if (is_ccs_plane(fb, color_plane))
 			return 128;
-		/* fall through */
+		fallthrough;
 	case I915_FORMAT_MOD_Yf_TILED:
 		switch (cpp) {
 		case 1:
@@ -2185,7 +2185,7 @@ static unsigned int intel_surf_alignment(const struct drm_framebuffer *fb,
 	case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
 		if (is_semiplanar_uv_plane(fb, color_plane))
 			return intel_tile_row_size(fb, color_plane);
-		/* Fall-through */
+		fallthrough;
 	case I915_FORMAT_MOD_Y_TILED_GEN12_RC_CCS:
 		return 16 * 1024;
 	case I915_FORMAT_MOD_Y_TILED_CCS:
@@ -2194,7 +2194,7 @@ static unsigned int intel_surf_alignment(const struct drm_framebuffer *fb,
 		if (INTEL_GEN(dev_priv) >= 12 &&
 		    is_semiplanar_uv_plane(fb, color_plane))
 			return intel_tile_row_size(fb, color_plane);
-		/* Fall-through */
+		fallthrough;
 	case I915_FORMAT_MOD_Yf_TILED:
 		return 1 * 1024 * 1024;
 	default:
@@ -6211,7 +6211,7 @@ static int skl_update_scaler_plane(struct intel_crtc_state *crtc_state,
 	case DRM_FORMAT_ARGB16161616F:
 		if (INTEL_GEN(dev_priv) >= 11)
 			break;
-		/* fall through */
+		fallthrough;
 	default:
 		drm_dbg_kms(&dev_priv->drm,
 			    "[PLANE:%d:%s] FB:%d unsupported scaling format 0x%x\n",
@@ -10896,7 +10896,7 @@ static void hsw_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
 		break;
 	default:
 		MISSING_CASE(ddi_pll_sel);
-		/* fall through */
+		fallthrough;
 	case PORT_CLK_SEL_NONE:
 		return;
 	}
@@ -10956,10 +10956,10 @@ static bool hsw_get_transcoder_state(struct intel_crtc *crtc,
 			drm_WARN(dev, 1,
 				 "unknown pipe linked to transcoder %s\n",
 				 transcoder_name(panel_transcoder));
-			/* fall through */
+			fallthrough;
 		case TRANS_DDI_EDP_INPUT_A_ONOFF:
 			force_thru = true;
-			/* fall through */
+			fallthrough;
 		case TRANS_DDI_EDP_INPUT_A_ON:
 			trans_pipe = PIPE_A;
 			break;
@@ -13183,7 +13183,7 @@ static bool check_digital_port_conflicts(struct intel_atomic_state *state)
 		case INTEL_OUTPUT_DDI:
 			if (drm_WARN_ON(dev, !HAS_DDI(to_i915(dev))))
 				break;
-			/* else, fall through */
+			fallthrough;
 		case INTEL_OUTPUT_DP:
 		case INTEL_OUTPUT_HDMI:
 		case INTEL_OUTPUT_EDP:
diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
index aeb6ee395cce5..afa7a378b31d8 100644
--- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
@@ -892,7 +892,7 @@ static int hsw_ddi_wrpll_get_freq(struct drm_i915_private *dev_priv,
 			refclk = dev_priv->dpll.ref_clks.nssc;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case WRPLL_REF_PCH_SSC:
 		/*
 		 * We could calculate spread here, but our checking
@@ -2977,7 +2977,7 @@ static bool icl_calc_tbt_pll(struct intel_crtc_state *crtc_state,
 		switch (dev_priv->dpll.ref_clks.nssc) {
 		default:
 			MISSING_CASE(dev_priv->dpll.ref_clks.nssc);
-			/* fall-through */
+			fallthrough;
 		case 19200:
 			*pll_params = tgl_tbt_pll_19_2MHz_values;
 			break;
@@ -2992,7 +2992,7 @@ static bool icl_calc_tbt_pll(struct intel_crtc_state *crtc_state,
 		switch (dev_priv->dpll.ref_clks.nssc) {
 		default:
 			MISSING_CASE(dev_priv->dpll.ref_clks.nssc);
-			/* fall-through */
+			fallthrough;
 		case 19200:
 		case 38400:
 			*pll_params = icl_tbt_pll_19_2MHz_values;
@@ -3120,7 +3120,7 @@ static bool icl_mg_pll_find_divisors(int clock_khz, bool is_dp, bool use_ssc,
 			switch (div1) {
 			default:
 				MISSING_CASE(div1);
-				/* fall through */
+				fallthrough;
 			case 2:
 				hsdiv = MG_CLKTOP2_HSCLKCTL_HSDIV_RATIO_2;
 				break;
diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index bbde3b12c3113..4072d7062efd6 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -229,7 +229,7 @@ int intel_pch_panel_fitting(struct intel_crtc_state *crtc_state,
 	case DRM_MODE_SCALE_NONE:
 		WARN_ON(adjusted_mode->crtc_hdisplay != crtc_state->pipe_src_w);
 		WARN_ON(adjusted_mode->crtc_vdisplay != crtc_state->pipe_src_h);
-		/* fall through */
+		fallthrough;
 	case DRM_MODE_SCALE_FULLSCREEN:
 		x = y = 0;
 		width = adjusted_mode->crtc_hdisplay;
diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c b/drivers/gpu/drm/i915/display/intel_sdvo.c
index 2da4388e15403..5e9fb349c8292 100644
--- a/drivers/gpu/drm/i915/display/intel_sdvo.c
+++ b/drivers/gpu/drm/i915/display/intel_sdvo.c
@@ -1531,7 +1531,7 @@ static void intel_sdvo_pre_enable(struct intel_atomic_state *state,
 	default:
 		drm_WARN(&dev_priv->drm, 1,
 			 "unknown pixel multiplier specified\n");
-		/* fall through */
+		fallthrough;
 	case 1: rate = SDVO_CLOCK_RATE_MULT_1X; break;
 	case 2: rate = SDVO_CLOCK_RATE_MULT_2X; break;
 	case 4: rate = SDVO_CLOCK_RATE_MULT_4X; break;
@@ -2549,19 +2549,19 @@ intel_sdvo_guess_ddc_bus(struct intel_sdvo *sdvo)
 	switch (sdvo->controlled_output) {
 	case SDVO_OUTPUT_LVDS1:
 		mask |= SDVO_OUTPUT_LVDS1;
-		/* fall through */
+		fallthrough;
 	case SDVO_OUTPUT_LVDS0:
 		mask |= SDVO_OUTPUT_LVDS0;
-		/* fall through */
+		fallthrough;
 	case SDVO_OUTPUT_TMDS1:
 		mask |= SDVO_OUTPUT_TMDS1;
-		/* fall through */
+		fallthrough;
 	case SDVO_OUTPUT_TMDS0:
 		mask |= SDVO_OUTPUT_TMDS0;
-		/* fall through */
+		fallthrough;
 	case SDVO_OUTPUT_RGB1:
 		mask |= SDVO_OUTPUT_RGB1;
-		/* fall through */
+		fallthrough;
 	case SDVO_OUTPUT_RGB0:
 		mask |= SDVO_OUTPUT_RGB0;
 		break;
diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
index d03860fef2d79..c89f5f7ccb06e 100644
--- a/drivers/gpu/drm/i915/display/intel_sprite.c
+++ b/drivers/gpu/drm/i915/display/intel_sprite.c
@@ -2147,7 +2147,7 @@ static int skl_plane_check_fb(const struct intel_crtc_state *crtc_state,
 		case DRM_FORMAT_RGB565:
 			if (INTEL_GEN(dev_priv) >= 11)
 				break;
-			/* fall through */
+			fallthrough;
 		case DRM_FORMAT_C8:
 		case DRM_FORMAT_XRGB16161616F:
 		case DRM_FORMAT_XBGR16161616F:
@@ -2702,7 +2702,7 @@ static bool g4x_sprite_format_mod_supported(struct drm_plane *_plane,
 		if (modifier == DRM_FORMAT_MOD_LINEAR ||
 		    modifier == I915_FORMAT_MOD_X_TILED)
 			return true;
-		/* fall through */
+		fallthrough;
 	default:
 		return false;
 	}
@@ -2733,7 +2733,7 @@ static bool snb_sprite_format_mod_supported(struct drm_plane *_plane,
 		if (modifier == DRM_FORMAT_MOD_LINEAR ||
 		    modifier == I915_FORMAT_MOD_X_TILED)
 			return true;
-		/* fall through */
+		fallthrough;
 	default:
 		return false;
 	}
@@ -2768,7 +2768,7 @@ static bool vlv_sprite_format_mod_supported(struct drm_plane *_plane,
 		if (modifier == DRM_FORMAT_MOD_LINEAR ||
 		    modifier == I915_FORMAT_MOD_X_TILED)
 			return true;
-		/* fall through */
+		fallthrough;
 	default:
 		return false;
 	}
@@ -2801,7 +2801,7 @@ static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
 	case DRM_FORMAT_ABGR8888:
 		if (is_ccs_modifier(modifier))
 			return true;
-		/* fall through */
+		fallthrough;
 	case DRM_FORMAT_RGB565:
 	case DRM_FORMAT_XRGB2101010:
 	case DRM_FORMAT_XBGR2101010:
@@ -2819,7 +2819,7 @@ static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
 	case DRM_FORMAT_XVYU2101010:
 		if (modifier == I915_FORMAT_MOD_Yf_TILED)
 			return true;
-		/* fall through */
+		fallthrough;
 	case DRM_FORMAT_C8:
 	case DRM_FORMAT_XBGR16161616F:
 	case DRM_FORMAT_ABGR16161616F:
@@ -2834,7 +2834,7 @@ static bool skl_plane_format_mod_supported(struct drm_plane *_plane,
 		    modifier == I915_FORMAT_MOD_X_TILED ||
 		    modifier == I915_FORMAT_MOD_Y_TILED)
 			return true;
-		/* fall through */
+		fallthrough;
 	default:
 		return false;
 	}
@@ -2860,7 +2860,7 @@ static bool gen12_plane_format_mod_supported(struct drm_plane *_plane,
 	case I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS:
 		if (!gen12_plane_supports_mc_ccs(dev_priv, plane->id))
 			return false;
-		/* fall through */
+		fallthrough;
 	case DRM_FORMAT_MOD_LINEAR:
 	case I915_FORMAT_MOD_X_TILED:
 	case I915_FORMAT_MOD_Y_TILED:
@@ -2877,7 +2877,7 @@ static bool gen12_plane_format_mod_supported(struct drm_plane *_plane,
 	case DRM_FORMAT_ABGR8888:
 		if (is_ccs_modifier(modifier))
 			return true;
-		/* fall through */
+		fallthrough;
 	case DRM_FORMAT_YUYV:
 	case DRM_FORMAT_YVYU:
 	case DRM_FORMAT_UYVY:
@@ -2889,7 +2889,7 @@ static bool gen12_plane_format_mod_supported(struct drm_plane *_plane,
 	case DRM_FORMAT_P016:
 		if (modifier == I915_FORMAT_MOD_Y_TILED_GEN12_MC_CCS)
 			return true;
-		/* fall through */
+		fallthrough;
 	case DRM_FORMAT_RGB565:
 	case DRM_FORMAT_XRGB2101010:
 	case DRM_FORMAT_XBGR2101010:
@@ -2910,7 +2910,7 @@ static bool gen12_plane_format_mod_supported(struct drm_plane *_plane,
 		    modifier == I915_FORMAT_MOD_X_TILED ||
 		    modifier == I915_FORMAT_MOD_Y_TILED)
 			return true;
-		/* fall through */
+		fallthrough;
 	default:
 		return false;
 	}
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c
index 5b5dc86a57375..8f67aef18b2da 100644
--- a/drivers/gpu/drm/i915/display/intel_tc.c
+++ b/drivers/gpu/drm/i915/display/intel_tc.c
@@ -159,7 +159,7 @@ int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port)
 	switch (lane_mask) {
 	default:
 		MISSING_CASE(lane_mask);
-		/* fall-through */
+		fallthrough;
 	case 0x1:
 	case 0x2:
 	case 0x4:
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
index b23368529a409..753f82d87a316 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
@@ -209,7 +209,7 @@ static vm_fault_t i915_error_to_vmf_fault(int err)
 	switch (err) {
 	default:
 		WARN_ONCE(err, "unhandled error in %s: %i\n", __func__, err);
-		/* fallthrough */
+		fallthrough;
 	case -EIO: /* shmemfs failure from swap device */
 	case -EFAULT: /* purged object */
 	case -ENODEV: /* bad object, how did you get here! */
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
index 7050519c87a4f..d15ff6748a50b 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
@@ -276,7 +276,7 @@ static void *i915_gem_object_map(struct drm_i915_gem_object *obj,
 	switch (type) {
 	default:
 		MISSING_CASE(type);
-		/* fallthrough - to use PAGE_KERNEL anyway */
+		fallthrough;	/* to use PAGE_KERNEL anyway */
 	case I915_MAP_WB:
 		pgprot = PAGE_KERNEL;
 		break;
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
index e0f21f12d3ce4..0be5e86833371 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_stolen.c
@@ -249,7 +249,7 @@ static void vlv_get_stolen_reserved(struct drm_i915_private *i915,
 	switch (reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK) {
 	default:
 		MISSING_CASE(reg_val & GEN7_STOLEN_RESERVED_SIZE_MASK);
-		/* fall through */
+		fallthrough;
 	case GEN7_STOLEN_RESERVED_1M:
 		*size = 1024 * 1024;
 		break;
@@ -416,7 +416,7 @@ static int i915_gem_init_stolen(struct drm_i915_private *i915)
 	case 4:
 		if (!IS_G4X(i915))
 			break;
-		/* fall through */
+		fallthrough;
 	case 5:
 		g4x_get_stolen_reserved(i915, uncore,
 					&reserved_base, &reserved_size);
@@ -445,7 +445,7 @@ static int i915_gem_init_stolen(struct drm_i915_private *i915)
 		break;
 	default:
 		MISSING_CASE(INTEL_GEN(i915));
-		/* fall-through */
+		fallthrough;
 	case 11:
 	case 12:
 		icl_get_stolen_reserved(i915, uncore,
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_cs.c b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
index dd1a42c4d344e..26087dd797824 100644
--- a/drivers/gpu/drm/i915/gt/intel_engine_cs.c
+++ b/drivers/gpu/drm/i915/gt/intel_engine_cs.c
@@ -213,7 +213,7 @@ u32 intel_engine_context_size(struct intel_gt *gt, u8 class)
 		break;
 	default:
 		MISSING_CASE(class);
-		/* fall through */
+		fallthrough;
 	case VIDEO_DECODE_CLASS:
 	case VIDEO_ENHANCEMENT_CLASS:
 	case COPY_ENGINE_CLASS:
diff --git a/drivers/gpu/drm/i915/gt/intel_ggtt.c b/drivers/gpu/drm/i915/gt/intel_ggtt.c
index 62979ea591f05..99e28d9021e81 100644
--- a/drivers/gpu/drm/i915/gt/intel_ggtt.c
+++ b/drivers/gpu/drm/i915/gt/intel_ggtt.c
@@ -1437,7 +1437,7 @@ i915_get_ggtt_vma_pages(struct i915_vma *vma)
 	switch (vma->ggtt_view.type) {
 	default:
 		GEM_BUG_ON(vma->ggtt_view.type);
-		/* fall through */
+		fallthrough;
 	case I915_GGTT_VIEW_NORMAL:
 		vma->pages = vma->obj->mm.pages;
 		return 0;
diff --git a/drivers/gpu/drm/i915/gt/intel_ring_submission.c b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
index 94915f668715d..898593ca48898 100644
--- a/drivers/gpu/drm/i915/gt/intel_ring_submission.c
+++ b/drivers/gpu/drm/i915/gt/intel_ring_submission.c
@@ -100,7 +100,7 @@ static void set_hwsp(struct intel_engine_cs *engine, u32 offset)
 		 */
 		default:
 			GEM_BUG_ON(engine->id);
-			/* fallthrough */
+			fallthrough;
 		case RCS0:
 			hwsp = RENDER_HWS_PGA_GEN7;
 			break;
diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
index 63bba7b4bb2fb..05f3bc98d242d 100644
--- a/drivers/gpu/drm/i915/gvt/handlers.c
+++ b/drivers/gpu/drm/i915/gvt/handlers.c
@@ -1226,7 +1226,7 @@ static int handle_g2v_notification(struct intel_vgpu *vgpu, int notification)
 	switch (notification) {
 	case VGT_G2V_PPGTT_L3_PAGE_TABLE_CREATE:
 		root_entry_type = GTT_TYPE_PPGTT_ROOT_L3_ENTRY;
-		/* fall through */
+		fallthrough;
 	case VGT_G2V_PPGTT_L4_PAGE_TABLE_CREATE:
 		mm = intel_vgpu_get_ppgtt_mm(vgpu, root_entry_type, pdps);
 		return PTR_ERR_OR_ZERO(mm);
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index 6a3a2ce0b3947..3e6cbb0d1150e 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1159,7 +1159,7 @@ static void engine_record_registers(struct intel_engine_coredump *ee)
 			switch (engine->id) {
 			default:
 				MISSING_CASE(engine->id);
-				/* fall through */
+				fallthrough;
 			case RCS0:
 				mmio = RENDER_HWS_PGA_GEN7;
 				break;
diff --git a/drivers/gpu/drm/i915/i915_pmu.c b/drivers/gpu/drm/i915/i915_pmu.c
index 056994224c6bc..69c0fa20eba17 100644
--- a/drivers/gpu/drm/i915/i915_pmu.c
+++ b/drivers/gpu/drm/i915/i915_pmu.c
@@ -474,7 +474,7 @@ config_status(struct drm_i915_private *i915, u64 config)
 		if (IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915))
 			/* Requires a mutex for sampling! */
 			return -ENODEV;
-		/* Fall-through. */
+		fallthrough;
 	case I915_PMU_REQUESTED_FREQUENCY:
 		if (INTEL_GEN(i915) < 6)
 			return -ENODEV;
diff --git a/drivers/gpu/drm/imx/ipuv3-plane.c b/drivers/gpu/drm/imx/ipuv3-plane.c
index 6776ebb3246d4..8a4235d9d9f1e 100644
--- a/drivers/gpu/drm/imx/ipuv3-plane.c
+++ b/drivers/gpu/drm/imx/ipuv3-plane.c
@@ -447,7 +447,7 @@ static int ipu_plane_atomic_check(struct drm_plane *plane,
 		if (fb->pitches[1] != fb->pitches[2])
 			return -EINVAL;
 
-		/* fall-through */
+		fallthrough;
 	case DRM_FORMAT_NV12:
 	case DRM_FORMAT_NV16:
 		ubo = drm_plane_state_to_ubo(state);
diff --git a/drivers/gpu/drm/meson/meson_osd_afbcd.c b/drivers/gpu/drm/meson/meson_osd_afbcd.c
index f12e0271f1665..ffc6b584dbf85 100644
--- a/drivers/gpu/drm/meson/meson_osd_afbcd.c
+++ b/drivers/gpu/drm/meson/meson_osd_afbcd.c
@@ -205,7 +205,7 @@ static int meson_g12a_afbcd_pixel_fmt(u64 modifier, uint32_t format)
 		/* YTR is forbidden for non XBGR formats */
 		if (modifier & AFBC_FORMAT_MOD_YTR)
 			return -EINVAL;
-	/* fall through */
+		fallthrough;
 	case DRM_FORMAT_XBGR8888:
 	case DRM_FORMAT_ABGR8888:
 		return MAFBC_FMT_RGBA8888;
diff --git a/drivers/gpu/drm/meson/meson_overlay.c b/drivers/gpu/drm/meson/meson_overlay.c
index a8bcc70644dff..1ffbbecafa22b 100644
--- a/drivers/gpu/drm/meson/meson_overlay.c
+++ b/drivers/gpu/drm/meson/meson_overlay.c
@@ -654,7 +654,7 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
 			 priv->viu.vd1_addr2,
 			 priv->viu.vd1_stride2,
 			 priv->viu.vd1_height2);
-	/* fallthrough */
+		fallthrough;
 	case 2:
 		gem = drm_fb_cma_get_gem_obj(fb, 1);
 		priv->viu.vd1_addr1 = gem->paddr + fb->offsets[1];
@@ -666,7 +666,7 @@ static void meson_overlay_atomic_update(struct drm_plane *plane,
 			 priv->viu.vd1_addr1,
 			 priv->viu.vd1_stride1,
 			 priv->viu.vd1_height1);
-	/* fallthrough */
+		fallthrough;
 	case 1:
 		gem = drm_fb_cma_get_gem_obj(fb, 0);
 		priv->viu.vd1_addr0 = gem->paddr + fb->offsets[0];
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 9e63a190642cc..84a5d9c1f2a2e 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -59,7 +59,7 @@ static void a5xx_submit_in_rb(struct msm_gpu *gpu, struct msm_gem_submit *submit
 		case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 			if (priv->lastctx == ctx)
 				break;
-			/* fall-thru */
+			fallthrough;
 		case MSM_SUBMIT_CMD_BUF:
 			/* copy commands into RB: */
 			obj = submit->bos[submit->cmd[i].idx].obj;
@@ -150,7 +150,7 @@ static void a5xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 		case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 			if (priv->lastctx == ctx)
 				break;
-			/* fall-thru */
+			fallthrough;
 		case MSM_SUBMIT_CMD_BUF:
 			OUT_PKT7(ring, CP_INDIRECT_BUFFER_PFE, 3);
 			OUT_RING(ring, lower_32_bits(submit->cmd[i].iova));
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index b67b38c8fadf7..4c9bda19cbc49 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -602,7 +602,7 @@ static void a6xx_gmu_power_config(struct a6xx_gmu *gmu)
 		gmu_rmw(gmu, REG_A6XX_GMU_PWR_COL_INTER_FRAME_CTRL, 0,
 			A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_IFPC_ENABLE |
 			A6XX_GMU_PWR_COL_INTER_FRAME_CTRL_HM_POWER_COLLAPSE_ENABLE);
-		/* Fall through */
+		fallthrough;
 	case GMU_IDLE_STATE_SPTP:
 		gmu_write(gmu, REG_A6XX_GMU_PWR_COL_SPTPRAC_HYST,
 			GMU_PWR_COL_HYST);
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index c5a3e4d4c0078..3966abd523cc3 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -117,7 +117,7 @@ static void a6xx_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 		case MSM_SUBMIT_CMD_CTX_RESTORE_BUF:
 			if (priv->lastctx == ctx)
 				break;
-			/* fall-thru */
+			fallthrough;
 		case MSM_SUBMIT_CMD_BUF:
 			OUT_PKT7(ring, CP_INDIRECT_BUFFER_PFE, 3);
 			OUT_RING(ring, lower_32_bits(submit->cmd[i].iova));
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index e23641a5ec841..bb0b097901570 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -474,7 +474,7 @@ void adreno_submit(struct msm_gpu *gpu, struct msm_gem_submit *submit,
 			/* ignore if there has not been a ctx switch: */
 			if (priv->lastctx == ctx)
 				break;
-			/* fall-thru */
+			fallthrough;
 		case MSM_SUBMIT_CMD_BUF:
 			OUT_PKT3(ring, adreno_is_a4xx(adreno_gpu) ?
 				CP_INDIRECT_BUFFER_PFE : CP_INDIRECT_BUFFER_PFD, 2);
diff --git a/drivers/gpu/drm/omapdrm/dss/venc.c b/drivers/gpu/drm/omapdrm/dss/venc.c
index e0817934ee163..bd12eae0cb314 100644
--- a/drivers/gpu/drm/omapdrm/dss/venc.c
+++ b/drivers/gpu/drm/omapdrm/dss/venc.c
@@ -597,7 +597,7 @@ static void venc_bridge_mode_set(struct drm_bridge *bridge,
 	switch (venc_mode) {
 	default:
 		WARN_ON_ONCE(1);
-		/* Fall-through */
+		fallthrough;
 	case VENC_MODE_PAL:
 		venc->config = &venc_config_pal_trm;
 		break;
diff --git a/drivers/gpu/drm/radeon/ci_dpm.c b/drivers/gpu/drm/radeon/ci_dpm.c
index ba20c6f037198..886e9959496fe 100644
--- a/drivers/gpu/drm/radeon/ci_dpm.c
+++ b/drivers/gpu/drm/radeon/ci_dpm.c
@@ -4856,7 +4856,7 @@ static void ci_request_link_speed_change_before_state_change(struct radeon_devic
 			pi->force_pcie_gen = RADEON_PCIE_GEN2;
 			if (current_link_speed == RADEON_PCIE_GEN2)
 				break;
-			/* fall through */
+			fallthrough;
 		case RADEON_PCIE_GEN2:
 			if (radeon_acpi_pcie_performance_request(rdev, PCIE_PERF_REQ_PECI_GEN2, false) == 0)
 				break;
diff --git a/drivers/gpu/drm/radeon/r300.c b/drivers/gpu/drm/radeon/r300.c
index 3b7ead5be5bfe..73f67bf222e16 100644
--- a/drivers/gpu/drm/radeon/r300.c
+++ b/drivers/gpu/drm/radeon/r300.c
@@ -820,7 +820,7 @@ static int r300_packet0_check(struct radeon_cs_parser *p,
 					  ((idx_value >> 21) & 0xF));
 				return -EINVAL;
 			}
-			/* Fall through. */
+			fallthrough;
 		case 6:
 			track->cb[i].cpp = 4;
 			break;
@@ -971,7 +971,7 @@ static int r300_packet0_check(struct radeon_cs_parser *p,
 				return -EINVAL;
 			}
 			/* The same rules apply as for DXT3/5. */
-			/* Fall through. */
+			fallthrough;
 		case R300_TX_FORMAT_DXT3:
 		case R300_TX_FORMAT_DXT5:
 			track->textures[i].cpp = 1;
diff --git a/drivers/gpu/drm/radeon/r420.c b/drivers/gpu/drm/radeon/r420.c
index 1d4c04e0a4494..50b89b6d9a6ce 100644
--- a/drivers/gpu/drm/radeon/r420.c
+++ b/drivers/gpu/drm/radeon/r420.c
@@ -115,7 +115,7 @@ void r420_pipes_init(struct radeon_device *rdev)
 	default:
 		/* force to 1 pipe */
 		num_pipes = 1;
-		/* fall through */
+		fallthrough;
 	case 1:
 		tmp = (0 << 1);
 		break;
diff --git a/drivers/gpu/drm/radeon/r600_cs.c b/drivers/gpu/drm/radeon/r600_cs.c
index 49e8266461f85..390a9621604ae 100644
--- a/drivers/gpu/drm/radeon/r600_cs.c
+++ b/drivers/gpu/drm/radeon/r600_cs.c
@@ -487,7 +487,7 @@ static int r600_cs_track_validate_cb(struct radeon_cs_parser *p, int i)
 				return -EINVAL;
 			}
 		}
-		/* fall through */
+		fallthrough;
 	case V_0280A0_CLEAR_ENABLE:
 	{
 		uint32_t block_max = G_028100_CMASK_BLOCK_MAX(track->cb_color_mask[i]);
@@ -1535,7 +1535,7 @@ static int r600_check_texture_resource(struct radeon_cs_parser *p,  u32 idx,
 		break;
 	case V_038000_SQ_TEX_DIM_2D_ARRAY_MSAA:
 		is_array = true;
-		/* fall through */
+		fallthrough;
 	case V_038000_SQ_TEX_DIM_2D_MSAA:
 		array_check.nsamples = 1 << llevel;
 		llevel = 0;
diff --git a/drivers/gpu/drm/radeon/radeon_uvd.c b/drivers/gpu/drm/radeon/radeon_uvd.c
index 1ad5c3b86b640..57fb3eb3a4b45 100644
--- a/drivers/gpu/drm/radeon/radeon_uvd.c
+++ b/drivers/gpu/drm/radeon/radeon_uvd.c
@@ -454,7 +454,7 @@ static int radeon_uvd_validate_codec(struct radeon_cs_parser *p,
 		if (p->rdev->family >= CHIP_PALM)
 			return 0;
 
-		/* fall through */
+		fallthrough;
 	default:
 		DRM_ERROR("UVD codec not supported by hardware %d!\n",
 			  stream_type);
diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index a167e1c36d243..d1c73e9db889a 100644
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -5744,7 +5744,7 @@ static void si_request_link_speed_change_before_state_change(struct radeon_devic
 			si_pi->force_pcie_gen = RADEON_PCIE_GEN2;
 			if (current_link_speed == RADEON_PCIE_GEN2)
 				break;
-			/* fall through */
+			fallthrough;
 		case RADEON_PCIE_GEN2:
 			if (radeon_acpi_pcie_performance_request(rdev, PCIE_PERF_REQ_PECI_GEN2, false) == 0)
 				break;
diff --git a/drivers/gpu/drm/radeon/uvd_v1_0.c b/drivers/gpu/drm/radeon/uvd_v1_0.c
index f858d8d063476..800721153d51a 100644
--- a/drivers/gpu/drm/radeon/uvd_v1_0.c
+++ b/drivers/gpu/drm/radeon/uvd_v1_0.c
@@ -219,7 +219,7 @@ int uvd_v1_0_init(struct radeon_device *rdev)
 			WREG32(RS_DQ_RD_RET_CONF, 0x3f);
 			WREG32(MC_CONFIG, 0x1f);
 
-			/* fall through */
+			fallthrough;
 		case CHIP_RV670:
 		case CHIP_RV635:
 
diff --git a/drivers/gpu/drm/savage/savage_state.c b/drivers/gpu/drm/savage/savage_state.c
index a2ac25c11c903..e0d40ae67d542 100644
--- a/drivers/gpu/drm/savage/savage_state.c
+++ b/drivers/gpu/drm/savage/savage_state.c
@@ -306,7 +306,7 @@ static int savage_dispatch_dma_prim(drm_savage_private_t * dev_priv,
 	case SAVAGE_PRIM_TRILIST_201:
 		reorder = 1;
 		prim = SAVAGE_PRIM_TRILIST;
-		/* fall through */
+		fallthrough;
 	case SAVAGE_PRIM_TRILIST:
 		if (n % 3 != 0) {
 			DRM_ERROR("wrong number of vertices %u in TRILIST\n",
@@ -444,7 +444,7 @@ static int savage_dispatch_vb_prim(drm_savage_private_t * dev_priv,
 	case SAVAGE_PRIM_TRILIST_201:
 		reorder = 1;
 		prim = SAVAGE_PRIM_TRILIST;
-		/* fall through */
+		fallthrough;
 	case SAVAGE_PRIM_TRILIST:
 		if (n % 3 != 0) {
 			DRM_ERROR("wrong number of vertices %u in TRILIST\n",
@@ -566,7 +566,7 @@ static int savage_dispatch_dma_idx(drm_savage_private_t * dev_priv,
 	case SAVAGE_PRIM_TRILIST_201:
 		reorder = 1;
 		prim = SAVAGE_PRIM_TRILIST;
-		/* fall through */
+		fallthrough;
 	case SAVAGE_PRIM_TRILIST:
 		if (n % 3 != 0) {
 			DRM_ERROR("wrong number of indices %u in TRILIST\n", n);
@@ -705,7 +705,7 @@ static int savage_dispatch_vb_idx(drm_savage_private_t * dev_priv,
 	case SAVAGE_PRIM_TRILIST_201:
 		reorder = 1;
 		prim = SAVAGE_PRIM_TRILIST;
-		/* fall through */
+		fallthrough;
 	case SAVAGE_PRIM_TRILIST:
 		if (n % 3 != 0) {
 			DRM_ERROR("wrong number of indices %u in TRILIST\n", n);
@@ -1066,7 +1066,7 @@ int savage_bci_cmdbuf(struct drm_device *dev, void *data, struct drm_file *file_
 				ret = -EINVAL;
 				goto done;
 			}
-			/* fall through */
+			fallthrough;
 		case SAVAGE_CMD_DMA_PRIM:
 		case SAVAGE_CMD_VB_PRIM:
 			if (!first_draw_cmd)
diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
index 008f07923bbc9..38a558768e531 100644
--- a/drivers/gpu/drm/sti/sti_hdmi.c
+++ b/drivers/gpu/drm/sti/sti_hdmi.c
@@ -850,13 +850,13 @@ static int hdmi_audio_configure(struct sti_hdmi *hdmi)
 	switch (info->channels) {
 	case 8:
 		audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
-		/* fall through */
+		fallthrough;
 	case 6:
 		audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
-		/* fall through */
+		fallthrough;
 	case 4:
 		audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
-		/* fall through */
+		fallthrough;
 	case 2:
 		audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
 		break;
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index 359b56e43b83c..ced9a8287dd8b 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -195,7 +195,7 @@ void sun4i_tcon_set_status(struct sun4i_tcon *tcon,
 	switch (encoder->encoder_type) {
 	case DRM_MODE_ENCODER_LVDS:
 		is_lvds = true;
-		/* Fallthrough */
+		fallthrough;
 	case DRM_MODE_ENCODER_DSI:
 	case DRM_MODE_ENCODER_NONE:
 		channel = 0;
@@ -342,7 +342,7 @@ static void sun4i_tcon0_mode_set_dithering(struct sun4i_tcon *tcon,
 		/* R and B components are only 5 bits deep */
 		val |= SUN4I_TCON0_FRM_CTL_MODE_R;
 		val |= SUN4I_TCON0_FRM_CTL_MODE_B;
-		/* Fall through */
+		fallthrough;
 	case MEDIA_BUS_FMT_RGB666_1X18:
 	case MEDIA_BUS_FMT_RGB666_1X7X3_SPWG:
 		/* Fall through: enable dithering */
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index aa67cb037e9d1..7f13f4d715bf4 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -1027,7 +1027,7 @@ static ssize_t sun6i_dsi_transfer(struct mipi_dsi_host *host,
 			ret = sun6i_dsi_dcs_read(dsi, msg);
 			break;
 		}
-		/* Else, fall through */
+		fallthrough;
 
 	default:
 		ret = -EINVAL;
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 9a0b3240bc582..424ad60b4f388 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -135,7 +135,7 @@ static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v,
 
 		default:
 			WARN_ON_ONCE(1);
-			/* fallthrough */
+			fallthrough;
 		case 4:
 			max = 4;
 			break;
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
index 1856962411c77..518220bd092a6 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_crtc.c
@@ -386,7 +386,7 @@ static void tilcdc_crtc_set_mode(struct drm_crtc *crtc)
 		case DRM_FORMAT_XBGR8888:
 		case DRM_FORMAT_XRGB8888:
 			reg |= LCDC_V2_TFT_24BPP_UNPACK;
-			/* fallthrough */
+			fallthrough;
 		case DRM_FORMAT_BGR888:
 		case DRM_FORMAT_RGB888:
 			reg |= LCDC_V2_TFT_24BPP_MODE;
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 33526c5df0e8c..4732dcc80e119 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -525,7 +525,7 @@ int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr,
 			if (unlikely(ret != 0))
 				return ret;
 		}
-		/* fall through */
+		fallthrough;
 	case TTM_PL_TT:
 		ret = ttm_bo_vm_access_kmap(bo, offset, buf, len, write);
 		break;
diff --git a/drivers/gpu/drm/via/via_dmablit.c b/drivers/gpu/drm/via/via_dmablit.c
index 551fa31629afb..5771bb53ce6a5 100644
--- a/drivers/gpu/drm/via/via_dmablit.c
+++ b/drivers/gpu/drm/via/via_dmablit.c
@@ -179,21 +179,21 @@ via_free_sg_info(struct pci_dev *pdev, drm_via_sg_info_t *vsg)
 	switch (vsg->state) {
 	case dr_via_device_mapped:
 		via_unmap_blit_from_device(pdev, vsg);
-		/* fall through */
+		fallthrough;
 	case dr_via_desc_pages_alloc:
 		for (i = 0; i < vsg->num_desc_pages; ++i) {
 			if (vsg->desc_pages[i] != NULL)
 				free_page((unsigned long)vsg->desc_pages[i]);
 		}
 		kfree(vsg->desc_pages);
-		/* fall through */
+		fallthrough;
 	case dr_via_pages_locked:
 		unpin_user_pages_dirty_lock(vsg->pages, vsg->num_pages,
 					   (vsg->direction == DMA_FROM_DEVICE));
-		/* fall through */
+		fallthrough;
 	case dr_via_pages_alloc:
 		vfree(vsg->pages);
-		/* fall through */
+		fallthrough;
 	default:
 		vsg->state = dr_via_sg_init;
 	}
diff --git a/drivers/gpu/drm/xen/xen_drm_front.c b/drivers/gpu/drm/xen/xen_drm_front.c
index 013c9e0e412cd..cc93a8c9547bc 100644
--- a/drivers/gpu/drm/xen/xen_drm_front.c
+++ b/drivers/gpu/drm/xen/xen_drm_front.c
@@ -649,9 +649,7 @@ static void displback_changed(struct xenbus_device *xb_dev,
 
 	switch (backend_state) {
 	case XenbusStateReconfiguring:
-		/* fall through */
 	case XenbusStateReconfigured:
-		/* fall through */
 	case XenbusStateInitialised:
 		break;
 
@@ -701,7 +699,6 @@ static void displback_changed(struct xenbus_device *xb_dev,
 		break;
 
 	case XenbusStateUnknown:
-		/* fall through */
 	case XenbusStateClosed:
 		if (xb_dev->state == XenbusStateClosed)
 			break;
diff --git a/drivers/gpu/ipu-v3/ipu-dc.c b/drivers/gpu/ipu-v3/ipu-dc.c
index dbcc167219318..34b4075a6a8e5 100644
--- a/drivers/gpu/ipu-v3/ipu-dc.c
+++ b/drivers/gpu/ipu-v3/ipu-dc.c
@@ -141,7 +141,7 @@ static int ipu_bus_format_to_map(u32 fmt)
 	switch (fmt) {
 	default:
 		WARN_ON(1);
-		/* fall-through */
+		fallthrough;
 	case MEDIA_BUS_FMT_RGB888_1X24:
 		return IPU_DC_MAP_RGB24;
 	case MEDIA_BUS_FMT_RGB565_1X16:
diff --git a/drivers/hid/hid-lg-g15.c b/drivers/hid/hid-lg-g15.c
index ef0cbcd7540d5..fcaf8466e627d 100644
--- a/drivers/hid/hid-lg-g15.c
+++ b/drivers/hid/hid-lg-g15.c
@@ -680,7 +680,7 @@ static int lg_g15_register_led(struct lg_g15_data *g15, int i)
 			 * but it does have a separate power-on (reset) value.
 			 */
 			g15->leds[i].cdev.name = "g15::power_on_backlight_val";
-			/* fall through */
+			fallthrough;
 		case LG_G15_KBD_BRIGHTNESS:
 			g15->leds[i].cdev.brightness_set_blocking =
 				lg_g510_kbd_led_set;
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
index a78c13cc9f470..38ee25a813b9e 100644
--- a/drivers/hid/hid-logitech-dj.c
+++ b/drivers/hid/hid-logitech-dj.c
@@ -844,7 +844,7 @@ static void logi_dj_recv_queue_notification(struct dj_receiver_dev *djrcv_dev,
 			workitem.type = WORKITEM_TYPE_EMPTY;
 			break;
 		}
-		/* fall-through */
+		fallthrough;
 	case REPORT_TYPE_NOTIF_DEVICE_UNPAIRED:
 		workitem.quad_id_msb =
 			dj_report->report_params[DEVICE_PAIRED_PARAM_EQUAD_ID_MSB];
diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-microsoft.c
index 2d8b589201a4e..5576fed7bc153 100644
--- a/drivers/hid/hid-microsoft.c
+++ b/drivers/hid/hid-microsoft.c
@@ -163,16 +163,13 @@ static int ms_surface_dial_quirk(struct hid_input *hi, struct hid_field *field,
 {
 	switch (usage->hid & HID_USAGE_PAGE) {
 	case 0xff070000:
-		/* fall-through */
 	case HID_UP_DIGITIZER:
 		/* ignore those axis */
 		return -1;
 	case HID_UP_GENDESK:
 		switch (usage->hid) {
 		case HID_GD_X:
-			/* fall-through */
 		case HID_GD_Y:
-			/* fall-through */
 		case HID_GD_RFKILL_BTN:
 			/* ignore those axis */
 			return -1;
diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
index 8cffa84c96503..7f41213d5ae34 100644
--- a/drivers/hid/hid-rmi.c
+++ b/drivers/hid/hid-rmi.c
@@ -428,7 +428,6 @@ static void rmi_report(struct hid_device *hid, struct hid_report *report)
 
 	switch (report->id) {
 	case RMI_READ_DATA_REPORT_ID:
-		/* fall-through */
 	case RMI_ATTN_REPORT_ID:
 		return;
 	}
diff --git a/drivers/hid/hid-roccat-kone.c b/drivers/hid/hid-roccat-kone.c
index 1a6e600197d0b..2ff4c8e366ff2 100644
--- a/drivers/hid/hid-roccat-kone.c
+++ b/drivers/hid/hid-roccat-kone.c
@@ -780,7 +780,7 @@ static void kone_keep_values_up_to_date(struct kone_device *kone,
 	case kone_mouse_event_switch_profile:
 		kone->actual_dpi = kone->profiles[event->value - 1].
 				startup_dpi;
-		/* fall through */
+		fallthrough;
 	case kone_mouse_event_osd_profile:
 		kone->actual_profile = event->value;
 		break;
diff --git a/drivers/hid/hid-uclogic-params.c b/drivers/hid/hid-uclogic-params.c
index 78a364ae2f685..7d20d1fcf8d20 100644
--- a/drivers/hid/hid-uclogic-params.c
+++ b/drivers/hid/hid-uclogic-params.c
@@ -974,7 +974,7 @@ int uclogic_params_init(struct uclogic_params *params,
 			}
 			break;
 		}
-		/* FALL THROUGH */
+		fallthrough;
 	case VID_PID(USB_VENDOR_ID_HUION,
 		     USB_DEVICE_ID_HUION_TABLET):
 	case VID_PID(USB_VENDOR_ID_HUION,
diff --git a/drivers/hid/hid-wiimote-core.c b/drivers/hid/hid-wiimote-core.c
index 679e142fc850c..e484c3618deca 100644
--- a/drivers/hid/hid-wiimote-core.c
+++ b/drivers/hid/hid-wiimote-core.c
@@ -1672,7 +1672,6 @@ static ssize_t wiimote_ext_show(struct device *dev,
 	case WIIMOTE_EXT_GUITAR:
 		return sprintf(buf, "guitar\n");
 	case WIIMOTE_EXT_UNKNOWN:
-		/* fallthrough */
 	default:
 		return sprintf(buf, "unknown\n");
 	}
@@ -1722,7 +1721,6 @@ static ssize_t wiimote_dev_show(struct device *dev,
 	case WIIMOTE_DEV_PENDING:
 		return sprintf(buf, "pending\n");
 	case WIIMOTE_DEV_UNKNOWN:
-		/* fallthrough */
 	default:
 		return sprintf(buf, "unknown\n");
 	}
diff --git a/drivers/hid/usbhid/hiddev.c b/drivers/hid/usbhid/hiddev.c
index 4140dea693e90..7c0752fbfcf77 100644
--- a/drivers/hid/usbhid/hiddev.c
+++ b/drivers/hid/usbhid/hiddev.c
@@ -781,7 +781,6 @@ static long hiddev_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		break;
 
 	case HIDIOCGUCODE:
-		/* fall through */
 	case HIDIOCGUSAGE:
 	case HIDIOCSUSAGE:
 	case HIDIOCGUSAGES:
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 1c96809b51c90..83dfec327c422 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -341,7 +341,7 @@ static int wacom_graphire_irq(struct wacom_wac *wacom)
 
 			case 2: /* Mouse with wheel */
 				input_report_key(input, BTN_MIDDLE, data[1] & 0x04);
-				/* fall through */
+				fallthrough;
 
 			case 3: /* Mouse without wheel */
 				wacom->tool[0] = BTN_TOOL_MOUSE;
@@ -1201,7 +1201,7 @@ static int wacom_intuos_bt_irq(struct wacom_wac *wacom, size_t len)
 	case 0x04:
 		wacom_intuos_bt_process_data(wacom, data + i);
 		i += 10;
-		/* fall through */
+		fallthrough;
 	case 0x03:
 		wacom_intuos_bt_process_data(wacom, data + i);
 		i += 10;
@@ -2148,7 +2148,7 @@ static void wacom_wac_pad_event(struct hid_device *hdev, struct hid_field *field
 		for (i = 0; i < wacom->led.count; i++)
 			wacom_update_led(wacom, features->numbered_buttons,
 					 value, i);
-		 /* fall through*/
+		fallthrough;
 	default:
 		do_report = true;
 		break;
@@ -3602,14 +3602,14 @@ int wacom_setup_pen_input_capabilities(struct input_dev *input_dev,
 	switch (features->type) {
 	case GRAPHIRE_BT:
 		__clear_bit(ABS_MISC, input_dev->absbit);
-		/* fall through */
+		fallthrough;
 
 	case WACOM_MO:
 	case WACOM_G4:
 		input_set_abs_params(input_dev, ABS_DISTANCE, 0,
 					      features->distance_max,
 					      features->distance_fuzz, 0);
-		/* fall through */
+		fallthrough;
 
 	case GRAPHIRE:
 		input_set_capability(input_dev, EV_REL, REL_WHEEL);
@@ -3649,7 +3649,7 @@ int wacom_setup_pen_input_capabilities(struct input_dev *input_dev,
 	case INTUOS4S:
 		input_set_abs_params(input_dev, ABS_Z, -900, 899, 0, 0);
 		input_abs_set_res(input_dev, ABS_Z, 287);
-		/* fall through */
+		fallthrough;
 
 	case INTUOS:
 		wacom_setup_intuos(wacom_wac);
@@ -3682,7 +3682,7 @@ int wacom_setup_pen_input_capabilities(struct input_dev *input_dev,
 	case TABLETPC:
 	case TABLETPCE:
 		__clear_bit(ABS_MISC, input_dev->absbit);
-		/* fall through */
+		fallthrough;
 
 	case DTUS:
 	case DTUSX:
@@ -3696,7 +3696,7 @@ int wacom_setup_pen_input_capabilities(struct input_dev *input_dev,
 
 	case PTU:
 		__set_bit(BTN_STYLUS2, input_dev->keybit);
-		/* fall through */
+		fallthrough;
 
 	case PENPARTNER:
 		__set_bit(BTN_TOOL_PEN, input_dev->keybit);
@@ -3799,7 +3799,7 @@ int wacom_setup_touch_input_capabilities(struct input_dev *input_dev,
 		input_abs_set_res(input_dev, ABS_MT_POSITION_X, 40);
 		input_abs_set_res(input_dev, ABS_MT_POSITION_Y, 40);
 
-		/* fall through */
+		fallthrough;
 
 	case INTUOS5:
 	case INTUOS5L:
@@ -3817,7 +3817,7 @@ int wacom_setup_touch_input_capabilities(struct input_dev *input_dev,
 		input_set_abs_params(input_dev, ABS_MT_WIDTH_MAJOR, 0, features->x_max, 0, 0);
 		input_set_abs_params(input_dev, ABS_MT_WIDTH_MINOR, 0, features->y_max, 0, 0);
 		input_set_abs_params(input_dev, ABS_MT_ORIENTATION, 0, 1, 0, 0);
-		/* fall through */
+		fallthrough;
 
 	case WACOM_27QHDT:
 		if (wacom_wac->shared->touch->product == 0x32C ||
@@ -3826,14 +3826,14 @@ int wacom_setup_touch_input_capabilities(struct input_dev *input_dev,
 			__set_bit(SW_MUTE_DEVICE, input_dev->swbit);
 			wacom_wac->shared->has_mute_touch_switch = true;
 		}
-		/* fall through */
+		fallthrough;
 
 	case MTSCREEN:
 	case MTTPC:
 	case MTTPC_B:
 	case TABLETPC2FG:
 		input_mt_init_slots(input_dev, features->touch_max, INPUT_MT_DIRECT);
-		/*fall through */
+		fallthrough;
 
 	case TABLETPC:
 	case TABLETPCE:
@@ -3843,7 +3843,7 @@ int wacom_setup_touch_input_capabilities(struct input_dev *input_dev,
 	case INTUOSHT2:
 		input_dev->evbit[0] |= BIT_MASK(EV_SW);
 		__set_bit(SW_MUTE_DEVICE, input_dev->swbit);
-		/* fall through */
+		fallthrough;
 
 	case BAMBOO_PT:
 	case BAMBOO_TOUCH:
@@ -4099,7 +4099,7 @@ int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
 
 		__set_bit(KEY_BUTTONCONFIG, input_dev->keybit);
 		__set_bit(KEY_INFO, input_dev->keybit);
-		/* fall through */
+		fallthrough;
 
 	case WACOM_21UX2:
 	case WACOM_BEE:
@@ -4115,7 +4115,7 @@ int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
 	case INTUOS3:
 	case INTUOS3L:
 		input_set_abs_params(input_dev, ABS_RY, 0, 4096, 0, 0);
-		/* fall through */
+		fallthrough;
 
 	case INTUOS3S:
 		input_set_abs_params(input_dev, ABS_RX, 0, 4096, 0, 0);
@@ -4139,7 +4139,7 @@ int wacom_setup_pad_input_capabilities(struct input_dev *input_dev,
 		 * ID_INPUT_TABLET to be set.
 		 */
 		__set_bit(BTN_STYLUS, input_dev->keybit);
-		/* fall through */
+		fallthrough;
 
 	case INTUOS4:
 	case INTUOS4L:
diff --git a/drivers/hsi/clients/ssi_protocol.c b/drivers/hsi/clients/ssi_protocol.c
index 365b5d5967acc..96d0eccca3aa7 100644
--- a/drivers/hsi/clients/ssi_protocol.c
+++ b/drivers/hsi/clients/ssi_protocol.c
@@ -291,7 +291,7 @@ static void ssip_set_rxstate(struct ssi_protocol *ssi, unsigned int state)
 		/* CMT speech workaround */
 		if (atomic_read(&ssi->tx_usecnt))
 			break;
-		/* Else, fall through */
+		fallthrough;
 	case RECEIVING:
 		mod_timer(&ssi->keep_alive, jiffies +
 						msecs_to_jiffies(SSIP_KATOUT));
@@ -466,7 +466,7 @@ static void ssip_keep_alive(struct timer_list *t)
 		case SEND_READY:
 			if (atomic_read(&ssi->tx_usecnt) == 0)
 				break;
-			/* Fall through */
+			fallthrough;
 			/*
 			 * Workaround for cmt-speech in that case
 			 * we relay on audio timers.
@@ -668,7 +668,7 @@ static void ssip_rx_bootinforeq(struct hsi_client *cl, u32 cmd)
 	case ACTIVE:
 		dev_err(&cl->device, "Boot info req on active state\n");
 		ssip_error(cl);
-		/* Fall through */
+		fallthrough;
 	case INIT:
 	case HANDSHAKE:
 		spin_lock_bh(&ssi->lock);
diff --git a/drivers/hsi/controllers/omap_ssi_core.c b/drivers/hsi/controllers/omap_ssi_core.c
index 4bc4a201f0f6c..fa69b94debd9b 100644
--- a/drivers/hsi/controllers/omap_ssi_core.c
+++ b/drivers/hsi/controllers/omap_ssi_core.c
@@ -296,7 +296,7 @@ static int ssi_clk_event(struct notifier_block *nb, unsigned long event,
 		break;
 	case ABORT_RATE_CHANGE:
 		dev_dbg(&ssi->device, "abort rate change\n");
-		/* Fall through */
+		fallthrough;
 	case POST_RATE_CHANGE:
 		dev_dbg(&ssi->device, "post rate change (%lu -> %lu)\n",
 			clk_data->old_rate, clk_data->new_rate);
diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
index e74b144b8f3d4..754d35a25a1cc 100644
--- a/drivers/hv/hv_kvp.c
+++ b/drivers/hv/hv_kvp.c
@@ -354,7 +354,7 @@ static void process_ib_ipinfo(void *in_msg, void *out_msg, int op)
 
 		out->body.kvp_ip_val.dhcp_enabled = in->kvp_ip_val.dhcp_enabled;
 
-		/* fallthrough */
+		fallthrough;
 
 	case KVP_OP_GET_IP_INFO:
 		utf16s_to_utf8s((wchar_t *)in->kvp_ip_val.adapter_id,
diff --git a/drivers/hwmon/adt7462.c b/drivers/hwmon/adt7462.c
index 319a0519ebdb0..208813158bb40 100644
--- a/drivers/hwmon/adt7462.c
+++ b/drivers/hwmon/adt7462.c
@@ -435,7 +435,7 @@ static const char *voltage_label(struct adt7462_data *data, int which)
 		case 3:
 			return "+1.5V";
 		}
-		/* fall through */
+		fallthrough;
 	case 2:
 		if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
 			return "+12V3";
@@ -493,7 +493,7 @@ static const char *voltage_label(struct adt7462_data *data, int which)
 		case 3:
 			return "+1.5";
 		}
-		/* fall through */
+		fallthrough;
 	case 11:
 		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
 					ADT7462_PIN28_VOLT &&
@@ -531,7 +531,7 @@ static int voltage_multiplier(struct adt7462_data *data, int which)
 		case 3:
 			return 7800;
 		}
-		/* fall through */
+		fallthrough;
 	case 2:
 		if (!(data->pin_cfg[1] & ADT7462_PIN22_INPUT))
 			return 62500;
@@ -589,7 +589,7 @@ static int voltage_multiplier(struct adt7462_data *data, int which)
 		case 3:
 			return 7800;
 		}
-		/* fall through */
+		fallthrough;
 	case 11:
 	case 12:
 		if (data->pin_cfg[3] >> ADT7462_PIN28_SHIFT ==
diff --git a/drivers/hwmon/emc1403.c b/drivers/hwmon/emc1403.c
index cf0962f7a0203..e9c0bbc2caa95 100644
--- a/drivers/hwmon/emc1403.c
+++ b/drivers/hwmon/emc1403.c
@@ -406,10 +406,10 @@ static int emc1403_probe(struct i2c_client *client,
 	switch (id->driver_data) {
 	case emc1404:
 		data->groups[2] = &emc1404_group;
-		/* fall through */
+		fallthrough;
 	case emc1403:
 		data->groups[1] = &emc1403_group;
-		/* fall through */
+		fallthrough;
 	case emc1402:
 		data->groups[0] = &emc1402_group;
 	}
diff --git a/drivers/hwmon/f71882fg.c b/drivers/hwmon/f71882fg.c
index d09deb409de7a..4dec793fd07d5 100644
--- a/drivers/hwmon/f71882fg.c
+++ b/drivers/hwmon/f71882fg.c
@@ -1285,7 +1285,7 @@ static struct f71882fg_data *f71882fg_update_device(struct device *dev)
 				data->pwm_auto_point_pwm[nr][0] =
 					f71882fg_read8(data,
 						F71882FG_REG_POINT_PWM(nr, 0));
-				/* Fall through */
+				fallthrough;
 			case f71862fg:
 				data->pwm_auto_point_pwm[nr][1] =
 					f71882fg_read8(data,
@@ -2442,7 +2442,7 @@ static int f71882fg_probe(struct platform_device *pdev)
 		case f71869a:
 			/* These always have signed auto point temps */
 			data->auto_point_temp_signed = 1;
-			/* Fall through - to select correct fan/pwm reg bank! */
+			fallthrough;	/* to select correct fan/pwm reg bank! */
 		case f71889fg:
 		case f71889ed:
 		case f71889a:
diff --git a/drivers/hwmon/hwmon-vid.c b/drivers/hwmon/hwmon-vid.c
index eb72e390844ec..6d1175a518326 100644
--- a/drivers/hwmon/hwmon-vid.c
+++ b/drivers/hwmon/hwmon-vid.c
@@ -96,7 +96,7 @@ int vid_from_reg(int val, u8 vrm)
 		val &= 0x1f;
 		if (val == 0x1f)
 			return 0;
-				/* fall through */
+		fallthrough;
 	case 25:		/* AMD NPT 0Fh */
 		val &= 0x3f;
 		return (val < 32) ? 1550 - 25 * val
@@ -122,7 +122,7 @@ int vid_from_reg(int val, u8 vrm)
 
 	case 84:		/* VRM 8.4 */
 		val &= 0x0f;
-				/* fall through */
+		fallthrough;
 	case 82:		/* VRM 8.2 */
 		val &= 0x1f;
 		return val == 0x1f ? 0 :
diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c
index 7fc5b065ad8b2..81e155692aba5 100644
--- a/drivers/hwmon/ina3221.c
+++ b/drivers/hwmon/ina3221.c
@@ -352,7 +352,7 @@ static int ina3221_read_curr(struct device *dev, u32 attr,
 		if (ret)
 			return ret;
 
-		/* fall through */
+		fallthrough;
 	case hwmon_curr_crit:
 	case hwmon_curr_max:
 		if (!resistance_uo)
diff --git a/drivers/hwmon/nct6775.c b/drivers/hwmon/nct6775.c
index 750b08713dee5..5bd15622a85f9 100644
--- a/drivers/hwmon/nct6775.c
+++ b/drivers/hwmon/nct6775.c
@@ -2669,7 +2669,7 @@ static void pwm_update_registers(struct nct6775_data *data, int nr)
 	case thermal_cruise:
 		nct6775_write_value(data, data->REG_TARGET[nr],
 				    data->target_temp[nr]);
-		/* fall through  */
+		fallthrough;
 	default:
 		reg = nct6775_read_value(data, data->REG_FAN_MODE[nr]);
 		reg = (reg & ~data->tolerance_mask) |
diff --git a/drivers/hwmon/occ/common.c b/drivers/hwmon/occ/common.c
index 30e18eb60da79..a71777990d496 100644
--- a/drivers/hwmon/occ/common.c
+++ b/drivers/hwmon/occ/common.c
@@ -752,7 +752,7 @@ static int occ_setup_sensor_attrs(struct occ *occ)
 	switch (sensors->freq.version) {
 	case 2:
 		show_freq = occ_show_freq_2;
-		/* fall through */
+		fallthrough;
 	case 1:
 		num_attrs += (sensors->freq.num_sensors * 2);
 		break;
@@ -763,7 +763,7 @@ static int occ_setup_sensor_attrs(struct occ *occ)
 	switch (sensors->power.version) {
 	case 2:
 		show_power = occ_show_power_2;
-		/* fall through */
+		fallthrough;
 	case 1:
 		num_attrs += (sensors->power.num_sensors * 4);
 		break;
@@ -781,7 +781,7 @@ static int occ_setup_sensor_attrs(struct occ *occ)
 		break;
 	case 3:
 		show_caps = occ_show_caps_3;
-		/* fall through */
+		fallthrough;
 	case 2:
 		num_attrs += (sensors->caps.num_sensors * 8);
 		break;
diff --git a/drivers/hwmon/w83627hf.c b/drivers/hwmon/w83627hf.c
index e1d10a6b7f7c0..a07b97400cba3 100644
--- a/drivers/hwmon/w83627hf.c
+++ b/drivers/hwmon/w83627hf.c
@@ -1213,7 +1213,7 @@ temp_type_store(struct device *dev, struct device_attribute *devattr,
 	case W83781D_DEFAULT_BETA:
 		dev_warn(dev, "Sensor type %d is deprecated, please use 4 "
 			 "instead\n", W83781D_DEFAULT_BETA);
-		/* fall through */
+		fallthrough;
 	case 4:		/* thermistor */
 		tmp = w83627hf_read_value(data, W83781D_REG_SCFG1);
 		w83627hf_write_value(data, W83781D_REG_SCFG1,
diff --git a/drivers/hwmon/w83781d.c b/drivers/hwmon/w83781d.c
index 015f1ea319669..d833a4f16c47b 100644
--- a/drivers/hwmon/w83781d.c
+++ b/drivers/hwmon/w83781d.c
@@ -814,7 +814,7 @@ store_sensor(struct device *dev, struct device_attribute *da,
 		dev_warn(dev,
 			 "Sensor type %d is deprecated, please use 4 instead\n",
 			 W83781D_DEFAULT_BETA);
-		/* fall through */
+		fallthrough;
 	case 4:		/* thermistor */
 		tmp = w83781d_read_value(data, W83781D_REG_SCFG1);
 		w83781d_write_value(data, W83781D_REG_SCFG1,
diff --git a/drivers/hwmon/w83795.c b/drivers/hwmon/w83795.c
index 44f68b965aec3..6d52b530b429d 100644
--- a/drivers/hwmon/w83795.c
+++ b/drivers/hwmon/w83795.c
@@ -2127,7 +2127,7 @@ static void w83795_apply_temp_config(struct w83795_data *data, u8 config,
 		if (temp_chan >= 4)
 			break;
 		data->temp_mode |= 1 << temp_chan;
-		/* fall through */
+		fallthrough;
 	case 0x3: /* Thermistor */
 		data->has_temp |= 1 << temp_chan;
 		break;
diff --git a/drivers/hwtracing/coresight/coresight-cpu-debug.c b/drivers/hwtracing/coresight/coresight-cpu-debug.c
index 96544b348c273..7e642fb3ed15c 100644
--- a/drivers/hwtracing/coresight/coresight-cpu-debug.c
+++ b/drivers/hwtracing/coresight/coresight-cpu-debug.c
@@ -346,10 +346,10 @@ static void debug_init_arch_data(void *info)
 	switch (mode) {
 	case EDDEVID_IMPL_FULL:
 		drvdata->edvidsr_present = true;
-		/* Fall through */
+		fallthrough;
 	case EDDEVID_IMPL_EDPCSR_EDCIDSR:
 		drvdata->edcidsr_present = true;
-		/* Fall through */
+		fallthrough;
 	case EDDEVID_IMPL_EDPCSR:
 		/*
 		 * In ARM DDI 0487A.k, the EDDEVID1.PCSROffset is used to
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index 6d7d2169bfb26..96425e818fc20 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c
@@ -1382,7 +1382,6 @@ static int etm4_cpu_pm_notify(struct notifier_block *nb, unsigned long cmd,
 				return NOTIFY_BAD;
 		break;
 	case CPU_PM_EXIT:
-		/* fallthrough */
 	case CPU_PM_ENTER_FAILED:
 		if (drvdata->state_needs_restore)
 			etm4_cpu_restore(drvdata);
diff --git a/drivers/hwtracing/coresight/coresight-tmc.c b/drivers/hwtracing/coresight/coresight-tmc.c
index 7040d583bed9e..9ca3aaafcfbc2 100644
--- a/drivers/hwtracing/coresight/coresight-tmc.c
+++ b/drivers/hwtracing/coresight/coresight-tmc.c
@@ -84,9 +84,7 @@ u32 tmc_get_memwidth_mask(struct tmc_drvdata *drvdata)
 	 */
 	switch (drvdata->memwidth) {
 	case TMC_MEM_INTF_WIDTH_32BITS:
-	/* fallthrough */
 	case TMC_MEM_INTF_WIDTH_64BITS:
-	/* fallthrough */
 	case TMC_MEM_INTF_WIDTH_128BITS:
 		mask = GENMASK(31, 4);
 		break;
diff --git a/drivers/hwtracing/intel_th/sth.c b/drivers/hwtracing/intel_th/sth.c
index a1529f571491d..9ca8c4e045f8b 100644
--- a/drivers/hwtracing/intel_th/sth.c
+++ b/drivers/hwtracing/intel_th/sth.c
@@ -84,11 +84,11 @@ static ssize_t notrace sth_stm_packet(struct stm_data *stm_data,
 	/* Global packets (GERR, XSYNC, TRIG) are sent with register writes */
 	case STP_PACKET_GERR:
 		reg += 4;
-		/* fall through */
+		fallthrough;
 
 	case STP_PACKET_XSYNC:
 		reg += 8;
-		/* fall through */
+		fallthrough;
 
 	case STP_PACKET_TRIG:
 		if (flags & STP_PACKET_TIMESTAMPED)
diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 175c590b93b76..12ac4212aded8 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -1425,7 +1425,6 @@ omap_i2c_probe(struct platform_device *pdev)
 		major = OMAP_I2C_REV_SCHEME_0_MAJOR(omap->rev);
 		break;
 	case OMAP_I2C_SCHEME_1:
-		/* FALLTHROUGH */
 	default:
 		omap->regs = (u8 *)reg_map_ip_v2;
 		rev = (rev << 16) |
diff --git a/drivers/i2c/busses/i2c-opal.c b/drivers/i2c/busses/i2c-opal.c
index 1c4c9bb06a0bf..6eb0f50c5d287 100644
--- a/drivers/i2c/busses/i2c-opal.c
+++ b/drivers/i2c/busses/i2c-opal.c
@@ -125,7 +125,7 @@ static int i2c_opal_smbus_xfer(struct i2c_adapter *adap, u16 addr,
 	case I2C_SMBUS_BYTE:
 		req.buffer_ra = cpu_to_be64(__pa(&data->byte));
 		req.size = cpu_to_be32(1);
-		/* Fall through */
+		fallthrough;
 	case I2C_SMBUS_QUICK:
 		req.type = (read_write == I2C_SMBUS_READ) ?
 			OPAL_I2C_RAW_READ : OPAL_I2C_RAW_WRITE;
diff --git a/drivers/i3c/master/dw-i3c-master.c b/drivers/i3c/master/dw-i3c-master.c
index 5c5306cd50ec3..8513bd353c052 100644
--- a/drivers/i3c/master/dw-i3c-master.c
+++ b/drivers/i3c/master/dw-i3c-master.c
@@ -603,7 +603,7 @@ static int dw_i3c_master_bus_init(struct i3c_master_controller *m)
 		ret = dw_i2c_clk_cfg(master);
 		if (ret)
 			return ret;
-		/* fall through */
+		fallthrough;
 	case I3C_BUS_MODE_PURE:
 		ret = dw_i3c_clk_cfg(master);
 		if (ret)
diff --git a/drivers/ide/hpt366.c b/drivers/ide/hpt366.c
index fd3b5da44619b..50c9a41467c88 100644
--- a/drivers/ide/hpt366.c
+++ b/drivers/ide/hpt366.c
@@ -575,14 +575,14 @@ static u8 hpt3xx_udma_filter(ide_drive_t *drive)
 		if (!HPT370_ALLOW_ATA100_5 ||
 		    check_in_drive_list(drive, bad_ata100_5))
 			return ATA_UDMA4;
-		/* fall through */
+		fallthrough;
 	case HPT372 :
 	case HPT372A:
 	case HPT372N:
 	case HPT374 :
 		if (ata_id_is_sata(drive->id))
 			mask &= ~0x0e;
-		/* fall through */
+		fallthrough;
 	default:
 		return mask;
 	}
@@ -602,7 +602,7 @@ static u8 hpt3xx_mdma_filter(ide_drive_t *drive)
 	case HPT374 :
 		if (ata_id_is_sata(drive->id))
 			return 0x00;
-		/* fall through */
+		fallthrough;
 	default:
 		return 0x07;
 	}
diff --git a/drivers/ide/ide-cd.c b/drivers/ide/ide-cd.c
index 7f17f83039888..212bb2d8bf346 100644
--- a/drivers/ide/ide-cd.c
+++ b/drivers/ide/ide-cd.c
@@ -350,7 +350,7 @@ static int cdrom_decode_status(ide_drive_t *drive, u8 stat)
 		 */
 		if (scsi_req(rq)->cmd[0] == GPCMD_START_STOP_UNIT)
 			break;
-		/* fall-through */
+		fallthrough;
 	case DATA_PROTECT:
 		/*
 		 * No point in retrying after an illegal request or data
@@ -750,7 +750,7 @@ static ide_startstop_t cdrom_newpc_intr(ide_drive_t *drive)
 	case REQ_OP_DRV_IN:
 	case REQ_OP_DRV_OUT:
 		expiry = ide_cd_expiry;
-		/*FALLTHRU*/
+		fallthrough;
 	default:
 		timeout = ATAPI_WAIT_PC;
 		break;
diff --git a/drivers/ide/ide-floppy.c b/drivers/ide/ide-floppy.c
index 1fe1f9d37a511..af7503b47dbe3 100644
--- a/drivers/ide/ide-floppy.c
+++ b/drivers/ide/ide-floppy.c
@@ -428,7 +428,7 @@ static int ide_floppy_get_capacity(ide_drive_t *drive)
 				 * (maintains previous driver behaviour)
 				 */
 				break;
-			/* fall through */
+			fallthrough;
 		case CAPACITY_CURRENT:
 			/* Normal Zip/LS-120 disks */
 			if (memcmp(cap_desc, &floppy->cap_desc, 8))
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index e867129466b05..1ddc45a04418c 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -143,7 +143,7 @@ static void ide_classify_atapi_dev(ide_drive_t *drive)
 		}
 		/* Early cdrom models used zero */
 		type = ide_cdrom;
-		/* fall through */
+		fallthrough;
 	case ide_cdrom:
 		drive->dev_flags |= IDE_DFLAG_REMOVABLE;
 #ifdef CONFIG_PPC
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index a26f85ab58a95..d016cbe68cba1 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -129,7 +129,7 @@ ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
 			return pre_task_out_intr(drive, cmd);
 		}
 		handler = task_pio_intr;
-		/* fall through */
+		fallthrough;
 	case ATA_PROT_NODATA:
 		if (handler == NULL)
 			handler = task_no_data_intr;
@@ -141,7 +141,7 @@ ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
 		hwif->expiry = dma_ops->dma_timer_expiry;
 		ide_execute_command(drive, cmd, ide_dma_intr, 2 * WAIT_CMD);
 		dma_ops->dma_start(drive);
-		/* fall through */
+		fallthrough;
 	default:
 		return ide_started;
 	}
@@ -579,10 +579,10 @@ int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 			goto abort;
 		}
 		cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
-		/* fall through */
+		fallthrough;
 	case TASKFILE_OUT:
 		cmd.protocol = ATA_PROT_PIO;
-		/* fall through */
+		fallthrough;
 	case TASKFILE_OUT_DMAQ:
 	case TASKFILE_OUT_DMA:
 		cmd.tf_flags |= IDE_TFLAG_WRITE;
@@ -598,10 +598,10 @@ int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
 			goto abort;
 		}
 		cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
-		/* fall through */
+		fallthrough;
 	case TASKFILE_IN:
 		cmd.protocol = ATA_PROT_PIO;
-		/* fall through */
+		fallthrough;
 	case TASKFILE_IN_DMAQ:
 	case TASKFILE_IN_DMA:
 		nsect = taskin / SECTOR_SIZE;
diff --git a/drivers/ide/sis5513.c b/drivers/ide/sis5513.c
index 024bc7ba49ee5..1a700bef6c565 100644
--- a/drivers/ide/sis5513.c
+++ b/drivers/ide/sis5513.c
@@ -494,7 +494,7 @@ static int init_chipset_sis5513(struct pci_dev *dev)
 		pci_read_config_byte(dev, 0x09, &reg);
 		if ((reg & 0x0f) != 0x00)
 			pci_write_config_byte(dev, 0x09, reg&0xf0);
-		/* fall through */
+		fallthrough;
 	case ATA_16:
 		/* force per drive recovery and active timings
 		   needed on ATA_33 and below chips */
diff --git a/drivers/iio/accel/mma8452.c b/drivers/iio/accel/mma8452.c
index ba27f86731314..4e6e702500485 100644
--- a/drivers/iio/accel/mma8452.c
+++ b/drivers/iio/accel/mma8452.c
@@ -1580,7 +1580,7 @@ static int mma8452_probe(struct i2c_client *client,
 	case FXLS8471_DEVICE_ID:
 		if (ret == data->chip_info->chip_id)
 			break;
-		/* fall through */
+		fallthrough;
 	default:
 		ret = -ENODEV;
 		goto disable_regulators;
diff --git a/drivers/iio/adc/ab8500-gpadc.c b/drivers/iio/adc/ab8500-gpadc.c
index 7fdc5d2d1d35c..1bb987a4acbab 100644
--- a/drivers/iio/adc/ab8500-gpadc.c
+++ b/drivers/iio/adc/ab8500-gpadc.c
@@ -484,7 +484,7 @@ static int ab8500_gpadc_read(struct ab8500_gpadc *gpadc,
 			delay_max = 10000; /* large range optimises sleepmode */
 			break;
 		}
-		/* Fall through */
+		fallthrough;
 	default:
 		ctrl1 |= AB8500_GPADC_CTRL1_BUF_ENA;
 		break;
diff --git a/drivers/iio/adc/cpcap-adc.c b/drivers/iio/adc/cpcap-adc.c
index 84a1733e5913f..64c3cc3823110 100644
--- a/drivers/iio/adc/cpcap-adc.c
+++ b/drivers/iio/adc/cpcap-adc.c
@@ -690,7 +690,7 @@ static void cpcap_adc_phase(struct cpcap_adc_request *req)
 		break;
 	case CPCAP_ADC_BATTI_PI17:
 		index = req->bank_index;
-		/* fallthrough */
+		fallthrough;
 	default:
 		req->result += conv_tbl[index].cal_offset;
 		req->result += conv_tbl[index].align_offset;
diff --git a/drivers/iio/chemical/sps30.c b/drivers/iio/chemical/sps30.c
index 5a29e32c295fc..2ea9a5c4d8462 100644
--- a/drivers/iio/chemical/sps30.c
+++ b/drivers/iio/chemical/sps30.c
@@ -118,7 +118,7 @@ static int sps30_do_cmd(struct sps30_state *state, u16 cmd, u8 *data, int size)
 	case SPS30_READ_AUTO_CLEANING_PERIOD:
 		buf[0] = SPS30_AUTO_CLEANING_PERIOD >> 8;
 		buf[1] = (u8)(SPS30_AUTO_CLEANING_PERIOD & 0xff);
-		/* fall through */
+		fallthrough;
 	case SPS30_READ_DATA_READY_FLAG:
 	case SPS30_READ_DATA:
 	case SPS30_READ_SERIAL:
diff --git a/drivers/iio/dac/ad5592r-base.c b/drivers/iio/dac/ad5592r-base.c
index cc4875660a69f..1fd75c02a7cd7 100644
--- a/drivers/iio/dac/ad5592r-base.c
+++ b/drivers/iio/dac/ad5592r-base.c
@@ -220,7 +220,6 @@ static int ad5592r_set_channel_modes(struct ad5592r_state *st)
 			break;
 
 		case CH_MODE_UNUSED:
-			/* fall-through */
 		default:
 			switch (st->channel_offstate[i]) {
 			case CH_OFFSTATE_OUT_TRISTATE:
@@ -237,7 +236,6 @@ static int ad5592r_set_channel_modes(struct ad5592r_state *st)
 				break;
 
 			case CH_OFFSTATE_PULLDOWN:
-				/* fall-through */
 			default:
 				pulldown |= BIT(i);
 				break;
diff --git a/drivers/iio/dac/dpot-dac.c b/drivers/iio/dac/dpot-dac.c
index b3835fb6b8626..be61c3b01e8b1 100644
--- a/drivers/iio/dac/dpot-dac.c
+++ b/drivers/iio/dac/dpot-dac.c
@@ -78,7 +78,7 @@ static int dpot_dac_read_raw(struct iio_dev *indio_dev,
 			 */
 			*val2 = 1;
 			ret = IIO_VAL_FRACTIONAL;
-			/* fall through */
+			fallthrough;
 		case IIO_VAL_FRACTIONAL:
 			*val *= regulator_get_voltage(dac->vref) / 1000;
 			*val2 *= dac->max_ohms;
diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c
index 9b47d9472a4fd..d9b2ed80882a4 100644
--- a/drivers/iio/health/max30102.c
+++ b/drivers/iio/health/max30102.c
@@ -273,10 +273,10 @@ static int max30102_read_measurement(struct max30102_data *data,
 	switch (measurements) {
 	case 3:
 		MAX30102_COPY_DATA(2);
-		/* fall through */
+		fallthrough;
 	case 2:
 		MAX30102_COPY_DATA(1);
-		/* fall through */
+		fallthrough;
 	case 1:
 		MAX30102_COPY_DATA(0);
 		break;
diff --git a/drivers/iio/imu/adis.c b/drivers/iio/imu/adis.c
index c539dfa3b8d3e..319b64b2fd887 100644
--- a/drivers/iio/imu/adis.c
+++ b/drivers/iio/imu/adis.c
@@ -97,11 +97,11 @@ int __adis_write_reg(struct adis *adis, unsigned int reg,
 		adis->tx[9] = (value >> 24) & 0xff;
 		adis->tx[6] = ADIS_WRITE_REG(reg + 2);
 		adis->tx[7] = (value >> 16) & 0xff;
-		/* fall through */
+		fallthrough;
 	case 2:
 		adis->tx[4] = ADIS_WRITE_REG(reg + 1);
 		adis->tx[5] = (value >> 8) & 0xff;
-		/* fall through */
+		fallthrough;
 	case 1:
 		adis->tx[2] = ADIS_WRITE_REG(reg);
 		adis->tx[3] = value & 0xff;
@@ -191,7 +191,7 @@ int __adis_read_reg(struct adis *adis, unsigned int reg,
 		adis->tx[2] = ADIS_READ_REG(reg + 2);
 		adis->tx[3] = 0;
 		spi_message_add_tail(&xfers[1], &msg);
-		/* fall through */
+		fallthrough;
 	case 2:
 		adis->tx[4] = ADIS_READ_REG(reg);
 		adis->tx[5] = 0;
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 606d5e61c5759..cdcd16f19500a 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -599,7 +599,7 @@ static ssize_t __iio_format_value(char *buf, size_t len, unsigned int type,
 		return scnprintf(buf, len, "%d", vals[0]);
 	case IIO_VAL_INT_PLUS_MICRO_DB:
 		scale_db = true;
-		/* fall through */
+		fallthrough;
 	case IIO_VAL_INT_PLUS_MICRO:
 		if (vals[1] < 0)
 			return scnprintf(buf, len, "-%d.%06u%s", abs(vals[0]),
@@ -918,7 +918,7 @@ static ssize_t iio_write_channel_info(struct device *dev,
 			break;
 		case IIO_VAL_INT_PLUS_MICRO_DB:
 			scale_db = true;
-			/* fall through */
+			fallthrough;
 		case IIO_VAL_INT_PLUS_MICRO:
 			fract_mult = 100000;
 			break;
diff --git a/drivers/iio/light/si1145.c b/drivers/iio/light/si1145.c
index 155faaea8c72f..8f5f857c2e7d9 100644
--- a/drivers/iio/light/si1145.c
+++ b/drivers/iio/light/si1145.c
@@ -1042,7 +1042,7 @@ static int si1145_initialize(struct si1145_data *data)
 						SI1145_LED_CURRENT_45mA);
 		if (ret < 0)
 			return ret;
-		/* fallthrough */
+		fallthrough;
 	case 2:
 		ret = i2c_smbus_write_byte_data(client,
 						SI1145_REG_PS_LED21,
diff --git a/drivers/iio/magnetometer/ak8974.c b/drivers/iio/magnetometer/ak8974.c
index 6a8ae145f0c00..cbb44e401c0a9 100644
--- a/drivers/iio/magnetometer/ak8974.c
+++ b/drivers/iio/magnetometer/ak8974.c
@@ -499,7 +499,7 @@ static int ak8974_detect(struct ak8974 *ak8974)
 	switch (whoami) {
 	case AK8974_WHOAMI_VALUE_AMI306:
 		name = "ami306";
-		/* fall-through */
+		fallthrough;
 	case AK8974_WHOAMI_VALUE_AMI305:
 		ret = regmap_read(ak8974->map, AMI305_VER, &fw);
 		if (ret)
diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index dc0558b23158a..fbc28f1a8b929 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -3034,7 +3034,7 @@ static int cm_rej_handler(struct cm_work *work)
 	case IB_CM_REP_SENT:
 	case IB_CM_MRA_REP_RCVD:
 		ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
-		/* fall through */
+		fallthrough;
 	case IB_CM_REQ_RCVD:
 	case IB_CM_MRA_REQ_SENT:
 		if (IBA_GET(CM_REJ_REASON, rej_msg) == IB_CM_REJ_STALE_CONN)
@@ -3044,7 +3044,7 @@ static int cm_rej_handler(struct cm_work *work)
 		break;
 	case IB_CM_DREQ_SENT:
 		ib_cancel_mad(cm_id_priv->av.port->mad_agent, cm_id_priv->msg);
-		/* fall through */
+		fallthrough;
 	case IB_CM_REP_RCVD:
 	case IB_CM_MRA_REP_SENT:
 		cm_enter_timewait(cm_id_priv);
@@ -3058,7 +3058,7 @@ static int cm_rej_handler(struct cm_work *work)
 			cm_enter_timewait(cm_id_priv);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n",
 			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
@@ -3116,7 +3116,7 @@ int ib_send_cm_mra(struct ib_cm_id *cm_id,
 			msg_response = CM_MSG_RESPONSE_OTHER;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		pr_debug("%s: local_id %d, cm_id_priv->id.state: %d\n",
 			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
@@ -3227,7 +3227,7 @@ static int cm_mra_handler(struct cm_work *work)
 	case IB_CM_MRA_REP_RCVD:
 		atomic_long_inc(&work->port->counter_group[CM_RECV_DUPLICATES].
 				counter[CM_MRA_COUNTER]);
-		/* fall through */
+		fallthrough;
 	default:
 		pr_debug("%s local_id %d, cm_id_priv->id.state: %d\n",
 			 __func__, be32_to_cpu(cm_id_priv->id.local_id),
@@ -4214,7 +4214,7 @@ static int cm_init_qp_rts_attr(struct cm_id_private *cm_id_priv,
 				qp_attr->retry_cnt = cm_id_priv->retry_count;
 				qp_attr->rnr_retry = cm_id_priv->rnr_retry_count;
 				qp_attr->max_rd_atomic = cm_id_priv->initiator_depth;
-				/* fall through */
+				fallthrough;
 			case IB_QPT_XRC_TGT:
 				*qp_attr_mask |= IB_QP_TIMEOUT;
 				qp_attr->timeout = cm_id_priv->av.timeout;
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 26de0dab60bbb..7f0e91e92968d 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -1985,7 +1985,8 @@ static int cma_ib_handler(struct ib_cm_id *cm_id,
 		event.event = RDMA_CM_EVENT_ESTABLISHED;
 		break;
 	case IB_CM_DREQ_ERROR:
-		event.status = -ETIMEDOUT; /* fall through */
+		event.status = -ETIMEDOUT;
+		fallthrough;
 	case IB_CM_DREQ_RECEIVED:
 	case IB_CM_DREP_RECEIVED:
 		if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
diff --git a/drivers/infiniband/core/rw.c b/drivers/infiniband/core/rw.c
index 614cff89fc719..13f43ab7220b0 100644
--- a/drivers/infiniband/core/rw.c
+++ b/drivers/infiniband/core/rw.c
@@ -510,7 +510,6 @@ struct ib_send_wr *rdma_rw_ctx_wrs(struct rdma_rw_ctx *ctx, struct ib_qp *qp,
 	switch (ctx->type) {
 	case RDMA_RW_SIG_MR:
 	case RDMA_RW_MR:
-		/* fallthrough */
 		for (i = 0; i < ctx->nr_ops; i++) {
 			rdma_rw_update_lkey(&ctx->reg[i],
 				ctx->reg[i].wr.wr.opcode !=
diff --git a/drivers/infiniband/core/ucma.c b/drivers/infiniband/core/ucma.c
index d03dacaef7880..1d184ea05eba1 100644
--- a/drivers/infiniband/core/ucma.c
+++ b/drivers/infiniband/core/ucma.c
@@ -794,7 +794,7 @@ static void ucma_copy_ib_route(struct rdma_ucm_query_route_resp *resp,
 	case 2:
 		ib_copy_path_rec_to_user(&resp->ib_route[1],
 					 &route->path_rec[1]);
-		/* fall through */
+		fallthrough;
 	case 1:
 		ib_copy_path_rec_to_user(&resp->ib_route[0],
 					 &route->path_rec[0]);
@@ -820,7 +820,7 @@ static void ucma_copy_iboe_route(struct rdma_ucm_query_route_resp *resp,
 	case 2:
 		ib_copy_path_rec_to_user(&resp->ib_route[1],
 					 &route->path_rec[1]);
-		/* fall through */
+		fallthrough;
 	case 1:
 		ib_copy_path_rec_to_user(&resp->ib_route[0],
 					 &route->path_rec[0]);
diff --git a/drivers/infiniband/core/uverbs_ioctl.c b/drivers/infiniband/core/uverbs_ioctl.c
index ef04a261097fc..e47c5949013f3 100644
--- a/drivers/infiniband/core/uverbs_ioctl.c
+++ b/drivers/infiniband/core/uverbs_ioctl.c
@@ -259,7 +259,7 @@ static int uverbs_process_attr(struct bundle_priv *pbundle,
 			return -EOPNOTSUPP;
 
 		e->ptr_attr.enum_id = uattr->attr_data.enum_data.elem_id;
-	/* fall through */
+		fallthrough;
 	case UVERBS_ATTR_TYPE_PTR_IN:
 		/* Ensure that any data provided by userspace beyond the known
 		 * struct is zero. Userspace that knows how to use some future
@@ -271,7 +271,7 @@ static int uverbs_process_attr(struct bundle_priv *pbundle,
 		    !uverbs_is_attr_cleared(uattr, val_spec->u.ptr.len))
 			return -EOPNOTSUPP;
 
-	/* fall through */
+		fallthrough;
 	case UVERBS_ATTR_TYPE_PTR_OUT:
 		if (uattr->len < val_spec->u.ptr.min_len ||
 		    (!val_spec->zero_trailing &&
diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 3f18efc0c2974..5ee272d27aaad 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -2657,7 +2657,7 @@ int bnxt_re_post_send(struct ib_qp *ib_qp, const struct ib_send_wr *wr,
 			default:
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		case IB_WR_SEND_WITH_INV:
 			rc = bnxt_re_build_send_wqe(qp, wr, &wqe);
 			break;
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index 117b42349a283..d60e3dcea0876 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -1779,7 +1779,7 @@ int bnxt_qplib_post_send(struct bnxt_qplib_qp *qp,
 
 			break;
 		}
-		/* fall thru */
+		fallthrough;
 	case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_IMM:
 	case BNXT_QPLIB_SWQE_TYPE_SEND_WITH_INV:
 	{
diff --git a/drivers/infiniband/hw/cxgb4/cm.c b/drivers/infiniband/hw/cxgb4/cm.c
index 77bc02a9228ee..1f288c73ccfc2 100644
--- a/drivers/infiniband/hw/cxgb4/cm.c
+++ b/drivers/infiniband/hw/cxgb4/cm.c
@@ -2885,7 +2885,7 @@ static int peer_abort(struct c4iw_dev *dev, struct sk_buff *skb)
 	case MORIBUND:
 	case CLOSING:
 		stop_ep_timer(ep);
-		/*FALLTHROUGH*/
+		fallthrough;
 	case FPDU_MODE:
 		if (ep->com.qp && ep->com.qp->srq) {
 			srqidx = ABORT_RSS_SRQIDX_G(
@@ -3759,7 +3759,7 @@ static void active_ofld_conn_reply(struct c4iw_dev *dev, struct sk_buff *skb,
 			send_fw_act_open_req(ep, atid);
 			return;
 		}
-		/* fall through */
+		fallthrough;
 	case FW_EADDRINUSE:
 		set_bit(ACT_RETRY_INUSE, &ep->com.history);
 		if (ep->retry_count++ < ACT_OPEN_RETRY_COUNT) {
diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index ac48012c992f1..cbddb20c61216 100644
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -1165,7 +1165,7 @@ int c4iw_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
 				break;
 			}
 			fw_flags |= FW_RI_RDMA_WRITE_WITH_IMMEDIATE;
-			/*FALLTHROUGH*/
+			fallthrough;
 		case IB_WR_RDMA_WRITE:
 			fw_opcode = FW_RI_RDMA_WRITE_WR;
 			swsqe->opcode = FW_RI_RDMA_WRITE;
diff --git a/drivers/infiniband/hw/hfi1/pio_copy.c b/drivers/infiniband/hw/hfi1/pio_copy.c
index b12e4665c9ab1..4a4ec23978579 100644
--- a/drivers/infiniband/hw/hfi1/pio_copy.c
+++ b/drivers/infiniband/hw/hfi1/pio_copy.c
@@ -209,7 +209,6 @@ static inline void jcopy(u8 *dest, const u8 *src, u32 n)
 		fallthrough;
 	case 1:
 		*dest++ = *src++;
-		/* fall through */
 	}
 }
 
diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c
index fa7a5ff498c73..a3b95805c154e 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_cm.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c
@@ -2443,7 +2443,7 @@ static void i40iw_handle_rst_pkt(struct i40iw_cm_node *cm_node,
 	case I40IW_CM_STATE_FIN_WAIT1:
 	case I40IW_CM_STATE_LAST_ACK:
 		cm_node->cm_id->rem_ref(cm_node->cm_id);
-		/* fall through */
+		fallthrough;
 	case I40IW_CM_STATE_TIME_WAIT:
 		cm_node->state = I40IW_CM_STATE_CLOSED;
 		i40iw_rem_ref_cm_node(cm_node);
diff --git a/drivers/infiniband/hw/i40iw/i40iw_ctrl.c b/drivers/infiniband/hw/i40iw/i40iw_ctrl.c
index 688f196672215..86d3f8aff329c 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_ctrl.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_ctrl.c
@@ -1964,7 +1964,6 @@ static enum i40iw_status_code i40iw_sc_get_next_aeqe(struct i40iw_sc_aeq *aeq,
 		info->out_rdrsp = true;
 		break;
 	case I40IW_AE_SOURCE_RSVD:
-		/* fallthrough */
 	default:
 		break;
 	}
@@ -3762,14 +3761,14 @@ static enum i40iw_status_code cqp_sds_wqe_fill(struct i40iw_sc_cqp *cqp,
 					LS_64(1, I40IW_CQPSQ_UPESD_ENTRY_VALID)));
 
 		set_64bit_val(wqe, 56, info->entry[2].data);
-		/* fallthrough */
+		fallthrough;
 	case 2:
 		set_64bit_val(wqe, 32,
 			      (LS_64(info->entry[1].cmd, I40IW_CQPSQ_UPESD_SDCMD) |
 					LS_64(1, I40IW_CQPSQ_UPESD_ENTRY_VALID)));
 
 		set_64bit_val(wqe, 40, info->entry[1].data);
-		/* fallthrough */
+		fallthrough;
 	case 1:
 		set_64bit_val(wqe, 0,
 			      LS_64(info->entry[0].cmd, I40IW_CQPSQ_UPESD_SDCMD));
diff --git a/drivers/infiniband/hw/i40iw/i40iw_hw.c b/drivers/infiniband/hw/i40iw/i40iw_hw.c
index ae8b97c306657..e1085634b8d9d 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_hw.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_hw.c
@@ -353,7 +353,6 @@ void i40iw_process_aeq(struct i40iw_device *iwdev)
 				i40iw_cm_disconn(iwqp);
 			break;
 		case I40IW_AE_BAD_CLOSE:
-			/* fall through */
 		case I40IW_AE_RESET_SENT:
 			i40iw_next_iw_state(iwqp, I40IW_QP_STATE_ERROR, 1, 0, 0);
 			i40iw_cm_disconn(iwqp);
@@ -413,7 +412,7 @@ void i40iw_process_aeq(struct i40iw_device *iwdev)
 		case I40IW_AE_UDA_XMIT_DGRAM_TOO_LONG:
 		case I40IW_AE_UDA_XMIT_DGRAM_TOO_SHORT:
 			ctx_info->err_rq_idx_valid = false;
-			/* fall through */
+			fallthrough;
 		default:
 			if (!info->sq && ctx_info->err_rq_idx_valid) {
 				ctx_info->err_rq_idx = info->wqe_idx;
diff --git a/drivers/infiniband/hw/i40iw/i40iw_main.c b/drivers/infiniband/hw/i40iw/i40iw_main.c
index 9c96ece5e7f33..58a433135a038 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_main.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_main.c
@@ -1489,36 +1489,35 @@ static void i40iw_deinit_device(struct i40iw_device *iwdev)
 		iwdev->iw_status = 0;
 		i40iw_port_ibevent(iwdev);
 		i40iw_destroy_rdma_device(iwdev->iwibdev);
-		/* fallthrough */
+		fallthrough;
 	case IP_ADDR_REGISTERED:
 		if (!iwdev->reset)
 			i40iw_del_macip_entry(iwdev, (u8)iwdev->mac_ip_table_idx);
-		/* fallthrough */
-		/* fallthrough */
+		fallthrough;
 	case PBLE_CHUNK_MEM:
 		i40iw_destroy_pble_pool(dev, iwdev->pble_rsrc);
-		/* fallthrough */
+		fallthrough;
 	case CEQ_CREATED:
 		i40iw_dele_ceqs(iwdev);
-		/* fallthrough */
+		fallthrough;
 	case AEQ_CREATED:
 		i40iw_destroy_aeq(iwdev);
-		/* fallthrough */
+		fallthrough;
 	case IEQ_CREATED:
 		i40iw_puda_dele_resources(&iwdev->vsi, I40IW_PUDA_RSRC_TYPE_IEQ, iwdev->reset);
-		/* fallthrough */
+		fallthrough;
 	case ILQ_CREATED:
 		i40iw_puda_dele_resources(&iwdev->vsi, I40IW_PUDA_RSRC_TYPE_ILQ, iwdev->reset);
-		/* fallthrough */
+		fallthrough;
 	case CCQ_CREATED:
 		i40iw_destroy_ccq(iwdev);
-		/* fallthrough */
+		fallthrough;
 	case HMC_OBJS_CREATED:
 		i40iw_del_hmc_objects(dev, dev->hmc_info, true, iwdev->reset);
-		/* fallthrough */
+		fallthrough;
 	case CQP_CREATED:
 		i40iw_destroy_cqp(iwdev, true);
-		/* fallthrough */
+		fallthrough;
 	case INITIAL_STATE:
 		i40iw_cleanup_cm_core(&iwdev->cm_core);
 		if (iwdev->vsi.pestat) {
@@ -1528,7 +1527,6 @@ static void i40iw_deinit_device(struct i40iw_device *iwdev)
 		i40iw_del_init_mem(iwdev);
 		break;
 	case INVALID_STATE:
-		/* fallthrough */
 	default:
 		i40iw_pr_err("bad init_state = %d\n", iwdev->init_state);
 		break;
diff --git a/drivers/infiniband/hw/i40iw/i40iw_puda.c b/drivers/infiniband/hw/i40iw/i40iw_puda.c
index d9c7ae6a7030b..924be4b03c9a0 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_puda.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_puda.c
@@ -814,13 +814,13 @@ void i40iw_puda_dele_resources(struct i40iw_sc_vsi *vsi,
 	switch (rsrc->completion) {
 	case PUDA_HASH_CRC_COMPLETE:
 		i40iw_free_hash_desc(rsrc->hash_desc);
-		/* fall through */
+		fallthrough;
 	case PUDA_QP_CREATED:
 		if (!reset)
 			i40iw_puda_free_qp(rsrc);
 
 		i40iw_free_dma_mem(dev->hw, &rsrc->qpmem);
-		/* fallthrough */
+		fallthrough;
 	case PUDA_CQ_CREATED:
 		if (!reset)
 			i40iw_puda_free_cq(rsrc);
diff --git a/drivers/infiniband/hw/i40iw/i40iw_utils.c b/drivers/infiniband/hw/i40iw/i40iw_utils.c
index 016524683e17e..e07fb37af0865 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_utils.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_utils.c
@@ -190,9 +190,8 @@ int i40iw_inetaddr_event(struct notifier_block *notifier,
 	switch (event) {
 	case NETDEV_DOWN:
 		action = I40IW_ARP_DELETE;
-		/* Fall through */
+		fallthrough;
 	case NETDEV_UP:
-		/* Fall through */
 	case NETDEV_CHANGEADDR:
 
 		/* Just skip if no need to handle ARP cache */
@@ -247,9 +246,8 @@ int i40iw_inet6addr_event(struct notifier_block *notifier,
 	switch (event) {
 	case NETDEV_DOWN:
 		action = I40IW_ARP_DELETE;
-		/* Fall through */
+		fallthrough;
 	case NETDEV_UP:
-		/* Fall through */
 	case NETDEV_CHANGEADDR:
 		i40iw_manage_arp_cache(iwdev,
 				       netdev->dev_addr,
@@ -344,7 +342,7 @@ int i40iw_netdevice_event(struct notifier_block *notifier,
 	switch (event) {
 	case NETDEV_DOWN:
 		iwdev->iw_status = 0;
-		/* Fall through */
+		fallthrough;
 	case NETDEV_UP:
 		i40iw_port_ibevent(iwdev);
 		break;
diff --git a/drivers/infiniband/hw/i40iw/i40iw_verbs.c b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
index 6957e4f3404b1..b51339328a51e 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
@@ -810,7 +810,7 @@ void i40iw_hw_modify_qp(struct i40iw_device *iwdev, struct i40iw_qp *iwqp,
 	case I40IW_QP_STATE_RTS:
 		if (iwqp->iwarp_state == I40IW_QP_STATE_IDLE)
 			i40iw_send_reset(iwqp->cm_node);
-		/* fall through */
+		fallthrough;
 	case I40IW_QP_STATE_IDLE:
 	case I40IW_QP_STATE_TERMINATE:
 	case I40IW_QP_STATE_CLOSING:
@@ -2144,7 +2144,6 @@ static int i40iw_post_send(struct ib_qp *ibqp,
 
 		switch (ib_wr->opcode) {
 		case IB_WR_SEND:
-			/* fall-through */
 		case IB_WR_SEND_WITH_INV:
 			if (ib_wr->opcode == IB_WR_SEND) {
 				if (ib_wr->send_flags & IB_SEND_SOLICITED)
@@ -2201,7 +2200,7 @@ static int i40iw_post_send(struct ib_qp *ibqp,
 			break;
 		case IB_WR_RDMA_READ_WITH_INV:
 			inv_stag = true;
-			/* fall-through*/
+			fallthrough;
 		case IB_WR_RDMA_READ:
 			if (ib_wr->num_sge > I40IW_MAX_SGE_RD) {
 				err = -EINVAL;
diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index f8b936b76dcdf..8a3436994f809 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -765,13 +765,13 @@ static int mlx4_ib_poll_one(struct mlx4_ib_cq *cq,
 		switch (cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) {
 		case MLX4_OPCODE_RDMA_WRITE_IMM:
 			wc->wc_flags |= IB_WC_WITH_IMM;
-			/* fall through */
+			fallthrough;
 		case MLX4_OPCODE_RDMA_WRITE:
 			wc->opcode    = IB_WC_RDMA_WRITE;
 			break;
 		case MLX4_OPCODE_SEND_IMM:
 			wc->wc_flags |= IB_WC_WITH_IMM;
-			/* fall through */
+			fallthrough;
 		case MLX4_OPCODE_SEND:
 		case MLX4_OPCODE_SEND_INVAL:
 			wc->opcode    = IB_WC_SEND;
diff --git a/drivers/infiniband/hw/mlx4/mcg.c b/drivers/infiniband/hw/mlx4/mcg.c
index d844831179cf7..5e4ec9786081c 100644
--- a/drivers/infiniband/hw/mlx4/mcg.c
+++ b/drivers/infiniband/hw/mlx4/mcg.c
@@ -944,7 +944,7 @@ int mlx4_ib_mcg_multiplex_handler(struct ib_device *ibdev, int port,
 	switch (sa_mad->mad_hdr.method) {
 	case IB_MGMT_METHOD_SET:
 		may_create = 1;
-		/* fall through */
+		fallthrough;
 	case IB_SA_METHOD_DELETE:
 		req = kzalloc(sizeof *req, GFP_KERNEL);
 		if (!req)
diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
index f9ca6e000a814..2975f350b9fd1 100644
--- a/drivers/infiniband/hw/mlx4/qp.c
+++ b/drivers/infiniband/hw/mlx4/qp.c
@@ -1578,12 +1578,12 @@ static struct ib_qp *_mlx4_ib_create_qp(struct ib_pd *pd,
 		pd = to_mxrcd(init_attr->xrcd)->pd;
 		xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn;
 		init_attr->send_cq = to_mxrcd(init_attr->xrcd)->cq;
-		/* fall through */
+		fallthrough;
 	case IB_QPT_XRC_INI:
 		if (!(to_mdev(pd->device)->dev->caps.flags & MLX4_DEV_CAP_FLAG_XRC))
 			return ERR_PTR(-ENOSYS);
 		init_attr->recv_cq = init_attr->send_cq;
-		/* fall through */
+		fallthrough;
 	case IB_QPT_RC:
 	case IB_QPT_UC:
 	case IB_QPT_RAW_PACKET:
@@ -1592,7 +1592,7 @@ static struct ib_qp *_mlx4_ib_create_qp(struct ib_pd *pd,
 			return ERR_PTR(-ENOMEM);
 		qp->pri.vid = 0xFFFF;
 		qp->alt.vid = 0xFFFF;
-		/* fall through */
+		fallthrough;
 	case IB_QPT_UD:
 	{
 		err = create_qp_common(pd, init_attr, udata, 0, &qp);
diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index 0133ebb8d740e..dceb0eb2bed16 100644
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -121,13 +121,13 @@ static void handle_good_req(struct ib_wc *wc, struct mlx5_cqe64 *cqe,
 	switch (be32_to_cpu(cqe->sop_drop_qpn) >> 24) {
 	case MLX5_OPCODE_RDMA_WRITE_IMM:
 		wc->wc_flags |= IB_WC_WITH_IMM;
-		/* fall through */
+		fallthrough;
 	case MLX5_OPCODE_RDMA_WRITE:
 		wc->opcode    = IB_WC_RDMA_WRITE;
 		break;
 	case MLX5_OPCODE_SEND_IMM:
 		wc->wc_flags |= IB_WC_WITH_IMM;
-		/* fall through */
+		fallthrough;
 	case MLX5_OPCODE_SEND:
 	case MLX5_OPCODE_SEND_INVAL:
 		wc->opcode    = IB_WC_SEND;
diff --git a/drivers/infiniband/hw/mlx5/mad.c b/drivers/infiniband/hw/mlx5/mad.c
index 454ce5de2de71..9bb9bb058932f 100644
--- a/drivers/infiniband/hw/mlx5/mad.c
+++ b/drivers/infiniband/hw/mlx5/mad.c
@@ -250,9 +250,8 @@ int mlx5_ib_process_mad(struct ib_device *ibdev, int mad_flags, u8 port_num,
 		if (MLX5_CAP_GEN(dev->mdev, vport_counters) &&
 		    method == IB_MGMT_METHOD_GET)
 			return process_pma_cmd(dev, port_num, in, out);
-		/* fallthrough */
+		fallthrough;
 	case MLX5_IB_VENDOR_CLASS1:
-		/* fallthrough */
 	case MLX5_IB_VENDOR_CLASS2:
 	case IB_MGMT_CLASS_CONG_MGMT: {
 		if (method != IB_MGMT_METHOD_GET &&
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index fbc45a5e76c5c..d60d63221b14d 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -2872,7 +2872,7 @@ static void mlx5_ib_handle_event(struct work_struct *_work)
 		break;
 	case MLX5_EVENT_TYPE_GENERAL_EVENT:
 		handle_general_event(ibdev, work->param, &ibev);
-		/* fall through */
+		fallthrough;
 	default:
 		goto out;
 	}
diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 59fce5fac7a33..5758dbe640451 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -416,7 +416,7 @@ static int sq_overhead(struct ib_qp_init_attr *attr)
 	switch (attr->qp_type) {
 	case IB_QPT_XRC_INI:
 		size += sizeof(struct mlx5_wqe_xrc_seg);
-		/* fall through */
+		fallthrough;
 	case IB_QPT_RC:
 		size += sizeof(struct mlx5_wqe_ctrl_seg) +
 			max(sizeof(struct mlx5_wqe_atomic_seg) +
@@ -441,7 +441,7 @@ static int sq_overhead(struct ib_qp_init_attr *attr)
 		if (attr->create_flags & IB_QP_CREATE_IPOIB_UD_LSO)
 			size += sizeof(struct mlx5_wqe_eth_pad) +
 				sizeof(struct mlx5_wqe_eth_seg);
-		/* fall through */
+		fallthrough;
 	case IB_QPT_SMI:
 	case MLX5_IB_QPT_HW_GSI:
 		size += sizeof(struct mlx5_wqe_ctrl_seg) +
diff --git a/drivers/infiniband/hw/mthca/mthca_av.c b/drivers/infiniband/hw/mthca/mthca_av.c
index 0823c0bc7e73a..f051f4e06b539 100644
--- a/drivers/infiniband/hw/mthca/mthca_av.c
+++ b/drivers/infiniband/hw/mthca/mthca_av.c
@@ -115,7 +115,7 @@ static u8 ib_rate_to_memfree(u8 req_rate, u8 cur_rate)
 	switch ((cur_rate - 1) / req_rate) {
 	case 0:	 return MTHCA_RATE_MEMFREE_FULL;
 	case 1:	 return MTHCA_RATE_MEMFREE_HALF;
-	case 2:	 /* fall through */
+	case 2:
 	case 3:	 return MTHCA_RATE_MEMFREE_QUARTER;
 	default: return MTHCA_RATE_MEMFREE_EIGHTH;
 	}
diff --git a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
index 6cdbec13756af..c1751c9a0f625 100644
--- a/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
+++ b/drivers/infiniband/hw/ocrdma/ocrdma_verbs.c
@@ -2134,7 +2134,7 @@ int ocrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
 		case IB_WR_SEND_WITH_IMM:
 			hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
 			hdr->immdt = ntohl(wr->ex.imm_data);
-			/* fall through */
+			fallthrough;
 		case IB_WR_SEND:
 			hdr->cw |= (OCRDMA_SEND << OCRDMA_WQE_OPCODE_SHIFT);
 			ocrdma_build_send(qp, hdr, wr);
@@ -2148,7 +2148,7 @@ int ocrdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
 		case IB_WR_RDMA_WRITE_WITH_IMM:
 			hdr->cw |= (OCRDMA_FLAG_IMM << OCRDMA_WQE_FLAGS_SHIFT);
 			hdr->immdt = ntohl(wr->ex.imm_data);
-			/* fall through */
+			fallthrough;
 		case IB_WR_RDMA_WRITE:
 			hdr->cw |= (OCRDMA_WRITE << OCRDMA_WQE_OPCODE_SHIFT);
 			status = ocrdma_build_write(qp, hdr, wr);
diff --git a/drivers/infiniband/hw/qedr/verbs.c b/drivers/infiniband/hw/qedr/verbs.c
index 4ce4e2eef6ccd..b49bef94637e5 100644
--- a/drivers/infiniband/hw/qedr/verbs.c
+++ b/drivers/infiniband/hw/qedr/verbs.c
@@ -3528,7 +3528,7 @@ static int __qedr_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr,
 		break;
 	case IB_WR_RDMA_READ_WITH_INV:
 		SET_FIELD2(wqe->flags, RDMA_SQ_RDMA_WQE_1ST_READ_INV_FLG, 1);
-		/* fallthrough -- same is identical to RDMA READ */
+		fallthrough;	/* same is identical to RDMA READ */
 
 	case IB_WR_RDMA_READ:
 		wqe->req_type = RDMA_SQ_REQ_TYPE_RDMA_RD;
diff --git a/drivers/infiniband/hw/qib/qib_iba6120.c b/drivers/infiniband/hw/qib/qib_iba6120.c
index ca5ea734e3d04..44150be215bf2 100644
--- a/drivers/infiniband/hw/qib/qib_iba6120.c
+++ b/drivers/infiniband/hw/qib/qib_iba6120.c
@@ -2973,11 +2973,11 @@ static u32 qib_6120_iblink_state(u64 ibcs)
 		state = IB_PORT_ARMED;
 		break;
 	case IB_6120_L_STATE_ACTIVE:
-		/* fall through */
 	case IB_6120_L_STATE_ACT_DEFER:
 		state = IB_PORT_ACTIVE;
 		break;
-	default: /* fall through */
+	default:
+		fallthrough;
 	case IB_6120_L_STATE_DOWN:
 		state = IB_PORT_DOWN;
 		break;
diff --git a/drivers/infiniband/hw/qib/qib_iba7220.c b/drivers/infiniband/hw/qib/qib_iba7220.c
index ea3ddb05cbadf..0a6f26d4cb310 100644
--- a/drivers/infiniband/hw/qib/qib_iba7220.c
+++ b/drivers/infiniband/hw/qib/qib_iba7220.c
@@ -3586,11 +3586,11 @@ static u32 qib_7220_iblink_state(u64 ibcs)
 		state = IB_PORT_ARMED;
 		break;
 	case IB_7220_L_STATE_ACTIVE:
-		/* fall through */
 	case IB_7220_L_STATE_ACT_DEFER:
 		state = IB_PORT_ACTIVE;
 		break;
-	default: /* fall through */
+	default:
+		fallthrough;
 	case IB_7220_L_STATE_DOWN:
 		state = IB_PORT_DOWN;
 		break;
diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c
index 8bcbc884e5b61..a10eab89aee49 100644
--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -5508,11 +5508,11 @@ static u32 qib_7322_iblink_state(u64 ibcs)
 		state = IB_PORT_ARMED;
 		break;
 	case IB_7322_L_STATE_ACTIVE:
-		/* fall through */
 	case IB_7322_L_STATE_ACT_DEFER:
 		state = IB_PORT_ACTIVE;
 		break;
-	default: /* fall through */
+	default:
+		fallthrough;
 	case IB_7322_L_STATE_DOWN:
 		state = IB_PORT_DOWN;
 		break;
@@ -6533,7 +6533,7 @@ static int qib_init_7322_variables(struct qib_devdata *dd)
 				    "Invalid num_vls %u, using 4 VLs\n",
 				    qib_num_cfg_vls);
 			qib_num_cfg_vls = 4;
-			/* fall through */
+			fallthrough;
 		case 4:
 			ppd->vls_supported = IB_VL_VL0_3;
 			break;
diff --git a/drivers/infiniband/hw/qib/qib_mad.c b/drivers/infiniband/hw/qib/qib_mad.c
index 79bb83222e8d1..e7789e724f561 100644
--- a/drivers/infiniband/hw/qib/qib_mad.c
+++ b/drivers/infiniband/hw/qib/qib_mad.c
@@ -433,7 +433,7 @@ static int check_mkey(struct qib_ibport *ibp, struct ib_smp *smp, int mad_flags)
 			/* Bad mkey not a violation below level 2 */
 			if (ibp->rvp.mkeyprot < 2)
 				break;
-			/* fall through */
+			fallthrough;
 		case IB_MGMT_METHOD_SET:
 		case IB_MGMT_METHOD_TRAP_REPRESS:
 			if (ibp->rvp.mkey_violations != 0xFFFF)
@@ -828,7 +828,7 @@ static int subn_set_portinfo(struct ib_smp *smp, struct ib_device *ibdev,
 	case IB_PORT_NOP:
 		if (lstate == 0)
 			break;
-		/* FALLTHROUGH */
+		fallthrough;
 	case IB_PORT_DOWN:
 		if (lstate == 0)
 			lstate = QIB_IB_LINKDOWN_ONLY;
@@ -1928,7 +1928,7 @@ static int process_subn(struct ib_device *ibdev, int mad_flags,
 				ret = IB_MAD_RESULT_SUCCESS;
 				goto bail;
 			}
-			/* FALLTHROUGH */
+			fallthrough;
 		default:
 			smp->status |= IB_SMP_UNSUP_METH_ATTR;
 			ret = reply(smp);
@@ -1962,7 +1962,7 @@ static int process_subn(struct ib_device *ibdev, int mad_flags,
 				ret = IB_MAD_RESULT_SUCCESS;
 				goto bail;
 			}
-			/* FALLTHROUGH */
+			fallthrough;
 		default:
 			smp->status |= IB_SMP_UNSUP_METH_ATTR;
 			ret = reply(smp);
@@ -2322,7 +2322,7 @@ static int process_cc(struct ib_device *ibdev, int mad_flags,
 			ret = cc_get_congestion_control_table(ccp, ibdev, port);
 			goto bail;
 
-			/* FALLTHROUGH */
+			fallthrough;
 		default:
 			ccp->status |= IB_SMP_UNSUP_METH_ATTR;
 			ret = reply((struct ib_smp *) ccp);
@@ -2339,7 +2339,7 @@ static int process_cc(struct ib_device *ibdev, int mad_flags,
 			ret = cc_set_congestion_control_table(ccp, ibdev, port);
 			goto bail;
 
-			/* FALLTHROUGH */
+			fallthrough;
 		default:
 			ccp->status |= IB_SMP_UNSUP_METH_ATTR;
 			ret = reply((struct ib_smp *) ccp);
diff --git a/drivers/infiniband/hw/qib/qib_rc.c b/drivers/infiniband/hw/qib/qib_rc.c
index aaf7438258fac..3915e5b4a9bc1 100644
--- a/drivers/infiniband/hw/qib/qib_rc.c
+++ b/drivers/infiniband/hw/qib/qib_rc.c
@@ -83,7 +83,7 @@ static int qib_make_rc_ack(struct qib_ibdev *dev, struct rvt_qp *qp,
 			rvt_put_mr(e->rdma_sge.mr);
 			e->rdma_sge.mr = NULL;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(ATOMIC_ACKNOWLEDGE):
 		/*
 		 * We can increment the tail pointer now that the last
@@ -92,7 +92,7 @@ static int qib_make_rc_ack(struct qib_ibdev *dev, struct rvt_qp *qp,
 		 */
 		if (++qp->s_tail_ack_queue > QIB_MAX_RDMA_ATOMIC)
 			qp->s_tail_ack_queue = 0;
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(SEND_ONLY):
 	case OP(ACKNOWLEDGE):
 		/* Check for no next entry in the queue. */
@@ -149,7 +149,7 @@ static int qib_make_rc_ack(struct qib_ibdev *dev, struct rvt_qp *qp,
 
 	case OP(RDMA_READ_RESPONSE_FIRST):
 		qp->s_ack_state = OP(RDMA_READ_RESPONSE_MIDDLE);
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(RDMA_READ_RESPONSE_MIDDLE):
 		qp->s_cur_sge = &qp->s_ack_rdma_sge;
 		qp->s_rdma_mr = qp->s_ack_rdma_sge.sge.mr;
@@ -471,10 +471,10 @@ int qib_make_rc_req(struct rvt_qp *qp, unsigned long *flags)
 		 * See qib_restart_rc().
 		 */
 		qp->s_len = restart_sge(&qp->s_sge, wqe, qp->s_psn, pmtu);
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(SEND_FIRST):
 		qp->s_state = OP(SEND_MIDDLE);
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(SEND_MIDDLE):
 		bth2 = qp->s_psn++ & QIB_PSN_MASK;
 		ss = &qp->s_sge;
@@ -510,10 +510,10 @@ int qib_make_rc_req(struct rvt_qp *qp, unsigned long *flags)
 		 * See qib_restart_rc().
 		 */
 		qp->s_len = restart_sge(&qp->s_sge, wqe, qp->s_psn, pmtu);
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(RDMA_WRITE_FIRST):
 		qp->s_state = OP(RDMA_WRITE_MIDDLE);
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(RDMA_WRITE_MIDDLE):
 		bth2 = qp->s_psn++ & QIB_PSN_MASK;
 		ss = &qp->s_sge;
@@ -1807,7 +1807,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
 		if (!ret)
 			goto rnr_nak;
 		qp->r_rcv_len = 0;
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(SEND_MIDDLE):
 	case OP(RDMA_WRITE_MIDDLE):
 send_middle:
@@ -1839,7 +1839,7 @@ void qib_rc_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
 		qp->r_rcv_len = 0;
 		if (opcode == OP(SEND_ONLY))
 			goto no_immediate_data;
-		/* fall through -- for SEND_ONLY_WITH_IMMEDIATE */
+		fallthrough;	/* for SEND_ONLY_WITH_IMMEDIATE */
 	case OP(SEND_LAST_WITH_IMMEDIATE):
 send_last_imm:
 		wc.ex.imm_data = ohdr->u.imm_data;
diff --git a/drivers/infiniband/hw/qib/qib_sdma.c b/drivers/infiniband/hw/qib/qib_sdma.c
index 99e11c347130e..8f8d617366568 100644
--- a/drivers/infiniband/hw/qib/qib_sdma.c
+++ b/drivers/infiniband/hw/qib/qib_sdma.c
@@ -763,7 +763,7 @@ void __qib_sdma_process_event(struct qib_pportdata *ppd,
 			 * bringing the link up with traffic active on
 			 * 7220, e.g. */
 			ss->go_s99_running = 1;
-			/* fall through -- and start dma engine */
+			fallthrough;	/* and start dma engine */
 		case qib_sdma_event_e10_go_hw_start:
 			/* This reference means the state machine is started */
 			sdma_get(&ppd->sdma_state);
diff --git a/drivers/infiniband/hw/qib/qib_uc.c b/drivers/infiniband/hw/qib/qib_uc.c
index e17b91e2c22a9..554af4273a131 100644
--- a/drivers/infiniband/hw/qib/qib_uc.c
+++ b/drivers/infiniband/hw/qib/qib_uc.c
@@ -161,7 +161,7 @@ int qib_make_uc_req(struct rvt_qp *qp, unsigned long *flags)
 
 	case OP(SEND_FIRST):
 		qp->s_state = OP(SEND_MIDDLE);
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(SEND_MIDDLE):
 		len = qp->s_len;
 		if (len > pmtu) {
@@ -185,7 +185,7 @@ int qib_make_uc_req(struct rvt_qp *qp, unsigned long *flags)
 
 	case OP(RDMA_WRITE_FIRST):
 		qp->s_state = OP(RDMA_WRITE_MIDDLE);
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(RDMA_WRITE_MIDDLE):
 		len = qp->s_len;
 		if (len > pmtu) {
@@ -351,7 +351,7 @@ void qib_uc_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
 			goto no_immediate_data;
 		else if (opcode == OP(SEND_ONLY_WITH_IMMEDIATE))
 			goto send_last_imm;
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(SEND_MIDDLE):
 		/* Check for invalid length PMTU or posted rwqe len. */
 		if (unlikely(tlen != (hdrsize + pmtu + 4)))
@@ -440,7 +440,7 @@ void qib_uc_rcv(struct qib_ibport *ibp, struct ib_header *hdr,
 			wc.ex.imm_data = ohdr->u.rc.imm_data;
 			goto rdma_last_imm;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case OP(RDMA_WRITE_MIDDLE):
 		/* Check for invalid length PMTU or posted rwqe len. */
 		if (unlikely(tlen != (hdrsize + pmtu + 4)))
diff --git a/drivers/infiniband/hw/qib/qib_verbs.c b/drivers/infiniband/hw/qib/qib_verbs.c
index 7acf9ba5358a4..f6c01bad5a74f 100644
--- a/drivers/infiniband/hw/qib/qib_verbs.c
+++ b/drivers/infiniband/hw/qib/qib_verbs.c
@@ -237,7 +237,7 @@ static void qib_qp_rcv(struct qib_ctxtdata *rcd, struct ib_header *hdr,
 	case IB_QPT_GSI:
 		if (ib_qib_disable_sma)
 			break;
-		/* FALLTHROUGH */
+		fallthrough;
 	case IB_QPT_UD:
 		qib_ud_rcv(ibp, hdr, has_grh, data, tlen, qp);
 		break;
diff --git a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c
index afcc2abcf55c0..9a8f2a9507be0 100644
--- a/drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c
+++ b/drivers/infiniband/hw/vmw_pvrdma/pvrdma_qp.c
@@ -238,7 +238,7 @@ struct ib_qp *pvrdma_create_qp(struct ib_pd *pd,
 			ret = -EINVAL;
 			goto err_qp;
 		}
-		/* fall through */
+		fallthrough;
 	case IB_QPT_RC:
 	case IB_QPT_UD:
 		qp = kzalloc(sizeof(*qp), GFP_KERNEL);
diff --git a/drivers/infiniband/sw/rdmavt/qp.c b/drivers/infiniband/sw/rdmavt/qp.c
index 332a8ba94b81b..ee48befc89786 100644
--- a/drivers/infiniband/sw/rdmavt/qp.c
+++ b/drivers/infiniband/sw/rdmavt/qp.c
@@ -1111,7 +1111,7 @@ struct ib_qp *rvt_create_qp(struct ib_pd *ibpd,
 		if (init_attr->port_num == 0 ||
 		    init_attr->port_num > ibpd->device->phys_port_cnt)
 			return ERR_PTR(-EINVAL);
-		/* fall through */
+		fallthrough;
 	case IB_QPT_UC:
 	case IB_QPT_RC:
 	case IB_QPT_UD:
diff --git a/drivers/infiniband/sw/rxe/rxe_comp.c b/drivers/infiniband/sw/rxe/rxe_comp.c
index 4bc88708b3558..7b4df0028388c 100644
--- a/drivers/infiniband/sw/rxe/rxe_comp.c
+++ b/drivers/infiniband/sw/rxe/rxe_comp.c
@@ -282,7 +282,7 @@ static inline enum comp_state check_ack(struct rxe_qp *qp,
 		if ((syn & AETH_TYPE_MASK) != AETH_ACK)
 			return COMPST_ERROR;
 
-		/* fall through */
+		fallthrough;
 		/* (IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE doesn't have an AETH)
 		 */
 	case IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE:
diff --git a/drivers/infiniband/sw/rxe/rxe_task.c b/drivers/infiniband/sw/rxe/rxe_task.c
index 08f05ac5f5d52..ecdac3f8fcc9f 100644
--- a/drivers/infiniband/sw/rxe/rxe_task.c
+++ b/drivers/infiniband/sw/rxe/rxe_task.c
@@ -71,7 +71,7 @@ void rxe_do_task(unsigned long data)
 
 	case TASK_STATE_BUSY:
 		task->state = TASK_STATE_ARMED;
-		/* fall through */
+		fallthrough;
 	case TASK_STATE_ARMED:
 		spin_unlock_irqrestore(&task->state_lock, flags);
 		return;
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index bb61e534e4682..658939e5c34a2 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -540,7 +540,7 @@ static void init_send_wr(struct rxe_qp *qp, struct rxe_send_wr *wr,
 		switch (wr->opcode) {
 		case IB_WR_RDMA_WRITE_WITH_IMM:
 			wr->ex.imm_data = ibwr->ex.imm_data;
-			/* fall through */
+			fallthrough;
 		case IB_WR_RDMA_READ:
 		case IB_WR_RDMA_WRITE:
 			wr->wr.rdma.remote_addr = rdma_wr(ibwr)->remote_addr;
diff --git a/drivers/infiniband/sw/siw/siw_cm.c b/drivers/infiniband/sw/siw/siw_cm.c
index 1662216be66df..66764f7ef072a 100644
--- a/drivers/infiniband/sw/siw/siw_cm.c
+++ b/drivers/infiniband/sw/siw/siw_cm.c
@@ -1224,12 +1224,10 @@ static void siw_cm_llp_data_ready(struct sock *sk)
 
 	switch (cep->state) {
 	case SIW_EPSTATE_RDMA_MODE:
-		/* fall through */
 	case SIW_EPSTATE_LISTENING:
 		break;
 
 	case SIW_EPSTATE_AWAIT_MPAREQ:
-		/* fall through */
 	case SIW_EPSTATE_AWAIT_MPAREP:
 		siw_cm_queue_work(cep, SIW_CM_WORK_READ_MPAHDR);
 		break;
diff --git a/drivers/infiniband/sw/siw/siw_qp_rx.c b/drivers/infiniband/sw/siw/siw_qp_rx.c
index 857be5a7d0bdd..4bd1f1f84057b 100644
--- a/drivers/infiniband/sw/siw/siw_qp_rx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_rx.c
@@ -1215,7 +1215,7 @@ static int siw_rdmap_complete(struct siw_qp *qp, int error)
 	case RDMAP_SEND_SE:
 	case RDMAP_SEND_SE_INVAL:
 		wqe->rqe.flags |= SIW_WQE_SOLICITED;
-		/* Fall through */
+		fallthrough;
 
 	case RDMAP_SEND:
 	case RDMAP_SEND_INVAL:
@@ -1386,7 +1386,7 @@ int siw_tcp_rx_data(read_descriptor_t *rd_desc, struct sk_buff *skb,
 			 * DDP segment.
 			 */
 			qp->rx_fpdu->first_ddp_seg = 0;
-			/* Fall through */
+			fallthrough;
 
 		case SIW_GET_DATA_START:
 			/*
diff --git a/drivers/infiniband/sw/siw/siw_qp_tx.c b/drivers/infiniband/sw/siw/siw_qp_tx.c
index 9f53aa4feb878..d19d8325588b5 100644
--- a/drivers/infiniband/sw/siw/siw_qp_tx.c
+++ b/drivers/infiniband/sw/siw/siw_qp_tx.c
@@ -1042,7 +1042,7 @@ int siw_qp_sq_process(struct siw_qp *qp)
 		case SIW_OP_SEND_REMOTE_INV:
 		case SIW_OP_WRITE:
 			siw_wqe_put_mem(wqe, tx_type);
-			/* Fall through */
+			fallthrough;
 
 		case SIW_OP_INVAL_STAG:
 		case SIW_OP_REG_MR:
@@ -1128,7 +1128,7 @@ int siw_qp_sq_process(struct siw_qp *qp)
 		case SIW_OP_READ:
 		case SIW_OP_READ_LOCAL_INV:
 			siw_wqe_put_mem(wqe, tx_type);
-			/* Fall through */
+			fallthrough;
 
 		case SIW_OP_INVAL_STAG:
 		case SIW_OP_REG_MR:
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_cm.c b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
index 9bf0fa30df28c..7c41fb040f7c6 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_cm.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_cm.c
@@ -512,13 +512,13 @@ static int ipoib_cm_rx_handler(struct ib_cm_id *cm_id,
 		return ipoib_cm_req_handler(cm_id, event);
 	case IB_CM_DREQ_RECEIVED:
 		ib_send_cm_drep(cm_id, NULL, 0);
-		/* Fall through */
+		fallthrough;
 	case IB_CM_REJ_RECEIVED:
 		p = cm_id->context;
 		priv = ipoib_priv(p->dev);
 		if (ib_modify_qp(p->qp, &ipoib_cm_err_attr, IB_QP_STATE))
 			ipoib_warn(priv, "unable to move qp to error state\n");
-		/* Fall through */
+		fallthrough;
 	default:
 		return 0;
 	}
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_main.c b/drivers/infiniband/ulp/ipoib/ipoib_main.c
index 752581a8627bd..ab75b7f745d41 100644
--- a/drivers/infiniband/ulp/ipoib/ipoib_main.c
+++ b/drivers/infiniband/ulp/ipoib/ipoib_main.c
@@ -502,7 +502,7 @@ static struct net_device *ipoib_get_net_dev_by_params(
 	default:
 		dev_warn_ratelimited(&dev->dev,
 				     "duplicate IP address detected\n");
-		/* Fall through */
+		fallthrough;
 	case 1:
 		return net_dev;
 	}
diff --git a/drivers/infiniband/ulp/iser/iser_verbs.c b/drivers/infiniband/ulp/iser/iser_verbs.c
index 699e075ae1b36..2f3ebc0a75d92 100644
--- a/drivers/infiniband/ulp/iser/iser_verbs.c
+++ b/drivers/infiniband/ulp/iser/iser_verbs.c
@@ -711,7 +711,7 @@ static int iser_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *eve
 	case RDMA_CM_EVENT_REJECTED:
 		iser_info("Connection rejected: %s\n",
 			 rdma_reject_msg(cma_id, event->status));
-		/* FALLTHROUGH */
+		fallthrough;
 	case RDMA_CM_EVENT_ADDR_ERROR:
 	case RDMA_CM_EVENT_ROUTE_ERROR:
 	case RDMA_CM_EVENT_CONNECT_ERROR:
diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index 61e2f7fc513d0..e86acda3cf8c5 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -664,8 +664,8 @@ isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
 	case RDMA_CM_EVENT_ESTABLISHED:
 		isert_connected_handler(cma_id);
 		break;
-	case RDMA_CM_EVENT_ADDR_CHANGE:    /* FALLTHRU */
-	case RDMA_CM_EVENT_DISCONNECTED:   /* FALLTHRU */
+	case RDMA_CM_EVENT_ADDR_CHANGE:
+	case RDMA_CM_EVENT_DISCONNECTED:
 	case RDMA_CM_EVENT_TIMEWAIT_EXIT:  /* FALLTHRU */
 		ret = isert_disconnected_handler(cma_id, event->event);
 		break;
@@ -684,7 +684,7 @@ isert_cma_handler(struct rdma_cm_id *cma_id, struct rdma_cm_event *event)
 	case RDMA_CM_EVENT_REJECTED:
 		isert_info("Connection rejected: %s\n",
 			   rdma_reject_msg(cma_id, event->status));
-		/* fall through */
+		fallthrough;
 	case RDMA_CM_EVENT_UNREACHABLE:
 	case RDMA_CM_EVENT_CONNECT_ERROR:
 		ret = isert_connect_error(cma_id);
@@ -1470,7 +1470,7 @@ isert_put_cmd(struct isert_cmd *isert_cmd, bool comp_err)
 			transport_generic_free_cmd(&cmd->se_cmd, 0);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		iscsit_release_cmd(cmd);
 		break;
@@ -1648,7 +1648,7 @@ isert_do_control_comp(struct work_struct *work)
 	switch (cmd->i_state) {
 	case ISTATE_SEND_TASKMGTRSP:
 		iscsit_tmr_post_handler(cmd, cmd->conn);
-		/* fall through */
+		fallthrough;
 	case ISTATE_SEND_REJECT:
 	case ISTATE_SEND_TEXTRSP:
 		cmd->i_state = ISTATE_SENT_STATUS;
diff --git a/drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c b/drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c
index 874a8eb7638c2..4933085a864a2 100644
--- a/drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c
+++ b/drivers/infiniband/ulp/opa_vnic/opa_vnic_vema.c
@@ -547,7 +547,6 @@ static void vema_get(struct opa_vnic_vema_port *port,
 		vema_get_mac_entries(port, recvd_mad, rsp_mad);
 		break;
 	case OPA_EM_ATTR_IFACE_UCAST_MACS:
-		/* fall through */
 	case OPA_EM_ATTR_IFACE_MCAST_MACS:
 		vema_get_mac_list(port, recvd_mad, rsp_mad, attr_id);
 		break;
diff --git a/drivers/input/joystick/fsia6b.c b/drivers/input/joystick/fsia6b.c
index e78c4c7689909..76ffdec5c183f 100644
--- a/drivers/input/joystick/fsia6b.c
+++ b/drivers/input/joystick/fsia6b.c
@@ -102,12 +102,12 @@ static irqreturn_t fsia6b_serio_irq(struct serio *serio,
 					input_report_key(fsia6b->dev,
 							 sw_id++,
 							 sw_state == 0);
-					/* fall-through */
+					fallthrough;
 				case '2':
 					input_report_key(fsia6b->dev,
 							 sw_id++,
 							 sw_state == 1);
-					/* fall-through */
+					fallthrough;
 				case '1':
 					input_report_key(fsia6b->dev,
 							 sw_id++,
diff --git a/drivers/input/joystick/gamecon.c b/drivers/input/joystick/gamecon.c
index 88df68cc4ac65..d37645e496ff1 100644
--- a/drivers/input/joystick/gamecon.c
+++ b/drivers/input/joystick/gamecon.c
@@ -885,7 +885,6 @@ static int gc_setup_pad(struct gc *gc, int idx, int pad_type)
 
 	case GC_MULTI:
 		input_set_capability(input_dev, EV_KEY, BTN_TRIGGER);
-		/* fall through */
 		break;
 
 	case GC_PSX:
diff --git a/drivers/input/tablet/wacom_serial4.c b/drivers/input/tablet/wacom_serial4.c
index 959c1d82aa662..1cedb45ba4970 100644
--- a/drivers/input/tablet/wacom_serial4.c
+++ b/drivers/input/tablet/wacom_serial4.c
@@ -213,7 +213,7 @@ static void wacom_handle_model_response(struct wacom *wacom)
 		case 0x3731: /* PL-710 */
 			wacom->res_x = 2540;
 			wacom->res_y = 2540;
-			/* fall through */
+			fallthrough;
 		case 0x3535: /* PL-550 */
 		case 0x3830: /* PL-800 */
 			wacom->extra_z_bits = 2;
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 6b71b0aff1152..98f17fa3a8926 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -477,7 +477,7 @@ static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry)
 			bootloader = appmode - 0x24;
 			break;
 		}
-		/* Fall through - for normal case */
+		fallthrough;	/* for normal case */
 	case 0x4c:
 	case 0x4d:
 	case 0x5a:
diff --git a/drivers/input/touchscreen/wm831x-ts.c b/drivers/input/touchscreen/wm831x-ts.c
index 607d1aeb595d7..bb1699e0d3c78 100644
--- a/drivers/input/touchscreen/wm831x-ts.c
+++ b/drivers/input/touchscreen/wm831x-ts.c
@@ -290,7 +290,7 @@ static int wm831x_ts_probe(struct platform_device *pdev)
 		default:
 			dev_err(&pdev->dev, "Unsupported ISEL setting: %d\n",
 				pdata->isel);
-			/* Fall through */
+			fallthrough;
 		case 200:
 		case 0:
 			wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2,
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 958050c213f98..c652f16eb702a 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -2258,7 +2258,7 @@ static void iommu_enable_ga(struct amd_iommu *iommu)
 	switch (amd_iommu_guest_ir) {
 	case AMD_IOMMU_GUEST_IR_VAPIC:
 		iommu_feature_enable(iommu, CONTROL_GAM_EN);
-		/* Fall through */
+		fallthrough;
 	case AMD_IOMMU_GUEST_IR_LEGACY_GA:
 		iommu_feature_enable(iommu, CONTROL_GA_EN);
 		iommu->irte_ops = &irte_128_ops;
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 7196207be7eab..c192544e874b1 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -903,7 +903,7 @@ static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent)
 		break;
 	case CMDQ_OP_CFGI_CD:
 		cmd[0] |= FIELD_PREP(CMDQ_CFGI_0_SSID, ent->cfgi.ssid);
-		/* Fallthrough */
+		fallthrough;
 	case CMDQ_OP_CFGI_STE:
 		cmd[0] |= FIELD_PREP(CMDQ_CFGI_0_SID, ent->cfgi.sid);
 		cmd[1] |= FIELD_PREP(CMDQ_CFGI_1_LEAF, ent->cfgi.leaf);
@@ -936,7 +936,7 @@ static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent)
 		break;
 	case CMDQ_OP_TLBI_NH_ASID:
 		cmd[0] |= FIELD_PREP(CMDQ_TLBI_0_ASID, ent->tlbi.asid);
-		/* Fallthrough */
+		fallthrough;
 	case CMDQ_OP_TLBI_S12_VMALL:
 		cmd[0] |= FIELD_PREP(CMDQ_TLBI_0_VMID, ent->tlbi.vmid);
 		break;
@@ -1036,7 +1036,6 @@ static void arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu)
 		 */
 		return;
 	case CMDQ_ERR_CERROR_ILL_IDX:
-		/* Fallthrough */
 	default:
 		break;
 	}
@@ -3758,7 +3757,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
 	switch (FIELD_GET(IDR0_STALL_MODEL, reg)) {
 	case IDR0_STALL_MODEL_FORCE:
 		smmu->features |= ARM_SMMU_FEAT_STALL_FORCE;
-		/* Fallthrough */
+		fallthrough;
 	case IDR0_STALL_MODEL_STALL:
 		smmu->features |= ARM_SMMU_FEAT_STALLS;
 	}
@@ -3778,7 +3777,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
 	switch (FIELD_GET(IDR0_TTF, reg)) {
 	case IDR0_TTF_AARCH32_64:
 		smmu->ias = 40;
-		/* Fallthrough */
+		fallthrough;
 	case IDR0_TTF_AARCH64:
 		break;
 	default:
@@ -3875,7 +3874,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
 	default:
 		dev_info(smmu->dev,
 			"unknown output address size. Truncating to 48-bit\n");
-		/* Fallthrough */
+		fallthrough;
 	case IDR5_OAS_48_BIT:
 		smmu->oas = 48;
 	}
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index e9864e52b0e96..f8177c59d229a 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -5070,7 +5070,6 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
 
 	switch (type) {
 	case IOMMU_DOMAIN_DMA:
-	/* fallthrough */
 	case IOMMU_DOMAIN_UNMANAGED:
 		dmar_domain = alloc_domain(0);
 		if (!dmar_domain) {
diff --git a/drivers/iommu/virtio-iommu.c b/drivers/iommu/virtio-iommu.c
index b4da396cce604..2bfdd57348443 100644
--- a/drivers/iommu/virtio-iommu.c
+++ b/drivers/iommu/virtio-iommu.c
@@ -440,7 +440,7 @@ static int viommu_add_resv_mem(struct viommu_endpoint *vdev,
 	default:
 		dev_warn(vdev->dev, "unknown resv mem subtype 0x%x\n",
 			 mem->subtype);
-		/* Fall-through */
+		fallthrough;
 	case VIRTIO_IOMMU_RESV_MEM_T_RESERVED:
 		region = iommu_alloc_resv_region(start, size, 0,
 						 IOMMU_RESV_RESERVED);
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 95f097448f971..548de7538632a 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -2737,7 +2737,7 @@ static bool allocate_vpe_l2_table(int cpu, u32 id)
 	switch (gpsz) {
 	default:
 		WARN_ON(1);
-		/* fall through */
+		fallthrough;
 	case GIC_PAGE_SIZE_4K:
 		psz = SZ_4K;
 		break;
@@ -2832,7 +2832,7 @@ static int allocate_vpe_l1_table(void)
 	switch (gpsz) {
 	default:
 		gpsz = GIC_PAGE_SIZE_4K;
-		/* fall through */
+		fallthrough;
 	case GIC_PAGE_SIZE_4K:
 		psz = SZ_4K;
 		break;
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index 324f280ff6066..850842f27beee 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -965,10 +965,10 @@ static void gic_cpu_sys_reg_init(void)
 		case 7:
 			write_gicreg(0, ICC_AP0R3_EL1);
 			write_gicreg(0, ICC_AP0R2_EL1);
-		/* Fall through */
+			fallthrough;
 		case 6:
 			write_gicreg(0, ICC_AP0R1_EL1);
-		/* Fall through */
+			fallthrough;
 		case 5:
 		case 4:
 			write_gicreg(0, ICC_AP0R0_EL1);
@@ -982,10 +982,10 @@ static void gic_cpu_sys_reg_init(void)
 	case 7:
 		write_gicreg(0, ICC_AP1R3_EL1);
 		write_gicreg(0, ICC_AP1R2_EL1);
-		/* Fall through */
+		fallthrough;
 	case 6:
 		write_gicreg(0, ICC_AP1R1_EL1);
-		/* Fall through */
+		fallthrough;
 	case 5:
 	case 4:
 		write_gicreg(0, ICC_AP1R0_EL1);
diff --git a/drivers/irqchip/irq-imx-gpcv2.c b/drivers/irqchip/irq-imx-gpcv2.c
index 4f74c15c47555..7031ef44de4f3 100644
--- a/drivers/irqchip/irq-imx-gpcv2.c
+++ b/drivers/irqchip/irq-imx-gpcv2.c
@@ -259,7 +259,7 @@ static int __init imx_gpcv2_irqchip_init(struct device_node *node,
 		case 4:
 			writel_relaxed(~0, reg + GPC_IMR1_CORE2);
 			writel_relaxed(~0, reg + GPC_IMR1_CORE3);
-			/* fall through */
+			fallthrough;
 		case 2:
 			writel_relaxed(~0, reg + GPC_IMR1_CORE0);
 			writel_relaxed(~0, reg + GPC_IMR1_CORE1);
diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c
index aacfa012c082f..215885962bb0a 100644
--- a/drivers/irqchip/irq-mips-gic.c
+++ b/drivers/irqchip/irq-mips-gic.c
@@ -480,7 +480,7 @@ static int gic_irq_domain_map(struct irq_domain *d, unsigned int virq,
 	case GIC_LOCAL_INT_TIMER:
 		/* CONFIG_MIPS_CMP workaround (see __gic_init) */
 		map = GIC_MAP_PIN_MAP_TO_PIN | timer_cpu_pin;
-		/* fall-through */
+		fallthrough;
 	case GIC_LOCAL_INT_PERFCTR:
 	case GIC_LOCAL_INT_FDC:
 		/*
diff --git a/drivers/irqchip/irq-vic.c b/drivers/irqchip/irq-vic.c
index bc235db8a4c5b..e460363742272 100644
--- a/drivers/irqchip/irq-vic.c
+++ b/drivers/irqchip/irq-vic.c
@@ -455,7 +455,7 @@ static void __init __vic_init(void __iomem *base, int parent_irq, int irq_start,
 		return;
 	default:
 		printk(KERN_WARNING "VIC: unknown vendor, continuing anyways\n");
-		/* fall through */
+		fallthrough;
 	case AMBA_VENDOR_ARM:
 		break;
 	}
diff --git a/drivers/isdn/hardware/mISDN/avmfritz.c b/drivers/isdn/hardware/mISDN/avmfritz.c
index ecc1ef6c386d8..f68569bfef7a7 100644
--- a/drivers/isdn/hardware/mISDN/avmfritz.c
+++ b/drivers/isdn/hardware/mISDN/avmfritz.c
@@ -348,7 +348,7 @@ modehdlc(struct bchannel *bch, int protocol)
 	switch (protocol) {
 	case -1: /* used for init */
 		bch->state = -1;
-		/* fall through */
+		fallthrough;
 	case ISDN_P_NONE:
 		if (bch->state == ISDN_P_NONE)
 			break;
diff --git a/drivers/isdn/hardware/mISDN/hfc_multi_8xx.h b/drivers/isdn/hardware/mISDN/hfc_multi_8xx.h
index b0d772340e163..448ded8f9d24e 100644
--- a/drivers/isdn/hardware/mISDN/hfc_multi_8xx.h
+++ b/drivers/isdn/hardware/mISDN/hfc_multi_8xx.h
@@ -121,7 +121,6 @@ setup_embedded(struct hfc_multi *hc, struct hm_map *m)
 	case HFC_IO_MODE_EMBSD:
 		test_and_set_bit(HFC_CHIP_EMBSD, &hc->chip);
 		hc->slots = 128; /* required */
-		/* fall through */
 		hc->HFC_outb = HFC_outb_embsd;
 		hc->HFC_inb = HFC_inb_embsd;
 		hc->HFC_inw = HFC_inw_embsd;
diff --git a/drivers/isdn/hardware/mISDN/hfcpci.c b/drivers/isdn/hardware/mISDN/hfcpci.c
index 904a4f4c5ff9e..56bd2e9db6ed6 100644
--- a/drivers/isdn/hardware/mISDN/hfcpci.c
+++ b/drivers/isdn/hardware/mISDN/hfcpci.c
@@ -1280,7 +1280,7 @@ mode_hfcpci(struct bchannel *bch, int bc, int protocol)
 	case (-1): /* used for init */
 		bch->state = -1;
 		bch->nr = bc;
-		/* fall through */
+		fallthrough;
 	case (ISDN_P_NONE):
 		if (bch->state == ISDN_P_NONE)
 			return 0;
diff --git a/drivers/isdn/hardware/mISDN/hfcsusb.c b/drivers/isdn/hardware/mISDN/hfcsusb.c
index 4274906f86547..70061991915a5 100644
--- a/drivers/isdn/hardware/mISDN/hfcsusb.c
+++ b/drivers/isdn/hardware/mISDN/hfcsusb.c
@@ -695,7 +695,7 @@ hfcsusb_setup_bch(struct bchannel *bch, int protocol)
 	switch (protocol) {
 	case (-1):	/* used for init */
 		bch->state = -1;
-		/* fall through */
+		fallthrough;
 	case (ISDN_P_NONE):
 		if (bch->state == ISDN_P_NONE)
 			return 0; /* already in idle state */
diff --git a/drivers/isdn/hardware/mISDN/isdnhdlc.c b/drivers/isdn/hardware/mISDN/isdnhdlc.c
index 9fea16ed3dd86..985367e6711d4 100644
--- a/drivers/isdn/hardware/mISDN/isdnhdlc.c
+++ b/drivers/isdn/hardware/mISDN/isdnhdlc.c
@@ -397,7 +397,7 @@ int isdnhdlc_encode(struct isdnhdlc_vars *hdlc, const u8 *src, u16 slen,
 				dsize--;
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		case HDLC_SENDFLAG_ONE:
 			if (hdlc->bit_shift == 8) {
 				hdlc->cbin = hdlc->ffvalue >>
diff --git a/drivers/isdn/hardware/mISDN/mISDNinfineon.c b/drivers/isdn/hardware/mISDN/mISDNinfineon.c
index f4cb297668884..a16c7a2a7f3d0 100644
--- a/drivers/isdn/hardware/mISDN/mISDNinfineon.c
+++ b/drivers/isdn/hardware/mISDN/mISDNinfineon.c
@@ -875,7 +875,7 @@ release_card(struct inf_hw *card) {
 				release_card(card->sc[i]);
 			card->sc[i] = NULL;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		pci_disable_device(card->pdev);
 		pci_set_drvdata(card->pdev, NULL);
diff --git a/drivers/isdn/hardware/mISDN/mISDNisar.c b/drivers/isdn/hardware/mISDN/mISDNisar.c
index 11e8c7d8b6e89..56943409b60d9 100644
--- a/drivers/isdn/hardware/mISDN/mISDNisar.c
+++ b/drivers/isdn/hardware/mISDN/mISDNisar.c
@@ -957,7 +957,7 @@ isar_pump_statev_fax(struct isar_ch *ch, u8 devt) {
 				break;
 			case PCTRL_CMD_FTM:
 				p1 = 2;
-				/* fall through */
+				fallthrough;
 			case PCTRL_CMD_FTH:
 				send_mbox(ch->is, dps | ISAR_HIS_PUMPCTRL,
 					  PCTRL_CMD_SILON, 1, &p1);
@@ -1163,7 +1163,7 @@ setup_pump(struct isar_ch *ch) {
 			send_mbox(ch->is, dps | ISAR_HIS_PUMPCFG,
 				  PMOD_DTMF, 1, param);
 		}
-		/* fall through */
+		fallthrough;
 	case ISDN_P_B_MODEM_ASYNC:
 		ctrl = PMOD_DATAMODEM;
 		if (test_bit(FLG_ORIGIN, &ch->bch.Flags)) {
@@ -1255,7 +1255,7 @@ setup_iom2(struct isar_ch *ch) {
 	case ISDN_P_B_MODEM_ASYNC:
 	case ISDN_P_B_T30_FAX:
 		cmsb |= IOM_CTRL_RCV;
-		/* fall through */
+		fallthrough;
 	case ISDN_P_B_L2DTMF:
 		if (test_bit(FLG_DTMFSEND, &ch->bch.Flags))
 			cmsb |= IOM_CTRL_RCV;
@@ -1548,7 +1548,7 @@ isar_l2l1(struct mISDNchannel *ch, struct sk_buff *skb)
 				ich->is->name, hh->id);
 			ret = -EINVAL;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		pr_info("%s: %s unknown prim(%x,%x)\n",
 			ich->is->name, __func__, hh->prim, hh->id);
diff --git a/drivers/isdn/mISDN/stack.c b/drivers/isdn/mISDN/stack.c
index 27aa32914425d..c2f76f3986134 100644
--- a/drivers/isdn/mISDN/stack.c
+++ b/drivers/isdn/mISDN/stack.c
@@ -528,7 +528,7 @@ create_l2entity(struct mISDNdevice *dev, struct mISDNchannel *ch,
 		rq.protocol = ISDN_P_NT_S0;
 		if (dev->Dprotocols & (1 << ISDN_P_NT_E1))
 			rq.protocol = ISDN_P_NT_E1;
-		/* fall through */
+		fallthrough;
 	case ISDN_P_LAPD_TE:
 		ch->recv = mISDN_queue_message;
 		ch->peer = &dev->D.st->own;
diff --git a/drivers/lightnvm/pblk-core.c b/drivers/lightnvm/pblk-core.c
index b413bafe93fdd..97c68731406b3 100644
--- a/drivers/lightnvm/pblk-core.c
+++ b/drivers/lightnvm/pblk-core.c
@@ -301,7 +301,7 @@ void pblk_free_rqd(struct pblk *pblk, struct nvm_rq *rqd, int type)
 	switch (type) {
 	case PBLK_WRITE:
 		kfree(((struct pblk_c_ctx *)nvm_rq_to_pdu(rqd))->lun_bitmap);
-		/* fall through */
+		fallthrough;
 	case PBLK_WRITE_INT:
 		pool = &pblk->w_rq_pool;
 		break;
diff --git a/drivers/macintosh/adbhid.c b/drivers/macintosh/adbhid.c
index 75482eeab2c4d..994ba5cb36789 100644
--- a/drivers/macintosh/adbhid.c
+++ b/drivers/macintosh/adbhid.c
@@ -881,7 +881,7 @@ adbhid_input_register(int id, int default_id, int original_handler_id,
 		}
 		if (hid->name[0])
 			break;
-		/* else fall through */
+		fallthrough;
 
 	default:
 		pr_info("Trying to register unknown ADB device to input layer.\n");
diff --git a/drivers/macintosh/smu.c b/drivers/macintosh/smu.c
index 23f1f41c86029..96684581a25df 100644
--- a/drivers/macintosh/smu.c
+++ b/drivers/macintosh/smu.c
@@ -852,7 +852,7 @@ int smu_queue_i2c(struct smu_i2c_cmd *cmd)
 		break;
 	case SMU_I2C_TRANSFER_COMBINED:
 		cmd->info.devaddr &= 0xfe;
-		/* fall through */
+		fallthrough;
 	case SMU_I2C_TRANSFER_STDSUB:
 		if (cmd->info.sublen > 3)
 			return -EINVAL;
diff --git a/drivers/md/bcache/journal.c b/drivers/md/bcache/journal.c
index 77fbfd52edcf9..c1227bdb57e7f 100644
--- a/drivers/md/bcache/journal.c
+++ b/drivers/md/bcache/journal.c
@@ -608,7 +608,7 @@ static void do_journal_discard(struct cache *ca)
 			ca->sb.njournal_buckets;
 
 		atomic_set(&ja->discard_in_flight, DISCARD_READY);
-		/* fallthrough */
+		fallthrough;
 
 	case DISCARD_READY:
 		if (ja->discard_idx == ja->last_idx)
diff --git a/drivers/md/bcache/util.c b/drivers/md/bcache/util.c
index 62fb917f7a4f0..ae380bc3992e3 100644
--- a/drivers/md/bcache/util.c
+++ b/drivers/md/bcache/util.c
@@ -33,27 +33,27 @@ int bch_ ## name ## _h(const char *cp, type *res)		\
 	case 'y':						\
 	case 'z':						\
 		u++;						\
-		/* fall through */				\
+		fallthrough;					\
 	case 'e':						\
 		u++;						\
-		/* fall through */				\
+		fallthrough;					\
 	case 'p':						\
 		u++;						\
-		/* fall through */				\
+		fallthrough;					\
 	case 't':						\
 		u++;						\
-		/* fall through */				\
+		fallthrough;					\
 	case 'g':						\
 		u++;						\
-		/* fall through */				\
+		fallthrough;					\
 	case 'm':						\
 		u++;						\
-		/* fall through */				\
+		fallthrough;					\
 	case 'k':						\
 		u++;						\
 		if (e++ == cp)					\
 			return -EINVAL;				\
-		/* fall through */				\
+		fallthrough;					\
 	case '\n':						\
 	case '\0':						\
 		if (*e == '\n')					\
diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 1489607212546..238cd80826a69 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -1552,7 +1552,7 @@ static blk_status_t crypt_convert(struct crypt_config *cc,
 		case -EBUSY:
 			wait_for_completion(&ctx->restart);
 			reinit_completion(&ctx->restart);
-			/* fall through */
+			fallthrough;
 		/*
 		 * The request is queued and processed asynchronously,
 		 * completion function kcryptd_async_done() will be called.
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 53645a6f474cb..e3283d35c7fdb 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1554,7 +1554,7 @@ static void pg_init_done(void *data, int errors)
 	case SCSI_DH_RETRY:
 		/* Wait before retrying. */
 		delay_retry = true;
-		/* fall through */
+		fallthrough;
 	case SCSI_DH_IMM_RETRY:
 	case SCSI_DH_RES_TEMP_UNAVAIL:
 		if (pg_init_limit_reached(m, pgpath))
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 32fa6499739fb..fb0255d25e4b2 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1021,7 +1021,7 @@ static void clone_endio(struct bio *bio)
 		switch (r) {
 		case DM_ENDIO_REQUEUE:
 			error = BLK_STS_DM_REQUEUE;
-			/*FALLTHRU*/
+			fallthrough;
 		case DM_ENDIO_DONE:
 			break;
 		case DM_ENDIO_INCOMPLETE:
diff --git a/drivers/md/md-autodetect.c b/drivers/md/md-autodetect.c
index 6bbec89976a74..2cf973722f596 100644
--- a/drivers/md/md-autodetect.c
+++ b/drivers/md/md-autodetect.c
@@ -102,10 +102,10 @@ static int __init md_setup(char *str)
 				pername = "raid0";
 			break;
 		}
-		/* FALL THROUGH */
+		fallthrough;
 	case 1: /* the first device is numeric */
 		str = str1;
-		/* FALL THROUGH */
+		fallthrough;
 	case 0:
 		md_setup_args[ent].level = LEVEL_NONE;
 		pername="super-block";
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c
index d61b524ae4401..b10c51988c8ee 100644
--- a/drivers/md/md-bitmap.c
+++ b/drivers/md/md-bitmap.c
@@ -1433,7 +1433,7 @@ int md_bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long s
 		case 0:
 			md_bitmap_file_set_bit(bitmap, offset);
 			md_bitmap_count_page(&bitmap->counts, offset, 1);
-			/* fall through */
+			fallthrough;
 		case 1:
 			*bmc = 2;
 		}
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index ef0fd4830803f..8b743657b957e 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4083,7 +4083,7 @@ static void handle_parity_checks5(struct r5conf *conf, struct stripe_head *sh,
 			break;
 		}
 		dev = &sh->dev[s->failed_num[0]];
-		/* fall through */
+		fallthrough;
 	case check_state_compute_result:
 		sh->check_state = check_state_idle;
 		if (!dev)
@@ -4214,7 +4214,7 @@ static void handle_parity_checks6(struct r5conf *conf, struct stripe_head *sh,
 
 		/* we have 2-disk failure */
 		BUG_ON(s->failed != 2);
-		/* fall through */
+		fallthrough;
 	case check_state_compute_result:
 		sh->check_state = check_state_idle;
 
diff --git a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
index 630a75e0eeb16..7607b516a7c43 100644
--- a/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
+++ b/drivers/media/common/v4l2-tpg/v4l2-tpg-core.c
@@ -210,7 +210,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 		tpg->vdownsampling[1] = 1;
 		tpg->hdownsampling[1] = 1;
 		tpg->planes = 2;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_RGB332:
 	case V4L2_PIX_FMT_RGB565:
 	case V4L2_PIX_FMT_RGB565X:
@@ -271,7 +271,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 	case V4L2_PIX_FMT_YUV420M:
 	case V4L2_PIX_FMT_YVU420M:
 		tpg->buffers = 3;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_YUV420:
 	case V4L2_PIX_FMT_YVU420:
 		tpg->vdownsampling[1] = 2;
@@ -284,7 +284,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 	case V4L2_PIX_FMT_YUV422M:
 	case V4L2_PIX_FMT_YVU422M:
 		tpg->buffers = 3;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_YUV422P:
 		tpg->vdownsampling[1] = 1;
 		tpg->vdownsampling[2] = 1;
@@ -296,7 +296,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 	case V4L2_PIX_FMT_NV16M:
 	case V4L2_PIX_FMT_NV61M:
 		tpg->buffers = 2;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_NV16:
 	case V4L2_PIX_FMT_NV61:
 		tpg->vdownsampling[1] = 1;
@@ -308,7 +308,7 @@ bool tpg_s_fourcc(struct tpg_data *tpg, u32 fourcc)
 	case V4L2_PIX_FMT_NV12M:
 	case V4L2_PIX_FMT_NV21M:
 		tpg->buffers = 2;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_NV12:
 	case V4L2_PIX_FMT_NV21:
 		tpg->vdownsampling[1] = 2;
@@ -1275,7 +1275,7 @@ static void gen_twopix(struct tpg_data *tpg,
 	case V4L2_PIX_FMT_RGB444:
 	case V4L2_PIX_FMT_XRGB444:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_YUV444:
 	case V4L2_PIX_FMT_ARGB444:
 		buf[0][offset] = (g_u_s << 4) | b_v;
@@ -1283,21 +1283,21 @@ static void gen_twopix(struct tpg_data *tpg,
 		break;
 	case V4L2_PIX_FMT_RGBX444:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_RGBA444:
 		buf[0][offset] = (b_v << 4) | (alpha >> 4);
 		buf[0][offset + 1] = (r_y_h << 4) | g_u_s;
 		break;
 	case V4L2_PIX_FMT_XBGR444:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_ABGR444:
 		buf[0][offset] = (g_u_s << 4) | r_y_h;
 		buf[0][offset + 1] = (alpha & 0xf0) | b_v;
 		break;
 	case V4L2_PIX_FMT_BGRX444:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_BGRA444:
 		buf[0][offset] = (r_y_h << 4) | (alpha >> 4);
 		buf[0][offset + 1] = (b_v << 4) | g_u_s;
@@ -1305,7 +1305,7 @@ static void gen_twopix(struct tpg_data *tpg,
 	case V4L2_PIX_FMT_RGB555:
 	case V4L2_PIX_FMT_XRGB555:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_YUV555:
 	case V4L2_PIX_FMT_ARGB555:
 		buf[0][offset] = (g_u_s << 5) | b_v;
@@ -1314,7 +1314,7 @@ static void gen_twopix(struct tpg_data *tpg,
 		break;
 	case V4L2_PIX_FMT_RGBX555:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_RGBA555:
 		buf[0][offset] = (g_u_s << 6) | (b_v << 1) |
 				 ((alpha & 0x80) >> 7);
@@ -1322,7 +1322,7 @@ static void gen_twopix(struct tpg_data *tpg,
 		break;
 	case V4L2_PIX_FMT_XBGR555:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_ABGR555:
 		buf[0][offset] = (g_u_s << 5) | r_y_h;
 		buf[0][offset + 1] = (alpha & 0x80) | (b_v << 2)
@@ -1330,7 +1330,7 @@ static void gen_twopix(struct tpg_data *tpg,
 		break;
 	case V4L2_PIX_FMT_BGRX555:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_BGRA555:
 		buf[0][offset] = (g_u_s << 6) | (r_y_h << 1) |
 				 ((alpha & 0x80) >> 7);
@@ -1339,7 +1339,7 @@ static void gen_twopix(struct tpg_data *tpg,
 	case V4L2_PIX_FMT_RGB555X:
 	case V4L2_PIX_FMT_XRGB555X:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_ARGB555X:
 		buf[0][offset] = (alpha & 0x80) | (r_y_h << 2) | (g_u_s >> 3);
 		buf[0][offset + 1] = (g_u_s << 5) | b_v;
@@ -1366,7 +1366,7 @@ static void gen_twopix(struct tpg_data *tpg,
 	case V4L2_PIX_FMT_HSV32:
 	case V4L2_PIX_FMT_XYUV32:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_YUV32:
 	case V4L2_PIX_FMT_ARGB32:
 	case V4L2_PIX_FMT_AYUV32:
@@ -1377,7 +1377,7 @@ static void gen_twopix(struct tpg_data *tpg,
 		break;
 	case V4L2_PIX_FMT_RGBX32:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_RGBA32:
 		buf[0][offset] = r_y_h;
 		buf[0][offset + 1] = g_u_s;
@@ -1388,7 +1388,7 @@ static void gen_twopix(struct tpg_data *tpg,
 	case V4L2_PIX_FMT_XBGR32:
 	case V4L2_PIX_FMT_VUYX32:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_ABGR32:
 	case V4L2_PIX_FMT_VUYA32:
 		buf[0][offset] = b_v;
@@ -1398,7 +1398,7 @@ static void gen_twopix(struct tpg_data *tpg,
 		break;
 	case V4L2_PIX_FMT_BGRX32:
 		alpha = 0;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_BGRA32:
 		buf[0][offset] = alpha;
 		buf[0][offset + 1] = b_v;
diff --git a/drivers/media/dvb-core/dvb_net.c b/drivers/media/dvb-core/dvb_net.c
index 630509ecee205..89620da983bab 100644
--- a/drivers/media/dvb-core/dvb_net.c
+++ b/drivers/media/dvb-core/dvb_net.c
@@ -546,7 +546,7 @@ static int dvb_net_ule_new_payload(struct dvb_net_ule_handle *h)
 		h->priv->ule_sndu_type_1 = 1;
 		h->ts_remain -= 1;
 		h->from_where += 1;
-		/* fallthrough */
+		fallthrough;
 	case 0:
 		h->new_ts = 1;
 		h->ts += TS_SZ;
diff --git a/drivers/media/dvb-frontends/bcm3510.c b/drivers/media/dvb-frontends/bcm3510.c
index e92542b92d349..da0ff7b44da41 100644
--- a/drivers/media/dvb-frontends/bcm3510.c
+++ b/drivers/media/dvb-frontends/bcm3510.c
@@ -773,7 +773,7 @@ static int bcm3510_init(struct dvb_frontend* fe)
 			deb_info("attempting to download firmware\n");
 			if ((ret = bcm3510_init_cold(st)) < 0)
 				return ret;
-			/* fall-through */
+			fallthrough;
 		case JDEC_EEPROM_LOAD_WAIT:
 			deb_info("firmware is loaded\n");
 			bcm3510_check_firmware_version(st);
diff --git a/drivers/media/dvb-frontends/dib0090.c b/drivers/media/dvb-frontends/dib0090.c
index bc374750529b7..08a85831e917f 100644
--- a/drivers/media/dvb-frontends/dib0090.c
+++ b/drivers/media/dvb-frontends/dib0090.c
@@ -1693,7 +1693,7 @@ static int dib0090_dc_offset_calibration(struct dib0090_state *state, enum front
 		if (state->identity.p1g)
 			state->dc = dc_p1g_table;
 
-		/* fall through */
+		fallthrough;
 	case CT_TUNER_STEP_0:
 		dprintk("Start/continue DC calibration for %s path\n",
 			(state->dc->i == 1) ? "I" : "Q");
diff --git a/drivers/media/dvb-frontends/dib3000mb.c b/drivers/media/dvb-frontends/dib3000mb.c
index 0f0480d8576d7..a6c2fc4586eb3 100644
--- a/drivers/media/dvb-frontends/dib3000mb.c
+++ b/drivers/media/dvb-frontends/dib3000mb.c
@@ -224,7 +224,7 @@ static int dib3000mb_set_frontend(struct dvb_frontend *fe, int tuner)
 	switch (c->hierarchy) {
 		case HIERARCHY_NONE:
 			deb_setf("hierarchy: none\n");
-			/* fall through */
+			fallthrough;
 		case HIERARCHY_1:
 			deb_setf("hierarchy: alpha=1\n");
 			wr(DIB3000MB_REG_VIT_ALPHA, DIB3000_ALPHA_1);
diff --git a/drivers/media/dvb-frontends/dib7000p.c b/drivers/media/dvb-frontends/dib7000p.c
index 0a7790c4bad39..55bee50aa8716 100644
--- a/drivers/media/dvb-frontends/dib7000p.c
+++ b/drivers/media/dvb-frontends/dib7000p.c
@@ -276,7 +276,7 @@ static int dib7000p_set_power_mode(struct dib7000p_state *state, enum dib7000p_p
 		if (state->version != SOC7090)
 			reg_1280 &= ~((1 << 11));
 		reg_1280 &= ~(1 << 6);
-		/* fall-through */
+		fallthrough;
 	case DIB7000P_POWER_INTERFACE_ONLY:
 		/* just leave power on the control-interfaces: GPIO and (I2C or SDIO) */
 		/* TODO power up either SDIO or I2C */
diff --git a/drivers/media/dvb-frontends/drx39xyj/drxj.c b/drivers/media/dvb-frontends/drx39xyj/drxj.c
index 5de016412c429..237b9d04c0766 100644
--- a/drivers/media/dvb-frontends/drx39xyj/drxj.c
+++ b/drivers/media/dvb-frontends/drx39xyj/drxj.c
@@ -2306,7 +2306,7 @@ hi_command(struct i2c_device_addr *dev_addr, const struct drxj_hi_cmd *cmd, u16
 			pr_err("error %d\n", rc);
 			goto rw_error;
 		}
-		/* fallthrough */
+		fallthrough;
 	case SIO_HI_RA_RAM_CMD_BRDCTRL:
 		rc = drxj_dap_write_reg16(dev_addr, SIO_HI_RA_RAM_PAR_2__A, cmd->param2, 0);
 		if (rc != 0) {
@@ -2318,7 +2318,7 @@ hi_command(struct i2c_device_addr *dev_addr, const struct drxj_hi_cmd *cmd, u16
 			pr_err("error %d\n", rc);
 			goto rw_error;
 		}
-		/* fallthrough */
+		fallthrough;
 	case SIO_HI_RA_RAM_CMD_NULL:
 		/* No parameters */
 		break;
@@ -2841,7 +2841,7 @@ ctrl_set_cfg_mpeg_output(struct drx_demod_instance *demod, struct drx_cfg_mpeg_o
 			/* coef = 188/204                          */
 			max_bit_rate =
 			    (ext_attr->curr_symbol_rate / 8) * nr_bits * 188;
-			/* fall-through - as b/c Annex A/C need following settings */
+			fallthrough;	/* as b/c Annex A/C need following settings */
 		case DRX_STANDARD_ITU_B:
 			rc = drxj_dap_write_reg16(dev_addr, FEC_OC_FCT_USAGE__A, FEC_OC_FCT_USAGE__PRE, 0);
 			if (rc != 0) {
@@ -3555,8 +3555,8 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
 		if (!ext_attr->has_smatx)
 			return -EIO;
 		switch (uio_cfg->mode) {
-		case DRX_UIO_MODE_FIRMWARE_SMA:	/* fall through */
-		case DRX_UIO_MODE_FIRMWARE_SAW:	/* fall through */
+		case DRX_UIO_MODE_FIRMWARE_SMA:
+		case DRX_UIO_MODE_FIRMWARE_SAW:
 		case DRX_UIO_MODE_READWRITE:
 			ext_attr->uio_sma_tx_mode = uio_cfg->mode;
 			break;
@@ -3579,7 +3579,7 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
 		if (!ext_attr->has_smarx)
 			return -EIO;
 		switch (uio_cfg->mode) {
-		case DRX_UIO_MODE_FIRMWARE0:	/* fall through */
+		case DRX_UIO_MODE_FIRMWARE0:
 		case DRX_UIO_MODE_READWRITE:
 			ext_attr->uio_sma_rx_mode = uio_cfg->mode;
 			break;
@@ -3603,7 +3603,7 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
 		if (!ext_attr->has_gpio)
 			return -EIO;
 		switch (uio_cfg->mode) {
-		case DRX_UIO_MODE_FIRMWARE0:	/* fall through */
+		case DRX_UIO_MODE_FIRMWARE0:
 		case DRX_UIO_MODE_READWRITE:
 			ext_attr->uio_gpio_mode = uio_cfg->mode;
 			break;
@@ -3639,7 +3639,7 @@ static int ctrl_set_uio_cfg(struct drx_demod_instance *demod, struct drxuio_cfg
 			}
 			ext_attr->uio_irqn_mode = uio_cfg->mode;
 			break;
-		case DRX_UIO_MODE_FIRMWARE0:	/* fall through */
+		case DRX_UIO_MODE_FIRMWARE0:
 		default:
 			return -EINVAL;
 			break;
@@ -4004,31 +4004,36 @@ static int scu_command(struct i2c_device_addr *dev_addr, struct drxjscu_cmd *cmd
 		if (rc != 0) {
 			pr_err("error %d\n", rc);
 			goto rw_error;
-		}	/* fallthrough */
+		}
+		fallthrough;
 	case 4:
 		rc = drxj_dap_write_reg16(dev_addr, SCU_RAM_PARAM_3__A, *(cmd->parameter + 3), 0);
 		if (rc != 0) {
 			pr_err("error %d\n", rc);
 			goto rw_error;
-		}	/* fallthrough */
+		}
+		fallthrough;
 	case 3:
 		rc = drxj_dap_write_reg16(dev_addr, SCU_RAM_PARAM_2__A, *(cmd->parameter + 2), 0);
 		if (rc != 0) {
 			pr_err("error %d\n", rc);
 			goto rw_error;
-		}	/* fallthrough */
+		}
+		fallthrough;
 	case 2:
 		rc = drxj_dap_write_reg16(dev_addr, SCU_RAM_PARAM_1__A, *(cmd->parameter + 1), 0);
 		if (rc != 0) {
 			pr_err("error %d\n", rc);
 			goto rw_error;
-		}	/* fallthrough */
+		}
+		fallthrough;
 	case 1:
 		rc = drxj_dap_write_reg16(dev_addr, SCU_RAM_PARAM_0__A, *(cmd->parameter + 0), 0);
 		if (rc != 0) {
 			pr_err("error %d\n", rc);
 			goto rw_error;
-		}	/* fallthrough */
+		}
+		fallthrough;
 	case 0:
 		/* do nothing */
 		break;
@@ -4068,25 +4073,29 @@ static int scu_command(struct i2c_device_addr *dev_addr, struct drxjscu_cmd *cmd
 			if (rc != 0) {
 				pr_err("error %d\n", rc);
 				goto rw_error;
-			}	/* fallthrough */
+			}
+			fallthrough;
 		case 3:
 			rc = drxj_dap_read_reg16(dev_addr, SCU_RAM_PARAM_2__A, cmd->result + 2, 0);
 			if (rc != 0) {
 				pr_err("error %d\n", rc);
 				goto rw_error;
-			}	/* fallthrough */
+			}
+			fallthrough;
 		case 2:
 			rc = drxj_dap_read_reg16(dev_addr, SCU_RAM_PARAM_1__A, cmd->result + 1, 0);
 			if (rc != 0) {
 				pr_err("error %d\n", rc);
 				goto rw_error;
-			}	/* fallthrough */
+			}
+			fallthrough;
 		case 1:
 			rc = drxj_dap_read_reg16(dev_addr, SCU_RAM_PARAM_0__A, cmd->result + 0, 0);
 			if (rc != 0) {
 				pr_err("error %d\n", rc);
 				goto rw_error;
-			}	/* fallthrough */
+			}
+			fallthrough;
 		case 0:
 			/* do nothing */
 			break;
@@ -4791,7 +4800,7 @@ set_frequency(struct drx_demod_instance *demod,
 		   Sound carrier is already 3Mhz above centre frequency due
 		   to tuner setting so now add an extra shift of 1MHz... */
 		fm_frequency_shift = 1000;
-		/*fall through */
+		fallthrough;
 	case DRX_STANDARD_ITU_B:
 	case DRX_STANDARD_NTSC:
 	case DRX_STANDARD_PAL_SECAM_BG:
@@ -10475,11 +10484,11 @@ ctrl_set_channel(struct drx_demod_instance *demod, struct drx_channel *channel)
 	    (standard == DRX_STANDARD_NTSC)) {
 		switch (channel->bandwidth) {
 		case DRX_BANDWIDTH_6MHZ:
-		case DRX_BANDWIDTH_UNKNOWN:	/* fall through */
+		case DRX_BANDWIDTH_UNKNOWN:
 			channel->bandwidth = DRX_BANDWIDTH_6MHZ;
 			break;
-		case DRX_BANDWIDTH_8MHZ:	/* fall through */
-		case DRX_BANDWIDTH_7MHZ:	/* fall through */
+		case DRX_BANDWIDTH_8MHZ:
+		case DRX_BANDWIDTH_7MHZ:
 		default:
 			return -EINVAL;
 		}
@@ -10511,10 +10520,10 @@ ctrl_set_channel(struct drx_demod_instance *demod, struct drx_channel *channel)
 		}
 
 		switch (channel->constellation) {
-		case DRX_CONSTELLATION_QAM16:	/* fall through */
-		case DRX_CONSTELLATION_QAM32:	/* fall through */
-		case DRX_CONSTELLATION_QAM64:	/* fall through */
-		case DRX_CONSTELLATION_QAM128:	/* fall through */
+		case DRX_CONSTELLATION_QAM16:
+		case DRX_CONSTELLATION_QAM32:
+		case DRX_CONSTELLATION_QAM64:
+		case DRX_CONSTELLATION_QAM128:
 		case DRX_CONSTELLATION_QAM256:
 			bandwidth_temp = channel->symbolrate * bw_rolloff_factor;
 			bandwidth = bandwidth_temp / 100;
@@ -10628,8 +10637,8 @@ ctrl_set_channel(struct drx_demod_instance *demod, struct drx_channel *channel)
 		}
 		break;
 #ifndef DRXJ_VSB_ONLY
-	case DRX_STANDARD_ITU_A:	/* fallthrough */
-	case DRX_STANDARD_ITU_B:	/* fallthrough */
+	case DRX_STANDARD_ITU_A:
+	case DRX_STANDARD_ITU_B:
 	case DRX_STANDARD_ITU_C:
 		rc = set_qam_channel(demod, channel, tuner_freq_offset);
 		if (rc != 0) {
@@ -10820,7 +10829,7 @@ ctrl_lock_status(struct drx_demod_instance *demod, enum drx_lock_status *lock_st
 		    SCU_RAM_COMMAND_CMD_DEMOD_GET_LOCK;
 		break;
 #endif
-	case DRX_STANDARD_UNKNOWN:	/* fallthrough */
+	case DRX_STANDARD_UNKNOWN:
 	default:
 		return -EIO;
 	}
@@ -10888,8 +10897,8 @@ ctrl_set_standard(struct drx_demod_instance *demod, enum drx_standard *standard)
 	 */
 	switch (prev_standard) {
 #ifndef DRXJ_VSB_ONLY
-	case DRX_STANDARD_ITU_A:	/* fallthrough */
-	case DRX_STANDARD_ITU_B:	/* fallthrough */
+	case DRX_STANDARD_ITU_A:
+	case DRX_STANDARD_ITU_B:
 	case DRX_STANDARD_ITU_C:
 		rc = power_down_qam(demod, false);
 		if (rc != 0) {
@@ -10908,7 +10917,7 @@ ctrl_set_standard(struct drx_demod_instance *demod, enum drx_standard *standard)
 	case DRX_STANDARD_UNKNOWN:
 		/* Do nothing */
 		break;
-	case DRX_STANDARD_AUTO:	/* fallthrough */
+	case DRX_STANDARD_AUTO:
 	default:
 		return -EINVAL;
 	}
@@ -10921,8 +10930,8 @@ ctrl_set_standard(struct drx_demod_instance *demod, enum drx_standard *standard)
 
 	switch (*standard) {
 #ifndef DRXJ_VSB_ONLY
-	case DRX_STANDARD_ITU_A:	/* fallthrough */
-	case DRX_STANDARD_ITU_B:	/* fallthrough */
+	case DRX_STANDARD_ITU_A:
+	case DRX_STANDARD_ITU_B:
 	case DRX_STANDARD_ITU_C:
 		do {
 			u16 dummy;
@@ -11111,12 +11120,12 @@ ctrl_power_mode(struct drx_demod_instance *demod, enum drx_power_mode *mode)
 				goto rw_error;
 			}
 			break;
-		case DRX_STANDARD_PAL_SECAM_BG:	/* fallthrough */
-		case DRX_STANDARD_PAL_SECAM_DK:	/* fallthrough */
-		case DRX_STANDARD_PAL_SECAM_I:	/* fallthrough */
-		case DRX_STANDARD_PAL_SECAM_L:	/* fallthrough */
-		case DRX_STANDARD_PAL_SECAM_LP:	/* fallthrough */
-		case DRX_STANDARD_NTSC:	/* fallthrough */
+		case DRX_STANDARD_PAL_SECAM_BG:
+		case DRX_STANDARD_PAL_SECAM_DK:
+		case DRX_STANDARD_PAL_SECAM_I:
+		case DRX_STANDARD_PAL_SECAM_L:
+		case DRX_STANDARD_PAL_SECAM_LP:
+		case DRX_STANDARD_NTSC:
 		case DRX_STANDARD_FM:
 			rc = power_down_atv(demod, ext_attr->standard, true);
 			if (rc != 0) {
@@ -11127,7 +11136,7 @@ ctrl_power_mode(struct drx_demod_instance *demod, enum drx_power_mode *mode)
 		case DRX_STANDARD_UNKNOWN:
 			/* Do nothing */
 			break;
-		case DRX_STANDARD_AUTO:	/* fallthrough */
+		case DRX_STANDARD_AUTO:
 		default:
 			return -EIO;
 		}
@@ -11220,8 +11229,8 @@ ctrl_set_cfg_pre_saw(struct drx_demod_instance *demod, struct drxj_cfg_pre_saw *
 		ext_attr->vsb_pre_saw_cfg = *pre_saw;
 		break;
 #ifndef DRXJ_VSB_ONLY
-	case DRX_STANDARD_ITU_A:	/* fallthrough */
-	case DRX_STANDARD_ITU_B:	/* fallthrough */
+	case DRX_STANDARD_ITU_A:
+	case DRX_STANDARD_ITU_B:
 	case DRX_STANDARD_ITU_C:
 		ext_attr->qam_pre_saw_cfg = *pre_saw;
 		break;
@@ -11264,10 +11273,10 @@ ctrl_set_cfg_afe_gain(struct drx_demod_instance *demod, struct drxj_cfg_afe_gain
 	ext_attr = (struct drxj_data *) demod->my_ext_attr;
 
 	switch (afe_gain->standard) {
-	case DRX_STANDARD_8VSB:	/* fallthrough */
+	case DRX_STANDARD_8VSB:	fallthrough;
 #ifndef DRXJ_VSB_ONLY
-	case DRX_STANDARD_ITU_A:	/* fallthrough */
-	case DRX_STANDARD_ITU_B:	/* fallthrough */
+	case DRX_STANDARD_ITU_A:
+	case DRX_STANDARD_ITU_B:
 	case DRX_STANDARD_ITU_C:
 #endif
 		/* Do nothing */
@@ -11301,8 +11310,8 @@ ctrl_set_cfg_afe_gain(struct drx_demod_instance *demod, struct drxj_cfg_afe_gain
 		ext_attr->vsb_pga_cfg = gain * 13 + 140;
 		break;
 #ifndef DRXJ_VSB_ONLY
-	case DRX_STANDARD_ITU_A:	/* fallthrough */
-	case DRX_STANDARD_ITU_B:	/* fallthrough */
+	case DRX_STANDARD_ITU_A:
+	case DRX_STANDARD_ITU_B:
 	case DRX_STANDARD_ITU_C:
 		ext_attr->qam_pga_cfg = gain * 13 + 140;
 		break;
diff --git a/drivers/media/dvb-frontends/drxd_hard.c b/drivers/media/dvb-frontends/drxd_hard.c
index fae6f3763364a..45f9828639042 100644
--- a/drivers/media/dvb-frontends/drxd_hard.c
+++ b/drivers/media/dvb-frontends/drxd_hard.c
@@ -1512,14 +1512,14 @@ static int SetDeviceTypeId(struct drxd_state *state)
 			switch (deviceId) {
 			case 4:
 				state->diversity = 1;
-				/* fall through */
+				fallthrough;
 			case 3:
 			case 7:
 				state->PGA = 1;
 				break;
 			case 6:
 				state->diversity = 1;
-				/* fall through */
+				fallthrough;
 			case 5:
 			case 8:
 				break;
@@ -1966,7 +1966,7 @@ static int DRX_Start(struct drxd_state *state, s32 off)
 		switch (p->transmission_mode) {
 		default:	/* Not set, detect it automatically */
 			operationMode |= SC_RA_RAM_OP_AUTO_MODE__M;
-			/* fall through - try first guess DRX_FFTMODE_8K */
+			fallthrough;	/* try first guess DRX_FFTMODE_8K */
 		case TRANSMISSION_MODE_8K:
 			transmissionParams |= SC_RA_RAM_OP_PARAM_MODE_8K;
 			if (state->type_A) {
@@ -2139,7 +2139,7 @@ static int DRX_Start(struct drxd_state *state, s32 off)
 		switch (p->modulation) {
 		default:
 			operationMode |= SC_RA_RAM_OP_AUTO_CONST__M;
-			/* fall through - try first guess DRX_CONSTELLATION_QAM64 */
+			fallthrough;	/* try first guess DRX_CONSTELLATION_QAM64 */
 		case QAM_64:
 			transmissionParams |= SC_RA_RAM_OP_PARAM_CONST_QAM64;
 			if (state->type_A) {
@@ -2266,7 +2266,7 @@ static int DRX_Start(struct drxd_state *state, s32 off)
 			break;
 		default:
 			operationMode |= SC_RA_RAM_OP_AUTO_RATE__M;
-			/* fall through */
+			fallthrough;
 		case FEC_2_3:
 			transmissionParams |= SC_RA_RAM_OP_PARAM_RATE_2_3;
 			if (state->type_A)
@@ -2301,7 +2301,7 @@ static int DRX_Start(struct drxd_state *state, s32 off)
 		switch (p->bandwidth_hz) {
 		case 0:
 			p->bandwidth_hz = 8000000;
-			/* fall through */
+			fallthrough;
 		case 8000000:
 			/* (64/7)*(8/8)*1000000 */
 			bandwidth = DRXD_BANDWIDTH_8MHZ_IN_HZ;
diff --git a/drivers/media/dvb-frontends/drxk_hard.c b/drivers/media/dvb-frontends/drxk_hard.c
index 0ae9d8c72d8dc..32f9346deb3e9 100644
--- a/drivers/media/dvb-frontends/drxk_hard.c
+++ b/drivers/media/dvb-frontends/drxk_hard.c
@@ -1756,7 +1756,7 @@ static int setoperation_mode(struct drxk_state *state,
 			goto error;
 		state->m_operation_mode = OM_NONE;
 		break;
-	case OM_QAM_ITU_A:	/* fallthrough */
+	case OM_QAM_ITU_A:
 	case OM_QAM_ITU_C:
 		status = mpegts_stop(state);
 		if (status < 0)
@@ -1783,7 +1783,7 @@ static int setoperation_mode(struct drxk_state *state,
 		if (status < 0)
 			goto error;
 		break;
-	case OM_QAM_ITU_A:	/* fallthrough */
+	case OM_QAM_ITU_A:
 	case OM_QAM_ITU_C:
 		dprintk(1, ": DVB-C Annex %c\n",
 			(state->m_operation_mode == OM_QAM_ITU_A) ? 'A' : 'C');
@@ -2012,7 +2012,7 @@ static int mpegts_dto_setup(struct drxk_state *state,
 		fec_oc_rcn_ctl_rate = 0xC00000;
 		static_clk = state->m_dvbt_static_clk;
 		break;
-	case OM_QAM_ITU_A:	/* fallthrough */
+	case OM_QAM_ITU_A:
 	case OM_QAM_ITU_C:
 		fec_oc_tmd_mode = 0x0004;
 		fec_oc_rcn_ctl_rate = 0xD2B4EE;	/* good for >63 Mb/s */
@@ -3249,11 +3249,11 @@ static int dvbt_sc_command(struct drxk_state *state,
 	case OFDM_SC_RA_RAM_CMD_SET_PREF_PARAM:
 	case OFDM_SC_RA_RAM_CMD_PROGRAM_PARAM:
 		status |= write16(state, OFDM_SC_RA_RAM_PARAM1__A, param1);
-		/* fall through - All commands using 1 parameters */
+		fallthrough;	/* All commands using 1 parameters */
 	case OFDM_SC_RA_RAM_CMD_SET_ECHO_TIMING:
 	case OFDM_SC_RA_RAM_CMD_USER_IO:
 		status |= write16(state, OFDM_SC_RA_RAM_PARAM0__A, param0);
-		/* fall through - All commands using 0 parameters */
+		fallthrough;	/* All commands using 0 parameters */
 	case OFDM_SC_RA_RAM_CMD_GET_OP_PARAM:
 	case OFDM_SC_RA_RAM_CMD_NULL:
 		/* Write command */
@@ -3761,7 +3761,7 @@ static int set_dvbt(struct drxk_state *state, u16 intermediate_freqk_hz,
 	case TRANSMISSION_MODE_AUTO:
 	default:
 		operation_mode |= OFDM_SC_RA_RAM_OP_AUTO_MODE__M;
-		/* fall through - try first guess DRX_FFTMODE_8K */
+		fallthrough;	/* try first guess DRX_FFTMODE_8K */
 	case TRANSMISSION_MODE_8K:
 		transmission_params |= OFDM_SC_RA_RAM_OP_PARAM_MODE_8K;
 		break;
@@ -3775,7 +3775,7 @@ static int set_dvbt(struct drxk_state *state, u16 intermediate_freqk_hz,
 	default:
 	case GUARD_INTERVAL_AUTO:
 		operation_mode |= OFDM_SC_RA_RAM_OP_AUTO_GUARD__M;
-		/* fall through - try first guess DRX_GUARD_1DIV4 */
+		fallthrough;	/* try first guess DRX_GUARD_1DIV4 */
 	case GUARD_INTERVAL_1_4:
 		transmission_params |= OFDM_SC_RA_RAM_OP_PARAM_GUARD_4;
 		break;
@@ -3798,7 +3798,7 @@ static int set_dvbt(struct drxk_state *state, u16 intermediate_freqk_hz,
 		operation_mode |= OFDM_SC_RA_RAM_OP_AUTO_HIER__M;
 		/* try first guess SC_RA_RAM_OP_PARAM_HIER_NO */
 		/* transmission_params |= OFDM_SC_RA_RAM_OP_PARAM_HIER_NO; */
-		/* fall through */
+		fallthrough;
 	case HIERARCHY_1:
 		transmission_params |= OFDM_SC_RA_RAM_OP_PARAM_HIER_A1;
 		break;
@@ -3816,7 +3816,7 @@ static int set_dvbt(struct drxk_state *state, u16 intermediate_freqk_hz,
 	case QAM_AUTO:
 	default:
 		operation_mode |= OFDM_SC_RA_RAM_OP_AUTO_CONST__M;
-		/* fall through - try first guess DRX_CONSTELLATION_QAM64 */
+		fallthrough;	/* try first guess DRX_CONSTELLATION_QAM64 */
 	case QAM_64:
 		transmission_params |= OFDM_SC_RA_RAM_OP_PARAM_CONST_QAM64;
 		break;
@@ -3841,7 +3841,7 @@ static int set_dvbt(struct drxk_state *state, u16 intermediate_freqk_hz,
 		WR16(dev_addr, OFDM_EC_SB_PRIOR__A,
 			OFDM_EC_SB_PRIOR_HI));
 		break;
-	case DRX_PRIORITY_UNKNOWN:	/* fall through */
+	case DRX_PRIORITY_UNKNOWN:
 	default:
 		status = -EINVAL;
 		goto error;
@@ -3859,7 +3859,7 @@ static int set_dvbt(struct drxk_state *state, u16 intermediate_freqk_hz,
 	case FEC_AUTO:
 	default:
 		operation_mode |= OFDM_SC_RA_RAM_OP_AUTO_RATE__M;
-		/* fall through - try first guess DRX_CODERATE_2DIV3 */
+		fallthrough;	/* try first guess DRX_CODERATE_2DIV3 */
 	case FEC_2_3:
 		transmission_params |= OFDM_SC_RA_RAM_OP_PARAM_RATE_2_3;
 		break;
@@ -3893,7 +3893,7 @@ static int set_dvbt(struct drxk_state *state, u16 intermediate_freqk_hz,
 	switch (state->props.bandwidth_hz) {
 	case 0:
 		state->props.bandwidth_hz = 8000000;
-		/* fall through */
+		fallthrough;
 	case 8000000:
 		bandwidth = DRXK_BANDWIDTH_8MHZ_IN_HZ;
 		status = write16(state, OFDM_SC_RA_RAM_SRMM_FIX_FACT_8K__A,
diff --git a/drivers/media/dvb-frontends/lgdt3306a.c b/drivers/media/dvb-frontends/lgdt3306a.c
index d3c330e035c45..722576f1732aa 100644
--- a/drivers/media/dvb-frontends/lgdt3306a.c
+++ b/drivers/media/dvb-frontends/lgdt3306a.c
@@ -768,7 +768,7 @@ static int lgdt3306a_set_if(struct lgdt3306a_state *state,
 	default:
 		pr_warn("IF=%d KHz is not supported, 3250 assumed\n",
 			if_freq_khz);
-		/* fallthrough */
+		fallthrough;
 	case 3250: /* 3.25Mhz */
 		nco1 = 0x34;
 		nco2 = 0x00;
diff --git a/drivers/media/dvb-frontends/mt352.c b/drivers/media/dvb-frontends/mt352.c
index 881897583cf2d..399d5c519027e 100644
--- a/drivers/media/dvb-frontends/mt352.c
+++ b/drivers/media/dvb-frontends/mt352.c
@@ -201,7 +201,7 @@ static int mt352_set_parameters(struct dvb_frontend *fe)
 			if (op->hierarchy == HIERARCHY_AUTO ||
 			    op->hierarchy == HIERARCHY_NONE)
 				break;
-			/* fall through */
+			fallthrough;
 		default:
 			return -EINVAL;
 	}
diff --git a/drivers/media/dvb-frontends/mxl5xx.c b/drivers/media/dvb-frontends/mxl5xx.c
index 290b9eab099ff..4404ace82981c 100644
--- a/drivers/media/dvb-frontends/mxl5xx.c
+++ b/drivers/media/dvb-frontends/mxl5xx.c
@@ -739,7 +739,7 @@ static int get_frontend(struct dvb_frontend *fe,
 		default:
 			break;
 		}
-		/* Fall through */
+		fallthrough;
 	case SYS_DVBS:
 		switch ((enum MXL_HYDRA_MODULATION_E)
 			reg_data[DMD_MODULATION_SCHEME_ADDR]) {
diff --git a/drivers/media/dvb-frontends/or51132.c b/drivers/media/dvb-frontends/or51132.c
index 35a3e47497c27..24de1b1151583 100644
--- a/drivers/media/dvb-frontends/or51132.c
+++ b/drivers/media/dvb-frontends/or51132.c
@@ -482,7 +482,7 @@ static int or51132_read_snr(struct dvb_frontend* fe, u16* snr)
 	switch (reg&0xff) {
 	case 0x06:
 		if (reg & 0x1000) usK = 3 << 24;
-		/* fall through */
+		fallthrough;
 	case 0x43: /* QAM64 */
 		c = 150204167;
 		break;
diff --git a/drivers/media/dvb-frontends/s5h1411.c b/drivers/media/dvb-frontends/s5h1411.c
index 89402916d301f..c1334d7eb4420 100644
--- a/drivers/media/dvb-frontends/s5h1411.c
+++ b/drivers/media/dvb-frontends/s5h1411.c
@@ -398,7 +398,7 @@ static int s5h1411_set_if_freq(struct dvb_frontend *fe, int KHz)
 	default:
 		dprintk("%s(%d KHz) Invalid, defaulting to 5380\n",
 			__func__, KHz);
-		/* fall through */
+		fallthrough;
 	case 5380:
 	case 44000:
 		s5h1411_writereg(state, S5H1411_I2C_TOP_ADDR, 0x38, 0x1be4);
diff --git a/drivers/media/dvb-frontends/zl10353.c b/drivers/media/dvb-frontends/zl10353.c
index 2fc6aea580f90..2a2cf20a73d61 100644
--- a/drivers/media/dvb-frontends/zl10353.c
+++ b/drivers/media/dvb-frontends/zl10353.c
@@ -201,7 +201,7 @@ static int zl10353_set_parameters(struct dvb_frontend *fe)
 		break;
 	default:
 		c->bandwidth_hz = 8000000;
-		/* fall through */
+		fallthrough;
 	case 8000000:
 		zl10353_single_write(fe, MCLK_RATIO, 0x75);
 		zl10353_single_write(fe, 0x64, 0x36);
@@ -258,7 +258,7 @@ static int zl10353_set_parameters(struct dvb_frontend *fe)
 		if (c->hierarchy == HIERARCHY_AUTO ||
 		    c->hierarchy == HIERARCHY_NONE)
 			break;
-		/* fall through */
+		fallthrough;
 	default:
 		return -EINVAL;
 	}
diff --git a/drivers/media/pci/cx23885/cx23885-cards.c b/drivers/media/pci/cx23885/cx23885-cards.c
index 570a4a09c387a..03eee606af915 100644
--- a/drivers/media/pci/cx23885/cx23885-cards.c
+++ b/drivers/media/pci/cx23885/cx23885-cards.c
@@ -2209,7 +2209,7 @@ void cx23885_card_setup(struct cx23885_dev *dev)
 		ts2->gen_ctrl_val  = 0xc; /* Serial bus + punctured clock */
 		ts2->ts_clk_en_val = 0x1; /* Enable TS_CLK */
 		ts2->src_sel_val   = CX23885_SRC_SEL_PARALLEL_MPEG_VIDEO;
-		/* fall-through */
+		fallthrough;
 	case CX23885_BOARD_DVICO_FUSIONHDTV_5_EXP:
 		ts1->gen_ctrl_val  = 0xc; /* Serial bus + punctured clock */
 		ts1->ts_clk_en_val = 0x1; /* Enable TS_CLK */
@@ -2370,7 +2370,7 @@ void cx23885_card_setup(struct cx23885_dev *dev)
 		/* Currently only enabled for the integrated IR controller */
 		if (!enable_885_ir)
 			break;
-		/* fall-through */
+		fallthrough;
 	case CX23885_BOARD_HAUPPAUGE_HVR1250:
 	case CX23885_BOARD_HAUPPAUGE_HVR1800:
 	case CX23885_BOARD_HAUPPAUGE_IMPACTVCBE:
diff --git a/drivers/media/pci/ddbridge/ddbridge-core.c b/drivers/media/pci/ddbridge/ddbridge-core.c
index 7cabb9e9ffe21..92fe051c672f6 100644
--- a/drivers/media/pci/ddbridge/ddbridge-core.c
+++ b/drivers/media/pci/ddbridge/ddbridge-core.c
@@ -1310,7 +1310,7 @@ static void dvb_input_detach(struct ddb_input *input)
 			dvb_unregister_frontend(dvb->fe2);
 		if (dvb->fe)
 			dvb_unregister_frontend(dvb->fe);
-		/* fallthrough */
+		fallthrough;
 	case 0x30:
 		dvb_module_release(dvb->i2c_client[0]);
 		dvb->i2c_client[0] = NULL;
@@ -1321,22 +1321,22 @@ static void dvb_input_detach(struct ddb_input *input)
 			dvb_frontend_detach(dvb->fe);
 		dvb->fe = NULL;
 		dvb->fe2 = NULL;
-		/* fallthrough */
+		fallthrough;
 	case 0x20:
 		dvb_net_release(&dvb->dvbnet);
-		/* fallthrough */
+		fallthrough;
 	case 0x12:
 		dvbdemux->dmx.remove_frontend(&dvbdemux->dmx,
 					      &dvb->hw_frontend);
 		dvbdemux->dmx.remove_frontend(&dvbdemux->dmx,
 					      &dvb->mem_frontend);
-		/* fallthrough */
+		fallthrough;
 	case 0x11:
 		dvb_dmxdev_release(&dvb->dmxdev);
-		/* fallthrough */
+		fallthrough;
 	case 0x10:
 		dvb_dmx_release(&dvb->demux);
-		/* fallthrough */
+		fallthrough;
 	case 0x01:
 		break;
 	}
@@ -1559,7 +1559,7 @@ static int dvb_input_attach(struct ddb_input *input)
 			osc24 = 0;
 		else
 			osc24 = 1;
-		/* fall-through */
+		fallthrough;
 	case DDB_TUNER_DVBCT2_SONY_P:
 	case DDB_TUNER_DVBC2T2_SONY_P:
 	case DDB_TUNER_ISDBT_SONY_P:
@@ -1575,7 +1575,7 @@ static int dvb_input_attach(struct ddb_input *input)
 		break;
 	case DDB_TUNER_DVBC2T2I_SONY:
 		osc24 = 1;
-		/* fall-through */
+		fallthrough;
 	case DDB_TUNER_DVBCT2_SONY:
 	case DDB_TUNER_DVBC2T2_SONY:
 	case DDB_TUNER_ISDBT_SONY:
@@ -2036,7 +2036,7 @@ static int ddb_port_attach(struct ddb_port *port)
 		ret = ddb_ci_attach(port, ci_bitrate);
 		if (ret < 0)
 			break;
-		/* fall-through */
+		fallthrough;
 	case DDB_PORT_LOOP:
 		ret = dvb_register_device(port->dvb[0].adap,
 					  &port->dvb[0].dev,
@@ -2432,7 +2432,8 @@ void ddb_ports_init(struct ddb *dev)
 					ddb_input_init(port, 4 + i, 1, 4 + i);
 					ddb_output_init(port, i);
 					break;
-				} /* fallthrough */
+				}
+				fallthrough;
 			case DDB_OCTOPUS:
 				ddb_input_init(port, 2 * i, 0, 2 * i);
 				ddb_input_init(port, 2 * i + 1, 1, 2 * i + 1);
@@ -3417,7 +3418,7 @@ int ddb_exit_ddbridge(int stage, int error)
 	default:
 	case 2:
 		destroy_workqueue(ddb_wq);
-		/* fall-through */
+		fallthrough;
 	case 1:
 		ddb_class_destroy();
 		break;
diff --git a/drivers/media/pci/meye/meye.c b/drivers/media/pci/meye/meye.c
index 7fb3b1853b872..8944e4bd46382 100644
--- a/drivers/media/pci/meye/meye.c
+++ b/drivers/media/pci/meye/meye.c
@@ -952,7 +952,7 @@ static int meyeioc_sync(struct file *file, void *fh, int *i)
 			mutex_unlock(&meye.lock);
 			return -EINTR;
 		}
-		/* fall through */
+		fallthrough;
 	case MEYE_BUF_DONE:
 		meye.grab_buffer[*i].state = MEYE_BUF_UNUSED;
 		if (kfifo_out_locked(&meye.doneq, (unsigned char *)&unused,
diff --git a/drivers/media/pci/ttpci/av7110.c b/drivers/media/pci/ttpci/av7110.c
index bf36b1e22b635..45228f4f6fc6d 100644
--- a/drivers/media/pci/ttpci/av7110.c
+++ b/drivers/media/pci/ttpci/av7110.c
@@ -637,7 +637,7 @@ static void gpioirq(unsigned long cookie)
 			iwdebi(av7110, DEBINOSWAP, RX_BUFF, 0, 2);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 
 	case DATA_TS_RECORD:
 	case DATA_PES_RECORD:
@@ -2176,7 +2176,7 @@ static int frontend_init(struct av7110 *av7110)
 				break;
 			}
 		}
-		/* fall-thru */
+			fallthrough;
 
 		case 0x0008: // Hauppauge/TT DVB-T
 			// Grundig 29504-401
diff --git a/drivers/media/pci/ttpci/av7110_hw.c b/drivers/media/pci/ttpci/av7110_hw.c
index e8a8ec5405e2d..93ca31e38ddd3 100644
--- a/drivers/media/pci/ttpci/av7110_hw.c
+++ b/drivers/media/pci/ttpci/av7110_hw.c
@@ -1107,7 +1107,7 @@ int av7110_osd_cmd(struct av7110 *av7110, osd_cmd_t *dc)
 		break;
 	case OSD_SetRow:
 		dc->y1 = dc->y0;
-		/* fall through */
+		fallthrough;
 	case OSD_SetBlock:
 		ret = OSDSetBlock(av7110, dc->x0, dc->y0, dc->x1, dc->y1, dc->color, dc->data);
 		break;
diff --git a/drivers/media/pci/ttpci/av7110_ipack.c b/drivers/media/pci/ttpci/av7110_ipack.c
index ec528fae7333b..30330ed01ce88 100644
--- a/drivers/media/pci/ttpci/av7110_ipack.c
+++ b/drivers/media/pci/ttpci/av7110_ipack.c
@@ -182,7 +182,7 @@ int av7110_ipack_instant_repack (const u8 *buf, int count, struct ipack *p)
 			case DSM_CC_STREAM  :
 			case ISO13522_STREAM:
 				p->done = 1;
-				/* fall through */
+				fallthrough;
 			case PRIVATE_STREAM1:
 			case VIDEO_STREAM_S ... VIDEO_STREAM_E:
 			case AUDIO_STREAM_S ... AUDIO_STREAM_E:
diff --git a/drivers/media/pci/ttpci/budget-av.c b/drivers/media/pci/ttpci/budget-av.c
index 38cac508bd728..3cb83005cf09b 100644
--- a/drivers/media/pci/ttpci/budget-av.c
+++ b/drivers/media/pci/ttpci/budget-av.c
@@ -1226,7 +1226,7 @@ static void frontend_init(struct budget_av *budget_av)
 		 * but so far it has been only confirmed for this type
 		 */
 		budget_av->reinitialise_demod = 1;
-		/* fall through */
+		fallthrough;
 	case SUBID_DVBS_KNC1_PLUS:
 	case SUBID_DVBS_EASYWATCH_1:
 		if (saa->pci->subsystem_vendor == 0x1894) {
diff --git a/drivers/media/pci/ttpci/budget.c b/drivers/media/pci/ttpci/budget.c
index 9c811272abfe7..a88711a3ac7fd 100644
--- a/drivers/media/pci/ttpci/budget.c
+++ b/drivers/media/pci/ttpci/budget.c
@@ -613,7 +613,7 @@ static void frontend_init(struct budget *budget)
 			break;
 		}
 	}
-	/* fall through */
+		fallthrough;
 	case 0x1018: // TT Budget-S-1401 (philips tda10086/philips tda8262)
 	{
 		struct dvb_frontend *fe;
@@ -638,7 +638,7 @@ static void frontend_init(struct budget *budget)
 			break;
 		}
 	}
-	/* fall through */
+		fallthrough;
 
 	case 0x101c: { /* TT S2-1600 */
 			const struct stv6110x_devctl *ctl;
diff --git a/drivers/media/platform/sh_vou.c b/drivers/media/platform/sh_vou.c
index 36e5f2ff4ef1d..b22dc1d725276 100644
--- a/drivers/media/platform/sh_vou.c
+++ b/drivers/media/platform/sh_vou.c
@@ -220,7 +220,7 @@ static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
 		break;
 	case V4L2_PIX_FMT_RGB565:
 		dataswap ^= 1;
-		/* fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_RGB565X:
 		row_coeff = 2;
 		break;
@@ -802,7 +802,7 @@ static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
 	default:
 		pr_warn("%s(): Invalid bus-format code %d, using default 8-bit\n",
 			__func__, bus_fmt);
-		/* fall through */
+		fallthrough;
 	case SH_VOU_BUS_8BIT:
 		return 1;
 	case SH_VOU_BUS_16BIT:
diff --git a/drivers/media/radio/radio-si476x.c b/drivers/media/radio/radio-si476x.c
index b203296de9779..7e24602638829 100644
--- a/drivers/media/radio/radio-si476x.c
+++ b/drivers/media/radio/radio-si476x.c
@@ -105,7 +105,8 @@ static inline enum phase_diversity_modes_idx
 si476x_phase_diversity_mode_to_idx(enum si476x_phase_diversity_mode mode)
 {
 	switch (mode) {
-	default:		/* FALLTHROUGH */
+	default:
+		fallthrough;
 	case SI476X_PHDIV_DISABLED:
 		return SI476X_IDX_PHDIV_DISABLED;
 	case SI476X_PHDIV_PRIMARY_COMBINING:
diff --git a/drivers/media/radio/tea575x.c b/drivers/media/radio/tea575x.c
index b0303cf003879..c37315226c427 100644
--- a/drivers/media/radio/tea575x.c
+++ b/drivers/media/radio/tea575x.c
@@ -249,7 +249,7 @@ int snd_tea575x_enum_freq_bands(struct snd_tea575x *tea,
 			index = BAND_AM;
 			break;
 		}
-		/* Fall through */
+		fallthrough;
 	default:
 		return -EINVAL;
 	}
diff --git a/drivers/media/rc/bpf-lirc.c b/drivers/media/rc/bpf-lirc.c
index 5bb144435c160..3fe3edd808765 100644
--- a/drivers/media/rc/bpf-lirc.c
+++ b/drivers/media/rc/bpf-lirc.c
@@ -112,7 +112,7 @@ lirc_mode2_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
 	case BPF_FUNC_trace_printk:
 		if (perfmon_capable())
 			return bpf_get_trace_printk_proto();
-		/* fall through */
+		fallthrough;
 	default:
 		return NULL;
 	}
diff --git a/drivers/media/rc/ir-rc6-decoder.c b/drivers/media/rc/ir-rc6-decoder.c
index 95727ca910f71..0cda78f72fd80 100644
--- a/drivers/media/rc/ir-rc6-decoder.c
+++ b/drivers/media/rc/ir-rc6-decoder.c
@@ -64,7 +64,7 @@ static enum rc6_mode rc6_mode(struct rc6_dec *data)
 	case 6:
 		if (!data->toggle)
 			return RC6_MODE_6A;
-		/* fall through */
+		fallthrough;
 	default:
 		return RC6_MODE_UNKNOWN;
 	}
diff --git a/drivers/media/rc/ir-sony-decoder.c b/drivers/media/rc/ir-sony-decoder.c
index 9fa58d92eb097..7d9a7c000c75a 100644
--- a/drivers/media/rc/ir-sony-decoder.c
+++ b/drivers/media/rc/ir-sony-decoder.c
@@ -102,7 +102,7 @@ static int ir_sony_decode(struct rc_dev *dev, struct ir_raw_event ev)
 		}
 
 		data->state = STATE_FINISHED;
-		/* Fall through */
+		fallthrough;
 
 	case STATE_FINISHED:
 		if (ev.pulse)
diff --git a/drivers/media/tuners/xc5000.c b/drivers/media/tuners/xc5000.c
index 734a92caad8d0..7b7d9fe4f9453 100644
--- a/drivers/media/tuners/xc5000.c
+++ b/drivers/media/tuners/xc5000.c
@@ -756,7 +756,7 @@ static int xc5000_set_digital_params(struct dvb_frontend *fe)
 		if (!bw)
 			bw = 6000000;
 		/* fall to OFDM handling */
-		/* fall through */
+		fallthrough;
 	case SYS_DMBTH:
 	case SYS_DVBT:
 	case SYS_DVBT2:
diff --git a/drivers/media/usb/b2c2/flexcop-usb.c b/drivers/media/usb/b2c2/flexcop-usb.c
index 198ddfb8d2b18..e3234d1690655 100644
--- a/drivers/media/usb/b2c2/flexcop-usb.c
+++ b/drivers/media/usb/b2c2/flexcop-usb.c
@@ -525,7 +525,7 @@ static int flexcop_usb_init(struct flexcop_usb *fc_usb)
 	case USB_SPEED_HIGH:
 		info("running at HIGH speed.");
 		break;
-	case USB_SPEED_UNKNOWN: /* fall through */
+	case USB_SPEED_UNKNOWN:
 	default:
 		err("cannot handle USB speed because it is unknown.");
 		return -ENODEV;
diff --git a/drivers/media/usb/cpia2/cpia2_core.c b/drivers/media/usb/cpia2/cpia2_core.c
index 20c50c2d042e6..e747548ab2869 100644
--- a/drivers/media/usb/cpia2/cpia2_core.c
+++ b/drivers/media/usb/cpia2/cpia2_core.c
@@ -165,7 +165,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_VP_BRIGHTNESS:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_VP_BRIGHTNESS:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -176,7 +176,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_CONTRAST:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_CONTRAST:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -184,7 +184,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_VP_SATURATION:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_VP_SATURATION:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -195,7 +195,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_VP_GPIO_DATA:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_VP_GPIO_DATA:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -203,7 +203,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_VP_GPIO_DIRECTION:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_VP_GPIO_DIRECTION:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -211,7 +211,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_VC_MP_GPIO_DATA:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_VC_MP_GPIO_DATA:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC;
 		cmd.reg_count = 1;
@@ -219,7 +219,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_VC_MP_GPIO_DIRECTION:
 		cmd.buffer.block_data[0] = param;
-		/*fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_VC_MP_GPIO_DIRECTION:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC;
 		cmd.reg_count = 1;
@@ -234,7 +234,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_FLICKER_MODES:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_FLICKER_MODES:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -281,7 +281,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_USER_MODE:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_USER_MODE:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -301,7 +301,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_WAKEUP:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_WAKEUP:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC;
 		cmd.reg_count = 1;
@@ -309,7 +309,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_PW_CONTROL:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_PW_CONTROL:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC;
 		cmd.reg_count = 1;
@@ -322,7 +322,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_SYSTEM_CTRL:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_SYSTEM_CTRL:
 		cmd.req_mode =
 		    CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_SYSTEM;
@@ -331,7 +331,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_VP_SYSTEM_CTRL:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_VP_SYSTEM_CTRL:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -339,7 +339,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_VP_EXP_MODES:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_VP_EXP_MODES:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -347,7 +347,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_DEVICE_CONFIG:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_DEVICE_CONFIG:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -368,7 +368,7 @@ int cpia2_do_command(struct camera_data *cam,
 		break;
 	case CPIA2_CMD_SET_VC_CONTROL:
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_VC_CONTROL:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VC;
 		cmd.reg_count = 1;
@@ -403,7 +403,7 @@ int cpia2_do_command(struct camera_data *cam,
 					     this register can also affect
 					     flicker modes */
 		cmd.buffer.block_data[0] = param;
-		/* fall through */
+		fallthrough;
 	case CPIA2_CMD_GET_USER_EFFECTS:
 		cmd.req_mode = CAMERAACCESS_TYPE_BLOCK | CAMERAACCESS_VP;
 		cmd.reg_count = 1;
@@ -1751,7 +1751,7 @@ int cpia2_set_fps(struct camera_data *cam, int framerate)
 						    CPIA2_VP_SENSOR_FLAGS_500) {
 				return -EINVAL;
 			}
-			/* Fall through */
+			fallthrough;
 		case CPIA2_VP_FRAMERATE_15:
 		case CPIA2_VP_FRAMERATE_12_5:
 		case CPIA2_VP_FRAMERATE_7_5:
diff --git a/drivers/media/usb/cx231xx/cx231xx-video.c b/drivers/media/usb/cx231xx/cx231xx-video.c
index d9f953f2d0882..425e470b0fd35 100644
--- a/drivers/media/usb/cx231xx/cx231xx-video.c
+++ b/drivers/media/usb/cx231xx/cx231xx-video.c
@@ -996,7 +996,7 @@ void cx231xx_v4l2_create_entities(struct cx231xx *dev)
 			/* The DVB core will handle it */
 			if (dev->tuner_type == TUNER_ABSENT)
 				continue;
-			/* fall through */
+			fallthrough;
 		default: /* just to shut up a gcc warning */
 			ent->function = MEDIA_ENT_F_CONN_RF;
 			break;
diff --git a/drivers/media/usb/dvb-usb/dib0700_devices.c b/drivers/media/usb/dvb-usb/dib0700_devices.c
index 4ef3fa98d20f4..a6ae46567a313 100644
--- a/drivers/media/usb/dvb-usb/dib0700_devices.c
+++ b/drivers/media/usb/dvb-usb/dib0700_devices.c
@@ -1660,7 +1660,7 @@ static int dib8096_set_param_override(struct dvb_frontend *fe)
 	switch (band) {
 	default:
 			deb_info("Warning : Rf frequency  (%iHz) is not in the supported range, using VHF switch ", fe->dtv_property_cache.frequency);
-			/* fall through */
+		fallthrough;
 	case BAND_VHF:
 			state->dib8000_ops.set_gpio(fe, 3, 0, 1);
 			break;
diff --git a/drivers/media/usb/dvb-usb/dw2102.c b/drivers/media/usb/dvb-usb/dw2102.c
index f96626fe2c0b7..a27a684403252 100644
--- a/drivers/media/usb/dvb-usb/dw2102.c
+++ b/drivers/media/usb/dvb-usb/dw2102.c
@@ -1886,12 +1886,12 @@ static int dw2102_load_firmware(struct usb_device *dev,
 		switch (le16_to_cpu(dev->descriptor.idProduct)) {
 		case USB_PID_TEVII_S650:
 			dw2104_properties.rc.core.rc_codes = RC_MAP_TEVII_NEC;
-			/* fall through */
+			fallthrough;
 		case USB_PID_DW2104:
 			reset = 1;
 			dw210x_op_rw(dev, 0xc4, 0x0000, 0, &reset, 1,
 					DW210X_WRITE_MSG);
-			/* fall through */
+			fallthrough;
 		case USB_PID_DW3101:
 			reset = 0;
 			dw210x_op_rw(dev, 0xbf, 0x0040, 0, &reset, 0,
@@ -1924,7 +1924,7 @@ static int dw2102_load_firmware(struct usb_device *dev,
 					break;
 				}
 			}
-			/* fall through */
+			fallthrough;
 		case 0x2101:
 			dw210x_op_rw(dev, 0xbc, 0x0030, 0, &reset16[0], 2,
 					DW210X_READ_MSG);
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 3f3fbcd60cc62..45a2403aa039b 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -2200,7 +2200,7 @@ static int check_range(enum v4l2_ctrl_type type,
 	case V4L2_CTRL_TYPE_BOOLEAN:
 		if (step != 1 || max > 1 || min < 0)
 			return -ERANGE;
-		/* fall through */
+		fallthrough;
 	case V4L2_CTRL_TYPE_U8:
 	case V4L2_CTRL_TYPE_U16:
 	case V4L2_CTRL_TYPE_U32:
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index a556880f225a5..2a22e13a63034 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -782,7 +782,6 @@ static void v4l_print_frmsizeenum(const void *arg, bool write_only)
 				p->stepwise.step_height);
 		break;
 	case V4L2_FRMSIZE_TYPE_CONTINUOUS:
-		/* fall through */
 	default:
 		pr_cont("\n");
 		break;
@@ -816,7 +815,6 @@ static void v4l_print_frmivalenum(const void *arg, bool write_only)
 				p->stepwise.step.denominator);
 		break;
 	case V4L2_FRMIVAL_TYPE_CONTINUOUS:
-		/* fall through */
 	default:
 		pr_cont("\n");
 		break;
diff --git a/drivers/media/v4l2-core/videobuf-core.c b/drivers/media/v4l2-core/videobuf-core.c
index 5c91fc3e65b50..606a271bdd2dd 100644
--- a/drivers/media/v4l2-core/videobuf-core.c
+++ b/drivers/media/v4l2-core/videobuf-core.c
@@ -354,7 +354,7 @@ static void videobuf_status(struct videobuf_queue *q, struct v4l2_buffer *b,
 		break;
 	case VIDEOBUF_ERROR:
 		b->flags |= V4L2_BUF_FLAG_ERROR;
-		/* fall through */
+		fallthrough;
 	case VIDEOBUF_DONE:
 		b->flags |= V4L2_BUF_FLAG_DONE;
 		break;
diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
index f512cbc7a36c5..ca0097664b125 100644
--- a/drivers/memory/omap-gpmc.c
+++ b/drivers/memory/omap-gpmc.c
@@ -313,7 +313,6 @@ static unsigned long gpmc_get_clk_period(int cs, enum gpmc_clk_domain cd)
 		tick_ps *= div;
 		break;
 	case GPMC_CD_FCLK:
-		/* FALL-THROUGH */
 	default:
 		break;
 	}
diff --git a/drivers/memstick/core/ms_block.c b/drivers/memstick/core/ms_block.c
index d9ee8e3dc72da..178954228631d 100644
--- a/drivers/memstick/core/ms_block.c
+++ b/drivers/memstick/core/ms_block.c
@@ -371,7 +371,7 @@ static int h_msb_read_page(struct memstick_dev *card,
 			serial mode), then just fall through */
 		if (msb_read_int_reg(msb, -1))
 			return 0;
-		/* fallthrough */
+		fallthrough;
 
 	case MSB_RP_RECEIVE_INT_REQ_RESULT:
 		intreg = mrq->data[0];
@@ -403,7 +403,7 @@ static int h_msb_read_page(struct memstick_dev *card,
 	case MSB_RP_RECEIVE_STATUS_REG:
 		msb->regs.status = *(struct ms_status_register *)mrq->data;
 		msb->state = MSB_RP_SEND_OOB_READ;
-		/* fallthrough */
+		fallthrough;
 
 	case MSB_RP_SEND_OOB_READ:
 		if (!msb_read_regs(msb,
@@ -418,7 +418,7 @@ static int h_msb_read_page(struct memstick_dev *card,
 		msb->regs.extra_data =
 			*(struct ms_extra_data_register *) mrq->data;
 		msb->state = MSB_RP_SEND_READ_DATA;
-		/* fallthrough */
+		fallthrough;
 
 	case MSB_RP_SEND_READ_DATA:
 		/* Skip that state if we only read the oob */
@@ -518,7 +518,7 @@ static int h_msb_write_block(struct memstick_dev *card,
 		msb->state = MSB_WB_RECEIVE_INT_REQ;
 		if (msb_read_int_reg(msb, -1))
 			return 0;
-		/* fallthrough */
+		fallthrough;
 
 	case MSB_WB_RECEIVE_INT_REQ:
 		intreg = mrq->data[0];
@@ -549,7 +549,7 @@ static int h_msb_write_block(struct memstick_dev *card,
 
 		msb->int_polling = false;
 		msb->state = MSB_WB_SEND_WRITE_DATA;
-		/* fallthrough */
+		fallthrough;
 
 	case MSB_WB_SEND_WRITE_DATA:
 		sg_init_table(sg, ARRAY_SIZE(sg));
@@ -628,7 +628,7 @@ static int h_msb_send_command(struct memstick_dev *card,
 		msb->state = MSB_SC_RECEIVE_INT_REQ;
 		if (msb_read_int_reg(msb, -1))
 			return 0;
-		/* fallthrough */
+		fallthrough;
 
 	case MSB_SC_RECEIVE_INT_REQ:
 		intreg = mrq->data[0];
diff --git a/drivers/memstick/host/jmb38x_ms.c b/drivers/memstick/host/jmb38x_ms.c
index 4a6b866b0291c..e83c3ada9389e 100644
--- a/drivers/memstick/host/jmb38x_ms.c
+++ b/drivers/memstick/host/jmb38x_ms.c
@@ -255,11 +255,11 @@ static unsigned int jmb38x_ms_write_data(struct jmb38x_ms_host *host,
 	case 3:
 		host->io_word[0] |= buf[off + 2] << 16;
 		host->io_pos++;
-		/* fall through */
+		fallthrough;
 	case 2:
 		host->io_word[0] |= buf[off + 1] << 8;
 		host->io_pos++;
-		/* fall through */
+		fallthrough;
 	case 1:
 		host->io_word[0] |= buf[off];
 		host->io_pos++;
diff --git a/drivers/memstick/host/tifm_ms.c b/drivers/memstick/host/tifm_ms.c
index fc35c74044298..786e46798da24 100644
--- a/drivers/memstick/host/tifm_ms.c
+++ b/drivers/memstick/host/tifm_ms.c
@@ -162,11 +162,11 @@ static unsigned int tifm_ms_write_data(struct tifm_ms *host,
 	case 3:
 		host->io_word |= buf[off + 2] << 16;
 		host->io_pos++;
-		/* fall through */
+		fallthrough;
 	case 2:
 		host->io_word |= buf[off + 1] << 8;
 		host->io_pos++;
-		/* fall through */
+		fallthrough;
 	case 1:
 		host->io_word |= buf[off];
 		host->io_pos++;
diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 5216487db4fbe..9903e9660a38d 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -642,7 +642,7 @@ mptbase_reply(MPT_ADAPTER *ioc, MPT_FRAME_HDR *req, MPT_FRAME_HDR *reply)
 			freereq = 0;
 		if (event != MPI_EVENT_EVENT_CHANGE)
 			break;
-		/* fall through */
+		fallthrough;
 	case MPI_FUNCTION_CONFIG:
 	case MPI_FUNCTION_SAS_IO_UNIT_CONTROL:
 		ioc->mptbase_cmds.status |= MPT_MGMT_STATUS_COMMAND_GOOD;
@@ -1887,7 +1887,7 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
 	case MPI_MANUFACTPAGE_DEVICEID_FC939X:
 	case MPI_MANUFACTPAGE_DEVICEID_FC949X:
 		ioc->errata_flag_1064 = 1;
-		/* fall through */
+		fallthrough;
 	case MPI_MANUFACTPAGE_DEVICEID_FC909:
 	case MPI_MANUFACTPAGE_DEVICEID_FC929:
 	case MPI_MANUFACTPAGE_DEVICEID_FC919:
@@ -1932,7 +1932,7 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
 			pcixcmd &= 0x8F;
 			pci_write_config_byte(pdev, 0x6a, pcixcmd);
 		}
-		/* fall through */
+		fallthrough;
 
 	case MPI_MANUFACTPAGE_DEVID_1030_53C1035:
 		ioc->bus_type = SPI;
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index 6a79cd0ebe2b0..18b91ea1a353f 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -4326,7 +4326,7 @@ mptsas_hotplug_work(MPT_ADAPTER *ioc, struct fw_event_work *fw_event,
 			}
 		}
 		mpt_findImVolumes(ioc);
-		/* fall through */
+		fallthrough;
 
 	case MPTSAS_ADD_DEVICE:
 		memset(&sas_device, 0, sizeof(struct mptsas_devinfo));
diff --git a/drivers/message/fusion/mptscsih.c b/drivers/message/fusion/mptscsih.c
index 1491561d2e5c9..8543f0324d5a8 100644
--- a/drivers/message/fusion/mptscsih.c
+++ b/drivers/message/fusion/mptscsih.c
@@ -784,7 +784,7 @@ mptscsih_io_done(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *mr)
 			/*
 			 * Allow non-SAS & non-NEXUS_LOSS to drop into below code
 			 */
-			/* Fall through */
+			fallthrough;
 
 		case MPI_IOCSTATUS_SCSI_TASK_TERMINATED:	/* 0x0048 */
 			/* Linux handles an unsolicited DID_RESET better
@@ -881,7 +881,7 @@ mptscsih_io_done(MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf, MPT_FRAME_HDR *mr)
 
 		case MPI_IOCSTATUS_SCSI_DATA_OVERRUN:		/* 0x0044 */
 			scsi_set_resid(sc, 0);
-			/* Fall through */
+			fallthrough;
 		case MPI_IOCSTATUS_SCSI_RECOVERED_ERROR:	/* 0x0040 */
 		case MPI_IOCSTATUS_SUCCESS:			/* 0x0000 */
 			sc->result = (DID_OK << 16) | scsi_status;
diff --git a/drivers/mfd/db8500-prcmu.c b/drivers/mfd/db8500-prcmu.c
index a9d9c1cdf546b..a5983d515db03 100644
--- a/drivers/mfd/db8500-prcmu.c
+++ b/drivers/mfd/db8500-prcmu.c
@@ -1515,10 +1515,10 @@ static unsigned long dsiclk_rate(u8 n)
 	switch (divsel) {
 	case PRCM_DSI_PLLOUT_SEL_PHI_4:
 		div *= 2;
-		/* Fall through */
+		fallthrough;
 	case PRCM_DSI_PLLOUT_SEL_PHI_2:
 		div *= 2;
-		/* Fall through */
+		fallthrough;
 	case PRCM_DSI_PLLOUT_SEL_PHI:
 		return pll_rate(PRCM_PLLDSI_FREQ, clock_rate(PRCMU_HDMICLK),
 			PLL_RAW) / div;
diff --git a/drivers/mfd/iqs62x.c b/drivers/mfd/iqs62x.c
index af764bc87d7ce..761b4ef3a3810 100644
--- a/drivers/mfd/iqs62x.c
+++ b/drivers/mfd/iqs62x.c
@@ -136,7 +136,7 @@ static int iqs62x_dev_init(struct iqs62x_core *iqs62x)
 		if (val & IQS620_PROX_SETTINGS_4_SAR_EN)
 			iqs62x->ui_sel = IQS62X_UI_SAR1;
 
-		/* fall through */
+		fallthrough;
 
 	case IQS621_PROD_NUM:
 		ret = regmap_write(iqs62x->regmap, IQS620_GLBL_EVENT_MASK,
@@ -470,7 +470,7 @@ static irqreturn_t iqs62x_irq(int irq, void *context)
 		case IQS62X_EVENT_UI_LO:
 			event_data.ui_data = get_unaligned_le16(&event_map[i]);
 
-			/* fall through */
+			fallthrough;
 
 		case IQS62X_EVENT_UI_HI:
 		case IQS62X_EVENT_NONE:
@@ -491,7 +491,7 @@ static irqreturn_t iqs62x_irq(int irq, void *context)
 		case IQS62X_EVENT_HYST:
 			event_map[i] <<= iqs62x->dev_desc->hyst_shift;
 
-			/* fall through */
+			fallthrough;
 
 		case IQS62X_EVENT_WHEEL:
 		case IQS62X_EVENT_HALL:
diff --git a/drivers/mfd/mxs-lradc.c b/drivers/mfd/mxs-lradc.c
index 5bef142c48356..111d11fd25aad 100644
--- a/drivers/mfd/mxs-lradc.c
+++ b/drivers/mfd/mxs-lradc.c
@@ -172,7 +172,7 @@ static int mxs_lradc_probe(struct platform_device *pdev)
 					MXS_LRADC_TOUCHSCREEN_5WIRE;
 				break;
 			}
-			/* fall through - to an error message for i.MX23 */
+			fallthrough;	/* to an error message for i.MX23 */
 		default:
 			dev_err(&pdev->dev,
 				"Unsupported number of touchscreen wires (%d)\n"
diff --git a/drivers/mfd/omap-usb-host.c b/drivers/mfd/omap-usb-host.c
index 1e6431cb85360..2a3a240b4619a 100644
--- a/drivers/mfd/omap-usb-host.c
+++ b/drivers/mfd/omap-usb-host.c
@@ -308,7 +308,7 @@ static int usbhs_runtime_resume(struct device *dev)
 					 i, r);
 				}
 			}
-		/* Fall through - as HSIC mode needs utmi_clk */
+			fallthrough;	/* as HSIC mode needs utmi_clk */
 
 		case OMAP_EHCI_PORT_MODE_TLL:
 			if (!IS_ERR(omap->utmi_clk[i])) {
@@ -344,7 +344,7 @@ static int usbhs_runtime_suspend(struct device *dev)
 
 			if (!IS_ERR(omap->hsic480m_clk[i]))
 				clk_disable_unprepare(omap->hsic480m_clk[i]);
-		/* Fall through - as utmi_clks were used in HSIC mode */
+			fallthrough;	/* as utmi_clks were used in HSIC mode */
 
 		case OMAP_EHCI_PORT_MODE_TLL:
 			if (!IS_ERR(omap->utmi_clk[i]))
diff --git a/drivers/mfd/rave-sp.c b/drivers/mfd/rave-sp.c
index abaab541df19d..545196c85b5ca 100644
--- a/drivers/mfd/rave-sp.c
+++ b/drivers/mfd/rave-sp.c
@@ -270,7 +270,7 @@ static void *stuff(unsigned char *dest, const unsigned char *src, size_t n)
 		case RAVE_SP_ETX:
 		case RAVE_SP_DLE:
 			*dest++ = RAVE_SP_DLE;
-			/* FALLTHROUGH */
+			fallthrough;
 		default:
 			*dest++ = byte;
 		}
@@ -541,7 +541,7 @@ static int rave_sp_receive_buf(struct serdev_device *serdev,
 			 * deframer buffer
 			 */
 
-			/* FALLTHROUGH */
+			fallthrough;
 
 		case RAVE_SP_EXPECT_ESCAPED_DATA:
 			if (deframer->length == sizeof(deframer->data)) {
diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
index 75859e4929841..df5cebb372a59 100644
--- a/drivers/mfd/syscon.c
+++ b/drivers/mfd/syscon.c
@@ -95,7 +95,7 @@ static struct syscon *of_syscon_register(struct device_node *np, bool check_clk)
 			break;
 		default:
 			pr_err("Failed to retrieve valid hwlock: %d\n", ret);
-			/* fall-through */
+			fallthrough;
 		case -EPROBE_DEFER:
 			goto err_regmap;
 		}
diff --git a/drivers/misc/eeprom/at25.c b/drivers/misc/eeprom/at25.c
index cde9a2fc13250..ed8d38b099251 100644
--- a/drivers/misc/eeprom/at25.c
+++ b/drivers/misc/eeprom/at25.c
@@ -90,10 +90,10 @@ static int at25_ee_read(void *priv, unsigned int offset,
 	switch (at25->addrlen) {
 	default:	/* case 3 */
 		*cp++ = offset >> 16;
-		/* fall through */
+		fallthrough;
 	case 2:
 		*cp++ = offset >> 8;
-		/* fall through */
+		fallthrough;
 	case 1:
 	case 0:	/* can't happen: for better codegen */
 		*cp++ = offset >> 0;
@@ -178,10 +178,10 @@ static int at25_ee_write(void *priv, unsigned int off, void *val, size_t count)
 		switch (at25->addrlen) {
 		default:	/* case 3 */
 			*cp++ = offset >> 16;
-			/* fall through */
+			fallthrough;
 		case 2:
 			*cp++ = offset >> 8;
-			/* fall through */
+			fallthrough;
 		case 1:
 		case 0:	/* can't happen: for better codegen */
 			*cp++ = offset >> 0;
@@ -278,7 +278,7 @@ static int at25_fw_to_chip(struct device *dev, struct spi_eeprom *chip)
 		switch (val) {
 		case 9:
 			chip->flags |= EE_INSTR_BIT3_IS_ADDR;
-			/* fall through */
+			fallthrough;
 		case 8:
 			chip->flags |= EE_ADDR1;
 			break;
diff --git a/drivers/misc/mic/scif/scif_api.c b/drivers/misc/mic/scif/scif_api.c
index 9cc6b2a6cf229..304d6c833712a 100644
--- a/drivers/misc/mic/scif/scif_api.c
+++ b/drivers/misc/mic/scif/scif_api.c
@@ -178,7 +178,7 @@ int scif_close(scif_epd_t epd)
 	case SCIFEP_ZOMBIE:
 		dev_err(scif_info.mdev.this_device,
 			"SCIFAPI close: zombie state unexpected\n");
-		/* fall through */
+		fallthrough;
 	case SCIFEP_DISCONNECTED:
 		spin_unlock(&ep->lock);
 		scif_unregister_all_windows(epd);
@@ -645,7 +645,7 @@ int __scif_connect(scif_epd_t epd, struct scif_port_id *dst, bool non_block)
 		ep->port.port = err;
 		ep->port.node = scif_info.nodeid;
 		ep->conn_async_state = ASYNC_CONN_IDLE;
-		/* Fall through */
+		fallthrough;
 	case SCIFEP_BOUND:
 		/*
 		 * If a non-blocking connect has been already initiated
diff --git a/drivers/misc/mic/scif/scif_rma.c b/drivers/misc/mic/scif/scif_rma.c
index de8f61efaef5c..2da3b474f4863 100644
--- a/drivers/misc/mic/scif/scif_rma.c
+++ b/drivers/misc/mic/scif/scif_rma.c
@@ -657,7 +657,7 @@ int scif_unregister_window(struct scif_window *window)
 		window->unreg_state = OP_IN_PROGRESS;
 		send_msg = true;
 	}
-		/* fall through */
+		fallthrough;
 	case OP_IN_PROGRESS:
 	{
 		scif_get_window(window, 1);
diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c
index f6e600bfac5d2..0ea923fe6371b 100644
--- a/drivers/misc/sgi-gru/grukservices.c
+++ b/drivers/misc/sgi-gru/grukservices.c
@@ -622,7 +622,7 @@ static int send_noop_message(void *cb, struct gru_message_queue_desc *mqd,
 			break;
 		case CBSS_PAGE_OVERFLOW:
 			STAT(mesq_noop_page_overflow);
-			/* fall through */
+			fallthrough;
 		default:
 			BUG();
 		}
@@ -780,7 +780,7 @@ static int send_message_failure(void *cb, struct gru_message_queue_desc *mqd,
 		break;
 	case CBSS_PAGE_OVERFLOW:
 		STAT(mesq_page_overflow);
-		/* fall through */
+		fallthrough;
 	default:
 		BUG();
 	}
diff --git a/drivers/misc/sgi-xp/xpc_main.c b/drivers/misc/sgi-xp/xpc_main.c
index d5e097cd556db..8a495dc82f167 100644
--- a/drivers/misc/sgi-xp/xpc_main.c
+++ b/drivers/misc/sgi-xp/xpc_main.c
@@ -1173,7 +1173,7 @@ xpc_system_die(struct notifier_block *nb, unsigned long event, void *_die_args)
 		if (!xpc_kdebug_ignore)
 			break;
 
-		/* fall through */
+		fallthrough;
 	case DIE_MCA_MONARCH_ENTER:
 	case DIE_INIT_MONARCH_ENTER:
 		xpc_arch_ops.offline_heartbeat();
@@ -1184,7 +1184,7 @@ xpc_system_die(struct notifier_block *nb, unsigned long event, void *_die_args)
 		if (!xpc_kdebug_ignore)
 			break;
 
-		/* fall through */
+		fallthrough;
 	case DIE_MCA_MONARCH_LEAVE:
 	case DIE_INIT_MONARCH_LEAVE:
 		xpc_arch_ops.online_heartbeat();
diff --git a/drivers/misc/sgi-xp/xpc_partition.c b/drivers/misc/sgi-xp/xpc_partition.c
index 21a04bc97d40a..099a53bdbb7d8 100644
--- a/drivers/misc/sgi-xp/xpc_partition.c
+++ b/drivers/misc/sgi-xp/xpc_partition.c
@@ -441,10 +441,10 @@ xpc_discovery(void)
 		switch (region_size) {
 		case 128:
 			max_regions *= 2;
-			/* fall through */
+			fallthrough;
 		case 64:
 			max_regions *= 2;
-			/* fall through */
+			fallthrough;
 		case 32:
 			max_regions *= 2;
 			region_size = 16;
diff --git a/drivers/misc/sgi-xp/xpc_uv.c b/drivers/misc/sgi-xp/xpc_uv.c
index 98c60f11b76b1..7791bde81a368 100644
--- a/drivers/misc/sgi-xp/xpc_uv.c
+++ b/drivers/misc/sgi-xp/xpc_uv.c
@@ -574,7 +574,7 @@ xpc_handle_activate_mq_msg_uv(struct xpc_partition *part,
 
 		xpc_wakeup_channel_mgr(part);
 	}
-		/* fall through */
+		fallthrough;
 	case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV:
 		spin_lock_irqsave(&part_uv->flags_lock, irq_flags);
 		part_uv->flags |= XPC_P_ENGAGED_UV;
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
index ce43f7573d804..c8fae6611b73b 100644
--- a/drivers/mmc/core/host.c
+++ b/drivers/mmc/core/host.c
@@ -191,7 +191,7 @@ int mmc_of_parse(struct mmc_host *host)
 	switch (bus_width) {
 	case 8:
 		host->caps |= MMC_CAP_8_BIT_DATA;
-		/* fall through - Hosts capable of 8-bit can also do 4 bits */
+		fallthrough;	/* Hosts capable of 8-bit can also do 4 bits */
 	case 4:
 		host->caps |= MMC_CAP_4_BIT_DATA;
 		break;
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 300901415aa20..3fc3bbea8536e 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -2418,7 +2418,7 @@ static void atmci_get_cap(struct atmel_mci *host)
 	case 0x600:
 	case 0x500:
 		host->caps.has_odd_clk_div = 1;
-		/* Fall through */
+		fallthrough;
 	case 0x400:
 	case 0x300:
 		host->caps.has_dma_conf_reg = 1;
@@ -2426,16 +2426,16 @@ static void atmci_get_cap(struct atmel_mci *host)
 		host->caps.has_cfg_reg = 1;
 		host->caps.has_cstor_reg = 1;
 		host->caps.has_highspeed = 1;
-		/* Fall through */
+		fallthrough;
 	case 0x200:
 		host->caps.has_rwproof = 1;
 		host->caps.need_blksz_mul_4 = 0;
 		host->caps.need_notbusy_for_read_ops = 1;
-		/* Fall through */
+		fallthrough;
 	case 0x100:
 		host->caps.has_bad_data_ordering = 0;
 		host->caps.need_reset_after_xfer = 0;
-		/* Fall through */
+		fallthrough;
 	case 0x0:
 		break;
 	default:
diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c
index f01fecd75833d..e50a08bce7efa 100644
--- a/drivers/mmc/host/davinci_mmc.c
+++ b/drivers/mmc/host/davinci_mmc.c
@@ -300,7 +300,7 @@ static void mmc_davinci_start_command(struct mmc_davinci_host *host,
 		 * then it's harmless for us to allow it.
 		 */
 		cmd_reg |= MMCCMD_BSYEXP;
-		/* FALLTHROUGH */
+		fallthrough;
 	case MMC_RSP_R1:		/* 48 bits, CRC */
 		cmd_reg |= MMCCMD_RSPFMT_R1456;
 		break;
diff --git a/drivers/mmc/host/dw_mmc-k3.c b/drivers/mmc/host/dw_mmc-k3.c
index 50977ff180741..db1a84b2ba612 100644
--- a/drivers/mmc/host/dw_mmc-k3.c
+++ b/drivers/mmc/host/dw_mmc-k3.c
@@ -238,7 +238,7 @@ static void dw_mci_hs_set_timing(struct dw_mci *host, int timing,
 		if (smpl_phase >= USE_DLY_MIN_SMPL &&
 				smpl_phase <= USE_DLY_MAX_SMPL)
 			use_smpl_dly = 1;
-			/* fallthrough */
+		fallthrough;
 	case MMC_TIMING_UHS_SDR50:
 		if (smpl_phase >= ENABLE_SHIFT_MIN_SMPL &&
 				smpl_phase <= ENABLE_SHIFT_MAX_SMPL)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 35ae5737c6226..0fba940544ca1 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -2030,7 +2030,7 @@ static void dw_mci_tasklet_func(unsigned long priv)
 			}
 
 			prev_state = state = STATE_SENDING_DATA;
-			/* fall through */
+			fallthrough;
 
 		case STATE_SENDING_DATA:
 			/*
@@ -2088,7 +2088,7 @@ static void dw_mci_tasklet_func(unsigned long priv)
 			}
 			prev_state = state = STATE_DATA_BUSY;
 
-			/* fall through */
+			fallthrough;
 
 		case STATE_DATA_BUSY:
 			if (!dw_mci_clear_pending_data_complete(host)) {
@@ -2141,7 +2141,7 @@ static void dw_mci_tasklet_func(unsigned long priv)
 			 */
 			prev_state = state = STATE_SENDING_STOP;
 
-			/* fall through */
+			fallthrough;
 
 		case STATE_SENDING_STOP:
 			if (!dw_mci_clear_pending_cmd_complete(host))
diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c
index 447552ac25c4a..81d71010b4742 100644
--- a/drivers/mmc/host/jz4740_mmc.c
+++ b/drivers/mmc/host/jz4740_mmc.c
@@ -739,7 +739,7 @@ static irqreturn_t jz_mmc_irq_worker(int irq, void *devid)
 			break;
 
 		jz_mmc_prepare_data_transfer(host);
-		/* fall through */
+		fallthrough;
 
 	case JZ4740_MMC_STATE_TRANSFER_DATA:
 		if (host->use_dma) {
@@ -774,7 +774,7 @@ static irqreturn_t jz_mmc_irq_worker(int irq, void *devid)
 			break;
 		}
 		jz4740_mmc_write_irq_reg(host, JZ_MMC_IRQ_DATA_TRAN_DONE);
-		/* fall through */
+		fallthrough;
 
 	case JZ4740_MMC_STATE_SEND_STOP:
 		if (!req->stop)
diff --git a/drivers/mmc/host/meson-mx-sdio.c b/drivers/mmc/host/meson-mx-sdio.c
index 9b2cf7afc246f..703d5834f9a52 100644
--- a/drivers/mmc/host/meson-mx-sdio.c
+++ b/drivers/mmc/host/meson-mx-sdio.c
@@ -294,7 +294,7 @@ static void meson_mx_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 	switch (ios->power_mode) {
 	case MMC_POWER_OFF:
 		vdd = 0;
-		/* fall through */
+		fallthrough;
 	case MMC_POWER_UP:
 		if (!IS_ERR(mmc->supply.vmmc)) {
 			host->error = mmc_regulator_set_ocr(mmc,
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 15e21894bd44a..904f5237d8f7e 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -685,7 +685,7 @@ static int renesas_sdhi_write16_hook(struct tmio_mmc_host *host, int addr)
 	case HOST_MODE:
 		if (host->pdata->flags & TMIO_MMC_HAVE_CBSY)
 			bit = TMIO_STAT_CMD_BUSY;
-		/* fallthrough */
+		fallthrough;
 	case CTL_SD_CARD_CLK_CTL:
 		return renesas_sdhi_wait_idle(host, bit);
 	}
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index a76b4513fbec6..d738907a622f7 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -1556,7 +1556,7 @@ static int sdhci_esdhc_imx_probe_nondt(struct platform_device *pdev,
 				"failed to request card-detect gpio!\n");
 			return err;
 		}
-		/* fall through */
+		fallthrough;
 
 	case ESDHC_CD_CONTROLLER:
 		/* we have a working card_detect back */
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index 9194bb73e601b..080ced1e63f0a 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -609,7 +609,7 @@ static int sdhci_s3c_probe(struct platform_device *pdev)
 	switch (pdata->max_width) {
 	case 8:
 		host->mmc->caps |= MMC_CAP_8_BIT_DATA;
-		/* Fall through */
+		fallthrough;
 	case 4:
 		host->mmc->caps |= MMC_CAP_4_BIT_DATA;
 		break;
diff --git a/drivers/mmc/host/sdhci-sprd.c b/drivers/mmc/host/sdhci-sprd.c
index a910cb461ed7c..bafa2e41c8b63 100644
--- a/drivers/mmc/host/sdhci-sprd.c
+++ b/drivers/mmc/host/sdhci-sprd.c
@@ -470,7 +470,7 @@ static int sdhci_sprd_voltage_switch(struct mmc_host *mmc, struct mmc_ios *ios)
 		break;
 
 	default:
-		/* fall-through */
+		fallthrough;
 	case MMC_SIGNAL_VOLTAGE_330:
 		ret = pinctrl_select_state(sprd_host->pinctrl,
 					   sprd_host->pins_default);
diff --git a/drivers/mmc/host/sdhci-xenon-phy.c b/drivers/mmc/host/sdhci-xenon-phy.c
index e6e9e286cc348..03ce57ef45858 100644
--- a/drivers/mmc/host/sdhci-xenon-phy.c
+++ b/drivers/mmc/host/sdhci-xenon-phy.c
@@ -527,7 +527,7 @@ static bool xenon_emmc_phy_slow_mode(struct sdhci_host *host,
 			ret = true;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		reg &= ~XENON_TIMING_ADJUST_SLOW_MODE;
 		ret = false;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 3ad394b40eb18..592a55a34b58e 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -2825,7 +2825,7 @@ int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
 	case MMC_TIMING_UHS_SDR50:
 		if (host->flags & SDHCI_SDR50_NEEDS_TUNING)
 			break;
-		/* FALLTHROUGH */
+		fallthrough;
 
 	default:
 		goto out;
diff --git a/drivers/mmc/host/tifm_sd.c b/drivers/mmc/host/tifm_sd.c
index 5987656e0474c..fd8b72d3e02c9 100644
--- a/drivers/mmc/host/tifm_sd.c
+++ b/drivers/mmc/host/tifm_sd.c
@@ -335,7 +335,7 @@ static unsigned int tifm_sd_op_flags(struct mmc_command *cmd)
 		break;
 	case MMC_RSP_R1B:
 		rc |= TIFM_MMCSD_RSP_BUSY;
-		/* fall-through */
+		fallthrough;
 	case MMC_RSP_R1:
 		rc |= TIFM_MMCSD_RSP_R1;
 		break;
diff --git a/drivers/mmc/host/usdhi6rol0.c b/drivers/mmc/host/usdhi6rol0.c
index 369b8dee2e3d3..7666c90054ae9 100644
--- a/drivers/mmc/host/usdhi6rol0.c
+++ b/drivers/mmc/host/usdhi6rol0.c
@@ -1343,7 +1343,7 @@ static int usdhi6_stop_cmd(struct usdhi6_host *host)
 			host->wait = USDHI6_WAIT_FOR_STOP;
 			return 0;
 		}
-		/* fall through - Unsupported STOP command. */
+		fallthrough;	/* Unsupported STOP command */
 	default:
 		dev_err(mmc_dev(host->mmc),
 			"unsupported stop CMD%d for CMD%d\n",
@@ -1691,7 +1691,7 @@ static void usdhi6_timeout_work(struct work_struct *work)
 	switch (host->wait) {
 	default:
 		dev_err(mmc_dev(host->mmc), "Invalid state %u\n", host->wait);
-		/* fall through - mrq can be NULL, but is impossible. */
+		fallthrough;	/* mrq can be NULL, but is impossible */
 	case USDHI6_WAIT_FOR_CMD:
 		usdhi6_error_code(host);
 		if (mrq)
@@ -1713,7 +1713,7 @@ static void usdhi6_timeout_work(struct work_struct *work)
 			host->offset, data->blocks, data->blksz, data->sg_len,
 			sg_dma_len(sg), sg->offset);
 		usdhi6_sg_unmap(host, true);
-		/* fall through - page unmapped in USDHI6_WAIT_FOR_DATA_END. */
+		fallthrough;	/* page unmapped in USDHI6_WAIT_FOR_DATA_END */
 	case USDHI6_WAIT_FOR_DATA_END:
 		usdhi6_error_code(host);
 		data->error = -ETIMEDOUT;
diff --git a/drivers/mux/adgs1408.c b/drivers/mux/adgs1408.c
index 12466b06692c8..22ed051eb1a4a 100644
--- a/drivers/mux/adgs1408.c
+++ b/drivers/mux/adgs1408.c
@@ -93,7 +93,7 @@ static int adgs1408_probe(struct spi_device *spi)
 			mux->idle_state = idle_state;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		dev_err(dev, "invalid idle-state %d\n", idle_state);
 		return -EINVAL;
diff --git a/drivers/net/appletalk/cops.c b/drivers/net/appletalk/cops.c
index 18428e104445f..1c6c27f35ac4b 100644
--- a/drivers/net/appletalk/cops.c
+++ b/drivers/net/appletalk/cops.c
@@ -301,7 +301,7 @@ static int __init cops_probe1(struct net_device *dev, int ioaddr)
 			dev->irq = cops_irq(ioaddr, board);
 			if (dev->irq)
 				break;
-			/* fall through - Once no IRQ found on this port. */
+			fallthrough;	/* Once no IRQ found on this port */
 		case 1:
 			retval = -EINVAL;
 			goto err_out;
diff --git a/drivers/net/arcnet/arc-rimi.c b/drivers/net/arcnet/arc-rimi.c
index 14a5fb3781453..98df38fe553ce 100644
--- a/drivers/net/arcnet/arc-rimi.c
+++ b/drivers/net/arcnet/arc-rimi.c
@@ -363,13 +363,13 @@ static int __init arcrimi_setup(char *s)
 	switch (ints[0]) {
 	default:		/* ERROR */
 		pr_err("Too many arguments\n");
-		/* Fall through */
+		fallthrough;
 	case 3:		/* Node ID */
 		node = ints[3];
-		/* Fall through */
+		fallthrough;
 	case 2:		/* IRQ */
 		irq = ints[2];
-		/* Fall through */
+		fallthrough;
 	case 1:		/* IO address */
 		io = ints[1];
 	}
diff --git a/drivers/net/arcnet/com20020-isa.c b/drivers/net/arcnet/com20020-isa.c
index cd27fdc1059b9..f983c4ce6b07f 100644
--- a/drivers/net/arcnet/com20020-isa.c
+++ b/drivers/net/arcnet/com20020-isa.c
@@ -197,22 +197,22 @@ static int __init com20020isa_setup(char *s)
 	switch (ints[0]) {
 	default:		/* ERROR */
 		pr_info("Too many arguments\n");
-		/* Fall through */
+		fallthrough;
 	case 6:		/* Timeout */
 		timeout = ints[6];
-		/* Fall through */
+		fallthrough;
 	case 5:		/* CKP value */
 		clockp = ints[5];
-		/* Fall through */
+		fallthrough;
 	case 4:		/* Backplane flag */
 		backplane = ints[4];
-		/* Fall through */
+		fallthrough;
 	case 3:		/* Node ID */
 		node = ints[3];
-		/* Fall through */
+		fallthrough;
 	case 2:		/* IRQ */
 		irq = ints[2];
-		/* Fall through */
+		fallthrough;
 	case 1:		/* IO address */
 		io = ints[1];
 	}
diff --git a/drivers/net/arcnet/com90io.c b/drivers/net/arcnet/com90io.c
index 186bbf87bc849..cf214b7306715 100644
--- a/drivers/net/arcnet/com90io.c
+++ b/drivers/net/arcnet/com90io.c
@@ -363,10 +363,10 @@ static int __init com90io_setup(char *s)
 	switch (ints[0]) {
 	default:		/* ERROR */
 		pr_err("Too many arguments\n");
-		/* Fall through */
+		fallthrough;
 	case 2:		/* IRQ */
 		irq = ints[2];
-		/* Fall through */
+		fallthrough;
 	case 1:		/* IO address */
 		io = ints[1];
 	}
diff --git a/drivers/net/arcnet/com90xx.c b/drivers/net/arcnet/com90xx.c
index bd75d06ad7dfc..3dc3d533cb19a 100644
--- a/drivers/net/arcnet/com90xx.c
+++ b/drivers/net/arcnet/com90xx.c
@@ -693,13 +693,13 @@ static int __init com90xx_setup(char *s)
 	switch (ints[0]) {
 	default:		/* ERROR */
 		pr_err("Too many arguments\n");
-		/* Fall through */
+		fallthrough;
 	case 3:		/* Mem address */
 		shmem = ints[3];
-		/* Fall through */
+		fallthrough;
 	case 2:		/* IRQ */
 		irq = ints[2];
-		/* Fall through */
+		fallthrough;
 	case 1:		/* IO address */
 		io = ints[1];
 	}
diff --git a/drivers/net/bonding/bond_3ad.c b/drivers/net/bonding/bond_3ad.c
index cddaa43a9d527..aa001b16765ae 100644
--- a/drivers/net/bonding/bond_3ad.c
+++ b/drivers/net/bonding/bond_3ad.c
@@ -1149,7 +1149,7 @@ static void ad_rx_machine(struct lacpdu *lacpdu, struct port *port)
 			port->actor_oper_port_state &= ~LACP_STATE_EXPIRED;
 			port->sm_rx_state = AD_RX_PORT_DISABLED;
 
-			/* Fall Through */
+			fallthrough;
 		case AD_RX_PORT_DISABLED:
 			port->sm_vars &= ~AD_PORT_MATCHED;
 			break;
@@ -1588,7 +1588,7 @@ static struct aggregator *ad_agg_selection_test(struct aggregator *best,
 		if (__agg_active_ports(curr) < __agg_active_ports(best))
 			return best;
 
-		/*FALLTHROUGH*/
+		fallthrough;
 	case BOND_AD_STABLE:
 	case BOND_AD_BANDWIDTH:
 		if (__get_agg_bandwidth(curr) > __get_agg_bandwidth(best))
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index c5d3032dd1a21..42ef25ec0af5b 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -2274,7 +2274,7 @@ static int bond_miimon_inspect(struct bonding *bond)
 					     "active " : "backup ") : "",
 					   bond->params.downdelay * bond->params.miimon);
 			}
-			/*FALLTHRU*/
+			fallthrough;
 		case BOND_LINK_FAIL:
 			if (link_state) {
 				/* recovered before downdelay expired */
@@ -2310,7 +2310,7 @@ static int bond_miimon_inspect(struct bonding *bond)
 					   bond->params.updelay *
 					   bond->params.miimon);
 			}
-			/*FALLTHRU*/
+			fallthrough;
 		case BOND_LINK_BACK:
 			if (!link_state) {
 				bond_propose_link_state(slave, BOND_LINK_DOWN);
@@ -3322,7 +3322,7 @@ static int bond_slave_netdev_event(unsigned long event,
 
 		if (BOND_MODE(bond) == BOND_MODE_8023AD)
 			bond_3ad_adapter_speed_duplex_changed(slave);
-		/* Fallthrough */
+		fallthrough;
 	case NETDEV_DOWN:
 		/* Refresh slave-array if applicable!
 		 * If the setup does not use miimon or arpmon (mode-specific!),
@@ -3760,7 +3760,7 @@ static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd
 			return -EINVAL;
 
 		mii->phy_id = 0;
-		/* Fall Through */
+		fallthrough;
 	case SIOCGMIIREG:
 		/* We do this again just in case we were called by SIOCGMIIREG
 		 * instead of SIOCGMIIPHY.
diff --git a/drivers/net/can/at91_can.c b/drivers/net/can/at91_can.c
index 9df2007b5e56b..38e9f80ed1ef6 100644
--- a/drivers/net/can/at91_can.c
+++ b/drivers/net/can/at91_can.c
@@ -898,7 +898,7 @@ static void at91_irq_err_state(struct net_device *dev,
 				CAN_ERR_CRTL_TX_WARNING :
 				CAN_ERR_CRTL_RX_WARNING;
 		}
-		/* fall through */
+		fallthrough;
 	case CAN_STATE_ERROR_WARNING:
 		/*
 		 * from: ERROR_ACTIVE, ERROR_WARNING
@@ -948,7 +948,7 @@ static void at91_irq_err_state(struct net_device *dev,
 		netdev_dbg(dev, "Error Active\n");
 		cf->can_id |= CAN_ERR_PROT;
 		cf->data[2] = CAN_ERR_PROT_ACTIVE;
-		/* fall through */
+		fallthrough;
 	case CAN_STATE_ERROR_WARNING:
 		reg_idr = AT91_IRQ_ERRA | AT91_IRQ_WARN | AT91_IRQ_BOFF;
 		reg_ier = AT91_IRQ_ERRP;
diff --git a/drivers/net/can/peak_canfd/peak_pciefd_main.c b/drivers/net/can/peak_canfd/peak_pciefd_main.c
index 6ad83a8810395..9469d4421afe5 100644
--- a/drivers/net/can/peak_canfd/peak_pciefd_main.c
+++ b/drivers/net/can/peak_canfd/peak_pciefd_main.c
@@ -659,7 +659,7 @@ static int pciefd_can_probe(struct pciefd_board *pciefd)
 		pciefd_can_writereg(priv, CANFD_CLK_SEL_80MHZ,
 				    PCIEFD_REG_CAN_CLK_SEL);
 
-		/* fall through */
+		fallthrough;
 	case CANFD_CLK_SEL_80MHZ:
 		priv->ucan.can.clock.freq = 80 * 1000 * 1000;
 		break;
diff --git a/drivers/net/can/sja1000/sja1000_platform.c b/drivers/net/can/sja1000/sja1000_platform.c
index d7222ba466225..d7c2ec529b8f1 100644
--- a/drivers/net/can/sja1000/sja1000_platform.c
+++ b/drivers/net/can/sja1000/sja1000_platform.c
@@ -150,7 +150,7 @@ static void sp_populate_of(struct sja1000_priv *priv, struct device_node *of)
 		priv->read_reg = sp_read_reg16;
 		priv->write_reg = sp_write_reg16;
 		break;
-	case 1:	/* fallthrough */
+	case 1:
 	default:
 		priv->read_reg = sp_read_reg8;
 		priv->write_reg = sp_write_reg8;
diff --git a/drivers/net/can/slcan.c b/drivers/net/can/slcan.c
index 91cdc0a2b1a74..b4a39f0449ba4 100644
--- a/drivers/net/can/slcan.c
+++ b/drivers/net/can/slcan.c
@@ -153,7 +153,7 @@ static void slc_bump(struct slcan *sl)
 	switch (*cmd) {
 	case 'r':
 		cf.can_id = CAN_RTR_FLAG;
-		/* fallthrough */
+		fallthrough;
 	case 't':
 		/* store dlc ASCII value and terminate SFF CAN ID string */
 		cf.can_dlc = sl->rbuff[SLC_CMD_LEN + SLC_SFF_ID_LEN];
@@ -163,7 +163,7 @@ static void slc_bump(struct slcan *sl)
 		break;
 	case 'R':
 		cf.can_id = CAN_RTR_FLAG;
-		/* fallthrough */
+		fallthrough;
 	case 'T':
 		cf.can_id |= CAN_EFF_FLAG;
 		/* store dlc ASCII value and terminate EFF CAN ID string */
diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c
index 5009ff2949411..d17608870f2d2 100644
--- a/drivers/net/can/spi/mcp251x.c
+++ b/drivers/net/can/spi/mcp251x.c
@@ -864,7 +864,7 @@ static irqreturn_t mcp251x_can_ist(int irq, void *dev_id)
 			if (new_state >= CAN_STATE_ERROR_WARNING &&
 			    new_state <= CAN_STATE_BUS_OFF)
 				priv->can.can_stats.error_warning++;
-			/* fall through */
+			fallthrough;
 		case CAN_STATE_ERROR_WARNING:
 			if (new_state >= CAN_STATE_ERROR_PASSIVE &&
 			    new_state <= CAN_STATE_BUS_OFF)
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb.c b/drivers/net/can/usb/peak_usb/pcan_usb.c
index d2539c95adb65..66d0198e7834d 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb.c
@@ -415,7 +415,7 @@ static int pcan_usb_decode_error(struct pcan_usb_msg_context *mc, u8 n,
 			new_state = CAN_STATE_ERROR_WARNING;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 
 	case CAN_STATE_ERROR_WARNING:
 		if (n & PCAN_USB_ERROR_BUS_HEAVY) {
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
index 0b7766b715fd2..d91df34e7fa88 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c
@@ -345,7 +345,7 @@ static netdev_tx_t peak_usb_ndo_start_xmit(struct sk_buff *skb,
 		default:
 			netdev_warn(netdev, "tx urb submitting failed err=%d\n",
 				    err);
-			/* fall through */
+			fallthrough;
 		case -ENOENT:
 			/* cable unplugged */
 			stats->tx_dropped++;
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
index 53cb2f72bdd05..1689ab3876120 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_pro.c
@@ -133,10 +133,10 @@ static int pcan_msg_add_rec(struct pcan_usb_pro_msg *pm, int id, ...)
 	switch (id) {
 	case PCAN_USBPRO_TXMSG8:
 		i += 4;
-		/* fall through */
+		fallthrough;
 	case PCAN_USBPRO_TXMSG4:
 		i += 4;
-		/* fall through */
+		fallthrough;
 	case PCAN_USBPRO_TXMSG0:
 		*pc++ = va_arg(ap, int);
 		*pc++ = va_arg(ap, int);
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index 0837ae0e0c5e2..e731db900ee02 100644
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -1061,7 +1061,7 @@ static void b53_force_port_config(struct b53_device *dev, int port,
 	switch (speed) {
 	case 2000:
 		reg |= PORT_OVERRIDE_SPEED_2000M;
-		/* fallthrough */
+		fallthrough;
 	case SPEED_1000:
 		reg |= PORT_OVERRIDE_SPEED_1000M;
 		break;
diff --git a/drivers/net/dsa/b53/b53_serdes.c b/drivers/net/dsa/b53/b53_serdes.c
index 629bf14128a28..5ae3d9783b68c 100644
--- a/drivers/net/dsa/b53/b53_serdes.c
+++ b/drivers/net/dsa/b53/b53_serdes.c
@@ -170,7 +170,7 @@ void b53_serdes_phylink_validate(struct b53_device *dev, int port,
 	switch (lane) {
 	case 0:
 		phylink_set(supported, 2500baseX_Full);
-		/* fallthrough */
+		fallthrough;
 	case 1:
 		phylink_set(supported, 1000baseX_Full);
 		break;
diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index bafddb35f3a99..5ebff986a1ac7 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -566,7 +566,7 @@ static void bcm_sf2_sw_mac_config(struct dsa_switch *ds, int port,
 	switch (state->interface) {
 	case PHY_INTERFACE_MODE_RGMII:
 		id_mode_dis = 1;
-		/* fallthrough */
+		fallthrough;
 	case PHY_INTERFACE_MODE_RGMII_TXID:
 		port_mode = EXT_GPHY;
 		break;
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index dc999406ce866..3cb22d1498131 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -1083,7 +1083,7 @@ static phy_interface_t ksz9477_get_interface(struct ksz_device *dev, int port)
 		interface = PHY_INTERFACE_MODE_GMII;
 		if (gbit)
 			break;
-		/* fall through */
+		fallthrough;
 	case 0:
 		interface = PHY_INTERFACE_MODE_MII;
 		break;
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 8dcb8a49ab67f..0c37ddb58c1e2 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -566,7 +566,7 @@ static void mt7530_setup_port5(struct dsa_switch *ds, phy_interface_t interface)
 	case P5_INTF_SEL_PHY_P0:
 		/* MT7530_P5_MODE_GPHY_P0: 2nd GMAC -> P5 -> P0 */
 		val |= MHWTRAP_PHY0_SEL;
-		/* fall through */
+		fallthrough;
 	case P5_INTF_SEL_PHY_P4:
 		/* MT7530_P5_MODE_GPHY_P4: 2nd GMAC -> P5 -> P4 */
 		val &= ~MHWTRAP_P5_MAC_SEL & ~MHWTRAP_P5_DIS;
diff --git a/drivers/net/dsa/mv88e6xxx/chip.c b/drivers/net/dsa/mv88e6xxx/chip.c
index 7a71c9902e73e..f0dbc05e30a4d 100644
--- a/drivers/net/dsa/mv88e6xxx/chip.c
+++ b/drivers/net/dsa/mv88e6xxx/chip.c
@@ -875,7 +875,7 @@ static uint64_t _mv88e6xxx_get_ethtool_stat(struct mv88e6xxx_chip *chip,
 		break;
 	case STATS_TYPE_BANK1:
 		reg = bank1_select;
-		/* fall through */
+		fallthrough;
 	case STATS_TYPE_BANK0:
 		reg |= s->reg | histogram;
 		mv88e6xxx_g1_stats_read(chip, reg, &low);
diff --git a/drivers/net/ethernet/3com/3c509.c b/drivers/net/ethernet/3com/3c509.c
index 139d0120f5114..667f38c9e4c63 100644
--- a/drivers/net/ethernet/3com/3c509.c
+++ b/drivers/net/ethernet/3com/3c509.c
@@ -1259,14 +1259,14 @@ el3_up(struct net_device *dev)
 					pr_cont("Forcing 3c5x9b full-duplex mode");
 					break;
 				}
-				/* fall through */
+				fallthrough;
 			case 8:
 				/* set full-duplex mode based on eeprom config setting */
 				if ((sw_info & 0x000f) && (sw_info & 0x8000)) {
 					pr_cont("Setting 3c5x9b full-duplex mode (from EEPROM configuration bit)");
 					break;
 				}
-				/* fall through */
+				fallthrough;
 			default:
 				/* xcvr=(0 || 4) OR user has an old 3c5x9 non "B" model */
 				pr_cont("Setting 3c5x9/3c5x9B half-duplex mode");
diff --git a/drivers/net/ethernet/3com/3c574_cs.c b/drivers/net/ethernet/3com/3c574_cs.c
index bd0ada4e81b0f..f66e7fb9a2bb9 100644
--- a/drivers/net/ethernet/3com/3c574_cs.c
+++ b/drivers/net/ethernet/3com/3c574_cs.c
@@ -1046,7 +1046,7 @@ static int el3_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 	switch(cmd) {
 	case SIOCGMIIPHY:		/* Get the address of the PHY in use. */
 		data->phy_id = phy;
-		/* fall through */
+		fallthrough;
 	case SIOCGMIIREG:		/* Read the specified MII register. */
 		{
 			int saved_window;
diff --git a/drivers/net/ethernet/8390/axnet_cs.c b/drivers/net/ethernet/8390/axnet_cs.c
index 08db4c9da2fa8..a00b36f91d9f2 100644
--- a/drivers/net/ethernet/8390/axnet_cs.c
+++ b/drivers/net/ethernet/8390/axnet_cs.c
@@ -610,7 +610,7 @@ static int axnet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
     switch (cmd) {
     case SIOCGMIIPHY:
 	data->phy_id = info->phy_id;
-	/* Fall through */
+	fallthrough;
     case SIOCGMIIREG:		/* Read MII PHY register. */
 	data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
 	return 0;
diff --git a/drivers/net/ethernet/8390/pcnet_cs.c b/drivers/net/ethernet/8390/pcnet_cs.c
index 645efac6310dd..164c3ed550bf1 100644
--- a/drivers/net/ethernet/8390/pcnet_cs.c
+++ b/drivers/net/ethernet/8390/pcnet_cs.c
@@ -1108,7 +1108,7 @@ static int ei_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
     switch (cmd) {
     case SIOCGMIIPHY:
 	data->phy_id = info->phy_id;
-	/* fall through */
+	fallthrough;
     case SIOCGMIIREG:		/* Read MII PHY register. */
 	data->val_out = mdio_read(mii_addr, data->phy_id, data->reg_num & 0x1f);
 	return 0;
diff --git a/drivers/net/ethernet/alacritech/slicoss.c b/drivers/net/ethernet/alacritech/slicoss.c
index 6234fcd844eea..696517eae77f0 100644
--- a/drivers/net/ethernet/alacritech/slicoss.c
+++ b/drivers/net/ethernet/alacritech/slicoss.c
@@ -1712,13 +1712,13 @@ static bool slic_is_fiber(unsigned short subdev)
 {
 	switch (subdev) {
 	/* Mojave */
-	case PCI_SUBDEVICE_ID_ALACRITECH_1000X1F: /* fallthrough */
-	case PCI_SUBDEVICE_ID_ALACRITECH_SES1001F: /* fallthrough */
+	case PCI_SUBDEVICE_ID_ALACRITECH_1000X1F:
+	case PCI_SUBDEVICE_ID_ALACRITECH_SES1001F: fallthrough;
 	/* Oasis */
-	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2002XF: /* fallthrough */
-	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2001XF: /* fallthrough */
-	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2104EF: /* fallthrough */
-	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2102EF: /* fallthrough */
+	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2002XF:
+	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2001XF:
+	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2104EF:
+	case PCI_SUBDEVICE_ID_ALACRITECH_SEN2102EF:
 		return true;
 	}
 	return false;
diff --git a/drivers/net/ethernet/alteon/acenic.c b/drivers/net/ethernet/alteon/acenic.c
index ac86fcae1582d..8470c836fa188 100644
--- a/drivers/net/ethernet/alteon/acenic.c
+++ b/drivers/net/ethernet/alteon/acenic.c
@@ -547,7 +547,7 @@ static int acenic_probe_one(struct pci_dev *pdev,
 			       ap->name);
 			break;
 		}
-		/* Fall through */
+		fallthrough;
 	case PCI_VENDOR_ID_SGI:
 		printk(KERN_INFO "%s: SGI AceNIC ", ap->name);
 		break;
diff --git a/drivers/net/ethernet/amd/amd8111e.c b/drivers/net/ethernet/amd/amd8111e.c
index b6c43b58ed3d4..960d483e89972 100644
--- a/drivers/net/ethernet/amd/amd8111e.c
+++ b/drivers/net/ethernet/amd/amd8111e.c
@@ -1475,7 +1475,7 @@ static int amd8111e_ioctl(struct net_device *dev , struct ifreq *ifr, int cmd)
 	case SIOCGMIIPHY:
 		data->phy_id = lp->ext_phy_addr;
 
-	/* fallthru */
+		fallthrough;
 	case SIOCGMIIREG:
 
 		spin_lock_irq(&lp->lock);
diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
index 43294a148f8a7..4ba75551cb179 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-drv.c
@@ -1538,7 +1538,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata,
 	/* PTP v2, UDP, any kind of event packet */
 	case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
 		XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
-		/* Fall through - to PTP v1, UDP, any kind of event packet */
+		fallthrough;	/* to PTP v1, UDP, any kind of event packet */
 	case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
 		XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
 		XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
@@ -1549,7 +1549,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata,
 	/* PTP v2, UDP, Sync packet */
 	case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
 		XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
-		/* Fall through - to PTP v1, UDP, Sync packet */
+		fallthrough;	/* to PTP v1, UDP, Sync packet */
 	case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
 		XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
 		XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
@@ -1560,7 +1560,7 @@ static int xgbe_set_hwtstamp_settings(struct xgbe_prv_data *pdata,
 	/* PTP v2, UDP, Delay_req packet */
 	case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
 		XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSVER2ENA, 1);
-		/* Fall through - to PTP v1, UDP, Delay_req packet */
+		fallthrough;	/* to PTP v1, UDP, Delay_req packet */
 	case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
 		XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV4ENA, 1);
 		XGMAC_SET_BITS(mac_tscr, MAC_TSCR, TSIPV6ENA, 1);
diff --git a/drivers/net/ethernet/broadcom/bgmac-bcma.c b/drivers/net/ethernet/broadcom/bgmac-bcma.c
index 34d18302b1a38..a5fd161ab5ee1 100644
--- a/drivers/net/ethernet/broadcom/bgmac-bcma.c
+++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c
@@ -217,7 +217,7 @@ static int bgmac_probe(struct bcma_device *core)
 	/* BCM 471X/535X family */
 	case BCMA_CHIP_ID_BCM4716:
 		bgmac->feature_flags |= BGMAC_FEAT_CLKCTLST;
-		/* fallthrough */
+		fallthrough;
 	case BCMA_CHIP_ID_BCM47162:
 		bgmac->feature_flags |= BGMAC_FEAT_FLW_CTRL2;
 		bgmac->feature_flags |= BGMAC_FEAT_SET_RXQ_CLK;
diff --git a/drivers/net/ethernet/broadcom/bgmac-platform.c b/drivers/net/ethernet/broadcom/bgmac-platform.c
index 6795b6d95f54d..f37f1c58f3689 100644
--- a/drivers/net/ethernet/broadcom/bgmac-platform.c
+++ b/drivers/net/ethernet/broadcom/bgmac-platform.c
@@ -131,7 +131,7 @@ static void bgmac_nicpm_speed_set(struct net_device *net_dev)
 	switch (bgmac->net_dev->phydev->speed) {
 	default:
 		netdev_err(net_dev, "Unsupported speed. Defaulting to 1000Mb\n");
-		/* fall through */
+		fallthrough;
 	case SPEED_1000:
 		val |= NICPM_IOMUX_CTRL_SPD_1000M << NICPM_IOMUX_CTRL_SPD_SHIFT;
 		break;
diff --git a/drivers/net/ethernet/broadcom/bnx2.c b/drivers/net/ethernet/broadcom/bnx2.c
index c8cc14eadbb4a..3e8a179f39db4 100644
--- a/drivers/net/ethernet/broadcom/bnx2.c
+++ b/drivers/net/ethernet/broadcom/bnx2.c
@@ -1337,13 +1337,13 @@ bnx2_set_mac_link(struct bnx2 *bp)
 					val |= BNX2_EMAC_MODE_PORT_MII_10M;
 					break;
 				}
-				/* fall through */
+				fallthrough;
 			case SPEED_100:
 				val |= BNX2_EMAC_MODE_PORT_MII;
 				break;
 			case SPEED_2500:
 				val |= BNX2_EMAC_MODE_25G_MODE;
-				/* fall through */
+				fallthrough;
 			case SPEED_1000:
 				val |= BNX2_EMAC_MODE_PORT_GMII;
 				break;
@@ -1995,26 +1995,26 @@ bnx2_remote_phy_event(struct bnx2 *bp)
 		switch (speed) {
 			case BNX2_LINK_STATUS_10HALF:
 				bp->duplex = DUPLEX_HALF;
-				/* fall through */
+				fallthrough;
 			case BNX2_LINK_STATUS_10FULL:
 				bp->line_speed = SPEED_10;
 				break;
 			case BNX2_LINK_STATUS_100HALF:
 				bp->duplex = DUPLEX_HALF;
-				/* fall through */
+				fallthrough;
 			case BNX2_LINK_STATUS_100BASE_T4:
 			case BNX2_LINK_STATUS_100FULL:
 				bp->line_speed = SPEED_100;
 				break;
 			case BNX2_LINK_STATUS_1000HALF:
 				bp->duplex = DUPLEX_HALF;
-				/* fall through */
+				fallthrough;
 			case BNX2_LINK_STATUS_1000FULL:
 				bp->line_speed = SPEED_1000;
 				break;
 			case BNX2_LINK_STATUS_2500HALF:
 				bp->duplex = DUPLEX_HALF;
-				/* fall through */
+				fallthrough;
 			case BNX2_LINK_STATUS_2500FULL:
 				bp->line_speed = SPEED_2500;
 				break;
@@ -7856,7 +7856,7 @@ bnx2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	case SIOCGMIIPHY:
 		data->phy_id = bp->phy_addr;
 
-		/* fallthru */
+		fallthrough;
 	case SIOCGMIIREG: {
 		u32 mii_regval;
 
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
index 1426c691c7c4a..4e85e7dbc2be3 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c
@@ -4712,14 +4712,14 @@ static void bnx2x_sync_link(struct link_params *params,
 			LINK_STATUS_SPEED_AND_DUPLEX_MASK) {
 		case LINK_10THD:
 			vars->duplex = DUPLEX_HALF;
-			/* Fall thru */
+			fallthrough;
 		case LINK_10TFD:
 			vars->line_speed = SPEED_10;
 			break;
 
 		case LINK_100TXHD:
 			vars->duplex = DUPLEX_HALF;
-			/* Fall thru */
+			fallthrough;
 		case LINK_100T4:
 		case LINK_100TXFD:
 			vars->line_speed = SPEED_100;
@@ -4727,14 +4727,14 @@ static void bnx2x_sync_link(struct link_params *params,
 
 		case LINK_1000THD:
 			vars->duplex = DUPLEX_HALF;
-			/* Fall thru */
+			fallthrough;
 		case LINK_1000TFD:
 			vars->line_speed = SPEED_1000;
 			break;
 
 		case LINK_2500THD:
 			vars->duplex = DUPLEX_HALF;
-			/* Fall thru */
+			fallthrough;
 		case LINK_2500TFD:
 			vars->line_speed = SPEED_2500;
 			break;
@@ -6339,7 +6339,7 @@ int bnx2x_set_led(struct link_params *params,
 		 */
 		if (!vars->link_up)
 			break;
-		/* fall through */
+		fallthrough;
 	case LED_MODE_ON:
 		if (((params->phy[EXT_PHY1].type ==
 			  PORT_HW_CFG_XGXS_EXT_PHY_TYPE_BCM8727) ||
@@ -12508,13 +12508,13 @@ static void bnx2x_phy_def_cfg(struct link_params *params,
 	switch (link_config  & PORT_FEATURE_LINK_SPEED_MASK) {
 	case PORT_FEATURE_LINK_SPEED_10M_HALF:
 		phy->req_duplex = DUPLEX_HALF;
-		/* fall through */
+		fallthrough;
 	case PORT_FEATURE_LINK_SPEED_10M_FULL:
 		phy->req_line_speed = SPEED_10;
 		break;
 	case PORT_FEATURE_LINK_SPEED_100M_HALF:
 		phy->req_duplex = DUPLEX_HALF;
-		/* fall through */
+		fallthrough;
 	case PORT_FEATURE_LINK_SPEED_100M_FULL:
 		phy->req_line_speed = SPEED_100;
 		break;
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index 7f24d2689fdd7..3c543dd7a8f30 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -8600,11 +8600,11 @@ int bnx2x_set_int_mode(struct bnx2x *bp)
 			       bp->num_queues,
 			       1 + bp->num_cnic_queues);
 
-		/* fall through */
+		fallthrough;
 	case BNX2X_INT_MODE_MSI:
 		bnx2x_enable_msi(bp);
 
-		/* fall through */
+		fallthrough;
 	case BNX2X_INT_MODE_INTX:
 		bp->num_ethernet_queues = 1;
 		bp->num_queues = bp->num_ethernet_queues + bp->num_cnic_queues;
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
index 80d250a6d048e..e26f4da5a6d7e 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sp.c
@@ -3258,7 +3258,7 @@ static int bnx2x_mcast_validate_e2(struct bnx2x *bp,
 	/* DEL command deletes all currently configured MACs */
 	case BNX2X_MCAST_CMD_DEL:
 		o->set_registry_size(o, 0);
-		/* fall through */
+		fallthrough;
 
 	/* RESTORE command will restore the entire multicast configuration */
 	case BNX2X_MCAST_CMD_RESTORE:
@@ -3592,7 +3592,7 @@ static int bnx2x_mcast_validate_e1(struct bnx2x *bp,
 	/* DEL command deletes all currently configured MACs */
 	case BNX2X_MCAST_CMD_DEL:
 		o->set_registry_size(o, 0);
-		/* fall through */
+		fallthrough;
 
 	/* RESTORE command will restore the entire multicast configuration */
 	case BNX2X_MCAST_CMD_RESTORE:
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
index b4476f44e3867..9c2f51f230351 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c
@@ -1809,7 +1809,7 @@ int bnx2x_iov_eq_sp_event(struct bnx2x *bp, union event_ring_elem *elem)
 		DP(BNX2X_MSG_IOV, "got VF [%d:%d] RSS update ramrod\n",
 		   vf->abs_vfid, qidx);
 		bnx2x_vf_handle_rss_update_eqe(bp, vf);
-		/* fall through */
+		fallthrough;
 	case EVENT_RING_OPCODE_VF_FLR:
 		/* Do nothing for now */
 		return 0;
@@ -2207,7 +2207,7 @@ int bnx2x_vf_free(struct bnx2x *bp, struct bnx2x_virtf *vf)
 		rc = bnx2x_vf_close(bp, vf);
 		if (rc)
 			goto op_err;
-		/* Fall through - to release resources */
+		fallthrough;	/* to release resources */
 	case VF_ACQUIRED:
 		DP(BNX2X_MSG_IOV, "about to free resources\n");
 		bnx2x_vf_free_resc(bp, vf);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 31fb5a28e1c4f..f92fd8863f48f 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1923,7 +1923,7 @@ u32 bnxt_fw_health_readl(struct bnxt *bp, int reg_idx)
 		break;
 	case BNXT_FW_HEALTH_REG_TYPE_GRC:
 		reg_off = fw_health->mapped_regs[reg_idx];
-		/* fall through */
+		fallthrough;
 	case BNXT_FW_HEALTH_REG_TYPE_BAR0:
 		val = readl(bp->bar0 + reg_off);
 		break;
@@ -1966,11 +1966,11 @@ static int bnxt_async_event_process(struct bnxt *bp,
 		}
 		set_bit(BNXT_LINK_SPEED_CHNG_SP_EVENT, &bp->sp_event);
 	}
-	/* fall through */
+		fallthrough;
 	case ASYNC_EVENT_CMPL_EVENT_ID_LINK_SPEED_CHANGE:
 	case ASYNC_EVENT_CMPL_EVENT_ID_PORT_PHY_CFG_CHANGE:
 		set_bit(BNXT_LINK_CFG_CHANGE_SP_EVENT, &bp->sp_event);
-		/* fall through */
+		fallthrough;
 	case ASYNC_EVENT_CMPL_EVENT_ID_LINK_STATUS_CHANGE:
 		set_bit(BNXT_LINK_CHNG_SP_EVENT, &bp->sp_event);
 		break;
@@ -9765,7 +9765,7 @@ static int bnxt_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	case SIOCGMIIPHY:
 		mdio->phy_id = bp->link_info.phy_addr;
 
-		/* fallthru */
+		fallthrough;
 	case SIOCGMIIREG: {
 		u16 mii_regval = 0;
 
@@ -11022,7 +11022,7 @@ static void bnxt_fw_reset_writel(struct bnxt *bp, int reg_idx)
 		writel(reg_off & BNXT_GRC_BASE_MASK,
 		       bp->bar0 + BNXT_GRCPF_REG_WINDOW_BASE_OUT + 4);
 		reg_off = (reg_off & BNXT_GRC_OFFSET_MASK) + 0x2000;
-		/* fall through */
+		fallthrough;
 	case BNXT_FW_HEALTH_REG_TYPE_BAR0:
 		writel(val, bp->bar0 + reg_off);
 		break;
@@ -11135,7 +11135,7 @@ static void bnxt_fw_reset_task(struct work_struct *work)
 		}
 		bp->fw_reset_state = BNXT_FW_RESET_STATE_RESET_FW;
 	}
-	/* fall through */
+		fallthrough;
 	case BNXT_FW_RESET_STATE_RESET_FW:
 		bnxt_reset_all(bp);
 		bp->fw_reset_state = BNXT_FW_RESET_STATE_ENABLE_DEV;
@@ -11158,7 +11158,7 @@ static void bnxt_fw_reset_task(struct work_struct *work)
 		}
 		pci_set_master(bp->pdev);
 		bp->fw_reset_state = BNXT_FW_RESET_STATE_POLL_FW;
-		/* fall through */
+		fallthrough;
 	case BNXT_FW_RESET_STATE_POLL_FW:
 		bp->hwrm_cmd_timeout = SHORT_HWRM_CMD_TIMEOUT;
 		rc = __bnxt_hwrm_ver_get(bp, true);
@@ -11173,7 +11173,7 @@ static void bnxt_fw_reset_task(struct work_struct *work)
 		}
 		bp->hwrm_cmd_timeout = DFLT_HWRM_CMD_TIMEOUT;
 		bp->fw_reset_state = BNXT_FW_RESET_STATE_OPENING;
-		/* fall through */
+		fallthrough;
 	case BNXT_FW_RESET_STATE_OPENING:
 		while (!rtnl_trylock()) {
 			bnxt_queue_fw_reset_work(bp, HZ / 10);
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 64da654f10389..17934cd87a4aa 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -1073,7 +1073,7 @@ static int bnxt_grxfh(struct bnxt *bp, struct ethtool_rxnfc *cmd)
 		if (bp->rss_hash_cfg & VNIC_RSS_CFG_REQ_HASH_TYPE_UDP_IPV4)
 			cmd->data |= RXH_IP_SRC | RXH_IP_DST |
 				     RXH_L4_B_0_1 | RXH_L4_B_2_3;
-		/* fall through */
+		fallthrough;
 	case SCTP_V4_FLOW:
 	case AH_ESP_V4_FLOW:
 	case AH_V4_FLOW:
@@ -1092,7 +1092,7 @@ static int bnxt_grxfh(struct bnxt *bp, struct ethtool_rxnfc *cmd)
 		if (bp->rss_hash_cfg & VNIC_RSS_CFG_REQ_HASH_TYPE_UDP_IPV6)
 			cmd->data |= RXH_IP_SRC | RXH_IP_DST |
 				     RXH_L4_B_0_1 | RXH_L4_B_2_3;
-		/* fall through */
+		fallthrough;
 	case SCTP_V6_FLOW:
 	case AH_ESP_V6_FLOW:
 	case AH_V6_FLOW:
diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
index 2704a4709bc7b..fcc262064766a 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
@@ -201,10 +201,10 @@ bool bnxt_rx_xdp(struct bnxt *bp, struct bnxt_rx_ring_info *rxr, u16 cons,
 		break;
 	default:
 		bpf_warn_invalid_xdp_action(act);
-		/* Fall thru */
+		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(bp->dev, xdp_prog, act);
-		/* Fall thru */
+		fallthrough;
 	case XDP_DROP:
 		bnxt_reuse_rx_data(rxr, cons, page);
 		break;
diff --git a/drivers/net/ethernet/broadcom/cnic.c b/drivers/net/ethernet/broadcom/cnic.c
index c5cca63b85710..84536292b0313 100644
--- a/drivers/net/ethernet/broadcom/cnic.c
+++ b/drivers/net/ethernet/broadcom/cnic.c
@@ -3311,7 +3311,7 @@ static int cnic_ctl(void *data, struct cnic_ctl_info *info)
 	}
 	case CNIC_CTL_FCOE_STATS_GET_CMD:
 		ulp_type = CNIC_ULP_FCOE;
-		/* fall through */
+		fallthrough;
 	case CNIC_CTL_ISCSI_STATS_GET_CMD:
 		cnic_hold(dev);
 		cnic_copy_ulp_stats(dev, ulp_type);
@@ -4044,7 +4044,7 @@ static void cnic_cm_process_kcqe(struct cnic_dev *dev, struct kcqe *kcqe)
 			    l4kcqe->status, l5kcqe->completion_status);
 		opcode = L4_KCQE_OPCODE_VALUE_CLOSE_COMP;
 	}
-		/* Fall through */
+		fallthrough;
 	case L4_KCQE_OPCODE_VALUE_RESET_RECEIVED:
 	case L4_KCQE_OPCODE_VALUE_CLOSE_COMP:
 	case L4_KCQE_OPCODE_VALUE_RESET_COMP:
diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 1fecc25767bd0..0ca8436d2e9d8 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1185,10 +1185,10 @@ static void bcmgenet_update_mib_counters(struct bcmgenet_priv *priv)
 			continue;
 		case BCMGENET_STAT_RUNT:
 			offset += BCMGENET_STAT_OFFSET;
-			/* fall through */
+			fallthrough;
 		case BCMGENET_STAT_MIB_TX:
 			offset += BCMGENET_STAT_OFFSET;
-			/* fall through */
+			fallthrough;
 		case BCMGENET_STAT_MIB_RX:
 			val = bcmgenet_umac_readl(priv,
 						  UMAC_MIB_START + j + offset);
diff --git a/drivers/net/ethernet/broadcom/genet/bcmmii.c b/drivers/net/ethernet/broadcom/genet/bcmmii.c
index 511d553a4d113..6fb6c35562854 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmmii.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmmii.c
@@ -192,7 +192,7 @@ int bcmgenet_mii_config(struct net_device *dev, bool init)
 	switch (priv->phy_interface) {
 	case PHY_INTERFACE_MODE_INTERNAL:
 		phy_name = "internal PHY";
-		/* fall through */
+		fallthrough;
 	case PHY_INTERFACE_MODE_MOCA:
 		/* Irrespective of the actually configured PHY speed (100 or
 		 * 1000) GENETv4 only has an internal GPHY so we will just end
diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index ebff1fc0d8cef..9894594d957de 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -715,7 +715,7 @@ static int tg3_ape_lock(struct tg3 *tp, int locknum)
 	case TG3_APE_LOCK_GPIO:
 		if (tg3_asic_rev(tp) == ASIC_REV_5761)
 			return 0;
-		/* fall through */
+		fallthrough;
 	case TG3_APE_LOCK_GRC:
 	case TG3_APE_LOCK_MEM:
 		if (!tp->pci_fn)
@@ -776,7 +776,7 @@ static void tg3_ape_unlock(struct tg3 *tp, int locknum)
 	case TG3_APE_LOCK_GPIO:
 		if (tg3_asic_rev(tp) == ASIC_REV_5761)
 			return;
-		/* fall through */
+		fallthrough;
 	case TG3_APE_LOCK_GRC:
 	case TG3_APE_LOCK_MEM:
 		if (!tp->pci_fn)
@@ -1586,7 +1586,7 @@ static int tg3_mdio_init(struct tg3 *tp)
 			phydev->dev_flags |= PHY_BRCM_EXT_IBND_RX_ENABLE;
 		if (tg3_flag(tp, RGMII_EXT_IBND_TX_EN))
 			phydev->dev_flags |= PHY_BRCM_EXT_IBND_TX_ENABLE;
-		/* fall through */
+		fallthrough;
 	case PHY_ID_RTL8211C:
 		phydev->interface = PHY_INTERFACE_MODE_RGMII;
 		break;
@@ -2114,7 +2114,7 @@ static int tg3_phy_init(struct tg3 *tp)
 			phy_support_asym_pause(phydev);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case PHY_INTERFACE_MODE_MII:
 		phy_set_max_speed(phydev, SPEED_100);
 		phy_support_asym_pause(phydev);
@@ -4390,7 +4390,7 @@ static int tg3_phy_autoneg_cfg(struct tg3 *tp, u32 advertise, u32 flowctrl)
 				      MII_TG3_DSP_TAP26_RMRXSTO |
 				      MII_TG3_DSP_TAP26_OPCSINPT;
 			tg3_phydsp_write(tp, MII_TG3_DSP_TAP26, val);
-			/* Fall through */
+			fallthrough;
 		case ASIC_REV_5720:
 		case ASIC_REV_5762:
 			if (!tg3_phydsp_read(tp, MII_TG3_DSP_CH34TP2, &val))
@@ -4538,7 +4538,7 @@ static int tg3_phy_pull_config(struct tg3 *tp)
 				tp->link_config.speed = SPEED_1000;
 				break;
 			}
-			/* Fall through */
+			fallthrough;
 		default:
 			goto done;
 		}
@@ -5209,7 +5209,7 @@ static int tg3_fiber_aneg_smachine(struct tg3 *tp,
 		if (ap->flags & (MR_AN_ENABLE | MR_RESTART_AN))
 			ap->state = ANEG_STATE_AN_ENABLE;
 
-		/* fall through */
+		fallthrough;
 	case ANEG_STATE_AN_ENABLE:
 		ap->flags &= ~(MR_AN_COMPLETE | MR_PAGE_RX);
 		if (ap->flags & MR_AN_ENABLE) {
@@ -5239,7 +5239,7 @@ static int tg3_fiber_aneg_smachine(struct tg3 *tp,
 		ret = ANEG_TIMER_ENAB;
 		ap->state = ANEG_STATE_RESTART;
 
-		/* fall through */
+		fallthrough;
 	case ANEG_STATE_RESTART:
 		delta = ap->cur_time - ap->link_time;
 		if (delta > ANEG_STATE_SETTLE_TIME)
@@ -5282,7 +5282,7 @@ static int tg3_fiber_aneg_smachine(struct tg3 *tp,
 
 		ap->state = ANEG_STATE_ACK_DETECT;
 
-		/* fall through */
+		fallthrough;
 	case ANEG_STATE_ACK_DETECT:
 		if (ap->ack_match != 0) {
 			if ((ap->rxconfig & ~ANEG_CFG_ACK) ==
@@ -10720,40 +10720,40 @@ static int tg3_reset_hw(struct tg3 *tp, bool reset_phy)
 	switch (limit) {
 	case 16:
 		tw32(MAC_RCV_RULE_15,  0); tw32(MAC_RCV_VALUE_15,  0);
-		/* fall through */
+		fallthrough;
 	case 15:
 		tw32(MAC_RCV_RULE_14,  0); tw32(MAC_RCV_VALUE_14,  0);
-		/* fall through */
+		fallthrough;
 	case 14:
 		tw32(MAC_RCV_RULE_13,  0); tw32(MAC_RCV_VALUE_13,  0);
-		/* fall through */
+		fallthrough;
 	case 13:
 		tw32(MAC_RCV_RULE_12,  0); tw32(MAC_RCV_VALUE_12,  0);
-		/* fall through */
+		fallthrough;
 	case 12:
 		tw32(MAC_RCV_RULE_11,  0); tw32(MAC_RCV_VALUE_11,  0);
-		/* fall through */
+		fallthrough;
 	case 11:
 		tw32(MAC_RCV_RULE_10,  0); tw32(MAC_RCV_VALUE_10,  0);
-		/* fall through */
+		fallthrough;
 	case 10:
 		tw32(MAC_RCV_RULE_9,  0); tw32(MAC_RCV_VALUE_9,  0);
-		/* fall through */
+		fallthrough;
 	case 9:
 		tw32(MAC_RCV_RULE_8,  0); tw32(MAC_RCV_VALUE_8,  0);
-		/* fall through */
+		fallthrough;
 	case 8:
 		tw32(MAC_RCV_RULE_7,  0); tw32(MAC_RCV_VALUE_7,  0);
-		/* fall through */
+		fallthrough;
 	case 7:
 		tw32(MAC_RCV_RULE_6,  0); tw32(MAC_RCV_VALUE_6,  0);
-		/* fall through */
+		fallthrough;
 	case 6:
 		tw32(MAC_RCV_RULE_5,  0); tw32(MAC_RCV_VALUE_5,  0);
-		/* fall through */
+		fallthrough;
 	case 5:
 		tw32(MAC_RCV_RULE_4,  0); tw32(MAC_RCV_VALUE_4,  0);
-		/* fall through */
+		fallthrough;
 	case 4:
 		/* tw32(MAC_RCV_RULE_3,  0); tw32(MAC_RCV_VALUE_3,  0); */
 	case 3:
@@ -13998,7 +13998,7 @@ static int tg3_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	case SIOCGMIIPHY:
 		data->phy_id = tp->phy_addr;
 
-		/* fall through */
+		fallthrough;
 	case SIOCGMIIREG: {
 		u32 mii_regval;
 
@@ -17136,7 +17136,7 @@ static u32 tg3_calc_dma_bndry(struct tg3 *tp, u32 val)
 				val |= DMA_RWCTRL_WRITE_BNDRY_64_PCIE;
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case 128:
 		default:
 			val &= ~DMA_RWCTRL_WRITE_BNDRY_DISAB_PCIE;
@@ -17151,28 +17151,28 @@ static u32 tg3_calc_dma_bndry(struct tg3 *tp, u32 val)
 					DMA_RWCTRL_WRITE_BNDRY_16);
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case 32:
 			if (goal == BOUNDARY_SINGLE_CACHELINE) {
 				val |= (DMA_RWCTRL_READ_BNDRY_32 |
 					DMA_RWCTRL_WRITE_BNDRY_32);
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case 64:
 			if (goal == BOUNDARY_SINGLE_CACHELINE) {
 				val |= (DMA_RWCTRL_READ_BNDRY_64 |
 					DMA_RWCTRL_WRITE_BNDRY_64);
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case 128:
 			if (goal == BOUNDARY_SINGLE_CACHELINE) {
 				val |= (DMA_RWCTRL_READ_BNDRY_128 |
 					DMA_RWCTRL_WRITE_BNDRY_128);
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case 256:
 			val |= (DMA_RWCTRL_READ_BNDRY_256 |
 				DMA_RWCTRL_WRITE_BNDRY_256);
diff --git a/drivers/net/ethernet/brocade/bna/bfa_ioc.c b/drivers/net/ethernet/brocade/bna/bfa_ioc.c
index 49358d42a0e26..b9dd06b129454 100644
--- a/drivers/net/ethernet/brocade/bna/bfa_ioc.c
+++ b/drivers/net/ethernet/brocade/bna/bfa_ioc.c
@@ -321,7 +321,7 @@ bfa_ioc_sm_getattr(struct bfa_ioc *ioc, enum ioc_event event)
 	case IOC_E_PFFAILED:
 	case IOC_E_HWERROR:
 		del_timer(&ioc->ioc_timer);
-		/* fall through */
+		fallthrough;
 	case IOC_E_TIMEOUT:
 		ioc->cbfn->enable_cbfn(ioc->bfa, BFA_STATUS_IOC_FAILURE);
 		bfa_fsm_set_state(ioc, bfa_ioc_sm_fail);
@@ -780,7 +780,7 @@ bfa_iocpf_sm_enabling(struct bfa_iocpf *iocpf, enum iocpf_event event)
 
 	case IOCPF_E_INITFAIL:
 		del_timer(&ioc->iocpf_timer);
-		/* fall through */
+		fallthrough;
 
 	case IOCPF_E_TIMEOUT:
 		bfa_nw_ioc_hw_sem_release(ioc);
@@ -849,7 +849,7 @@ bfa_iocpf_sm_disabling(struct bfa_iocpf *iocpf, enum iocpf_event event)
 
 	case IOCPF_E_FAIL:
 		del_timer(&ioc->iocpf_timer);
-		/* fall through*/
+		fallthrough;
 
 	case IOCPF_E_TIMEOUT:
 		bfa_ioc_set_cur_ioc_fwstate(ioc, BFI_IOC_FAIL);
diff --git a/drivers/net/ethernet/brocade/bna/bna_enet.c b/drivers/net/ethernet/brocade/bna/bna_enet.c
index 40107a9bd120f..a2c983f56b00e 100644
--- a/drivers/net/ethernet/brocade/bna/bna_enet.c
+++ b/drivers/net/ethernet/brocade/bna/bna_enet.c
@@ -1084,7 +1084,7 @@ bna_enet_sm_cfg_wait(struct bna_enet *enet,
 
 	case ENET_E_CHLD_STOPPED:
 		bna_enet_rx_start(enet);
-		/* Fall through */
+		fallthrough;
 	case ENET_E_FWRESP_PAUSE:
 		if (enet->flags & BNA_ENET_F_PAUSE_CHANGED) {
 			enet->flags &= ~BNA_ENET_F_PAUSE_CHANGED;
diff --git a/drivers/net/ethernet/brocade/bna/bna_tx_rx.c b/drivers/net/ethernet/brocade/bna/bna_tx_rx.c
index b5ecbfe13ab09..2623a0da46820 100644
--- a/drivers/net/ethernet/brocade/bna/bna_tx_rx.c
+++ b/drivers/net/ethernet/brocade/bna/bna_tx_rx.c
@@ -1636,7 +1636,7 @@ bna_bfi_rx_enet_start(struct bna_rx *rx)
 						&q1->qpt);
 			cfg_req->q_cfg[i].qs.rx_buffer_size =
 				htons((u16)q1->buffer_size);
-			/* Fall through */
+			fallthrough;
 
 		case BNA_RXP_SINGLE:
 			/* Large/Single RxQ */
diff --git a/drivers/net/ethernet/cadence/macb_ptp.c b/drivers/net/ethernet/cadence/macb_ptp.c
index 31ebf3ee7ec0e..283918aeb741d 100644
--- a/drivers/net/ethernet/cadence/macb_ptp.c
+++ b/drivers/net/ethernet/cadence/macb_ptp.c
@@ -460,7 +460,7 @@ int gem_set_hwtst(struct net_device *dev, struct ifreq *ifr, int cmd)
 	case HWTSTAMP_TX_ONESTEP_SYNC:
 		if (gem_ptp_set_one_step_sync(bp, 1) != 0)
 			return -ERANGE;
-		/* fall through */
+		fallthrough;
 	case HWTSTAMP_TX_ON:
 		tx_bd_control = TSTAMP_ALL_FRAMES;
 		break;
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index e73bc211779a0..8e0ed01e7f038 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -977,15 +977,14 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 
 		schedule_timeout_uninterruptible(HZ / 10);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_HOST_OK:
 
-		/* fallthrough */
 	case OCT_DEV_CONSOLE_INIT_DONE:
 		/* Remove any consoles */
 		octeon_remove_consoles(oct);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_IO_QUEUES_DONE:
 		if (lio_wait_for_instr_fetch(oct))
 			dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
@@ -1027,7 +1026,7 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 		octeon_free_sc_done_list(oct);
 		octeon_free_sc_zombie_list(oct);
 
-	/* fallthrough */
+		fallthrough;
 	case OCT_DEV_INTR_SET_DONE:
 		/* Disable interrupts  */
 		oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
@@ -1062,17 +1061,17 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 		kfree(oct->irq_name_storage);
 		oct->irq_name_storage = NULL;
 
-	/* fallthrough */
+		fallthrough;
 	case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
 		if (OCTEON_CN23XX_PF(oct))
 			octeon_free_ioq_vector(oct);
 
-	/* fallthrough */
+		fallthrough;
 	case OCT_DEV_MBOX_SETUP_DONE:
 		if (OCTEON_CN23XX_PF(oct))
 			oct->fn_list.free_mbox(oct);
 
-	/* fallthrough */
+		fallthrough;
 	case OCT_DEV_IN_RESET:
 	case OCT_DEV_DROQ_INIT_DONE:
 		/* Wait for any pending operations */
@@ -1095,11 +1094,11 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 			}
 		}
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_RESP_LIST_INIT_DONE:
 		octeon_delete_response_list(oct);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_INSTR_QUEUE_INIT_DONE:
 		for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 			if (!(oct->io_qmask.iq & BIT_ULL(i)))
@@ -1110,16 +1109,16 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 		if (oct->sriov_info.sriov_enabled)
 			pci_disable_sriov(oct->pci_dev);
 #endif
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
 		octeon_free_sc_buffer_pool(oct);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_DISPATCH_INIT_DONE:
 		octeon_delete_dispatch_list(oct);
 		cancel_delayed_work_sync(&oct->nic_poll_work.work);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_PCI_MAP_DONE:
 		refcount = octeon_deregister_device(oct);
 
@@ -1137,13 +1136,13 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 		octeon_unmap_pci_barx(oct, 0);
 		octeon_unmap_pci_barx(oct, 1);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_PCI_ENABLE_DONE:
 		pci_clear_master(oct->pci_dev);
 		/* Disable the device, releasing the PCI INT */
 		pci_disable_device(oct->pci_dev);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_BEGIN_STATE:
 		/* Nothing to be done here either */
 		break;
@@ -2168,7 +2167,7 @@ static int liquidio_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
 	case SIOCSHWTSTAMP:
 		if (lio->oct_dev->ptp_enable)
 			return hwtstamp_ioctl(netdev, ifr);
-		/* fall through */
+		fallthrough;
 	default:
 		return -EOPNOTSUPP;
 	}
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index 90ef21086f271..8c5879e31240f 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -460,9 +460,8 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 
 		schedule_timeout_uninterruptible(HZ / 10);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_HOST_OK:
-		/* fallthrough */
 	case OCT_DEV_IO_QUEUES_DONE:
 		if (lio_wait_for_instr_fetch(oct))
 			dev_err(&oct->pci_dev->dev, "IQ had pending instructions\n");
@@ -504,7 +503,7 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 		octeon_free_sc_done_list(oct);
 		octeon_free_sc_zombie_list(oct);
 
-	/* fall through */
+		fallthrough;
 	case OCT_DEV_INTR_SET_DONE:
 		/* Disable interrupts  */
 		oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
@@ -533,15 +532,15 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 		else
 			cn23xx_vf_ask_pf_to_do_flr(oct);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_MSIX_ALLOC_VECTOR_DONE:
 		octeon_free_ioq_vector(oct);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_MBOX_SETUP_DONE:
 		oct->fn_list.free_mbox(oct);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_IN_RESET:
 	case OCT_DEV_DROQ_INIT_DONE:
 		mdelay(100);
@@ -551,11 +550,11 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 			octeon_delete_droq(oct, i);
 		}
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_RESP_LIST_INIT_DONE:
 		octeon_delete_response_list(oct);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_INSTR_QUEUE_INIT_DONE:
 		for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
 			if (!(oct->io_qmask.iq & BIT_ULL(i)))
@@ -563,27 +562,27 @@ static void octeon_destroy_resources(struct octeon_device *oct)
 			octeon_delete_instr_queue(oct, i);
 		}
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_SC_BUFF_POOL_INIT_DONE:
 		octeon_free_sc_buffer_pool(oct);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_DISPATCH_INIT_DONE:
 		octeon_delete_dispatch_list(oct);
 		cancel_delayed_work_sync(&oct->nic_poll_work.work);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_PCI_MAP_DONE:
 		octeon_unmap_pci_barx(oct, 0);
 		octeon_unmap_pci_barx(oct, 1);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_PCI_ENABLE_DONE:
 		pci_clear_master(oct->pci_dev);
 		/* Disable the device, releasing the PCI INT */
 		pci_disable_device(oct->pci_dev);
 
-		/* fallthrough */
+		fallthrough;
 	case OCT_DEV_BEGIN_STATE:
 		/* Nothing to be done here either */
 		break;
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c b/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c
index 83dabcffc789a..c7bdac79299ac 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_ethtool.c
@@ -522,7 +522,7 @@ static int nicvf_get_rss_hash_opts(struct nicvf *nic,
 	case SCTP_V4_FLOW:
 	case SCTP_V6_FLOW:
 		info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
-		/* Fall through */
+		fallthrough;
 	case IPV4_FLOW:
 	case IPV6_FLOW:
 		info->data |= RXH_IP_SRC | RXH_IP_DST;
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index c1378b5c780cf..063e560d9c1b3 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -594,10 +594,10 @@ static inline bool nicvf_xdp_rx(struct nicvf *nic, struct bpf_prog *prog,
 		return true;
 	default:
 		bpf_warn_invalid_xdp_action(action);
-		/* fall through */
+		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(nic->netdev, prog, action);
-		/* fall through */
+		fallthrough;
 	case XDP_DROP:
 		/* Check if it's a recycled page, if not
 		 * unmap the DMA mapping.
diff --git a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
index 42c6e9379882f..387c357e1b8e2 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/cxgb3_main.c
@@ -2543,7 +2543,7 @@ static int cxgb_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
 		    !(data->phy_id & 0xe0e0))
 			data->phy_id = mdio_phy_id_c45(data->phy_id >> 8,
 						       data->phy_id & 0x1f);
-		/* FALLTHRU */
+		fallthrough;
 	case SIOCGMIIPHY:
 		return mdio_mii_ioctl(&pi->phy.mdio, data, cmd);
 	case SIOCCHIOCTL:
diff --git a/drivers/net/ethernet/chelsio/cxgb3/l2t.c b/drivers/net/ethernet/chelsio/cxgb3/l2t.c
index b3e4118a15e70..9749d1239f58e 100644
--- a/drivers/net/ethernet/chelsio/cxgb3/l2t.c
+++ b/drivers/net/ethernet/chelsio/cxgb3/l2t.c
@@ -136,7 +136,7 @@ int t3_l2t_send_slow(struct t3cdev *dev, struct sk_buff *skb,
 		if (e->state == L2T_STATE_STALE)
 			e->state = L2T_STATE_VALID;
 		spin_unlock_bh(&e->lock);
-		/* fall through */
+		fallthrough;
 	case L2T_STATE_VALID:	/* fast-path, send the packet on */
 		return cxgb3_ofld_send(dev, skb);
 	case L2T_STATE_RESOLVING:
diff --git a/drivers/net/ethernet/chelsio/cxgb4/l2t.c b/drivers/net/ethernet/chelsio/cxgb4/l2t.c
index c4864125fe026..a10a6862a9a46 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/l2t.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/l2t.c
@@ -231,7 +231,7 @@ int cxgb4_l2t_send(struct net_device *dev, struct sk_buff *skb,
 		if (e->state == L2T_STATE_STALE)
 			e->state = L2T_STATE_VALID;
 		spin_unlock_bh(&e->lock);
-		/* fall through */
+		fallthrough;
 	case L2T_STATE_VALID:     /* fast-path, send the packet on */
 		return t4_ofld_send(adap, skb);
 	case L2T_STATE_RESOLVING:
diff --git a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
index 8a56491bb0341..fa3367966f4b5 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/t4_hw.c
@@ -7656,13 +7656,13 @@ int t4_alloc_vi(struct adapter *adap, unsigned int mbox, unsigned int port,
 		switch (nmac) {
 		case 5:
 			memcpy(mac + 24, c.nmac3, sizeof(c.nmac3));
-			/* Fall through */
+			fallthrough;
 		case 4:
 			memcpy(mac + 18, c.nmac2, sizeof(c.nmac2));
-			/* Fall through */
+			fallthrough;
 		case 3:
 			memcpy(mac + 12, c.nmac1, sizeof(c.nmac1));
-			/* Fall through */
+			fallthrough;
 		case 2:
 			memcpy(mac + 6,  c.nmac0, sizeof(c.nmac0));
 		}
diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
index dbe8ee7e0e212..e2fe78e2e2424 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
@@ -517,7 +517,7 @@ static int fwevtq_handler(struct sge_rspq *rspq, const __be64 *rsp,
 		}
 		cpl = (void *)p;
 	}
-		/* Fall through */
+		fallthrough;
 
 	case CPL_SGE_EGR_UPDATE: {
 		/*
diff --git a/drivers/net/ethernet/cisco/enic/enic_main.c b/drivers/net/ethernet/cisco/enic/enic_main.c
index 6bc7e7ba38c3d..552d89fdf54a5 100644
--- a/drivers/net/ethernet/cisco/enic/enic_main.c
+++ b/drivers/net/ethernet/cisco/enic/enic_main.c
@@ -272,7 +272,7 @@ static netdev_features_t enic_features_check(struct sk_buff *skb,
 	case ntohs(ETH_P_IPV6):
 		if (!(enic->vxlan.flags & ENIC_VXLAN_INNER_IPV6))
 			goto out;
-		/* Fall through */
+		fallthrough;
 	case ntohs(ETH_P_IP):
 		break;
 	default:
diff --git a/drivers/net/ethernet/davicom/dm9000.c b/drivers/net/ethernet/davicom/dm9000.c
index 7f77051382620..5c6c8c5ec7471 100644
--- a/drivers/net/ethernet/davicom/dm9000.c
+++ b/drivers/net/ethernet/davicom/dm9000.c
@@ -385,7 +385,7 @@ static void dm9000_set_io(struct board_info *db, int byte_width)
 
 	case 3:
 		dev_dbg(db->dev, ": 3 byte IO, falling back to 16bit\n");
-		/* fall through */
+		fallthrough;
 	case 2:
 		db->dumpblk = dm9000_dumpblk_16bit;
 		db->outblk  = dm9000_outblk_16bit;
diff --git a/drivers/net/ethernet/dec/tulip/de4x5.c b/drivers/net/ethernet/dec/tulip/de4x5.c
index 0ccd9994ad457..f9dd1aa9f2da3 100644
--- a/drivers/net/ethernet/dec/tulip/de4x5.c
+++ b/drivers/net/ethernet/dec/tulip/de4x5.c
@@ -3203,7 +3203,7 @@ srom_map_media(struct net_device *dev)
       case SROM_10BASETF:
 	if (!lp->params.fdx) return -1;
 	lp->fdx = true;
-	/* fall through */
+	fallthrough;
 
       case SROM_10BASET:
 	if (lp->params.fdx && !lp->fdx) return -1;
@@ -3225,7 +3225,7 @@ srom_map_media(struct net_device *dev)
       case SROM_100BASETF:
         if (!lp->params.fdx) return -1;
 	lp->fdx = true;
-	/* fall through */
+	fallthrough;
 
       case SROM_100BASET:
 	if (lp->params.fdx && !lp->fdx) return -1;
@@ -3239,7 +3239,7 @@ srom_map_media(struct net_device *dev)
       case SROM_100BASEFF:
 	if (!lp->params.fdx) return -1;
 	lp->fdx = true;
-	/* fall through */
+	fallthrough;
 
       case SROM_100BASEF:
 	if (lp->params.fdx && !lp->fdx) return -1;
diff --git a/drivers/net/ethernet/dec/tulip/tulip_core.c b/drivers/net/ethernet/dec/tulip/tulip_core.c
index 9db23527275a3..3a8659c5da064 100644
--- a/drivers/net/ethernet/dec/tulip/tulip_core.c
+++ b/drivers/net/ethernet/dec/tulip/tulip_core.c
@@ -911,7 +911,7 @@ static int private_ioctl (struct net_device *dev, struct ifreq *rq, int cmd)
 			data->phy_id = 1;
 		else
 			return -ENODEV;
-		/* Fall through */
+		fallthrough;
 
 	case SIOCGMIIREG:		/* Read MII PHY register. */
 		if (data->phy_id == 32 && (tp->flags & HAS_NWAY)) {
diff --git a/drivers/net/ethernet/dec/tulip/winbond-840.c b/drivers/net/ethernet/dec/tulip/winbond-840.c
index 5dcc66f601444..5a43be327f588 100644
--- a/drivers/net/ethernet/dec/tulip/winbond-840.c
+++ b/drivers/net/ethernet/dec/tulip/winbond-840.c
@@ -1443,7 +1443,7 @@ static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 	switch(cmd) {
 	case SIOCGMIIPHY:		/* Get address of MII PHY in use. */
 		data->phy_id = ((struct netdev_private *)netdev_priv(dev))->phys[0] & 0x1f;
-		/* Fall Through */
+		fallthrough;
 
 	case SIOCGMIIREG:		/* Read MII PHY register. */
 		spin_lock_irq(&np->lock);
diff --git a/drivers/net/ethernet/emulex/benet/be_ethtool.c b/drivers/net/ethernet/emulex/benet/be_ethtool.c
index d6ed1d9437625..99cc1c46fb301 100644
--- a/drivers/net/ethernet/emulex/benet/be_ethtool.c
+++ b/drivers/net/ethernet/emulex/benet/be_ethtool.c
@@ -571,7 +571,7 @@ static u32 convert_to_et_setting(struct be_adapter *adapter, u32 if_speeds)
 				break;
 			}
 		}
-		/* fall through */
+		fallthrough;
 	case PHY_TYPE_SFP_PLUS_10GB:
 	case PHY_TYPE_XFP_10GB:
 	case PHY_TYPE_SFP_1GB:
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
index 43570f4911ea1..fdff3b4723bad 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_eth.c
@@ -945,7 +945,7 @@ static void dpaa_fq_setup(struct dpaa_priv *priv,
 			break;
 		case FQ_TYPE_TX_CONF_MQ:
 			priv->conf_fqs[conf_cnt++] = &fq->fq_base;
-			/* fall through */
+			fallthrough;
 		case FQ_TYPE_TX_CONFIRM:
 			dpaa_setup_ingress(priv, fq, &fq_cbs->tx_defq);
 			break;
diff --git a/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c b/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
index 9db2a02fb5317..1268996b70301 100644
--- a/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
+++ b/drivers/net/ethernet/freescale/dpaa/dpaa_ethtool.c
@@ -375,7 +375,7 @@ static int dpaa_get_hash_opts(struct net_device *dev,
 	case UDP_V6_FLOW:
 		if (priv->keygen_in_use)
 			cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
-		/* Fall through */
+		fallthrough;
 	case IPV4_FLOW:
 	case IPV6_FLOW:
 	case SCTP_V4_FLOW:
diff --git a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
index 457106e761be0..cf5383bb83319 100644
--- a/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
+++ b/drivers/net/ethernet/freescale/dpaa2/dpaa2-eth.c
@@ -376,10 +376,10 @@ static u32 run_xdp(struct dpaa2_eth_priv *priv,
 		break;
 	default:
 		bpf_warn_invalid_xdp_action(xdp_act);
-		/* fall through */
+		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(priv->net_dev, xdp_prog, xdp_act);
-		/* fall through */
+		fallthrough;
 	case XDP_DROP:
 		xdp_release_buf(priv, ch, addr);
 		ch->stats.xdp_drop++;
diff --git a/drivers/net/ethernet/freescale/fman/fman_memac.c b/drivers/net/ethernet/freescale/fman/fman_memac.c
index 645764abdaae5..bb9887f988411 100644
--- a/drivers/net/ethernet/freescale/fman/fman_memac.c
+++ b/drivers/net/ethernet/freescale/fman/fman_memac.c
@@ -528,7 +528,7 @@ static void setup_sgmii_internal_phy(struct fman_mac *memac,
 		case 100:
 			tmp_reg16 |= IF_MODE_SGMII_SPEED_100M;
 		break;
-		case 1000: /* fallthrough */
+		case 1000:
 		default:
 			tmp_reg16 |= IF_MODE_SGMII_SPEED_1G;
 		break;
diff --git a/drivers/net/ethernet/freescale/fman/fman_port.c b/drivers/net/ethernet/freescale/fman/fman_port.c
index c27df153f8959..624b2eb6f01de 100644
--- a/drivers/net/ethernet/freescale/fman/fman_port.c
+++ b/drivers/net/ethernet/freescale/fman/fman_port.c
@@ -1344,10 +1344,10 @@ int fman_port_config(struct fman_port *port, struct fman_port_params *params)
 	switch (port->port_type) {
 	case FMAN_PORT_TYPE_RX:
 		set_rx_dflt_cfg(port, params);
-		/* fall through */
+		fallthrough;
 	case FMAN_PORT_TYPE_TX:
 		set_tx_dflt_cfg(port, params, &port->dts_params);
-		/* fall through */
+		fallthrough;
 	default:
 		set_dflt_cfg(port, params);
 	}
diff --git a/drivers/net/ethernet/freescale/ucc_geth.c b/drivers/net/ethernet/freescale/ucc_geth.c
index db791f60b8846..714b501be7d09 100644
--- a/drivers/net/ethernet/freescale/ucc_geth.c
+++ b/drivers/net/ethernet/freescale/ucc_geth.c
@@ -1348,7 +1348,7 @@ static int adjust_enet_interface(struct ucc_geth_private *ugeth)
 		switch (ugeth->max_speed) {
 		case SPEED_10:
 			upsmr |= UCC_GETH_UPSMR_R10M;
-			/* FALLTHROUGH */
+			fallthrough;
 		case SPEED_100:
 			if (ugeth->phy_interface != PHY_INTERFACE_MODE_RTBI)
 				upsmr |= UCC_GETH_UPSMR_RMM;
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
index 49624acf24739..4eb50296f6538 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_ethtool.c
@@ -305,7 +305,7 @@ static int __lb_setup(struct net_device *ndev,
 		break;
 	case MAC_LOOP_PHY_NONE:
 		ret = hns_nic_config_phy_loopback(phy_dev, 0x0);
-		/* fall through */
+		fallthrough;
 	case MAC_LOOP_NONE:
 		if (!ret && h->dev->ops->set_loopback) {
 			if (priv->ae_handle->phy_if != PHY_INTERFACE_MODE_XGMII)
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 87776ce3539b4..c2ea0348b2f7e 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -2746,7 +2746,7 @@ static void hns3_rx_checksum(struct hns3_enet_ring *ring, struct sk_buff *skb,
 	case HNS3_OL4_TYPE_MAC_IN_UDP:
 	case HNS3_OL4_TYPE_NVGRE:
 		skb->csum_level = 1;
-		/* fall through */
+		fallthrough;
 	case HNS3_OL4_TYPE_NO_TUN:
 		l3_type = hnae3_get_field(l234info, HNS3_RXD_L3ID_M,
 					  HNS3_RXD_L3ID_S);
diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
index 36575e72a915e..d553ed7ee64c0 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_main.c
@@ -3061,7 +3061,7 @@ static irqreturn_t hclge_misc_irq_handle(int irq, void *data)
 		 *    by first decoding the types of errors.
 		 */
 		set_bit(HNAE3_UNKNOWN_RESET, &hdev->reset_request);
-		/* fall through */
+		fallthrough;
 	case HCLGE_VECTOR0_EVENT_RST:
 		hclge_reset_task_schedule(hdev);
 		break;
@@ -3686,12 +3686,10 @@ static int hclge_reset_prepare_up(struct hclge_dev *hdev)
 
 	switch (hdev->reset_type) {
 	case HNAE3_FUNC_RESET:
-		/* fall through */
 	case HNAE3_FLR_RESET:
 		ret = hclge_set_all_vf_rst(hdev, false);
 		break;
 	case HNAE3_GLOBAL_RESET:
-		/* fall through */
 	case HNAE3_IMP_RESET:
 		ret = hclge_set_rst_done(hdev);
 		break;
diff --git a/drivers/net/ethernet/ibm/ehea/ehea_main.c b/drivers/net/ethernet/ibm/ehea/ehea_main.c
index 0273fb7a9d015..3153d62cc73e3 100644
--- a/drivers/net/ethernet/ibm/ehea/ehea_main.c
+++ b/drivers/net/ethernet/ibm/ehea/ehea_main.c
@@ -3247,7 +3247,7 @@ static int ehea_mem_notifier(struct notifier_block *nb,
 	switch (action) {
 	case MEM_CANCEL_OFFLINE:
 		pr_info("memory offlining canceled");
-		/* Fall through - re-add canceled memory block */
+		fallthrough;	/* re-add canceled memory block */
 
 	case MEM_ONLINE:
 		pr_info("memory is going online");
diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c
index 06248a7db7f26..c00b9097eeea4 100644
--- a/drivers/net/ethernet/ibm/emac/core.c
+++ b/drivers/net/ethernet/ibm/emac/core.c
@@ -2319,7 +2319,7 @@ static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd)
 	switch (cmd) {
 	case SIOCGMIIPHY:
 		data->phy_id = dev->phy.address;
-		/* Fall through */
+		fallthrough;
 	case SIOCGMIIREG:
 		data->val_out = emac_mdio_read(ndev, dev->phy.address,
 					       data->reg_num);
diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
index 63dde3bcf5bc7..664e8ccc88d22 100644
--- a/drivers/net/ethernet/intel/e1000e/netdev.c
+++ b/drivers/net/ethernet/intel/e1000e/netdev.c
@@ -4079,7 +4079,6 @@ void e1000e_reset(struct e1000_adapter *adapter)
 	case e1000_pch_lpt:
 	case e1000_pch_spt:
 	case e1000_pch_cnp:
-		fallthrough;
 	case e1000_pch_tgp:
 	case e1000_pch_adp:
 		fc->refresh_time = 0xFFFF;
diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index 4f05f6efe6af1..d9c3a6b169f90 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -718,7 +718,6 @@ static void igb_cache_ring_register(struct igb_adapter *adapter)
 	case e1000_i354:
 	case e1000_i210:
 	case e1000_i211:
-		fallthrough;
 	default:
 		for (; i < adapter->num_rx_queues; i++)
 			adapter->rx_ring[i]->reg_idx = rbase_offset + i;
diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c
index 832bbb8b05c80..dfcb1767acbb3 100644
--- a/drivers/net/ethernet/marvell/mvneta.c
+++ b/drivers/net/ethernet/marvell/mvneta.c
@@ -2205,10 +2205,10 @@ mvneta_run_xdp(struct mvneta_port *pp, struct mvneta_rx_queue *rxq,
 		break;
 	default:
 		bpf_warn_invalid_xdp_action(act);
-		/* fall through */
+		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(pp->dev, prog, act);
-		/* fall through */
+		fallthrough;
 	case XDP_DROP:
 		mvneta_xdp_put_buff(pp, rxq, xdp, sync, true);
 		ret = MVNETA_XDP_DROPPED;
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
index d4a4e241333d8..41d935d1aaf6f 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_cls.c
@@ -1638,7 +1638,7 @@ int mvpp2_ethtool_rxfh_set(struct mvpp2_port *port, struct ethtool_rxnfc *info)
 			hash_opts |= MVPP22_CLS_HEK_OPT_L4SIP;
 		if (info->data & RXH_L4_B_2_3)
 			hash_opts |= MVPP22_CLS_HEK_OPT_L4DIP;
-		/* Fallthrough */
+		fallthrough;
 	case MVPP22_FLOW_IP4:
 	case MVPP22_FLOW_IP6:
 		if (info->data & RXH_L2DA)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index 2a8a5842eaefd..6e140d1b8967c 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
@@ -5437,7 +5437,7 @@ static void mvpp2_phylink_validate(struct phylink_config *config,
 		}
 		if (state->interface != PHY_INTERFACE_MODE_NA)
 			break;
-		/* Fall-through */
+		fallthrough;
 	case PHY_INTERFACE_MODE_RGMII:
 	case PHY_INTERFACE_MODE_RGMII_ID:
 	case PHY_INTERFACE_MODE_RGMII_RXID:
@@ -5451,7 +5451,7 @@ static void mvpp2_phylink_validate(struct phylink_config *config,
 		phylink_set(mask, 1000baseX_Full);
 		if (state->interface != PHY_INTERFACE_MODE_NA)
 			break;
-		/* Fall-through */
+		fallthrough;
 	case PHY_INTERFACE_MODE_1000BASEX:
 	case PHY_INTERFACE_MODE_2500BASEX:
 		if (port->comphy ||
diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
index 36953d4f51c73..01a793105599f 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_nix.c
@@ -737,7 +737,7 @@ static int rvu_nix_aq_enq_inst(struct rvu *rvu, struct nix_aq_enq_req *req,
 		else if (req->ctype == NIX_AQ_CTYPE_MCE)
 			memcpy(mask, &req->mce_mask,
 			       sizeof(struct nix_rx_mce_s));
-		/* Fall through */
+		fallthrough;
 	case NIX_AQ_INSTOP_INIT:
 		if (req->ctype == NIX_AQ_CTYPE_RQ)
 			memcpy(ctx, &req->rq, sizeof(struct nix_rq_ctx_s));
diff --git a/drivers/net/ethernet/marvell/skge.c b/drivers/net/ethernet/marvell/skge.c
index b792f6306a641..6a930351cb239 100644
--- a/drivers/net/ethernet/marvell/skge.c
+++ b/drivers/net/ethernet/marvell/skge.c
@@ -2448,7 +2448,7 @@ static int skge_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	case SIOCGMIIPHY:
 		data->phy_id = hw->phy_addr;
 
-		/* fallthru */
+		fallthrough;
 	case SIOCGMIIREG: {
 		u16 val = 0;
 		spin_lock_bh(&hw->phy_lock);
diff --git a/drivers/net/ethernet/marvell/sky2.c b/drivers/net/ethernet/marvell/sky2.c
index cec8124301c7f..344864275ed56 100644
--- a/drivers/net/ethernet/marvell/sky2.c
+++ b/drivers/net/ethernet/marvell/sky2.c
@@ -1376,7 +1376,7 @@ static int sky2_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	case SIOCGMIIPHY:
 		data->phy_id = PHY_ADDR_MARV;
 
-		/* fallthru */
+		fallthrough;
 	case SIOCGMIIREG: {
 		u16 val = 0;
 
@@ -2764,7 +2764,7 @@ static int sky2_status_intr(struct sky2_hw *hw, int to_do, u16 idx)
 
 		case OP_RXCHKSVLAN:
 			sky2_rx_tag(sky2, length);
-			/* fall through */
+			fallthrough;
 		case OP_RXCHKS:
 			if (likely(dev->features & NETIF_F_RXCSUM))
 				sky2_rx_checksum(sky2, status);
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 0870fe78ea38c..6d2d60675ffd7 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -228,7 +228,7 @@ static void mtk_mac_config(struct phylink_config *config, unsigned int mode,
 			if (!MTK_HAS_CAPS(mac->hw->soc->caps,
 					  MTK_GMAC1_TRGMII))
 				goto err_phy;
-			/* fall through */
+			fallthrough;
 		case PHY_INTERFACE_MODE_RGMII_TXID:
 		case PHY_INTERFACE_MODE_RGMII_RXID:
 		case PHY_INTERFACE_MODE_RGMII_ID:
@@ -501,11 +501,11 @@ static void mtk_validate(struct phylink_config *config,
 	case PHY_INTERFACE_MODE_RGMII_RXID:
 	case PHY_INTERFACE_MODE_RGMII_TXID:
 		phylink_set(mask, 1000baseT_Half);
-		/* fall through */
+		fallthrough;
 	case PHY_INTERFACE_MODE_SGMII:
 		phylink_set(mask, 1000baseT_Full);
 		phylink_set(mask, 1000baseX_Full);
-		/* fall through */
+		fallthrough;
 	case PHY_INTERFACE_MODE_MII:
 	case PHY_INTERFACE_MODE_RMII:
 	case PHY_INTERFACE_MODE_REVMII:
diff --git a/drivers/net/ethernet/mellanox/mlxfw/mlxfw_fsm.c b/drivers/net/ethernet/mellanox/mlxfw/mlxfw_fsm.c
index 7a04c626a2aa5..bcd166911d444 100644
--- a/drivers/net/ethernet/mellanox/mlxfw/mlxfw_fsm.c
+++ b/drivers/net/ethernet/mellanox/mlxfw/mlxfw_fsm.c
@@ -72,7 +72,7 @@ static int mlxfw_fsm_state_err(struct mlxfw_dev *mlxfw_dev,
 	case MLXFW_FSM_STATE_ERR_BLOCKED_PENDING_RESET:
 		MLXFW_ERR_MSG(mlxfw_dev, extack, "pending reset", err);
 		break;
-	case MLXFW_FSM_STATE_ERR_OK: /* fall through */
+	case MLXFW_FSM_STATE_ERR_OK:
 	case MLXFW_FSM_STATE_ERR_MAX:
 		MLXFW_ERR_MSG(mlxfw_dev, extack, "unknown error", err);
 		break;
@@ -155,7 +155,7 @@ mlxfw_fsm_reactivate_err(struct mlxfw_dev *mlxfw_dev,
 	case MLXFW_FSM_REACTIVATE_STATUS_FW_ALREADY_ACTIVATED:
 		MLXFW_REACT_ERR("fw already activated", err);
 		break;
-	case MLXFW_FSM_REACTIVATE_STATUS_OK: /* fall through */
+	case MLXFW_FSM_REACTIVATE_STATUS_OK:
 	case MLXFW_FSM_REACTIVATE_STATUS_MAX:
 		MLXFW_REACT_ERR("unexpected error", err);
 		break;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core.c b/drivers/net/ethernet/mellanox/mlxsw/core.c
index 08d101138fbe1..ec45a03140d7f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core.c
@@ -2289,21 +2289,21 @@ int mlxsw_core_module_max_width(struct mlxsw_core *mlxsw_core, u8 module)
 	/* Here we need to get the module width according to the module type. */
 
 	switch (module_type) {
-	case MLXSW_REG_PMTM_MODULE_TYPE_C2C8X: /* fall through */
-	case MLXSW_REG_PMTM_MODULE_TYPE_QSFP_DD: /* fall through */
+	case MLXSW_REG_PMTM_MODULE_TYPE_C2C8X:
+	case MLXSW_REG_PMTM_MODULE_TYPE_QSFP_DD:
 	case MLXSW_REG_PMTM_MODULE_TYPE_OSFP:
 		return 8;
-	case MLXSW_REG_PMTM_MODULE_TYPE_C2C4X: /* fall through */
-	case MLXSW_REG_PMTM_MODULE_TYPE_BP_4X: /* fall through */
+	case MLXSW_REG_PMTM_MODULE_TYPE_C2C4X:
+	case MLXSW_REG_PMTM_MODULE_TYPE_BP_4X:
 	case MLXSW_REG_PMTM_MODULE_TYPE_QSFP:
 		return 4;
-	case MLXSW_REG_PMTM_MODULE_TYPE_C2C2X: /* fall through */
-	case MLXSW_REG_PMTM_MODULE_TYPE_BP_2X: /* fall through */
-	case MLXSW_REG_PMTM_MODULE_TYPE_SFP_DD: /* fall through */
+	case MLXSW_REG_PMTM_MODULE_TYPE_C2C2X:
+	case MLXSW_REG_PMTM_MODULE_TYPE_BP_2X:
+	case MLXSW_REG_PMTM_MODULE_TYPE_SFP_DD:
 	case MLXSW_REG_PMTM_MODULE_TYPE_DSFP:
 		return 2;
-	case MLXSW_REG_PMTM_MODULE_TYPE_C2C1X: /* fall through */
-	case MLXSW_REG_PMTM_MODULE_TYPE_BP_1X: /* fall through */
+	case MLXSW_REG_PMTM_MODULE_TYPE_C2C1X:
+	case MLXSW_REG_PMTM_MODULE_TYPE_BP_1X:
 	case MLXSW_REG_PMTM_MODULE_TYPE_SFP:
 		return 1;
 	default:
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_env.c b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
index 44fa02cbb683d..056eeb85be604 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_env.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_env.c
@@ -30,8 +30,8 @@ static int mlxsw_env_validate_cable_ident(struct mlxsw_core *core, int id,
 	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_SFP:
 		*qsfp = false;
 		break;
-	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP: /* fall-through */
-	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS: /* fall-through */
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP:
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS:
 	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28:
 		*qsfp = true;
 		break;
@@ -205,7 +205,7 @@ int mlxsw_env_get_module_info(struct mlxsw_core *mlxsw_core, int module,
 		modinfo->type       = ETH_MODULE_SFF_8436;
 		modinfo->eeprom_len = ETH_MODULE_SFF_8436_MAX_LEN;
 		break;
-	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS: /* fall-through */
+	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS:
 	case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28:
 		if (module_id == MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28 ||
 		    module_rev_id >=
diff --git a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
index 3fe878d7c94cb..61719ec89808f 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/core_hwmon.c
@@ -259,8 +259,8 @@ static ssize_t mlxsw_hwmon_module_temp_fault_show(struct device *dev,
 		 */
 		fault = 1;
 		break;
-	case MLXSW_REG_MTBR_NO_CONN: /* fall-through */
-	case MLXSW_REG_MTBR_NO_TEMP_SENS: /* fall-through */
+	case MLXSW_REG_MTBR_NO_CONN:
+	case MLXSW_REG_MTBR_NO_TEMP_SENS:
 	case MLXSW_REG_MTBR_INDEX_NA:
 	default:
 		fault = 0;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
index fdf9aa8314b29..4186e29119c27 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.c
@@ -517,8 +517,8 @@ enum mlxsw_reg_spms_state mlxsw_sp_stp_spms_state(u8 state)
 		return MLXSW_REG_SPMS_STATE_FORWARDING;
 	case BR_STATE_LEARNING:
 		return MLXSW_REG_SPMS_STATE_LEARNING;
-	case BR_STATE_LISTENING: /* fall-through */
-	case BR_STATE_DISABLED: /* fall-through */
+	case BR_STATE_LISTENING:
+	case BR_STATE_DISABLED:
 	case BR_STATE_BLOCKING:
 		return MLXSW_REG_SPMS_STATE_DISCARDING;
 	default:
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
index f9ba59641b4df..5240bf11b6c42 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum.h
@@ -636,11 +636,11 @@ static inline unsigned int
 mlxsw_sp_kvdl_entry_size(enum mlxsw_sp_kvdl_entry_type type)
 {
 	switch (type) {
-	case MLXSW_SP_KVDL_ENTRY_TYPE_ADJ: /* fall through */
-	case MLXSW_SP_KVDL_ENTRY_TYPE_ACTSET: /* fall through */
-	case MLXSW_SP_KVDL_ENTRY_TYPE_PBS: /* fall through */
-	case MLXSW_SP_KVDL_ENTRY_TYPE_MCRIGR: /* fall through */
-	case MLXSW_SP_KVDL_ENTRY_TYPE_TNUMT: /* fall through */
+	case MLXSW_SP_KVDL_ENTRY_TYPE_ADJ:
+	case MLXSW_SP_KVDL_ENTRY_TYPE_ACTSET:
+	case MLXSW_SP_KVDL_ENTRY_TYPE_PBS:
+	case MLXSW_SP_KVDL_ENTRY_TYPE_MCRIGR:
+	case MLXSW_SP_KVDL_ENTRY_TYPE_TNUMT:
 	default:
 		return 1;
 	}
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
index 0521e9d48c457..24f1fd1f8d561 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c
@@ -1164,7 +1164,7 @@ mlxsw_sp_router_ip2me_fib_entry_find(struct mlxsw_sp *mlxsw_sp, u32 tb_id,
 		addr_len = 4;
 		addr_prefix_len = 32;
 		break;
-	case MLXSW_SP_L3_PROTO_IPV6: /* fall through */
+	case MLXSW_SP_L3_PROTO_IPV6:
 	default:
 		WARN_ON(1);
 		return NULL;
@@ -4555,14 +4555,14 @@ mlxsw_sp_fib4_entry_type_set(struct mlxsw_sp *mlxsw_sp,
 			fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_NVE_DECAP;
 			return 0;
 		}
-		/* fall through */
+		fallthrough;
 	case RTN_BROADCAST:
 		fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_TRAP;
 		return 0;
 	case RTN_BLACKHOLE:
 		fib_entry->type = MLXSW_SP_FIB_ENTRY_TYPE_BLACKHOLE;
 		return 0;
-	case RTN_UNREACHABLE: /* fall through */
+	case RTN_UNREACHABLE:
 	case RTN_PROHIBIT:
 		/* Packets hitting these routes need to be trapped, but
 		 * can do so with a lower priority than packets directed
@@ -5990,7 +5990,7 @@ static void mlxsw_sp_router_fib4_event_work(struct work_struct *work)
 		mlxsw_sp_router_fib4_del(mlxsw_sp, &fib_work->fen_info);
 		fib_info_put(fib_work->fen_info.fi);
 		break;
-	case FIB_EVENT_NH_ADD: /* fall through */
+	case FIB_EVENT_NH_ADD:
 	case FIB_EVENT_NH_DEL:
 		mlxsw_sp_nexthop4_event(mlxsw_sp, fib_work->event,
 					fib_work->fnh_info.fib_nh);
@@ -6050,7 +6050,7 @@ static void mlxsw_sp_router_fibmr_event_work(struct work_struct *work)
 	rtnl_lock();
 	mutex_lock(&mlxsw_sp->router->lock);
 	switch (fib_work->event) {
-	case FIB_EVENT_ENTRY_REPLACE: /* fall through */
+	case FIB_EVENT_ENTRY_REPLACE:
 	case FIB_EVENT_ENTRY_ADD:
 		replace = fib_work->event == FIB_EVENT_ENTRY_REPLACE;
 
@@ -6089,7 +6089,7 @@ static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work,
 	struct fib_nh_notifier_info *fnh_info;
 
 	switch (fib_work->event) {
-	case FIB_EVENT_ENTRY_REPLACE: /* fall through */
+	case FIB_EVENT_ENTRY_REPLACE:
 	case FIB_EVENT_ENTRY_DEL:
 		fen_info = container_of(info, struct fib_entry_notifier_info,
 					info);
@@ -6099,7 +6099,7 @@ static void mlxsw_sp_router_fib4_event(struct mlxsw_sp_fib_event_work *fib_work,
 		 */
 		fib_info_hold(fib_work->fen_info.fi);
 		break;
-	case FIB_EVENT_NH_ADD: /* fall through */
+	case FIB_EVENT_NH_ADD:
 	case FIB_EVENT_NH_DEL:
 		fnh_info = container_of(info, struct fib_nh_notifier_info,
 					info);
@@ -6116,8 +6116,8 @@ static int mlxsw_sp_router_fib6_event(struct mlxsw_sp_fib_event_work *fib_work,
 	int err;
 
 	switch (fib_work->event) {
-	case FIB_EVENT_ENTRY_REPLACE: /* fall through */
-	case FIB_EVENT_ENTRY_APPEND: /* fall through */
+	case FIB_EVENT_ENTRY_REPLACE:
+	case FIB_EVENT_ENTRY_APPEND:
 	case FIB_EVENT_ENTRY_DEL:
 		fen6_info = container_of(info, struct fib6_entry_notifier_info,
 					 info);
@@ -6136,13 +6136,13 @@ mlxsw_sp_router_fibmr_event(struct mlxsw_sp_fib_event_work *fib_work,
 			    struct fib_notifier_info *info)
 {
 	switch (fib_work->event) {
-	case FIB_EVENT_ENTRY_REPLACE: /* fall through */
-	case FIB_EVENT_ENTRY_ADD: /* fall through */
+	case FIB_EVENT_ENTRY_REPLACE:
+	case FIB_EVENT_ENTRY_ADD:
 	case FIB_EVENT_ENTRY_DEL:
 		memcpy(&fib_work->men_info, info, sizeof(fib_work->men_info));
 		mr_cache_hold(fib_work->men_info.mfc);
 		break;
-	case FIB_EVENT_VIF_ADD: /* fall through */
+	case FIB_EVENT_VIF_ADD:
 	case FIB_EVENT_VIF_DEL:
 		memcpy(&fib_work->ven_info, info, sizeof(fib_work->ven_info));
 		dev_hold(fib_work->ven_info.dev);
@@ -6215,13 +6215,13 @@ static int mlxsw_sp_router_fib_event(struct notifier_block *nb,
 	router = container_of(nb, struct mlxsw_sp_router, fib_nb);
 
 	switch (event) {
-	case FIB_EVENT_RULE_ADD: /* fall through */
+	case FIB_EVENT_RULE_ADD:
 	case FIB_EVENT_RULE_DEL:
 		err = mlxsw_sp_router_fib_rule_event(event, info,
 						     router->mlxsw_sp);
 		return notifier_from_errno(err);
-	case FIB_EVENT_ENTRY_ADD: /* fall through */
-	case FIB_EVENT_ENTRY_REPLACE: /* fall through */
+	case FIB_EVENT_ENTRY_ADD:
+	case FIB_EVENT_ENTRY_REPLACE:
 	case FIB_EVENT_ENTRY_APPEND:
 		if (router->aborted) {
 			NL_SET_ERR_MSG_MOD(info->extack, "FIB offload was aborted. Not configuring route");
@@ -7277,7 +7277,7 @@ int mlxsw_sp_netdevice_router_port_event(struct net_device *dev,
 		goto out;
 
 	switch (event) {
-	case NETDEV_CHANGEMTU: /* fall through */
+	case NETDEV_CHANGEMTU:
 	case NETDEV_CHANGEADDR:
 		err = mlxsw_sp_router_port_change_event(mlxsw_sp, rif);
 		break;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
index 5c959a9951996..1d18e41ab2553 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c
@@ -1523,12 +1523,12 @@ mlxsw_sp_span_trigger_ops_set(struct mlxsw_sp_span_trigger_entry *trigger_entry)
 	enum mlxsw_sp_span_trigger_type type;
 
 	switch (trigger_entry->trigger) {
-	case MLXSW_SP_SPAN_TRIGGER_INGRESS: /* fall-through */
+	case MLXSW_SP_SPAN_TRIGGER_INGRESS:
 	case MLXSW_SP_SPAN_TRIGGER_EGRESS:
 		type = MLXSW_SP_SPAN_TRIGGER_TYPE_PORT;
 		break;
-	case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP: /* fall-through */
-	case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP: /* fall-through */
+	case MLXSW_SP_SPAN_TRIGGER_TAIL_DROP:
+	case MLXSW_SP_SPAN_TRIGGER_EARLY_DROP:
 	case MLXSW_SP_SPAN_TRIGGER_ECN:
 		type = MLXSW_SP_SPAN_TRIGGER_TYPE_GLOBAL;
 		break;
diff --git a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
index a26162b08b7d8..72912afa6f72a 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/spectrum_switchdev.c
@@ -1297,7 +1297,7 @@ static int mlxsw_sp_port_fdb_tunnel_uc_op(struct mlxsw_sp *mlxsw_sp,
 		uip = be32_to_cpu(addr->addr4);
 		sfd_proto = MLXSW_REG_SFD_UC_TUNNEL_PROTOCOL_IPV4;
 		break;
-	case MLXSW_SP_L3_PROTO_IPV6: /* fall through */
+	case MLXSW_SP_L3_PROTO_IPV6:
 	default:
 		WARN_ON(1);
 		return -EOPNOTSUPP;
@@ -2870,7 +2870,7 @@ static void mlxsw_sp_switchdev_bridge_fdb_event_work(struct work_struct *work)
 		fdb_info = &switchdev_work->fdb_info;
 		mlxsw_sp_port_fdb_set(mlxsw_sp_port, fdb_info, false);
 		break;
-	case SWITCHDEV_FDB_ADD_TO_BRIDGE: /* fall through */
+	case SWITCHDEV_FDB_ADD_TO_BRIDGE:
 	case SWITCHDEV_FDB_DEL_TO_BRIDGE:
 		/* These events are only used to potentially update an existing
 		 * SPAN mirror.
@@ -3116,9 +3116,9 @@ static int mlxsw_sp_switchdev_event(struct notifier_block *unused,
 	switchdev_work->event = event;
 
 	switch (event) {
-	case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
-	case SWITCHDEV_FDB_DEL_TO_DEVICE: /* fall through */
-	case SWITCHDEV_FDB_ADD_TO_BRIDGE: /* fall through */
+	case SWITCHDEV_FDB_ADD_TO_DEVICE:
+	case SWITCHDEV_FDB_DEL_TO_DEVICE:
+	case SWITCHDEV_FDB_ADD_TO_BRIDGE:
 	case SWITCHDEV_FDB_DEL_TO_BRIDGE:
 		fdb_info = container_of(info,
 					struct switchdev_notifier_fdb_info,
@@ -3138,7 +3138,7 @@ static int mlxsw_sp_switchdev_event(struct notifier_block *unused,
 		 */
 		dev_hold(dev);
 		break;
-	case SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE: /* fall through */
+	case SWITCHDEV_VXLAN_FDB_ADD_TO_DEVICE:
 	case SWITCHDEV_VXLAN_FDB_DEL_TO_DEVICE:
 		INIT_WORK(&switchdev_work->work,
 			  mlxsw_sp_switchdev_vxlan_fdb_event_work);
diff --git a/drivers/net/ethernet/microchip/lan743x_ethtool.c b/drivers/net/ethernet/microchip/lan743x_ethtool.c
index c533d06fbe3a5..dcde496da7fb4 100644
--- a/drivers/net/ethernet/microchip/lan743x_ethtool.c
+++ b/drivers/net/ethernet/microchip/lan743x_ethtool.c
@@ -548,7 +548,7 @@ static int lan743x_ethtool_get_rxnfc(struct net_device *netdev,
 		case TCP_V4_FLOW:case UDP_V4_FLOW:
 		case TCP_V6_FLOW:case UDP_V6_FLOW:
 			rxnfc->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
-			/* fall through */
+			fallthrough;
 		case IPV4_FLOW: case IPV6_FLOW:
 			rxnfc->data |= RXH_IP_SRC | RXH_IP_DST;
 			return 0;
diff --git a/drivers/net/ethernet/mscc/ocelot.c b/drivers/net/ethernet/mscc/ocelot.c
index 867c680f59177..5abb7d2b0a9e0 100644
--- a/drivers/net/ethernet/mscc/ocelot.c
+++ b/drivers/net/ethernet/mscc/ocelot.c
@@ -859,7 +859,7 @@ void ocelot_bridge_stp_state_set(struct ocelot *ocelot, int port, u8 state)
 	switch (state) {
 	case BR_STATE_FORWARDING:
 		ocelot->bridge_fwd_mask |= BIT(port);
-		/* Fallthrough */
+		fallthrough;
 	case BR_STATE_LEARNING:
 		port_cfg |= ANA_PORT_PORT_CFG_LEARN_ENA;
 		break;
diff --git a/drivers/net/ethernet/natsemi/natsemi.c b/drivers/net/ethernet/natsemi/natsemi.c
index c2867fe995bc5..3de8430ee8c5d 100644
--- a/drivers/net/ethernet/natsemi/natsemi.c
+++ b/drivers/net/ethernet/natsemi/natsemi.c
@@ -3081,7 +3081,7 @@ static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 	switch(cmd) {
 	case SIOCGMIIPHY:		/* Get address of MII PHY in use. */
 		data->phy_id = np->phy_addr_external;
-		/* Fall Through */
+		fallthrough;
 
 	case SIOCGMIIREG:		/* Read MII PHY register. */
 		/* The phy_id is not enough to uniquely identify
diff --git a/drivers/net/ethernet/neterion/vxge/vxge-config.c b/drivers/net/ethernet/neterion/vxge/vxge-config.c
index 4f1f90f5e178a..78eba10300ae6 100644
--- a/drivers/net/ethernet/neterion/vxge/vxge-config.c
+++ b/drivers/net/ethernet/neterion/vxge/vxge-config.c
@@ -3768,20 +3768,20 @@ vxge_hw_rts_rth_data0_data1_get(u32 j, u64 *data0, u64 *data1,
 			VXGE_HW_RTS_ACCESS_STEER_DATA0_RTH_ITEM0_ENTRY_EN |
 			VXGE_HW_RTS_ACCESS_STEER_DATA0_RTH_ITEM0_BUCKET_DATA(
 			itable[j]);
-		/* fall through */
+		fallthrough;
 	case 2:
 		*data0 |=
 			VXGE_HW_RTS_ACCESS_STEER_DATA0_RTH_ITEM1_BUCKET_NUM(j)|
 			VXGE_HW_RTS_ACCESS_STEER_DATA0_RTH_ITEM1_ENTRY_EN |
 			VXGE_HW_RTS_ACCESS_STEER_DATA0_RTH_ITEM1_BUCKET_DATA(
 			itable[j]);
-		/* fall through */
+		fallthrough;
 	case 3:
 		*data1 = VXGE_HW_RTS_ACCESS_STEER_DATA1_RTH_ITEM0_BUCKET_NUM(j)|
 			VXGE_HW_RTS_ACCESS_STEER_DATA1_RTH_ITEM0_ENTRY_EN |
 			VXGE_HW_RTS_ACCESS_STEER_DATA1_RTH_ITEM0_BUCKET_DATA(
 			itable[j]);
-		/* fall through */
+		fallthrough;
 	case 4:
 		*data1 |=
 			VXGE_HW_RTS_ACCESS_STEER_DATA1_RTH_ITEM1_BUCKET_NUM(j)|
diff --git a/drivers/net/ethernet/netronome/nfp/crypto/tls.c b/drivers/net/ethernet/netronome/nfp/crypto/tls.c
index 7c50e3dfb9d52..76c51da5b66f3 100644
--- a/drivers/net/ethernet/netronome/nfp/crypto/tls.c
+++ b/drivers/net/ethernet/netronome/nfp/crypto/tls.c
@@ -296,7 +296,7 @@ nfp_net_tls_add(struct net_device *netdev, struct sock *sk,
 			break;
 		}
 #endif
-		/* fall through */
+		fallthrough;
 	case AF_INET:
 		req_sz = sizeof(struct nfp_crypto_req_add_v4);
 		ipv6 = false;
diff --git a/drivers/net/ethernet/netronome/nfp/flower/action.c b/drivers/net/ethernet/netronome/nfp/flower/action.c
index ff844e5cc41fb..1cbe2c9f3959f 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/action.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/action.c
@@ -297,7 +297,7 @@ nfp_fl_get_tun_from_act(struct nfp_app *app,
 	case htons(GENEVE_UDP_PORT):
 		if (priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)
 			return NFP_FL_TUNNEL_GENEVE;
-		/* FALLTHROUGH */
+		fallthrough;
 	default:
 		return NFP_FL_TUNNEL_NONE;
 	}
diff --git a/drivers/net/ethernet/netronome/nfp/flower/cmsg.c b/drivers/net/ethernet/netronome/nfp/flower/cmsg.c
index a050cb8987828..f21cf1f40f987 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/cmsg.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/cmsg.c
@@ -289,7 +289,7 @@ nfp_flower_cmsg_process_one_rx(struct nfp_app *app, struct sk_buff *skb)
 			skb_stored = nfp_flower_lag_unprocessed_msg(app, skb);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 err_default:
 		nfp_flower_cmsg_warn(app, "Cannot handle invalid repr control type %u\n",
diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c
index 4651fe417b7f8..36356f96661d7 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -784,7 +784,7 @@ nfp_flower_copy_pre_actions(char *act_dst, char *act_src, int len,
 		case NFP_FL_ACTION_OPCODE_PRE_TUNNEL:
 			if (tunnel_act)
 				*tunnel_act = true;
-			/* fall through */
+			fallthrough;
 		case NFP_FL_ACTION_OPCODE_PRE_LAG:
 			memcpy(act_dst + act_off, act_src + act_off, act_len);
 			break;
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_asm.c b/drivers/net/ethernet/netronome/nfp/nfp_asm.c
index b04b83687fe21..2643ea5948f48 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_asm.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_asm.c
@@ -137,7 +137,7 @@ static u16 nfp_swreg_to_unreg(swreg reg, bool is_dst)
 				val;
 		case NN_LM_MOD_DEC:
 			lm_dec = true;
-			/* fall through */
+			fallthrough;
 		case NN_LM_MOD_INC:
 			if (val) {
 				pr_err("LM offset in inc/dev mode\n");
diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
index 39ee23e8c0bfd..21ea22694e479 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_common.c
@@ -1940,10 +1940,10 @@ static int nfp_net_rx(struct nfp_net_rx_ring *rx_ring, int budget)
 				continue;
 			default:
 				bpf_warn_invalid_xdp_action(act);
-				/* fall through */
+				fallthrough;
 			case XDP_ABORTED:
 				trace_xdp_exception(dp->netdev, xdp_prog, act);
-				/* fall through */
+				fallthrough;
 			case XDP_DROP:
 				nfp_net_rx_give_one(dp, rx_ring, rxbuf->frag,
 						    rxbuf->dma_addr);
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c
index a486008eb80a9..252fe06f58aac 100644
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp6000_pcie.c
@@ -340,12 +340,12 @@ static int matching_bar(struct nfp_bar *bar, u32 tgt, u32 act, u32 tok,
 	switch (maptype) {
 	case NFP_PCIE_BAR_PCIE2CPP_MapType_TARGET:
 		bartok = -1;
-		/* FALLTHROUGH */
+		fallthrough;
 	case NFP_PCIE_BAR_PCIE2CPP_MapType_BULK:
 		baract = NFP_CPP_ACTION_RW;
 		if (act == 0)
 			act = NFP_CPP_ACTION_RW;
-		/* FALLTHROUGH */
+		fallthrough;
 	case NFP_PCIE_BAR_PCIE2CPP_MapType_FIXED:
 		break;
 	default:
diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c
index 75f012444796d..2260c2403a83a 100644
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_rtsym.c
@@ -213,7 +213,7 @@ u64 nfp_rtsym_size(const struct nfp_rtsym *sym)
 		return 0;
 	default:
 		pr_warn("rtsym '%s': unknown type: %d\n", sym->name, sym->type);
-		/* fall through */
+		fallthrough;
 	case NFP_RTSYM_TYPE_OBJECT:
 	case NFP_RTSYM_TYPE_FUNCTION:
 		return sym->size;
diff --git a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_param.c b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_param.c
index a26966fa40b93..dceec80fd6422 100644
--- a/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_param.c
+++ b/drivers/net/ethernet/oki-semi/pch_gbe/pch_gbe_param.c
@@ -410,7 +410,7 @@ static void pch_gbe_check_copper_options(struct pch_gbe_adapter *adapter)
 	case SPEED_1000 + HALF_DUPLEX:
 		netdev_dbg(adapter->netdev,
 			   "Half Duplex is not supported at 1000 Mbps\n");
-		/* fall through */
+		fallthrough;
 	case SPEED_1000 + FULL_DUPLEX:
 full_duplex_only:
 		netdev_dbg(adapter->netdev,
diff --git a/drivers/net/ethernet/packetengines/yellowfin.c b/drivers/net/ethernet/packetengines/yellowfin.c
index 647a1431b3591..3da0753071788 100644
--- a/drivers/net/ethernet/packetengines/yellowfin.c
+++ b/drivers/net/ethernet/packetengines/yellowfin.c
@@ -1356,7 +1356,7 @@ static int netdev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 	switch(cmd) {
 	case SIOCGMIIPHY:		/* Get address of MII PHY in use. */
 		data->phy_id = np->phys[0] & 0x1f;
-		/* Fall Through */
+		fallthrough;
 
 	case SIOCGMIIREG:		/* Read MII PHY register. */
 		data->val_out = mdio_read(ioaddr, data->phy_id & 0x1f, data->reg_num & 0x1f);
diff --git a/drivers/net/ethernet/qlogic/netxen/netxen_nic_ethtool.c b/drivers/net/ethernet/qlogic/netxen/netxen_nic_ethtool.c
index 66f45fce90fa8..c3f50ddbe8241 100644
--- a/drivers/net/ethernet/qlogic/netxen/netxen_nic_ethtool.c
+++ b/drivers/net/ethernet/qlogic/netxen/netxen_nic_ethtool.c
@@ -153,7 +153,7 @@ netxen_nic_get_link_ksettings(struct net_device *dev,
 	case NETXEN_BRDTYPE_P3_4_GB_MM:
 		supported |= SUPPORTED_Autoneg;
 		advertising |= ADVERTISED_Autoneg;
-		/* fall through */
+		fallthrough;
 	case NETXEN_BRDTYPE_P2_SB31_10G_CX4:
 	case NETXEN_BRDTYPE_P3_10G_CX4:
 	case NETXEN_BRDTYPE_P3_10G_CX4_LP:
@@ -182,7 +182,7 @@ netxen_nic_get_link_ksettings(struct net_device *dev,
 		supported |= SUPPORTED_TP;
 		check_sfp_module = netif_running(dev) &&
 			adapter->has_link_events;
-		/* fall through */
+		fallthrough;
 	case NETXEN_BRDTYPE_P2_SB31_10G:
 	case NETXEN_BRDTYPE_P3_10G_XFP:
 		supported |= SUPPORTED_FIBRE;
diff --git a/drivers/net/ethernet/qlogic/qed/qed_cxt.c b/drivers/net/ethernet/qlogic/qed/qed_cxt.c
index 876743a79c1f5..0e4cd8890cffc 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_cxt.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_cxt.c
@@ -2046,7 +2046,7 @@ int qed_cxt_set_pf_params(struct qed_hwfn *p_hwfn, u32 rdma_tasks)
 					       rdma_tasks);
 		/* no need for break since RoCE coexist with Ethernet */
 	}
-	/* fall through */
+		fallthrough;
 	case QED_PCI_ETH:
 	{
 		struct qed_eth_pf_params *p_params =
diff --git a/drivers/net/ethernet/qlogic/qed/qed_dev.c b/drivers/net/ethernet/qlogic/qed/qed_dev.c
index b3c9ebaf22807..b8f076e4e6b87 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_dev.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_dev.c
@@ -3109,14 +3109,14 @@ int qed_hw_init(struct qed_dev *cdev, struct qed_hw_init_params *p_params)
 						p_hwfn->hw_info.hw_mode);
 			if (rc)
 				break;
-		/* Fall through */
+			fallthrough;
 		case FW_MSG_CODE_DRV_LOAD_PORT:
 			rc = qed_hw_init_port(p_hwfn, p_hwfn->p_main_ptt,
 					      p_hwfn->hw_info.hw_mode);
 			if (rc)
 				break;
 
-		/* Fall through */
+			fallthrough;
 		case FW_MSG_CODE_DRV_LOAD_FUNCTION:
 			rc = qed_hw_init_pf(p_hwfn, p_hwfn->p_main_ptt,
 					    p_params->p_tunn,
diff --git a/drivers/net/ethernet/qlogic/qed/qed_main.c b/drivers/net/ethernet/qlogic/qed/qed_main.c
index 2558cb680db31..f39f629242a11 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_main.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_main.c
@@ -761,7 +761,7 @@ static int qed_set_int_mode(struct qed_dev *cdev, bool force_mode)
 		kfree(int_params->msix_table);
 		if (force_mode)
 			goto out;
-		/* Fallthrough */
+		fallthrough;
 
 	case QED_INT_MODE_MSI:
 		if (cdev->num_hwfns == 1) {
@@ -775,7 +775,7 @@ static int qed_set_int_mode(struct qed_dev *cdev, bool force_mode)
 			if (force_mode)
 				goto out;
 		}
-		/* Fallthrough */
+		fallthrough;
 
 	case QED_INT_MODE_INTA:
 			int_params->out.int_mode = QED_INT_MODE_INTA;
diff --git a/drivers/net/ethernet/qlogic/qed/qed_mcp.c b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
index 5be08f83e0aa6..cd882c4533942 100644
--- a/drivers/net/ethernet/qlogic/qed/qed_mcp.c
+++ b/drivers/net/ethernet/qlogic/qed/qed_mcp.c
@@ -1085,7 +1085,7 @@ int qed_mcp_unload_req(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
 		DP_NOTICE(p_hwfn,
 			  "Unknown WoL configuration %02x\n",
 			  p_hwfn->cdev->wol_config);
-		/* Fallthrough */
+		fallthrough;
 	case QED_OV_WOL_DEFAULT:
 		wol_param = DRV_MB_PARAM_UNLOAD_WOL_MCP;
 	}
@@ -1365,7 +1365,7 @@ static void qed_mcp_handle_link_change(struct qed_hwfn *p_hwfn,
 		break;
 	case LINK_STATUS_SPEED_AND_DUPLEX_1000THD:
 		p_link->full_duplex = false;
-	/* Fall-through */
+		fallthrough;
 	case LINK_STATUS_SPEED_AND_DUPLEX_1000TFD:
 		p_link->speed = 1000;
 		break;
@@ -2451,7 +2451,7 @@ qed_mcp_get_shmem_proto(struct qed_hwfn *p_hwfn,
 		break;
 	case FUNC_MF_CFG_PROTOCOL_ROCE:
 		DP_NOTICE(p_hwfn, "RoCE personality is not a valid value!\n");
-	/* Fallthrough */
+		fallthrough;
 	default:
 		rc = -EINVAL;
 	}
@@ -3546,7 +3546,7 @@ qed_mcp_resc_allocation_msg(struct qed_hwfn *p_hwfn,
 	switch (p_in_params->cmd) {
 	case DRV_MSG_SET_RESOURCE_VALUE_MSG:
 		mfw_resc_info.size = p_in_params->resc_max_val;
-		/* Fallthrough */
+		fallthrough;
 	case DRV_MSG_GET_RESOURCE_ALLOC_MSG:
 		break;
 	default:
@@ -3823,7 +3823,7 @@ qed_mcp_resc_unlock(struct qed_hwfn *p_hwfn,
 		DP_INFO(p_hwfn,
 			"Resource unlock request for an already released resource [%d]\n",
 			p_params->resource);
-		/* Fallthrough */
+		fallthrough;
 	case RESOURCE_OPCODE_RELEASED:
 		p_params->b_released = true;
 		break;
diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c b/drivers/net/ethernet/qlogic/qla3xxx.c
index 0d0e38debbc26..569e2a7a64e54 100644
--- a/drivers/net/ethernet/qlogic/qla3xxx.c
+++ b/drivers/net/ethernet/qlogic/qla3xxx.c
@@ -1542,7 +1542,7 @@ static void ql_link_state_machine_work(struct work_struct *work)
 		if (test_bit(QL_LINK_MASTER, &qdev->flags))
 			ql_port_start(qdev);
 		qdev->port_link_state = LS_DOWN;
-		/* Fall Through */
+		fallthrough;
 
 	case LS_DOWN:
 		if (curr_link_state == LS_UP) {
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c
index 5c2a3acf1e89b..b9894d54469c4 100644
--- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c
+++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c
@@ -353,7 +353,7 @@ static int qlcnic_82xx_get_link_ksettings(struct qlcnic_adapter *adapter,
 	case QLCNIC_BRDTYPE_P3P_4_GB_MM:
 		supported |= SUPPORTED_Autoneg;
 		advertising |= ADVERTISED_Autoneg;
-		/* fall through */
+		fallthrough;
 	case QLCNIC_BRDTYPE_P3P_10G_CX4:
 	case QLCNIC_BRDTYPE_P3P_10G_CX4_LP:
 	case QLCNIC_BRDTYPE_P3P_10000_BASE_T:
@@ -377,7 +377,7 @@ static int qlcnic_82xx_get_link_ksettings(struct qlcnic_adapter *adapter,
 		supported |= SUPPORTED_TP;
 		check_sfp_module = netif_running(adapter->netdev) &&
 				   ahw->has_link_events;
-		/* fall through */
+		fallthrough;
 	case QLCNIC_BRDTYPE_P3P_10G_XFP:
 		supported |= SUPPORTED_FIBRE;
 		advertising |= ADVERTISED_FIBRE;
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index d1da92ac7fbec..fc9e6626db558 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -4994,7 +4994,7 @@ static int rtl_alloc_irq(struct rtl8169_private *tp)
 		rtl_unlock_config_regs(tp);
 		RTL_W8(tp, Config2, RTL_R8(tp, Config2) & ~MSIEnable);
 		rtl_lock_config_regs(tp);
-		/* fall through */
+		fallthrough;
 	case RTL_GIGA_MAC_VER_07 ... RTL_GIGA_MAC_VER_17:
 		flags = PCI_IRQ_LEGACY;
 		break;
@@ -5137,7 +5137,7 @@ static void rtl_hw_initialize(struct rtl8169_private *tp)
 	switch (tp->mac_version) {
 	case RTL_GIGA_MAC_VER_49 ... RTL_GIGA_MAC_VER_52:
 		rtl8168ep_stop_cmac(tp);
-		/* fall through */
+		fallthrough;
 	case RTL_GIGA_MAC_VER_40 ... RTL_GIGA_MAC_VER_48:
 		rtl_hw_init_8168g(tp);
 		break;
diff --git a/drivers/net/ethernet/rocker/rocker_main.c b/drivers/net/ethernet/rocker/rocker_main.c
index fc99e7118e494..42458a46ffaf6 100644
--- a/drivers/net/ethernet/rocker/rocker_main.c
+++ b/drivers/net/ethernet/rocker/rocker_main.c
@@ -2169,7 +2169,7 @@ static void rocker_router_fib_event_work(struct work_struct *work)
 		rocker_world_fib4_del(rocker, &fib_work->fen_info);
 		fib_info_put(fib_work->fen_info.fi);
 		break;
-	case FIB_EVENT_RULE_ADD: /* fall through */
+	case FIB_EVENT_RULE_ADD:
 	case FIB_EVENT_RULE_DEL:
 		rule = fib_work->fr_info.rule;
 		if (!fib4_rule_default(rule))
@@ -2201,7 +2201,7 @@ static int rocker_router_fib_event(struct notifier_block *nb,
 	fib_work->event = event;
 
 	switch (event) {
-	case FIB_EVENT_ENTRY_REPLACE: /* fall through */
+	case FIB_EVENT_ENTRY_REPLACE:
 	case FIB_EVENT_ENTRY_DEL:
 		if (info->family == AF_INET) {
 			struct fib_entry_notifier_info *fen_info = ptr;
@@ -2224,7 +2224,7 @@ static int rocker_router_fib_event(struct notifier_block *nb,
 		 */
 		fib_info_hold(fib_work->fen_info.fi);
 		break;
-	case FIB_EVENT_RULE_ADD: /* fall through */
+	case FIB_EVENT_RULE_ADD:
 	case FIB_EVENT_RULE_DEL:
 		memcpy(&fib_work->fr_info, ptr, sizeof(fib_work->fr_info));
 		fib_rule_get(fib_work->fr_info.rule);
@@ -2811,7 +2811,7 @@ static int rocker_switchdev_event(struct notifier_block *unused,
 	switchdev_work->event = event;
 
 	switch (event) {
-	case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
+	case SWITCHDEV_FDB_ADD_TO_DEVICE:
 	case SWITCHDEV_FDB_DEL_TO_DEVICE:
 		memcpy(&switchdev_work->fdb_info, ptr,
 		       sizeof(switchdev_work->fdb_info));
diff --git a/drivers/net/ethernet/samsung/sxgbe/sxgbe_ethtool.c b/drivers/net/ethernet/samsung/sxgbe/sxgbe_ethtool.c
index 21465cb3d60ab..7f8b10c496607 100644
--- a/drivers/net/ethernet/samsung/sxgbe/sxgbe_ethtool.c
+++ b/drivers/net/ethernet/samsung/sxgbe/sxgbe_ethtool.c
@@ -316,7 +316,7 @@ static int sxgbe_get_rss_hash_opts(struct sxgbe_priv_data *priv,
 	case TCP_V4_FLOW:
 	case UDP_V4_FLOW:
 		cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
-		/* Fall through */
+		fallthrough;
 	case SCTP_V4_FLOW:
 	case AH_ESP_V4_FLOW:
 	case AH_V4_FLOW:
@@ -327,7 +327,7 @@ static int sxgbe_get_rss_hash_opts(struct sxgbe_priv_data *priv,
 	case TCP_V6_FLOW:
 	case UDP_V6_FLOW:
 		cmd->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
-		/* Fall through */
+		fallthrough;
 	case SCTP_V6_FLOW:
 	case AH_ESP_V6_FLOW:
 	case AH_V6_FLOW:
diff --git a/drivers/net/ethernet/sfc/falcon/ethtool.c b/drivers/net/ethernet/sfc/falcon/ethtool.c
index db90d94e24c92..a6bae6a234bac 100644
--- a/drivers/net/ethernet/sfc/falcon/ethtool.c
+++ b/drivers/net/ethernet/sfc/falcon/ethtool.c
@@ -957,7 +957,7 @@ ef4_ethtool_get_rxnfc(struct net_device *net_dev,
 		switch (info->flow_type) {
 		case TCP_V4_FLOW:
 			info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
-			/* Fall through */
+			fallthrough;
 		case UDP_V4_FLOW:
 		case SCTP_V4_FLOW:
 		case AH_ESP_V4_FLOW:
diff --git a/drivers/net/ethernet/sfc/falcon/farch.c b/drivers/net/ethernet/sfc/falcon/farch.c
index 332183280a459..fa1ade856b104 100644
--- a/drivers/net/ethernet/sfc/falcon/farch.c
+++ b/drivers/net/ethernet/sfc/falcon/farch.c
@@ -1049,10 +1049,10 @@ ef4_farch_handle_rx_event(struct ef4_channel *channel, const ef4_qword_t *event)
 		switch (rx_ev_hdr_type) {
 		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_TCP:
 			flags |= EF4_RX_PKT_TCP;
-			/* fall through */
+			fallthrough;
 		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_UDP:
 			flags |= EF4_RX_PKT_CSUMMED;
-			/* fall through */
+			fallthrough;
 		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_OTHER:
 		case FSE_AZ_RX_EV_HDR_TYPE_OTHER:
 			break;
@@ -1310,7 +1310,7 @@ int ef4_farch_ev_process(struct ef4_channel *channel, int budget)
 			if (efx->type->handle_global_event &&
 			    efx->type->handle_global_event(channel, &event))
 				break;
-			/* else fall through */
+			fallthrough;
 		default:
 			netif_err(channel->efx, hw, channel->efx->net_dev,
 				  "channel %d unknown event type %d (data "
@@ -1983,7 +1983,7 @@ ef4_farch_filter_from_gen_spec(struct ef4_farch_filter_spec *spec,
 	      EF4_FILTER_MATCH_LOC_HOST | EF4_FILTER_MATCH_LOC_PORT |
 	      EF4_FILTER_MATCH_REM_HOST | EF4_FILTER_MATCH_REM_PORT):
 		is_full = true;
-		/* fall through */
+		fallthrough;
 	case (EF4_FILTER_MATCH_ETHER_TYPE | EF4_FILTER_MATCH_IP_PROTO |
 	      EF4_FILTER_MATCH_LOC_HOST | EF4_FILTER_MATCH_LOC_PORT): {
 		__be32 rhost, host1, host2;
@@ -2034,7 +2034,7 @@ ef4_farch_filter_from_gen_spec(struct ef4_farch_filter_spec *spec,
 
 	case EF4_FILTER_MATCH_LOC_MAC | EF4_FILTER_MATCH_OUTER_VID:
 		is_full = true;
-		/* fall through */
+		fallthrough;
 	case EF4_FILTER_MATCH_LOC_MAC:
 		spec->type = (is_full ? EF4_FARCH_FILTER_MAC_FULL :
 			      EF4_FARCH_FILTER_MAC_WILD);
@@ -2081,7 +2081,7 @@ ef4_farch_filter_to_gen_spec(struct ef4_filter_spec *gen_spec,
 	case EF4_FARCH_FILTER_TCP_FULL:
 	case EF4_FARCH_FILTER_UDP_FULL:
 		is_full = true;
-		/* fall through */
+		fallthrough;
 	case EF4_FARCH_FILTER_TCP_WILD:
 	case EF4_FARCH_FILTER_UDP_WILD: {
 		__be32 host1, host2;
@@ -2125,7 +2125,7 @@ ef4_farch_filter_to_gen_spec(struct ef4_filter_spec *gen_spec,
 
 	case EF4_FARCH_FILTER_MAC_FULL:
 		is_full = true;
-		/* fall through */
+		fallthrough;
 	case EF4_FARCH_FILTER_MAC_WILD:
 		gen_spec->match_flags = EF4_FILTER_MATCH_LOC_MAC;
 		if (is_full)
diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c
index d07eeaad9bdff..4002f9a3ae909 100644
--- a/drivers/net/ethernet/sfc/farch.c
+++ b/drivers/net/ethernet/sfc/farch.c
@@ -1038,10 +1038,10 @@ efx_farch_handle_rx_event(struct efx_channel *channel, const efx_qword_t *event)
 		switch (rx_ev_hdr_type) {
 		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_TCP:
 			flags |= EFX_RX_PKT_TCP;
-			/* fall through */
+			fallthrough;
 		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_UDP:
 			flags |= EFX_RX_PKT_CSUMMED;
-			/* fall through */
+			fallthrough;
 		case FSE_CZ_RX_EV_HDR_TYPE_IPV4V6_OTHER:
 		case FSE_AZ_RX_EV_HDR_TYPE_OTHER:
 			break;
@@ -1316,7 +1316,7 @@ int efx_farch_ev_process(struct efx_channel *channel, int budget)
 			if (efx->type->handle_global_event &&
 			    efx->type->handle_global_event(channel, &event))
 				break;
-			/* else fall through */
+			fallthrough;
 		default:
 			netif_err(channel->efx, hw, channel->efx->net_dev,
 				  "channel %d unknown event type %d (data "
@@ -2043,7 +2043,7 @@ efx_farch_filter_from_gen_spec(struct efx_farch_filter_spec *spec,
 	      EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT |
 	      EFX_FILTER_MATCH_REM_HOST | EFX_FILTER_MATCH_REM_PORT):
 		is_full = true;
-		/* fall through */
+		fallthrough;
 	case (EFX_FILTER_MATCH_ETHER_TYPE | EFX_FILTER_MATCH_IP_PROTO |
 	      EFX_FILTER_MATCH_LOC_HOST | EFX_FILTER_MATCH_LOC_PORT): {
 		__be32 rhost, host1, host2;
@@ -2094,7 +2094,7 @@ efx_farch_filter_from_gen_spec(struct efx_farch_filter_spec *spec,
 
 	case EFX_FILTER_MATCH_LOC_MAC | EFX_FILTER_MATCH_OUTER_VID:
 		is_full = true;
-		/* fall through */
+		fallthrough;
 	case EFX_FILTER_MATCH_LOC_MAC:
 		spec->type = (is_full ? EFX_FARCH_FILTER_MAC_FULL :
 			      EFX_FARCH_FILTER_MAC_WILD);
@@ -2141,7 +2141,7 @@ efx_farch_filter_to_gen_spec(struct efx_filter_spec *gen_spec,
 	case EFX_FARCH_FILTER_TCP_FULL:
 	case EFX_FARCH_FILTER_UDP_FULL:
 		is_full = true;
-		/* fall through */
+		fallthrough;
 	case EFX_FARCH_FILTER_TCP_WILD:
 	case EFX_FARCH_FILTER_UDP_WILD: {
 		__be32 host1, host2;
@@ -2185,7 +2185,7 @@ efx_farch_filter_to_gen_spec(struct efx_filter_spec *gen_spec,
 
 	case EFX_FARCH_FILTER_MAC_FULL:
 		is_full = true;
-		/* fall through */
+		fallthrough;
 	case EFX_FARCH_FILTER_MAC_WILD:
 		gen_spec->match_flags = EFX_FILTER_MATCH_LOC_MAC;
 		if (is_full)
diff --git a/drivers/net/ethernet/sfc/mcdi_filters.c b/drivers/net/ethernet/sfc/mcdi_filters.c
index 5a74d880b7338..1523be77b9db6 100644
--- a/drivers/net/ethernet/sfc/mcdi_filters.c
+++ b/drivers/net/ethernet/sfc/mcdi_filters.c
@@ -140,7 +140,7 @@ efx_mcdi_filter_push_prep_set_match_fields(struct efx_nic *efx,
 		switch (encap_type & EFX_ENCAP_TYPES_MASK) {
 		case EFX_ENCAP_TYPE_VXLAN:
 			vni_type = MC_CMD_FILTER_OP_EXT_IN_VNI_TYPE_VXLAN;
-			/* fallthrough */
+			fallthrough;
 		case EFX_ENCAP_TYPE_GENEVE:
 			COPY_VALUE(ether_type, ETHER_TYPE);
 			outer_ip_proto = IPPROTO_UDP;
diff --git a/drivers/net/ethernet/sfc/mcdi_port_common.c b/drivers/net/ethernet/sfc/mcdi_port_common.c
index 56af8b54a864f..714d7f9372122 100644
--- a/drivers/net/ethernet/sfc/mcdi_port_common.c
+++ b/drivers/net/ethernet/sfc/mcdi_port_common.c
@@ -282,7 +282,7 @@ void efx_mcdi_phy_decode_link(struct efx_nic *efx,
 		break;
 	default:
 		WARN_ON(1);
-		/* Fall through */
+		fallthrough;
 	case MC_CMD_FCNTL_OFF:
 		link_state->fc = 0;
 		break;
diff --git a/drivers/net/ethernet/sfc/rx.c b/drivers/net/ethernet/sfc/rx.c
index 59a43d586967f..aaa112877561f 100644
--- a/drivers/net/ethernet/sfc/rx.c
+++ b/drivers/net/ethernet/sfc/rx.c
@@ -358,7 +358,7 @@ static bool efx_do_xdp(struct efx_nic *efx, struct efx_channel *channel,
 
 	case XDP_ABORTED:
 		trace_xdp_exception(efx->net_dev, xdp_prog, xdp_act);
-		/* Fall through */
+		fallthrough;
 	case XDP_DROP:
 		efx_free_rx_buffers(rx_queue, rx_buf, 1);
 		channel->n_rx_xdp_drops++;
diff --git a/drivers/net/ethernet/sis/sis900.c b/drivers/net/ethernet/sis/sis900.c
index 336105f773131..cfa460c7db231 100644
--- a/drivers/net/ethernet/sis/sis900.c
+++ b/drivers/net/ethernet/sis/sis900.c
@@ -2228,7 +2228,7 @@ static int mii_ioctl(struct net_device *net_dev, struct ifreq *rq, int cmd)
 	switch(cmd) {
 	case SIOCGMIIPHY:		/* Get address of MII PHY in use. */
 		data->phy_id = sis_priv->mii->phy_addr;
-		/* Fall Through */
+		fallthrough;
 
 	case SIOCGMIIREG:		/* Read MII PHY register. */
 		data->val_out = mdio_read(net_dev, data->phy_id & 0x1f, data->reg_num & 0x1f);
diff --git a/drivers/net/ethernet/smsc/smc911x.c b/drivers/net/ethernet/smsc/smc911x.c
index 186c0bddbe5fe..01069dfaf75c9 100644
--- a/drivers/net/ethernet/smsc/smc911x.c
+++ b/drivers/net/ethernet/smsc/smc911x.c
@@ -712,7 +712,7 @@ static void smc911x_phy_detect(struct net_device *dev)
 					/* Found an external PHY */
 					break;
 			}
-			/* Else, fall through */
+			fallthrough;
 		default:
 			/* Internal media only */
 			SMC_GET_PHY_ID1(lp, 1, id1);
diff --git a/drivers/net/ethernet/socionext/netsec.c b/drivers/net/ethernet/socionext/netsec.c
index 25db667fa879c..806eb651cea30 100644
--- a/drivers/net/ethernet/socionext/netsec.c
+++ b/drivers/net/ethernet/socionext/netsec.c
@@ -919,10 +919,10 @@ static u32 netsec_run_xdp(struct netsec_priv *priv, struct bpf_prog *prog,
 		break;
 	default:
 		bpf_warn_invalid_xdp_action(act);
-		/* fall through */
+		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(priv->ndev, prog, act);
-		/* fall through -- handle aborts by dropping packet */
+		fallthrough;	/* handle aborts by dropping packet */
 	case XDP_DROP:
 		ret = NETSEC_XDP_CONSUMED;
 		page = virt_to_head_page(xdp->data);
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-anarion.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-anarion.c
index d0d2d0fc5f0a9..08c76636c1641 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-anarion.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-anarion.c
@@ -84,9 +84,10 @@ static struct anarion_gmac *anarion_config_dt(struct platform_device *pdev)
 		return ERR_PTR(err);
 
 	switch (phy_mode) {
-	case PHY_INTERFACE_MODE_RGMII:		/* Fall through */
-	case PHY_INTERFACE_MODE_RGMII_ID	/* Fall through */:
-	case PHY_INTERFACE_MODE_RGMII_RXID:	/* Fall through */
+	case PHY_INTERFACE_MODE_RGMII:
+		fallthrough;
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
 	case PHY_INTERFACE_MODE_RGMII_TXID:
 		gmac->phy_intf_sel = GMAC_CONFIG_INTF_RGMII;
 		break;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
index e113b1376fdda..bf195adee393f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
@@ -1985,7 +1985,7 @@ void stmmac_selftest_run(struct net_device *dev,
 				ret = phy_loopback(dev->phydev, true);
 			if (!ret)
 				break;
-			/* Fallthrough */
+			fallthrough;
 		case STMMAC_LOOPBACK_MAC:
 			ret = stmmac_set_mac_loopback(priv, priv->ioaddr, true);
 			break;
@@ -2018,7 +2018,7 @@ void stmmac_selftest_run(struct net_device *dev,
 				ret = phy_loopback(dev->phydev, false);
 			if (!ret)
 				break;
-			/* Fallthrough */
+			fallthrough;
 		case STMMAC_LOOPBACK_MAC:
 			stmmac_set_mac_loopback(priv, priv->ioaddr, false);
 			break;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
index 3d747846f4829..cc27d660a8185 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_tc.c
@@ -228,7 +228,7 @@ static int tc_setup_cls_u32(struct stmmac_priv *priv,
 	switch (cls->command) {
 	case TC_CLSU32_REPLACE_KNODE:
 		tc_unfill_entry(priv, cls);
-		/* Fall through */
+		fallthrough;
 	case TC_CLSU32_NEW_KNODE:
 		return tc_config_knode(priv, cls);
 	case TC_CLSU32_DELETE_KNODE:
diff --git a/drivers/net/ethernet/sun/cassini.c b/drivers/net/ethernet/sun/cassini.c
index e2bc7a25f6d1f..b624e177ec715 100644
--- a/drivers/net/ethernet/sun/cassini.c
+++ b/drivers/net/ethernet/sun/cassini.c
@@ -4759,7 +4759,7 @@ static int cas_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	switch (cmd) {
 	case SIOCGMIIPHY:		/* Get address of MII PHY in use. */
 		data->phy_id = cp->phy_addr;
-		/* Fallthrough... */
+		fallthrough;
 
 	case SIOCGMIIREG:		/* Read MII PHY register. */
 		spin_lock_irqsave(&cp->lock, flags);
diff --git a/drivers/net/ethernet/sun/niu.c b/drivers/net/ethernet/sun/niu.c
index 9b5effb726572..68695d4afacd5 100644
--- a/drivers/net/ethernet/sun/niu.c
+++ b/drivers/net/ethernet/sun/niu.c
@@ -8835,7 +8835,7 @@ static int walk_phys(struct niu *np, struct niu_parent *parent)
 			else
 				goto unknown_vg_1g_port;
 
-			/* fallthru */
+			fallthrough;
 		case 0x22:
 			val = (phy_encode(PORT_TYPE_10G, 0) |
 			       phy_encode(PORT_TYPE_10G, 1) |
@@ -8860,7 +8860,7 @@ static int walk_phys(struct niu *np, struct niu_parent *parent)
 			else
 				goto unknown_vg_1g_port;
 
-			/* fallthru */
+			fallthrough;
 		case 0x13:
 			if ((lowest_10g & 0x7) == 0)
 				val = (phy_encode(PORT_TYPE_10G, 0) |
diff --git a/drivers/net/ethernet/sun/sungem.c b/drivers/net/ethernet/sun/sungem.c
index eeb8518c8a84d..8deb943ca5de0 100644
--- a/drivers/net/ethernet/sun/sungem.c
+++ b/drivers/net/ethernet/sun/sungem.c
@@ -2712,7 +2712,7 @@ static int gem_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	switch (cmd) {
 	case SIOCGMIIPHY:		/* Get address of MII PHY in use. */
 		data->phy_id = gp->mii_phy_addr;
-		/* Fallthrough... */
+		fallthrough;
 
 	case SIOCGMIIREG:		/* Read MII PHY register. */
 		data->val_out = __sungem_phy_read(gp, data->phy_id & 0x1f,
diff --git a/drivers/net/ethernet/ti/cpsw-phy-sel.c b/drivers/net/ethernet/ti/cpsw-phy-sel.c
index 4e184eecc8e18..6e72ecbe5cf7e 100644
--- a/drivers/net/ethernet/ti/cpsw-phy-sel.c
+++ b/drivers/net/ethernet/ti/cpsw-phy-sel.c
@@ -67,7 +67,7 @@ static void cpsw_gmii_sel_am3352(struct cpsw_phy_sel_priv *priv,
 		dev_warn(priv->dev,
 			 "Unsupported PHY mode: \"%s\". Defaulting to MII.\n",
 			phy_modes(phy_mode));
-		/* fallthrough */
+		fallthrough;
 	case PHY_INTERFACE_MODE_MII:
 		mode = AM33XX_GMII_SEL_MODE_MII;
 		break;
@@ -122,7 +122,7 @@ static void cpsw_gmii_sel_dra7xx(struct cpsw_phy_sel_priv *priv,
 		dev_warn(priv->dev,
 			 "Unsupported PHY mode: \"%s\". Defaulting to MII.\n",
 			phy_modes(phy_mode));
-		/* fallthrough */
+		fallthrough;
 	case PHY_INTERFACE_MODE_MII:
 		mode = AM33XX_GMII_SEL_MODE_MII;
 		break;
diff --git a/drivers/net/ethernet/ti/cpsw_priv.c b/drivers/net/ethernet/ti/cpsw_priv.c
index d6d7a7d9c7ad0..482a1a451e437 100644
--- a/drivers/net/ethernet/ti/cpsw_priv.c
+++ b/drivers/net/ethernet/ti/cpsw_priv.c
@@ -1371,10 +1371,10 @@ int cpsw_run_xdp(struct cpsw_priv *priv, int ch, struct xdp_buff *xdp,
 		break;
 	default:
 		bpf_warn_invalid_xdp_action(act);
-		/* fall through */
+		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(ndev, prog, act);
-		/* fall through -- handle aborts by dropping packet */
+		fallthrough;	/* handle aborts by dropping packet */
 	case XDP_DROP:
 		goto drop;
 	}
diff --git a/drivers/net/ethernet/ti/tlan.c b/drivers/net/ethernet/ti/tlan.c
index 58623e974a0c0..76a342ea37972 100644
--- a/drivers/net/ethernet/ti/tlan.c
+++ b/drivers/net/ethernet/ti/tlan.c
@@ -948,7 +948,7 @@ static int tlan_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
 	switch (cmd) {
 	case SIOCGMIIPHY:		/* get address of MII PHY in use. */
 		data->phy_id = phy;
-		/* fall through */
+		fallthrough;
 
 
 	case SIOCGMIIREG:		/* read MII PHY register. */
diff --git a/drivers/net/ethernet/toshiba/ps3_gelic_wireless.c b/drivers/net/ethernet/toshiba/ps3_gelic_wireless.c
index 2db546b27ee00..dc14a66583ff3 100644
--- a/drivers/net/ethernet/toshiba/ps3_gelic_wireless.c
+++ b/drivers/net/ethernet/toshiba/ps3_gelic_wireless.c
@@ -877,7 +877,7 @@ static int gelic_wl_set_auth(struct net_device *netdev,
 	case IW_AUTH_KEY_MGMT:
 		if (param->value & IW_AUTH_KEY_MGMT_PSK)
 			break;
-		/* intentionally fall through */
+		fallthrough;
 	default:
 		ret = -EOPNOTSUPP;
 		break;
diff --git a/drivers/net/ethernet/toshiba/spider_net.c b/drivers/net/ethernet/toshiba/spider_net.c
index 07389702a5400..5f5b33e6653b2 100644
--- a/drivers/net/ethernet/toshiba/spider_net.c
+++ b/drivers/net/ethernet/toshiba/spider_net.c
@@ -786,7 +786,7 @@ spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
 			/* fallthrough, if we release the descriptors
 			 * brutally (then we don't care about
 			 * SPIDER_NET_DESCR_CARDOWNED) */
-			/* Fall through */
+			fallthrough;
 
 		case SPIDER_NET_DESCR_RESPONSE_ERROR:
 		case SPIDER_NET_DESCR_PROTECTION_ERROR:
@@ -1397,9 +1397,9 @@ spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg,
 		show_error = 0;
 		break;
 
-	case SPIDER_NET_GDDDEN0INT: /* fallthrough */
-	case SPIDER_NET_GDCDEN0INT: /* fallthrough */
-	case SPIDER_NET_GDBDEN0INT: /* fallthrough */
+	case SPIDER_NET_GDDDEN0INT:
+	case SPIDER_NET_GDCDEN0INT:
+	case SPIDER_NET_GDBDEN0INT:
 	case SPIDER_NET_GDADEN0INT:
 		/* someone has set RX_DMA_EN to 0 */
 		show_error = 0;
@@ -1449,10 +1449,10 @@ spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg,
 		 * Logging is not needed. */
 		show_error = 0;
 		break;
-	case SPIDER_NET_GRFDFLLINT: /* fallthrough */
-	case SPIDER_NET_GRFCFLLINT: /* fallthrough */
-	case SPIDER_NET_GRFBFLLINT: /* fallthrough */
-	case SPIDER_NET_GRFAFLLINT: /* fallthrough */
+	case SPIDER_NET_GRFDFLLINT:
+	case SPIDER_NET_GRFCFLLINT:
+	case SPIDER_NET_GRFBFLLINT:
+	case SPIDER_NET_GRFAFLLINT:
 	case SPIDER_NET_GRMFLLINT:
 		/* Could happen when rx chain is full */
 		if (card->ignore_rx_ramfull == 0) {
@@ -1473,9 +1473,9 @@ spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg,
 		break;
 
 	/* chain end */
-	case SPIDER_NET_GDDDCEINT: /* fallthrough */
-	case SPIDER_NET_GDCDCEINT: /* fallthrough */
-	case SPIDER_NET_GDBDCEINT: /* fallthrough */
+	case SPIDER_NET_GDDDCEINT:
+	case SPIDER_NET_GDCDCEINT:
+	case SPIDER_NET_GDBDCEINT:
 	case SPIDER_NET_GDADCEINT:
 		spider_net_resync_head_ptr(card);
 		spider_net_refill_rx_chain(card);
@@ -1486,9 +1486,9 @@ spider_net_handle_error_irq(struct spider_net_card *card, u32 status_reg,
 		break;
 
 	/* invalid descriptor */
-	case SPIDER_NET_GDDINVDINT: /* fallthrough */
-	case SPIDER_NET_GDCINVDINT: /* fallthrough */
-	case SPIDER_NET_GDBINVDINT: /* fallthrough */
+	case SPIDER_NET_GDDINVDINT:
+	case SPIDER_NET_GDCINVDINT:
+	case SPIDER_NET_GDBINVDINT:
 	case SPIDER_NET_GDAINVDINT:
 		/* Could happen when rx chain is full */
 		spider_net_resync_head_ptr(card);
diff --git a/drivers/net/ethernet/xircom/xirc2ps_cs.c b/drivers/net/ethernet/xircom/xirc2ps_cs.c
index 3e3883ad88b08..3e337142b5161 100644
--- a/drivers/net/ethernet/xircom/xirc2ps_cs.c
+++ b/drivers/net/ethernet/xircom/xirc2ps_cs.c
@@ -1434,7 +1434,7 @@ do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
     switch(cmd) {
       case SIOCGMIIPHY:		/* Get the address of the PHY in use. */
 	data->phy_id = 0;	/* we have only this address */
-	/* fall through */
+	fallthrough;
       case SIOCGMIIREG:		/* Read the specified MII register. */
 	data->val_out = mii_rd(ioaddr, data->phy_id & 0x1f,
 			       data->reg_num & 0x1f);
diff --git a/drivers/net/fddi/skfp/pcmplc.c b/drivers/net/fddi/skfp/pcmplc.c
index 1be039579d709..554cde8d6073e 100644
--- a/drivers/net/fddi/skfp/pcmplc.c
+++ b/drivers/net/fddi/skfp/pcmplc.c
@@ -847,7 +847,7 @@ static void pcm_fsm(struct s_smc *smc, struct s_phy *phy, int cmd)
 
 	case ACTIONS(PC5_SIGNAL) :
 		ACTIONS_DONE() ;
-		/* fall through */
+		fallthrough;
 	case PC5_SIGNAL :
 		if ((cmd != PC_SIGNAL) && (cmd != PC_TIMEOUT_LCT))
 			break ;
@@ -946,7 +946,7 @@ static void pcm_fsm(struct s_smc *smc, struct s_phy *phy, int cmd)
 		SETMASK(PLC(np,PL_CNTRL_B),PL_PC_JOIN,PL_PC_JOIN) ;
 		ACTIONS_DONE() ;
 		cmd = 0 ;
-		/* fall thru */
+		fallthrough;
 	case PC6_JOIN :
 		switch (plc->p_state) {
 		case PS_ACTIVE:
diff --git a/drivers/net/fjes/fjes_main.c b/drivers/net/fjes/fjes_main.c
index 8c810edece866..466622664424d 100644
--- a/drivers/net/fjes/fjes_main.c
+++ b/drivers/net/fjes/fjes_main.c
@@ -974,7 +974,7 @@ static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
 				FJES_RX_STOP_REQ_DONE;
 		spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 		clear_bit(src_epid, &hw->txrx_stop_req_bit);
-		/* fall through */
+		fallthrough;
 	case EP_PARTNER_UNSHARE:
 	case EP_PARTNER_COMPLETE:
 	default:
diff --git a/drivers/net/hamradio/baycom_epp.c b/drivers/net/hamradio/baycom_epp.c
index 4476491b58f9d..e4e4981ac1d29 100644
--- a/drivers/net/hamradio/baycom_epp.c
+++ b/drivers/net/hamradio/baycom_epp.c
@@ -500,7 +500,7 @@ static int transmit(struct baycom_state *bc, int cnt, unsigned char stat)
 				}
 				break;
 			}
-			/* fall through */
+			fallthrough;
 
 		default:
 			if (bc->hdlctx.calibrate <= 0)
diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index deef142151104..17be2bb2985cd 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -482,7 +482,7 @@ static void ax_encaps(struct net_device *dev, unsigned char *icp, int len)
 		case CRC_MODE_SMACK_TEST:
 			ax->crcmode  = CRC_MODE_FLEX_TEST;
 			printk(KERN_INFO "mkiss: %s: Trying crc-smack\n", ax->dev->name);
-			// fall through
+			fallthrough;
 		case CRC_MODE_SMACK:
 			*p |= 0x80;
 			crc = swab16(crc16(0, p, len));
@@ -491,7 +491,7 @@ static void ax_encaps(struct net_device *dev, unsigned char *icp, int len)
 		case CRC_MODE_FLEX_TEST:
 			ax->crcmode = CRC_MODE_NONE;
 			printk(KERN_INFO "mkiss: %s: Trying crc-flexnet\n", ax->dev->name);
-			// fall through
+			fallthrough;
 		case CRC_MODE_FLEX:
 			*p |= 0x20;
 			crc = calc_crc_flex(p, len);
@@ -744,7 +744,6 @@ static int mkiss_open(struct tty_struct *tty)
 		       ax->dev->name);
 		break;
 	case 0:
-		/* fall through */
 	default:
 		crc_force = 0;
 		printk(KERN_INFO "mkiss: %s: crc mode is auto.\n",
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 5da04e9979894..c8d803d3616c9 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -842,7 +842,7 @@ static int macvlan_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	case SIOCSHWTSTAMP:
 		if (!net_eq(dev_net(dev), &init_net))
 			break;
-		/* fall through */
+		fallthrough;
 	case SIOCGHWTSTAMP:
 		if (netif_device_present(real_dev) && ops->ndo_do_ioctl)
 			err = ops->ndo_do_ioctl(real_dev, &ifrr, cmd);
diff --git a/drivers/net/mii.c b/drivers/net/mii.c
index 44612122338bb..f6a97c859f3a4 100644
--- a/drivers/net/mii.c
+++ b/drivers/net/mii.c
@@ -597,7 +597,7 @@ int generic_mii_ioctl(struct mii_if_info *mii_if,
 	switch(cmd) {
 	case SIOCGMIIPHY:
 		mii_data->phy_id = mii_if->phy_id;
-		/* fall through */
+		fallthrough;
 
 	case SIOCGMIIREG:
 		mii_data->val_out =
diff --git a/drivers/net/netdevsim/bus.c b/drivers/net/netdevsim/bus.c
index 7971dc4f54f15..0e9511661601a 100644
--- a/drivers/net/netdevsim/bus.c
+++ b/drivers/net/netdevsim/bus.c
@@ -193,7 +193,7 @@ new_device_store(struct bus_type *bus, const char *buf, size_t count)
 	switch (err) {
 	case 1:
 		port_count = 1;
-		/* fall through */
+		fallthrough;
 	case 2:
 		if (id > INT_MAX) {
 			pr_err("Value of \"id\" is too big.\n");
diff --git a/drivers/net/netdevsim/fib.c b/drivers/net/netdevsim/fib.c
index f32d56ac3e80f..deea17a0e79c9 100644
--- a/drivers/net/netdevsim/fib.c
+++ b/drivers/net/netdevsim/fib.c
@@ -760,14 +760,14 @@ static int nsim_fib_event_nb(struct notifier_block *nb, unsigned long event,
 	spin_lock_bh(&data->fib_lock);
 
 	switch (event) {
-	case FIB_EVENT_RULE_ADD: /* fall through */
+	case FIB_EVENT_RULE_ADD:
 	case FIB_EVENT_RULE_DEL:
 		err = nsim_fib_rule_event(data, info,
 					  event == FIB_EVENT_RULE_ADD);
 		break;
 
-	case FIB_EVENT_ENTRY_REPLACE:  /* fall through */
-	case FIB_EVENT_ENTRY_APPEND:  /* fall through */
+	case FIB_EVENT_ENTRY_REPLACE:
+	case FIB_EVENT_ENTRY_APPEND:
 	case FIB_EVENT_ENTRY_DEL:
 		err = nsim_fib_event(data, info, event);
 		break;
diff --git a/drivers/net/phy/adin.c b/drivers/net/phy/adin.c
index 7471a8b908735..307f0ac1287be 100644
--- a/drivers/net/phy/adin.c
+++ b/drivers/net/phy/adin.c
@@ -366,10 +366,10 @@ static int adin_set_edpd(struct phy_device *phydev, u16 tx_interval)
 
 	switch (tx_interval) {
 	case 1000: /* 1 second */
-		/* fallthrough */
+		fallthrough;
 	case ETHTOOL_PHY_EDPD_DFLT_TX_MSECS:
 		val |= ADIN1300_NRG_PD_TX_EN;
-		/* fallthrough */
+		fallthrough;
 	case ETHTOOL_PHY_EDPD_NO_TX:
 		break;
 	default:
diff --git a/drivers/net/phy/dp83640.c b/drivers/net/phy/dp83640.c
index 50fb7d16b75ac..79e67f2fe00ae 100644
--- a/drivers/net/phy/dp83640.c
+++ b/drivers/net/phy/dp83640.c
@@ -766,13 +766,13 @@ static int decode_evnt(struct dp83640_private *dp83640,
 	switch (words) {
 	case 3:
 		dp83640->edata.sec_hi = phy_txts->sec_hi;
-		/* fall through */
+		fallthrough;
 	case 2:
 		dp83640->edata.sec_lo = phy_txts->sec_lo;
-		/* fall through */
+		fallthrough;
 	case 1:
 		dp83640->edata.ns_hi = phy_txts->ns_hi;
-		/* fall through */
+		fallthrough;
 	case 0:
 		dp83640->edata.ns_lo = phy_txts->ns_lo;
 	}
@@ -1409,7 +1409,7 @@ static void dp83640_txtstamp(struct mii_timestamper *mii_ts,
 			kfree_skb(skb);
 			return;
 		}
-		/* fall through */
+		fallthrough;
 	case HWTSTAMP_TX_ON:
 		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
 		skb_info->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT;
diff --git a/drivers/net/phy/fixed_phy.c b/drivers/net/phy/fixed_phy.c
index c4641b1704d61..18d81f43f2a88 100644
--- a/drivers/net/phy/fixed_phy.c
+++ b/drivers/net/phy/fixed_phy.c
@@ -279,13 +279,13 @@ static struct phy_device *__fixed_phy_register(unsigned int irq,
 				 phy->supported);
 		linkmode_set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
 				 phy->supported);
-		/* fall through */
+		fallthrough;
 	case SPEED_100:
 		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Half_BIT,
 				 phy->supported);
 		linkmode_set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
 				 phy->supported);
-		/* fall through */
+		fallthrough;
 	case SPEED_10:
 	default:
 		linkmode_set_bit(ETHTOOL_LINK_MODE_10baseT_Half_BIT,
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index 79b4f35d151ec..735a806045ac3 100644
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -355,7 +355,7 @@ int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 	switch (cmd) {
 	case SIOCGMIIPHY:
 		mii_data->phy_id = phydev->mdio.addr;
-		/* fall through */
+		fallthrough;
 
 	case SIOCGMIIREG:
 		if (mdio_phy_id_is_c45(mii_data->phy_id)) {
@@ -433,7 +433,7 @@ int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd)
 	case SIOCSHWTSTAMP:
 		if (phydev->mii_ts && phydev->mii_ts->hwtstamp)
 			return phydev->mii_ts->hwtstamp(phydev->mii_ts, ifr);
-		/* fall through */
+		fallthrough;
 
 	default:
 		return -EOPNOTSUPP;
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 57d44648c8dd1..8adfbad0a1e8f 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -1979,7 +1979,7 @@ static int genphy_setup_master_slave(struct phy_device *phydev)
 		break;
 	case MASTER_SLAVE_CFG_MASTER_FORCE:
 		ctl |= CTL1000_AS_MASTER;
-		/* fallthrough */
+		fallthrough;
 	case MASTER_SLAVE_CFG_SLAVE_FORCE:
 		ctl |= CTL1000_ENABLE_MASTER;
 		break;
diff --git a/drivers/net/phy/phylink.c b/drivers/net/phy/phylink.c
index 32b4bd6a5b559..32f4e8ec96cff 100644
--- a/drivers/net/phy/phylink.c
+++ b/drivers/net/phy/phylink.c
@@ -1905,7 +1905,7 @@ int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
 		switch (cmd) {
 		case SIOCGMIIPHY:
 			mii->phy_id = pl->phydev->mdio.addr;
-			/* fall through */
+			fallthrough;
 
 		case SIOCGMIIREG:
 			ret = phylink_phy_read(pl, mii->phy_id, mii->reg_num);
@@ -1928,7 +1928,7 @@ int phylink_mii_ioctl(struct phylink *pl, struct ifreq *ifr, int cmd)
 		switch (cmd) {
 		case SIOCGMIIPHY:
 			mii->phy_id = 0;
-			/* fall through */
+			fallthrough;
 
 		case SIOCGMIIREG:
 			ret = phylink_mii_read(pl, mii->phy_id, mii->reg_num);
diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c
index 6900c68260e0d..58014feedf6c8 100644
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -149,7 +149,7 @@ int sfp_parse_port(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
 			port = PORT_TP;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case SFF8024_CONNECTOR_SG: /* guess */
 	case SFF8024_CONNECTOR_HSSDC_II:
 	case SFF8024_CONNECTOR_NOSEPARATE:
@@ -301,7 +301,7 @@ void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
 		break;
 	case SFF8024_ECC_100GBASE_CR4:
 		phylink_set(modes, 100000baseCR4_Full);
-		/* fallthrough */
+		fallthrough;
 	case SFF8024_ECC_25GBASE_CR_S:
 	case SFF8024_ECC_25GBASE_CR_N:
 		phylink_set(modes, 25000baseCR_Full);
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index c24b0e83dd329..cf83314c8591e 100644
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -552,7 +552,7 @@ static umode_t sfp_hwmon_is_visible(const void *data,
 		case hwmon_temp_crit:
 			if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN))
 				return 0;
-			/* fall through */
+			fallthrough;
 		case hwmon_temp_input:
 		case hwmon_temp_label:
 			return 0444;
@@ -571,7 +571,7 @@ static umode_t sfp_hwmon_is_visible(const void *data,
 		case hwmon_in_crit:
 			if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN))
 				return 0;
-			/* fall through */
+			fallthrough;
 		case hwmon_in_input:
 		case hwmon_in_label:
 			return 0444;
@@ -590,7 +590,7 @@ static umode_t sfp_hwmon_is_visible(const void *data,
 		case hwmon_curr_crit:
 			if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN))
 				return 0;
-			/* fall through */
+			fallthrough;
 		case hwmon_curr_input:
 		case hwmon_curr_label:
 			return 0444;
@@ -618,7 +618,7 @@ static umode_t sfp_hwmon_is_visible(const void *data,
 		case hwmon_power_crit:
 			if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN))
 				return 0;
-			/* fall through */
+			fallthrough;
 		case hwmon_power_input:
 		case hwmon_power_label:
 			return 0444;
@@ -1872,7 +1872,7 @@ static void sfp_sm_module(struct sfp *sfp, unsigned int event)
 			dev_warn(sfp->dev, "hwmon probe failed: %d\n", err);
 
 		sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0);
-		/* fall through */
+		fallthrough;
 	case SFP_MOD_WAITDEV:
 		/* Ensure that the device is attached before proceeding */
 		if (sfp->sm_dev_state < SFP_DEV_DOWN)
@@ -1890,7 +1890,7 @@ static void sfp_sm_module(struct sfp *sfp, unsigned int event)
 			goto insert;
 
 		sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0);
-		/* fall through */
+		fallthrough;
 	case SFP_MOD_HPOWER:
 		/* Enable high power mode */
 		err = sfp_sm_mod_hpower(sfp, true);
diff --git a/drivers/net/plip/plip.c b/drivers/net/plip/plip.c
index d82016dcde3b9..4406b353123ed 100644
--- a/drivers/net/plip/plip.c
+++ b/drivers/net/plip/plip.c
@@ -498,7 +498,7 @@ plip_receive(unsigned short nibble_timeout, struct net_device *dev,
 		*data_p = (c0 >> 3) & 0x0f;
 		write_data (dev, 0x10); /* send ACK */
 		*ns_p = PLIP_NB_1;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_NB_1:
 		cx = nibble_timeout;
@@ -594,7 +594,7 @@ plip_receive_packet(struct net_device *dev, struct net_local *nl,
 			printk(KERN_DEBUG "%s: receive start\n", dev->name);
 		rcv->state = PLIP_PK_LENGTH_LSB;
 		rcv->nibble = PLIP_NB_BEGIN;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_PK_LENGTH_LSB:
 		if (snd->state != PLIP_PK_DONE) {
@@ -615,7 +615,7 @@ plip_receive_packet(struct net_device *dev, struct net_local *nl,
 				return TIMEOUT;
 		}
 		rcv->state = PLIP_PK_LENGTH_MSB;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_PK_LENGTH_MSB:
 		if (plip_receive(nibble_timeout, dev,
@@ -638,7 +638,7 @@ plip_receive_packet(struct net_device *dev, struct net_local *nl,
 		rcv->state = PLIP_PK_DATA;
 		rcv->byte = 0;
 		rcv->checksum = 0;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_PK_DATA:
 		lbuf = rcv->skb->data;
@@ -651,7 +651,7 @@ plip_receive_packet(struct net_device *dev, struct net_local *nl,
 			rcv->checksum += lbuf[--rcv->byte];
 		} while (rcv->byte);
 		rcv->state = PLIP_PK_CHECKSUM;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_PK_CHECKSUM:
 		if (plip_receive(nibble_timeout, dev,
@@ -664,7 +664,7 @@ plip_receive_packet(struct net_device *dev, struct net_local *nl,
 			return ERROR;
 		}
 		rcv->state = PLIP_PK_DONE;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_PK_DONE:
 		/* Inform the upper layer for the arrival of a packet. */
@@ -710,7 +710,7 @@ plip_send(unsigned short nibble_timeout, struct net_device *dev,
 	case PLIP_NB_BEGIN:
 		write_data (dev, data & 0x0f);
 		*ns_p = PLIP_NB_1;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_NB_1:
 		write_data (dev, 0x10 | (data & 0x0f));
@@ -725,7 +725,7 @@ plip_send(unsigned short nibble_timeout, struct net_device *dev,
 		}
 		write_data (dev, 0x10 | (data >> 4));
 		*ns_p = PLIP_NB_2;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_NB_2:
 		write_data (dev, (data >> 4));
@@ -814,7 +814,7 @@ plip_send_packet(struct net_device *dev, struct net_local *nl,
 			      &snd->nibble, snd->length.b.lsb))
 			return TIMEOUT;
 		snd->state = PLIP_PK_LENGTH_MSB;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_PK_LENGTH_MSB:
 		if (plip_send(nibble_timeout, dev,
@@ -823,7 +823,7 @@ plip_send_packet(struct net_device *dev, struct net_local *nl,
 		snd->state = PLIP_PK_DATA;
 		snd->byte = 0;
 		snd->checksum = 0;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_PK_DATA:
 		do {
@@ -835,7 +835,7 @@ plip_send_packet(struct net_device *dev, struct net_local *nl,
 			snd->checksum += lbuf[--snd->byte];
 		} while (snd->byte);
 		snd->state = PLIP_PK_CHECKSUM;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_PK_CHECKSUM:
 		if (plip_send(nibble_timeout, dev,
@@ -846,7 +846,7 @@ plip_send_packet(struct net_device *dev, struct net_local *nl,
 		dev_kfree_skb(snd->skb);
 		dev->stats.tx_packets++;
 		snd->state = PLIP_PK_DONE;
-		/* fall through */
+		fallthrough;
 
 	case PLIP_PK_DONE:
 		/* Close the connection */
@@ -935,7 +935,7 @@ plip_interrupt(void *dev_id)
 	switch (nl->connection) {
 	case PLIP_CN_CLOSING:
 		netif_wake_queue (dev);
-		/* fall through */
+		fallthrough;
 	case PLIP_CN_NONE:
 	case PLIP_CN_SEND:
 		rcv->state = PLIP_PK_TRIGGER;
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 3c11a77f5709f..7959b5c2d11f1 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1590,10 +1590,10 @@ static int tun_xdp_act(struct tun_struct *tun, struct bpf_prog *xdp_prog,
 		break;
 	default:
 		bpf_warn_invalid_xdp_action(act);
-		/* fall through */
+		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(tun->dev, xdp_prog, act);
-		/* fall through */
+		fallthrough;
 	case XDP_DROP:
 		this_cpu_inc(tun->pcpu_stats->rx_dropped);
 		break;
@@ -2417,7 +2417,7 @@ static int tun_xdp_one(struct tun_struct *tun,
 		switch (err) {
 		case XDP_REDIRECT:
 			*flush = true;
-			/* fall through */
+			fallthrough;
 		case XDP_TX:
 			return 0;
 		case XDP_PASS:
diff --git a/drivers/net/usb/aqc111.c b/drivers/net/usb/aqc111.c
index 7e44110746dd0..0717c18015c9c 100644
--- a/drivers/net/usb/aqc111.c
+++ b/drivers/net/usb/aqc111.c
@@ -333,13 +333,13 @@ static void aqc111_set_phy_speed(struct usbnet *dev, u8 autoneg, u16 speed)
 		switch (speed) {
 		case SPEED_5000:
 			aqc111_data->phy_cfg |= AQ_ADV_5G;
-			/* fall-through */
+			fallthrough;
 		case SPEED_2500:
 			aqc111_data->phy_cfg |= AQ_ADV_2G5;
-			/* fall-through */
+			fallthrough;
 		case SPEED_1000:
 			aqc111_data->phy_cfg |= AQ_ADV_1G;
-			/* fall-through */
+			fallthrough;
 		case SPEED_100:
 			aqc111_data->phy_cfg |= AQ_ADV_100M;
 			/* fall-through */
diff --git a/drivers/net/usb/catc.c b/drivers/net/usb/catc.c
index d387bc7ac1b60..97ba67042d126 100644
--- a/drivers/net/usb/catc.c
+++ b/drivers/net/usb/catc.c
@@ -858,7 +858,7 @@ static int catc_probe(struct usb_interface *intf, const struct usb_device_id *id
 		default:
 			dev_warn(&intf->dev,
 				 "Couldn't detect memory size, assuming 32k\n");
-			/* fall through */
+			fallthrough;
 		case 0x87654321:
 			catc_set_reg(catc, TxBufCount, 4);
 			catc_set_reg(catc, RxBufCount, 16);
diff --git a/drivers/net/usb/cdc-phonet.c b/drivers/net/usb/cdc-phonet.c
index 9bdbd7b472a0a..dba847f280962 100644
--- a/drivers/net/usb/cdc-phonet.c
+++ b/drivers/net/usb/cdc-phonet.c
@@ -97,7 +97,7 @@ static void tx_complete(struct urb *req)
 	case -ECONNRESET:
 	case -ESHUTDOWN:
 		dev->stats.tx_aborted_errors++;
-		/* fall through */
+		fallthrough;
 	default:
 		dev->stats.tx_errors++;
 		dev_dbg(&dev->dev, "TX error (%d)\n", status);
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 442507f25aadb..65b315bc60abd 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -3192,7 +3192,7 @@ static void rx_complete(struct urb *urb)
 	case -EPIPE:
 		dev->net->stats.rx_errors++;
 		lan78xx_defer_kevent(dev, EVENT_RX_HALT);
-		/* FALLTHROUGH */
+		fallthrough;
 	case -ECONNRESET:				/* async unlink */
 	case -ESHUTDOWN:				/* hardware gone */
 		netif_dbg(dev, ifdown, dev->net,
@@ -3213,7 +3213,7 @@ static void rx_complete(struct urb *urb)
 	/* data overrun ... flush fifo? */
 	case -EOVERFLOW:
 		dev->net->stats.rx_over_errors++;
-		/* FALLTHROUGH */
+		fallthrough;
 
 	default:
 		state = rx_cleanup;
diff --git a/drivers/net/usb/pegasus.c b/drivers/net/usb/pegasus.c
index 0ef7e1f443e33..e92cb51a2c770 100644
--- a/drivers/net/usb/pegasus.c
+++ b/drivers/net/usb/pegasus.c
@@ -629,7 +629,7 @@ static void write_bulk_callback(struct urb *urb)
 		return;
 	default:
 		netif_info(pegasus, tx_err, net, "TX status %d\n", status);
-		/* FALL THROUGH */
+		fallthrough;
 	case 0:
 		break;
 	}
@@ -1009,7 +1009,7 @@ static int pegasus_ioctl(struct net_device *net, struct ifreq *rq, int cmd)
 	switch (cmd) {
 	case SIOCDEVPRIVATE:
 		data[0] = pegasus->phy;
-		/* fall through */
+		fallthrough;
 	case SIOCDEVPRIVATE + 1:
 		read_mii_word(pegasus, data[0], data[1] & 0x1f, &data[3]);
 		res = 0;
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 2b02fefd094d5..b1770489aca51 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1682,7 +1682,7 @@ static void intr_callback(struct urb *urb)
 	case -ECONNRESET:	/* unlink */
 	case -ESHUTDOWN:
 		netif_device_detach(tp->netdev);
-		/* fall through */
+		fallthrough;
 	case -ENOENT:
 	case -EPROTO:
 		netif_info(tp, intr, tp->netdev,
@@ -3251,7 +3251,7 @@ static void r8153b_ups_en(struct r8152 *tp, bool enable)
 			r8152_mdio_write(tp, MII_BMCR, data);
 
 			data = r8153_phy_status(tp, PHY_STAT_LAN_ON);
-			/* fall through */
+			fallthrough;
 
 		default:
 			if (data != PHY_STAT_LAN_ON)
@@ -4849,7 +4849,7 @@ static int rtl8152_set_speed(struct r8152 *tp, u8 autoneg, u32 speed, u8 duplex,
 				tp->ups_info.speed_duplex = NWAY_1000M_FULL;
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		default:
 			ret = -EINVAL;
 			goto out;
diff --git a/drivers/net/usb/rtl8150.c b/drivers/net/usb/rtl8150.c
index e7c630d375899..733f120c852b7 100644
--- a/drivers/net/usb/rtl8150.c
+++ b/drivers/net/usb/rtl8150.c
@@ -843,7 +843,7 @@ static int rtl8150_ioctl(struct net_device *netdev, struct ifreq *rq, int cmd)
 	switch (cmd) {
 	case SIOCDEVPRIVATE:
 		data[0] = dev->phy;
-		/* fall through */
+		fallthrough;
 	case SIOCDEVPRIVATE + 1:
 		read_mii_word(dev, dev->phy, (data[1] & 0x1f), &data[3]);
 		break;
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index e45935a5856aa..2b2a841cd9388 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -110,7 +110,7 @@ int usbnet_get_endpoints(struct usbnet *dev, struct usb_interface *intf)
 				if (!usb_endpoint_dir_in(&e->desc))
 					continue;
 				intr = 1;
-				/* FALLTHROUGH */
+				fallthrough;
 			case USB_ENDPOINT_XFER_BULK:
 				break;
 			default:
@@ -628,7 +628,7 @@ static void rx_complete (struct urb *urb)
 	/* data overrun ... flush fifo? */
 	case -EOVERFLOW:
 		dev->net->stats.rx_over_errors++;
-		// FALLTHROUGH
+		fallthrough;
 
 	default:
 		state = rx_cleanup;
@@ -1530,7 +1530,7 @@ static void usbnet_bh (struct timer_list *t)
 			continue;
 		case tx_done:
 			kfree(entry->urb->sg);
-			/* fall through */
+			fallthrough;
 		case rx_cleanup:
 			usb_free_urb (entry->urb);
 			dev_kfree_skb (skb);
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index e56cd562a6645..a475f48d43c44 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -610,10 +610,10 @@ static struct sk_buff *veth_xdp_rcv_one(struct veth_rq *rq,
 			goto xdp_xmit;
 		default:
 			bpf_warn_invalid_xdp_action(act);
-			/* fall through */
+			fallthrough;
 		case XDP_ABORTED:
 			trace_xdp_exception(rq->dev, xdp_prog, act);
-			/* fall through */
+			fallthrough;
 		case XDP_DROP:
 			stats->xdp_drops++;
 			goto err_xdp;
@@ -745,10 +745,10 @@ static struct sk_buff *veth_xdp_rcv_skb(struct veth_rq *rq,
 		goto xdp_xmit;
 	default:
 		bpf_warn_invalid_xdp_action(act);
-		/* fall through */
+		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(rq->dev, xdp_prog, act);
-		/* fall through */
+		fallthrough;
 	case XDP_DROP:
 		stats->xdp_drops++;
 		goto xdp_drop;
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 0ada48edf7495..263b005981bd7 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -724,7 +724,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
 			goto xdp_xmit;
 		default:
 			bpf_warn_invalid_xdp_action(act);
-			/* fall through */
+			fallthrough;
 		case XDP_ABORTED:
 			trace_xdp_exception(vi->dev, xdp_prog, act);
 		case XDP_DROP:
@@ -922,10 +922,10 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
 			goto xdp_xmit;
 		default:
 			bpf_warn_invalid_xdp_action(act);
-			/* fall through */
+			fallthrough;
 		case XDP_ABORTED:
 			trace_xdp_exception(vi->dev, xdp_prog, act);
-			/* fall through */
+			fallthrough;
 		case XDP_DROP:
 			if (unlikely(xdp_page != page))
 				__free_pages(xdp_page, 0);
diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c
index def27afa1c69f..1014693a5ceb2 100644
--- a/drivers/net/vmxnet3/vmxnet3_ethtool.c
+++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c
@@ -743,7 +743,7 @@ vmxnet3_get_rss_hash_opts(struct vmxnet3_adapter *adapter,
 	case ESP_V4_FLOW:
 		if (rss_fields & VMXNET3_RSS_FIELDS_ESPIP4)
 			info->data |= RXH_L4_B_0_1 | RXH_L4_B_2_3;
-			/* fallthrough */
+		fallthrough;
 	case SCTP_V4_FLOW:
 	case IPV4_FLOW:
 		info->data |= RXH_IP_SRC | RXH_IP_DST;
diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index 1ea15f2123ed5..8ccd086e06cb1 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -173,7 +173,7 @@ static netdev_tx_t lapbeth_xmit(struct sk_buff *skb,
 	case X25_IFACE_DISCONNECT:
 		if ((err = lapb_disconnect_request(dev)) != LAPB_OK)
 			pr_err("lapb_disconnect_request err: %d\n", err);
-		/* Fall thru */
+		fallthrough;
 	default:
 		goto drop;
 	}
diff --git a/drivers/net/wan/sdla.c b/drivers/net/wan/sdla.c
index 77ccf3672ede7..bc2c1c7fb1a45 100644
--- a/drivers/net/wan/sdla.c
+++ b/drivers/net/wan/sdla.c
@@ -413,7 +413,7 @@ static void sdla_errors(struct net_device *dev, int cmd, int dlci, int ret, int
 		case SDLA_RET_NO_BUFS:
 			if (cmd == SDLA_INFORMATION_WRITE)
 				break;
-			/* Else, fall through */
+			fallthrough;
 
 		default: 
 			netdev_dbg(dev, "Cmd 0x%02X generated return code 0x%02X\n",
diff --git a/drivers/net/wan/x25_asy.c b/drivers/net/wan/x25_asy.c
index de79844635958..7ee9805752083 100644
--- a/drivers/net/wan/x25_asy.c
+++ b/drivers/net/wan/x25_asy.c
@@ -330,7 +330,7 @@ static netdev_tx_t x25_asy_xmit(struct sk_buff *skb,
 		if (err != LAPB_OK)
 			netdev_err(dev, "lapb_disconnect_request error: %d\n",
 				   err);
-		/* fall through */
+		fallthrough;
 	default:
 		kfree_skb(skb);
 		return NETDEV_TX_OK;
diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c
index 4fe7c7e132c49..9afed3b133d3f 100644
--- a/drivers/net/wimax/i2400m/control.c
+++ b/drivers/net/wimax/i2400m/control.c
@@ -352,7 +352,7 @@ void i2400m_report_tlv_system_state(struct i2400m *i2400m,
 
 	case I2400M_SS_IDLE:
 		d_printf(1, dev, "entering BS-negotiated idle mode\n");
-		/* Fall through */
+		fallthrough;
 	case I2400M_SS_DISCONNECTING:
 	case I2400M_SS_DATA_PATH_CONNECTED:
 		wimax_state_change(wimax_dev, WIMAX_ST_CONNECTED);
diff --git a/drivers/net/wimax/i2400m/usb-fw.c b/drivers/net/wimax/i2400m/usb-fw.c
index 1f7709d24f352..27ab233650d53 100644
--- a/drivers/net/wimax/i2400m/usb-fw.c
+++ b/drivers/net/wimax/i2400m/usb-fw.c
@@ -135,7 +135,7 @@ ssize_t i2400mu_tx_bulk_out(struct i2400mu *i2400mu, void *buf, size_t buf_size)
 			msleep(10);	/* give the device some time */
 			goto retry;
 		}
-		/* fall through */
+		fallthrough;
 	case -EINVAL:			/* while removing driver */
 	case -ENODEV:			/* dev disconnect ... */
 	case -ENOENT:			/* just ignore it */
diff --git a/drivers/net/wimax/i2400m/usb-tx.c b/drivers/net/wimax/i2400m/usb-tx.c
index 3a0e7226768ad..3ba9d70cca1b4 100644
--- a/drivers/net/wimax/i2400m/usb-tx.c
+++ b/drivers/net/wimax/i2400m/usb-tx.c
@@ -136,7 +136,7 @@ int i2400mu_tx(struct i2400mu *i2400mu, struct i2400m_msg_hdr *tx_msg,
 			msleep(10);	/* give the device some time */
 			goto retry;
 		}
-		/* fall through */
+		fallthrough;
 	case -EINVAL:			/* while removing driver */
 	case -ENODEV:			/* dev disconnect ... */
 	case -ENOENT:			/* just ignore it */
diff --git a/drivers/net/wimax/i2400m/usb.c b/drivers/net/wimax/i2400m/usb.c
index 9659f9e1aaa64..b684e97ac9768 100644
--- a/drivers/net/wimax/i2400m/usb.c
+++ b/drivers/net/wimax/i2400m/usb.c
@@ -195,7 +195,7 @@ int __i2400mu_send_barker(struct i2400mu *i2400mu,
 			msleep(10);	/* give the device some time */
 			goto retry;
 		}
-		/* fall through */
+		fallthrough;
 	case -EINVAL:			/* while removing driver */
 	case -ENODEV:			/* dev disconnect ... */
 	case -ENOENT:			/* just ignore it */
diff --git a/drivers/net/xen-netback/hash.c b/drivers/net/xen-netback/hash.c
index 6b7532f7c936d..ff96f22648efd 100644
--- a/drivers/net/xen-netback/hash.c
+++ b/drivers/net/xen-netback/hash.c
@@ -393,7 +393,7 @@ void xenvif_dump_hash_info(struct xenvif *vif, struct seq_file *m)
 
 	case XEN_NETIF_CTRL_HASH_ALGORITHM_NONE:
 		seq_puts(m, "Hash Algorithm: NONE\n");
-		/* FALLTHRU */
+		fallthrough;
 	default:
 		return;
 	}
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 7e62a6ee76223..f1c1624cec8f5 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -448,7 +448,7 @@ static void frontend_changed(struct xenbus_device *dev,
 		set_backend_state(be, XenbusStateClosed);
 		if (xenbus_dev_is_online(dev))
 			break;
-		/* fall through - if not online */
+		fallthrough;	/* if not online */
 	case XenbusStateUnknown:
 		set_backend_state(be, XenbusStateClosed);
 		device_unregister(&dev->dev);
diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 458be6882b988..3e9895bec15f0 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -2341,7 +2341,7 @@ static void netback_changed(struct xenbus_device *dev,
 	case XenbusStateClosed:
 		if (dev->state == XenbusStateClosed)
 			break;
-		/* Fall through - Missed the backend's CLOSING state. */
+		fallthrough;	/* Missed the backend's CLOSING state */
 	case XenbusStateClosing:
 		xenbus_frontend_closed(dev);
 		break;
diff --git a/drivers/nfc/pn533/pn533.c b/drivers/nfc/pn533/pn533.c
index 346e084387f7d..f7464bd6d57cb 100644
--- a/drivers/nfc/pn533/pn533.c
+++ b/drivers/nfc/pn533/pn533.c
@@ -2321,7 +2321,7 @@ static int pn533_transceive(struct nfc_dev *nfc_dev,
 
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		/* jumbo frame ? */
 		if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
@@ -2448,7 +2448,7 @@ static void pn533_wq_mi_recv(struct work_struct *work)
 
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		skb_put_u8(skb, 1); /*TG*/
 
diff --git a/drivers/nfc/st21nfca/dep.c b/drivers/nfc/st21nfca/dep.c
index 0b9ca6d20ffad..8874d605b14f8 100644
--- a/drivers/nfc/st21nfca/dep.c
+++ b/drivers/nfc/st21nfca/dep.c
@@ -611,7 +611,7 @@ static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb,
 		switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) {
 		case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU:
 			pr_err("Received a ACK/NACK PDU\n");
-			/* fall through */
+			fallthrough;
 		case ST21NFCA_NFC_DEP_PFB_I_PDU:
 			info->dep_info.curr_nfc_dep_pni =
 			    ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1);
diff --git a/drivers/nfc/trf7970a.c b/drivers/nfc/trf7970a.c
index e46adaac1c635..3bd97c73f983f 100644
--- a/drivers/nfc/trf7970a.c
+++ b/drivers/nfc/trf7970a.c
@@ -1153,7 +1153,7 @@ static int trf7970a_switch_rf(struct nfc_digital_dev *ddev, bool on)
 			dev_err(trf->dev, "%s - Invalid request: %d %d\n",
 				__func__, trf->state, on);
 			ret = -EINVAL;
-			/* FALLTHROUGH */
+			fallthrough;
 		case TRF7970A_ST_IDLE:
 		case TRF7970A_ST_IDLE_RX_BLOCKED:
 		case TRF7970A_ST_WAIT_FOR_RX_DATA:
@@ -1960,7 +1960,7 @@ static void trf7970a_shutdown(struct trf7970a *trf)
 	case TRF7970A_ST_WAIT_TO_ISSUE_EOF:
 	case TRF7970A_ST_LISTENING:
 		trf7970a_send_err_upstream(trf, -ECANCELED);
-		/* FALLTHROUGH */
+		fallthrough;
 	case TRF7970A_ST_IDLE:
 	case TRF7970A_ST_IDLE_RX_BLOCKED:
 		trf7970a_switch_rf_off(trf);
diff --git a/drivers/ntb/ntb_transport.c b/drivers/ntb/ntb_transport.c
index e6d1f5b298f34..4a02561cfb965 100644
--- a/drivers/ntb/ntb_transport.c
+++ b/drivers/ntb/ntb_transport.c
@@ -1483,7 +1483,7 @@ static void ntb_rx_copy_callback(void *data,
 		case DMA_TRANS_READ_FAILED:
 		case DMA_TRANS_WRITE_FAILED:
 			entry->errors++;
-			/* fall through */
+			fallthrough;
 		case DMA_TRANS_ABORTED:
 		{
 			struct ntb_transport_qp *qp = entry->qp;
@@ -1739,7 +1739,7 @@ static void ntb_tx_copy_callback(void *data,
 		case DMA_TRANS_READ_FAILED:
 		case DMA_TRANS_WRITE_FAILED:
 			entry->errors++;
-			/* fall through */
+			fallthrough;
 		case DMA_TRANS_ABORTED:
 		{
 			void __iomem *offset =
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 88cff309d8e4f..96ee5a476c4d5 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -330,7 +330,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 		case NVME_CTRL_RESETTING:
 		case NVME_CTRL_CONNECTING:
 			changed = true;
-			/* FALLTHRU */
+			fallthrough;
 		default:
 			break;
 		}
@@ -340,7 +340,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 		case NVME_CTRL_NEW:
 		case NVME_CTRL_LIVE:
 			changed = true;
-			/* FALLTHRU */
+			fallthrough;
 		default:
 			break;
 		}
@@ -350,7 +350,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 		case NVME_CTRL_NEW:
 		case NVME_CTRL_RESETTING:
 			changed = true;
-			/* FALLTHRU */
+			fallthrough;
 		default:
 			break;
 		}
@@ -361,7 +361,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 		case NVME_CTRL_RESETTING:
 		case NVME_CTRL_CONNECTING:
 			changed = true;
-			/* FALLTHRU */
+			fallthrough;
 		default:
 			break;
 		}
@@ -371,7 +371,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 		case NVME_CTRL_DELETING:
 		case NVME_CTRL_DEAD:
 			changed = true;
-			/* FALLTHRU */
+			fallthrough;
 		default:
 			break;
 		}
@@ -380,7 +380,7 @@ bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl,
 		switch (old_state) {
 		case NVME_CTRL_DELETING:
 			changed = true;
-			/* FALLTHRU */
+			fallthrough;
 		default:
 			break;
 		}
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index ba725ae47305e..24d174a0623bc 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1244,7 +1244,7 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
 	switch (dev->ctrl.state) {
 	case NVME_CTRL_CONNECTING:
 		nvme_change_ctrl_state(&dev->ctrl, NVME_CTRL_DELETING);
-		/* fall through */
+		fallthrough;
 	case NVME_CTRL_DELETING:
 		dev_warn_ratelimited(dev->ctrl.device,
 			 "I/O %d QID %d timeout, disable controller\n",
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 44c76ffbb264c..610e0b6bb6e49 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1915,7 +1915,7 @@ static int nvme_rdma_cm_handler(struct rdma_cm_id *cm_id,
 	case RDMA_CM_EVENT_CONNECT_ERROR:
 	case RDMA_CM_EVENT_UNREACHABLE:
 		nvme_rdma_destroy_queue_ib(queue);
-		/* fall through */
+		fallthrough;
 	case RDMA_CM_EVENT_ADDR_ERROR:
 		dev_dbg(queue->ctrl->ctrl.device,
 			"CM error event %d\n", ev->event);
diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 62fbaecdc960c..f0c4bb47d22df 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -866,7 +866,6 @@ static void nvme_tcp_state_change(struct sock *sk)
 	case TCP_LAST_ACK:
 	case TCP_FIN_WAIT1:
 	case TCP_FIN_WAIT2:
-		/* fallthrough */
 		nvme_tcp_error_recovery(&queue->ctrl->ctrl);
 		break;
 	default:
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c
index b92f45f5cd5b1..ca7a58dae2757 100644
--- a/drivers/nvme/target/core.c
+++ b/drivers/nvme/target/core.c
@@ -73,7 +73,7 @@ inline u16 errno_to_nvme_status(struct nvmet_req *req, int errno)
 		status = NVME_SC_ACCESS_DENIED;
 		break;
 	case -EIO:
-		/* FALLTHRU */
+		fallthrough;
 	default:
 		req->error_loc = offsetof(struct nvme_common_command, opcode);
 		status = NVME_SC_INTERNAL | NVME_SC_DNR;
diff --git a/drivers/nvme/target/fcloop.c b/drivers/nvme/target/fcloop.c
index c97e60b71bbc7..3da067a8311e5 100644
--- a/drivers/nvme/target/fcloop.c
+++ b/drivers/nvme/target/fcloop.c
@@ -812,7 +812,7 @@ fcloop_fcp_op(struct nvmet_fc_target_port *tgtport,
 			break;
 
 		/* Fall-Thru to RSP handling */
-		/* FALLTHRU */
+		fallthrough;
 
 	case NVMET_FCOP_RSP:
 		if (fcpreq) {
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c
index 3dd6f566a240f..125dde3f410ee 100644
--- a/drivers/nvme/target/io-cmd-bdev.c
+++ b/drivers/nvme/target/io-cmd-bdev.c
@@ -139,7 +139,6 @@ static u16 blk_to_nvme_status(struct nvmet_req *req, blk_status_t blk_sts)
 		req->error_loc = offsetof(struct nvme_rw_command, nsid);
 		break;
 	case BLK_STS_IOERR:
-		/* fallthru */
 	default:
 		status = NVME_SC_INTERNAL | NVME_SC_DNR;
 		req->error_loc = offsetof(struct nvme_common_command, opcode);
diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c
index 3ccb59260b4ab..ae6620489457d 100644
--- a/drivers/nvme/target/rdma.c
+++ b/drivers/nvme/target/rdma.c
@@ -1758,7 +1758,7 @@ static int nvmet_rdma_cm_handler(struct rdma_cm_id *cm_id,
 			schedule_delayed_work(&port->repair_work, 0);
 			break;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case RDMA_CM_EVENT_DISCONNECTED:
 	case RDMA_CM_EVENT_TIMEWAIT_EXIT:
 		nvmet_rdma_queue_disconnect(queue);
@@ -1769,7 +1769,7 @@ static int nvmet_rdma_cm_handler(struct rdma_cm_id *cm_id,
 	case RDMA_CM_EVENT_REJECTED:
 		pr_debug("Connection rejected: %s\n",
 			 rdma_reject_msg(cm_id, event->status));
-		/* FALLTHROUGH */
+		fallthrough;
 	case RDMA_CM_EVENT_UNREACHABLE:
 	case RDMA_CM_EVENT_CONNECT_ERROR:
 		nvmet_rdma_queue_connect_fail(cm_id, queue);
diff --git a/drivers/parport/ieee1284.c b/drivers/parport/ieee1284.c
index f28d6a3c5a684..4547ac44c8d48 100644
--- a/drivers/parport/ieee1284.c
+++ b/drivers/parport/ieee1284.c
@@ -260,7 +260,7 @@ static void parport_ieee1284_terminate (struct parport *port)
 			port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;
 		}
 
-		/* fall through */
+		fallthrough;
 
 	default:
 		/* Terminate from all other modes. */
@@ -598,7 +598,7 @@ ssize_t parport_write (struct parport *port, const void *buffer, size_t len)
 	case IEEE1284_MODE_NIBBLE:
 	case IEEE1284_MODE_BYTE:
 		parport_negotiate (port, IEEE1284_MODE_COMPAT);
-		/* fall through */
+		fallthrough;
 	case IEEE1284_MODE_COMPAT:
 		pr_debug("%s: Using compatibility mode\n", port->name);
 		fn = port->ops->compat_write_data;
@@ -702,7 +702,7 @@ ssize_t parport_read (struct parport *port, void *buffer, size_t len)
 		if (parport_negotiate (port, IEEE1284_MODE_NIBBLE)) {
 			return -EIO;
 		}
-		/* fall through - to NIBBLE */
+		fallthrough;	/* to NIBBLE */
 	case IEEE1284_MODE_NIBBLE:
 		pr_debug("%s: Using nibble mode\n", port->name);
 		fn = port->ops->nibble_read_data;
diff --git a/drivers/parport/parport_pc.c b/drivers/parport/parport_pc.c
index 77e37e3cb3a09..eda4ded4d5e52 100644
--- a/drivers/parport/parport_pc.c
+++ b/drivers/parport/parport_pc.c
@@ -1647,7 +1647,7 @@ static int parport_ECP_supported(struct parport *pb)
 		break;
 	default:
 		pr_warn("0x%lx: Unknown implementation ID\n", pb->base);
-		/* Fall through - Assume 1 */
+		fallthrough;	/* Assume 1 */
 	case 1:
 		pword = 1;
 	}
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 90df28c7cb0cf..5fef2613b223a 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -439,7 +439,7 @@ static int imx6_pcie_enable_ref_clk(struct imx6_pcie *imx6_pcie)
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX6SX_GPR12_PCIE_TEST_POWERDOWN, 0);
 		break;
-	case IMX6QP:		/* FALLTHROUGH */
+	case IMX6QP:
 	case IMX6Q:
 		/* power up core phy and enable ref clock */
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR1,
@@ -642,7 +642,7 @@ static void imx6_pcie_init_phy(struct imx6_pcie *imx6_pcie)
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX6SX_GPR12_PCIE_RX_EQ_MASK,
 				   IMX6SX_GPR12_PCIE_RX_EQ_2);
-		/* FALLTHROUGH */
+		fallthrough;
 	default:
 		regmap_update_bits(imx6_pcie->iomuxc_gpr, IOMUXC_GPR12,
 				   IMX6Q_GPR12_PCIE_CTL_2, 0 << 10);
@@ -1105,7 +1105,7 @@ static int imx6_pcie_probe(struct platform_device *pdev)
 			dev_err(dev, "pcie_aux clock source missing or invalid\n");
 			return PTR_ERR(imx6_pcie->pcie_aux);
 		}
-		/* fall through */
+		fallthrough;
 	case IMX7D:
 		if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR)
 			imx6_pcie->controller_id = 1;
diff --git a/drivers/pci/controller/pci-rcar-gen2.c b/drivers/pci/controller/pci-rcar-gen2.c
index c9530038ca9a5..afde4aa8f6dcb 100644
--- a/drivers/pci/controller/pci-rcar-gen2.c
+++ b/drivers/pci/controller/pci-rcar-gen2.c
@@ -223,7 +223,7 @@ static void rcar_pci_setup(struct rcar_pci_priv *priv)
 		pr_warn("unknown window size %ld - defaulting to 256M\n",
 			window_size);
 		window_size = SZ_256M;
-		/* fall-through */
+		fallthrough;
 	case SZ_256M:
 		val |= RCAR_USBCTR_PCIAHB_WIN1_256M;
 		break;
diff --git a/drivers/pci/hotplug/ibmphp_res.c b/drivers/pci/hotplug/ibmphp_res.c
index 5c93aa14f0de2..ae9acc77d14f1 100644
--- a/drivers/pci/hotplug/ibmphp_res.c
+++ b/drivers/pci/hotplug/ibmphp_res.c
@@ -1941,7 +1941,7 @@ static int __init update_bridge_ranges(struct bus_node **bus)
 						break;
 					case PCI_HEADER_TYPE_BRIDGE:
 						function = 0x8;
-						/* fall through */
+						fallthrough;
 					case PCI_HEADER_TYPE_MULTIBRIDGE:
 						/* We assume here that only 1 bus behind the bridge
 						   TO DO: add functionality for several:
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index 6503d15effbbd..9f85815b4f534 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -236,7 +236,7 @@ void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events)
 	switch (ctrl->state) {
 	case BLINKINGOFF_STATE:
 		cancel_delayed_work(&ctrl->button_work);
-		/* fall through */
+		fallthrough;
 	case ON_STATE:
 		ctrl->state = POWEROFF_STATE;
 		mutex_unlock(&ctrl->state_lock);
@@ -265,7 +265,7 @@ void pciehp_handle_presence_or_link_change(struct controller *ctrl, u32 events)
 	switch (ctrl->state) {
 	case BLINKINGON_STATE:
 		cancel_delayed_work(&ctrl->button_work);
-		/* fall through */
+		fallthrough;
 	case OFF_STATE:
 		ctrl->state = POWERON_STATE;
 		mutex_unlock(&ctrl->state_lock);
diff --git a/drivers/pci/hotplug/shpchp_ctrl.c b/drivers/pci/hotplug/shpchp_ctrl.c
index afdc52d1cae75..65502e3f7b4fb 100644
--- a/drivers/pci/hotplug/shpchp_ctrl.c
+++ b/drivers/pci/hotplug/shpchp_ctrl.c
@@ -642,7 +642,7 @@ int shpchp_sysfs_enable_slot(struct slot *p_slot)
 	switch (p_slot->state) {
 	case BLINKINGON_STATE:
 		cancel_delayed_work(&p_slot->work);
-		/* fall through */
+		fallthrough;
 	case STATIC_STATE:
 		p_slot->state = POWERON_STATE;
 		mutex_unlock(&p_slot->lock);
@@ -678,7 +678,7 @@ int shpchp_sysfs_disable_slot(struct slot *p_slot)
 	switch (p_slot->state) {
 	case BLINKINGOFF_STATE:
 		cancel_delayed_work(&p_slot->work);
-		/* fall through */
+		fallthrough;
 	case STATIC_STATE:
 		p_slot->state = POWEROFF_STATE;
 		mutex_unlock(&p_slot->lock);
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index a458c46d7e39d..e39c5499770ff 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -1049,7 +1049,7 @@ static int pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state)
 		if ((pmcsr & PCI_PM_CTRL_STATE_MASK) == PCI_D3hot
 		 && !(pmcsr & PCI_PM_CTRL_NO_SOFT_RESET))
 			need_restore = true;
-		/* Fall-through - force to D0 */
+		fallthrough;	/* force to D0 */
 	default:
 		pmcsr = 0;
 		break;
@@ -2541,7 +2541,7 @@ static pci_power_t pci_target_state(struct pci_dev *dev, bool wakeup)
 		case PCI_D2:
 			if (pci_no_d1d2(dev))
 				break;
-			/* else, fall through */
+			fallthrough;
 		default:
 			target_state = state;
 		}
diff --git a/drivers/pci/proc.c b/drivers/pci/proc.c
index bd2b691fa7a33..d35186b01d983 100644
--- a/drivers/pci/proc.c
+++ b/drivers/pci/proc.c
@@ -231,7 +231,7 @@ static long proc_bus_pci_ioctl(struct file *file, unsigned int cmd,
 		}
 		/* If arch decided it can't, fall through... */
 #endif /* HAVE_PCI_MMAP */
-		/* fall through */
+		fallthrough;
 	default:
 		ret = -EINVAL;
 		break;
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index bdf9b52567e03..2a589b6d6ed85 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1730,7 +1730,7 @@ static void quirk_jmicron_ata(struct pci_dev *pdev)
 	case PCI_DEVICE_ID_JMICRON_JMB366:
 		/* Redirect IDE second PATA port to the right spot */
 		conf5 |= (1 << 24);
-		/* Fall through */
+		fallthrough;
 	case PCI_DEVICE_ID_JMICRON_JMB361:
 	case PCI_DEVICE_ID_JMICRON_JMB363:
 	case PCI_DEVICE_ID_JMICRON_JMB369:
@@ -2224,7 +2224,7 @@ static void quirk_netmos(struct pci_dev *dev)
 		if (dev->subsystem_vendor == PCI_VENDOR_ID_IBM &&
 				dev->subsystem_device == 0x0299)
 			return;
-		/* else, fall through */
+		fallthrough;
 	case PCI_DEVICE_ID_NETMOS_9735:
 	case PCI_DEVICE_ID_NETMOS_9745:
 	case PCI_DEVICE_ID_NETMOS_9845:
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 3951e02b7deda..2ce636937c6ea 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -1253,7 +1253,7 @@ void __pci_bus_size_bridges(struct pci_bus *bus, struct list_head *realloc_head)
 			additional_mmio_size = pci_hotplug_mmio_size;
 			additional_mmio_pref_size = pci_hotplug_mmio_pref_size;
 		}
-		/* Fall through */
+		fallthrough;
 	default:
 		pbus_size_io(bus, realloc_head ? 0 : additional_io_size,
 			     additional_io_size, realloc_head);
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index fab267e359e74..c0e85be598c11 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -1096,7 +1096,7 @@ static void __ref pcifront_backend_changed(struct xenbus_device *xdev,
 	case XenbusStateClosed:
 		if (xdev->state == XenbusStateClosed)
 			break;
-		/* fall through - Missed the backend's CLOSING state. */
+		fallthrough;	/* Missed the backend's CLOSING state */
 	case XenbusStateClosing:
 		dev_warn(&xdev->dev, "backend going away!\n");
 		pcifront_try_disconnect(pdev);
diff --git a/drivers/pcmcia/db1xxx_ss.c b/drivers/pcmcia/db1xxx_ss.c
index 590e594092f25..a7c7c7cd23269 100644
--- a/drivers/pcmcia/db1xxx_ss.c
+++ b/drivers/pcmcia/db1xxx_ss.c
@@ -255,10 +255,10 @@ static int db1x_pcmcia_configure(struct pcmcia_socket *skt,
 	switch (state->Vcc) {
 	case 50:
 		++v;
-		/* fall through */
+		fallthrough;
 	case 33:
 		++v;
-		/* fall through */
+		fallthrough;
 	case 0:
 		break;
 	default:
@@ -269,11 +269,11 @@ static int db1x_pcmcia_configure(struct pcmcia_socket *skt,
 	switch (state->Vpp) {
 	case 12:
 		++p;
-		/* fall through */
+		fallthrough;
 	case 33:
 	case 50:
 		++p;
-		/* fall through */
+		fallthrough;
 	case 0:
 		break;
 	default:
diff --git a/drivers/perf/arm-ccn.c b/drivers/perf/arm-ccn.c
index 7b7d23f257139..a0a71c1df042a 100644
--- a/drivers/perf/arm-ccn.c
+++ b/drivers/perf/arm-ccn.c
@@ -1404,7 +1404,7 @@ static int arm_ccn_init_nodes(struct arm_ccn *ccn, int region,
 		break;
 	case CCN_TYPE_SBAS:
 		ccn->sbas_present = 1;
-		/* Fall-through */
+		fallthrough;
 	default:
 		component = &ccn->node[id];
 		break;
diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index e51ddb6d63eda..cc00915ad6d19 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -1002,7 +1002,7 @@ static void __arm_spe_pmu_dev_probe(void *info)
 	default:
 		dev_warn(dev, "unknown PMSIDR_EL1.Interval [%d]; assuming 8\n",
 			 fld);
-		/* Fallthrough */
+		fallthrough;
 	case 8:
 		spe_pmu->min_period = 4096;
 	}
@@ -1021,7 +1021,7 @@ static void __arm_spe_pmu_dev_probe(void *info)
 	default:
 		dev_warn(dev, "unknown PMSIDR_EL1.CountSize [%d]; assuming 2\n",
 			 fld);
-		/* Fallthrough */
+		fallthrough;
 	case 2:
 		spe_pmu->counter_sz = 12;
 	}
diff --git a/drivers/phy/qualcomm/phy-qcom-usb-hs.c b/drivers/phy/qualcomm/phy-qcom-usb-hs.c
index 61054272a7c8b..327df1a99f773 100644
--- a/drivers/phy/qualcomm/phy-qcom-usb-hs.c
+++ b/drivers/phy/qualcomm/phy-qcom-usb-hs.c
@@ -53,7 +53,7 @@ static int qcom_usb_hs_phy_set_mode(struct phy *phy,
 		case PHY_MODE_USB_OTG:
 		case PHY_MODE_USB_HOST:
 			val |= ULPI_INT_IDGRD;
-			/* fall through */
+			fallthrough;
 		case PHY_MODE_USB_DEVICE:
 			val |= ULPI_INT_SESS_VALID;
 		default:
diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index a84e9f027fc46..46ebdb1460a3d 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -546,7 +546,7 @@ static void rockchip_usb2phy_otg_sm_work(struct work_struct *work)
 		rport->state = OTG_STATE_B_IDLE;
 		if (!vbus_attach)
 			rockchip_usb2phy_power_off(rport->phy);
-		/* fall through */
+		fallthrough;
 	case OTG_STATE_B_IDLE:
 		if (extcon_get_state(rphy->edev, EXTCON_USB_HOST) > 0) {
 			dev_dbg(&rport->phy->dev, "usb otg host connect\n");
@@ -754,11 +754,11 @@ static void rockchip_chg_detect_work(struct work_struct *work)
 			rphy->chg_type = POWER_SUPPLY_TYPE_USB_DCP;
 		else
 			rphy->chg_type = POWER_SUPPLY_TYPE_USB_CDP;
-		/* fall through */
+		fallthrough;
 	case USB_CHG_STATE_SECONDARY_DONE:
 		rphy->chg_state = USB_CHG_STATE_DETECTED;
 		delay = 0;
-		/* fall through */
+		fallthrough;
 	case USB_CHG_STATE_DETECTED:
 		/* put the controller in normal mode */
 		property_enable(base, &rphy->phy_cfg->chg_det.opmode, true);
@@ -835,7 +835,7 @@ static void rockchip_usb2phy_sm_work(struct work_struct *work)
 			dev_dbg(&rport->phy->dev, "FS/LS online\n");
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case PHY_STATE_CONNECT:
 		if (rport->suspended) {
 			dev_dbg(&rport->phy->dev, "Connected\n");
diff --git a/drivers/platform/olpc/olpc-xo175-ec.c b/drivers/platform/olpc/olpc-xo175-ec.c
index 5e1d14e35f20b..0d46706afd2da 100644
--- a/drivers/platform/olpc/olpc-xo175-ec.c
+++ b/drivers/platform/olpc/olpc-xo175-ec.c
@@ -431,7 +431,7 @@ static void olpc_xo175_ec_complete(void *arg)
 			input_sync(priv->pwrbtn);
 			input_report_key(priv->pwrbtn, KEY_POWER, 0);
 			input_sync(priv->pwrbtn);
-			/* fall through */
+			fallthrough;
 		case EVENT_POWER_PRESS_WAKE:
 		case EVENT_TIMED_HOST_WAKE:
 			pm_wakeup_event(priv->pwrbtn->dev.parent,
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index 60c18f21588dd..49f4b73be513f 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -1001,7 +1001,7 @@ static acpi_status WMID_get_u32(u32 *value, u32 cap)
 			*value = tmp & 0x1;
 			return 0;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		return AE_ERROR;
 	}
@@ -1328,7 +1328,7 @@ static acpi_status get_u32(u32 *value, u32 cap)
 			status = AMW0_get_u32(value, cap);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case ACER_WMID:
 		status = WMID_get_u32(value, cap);
 		break;
@@ -1371,7 +1371,7 @@ static acpi_status set_u32(u32 value, u32 cap)
 
 				return AMW0_set_u32(value, cap);
 			}
-			/* fall through */
+			fallthrough;
 		case ACER_WMID:
 			return WMID_set_u32(value, cap);
 		case ACER_WMID_v2:
@@ -1381,7 +1381,7 @@ static acpi_status set_u32(u32 value, u32 cap)
 				return wmid_v2_set_u32(value, cap);
 			else if (wmi_has_guid(WMID_GUID2))
 				return WMID_set_u32(value, cap);
-			/* fall through */
+			fallthrough;
 		default:
 			return AE_BAD_PARAMETER;
 		}
diff --git a/drivers/platform/x86/dell-laptop.c b/drivers/platform/x86/dell-laptop.c
index 5e9c2296931c9..70edc5bb3a146 100644
--- a/drivers/platform/x86/dell-laptop.c
+++ b/drivers/platform/x86/dell-laptop.c
@@ -1587,10 +1587,10 @@ static ssize_t kbd_led_timeout_store(struct device *dev,
 		switch (unit) {
 		case KBD_TIMEOUT_DAYS:
 			value *= 24;
-			/* fall through */
+			fallthrough;
 		case KBD_TIMEOUT_HOURS:
 			value *= 60;
-			/* fall through */
+			fallthrough;
 		case KBD_TIMEOUT_MINUTES:
 			value *= 60;
 			unit = KBD_TIMEOUT_SECONDS;
diff --git a/drivers/platform/x86/surfacepro3_button.c b/drivers/platform/x86/surfacepro3_button.c
index ec515223f6549..d8afed5db94c5 100644
--- a/drivers/platform/x86/surfacepro3_button.c
+++ b/drivers/platform/x86/surfacepro3_button.c
@@ -84,28 +84,28 @@ static void surface_button_notify(struct acpi_device *device, u32 event)
 	/* Power button press,release handle */
 	case SURFACE_BUTTON_NOTIFY_PRESS_POWER:
 		pressed = true;
-		/*fall through*/
+		fallthrough;
 	case SURFACE_BUTTON_NOTIFY_RELEASE_POWER:
 		key_code = KEY_POWER;
 		break;
 	/* Home button press,release handle */
 	case SURFACE_BUTTON_NOTIFY_PRESS_HOME:
 		pressed = true;
-		/*fall through*/
+		fallthrough;
 	case SURFACE_BUTTON_NOTIFY_RELEASE_HOME:
 		key_code = KEY_LEFTMETA;
 		break;
 	/* Volume up button press,release handle */
 	case SURFACE_BUTTON_NOTIFY_PRESS_VOLUME_UP:
 		pressed = true;
-		/*fall through*/
+		fallthrough;
 	case SURFACE_BUTTON_NOTIFY_RELEASE_VOLUME_UP:
 		key_code = KEY_VOLUMEUP;
 		break;
 	/* Volume down button press,release handle */
 	case SURFACE_BUTTON_NOTIFY_PRESS_VOLUME_DOWN:
 		pressed = true;
-		/*fall through*/
+		fallthrough;
 	case SURFACE_BUTTON_NOTIFY_RELEASE_VOLUME_DOWN:
 		key_code = KEY_VOLUMEDOWN;
 		break;
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 4864a5c189d46..9c4df41687a39 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -4060,7 +4060,7 @@ static bool hotkey_notify_6xxx(const u32 hkey,
 		 * AC status changed; can be triggered by plugging or
 		 * unplugging AC adapter, docking or undocking. */
 
-		/* fallthrough */
+		fallthrough;
 
 	case TP_HKEY_EV_KEY_NUMLOCK:
 	case TP_HKEY_EV_KEY_FN:
@@ -4176,7 +4176,7 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
 				known_ev = true;
 				break;
 			}
-			/* fallthrough - to default */
+			fallthrough;	/* to default */
 		default:
 			known_ev = false;
 		}
@@ -6266,7 +6266,7 @@ static int thermal_get_sensor(int idx, s32 *value)
 			idx -= 8;
 		}
 #endif
-		/* fallthrough */
+		fallthrough;
 	case TPACPI_THERMAL_TPEC_8:
 		if (idx <= 7) {
 			if (!acpi_ec_read(t + idx, &tmp))
diff --git a/drivers/platform/x86/toshiba_acpi.c b/drivers/platform/x86/toshiba_acpi.c
index 36fff00af9ebd..e557d757c6470 100644
--- a/drivers/platform/x86/toshiba_acpi.c
+++ b/drivers/platform/x86/toshiba_acpi.c
@@ -2748,7 +2748,7 @@ static void toshiba_acpi_process_hotkeys(struct toshiba_acpi_dev *dev)
 				result = hci_write(dev, HCI_SYSTEM_EVENT, 1);
 				if (result == TOS_SUCCESS)
 					pr_notice("Re-enabled hotkeys\n");
-				/* Fall through */
+				fallthrough;
 			default:
 				retries--;
 				break;
diff --git a/drivers/power/supply/ab8500_charger.c b/drivers/power/supply/ab8500_charger.c
index 9469fe182d02a..db65be0269206 100644
--- a/drivers/power/supply/ab8500_charger.c
+++ b/drivers/power/supply/ab8500_charger.c
@@ -748,7 +748,7 @@ static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
 						USB_CH_IP_CUR_LVL_1P5;
 			break;
 		}
-		/* else, fall through */
+		fallthrough;
 	case USB_STAT_HM_IDGND:
 		dev_err(di->dev, "USB Type - Charging not allowed\n");
 		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
@@ -2410,7 +2410,7 @@ static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
 		 * of 1sec for enabling charging
 		 */
 		msleep(1000);
-		/* Intentional fall through */
+		fallthrough;
 	case AB8500_BM_USB_STATE_CONFIGURED:
 		/*
 		 * USB is configured, enable charging with the charging
diff --git a/drivers/power/supply/ab8500_fg.c b/drivers/power/supply/ab8500_fg.c
index 751c4f6c74871..7eec415c82a35 100644
--- a/drivers/power/supply/ab8500_fg.c
+++ b/drivers/power/supply/ab8500_fg.c
@@ -1542,7 +1542,7 @@ static void ab8500_fg_algorithm_discharging(struct ab8500_fg *di)
 		ab8500_fg_discharge_state_to(di,
 			AB8500_FG_DISCHARGE_INITMEASURING);
 
-		/* Intentional fallthrough */
+		fallthrough;
 	case AB8500_FG_DISCHARGE_INITMEASURING:
 		/*
 		 * Discard a number of samples during startup.
@@ -1572,7 +1572,7 @@ static void ab8500_fg_algorithm_discharging(struct ab8500_fg *di)
 		ab8500_fg_discharge_state_to(di,
 			AB8500_FG_DISCHARGE_RECOVERY);
 
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case AB8500_FG_DISCHARGE_RECOVERY:
 		sleep_time = di->bm->fg_params->recovery_sleep_timer;
diff --git a/drivers/power/supply/abx500_chargalg.c b/drivers/power/supply/abx500_chargalg.c
index 2fb33a07879a3..175c4f3d79553 100644
--- a/drivers/power/supply/abx500_chargalg.c
+++ b/drivers/power/supply/abx500_chargalg.c
@@ -1419,7 +1419,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 		abx500_chargalg_stop_charging(di);
 		di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
 		abx500_chargalg_state_to(di, STATE_HANDHELD);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_HANDHELD:
 		break;
@@ -1435,7 +1435,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 		di->maintenance_chg = false;
 		abx500_chargalg_state_to(di, STATE_SUSPENDED);
 		power_supply_changed(di->chargalg_psy);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_SUSPENDED:
 		/* CHARGING is suspended */
@@ -1444,7 +1444,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 	case STATE_BATT_REMOVED_INIT:
 		abx500_chargalg_stop_charging(di);
 		abx500_chargalg_state_to(di, STATE_BATT_REMOVED);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_BATT_REMOVED:
 		if (!di->events.batt_rem)
@@ -1454,7 +1454,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 	case STATE_HW_TEMP_PROTECT_INIT:
 		abx500_chargalg_stop_charging(di);
 		abx500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_HW_TEMP_PROTECT:
 		if (!di->events.main_thermal_prot &&
@@ -1465,7 +1465,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 	case STATE_OVV_PROTECT_INIT:
 		abx500_chargalg_stop_charging(di);
 		abx500_chargalg_state_to(di, STATE_OVV_PROTECT);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_OVV_PROTECT:
 		if (!di->events.vbus_ovv &&
@@ -1479,7 +1479,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 	case STATE_CHG_NOT_OK_INIT:
 		abx500_chargalg_stop_charging(di);
 		abx500_chargalg_state_to(di, STATE_CHG_NOT_OK);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_CHG_NOT_OK:
 		if (!di->events.mainextchnotok &&
@@ -1490,7 +1490,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 	case STATE_SAFETY_TIMER_EXPIRED_INIT:
 		abx500_chargalg_stop_charging(di);
 		abx500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_SAFETY_TIMER_EXPIRED:
 		/* We exit this state when charger is removed */
@@ -1537,7 +1537,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 	case STATE_WAIT_FOR_RECHARGE_INIT:
 		abx500_chargalg_hold_charging(di);
 		abx500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_WAIT_FOR_RECHARGE:
 		if (di->batt_data.percent <=
@@ -1558,7 +1558,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 				di->bm->batt_id].maint_a_cur_lvl);
 		abx500_chargalg_state_to(di, STATE_MAINTENANCE_A);
 		power_supply_changed(di->chargalg_psy);
-		/* Intentional fallthrough*/
+		fallthrough;
 
 	case STATE_MAINTENANCE_A:
 		if (di->events.maintenance_timer_expired) {
@@ -1578,7 +1578,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 				di->bm->batt_id].maint_b_cur_lvl);
 		abx500_chargalg_state_to(di, STATE_MAINTENANCE_B);
 		power_supply_changed(di->chargalg_psy);
-		/* Intentional fallthrough*/
+		fallthrough;
 
 	case STATE_MAINTENANCE_B:
 		if (di->events.maintenance_timer_expired) {
@@ -1597,7 +1597,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 		di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
 		abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH);
 		power_supply_changed(di->chargalg_psy);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_TEMP_LOWHIGH:
 		if (!di->events.btemp_lowhigh)
@@ -1607,7 +1607,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 	case STATE_WD_EXPIRED_INIT:
 		abx500_chargalg_stop_charging(di);
 		abx500_chargalg_state_to(di, STATE_WD_EXPIRED);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_WD_EXPIRED:
 		if (!di->events.ac_wd_expired &&
@@ -1618,7 +1618,7 @@ static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
 	case STATE_TEMP_UNDEROVER_INIT:
 		abx500_chargalg_stop_charging(di);
 		abx500_chargalg_state_to(di, STATE_TEMP_UNDEROVER);
-		/* Intentional fallthrough */
+		fallthrough;
 
 	case STATE_TEMP_UNDEROVER:
 		if (!di->events.btemp_underover)
diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c
index d01dc0332edc7..0eaa86c52874a 100644
--- a/drivers/power/supply/axp20x_usb_power.c
+++ b/drivers/power/supply/axp20x_usb_power.c
@@ -349,7 +349,7 @@ static int axp20x_usb_power_set_current_max(struct axp20x_usb_power *power,
 	case 100000:
 		if (power->axp20x_id == AXP221_ID)
 			return -EINVAL;
-		/* fall through */
+		fallthrough;
 	case 500000:
 	case 900000:
 		val = (900000 - intval) / 400000;
diff --git a/drivers/power/supply/cros_usbpd-charger.c b/drivers/power/supply/cros_usbpd-charger.c
index 2a45e84447fe7..d89e08efd2ad0 100644
--- a/drivers/power/supply/cros_usbpd-charger.c
+++ b/drivers/power/supply/cros_usbpd-charger.c
@@ -383,7 +383,7 @@ static int cros_usbpd_charger_get_prop(struct power_supply *psy,
 		 */
 		if (ec_device->mkbp_event_supported || port->psy_online)
 			break;
-		/* fall through */
+		fallthrough;
 	case POWER_SUPPLY_PROP_CURRENT_MAX:
 	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
 	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
diff --git a/drivers/power/supply/max8925_power.c b/drivers/power/supply/max8925_power.c
index 5fca4960f440a..8878f9131184f 100644
--- a/drivers/power/supply/max8925_power.c
+++ b/drivers/power/supply/max8925_power.c
@@ -121,7 +121,7 @@ static irqreturn_t max8925_charger_handler(int irq, void *data)
 	case MAX8925_IRQ_VCHG_THM_OK_F:
 		/* Battery is not ready yet */
 		dev_dbg(chip->dev, "Battery temperature is out of range\n");
-		/* Fall through */
+		fallthrough;
 	case MAX8925_IRQ_VCHG_DC_OVP:
 		dev_dbg(chip->dev, "Error detection\n");
 		__set_charger(info, 0);
diff --git a/drivers/power/supply/wm831x_power.c b/drivers/power/supply/wm831x_power.c
index 65832bc229f6c..18b33f14dfeef 100644
--- a/drivers/power/supply/wm831x_power.c
+++ b/drivers/power/supply/wm831x_power.c
@@ -665,7 +665,7 @@ static int wm831x_power_probe(struct platform_device *pdev)
 		break;
 	default:
 		dev_err(&pdev->dev, "Failed to find USB phy: %d\n", ret);
-		/* fall-through */
+		fallthrough;
 	case -EPROBE_DEFER:
 		goto err_bat_irq;
 		break;
diff --git a/drivers/power/supply/wm8350_power.c b/drivers/power/supply/wm8350_power.c
index 26923af574f43..e05cee457471b 100644
--- a/drivers/power/supply/wm8350_power.c
+++ b/drivers/power/supply/wm8350_power.c
@@ -227,7 +227,7 @@ static irqreturn_t wm8350_charger_handler(int irq, void *data)
 	case WM8350_IRQ_EXT_USB_FB:
 	case WM8350_IRQ_EXT_WALL_FB:
 		wm8350_charger_config(wm8350, policy);
-		/* Fall through */
+		fallthrough;
 	case WM8350_IRQ_EXT_BAT_FB:
 		power_supply_changed(power->battery);
 		power_supply_changed(power->usb);
diff --git a/drivers/ps3/ps3av.c b/drivers/ps3/ps3av.c
index 24f04ffdd9861..9d66257e1da5c 100644
--- a/drivers/ps3/ps3av.c
+++ b/drivers/ps3/ps3av.c
@@ -769,7 +769,7 @@ static int ps3av_auto_videomode(struct ps3av_pkt_av_get_hw_conf *av_hw_conf)
 		switch (info->monitor_type) {
 		case PS3AV_MONITOR_TYPE_DVI:
 			dvi = PS3AV_MODE_DVI;
-			/* fall through */
+			fallthrough;
 		case PS3AV_MONITOR_TYPE_HDMI:
 			id = ps3av_hdmi_get_id(info);
 			break;
diff --git a/drivers/ps3/ps3av_cmd.c b/drivers/ps3/ps3av_cmd.c
index f0e650cc866e5..c22206652f06f 100644
--- a/drivers/ps3/ps3av_cmd.c
+++ b/drivers/ps3/ps3av_cmd.c
@@ -693,11 +693,11 @@ void ps3av_cmd_set_audio_mode(struct ps3av_pkt_audio_mode *audio, u32 avport,
 	switch (ch) {
 	case PS3AV_CMD_AUDIO_NUM_OF_CH_8:
 		audio->audio_enable[3] = 1;
-		/* fall through */
+		fallthrough;
 	case PS3AV_CMD_AUDIO_NUM_OF_CH_6:
 		audio->audio_enable[2] = 1;
 		audio->audio_enable[1] = 1;
-		/* fall through */
+		fallthrough;
 	case PS3AV_CMD_AUDIO_NUM_OF_CH_2:
 	default:
 		audio->audio_enable[0] = 1;
diff --git a/drivers/rapidio/devices/rio_mport_cdev.c b/drivers/rapidio/devices/rio_mport_cdev.c
index c07ceec3c6d49..a30342942e26f 100644
--- a/drivers/rapidio/devices/rio_mport_cdev.c
+++ b/drivers/rapidio/devices/rio_mport_cdev.c
@@ -2150,7 +2150,7 @@ static void mport_release_mapping(struct kref *ref)
 	switch (map->dir) {
 	case MAP_INBOUND:
 		rio_unmap_inb_region(mport, map->phys_addr);
-		/* fall through */
+		fallthrough;
 	case MAP_DMA:
 		dma_free_coherent(mport->dev.parent, map->size,
 				  map->virt_addr, map->phys_addr);
diff --git a/drivers/regulator/axp20x-regulator.c b/drivers/regulator/axp20x-regulator.c
index fbc95cadaf539..1bacb37e8a992 100644
--- a/drivers/regulator/axp20x-regulator.c
+++ b/drivers/regulator/axp20x-regulator.c
@@ -399,7 +399,7 @@ static int axp20x_set_ramp_delay(struct regulator_dev *rdev, int ramp)
 		if (rate_count > 0)
 			break;
 
-		/* fall through */
+		fallthrough;
 	default:
 		/* Not supported for this regulator */
 		return -ENOTSUPP;
@@ -1022,7 +1022,7 @@ static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
 		 * (See include/linux/mfd/axp20x.h)
 		 */
 		reg = AXP803_DCDC_FREQ_CTRL;
-		/* Fall through - to the check below.*/
+		fallthrough;	/* to the check below */
 	case AXP806_ID:
 		/*
 		 * AXP806 also have DCDC work frequency setting register at a
@@ -1030,7 +1030,7 @@ static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
 		 */
 		if (axp20x->variant == AXP806_ID)
 			reg = AXP806_DCDC_FREQ_CTRL;
-		/* Fall through */
+		fallthrough;
 	case AXP221_ID:
 	case AXP223_ID:
 	case AXP809_ID:
@@ -1118,7 +1118,7 @@ static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 work
 		 * (See include/linux/mfd/axp20x.h)
 		 */
 		reg = AXP806_DCDC_MODE_CTRL2;
-		 /* Fall through - to the check below. */
+		fallthrough;	/* to the check below */
 	case AXP221_ID:
 	case AXP223_ID:
 	case AXP809_ID:
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 75ff7c563c5d6..3fd3599146906 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1895,7 +1895,7 @@ struct regulator *_regulator_get(struct device *dev, const char *id,
 		case EXCLUSIVE_GET:
 			dev_warn(dev,
 				 "dummy supplies not allowed for exclusive requests\n");
-			/* fall through */
+			fallthrough;
 
 		default:
 			return ERR_PTR(-ENODEV);
diff --git a/drivers/regulator/slg51000-regulator.c b/drivers/regulator/slg51000-regulator.c
index 44e4cecbf6dec..87b020d0b958d 100644
--- a/drivers/regulator/slg51000-regulator.c
+++ b/drivers/regulator/slg51000-regulator.c
@@ -319,7 +319,7 @@ static int slg51000_regulator_init(struct slg51000 *chip)
 				rdesc->linear_min_sel = 0;
 				break;
 			}
-			/* Fall through - to the check below.*/
+			fallthrough;	/* to the check below */
 
 		default:
 			rdesc->linear_min_sel = vsel_range[0];
diff --git a/drivers/regulator/twl6030-regulator.c b/drivers/regulator/twl6030-regulator.c
index f7db250a75839..430265c404d65 100644
--- a/drivers/regulator/twl6030-regulator.c
+++ b/drivers/regulator/twl6030-regulator.c
@@ -312,7 +312,7 @@ static int twl6030smps_list_voltage(struct regulator_dev *rdev, unsigned index)
 	switch (info->flags) {
 	case SMPS_OFFSET_EN:
 		voltage = 100000;
-		/* fall through */
+		fallthrough;
 	case 0:
 		switch (index) {
 		case 0:
diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
index 6955fab0a78b7..d94b7391bf9dd 100644
--- a/drivers/remoteproc/omap_remoteproc.c
+++ b/drivers/remoteproc/omap_remoteproc.c
@@ -511,7 +511,6 @@ static void omap_rproc_mbox_callback(struct mbox_client *client, void *data)
 		dev_info(dev, "received echo reply from %s\n", name);
 		break;
 	case RP_MBOX_SUSPEND_ACK:
-		/* Fall through */
 	case RP_MBOX_SUSPEND_CANCEL:
 		oproc->suspend_acked = msg == RP_MBOX_SUSPEND_ACK;
 		complete(&oproc->pm_comp);
diff --git a/drivers/reset/reset-imx7.c b/drivers/reset/reset-imx7.c
index d170fe6632106..e8aa8691deb2d 100644
--- a/drivers/reset/reset-imx7.c
+++ b/drivers/reset/reset-imx7.c
@@ -222,7 +222,7 @@ static int imx8mq_reset_set(struct reset_controller_dev *rcdev,
 
 	switch (id) {
 	case IMX8MQ_RESET_PCIEPHY:
-	case IMX8MQ_RESET_PCIEPHY2: /* fallthrough */
+	case IMX8MQ_RESET_PCIEPHY2:
 		/*
 		 * wait for more than 10us to release phy g_rst and
 		 * btnrst
@@ -232,12 +232,12 @@ static int imx8mq_reset_set(struct reset_controller_dev *rcdev,
 		break;
 
 	case IMX8MQ_RESET_PCIE_CTRL_APPS_EN:
-	case IMX8MQ_RESET_PCIE2_CTRL_APPS_EN:	/* fallthrough */
-	case IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N:	/* fallthrough */
-	case IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N:	/* fallthrough */
-	case IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N:	/* fallthrough */
-	case IMX8MQ_RESET_MIPI_DSI_RESET_N:	/* fallthrough */
-	case IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N:	/* fallthrough */
+	case IMX8MQ_RESET_PCIE2_CTRL_APPS_EN:
+	case IMX8MQ_RESET_MIPI_DSI_PCLK_RESET_N:
+	case IMX8MQ_RESET_MIPI_DSI_ESC_RESET_N:
+	case IMX8MQ_RESET_MIPI_DSI_DPI_RESET_N:
+	case IMX8MQ_RESET_MIPI_DSI_RESET_N:
+	case IMX8MQ_RESET_MIPI_DSI_RESET_BYTE_N:
 		value = assert ? 0 : bit;
 		break;
 	}
diff --git a/drivers/rpmsg/qcom_glink_native.c b/drivers/rpmsg/qcom_glink_native.c
index 1995f5b3ea677..f40312b16da06 100644
--- a/drivers/rpmsg/qcom_glink_native.c
+++ b/drivers/rpmsg/qcom_glink_native.c
@@ -553,7 +553,7 @@ static void qcom_glink_receive_version(struct qcom_glink *glink,
 		break;
 	case GLINK_VERSION_1:
 		glink->features &= features;
-		/* FALLTHROUGH */
+		fallthrough;
 	default:
 		qcom_glink_send_version_ack(glink);
 		break;
@@ -584,7 +584,7 @@ static void qcom_glink_receive_version_ack(struct qcom_glink *glink,
 			break;
 
 		glink->features &= features;
-		/* FALLTHROUGH */
+		fallthrough;
 	default:
 		qcom_glink_send_version(glink);
 		break;
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 9b70b371bd0c3..8a89bc52b0d45 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -740,7 +740,7 @@ static int wdt_ioctl(struct file *file, unsigned int cmd,
 			return -EINVAL;
 		wdt_margin = new_margin;
 		wdt_ping();
-		/* Fall through */
+		fallthrough;
 	case WDIOC_GETTIMEOUT:
 		return put_user(wdt_margin, (int __user *)arg);
 
diff --git a/drivers/rtc/rtc-pcf85063.c b/drivers/rtc/rtc-pcf85063.c
index ca55ba975aeb1..f8b99cb729590 100644
--- a/drivers/rtc/rtc-pcf85063.c
+++ b/drivers/rtc/rtc-pcf85063.c
@@ -353,7 +353,7 @@ static int pcf85063_load_capacitance(struct pcf85063 *pcf85063,
 	default:
 		dev_warn(&pcf85063->rtc->dev, "Unknown quartz-load-femtofarads value: %d. Assuming 7000",
 			 load);
-		/* fall through */
+		fallthrough;
 	case 7000:
 		break;
 	case 12500:
diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index 47e0f411dd5cb..57d351dfe2723 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -108,7 +108,7 @@ static int pcf8523_load_capacitance(struct i2c_client *client)
 	default:
 		dev_warn(&client->dev, "Unknown quartz-load-femtofarads value: %d. Assuming 12500",
 			 load);
-		/* fall through */
+		fallthrough;
 	case 12500:
 		value |= REG_CONTROL1_CAP_SEL;
 		break;
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index c9bc3d4a1e66c..0a969af80af7c 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -331,7 +331,7 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
 	default:
 		dev_warn(&pdev->dev,
 			 "invalid crystal-freq specified in device-tree. Assuming no crystal\n");
-		/* fall-through */
+		fallthrough;
 	case 0:
 		/* keep XTAL on in low-power mode */
 		pers0_set = STMP3XXX_RTC_PERSISTENT0_XTAL24MHZ_PWRUP;
diff --git a/drivers/s390/net/ctcm_fsms.c b/drivers/s390/net/ctcm_fsms.c
index 3ce99e4db44d5..661d2a49bce96 100644
--- a/drivers/s390/net/ctcm_fsms.c
+++ b/drivers/s390/net/ctcm_fsms.c
@@ -1695,7 +1695,7 @@ static void ctcmpc_chx_attnbusy(fsm_instance *fsm, int event, void *arg)
 			grp->changed_side = 2;
 			break;
 		}
-		/* Else, fall through */
+		fallthrough;
 	case MPCG_STATE_XID0IOWAIX:
 	case MPCG_STATE_XID7INITW:
 	case MPCG_STATE_XID7INITX:
diff --git a/drivers/s390/net/ctcm_mpc.c b/drivers/s390/net/ctcm_mpc.c
index ab316baa82843..85a1a4533cbeb 100644
--- a/drivers/s390/net/ctcm_mpc.c
+++ b/drivers/s390/net/ctcm_mpc.c
@@ -357,7 +357,7 @@ int ctc_mpc_alloc_channel(int port_num, void (*callback)(int, int))
 		/*fsm_newstate(grp->fsm, MPCG_STATE_XID2INITW);*/
 		if (callback)
 			grp->send_qllc_disc = 1;
-		/* Else, fall through */
+		fallthrough;
 	case MPCG_STATE_XID0IOWAIT:
 		fsm_deltimer(&grp->timer);
 		grp->outstanding_xid2 = 0;
@@ -1470,7 +1470,7 @@ static void mpc_action_timeout(fsm_instance *fi, int event, void *arg)
 		if ((fsm_getstate(rch->fsm) == CH_XID0_PENDING) &&
 		   (fsm_getstate(wch->fsm) == CH_XID0_PENDING))
 			break;
-		/* Else, fall through */
+		fallthrough;
 	default:
 		fsm_event(grp->fsm, MPCG_EVENT_INOP, dev);
 	}
@@ -2089,7 +2089,7 @@ static int mpc_send_qllc_discontact(struct net_device *dev)
 			grp->estconnfunc = NULL;
 			break;
 		}
-		/* Else, fall through */
+		fallthrough;
 	case MPCG_STATE_FLOWC:
 	case MPCG_STATE_READY:
 		grp->send_qllc_disc = 2;
diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c
index bba1b54b8aa39..6a73982514237 100644
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -1071,7 +1071,7 @@ static void qeth_issue_next_read_cb(struct qeth_card *card,
 		break;
 	case -EIO:
 		qeth_schedule_recovery(card);
-		/* fall through */
+		fallthrough;
 	default:
 		qeth_clear_ipacmd_list(card);
 		goto err_idx;
@@ -2886,7 +2886,7 @@ void qeth_print_status_message(struct qeth_card *card)
 				card->info.mcl_level[3]);
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case QETH_CARD_TYPE_IQD:
 		if (IS_VM_NIC(card) || (card->info.mcl_level[0] & 0x80)) {
 			card->info.mcl_level[0] = (char) _ebcasc[(__u8)
diff --git a/drivers/s390/net/qeth_ethtool.c b/drivers/s390/net/qeth_ethtool.c
index ebdc032106089..f870c5322bfe7 100644
--- a/drivers/s390/net/qeth_ethtool.c
+++ b/drivers/s390/net/qeth_ethtool.c
@@ -356,7 +356,7 @@ static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
 						     10000baseT_Full);
 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
 						     10000baseT_Full);
-		/* fall through */
+		fallthrough;
 	case SPEED_1000:
 		ethtool_link_ksettings_add_link_mode(cmd, supported,
 						     1000baseT_Full);
@@ -366,7 +366,7 @@ static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
 						     1000baseT_Half);
 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
 						     1000baseT_Half);
-		/* fall through */
+		fallthrough;
 	case SPEED_100:
 		ethtool_link_ksettings_add_link_mode(cmd, supported,
 						     100baseT_Full);
@@ -376,7 +376,7 @@ static void qeth_set_cmd_adv_sup(struct ethtool_link_ksettings *cmd,
 						     100baseT_Half);
 		ethtool_link_ksettings_add_link_mode(cmd, advertising,
 						     100baseT_Half);
-		/* fall through */
+		fallthrough;
 	case SPEED_10:
 		ethtool_link_ksettings_add_link_mode(cmd, supported,
 						     10baseT_Full);
diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index 8b342a88ff5cb..3a94f6cad1676 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -488,7 +488,7 @@ static void qeth_l2_rx_mode_work(struct work_struct *work)
 				kfree(mac);
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		default:
 			/* for next call to set_rx_mode(): */
 			mac->disp_flag = QETH_DISP_ADDR_DELETE;
diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c
index fe44b0249e34a..4d461960370d9 100644
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -1235,7 +1235,7 @@ static void qeth_l3_rx_mode_work(struct work_struct *work)
 					break;
 				}
 				addr->ref_counter = 1;
-				/* fall through */
+				fallthrough;
 			default:
 				/* for next call to set_rx_mode(): */
 				addr->disp_flag = QETH_DISP_ADDR_DELETE;
diff --git a/drivers/scsi/53c700.c b/drivers/scsi/53c700.c
index 461b3babb601e..84b57a8f86bfa 100644
--- a/drivers/scsi/53c700.c
+++ b/drivers/scsi/53c700.c
@@ -1832,7 +1832,7 @@ NCR_700_queuecommand_lck(struct scsi_cmnd *SCp, void (*done)(struct scsi_cmnd *)
 	case REQUEST_SENSE:
 		/* clear the internal sense magic */
 		SCp->cmnd[6] = 0;
-		/* fall through */
+		fallthrough;
 	default:
 		/* OK, get it from the command */
 		switch(SCp->sc_data_direction) {
diff --git a/drivers/scsi/BusLogic.c b/drivers/scsi/BusLogic.c
index bb49d83cadc78..ccb061ab0a0ad 100644
--- a/drivers/scsi/BusLogic.c
+++ b/drivers/scsi/BusLogic.c
@@ -2635,7 +2635,7 @@ static int blogic_resultcode(struct blogic_adapter *adapter,
 	case BLOGIC_BAD_CMD_PARAM:
 		blogic_warn("BusLogic Driver Protocol Error 0x%02X\n",
 				adapter, adapter_status);
-		/* fall through */
+		fallthrough;
 	case BLOGIC_DATA_UNDERRUN:
 	case BLOGIC_DATA_OVERRUN:
 	case BLOGIC_NOEXPECT_BUSFREE:
diff --git a/drivers/scsi/FlashPoint.c b/drivers/scsi/FlashPoint.c
index 0f17bd51088ac..24ace18240480 100644
--- a/drivers/scsi/FlashPoint.c
+++ b/drivers/scsi/FlashPoint.c
@@ -1034,11 +1034,14 @@ static int FlashPoint_ProbeHostAdapter(struct sccb_mgr_info *pCardInfo)
 			temp6 >>= 1;
 			switch (temp & 0x3) {
 			case AUTO_RATE_20:	/* Synchronous, 20 mega-transfers/second */
-				temp6 |= 0x8000;	/* Fall through */
+				temp6 |= 0x8000;
+				fallthrough;
 			case AUTO_RATE_10:	/* Synchronous, 10 mega-transfers/second */
-				temp5 |= 0x8000;	/* Fall through */
+				temp5 |= 0x8000;
+				fallthrough;
 			case AUTO_RATE_05:	/* Synchronous, 5 mega-transfers/second */
-				temp2 |= 0x8000;	/* Fall through */
+				temp2 |= 0x8000;
+				fallthrough;
 			case AUTO_RATE_00:	/* Asynchronous */
 				break;
 			}
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c
index f2f7e6e76c07a..d654a6cc4162f 100644
--- a/drivers/scsi/NCR5380.c
+++ b/drivers/scsi/NCR5380.c
@@ -1943,7 +1943,7 @@ static void NCR5380_information_transfer(struct Scsi_Host *instance)
 						return;
 
 					/* Reject message */
-					/* Fall through */
+					fallthrough;
 				default:
 					/*
 					 * If we get something weird that we aren't expecting,
diff --git a/drivers/scsi/aacraid/aachba.c b/drivers/scsi/aacraid/aachba.c
index 769af4ca9ca97..fd6ae5c380861 100644
--- a/drivers/scsi/aacraid/aachba.c
+++ b/drivers/scsi/aacraid/aachba.c
@@ -2809,7 +2809,7 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
 					    !(dev->raw_io_64) ||
 					    ((scsicmd->cmnd[1] & 0x1f) != SAI_READ_CAPACITY_16))
 						break;
-					/* fall through */
+					fallthrough;
 				case INQUIRY:
 				case READ_CAPACITY:
 				case TEST_UNIT_READY:
@@ -2884,7 +2884,7 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
 		/* Issue FIB to tell Firmware to flush it's cache */
 		if ((aac_cache & 6) != 2)
 			return aac_synchronize(scsicmd);
-		/* fall through */
+		fallthrough;
 	case INQUIRY:
 	{
 		struct inquiry_data inq_data;
@@ -3240,7 +3240,7 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
 				     SCSI_SENSE_BUFFERSIZE));
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case RESERVE:
 	case RELEASE:
 	case REZERO_UNIT:
@@ -3253,7 +3253,7 @@ int aac_scsi_cmd(struct scsi_cmnd * scsicmd)
 	case START_STOP:
 		return aac_start_stop(scsicmd);
 
-	/* FALLTHRU */
+		fallthrough;
 	default:
 	/*
 	 *	Unhandled commands
diff --git a/drivers/scsi/aacraid/commsup.c b/drivers/scsi/aacraid/commsup.c
index adbdc3b7c7a70..383e74fea6edf 100644
--- a/drivers/scsi/aacraid/commsup.c
+++ b/drivers/scsi/aacraid/commsup.c
@@ -1431,7 +1431,7 @@ static void aac_handle_aif(struct aac_dev * dev, struct fib * fibptr)
 						"enclosure services event");
 				scsi_device_set_state(device, SDEV_RUNNING);
 			}
-			/* FALLTHRU */
+			fallthrough;
 		case CHANGE:
 			if ((channel == CONTAINER_CHANNEL)
 			 && (!dev->fsa_dev[container].valid)) {
diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 8588da0a06555..a3aee146537bc 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -765,7 +765,7 @@ static int aac_eh_abort(struct scsi_cmnd* cmd)
 			    !(aac->raw_io_64) ||
 			    ((cmd->cmnd[1] & 0x1f) != SAI_READ_CAPACITY_16))
 				break;
-			/* fall through */
+			fallthrough;
 		case INQUIRY:
 		case READ_CAPACITY:
 			/*
diff --git a/drivers/scsi/aic7xxx/aic79xx_core.c b/drivers/scsi/aic7xxx/aic79xx_core.c
index c912d29b8bdf7..1c617c0d5899f 100644
--- a/drivers/scsi/aic7xxx/aic79xx_core.c
+++ b/drivers/scsi/aic7xxx/aic79xx_core.c
@@ -2274,7 +2274,7 @@ ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat)
 			switch (scb->hscb->task_management) {
 			case SIU_TASKMGMT_ABORT_TASK:
 				tag = SCB_GET_TAG(scb);
-				/* fall through */
+				fallthrough;
 			case SIU_TASKMGMT_ABORT_TASK_SET:
 			case SIU_TASKMGMT_CLEAR_TASK_SET:
 				lun = scb->hscb->lun;
@@ -2285,7 +2285,7 @@ ahd_handle_seqint(struct ahd_softc *ahd, u_int intstat)
 				break;
 			case SIU_TASKMGMT_LUN_RESET:
 				lun = scb->hscb->lun;
-				/* fall through */
+				fallthrough;
 			case SIU_TASKMGMT_TARGET_RESET:
 			{
 				struct ahd_devinfo devinfo;
@@ -3791,7 +3791,7 @@ ahd_validate_width(struct ahd_softc *ahd, struct ahd_initiator_tinfo *tinfo,
 			*bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 			break;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case MSG_EXT_WDTR_BUS_8_BIT:
 		*bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 		break;
@@ -5104,7 +5104,7 @@ ahd_parse_msg(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
 		break;
 	case MSG_MESSAGE_REJECT:
 		response = ahd_handle_msg_reject(ahd, devinfo);
-		/* FALLTHROUGH */
+		fallthrough;
 	case MSG_NOOP:
 		done = MSGLOOP_MSGCOMPLETE;
 		break;
@@ -5454,7 +5454,7 @@ ahd_parse_msg(struct ahd_softc *ahd, struct ahd_devinfo *devinfo)
 			       ahd_name(ahd), ahd_inb(ahd, SCSISIGI));
 #endif
 		ahd->msg_flags |= MSG_FLAG_EXPECT_QASREJ_BUSFREE;
-		/* FALLTHROUGH */
+		fallthrough;
 	case MSG_TERM_IO_PROC:
 	default:
 		reject = TRUE;
@@ -6117,17 +6117,17 @@ ahd_free(struct ahd_softc *ahd)
 	default:
 	case 5:
 		ahd_shutdown(ahd);
-		/* FALLTHROUGH */
+		fallthrough;
 	case 4:
 		ahd_dmamap_unload(ahd, ahd->shared_data_dmat,
 				  ahd->shared_data_map.dmamap);
-		/* FALLTHROUGH */
+		fallthrough;
 	case 3:
 		ahd_dmamem_free(ahd, ahd->shared_data_dmat, ahd->qoutfifo,
 				ahd->shared_data_map.dmamap);
 		ahd_dmamap_destroy(ahd, ahd->shared_data_dmat,
 				   ahd->shared_data_map.dmamap);
-		/* FALLTHROUGH */
+		fallthrough;
 	case 2:
 		ahd_dma_tag_destroy(ahd, ahd->shared_data_dmat);
 	case 1:
@@ -6513,7 +6513,7 @@ ahd_fini_scbdata(struct ahd_softc *ahd)
 		}
 		ahd_dma_tag_destroy(ahd, scb_data->sense_dmat);
 	}
-		/* fall through */
+		fallthrough;
 	case 6:
 	{
 		struct map_node *sg_map;
@@ -6528,7 +6528,7 @@ ahd_fini_scbdata(struct ahd_softc *ahd)
 		}
 		ahd_dma_tag_destroy(ahd, scb_data->sg_dmat);
 	}
-		/* fall through */
+		fallthrough;
 	case 5:
 	{
 		struct map_node *hscb_map;
@@ -7171,7 +7171,7 @@ ahd_init(struct ahd_softc *ahd)
 		case FLX_CSTAT_OVER:
 		case FLX_CSTAT_UNDER:
 			warn_user++;
-			/* fall through */
+			fallthrough;
 		case FLX_CSTAT_INVALID:
 		case FLX_CSTAT_OKAY:
 			if (warn_user == 0 && bootverbose == 0)
@@ -8175,12 +8175,12 @@ ahd_search_qinfifo(struct ahd_softc *ahd, int target, char channel,
 				if ((scb->flags & SCB_ACTIVE) == 0)
 					printk("Inactive SCB in qinfifo\n");
 				ahd_done_with_status(ahd, scb, status);
-				/* FALLTHROUGH */
+				fallthrough;
 			case SEARCH_REMOVE:
 				break;
 			case SEARCH_PRINT:
 				printk(" 0x%x", ahd->qinfifo[qinpos]);
-				/* FALLTHROUGH */
+				fallthrough;
 			case SEARCH_COUNT:
 				ahd_qinfifo_requeue(ahd, prev_scb, scb);
 				prev_scb = scb;
@@ -8271,7 +8271,7 @@ ahd_search_qinfifo(struct ahd_softc *ahd, int target, char channel,
 				if ((mk_msg_scb->flags & SCB_ACTIVE) == 0)
 					printk("Inactive SCB pending MK_MSG\n");
 				ahd_done_with_status(ahd, mk_msg_scb, status);
-				/* FALLTHROUGH */
+				fallthrough;
 			case SEARCH_REMOVE:
 			{
 				u_int tail_offset;
@@ -8295,7 +8295,7 @@ ahd_search_qinfifo(struct ahd_softc *ahd, int target, char channel,
 			}
 			case SEARCH_PRINT:
 				printk(" 0x%x", SCB_GET_TAG(scb));
-				/* FALLTHROUGH */
+				fallthrough;
 			case SEARCH_COUNT:
 				break;
 			}
@@ -8376,7 +8376,7 @@ ahd_search_scb_list(struct ahd_softc *ahd, int target, char channel,
 			if ((scb->flags & SCB_ACTIVE) == 0)
 				printk("Inactive SCB in Waiting List\n");
 			ahd_done_with_status(ahd, scb, status);
-			/* fall through */
+			fallthrough;
 		case SEARCH_REMOVE:
 			ahd_rem_wscb(ahd, scbid, prev, next, tid);
 			*list_tail = prev;
@@ -8385,7 +8385,7 @@ ahd_search_scb_list(struct ahd_softc *ahd, int target, char channel,
 			break;
 		case SEARCH_PRINT:
 			printk("0x%x ", scbid);
-			/* fall through */
+			fallthrough;
 		case SEARCH_COUNT:
 			prev = scbid;
 			break;
@@ -9023,7 +9023,7 @@ ahd_handle_scsi_status(struct ahd_softc *ahd, struct scb *scb)
 	case SCSI_STATUS_OK:
 		printk("%s: Interrupted for status of 0???\n",
 		       ahd_name(ahd));
-		/* FALLTHROUGH */
+		fallthrough;
 	default:
 		ahd_done(ahd, scb);
 		break;
@@ -9512,7 +9512,7 @@ ahd_download_instr(struct ahd_softc *ahd, u_int instrptr, uint8_t *dconsts)
 		fmt3_ins = &instr.format3;
 		fmt3_ins->address = ahd_resolve_seqaddr(ahd, fmt3_ins->address);
 	}
-		/* fall through */
+		fallthrough;
 	case AIC_OP_OR:
 	case AIC_OP_AND:
 	case AIC_OP_XOR:
@@ -9523,7 +9523,7 @@ ahd_download_instr(struct ahd_softc *ahd, u_int instrptr, uint8_t *dconsts)
 			fmt1_ins->immediate = dconsts[fmt1_ins->immediate];
 		}
 		fmt1_ins->parity = 0;
-		/* fall through */
+		fallthrough;
 	case AIC_OP_ROL:
 	{
 		int i, count;
diff --git a/drivers/scsi/aic7xxx/aic79xx_osm.c b/drivers/scsi/aic7xxx/aic79xx_osm.c
index d019e3f2bb9b3..7c321303969eb 100644
--- a/drivers/scsi/aic7xxx/aic79xx_osm.c
+++ b/drivers/scsi/aic7xxx/aic79xx_osm.c
@@ -2035,7 +2035,7 @@ ahd_linux_queue_cmd_complete(struct ahd_softc *ahd, struct scsi_cmnd *cmd)
 		break;
 	case CAM_AUTOSENSE_FAIL:
 		new_status = DID_ERROR;
-		/* Fallthrough */
+		fallthrough;
 	case CAM_SCSI_STATUS_ERROR:
 		scsi_status = ahd_cmd_get_scsi_status(cmd);
 
diff --git a/drivers/scsi/aic7xxx/aic7xxx_core.c b/drivers/scsi/aic7xxx/aic7xxx_core.c
index 3d4df906fa4f4..2231c4afa531b 100644
--- a/drivers/scsi/aic7xxx/aic7xxx_core.c
+++ b/drivers/scsi/aic7xxx/aic7xxx_core.c
@@ -2404,7 +2404,7 @@ ahc_validate_width(struct ahc_softc *ahc, struct ahc_initiator_tinfo *tinfo,
 			*bus_width = MSG_EXT_WDTR_BUS_16_BIT;
 			break;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case MSG_EXT_WDTR_BUS_8_BIT:
 		*bus_width = MSG_EXT_WDTR_BUS_8_BIT;
 		break;
@@ -3599,7 +3599,7 @@ ahc_parse_msg(struct ahc_softc *ahc, struct ahc_devinfo *devinfo)
 		break;
 	case MSG_MESSAGE_REJECT:
 		response = ahc_handle_msg_reject(ahc, devinfo);
-		/* FALLTHROUGH */
+		fallthrough;
 	case MSG_NOOP:
 		done = MSGLOOP_MSGCOMPLETE;
 		break;
@@ -4465,17 +4465,17 @@ ahc_free(struct ahc_softc *ahc)
 	default:
 	case 5:
 		ahc_shutdown(ahc);
-		/* FALLTHROUGH */
+		fallthrough;
 	case 4:
 		ahc_dmamap_unload(ahc, ahc->shared_data_dmat,
 				  ahc->shared_data_dmamap);
-		/* FALLTHROUGH */
+		fallthrough;
 	case 3:
 		ahc_dmamem_free(ahc, ahc->shared_data_dmat, ahc->qoutfifo,
 				ahc->shared_data_dmamap);
 		ahc_dmamap_destroy(ahc, ahc->shared_data_dmat,
 				   ahc->shared_data_dmamap);
-		/* FALLTHROUGH */
+		fallthrough;
 	case 2:
 		ahc_dma_tag_destroy(ahc, ahc->shared_data_dmat);
 	case 1:
@@ -4893,30 +4893,30 @@ ahc_fini_scbdata(struct ahc_softc *ahc)
 		}
 		ahc_dma_tag_destroy(ahc, scb_data->sg_dmat);
 	}
-		/* fall through */
+		fallthrough;
 	case 6:
 		ahc_dmamap_unload(ahc, scb_data->sense_dmat,
 				  scb_data->sense_dmamap);
-		/* fall through */
+		fallthrough;
 	case 5:
 		ahc_dmamem_free(ahc, scb_data->sense_dmat, scb_data->sense,
 				scb_data->sense_dmamap);
 		ahc_dmamap_destroy(ahc, scb_data->sense_dmat,
 				   scb_data->sense_dmamap);
-		/* fall through */
+		fallthrough;
 	case 4:
 		ahc_dma_tag_destroy(ahc, scb_data->sense_dmat);
-		/* fall through */
+		fallthrough;
 	case 3:
 		ahc_dmamap_unload(ahc, scb_data->hscb_dmat,
 				  scb_data->hscb_dmamap);
-		/* fall through */
+		fallthrough;
 	case 2:
 		ahc_dmamem_free(ahc, scb_data->hscb_dmat, scb_data->hscbs,
 				scb_data->hscb_dmamap);
 		ahc_dmamap_destroy(ahc, scb_data->hscb_dmat,
 				   scb_data->hscb_dmamap);
-		/* fall through */
+		fallthrough;
 	case 1:
 		ahc_dma_tag_destroy(ahc, scb_data->hscb_dmat);
 		break;
@@ -5981,7 +5981,7 @@ ahc_search_qinfifo(struct ahc_softc *ahc, int target, char channel,
 					printk("Inactive SCB in Waiting List\n");
 				ahc_done(ahc, scb);
 			}
-				/* fall through */
+				fallthrough;
 			case SEARCH_REMOVE:
 				next = ahc_rem_wscb(ahc, next, prev);
 				break;
@@ -6987,7 +6987,7 @@ ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
 		address -= address_offset;
 		fmt3_ins->address = address;
 	}
-		/* fall through */
+		fallthrough;
 	case AIC_OP_OR:
 	case AIC_OP_AND:
 	case AIC_OP_XOR:
@@ -7013,7 +7013,7 @@ ahc_download_instr(struct ahc_softc *ahc, u_int instrptr, uint8_t *dconsts)
 			fmt1_ins->opcode = AIC_OP_AND;
 			fmt1_ins->immediate = 0xff;
 		}
-		/* fall through */
+		fallthrough;
 	case AIC_OP_ROL:
 		if ((ahc->features & AHC_ULTRA2) != 0) {
 			int i, count;
diff --git a/drivers/scsi/aic94xx/aic94xx_scb.c b/drivers/scsi/aic94xx/aic94xx_scb.c
index c264b4b56970b..e2d880a5f3915 100644
--- a/drivers/scsi/aic94xx/aic94xx_scb.c
+++ b/drivers/scsi/aic94xx/aic94xx_scb.c
@@ -706,11 +706,11 @@ static void set_speed_mask(u8 *speed_mask, struct asd_phy_desc *pd)
 	switch (pd->max_sas_lrate) {
 	case SAS_LINK_RATE_6_0_GBPS:
 		*speed_mask &= ~SAS_SPEED_60_DIS;
-		/* fall through*/
+		fallthrough;
 	default:
 	case SAS_LINK_RATE_3_0_GBPS:
 		*speed_mask &= ~SAS_SPEED_30_DIS;
-		/* fall through*/
+		fallthrough;
 	case SAS_LINK_RATE_1_5_GBPS:
 		*speed_mask &= ~SAS_SPEED_15_DIS;
 	}
@@ -718,7 +718,7 @@ static void set_speed_mask(u8 *speed_mask, struct asd_phy_desc *pd)
 	switch (pd->min_sas_lrate) {
 	case SAS_LINK_RATE_6_0_GBPS:
 		*speed_mask |= SAS_SPEED_30_DIS;
-		/* fall through*/
+		fallthrough;
 	case SAS_LINK_RATE_3_0_GBPS:
 		*speed_mask |= SAS_SPEED_15_DIS;
 	default:
@@ -730,7 +730,7 @@ static void set_speed_mask(u8 *speed_mask, struct asd_phy_desc *pd)
 	switch (pd->max_sata_lrate) {
 	case SAS_LINK_RATE_3_0_GBPS:
 		*speed_mask &= ~SATA_SPEED_30_DIS;
-		/* fall through*/
+		fallthrough;
 	default:
 	case SAS_LINK_RATE_1_5_GBPS:
 		*speed_mask &= ~SATA_SPEED_15_DIS;
@@ -789,7 +789,7 @@ void asd_build_control_phy(struct asd_ascb *ascb, int phy_id, u8 subfunc)
 
 		/* link reset retries, this should be nominal */
 		control_phy->link_reset_retries = 10;
-		/* fall through */
+		fallthrough;
 
 	case RELEASE_SPINUP_HOLD: /* 0x02 */
 		/* decide the func_mask */
diff --git a/drivers/scsi/aic94xx/aic94xx_tmf.c b/drivers/scsi/aic94xx/aic94xx_tmf.c
index 1fcee65193a33..0eb6e206a2b48 100644
--- a/drivers/scsi/aic94xx/aic94xx_tmf.c
+++ b/drivers/scsi/aic94xx/aic94xx_tmf.c
@@ -490,7 +490,7 @@ int asd_abort_task(struct sas_task *task)
 		switch (tcs.dl_opcode) {
 		default:
 			res = asd_clear_nexus(task);
-			/* fallthrough */
+			fallthrough;
 		case TC_NO_ERROR:
 			break;
 			/* The task hasn't been sent to the device xor
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
index fa562a085600d..ec895d0319f02 100644
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -4470,7 +4470,7 @@ static const char *arcmsr_info(struct Scsi_Host *host)
 	case PCI_DEVICE_ID_ARECA_1202:
 	case PCI_DEVICE_ID_ARECA_1210:
 		raid6 = 0;
-		/*FALLTHRU*/
+		fallthrough;
 	case PCI_DEVICE_ID_ARECA_1120:
 	case PCI_DEVICE_ID_ARECA_1130:
 	case PCI_DEVICE_ID_ARECA_1160:
diff --git a/drivers/scsi/arm/fas216.c b/drivers/scsi/arm/fas216.c
index 6c68c23036383..2e687ce607538 100644
--- a/drivers/scsi/arm/fas216.c
+++ b/drivers/scsi/arm/fas216.c
@@ -603,7 +603,7 @@ static void fas216_handlesync(FAS216_Info *info, char *msg)
 		msgqueue_flush(&info->scsi.msgs);
 		msgqueue_addmsg(&info->scsi.msgs, 1, MESSAGE_REJECT);
 		info->scsi.phase = PHASE_MSGOUT_EXPECT;
-		/* fall through */
+		fallthrough;
 
 	case async:
 		dev->period = info->ifcfg.asyncperiod / 4;
@@ -916,7 +916,7 @@ static void fas216_disconnect_intr(FAS216_Info *info)
 			fas216_done(info, DID_ABORT);
 			break;
 		}
-		/* else, fall through */
+		fallthrough;
 
 	default:				/* huh?					*/
 		printk(KERN_ERR "scsi%d.%c: unexpected disconnect in phase %s\n",
@@ -1413,7 +1413,7 @@ static void fas216_busservice_intr(FAS216_Info *info, unsigned int stat, unsigne
 	case STATE(STAT_STATUS, PHASE_DATAOUT): /* Data Out     -> Status       */
 	case STATE(STAT_STATUS, PHASE_DATAIN):  /* Data In      -> Status       */
 		fas216_stoptransfer(info);
-		/* fall through */
+		fallthrough;
 
 	case STATE(STAT_STATUS, PHASE_SELSTEPS):/* Sel w/ steps -> Status       */
 	case STATE(STAT_STATUS, PHASE_MSGOUT):  /* Message Out  -> Status       */
@@ -1426,7 +1426,7 @@ static void fas216_busservice_intr(FAS216_Info *info, unsigned int stat, unsigne
 	case STATE(STAT_MESGIN, PHASE_DATAOUT): /* Data Out     -> Message In   */
 	case STATE(STAT_MESGIN, PHASE_DATAIN):  /* Data In      -> Message In   */
 		fas216_stoptransfer(info);
-		/* fall through */
+		fallthrough;
 
 	case STATE(STAT_MESGIN, PHASE_COMMAND):	/* Command	-> Message In	*/
 	case STATE(STAT_MESGIN, PHASE_SELSTEPS):/* Sel w/ steps -> Message In   */
@@ -1581,7 +1581,7 @@ static void fas216_funcdone_intr(FAS216_Info *info, unsigned int stat, unsigned
 			fas216_message(info);
 			break;
 		}
-		/* else, fall through */
+		fallthrough;
 
 	default:
 		fas216_log(info, 0, "internal phase %s for function done?"
@@ -1964,7 +1964,7 @@ static void fas216_kick(FAS216_Info *info)
 	switch (where_from) {
 	case TYPE_QUEUE:
 		fas216_allocate_tag(info, SCpnt);
-		/* fall through */
+		fallthrough;
 	case TYPE_OTHER:
 		fas216_start_command(info, SCpnt);
 		break;
diff --git a/drivers/scsi/be2iscsi/be_iscsi.c b/drivers/scsi/be2iscsi/be_iscsi.c
index 93da6344424dd..a13c203ef7a9a 100644
--- a/drivers/scsi/be2iscsi/be_iscsi.c
+++ b/drivers/scsi/be2iscsi/be_iscsi.c
@@ -677,7 +677,7 @@ int beiscsi_set_param(struct iscsi_cls_conn *cls_conn,
 	case ISCSI_PARAM_MAX_XMIT_DLENGTH:
 		if (conn->max_xmit_dlength > 65536)
 			conn->max_xmit_dlength = 65536;
-		/* fall through */
+		fallthrough;
 	default:
 		return 0;
 	}
diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c
index 8dc2e0824ad78..5c3513a4b450e 100644
--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -1532,7 +1532,7 @@ beiscsi_hdl_get_handle(struct beiscsi_conn *beiscsi_conn,
 		break;
 	case UNSOL_DATA_DIGEST_ERROR_NOTIFY:
 		error = 1;
-		/* fall through */
+		fallthrough;
 	case UNSOL_DATA_NOTIFY:
 		pasync_handle = pasync_ctx->async_entry[ci].data;
 		break;
diff --git a/drivers/scsi/bfa/bfa_fcpim.c b/drivers/scsi/bfa/bfa_fcpim.c
index 29f99561dfc3a..38d1c453074dc 100644
--- a/drivers/scsi/bfa/bfa_fcpim.c
+++ b/drivers/scsi/bfa/bfa_fcpim.c
@@ -2572,7 +2572,7 @@ bfa_ioim_send_ioreq(struct bfa_ioim_s *ioim)
 	case FCP_IODIR_RW:
 		bfa_stats(itnim, input_reqs);
 		bfa_stats(itnim, output_reqs);
-		/* fall through */
+		fallthrough;
 	default:
 		bfi_h2i_set(m->mh, BFI_MC_IOIM_IO, 0, bfa_fn_lpu(ioim->bfa));
 	}
@@ -2807,7 +2807,7 @@ bfa_ioim_isr(struct bfa_s *bfa, struct bfi_msg_s *m)
 
 	case BFI_IOIM_STS_TIMEDOUT:
 		bfa_stats(ioim->itnim, iocomp_timedout);
-		/* fall through */
+		fallthrough;
 	case BFI_IOIM_STS_ABORTED:
 		rsp->io_status = BFI_IOIM_STS_ABORTED;
 		bfa_stats(ioim->itnim, iocomp_aborted);
@@ -3203,7 +3203,7 @@ bfa_tskim_sm_cleanup_qfull(struct bfa_tskim_s *tskim,
 	switch (event) {
 	case BFA_TSKIM_SM_DONE:
 		bfa_reqq_wcancel(&tskim->reqq_wait);
-		/* fall through */
+		fallthrough;
 	case BFA_TSKIM_SM_QRESUME:
 		bfa_sm_set_state(tskim, bfa_tskim_sm_cleanup);
 		bfa_tskim_send_abort(tskim);
diff --git a/drivers/scsi/bfa/bfa_fcs_lport.c b/drivers/scsi/bfa/bfa_fcs_lport.c
index 297a77f5806cc..3486e402bfc1f 100644
--- a/drivers/scsi/bfa/bfa_fcs_lport.c
+++ b/drivers/scsi/bfa/bfa_fcs_lport.c
@@ -6422,7 +6422,7 @@ bfa_fcs_vport_sm_logo_for_stop(struct bfa_fcs_vport_s *vport,
 	switch (event) {
 	case BFA_FCS_VPORT_SM_OFFLINE:
 		bfa_sm_send_event(vport->lps, BFA_LPS_SM_OFFLINE);
-		/* fall through */
+		fallthrough;
 
 	case BFA_FCS_VPORT_SM_RSP_OK:
 	case BFA_FCS_VPORT_SM_RSP_ERROR:
@@ -6448,7 +6448,7 @@ bfa_fcs_vport_sm_logo(struct bfa_fcs_vport_s *vport,
 	switch (event) {
 	case BFA_FCS_VPORT_SM_OFFLINE:
 		bfa_sm_send_event(vport->lps, BFA_LPS_SM_OFFLINE);
-		/* fall through */
+		fallthrough;
 
 	case BFA_FCS_VPORT_SM_RSP_OK:
 	case BFA_FCS_VPORT_SM_RSP_ERROR:
diff --git a/drivers/scsi/bfa/bfa_fcs_rport.c b/drivers/scsi/bfa/bfa_fcs_rport.c
index 143c35bd668c2..c21aa37b8adbe 100644
--- a/drivers/scsi/bfa/bfa_fcs_rport.c
+++ b/drivers/scsi/bfa/bfa_fcs_rport.c
@@ -419,13 +419,13 @@ bfa_fcs_rport_sm_plogi(struct bfa_fcs_rport_s *rport, enum rport_event event)
 
 	case RPSM_EVENT_LOGO_RCVD:
 		bfa_fcs_rport_send_logo_acc(rport);
-		/* fall through */
+		fallthrough;
 	case RPSM_EVENT_PRLO_RCVD:
 		if (rport->prlo == BFA_TRUE)
 			bfa_fcs_rport_send_prlo_acc(rport);
 
 		bfa_fcxp_discard(rport->fcxp);
-		/* fall through */
+		fallthrough;
 	case RPSM_EVENT_FAILED:
 		if (rport->plogi_retries < BFA_FCS_RPORT_MAX_RETRIES) {
 			rport->plogi_retries++;
@@ -856,7 +856,7 @@ bfa_fcs_rport_sm_adisc_online(struct bfa_fcs_rport_s *rport,
 		 * At least go offline when a PLOGI is received.
 		 */
 		bfa_fcxp_discard(rport->fcxp);
-		/* fall through */
+		fallthrough;
 
 	case RPSM_EVENT_FAILED:
 	case RPSM_EVENT_ADDRESS_CHANGE:
@@ -1042,7 +1042,7 @@ bfa_fcs_rport_sm_fc4_logosend(struct bfa_fcs_rport_s *rport,
 
 	case RPSM_EVENT_LOGO_RCVD:
 		bfa_fcs_rport_send_logo_acc(rport);
-		/* fall through */
+		fallthrough;
 	case RPSM_EVENT_PRLO_RCVD:
 		if (rport->prlo == BFA_TRUE)
 			bfa_fcs_rport_send_prlo_acc(rport);
@@ -1131,7 +1131,7 @@ bfa_fcs_rport_sm_hcb_offline(struct bfa_fcs_rport_s *rport,
 			bfa_fcs_rport_send_plogiacc(rport, NULL);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 
 	case RPSM_EVENT_ADDRESS_CHANGE:
 		if (!bfa_fcs_lport_is_online(rport->port)) {
@@ -1288,7 +1288,7 @@ bfa_fcs_rport_sm_hcb_logosend(struct bfa_fcs_rport_s *rport,
 
 	case RPSM_EVENT_LOGO_RCVD:
 		bfa_fcs_rport_send_logo_acc(rport);
-		/* fall through */
+		fallthrough;
 	case RPSM_EVENT_PRLO_RCVD:
 		if (rport->prlo == BFA_TRUE)
 			bfa_fcs_rport_send_prlo_acc(rport);
@@ -1332,7 +1332,7 @@ bfa_fcs_rport_sm_logo_sending(struct bfa_fcs_rport_s *rport,
 
 	case RPSM_EVENT_LOGO_RCVD:
 		bfa_fcs_rport_send_logo_acc(rport);
-		/* fall through */
+		fallthrough;
 	case RPSM_EVENT_PRLO_RCVD:
 		if (rport->prlo == BFA_TRUE)
 			bfa_fcs_rport_send_prlo_acc(rport);
diff --git a/drivers/scsi/bfa/bfa_ioc.c b/drivers/scsi/bfa/bfa_ioc.c
index dd5821dfcac2d..325ad8a592bbc 100644
--- a/drivers/scsi/bfa/bfa_ioc.c
+++ b/drivers/scsi/bfa/bfa_ioc.c
@@ -969,7 +969,7 @@ bfa_iocpf_sm_enabling(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
 
 	case IOCPF_E_INITFAIL:
 		bfa_iocpf_timer_stop(ioc);
-		/* fall through */
+		fallthrough;
 
 	case IOCPF_E_TIMEOUT:
 		writel(1, ioc->ioc_regs.ioc_sem_reg);
@@ -1045,7 +1045,7 @@ bfa_iocpf_sm_disabling(struct bfa_iocpf_s *iocpf, enum iocpf_event event)
 
 	case IOCPF_E_FAIL:
 		bfa_iocpf_timer_stop(ioc);
-		/* fall through */
+		fallthrough;
 
 	case IOCPF_E_TIMEOUT:
 		bfa_ioc_set_cur_ioc_fwstate(ioc, BFI_IOC_FAIL);
@@ -5988,7 +5988,7 @@ bfa_dconf_sm_final_sync(struct bfa_dconf_mod_s *dconf,
 	case BFA_DCONF_SM_IOCDISABLE:
 	case BFA_DCONF_SM_FLASH_COMP:
 		bfa_timer_stop(&dconf->timer);
-		/* fall through */
+		fallthrough;
 	case BFA_DCONF_SM_TIMEOUT:
 		bfa_sm_set_state(dconf, bfa_dconf_sm_uninit);
 		bfa_fsm_send_event(&dconf->bfa->iocfc, IOCFC_E_DCONF_DONE);
diff --git a/drivers/scsi/bfa/bfa_svc.c b/drivers/scsi/bfa/bfa_svc.c
index 1e266c1ef7938..11c0c3e6f014f 100644
--- a/drivers/scsi/bfa/bfa_svc.c
+++ b/drivers/scsi/bfa/bfa_svc.c
@@ -6397,7 +6397,7 @@ bfa_dport_sm_starting(struct bfa_dport_s *dport, enum bfa_dport_sm_event event)
 			dport->test_state = BFA_DPORT_ST_INP;
 			bfa_dport_result_start(dport, BFA_DPORT_OPMODE_MANU);
 		}
-		/* fall thru */
+		fallthrough;
 
 	case BFA_DPORT_SM_REQFAIL:
 		bfa_sm_set_state(dport, bfa_dport_sm_enabled);
diff --git a/drivers/scsi/bnx2fc/bnx2fc_hwi.c b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
index e72d7bb7f4f42..08992095ce7ae 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_hwi.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_hwi.c
@@ -1404,7 +1404,6 @@ void bnx2fc_indicate_kcqe(void *context, struct kcqe *kcq[],
 			break;
 
 		case FCOE_KCQE_OPCODE_FCOE_ERROR:
-			/* fall thru */
 		default:
 			printk(KERN_ERR PFX "unknown opcode 0x%x\n",
 								kcqe->op_code);
diff --git a/drivers/scsi/csiostor/csio_hw.c b/drivers/scsi/csiostor/csio_hw.c
index 98d4d39aaa572..7fa20609d5e7f 100644
--- a/drivers/scsi/csiostor/csio_hw.c
+++ b/drivers/scsi/csiostor/csio_hw.c
@@ -2939,7 +2939,7 @@ csio_hws_quiescing(struct csio_hw *hw, enum csio_hw_ev evt)
 		case CSIO_HWE_FW_DLOAD:
 			csio_set_state(&hw->sm, csio_hws_resetting);
 			/* Download firmware */
-			/* Fall through */
+			fallthrough;
 
 		case CSIO_HWE_HBA_RESET:
 			csio_set_state(&hw->sm, csio_hws_resetting);
diff --git a/drivers/scsi/csiostor/csio_lnode.c b/drivers/scsi/csiostor/csio_lnode.c
index 61cf54208451a..dc98f51f466fb 100644
--- a/drivers/scsi/csiostor/csio_lnode.c
+++ b/drivers/scsi/csiostor/csio_lnode.c
@@ -1187,7 +1187,6 @@ csio_lns_online(struct csio_lnode *ln, enum csio_ln_ev evt)
 		break;
 
 	case CSIO_LNE_LINK_DOWN:
-		/* Fall through */
 	case CSIO_LNE_DOWN_LINK:
 		csio_set_state(&ln->sm, csio_lns_uninit);
 		if (csio_is_phys_ln(ln)) {
diff --git a/drivers/scsi/csiostor/csio_wr.c b/drivers/scsi/csiostor/csio_wr.c
index 0ca695110f549..9010cb6045dc5 100644
--- a/drivers/scsi/csiostor/csio_wr.c
+++ b/drivers/scsi/csiostor/csio_wr.c
@@ -808,7 +808,7 @@ csio_wr_destroy_queues(struct csio_hw *hw, bool cmd)
 
 				csio_q_eqid(hw, i) = CSIO_MAX_QID;
 			}
-			/* fall through */
+			fallthrough;
 		case CSIO_INGRESS:
 			if (csio_q_iqid(hw, i) != CSIO_MAX_QID) {
 				csio_wr_cleanup_iq_ftr(hw, i);
diff --git a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
index 2b48954b6b1ef..37d99357120fa 100644
--- a/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
+++ b/drivers/scsi/cxgbi/cxgb3i/cxgb3i.c
@@ -643,7 +643,7 @@ static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
 				 int *need_rst)
 {
 	switch (abort_reason) {
-	case CPL_ERR_BAD_SYN: /* fall through */
+	case CPL_ERR_BAD_SYN:
 	case CPL_ERR_CONN_RESET:
 		return csk->state > CTP_ESTABLISHED ? -EPIPE : -ECONNRESET;
 	case CPL_ERR_XMIT_TIMEDOUT:
diff --git a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
index 4e82c14cb795e..2c3491528d424 100644
--- a/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
+++ b/drivers/scsi/cxgbi/cxgb4i/cxgb4i.c
@@ -1133,7 +1133,7 @@ static int abort_status_to_errno(struct cxgbi_sock *csk, int abort_reason,
 								int *need_rst)
 {
 	switch (abort_reason) {
-	case CPL_ERR_BAD_SYN: /* fall through */
+	case CPL_ERR_BAD_SYN:
 	case CPL_ERR_CONN_RESET:
 		return csk->state > CTP_ESTABLISHED ?
 			-EPIPE : -ECONNRESET;
diff --git a/drivers/scsi/cxlflash/main.c b/drivers/scsi/cxlflash/main.c
index 94250ebe9e803..e72440d919d2a 100644
--- a/drivers/scsi/cxlflash/main.c
+++ b/drivers/scsi/cxlflash/main.c
@@ -748,16 +748,16 @@ static void term_intr(struct cxlflash_cfg *cfg, enum undo_level level,
 		/* SISL_MSI_ASYNC_ERROR is setup only for the primary HWQ */
 		if (index == PRIMARY_HWQ)
 			cfg->ops->unmap_afu_irq(hwq->ctx_cookie, 3, hwq);
-		/* fall through */
+		fallthrough;
 	case UNMAP_TWO:
 		cfg->ops->unmap_afu_irq(hwq->ctx_cookie, 2, hwq);
-		/* fall through */
+		fallthrough;
 	case UNMAP_ONE:
 		cfg->ops->unmap_afu_irq(hwq->ctx_cookie, 1, hwq);
-		/* fall through */
+		fallthrough;
 	case FREE_IRQ:
 		cfg->ops->free_afu_irqs(hwq->ctx_cookie);
-		/* fall through */
+		fallthrough;
 	case UNDO_NOOP:
 		/* No action required */
 		break;
@@ -971,18 +971,18 @@ static void cxlflash_remove(struct pci_dev *pdev)
 	switch (cfg->init_state) {
 	case INIT_STATE_CDEV:
 		cxlflash_release_chrdev(cfg);
-		/* fall through */
+		fallthrough;
 	case INIT_STATE_SCSI:
 		cxlflash_term_local_luns(cfg);
 		scsi_remove_host(cfg->host);
-		/* fall through */
+		fallthrough;
 	case INIT_STATE_AFU:
 		term_afu(cfg);
-		/* fall through */
+		fallthrough;
 	case INIT_STATE_PCI:
 		cfg->ops->destroy_afu(cfg->afu_cookie);
 		pci_disable_device(pdev);
-		/* fall through */
+		fallthrough;
 	case INIT_STATE_NONE:
 		free_mem(cfg);
 		scsi_host_put(cfg->host);
@@ -2355,11 +2355,11 @@ static int send_afu_cmd(struct afu *afu, struct sisl_ioarcb *rcb)
 			cxlflash_schedule_async_reset(cfg);
 			break;
 		}
-		/* fall through - to retry */
+		fallthrough;	/* to retry */
 	case -EAGAIN:
 		if (++nretry < 2)
 			goto retry;
-		/* fall through - to exit */
+		fallthrough;	/* to exit */
 	default:
 		break;
 	}
@@ -2533,12 +2533,12 @@ static int cxlflash_eh_host_reset_handler(struct scsi_cmnd *scp)
 			cfg->state = STATE_NORMAL;
 		wake_up_all(&cfg->reset_waitq);
 		ssleep(1);
-		/* fall through */
+		fallthrough;
 	case STATE_RESET:
 		wait_event(cfg->reset_waitq, cfg->state != STATE_RESET);
 		if (cfg->state == STATE_NORMAL)
 			break;
-		/* fall through */
+		fallthrough;
 	default:
 		rc = FAILED;
 		break;
@@ -3019,7 +3019,7 @@ static ssize_t num_hwqs_store(struct device *dev,
 		wait_event(cfg->reset_waitq, cfg->state != STATE_RESET);
 		if (cfg->state == STATE_NORMAL)
 			goto retry;
-		/* else, fall through */
+		fallthrough;
 	default:
 		/* Ideally should not happen */
 		dev_err(dev, "%s: Device is not ready, state=%d\n",
@@ -3531,7 +3531,7 @@ static long cxlflash_chr_ioctl(struct file *file, unsigned int cmd,
 		if (likely(do_ioctl))
 			break;
 
-		/* fall through */
+		fallthrough;
 	default:
 		rc = -EINVAL;
 		goto out;
diff --git a/drivers/scsi/cxlflash/superpipe.c b/drivers/scsi/cxlflash/superpipe.c
index 593669ac36694..5dddf67dfa24a 100644
--- a/drivers/scsi/cxlflash/superpipe.c
+++ b/drivers/scsi/cxlflash/superpipe.c
@@ -375,14 +375,13 @@ static int read_cap16(struct scsi_device *sdev, struct llun_info *lli)
 			switch (sshdr.sense_key) {
 			case NO_SENSE:
 			case RECOVERED_ERROR:
-				/* fall through */
 			case NOT_READY:
 				result &= ~SAM_STAT_CHECK_CONDITION;
 				break;
 			case UNIT_ATTENTION:
 				switch (sshdr.asc) {
 				case 0x29: /* Power on Reset or Device Reset */
-					/* fall through */
+					fallthrough;
 				case 0x2A: /* Device capacity changed */
 				case 0x3F: /* Report LUNs changed */
 					/* Retry the command once more */
@@ -1791,13 +1790,12 @@ static int process_sense(struct scsi_device *sdev,
 	switch (sshdr.sense_key) {
 	case NO_SENSE:
 	case RECOVERED_ERROR:
-		/* fall through */
 	case NOT_READY:
 		break;
 	case UNIT_ATTENTION:
 		switch (sshdr.asc) {
 		case 0x29: /* Power on Reset or Device Reset */
-			/* fall through */
+			fallthrough;
 		case 0x2A: /* Device settings/capacity changed */
 			rc = read_cap16(sdev, lli);
 			if (rc) {
@@ -2157,7 +2155,7 @@ int cxlflash_ioctl(struct scsi_device *sdev, unsigned int cmd, void __user *arg)
 		if (unlikely(rc))
 			goto cxlflash_ioctl_exit;
 
-		/* fall through */
+		fallthrough;
 
 	case DK_CXLFLASH_MANAGE_LUN:
 		known_ioctl = true;
@@ -2168,7 +2166,7 @@ int cxlflash_ioctl(struct scsi_device *sdev, unsigned int cmd, void __user *arg)
 		if (likely(do_ioctl))
 			break;
 
-		/* fall through */
+		fallthrough;
 	default:
 		rc = -EINVAL;
 		goto cxlflash_ioctl_exit;
diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
index 8acd4bb9fefbb..4a3f7831a2d64 100644
--- a/drivers/scsi/device_handler/scsi_dh_hp_sw.c
+++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
@@ -60,7 +60,7 @@ static int tur_done(struct scsi_device *sdev, struct hp_sw_dh_data *h,
 			ret = SCSI_DH_OK;
 			break;
 		}
-		/* Fallthrough */
+		fallthrough;
 	default:
 		sdev_printk(KERN_WARNING, sdev,
 			   "%s: sending tur failed, sense %x/%x/%x\n",
@@ -147,7 +147,7 @@ static int hp_sw_start_stop(struct hp_sw_dh_data *h)
 				rc = SCSI_DH_RETRY;
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		default:
 			sdev_printk(KERN_WARNING, sdev,
 				    "%s: sending start_stop_unit failed, "
diff --git a/drivers/scsi/esas2r/esas2r_flash.c b/drivers/scsi/esas2r/esas2r_flash.c
index b02ac389e6c60..429d64299fe94 100644
--- a/drivers/scsi/esas2r/esas2r_flash.c
+++ b/drivers/scsi/esas2r/esas2r_flash.c
@@ -1500,7 +1500,7 @@ bool esas2r_fm_api(struct esas2r_adapter *a, struct esas2r_flash_img *fi,
 			return complete_fmapi_req(a, rq, FI_STAT_SUCCESS);
 		}
 
-	/* fall through */
+		fallthrough;
 
 	case FI_ACT_UP: /* Upload the components */
 	default:
diff --git a/drivers/scsi/esas2r/esas2r_init.c b/drivers/scsi/esas2r/esas2r_init.c
index eb7d139ffc00b..09c5c24bf391f 100644
--- a/drivers/scsi/esas2r/esas2r_init.c
+++ b/drivers/scsi/esas2r/esas2r_init.c
@@ -1236,7 +1236,7 @@ static bool esas2r_format_init_msg(struct esas2r_adapter *a,
 			a->init_msg = ESAS2R_INIT_MSG_GET_INIT;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 
 	case ESAS2R_INIT_MSG_GET_INIT:
 		if (msg == ESAS2R_INIT_MSG_GET_INIT) {
@@ -1250,7 +1250,7 @@ static bool esas2r_format_init_msg(struct esas2r_adapter *a,
 				esas2r_hdebug("FAILED");
 			}
 		}
-		/* fall through */
+		fallthrough;
 
 	default:
 		rq->req_stat = RS_SUCCESS;
diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c
index 89afa31e33cba..43a1fd11df5ed 100644
--- a/drivers/scsi/esp_scsi.c
+++ b/drivers/scsi/esp_scsi.c
@@ -307,7 +307,7 @@ static void esp_reset_esp(struct esp *esp)
 
 	case FASHME:
 		esp->config2 |= (ESP_CONFIG2_HME32 | ESP_CONFIG2_HMEFENAB);
-		/* fallthrough... */
+		fallthrough;
 
 	case FAS236:
 	case PCSCSI:
@@ -1741,7 +1741,7 @@ static int esp_process_event(struct esp *esp)
 
 	case ESP_EVENT_DATA_IN:
 		write = 1;
-		/* fallthru */
+		fallthrough;
 
 	case ESP_EVENT_DATA_OUT: {
 		struct esp_cmd_entry *ent = esp->active_cmd;
diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c
index 1409c7687853c..5ea426effa609 100644
--- a/drivers/scsi/fcoe/fcoe_ctlr.c
+++ b/drivers/scsi/fcoe/fcoe_ctlr.c
@@ -450,10 +450,10 @@ void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
 		switch (fip->mode) {
 		default:
 			LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode);
-			/* fall-through */
+			fallthrough;
 		case FIP_MODE_AUTO:
 			LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n");
-			/* fall-through */
+			fallthrough;
 		case FIP_MODE_FABRIC:
 		case FIP_MODE_NON_FIP:
 			mutex_unlock(&fip->ctlr_mutex);
@@ -773,7 +773,7 @@ int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport,
 			fc_fcoe_set_mac(mac, fh->fh_d_id);
 			fip->update_mac(lport, mac);
 		}
-		/* fall through */
+		fallthrough;
 	case ELS_LS_RJT:
 		op = fr_encaps(fp);
 		if (op)
@@ -2439,7 +2439,7 @@ static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
 					  frport->enode_mac, 0);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case FIP_ST_VNMP_START:
 		LIBFCOE_FIP_DBG(fip, "vn_probe_req: "
 				"restart VN2VN negotiation\n");
diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
index 2cc676e3df6a7..29e4cdcade720 100644
--- a/drivers/scsi/g_NCR5380.c
+++ b/drivers/scsi/g_NCR5380.c
@@ -340,7 +340,7 @@ static int generic_NCR5380_init_one(struct scsi_host_template *tpnt,
 			break;
 		case BOARD_DTC3181E:
 			hostdata->io_width = 2;	/* 16-bit PDMA */
-			/* fall through */
+			fallthrough;
 		case BOARD_NCR53C400A:
 		case BOARD_HP_C2502:
 			hostdata->c400_ctl_status = 9;
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 11caa4b0d7977..d9d21d23372e5 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1144,7 +1144,7 @@ static int hisi_sas_control_phy(struct asd_sas_phy *sas_phy, enum phy_func func,
 			hisi_hba->hw->get_events(hisi_hba, phy_no);
 			break;
 		}
-		/* fallthru */
+		fallthrough;
 	case PHY_FUNC_RELEASE_SPINUP_HOLD:
 	default:
 		return -EOPNOTSUPP;
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index 91794a50b31fe..48d5da59262b4 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -4697,7 +4697,7 @@ static int fixup_ioaccel_cdb(u8 *cdb, int *cdb_len)
 	case WRITE_6:
 	case WRITE_12:
 		is_write = 1;
-		/* fall through */
+		fallthrough;
 	case READ_6:
 	case READ_12:
 		if (*cdb_len == 6) {
@@ -5147,7 +5147,7 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
 	switch (cmd->cmnd[0]) {
 	case WRITE_6:
 		is_write = 1;
-		/* fall through */
+		fallthrough;
 	case READ_6:
 		first_block = (((cmd->cmnd[1] & 0x1F) << 16) |
 				(cmd->cmnd[2] << 8) |
@@ -5158,7 +5158,7 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
 		break;
 	case WRITE_10:
 		is_write = 1;
-		/* fall through */
+		fallthrough;
 	case READ_10:
 		first_block =
 			(((u64) cmd->cmnd[2]) << 24) |
@@ -5171,7 +5171,7 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
 		break;
 	case WRITE_12:
 		is_write = 1;
-		/* fall through */
+		fallthrough;
 	case READ_12:
 		first_block =
 			(((u64) cmd->cmnd[2]) << 24) |
@@ -5186,7 +5186,7 @@ static int hpsa_scsi_ioaccel_raid_map(struct ctlr_info *h,
 		break;
 	case WRITE_16:
 		is_write = 1;
-		/* fall through */
+		fallthrough;
 	case READ_16:
 		first_block =
 			(((u64) cmd->cmnd[2]) << 56) |
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 77f4d37d5bd62..ea7c8930592dc 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -1866,7 +1866,7 @@ static int ibmvfc_bsg_request(struct bsg_job *job)
 		port_id = (bsg_request->rqst_data.h_els.port_id[0] << 16) |
 			(bsg_request->rqst_data.h_els.port_id[1] << 8) |
 			bsg_request->rqst_data.h_els.port_id[2];
-		/* fall through */
+		fallthrough;
 	case FC_BSG_RPT_ELS:
 		fc_flags = IBMVFC_FC_ELS;
 		break;
@@ -1875,7 +1875,7 @@ static int ibmvfc_bsg_request(struct bsg_job *job)
 		port_id = (bsg_request->rqst_data.h_ct.port_id[0] << 16) |
 			(bsg_request->rqst_data.h_ct.port_id[1] << 8) |
 			bsg_request->rqst_data.h_ct.port_id[2];
-		/* fall through */
+		fallthrough;
 	case FC_BSG_RPT_CT:
 		fc_flags = IBMVFC_FC_CT_IU;
 		break;
@@ -4122,7 +4122,7 @@ static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt)
 		return;
 	case IBMVFC_MAD_CRQ_ERROR:
 		ibmvfc_retry_host_init(vhost);
-		/* fall through */
+		fallthrough;
 	case IBMVFC_MAD_DRIVER_FAILED:
 		ibmvfc_free_event(evt);
 		return;
diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
index d9e94e81da017..cc3908c2d2f94 100644
--- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
+++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
@@ -1581,7 +1581,7 @@ static long ibmvscsis_adapter_info(struct scsi_info *vscsi,
 	case H_PERMISSION:
 		if (connection_broken(vscsi))
 			flag_bits = (RESPONSE_Q_DOWN | CLIENT_FAILED);
-		/* Fall through */
+		fallthrough;
 	default:
 		dev_err(&vscsi->dev, "adapter_info: h_copy_rdma to client failed, rc %ld\n",
 			rc);
@@ -2489,10 +2489,10 @@ static long ibmvscsis_ping_response(struct scsi_info *vscsi)
 		break;
 	case H_CLOSED:
 		vscsi->flags |= CLIENT_FAILED;
-		/* Fall through */
+		fallthrough;
 	case H_DROPPED:
 		vscsi->flags |= RESPONSE_Q_DOWN;
-		/* Fall through */
+		fallthrough;
 	case H_REMOTE_PARM:
 		dev_err(&vscsi->dev, "ping_response: h_send_crq failed, rc %ld\n",
 			rc);
diff --git a/drivers/scsi/imm.c b/drivers/scsi/imm.c
index 1459b14670279..862d35a098cf3 100644
--- a/drivers/scsi/imm.c
+++ b/drivers/scsi/imm.c
@@ -801,7 +801,7 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 	case 1:		/* Phase 1 - Connected */
 		imm_connect(dev, CONNECT_EPP_MAYBE);
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 2:		/* Phase 2 - We are now talking to the scsi bus */
 		if (!imm_select(dev, scmd_id(cmd))) {
@@ -809,7 +809,7 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 			return 0;
 		}
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 3:		/* Phase 3 - Ready to accept a command */
 		w_ctr(ppb, 0x0c);
@@ -819,7 +819,7 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 		if (!imm_send_command(cmd))
 			return 0;
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 4:		/* Phase 4 - Setup scatter/gather buffers */
 		if (scsi_bufflen(cmd)) {
@@ -835,7 +835,7 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 		cmd->SCp.phase++;
 		if (cmd->SCp.this_residual & 0x01)
 			cmd->SCp.this_residual++;
-		/* fall through */
+		fallthrough;
 
 	case 5:		/* Phase 5 - Pre-Data transfer stage */
 		/* Spin lock for BUSY */
@@ -852,7 +852,7 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 			if (imm_negotiate(dev))
 				return 0;
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 6:		/* Phase 6 - Data transfer stage */
 		/* Spin lock for BUSY */
@@ -868,7 +868,7 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 				return 1;
 		}
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 7:		/* Phase 7 - Post data transfer stage */
 		if ((dev->dp) && (dev->rd)) {
@@ -880,7 +880,7 @@ static int imm_engine(imm_struct *dev, struct scsi_cmnd *cmd)
 			}
 		}
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 8:		/* Phase 8 - Read status/message */
 		/* Check for data overrun */
diff --git a/drivers/scsi/isci/phy.c b/drivers/scsi/isci/phy.c
index 7f9b3f20e5e42..4cacb800b5309 100644
--- a/drivers/scsi/isci/phy.c
+++ b/drivers/scsi/isci/phy.c
@@ -778,7 +778,7 @@ enum sci_status sci_phy_event_handler(struct isci_phy *iphy, u32 event_code)
 			break;
 		case SCU_EVENT_LINK_FAILURE:
 			scu_link_layer_set_txcomsas_timeout(iphy, SCU_SAS_LINK_LAYER_TXCOMSAS_NEGTIME_DEFAULT);
-			/* fall through */
+			fallthrough;
 		case SCU_EVENT_HARD_RESET_RECEIVED:
 			/* Start the oob/sn state machine over again */
 			sci_change_state(&iphy->sm, SCI_PHY_STARTING);
diff --git a/drivers/scsi/isci/remote_device.c b/drivers/scsi/isci/remote_device.c
index cd1e4b4d95bbb..c3f540b556895 100644
--- a/drivers/scsi/isci/remote_device.c
+++ b/drivers/scsi/isci/remote_device.c
@@ -310,7 +310,7 @@ static void isci_remote_device_not_ready(struct isci_host *ihost,
 		/* Kill all outstanding requests for the device. */
 		sci_remote_device_terminate_requests(idev);
 
-		/* Fall through - into the default case... */
+		fallthrough;	/* into the default case */
 	default:
 		clear_bit(IDEV_IO_READY, &idev->flags);
 		break;
@@ -593,7 +593,7 @@ enum sci_status sci_remote_device_event_handler(struct isci_remote_device *idev,
 
 			break;
 		}
-		/* fall through - and treat as unhandled... */
+		fallthrough;	/* and treat as unhandled */
 	default:
 		dev_dbg(scirdev_to_dev(idev),
 			"%s: device: %p event code: %x: %s\n",
diff --git a/drivers/scsi/isci/remote_node_context.c b/drivers/scsi/isci/remote_node_context.c
index 474a434609636..68333f523b351 100644
--- a/drivers/scsi/isci/remote_node_context.c
+++ b/drivers/scsi/isci/remote_node_context.c
@@ -225,7 +225,7 @@ static void sci_remote_node_context_continue_state_transitions(struct sci_remote
 	case RNC_DEST_READY:
 	case RNC_DEST_SUSPENDED_RESUME:
 		rnc->destination_state = RNC_DEST_READY;
-		/* Fall through... */
+		fallthrough;
 	case RNC_DEST_FINAL:
 		sci_remote_node_context_resume(rnc, rnc->user_callback,
 					       rnc->user_cookie);
@@ -601,9 +601,9 @@ enum sci_status sci_remote_node_context_suspend(
 				 __func__, sci_rnc);
 			return SCI_FAILURE_INVALID_STATE;
 		}
-		/* Fall through - and handle like SCI_RNC_POSTING */
+		fallthrough;	/* and handle like SCI_RNC_POSTING */
 	case SCI_RNC_RESUMING:
-		/* Fall through - and handle like SCI_RNC_POSTING */
+		fallthrough;	/* and handle like SCI_RNC_POSTING */
 	case SCI_RNC_POSTING:
 		/* Set the destination state to AWAIT - this signals the
 		 * entry into the SCI_RNC_READY state that a suspension
diff --git a/drivers/scsi/isci/request.c b/drivers/scsi/isci/request.c
index 6561a07db1899..6e0817941fa74 100644
--- a/drivers/scsi/isci/request.c
+++ b/drivers/scsi/isci/request.c
@@ -894,7 +894,7 @@ sci_io_request_terminate(struct isci_request *ireq)
 		 * and don't wait for the task response.
 		 */
 		sci_change_state(&ireq->sm, SCI_REQ_ABORTING);
-		/* Fall through - and handle like ABORTING... */
+		fallthrough;	/* and handle like ABORTING */
 	case SCI_REQ_ABORTING:
 		if (!isci_remote_device_is_safe_to_abort(ireq->target_device))
 			set_bit(IREQ_PENDING_ABORT, &ireq->flags);
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 16eb3b60ed582..96a2952cf626b 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -2108,7 +2108,7 @@ static void fc_exch_rrq_resp(struct fc_seq *sp, struct fc_frame *fp, void *arg)
 	switch (op) {
 	case ELS_LS_RJT:
 		FC_EXCH_DBG(aborted_ep, "LS_RJT for RRQ\n");
-		/* fall through */
+		fallthrough;
 	case ELS_LS_ACC:
 		goto cleanup;
 	default:
@@ -2622,7 +2622,7 @@ void fc_exch_recv(struct fc_lport *lport, struct fc_frame *fp)
 	case FC_EOF_T:
 		if (f_ctl & FC_FC_END_SEQ)
 			skb_trim(fp_skb(fp), fr_len(fp) - FC_FC_FILL(f_ctl));
-		/* fall through */
+		fallthrough;
 	case FC_EOF_N:
 		if (fh->fh_type == FC_TYPE_BLS)
 			fc_exch_recv_bls(ema->mp, fp);
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index e11d4f002bd49..7cfeb6886237c 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -752,7 +752,7 @@ static void fc_fcp_abts_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 		brp = fc_frame_payload_get(fp, sizeof(*brp));
 		if (brp && brp->br_reason == FC_BA_RJT_LOG_ERR)
 			break;
-		/* fall thru */
+		fallthrough;
 	default:
 		/*
 		 * we will let the command timeout
@@ -1536,7 +1536,7 @@ static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
 				   "device %x invalid REC reject %d/%d\n",
 				   fsp->rport->port_id, rjt->er_reason,
 				   rjt->er_explan);
-			/* fall through */
+			fallthrough;
 		case ELS_RJT_UNSUP:
 			FC_FCP_DBG(fsp, "device does not support REC\n");
 			rpriv = fsp->rport->dd_data;
@@ -1668,7 +1668,7 @@ static void fc_fcp_rec_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 		FC_FCP_DBG(fsp, "REC %p fid %6.6x error unexpected error %d\n",
 			   fsp, fsp->rport->port_id, error);
 		fsp->status_code = FC_CMD_PLOGO;
-		/* fall through */
+		fallthrough;
 
 	case -FC_EX_TIMEOUT:
 		/*
@@ -1830,7 +1830,7 @@ static void fc_fcp_srr_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
 		break;
 	case -FC_EX_CLOSED:			/* e.g., link failure */
 		FC_FCP_DBG(fsp, "SRR error, exchange closed\n");
-		/* fall through */
+		fallthrough;
 	default:
 		fc_fcp_retry_cmd(fsp, FC_ERROR);
 		break;
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index b84dbc316df15..6557fda85c5c7 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -1578,7 +1578,7 @@ static void fc_lport_timeout(struct work_struct *work)
 	case LPORT_ST_DPRT:
 		FC_LPORT_DBG(lport, "Skipping lport state %s to SCR\n",
 			     fc_lport_state(lport));
-		/* fall thru */
+		fallthrough;
 	case LPORT_ST_SCR:
 		fc_lport_enter_scr(lport);
 		break;
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 18663a82865f9..a60b228d13f16 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -1723,7 +1723,7 @@ static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp)
 			kref_put(&rdata->kref, fc_rport_destroy);
 			goto busy;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		FC_RPORT_DBG(rdata,
 			     "Reject ELS 0x%02x while in state %s\n",
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index 49c8a1818baf8..1e9c3171fa9f4 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -248,7 +248,7 @@ static int iscsi_check_tmf_restrictions(struct iscsi_task *task, int opcode)
 		hdr_lun = scsilun_to_int(&tmf->lun);
 		if (hdr_lun != task->sc->device->lun)
 			return 0;
-		/* fall through */
+		fallthrough;
 	case ISCSI_TM_FUNC_TARGET_WARM_RESET:
 		/*
 		 * Fail all SCSI cmd PDUs
@@ -1674,7 +1674,7 @@ int iscsi_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *sc)
 				sc->result = DID_NO_CONNECT << 16;
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		case ISCSI_STATE_IN_RECOVERY:
 			reason = FAILURE_SESSION_IN_RECOVERY;
 			sc->result = DID_IMM_RETRY << 16;
@@ -2239,7 +2239,7 @@ int iscsi_eh_abort(struct scsi_cmnd *sc)
 					      "progress\n");
 			goto success;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		conn->tmf_state = TMF_INITIAL;
 		goto failed;
diff --git a/drivers/scsi/libiscsi_tcp.c b/drivers/scsi/libiscsi_tcp.c
index 6ef93c7af9548..37e5d4e48c2f2 100644
--- a/drivers/scsi/libiscsi_tcp.c
+++ b/drivers/scsi/libiscsi_tcp.c
@@ -772,7 +772,7 @@ iscsi_tcp_hdr_dissect(struct iscsi_conn *conn, struct iscsi_hdr *hdr)
 			iscsi_tcp_data_recv_prep(tcp_conn);
 			return 0;
 		}
-	/* fall through */
+		fallthrough;
 	case ISCSI_OP_LOGOUT_RSP:
 	case ISCSI_OP_NOOP_IN:
 	case ISCSI_OP_SCSI_TMFUNC_RSP:
diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 1b93332daa6b3..6a521ba7a6166 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -324,7 +324,7 @@ static int smp_ata_check_ready(struct ata_link *link)
 	case SAS_END_DEVICE:
 		if (ex_phy->attached_sata_dev)
 			return sas_ata_clear_pending(dev, ex_phy);
-		/* fall through */
+		fallthrough;
 	default:
 		return -ENODEV;
 	}
diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index daf951b0b3f55..cd7c7d269f6f4 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -108,7 +108,7 @@ static int sas_get_port_device(struct asd_sas_port *port)
 			rphy = NULL;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case SAS_END_DEVICE:
 		rphy = sas_end_device_alloc(port->port);
 		break;
diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c
index b7d1b1ea185d7..8d6bcc19359ff 100644
--- a/drivers/scsi/libsas/sas_expander.c
+++ b/drivers/scsi/libsas/sas_expander.c
@@ -1096,7 +1096,7 @@ static int sas_ex_discover_dev(struct domain_device *dev, int phy_id)
 		} else
 			memcpy(dev->port->disc.fanout_sas_addr,
 			       ex_phy->attached_sas_addr, SAS_ADDR_SIZE);
-		/* fallthrough */
+		fallthrough;
 	case SAS_EDGE_EXPANDER_DEVICE:
 		child = sas_ex_discover_expander(dev, phy_id);
 		break;
diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c
index 9e0975e55c27e..1bf939818c981 100644
--- a/drivers/scsi/libsas/sas_scsi_host.c
+++ b/drivers/scsi/libsas/sas_scsi_host.c
@@ -622,7 +622,7 @@ static void sas_eh_handle_sas_errors(struct Scsi_Host *shost, struct list_head *
 				sas_scsi_clear_queue_lu(work_q, cmd);
 				goto Again;
 			}
-			/* fallthrough */
+			fallthrough;
 		case TASK_IS_NOT_AT_LU:
 		case TASK_ABORT_FAILED:
 			pr_notice("task 0x%p is not at LU: I_T recover\n",
diff --git a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c
index ef2015fad2d59..d0141a23a8337 100644
--- a/drivers/scsi/lpfc/lpfc_ct.c
+++ b/drivers/scsi/lpfc/lpfc_ct.c
@@ -3202,7 +3202,7 @@ lpfc_fdmi_cmd(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	case SLI_MGMT_GHAT:
 	case SLI_MGMT_GRPL:
 		rsp_size = FC_MAX_NS_RSP;
-		/* fall through */
+		fallthrough;
 	case SLI_MGMT_DHBA:
 	case SLI_MGMT_DHAT:
 		pe = (struct lpfc_fdmi_port_entry *)&CtReq->un.PortID;
@@ -3215,7 +3215,7 @@ lpfc_fdmi_cmd(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	case SLI_MGMT_GPAT:
 	case SLI_MGMT_GPAS:
 		rsp_size = FC_MAX_NS_RSP;
-		/* fall through */
+		fallthrough;
 	case SLI_MGMT_DPRT:
 	case SLI_MGMT_DPA:
 		pe = (struct lpfc_fdmi_port_entry *)&CtReq->un.PortID;
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 48dc63f22ccad..6aae61d6ee165 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -9134,7 +9134,7 @@ lpfc_cmpl_reg_new_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
 				lpfc_nlp_put(ndlp);
 				return;
 			}
-			/* fall through */
+			fallthrough;
 		default:
 			/* Try to recover from this error */
 			if (phba->sli_rev == LPFC_SLI_REV4)
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index 142a021144793..d32c7e7ab09d6 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -4728,15 +4728,14 @@ lpfc_check_sli_ndlp(struct lpfc_hba *phba,
 		case CMD_GEN_REQUEST64_CR:
 			if (iocb->context_un.ndlp == ndlp)
 				return 1;
-			/* fall through */
+			fallthrough;
 		case CMD_ELS_REQUEST64_CR:
 			if (icmd->un.elsreq64.remoteID == ndlp->nlp_DID)
 				return 1;
-			/* fall through */
+			fallthrough;
 		case CMD_XMIT_ELS_RSP64_CX:
 			if (iocb->context1 == (uint8_t *) ndlp)
 				return 1;
-			/* fall through */
 		}
 	} else if (pring->ringno == LPFC_FCP_RING) {
 		/* Skip match check if waiting to relogin to FCP target */
@@ -6055,7 +6054,7 @@ lpfc_disc_timeout_handler(struct lpfc_vport *vport)
 
 	case LPFC_LINK_UP:
 		lpfc_issue_clear_la(phba, vport);
-		/* fall through */
+		fallthrough;
 	case LPFC_LINK_UNKNOWN:
 	case LPFC_WARM_START:
 	case LPFC_INIT_START:
diff --git a/drivers/scsi/lpfc/lpfc_nportdisc.c b/drivers/scsi/lpfc/lpfc_nportdisc.c
index cad53d19cb25f..92d6e7b98770d 100644
--- a/drivers/scsi/lpfc/lpfc_nportdisc.c
+++ b/drivers/scsi/lpfc/lpfc_nportdisc.c
@@ -464,7 +464,7 @@ lpfc_rcv_plogi(struct lpfc_vport *vport, struct lpfc_nodelist *ndlp,
 	case  NLP_STE_NPR_NODE:
 		if (!(ndlp->nlp_flag & NLP_NPR_ADISC))
 			break;
-		/* fall through */
+		fallthrough;
 	case  NLP_STE_REG_LOGIN_ISSUE:
 	case  NLP_STE_PRLI_ISSUE:
 	case  NLP_STE_UNMAPPED_NODE:
diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c
index e5be334d6a119..0c39ed50998c8 100644
--- a/drivers/scsi/lpfc/lpfc_nvme.c
+++ b/drivers/scsi/lpfc/lpfc_nvme.c
@@ -1225,7 +1225,7 @@ lpfc_nvme_io_cmd_wqe_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn,
 					 lpfc_ncmd, nCmd,
 					 lpfc_ncmd->cur_iocbq.sli4_xritag,
 					 bf_get(lpfc_wcqe_c_xb, wcqe));
-			/* fall through */
+			fallthrough;
 		default:
 out_err:
 			lpfc_printf_vlog(vport, KERN_INFO, LOG_NVME_IOERR,
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index 5e802c8b22a99..983eeb0e3d07e 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -1093,7 +1093,7 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 
 					break;
 				}
-				/* fall through */
+				fallthrough;
 			case SCSI_PROT_WRITE_INSERT:
 				/*
 				 * For WRITE_INSERT, force the error
@@ -1213,7 +1213,7 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 					rc = BG_ERR_TGT | BG_ERR_CHECK;
 					break;
 				}
-				/* fall through */
+				fallthrough;
 			case SCSI_PROT_WRITE_INSERT:
 				/*
 				 * For WRITE_INSERT, force the
@@ -1295,7 +1295,7 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 			switch (op) {
 			case SCSI_PROT_WRITE_PASS:
 				rc = BG_ERR_CHECK;
-				/* fall through */
+				fallthrough;
 
 			case SCSI_PROT_WRITE_INSERT:
 				/*
@@ -3980,7 +3980,7 @@ lpfc_scsi_cmd_iocb_cmpl(struct lpfc_hba *phba, struct lpfc_iocbq *pIocbIn,
 					lpfc_cmd->cur_iocbq.sli4_lxritag,
 					0, 0);
 			}
-			/* fall through */
+			fallthrough;
 		default:
 			cmd->result = DID_ERROR << 16;
 			break;
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 4cd7ded656b7d..e158cd77d387f 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -9339,7 +9339,7 @@ __lpfc_sli_issue_iocb_s3(struct lpfc_hba *phba, uint32_t ring_number,
 			 */
 			if (piocb->iocb_cmpl)
 				piocb->iocb_cmpl = NULL;
-			/*FALLTHROUGH*/
+			fallthrough;
 		case CMD_CREATE_XRI_CR:
 		case CMD_CLOSE_XRI_CN:
 		case CMD_CLOSE_XRI_CX:
@@ -9653,7 +9653,7 @@ lpfc_sli4_iocb2wqe(struct lpfc_hba *phba, struct lpfc_iocbq *iocbq,
 		cmnd = CMD_XMIT_SEQUENCE64_CR;
 		if (phba->link_flag & LS_LOOPBACK_MODE)
 			bf_set(wqe_xo, &wqe->xmit_sequence.wge_ctl, 1);
-		/* fall through */
+		fallthrough;
 	case CMD_XMIT_SEQUENCE64_CR:
 		/* word3 iocb=io_tag32 wqe=reserved */
 		wqe->xmit_sequence.rsvd3 = 0;
@@ -13630,7 +13630,7 @@ lpfc_sli4_sp_handle_rcqe(struct lpfc_hba *phba, struct lpfc_rcqe *rcqe)
 	case FC_STATUS_RQ_BUF_LEN_EXCEEDED:
 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 				"2537 Receive Frame Truncated!!\n");
-		/* fall through */
+		fallthrough;
 	case FC_STATUS_RQ_SUCCESS:
 		spin_lock_irqsave(&phba->hbalock, iflags);
 		lpfc_sli4_rq_release(hrq, drq);
@@ -13678,7 +13678,7 @@ lpfc_sli4_sp_handle_rcqe(struct lpfc_hba *phba, struct lpfc_rcqe *rcqe)
 					atomic_read(&tgtp->rcv_fcp_cmd_out),
 					atomic_read(&tgtp->xmt_fcp_release));
 		}
-		/* fallthrough */
+		fallthrough;
 
 	case FC_STATUS_INSUFF_BUF_NEED_BUF:
 		hrq->RQ_no_posted_buf++;
@@ -14162,7 +14162,7 @@ lpfc_sli4_nvmet_handle_rcqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
 	case FC_STATUS_RQ_BUF_LEN_EXCEEDED:
 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 				"6126 Receive Frame Truncated!!\n");
-		/* fall through */
+		fallthrough;
 	case FC_STATUS_RQ_SUCCESS:
 		spin_lock_irqsave(&phba->hbalock, iflags);
 		lpfc_sli4_rq_release(hrq, drq);
@@ -14209,7 +14209,7 @@ lpfc_sli4_nvmet_handle_rcqe(struct lpfc_hba *phba, struct lpfc_queue *cq,
 					atomic_read(&tgtp->rcv_fcp_cmd_out),
 					atomic_read(&tgtp->xmt_fcp_release));
 		}
-		/* fallthrough */
+		fallthrough;
 
 	case FC_STATUS_INSUFF_BUF_NEED_BUF:
 		hrq->RQ_no_posted_buf++;
@@ -15096,7 +15096,7 @@ lpfc_eq_create(struct lpfc_hba *phba, struct lpfc_queue *eq, uint32_t imax)
 			status = -EINVAL;
 			goto out;
 		}
-		/* fall through - otherwise default to smallest count */
+		fallthrough;	/* otherwise default to smallest count */
 	case 256:
 		bf_set(lpfc_eq_context_count, &eq_create->u.request.context,
 		       LPFC_EQ_CNT_256);
@@ -15238,7 +15238,7 @@ lpfc_cq_create(struct lpfc_hba *phba, struct lpfc_queue *cq,
 			       LPFC_CQ_CNT_WORD7);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 				"0361 Unsupported CQ count: "
@@ -15249,7 +15249,7 @@ lpfc_cq_create(struct lpfc_hba *phba, struct lpfc_queue *cq,
 			status = -EINVAL;
 			goto out;
 		}
-		/* fall through - otherwise default to smallest count */
+		fallthrough;	/* otherwise default to smallest count */
 	case 256:
 		bf_set(lpfc_cq_context_count, &cq_create->u.request.context,
 		       LPFC_CQ_CNT_256);
@@ -15417,7 +15417,7 @@ lpfc_cq_create_set(struct lpfc_hba *phba, struct lpfc_queue **cqp,
 					       LPFC_CQ_CNT_WORD7);
 					break;
 				}
-				/* fall through */
+				fallthrough;
 			default:
 				lpfc_printf_log(phba, KERN_ERR, LOG_TRACE_EVENT,
 						"3118 Bad CQ count. (%d)\n",
@@ -15426,7 +15426,7 @@ lpfc_cq_create_set(struct lpfc_hba *phba, struct lpfc_queue **cqp,
 					status = -EINVAL;
 					goto out;
 				}
-				/* fall through - otherwise default to smallest */
+				fallthrough;	/* otherwise default to smallest */
 			case 256:
 				bf_set(lpfc_mbx_cq_create_set_cqe_cnt,
 				       &cq_set->u.request, LPFC_CQ_CNT_256);
@@ -15702,7 +15702,7 @@ lpfc_mq_create(struct lpfc_hba *phba, struct lpfc_queue *mq,
 			status = -EINVAL;
 			goto out;
 		}
-		/* fall through - otherwise default to smallest count */
+		fallthrough;	/* otherwise default to smallest count */
 	case 16:
 		bf_set(lpfc_mq_context_ring_size,
 		       &mq_create_ext->u.request.context,
@@ -16123,7 +16123,7 @@ lpfc_rq_create(struct lpfc_hba *phba, struct lpfc_queue *hrq,
 				status = -EINVAL;
 				goto out;
 			}
-			/* fall through - otherwise default to smallest count */
+			fallthrough;	/* otherwise default to smallest count */
 		case 512:
 			bf_set(lpfc_rq_context_rqe_count,
 			       &rq_create->u.request.context,
@@ -16260,7 +16260,7 @@ lpfc_rq_create(struct lpfc_hba *phba, struct lpfc_queue *hrq,
 				status = -EINVAL;
 				goto out;
 			}
-			/* fall through - otherwise default to smallest count */
+			fallthrough;	/* otherwise default to smallest count */
 		case 512:
 			bf_set(lpfc_rq_context_rqe_count,
 			       &rq_create->u.request.context,
diff --git a/drivers/scsi/megaraid.c b/drivers/scsi/megaraid.c
index 0484ee52ae802..ac406049e7c8a 100644
--- a/drivers/scsi/megaraid.c
+++ b/drivers/scsi/megaraid.c
@@ -491,9 +491,9 @@ mega_get_ldrv_num(adapter_t *adapter, struct scsi_cmnd *cmd, int channel)
 
 	if (adapter->support_random_del && adapter->read_ldidmap )
 		switch (cmd->cmnd[0]) {
-		case READ_6:	/* fall through */
-		case WRITE_6:	/* fall through */
-		case READ_10:	/* fall through */
+		case READ_6:
+		case WRITE_6:
+		case READ_10:
 		case WRITE_10:
 			ldrv_num += 0x80;
 		}
@@ -852,7 +852,7 @@ mega_build_cmd(adapter_t *adapter, struct scsi_cmnd *cmd, int *busy)
 			return scb;
 
 #if MEGA_HAVE_CLUSTERING
-		case RESERVE:	/* Fall through */
+		case RESERVE:
 		case RELEASE:
 
 			/*
@@ -987,7 +987,7 @@ mega_prepare_passthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *cmd,
 
 			adapter->flag |= (1L << cmd->device->channel);
 		}
-		/* Fall through */
+		fallthrough;
 	default:
 		pthru->numsgelements = mega_build_sglist(adapter, scb,
 				&pthru->dataxferaddr, &pthru->dataxferlen);
@@ -1050,7 +1050,7 @@ mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb,
 
 			adapter->flag |= (1L << cmd->device->channel);
 		}
-		/* Fall through */
+		fallthrough;
 	default:
 		epthru->numsgelements = mega_build_sglist(adapter, scb,
 				&epthru->dataxferaddr, &epthru->dataxferlen);
diff --git a/drivers/scsi/megaraid/megaraid_mbox.c b/drivers/scsi/megaraid/megaraid_mbox.c
index 19469a2c0ea36..4a27ac869f2e2 100644
--- a/drivers/scsi/megaraid/megaraid_mbox.c
+++ b/drivers/scsi/megaraid/megaraid_mbox.c
@@ -1581,7 +1581,7 @@ megaraid_mbox_build_cmd(adapter_t *adapter, struct scsi_cmnd *scp, int *busy)
 				return NULL;
 			}
 
-			/* Fall through */
+			fallthrough;
 
 		case READ_CAPACITY:
 			/*
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 861f7140f52e8..2b7e7b5f38edf 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -3522,7 +3522,7 @@ megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
 			megasas_complete_int_cmd(instance, cmd);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 
 	case MFI_CMD_LD_READ:
 	case MFI_CMD_LD_WRITE:
diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 0824410f78f8a..883cccb59c2de 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -3534,7 +3534,7 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex,
 				atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
 				cmd_fusion->scmd->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
 			}
-			/* Fall through - and complete IO */
+			fallthrough;	/* and complete IO */
 		case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
 			atomic_dec(&instance->fw_outstanding);
 			if (cmd_fusion->r1_alt_dev_handle == MR_DEVHANDLE_INVALID) {
diff --git a/drivers/scsi/mesh.c b/drivers/scsi/mesh.c
index fd1d030640797..0a9f4e44ab2cb 100644
--- a/drivers/scsi/mesh.c
+++ b/drivers/scsi/mesh.c
@@ -1457,7 +1457,7 @@ static void cmd_complete(struct mesh_state *ms)
 		/* huh?  we expected a phase mismatch */
 		ms->n_msgin = 0;
 		ms->msgphase = msg_in;
-		/* fall through */
+		fallthrough;
 
 	case msg_in:
 		/* should have some message bytes in fifo */
diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 1d64524cd8631..5730f32496b64 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -4681,7 +4681,7 @@ _base_update_ioc_page1_inlinewith_perf_mode(struct MPT3SAS_ADAPTER *ioc)
 			ioc_info(ioc, "performance mode: balanced\n");
 			return;
 		}
-		/* Fall through */
+		fallthrough;
 	case MPT_PERF_MODE_LATENCY:
 		/*
 		 * Enable interrupt coalescing on all reply queues
diff --git a/drivers/scsi/mpt3sas/mpt3sas_ctl.c b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
index 43260306668cf..7c119b9048349 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_ctl.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_ctl.c
@@ -1002,7 +1002,7 @@ _ctl_do_mpt_command(struct MPT3SAS_ADAPTER *ioc, struct mpt3_ioctl_command karg,
 		}
 		/* drop to default case for posting the request */
 	}
-		/* fall through */
+		fallthrough;
 	default:
 		ioc->build_sg_mpi(ioc, psge, data_out_dma, data_out_sz,
 		    data_in_dma, data_in_sz);
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 08fc4b381056c..2e2756d8a49b1 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -5470,7 +5470,7 @@ _scsih_io_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
 
 	case MPI2_IOCSTATUS_SCSI_DATA_OVERRUN:
 		scsi_set_resid(scmd, 0);
-		/* fall through */
+		fallthrough;
 	case MPI2_IOCSTATUS_SCSI_RECOVERED_ERROR:
 	case MPI2_IOCSTATUS_SUCCESS:
 		scmd->result = (DID_OK << 16) | scsi_status;
@@ -6480,7 +6480,7 @@ _scsih_sas_topology_change_event(struct MPT3SAS_ADAPTER *ioc,
 			if (!test_bit(handle, ioc->pend_os_device_add))
 				break;
 
-			/* fall through */
+			fallthrough;
 
 		case MPI2_EVENT_SAS_TOPO_RC_TARG_ADDED:
 
@@ -7208,7 +7208,7 @@ _scsih_pcie_topology_change_event(struct MPT3SAS_ADAPTER *ioc,
 			event_data->PortEntry[i].PortStatus &= 0xF0;
 			event_data->PortEntry[i].PortStatus |=
 				MPI26_EVENT_PCIE_TOPO_PS_DEV_ADDED;
-			/* fall through */
+			fallthrough;
 		case MPI26_EVENT_PCIE_TOPO_PS_DEV_ADDED:
 			if (ioc->shost_recovery)
 				break;
@@ -10653,7 +10653,7 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		case MPI26_MFGPAGE_DEVID_CFG_SEC_3916:
 			dev_info(&pdev->dev,
 			    "HBA is in Configurable Secure mode\n");
-			/* fall through */
+			fallthrough;
 		case MPI26_MFGPAGE_DEVID_HARD_SEC_3816:
 		case MPI26_MFGPAGE_DEVID_HARD_SEC_3916:
 			ioc->is_aero_ioc = ioc->is_gen35_ioc = 1;
diff --git a/drivers/scsi/myrb.c b/drivers/scsi/myrb.c
index d4bd31a75b9db..b2869c5dd7fb5 100644
--- a/drivers/scsi/myrb.c
+++ b/drivers/scsi/myrb.c
@@ -650,7 +650,7 @@ static void myrb_bgi_control(struct myrb_hba *cb)
 		if (sdev && cb->bgi_status.status == MYRB_BGI_INPROGRESS)
 			sdev_printk(KERN_INFO, sdev,
 				    "Background Initialization Aborted\n");
-		/* Fallthrough */
+		fallthrough;
 	case MYRB_STATUS_NO_BGI_INPROGRESS:
 		cb->bgi_status.status = MYRB_BGI_INVALID;
 		break;
@@ -1528,7 +1528,7 @@ static int myrb_ldev_queuecommand(struct Scsi_Host *shost,
 			scmd->scsi_done(scmd);
 			return 0;
 		}
-		/* fall through */
+		fallthrough;
 	case WRITE_6:
 		lba = (((scmd->cmnd[1] & 0x1F) << 16) |
 		       (scmd->cmnd[2] << 8) |
@@ -1545,7 +1545,7 @@ static int myrb_ldev_queuecommand(struct Scsi_Host *shost,
 			scmd->scsi_done(scmd);
 			return 0;
 		}
-		/* fall through */
+		fallthrough;
 	case WRITE_10:
 	case VERIFY:		/* 0x2F */
 	case WRITE_VERIFY:	/* 0x2E */
@@ -1562,7 +1562,7 @@ static int myrb_ldev_queuecommand(struct Scsi_Host *shost,
 			scmd->scsi_done(scmd);
 			return 0;
 		}
-		/* fall through */
+		fallthrough;
 	case WRITE_12:
 	case VERIFY_12: /* 0xAF */
 	case WRITE_VERIFY_12:	/* 0xAE */
diff --git a/drivers/scsi/ncr53c8xx.c b/drivers/scsi/ncr53c8xx.c
index f88adab3f9135..03d70138ad58d 100644
--- a/drivers/scsi/ncr53c8xx.c
+++ b/drivers/scsi/ncr53c8xx.c
@@ -3640,7 +3640,7 @@ ncr_script_copy_and_bind (struct ncb *np, ncrcmd *src, ncrcmd *dst, int len)
 						new = old;
 						break;
 					}
-					/* fall through */
+					fallthrough;
 				default:
 					panic("ncr_script_copy_and_bind: weird relocation %x\n", old);
 					break;
@@ -3910,14 +3910,14 @@ static void __init ncr_prepare_setting(struct ncb *np)
 					np->scsi_mode = SMODE_HVD;
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		case 3:	/* SYMBIOS controllers report HVD through GPIO3 */
 			if (INB(nc_gpreg) & 0x08)
 				break;
-			/* fall through */
+			fallthrough;
 		case 2:	/* Set HVD unconditionally */
 			np->scsi_mode = SMODE_HVD;
-			/* fall through */
+			fallthrough;
 		case 1:	/* Trust previous settings for HVD */
 			if (np->sv_stest2 & 0x20)
 				np->scsi_mode = SMODE_HVD;
@@ -4296,7 +4296,7 @@ static int ncr_queue_command (struct ncb *np, struct scsi_cmnd *cmd)
 			break;
 		cp->phys.header.wgoalp	= cpu_to_scr(goalp);
 		cp->phys.header.wlastp	= cpu_to_scr(lastp);
-		/* fall through */
+		fallthrough;
 	case DMA_FROM_DEVICE:
 		goalp = NCB_SCRIPT_PHYS (np, data_in2) + 8;
 		if (segments <= MAX_SCATTERL)
@@ -6717,7 +6717,7 @@ void ncr_int_sir (struct ncb *np)
 			OUTL_DSP (scr_to_cpu(tp->lp[0]->jump_ccb[0]));
 			return;
 		}
-		/* fall through */
+		fallthrough;
 	case SIR_RESEL_BAD_TARGET:	/* Will send a TARGET RESET message */
 	case SIR_RESEL_BAD_LUN:		/* Will send a TARGET RESET message */
 	case SIR_RESEL_BAD_I_T_L_Q:	/* Will send an ABORT TAG message   */
@@ -6825,7 +6825,7 @@ void ncr_int_sir (struct ncb *np)
 		*/
 		OUTB (HS_PRT, HS_BUSY);
 
-		/* fall through */
+		fallthrough;
 
 	case SIR_NEGO_PROTO:
 		/*-------------------------------------------------------
diff --git a/drivers/scsi/pcmcia/nsp_cs.c b/drivers/scsi/pcmcia/nsp_cs.c
index 8655ff1249bbc..bc5a623519e7b 100644
--- a/drivers/scsi/pcmcia/nsp_cs.c
+++ b/drivers/scsi/pcmcia/nsp_cs.c
@@ -1113,7 +1113,7 @@ static irqreturn_t nspintr(int irq, void *dev_id)
 			nsp_scsi_done(tmpSC);
 			return IRQ_HANDLED;
 		}
-		/* fall thru */
+		fallthrough;
 	default:
 		if ((irq_status & (IRQSTATUS_SCSI | IRQSTATUS_FIFO)) == 0) {
 			return IRQ_HANDLED;
diff --git a/drivers/scsi/ppa.c b/drivers/scsi/ppa.c
index 0ae800c5b7396..aa41f7ac91cb7 100644
--- a/drivers/scsi/ppa.c
+++ b/drivers/scsi/ppa.c
@@ -717,7 +717,7 @@ static int ppa_engine(ppa_struct *dev, struct scsi_cmnd *cmd)
 			}
 			cmd->SCp.phase++;
 		}
-		/* fall through */
+		fallthrough;
 
 	case 2:		/* Phase 2 - We are now talking to the scsi bus */
 		if (!ppa_select(dev, scmd_id(cmd))) {
@@ -725,7 +725,7 @@ static int ppa_engine(ppa_struct *dev, struct scsi_cmnd *cmd)
 			return 0;
 		}
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 3:		/* Phase 3 - Ready to accept a command */
 		w_ctr(ppb, 0x0c);
@@ -735,7 +735,7 @@ static int ppa_engine(ppa_struct *dev, struct scsi_cmnd *cmd)
 		if (!ppa_send_command(cmd))
 			return 0;
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 4:		/* Phase 4 - Setup scatter/gather buffers */
 		if (scsi_bufflen(cmd)) {
@@ -749,7 +749,7 @@ static int ppa_engine(ppa_struct *dev, struct scsi_cmnd *cmd)
 		}
 		cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1;
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 5:		/* Phase 5 - Data transfer stage */
 		w_ctr(ppb, 0x0c);
@@ -762,7 +762,7 @@ static int ppa_engine(ppa_struct *dev, struct scsi_cmnd *cmd)
 		if (retv == 0)
 			return 1;
 		cmd->SCp.phase++;
-		/* fall through */
+		fallthrough;
 
 	case 6:		/* Phase 6 - Read status/message */
 		cmd->result = DID_OK << 16;
diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index de9fd7f688d01..b569fd6e96d63 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -177,7 +177,7 @@ qla2x00_chk_ms_status(scsi_qla_host_t *vha, ms_iocb_entry_t *ms_pkt,
 			break;
 		case CS_TIMEOUT:
 			rval = QLA_FUNCTION_TIMEOUT;
-			/* fall through */
+			fallthrough;
 		default:
 			ql_dbg(ql_dbg_disc, vha, 0x2033,
 			    "%s failed, completion status (%x) on port_id: "
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 57a2d76aa691d..507919d4ab361 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -857,7 +857,7 @@ static void qla24xx_handle_gnl_done_event(scsi_qla_host_t *vha,
 					    fcport);
 					break;
 				}
-				/* fall through */
+				fallthrough;
 			default:
 				if (fcport_is_smaller(fcport)) {
 					/* local adapter is bigger */
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index e3d2dea0b057c..0954fa41911ca 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -2874,7 +2874,7 @@ static void qla2x00_els_dcmd2_sp_done(srb_t *sp, int res)
 					    &vha->dpc_flags);
 					qla2xxx_wake_dpc(vha);
 				}
-				/* fall through */
+				fallthrough;
 			default:
 				ql_dbg(ql_dbg_disc, vha, 0x20eb,
 				    "%s %8phC cmd error fw_status 0x%x 0x%x 0x%x\n",
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index ab5275dbc3389..25e0a16847632 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -1580,11 +1580,11 @@ qla2x00_async_event(scsi_qla_host_t *vha, struct rsp_que *rsp, uint16_t *mb)
 				qla2xxx_wake_dpc(vha);
 			}
 		}
-		/* fall through */
+		fallthrough;
 	case MBA_IDC_COMPLETE:
 		if (ha->notify_lb_portup_comp && !vha->vp_idx)
 			complete(&ha->lb_portup_comp);
-		/* Fallthru */
+		fallthrough;
 	case MBA_IDC_TIME_EXT:
 		if (IS_QLA81XX(vha->hw) || IS_QLA8031(vha->hw) ||
 		    IS_QLA8044(ha))
@@ -2188,7 +2188,7 @@ qla24xx_logio_entry(scsi_qla_host_t *vha, struct req_que *req,
 				set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
 			qla2xxx_wake_dpc(vha);
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		data[0] = MBS_COMMAND_ERROR;
 		break;
@@ -2368,7 +2368,7 @@ static void qla24xx_nvme_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
 	case CS_PORT_UNAVAILABLE:
 	case CS_PORT_LOGGED_OUT:
 		fcport->nvme_flag |= NVME_FLAG_RESETTING;
-		/* fall through */
+		fallthrough;
 	case CS_ABORTED:
 	case CS_PORT_BUSY:
 		fd->transferred_length = 0;
@@ -3485,7 +3485,7 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha,
 			} else {
 				qlt_24xx_process_atio_queue(vha, 1);
 			}
-			/* fall through */
+			fallthrough;
 		case ABTS_RESP_24XX:
 		case CTIO_TYPE7:
 		case CTIO_CRC2:
diff --git a/drivers/scsi/qla2xxx/qla_sup.c b/drivers/scsi/qla2xxx/qla_sup.c
index e161c05d7d826..411b8a9ff393b 100644
--- a/drivers/scsi/qla2xxx/qla_sup.c
+++ b/drivers/scsi/qla2xxx/qla_sup.c
@@ -2457,7 +2457,7 @@ qla2x00_write_optrom_data(struct scsi_qla_host *vha, void *buf,
 				sec_mask = 0x10000;
 				break;
 			}
-			/* Fall through... */
+			fallthrough;
 
 		case 0x1f: /* Atmel flash. */
 			/* 512k sector size. */
@@ -2466,7 +2466,7 @@ qla2x00_write_optrom_data(struct scsi_qla_host *vha, void *buf,
 				sec_mask =   0x80000000;
 				break;
 			}
-			/* Fall through... */
+			fallthrough;
 
 		case 0x01: /* AMD flash. */
 			if (flash_id == 0x38 || flash_id == 0x40 ||
@@ -2499,7 +2499,7 @@ qla2x00_write_optrom_data(struct scsi_qla_host *vha, void *buf,
 				sec_mask = 0x1e000;
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		default:
 			/* Default to 16 kb sector size. */
 			rest_addr = 0x3fff;
diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index 90289162dbd4c..2d445bdb21290 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -442,7 +442,7 @@ void qlt_response_pkt_all_vps(struct scsi_qla_host *vha,
 		ql_dbg(ql_dbg_tgt, vha, 0xe073,
 			"qla_target(%d):%s: CRC2 Response pkt\n",
 			vha->vp_idx, __func__);
-		/* fall through */
+		fallthrough;
 	case CTIO_TYPE7:
 	{
 		struct ctio7_from_24xx *entry = (struct ctio7_from_24xx *)pkt;
@@ -4423,7 +4423,7 @@ static int qlt_issue_task_mgmt(struct fc_port *sess, u64 lun,
 	case QLA_TGT_CLEAR_TS:
 	case QLA_TGT_ABORT_TS:
 		abort_cmds_for_lun(vha, lun, a->u.isp24.fcp_hdr.s_id);
-		/* fall through */
+		fallthrough;
 	case QLA_TGT_CLEAR_ACA:
 		h = qlt_find_qphint(vha, mcmd->unpacked_lun);
 		mcmd->qpair = h->qpair;
@@ -5057,7 +5057,7 @@ static int qlt_24xx_handle_els(struct scsi_qla_host *vha,
 			res = 1;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case ELS_LOGO:
 	case ELS_PRLO:
 		spin_lock_irqsave(&ha->tgt.sess_lock, flags);
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index bab87e47b238d..676778cbc5509 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -2907,7 +2907,7 @@ static int qla4xxx_session_get_param(struct iscsi_cls_session *cls_sess,
 						chap_tbl.secret_len);
 			}
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		return iscsi_session_get_param(cls_sess, param, buf);
 	}
diff --git a/drivers/scsi/qlogicpti.c b/drivers/scsi/qlogicpti.c
index 3790e8b70bba9..48ff7d88af860 100644
--- a/drivers/scsi/qlogicpti.c
+++ b/drivers/scsi/qlogicpti.c
@@ -200,15 +200,15 @@ static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int f
 	/* Write mailbox command registers. */
 	switch (mbox_param[param[0]] >> 4) {
 	case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
-		/* Fall through */
+		fallthrough;
 	case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
-		/* Fall through */
+		fallthrough;
 	case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
-		/* Fall through */
+		fallthrough;
 	case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
-		/* Fall through */
+		fallthrough;
 	case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
-		/* Fall through */
+		fallthrough;
 	case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
 	}
 
@@ -259,15 +259,15 @@ static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int f
 	/* Read back output parameters. */
 	switch (mbox_param[param[0]] & 0xf) {
 	case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
-		/* Fall through */
+		fallthrough;
 	case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
-		/* Fall through */
+		fallthrough;
 	case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
-		/* Fall through */
+		fallthrough;
 	case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
-		/* Fall through */
+		fallthrough;
 	case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
-		/* Fall through */
+		fallthrough;
 	case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
 	}
 
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 927b1e6418423..7d3571a2bd89b 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -599,7 +599,7 @@ int scsi_check_sense(struct scsi_cmnd *scmd)
 			set_host_byte(scmd, DID_ALLOC_FAILURE);
 			return SUCCESS;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case COPY_ABORTED:
 	case VOLUME_OVERFLOW:
 	case MISCOMPARE:
@@ -621,7 +621,7 @@ int scsi_check_sense(struct scsi_cmnd *scmd)
 			return ADD_TO_MLQUEUE;
 		else
 			set_host_byte(scmd, DID_TARGET_FAILURE);
-		/* FALLTHROUGH */
+		fallthrough;
 
 	case ILLEGAL_REQUEST:
 		if (sshdr.asc == 0x20 || /* Invalid command operation code */
@@ -734,7 +734,7 @@ static int scsi_eh_completed_normally(struct scsi_cmnd *scmd)
 	switch (status_byte(scmd->result)) {
 	case GOOD:
 		scsi_handle_queue_ramp_up(scmd->device);
-		/* FALLTHROUGH */
+		fallthrough;
 	case COMMAND_TERMINATED:
 		return SUCCESS;
 	case CHECK_CONDITION:
@@ -755,7 +755,7 @@ static int scsi_eh_completed_normally(struct scsi_cmnd *scmd)
 		return FAILED;
 	case QUEUE_FULL:
 		scsi_handle_queue_full(scmd->device);
-		/* fall through */
+		fallthrough;
 	case BUSY:
 		return NEEDS_RETRY;
 	default:
@@ -1302,7 +1302,7 @@ static int scsi_eh_tur(struct scsi_cmnd *scmd)
 	case NEEDS_RETRY:
 		if (retry_cnt--)
 			goto retry_tur;
-		/*FALLTHRU*/
+		fallthrough;
 	case SUCCESS:
 		return 0;
 	default:
@@ -1739,7 +1739,7 @@ int scsi_noretry_cmd(struct scsi_cmnd *scmd)
 		if (msg_byte(scmd->result) == COMMAND_COMPLETE &&
 		    status_byte(scmd->result) == RESERVATION_CONFLICT)
 			return 0;
-		/* fall through */
+		fallthrough;
 	case DID_SOFT_ERROR:
 		return (scmd->request->cmd_flags & REQ_FAILFAST_DRIVER);
 	}
@@ -1810,7 +1810,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd)
 			set_host_byte(scmd, DID_TIME_OUT);
 			return SUCCESS;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case DID_NO_CONNECT:
 	case DID_BAD_TARGET:
 		/*
@@ -1854,7 +1854,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd)
 			 * lower down
 			 */
 			break;
-		/* fallthrough */
+		fallthrough;
 	case DID_BUS_BUSY:
 	case DID_PARITY:
 		goto maybe_retry;
@@ -1892,7 +1892,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd)
 		 * the case of trying to send too many commands to a
 		 * tagged queueing device.
 		 */
-		/* FALLTHROUGH */
+		fallthrough;
 	case BUSY:
 		/*
 		 * device can't talk to us at the moment.  Should only
@@ -1905,7 +1905,7 @@ int scsi_decide_disposition(struct scsi_cmnd *scmd)
 		if (scmd->cmnd[0] == REPORT_LUNS)
 			scmd->device->sdev_target->expecting_lun_change = 0;
 		scsi_handle_queue_ramp_up(scmd->device);
-		/* FALLTHROUGH */
+		fallthrough;
 	case COMMAND_TERMINATED:
 		return SUCCESS;
 	case TASK_ABORTED:
@@ -2376,22 +2376,22 @@ scsi_ioctl_reset(struct scsi_device *dev, int __user *arg)
 		rtn = scsi_try_bus_device_reset(scmd);
 		if (rtn == SUCCESS || (val & SG_SCSI_RESET_NO_ESCALATE))
 			break;
-		/* FALLTHROUGH */
+		fallthrough;
 	case SG_SCSI_RESET_TARGET:
 		rtn = scsi_try_target_reset(scmd);
 		if (rtn == SUCCESS || (val & SG_SCSI_RESET_NO_ESCALATE))
 			break;
-		/* FALLTHROUGH */
+		fallthrough;
 	case SG_SCSI_RESET_BUS:
 		rtn = scsi_try_bus_reset(scmd);
 		if (rtn == SUCCESS || (val & SG_SCSI_RESET_NO_ESCALATE))
 			break;
-		/* FALLTHROUGH */
+		fallthrough;
 	case SG_SCSI_RESET_HOST:
 		rtn = scsi_try_host_reset(scmd);
 		if (rtn == SUCCESS)
 			break;
-		/* FALLTHROUGH */
+		fallthrough;
 	default:
 		rtn = FAILED;
 		break;
diff --git a/drivers/scsi/scsi_ioctl.c b/drivers/scsi/scsi_ioctl.c
index 45d04b7b26439..14872c9dc78cc 100644
--- a/drivers/scsi/scsi_ioctl.c
+++ b/drivers/scsi/scsi_ioctl.c
@@ -117,14 +117,14 @@ static int ioctl_internal_command(struct scsi_device *sdev, char *cmd,
 		case NOT_READY:	/* This happens if there is no disc in drive */
 			if (sdev->removable)
 				break;
-			/* FALLTHROUGH */
+			fallthrough;
 		case UNIT_ATTENTION:
 			if (sdev->removable) {
 				sdev->changed = 1;
 				result = 0;	/* This is no longer considered an error */
 				break;
 			}
-			/* FALLTHROUGH -- for non-removable media */
+			fallthrough;	/* for non-removable media */
 		default:
 			sdev_printk(KERN_INFO, sdev,
 				    "ioctl_internal_command return code = %x\n",
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 7c6dd6f751907..7affaaf8b98e0 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -795,7 +795,7 @@ static void scsi_io_completion_action(struct scsi_cmnd *cmd, int result)
 		}
 		if (!scsi_end_request(req, blk_stat, blk_rq_err_bytes(req)))
 			return;
-		/*FALLTHRU*/
+		fallthrough;
 	case ACTION_REPREP:
 		scsi_io_completion_reprep(cmd, q);
 		break;
diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c
index bd38c8cea56e1..ca1e6cf6a38ef 100644
--- a/drivers/scsi/smartpqi/smartpqi_init.c
+++ b/drivers/scsi/smartpqi/smartpqi_init.c
@@ -516,7 +516,7 @@ static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 		break;
 	case BMIC_SENSE_DIAG_OPTIONS:
 		cdb_length = 0;
-		/* fall through */
+		fallthrough;
 	case BMIC_IDENTIFY_CONTROLLER:
 	case BMIC_IDENTIFY_PHYSICAL_DEVICE:
 	case BMIC_SENSE_SUBSYSTEM_INFORMATION:
@@ -527,7 +527,7 @@ static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info,
 		break;
 	case BMIC_SET_DIAG_OPTIONS:
 		cdb_length = 0;
-		/* fall through */
+		fallthrough;
 	case BMIC_WRITE_HOST_WELLNESS:
 		request->data_direction = SOP_WRITE_FLAG;
 		cdb[0] = BMIC_WRITE;
@@ -2324,7 +2324,7 @@ static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
 	switch (scmd->cmnd[0]) {
 	case WRITE_6:
 		is_write = true;
-		/* fall through */
+		fallthrough;
 	case READ_6:
 		first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) |
 			(scmd->cmnd[2] << 8) | scmd->cmnd[3]);
@@ -2334,21 +2334,21 @@ static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info,
 		break;
 	case WRITE_10:
 		is_write = true;
-		/* fall through */
+		fallthrough;
 	case READ_10:
 		first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
 		block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]);
 		break;
 	case WRITE_12:
 		is_write = true;
-		/* fall through */
+		fallthrough;
 	case READ_12:
 		first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]);
 		block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
 		break;
 	case WRITE_16:
 		is_write = true;
-		/* fall through */
+		fallthrough;
 	case READ_16:
 		first_block = get_unaligned_be64(&scmd->cmnd[2]);
 		block_cnt = get_unaligned_be32(&scmd->cmnd[10]);
@@ -2948,7 +2948,7 @@ static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
 		case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
 			if (io_request->scmd)
 				io_request->scmd->result = 0;
-			/* fall through */
+			fallthrough;
 		case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
 			break;
 		case PQI_RESPONSE_IU_VENDOR_GENERAL:
@@ -3115,12 +3115,11 @@ static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info,
 
 	switch (reset_status) {
 	case RESET_INITIATE_DRIVER:
-		/* fall through */
 	case RESET_TIMEDOUT:
 		dev_info(&ctrl_info->pci_dev->dev,
 			"resetting controller %u\n", ctrl_info->ctrl_id);
 		sis_soft_reset(ctrl_info);
-		/* fall through */
+		fallthrough;
 	case RESET_INITIATE_FIRMWARE:
 		rc = pqi_ofa_ctrl_restart(ctrl_info);
 		pqi_ofa_free_host_buffer(ctrl_info);
diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c
index 0c4aa4665a2f9..3b3a53c6a0de5 100644
--- a/drivers/scsi/sr.c
+++ b/drivers/scsi/sr.c
@@ -877,10 +877,10 @@ static void get_sectorsize(struct scsi_cd *cd)
 		case 2340:
 		case 2352:
 			sector_size = 2048;
-			/* fall through */
+			fallthrough;
 		case 2048:
 			cd->capacity *= 4;
-			/* fall through */
+			fallthrough;
 		case 512:
 			break;
 		default:
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 87fbc0ea350b1..e2e5356a997de 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -339,14 +339,14 @@ static void st_analyze_sense(struct st_request *SRpnt, struct st_cmdstatus *s)
 		switch (sense[0] & 0x7f) {
 		case 0x71:
 			s->deferred = 1;
-			/* fall through */
+			fallthrough;
 		case 0x70:
 			s->fixed_format = 1;
 			s->flags = sense[2] & 0xe0;
 			break;
 		case 0x73:
 			s->deferred = 1;
-			/* fall through */
+			fallthrough;
 		case 0x72:
 			s->fixed_format = 0;
 			ucp = scsi_sense_desc_find(sense, SCSI_SENSE_BUFFERSIZE, 4);
@@ -2723,7 +2723,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
 	switch (cmd_in) {
 	case MTFSFM:
 		chg_eof = 0;	/* Changed from the FSF after this */
-		/* fall through */
+		fallthrough;
 	case MTFSF:
 		cmd[0] = SPACE;
 		cmd[1] = 0x01;	/* Space FileMarks */
@@ -2738,7 +2738,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
 		break;
 	case MTBSFM:
 		chg_eof = 0;	/* Changed from the FSF after this */
-		/* fall through */
+		fallthrough;
 	case MTBSF:
 		cmd[0] = SPACE;
 		cmd[1] = 0x01;	/* Space FileMarks */
diff --git a/drivers/scsi/sun3_scsi.c b/drivers/scsi/sun3_scsi.c
index 701b842296f05..2e3fbc2fae976 100644
--- a/drivers/scsi/sun3_scsi.c
+++ b/drivers/scsi/sun3_scsi.c
@@ -397,12 +397,12 @@ static int sun3scsi_dma_finish(int write_flag)
 		case CSR_LEFT_3:
 			*vaddr = (dregs->bpack_lo & 0xff00) >> 8;
 			vaddr--;
-			/* Fall through */
+			fallthrough;
 
 		case CSR_LEFT_2:
 			*vaddr = (dregs->bpack_hi & 0x00ff);
 			vaddr--;
-			/* Fall through */
+			fallthrough;
 
 		case CSR_LEFT_1:
 			*vaddr = (dregs->bpack_hi & 0xff00) >> 8;
diff --git a/drivers/scsi/sym53c8xx_2/sym_fw.c b/drivers/scsi/sym53c8xx_2/sym_fw.c
index 6d7651a7847e8..c6db61b61de3a 100644
--- a/drivers/scsi/sym53c8xx_2/sym_fw.c
+++ b/drivers/scsi/sym53c8xx_2/sym_fw.c
@@ -523,7 +523,7 @@ void sym_fw_bind_script(struct sym_hcb *np, u32 *start, int len)
 					new = old;
 					break;
 				}
-				/* fall through */
+				fallthrough;
 			default:
 				new = 0;
 				panic("sym_fw_bind_script: "
diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c
index 8410117d5aa44..cc11daa1222b1 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
@@ -3059,7 +3059,7 @@ static void sym_sir_bad_scsi_status(struct sym_hcb *np, int num, struct sym_ccb
 			sym_print_addr(cp->cmd, "%s\n",
 			        s_status == S_BUSY ? "BUSY" : "QUEUE FULL\n");
 		}
-		/* fall through */
+		fallthrough;
 	default:	/* S_INT, S_INT_COND_MET, S_CONFLICT */
 		sym_complete_error (np, cp);
 		break;
@@ -4620,7 +4620,7 @@ static void sym_int_sir(struct sym_hcb *np)
 	 *  Negotiation failed.
 	 *  Target does not want answer message.
 	 */
-	/* fall through */
+		fallthrough;
 	case SIR_NEGO_PROTO:
 		sym_nego_default(np, tp, cp);
 		goto out;
diff --git a/drivers/scsi/sym53c8xx_2/sym_nvram.c b/drivers/scsi/sym53c8xx_2/sym_nvram.c
index d37e2a69136ad..e13d5351f155f 100644
--- a/drivers/scsi/sym53c8xx_2/sym_nvram.c
+++ b/drivers/scsi/sym53c8xx_2/sym_nvram.c
@@ -695,7 +695,7 @@ static int sym_read_Tekram_nvram (struct sym_device *np, Tekram_nvram *nvram)
 					  data, len);
 		if (!x)
 			break;
-		/* fall through */
+		fallthrough;
 	default:
 		x = sym_read_T93C46_nvram(np, nvram);
 		break;
diff --git a/drivers/scsi/ufs/ufs_bsg.c b/drivers/scsi/ufs/ufs_bsg.c
index bcfbbd0d5c456..5b2bc1a6f9226 100644
--- a/drivers/scsi/ufs/ufs_bsg.c
+++ b/drivers/scsi/ufs/ufs_bsg.c
@@ -110,7 +110,7 @@ static int ufs_bsg_request(struct bsg_job *job)
 			goto out;
 		}
 
-		/* fall through */
+		fallthrough;
 	case UPIU_TRANSACTION_NOP_OUT:
 	case UPIU_TRANSACTION_TASK_REQ:
 		ret = ufshcd_exec_raw_upiu_cmd(hba, &bsg_request->upiu_req,
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index da199fa7a3e07..1d157ff58d817 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1612,7 +1612,7 @@ int ufshcd_hold(struct ufs_hba *hba, bool async)
 		 * currently running. Hence, fall through to cancel gating
 		 * work and to enable clocks.
 		 */
-		/* fallthrough */
+		fallthrough;
 	case CLKS_OFF:
 		ufshcd_scsi_block_requests(hba);
 		hba->clk_gating.state = REQ_CLKS_ON;
@@ -1624,7 +1624,7 @@ int ufshcd_hold(struct ufs_hba *hba, bool async)
 		 * fall through to check if we should wait for this
 		 * work to be done or not.
 		 */
-		/* fallthrough */
+		fallthrough;
 	case REQ_CLKS_ON:
 		if (async) {
 			rc = -EAGAIN;
@@ -4737,7 +4737,7 @@ ufshcd_scsi_cmd_status(struct ufshcd_lrb *lrbp, int scsi_status)
 	switch (scsi_status) {
 	case SAM_STAT_CHECK_CONDITION:
 		ufshcd_copy_sense_data(lrbp);
-		/* fallthrough */
+		fallthrough;
 	case SAM_STAT_GOOD:
 		result |= DID_OK << 16 |
 			  COMMAND_COMPLETE << 8 |
@@ -6277,7 +6277,7 @@ int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba,
 	switch (msgcode) {
 	case UPIU_TRANSACTION_NOP_OUT:
 		cmd_type = DEV_CMD_TYPE_NOP;
-		/* fall through */
+		fallthrough;
 	case UPIU_TRANSACTION_QUERY_REQ:
 		ufshcd_hold(hba, false);
 		mutex_lock(&hba->dev_cmd.lock);
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index ca1c39b6f631f..3b18034320903 100644
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -148,7 +148,7 @@ static void virtscsi_complete_cmd(struct virtio_scsi *vscsi, void *buf)
 	default:
 		scmd_printk(KERN_WARNING, sc, "Unknown response %d",
 			    resp->response);
-		/* fall through */
+		fallthrough;
 	case VIRTIO_SCSI_S_FAILURE:
 		set_host_byte(sc, DID_ERROR);
 		break;
diff --git a/drivers/scsi/vmw_pvscsi.c b/drivers/scsi/vmw_pvscsi.c
index 8dbb4db6831af..081f54ab7d86c 100644
--- a/drivers/scsi/vmw_pvscsi.c
+++ b/drivers/scsi/vmw_pvscsi.c
@@ -607,7 +607,7 @@ static void pvscsi_complete_request(struct pvscsi_adapter *adapter,
 		case BTSTAT_TAGREJECT:
 		case BTSTAT_BADMSG:
 			cmd->result = (DRIVER_INVALID << 24);
-			/* fall through */
+			fallthrough;
 
 		case BTSTAT_HAHARDWARE:
 		case BTSTAT_INVPHASE:
diff --git a/drivers/scsi/wd33c93.c b/drivers/scsi/wd33c93.c
index f81046f0e68a6..87dafbc942d37 100644
--- a/drivers/scsi/wd33c93.c
+++ b/drivers/scsi/wd33c93.c
@@ -1854,7 +1854,7 @@ round_4(unsigned int x)
 		case 1: --x;
 			break;
 		case 2: ++x;
-			/* fall through */
+			fallthrough;
 		case 3: ++x;
 	}
 	return x;
diff --git a/drivers/scsi/xen-scsifront.c b/drivers/scsi/xen-scsifront.c
index f0068e96a177f..259fc248d06cf 100644
--- a/drivers/scsi/xen-scsifront.c
+++ b/drivers/scsi/xen-scsifront.c
@@ -1111,7 +1111,7 @@ static void scsifront_backend_changed(struct xenbus_device *dev,
 	case XenbusStateClosed:
 		if (dev->state == XenbusStateClosed)
 			break;
-		/* fall through - Missed the backend's Closing state */
+		fallthrough;	/* Missed the backend's Closing state */
 	case XenbusStateClosing:
 		scsifront_disconnect(info);
 		break;
diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
index e19102f463027..b25d0f7dac9e8 100644
--- a/drivers/soc/qcom/socinfo.c
+++ b/drivers/soc/qcom/socinfo.c
@@ -353,7 +353,7 @@ static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
 
 		debugfs_create_u32("nmodem_supported", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.nmodem_supported);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 14):
 		qcom_socinfo->info.num_clusters = __le32_to_cpu(info->num_clusters);
 		qcom_socinfo->info.ncluster_array_offset = __le32_to_cpu(info->ncluster_array_offset);
@@ -368,14 +368,14 @@ static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
 				   &qcom_socinfo->info.num_defective_parts);
 		debugfs_create_u32("ndefective_parts_array_offset", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.ndefective_parts_array_offset);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 13):
 		qcom_socinfo->info.nproduct_id = __le32_to_cpu(info->nproduct_id);
 
 		debugfs_create_u32("nproduct_id", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.nproduct_id);
 		DEBUGFS_ADD(info, chip_id);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 12):
 		qcom_socinfo->info.chip_family =
 			__le32_to_cpu(info->chip_family);
@@ -392,7 +392,7 @@ static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
 		debugfs_create_x32("raw_device_number", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.raw_device_num);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 11):
 	case SOCINFO_VERSION(0, 10):
 	case SOCINFO_VERSION(0, 9):
@@ -400,12 +400,12 @@ static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
 
 		debugfs_create_u32("foundry_id", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.foundry_id);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 8):
 	case SOCINFO_VERSION(0, 7):
 		DEBUGFS_ADD(info, pmic_model);
 		DEBUGFS_ADD(info, pmic_die_rev);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 6):
 		qcom_socinfo->info.hw_plat_subtype =
 			__le32_to_cpu(info->hw_plat_subtype);
@@ -413,7 +413,7 @@ static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
 		debugfs_create_u32("hardware_platform_subtype", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.hw_plat_subtype);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 5):
 		qcom_socinfo->info.accessory_chip =
 			__le32_to_cpu(info->accessory_chip);
@@ -421,27 +421,27 @@ static void socinfo_debugfs_init(struct qcom_socinfo *qcom_socinfo,
 		debugfs_create_u32("accessory_chip", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.accessory_chip);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 4):
 		qcom_socinfo->info.plat_ver = __le32_to_cpu(info->plat_ver);
 
 		debugfs_create_u32("platform_version", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.plat_ver);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 3):
 		qcom_socinfo->info.hw_plat = __le32_to_cpu(info->hw_plat);
 
 		debugfs_create_u32("hardware_platform", 0400,
 				   qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.hw_plat);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 2):
 		qcom_socinfo->info.raw_ver  = __le32_to_cpu(info->raw_ver);
 
 		debugfs_create_u32("raw_version", 0400, qcom_socinfo->dbg_root,
 				   &qcom_socinfo->info.raw_ver);
-		/* Fall through */
+		fallthrough;
 	case SOCINFO_VERSION(0, 1):
 		DEBUGFS_ADD(info, build_id);
 		break;
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index 42cf37a0556b3..d332e5d9abac4 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -2229,7 +2229,7 @@ static int tegra_pmc_clk_notify_cb(struct notifier_block *nb,
 
 	case POST_RATE_CHANGE:
 		pmc->rate = data->new_rate;
-		/* fall through */
+		fallthrough;
 
 	case ABORT_RATE_CHANGE:
 		mutex_unlock(&pmc->powergates_lock);
diff --git a/drivers/spi/spi-bcm2835aux.c b/drivers/spi/spi-bcm2835aux.c
index 2f717812c7661..03b034c15d2be 100644
--- a/drivers/spi/spi-bcm2835aux.c
+++ b/drivers/spi/spi-bcm2835aux.c
@@ -164,10 +164,10 @@ static inline void bcm2835aux_rd_fifo(struct bcm2835aux_spi *bs)
 		switch (count) {
 		case 3:
 			*bs->rx_buf++ = (data >> 16) & 0xff;
-			/* fallthrough */
+			fallthrough;
 		case 2:
 			*bs->rx_buf++ = (data >> 8) & 0xff;
-			/* fallthrough */
+			fallthrough;
 		case 1:
 			*bs->rx_buf++ = (data >> 0) & 0xff;
 			/* fallthrough - no default */
diff --git a/drivers/spi/spi-fsl-cpm.c b/drivers/spi/spi-fsl-cpm.c
index 54ad0ac121e5b..ee905880769e6 100644
--- a/drivers/spi/spi-fsl-cpm.c
+++ b/drivers/spi/spi-fsl-cpm.c
@@ -226,7 +226,7 @@ static void fsl_spi_free_dummy_rx(void)
 	case 1:
 		kfree(fsl_dummy_rx);
 		fsl_dummy_rx = NULL;
-		/* fall through */
+		fallthrough;
 	default:
 		fsl_dummy_rx_refcnt--;
 		break;
@@ -294,7 +294,7 @@ int fsl_spi_cpm_init(struct mpc8xxx_spi *mspi)
 		switch (mspi->subblock) {
 		default:
 			dev_warn(dev, "cell-index unspecified, assuming SPI1\n");
-			/* fall through */
+			fallthrough;
 		case 0:
 			mspi->subblock = QE_CR_SUBBLOCK_SPI1;
 			break;
diff --git a/drivers/spi/spi-sprd-adi.c b/drivers/spi/spi-sprd-adi.c
index bd23c4689b463..127b8bd258312 100644
--- a/drivers/spi/spi-sprd-adi.c
+++ b/drivers/spi/spi-sprd-adi.c
@@ -506,7 +506,7 @@ static int sprd_adi_probe(struct platform_device *pdev)
 		default:
 			dev_err(&pdev->dev,
 				"failed to find hwlock id, %d\n", ret);
-			/* fall-through */
+			fallthrough;
 		case -EPROBE_DEFER:
 			goto put_ctlr;
 		}
diff --git a/drivers/ssb/driver_chipcommon.c b/drivers/ssb/driver_chipcommon.c
index 823dc99be46f1..a8d2525e7af9e 100644
--- a/drivers/ssb/driver_chipcommon.c
+++ b/drivers/ssb/driver_chipcommon.c
@@ -425,7 +425,7 @@ void ssb_chipco_get_clockcontrol(struct ssb_chipcommon *cc,
 			*m = chipco_read32(cc, SSB_CHIPCO_CLOCK_M2);
 			break;
 		}
-		/* Fall through */
+		fallthrough;
 	default:
 		*m = chipco_read32(cc, SSB_CHIPCO_CLOCK_SB);
 	}
diff --git a/drivers/ssb/driver_mipscore.c b/drivers/ssb/driver_mipscore.c
index 1ca2ac5ef2b80..354486b7ed3a7 100644
--- a/drivers/ssb/driver_mipscore.c
+++ b/drivers/ssb/driver_mipscore.c
@@ -342,7 +342,7 @@ void ssb_mipscore_init(struct ssb_mipscore *mcore)
 				set_irq(dev, irq++);
 				break;
 			}
-			/* fallthrough */
+			fallthrough;
 		case SSB_DEV_EXTIF:
 			set_irq(dev, 0);
 			break;
diff --git a/drivers/ssb/scan.c b/drivers/ssb/scan.c
index b97a5c32d44ab..f49ab1aa2149a 100644
--- a/drivers/ssb/scan.c
+++ b/drivers/ssb/scan.c
@@ -228,7 +228,7 @@ static void __iomem *ssb_ioremap(struct ssb_bus *bus,
 	switch (bus->bustype) {
 	case SSB_BUSTYPE_SSB:
 		/* Only map the first core for now. */
-		/* fallthrough... */
+		fallthrough;
 	case SSB_BUSTYPE_PCMCIA:
 		mmio = ioremap(baseaddr, SSB_CORE_SIZE);
 		break;
diff --git a/drivers/staging/media/atomisp/pci/atomisp_cmd.c b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
index 8ea65bef35d24..a4e4eef55f352 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_cmd.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_cmd.c
@@ -4984,7 +4984,7 @@ enum mipi_port_id __get_mipi_port(struct atomisp_device *isp,
 		if (MIPI_PORT1_ID + 1 != N_MIPI_PORT_ID) {
 			return MIPI_PORT1_ID + 1;
 		}
-	/* fall through */
+		fallthrough;
 	default:
 		dev_err(isp->dev, "unsupported port: %d\n", port);
 		return MIPI_PORT0_ID;
diff --git a/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c b/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c
index cccc5bfa10573..1b2b2c68025b4 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_compat_css20.c
@@ -704,14 +704,14 @@ static bool is_pipe_valid_to_current_run_mode(struct atomisp_sub_device *asd,
 
 			return false;
 		}
-	/* fall-through */
+		fallthrough;
 	case ATOMISP_RUN_MODE_CONTINUOUS_CAPTURE:
 		if (pipe_id == IA_CSS_PIPE_ID_CAPTURE ||
 		    pipe_id == IA_CSS_PIPE_ID_PREVIEW)
 			return true;
 
 		return false;
-	/* fall-through */
+		fallthrough;
 	case ATOMISP_RUN_MODE_VIDEO:
 		if (!asd->continuous_mode->val) {
 			if (pipe_id == IA_CSS_PIPE_ID_VIDEO ||
@@ -720,7 +720,7 @@ static bool is_pipe_valid_to_current_run_mode(struct atomisp_sub_device *asd,
 			else
 				return false;
 		}
-	/* fall through  */
+		fallthrough;
 	case ATOMISP_RUN_MODE_SDV:
 		if (pipe_id == IA_CSS_PIPE_ID_CAPTURE ||
 		    pipe_id == IA_CSS_PIPE_ID_VIDEO)
@@ -2765,7 +2765,7 @@ static unsigned int atomisp_get_pipe_index(struct atomisp_sub_device *asd,
 		if (!atomisp_is_mbuscode_raw(asd->fmt[asd->capture_pad].fmt.code)) {
 			return IA_CSS_PIPE_ID_CAPTURE;
 		}
-		/* fall through */
+		fallthrough;
 	case ATOMISP_SUBDEV_PAD_SOURCE_PREVIEW:
 		if (asd->yuvpp_mode)
 			return IA_CSS_PIPE_ID_YUVPP;
diff --git a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c
index f8d616f08b510..65b0c8a662a06 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c
@@ -1467,7 +1467,6 @@ enum ia_css_pipe_id atomisp_get_css_pipe_id(struct atomisp_sub_device *asd)
 	case ATOMISP_RUN_MODE_VIDEO:
 		return IA_CSS_PIPE_ID_VIDEO;
 	case ATOMISP_RUN_MODE_STILL_CAPTURE:
-	/* fall through */
 	default:
 		return IA_CSS_PIPE_ID_CAPTURE;
 	}
diff --git a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c
index a000a1e316f78..0114b040247b9 100644
--- a/drivers/staging/media/atomisp/pci/atomisp_v4l2.c
+++ b/drivers/staging/media/atomisp/pci/atomisp_v4l2.c
@@ -1086,7 +1086,7 @@ static int atomisp_subdev_probe(struct atomisp_device *isp)
 		case RAW_CAMERA:
 			dev_dbg(isp->dev, "raw_index: %d\n", raw_index);
 			raw_index = isp->input_cnt;
-			/* fall through */
+			fallthrough;
 		case SOC_CAMERA:
 			dev_dbg(isp->dev, "SOC_INDEX: %d\n", isp->input_cnt);
 			if (isp->input_cnt >= ATOM_ISP_MAX_INPUTS) {
diff --git a/drivers/staging/media/atomisp/pci/hmm/hmm_bo.c b/drivers/staging/media/atomisp/pci/hmm/hmm_bo.c
index 4fb9bfdd2f4ce..f13af2329f486 100644
--- a/drivers/staging/media/atomisp/pci/hmm/hmm_bo.c
+++ b/drivers/staging/media/atomisp/pci/hmm/hmm_bo.c
@@ -660,7 +660,7 @@ static void free_private_bo_pages(struct hmm_buffer_object *bo,
 				break;
 			}
 
-			/* fall through */
+			fallthrough;
 
 		/*
 		 * if dynamic memory pool doesn't exist, need to free
diff --git a/drivers/staging/media/atomisp/pci/sh_css.c b/drivers/staging/media/atomisp/pci/sh_css.c
index 54434c2dbaf90..a68cbb4995f0f 100644
--- a/drivers/staging/media/atomisp/pci/sh_css.c
+++ b/drivers/staging/media/atomisp/pci/sh_css.c
@@ -4510,7 +4510,7 @@ ia_css_pipe_dequeue_buffer(struct ia_css_pipe *pipe,
 #endif
 					pipe->stop_requested = false;
 				}
-				/* fall through */
+				fallthrough;
 			case IA_CSS_BUFFER_TYPE_VF_OUTPUT_FRAME:
 			case IA_CSS_BUFFER_TYPE_SEC_VF_OUTPUT_FRAME:
 				frame = (struct ia_css_frame *)HOST_ADDRESS(ddr_buffer.kernel_ptr);
diff --git a/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c b/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
index 24041849384a4..6386a3989bfe9 100644
--- a/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
+++ b/drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
@@ -110,7 +110,7 @@ hantro_g1_mpeg2_dec_set_buffers(struct hantro_dev *vpu, struct hantro_ctx *ctx,
 	case V4L2_MPEG2_PICTURE_CODING_TYPE_B:
 		backward_addr = hantro_get_ref(ctx,
 					       slice_params->backward_ref_ts);
-		/* fall-through */
+		fallthrough;
 	case V4L2_MPEG2_PICTURE_CODING_TYPE_P:
 		forward_addr = hantro_get_ref(ctx,
 					      slice_params->forward_ref_ts);
diff --git a/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c b/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
index 7e9aad6714896..f610fa5b43354 100644
--- a/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
+++ b/drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
@@ -112,7 +112,7 @@ rk3399_vpu_mpeg2_dec_set_buffers(struct hantro_dev *vpu,
 	case V4L2_MPEG2_PICTURE_CODING_TYPE_B:
 		backward_addr = hantro_get_ref(ctx,
 					       slice_params->backward_ref_ts);
-		/* fall-through */
+		fallthrough;
 	case V4L2_MPEG2_PICTURE_CODING_TYPE_P:
 		forward_addr = hantro_get_ref(ctx,
 					      slice_params->forward_ref_ts);
diff --git a/drivers/staging/media/imx/imx-media-csi.c b/drivers/staging/media/imx/imx-media-csi.c
index d92fd804488e9..21ebf77696964 100644
--- a/drivers/staging/media/imx/imx-media-csi.c
+++ b/drivers/staging/media/imx/imx-media-csi.c
@@ -488,7 +488,7 @@ static int csi_idmac_setup_channel(struct csi_priv *priv)
 			passthrough_cycles = incc->cycles;
 			break;
 		}
-		/* fallthrough - non-passthrough RGB565 (CSI-2 bus) */
+		fallthrough;	/* non-passthrough RGB565 (CSI-2 bus) */
 	default:
 		burst_size = (image.pix.width & 0xf) ? 8 : 16;
 		passthrough_bits = 16;
diff --git a/drivers/staging/media/usbvision/usbvision-i2c.c b/drivers/staging/media/usbvision/usbvision-i2c.c
index 6e4df3335b1be..aa3ff67a3cb1d 100644
--- a/drivers/staging/media/usbvision/usbvision-i2c.c
+++ b/drivers/staging/media/usbvision/usbvision-i2c.c
@@ -303,13 +303,13 @@ usbvision_i2c_read_max4(struct usb_usbvision *usbvision, unsigned char addr,
 	switch (len) {
 	case 4:
 		buf[3] = usbvision_read_reg(usbvision, USBVISION_SER_DAT4);
-		/* fall through */
+		fallthrough;
 	case 3:
 		buf[2] = usbvision_read_reg(usbvision, USBVISION_SER_DAT3);
-		/* fall through */
+		fallthrough;
 	case 2:
 		buf[1] = usbvision_read_reg(usbvision, USBVISION_SER_DAT2);
-		/* fall through */
+		fallthrough;
 	case 1:
 		buf[0] = usbvision_read_reg(usbvision, USBVISION_SER_DAT1);
 		break;
diff --git a/drivers/target/iscsi/cxgbit/cxgbit_main.c b/drivers/target/iscsi/cxgbit/cxgbit_main.c
index 30ea37e1a3f5e..bd37f2afadeaf 100644
--- a/drivers/target/iscsi/cxgbit/cxgbit_main.c
+++ b/drivers/target/iscsi/cxgbit/cxgbit_main.c
@@ -444,7 +444,7 @@ cxgbit_uld_lro_rx_handler(void *hndl, const __be64 *rsp,
 	case CPL_RX_ISCSI_DDP:
 	case CPL_FW4_ACK:
 		lro_flush = false;
-		/* fall through */
+		fallthrough;
 	case CPL_ABORT_RPL_RSS:
 	case CPL_PASS_ESTABLISH:
 	case CPL_PEER_CLOSE:
diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index c9689610e186d..cd045dc75a58c 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -3740,7 +3740,7 @@ iscsit_response_queue(struct iscsi_conn *conn, struct iscsi_cmd *cmd, int state)
 	case ISTATE_SEND_LOGOUTRSP:
 		if (!iscsit_logout_post_handler(cmd, conn))
 			return -ECONNRESET;
-		/* fall through */
+		fallthrough;
 	case ISTATE_SEND_STATUS:
 	case ISTATE_SEND_ASYNCMSG:
 	case ISTATE_SEND_NOPIN:
diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c
index 8fc88654bff63..5f79ea05f9b81 100644
--- a/drivers/target/target_core_pr.c
+++ b/drivers/target/target_core_pr.c
@@ -345,7 +345,7 @@ static int core_scsi3_pr_seq_non_holder(struct se_cmd *cmd, u32 pr_reg_type,
 		break;
 	case PR_TYPE_WRITE_EXCLUSIVE_REGONLY:
 		we = 1;
-		/* fall through */
+		fallthrough;
 	case PR_TYPE_EXCLUSIVE_ACCESS_REGONLY:
 		/*
 		 * Some commands are only allowed for registered I_T Nexuses.
@@ -354,7 +354,7 @@ static int core_scsi3_pr_seq_non_holder(struct se_cmd *cmd, u32 pr_reg_type,
 		break;
 	case PR_TYPE_WRITE_EXCLUSIVE_ALLREG:
 		we = 1;
-		/* fall through */
+		fallthrough;
 	case PR_TYPE_EXCLUSIVE_ACCESS_ALLREG:
 		/*
 		 * Each registered I_T Nexus is a reservation holder.
diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c
index f1e81886122d0..6e8b8d30938f6 100644
--- a/drivers/target/target_core_sbc.c
+++ b/drivers/target/target_core_sbc.c
@@ -734,7 +734,7 @@ sbc_check_prot(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb,
 		}
 		if (!protect)
 			return TCM_NO_SENSE;
-		/* Fallthrough */
+		fallthrough;
 	default:
 		pr_err("Unable to determine pi_prot_type for CDB: 0x%02x "
 		       "PROTECT: 0x%02x\n", cdb[0], protect);
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c
index 9fb0be0aa6204..590eac2df9090 100644
--- a/drivers/target/target_core_transport.c
+++ b/drivers/target/target_core_transport.c
@@ -2236,7 +2236,7 @@ static void transport_complete_qf(struct se_cmd *cmd)
 			ret = cmd->se_tfo->queue_data_in(cmd);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case DMA_NONE:
 queue_status:
 		trace_target_cmd_complete(cmd);
@@ -2431,7 +2431,7 @@ static void target_complete_ok_work(struct work_struct *work)
 				goto queue_full;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case DMA_NONE:
 queue_status:
 		trace_target_cmd_complete(cmd);
diff --git a/drivers/target/tcm_fc/tfc_cmd.c b/drivers/target/tcm_fc/tfc_cmd.c
index e9f0dda5ff92b..a7ed56602c6cd 100644
--- a/drivers/target/tcm_fc/tfc_cmd.c
+++ b/drivers/target/tcm_fc/tfc_cmd.c
@@ -537,7 +537,7 @@ static void ft_send_work(struct work_struct *work)
 	case FCP_PTA_ACA:
 		task_attr = TCM_ACA_TAG;
 		break;
-	case FCP_PTA_SIMPLE: /* Fallthrough */
+	case FCP_PTA_SIMPLE:
 	default:
 		task_attr = TCM_SIMPLE_TAG;
 	}
diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c
index e64db5f80d909..4ffa2e2c01457 100644
--- a/drivers/thermal/qcom/tsens-v0_1.c
+++ b/drivers/thermal/qcom/tsens-v0_1.c
@@ -220,7 +220,7 @@ static int calibrate_8916(struct tsens_priv *priv)
 		p2[4] = (qfprom_cdata[1] & MSM8916_S4_P2_MASK) >> MSM8916_S4_P2_SHIFT;
 		for (i = 0; i < priv->num_sensors; i++)
 			p2[i] = ((base1 + p2[i]) << 3);
-		/* Fall through */
+		fallthrough;
 	case ONE_PT_CALIB2:
 		base0 = (qfprom_cdata[0] & MSM8916_BASE0_MASK);
 		p1[0] = (qfprom_cdata[0] & MSM8916_S0_P1_MASK) >> MSM8916_S0_P1_SHIFT;
@@ -355,7 +355,7 @@ static int calibrate_8974(struct tsens_priv *priv)
 			p2[8] = (calib[5] & S8_P2_BKP_MASK) >> S8_P2_BKP_SHIFT;
 			p2[9] = (calib[5] & S9_P2_BKP_MASK) >> S9_P2_BKP_SHIFT;
 			p2[10] = (calib[5] & S10_P2_BKP_MASK) >> S10_P2_BKP_SHIFT;
-			/* Fall through */
+			fallthrough;
 		case ONE_PT_CALIB:
 		case ONE_PT_CALIB2:
 			base1 = bkp[0] & BASE1_MASK;
@@ -390,7 +390,7 @@ static int calibrate_8974(struct tsens_priv *priv)
 			p2[8] = (calib[4] & S8_P2_MASK) >> S8_P2_SHIFT;
 			p2[9] = (calib[4] & S9_P2_MASK) >> S9_P2_SHIFT;
 			p2[10] = (calib[4] & S10_P2_MASK) >> S10_P2_SHIFT;
-			/* Fall through */
+			fallthrough;
 		case ONE_PT_CALIB:
 		case ONE_PT_CALIB2:
 			base1 = calib[0] & BASE1_MASK;
@@ -420,7 +420,7 @@ static int calibrate_8974(struct tsens_priv *priv)
 			p2[i] <<= 2;
 			p2[i] |= BIT_APPEND;
 		}
-		/* Fall through */
+		fallthrough;
 	case ONE_PT_CALIB2:
 		for (i = 0; i < priv->num_sensors; i++) {
 			p1[i] += base1;
diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
index b682a4df00810..3c19a3800c6d6 100644
--- a/drivers/thermal/qcom/tsens-v1.c
+++ b/drivers/thermal/qcom/tsens-v1.c
@@ -202,7 +202,7 @@ static int calibrate_v1(struct tsens_priv *priv)
 		p2[9] = (qfprom_cdata[3] & S9_P2_MASK) >> S9_P2_SHIFT;
 		for (i = 0; i < priv->num_sensors; i++)
 			p2[i] = ((base1 + p2[i]) << 2);
-		/* Fall through */
+		fallthrough;
 	case ONE_PT_CALIB2:
 		base0 = (qfprom_cdata[4] & BASE0_MASK) >> BASE0_SHIFT;
 		p1[0] = (qfprom_cdata[0] & S0_P1_MASK) >> S0_P1_SHIFT;
@@ -263,7 +263,7 @@ static int calibrate_8976(struct tsens_priv *priv)
 
 		for (i = 0; i < priv->num_sensors; i++)
 			p2[i] = ((base1 + p2[i]) << 2);
-		/* Fall through */
+		fallthrough;
 	case ONE_PT_CALIB2:
 		base0 = qfprom_cdata[0] & MSM8976_BASE0_MASK;
 		p1[0] = (qfprom_cdata[0] & MSM8976_S0_P1_MASK) >> MSM8976_S0_P1_SHIFT;
diff --git a/drivers/thunderbolt/ctl.c b/drivers/thunderbolt/ctl.c
index f77ceae5c7d78..394a23ce6ca47 100644
--- a/drivers/thunderbolt/ctl.c
+++ b/drivers/thunderbolt/ctl.c
@@ -453,7 +453,7 @@ static void tb_ctl_rx_callback(struct tb_ring *ring, struct ring_frame *frame,
 				   "RX: checksum mismatch, dropping packet\n");
 			goto rx;
 		}
-		/* Fall through */
+		fallthrough;
 	case TB_CFG_PKG_ICM_EVENT:
 		if (tb_ctl_handle_event(pkg->ctl, frame->eof, pkg, frame->size))
 			goto rx;
diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 712395f518b82..3845db569e4c4 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -2092,7 +2092,7 @@ static int tb_switch_add_dma_port(struct tb_switch *sw)
 		if (tb_route(sw))
 			return 0;
 
-		/* fallthrough */
+		fallthrough;
 	case 3:
 		ret = tb_switch_set_uuid(sw);
 		if (ret)
diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c
index 2aae2c76d880d..1a7e849840b29 100644
--- a/drivers/thunderbolt/tunnel.c
+++ b/drivers/thunderbolt/tunnel.c
@@ -315,7 +315,7 @@ static inline u32 tb_dp_cap_set_rate(u32 val, u32 rate)
 	switch (rate) {
 	default:
 		WARN(1, "invalid rate %u passed, defaulting to 1620 MB/s\n", rate);
-		/* Fallthrough */
+		fallthrough;
 	case 1620:
 		val |= DP_COMMON_CAP_RATE_RBR << DP_COMMON_CAP_RATE_SHIFT;
 		break;
@@ -355,7 +355,7 @@ static inline u32 tb_dp_cap_set_lanes(u32 val, u32 lanes)
 	default:
 		WARN(1, "invalid number of lanes %u passed, defaulting to 1\n",
 		     lanes);
-		/* Fallthrough */
+		fallthrough;
 	case 1:
 		val |= DP_COMMON_CAP_1_LANE << DP_COMMON_CAP_LANES_SHIFT;
 		break;
diff --git a/drivers/tty/hvc/hvc_xen.c b/drivers/tty/hvc/hvc_xen.c
index 2a0e51a20e342..92c9a476defc9 100644
--- a/drivers/tty/hvc/hvc_xen.c
+++ b/drivers/tty/hvc/hvc_xen.c
@@ -492,7 +492,7 @@ static void xencons_backend_changed(struct xenbus_device *dev,
 	case XenbusStateClosed:
 		if (dev->state == XenbusStateClosed)
 			break;
-		/* fall through - Missed the backend's CLOSING state. */
+		fallthrough;	/* Missed the backend's CLOSING state */
 	case XenbusStateClosing:
 		xenbus_frontend_closed(dev);
 		break;
diff --git a/drivers/tty/mips_ejtag_fdc.c b/drivers/tty/mips_ejtag_fdc.c
index 21e76a2ec1820..a8e19b4833bf9 100644
--- a/drivers/tty/mips_ejtag_fdc.c
+++ b/drivers/tty/mips_ejtag_fdc.c
@@ -243,7 +243,7 @@ static struct fdc_word mips_ejtag_fdc_encode(const char **ptrs,
 		/* Fall back to a 3 byte encoding */
 		word.bytes = 3;
 		word.word &= 0x00ffffff;
-		/* Fall through */
+		fallthrough;
 	case 3:
 		/* 3 byte encoding */
 		word.word |= 0x82000000;
diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 0a29a94ec438e..35cf12147e39c 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -1584,7 +1584,7 @@ static void gsm_dlci_data(struct gsm_dlci *dlci, const u8 *data, int clen)
 			gsm_process_modem(tty, dlci, modem, clen);
 			tty_kref_put(tty);
 		}
-		/* Fall through */
+		fallthrough;
 	case 1:		/* Line state will go via DLCI 0 controls only */
 	default:
 		tty_insert_flip_string(port, data, len);
@@ -1986,7 +1986,7 @@ static void gsm1_receive(struct gsm_mux *gsm, unsigned char c)
 		gsm->address = 0;
 		gsm->state = GSM_ADDRESS;
 		gsm->fcs = INIT_FCS;
-		/* Fall through */
+		fallthrough;
 	case GSM_ADDRESS:	/* Address continuation */
 		gsm->fcs = gsm_fcs_add(gsm->fcs, c);
 		if (gsm_read_ea(&gsm->address, c))
diff --git a/drivers/tty/n_hdlc.c b/drivers/tty/n_hdlc.c
index b09eac4b6d64f..8e975cb29833a 100644
--- a/drivers/tty/n_hdlc.c
+++ b/drivers/tty/n_hdlc.c
@@ -602,7 +602,7 @@ static int n_hdlc_tty_ioctl(struct tty_struct *tty, struct file *file,
 		case TCOFLUSH:
 			flush_tx_queue(tty);
 		}
-		/* fall through - to default */
+		fallthrough;	/* to default */
 
 	default:
 		error = n_tty_ioctl_helper(tty, file, cmd, arg);
diff --git a/drivers/tty/n_r3964.c b/drivers/tty/n_r3964.c
index f75696f0ee2d0..934dd2fb2ec80 100644
--- a/drivers/tty/n_r3964.c
+++ b/drivers/tty/n_r3964.c
@@ -605,7 +605,6 @@ static void receive_char(struct r3964_info *pInfo, const unsigned char c)
 		}
 		break;
 	case R3964_WAIT_FOR_RX_REPEAT:
-		/* FALLTHROUGH */
 	case R3964_IDLE:
 		if (c == STX) {
 			/* Prevent rx_queue from overflow: */
diff --git a/drivers/tty/serial/8250/8250_em.c b/drivers/tty/serial/8250/8250_em.c
index db88dee3a3999..f8e99995eee91 100644
--- a/drivers/tty/serial/8250/8250_em.c
+++ b/drivers/tty/serial/8250/8250_em.c
@@ -39,7 +39,7 @@ static void serial8250_em_serial_out(struct uart_port *p, int offset, int value)
 		break;
 	case UART_IER: /* IER @ 0x04 */
 		value &= 0x0f; /* only 4 valid bits - not Xscale */
-		/* fall-through */
+		fallthrough;
 	case UART_DLL_EM: /* DLL @ 0x24 (+9) */
 	case UART_DLM_EM: /* DLM @ 0x28 (+9) */
 		writel(value, p->membase + (offset << 2));
diff --git a/drivers/tty/serial/8250/8250_fintek.c b/drivers/tty/serial/8250/8250_fintek.c
index d1d253c4b518b..31c9e83ea3cb2 100644
--- a/drivers/tty/serial/8250/8250_fintek.c
+++ b/drivers/tty/serial/8250/8250_fintek.c
@@ -255,7 +255,7 @@ static void fintek_8250_set_irq_mode(struct fintek_8250 *pdata, bool is_level)
 	case CHIP_ID_F81866:
 		sio_write_mask_reg(pdata, F81866_FIFO_CTRL, F81866_IRQ_MODE1,
 				   0);
-		/* fall through */
+		fallthrough;
 	case CHIP_ID_F81865:
 		sio_write_mask_reg(pdata, F81866_IRQ_MODE, F81866_IRQ_SHARE,
 				   F81866_IRQ_SHARE);
diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 1a74d511b02a5..3eb2d485eaeb0 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -631,7 +631,7 @@ pci_timedia_setup(struct serial_private *priv,
 		break;
 	case 3:
 		offset = board->uart_offset;
-		/* FALLTHROUGH */
+		fallthrough;
 	case 4: /* BAR 2 */
 	case 5: /* BAR 3 */
 	case 6: /* BAR 4 */
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index 09475695effd4..06028da9bc6a2 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -1872,7 +1872,7 @@ static bool handle_rx_dma(struct uart_8250_port *up, unsigned int iir)
 	switch (iir & 0x3f) {
 	case UART_IIR_RX_TIMEOUT:
 		serial8250_rx_dma_flush(up);
-		/* fall-through */
+		fallthrough;
 	case UART_IIR_RLSI:
 		return true;
 	}
diff --git a/drivers/tty/serial/8250/8250_uniphier.c b/drivers/tty/serial/8250/8250_uniphier.c
index e0b73a5402db7..a2978abab0db6 100644
--- a/drivers/tty/serial/8250/8250_uniphier.c
+++ b/drivers/tty/serial/8250/8250_uniphier.c
@@ -75,7 +75,7 @@ static unsigned int uniphier_serial_in(struct uart_port *p, int offset)
 		break;
 	case UART_LCR:
 		valshift = 8;
-		/* fall through */
+		fallthrough;
 	case UART_MCR:
 		offset = UNIPHIER_UART_LCR_MCR;
 		break;
@@ -101,7 +101,7 @@ static void uniphier_serial_out(struct uart_port *p, int offset, int value)
 	case UART_SCR:
 		/* No SCR for this hardware.  Use CHAR as a scratch register */
 		valshift = 8;
-		/* fall through */
+		fallthrough;
 	case UART_FCR:
 		offset = UNIPHIER_UART_CHAR_FCR;
 		break;
@@ -109,7 +109,7 @@ static void uniphier_serial_out(struct uart_port *p, int offset, int value)
 		valshift = 8;
 		/* Divisor latch access bit does not exist. */
 		value &= ~UART_LCR_DLAB;
-		/* fall through */
+		fallthrough;
 	case UART_MCR:
 		offset = UNIPHIER_UART_LCR_MCR;
 		break;
diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c
index e43471b33710b..bb5fc8bdd57a6 100644
--- a/drivers/tty/serial/atmel_serial.c
+++ b/drivers/tty/serial/atmel_serial.c
@@ -1845,7 +1845,7 @@ static void atmel_get_ip_name(struct uart_port *port)
 		version = atmel_uart_readl(port, ATMEL_US_VERSION);
 		switch (version) {
 		case 0x814:	/* sama5d2 */
-			/* fall through */
+			fallthrough;
 		case 0x701:	/* sama5d4 */
 			atmel_port->fidi_min = 3;
 			atmel_port->fidi_max = 65535;
diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index 8573fc9cb0cdf..76b94d0ff5865 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -587,7 +587,6 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id)
 			transmit_chars(up, lsr);
 			break;
 		case UART_IIR_RX_TIMEOUT:
-			/* FALLTHROUGH */
 		case UART_IIR_RDI:
 			serial_omap_rdi(up, lsr);
 			break;
@@ -598,7 +597,6 @@ static irqreturn_t serial_omap_irq(int irq, void *dev_id)
 			/* simply try again */
 			break;
 		case UART_IIR_XOFF:
-			/* FALLTHROUGH */
 		default:
 			break;
 		}
diff --git a/drivers/tty/serial/rda-uart.c b/drivers/tty/serial/rda-uart.c
index b5ef86ae2746e..85366e0592585 100644
--- a/drivers/tty/serial/rda-uart.c
+++ b/drivers/tty/serial/rda-uart.c
@@ -259,7 +259,7 @@ static void rda_uart_set_termios(struct uart_port *port,
 	case CS5:
 	case CS6:
 		dev_warn(port->dev, "bit size not supported, using 7 bits\n");
-		/* Fall through */
+		fallthrough;
 	case CS7:
 		ctrl &= ~RDA_UART_DBITS_8;
 		break;
diff --git a/drivers/tty/serial/serial-tegra.c b/drivers/tty/serial/serial-tegra.c
index b87914ae6da8f..bd13014a1c537 100644
--- a/drivers/tty/serial/serial-tegra.c
+++ b/drivers/tty/serial/serial-tegra.c
@@ -876,7 +876,7 @@ static irqreturn_t tegra_uart_isr(int irq, void *data)
 				tegra_uart_write(tup, ier, UART_IER);
 				break;
 			}
-			/* Fall through */
+			fallthrough;
 		case 2: /* Receive */
 			if (!tup->use_rx_pio) {
 				is_rx_start = tup->rx_in_progress;
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 3403dd7905173..f797c971cd82f 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2101,7 +2101,7 @@ uart_set_options(struct uart_port *port, struct console *co,
 	switch (parity) {
 	case 'o': case 'O':
 		termios.c_cflag |= PARODD;
-		/*fall through*/
+		fallthrough;
 	case 'e': case 'E':
 		termios.c_cflag |= PARENB;
 		break;
diff --git a/drivers/tty/serial/sunsu.c b/drivers/tty/serial/sunsu.c
index 8ce9a7a256e56..319e5ceb6130e 100644
--- a/drivers/tty/serial/sunsu.c
+++ b/drivers/tty/serial/sunsu.c
@@ -514,7 +514,7 @@ static void receive_kbd_ms_chars(struct uart_sunsu_port *up, int is_break)
 			switch (ret) {
 			case 2:
 				sunsu_change_mouse_baud(up);
-				/* fallthru */
+				fallthrough;
 			case 1:
 				break;
 
diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c
index 7ea06bbc61973..001e19d7c17db 100644
--- a/drivers/tty/serial/sunzilog.c
+++ b/drivers/tty/serial/sunzilog.c
@@ -306,7 +306,7 @@ static void sunzilog_kbdms_receive_chars(struct uart_sunzilog_port *up,
 		switch (ret) {
 		case 2:
 			sunzilog_change_mouse_baud(up);
-			/* fallthru */
+			fallthrough;
 		case 1:
 			break;
 
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c
index 2833f1418d6d9..a9b1ee27183a7 100644
--- a/drivers/tty/serial/xilinx_uartps.c
+++ b/drivers/tty/serial/xilinx_uartps.c
@@ -544,7 +544,7 @@ static int cdns_uart_clk_notifier_cb(struct notifier_block *nb,
 
 		cdns_uart->baud = cdns_uart_set_baud_rate(cdns_uart->port,
 				cdns_uart->baud);
-		/* fall through */
+		fallthrough;
 	case ABORT_RATE_CHANGE:
 		if (!locked)
 			spin_lock_irqsave(&cdns_uart->port->lock, flags);
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 9245fffdbceb1..e18f318586ab4 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -866,7 +866,7 @@ static int __tty_perform_flush(struct tty_struct *tty, unsigned long arg)
 			ld->ops->flush_buffer(tty);
 			tty_unthrottle(tty);
 		}
-		/* fall through */
+		fallthrough;
 	case TCOFLUSH:
 		tty_driver_flush_buffer(tty);
 		break;
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index ccb533fd00a29..d8b9363b81c17 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -1553,7 +1553,7 @@ static void csi_J(struct vc_data *vc, int vpar)
 			break;
 		case 3: /* include scrollback */
 			flush_scrollback(vc);
-			/* fallthrough */
+			fallthrough;
 		case 2: /* erase whole display */
 			vc_uniscr_clear_lines(vc, 0, vc->vc_rows);
 			count = vc->vc_cols * vc->vc_rows;
@@ -2167,7 +2167,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
 		lf(vc);
 		if (!is_kbd(vc, lnm))
 			return;
-		/* fall through */
+		fallthrough;
 	case 13:
 		cr(vc);
 		return;
@@ -2306,7 +2306,7 @@ static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
 			return;
 		}
 		vc->vc_priv = EPecma;
-		/* fall through */
+		fallthrough;
 	case ESgetpars:
 		if (c == ';' && vc->vc_npar < NPAR - 1) {
 			vc->vc_npar++;
diff --git a/drivers/usb/c67x00/c67x00-sched.c b/drivers/usb/c67x00/c67x00-sched.c
index f7f6229082cad..60f4711717d22 100644
--- a/drivers/usb/c67x00/c67x00-sched.c
+++ b/drivers/usb/c67x00/c67x00-sched.c
@@ -710,7 +710,8 @@ static int c67x00_add_ctrl_urb(struct c67x00_hcd *c67x00, struct urb *urb)
 			if (ret)
 				return ret;
 			break;
-		}		/* else fallthrough */
+		}
+		fallthrough;
 	case STATUS_STAGE:
 		pid = !usb_pipeout(urb->pipe) ? USB_PID_OUT : USB_PID_IN;
 		ret = c67x00_create_td(c67x00, urb, NULL, 0, pid, 1,
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index 052d5accfe9b2..5b768b80d1eeb 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -727,7 +727,7 @@ static void hub_irq(struct urb *urb)
 		if ((++hub->nerrors < 10) || hub->error)
 			goto resubmit;
 		hub->error = status;
-		/* FALL THROUGH */
+		fallthrough;
 
 	/* let hub_wq handle things */
 	case 0:			/* we got data:  port status changed */
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 422aea24afcd1..2eb34c8b4065f 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -646,9 +646,8 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 			if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
 				break;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case DWC3_GHWPARAMS3_HSPHY_IFC_ULPI:
-		/* FALLTHROUGH */
 	default:
 		break;
 	}
@@ -1411,7 +1410,7 @@ static void dwc3_check_params(struct dwc3 *dwc)
 	default:
 		dev_err(dev, "invalid maximum_speed parameter %d\n",
 			dwc->maximum_speed);
-		/* fall through */
+		fallthrough;
 	case USB_SPEED_UNKNOWN:
 		/* default to superspeed */
 		dwc->maximum_speed = USB_SPEED_SUPER;
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c
index 331c951d72dc9..950c9435beec3 100644
--- a/drivers/usb/gadget/function/f_mass_storage.c
+++ b/drivers/usb/gadget/function/f_mass_storage.c
@@ -2039,7 +2039,6 @@ static int do_scsi_command(struct fsg_common *common)
 	case RELEASE:
 	case RESERVE:
 	case SEND_DIAGNOSTIC:
-		fallthrough;
 
 	default:
 unknown_cmnd:
diff --git a/drivers/usb/gadget/udc/atmel_usba_udc.c b/drivers/usb/gadget/udc/atmel_usba_udc.c
index fa6793065c7c9..a6426dd1cfefe 100644
--- a/drivers/usb/gadget/udc/atmel_usba_udc.c
+++ b/drivers/usb/gadget/udc/atmel_usba_udc.c
@@ -328,7 +328,7 @@ static int usba_config_fifo_table(struct usba_udc *udc)
 	switch (fifo_mode) {
 	default:
 		fifo_mode = 0;
-		/* fall through */
+		fallthrough;
 	case 0:
 		udc->fifo_cfg = NULL;
 		n = 0;
diff --git a/drivers/usb/gadget/udc/fsl_udc_core.c b/drivers/usb/gadget/udc/fsl_udc_core.c
index b2638e83bb498..a6f7b2594c090 100644
--- a/drivers/usb/gadget/udc/fsl_udc_core.c
+++ b/drivers/usb/gadget/udc/fsl_udc_core.c
@@ -250,7 +250,7 @@ static int dr_controller_setup(struct fsl_udc *udc)
 		break;
 	case FSL_USB2_PHY_UTMI_WIDE:
 		portctrl |= PORTSCX_PTW_16BIT;
-		/* fall through */
+		fallthrough;
 	case FSL_USB2_PHY_UTMI:
 	case FSL_USB2_PHY_UTMI_DUAL:
 		if (udc->pdata->have_sysif_regs) {
diff --git a/drivers/usb/gadget/udc/pxa25x_udc.c b/drivers/usb/gadget/udc/pxa25x_udc.c
index cfafdd92c2a84..10324a7334fe1 100644
--- a/drivers/usb/gadget/udc/pxa25x_udc.c
+++ b/drivers/usb/gadget/udc/pxa25x_udc.c
@@ -2340,12 +2340,12 @@ static int pxa25x_udc_probe(struct platform_device *pdev)
 	case PXA250_A0:
 	case PXA250_A1:
 		/* A0/A1 "not released"; ep 13, 15 unusable */
-		/* fall through */
+		fallthrough;
 	case PXA250_B2: case PXA210_B2:
 	case PXA250_B1: case PXA210_B1:
 	case PXA250_B0: case PXA210_B0:
 		/* OUT-DMA is broken ... */
-		/* fall through */
+		fallthrough;
 	case PXA250_C0: case PXA210_C0:
 		break;
 #elif	defined(CONFIG_ARCH_IXP4XX)
diff --git a/drivers/usb/host/isp116x-hcd.c b/drivers/usb/host/isp116x-hcd.c
index a87c0b26279e7..3055d9abfec30 100644
--- a/drivers/usb/host/isp116x-hcd.c
+++ b/drivers/usb/host/isp116x-hcd.c
@@ -1019,7 +1019,7 @@ static int isp116x_hub_control(struct usb_hcd *hcd,
 			spin_lock_irqsave(&isp116x->lock, flags);
 			isp116x_write_reg32(isp116x, HCRHSTATUS, RH_HS_OCIC);
 			spin_unlock_irqrestore(&isp116x->lock, flags);
-			/* fall through */
+			fallthrough;
 		case C_HUB_LOCAL_POWER:
 			DBG("C_HUB_LOCAL_POWER\n");
 			break;
@@ -1421,10 +1421,10 @@ static int isp116x_bus_suspend(struct usb_hcd *hcd)
 		isp116x_write_reg32(isp116x, HCCONTROL,
 				    (val & ~HCCONTROL_HCFS) |
 				    HCCONTROL_USB_RESET);
-		/* fall through */
+		fallthrough;
 	case HCCONTROL_USB_RESET:
 		ret = -EBUSY;
-		/* fall through */
+		fallthrough;
 	default:		/* HCCONTROL_USB_SUSPEND */
 		spin_unlock_irqrestore(&isp116x->lock, flags);
 		break;
diff --git a/drivers/usb/host/pci-quirks.c b/drivers/usb/host/pci-quirks.c
index b8961c0381cfd..8c1bbac6d1366 100644
--- a/drivers/usb/host/pci-quirks.c
+++ b/drivers/usb/host/pci-quirks.c
@@ -957,7 +957,8 @@ static void quirk_usb_disable_ehci(struct pci_dev *pdev)
 			ehci_bios_handoff(pdev, op_reg_base, cap, offset);
 			break;
 		case 0: /* Illegal reserved cap, set cap=0 so we exit */
-			cap = 0; /* fall through */
+			cap = 0;
+			fallthrough;
 		default:
 			dev_warn(&pdev->dev,
 				 "EHCI: unrecognized capability %02x\n",
diff --git a/drivers/usb/host/xhci-dbgcap.c b/drivers/usb/host/xhci-dbgcap.c
index fcc5ac5ce8b10..ccb0156fcebeb 100644
--- a/drivers/usb/host/xhci-dbgcap.c
+++ b/drivers/usb/host/xhci-dbgcap.c
@@ -699,7 +699,7 @@ static void dbc_handle_xfer_event(struct xhci_dbc *dbc, union xhci_trb *event)
 	switch (comp_code) {
 	case COMP_SUCCESS:
 		remain_length = 0;
-	/* FALLTHROUGH */
+		fallthrough;
 	case COMP_SHORT_PACKET:
 		status = 0;
 		break;
diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index c3554e37e09f3..fe27dfc45270c 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -1483,7 +1483,7 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
 			break;
 		case USB_PORT_FEAT_C_SUSPEND:
 			bus_state->port_c_suspend &= ~(1 << wIndex);
-			/* fall through */
+			fallthrough;
 		case USB_PORT_FEAT_C_RESET:
 		case USB_PORT_FEAT_C_BH_PORT_RESET:
 		case USB_PORT_FEAT_C_CONNECTION:
diff --git a/drivers/usb/host/xhci-mem.c b/drivers/usb/host/xhci-mem.c
index 696fad50b478b..fe405cd38dbc1 100644
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1311,7 +1311,7 @@ static unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
 			interval = xhci_parse_microframe_interval(udev, ep);
 			break;
 		}
-		/* Fall through - SS and HS isoc/int have same decoding */
+		fallthrough;	/* SS and HS isoc/int have same decoding */
 
 	case USB_SPEED_SUPER_PLUS:
 	case USB_SPEED_SUPER:
@@ -1331,7 +1331,7 @@ static unsigned int xhci_get_endpoint_interval(struct usb_device *udev,
 		 * since it uses the same rules as low speed interrupt
 		 * endpoints.
 		 */
-		/* fall through */
+		fallthrough;
 
 	case USB_SPEED_LOW:
 		if (usb_endpoint_xfer_int(&ep->desc) ||
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index 2c255d0620b05..a741a38a4c690 100644
--- a/drivers/usb/host/xhci-ring.c
+++ b/drivers/usb/host/xhci-ring.c
@@ -2103,7 +2103,7 @@ static int process_ctrl_td(struct xhci_hcd *xhci, struct xhci_td *td,
 			break;
 		xhci_dbg(xhci, "TRB error %u, halted endpoint index = %u\n",
 			 trb_comp_code, ep_index);
-		/* else fall through */
+		fallthrough;
 	case COMP_STALL_ERROR:
 		/* Did we transfer part of the data (middle) phase? */
 		if (trb_type == TRB_DATA || trb_type == TRB_NORMAL)
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 3c41b14ecce72..627c4c510446a 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -4618,7 +4618,7 @@ static unsigned long long xhci_calculate_intel_u1_timeout(
 			break;
 		}
 		/* Otherwise the calculation is the same as isoc eps */
-		/* fall through */
+		fallthrough;
 	case USB_ENDPOINT_XFER_ISOC:
 		timeout_ns = xhci_service_interval_to_ns(desc);
 		timeout_ns = DIV_ROUND_UP_ULL(timeout_ns * 105, 100);
diff --git a/drivers/usb/musb/cppi_dma.c b/drivers/usb/musb/cppi_dma.c
index c545b27ea5681..edb5b63d70634 100644
--- a/drivers/usb/musb/cppi_dma.c
+++ b/drivers/usb/musb/cppi_dma.c
@@ -975,7 +975,7 @@ static int cppi_channel_program(struct dma_channel *ch,
 		musb_dbg(musb, "%cX DMA%d not allocated!",
 				cppi_ch->transmit ? 'T' : 'R',
 				cppi_ch->index);
-		/* FALLTHROUGH */
+		fallthrough;
 	case MUSB_DMA_STATUS_FREE:
 		break;
 	}
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 5a56a03996b1d..849e0b770130a 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -852,7 +852,7 @@ static void musb_handle_intr_suspend(struct musb *musb, u8 devctl)
 	case OTG_STATE_B_IDLE:
 		if (!musb->is_active)
 			break;
-		/* fall through */
+		fallthrough;
 	case OTG_STATE_B_PERIPHERAL:
 		musb_g_suspend(musb);
 		musb->is_active = musb->g.b_hnp_enable;
@@ -972,9 +972,8 @@ static void musb_handle_intr_disconnect(struct musb *musb, u8 devctl)
 	case OTG_STATE_A_PERIPHERAL:
 		musb_hnp_stop(musb);
 		musb_root_disconnect(musb);
-		/* FALLTHROUGH */
+		fallthrough;
 	case OTG_STATE_B_WAIT_ACON:
-		/* FALLTHROUGH */
 	case OTG_STATE_B_PERIPHERAL:
 	case OTG_STATE_B_IDLE:
 		musb_g_disconnect(musb);
@@ -1009,7 +1008,7 @@ static void musb_handle_intr_reset(struct musb *musb)
 		switch (musb->xceiv->otg->state) {
 		case OTG_STATE_A_SUSPEND:
 			musb_g_reset(musb);
-			/* FALLTHROUGH */
+			fallthrough;
 		case OTG_STATE_A_WAIT_BCON:	/* OPT TD.4.7-900ms */
 			/* never use invalid T(a_wait_bcon) */
 			musb_dbg(musb, "HNP: in %s, %d msec timeout",
@@ -1030,7 +1029,7 @@ static void musb_handle_intr_reset(struct musb *musb)
 			break;
 		case OTG_STATE_B_IDLE:
 			musb->xceiv->otg->state = OTG_STATE_B_PERIPHERAL;
-			/* FALLTHROUGH */
+			fallthrough;
 		case OTG_STATE_B_PERIPHERAL:
 			musb_g_reset(musb);
 			break;
@@ -1471,7 +1470,7 @@ static int ep_config_from_table(struct musb *musb)
 	switch (fifo_mode) {
 	default:
 		fifo_mode = 0;
-		/* FALLTHROUGH */
+		fallthrough;
 	case 0:
 		cfg = mode_0_cfg;
 		n = ARRAY_SIZE(mode_0_cfg);
@@ -2018,7 +2017,7 @@ static void musb_pm_runtime_check_session(struct musb *musb)
 			musb->quirk_retries--;
 			return;
 		}
-		/* fall through */
+		fallthrough;
 	case MUSB_QUIRK_A_DISCONNECT_19:
 		if (musb->quirk_retries && !musb->flush_irq_work) {
 			musb_dbg(musb,
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 19556c1a8ae87..30085b2be7b90 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -232,7 +232,7 @@ static int dsps_check_status(struct musb *musb, void *unused)
 			dsps_mod_timer_optional(glue);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 
 	case OTG_STATE_A_WAIT_BCON:
 		/* keep VBUS on for host-only mode */
@@ -242,7 +242,7 @@ static int dsps_check_status(struct musb *musb, void *unused)
 		}
 		musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 		skip_session = 1;
-		/* fall through */
+		fallthrough;
 
 	case OTG_STATE_A_IDLE:
 	case OTG_STATE_B_IDLE:
@@ -793,7 +793,7 @@ static int dsps_create_musb_pdev(struct dsps_glue *glue,
 	case USB_SPEED_SUPER:
 		dev_warn(dev, "ignore incorrect maximum_speed "
 				"(super-speed) setting in dts");
-		/* fall through */
+		fallthrough;
 	default:
 		config->maximum_speed = USB_SPEED_HIGH;
 	}
diff --git a/drivers/usb/musb/musb_gadget_ep0.c b/drivers/usb/musb/musb_gadget_ep0.c
index 0ae3e0be043ed..44d3cb02fa76a 100644
--- a/drivers/usb/musb/musb_gadget_ep0.c
+++ b/drivers/usb/musb/musb_gadget_ep0.c
@@ -735,7 +735,7 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
 			musb_writeb(mbase, MUSB_TESTMODE,
 					musb->test_mode_nr);
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 
 	case MUSB_EP0_STAGE_STATUSOUT:
 		/* end of sequence #1: write to host (TX state) */
@@ -767,7 +767,7 @@ irqreturn_t musb_g_ep0_irq(struct musb *musb)
 		 */
 		retval = IRQ_HANDLED;
 		musb->ep0_state = MUSB_EP0_STAGE_SETUP;
-		/* FALLTHROUGH */
+		fallthrough;
 
 	case MUSB_EP0_STAGE_SETUP:
 setup:
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
index 8b7d22a0c0fba..30c5e7de0761c 100644
--- a/drivers/usb/musb/musb_host.c
+++ b/drivers/usb/musb/musb_host.c
@@ -360,7 +360,7 @@ static void musb_advance_schedule(struct musb *musb, struct urb *urb,
 				qh = first_qh(head);
 				break;
 			}
-			/* fall through */
+			fallthrough;
 
 		case USB_ENDPOINT_XFER_ISOC:
 		case USB_ENDPOINT_XFER_INT:
@@ -1019,7 +1019,7 @@ static bool musb_h_ep0_continue(struct musb *musb, u16 len, struct urb *urb)
 			musb->ep0_stage = MUSB_EP0_OUT;
 			more = true;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case MUSB_EP0_OUT:
 		fifo_count = min_t(size_t, qh->maxpacket,
 				   urb->transfer_buffer_length -
@@ -2222,7 +2222,7 @@ static int musb_urb_enqueue(
 			interval = max_t(u8, epd->bInterval, 1);
 			break;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case USB_ENDPOINT_XFER_ISOC:
 		/* ISO always uses logarithmic encoding */
 		interval = min_t(u8, epd->bInterval, 16);
diff --git a/drivers/usb/musb/musb_virthub.c b/drivers/usb/musb/musb_virthub.c
index cb7ae297a3af0..cafc69536e1d7 100644
--- a/drivers/usb/musb/musb_virthub.c
+++ b/drivers/usb/musb/musb_virthub.c
@@ -211,7 +211,7 @@ void musb_root_disconnect(struct musb *musb)
 			musb->g.is_a_peripheral = 1;
 			break;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case OTG_STATE_A_HOST:
 		musb->xceiv->otg->state = OTG_STATE_A_WAIT_BCON;
 		musb->is_active = 0;
diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
index d62c78b97cadb..4232f1ce3fbfa 100644
--- a/drivers/usb/musb/omap2430.c
+++ b/drivers/usb/musb/omap2430.c
@@ -104,7 +104,7 @@ static void omap_musb_set_mailbox(struct omap2430_glue *glue)
 			if (error)
 				break;
 			musb->xceiv->otg->state = OTG_STATE_A_WAIT_VRISE;
-			/* Fall through */
+			fallthrough;
 		case OTG_STATE_A_WAIT_VRISE:
 		case OTG_STATE_A_WAIT_BCON:
 		case OTG_STATE_A_HOST:
diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index 99890d1bbfcb5..c26683a2702b6 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -464,7 +464,7 @@ static void musb_do_idle(struct timer_list *t)
 			dev_dbg(musb->controller, "Nothing connected %s, turning off VBUS\n",
 					usb_otg_state_string(musb->xceiv->otg->state));
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 	case OTG_STATE_A_IDLE:
 		tusb_musb_set_vbus(musb, 0);
 	default:
diff --git a/drivers/usb/storage/sddr55.c b/drivers/usb/storage/sddr55.c
index c8a988d2cfdd3..15dc25801cdcc 100644
--- a/drivers/usb/storage/sddr55.c
+++ b/drivers/usb/storage/sddr55.c
@@ -592,7 +592,7 @@ static unsigned long sddr55_get_capacity(struct us_data *us) {
 	case 0x64:
 		info->pageshift = 8;
 		info->smallpageshift = 1;
-		/* fall through */
+		fallthrough;
 	case 0x5d: // 5d is a ROM card with pagesize 512.
 		return 0x00200000;
 
diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index d592071119ba6..08f9296431e9a 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -688,7 +688,7 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
 		break;
 	case DMA_BIDIRECTIONAL:
 		cmdinfo->state |= ALLOC_DATA_IN_URB | SUBMIT_DATA_IN_URB;
-		/* fall through */
+		fallthrough;
 	case DMA_TO_DEVICE:
 		cmdinfo->state |= ALLOC_DATA_OUT_URB | SUBMIT_DATA_OUT_URB;
 	case DMA_NONE:
diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index f57d91fd0e092..bd80e03b2b6f8 100644
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
@@ -157,7 +157,7 @@ static enum typec_cc_status tcpci_to_typec_cc(unsigned int cc, bool sink)
 	case 0x3:
 		if (sink)
 			return TYPEC_CC_RP_3_0;
-		/* fall through */
+		fallthrough;
 	case 0x0:
 	default:
 		return TYPEC_CC_OPEN;
diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index 620465c2a1da4..1ab1f5cda4ac2 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -990,7 +990,7 @@ static long vfio_pci_ioctl(void *device_data,
 		case VFIO_PCI_ERR_IRQ_INDEX:
 			if (pci_is_pcie(vdev->pdev))
 				break;
-		/* fall through */
+			fallthrough;
 		default:
 			return -EINVAL;
 		}
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index c992973cc2d5f..5fbf0c1f74338 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -2439,7 +2439,7 @@ static void *vfio_iommu_type1_open(unsigned long arg)
 		break;
 	case VFIO_TYPE1_NESTING_IOMMU:
 		iommu->nesting = true;
-		/* fall through */
+		fallthrough;
 	case VFIO_TYPE1v2_IOMMU:
 		iommu->v2 = true;
 		break;
diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c
index ddc7f5f0401fd..8ec19425671fb 100644
--- a/drivers/video/backlight/adp8860_bl.c
+++ b/drivers/video/backlight/adp8860_bl.c
@@ -681,7 +681,7 @@ static int adp8860_probe(struct i2c_client *client,
 	switch (ADP8860_MANID(reg_val)) {
 	case ADP8863_MANUFID:
 		data->gdwn_dis = !!pdata->gdwn_dis;
-		/* fall through */
+		fallthrough;
 	case ADP8860_MANUFID:
 		data->en_ambl_sens = !!pdata->en_ambl_sens;
 		break;
diff --git a/drivers/video/fbdev/acornfb.c b/drivers/video/fbdev/acornfb.c
index 09a9ad901dad8..bcc92aecf6668 100644
--- a/drivers/video/fbdev/acornfb.c
+++ b/drivers/video/fbdev/acornfb.c
@@ -857,7 +857,7 @@ static void acornfb_parse_dram(char *opt)
 		case 'M':
 		case 'm':
 			size *= 1024;
-			/* Fall through */
+			fallthrough;
 		case 'K':
 		case 'k':
 			size *= 1024;
diff --git a/drivers/video/fbdev/arcfb.c b/drivers/video/fbdev/arcfb.c
index 6f7838979f0a9..ae3d8e8b8d336 100644
--- a/drivers/video/fbdev/arcfb.c
+++ b/drivers/video/fbdev/arcfb.c
@@ -419,7 +419,7 @@ static int arcfb_ioctl(struct fb_info *info,
 			schedule();
 			finish_wait(&arcfb_waitq, &wait);
 		}
-		/* fall through */
+			fallthrough;
 
 		case FBIO_GETCONTROL2:
 		{
diff --git a/drivers/video/fbdev/atmel_lcdfb.c b/drivers/video/fbdev/atmel_lcdfb.c
index 1e252192569a8..bfd2f00b403b1 100644
--- a/drivers/video/fbdev/atmel_lcdfb.c
+++ b/drivers/video/fbdev/atmel_lcdfb.c
@@ -508,7 +508,7 @@ static int atmel_lcdfb_check_var(struct fb_var_screeninfo *var,
 	case 32:
 		var->transp.offset = 24;
 		var->transp.length = 8;
-		/* fall through */
+		fallthrough;
 	case 24:
 		if (pdata->lcd_wiring_mode == ATMEL_LCDC_WIRING_RGB) {
 			/* RGB:888 mode */
@@ -633,7 +633,7 @@ static int atmel_lcdfb_set_par(struct fb_info *info)
 		case 2: value |= ATMEL_LCDC_PIXELSIZE_2; break;
 		case 4: value |= ATMEL_LCDC_PIXELSIZE_4; break;
 		case 8: value |= ATMEL_LCDC_PIXELSIZE_8; break;
-		case 15: /* fall through */
+		case 15:
 		case 16: value |= ATMEL_LCDC_PIXELSIZE_16; break;
 		case 24: value |= ATMEL_LCDC_PIXELSIZE_24; break;
 		case 32: value |= ATMEL_LCDC_PIXELSIZE_32; break;
diff --git a/drivers/video/fbdev/aty/radeon_pm.c b/drivers/video/fbdev/aty/radeon_pm.c
index 7c4483c7f313a..f3d8123d7f363 100644
--- a/drivers/video/fbdev/aty/radeon_pm.c
+++ b/drivers/video/fbdev/aty/radeon_pm.c
@@ -1208,11 +1208,11 @@ static void radeon_pm_enable_dll_m10(struct radeonfb_info *rinfo)
 	case 1:
 		if (mc & 0x4)
 			break;
-		/* fall through */
+		fallthrough;
 	case 2:
 		dll_sleep_mask |= MDLL_R300_RDCK__MRDCKB_SLEEP;
 		dll_reset_mask |= MDLL_R300_RDCK__MRDCKB_RESET;
-		/* fall through */
+		fallthrough;
 	case 0:
 		dll_sleep_mask |= MDLL_R300_RDCK__MRDCKA_SLEEP;
 		dll_reset_mask |= MDLL_R300_RDCK__MRDCKA_RESET;
@@ -1221,7 +1221,7 @@ static void radeon_pm_enable_dll_m10(struct radeonfb_info *rinfo)
 	case 1:
 		if (!(mc & 0x4))
 			break;
-		/* fall through */
+		fallthrough;
 	case 2:
 		dll_sleep_mask |= MDLL_R300_RDCK__MRDCKD_SLEEP;
 		dll_reset_mask |= MDLL_R300_RDCK__MRDCKD_RESET;
diff --git a/drivers/video/fbdev/cirrusfb.c b/drivers/video/fbdev/cirrusfb.c
index 3df64a9731945..15a9ee7cd734d 100644
--- a/drivers/video/fbdev/cirrusfb.c
+++ b/drivers/video/fbdev/cirrusfb.c
@@ -1476,11 +1476,11 @@ static void init_vgachip(struct fb_info *info)
 		mdelay(100);
 		/* mode */
 		vga_wgfx(cinfo->regbase, CL_GR31, 0x00);
-		/* fall through */
+		fallthrough;
 	case BT_GD5480:
 		/* from Klaus' NetBSD driver: */
 		vga_wgfx(cinfo->regbase, CL_GR2F, 0x00);
-		/* fall through */
+		fallthrough;
 	case BT_ALPINE:
 		/* put blitter into 542x compat */
 		vga_wgfx(cinfo->regbase, CL_GR33, 0x00);
diff --git a/drivers/video/fbdev/controlfb.c b/drivers/video/fbdev/controlfb.c
index 9c4f1be856eca..a88dcb63eeb45 100644
--- a/drivers/video/fbdev/controlfb.c
+++ b/drivers/video/fbdev/controlfb.c
@@ -713,7 +713,7 @@ static int controlfb_blank(int blank_mode, struct fb_info *info)
 			break;
 		case FB_BLANK_POWERDOWN:
 			ctrl &= ~0x33;
-			/* fall through */
+			fallthrough;
 		case FB_BLANK_NORMAL:
 			ctrl |= 0x400;
 			break;
diff --git a/drivers/video/fbdev/core/fbmem.c b/drivers/video/fbdev/core/fbmem.c
index da7c88ffaa6a8..6815bfb7f5724 100644
--- a/drivers/video/fbdev/core/fbmem.c
+++ b/drivers/video/fbdev/core/fbmem.c
@@ -1306,7 +1306,7 @@ static long fb_compat_ioctl(struct file *file, unsigned int cmd,
 	case FBIOGET_CON2FBMAP:
 	case FBIOPUT_CON2FBMAP:
 		arg = (unsigned long) compat_ptr(arg);
-		/* fall through */
+		fallthrough;
 	case FBIOBLANK:
 		ret = do_fb_ioctl(info, cmd, arg);
 		break;
diff --git a/drivers/video/fbdev/fsl-diu-fb.c b/drivers/video/fbdev/fsl-diu-fb.c
index 67ebfe5c9f1d8..a547c21c7e928 100644
--- a/drivers/video/fbdev/fsl-diu-fb.c
+++ b/drivers/video/fbdev/fsl-diu-fb.c
@@ -1287,7 +1287,7 @@ static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
 		dev_warn(info->dev,
 			 "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
 			 MFB_SET_PIXFMT_OLD);
-		/* fall through */
+		fallthrough;
 	case MFB_SET_PIXFMT:
 		if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
 			return -EFAULT;
@@ -1297,7 +1297,7 @@ static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
 		dev_warn(info->dev,
 			 "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
 			 MFB_GET_PIXFMT_OLD);
-		/* fall through */
+		fallthrough;
 	case MFB_GET_PIXFMT:
 		pix_fmt = ad->pix_fmt;
 		if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
diff --git a/drivers/video/fbdev/gxt4500.c b/drivers/video/fbdev/gxt4500.c
index 13ded3a107084..e5475ae1e1587 100644
--- a/drivers/video/fbdev/gxt4500.c
+++ b/drivers/video/fbdev/gxt4500.c
@@ -534,7 +534,7 @@ static int gxt4500_setcolreg(unsigned int reg, unsigned int red,
 			break;
 		case DFA_PIX_32BIT:
 			val |= (reg << 24);
-			/* fall through */
+			fallthrough;
 		case DFA_PIX_24BIT:
 			val |= (reg << 16) | (reg << 8);
 			break;
diff --git a/drivers/video/fbdev/hyperv_fb.c b/drivers/video/fbdev/hyperv_fb.c
index e4c3c8b65da44..02411d89cb462 100644
--- a/drivers/video/fbdev/hyperv_fb.c
+++ b/drivers/video/fbdev/hyperv_fb.c
@@ -648,13 +648,13 @@ static int synthvid_connect_vsp(struct hv_device *hdev)
 		ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN10);
 		if (!ret)
 			break;
-		/* Fallthrough */
+		fallthrough;
 	case VERSION_WIN8:
 	case VERSION_WIN8_1:
 		ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN8);
 		if (!ret)
 			break;
-		/* Fallthrough */
+		fallthrough;
 	case VERSION_WS2008:
 	case VERSION_WIN7:
 		ret = synthvid_negotiate_ver(hdev, SYNTHVID_VERSION_WIN7);
diff --git a/drivers/video/fbdev/i740fb.c b/drivers/video/fbdev/i740fb.c
index c65ec7386e87b..e6f35f8feefcb 100644
--- a/drivers/video/fbdev/i740fb.c
+++ b/drivers/video/fbdev/i740fb.c
@@ -430,7 +430,7 @@ static int i740fb_decode_var(const struct fb_var_screeninfo *var,
 		break;
 	case 9 ... 15:
 		bpp = 15;
-		/* fall through */
+		fallthrough;
 	case 16:
 		if ((1000000 / var->pixclock) > DACSPEED16) {
 			dev_err(info->device, "requested pixclock %i MHz out of range (max. %i MHz at 15/16bpp)\n",
diff --git a/drivers/video/fbdev/mmp/fb/mmpfb.c b/drivers/video/fbdev/mmp/fb/mmpfb.c
index 01c75c031cb6a..39ebbe026ddf5 100644
--- a/drivers/video/fbdev/mmp/fb/mmpfb.c
+++ b/drivers/video/fbdev/mmp/fb/mmpfb.c
@@ -90,8 +90,6 @@ static int var_to_pixfmt(struct fb_var_screeninfo *var)
 			else
 				return PIXFMT_BGR888UNPACK;
 		}
-
-		/* fall through */
 	}
 
 	return -EINVAL;
diff --git a/drivers/video/fbdev/nvidia/nv_hw.c b/drivers/video/fbdev/nvidia/nv_hw.c
index 8335da4ca30e2..9b0a324bb1b48 100644
--- a/drivers/video/fbdev/nvidia/nv_hw.c
+++ b/drivers/video/fbdev/nvidia/nv_hw.c
@@ -896,7 +896,7 @@ void NVCalcStateExt(struct nvidia_par *par,
 		if (!par->FlatPanel)
 			state->control = NV_RD32(par->PRAMDAC0, 0x0580) &
 				0xeffffeff;
-		/* fallthrough */
+		fallthrough;
 	case NV_ARCH_10:
 	case NV_ARCH_20:
 	case NV_ARCH_30:
diff --git a/drivers/video/fbdev/offb.c b/drivers/video/fbdev/offb.c
index 5cd0f5f6a4ae7..4501e848a36f2 100644
--- a/drivers/video/fbdev/offb.c
+++ b/drivers/video/fbdev/offb.c
@@ -141,7 +141,7 @@ static int offb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
 		/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 		out_le32(par->cmap_adr + 0x58,
 			 in_le32(par->cmap_adr + 0x58) & ~0x20);
-		/* fall through */
+		fallthrough;
 	case cmap_r128:
 		/* Set palette index & data */
 		out_8(par->cmap_adr + 0xb0, regno);
@@ -211,7 +211,7 @@ static int offb_blank(int blank, struct fb_info *info)
 				/* Clear PALETTE_ACCESS_CNTL in DAC_CNTL */
 				out_le32(par->cmap_adr + 0x58,
 					 in_le32(par->cmap_adr + 0x58) & ~0x20);
-				/* fall through */
+				fallthrough;
 			case cmap_r128:
 				/* Set palette index & data */
 				out_8(par->cmap_adr + 0xb0, i);
diff --git a/drivers/video/fbdev/omap/lcdc.c b/drivers/video/fbdev/omap/lcdc.c
index fa73acfc1371d..7317c9aad6772 100644
--- a/drivers/video/fbdev/omap/lcdc.c
+++ b/drivers/video/fbdev/omap/lcdc.c
@@ -328,13 +328,13 @@ static int omap_lcdc_setup_plane(int plane, int channel_out,
 			lcdc.bpp = 12;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	case OMAPFB_COLOR_YUV422:
 		if (lcdc.ext_mode) {
 			lcdc.bpp = 16;
 			break;
 		}
-		/* fallthrough */
+		fallthrough;
 	default:
 		/* FIXME: other BPPs.
 		 * bpp1: code  0,     size 256
diff --git a/drivers/video/fbdev/omap/omapfb_main.c b/drivers/video/fbdev/omap/omapfb_main.c
index 0cbcc74fa9439..3d090d2d9ed9e 100644
--- a/drivers/video/fbdev/omap/omapfb_main.c
+++ b/drivers/video/fbdev/omap/omapfb_main.c
@@ -253,7 +253,7 @@ static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
 		if (fbdev->ctrl->setcolreg)
 			r = fbdev->ctrl->setcolreg(regno, red, green, blue,
 							transp, update_hw_pal);
-		/* Fallthrough */
+		fallthrough;
 	case OMAPFB_COLOR_RGB565:
 	case OMAPFB_COLOR_RGB444:
 		if (r != 0)
@@ -443,7 +443,7 @@ static int set_color_mode(struct omapfb_plane_struct *plane,
 		return 0;
 	case 12:
 		var->bits_per_pixel = 16;
-		/* fall through */
+		fallthrough;
 	case 16:
 		if (plane->fbdev->panel->bpp == 12)
 			plane->color_mode = OMAPFB_COLOR_RGB444;
@@ -1531,27 +1531,27 @@ static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
 	case OMAPFB_ACTIVE:
 		for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
 			unregister_framebuffer(fbdev->fb_info[i]);
-		/* fall through */
+		fallthrough;
 	case 7:
 		omapfb_unregister_sysfs(fbdev);
-		/* fall through */
+		fallthrough;
 	case 6:
 		if (fbdev->panel->disable)
 			fbdev->panel->disable(fbdev->panel);
-		/* fall through */
+		fallthrough;
 	case 5:
 		omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
-		/* fall through */
+		fallthrough;
 	case 4:
 		planes_cleanup(fbdev);
-		/* fall through */
+		fallthrough;
 	case 3:
 		ctrl_cleanup(fbdev);
-		/* fall through */
+		fallthrough;
 	case 2:
 		if (fbdev->panel->cleanup)
 			fbdev->panel->cleanup(fbdev->panel);
-		/* fall through */
+		fallthrough;
 	case 1:
 		dev_set_drvdata(fbdev->dev, NULL);
 		kfree(fbdev);
@@ -1854,7 +1854,7 @@ static int __init omapfb_setup(char *options)
 			case 'm':
 			case 'M':
 				vram *= 1024;
-				/* Fall through */
+				fallthrough;
 			case 'k':
 			case 'K':
 				vram *= 1024;
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/dispc.c b/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
index 3920a0db0390c..b2d6e6df21615 100644
--- a/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
+++ b/drivers/video/fbdev/omap2/omapfb/dss/dispc.c
@@ -1861,7 +1861,7 @@ static void calc_vrfb_rotation_offset(u8 rotation, bool mirror,
 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
 			color_mode == OMAP_DSS_COLOR_UYVY)
 			width = width >> 1;
-		/* fall through */
+		fallthrough;
 	case OMAP_DSS_ROT_90:
 	case OMAP_DSS_ROT_270:
 		*offset1 = 0;
@@ -1884,7 +1884,7 @@ static void calc_vrfb_rotation_offset(u8 rotation, bool mirror,
 		if (color_mode == OMAP_DSS_COLOR_YUV2 ||
 			color_mode == OMAP_DSS_COLOR_UYVY)
 			width = width >> 1;
-		/* fall through */
+		fallthrough;
 	case OMAP_DSS_ROT_90 + 4:
 	case OMAP_DSS_ROT_270 + 4:
 		*offset1 = 0;
diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c b/drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c
index f40be68d5aac9..ea8c88aa44771 100644
--- a/drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c
+++ b/drivers/video/fbdev/omap2/omapfb/omapfb-ioctl.c
@@ -760,7 +760,7 @@ int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd, unsigned long arg)
 			r = -ENODEV;
 			break;
 		}
-		/* FALLTHROUGH */
+		fallthrough;
 
 	case OMAPFB_WAITFORVSYNC:
 		DBG("ioctl WAITFORVSYNC\n");
diff --git a/drivers/video/fbdev/omap2/omapfb/omapfb-main.c b/drivers/video/fbdev/omap2/omapfb/omapfb-main.c
index 836e7b1639ce5..a3decc7fadde3 100644
--- a/drivers/video/fbdev/omap2/omapfb/omapfb-main.c
+++ b/drivers/video/fbdev/omap2/omapfb/omapfb-main.c
@@ -882,7 +882,7 @@ int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
 				/ (var->bits_per_pixel >> 2);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		screen_width = fix->line_length / (var->bits_per_pixel >> 3);
 		break;
diff --git a/drivers/video/fbdev/pm2fb.c b/drivers/video/fbdev/pm2fb.c
index c7c98d8e23592..0642555289e06 100644
--- a/drivers/video/fbdev/pm2fb.c
+++ b/drivers/video/fbdev/pm2fb.c
@@ -233,10 +233,10 @@ static u32 to3264(u32 timing, int bpp, int is64)
 	switch (bpp) {
 	case 24:
 		timing *= 3;
-		/* fall through */
+		fallthrough;
 	case 8:
 		timing >>= 1;
-		/* fall through */
+		fallthrough;
 	case 16:
 		timing >>= 1;
 	case 32:
diff --git a/drivers/video/fbdev/pxa168fb.c b/drivers/video/fbdev/pxa168fb.c
index eedfbd3572a8f..47e6a1d0d2293 100644
--- a/drivers/video/fbdev/pxa168fb.c
+++ b/drivers/video/fbdev/pxa168fb.c
@@ -60,8 +60,6 @@ static int determine_best_pix_fmt(struct fb_var_screeninfo *var)
 			else
 				return PIX_FMT_BGR1555;
 		}
-
-		/* fall through */
 	}
 
 	/*
@@ -87,8 +85,6 @@ static int determine_best_pix_fmt(struct fb_var_screeninfo *var)
 			else
 				return PIX_FMT_BGR888UNPACK;
 		}
-
-		/* fall through */
 	}
 
 	return -EINVAL;
diff --git a/drivers/video/fbdev/pxafb.c b/drivers/video/fbdev/pxafb.c
index a53d24fb71834..f1551e00eb12f 100644
--- a/drivers/video/fbdev/pxafb.c
+++ b/drivers/video/fbdev/pxafb.c
@@ -1614,7 +1614,7 @@ static void set_ctrlr_state(struct pxafb_info *fbi, u_int state)
 		 */
 		if (old_state != C_DISABLE_PM)
 			break;
-		/* fall through */
+		fallthrough;
 
 	case C_ENABLE:
 		/*
diff --git a/drivers/video/fbdev/riva/fbdev.c b/drivers/video/fbdev/riva/fbdev.c
index 9b3493846f4d9..ce55b9d2e862b 100644
--- a/drivers/video/fbdev/riva/fbdev.c
+++ b/drivers/video/fbdev/riva/fbdev.c
@@ -1093,7 +1093,7 @@ static int rivafb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 		break;
 	case 9 ... 15:
 		var->green.length = 5;
-		/* fall through */
+		fallthrough;
 	case 16:
 		var->bits_per_pixel = 16;
 		/* The Riva128 supports RGB555 only */
diff --git a/drivers/video/fbdev/s3c-fb.c b/drivers/video/fbdev/s3c-fb.c
index 9dc925054930e..ba316bd56efd7 100644
--- a/drivers/video/fbdev/s3c-fb.c
+++ b/drivers/video/fbdev/s3c-fb.c
@@ -284,7 +284,7 @@ static int s3c_fb_check_var(struct fb_var_screeninfo *var,
 		/* 666 with one bit alpha/transparency */
 		var->transp.offset	= 18;
 		var->transp.length	= 1;
-		/* fall through */
+		fallthrough;
 	case 18:
 		var->bits_per_pixel	= 32;
 
@@ -312,7 +312,7 @@ static int s3c_fb_check_var(struct fb_var_screeninfo *var,
 	case 25:
 		var->transp.length	= var->bits_per_pixel - 24;
 		var->transp.offset	= 24;
-		/* fall through */
+		fallthrough;
 	case 24:
 		/* our 24bpp is unpacked, so 32bpp */
 		var->bits_per_pixel	= 32;
@@ -809,7 +809,7 @@ static int s3c_fb_blank(int blank_mode, struct fb_info *info)
 	case FB_BLANK_POWERDOWN:
 		wincon &= ~WINCONx_ENWIN;
 		sfb->enabled &= ~(1 << index);
-		/* fall through - to FB_BLANK_NORMAL */
+		fallthrough;	/* to FB_BLANK_NORMAL */
 
 	case FB_BLANK_NORMAL:
 		/* disable the DMA and display 0x0 (black) */
diff --git a/drivers/video/fbdev/sa1100fb.c b/drivers/video/fbdev/sa1100fb.c
index bda6cc313c8b9..e31cf63b0a62d 100644
--- a/drivers/video/fbdev/sa1100fb.c
+++ b/drivers/video/fbdev/sa1100fb.c
@@ -935,7 +935,7 @@ static void set_ctrlr_state(struct sa1100fb_info *fbi, u_int state)
 		 */
 		if (old_state != C_DISABLE_PM)
 			break;
-		/* fall through */
+		fallthrough;
 
 	case C_ENABLE:
 		/*
diff --git a/drivers/video/fbdev/savage/savagefb_driver.c b/drivers/video/fbdev/savage/savagefb_driver.c
index 3fd87aeb6c798..a2442aae7e125 100644
--- a/drivers/video/fbdev/savage/savagefb_driver.c
+++ b/drivers/video/fbdev/savage/savagefb_driver.c
@@ -1860,7 +1860,7 @@ static int savage_init_hw(struct savagefb_par *par)
 		if ((vga_in8(0x3d5, par) & 0xC0) == (0x01 << 6))
 			RamSavage4[1] = 8;
 
-		/*FALLTHROUGH*/
+		fallthrough;
 
 	case S3_SAVAGE2000:
 		videoRam = RamSavage4[(config1 & 0xE0) >> 5] * 1024;
diff --git a/drivers/video/fbdev/sh_mobile_lcdcfb.c b/drivers/video/fbdev/sh_mobile_lcdcfb.c
index 8a27d12e6ea87..c1043420dbd3e 100644
--- a/drivers/video/fbdev/sh_mobile_lcdcfb.c
+++ b/drivers/video/fbdev/sh_mobile_lcdcfb.c
@@ -1594,7 +1594,7 @@ sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
 	case V4L2_PIX_FMT_NV12:
 	case V4L2_PIX_FMT_NV21:
 		info->fix.ypanstep = 2;
-		/* Fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_NV16:
 	case V4L2_PIX_FMT_NV61:
 		info->fix.xpanstep = 2;
@@ -2085,7 +2085,7 @@ sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
 	case V4L2_PIX_FMT_NV12:
 	case V4L2_PIX_FMT_NV21:
 		info->fix.ypanstep = 2;
-		/* Fall through */
+		fallthrough;
 	case V4L2_PIX_FMT_NV16:
 	case V4L2_PIX_FMT_NV61:
 		info->fix.xpanstep = 2;
diff --git a/drivers/video/fbdev/sis/sis_main.c b/drivers/video/fbdev/sis/sis_main.c
index ac140962b1bfb..03c736f6f3d08 100644
--- a/drivers/video/fbdev/sis/sis_main.c
+++ b/drivers/video/fbdev/sis/sis_main.c
@@ -1739,7 +1739,7 @@ static int	sisfb_ioctl(struct fb_info *info, unsigned int cmd,
 		if(ivideo->warncount++ < 10)
 			printk(KERN_INFO
 				"sisfb: Deprecated ioctl call received - update your application!\n");
-		/* fall through */
+		fallthrough;
 	   case SISFB_GET_INFO:  /* For communication with X driver */
 		ivideo->sisfb_infoblock.sisfb_id         = SISFB_ID;
 		ivideo->sisfb_infoblock.sisfb_version    = VER_MAJOR;
@@ -1793,7 +1793,7 @@ static int	sisfb_ioctl(struct fb_info *info, unsigned int cmd,
 		if(ivideo->warncount++ < 10)
 			printk(KERN_INFO
 				"sisfb: Deprecated ioctl call received - update your application!\n");
-		/* fall through */
+		fallthrough;
 	   case SISFB_GET_VBRSTATUS:
 		if(sisfb_CheckVBRetrace(ivideo))
 			return put_user((u32)1, argp);
@@ -1804,7 +1804,7 @@ static int	sisfb_ioctl(struct fb_info *info, unsigned int cmd,
 		if(ivideo->warncount++ < 10)
 			printk(KERN_INFO
 				"sisfb: Deprecated ioctl call received - update your application!\n");
-		/* fall through */
+		fallthrough;
 	   case SISFB_GET_AUTOMAXIMIZE:
 		if(ivideo->sisfb_max)
 			return put_user((u32)1, argp);
@@ -1815,7 +1815,7 @@ static int	sisfb_ioctl(struct fb_info *info, unsigned int cmd,
 		if(ivideo->warncount++ < 10)
 			printk(KERN_INFO
 				"sisfb: Deprecated ioctl call received - update your application!\n");
-		/* fall through */
+		fallthrough;
 	   case SISFB_SET_AUTOMAXIMIZE:
 		if(get_user(gpu32, argp))
 			return -EFAULT;
diff --git a/drivers/video/fbdev/sm501fb.c b/drivers/video/fbdev/sm501fb.c
index 3dd1b1d76e983..6a52eba645596 100644
--- a/drivers/video/fbdev/sm501fb.c
+++ b/drivers/video/fbdev/sm501fb.c
@@ -1005,7 +1005,7 @@ static int sm501fb_blank_crt(int blank_mode, struct fb_info *info)
 	case FB_BLANK_POWERDOWN:
 		ctrl &= ~SM501_DC_CRT_CONTROL_ENABLE;
 		sm501_misc_control(fbi->dev->parent, SM501_MISC_DAC_POWER, 0);
-		/* fall through */
+		fallthrough;
 
 	case FB_BLANK_NORMAL:
 		ctrl |= SM501_DC_CRT_CONTROL_BLANK;
diff --git a/drivers/video/fbdev/stifb.c b/drivers/video/fbdev/stifb.c
index de953ddb63124..265865610edc6 100644
--- a/drivers/video/fbdev/stifb.c
+++ b/drivers/video/fbdev/stifb.c
@@ -999,7 +999,7 @@ stifb_blank(int blank_mode, struct fb_info *info)
 	case S9000_ID_HCRX:
 		HYPER_ENABLE_DISABLE_DISPLAY(fb, enable);
 		break;
-	case S9000_ID_A1659A:	/* fall through */
+	case S9000_ID_A1659A:
 	case S9000_ID_TIMBER:
 	case CRX24_OVERLAY_PLANES:
 	default:
@@ -1157,7 +1157,7 @@ static int __init stifb_init_fb(struct sti_struct *sti, int bpp_pref)
 			dev_name);
 		   goto out_err0;
 		}
-		/* fall through */
+		fallthrough;
 	case S9000_ID_ARTIST:
 	case S9000_ID_HCRX:
 	case S9000_ID_TIMBER:
diff --git a/drivers/video/fbdev/tdfxfb.c b/drivers/video/fbdev/tdfxfb.c
index f73e26c18c090..f056d80f6359f 100644
--- a/drivers/video/fbdev/tdfxfb.c
+++ b/drivers/video/fbdev/tdfxfb.c
@@ -523,7 +523,7 @@ static int tdfxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 	case 32:
 		var->transp.offset = 24;
 		var->transp.length = 8;
-		/* fall through */
+		fallthrough;
 	case 24:
 		var->red.offset = 16;
 		var->green.offset = 8;
diff --git a/drivers/video/fbdev/via/lcd.c b/drivers/video/fbdev/via/lcd.c
index 3fea01db58d63..4a869402d120d 100644
--- a/drivers/video/fbdev/via/lcd.c
+++ b/drivers/video/fbdev/via/lcd.c
@@ -744,7 +744,7 @@ static void set_lcd_output_path(int set_iga, int output_interface)
 		    viaparinfo->chip_info->gfx_chip_name))
 			viafb_write_reg_mask(CR97, VIACR, 0x84,
 				       BIT7 + BIT2 + BIT1 + BIT0);
-		/* fall through */
+		fallthrough;
 	case INTERFACE_DVP0:
 	case INTERFACE_DVP1:
 	case INTERFACE_DFP_HIGH:
diff --git a/drivers/video/fbdev/xen-fbfront.c b/drivers/video/fbdev/xen-fbfront.c
index 00307b8693bf5..5ec51445bee88 100644
--- a/drivers/video/fbdev/xen-fbfront.c
+++ b/drivers/video/fbdev/xen-fbfront.c
@@ -677,7 +677,7 @@ static void xenfb_backend_changed(struct xenbus_device *dev,
 	case XenbusStateClosed:
 		if (dev->state == XenbusStateClosed)
 			break;
-		/* fall through - Missed the backend's CLOSING state. */
+		fallthrough;	/* Missed the backend's CLOSING state */
 	case XenbusStateClosing:
 		xenbus_frontend_closed(dev);
 		break;
diff --git a/drivers/watchdog/sc1200wdt.c b/drivers/watchdog/sc1200wdt.c
index 9673eb12dacd0..f22ebe89fe137 100644
--- a/drivers/watchdog/sc1200wdt.c
+++ b/drivers/watchdog/sc1200wdt.c
@@ -234,7 +234,7 @@ static long sc1200wdt_ioctl(struct file *file, unsigned int cmd,
 			return -EINVAL;
 		timeout = new_timeout;
 		sc1200wdt_write_data(WDTO, timeout);
-		/* fall through - and return the new timeout */
+		fallthrough;	/* and return the new timeout */
 
 	case WDIOC_GETTIMEOUT:
 		return put_user(timeout * 60, p);
diff --git a/drivers/watchdog/wdrtas.c b/drivers/watchdog/wdrtas.c
index 184a06a74f83a..c00627825de88 100644
--- a/drivers/watchdog/wdrtas.c
+++ b/drivers/watchdog/wdrtas.c
@@ -332,7 +332,7 @@ static long wdrtas_ioctl(struct file *file, unsigned int cmd,
 			wdrtas_interval = i;
 		else
 			wdrtas_interval = wdrtas_get_interval(i);
-		/* fallthrough */
+		fallthrough;
 
 	case WDIOC_GETTIMEOUT:
 		return put_user(wdrtas_interval, argp);
diff --git a/drivers/xen/pvcalls-front.c b/drivers/xen/pvcalls-front.c
index b43b5595e9880..72d725a0ab5ce 100644
--- a/drivers/xen/pvcalls-front.c
+++ b/drivers/xen/pvcalls-front.c
@@ -1263,7 +1263,7 @@ static void pvcalls_front_changed(struct xenbus_device *dev,
 		if (dev->state == XenbusStateClosed)
 			break;
 		/* Missed the backend's CLOSING state */
-		/* fall through */
+		fallthrough;
 	case XenbusStateClosing:
 		xenbus_frontend_closed(dev);
 		break;
diff --git a/drivers/xen/xen-acpi-memhotplug.c b/drivers/xen/xen-acpi-memhotplug.c
index 7457213b89156..f914b72557efb 100644
--- a/drivers/xen/xen-acpi-memhotplug.c
+++ b/drivers/xen/xen-acpi-memhotplug.c
@@ -229,7 +229,7 @@ static void acpi_memory_device_notify(acpi_handle handle, u32 event, void *data)
 	case ACPI_NOTIFY_BUS_CHECK:
 		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
 			"\nReceived BUS CHECK notification for device\n"));
-		/* Fall Through */
+		fallthrough;
 	case ACPI_NOTIFY_DEVICE_CHECK:
 		if (event == ACPI_NOTIFY_DEVICE_CHECK)
 			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
diff --git a/drivers/xen/xen-pciback/xenbus.c b/drivers/xen/xen-pciback/xenbus.c
index f2115587855f7..b500466a6c371 100644
--- a/drivers/xen/xen-pciback/xenbus.c
+++ b/drivers/xen/xen-pciback/xenbus.c
@@ -545,7 +545,7 @@ static void xen_pcibk_frontend_changed(struct xenbus_device *xdev,
 		xenbus_switch_state(xdev, XenbusStateClosed);
 		if (xenbus_dev_is_online(xdev))
 			break;
-		/* fall through - if not online */
+		fallthrough;	/* if not online */
 	case XenbusStateUnknown:
 		dev_dbg(&xdev->dev, "frontend is gone! unregister device\n");
 		device_unregister(&xdev->dev);
diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index 75c0a2e9a6db5..1e8cfd80a4e6b 100644
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -1185,7 +1185,7 @@ static void scsiback_frontend_changed(struct xenbus_device *dev,
 		xenbus_switch_state(dev, XenbusStateClosed);
 		if (xenbus_dev_is_online(dev))
 			break;
-		/* fall through - if not online */
+		fallthrough;	/* if not online */
 	case XenbusStateUnknown:
 		device_unregister(&dev->dev);
 		break;
diff --git a/drivers/xen/xenbus/xenbus_probe_frontend.c b/drivers/xen/xenbus/xenbus_probe_frontend.c
index 15379089853ba..480944606a3c9 100644
--- a/drivers/xen/xenbus/xenbus_probe_frontend.c
+++ b/drivers/xen/xenbus/xenbus_probe_frontend.c
@@ -401,12 +401,12 @@ static void xenbus_reset_frontend(char *fe, char *be, int be_state)
 	case XenbusStateConnected:
 		xenbus_printf(XBT_NIL, fe, "state", "%d", XenbusStateClosing);
 		xenbus_reset_wait_for_backend(be, XenbusStateClosing);
-		/* fall through */
+		fallthrough;
 
 	case XenbusStateClosing:
 		xenbus_printf(XBT_NIL, fe, "state", "%d", XenbusStateClosed);
 		xenbus_reset_wait_for_backend(be, XenbusStateClosed);
-		/* fall through */
+		fallthrough;
 
 	case XenbusStateClosed:
 		xenbus_printf(XBT_NIL, fe, "state", "%d", XenbusStateInitialising);
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index 92cd1d80218d7..3576123d82990 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -213,7 +213,7 @@ static int v9fs_file_do_lock(struct file *filp, int cmd, struct file_lock *fl)
 		break;
 	default:
 		WARN_ONCE(1, "unknown lock status code: %d\n", status);
-		/* fall through */
+		fallthrough;
 	case P9_LOCK_ERROR:
 	case P9_LOCK_GRACE:
 		res = -ENOLCK;
diff --git a/fs/adfs/dir_f.c b/fs/adfs/dir_f.c
index 30d526fecc3f4..05e963402e25f 100644
--- a/fs/adfs/dir_f.c
+++ b/fs/adfs/dir_f.c
@@ -18,11 +18,11 @@ static inline unsigned int adfs_readval(unsigned char *p, int len)
 
 	switch (len) {
 	case 4:		val |= p[3] << 24;
-			/* fall through */
+		fallthrough;
 	case 3:		val |= p[2] << 16;
-			/* fall through */
+		fallthrough;
 	case 2:		val |= p[1] << 8;
-			/* fall through */
+		fallthrough;
 	default:	val |= p[0];
 	}
 	return val;
@@ -32,11 +32,11 @@ static inline void adfs_writeval(unsigned char *p, int len, unsigned int val)
 {
 	switch (len) {
 	case 4:		p[3] = val >> 24;
-			/* fall through */
+		fallthrough;
 	case 3:		p[2] = val >> 16;
-			/* fall through */
+		fallthrough;
 	case 2:		p[1] = val >> 8;
-			/* fall through */
+		fallthrough;
 	default:	p[0] = val;
 	}
 }
diff --git a/fs/affs/inode.c b/fs/affs/inode.c
index a346cf7659f19..044412110b523 100644
--- a/fs/affs/inode.c
+++ b/fs/affs/inode.c
@@ -93,7 +93,7 @@ struct inode *affs_iget(struct super_block *sb, unsigned long ino)
 	case ST_ROOT:
 		inode->i_uid = sbi->s_uid;
 		inode->i_gid = sbi->s_gid;
-		/* fall through */
+		fallthrough;
 	case ST_USERDIR:
 		if (be32_to_cpu(tail->stype) == ST_USERDIR ||
 		    affs_test_opt(sbi->s_flags, SF_SETMODE)) {
diff --git a/fs/affs/super.c b/fs/affs/super.c
index 47107c6712a61..a100cd9950c88 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -474,7 +474,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 	case MUFS_INTLFFS:
 	case MUFS_DCFFS:
 		affs_set_opt(sbi->s_flags, SF_MUFS);
-		/* fall thru */
+		fallthrough;
 	case FS_INTLFFS:
 	case FS_DCFFS:
 		affs_set_opt(sbi->s_flags, SF_INTL);
@@ -486,7 +486,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 		break;
 	case MUFS_OFS:
 		affs_set_opt(sbi->s_flags, SF_MUFS);
-		/* fall through */
+		fallthrough;
 	case FS_OFS:
 		affs_set_opt(sbi->s_flags, SF_OFS);
 		sb->s_flags |= SB_NOEXEC;
@@ -494,7 +494,7 @@ static int affs_fill_super(struct super_block *sb, void *data, int silent)
 	case MUFS_DCOFS:
 	case MUFS_INTLOFS:
 		affs_set_opt(sbi->s_flags, SF_MUFS);
-		/* fall through */
+		fallthrough;
 	case FS_DCOFS:
 	case FS_INTLOFS:
 		affs_set_opt(sbi->s_flags, SF_INTL);
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index bef413818af73..a4e9e6e07e939 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -252,7 +252,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		call->unmarshall++;
 
 		/* extract the FID array and its count in two steps */
-		/* fall through */
+		fallthrough;
 	case 1:
 		_debug("extract FID count");
 		ret = afs_extract_data(call, true);
@@ -271,7 +271,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		afs_extract_to_buf(call, call->count * 3 * 4);
 		call->unmarshall++;
 
-		/* Fall through */
+		fallthrough;
 	case 2:
 		_debug("extract FID array");
 		ret = afs_extract_data(call, true);
@@ -297,7 +297,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		call->unmarshall++;
 
 		/* extract the callback array and its count in two steps */
-		/* fall through */
+		fallthrough;
 	case 3:
 		_debug("extract CB count");
 		ret = afs_extract_data(call, true);
@@ -312,7 +312,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		iov_iter_discard(&call->def_iter, READ, call->count2 * 3 * 4);
 		call->unmarshall++;
 
-		/* Fall through */
+		fallthrough;
 	case 4:
 		_debug("extract discard %zu/%u",
 		       iov_iter_count(call->iter), call->count2 * 3 * 4);
@@ -391,7 +391,7 @@ static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
 		afs_extract_to_buf(call, 11 * sizeof(__be32));
 		call->unmarshall++;
 
-		/* Fall through */
+		fallthrough;
 	case 1:
 		_debug("extract UUID");
 		ret = afs_extract_data(call, false);
@@ -503,7 +503,7 @@ static int afs_deliver_cb_probe_uuid(struct afs_call *call)
 		afs_extract_to_buf(call, 11 * sizeof(__be32));
 		call->unmarshall++;
 
-		/* Fall through */
+		fallthrough;
 	case 1:
 		_debug("extract UUID");
 		ret = afs_extract_data(call, false);
@@ -618,7 +618,7 @@ static int afs_deliver_yfs_cb_callback(struct afs_call *call)
 		call->unmarshall++;
 
 		/* extract the FID array and its count in two steps */
-		/* Fall through */
+		fallthrough;
 	case 1:
 		_debug("extract FID count");
 		ret = afs_extract_data(call, true);
@@ -637,7 +637,7 @@ static int afs_deliver_yfs_cb_callback(struct afs_call *call)
 		afs_extract_to_buf(call, size);
 		call->unmarshall++;
 
-		/* Fall through */
+		fallthrough;
 	case 2:
 		_debug("extract FID array");
 		ret = afs_extract_data(call, false);
diff --git a/fs/afs/file.c b/fs/afs/file.c
index 6f6ed1605cfe3..371d1488cc549 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -311,7 +311,7 @@ int afs_page_filler(void *data, struct page *page)
 	case -ENOBUFS:
 		_debug("cache said ENOBUFS");
 
-		/* fall through */
+		fallthrough;
 	default:
 	go_on:
 		req = kzalloc(struct_size(req, array, 1), GFP_KERNEL);
diff --git a/fs/afs/flock.c b/fs/afs/flock.c
index ffb8575345ca7..eff82a6839e4c 100644
--- a/fs/afs/flock.c
+++ b/fs/afs/flock.c
@@ -376,7 +376,7 @@ void afs_lock_work(struct work_struct *work)
 		spin_unlock(&vnode->lock);
 		return;
 
-		/* Fall through */
+		fallthrough;
 	default:
 		/* Looks like a lock request was withdrawn. */
 		spin_unlock(&vnode->lock);
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index acb4d0ca26490..1d95ed9dd86e6 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -320,7 +320,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 			call->tmp_u = htonl(0);
 			afs_extract_to_tmp(call);
 		}
-		/* Fall through */
+		fallthrough;
 
 		/* extract the returned data length */
 	case 1:
@@ -348,7 +348,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 		call->bvec[0].bv_page = req->pages[req->index];
 		iov_iter_bvec(&call->def_iter, READ, call->bvec, 1, size);
 		ASSERTCMP(size, <=, PAGE_SIZE);
-		/* Fall through */
+		fallthrough;
 
 		/* extract the returned data */
 	case 2:
@@ -375,7 +375,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 		/* Discard any excess data the server gave us */
 		afs_extract_discard(call, req->actual_len - req->len);
 		call->unmarshall = 3;
-		/* Fall through */
+		fallthrough;
 
 	case 3:
 		_debug("extract discard %zu/%llu",
@@ -388,7 +388,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 	no_more_data:
 		call->unmarshall = 4;
 		afs_extract_to_buf(call, (21 + 3 + 6) * 4);
-		/* Fall through */
+		fallthrough;
 
 		/* extract the metadata */
 	case 4:
@@ -1343,7 +1343,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 	case 0:
 		call->unmarshall++;
 		afs_extract_to_buf(call, 12 * 4);
-		/* Fall through */
+		fallthrough;
 
 		/* extract the returned status record */
 	case 1:
@@ -1356,7 +1356,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		xdr_decode_AFSFetchVolumeStatus(&bp, &op->volstatus.vs);
 		call->unmarshall++;
 		afs_extract_to_tmp(call);
-		/* Fall through */
+		fallthrough;
 
 		/* extract the volume name length */
 	case 2:
@@ -1371,7 +1371,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		size = (call->count + 3) & ~3; /* It's padded */
 		afs_extract_to_buf(call, size);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the volume name */
 	case 3:
@@ -1385,7 +1385,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		_debug("volname '%s'", p);
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the offline message length */
 	case 4:
@@ -1400,7 +1400,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		size = (call->count + 3) & ~3; /* It's padded */
 		afs_extract_to_buf(call, size);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the offline message */
 	case 5:
@@ -1415,7 +1415,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the message of the day length */
 	case 6:
@@ -1430,7 +1430,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		size = (call->count + 3) & ~3; /* It's padded */
 		afs_extract_to_buf(call, size);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the message of the day */
 	case 7:
@@ -1682,7 +1682,7 @@ static int afs_deliver_fs_get_capabilities(struct afs_call *call)
 	case 0:
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* Extract the capabilities word count */
 	case 1:
@@ -1696,7 +1696,7 @@ static int afs_deliver_fs_get_capabilities(struct afs_call *call)
 		call->count2 = count;
 		afs_extract_discard(call, count * sizeof(__be32));
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* Extract capabilities words */
 	case 2:
@@ -1776,7 +1776,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	case 0:
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* Extract the file status count and array in two steps */
 	case 1:
@@ -1794,7 +1794,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->unmarshall++;
 	more_counts:
 		afs_extract_to_buf(call, 21 * sizeof(__be32));
-		/* Fall through */
+		fallthrough;
 
 	case 2:
 		_debug("extract status array %u", call->count);
@@ -1824,7 +1824,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->count = 0;
 		call->unmarshall++;
 		afs_extract_to_tmp(call);
-		/* Fall through */
+		fallthrough;
 
 		/* Extract the callback count and array in two steps */
 	case 3:
@@ -1841,7 +1841,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->unmarshall++;
 	more_cbs:
 		afs_extract_to_buf(call, 3 * sizeof(__be32));
-		/* Fall through */
+		fallthrough;
 
 	case 4:
 		_debug("extract CB array");
@@ -1870,7 +1870,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 
 		afs_extract_to_buf(call, 6 * sizeof(__be32));
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 	case 5:
 		ret = afs_extract_data(call, false);
@@ -1974,7 +1974,7 @@ static int afs_deliver_fs_fetch_acl(struct afs_call *call)
 	case 0:
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the returned data length */
 	case 1:
@@ -1992,7 +1992,7 @@ static int afs_deliver_fs_fetch_acl(struct afs_call *call)
 		acl->size = call->count2;
 		afs_extract_begin(call, acl->data, size);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the returned data */
 	case 2:
@@ -2002,7 +2002,7 @@ static int afs_deliver_fs_fetch_acl(struct afs_call *call)
 
 		afs_extract_to_buf(call, (21 + 6) * 4);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the metadata */
 	case 3:
diff --git a/fs/afs/misc.c b/fs/afs/misc.c
index 5334f1bd2bca7..1d1a8debe4723 100644
--- a/fs/afs/misc.c
+++ b/fs/afs/misc.c
@@ -120,42 +120,42 @@ void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code)
 		if (e->error == -ETIMEDOUT ||
 		    e->error == -ETIME)
 			return;
-		/* Fall through */
+		fallthrough;
 	case -ETIMEDOUT:
 	case -ETIME:
 		if (e->error == -ENOMEM ||
 		    e->error == -ENONET)
 			return;
-		/* Fall through */
+		fallthrough;
 	case -ENOMEM:
 	case -ENONET:
 		if (e->error == -ERFKILL)
 			return;
-		/* Fall through */
+		fallthrough;
 	case -ERFKILL:
 		if (e->error == -EADDRNOTAVAIL)
 			return;
-		/* Fall through */
+		fallthrough;
 	case -EADDRNOTAVAIL:
 		if (e->error == -ENETUNREACH)
 			return;
-		/* Fall through */
+		fallthrough;
 	case -ENETUNREACH:
 		if (e->error == -EHOSTUNREACH)
 			return;
-		/* Fall through */
+		fallthrough;
 	case -EHOSTUNREACH:
 		if (e->error == -EHOSTDOWN)
 			return;
-		/* Fall through */
+		fallthrough;
 	case -EHOSTDOWN:
 		if (e->error == -ECONNREFUSED)
 			return;
-		/* Fall through */
+		fallthrough;
 	case -ECONNREFUSED:
 		if (e->error == -ECONNRESET)
 			return;
-		/* Fall through */
+		fallthrough;
 	case -ECONNRESET: /* Responded, but call expired. */
 		if (e->responded)
 			return;
diff --git a/fs/afs/rotate.c b/fs/afs/rotate.c
index 6a0935cb822f3..d83f13c44b921 100644
--- a/fs/afs/rotate.c
+++ b/fs/afs/rotate.c
@@ -281,7 +281,7 @@ bool afs_select_fileserver(struct afs_operation *op)
 	case -ETIME:
 		if (op->error != -EDESTADDRREQ)
 			goto iterate_address;
-		/* Fall through */
+		fallthrough;
 	case -ERFKILL:
 	case -EADDRNOTAVAIL:
 	case -ENETUNREACH:
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 8fc8fb406a5a2..8be709cb8542a 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -568,7 +568,7 @@ static void afs_deliver_to_call(struct afs_call *call)
 		case -EIO:
 			pr_err("kAFS: Call %u in bad state %u\n",
 			       call->debug_id, state);
-			/* Fall through */
+			fallthrough;
 		case -ENODATA:
 		case -EBADMSG:
 		case -EMSGSIZE:
@@ -669,7 +669,7 @@ long afs_wait_for_call_to_complete(struct afs_call *call,
 		ret = call->ret0;
 		call->ret0 = 0;
 
-		/* Fall through */
+		fallthrough;
 	case -ECONNABORTED:
 		ac->responded = true;
 		break;
@@ -872,7 +872,7 @@ void afs_send_empty_reply(struct afs_call *call)
 		_debug("oom");
 		rxrpc_kernel_abort_call(net->socket, call->rxcall,
 					RX_USER_ABORT, -ENOMEM, "KOO");
-		/* Fall through */
+		fallthrough;
 	default:
 		_leave(" [error]");
 		return;
diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c
index fd82850cd4244..dc9327332f069 100644
--- a/fs/afs/vlclient.c
+++ b/fs/afs/vlclient.c
@@ -196,7 +196,7 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 
 		/* Extract the returned uuid, uniquifier, nentries and
 		 * blkaddrs size */
-		/* Fall through */
+		fallthrough;
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -221,7 +221,7 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 		count = min(call->count, 4U);
 		afs_extract_to_buf(call, count * sizeof(__be32));
 
-		/* Fall through - and extract entries */
+		fallthrough;	/* and extract entries */
 	case 2:
 		ret = afs_extract_data(call, call->count > 4);
 		if (ret < 0)
@@ -324,7 +324,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* Fall through - and extract the capabilities word count */
+		fallthrough;	/* and extract the capabilities word count */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -337,7 +337,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
 		call->unmarshall++;
 		afs_extract_discard(call, count * sizeof(__be32));
 
-		/* Fall through - and extract capabilities words */
+		fallthrough;	/* and extract capabilities words */
 	case 2:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -436,7 +436,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		/* Extract the returned uuid, uniquifier, fsEndpoints count and
 		 * either the first fsEndpoint type or the volEndpoints
 		 * count if there are no fsEndpoints. */
-		/* Fall through */
+		fallthrough;
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -475,7 +475,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		afs_extract_to_buf(call, size);
 		call->unmarshall = 2;
 
-		/* Fall through - and extract fsEndpoints[] entries */
+		fallthrough;	/* and extract fsEndpoints[] entries */
 	case 2:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -526,7 +526,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		 * extract the type of the next endpoint when we extract the
 		 * data of the current one, but this is the first...
 		 */
-		/* Fall through */
+		fallthrough;
 	case 3:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -552,7 +552,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		afs_extract_to_buf(call, size);
 		call->unmarshall = 4;
 
-		/* Fall through - and extract volEndpoints[] entries */
+		fallthrough;	/* and extract volEndpoints[] entries */
 	case 4:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -587,7 +587,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		afs_extract_discard(call, 0);
 		call->unmarshall = 5;
 
-		/* Fall through - Done */
+		fallthrough;	/* Done */
 	case 5:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -663,7 +663,7 @@ static int afs_deliver_yfsvl_get_cell_name(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* Fall through - and extract the cell name length */
+		fallthrough;	/* and extract the cell name length */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -685,7 +685,7 @@ static int afs_deliver_yfsvl_get_cell_name(struct afs_call *call)
 		afs_extract_begin(call, cell_name, namesz);
 		call->unmarshall++;
 
-		/* Fall through - and extract cell name */
+		fallthrough;	/* and extract cell name */
 	case 2:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -694,7 +694,7 @@ static int afs_deliver_yfsvl_get_cell_name(struct afs_call *call)
 		afs_extract_discard(call, call->count2);
 		call->unmarshall++;
 
-		/* Fall through - and extract padding */
+		fallthrough;	/* and extract padding */
 	case 3:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
diff --git a/fs/afs/write.c b/fs/afs/write.c
index a121c247d95a3..4b2265cb18917 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -609,7 +609,7 @@ static int afs_write_back_from_locked_page(struct address_space *mapping,
 
 	default:
 		pr_notice("kAFS: Unexpected error from FS.StoreData %d\n", ret);
-		/* Fall through */
+		fallthrough;
 	case -EACCES:
 	case -EPERM:
 	case -ENOKEY:
diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c
index 8c24fdc899e37..3b1239b7e90d8 100644
--- a/fs/afs/yfsclient.c
+++ b/fs/afs/yfsclient.c
@@ -373,7 +373,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		req->offset = req->pos & (PAGE_SIZE - 1);
 		afs_extract_to_tmp64(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the returned data length */
 	case 1:
@@ -401,7 +401,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		call->bvec[0].bv_page = req->pages[req->index];
 		iov_iter_bvec(&call->def_iter, READ, call->bvec, 1, size);
 		ASSERTCMP(size, <=, PAGE_SIZE);
-		/* Fall through */
+		fallthrough;
 
 		/* extract the returned data */
 	case 2:
@@ -428,7 +428,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		/* Discard any excess data the server gave us */
 		afs_extract_discard(call, req->actual_len - req->len);
 		call->unmarshall = 3;
-		/* Fall through */
+		fallthrough;
 
 	case 3:
 		_debug("extract discard %zu/%llu",
@@ -444,7 +444,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
 				   sizeof(struct yfs_xdr_YFSCallBack) +
 				   sizeof(struct yfs_xdr_YFSVolSync));
-		/* Fall through */
+		fallthrough;
 
 		/* extract the metadata */
 	case 4:
@@ -461,7 +461,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		req->file_size = vp->scb.status.size;
 
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 	case 5:
 		break;
@@ -1262,7 +1262,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 	case 0:
 		call->unmarshall++;
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
-		/* Fall through */
+		fallthrough;
 
 		/* extract the returned status record */
 	case 1:
@@ -1275,7 +1275,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		xdr_decode_YFSFetchVolumeStatus(&bp, &op->volstatus.vs);
 		call->unmarshall++;
 		afs_extract_to_tmp(call);
-		/* Fall through */
+		fallthrough;
 
 		/* extract the volume name length */
 	case 2:
@@ -1290,7 +1290,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		size = (call->count + 3) & ~3; /* It's padded */
 		afs_extract_to_buf(call, size);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the volume name */
 	case 3:
@@ -1304,7 +1304,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		_debug("volname '%s'", p);
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the offline message length */
 	case 4:
@@ -1319,7 +1319,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		size = (call->count + 3) & ~3; /* It's padded */
 		afs_extract_to_buf(call, size);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the offline message */
 	case 5:
@@ -1334,7 +1334,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the message of the day length */
 	case 6:
@@ -1349,7 +1349,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		size = (call->count + 3) & ~3; /* It's padded */
 		afs_extract_to_buf(call, size);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the message of the day */
 	case 7:
@@ -1363,7 +1363,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		_debug("motd '%s'", p);
 
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 	case 8:
 		break;
@@ -1622,7 +1622,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	case 0:
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* Extract the file status count and array in two steps */
 	case 1:
@@ -1640,7 +1640,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->unmarshall++;
 	more_counts:
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
-		/* Fall through */
+		fallthrough;
 
 	case 2:
 		_debug("extract status array %u", call->count);
@@ -1670,7 +1670,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->count = 0;
 		call->unmarshall++;
 		afs_extract_to_tmp(call);
-		/* Fall through */
+		fallthrough;
 
 		/* Extract the callback count and array in two steps */
 	case 3:
@@ -1687,7 +1687,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->unmarshall++;
 	more_cbs:
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
-		/* Fall through */
+		fallthrough;
 
 	case 4:
 		_debug("extract CB array");
@@ -1716,7 +1716,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 	case 5:
 		ret = afs_extract_data(call, false);
@@ -1727,7 +1727,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		xdr_decode_YFSVolSync(&bp, &op->volsync);
 
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 	case 6:
 		break;
@@ -1804,7 +1804,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
 	case 0:
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* Extract the file ACL length */
 	case 1:
@@ -1826,7 +1826,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
 			afs_extract_discard(call, size);
 		}
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* Extract the file ACL */
 	case 2:
@@ -1836,7 +1836,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
 
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* Extract the volume ACL length */
 	case 3:
@@ -1858,7 +1858,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
 			afs_extract_discard(call, size);
 		}
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* Extract the volume ACL */
 	case 4:
@@ -1871,7 +1871,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
 				   sizeof(struct yfs_xdr_YFSFetchStatus) +
 				   sizeof(struct yfs_xdr_YFSVolSync));
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 		/* extract the metadata */
 	case 5:
@@ -1886,7 +1886,7 @@ static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
 		xdr_decode_YFSVolSync(&bp, &op->volsync);
 
 		call->unmarshall++;
-		/* Fall through */
+		fallthrough;
 
 	case 6:
 		break;
diff --git a/fs/aio.c b/fs/aio.c
index 5736bff48e9e9..d5ec303855669 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1511,7 +1511,7 @@ static inline void aio_rw_done(struct kiocb *req, ssize_t ret)
 		 * may be already running. Just fail this IO with EINTR.
 		 */
 		ret = -EINTR;
-		/*FALLTHRU*/
+		fallthrough;
 	default:
 		req->ki_complete(req, ret, 0);
 	}
diff --git a/fs/buffer.c b/fs/buffer.c
index d468ed9981e06..50bbc99e3d960 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1958,7 +1958,7 @@ iomap_to_bh(struct inode *inode, sector_t block, struct buffer_head *bh,
 		 */
 		set_buffer_new(bh);
 		set_buffer_unwritten(bh);
-		/* FALLTHRU */
+		fallthrough;
 	case IOMAP_MAPPED:
 		if ((iomap->flags & IOMAP_F_NEW) ||
 		    offset >= i_size_read(inode))
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 060bdcc5ce32c..9ff9d10a60ff3 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1745,7 +1745,7 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
 			case -ENOENT:
 				if (d_really_is_negative(dentry))
 					valid = 1;
-				/* Fallthrough */
+				fallthrough;
 			default:
 				break;
 			}
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index d51c3f2fdca02..30cd00265181c 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -252,7 +252,7 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
 	case S_IFREG:
 		ceph_fscache_register_inode_cookie(inode);
 		ceph_fscache_file_set_cookie(inode, file);
-		/* fall through */
+		fallthrough;
 	case S_IFDIR:
 		ret = ceph_init_file_info(inode, file, fmode,
 						S_ISDIR(inode->i_mode));
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 0e763d2dcf166..0496934feecb7 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -581,7 +581,7 @@ should_set_ext_sec_flag(enum securityEnum sectype)
 		if (global_secflags &
 		    (CIFSSEC_MAY_KRB5 | CIFSSEC_MAY_NTLMSSP))
 			return true;
-		/* Fallthrough */
+		fallthrough;
 	default:
 		return false;
 	}
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index a275ee399dcea..51c6b7880a708 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1378,25 +1378,25 @@ static int cifs_parse_security_flavors(char *value,
 		return 1;
 	case Opt_sec_krb5i:
 		vol->sign = true;
-		/* Fallthrough */
+		fallthrough;
 	case Opt_sec_krb5:
 		vol->sectype = Kerberos;
 		break;
 	case Opt_sec_ntlmsspi:
 		vol->sign = true;
-		/* Fallthrough */
+		fallthrough;
 	case Opt_sec_ntlmssp:
 		vol->sectype = RawNTLMSSP;
 		break;
 	case Opt_sec_ntlmi:
 		vol->sign = true;
-		/* Fallthrough */
+		fallthrough;
 	case Opt_ntlm:
 		vol->sectype = NTLM;
 		break;
 	case Opt_sec_ntlmv2i:
 		vol->sign = true;
-		/* Fallthrough */
+		fallthrough;
 	case Opt_sec_ntlmv2:
 		vol->sectype = NTLMv2;
 		break;
@@ -2187,7 +2187,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
 				vol->password = NULL;
 				break;
 			}
-			/* Fallthrough - to Opt_pass below.*/
+			fallthrough;	/* to Opt_pass below */
 		case Opt_pass:
 			/* Obtain the value string */
 			value = strchr(data, '=');
diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index 69cd5856621b8..de564368a887c 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -798,7 +798,7 @@ cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
 			if ((server->sec_kerberos || server->sec_mskerberos) &&
 			    (global_secflags & CIFSSEC_MAY_KRB5))
 				return Kerberos;
-			/* Fallthrough */
+			fallthrough;
 		default:
 			return Unspecified;
 		}
@@ -815,7 +815,7 @@ cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
 		default:
 			break;
 		}
-		/* Fallthrough - to attempt LANMAN authentication next */
+		fallthrough;	/* to attempt LANMAN authentication next */
 	case CIFS_NEGFLAVOR_LANMAN:
 		switch (requested) {
 		case LANMAN:
@@ -823,7 +823,7 @@ cifs_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
 		case Unspecified:
 			if (global_secflags & CIFSSEC_MAY_LANMAN)
 				return LANMAN;
-			/* Fallthrough */
+			fallthrough;
 		default:
 			return Unspecified;
 		}
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 667d70aa335fc..96c172d94fba4 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -1101,7 +1101,7 @@ smb2_select_sectype(struct TCP_Server_Info *server, enum securityEnum requested)
 		if ((server->sec_kerberos || server->sec_mskerberos) &&
 			(global_secflags & CIFSSEC_MAY_KRB5))
 			return Kerberos;
-		/* Fallthrough */
+		fallthrough;
 	default:
 		return Unspecified;
 	}
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index cb733652ecca6..ca22737272258 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1688,11 +1688,11 @@ static loff_t configfs_dir_lseek(struct file *file, loff_t offset, int whence)
 	switch (whence) {
 		case 1:
 			offset += file->f_pos;
-			/* fall through */
+			fallthrough;
 		case 0:
 			if (offset >= 0)
 				break;
-			/* fall through */
+			fallthrough;
 		default:
 			return -EINVAL;
 	}
diff --git a/fs/dax.c b/fs/dax.c
index 95341af1a9660..994ab66a99071 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1367,7 +1367,7 @@ static vm_fault_t dax_iomap_pte_fault(struct vm_fault *vmf, pfn_t *pfnp,
 			ret = dax_load_hole(&xas, mapping, &entry, vmf);
 			goto finish_iomap;
 		}
-		/*FALLTHRU*/
+		fallthrough;
 	default:
 		WARN_ON_ONCE(1);
 		error = -EIO;
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 18d81599522f3..002123efc6b05 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -5817,7 +5817,7 @@ int dlm_user_request(struct dlm_ls *ls, struct dlm_user_args *ua,
 		break;
 	case -EAGAIN:
 		error = 0;
-		/* fall through */
+		fallthrough;
 	default:
 		__put_lkb(ls, lkb);
 		goto out;
diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c
index 7d40d78ea8648..ae325541884e3 100644
--- a/fs/erofs/zmap.c
+++ b/fs/erofs/zmap.c
@@ -359,7 +359,7 @@ static int z_erofs_extent_lookback(struct z_erofs_maprecorder *m,
 		return z_erofs_extent_lookback(m, m->delta[0]);
 	case Z_EROFS_VLE_CLUSTER_TYPE_PLAIN:
 		map->m_flags &= ~EROFS_MAP_ZIPPED;
-		/* fallthrough */
+		fallthrough;
 	case Z_EROFS_VLE_CLUSTER_TYPE_HEAD:
 		map->m_la = (lcn << lclusterbits) | m->clusterofs;
 		break;
@@ -416,7 +416,7 @@ int z_erofs_map_blocks_iter(struct inode *inode,
 	case Z_EROFS_VLE_CLUSTER_TYPE_PLAIN:
 		if (endoff >= m.clusterofs)
 			map->m_flags &= ~EROFS_MAP_ZIPPED;
-		/* fallthrough */
+		fallthrough;
 	case Z_EROFS_VLE_CLUSTER_TYPE_HEAD:
 		if (endoff >= m.clusterofs) {
 			map->m_la = (m.lcn << lclusterbits) | m.clusterofs;
@@ -433,7 +433,7 @@ int z_erofs_map_blocks_iter(struct inode *inode,
 		end = (m.lcn << lclusterbits) | m.clusterofs;
 		map->m_flags |= EROFS_MAP_FULL_MAPPED;
 		m.delta[0] = 1;
-		/* fallthrough */
+		fallthrough;
 	case Z_EROFS_VLE_CLUSTER_TYPE_NONHEAD:
 		/* get the correspoinding first chunk */
 		err = z_erofs_extent_lookback(&m, m.delta[0]);
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index 80662e1f7889f..415c21f0e7508 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1241,7 +1241,7 @@ static void __ext2_truncate_blocks(struct inode *inode, loff_t offset)
 				mark_inode_dirty(inode);
 				ext2_free_branches(inode, &nr, &nr+1, 1);
 			}
-			/* fall through */
+			fallthrough;
 		case EXT2_IND_BLOCK:
 			nr = i_data[EXT2_DIND_BLOCK];
 			if (nr) {
@@ -1249,7 +1249,7 @@ static void __ext2_truncate_blocks(struct inode *inode, loff_t offset)
 				mark_inode_dirty(inode);
 				ext2_free_branches(inode, &nr, &nr+1, 2);
 			}
-			/* fall through */
+			fallthrough;
 		case EXT2_DIND_BLOCK:
 			nr = i_data[EXT2_TIND_BLOCK];
 			if (nr) {
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index dda860562ca34..7fab2b3b5b398 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -587,7 +587,7 @@ static int parse_options(char *options, struct super_block *sb,
 		case Opt_xip:
 			ext2_msg(sb, KERN_INFO, "use dax instead of xip");
 			set_opt(opts->s_mount_opt, XIP);
-			/* Fall through */
+			fallthrough;
 		case Opt_dax:
 #ifdef CONFIG_FS_DAX
 			ext2_msg(sb, KERN_WARNING,
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 16322ea5b4630..d9e52a7f3702f 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -2646,7 +2646,7 @@ static inline void __mark_inode_dirty_flag(struct inode *inode,
 	case FI_NEW_INODE:
 		if (set)
 			return;
-		/* fall through */
+		fallthrough;
 	case FI_DATA_EXIST:
 	case FI_INLINE_DOTS:
 	case FI_PIN_FILE:
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 9bbaa2614679f..3ad7bdbda5ca1 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -618,10 +618,10 @@ pgoff_t f2fs_get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs)
 	switch (dn->max_level) {
 	case 3:
 		base += 2 * indirect_blks;
-		/* fall through */
+		fallthrough;
 	case 2:
 		base += 2 * direct_blks;
-		/* fall through */
+		fallthrough;
 	case 1:
 		base += direct_index;
 		break;
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 2e4c0fa2074b0..19ac5baad50fd 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -362,7 +362,7 @@ static long do_fcntl(int fd, unsigned int cmd, unsigned long arg,
 	case F_OFD_SETLK:
 	case F_OFD_SETLKW:
 #endif
-		/* Fallthrough */
+		fallthrough;
 	case F_SETLK:
 	case F_SETLKW:
 		if (copy_from_user(&flock, argp, sizeof(flock)))
@@ -771,7 +771,7 @@ static void send_sigio_to_task(struct task_struct *p,
 			if (!do_send_sig_info(signum, &si, p, type))
 				break;
 		}
-		/* fall-through - fall back on the old plain SIGIO signal */
+			fallthrough;	/* fall back on the old plain SIGIO signal */
 		case 0:
 			do_send_sig_info(SIGIO, SEND_SIG_PRIV, p, type);
 	}
diff --git a/fs/fs_context.c b/fs/fs_context.c
index 7d5c5dd2b1d5a..2834d1afa6e80 100644
--- a/fs/fs_context.c
+++ b/fs/fs_context.c
@@ -521,7 +521,7 @@ static int legacy_parse_param(struct fs_context *fc, struct fs_parameter *param)
 	switch (param->type) {
 	case fs_value_is_string:
 		len = 1 + param->size;
-		/* Fall through */
+		fallthrough;
 	case fs_value_is_flag:
 		len += strlen(param->key);
 		break;
diff --git a/fs/fsopen.c b/fs/fsopen.c
index 2fa3f241b7621..27a890aa493ab 100644
--- a/fs/fsopen.c
+++ b/fs/fsopen.c
@@ -412,7 +412,7 @@ SYSCALL_DEFINE5(fsconfig,
 		break;
 	case FSCONFIG_SET_PATH_EMPTY:
 		lookup_flags = LOOKUP_EMPTY;
-		/* fallthru */
+		fallthrough;
 	case FSCONFIG_SET_PATH:
 		param.type = fs_value_is_filename;
 		param.name = getname_flags(_value, lookup_flags, NULL);
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 770f3a720db9a..0f69fbd4af664 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -746,7 +746,7 @@ static int gfs2_iomap_alloc(struct inode *inode, struct iomap *iomap,
 			}
 			if (n == 0)
 				break;
-		/* fall through - To branching from existing tree */
+			fallthrough;	/* To branching from existing tree */
 		case ALLOC_GROW_DEPTH:
 			if (i > 1 && i < mp->mp_fheight)
 				gfs2_trans_add_meta(ip->i_gl, mp->mp_bh[i-1]);
@@ -757,7 +757,7 @@ static int gfs2_iomap_alloc(struct inode *inode, struct iomap *iomap,
 				state = ALLOC_DATA;
 			if (n == 0)
 				break;
-		/* fall through - To tree complete, adding data blocks */
+			fallthrough;	/* To tree complete, adding data blocks */
 		case ALLOC_DATA:
 			BUG_ON(n > dblks);
 			BUG_ON(mp->mp_bh[end_of_metadata] == NULL);
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 4b67d47a7e004..6e173ae378c44 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -1599,7 +1599,7 @@ static int gfs2_quota_get_state(struct super_block *sb, struct qc_state *state)
 	case GFS2_QUOTA_ON:
 		state->s_state[USRQUOTA].flags |= QCI_LIMITS_ENFORCED;
 		state->s_state[GRPQUOTA].flags |= QCI_LIMITS_ENFORCED;
-		/*FALLTHRU*/
+		fallthrough;
 	case GFS2_QUOTA_ACCOUNT:
 		state->s_state[USRQUOTA].flags |= QCI_ACCT_ENABLED |
 						  QCI_SYSFILE;
diff --git a/fs/hfsplus/wrapper.c b/fs/hfsplus/wrapper.c
index 61eec628805de..0350dc7821bf9 100644
--- a/fs/hfsplus/wrapper.c
+++ b/fs/hfsplus/wrapper.c
@@ -195,7 +195,7 @@ int hfsplus_read_wrapper(struct super_block *sb)
 	switch (sbi->s_vhdr->signature) {
 	case cpu_to_be16(HFSPLUS_VOLHEAD_SIGX):
 		set_bit(HFSPLUS_SB_HFSX, &sbi->flags);
-		/*FALLTHRU*/
+		fallthrough;
 	case cpu_to_be16(HFSPLUS_VOLHEAD_SIG):
 		break;
 	case cpu_to_be16(HFSP_WRAP_MAGIC):
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 91e2cc8414f9a..8a53af8e5fe25 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2563,7 +2563,7 @@ static inline void io_rw_done(struct kiocb *kiocb, ssize_t ret)
 		 * IO with EINTR.
 		 */
 		ret = -EINTR;
-		/* fall through */
+		fallthrough;
 	default:
 		kiocb->ki_complete(kiocb, ret, 0);
 	}
diff --git a/fs/iomap/seek.c b/fs/iomap/seek.c
index 89f61d93c0bcf..107ee80c35683 100644
--- a/fs/iomap/seek.c
+++ b/fs/iomap/seek.c
@@ -127,7 +127,7 @@ iomap_seek_hole_actor(struct inode *inode, loff_t offset, loff_t length,
 						   SEEK_HOLE);
 		if (offset < 0)
 			return length;
-		/* fall through */
+		fallthrough;
 	case IOMAP_HOLE:
 		*(loff_t *)data = offset;
 		return 0;
@@ -175,7 +175,7 @@ iomap_seek_data_actor(struct inode *inode, loff_t offset, loff_t length,
 						   SEEK_DATA);
 		if (offset < 0)
 			return length;
-		/*FALLTHRU*/
+		fallthrough;
 	default:
 		*(loff_t *)data = offset;
 		return 0;
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index ab8cdd9e93259..78858f6e95839 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -341,7 +341,7 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
 			rdev = old_decode_dev(je16_to_cpu(jdev.old_id));
 		else
 			rdev = new_decode_dev(je32_to_cpu(jdev.new_id));
-		/* fall through */
+		fallthrough;
 
 	case S_IFSOCK:
 	case S_IFIFO:
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index bccfc40b3a74a..2f6f0b140c05a 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -1273,7 +1273,7 @@ static int jffs2_do_read_inode_internal(struct jffs2_sb_info *c,
 			dbg_readinode("symlink's target '%s' cached\n", f->target);
 		}
 
-		/* fall through... */
+		fallthrough;
 
 	case S_IFBLK:
 	case S_IFCHR:
diff --git a/fs/libfs.c b/fs/libfs.c
index 4d08edf19c782..e0d42e977d9af 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -137,11 +137,11 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int whence)
 	switch (whence) {
 		case 1:
 			offset += file->f_pos;
-			/* fall through */
+			fallthrough;
 		case 0:
 			if (offset >= 0)
 				break;
-			/* fall through */
+			fallthrough;
 		default:
 			return -EINVAL;
 	}
diff --git a/fs/locks.c b/fs/locks.c
index 8fc0542f51326..1f84a03601fec 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1499,7 +1499,7 @@ static void lease_clear_pending(struct file_lock *fl, int arg)
 	switch (arg) {
 	case F_UNLCK:
 		fl->fl_flags &= ~FL_UNLOCK_PENDING;
-		/* fall through */
+		fallthrough;
 	case F_RDLCK:
 		fl->fl_flags &= ~FL_DOWNGRADE_PENDING;
 	}
@@ -2525,7 +2525,7 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
 		cmd = F_SETLKW;
 		file_lock->fl_flags |= FL_OFDLCK;
 		file_lock->fl_owner = filp;
-		/* Fallthrough */
+		fallthrough;
 	case F_SETLKW:
 		file_lock->fl_flags |= FL_SLEEP;
 	}
@@ -2656,7 +2656,7 @@ int fcntl_setlk64(unsigned int fd, struct file *filp, unsigned int cmd,
 		cmd = F_SETLKW64;
 		file_lock->fl_flags |= FL_OFDLCK;
 		file_lock->fl_owner = filp;
-		/* Fallthrough */
+		fallthrough;
 	case F_SETLKW64:
 		file_lock->fl_flags |= FL_SLEEP;
 	}
diff --git a/fs/nfs/blocklayout/blocklayout.c b/fs/nfs/blocklayout/blocklayout.c
index d1a0e2c8b1b48..08108b6d2fa10 100644
--- a/fs/nfs/blocklayout/blocklayout.c
+++ b/fs/nfs/blocklayout/blocklayout.c
@@ -753,7 +753,7 @@ bl_alloc_lseg(struct pnfs_layout_hdr *lo, struct nfs4_layoutget_res *lgr,
 	case -ENODEV:
 		/* Our extent block devices are unavailable */
 		set_bit(NFS_LSEG_UNAVAILABLE, &lseg->pls_flags);
-		/* Fall through */
+		fallthrough;
 	case 0:
 		return lseg;
 	default:
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index a12f42e7d8c7c..e732580fe47b3 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1181,7 +1181,7 @@ int nfs_lookup_verify_inode(struct inode *inode, unsigned int flags)
 			/* A NFSv4 OPEN will revalidate later */
 			if (server->caps & NFS_CAP_ATOMIC_OPEN)
 				goto out;
-			/* Fallthrough */
+			fallthrough;
 		case S_IFDIR:
 			if (server->flags & NFS_MOUNT_NOCTO)
 				break;
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index a13e69009f196..7f5aa0403e167 100644
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -187,7 +187,7 @@ static int filelayout_async_handle_error(struct rpc_task *task,
 		pnfs_error_mark_layout_for_return(inode, lseg);
 		pnfs_set_lo_fail(lseg);
 		rpc_wake_up(&tbl->slot_tbl_waitq);
-		/* fall through */
+		fallthrough;
 	default:
 reset:
 		dprintk("%s Retry through MDS. Error %d\n", __func__,
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 965145592750a..ff8965d1a4d47 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1133,7 +1133,7 @@ static int ff_layout_async_handle_error_v4(struct rpc_task *task,
 		nfs4_delete_deviceid(devid->ld, devid->nfs_client,
 				&devid->deviceid);
 		rpc_wake_up(&tbl->slot_tbl_waitq);
-		/* fall through */
+		fallthrough;
 	default:
 		if (ff_layout_avoid_mds_available_ds(lseg))
 			return -NFS4ERR_RESET_TO_PNFS;
@@ -1260,7 +1260,7 @@ static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
 		 */
 		if (opnum == OP_READ)
 			break;
-		/* Fallthrough */
+		fallthrough;
 	default:
 		pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode,
 						  lseg);
diff --git a/fs/nfs/fs_context.c b/fs/nfs/fs_context.c
index 66949da0e8277..524812984e2d4 100644
--- a/fs/nfs/fs_context.c
+++ b/fs/nfs/fs_context.c
@@ -651,21 +651,21 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 		switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) {
 		case Opt_xprt_udp6:
 			protofamily = AF_INET6;
-			/* fall through */
+			fallthrough;
 		case Opt_xprt_udp:
 			ctx->flags &= ~NFS_MOUNT_TCP;
 			ctx->nfs_server.protocol = XPRT_TRANSPORT_UDP;
 			break;
 		case Opt_xprt_tcp6:
 			protofamily = AF_INET6;
-			/* fall through */
+			fallthrough;
 		case Opt_xprt_tcp:
 			ctx->flags |= NFS_MOUNT_TCP;
 			ctx->nfs_server.protocol = XPRT_TRANSPORT_TCP;
 			break;
 		case Opt_xprt_rdma6:
 			protofamily = AF_INET6;
-			/* fall through */
+			fallthrough;
 		case Opt_xprt_rdma:
 			/* vector side protocols to TCP */
 			ctx->flags |= NFS_MOUNT_TCP;
@@ -684,13 +684,13 @@ static int nfs_fs_context_parse_param(struct fs_context *fc,
 		switch (lookup_constant(nfs_xprt_protocol_tokens, param->string, -1)) {
 		case Opt_xprt_udp6:
 			mountfamily = AF_INET6;
-			/* fall through */
+			fallthrough;
 		case Opt_xprt_udp:
 			ctx->mount_server.protocol = XPRT_TRANSPORT_UDP;
 			break;
 		case Opt_xprt_tcp6:
 			mountfamily = AF_INET6;
-			/* fall through */
+			fallthrough;
 		case Opt_xprt_tcp:
 			ctx->mount_server.protocol = XPRT_TRANSPORT_TCP;
 			break;
@@ -899,9 +899,11 @@ static int nfs23_parse_monolithic(struct fs_context *fc,
 	ctx->version = NFS_DEFAULT_VERSION;
 	switch (data->version) {
 	case 1:
-		data->namlen = 0; /* fall through */
+		data->namlen = 0;
+		fallthrough;
 	case 2:
-		data->bsize = 0; /* fall through */
+		data->bsize = 0;
+		fallthrough;
 	case 3:
 		if (data->flags & NFS_MOUNT_VER3)
 			goto out_no_v3;
@@ -909,14 +911,14 @@ static int nfs23_parse_monolithic(struct fs_context *fc,
 		memcpy(data->root.data, data->old_root.data, NFS2_FHSIZE);
 		/* Turn off security negotiation */
 		extra_flags |= NFS_MOUNT_SECFLAVOUR;
-		/* fall through */
+		fallthrough;
 	case 4:
 		if (data->flags & NFS_MOUNT_SECFLAVOUR)
 			goto out_no_sec;
-		/* fall through */
+		fallthrough;
 	case 5:
 		memset(data->context, 0, sizeof(data->context));
-		/* fall through */
+		fallthrough;
 	case 6:
 		if (data->flags & NFS_MOUNT_VER3) {
 			if (data->root.size > NFS3_FHSIZE || data->root.size == 0)
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 26c94b32d6f49..c6c863382f375 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -108,7 +108,7 @@ struct posix_acl *nfs3_get_acl(struct inode *inode, int type)
 		case -EPROTONOSUPPORT:
 			dprintk("NFS_V3_ACL extension not supported; disabling\n");
 			server->caps &= ~NFS_CAP_ACLS;
-			/* fall through */
+			fallthrough;
 		case -ENOTSUPP:
 			status = -EOPNOTSUPP;
 		default:
@@ -228,7 +228,7 @@ static int __nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
 			dprintk("NFS_V3_ACL SETACL RPC not supported"
 					"(will not retry)\n");
 			server->caps &= ~NFS_CAP_ACLS;
-			/* fall through */
+			fallthrough;
 		case -ENOTSUPP:
 			status = -EOPNOTSUPP;
 	}
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index a339707654673..fdfc77486acee 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -211,7 +211,7 @@ static loff_t nfs4_file_llseek(struct file *filep, loff_t offset, int whence)
 		ret = nfs42_proc_llseek(filep, offset, whence);
 		if (ret != -ENOTSUPP)
 			return ret;
-		/* Fall through */
+		fallthrough;
 	default:
 		return nfs_file_llseek(filep, offset, whence);
 	}
diff --git a/fs/nfs/nfs4idmap.c b/fs/nfs/nfs4idmap.c
index 1e7296395d71b..62e6eea5c516d 100644
--- a/fs/nfs/nfs4idmap.c
+++ b/fs/nfs/nfs4idmap.c
@@ -520,7 +520,7 @@ static int nfs_idmap_prepare_message(char *desc, struct idmap *idmap,
 	switch (token) {
 	case Opt_find_uid:
 		im->im_type = IDMAP_TYPE_USER;
-		/* Fall through */
+		fallthrough;
 	case Opt_find_gid:
 		im->im_conv = IDMAP_CONV_NAMETOID;
 		ret = match_strlcpy(im->im_name, &substr, IDMAP_NAMESZ);
@@ -528,7 +528,7 @@ static int nfs_idmap_prepare_message(char *desc, struct idmap *idmap,
 
 	case Opt_find_user:
 		im->im_type = IDMAP_TYPE_USER;
-		/* Fall through */
+		fallthrough;
 	case Opt_find_group:
 		im->im_conv = IDMAP_CONV_IDTONAME;
 		ret = match_int(&substr, &im->im_id);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index dbd01548335b2..f8946b9468ef0 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -483,7 +483,7 @@ static int nfs4_do_handle_exception(struct nfs_server *server,
 						stateid);
 				goto wait_on_recovery;
 			}
-			/* Fall through */
+			fallthrough;
 		case -NFS4ERR_OPENMODE:
 			if (inode) {
 				int err;
@@ -534,10 +534,10 @@ static int nfs4_do_handle_exception(struct nfs_server *server,
 				ret = -EBUSY;
 				break;
 			}
-			/* Fall through */
+			fallthrough;
 		case -NFS4ERR_DELAY:
 			nfs_inc_server_stats(server, NFSIOS_DELAY);
-			/* Fall through */
+			fallthrough;
 		case -NFS4ERR_GRACE:
 		case -NFS4ERR_LAYOUTTRYLATER:
 		case -NFS4ERR_RECALLCONFLICT:
@@ -1505,7 +1505,7 @@ static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
 	case NFS4_OPEN_CLAIM_PREVIOUS:
 		if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
 			break;
-		/* Fall through */
+		fallthrough;
 	default:
 		return 0;
 	}
@@ -2439,7 +2439,7 @@ static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
 	case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 	case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 		data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
-		/* Fall through */
+		fallthrough;
 	case NFS4_OPEN_CLAIM_FH:
 		task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
 	}
@@ -3545,11 +3545,11 @@ static void nfs4_close_done(struct rpc_task *task, void *data)
 			nfs4_free_revoked_stateid(server,
 					&calldata->arg.stateid,
 					task->tk_msg.rpc_cred);
-			/* Fallthrough */
+			fallthrough;
 		case -NFS4ERR_BAD_STATEID:
 			if (calldata->arg.fmode == 0)
 				break;
-			/* Fallthrough */
+			fallthrough;
 		default:
 			task->tk_status = nfs4_async_handle_exception(task,
 					server, task->tk_status, &exception);
@@ -6294,7 +6294,7 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
 		nfs4_free_revoked_stateid(data->res.server,
 				data->args.stateid,
 				task->tk_msg.rpc_cred);
-		/* Fallthrough */
+		fallthrough;
 	case -NFS4ERR_BAD_STATEID:
 	case -NFS4ERR_STALE_STATEID:
 	case -ETIMEDOUT:
@@ -6314,7 +6314,7 @@ static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
 			data->res.fattr = NULL;
 			goto out_restart;
 		}
-		/* Fallthrough */
+		fallthrough;
 	default:
 		task->tk_status = nfs4_async_handle_exception(task,
 				data->res.server, task->tk_status,
@@ -6622,13 +6622,13 @@ static void nfs4_locku_done(struct rpc_task *task, void *data)
 			if (nfs4_update_lock_stateid(calldata->lsp,
 					&calldata->res.stateid))
 				break;
-			/* Fall through */
+			fallthrough;
 		case -NFS4ERR_ADMIN_REVOKED:
 		case -NFS4ERR_EXPIRED:
 			nfs4_free_revoked_stateid(calldata->server,
 					&calldata->arg.stateid,
 					task->tk_msg.rpc_cred);
-			/* Fall through */
+			fallthrough;
 		case -NFS4ERR_BAD_STATEID:
 		case -NFS4ERR_STALE_STATEID:
 			if (nfs4_sync_lock_stateid(&calldata->arg.stateid,
@@ -8665,7 +8665,7 @@ static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
 		dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
 		rpc_delay(task, NFS4_POLL_RETRY_MIN);
 		task->tk_status = 0;
-		/* fall through */
+		fallthrough;
 	case -NFS4ERR_RETRY_UNCACHED_REP:
 		rpc_restart_call_prepare(task);
 		return;
@@ -9113,13 +9113,13 @@ static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nf
 	switch(task->tk_status) {
 	case 0:
 		wake_up_all(&clp->cl_lock_waitq);
-		/* Fallthrough */
+		fallthrough;
 	case -NFS4ERR_COMPLETE_ALREADY:
 	case -NFS4ERR_WRONG_CRED: /* What to do here? */
 		break;
 	case -NFS4ERR_DELAY:
 		rpc_delay(task, NFS4_POLL_RETRY_MAX);
-		/* fall through */
+		fallthrough;
 	case -NFS4ERR_RETRY_UNCACHED_REP:
 		return -EAGAIN;
 	case -NFS4ERR_BADSESSION:
@@ -9434,10 +9434,10 @@ static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
 					&lrp->args.range,
 					lrp->args.inode))
 			goto out_restart;
-		/* Fallthrough */
+		fallthrough;
 	default:
 		task->tk_status = 0;
-		/* Fallthrough */
+		fallthrough;
 	case 0:
 		break;
 	case -NFS4ERR_DELAY:
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index b1dba24918f80..4bf10792cb5b1 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -1530,7 +1530,7 @@ static int nfs4_reclaim_locks(struct nfs4_state *state, const struct nfs4_state_
 		default:
 			pr_err("NFS: %s: unhandled error %d\n",
 					__func__, status);
-			/* Fall through */
+			fallthrough;
 		case -ENOMEM:
 		case -NFS4ERR_DENIED:
 		case -NFS4ERR_RECLAIM_BAD:
@@ -1667,7 +1667,7 @@ static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs
 				break;
 			}
 			printk(KERN_ERR "NFS: %s: unhandled error %d\n", __func__, status);
-			/* Fall through */
+			fallthrough;
 		case -ENOENT:
 		case -ENOMEM:
 		case -EACCES:
@@ -1683,7 +1683,7 @@ static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs
 				set_bit(ops->state_flag_bit, &state->flags);
 				break;
 			}
-			/* Fall through */
+			fallthrough;
 		case -NFS4ERR_ADMIN_REVOKED:
 		case -NFS4ERR_STALE_STATEID:
 		case -NFS4ERR_OLD_STATEID:
@@ -1695,7 +1695,7 @@ static int nfs4_reclaim_open_state(struct nfs4_state_owner *sp, const struct nfs
 		case -NFS4ERR_EXPIRED:
 		case -NFS4ERR_NO_GRACE:
 			nfs4_state_mark_reclaim_nograce(sp->so_server->nfs_client, state);
-			/* Fall through */
+			fallthrough;
 		case -NFS4ERR_STALE_CLIENTID:
 		case -NFS4ERR_BADSESSION:
 		case -NFS4ERR_BADSLOT:
@@ -2273,11 +2273,11 @@ int nfs4_discover_server_trunking(struct nfs_client *clp,
 	case -ETIMEDOUT:
 		if (clnt->cl_softrtry)
 			break;
-		/* Fall through */
+		fallthrough;
 	case -NFS4ERR_DELAY:
 	case -EAGAIN:
 		ssleep(1);
-		/* Fall through */
+		fallthrough;
 	case -NFS4ERR_STALE_CLIENTID:
 		dprintk("NFS: %s after status %d, retrying\n",
 			__func__, status);
@@ -2289,7 +2289,7 @@ int nfs4_discover_server_trunking(struct nfs_client *clp,
 		}
 		if (clnt->cl_auth->au_flavor == RPC_AUTH_UNIX)
 			break;
-		/* Fall through */
+		fallthrough;
 	case -NFS4ERR_CLID_INUSE:
 	case -NFS4ERR_WRONGSEC:
 		/* No point in retrying if we already used RPC_AUTH_UNIX */
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index 6ea4cac41e46f..6985cacf4700d 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -711,7 +711,7 @@ static void nfs_pgio_rpcsetup(struct nfs_pgio_header *hdr,
 	case FLUSH_COND_STABLE:
 		if (nfs_reqs_to_commit(cinfo))
 			break;
-		/* fall through */
+		fallthrough;
 	default:
 		hdr->args.stable = NFS_FILE_SYNC;
 	}
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 40332c758d846..71f7741126b6d 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -1541,7 +1541,7 @@ void pnfs_roc_release(struct nfs4_layoutreturn_args *args,
 	case 0:
 		if (res->lrs_present)
 			res_stateid = &res->stateid;
-		/* Fallthrough */
+		fallthrough;
 	default:
 		arg_stateid = &args->stateid;
 	}
diff --git a/fs/nfs_common/nfsacl.c b/fs/nfs_common/nfsacl.c
index 8ceb6425e01aa..d056ad2fdefd6 100644
--- a/fs/nfs_common/nfsacl.c
+++ b/fs/nfs_common/nfsacl.c
@@ -237,7 +237,7 @@ posix_acl_from_nfsacl(struct posix_acl *acl)
 				break;
 			case ACL_MASK:
 				mask = pa;
-				/* fall through */
+				fallthrough;
 			case ACL_OTHER:
 				break;
 		}
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index 9bbaa671c0799..311e5ce80cfc2 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -83,13 +83,13 @@ nfsd4_block_proc_layoutget(struct inode *inode, const struct svc_fh *fhp,
 			bex->soff = iomap.addr;
 			break;
 		}
-		/*FALLTHRU*/
+		fallthrough;
 	case IOMAP_HOLE:
 		if (seg->iomode == IOMODE_READ) {
 			bex->es = PNFS_BLOCK_NONE_DATA;
 			break;
 		}
-		/*FALLTHRU*/
+		fallthrough;
 	case IOMAP_DELALLOC:
 	default:
 		WARN(1, "pnfsd: filesystem returned %d extent\n", iomap.type);
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 7fbe9840a03e7..052be5bf9ef50 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -1119,7 +1119,7 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback
 		break;
 	case -ESERVERFAULT:
 		++session->se_cb_seq_nr;
-		/* Fall through */
+		fallthrough;
 	case 1:
 	case -NFS4ERR_BADSESSION:
 		nfsd4_mark_cb_fault(cb->cb_clp, cb->cb_seq_status);
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index e12409eca7cc4..a97873f2d22b0 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -681,7 +681,7 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task)
 			rpc_delay(task, HZ/100); /* 10 mili-seconds */
 			return 0;
 		}
-		/* Fallthrough */
+		fallthrough;
 	default:
 		/*
 		 * Unknown error or non-responding client, we'll need to fence.
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index a527da3d80521..eaf50eafa9359 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -428,7 +428,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 				goto out;
 			open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 			reclaim = true;
-			/* fall through */
+			fallthrough;
 		case NFS4_OPEN_CLAIM_FH:
 		case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 			status = do_open_fhandle(rqstp, cstate, open);
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 81ed8e8bab3fc..49a604b1c6a60 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3117,7 +3117,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		break;
 	default:				/* checked by xdr code */
 		WARN_ON_ONCE(1);
-		/* fall through */
+		fallthrough;
 	case SP4_SSV:
 		status = nfserr_encr_alg_unsupp;
 		goto out_nolock;
@@ -4532,7 +4532,7 @@ static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
 			rpc_delay(task, 2 * HZ);
 			return 0;
 		}
-		/*FALLTHRU*/
+		fallthrough;
 	default:
 		return 1;
 	}
@@ -5652,7 +5652,7 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
 		break;
 	default:
 		printk("unknown stateid type %x\n", s->sc_type);
-		/* Fallthrough */
+		fallthrough;
 	case NFS4_CLOSED_STID:
 	case NFS4_CLOSED_DELEG_STID:
 		status = nfserr_bad_stateid;
@@ -6742,7 +6742,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		case NFS4_READW_LT:
 			if (nfsd4_has_session(cstate))
 				fl_flags |= FL_SLEEP;
-			/* Fallthrough */
+			fallthrough;
 		case NFS4_READ_LT:
 			spin_lock(&fp->fi_lock);
 			nf = find_readable_file_locked(fp);
@@ -6754,7 +6754,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		case NFS4_WRITEW_LT:
 			if (nfsd4_has_session(cstate))
 				fl_flags |= FL_SLEEP;
-			/* Fallthrough */
+			fallthrough;
 		case NFS4_WRITE_LT:
 			spin_lock(&fp->fi_lock);
 			nf = find_writeable_file_locked(fp);
@@ -6816,7 +6816,7 @@ nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		break;
 	case FILE_LOCK_DEFERRED:
 		nbl = NULL;
-		/* Fallthrough */
+		fallthrough;
 	case -EAGAIN:		/* conflock holds conflicting lock */
 		status = nfserr_denied;
 		dprintk("NFSD: nfsd4_lock: conflicting lock found!\n");
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 37bc8f5f45142..c81dbbad87920 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -459,7 +459,7 @@ static bool fsid_type_ok_for_exp(u8 fsid_type, struct svc_export *exp)
 	case FSID_DEV:
 		if (!old_valid_dev(exp_sb(exp)->s_dev))
 			return false;
-		/* FALL THROUGH */
+		fallthrough;
 	case FSID_MAJOR_MINOR:
 	case FSID_ENCODE_DEV:
 		return exp_sb(exp)->s_type->fs_flags & FS_REQUIRES_DEV;
@@ -469,7 +469,7 @@ static bool fsid_type_ok_for_exp(u8 fsid_type, struct svc_export *exp)
 	case FSID_UUID16:
 		if (!is_root_export(exp))
 			return false;
-		/* fall through */
+		fallthrough;
 	case FSID_UUID4_INUM:
 	case FSID_UUID16_INUM:
 		return exp->ex_uuid != NULL;
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 543bbe0a556e7..6e0b066480c50 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -314,7 +314,7 @@ nfsd_proc_create(struct svc_rqst *rqstp)
 					rdev = inode->i_rdev;
 					attr->ia_valid |= ATTR_SIZE;
 
-					/* FALLTHROUGH */
+					fallthrough;
 				case S_IFIFO:
 					/* this is probably a permission check..
 					 * at least IRIX implements perm checking on
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index b603dfcdd3615..f7f6473578afa 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -221,7 +221,7 @@ int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change)
 	case NFSD_TEST:
 		if (nn->nfsd_versions)
 			return nn->nfsd_versions[vers];
-		/* Fallthrough */
+		fallthrough;
 	case NFSD_AVAIL:
 		return nfsd_support_version(vers);
 	}
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 7d2933b85b653..aba5af9df328a 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1456,7 +1456,7 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
 					*created = true;
 				break;
 			}
-			/* fall through */
+			fallthrough;
 		case NFS4_CREATE_EXCLUSIVE4_1:
 			if (   d_inode(dchild)->i_mtime.tv_sec == v_mtime
 			    && d_inode(dchild)->i_atime.tv_sec == v_atime
@@ -1465,7 +1465,7 @@ do_nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
 					*created = true;
 				goto set_attr;
 			}
-			/* fall through */
+			fallthrough;
 		case NFS3_CREATE_GUARDED:
 			err = nfserr_exist;
 		}
diff --git a/fs/nilfs2/bmap.c b/fs/nilfs2/bmap.c
index fb5a9a8a13cf7..e516ae389ca5b 100644
--- a/fs/nilfs2/bmap.c
+++ b/fs/nilfs2/bmap.c
@@ -519,7 +519,7 @@ int nilfs_bmap_read(struct nilfs_bmap *bmap, struct nilfs_inode *raw_inode)
 		break;
 	case NILFS_IFILE_INO:
 		lockdep_set_class(&bmap->b_sem, &nilfs_bmap_mdt_lock_key);
-		/* Fall through */
+		fallthrough;
 	default:
 		bmap->b_ptr_type = NILFS_BMAP_PTR_VM;
 		bmap->b_last_allocated_key = 0;
diff --git a/fs/nilfs2/recovery.c b/fs/nilfs2/recovery.c
index 0b453ef8fae5c..2217f904a7cfb 100644
--- a/fs/nilfs2/recovery.c
+++ b/fs/nilfs2/recovery.c
@@ -626,7 +626,7 @@ static int nilfs_do_roll_forward(struct the_nilfs *nilfs,
 			    !(flags & NILFS_SS_SYNDT))
 				goto try_next_pseg;
 			state = RF_DSYNC_ST;
-			/* Fall through */
+			fallthrough;
 		case RF_DSYNC_ST:
 			if (!(flags & NILFS_SS_SYNDT))
 				goto confused;
diff --git a/fs/nilfs2/segment.c b/fs/nilfs2/segment.c
index a651e821c2de3..e3726aca28ed6 100644
--- a/fs/nilfs2/segment.c
+++ b/fs/nilfs2/segment.c
@@ -1138,7 +1138,8 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode)
 			nilfs_sc_cstage_set(sci, NILFS_ST_DAT);
 			goto dat_stage;
 		}
-		nilfs_sc_cstage_inc(sci);  /* Fall through */
+		nilfs_sc_cstage_inc(sci);
+		fallthrough;
 	case NILFS_ST_GC:
 		if (nilfs_doing_gc()) {
 			head = &sci->sc_gc_inodes;
@@ -1159,7 +1160,8 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode)
 			}
 			sci->sc_stage.gc_inode_ptr = NULL;
 		}
-		nilfs_sc_cstage_inc(sci);  /* Fall through */
+		nilfs_sc_cstage_inc(sci);
+		fallthrough;
 	case NILFS_ST_FILE:
 		head = &sci->sc_dirty_files;
 		ii = list_prepare_entry(sci->sc_stage.dirty_file_ptr, head,
@@ -1186,7 +1188,7 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode)
 		}
 		nilfs_sc_cstage_inc(sci);
 		sci->sc_stage.flags |= NILFS_CF_IFILE_STARTED;
-		/* Fall through */
+		fallthrough;
 	case NILFS_ST_IFILE:
 		err = nilfs_segctor_scan_file(sci, sci->sc_root->ifile,
 					      &nilfs_sc_file_ops);
@@ -1197,13 +1199,14 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode)
 		err = nilfs_segctor_create_checkpoint(sci);
 		if (unlikely(err))
 			break;
-		/* Fall through */
+		fallthrough;
 	case NILFS_ST_CPFILE:
 		err = nilfs_segctor_scan_file(sci, nilfs->ns_cpfile,
 					      &nilfs_sc_file_ops);
 		if (unlikely(err))
 			break;
-		nilfs_sc_cstage_inc(sci);  /* Fall through */
+		nilfs_sc_cstage_inc(sci);
+		fallthrough;
 	case NILFS_ST_SUFILE:
 		err = nilfs_sufile_freev(nilfs->ns_sufile, sci->sc_freesegs,
 					 sci->sc_nfreesegs, &ndone);
@@ -1219,7 +1222,8 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode)
 					      &nilfs_sc_file_ops);
 		if (unlikely(err))
 			break;
-		nilfs_sc_cstage_inc(sci);  /* Fall through */
+		nilfs_sc_cstage_inc(sci);
+		fallthrough;
 	case NILFS_ST_DAT:
  dat_stage:
 		err = nilfs_segctor_scan_file(sci, nilfs->ns_dat,
@@ -1230,7 +1234,8 @@ static int nilfs_segctor_collect_blocks(struct nilfs_sc_info *sci, int mode)
 			nilfs_sc_cstage_set(sci, NILFS_ST_DONE);
 			return 0;
 		}
-		nilfs_sc_cstage_inc(sci);  /* Fall through */
+		nilfs_sc_cstage_inc(sci);
+		fallthrough;
 	case NILFS_ST_SR:
 		if (mode == SC_LSEG_SR) {
 			/* Appending a super root */
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 559de311deca9..3e01d8f2ab906 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -1147,7 +1147,7 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
 	}
 
 	switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE | FAN_MARK_FLUSH)) {
-	case FAN_MARK_ADD:		/* fallthrough */
+	case FAN_MARK_ADD:
 	case FAN_MARK_REMOVE:
 		if (!mask)
 			return -EINVAL;
diff --git a/fs/ocfs2/cluster/quorum.c b/fs/ocfs2/cluster/quorum.c
index 1ef24574f4818..cea739be77c46 100644
--- a/fs/ocfs2/cluster/quorum.c
+++ b/fs/ocfs2/cluster/quorum.c
@@ -67,7 +67,7 @@ static void o2quo_fence_self(void)
 	default:
 		WARN_ON(o2nm_single_cluster->cl_fence_method >=
 			O2NM_FENCE_METHODS);
-		/* fall through */
+		fallthrough;
 	case O2NM_FENCE_RESET:
 		printk(KERN_ERR "*** ocfs2 is very sorry to be fencing this "
 		       "system by restarting ***\n");
diff --git a/fs/pstore/zone.c b/fs/pstore/zone.c
index 819428dfa32fa..3ce89216670c9 100644
--- a/fs/pstore/zone.c
+++ b/fs/pstore/zone.c
@@ -1081,7 +1081,6 @@ static ssize_t psz_pstore_read(struct pstore_record *record)
 		readop = psz_ftrace_read;
 		break;
 	case PSTORE_TYPE_CONSOLE:
-		fallthrough;
 	case PSTORE_TYPE_PMSG:
 		readop = psz_record_read;
 		break;
diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index 5444d3c4d93f3..47f9e151988b3 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -38,7 +38,7 @@ static int check_quotactl_permission(struct super_block *sb, int type, int cmd,
 		if ((type == USRQUOTA && uid_eq(current_euid(), make_kuid(current_user_ns(), id))) ||
 		    (type == GRPQUOTA && in_egroup_p(make_kgid(current_user_ns(), id))))
 			break;
-		/*FALLTHROUGH*/
+		fallthrough;
 	default:
 		if (!capable(CAP_SYS_ADMIN))
 			return -EPERM;
diff --git a/fs/seq_file.c b/fs/seq_file.c
index 4e6239f33c066..31219c1db17de 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -295,7 +295,7 @@ loff_t seq_lseek(struct file *file, loff_t offset, int whence)
 	switch (whence) {
 	case SEEK_CUR:
 		offset += file->f_pos;
-		/* fall through */
+		fallthrough;
 	case SEEK_SET:
 		if (offset < 0)
 			break;
diff --git a/fs/signalfd.c b/fs/signalfd.c
index 5b78719be4455..456046e158737 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -176,7 +176,7 @@ static ssize_t signalfd_dequeue(struct signalfd_ctx *ctx, kernel_siginfo_t *info
 		if (!nonblock)
 			break;
 		ret = -EAGAIN;
-		/* fall through */
+		fallthrough;
 	default:
 		spin_unlock_irq(&current->sighand->siglock);
 		return ret;
diff --git a/fs/ubifs/lprops.c b/fs/ubifs/lprops.c
index 22bfda158f7fd..6d6cd85c2b4ca 100644
--- a/fs/ubifs/lprops.c
+++ b/fs/ubifs/lprops.c
@@ -269,7 +269,7 @@ void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops,
 			break;
 		/* No more room on heap so make it un-categorized */
 		cat = LPROPS_UNCAT;
-		/* Fall through */
+		fallthrough;
 	case LPROPS_UNCAT:
 		list_add(&lprops->list, &c->uncat_list);
 		break;
@@ -313,7 +313,7 @@ static void ubifs_remove_from_cat(struct ubifs_info *c,
 	case LPROPS_FREEABLE:
 		c->freeable_cnt -= 1;
 		ubifs_assert(c, c->freeable_cnt >= 0);
-		/* Fall through */
+		fallthrough;
 	case LPROPS_UNCAT:
 	case LPROPS_EMPTY:
 	case LPROPS_FRDI_IDX:
diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c
index 6023c97c6da2f..25ff91c7e94af 100644
--- a/fs/udf/symlink.c
+++ b/fs/udf/symlink.c
@@ -52,7 +52,7 @@ static int udf_pc_to_char(struct super_block *sb, unsigned char *from,
 				elen += pc->lengthComponentIdent;
 				break;
 			}
-			/* Fall through */
+			fallthrough;
 		case 2:
 			if (tolen == 0)
 				return -ENAMETOOLONG;
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index e1f1b2e868a7d..4931bec1a01ca 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -42,7 +42,7 @@ ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
 	case UFS_ST_SUNOS:
 		if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
 			return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
-		/* Fall Through - to UFS_ST_SUN */
+		fallthrough;	/* to UFS_ST_SUN */
 	case UFS_ST_SUN:
 		return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
 	case UFS_ST_SUNx86:
@@ -63,7 +63,7 @@ ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
 			usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
 			break;
 		}
-		/* Fall Through - to UFS_ST_SUN */
+		fallthrough;	/* to UFS_ST_SUN */
 	case UFS_ST_SUN:
 		usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
 		break;
@@ -197,7 +197,7 @@ ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
 	case UFS_UID_EFT:
 		if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
 			return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
-		/* Fall through */
+		fallthrough;
 	default:
 		return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
 	}
@@ -215,7 +215,7 @@ ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 		inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
 		if (value > 0xFFFF)
 			value = 0xFFFF;
-		/* Fall through */
+		fallthrough;
 	default:
 		inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
 		break;
@@ -231,7 +231,7 @@ ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
 	case UFS_UID_EFT:
 		if (inode->ui_u1.oldids.ui_sgid == 0xFFFF)
 			return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
-		/* Fall through */
+		fallthrough;
 	default:
 		return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
 	}
@@ -249,7 +249,7 @@ ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
 		inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
 		if (value > 0xFFFF)
 			value = 0xFFFF;
-		/* Fall through */
+		fallthrough;
 	default:
 		inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
 		break;
diff --git a/fs/vboxsf/utils.c b/fs/vboxsf/utils.c
index 96bd160da48ba..0180575460671 100644
--- a/fs/vboxsf/utils.c
+++ b/fs/vboxsf/utils.c
@@ -226,7 +226,7 @@ int vboxsf_getattr(const struct path *path, struct kstat *kstat,
 		break;
 	case AT_STATX_FORCE_SYNC:
 		sf_i->force_restat = 1;
-		/* fall-through */
+		fallthrough;
 	default:
 		err = vboxsf_inode_revalidate(dentry);
 	}
diff --git a/include/linux/compat.h b/include/linux/compat.h
index d38c4d7e83bd3..b354ce58966e2 100644
--- a/include/linux/compat.h
+++ b/include/linux/compat.h
@@ -429,11 +429,11 @@ put_compat_sigset(compat_sigset_t __user *compat, const sigset_t *set,
 	compat_sigset_t v;
 	switch (_NSIG_WORDS) {
 	case 4: v.sig[7] = (set->sig[3] >> 32); v.sig[6] = set->sig[3];
-		/* fall through */
+		fallthrough;
 	case 3: v.sig[5] = (set->sig[2] >> 32); v.sig[4] = set->sig[2];
-		/* fall through */
+		fallthrough;
 	case 2: v.sig[3] = (set->sig[1] >> 32); v.sig[2] = set->sig[1];
-		/* fall through */
+		fallthrough;
 	case 1: v.sig[1] = (set->sig[0] >> 32); v.sig[0] = set->sig[0];
 	}
 	return copy_to_user(compat, &v, size) ? -EFAULT : 0;
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 0a355b005bf45..ebfb7cfb65f10 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -1200,7 +1200,7 @@ static inline u16 bpf_anc_helper(const struct sock_filter *ftest)
 		BPF_ANCILLARY(RANDOM);
 		BPF_ANCILLARY(VLAN_TPID);
 		}
-		/* Fallthrough. */
+		fallthrough;
 	default:
 		return ftest->code;
 	}
diff --git a/include/linux/jhash.h b/include/linux/jhash.h
index 19ddd43aee689..cfb62e9f37be0 100644
--- a/include/linux/jhash.h
+++ b/include/linux/jhash.h
@@ -86,17 +86,17 @@ static inline u32 jhash(const void *key, u32 length, u32 initval)
 	}
 	/* Last block: affect all 32 bits of (c) */
 	switch (length) {
-	case 12: c += (u32)k[11]<<24;	/* fall through */
-	case 11: c += (u32)k[10]<<16;	/* fall through */
-	case 10: c += (u32)k[9]<<8;	/* fall through */
-	case 9:  c += k[8];		/* fall through */
-	case 8:  b += (u32)k[7]<<24;	/* fall through */
-	case 7:  b += (u32)k[6]<<16;	/* fall through */
-	case 6:  b += (u32)k[5]<<8;	/* fall through */
-	case 5:  b += k[4];		/* fall through */
-	case 4:  a += (u32)k[3]<<24;	/* fall through */
-	case 3:  a += (u32)k[2]<<16;	/* fall through */
-	case 2:  a += (u32)k[1]<<8;	/* fall through */
+	case 12: c += (u32)k[11]<<24;	fallthrough;
+	case 11: c += (u32)k[10]<<16;	fallthrough;
+	case 10: c += (u32)k[9]<<8;	fallthrough;
+	case 9:  c += k[8];		fallthrough;
+	case 8:  b += (u32)k[7]<<24;	fallthrough;
+	case 7:  b += (u32)k[6]<<16;	fallthrough;
+	case 6:  b += (u32)k[5]<<8;	fallthrough;
+	case 5:  b += k[4];		fallthrough;
+	case 4:  a += (u32)k[3]<<24;	fallthrough;
+	case 3:  a += (u32)k[2]<<16;	fallthrough;
+	case 2:  a += (u32)k[1]<<8;	fallthrough;
 	case 1:  a += k[0];
 		 __jhash_final(a, b, c);
 	case 0: /* Nothing left to add */
@@ -132,8 +132,8 @@ static inline u32 jhash2(const u32 *k, u32 length, u32 initval)
 
 	/* Handle the last 3 u32's */
 	switch (length) {
-	case 3: c += k[2];	/* fall through */
-	case 2: b += k[1];	/* fall through */
+	case 3: c += k[2];	fallthrough;
+	case 2: b += k[1];	fallthrough;
 	case 1: a += k[0];
 		__jhash_final(a, b, c);
 	case 0:	/* Nothing left to add */
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1983e08f59062..97c83773b6f06 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -157,11 +157,14 @@ static inline void __mm_zero_struct_page(struct page *page)
 
 	switch (sizeof(struct page)) {
 	case 80:
-		_pp[9] = 0;	/* fallthrough */
+		_pp[9] = 0;
+		fallthrough;
 	case 72:
-		_pp[8] = 0;	/* fallthrough */
+		_pp[8] = 0;
+		fallthrough;
 	case 64:
-		_pp[7] = 0;	/* fallthrough */
+		_pp[7] = 0;
+		fallthrough;
 	case 56:
 		_pp[6] = 0;
 		_pp[5] = 0;
diff --git a/include/linux/signal.h b/include/linux/signal.h
index 6bb1a3f0258c2..7bbc0e9cf0847 100644
--- a/include/linux/signal.h
+++ b/include/linux/signal.h
@@ -137,11 +137,11 @@ static inline void name(sigset_t *r, const sigset_t *a, const sigset_t *b) \
 		b3 = b->sig[3]; b2 = b->sig[2];				\
 		r->sig[3] = op(a3, b3);					\
 		r->sig[2] = op(a2, b2);					\
-		/* fall through */					\
+		fallthrough;						\
 	case 2:								\
 		a1 = a->sig[1]; b1 = b->sig[1];				\
 		r->sig[1] = op(a1, b1);					\
-		/* fall through */					\
+		fallthrough;						\
 	case 1:								\
 		a0 = a->sig[0]; b0 = b->sig[0];				\
 		r->sig[0] = op(a0, b0);					\
@@ -171,9 +171,9 @@ static inline void name(sigset_t *set)					\
 	switch (_NSIG_WORDS) {						\
 	case 4:	set->sig[3] = op(set->sig[3]);				\
 		set->sig[2] = op(set->sig[2]);				\
-		/* fall through */					\
+		fallthrough;						\
 	case 2:	set->sig[1] = op(set->sig[1]);				\
-		/* fall through */					\
+		fallthrough;						\
 	case 1:	set->sig[0] = op(set->sig[0]);				\
 		    break;						\
 	default:							\
@@ -194,7 +194,7 @@ static inline void sigemptyset(sigset_t *set)
 		memset(set, 0, sizeof(sigset_t));
 		break;
 	case 2: set->sig[1] = 0;
-		/* fall through */
+		fallthrough;
 	case 1:	set->sig[0] = 0;
 		break;
 	}
@@ -207,7 +207,7 @@ static inline void sigfillset(sigset_t *set)
 		memset(set, -1, sizeof(sigset_t));
 		break;
 	case 2: set->sig[1] = -1;
-		/* fall through */
+		fallthrough;
 	case 1:	set->sig[0] = -1;
 		break;
 	}
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 46881d9021241..ab57cf787c1f5 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -3745,19 +3745,19 @@ static inline bool __skb_metadata_differs(const struct sk_buff *skb_a,
 #define __it(x, op) (x -= sizeof(u##op))
 #define __it_diff(a, b, op) (*(u##op *)__it(a, op)) ^ (*(u##op *)__it(b, op))
 	case 32: diffs |= __it_diff(a, b, 64);
-		 /* fall through */
+		fallthrough;
 	case 24: diffs |= __it_diff(a, b, 64);
-		 /* fall through */
+		fallthrough;
 	case 16: diffs |= __it_diff(a, b, 64);
-		 /* fall through */
+		fallthrough;
 	case  8: diffs |= __it_diff(a, b, 64);
 		break;
 	case 28: diffs |= __it_diff(a, b, 64);
-		 /* fall through */
+		fallthrough;
 	case 20: diffs |= __it_diff(a, b, 64);
-		 /* fall through */
+		fallthrough;
 	case 12: diffs |= __it_diff(a, b, 64);
-		 /* fall through */
+		fallthrough;
 	case  4: diffs |= __it_diff(a, b, 32);
 		break;
 	}
diff --git a/include/math-emu/op-common.h b/include/math-emu/op-common.h
index adcc6a97db612..143568d64b207 100644
--- a/include/math-emu/op-common.h
+++ b/include/math-emu/op-common.h
@@ -308,7 +308,7 @@ do {									     \
 									     \
   case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZERO):			     \
     R##_e = X##_e;							     \
-	  /* Fall through */						     \
+	fallthrough;							     \
   case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_NORMAL):			     \
   case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_INF):				     \
   case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_ZERO):				     \
@@ -319,7 +319,7 @@ do {									     \
 									     \
   case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NORMAL):			     \
     R##_e = Y##_e;							     \
-	  /* Fall through */						     \
+	fallthrough;							     \
   case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_NAN):			     \
   case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NAN):				     \
   case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NAN):				     \
@@ -417,7 +417,7 @@ do {							\
   case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_INF):		\
   case _FP_CLS_COMBINE(FP_CLS_NAN,FP_CLS_ZERO):		\
     R##_s = X##_s;					\
-	/* Fall through */				\
+	  fallthrough;					\
 							\
   case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_INF):		\
   case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NORMAL):	\
@@ -431,7 +431,7 @@ do {							\
   case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NAN):		\
   case _FP_CLS_COMBINE(FP_CLS_ZERO,FP_CLS_NAN):		\
     R##_s = Y##_s;					\
-	/* Fall through */				\
+	  fallthrough;					\
 							\
   case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_INF):	\
   case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZERO):	\
@@ -497,7 +497,7 @@ do {							\
 							\
   case _FP_CLS_COMBINE(FP_CLS_NORMAL,FP_CLS_ZERO):	\
     FP_SET_EXCEPTION(FP_EX_DIVZERO);			\
-	  /* Fall through */				\
+	fallthrough;					\
   case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_ZERO):		\
   case _FP_CLS_COMBINE(FP_CLS_INF,FP_CLS_NORMAL):	\
     R##_c = FP_CLS_INF;					\
diff --git a/ipc/sem.c b/ipc/sem.c
index 8c0244e0365eb..f6c30a85dadf9 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -1691,7 +1691,7 @@ static long ksys_semctl(int semid, int semnum, int cmd, unsigned long arg, int v
 	case IPC_SET:
 		if (copy_semid_from_user(&semid64, p, version))
 			return -EFAULT;
-		/* fall through */
+		fallthrough;
 	case IPC_RMID:
 		return semctl_down(ns, semid, cmd, &semid64);
 	default:
@@ -1805,7 +1805,7 @@ static long compat_ksys_semctl(int semid, int semnum, int cmd, int arg, int vers
 	case IPC_SET:
 		if (copy_compat_semid_from_user(&semid64, p, version))
 			return -EFAULT;
-		/* fallthru */
+		fallthrough;
 	case IPC_RMID:
 		return semctl_down(ns, semid, cmd, &semid64);
 	default:
diff --git a/ipc/shm.c b/ipc/shm.c
index f1ed36e3ac9fe..e25c7c6106bcf 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -1179,7 +1179,7 @@ static long ksys_shmctl(int shmid, int cmd, struct shmid_ds __user *buf, int ver
 	case IPC_SET:
 		if (copy_shmid_from_user(&sem64, buf, version))
 			return -EFAULT;
-		/* fallthru */
+		fallthrough;
 	case IPC_RMID:
 		return shmctl_down(ns, shmid, cmd, &sem64);
 	case SHM_LOCK:
@@ -1374,7 +1374,7 @@ static long compat_ksys_shmctl(int shmid, int cmd, void __user *uptr, int versio
 	case IPC_SET:
 		if (copy_compat_shmid_from_user(&sem64, uptr, version))
 			return -EFAULT;
-		/* fallthru */
+		fallthrough;
 	case IPC_RMID:
 		return shmctl_down(ns, shmid, cmd, &sem64);
 	case SHM_LOCK:
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c
index a10e2997aa6c8..333b3bcfc5458 100644
--- a/kernel/auditfilter.c
+++ b/kernel/auditfilter.c
@@ -681,7 +681,7 @@ static struct audit_rule_data *audit_krule_to_data(struct audit_krule *krule)
 				data->values[i] = AUDIT_UID_UNSET;
 				break;
 			}
-			/* fall through - if set */
+			fallthrough;	/* if set */
 		default:
 			data->values[i] = f->val;
 		}
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index 83ff127ef7ae4..e21de4f1754c2 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -1794,7 +1794,7 @@ static bool cg_sockopt_is_valid_access(int off, int size,
 			return prog->expected_attach_type ==
 				BPF_CGROUP_GETSOCKOPT;
 		case offsetof(struct bpf_sockopt, optname):
-			/* fallthrough */
+			fallthrough;
 		case offsetof(struct bpf_sockopt, level):
 			if (size != size_default)
 				return false;
diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c
index f1c46529929bd..6386b7bb98f2c 100644
--- a/kernel/bpf/cpumap.c
+++ b/kernel/bpf/cpumap.c
@@ -279,7 +279,7 @@ static int cpu_map_bpf_prog_run_xdp(struct bpf_cpu_map_entry *rcpu,
 			break;
 		default:
 			bpf_warn_invalid_xdp_action(act);
-			/* fallthrough */
+			fallthrough;
 		case XDP_DROP:
 			xdp_return_frame(xdpf);
 			stats->drop++;
diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 86299a292214a..1bf960aa615cb 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -2029,7 +2029,7 @@ bpf_prog_load_check_attach(enum bpf_prog_type prog_type,
 	case BPF_PROG_TYPE_EXT:
 		if (expected_attach_type)
 			return -EINVAL;
-		/* fallthrough */
+		fallthrough;
 	default:
 		return 0;
 	}
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index ef938f17b9443..47e74f09fa376 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -5236,7 +5236,7 @@ static int adjust_ptr_min_max_vals(struct bpf_verifier_env *env,
 				off_reg == dst_reg ? dst : src);
 			return -EACCES;
 		}
-		/* fall-through */
+		fallthrough;
 	default:
 		break;
 	}
@@ -10988,7 +10988,7 @@ static int check_attach_btf_id(struct bpf_verifier_env *env)
 	default:
 		if (!prog_extension)
 			return -EINVAL;
-		/* fallthrough */
+		fallthrough;
 	case BPF_MODIFY_RETURN:
 	case BPF_LSM_MAC:
 	case BPF_TRACE_FENTRY:
diff --git a/kernel/capability.c b/kernel/capability.c
index 1444f3954d750..7c59b096c98ae 100644
--- a/kernel/capability.c
+++ b/kernel/capability.c
@@ -93,7 +93,7 @@ static int cap_validate_magic(cap_user_header_t header, unsigned *tocopy)
 		break;
 	case _LINUX_CAPABILITY_VERSION_2:
 		warn_deprecated_v2();
-		/* fall through - v3 is otherwise equivalent to v2. */
+		fallthrough;	/* v3 is otherwise equivalent to v2 */
 	case _LINUX_CAPABILITY_VERSION_3:
 		*tocopy = _LINUX_CAPABILITY_U32S_3;
 		break;
diff --git a/kernel/compat.c b/kernel/compat.c
index b8d2800bb4b71..05adfd6fa8bf9 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -255,11 +255,11 @@ get_compat_sigset(sigset_t *set, const compat_sigset_t __user *compat)
 		return -EFAULT;
 	switch (_NSIG_WORDS) {
 	case 4: set->sig[3] = v.sig[6] | (((long)v.sig[7]) << 32 );
-		/* fall through */
+		fallthrough;
 	case 3: set->sig[2] = v.sig[4] | (((long)v.sig[5]) << 32 );
-		/* fall through */
+		fallthrough;
 	case 2: set->sig[1] = v.sig[2] | (((long)v.sig[3]) << 32 );
-		/* fall through */
+		fallthrough;
 	case 1: set->sig[0] = v.sig[0] | (((long)v.sig[1]) << 32 );
 	}
 #else
diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
index a790026e42d01..cc3c43dfec449 100644
--- a/kernel/debug/gdbstub.c
+++ b/kernel/debug/gdbstub.c
@@ -1046,14 +1046,14 @@ int gdb_serial_stub(struct kgdb_state *ks)
 				return DBG_PASS_EVENT;
 			}
 #endif
-			/* Fall through */
+			fallthrough;
 		case 'C': /* Exception passing */
 			tmp = gdb_cmd_exception_pass(ks);
 			if (tmp > 0)
 				goto default_handle;
 			if (tmp == 0)
 				break;
-			/* Fall through - on tmp < 0 */
+			fallthrough;	/* on tmp < 0 */
 		case 'c': /* Continue packet */
 		case 's': /* Single step packet */
 			if (kgdb_contthread && kgdb_contthread != current) {
@@ -1062,7 +1062,7 @@ int gdb_serial_stub(struct kgdb_state *ks)
 				break;
 			}
 			dbg_activate_sw_breakpoints();
-			/* Fall through - to default processing */
+			fallthrough;	/* to default processing */
 		default:
 default_handle:
 			error = kgdb_arch_handle_exception(ks->ex_vector,
diff --git a/kernel/debug/kdb/kdb_keyboard.c b/kernel/debug/kdb/kdb_keyboard.c
index 750497b0003a6..f877a0a0d7cf2 100644
--- a/kernel/debug/kdb/kdb_keyboard.c
+++ b/kernel/debug/kdb/kdb_keyboard.c
@@ -173,11 +173,11 @@ int kdb_get_kbd_char(void)
 	case KT_LATIN:
 		if (isprint(keychar))
 			break;		/* printable characters */
-		/* fall through */
+		fallthrough;
 	case KT_SPEC:
 		if (keychar == K_ENTER)
 			break;
-		/* fall through */
+		fallthrough;
 	default:
 		return -1;	/* ignore unprintables */
 	}
diff --git a/kernel/debug/kdb/kdb_support.c b/kernel/debug/kdb/kdb_support.c
index 004c5b6c87f89..6226502ce0499 100644
--- a/kernel/debug/kdb/kdb_support.c
+++ b/kernel/debug/kdb/kdb_support.c
@@ -432,7 +432,7 @@ int kdb_getphysword(unsigned long *word, unsigned long addr, size_t size)
 				*word = w8;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		diag = KDB_BADWIDTH;
 		kdb_printf("kdb_getphysword: bad width %ld\n", (long) size);
@@ -481,7 +481,7 @@ int kdb_getword(unsigned long *word, unsigned long addr, size_t size)
 				*word = w8;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		diag = KDB_BADWIDTH;
 		kdb_printf("kdb_getword: bad width %ld\n", (long) size);
@@ -525,7 +525,7 @@ int kdb_putword(unsigned long addr, unsigned long word, size_t size)
 			diag = kdb_putarea(addr, w8);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		diag = KDB_BADWIDTH;
 		kdb_printf("kdb_putword: bad width %ld\n", (long) size);
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 5bfe8e3c6e443..7ed5248f0445e 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -10034,7 +10034,7 @@ perf_event_parse_addr_filter(struct perf_event *event, char *fstr,
 		case IF_SRC_KERNELADDR:
 		case IF_SRC_KERNEL:
 			kernel = 1;
-			/* fall through */
+			fallthrough;
 
 		case IF_SRC_FILEADDR:
 		case IF_SRC_FILE:
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index a8e14c80b405b..762a928e18f92 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -173,7 +173,7 @@ irqreturn_t __handle_irq_event_percpu(struct irq_desc *desc, unsigned int *flags
 
 			__irq_wake_thread(desc, action);
 
-			/* Fall through - to add to randomness */
+			fallthrough;	/* to add to randomness */
 		case IRQ_HANDLED:
 			*flags |= action->flags;
 			break;
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 52ac5391dcc6c..5df903fccb609 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -271,7 +271,7 @@ int irq_do_set_affinity(struct irq_data *data, const struct cpumask *mask,
 	case IRQ_SET_MASK_OK:
 	case IRQ_SET_MASK_OK_DONE:
 		cpumask_copy(desc->irq_common_data.affinity, mask);
-		/* fall through */
+		fallthrough;
 	case IRQ_SET_MASK_OK_NOCOPY:
 		irq_validate_effective_affinity(data);
 		irq_set_thread_affinity(desc);
@@ -868,7 +868,7 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned long flags)
 	case IRQ_SET_MASK_OK_DONE:
 		irqd_clear(&desc->irq_data, IRQD_TRIGGER_MASK);
 		irqd_set(&desc->irq_data, flags);
-		/* fall through */
+		fallthrough;
 
 	case IRQ_SET_MASK_OK_NOCOPY:
 		flags = irqd_get_trigger_type(&desc->irq_data);
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index 95cb74f732925..4fb15fa96734b 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -684,12 +684,12 @@ bool kallsyms_show_value(const struct cred *cred)
 	case 0:
 		if (kallsyms_for_perf())
 			return true;
-	/* fallthrough */
+		fallthrough;
 	case 1:
 		if (security_capable(cred, &init_user_ns, CAP_SYSLOG,
 				     CAP_OPT_NOAUDIT) == 0)
 			return true;
-	/* fallthrough */
+		fallthrough;
 	default:
 		return false;
 	}
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index f33769f97aca5..e7aa57fb2fdc3 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -659,7 +659,7 @@ static void power_down(void)
 		break;
 	case HIBERNATION_PLATFORM:
 		hibernation_platform_enter();
-		/* Fall through */
+		fallthrough;
 	case HIBERNATION_SHUTDOWN:
 		if (pm_power_off)
 			kernel_power_off();
diff --git a/kernel/power/qos.c b/kernel/power/qos.c
index db0bed2cae26f..ec7e1e85923e4 100644
--- a/kernel/power/qos.c
+++ b/kernel/power/qos.c
@@ -119,7 +119,7 @@ int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
 		 * and add, then see if the aggregate has changed.
 		 */
 		plist_del(node, &c->list);
-		/* fall through */
+		fallthrough;
 	case PM_QOS_ADD_REQ:
 		plist_node_init(node, new_value);
 		plist_add(node, &c->list);
@@ -188,7 +188,7 @@ bool pm_qos_update_flags(struct pm_qos_flags *pqf,
 		break;
 	case PM_QOS_UPDATE_REQ:
 		pm_qos_flags_remove_req(pqf, req);
-		/* fall through */
+		fallthrough;
 	case PM_QOS_ADD_REQ:
 		req->flags = val;
 		INIT_LIST_HEAD(&req->node);
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 8471a0f7eb322..2d95dc3f46444 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2320,7 +2320,7 @@ static int select_fallback_rq(int cpu, struct task_struct *p)
 				state = possible;
 				break;
 			}
-			/* Fall-through */
+			fallthrough;
 		case possible:
 			do_set_cpus_allowed(p, cpu_possible_mask);
 			state = fail;
diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
index 007b0a6b01527..1bd7e3af904f6 100644
--- a/kernel/sched/topology.c
+++ b/kernel/sched/topology.c
@@ -1219,13 +1219,13 @@ static void __free_domain_allocs(struct s_data *d, enum s_alloc what,
 	case sa_rootdomain:
 		if (!atomic_read(&d->rd->refcount))
 			free_rootdomain(&d->rd->rcu);
-		/* Fall through */
+		fallthrough;
 	case sa_sd:
 		free_percpu(d->sd);
-		/* Fall through */
+		fallthrough;
 	case sa_sd_storage:
 		__sdt_free(cpu_map);
-		/* Fall through */
+		fallthrough;
 	case sa_none:
 		break;
 	}
diff --git a/kernel/signal.c b/kernel/signal.c
index 42b67d2cea370..a38b3edc68511 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -851,7 +851,7 @@ static int check_kill_permission(int sig, struct kernel_siginfo *info,
 			 */
 			if (!sid || sid == task_session(current))
 				break;
-			/* fall through */
+			fallthrough;
 		default:
 			return -EPERM;
 		}
diff --git a/kernel/sys.c b/kernel/sys.c
index ca11af9d815d9..ab6c409b1159b 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -1753,7 +1753,7 @@ void getrusage(struct task_struct *p, int who, struct rusage *r)
 
 		if (who == RUSAGE_CHILDREN)
 			break;
-		/* fall through */
+		fallthrough;
 
 	case RUSAGE_SELF:
 		thread_group_cputime_adjusted(p, &tgutime, &tgstime);
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index c4038511d5c9e..95b6a708b0406 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -377,7 +377,7 @@ static bool hrtimer_fixup_activate(void *addr, enum debug_obj_state state)
 	switch (state) {
 	case ODEBUG_STATE_ACTIVE:
 		WARN_ON(1);
-		/* fall through */
+		fallthrough;
 	default:
 		return false;
 	}
diff --git a/kernel/time/posix-timers.c b/kernel/time/posix-timers.c
index 07709ac30439a..bf540f5a4115a 100644
--- a/kernel/time/posix-timers.c
+++ b/kernel/time/posix-timers.c
@@ -439,12 +439,12 @@ static struct pid *good_sigevent(sigevent_t * event)
 		rtn = pid_task(pid, PIDTYPE_PID);
 		if (!rtn || !same_thread_group(rtn, current))
 			return NULL;
-		/* FALLTHRU */
+		fallthrough;
 	case SIGEV_SIGNAL:
 	case SIGEV_THREAD:
 		if (event->sigev_signo <= 0 || event->sigev_signo > SIGRTMAX)
 			return NULL;
-		/* FALLTHRU */
+		fallthrough;
 	case SIGEV_NONE:
 		return pid;
 	default:
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index e51778c312f1c..36d7464c89625 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -381,7 +381,7 @@ void tick_broadcast_control(enum tick_broadcast_mode mode)
 	switch (mode) {
 	case TICK_BROADCAST_FORCE:
 		tick_broadcast_forced = 1;
-		/* fall through */
+		fallthrough;
 	case TICK_BROADCAST_ON:
 		cpumask_set_cpu(cpu, tick_broadcast_on);
 		if (!cpumask_test_and_set_cpu(cpu, tick_broadcast_mask)) {
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index a16764b0116e3..a50364df10543 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -666,7 +666,7 @@ static bool timer_fixup_activate(void *addr, enum debug_obj_state state)
 
 	case ODEBUG_STATE_ACTIVE:
 		WARN_ON(1);
-		/* fall through */
+		fallthrough;
 	default:
 		return false;
 	}
diff --git a/kernel/trace/blktrace.c b/kernel/trace/blktrace.c
index 7ba62d68885ae..4b3a42fc3b24f 100644
--- a/kernel/trace/blktrace.c
+++ b/kernel/trace/blktrace.c
@@ -745,7 +745,7 @@ int blk_trace_ioctl(struct block_device *bdev, unsigned cmd, char __user *arg)
 #endif
 	case BLKTRACESTART:
 		start = 1;
-		/* fall through */
+		fallthrough;
 	case BLKTRACESTOP:
 		ret = __blk_trace_startstop(q, start);
 		break;
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index bf44f6bbd0c36..78a678eeb1409 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -499,7 +499,7 @@ predicate_parse(const char *str, int nr_parens, int nr_preds,
 					ptr++;
 					break;
 				}
-				/* fall through */
+				fallthrough;
 			default:
 				parse_error(pe, FILT_ERR_TOO_MANY_PREDS,
 					    next - str);
@@ -1273,7 +1273,7 @@ static int parse_pred(const char *str, void *data,
 		switch (op) {
 		case OP_NE:
 			pred->not = 1;
-			/* Fall through */
+			fallthrough;
 		case OP_GLOB:
 		case OP_EQ:
 			break;
diff --git a/lib/asn1_decoder.c b/lib/asn1_decoder.c
index 58f72b25f8e9e..13da529e2e724 100644
--- a/lib/asn1_decoder.c
+++ b/lib/asn1_decoder.c
@@ -381,7 +381,7 @@ int asn1_ber_decoder(const struct asn1_decoder *decoder,
 	case ASN1_OP_END_SET_ACT:
 		if (unlikely(!(flags & FLAG_MATCHED)))
 			goto tag_mismatch;
-		/* fall through */
+		fallthrough;
 
 	case ASN1_OP_END_SEQ:
 	case ASN1_OP_END_SET_OF:
@@ -448,7 +448,7 @@ int asn1_ber_decoder(const struct asn1_decoder *decoder,
 			pc += asn1_op_lengths[op];
 			goto next_op;
 		}
-		/* fall through */
+		fallthrough;
 
 	case ASN1_OP_ACT:
 		ret = actions[machine[pc + 1]](context, hdr, tag, data + tdp, len);
diff --git a/lib/assoc_array.c b/lib/assoc_array.c
index 6f4bcf5245547..04c98799c3baf 100644
--- a/lib/assoc_array.c
+++ b/lib/assoc_array.c
@@ -1113,7 +1113,7 @@ struct assoc_array_edit *assoc_array_delete(struct assoc_array *array,
 						index_key))
 				goto found_leaf;
 		}
-		/* fall through */
+		fallthrough;
 	case assoc_array_walk_tree_empty:
 	case assoc_array_walk_found_wrong_shortcut:
 	default:
diff --git a/lib/bootconfig.c b/lib/bootconfig.c
index a5f701161f6bd..1b5de2a45b277 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -817,7 +817,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos)
 							q - 2);
 				break;
 			}
-			/* Fall through */
+			fallthrough;
 		case '=':
 			ret = xbc_parse_kv(&p, q, c);
 			break;
@@ -826,7 +826,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos)
 			break;
 		case '#':
 			q = skip_comment(q);
-			/* fall through */
+			fallthrough;
 		case ';':
 		case '\n':
 			ret = xbc_parse_key(&p, q);
diff --git a/lib/cmdline.c b/lib/cmdline.c
index fbb9981a04a41..55768b4f3f587 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -132,23 +132,23 @@ unsigned long long memparse(const char *ptr, char **retptr)
 	case 'E':
 	case 'e':
 		ret <<= 10;
-		/* fall through */
+		fallthrough;
 	case 'P':
 	case 'p':
 		ret <<= 10;
-		/* fall through */
+		fallthrough;
 	case 'T':
 	case 't':
 		ret <<= 10;
-		/* fall through */
+		fallthrough;
 	case 'G':
 	case 'g':
 		ret <<= 10;
-		/* fall through */
+		fallthrough;
 	case 'M':
 	case 'm':
 		ret <<= 10;
-		/* fall through */
+		fallthrough;
 	case 'K':
 	case 'k':
 		ret <<= 10;
diff --git a/lib/dim/net_dim.c b/lib/dim/net_dim.c
index a4db51c212663..06811d866775c 100644
--- a/lib/dim/net_dim.c
+++ b/lib/dim/net_dim.c
@@ -233,7 +233,7 @@ void net_dim(struct dim *dim, struct dim_sample end_sample)
 			schedule_work(&dim->work);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case DIM_START_MEASURE:
 		dim_update_sample(end_sample.event_ctr, end_sample.pkt_ctr,
 				  end_sample.byte_ctr, &dim->start_sample);
diff --git a/lib/dim/rdma_dim.c b/lib/dim/rdma_dim.c
index f7e26c7b4749f..15462d54758d3 100644
--- a/lib/dim/rdma_dim.c
+++ b/lib/dim/rdma_dim.c
@@ -59,7 +59,7 @@ static bool rdma_dim_decision(struct dim_stats *curr_stats, struct dim *dim)
 			break;
 		case DIM_STATS_WORSE:
 			dim_turn(dim);
-			/* fall through */
+			fallthrough;
 		case DIM_STATS_BETTER:
 			step_res = rdma_dim_step(dim);
 			if (step_res == DIM_ON_EDGE)
@@ -94,7 +94,7 @@ void rdma_dim(struct dim *dim, u64 completions)
 			schedule_work(&dim->work);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case DIM_START_MEASURE:
 		dim->state = DIM_MEASURE_IN_PROGRESS;
 		dim_update_sample_with_comps(curr_sample->event_ctr, 0, 0,
diff --git a/lib/glob.c b/lib/glob.c
index 0ba3ea86b5466..85ecbda45cd8c 100644
--- a/lib/glob.c
+++ b/lib/glob.c
@@ -102,7 +102,7 @@ bool __pure glob_match(char const *pat, char const *str)
 			break;
 		case '\\':
 			d = *pat++;
-			/*FALLTHROUGH*/
+			fallthrough;
 		default:	/* Literal character */
 literal:
 			if (c == d) {
diff --git a/lib/siphash.c b/lib/siphash.c
index c47bb6ff21499..a90112ee72a1f 100644
--- a/lib/siphash.c
+++ b/lib/siphash.c
@@ -68,11 +68,11 @@ u64 __siphash_aligned(const void *data, size_t len, const siphash_key_t *key)
 						  bytemask_from_count(left)));
 #else
 	switch (left) {
-	case 7: b |= ((u64)end[6]) << 48; /* fall through */
-	case 6: b |= ((u64)end[5]) << 40; /* fall through */
-	case 5: b |= ((u64)end[4]) << 32; /* fall through */
+	case 7: b |= ((u64)end[6]) << 48; fallthrough;
+	case 6: b |= ((u64)end[5]) << 40; fallthrough;
+	case 5: b |= ((u64)end[4]) << 32; fallthrough;
 	case 4: b |= le32_to_cpup(data); break;
-	case 3: b |= ((u64)end[2]) << 16; /* fall through */
+	case 3: b |= ((u64)end[2]) << 16; fallthrough;
 	case 2: b |= le16_to_cpup(data); break;
 	case 1: b |= end[0];
 	}
@@ -101,11 +101,11 @@ u64 __siphash_unaligned(const void *data, size_t len, const siphash_key_t *key)
 						  bytemask_from_count(left)));
 #else
 	switch (left) {
-	case 7: b |= ((u64)end[6]) << 48; /* fall through */
-	case 6: b |= ((u64)end[5]) << 40; /* fall through */
-	case 5: b |= ((u64)end[4]) << 32; /* fall through */
+	case 7: b |= ((u64)end[6]) << 48; fallthrough;
+	case 6: b |= ((u64)end[5]) << 40; fallthrough;
+	case 5: b |= ((u64)end[4]) << 32; fallthrough;
 	case 4: b |= get_unaligned_le32(end); break;
-	case 3: b |= ((u64)end[2]) << 16; /* fall through */
+	case 3: b |= ((u64)end[2]) << 16; fallthrough;
 	case 2: b |= get_unaligned_le16(end); break;
 	case 1: b |= end[0];
 	}
@@ -268,11 +268,11 @@ u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key)
 						  bytemask_from_count(left)));
 #else
 	switch (left) {
-	case 7: b |= ((u64)end[6]) << 48; /* fall through */
-	case 6: b |= ((u64)end[5]) << 40; /* fall through */
-	case 5: b |= ((u64)end[4]) << 32; /* fall through */
+	case 7: b |= ((u64)end[6]) << 48; fallthrough;
+	case 6: b |= ((u64)end[5]) << 40; fallthrough;
+	case 5: b |= ((u64)end[4]) << 32; fallthrough;
 	case 4: b |= le32_to_cpup(data); break;
-	case 3: b |= ((u64)end[2]) << 16; /* fall through */
+	case 3: b |= ((u64)end[2]) << 16; fallthrough;
 	case 2: b |= le16_to_cpup(data); break;
 	case 1: b |= end[0];
 	}
@@ -301,11 +301,11 @@ u32 __hsiphash_unaligned(const void *data, size_t len,
 						  bytemask_from_count(left)));
 #else
 	switch (left) {
-	case 7: b |= ((u64)end[6]) << 48; /* fall through */
-	case 6: b |= ((u64)end[5]) << 40; /* fall through */
-	case 5: b |= ((u64)end[4]) << 32; /* fall through */
+	case 7: b |= ((u64)end[6]) << 48; fallthrough;
+	case 6: b |= ((u64)end[5]) << 40; fallthrough;
+	case 5: b |= ((u64)end[4]) << 32; fallthrough;
 	case 4: b |= get_unaligned_le32(end); break;
-	case 3: b |= ((u64)end[2]) << 16; /* fall through */
+	case 3: b |= ((u64)end[2]) << 16; fallthrough;
 	case 2: b |= get_unaligned_le16(end); break;
 	case 1: b |= end[0];
 	}
@@ -431,7 +431,7 @@ u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key)
 		v0 ^= m;
 	}
 	switch (left) {
-	case 3: b |= ((u32)end[2]) << 16; /* fall through */
+	case 3: b |= ((u32)end[2]) << 16; fallthrough;
 	case 2: b |= le16_to_cpup(data); break;
 	case 1: b |= end[0];
 	}
@@ -454,7 +454,7 @@ u32 __hsiphash_unaligned(const void *data, size_t len,
 		v0 ^= m;
 	}
 	switch (left) {
-	case 3: b |= ((u32)end[2]) << 16; /* fall through */
+	case 3: b |= ((u32)end[2]) << 16; fallthrough;
 	case 2: b |= get_unaligned_le16(end); break;
 	case 1: b |= end[0];
 	}
diff --git a/lib/ts_fsm.c b/lib/ts_fsm.c
index ab749ec10ab53..64fd9015ad80b 100644
--- a/lib/ts_fsm.c
+++ b/lib/ts_fsm.c
@@ -193,7 +193,7 @@ static unsigned int fsm_find(struct ts_config *conf, struct ts_state *state)
 				TOKEN_MISMATCH();
 
 			block_idx++;
-			/* fall through */
+			fallthrough;
 
 		case TS_FSM_ANY:
 			if (next == NULL)
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index c155769559abe..19ebe1b257eca 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1265,7 +1265,7 @@ char *mac_address_string(char *buf, char *end, u8 *addr,
 
 	case 'R':
 		reversed = true;
-		/* fall through */
+		fallthrough;
 
 	default:
 		separator = ':';
@@ -1681,7 +1681,8 @@ char *uuid_string(char *buf, char *end, const u8 *addr,
 
 	switch (*(++fmt)) {
 	case 'L':
-		uc = true;		/* fall-through */
+		uc = true;
+		fallthrough;
 	case 'l':
 		index = guid_index;
 		break;
@@ -2218,7 +2219,7 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 	case 'S':
 	case 's':
 		ptr = dereference_symbol_descriptor(ptr);
-		/* Fallthrough */
+		fallthrough;
 	case 'B':
 		return symbol_string(buf, end, ptr, spec, fmt);
 	case 'R':
@@ -2449,7 +2450,7 @@ int format_decode(const char *fmt, struct printf_spec *spec)
 
 	case 'x':
 		spec->flags |= SMALL;
-		/* fall through */
+		fallthrough;
 
 	case 'X':
 		spec->base = 16;
@@ -2467,7 +2468,7 @@ int format_decode(const char *fmt, struct printf_spec *spec)
 		 * utility, treat it as any other invalid or
 		 * unsupported format specifier.
 		 */
-		/* Fall-through */
+		fallthrough;
 
 	default:
 		WARN_ONCE(1, "Please remove unsupported %%%c in format string\n", *fmt);
@@ -3410,10 +3411,10 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
 			break;
 		case 'i':
 			base = 0;
-			/* fall through */
+			fallthrough;
 		case 'd':
 			is_sign = true;
-			/* fall through */
+			fallthrough;
 		case 'u':
 			break;
 		case '%':
diff --git a/lib/xz/xz_dec_lzma2.c b/lib/xz/xz_dec_lzma2.c
index 9f336bc07ed61..ca2603abee08e 100644
--- a/lib/xz/xz_dec_lzma2.c
+++ b/lib/xz/xz_dec_lzma2.c
@@ -1043,7 +1043,7 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s,
 
 			s->lzma2.sequence = SEQ_LZMA_PREPARE;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_LZMA_PREPARE:
 			if (s->lzma2.compressed < RC_INIT_BYTES)
@@ -1055,7 +1055,7 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s,
 			s->lzma2.compressed -= RC_INIT_BYTES;
 			s->lzma2.sequence = SEQ_LZMA_RUN;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_LZMA_RUN:
 			/*
diff --git a/lib/xz/xz_dec_stream.c b/lib/xz/xz_dec_stream.c
index bd1d182419d7e..fea86deaaa01d 100644
--- a/lib/xz/xz_dec_stream.c
+++ b/lib/xz/xz_dec_stream.c
@@ -583,7 +583,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 			if (ret != XZ_OK)
 				return ret;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_BLOCK_START:
 			/* We need one byte of input to continue. */
@@ -608,7 +608,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 			s->temp.pos = 0;
 			s->sequence = SEQ_BLOCK_HEADER;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_BLOCK_HEADER:
 			if (!fill_temp(s, b))
@@ -620,7 +620,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_BLOCK_UNCOMPRESS;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_BLOCK_UNCOMPRESS:
 			ret = dec_block(s, b);
@@ -629,7 +629,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_BLOCK_PADDING;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_BLOCK_PADDING:
 			/*
@@ -651,7 +651,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_BLOCK_CHECK;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_BLOCK_CHECK:
 			if (s->check_type == XZ_CHECK_CRC32) {
@@ -675,7 +675,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_INDEX_PADDING;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_INDEX_PADDING:
 			while ((s->index.size + (b->in_pos - s->in_start))
@@ -699,7 +699,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_INDEX_CRC32;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_INDEX_CRC32:
 			ret = crc32_validate(s, b);
@@ -709,7 +709,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 			s->temp.size = STREAM_HEADER_SIZE;
 			s->sequence = SEQ_STREAM_FOOTER;
 
-		/* Fall through */
+			fallthrough;
 
 		case SEQ_STREAM_FOOTER:
 			if (!fill_temp(s, b))
diff --git a/lib/zstd/bitstream.h b/lib/zstd/bitstream.h
index 3a49784d5c61a..7c65c66e41fd4 100644
--- a/lib/zstd/bitstream.h
+++ b/lib/zstd/bitstream.h
@@ -259,15 +259,15 @@ ZSTD_STATIC size_t BIT_initDStream(BIT_DStream_t *bitD, const void *srcBuffer, s
 		bitD->bitContainer = *(const BYTE *)(bitD->start);
 		switch (srcSize) {
 		case 7: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[6]) << (sizeof(bitD->bitContainer) * 8 - 16);
-			/* fall through */
+			fallthrough;
 		case 6: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[5]) << (sizeof(bitD->bitContainer) * 8 - 24);
-			/* fall through */
+			fallthrough;
 		case 5: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[4]) << (sizeof(bitD->bitContainer) * 8 - 32);
-			/* fall through */
+			fallthrough;
 		case 4: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[3]) << 24;
-			/* fall through */
+			fallthrough;
 		case 3: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[2]) << 16;
-			/* fall through */
+			fallthrough;
 		case 2: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[1]) << 8;
 		default:;
 		}
diff --git a/lib/zstd/compress.c b/lib/zstd/compress.c
index 5e0b67003e550..b080264ed3adf 100644
--- a/lib/zstd/compress.c
+++ b/lib/zstd/compress.c
@@ -3182,7 +3182,7 @@ static size_t ZSTD_compressStream_generic(ZSTD_CStream *zcs, void *dst, size_t *
 				zcs->outBuffFlushedSize = 0;
 				zcs->stage = zcss_flush; /* pass-through to flush stage */
 			}
-			/* fall through */
+			fallthrough;
 
 		case zcss_flush: {
 			size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize;
diff --git a/lib/zstd/decompress.c b/lib/zstd/decompress.c
index 269ee9a796c1a..66cd487a326a8 100644
--- a/lib/zstd/decompress.c
+++ b/lib/zstd/decompress.c
@@ -442,7 +442,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx *dctx, const void *src, size_t srcSize
 		case set_repeat:
 			if (dctx->litEntropy == 0)
 				return ERROR(dictionary_corrupted);
-		/* fall-through */
+			fallthrough;
 		case set_compressed:
 			if (srcSize < 5)
 				return ERROR(corruption_detected); /* srcSize >= MIN_CBLOCK_SIZE == 3; here we need up to 5 for case 3 */
@@ -1768,7 +1768,7 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx *dctx, void *dst, size_t dstCapacity, c
 			return 0;
 		}
 		dctx->expected = 0; /* not necessary to copy more */
-		/* fall through */
+		fallthrough;
 
 	case ZSTDds_decodeFrameHeader:
 		memcpy(dctx->headerBuffer + ZSTD_frameHeaderSize_prefix, src, dctx->expected);
@@ -2309,7 +2309,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 		switch (zds->stage) {
 		case zdss_init:
 			ZSTD_resetDStream(zds); /* transparent reset on starting decoding a new frame */
-						/* fall-through */
+			fallthrough;
 
 		case zdss_loadHeader: {
 			size_t const hSize = ZSTD_getFrameParams(&zds->fParams, zds->headerBuffer, zds->lhSize);
@@ -2376,7 +2376,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 			}
 			zds->stage = zdss_read;
 		}
-		/* fall through */
+			fallthrough;
 
 		case zdss_read: {
 			size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx);
@@ -2405,7 +2405,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 			zds->stage = zdss_load;
 			/* pass-through */
 		}
-		/* fall through */
+			fallthrough;
 
 		case zdss_load: {
 			size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx);
@@ -2438,7 +2438,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 				/* pass-through */
 			}
 		}
-		/* fall through */
+			fallthrough;
 
 		case zdss_flush: {
 			size_t const toFlushSize = zds->outEnd - zds->outStart;
diff --git a/lib/zstd/huf_compress.c b/lib/zstd/huf_compress.c
index e727812d12aad..08b4ae80aed43 100644
--- a/lib/zstd/huf_compress.c
+++ b/lib/zstd/huf_compress.c
@@ -556,9 +556,9 @@ size_t HUF_compress1X_usingCTable(void *dst, size_t dstSize, const void *src, si
 	n = srcSize & ~3; /* join to mod 4 */
 	switch (srcSize & 3) {
 	case 3: HUF_encodeSymbol(&bitC, ip[n + 2], CTable); HUF_FLUSHBITS_2(&bitC);
-		/* fall through */
+		fallthrough;
 	case 2: HUF_encodeSymbol(&bitC, ip[n + 1], CTable); HUF_FLUSHBITS_1(&bitC);
-		/* fall through */
+		fallthrough;
 	case 1: HUF_encodeSymbol(&bitC, ip[n + 0], CTable); HUF_FLUSHBITS(&bitC);
 	case 0:
 	default:;
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 3dd7c972677be..ec8408d1638fb 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -367,7 +367,7 @@ static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 	case SIOCSHWTSTAMP:
 		if (!net_eq(dev_net(dev), &init_net))
 			break;
-		/* fall through */
+		fallthrough;
 	case SIOCGMIIPHY:
 	case SIOCGMIIREG:
 	case SIOCSMIIREG:
diff --git a/net/9p/trans_xen.c b/net/9p/trans_xen.c
index 3debad93be1a6..bc8807d9281fd 100644
--- a/net/9p/trans_xen.c
+++ b/net/9p/trans_xen.c
@@ -520,7 +520,7 @@ static void xen_9pfs_front_changed(struct xenbus_device *dev,
 	case XenbusStateClosed:
 		if (dev->state == XenbusStateClosed)
 			break;
-		/* fall through - Missed the backend's CLOSING state */
+		fallthrough;	/* Missed the backend's CLOSING state */
 	case XenbusStateClosing:
 		xenbus_frontend_closed(dev);
 		break;
diff --git a/net/atm/common.c b/net/atm/common.c
index 84367b844b147..1cfa9bf1d1871 100644
--- a/net/atm/common.c
+++ b/net/atm/common.c
@@ -297,7 +297,7 @@ static int adjust_tp(struct atm_trafprm *tp, unsigned char aal)
 		break;
 	default:
 		pr_warn("AAL problems ... (%d)\n", aal);
-		/* fall through */
+		fallthrough;
 	case ATM_AAL5:
 		max_sdu = ATM_MAX_AAL5_PDU;
 	}
@@ -417,7 +417,7 @@ static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi,
 	case ATM_NO_AAL:
 		/* ATM_AAL5 is also used in the "0 for default" case */
 		vcc->qos.aal = ATM_AAL5;
-		/* fall through */
+		fallthrough;
 	case ATM_AAL5:
 		error = atm_init_aal5(vcc);
 		vcc->stats = &dev->stats.aal5;
diff --git a/net/atm/lec.c b/net/atm/lec.c
index 875fc0bc17800..b570ef919c28f 100644
--- a/net/atm/lec.c
+++ b/net/atm/lec.c
@@ -380,7 +380,7 @@ static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
 
 		if (mesg->content.normal.no_source_le_narp)
 			break;
-		/* FALL THROUGH */
+		fallthrough;
 	case l_arp_update:
 		lec_arp_update(priv, mesg->content.normal.mac_addr,
 			       mesg->content.normal.atm_addr,
diff --git a/net/atm/resources.c b/net/atm/resources.c
index 94bdc6527ee8a..53236986dfe09 100644
--- a/net/atm/resources.c
+++ b/net/atm/resources.c
@@ -266,7 +266,7 @@ int atm_dev_ioctl(unsigned int cmd, void __user *buf, int __user *sioc_len,
 				goto done;
 			}
 	}
-	/* fall through */
+		fallthrough;
 	case ATM_SETESIF:
 	{
 		unsigned char esi[ESI_LEN];
@@ -288,7 +288,7 @@ int atm_dev_ioctl(unsigned int cmd, void __user *buf, int __user *sioc_len,
 			error = -EPERM;
 			goto done;
 		}
-		/* fall through */
+		fallthrough;
 	case ATM_GETSTAT:
 		size = sizeof(struct atm_dev_stats);
 		error = fetch_stats(dev, buf, cmd == ATM_GETSTATZ);
@@ -361,7 +361,7 @@ int atm_dev_ioctl(unsigned int cmd, void __user *buf, int __user *sioc_len,
 			error = -EINVAL;
 			goto done;
 		}
-		/* fall through */
+		fallthrough;
 	case ATM_SETCIRANGE:
 	case SONET_GETSTATZ:
 	case SONET_SETDIAG:
@@ -371,7 +371,7 @@ int atm_dev_ioctl(unsigned int cmd, void __user *buf, int __user *sioc_len,
 			error = -EPERM;
 			goto done;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		if (IS_ENABLED(CONFIG_COMPAT) && compat) {
 #ifdef CONFIG_COMPAT
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index 99eb8c6c0fbcc..a66f211726e7c 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -425,7 +425,7 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
 	case BPF_PROG_TYPE_SCHED_CLS:
 	case BPF_PROG_TYPE_SCHED_ACT:
 		is_l2 = true;
-		/* fall through */
+		fallthrough;
 	case BPF_PROG_TYPE_LWT_IN:
 	case BPF_PROG_TYPE_LWT_OUT:
 	case BPF_PROG_TYPE_LWT_XMIT:
diff --git a/net/can/j1939/socket.c b/net/can/j1939/socket.c
index b93876c57fc48..1be4c898b2fa8 100644
--- a/net/can/j1939/socket.c
+++ b/net/can/j1939/socket.c
@@ -1086,7 +1086,7 @@ static int j1939_sk_send_loop(struct j1939_priv *priv,  struct sock *sk,
 		break;
 	case -ERESTARTSYS:
 		ret = -EINTR;
-		/* fall through */
+		fallthrough;
 	case -EAGAIN: /* OK */
 		if (todo_size != size)
 			ret = size - todo_size;
diff --git a/net/can/j1939/transport.c b/net/can/j1939/transport.c
index a8dd956b5e8e1..0cec4152f9797 100644
--- a/net/can/j1939/transport.c
+++ b/net/can/j1939/transport.c
@@ -860,7 +860,7 @@ static int j1939_xtp_txnext_transmiter(struct j1939_session *session)
 				return ret;
 		}
 
-		/* fall through */
+		fallthrough;
 	case J1939_TP_CMD_CTS:
 	case 0xff: /* did some data */
 	case J1939_ETP_CMD_DPO:
@@ -1764,12 +1764,12 @@ static void j1939_xtp_rx_dat_one(struct j1939_session *session,
 	case J1939_ETP_CMD_DPO:
 		if (skcb->addr.type == J1939_ETP)
 			break;
-		/* fall through */
-	case J1939_TP_CMD_BAM: /* fall through */
+		fallthrough;
+	case J1939_TP_CMD_BAM:
 	case J1939_TP_CMD_CTS: /* fall through */
 		if (skcb->addr.type != J1939_ETP)
 			break;
-		/* fall through */
+		fallthrough;
 	default:
 		netdev_info(priv->ndev, "%s: 0x%p: last %02x\n", __func__,
 			    session, session->last_cmd);
@@ -1965,8 +1965,8 @@ static void j1939_tp_cmd_recv(struct j1939_priv *priv, struct sk_buff *skb)
 	switch (cmd) {
 	case J1939_ETP_CMD_RTS:
 		extd = J1939_ETP;
-		/* fall through */
-	case J1939_TP_CMD_BAM: /* fall through */
+		fallthrough;
+	case J1939_TP_CMD_BAM:
 	case J1939_TP_CMD_RTS: /* fall through */
 		if (skcb->addr.type != extd)
 			return;
@@ -1987,7 +1987,7 @@ static void j1939_tp_cmd_recv(struct j1939_priv *priv, struct sk_buff *skb)
 
 	case J1939_ETP_CMD_CTS:
 		extd = J1939_ETP;
-		/* fall through */
+		fallthrough;
 	case J1939_TP_CMD_CTS:
 		if (skcb->addr.type != extd)
 			return;
@@ -2014,7 +2014,7 @@ static void j1939_tp_cmd_recv(struct j1939_priv *priv, struct sk_buff *skb)
 
 	case J1939_ETP_CMD_EOMA:
 		extd = J1939_ETP;
-		/* fall through */
+		fallthrough;
 	case J1939_TP_CMD_EOMA:
 		if (skcb->addr.type != extd)
 			return;
@@ -2050,14 +2050,14 @@ int j1939_tp_recv(struct j1939_priv *priv, struct sk_buff *skb)
 	switch (skcb->addr.pgn) {
 	case J1939_ETP_PGN_DAT:
 		skcb->addr.type = J1939_ETP;
-		/* fall through */
+		fallthrough;
 	case J1939_TP_PGN_DAT:
 		j1939_xtp_rx_dat(priv, skb);
 		break;
 
 	case J1939_ETP_PGN_CTL:
 		skcb->addr.type = J1939_ETP;
-		/* fall through */
+		fallthrough;
 	case J1939_TP_PGN_CTL:
 		if (skb->len < 8)
 			return 0; /* Don't care. Nothing to extract here */
diff --git a/net/ceph/ceph_hash.c b/net/ceph/ceph_hash.c
index 81e1e006c5404..16a47c0eef374 100644
--- a/net/ceph/ceph_hash.c
+++ b/net/ceph/ceph_hash.c
@@ -50,35 +50,35 @@ unsigned int ceph_str_hash_rjenkins(const char *str, unsigned int length)
 	switch (len) {
 	case 11:
 		c = c + ((__u32)k[10] << 24);
-		/* fall through */
+		fallthrough;
 	case 10:
 		c = c + ((__u32)k[9] << 16);
-		/* fall through */
+		fallthrough;
 	case 9:
 		c = c + ((__u32)k[8] << 8);
 		/* the first byte of c is reserved for the length */
-		/* fall through */
+		fallthrough;
 	case 8:
 		b = b + ((__u32)k[7] << 24);
-		/* fall through */
+		fallthrough;
 	case 7:
 		b = b + ((__u32)k[6] << 16);
-		/* fall through */
+		fallthrough;
 	case 6:
 		b = b + ((__u32)k[5] << 8);
-		/* fall through */
+		fallthrough;
 	case 5:
 		b = b + k[4];
-		/* fall through */
+		fallthrough;
 	case 4:
 		a = a + ((__u32)k[3] << 24);
-		/* fall through */
+		fallthrough;
 	case 3:
 		a = a + ((__u32)k[2] << 16);
-		/* fall through */
+		fallthrough;
 	case 2:
 		a = a + ((__u32)k[1] << 8);
-		/* fall through */
+		fallthrough;
 	case 1:
 		a = a + k[0];
 		/* case 0: nothing left to add */
diff --git a/net/ceph/crush/mapper.c b/net/ceph/crush/mapper.c
index 07e5614eb3f16..7057f8db4f99a 100644
--- a/net/ceph/crush/mapper.c
+++ b/net/ceph/crush/mapper.c
@@ -987,7 +987,7 @@ int crush_do_rule(const struct crush_map *map,
 		case CRUSH_RULE_CHOOSELEAF_FIRSTN:
 		case CRUSH_RULE_CHOOSE_FIRSTN:
 			firstn = 1;
-			/* fall through */
+			fallthrough;
 		case CRUSH_RULE_CHOOSELEAF_INDEP:
 		case CRUSH_RULE_CHOOSE_INDEP:
 			if (wsize == 0)
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 27d6ab11f9ee8..bdfd66ba38431 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -412,7 +412,7 @@ static void ceph_sock_state_change(struct sock *sk)
 	switch (sk->sk_state) {
 	case TCP_CLOSE:
 		dout("%s TCP_CLOSE\n", __func__);
-		/* fall through */
+		fallthrough;
 	case TCP_CLOSE_WAIT:
 		dout("%s TCP_CLOSE_WAIT\n", __func__);
 		con_sock_state_closing(con);
@@ -2751,7 +2751,7 @@ static int try_read(struct ceph_connection *con)
 			switch (ret) {
 			case -EBADMSG:
 				con->error_msg = "bad crc/signature";
-				/* fall through */
+				fallthrough;
 			case -EBADE:
 				ret = -EIO;
 				break;
diff --git a/net/ceph/mon_client.c b/net/ceph/mon_client.c
index 3d8c8015e976f..d633a0aeaa552 100644
--- a/net/ceph/mon_client.c
+++ b/net/ceph/mon_client.c
@@ -1307,7 +1307,7 @@ static struct ceph_msg *mon_alloc_msg(struct ceph_connection *con,
 		 * request had a non-zero tid.  Work around this weirdness
 		 * by allocating a new message.
 		 */
-		/* fall through */
+		fallthrough;
 	case CEPH_MSG_MON_MAP:
 	case CEPH_MSG_MDS_MAP:
 	case CEPH_MSG_OSD_MAP:
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index e4fbcad6e7d83..7901ab6c79fd2 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -3854,7 +3854,7 @@ static void scan_requests(struct ceph_osd *osd,
 			if (!force_resend && !force_resend_writes)
 				break;
 
-			/* fall through */
+			fallthrough;
 		case CALC_TARGET_NEED_RESEND:
 			cancel_linger_map_check(lreq);
 			/*
@@ -3891,7 +3891,7 @@ static void scan_requests(struct ceph_osd *osd,
 			     !force_resend_writes))
 				break;
 
-			/* fall through */
+			fallthrough;
 		case CALC_TARGET_NEED_RESEND:
 			cancel_map_check(req);
 			unlink_request(osd, req);
diff --git a/net/core/dev.c b/net/core/dev.c
index d42c9ea0c3c03..b9c6f31ae96eb 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4690,10 +4690,10 @@ static u32 netif_receive_generic_xdp(struct sk_buff *skb,
 		break;
 	default:
 		bpf_warn_invalid_xdp_action(act);
-		/* fall through */
+		fallthrough;
 	case XDP_ABORTED:
 		trace_xdp_exception(skb->dev, xdp_prog, act);
-		/* fall through */
+		fallthrough;
 	case XDP_DROP:
 	do_drop:
 		kfree_skb(skb);
diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index b2cf9b7bb7b8c..205e92e604ef7 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -322,7 +322,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
 		err = net_hwtstamp_validate(ifr);
 		if (err)
 			return err;
-		/* fall through */
+		fallthrough;
 
 	/*
 	 *	Unknown or private ioctl
@@ -478,7 +478,7 @@ int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, bool *need_c
 	case SIOCSIFTXQLEN:
 		if (!capable(CAP_NET_ADMIN))
 			return -EPERM;
-		/* fall through */
+		fallthrough;
 	/*
 	 *	These ioctl calls:
 	 *	- require local superuser power.
@@ -503,7 +503,7 @@ int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, bool *need_c
 	case SIOCSHWTSTAMP:
 		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
 			return -EPERM;
-		/* fall through */
+		fallthrough;
 	case SIOCBONDSLAVEINFOQUERY:
 	case SIOCBONDINFOQUERY:
 		dev_load(net, ifr->ifr_name);
diff --git a/net/core/devlink.c b/net/core/devlink.c
index e5feb87beca7c..80ec1cd81c647 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -6196,8 +6196,8 @@ devlink_trap_action_get_from_info(struct genl_info *info,
 
 	val = nla_get_u8(info->attrs[DEVLINK_ATTR_TRAP_ACTION]);
 	switch (val) {
-	case DEVLINK_TRAP_ACTION_DROP: /* fall-through */
-	case DEVLINK_TRAP_ACTION_TRAP: /* fall-through */
+	case DEVLINK_TRAP_ACTION_DROP:
+	case DEVLINK_TRAP_ACTION_TRAP:
 	case DEVLINK_TRAP_ACTION_MIRROR:
 		*p_trap_action = val;
 		break;
diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c
index b09bebeadf0b2..9704522b08721 100644
--- a/net/core/drop_monitor.c
+++ b/net/core/drop_monitor.c
@@ -1189,7 +1189,7 @@ static int net_dm_alert_mode_get_from_info(struct genl_info *info,
 	val = nla_get_u8(info->attrs[NET_DM_ATTR_ALERT_MODE]);
 
 	switch (val) {
-	case NET_DM_ALERT_MODE_SUMMARY: /* fall-through */
+	case NET_DM_ALERT_MODE_SUMMARY:
 	case NET_DM_ALERT_MODE_PACKET:
 		*p_alert_mode = val;
 		break;
diff --git a/net/core/filter.c b/net/core/filter.c
index b2df52086445f..1f647ab986b61 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -9223,7 +9223,7 @@ sk_reuseport_is_valid_access(int off, int size,
 	case bpf_ctx_range(struct sk_reuseport_md, eth_protocol):
 		if (size < sizeof_field(struct sk_buff, protocol))
 			return false;
-		/* fall through */
+		fallthrough;
 	case bpf_ctx_range(struct sk_reuseport_md, ip_protocol):
 	case bpf_ctx_range(struct sk_reuseport_md, bind_inany):
 	case bpf_ctx_range(struct sk_reuseport_md, len):
diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index b53b6d38c4dff..95f4c6b8f51a3 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3430,7 +3430,7 @@ static void pktgen_xmit(struct pktgen_dev *pkt_dev)
 		net_info_ratelimited("%s xmit error: %d\n",
 				     pkt_dev->odevname, ret);
 		pkt_dev->errors++;
-		/* fall through */
+		fallthrough;
 	case NETDEV_TX_BUSY:
 		/* Retry it next time */
 		refcount_dec(&(pkt_dev->skb->users));
diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index 6a32a1fd34f8c..649583158983a 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -772,7 +772,6 @@ static void sk_psock_verdict_apply(struct sk_psock *psock,
 		sk_psock_skb_redirect(skb);
 		break;
 	case __SK_DROP:
-		/* fall-through */
 	default:
 out_free:
 		kfree_skb(skb);
diff --git a/net/core/sock.c b/net/core/sock.c
index e4f40b175acb7..f8e5ccc452724 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1008,7 +1008,7 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		break;
 	case SO_TIMESTAMPING_NEW:
 		sock_set_flag(sk, SOCK_TSTAMP_NEW);
-		/* fall through */
+		fallthrough;
 	case SO_TIMESTAMPING_OLD:
 		if (val & ~SOF_TIMESTAMPING_MASK) {
 			ret = -EINVAL;
diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index aef72f6a28291..b9ee1a4a89554 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -608,7 +608,7 @@ static void ccid3_hc_rx_send_feedback(struct sock *sk,
 		 */
 		if (hc->rx_x_recv > 0)
 			break;
-		/* fall through */
+		fallthrough;
 	case CCID3_FBACK_PERIODIC:
 		delta = ktime_us_delta(now, hc->rx_tstamp_last_feedback);
 		if (delta <= 0)
diff --git a/net/dccp/feat.c b/net/dccp/feat.c
index afc071ea1271e..788dd629c4204 100644
--- a/net/dccp/feat.c
+++ b/net/dccp/feat.c
@@ -1407,7 +1407,8 @@ int dccp_feat_parse_options(struct sock *sk, struct dccp_request_sock *dreq,
 	 *	Negotiation during connection setup
 	 */
 	case DCCP_LISTEN:
-		server = true;			/* fall through */
+		server = true;
+		fallthrough;
 	case DCCP_REQUESTING:
 		switch (opt) {
 		case DCCPO_CHANGE_L:
diff --git a/net/dccp/input.c b/net/dccp/input.c
index bd9cfdb67436c..2cbb757a894f8 100644
--- a/net/dccp/input.c
+++ b/net/dccp/input.c
@@ -64,7 +64,7 @@ static int dccp_rcv_close(struct sock *sk, struct sk_buff *skb)
 		 */
 		if (dccp_sk(sk)->dccps_role != DCCP_ROLE_CLIENT)
 			break;
-		/* fall through */
+		fallthrough;
 	case DCCP_REQUESTING:
 	case DCCP_ACTIVE_CLOSEREQ:
 		dccp_send_reset(sk, DCCP_RESET_CODE_CLOSED);
@@ -76,7 +76,7 @@ static int dccp_rcv_close(struct sock *sk, struct sk_buff *skb)
 		queued = 1;
 		dccp_fin(sk, skb);
 		dccp_set_state(sk, DCCP_PASSIVE_CLOSE);
-		/* fall through */
+		fallthrough;
 	case DCCP_PASSIVE_CLOSE:
 		/*
 		 * Retransmitted Close: we have already enqueued the first one.
@@ -113,7 +113,7 @@ static int dccp_rcv_closereq(struct sock *sk, struct sk_buff *skb)
 		queued = 1;
 		dccp_fin(sk, skb);
 		dccp_set_state(sk, DCCP_PASSIVE_CLOSEREQ);
-		/* fall through */
+		fallthrough;
 	case DCCP_PASSIVE_CLOSEREQ:
 		sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_HUP);
 	}
@@ -530,7 +530,7 @@ static int dccp_rcv_respond_partopen_state_process(struct sock *sk,
 	case DCCP_PKT_DATA:
 		if (sk->sk_state == DCCP_RESPOND)
 			break;
-		/* fall through */
+		fallthrough;
 	case DCCP_PKT_DATAACK:
 	case DCCP_PKT_ACK:
 		/*
@@ -684,7 +684,7 @@ int dccp_rcv_state_process(struct sock *sk, struct sk_buff *skb,
 		/* Step 8: if using Ack Vectors, mark packet acknowledgeable */
 		dccp_handle_ackvec_processing(sk, skb);
 		dccp_deliver_input_to_ccids(sk, skb);
-		/* fall through */
+		fallthrough;
 	case DCCP_RESPOND:
 		queued = dccp_rcv_respond_partopen_state_process(sk, skb,
 								 dh, len);
diff --git a/net/dccp/options.c b/net/dccp/options.c
index 51aaba7a5d456..d24cad05001e5 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -225,7 +225,7 @@ int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq,
 			 * interested. The RX CCID need not parse Ack Vectors,
 			 * since it is only interested in clearing old state.
 			 */
-			/* fall through */
+			fallthrough;
 		case DCCPO_MIN_TX_CCID_SPECIFIC ... DCCPO_MAX_TX_CCID_SPECIFIC:
 			if (ccid_hc_tx_parse_options(dp->dccps_hc_tx_ccid, sk,
 						     pkt_type, opt, value, len))
diff --git a/net/dccp/output.c b/net/dccp/output.c
index 6433187a5cc44..50e6d5699bb29 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -62,7 +62,7 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
 		switch (dcb->dccpd_type) {
 		case DCCP_PKT_DATA:
 			set_ack = 0;
-			/* fall through */
+			fallthrough;
 		case DCCP_PKT_DATAACK:
 		case DCCP_PKT_RESET:
 			break;
@@ -72,12 +72,12 @@ static int dccp_transmit_skb(struct sock *sk, struct sk_buff *skb)
 			/* Use ISS on the first (non-retransmitted) Request. */
 			if (icsk->icsk_retransmits == 0)
 				dcb->dccpd_seq = dp->dccps_iss;
-			/* fall through */
+			fallthrough;
 
 		case DCCP_PKT_SYNC:
 		case DCCP_PKT_SYNCACK:
 			ackno = dcb->dccpd_ack_seq;
-			/* fall through */
+			fallthrough;
 		default:
 			/*
 			 * Set owner/destructor: some skbs are allocated via
@@ -481,7 +481,7 @@ struct sk_buff *dccp_ctl_make_reset(struct sock *sk, struct sk_buff *rcv_skb)
 	case DCCP_RESET_CODE_PACKET_ERROR:
 		dhr->dccph_reset_data[0] = rxdh->dccph_type;
 		break;
-	case DCCP_RESET_CODE_OPTION_ERROR:	/* fall through */
+	case DCCP_RESET_CODE_OPTION_ERROR:
 	case DCCP_RESET_CODE_MANDATORY_ERROR:
 		memcpy(dhr->dccph_reset_data, dcb->dccpd_reset_data, 3);
 		break;
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index d148ab1530e57..6d705d90c6149 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -101,7 +101,7 @@ void dccp_set_state(struct sock *sk, const int state)
 		if (inet_csk(sk)->icsk_bind_hash != NULL &&
 		    !(sk->sk_userlocks & SOCK_BINDPORT_LOCK))
 			inet_put_port(sk);
-		/* fall through */
+		fallthrough;
 	default:
 		if (oldstate == DCCP_OPEN)
 			DCCP_DEC_STATS(DCCP_MIB_CURRESTAB);
@@ -834,7 +834,7 @@ int dccp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, int nonblock,
 		case DCCP_PKT_CLOSEREQ:
 			if (!(flags & MSG_PEEK))
 				dccp_finish_passive_close(sk);
-			/* fall through */
+			fallthrough;
 		case DCCP_PKT_RESET:
 			dccp_pr_debug("found fin (%s) ok!\n",
 				      dccp_packet_name(dh->dccph_type));
@@ -960,7 +960,7 @@ static void dccp_terminate_connection(struct sock *sk)
 	case DCCP_PARTOPEN:
 		dccp_pr_debug("Stop PARTOPEN timer (%p)\n", sk);
 		inet_csk_clear_xmit_timer(sk, ICSK_TIME_DACK);
-		/* fall through */
+		fallthrough;
 	case DCCP_OPEN:
 		dccp_send_close(sk, 1);
 
@@ -969,7 +969,7 @@ static void dccp_terminate_connection(struct sock *sk)
 			next_state = DCCP_ACTIVE_CLOSEREQ;
 		else
 			next_state = DCCP_CLOSING;
-		/* fall through */
+		fallthrough;
 	default:
 		dccp_set_state(sk, next_state);
 	}
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index 3b53d766789d4..5dbd45dc35ad3 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -623,12 +623,12 @@ static void dn_destroy_sock(struct sock *sk)
 		goto disc_reject;
 	case DN_RUN:
 		scp->state = DN_DI;
-		/* fall through */
+		fallthrough;
 	case DN_DI:
 	case DN_DR:
 disc_reject:
 		dn_nsp_send_disc(sk, NSP_DISCINIT, 0, sk->sk_allocation);
-		/* fall through */
+		fallthrough;
 	case DN_NC:
 	case DN_NR:
 	case DN_RJ:
@@ -642,7 +642,7 @@ static void dn_destroy_sock(struct sock *sk)
 		break;
 	default:
 		printk(KERN_DEBUG "DECnet: dn_destroy_sock passed socket in invalid state\n");
-		/* fall through */
+		fallthrough;
 	case DN_O:
 		dn_stop_slow_timer(sk);
 
diff --git a/net/decnet/dn_nsp_in.c b/net/decnet/dn_nsp_in.c
index c68503a180259..c97bdca5ec30f 100644
--- a/net/decnet/dn_nsp_in.c
+++ b/net/decnet/dn_nsp_in.c
@@ -483,7 +483,7 @@ static void dn_nsp_disc_conf(struct sock *sk, struct sk_buff *skb)
 		break;
 	case DN_RUN:
 		sk->sk_shutdown |= SHUTDOWN_MASK;
-		/* fall through */
+		fallthrough;
 	case DN_CC:
 		scp->state = DN_CN;
 	}
diff --git a/net/decnet/dn_table.c b/net/decnet/dn_table.c
index 33fefb0aebca4..4086f9c746af4 100644
--- a/net/decnet/dn_table.c
+++ b/net/decnet/dn_table.c
@@ -156,7 +156,7 @@ static void dn_rehash_zone(struct dn_zone *dz)
 	default:
 		printk(KERN_DEBUG "DECnet: dn_rehash_zone: BUG! %d\n",
 		       old_divisor);
-		/* fall through */
+		fallthrough;
 	case 256:
 		new_divisor = 1024;
 		new_hashmask = 0x3FF;
diff --git a/net/decnet/sysctl_net_decnet.c b/net/decnet/sysctl_net_decnet.c
index deae519bdeecd..67b5ab2657b7c 100644
--- a/net/decnet/sysctl_net_decnet.c
+++ b/net/decnet/sysctl_net_decnet.c
@@ -75,7 +75,7 @@ static void strip_it(char *str)
 		case '\r':
 		case ':':
 			*str = 0;
-			/* Fallthrough */
+			fallthrough;
 		case 0:
 			return;
 		}
diff --git a/net/dsa/slave.c b/net/dsa/slave.c
index 41d60eeefdbd9..9af1a2d0cec4f 100644
--- a/net/dsa/slave.c
+++ b/net/dsa/slave.c
@@ -2009,7 +2009,7 @@ static int dsa_slave_switchdev_event(struct notifier_block *unused,
 	switchdev_work->event = event;
 
 	switch (event) {
-	case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
+	case SWITCHDEV_FDB_ADD_TO_DEVICE:
 	case SWITCHDEV_FDB_DEL_TO_DEVICE:
 		if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
 			goto err_fdb_work_init;
diff --git a/net/ieee802154/6lowpan/reassembly.c b/net/ieee802154/6lowpan/reassembly.c
index bbe9b3b2d3959..be6f06adefe0a 100644
--- a/net/ieee802154/6lowpan/reassembly.c
+++ b/net/ieee802154/6lowpan/reassembly.c
@@ -195,7 +195,7 @@ static int lowpan_frag_rx_handlers_result(struct sk_buff *skb,
 		net_warn_ratelimited("%s: received unknown dispatch\n",
 				     __func__);
 
-		/* fall-through */
+		fallthrough;
 	default:
 		/* all others failure */
 		return NET_RX_DROP;
diff --git a/net/ieee802154/6lowpan/rx.c b/net/ieee802154/6lowpan/rx.c
index b34d050c96871..517e6493f5d14 100644
--- a/net/ieee802154/6lowpan/rx.c
+++ b/net/ieee802154/6lowpan/rx.c
@@ -35,11 +35,11 @@ static int lowpan_rx_handlers_result(struct sk_buff *skb, lowpan_rx_result res)
 		net_warn_ratelimited("%s: received unknown dispatch\n",
 				     __func__);
 
-		/* fall-through */
+		fallthrough;
 	case RX_DROP_UNUSABLE:
 		kfree_skb(skb);
 
-		/* fall-through */
+		fallthrough;
 	case RX_DROP:
 		return NET_RX_DROP;
 	case RX_QUEUED:
diff --git a/net/iucv/af_iucv.c b/net/iucv/af_iucv.c
index 6ee9851ac7c68..a95af62acb529 100644
--- a/net/iucv/af_iucv.c
+++ b/net/iucv/af_iucv.c
@@ -418,7 +418,7 @@ static void iucv_sock_close(struct sock *sk)
 			sk->sk_state = IUCV_DISCONN;
 			sk->sk_state_change(sk);
 		}
-		/* fall through */
+		fallthrough;
 
 	case IUCV_DISCONN:
 		sk->sk_state = IUCV_CLOSING;
@@ -433,7 +433,7 @@ static void iucv_sock_close(struct sock *sk)
 					iucv_sock_in_state(sk, IUCV_CLOSED, 0),
 					timeo);
 		}
-		/* fall through */
+		fallthrough;
 
 	case IUCV_CLOSING:
 		sk->sk_state = IUCV_CLOSED;
@@ -444,7 +444,7 @@ static void iucv_sock_close(struct sock *sk)
 
 		skb_queue_purge(&iucv->send_skb_q);
 		skb_queue_purge(&iucv->backlog_skb_q);
-		/* fall through */
+		fallthrough;
 
 	default:
 		iucv_sever_path(sk, 1);
@@ -2111,10 +2111,10 @@ static int afiucv_hs_rcv(struct sk_buff *skb, struct net_device *dev,
 			kfree_skb(skb);
 			break;
 		}
-		/* fall through - and receive non-zero length data */
+		fallthrough;	/* and receive non-zero length data */
 	case (AF_IUCV_FLAG_SHT):
 		/* shutdown request */
-		/* fall through - and receive zero length data */
+		fallthrough;	/* and receive zero length data */
 	case 0:
 		/* plain data frame */
 		IUCV_SKB_CB(skb)->class = trans_hdr->iucv_hdr.class;
diff --git a/net/mpls/af_mpls.c b/net/mpls/af_mpls.c
index 6fdd0c9f865a5..f2868a8a50c30 100644
--- a/net/mpls/af_mpls.c
+++ b/net/mpls/af_mpls.c
@@ -1516,7 +1516,7 @@ static void mpls_ifdown(struct net_device *dev, int event)
 			case NETDEV_DOWN:
 			case NETDEV_UNREGISTER:
 				nh_flags |= RTNH_F_DEAD;
-				/* fall through */
+				fallthrough;
 			case NETDEV_CHANGE:
 				nh_flags |= RTNH_F_LINKDOWN;
 				break;
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 1aad411a0e461..49b8150239863 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -193,7 +193,6 @@ static void mptcp_check_data_fin_ack(struct sock *sk)
 			sk->sk_state_change(sk);
 			break;
 		case TCP_CLOSING:
-			fallthrough;
 		case TCP_LAST_ACK:
 			inet_sk_state_store(sk, TCP_CLOSE);
 			sk->sk_state_change(sk);
@@ -1541,7 +1540,7 @@ static void mptcp_subflow_shutdown(struct sock *sk, struct sock *ssk, int how)
 	case TCP_LISTEN:
 		if (!(how & RCV_SHUTDOWN))
 			break;
-		/* fall through */
+		fallthrough;
 	case TCP_SYN_SENT:
 		tcp_disconnect(ssk, O_NONBLOCK);
 		break;
diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c
index 1f387be7827be..f1be3e3f6425e 100644
--- a/net/ncsi/ncsi-manage.c
+++ b/net/ncsi/ncsi-manage.c
@@ -474,7 +474,7 @@ static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
 	switch (nd->state) {
 	case ncsi_dev_state_suspend:
 		nd->state = ncsi_dev_state_suspend_select;
-		/* Fall through */
+		fallthrough;
 	case ncsi_dev_state_suspend_select:
 		ndp->pending_req_num = 1;
 
@@ -1302,7 +1302,7 @@ static void ncsi_probe_channel(struct ncsi_dev_priv *ndp)
 	switch (nd->state) {
 	case ncsi_dev_state_probe:
 		nd->state = ncsi_dev_state_probe_deselect;
-		/* Fall through */
+		fallthrough;
 	case ncsi_dev_state_probe_deselect:
 		ndp->pending_req_num = 8;
 
diff --git a/net/netfilter/ipvs/ip_vs_proto_tcp.c b/net/netfilter/ipvs/ip_vs_proto_tcp.c
index 32b028853a7cf..dc2e7da2742ab 100644
--- a/net/netfilter/ipvs/ip_vs_proto_tcp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_tcp.c
@@ -315,7 +315,7 @@ tcp_csum_check(int af, struct sk_buff *skb, struct ip_vs_protocol *pp)
 	switch (skb->ip_summed) {
 	case CHECKSUM_NONE:
 		skb->csum = skb_checksum(skb, tcphoff, skb->len - tcphoff, 0);
-		/* fall through */
+		fallthrough;
 	case CHECKSUM_COMPLETE:
 #ifdef CONFIG_IP_VS_IPV6
 		if (af == AF_INET6) {
diff --git a/net/netfilter/ipvs/ip_vs_proto_udp.c b/net/netfilter/ipvs/ip_vs_proto_udp.c
index 153d89647c874..68260d91c9887 100644
--- a/net/netfilter/ipvs/ip_vs_proto_udp.c
+++ b/net/netfilter/ipvs/ip_vs_proto_udp.c
@@ -318,7 +318,7 @@ udp_csum_check(int af, struct sk_buff *skb, struct ip_vs_protocol *pp)
 		case CHECKSUM_NONE:
 			skb->csum = skb_checksum(skb, udphoff,
 						 skb->len - udphoff, 0);
-			/* fall through */
+			fallthrough;
 		case CHECKSUM_COMPLETE:
 #ifdef CONFIG_IP_VS_IPV6
 			if (af == AF_INET6) {
diff --git a/net/netlink/policy.c b/net/netlink/policy.c
index 2b3e26f7496f5..641ffbdd977ab 100644
--- a/net/netlink/policy.c
+++ b/net/netlink/policy.c
@@ -188,7 +188,7 @@ int netlink_policy_dump_write(struct sk_buff *skb, unsigned long _state)
 		goto next;
 	case NLA_NESTED:
 		type = NL_ATTR_TYPE_NESTED;
-		/* fall through */
+		fallthrough;
 	case NLA_NESTED_ARRAY:
 		if (pt->type == NLA_NESTED_ARRAY)
 			type = NL_ATTR_TYPE_NESTED_ARRAY;
diff --git a/net/netrom/nr_in.c b/net/netrom/nr_in.c
index 2bef3779f8935..69e58906c32b1 100644
--- a/net/netrom/nr_in.c
+++ b/net/netrom/nr_in.c
@@ -122,7 +122,7 @@ static int nr_state2_machine(struct sock *sk, struct sk_buff *skb,
 
 	case NR_DISCREQ:
 		nr_write_internal(sk, NR_DISCACK);
-		/* fall through */
+		fallthrough;
 	case NR_DISCACK:
 		nr_disconnect(sk, 0);
 		break;
diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c
index 0891ee02ca4fe..78da5eab252a0 100644
--- a/net/netrom/nr_route.c
+++ b/net/netrom/nr_route.c
@@ -263,7 +263,7 @@ static int __must_check nr_add_node(ax25_address *nr, const char *mnemonic,
 	case 3:
 		re_sort_routes(nr_node, 0, 1);
 		re_sort_routes(nr_node, 1, 2);
-		/* fall through */
+		fallthrough;
 	case 2:
 		re_sort_routes(nr_node, 0, 1);
 	case 1:
@@ -356,7 +356,7 @@ static int nr_del_node(ax25_address *callsign, ax25_address *neighbour, struct n
 				switch (i) {
 				case 0:
 					nr_node->routes[0] = nr_node->routes[1];
-					/* fall through */
+					fallthrough;
 				case 1:
 					nr_node->routes[1] = nr_node->routes[2];
 				case 2:
@@ -479,7 +479,7 @@ static int nr_dec_obs(void)
 				switch (i) {
 				case 0:
 					s->routes[0] = s->routes[1];
-					/* Fallthrough */
+					fallthrough;
 				case 1:
 					s->routes[1] = s->routes[2];
 				case 2:
@@ -526,7 +526,7 @@ void nr_rt_device_down(struct net_device *dev)
 						switch (i) {
 						case 0:
 							t->routes[0] = t->routes[1];
-							/* fall through */
+							fallthrough;
 						case 1:
 							t->routes[1] = t->routes[2];
 						case 2:
diff --git a/net/openvswitch/conntrack.c b/net/openvswitch/conntrack.c
index 98d393e70de32..a3f1204f1ed27 100644
--- a/net/openvswitch/conntrack.c
+++ b/net/openvswitch/conntrack.c
@@ -778,7 +778,7 @@ static int ovs_ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct,
 			}
 		}
 		/* Non-ICMP, fall thru to initialize if needed. */
-		/* fall through */
+		fallthrough;
 	case IP_CT_NEW:
 		/* Seen it before?  This can happen for loopback, retrans,
 		 * or local packets.
@@ -1540,7 +1540,7 @@ static int parse_ct(const struct nlattr *attr, struct ovs_conntrack_info *info,
 		switch (type) {
 		case OVS_CT_ATTR_FORCE_COMMIT:
 			info->force = true;
-			/* fall through. */
+			fallthrough;
 		case OVS_CT_ATTR_COMMIT:
 			info->commit = true;
 			break;
diff --git a/net/openvswitch/flow.c b/net/openvswitch/flow.c
index 03942c30d83e6..b03d142ec82ef 100644
--- a/net/openvswitch/flow.c
+++ b/net/openvswitch/flow.c
@@ -675,7 +675,7 @@ static int key_extract_l3l4(struct sk_buff *skb, struct sw_flow_key *key)
 			case -EINVAL:
 				memset(&key->ip, 0, sizeof(key->ip));
 				memset(&key->ipv6.addr, 0, sizeof(key->ipv6.addr));
-				/* fall-through */
+				fallthrough;
 			case -EPROTO:
 				skb->transport_header = skb->network_header;
 				error = 0;
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 479c257ded733..da8254e680f94 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -4061,7 +4061,7 @@ static int packet_notifier(struct notifier_block *this,
 		case NETDEV_UNREGISTER:
 			if (po->mclist)
 				packet_dev_mclist_delete(dev, &po->mclist);
-			/* fallthrough */
+			fallthrough;
 
 		case NETDEV_DOWN:
 			if (dev->ifindex == po->ifindex) {
diff --git a/net/phonet/pep.c b/net/phonet/pep.c
index e47d09aca4af4..a1525916885ae 100644
--- a/net/phonet/pep.c
+++ b/net/phonet/pep.c
@@ -368,7 +368,7 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
 			err = -EINVAL;
 			goto out;
 		}
-		/* fall through */
+		fallthrough;
 	case PNS_PEP_DISABLE_REQ:
 		atomic_set(&pn->tx_credits, 0);
 		pep_reply(sk, skb, PN_PIPE_NO_ERROR, NULL, 0, GFP_ATOMIC);
@@ -385,7 +385,7 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
 
 	case PNS_PIPE_ALIGNED_DATA:
 		__skb_pull(skb, 1);
-		/* fall through */
+		fallthrough;
 	case PNS_PIPE_DATA:
 		__skb_pull(skb, 3); /* Pipe data header */
 		if (!pn_flow_safe(pn->rx_fc)) {
@@ -417,11 +417,11 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
 		err = pipe_rcv_created(sk, skb);
 		if (err)
 			break;
-		/* fall through */
+		fallthrough;
 	case PNS_PIPE_RESET_IND:
 		if (!pn->init_enable)
 			break;
-		/* fall through */
+		fallthrough;
 	case PNS_PIPE_ENABLED_IND:
 		if (!pn_flow_safe(pn->tx_fc)) {
 			atomic_set(&pn->tx_credits, 1);
@@ -555,7 +555,7 @@ static int pipe_handler_do_rcv(struct sock *sk, struct sk_buff *skb)
 	switch (hdr->message_id) {
 	case PNS_PIPE_ALIGNED_DATA:
 		__skb_pull(skb, 1);
-		/* fall through */
+		fallthrough;
 	case PNS_PIPE_DATA:
 		__skb_pull(skb, 3); /* Pipe data header */
 		if (!pn_flow_safe(pn->rx_fc)) {
diff --git a/net/rds/send.c b/net/rds/send.c
index 9a529a01cdc6a..985d0b7713acc 100644
--- a/net/rds/send.c
+++ b/net/rds/send.c
@@ -934,7 +934,7 @@ static int rds_rm_size(struct msghdr *msg, int num_sgs,
 
 		case RDS_CMSG_ZCOPY_COOKIE:
 			zcopy_cookie = true;
-			/* fall through */
+			fallthrough;
 
 		case RDS_CMSG_RDMA_DEST:
 		case RDS_CMSG_RDMA_MAP:
diff --git a/net/rose/rose_in.c b/net/rose/rose_in.c
index 0d4fab2be82bd..6af786d66b03a 100644
--- a/net/rose/rose_in.c
+++ b/net/rose/rose_in.c
@@ -216,7 +216,7 @@ static int rose_state4_machine(struct sock *sk, struct sk_buff *skb, int framety
 	switch (frametype) {
 	case ROSE_RESET_REQUEST:
 		rose_write_internal(sk, ROSE_RESET_CONFIRMATION);
-		/* fall through */
+		fallthrough;
 	case ROSE_RESET_CONFIRMATION:
 		rose_stop_timer(sk);
 		rose_start_idletimer(sk);
diff --git a/net/rose/rose_route.c b/net/rose/rose_route.c
index 5277631fa14c6..6e35703ff353d 100644
--- a/net/rose/rose_route.c
+++ b/net/rose/rose_route.c
@@ -343,7 +343,7 @@ static int rose_del_node(struct rose_route_struct *rose_route,
 				case 0:
 					rose_node->neighbour[0] =
 						rose_node->neighbour[1];
-					/* fall through */
+					fallthrough;
 				case 1:
 					rose_node->neighbour[1] =
 						rose_node->neighbour[2];
@@ -505,7 +505,7 @@ void rose_rt_device_down(struct net_device *dev)
 				switch (i) {
 				case 0:
 					t->neighbour[0] = t->neighbour[1];
-					/* fall through */
+					fallthrough;
 				case 1:
 					t->neighbour[1] = t->neighbour[2];
 				case 2:
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index e6725a6de015f..186c8a889b164 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -246,7 +246,7 @@ static int rxrpc_listen(struct socket *sock, int backlog)
 			ret = 0;
 			break;
 		}
-		/* Fall through */
+		fallthrough;
 	default:
 		ret = -EBUSY;
 		break;
@@ -545,7 +545,7 @@ static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
 
 		rx->local = local;
 		rx->sk.sk_state = RXRPC_CLIENT_BOUND;
-		/* Fall through */
+		fallthrough;
 
 	case RXRPC_CLIENT_BOUND:
 		if (!m->msg_name &&
@@ -553,7 +553,7 @@ static int rxrpc_sendmsg(struct socket *sock, struct msghdr *m, size_t len)
 			m->msg_name = &rx->connect_srx;
 			m->msg_namelen = sizeof(rx->connect_srx);
 		}
-		/* Fall through */
+		fallthrough;
 	case RXRPC_SERVER_BOUND:
 	case RXRPC_SERVER_LISTENING:
 		ret = rxrpc_do_sendmsg(rx, m, len);
diff --git a/net/rxrpc/call_accept.c b/net/rxrpc/call_accept.c
index 032ed76c0166d..ef160566aa9a1 100644
--- a/net/rxrpc/call_accept.c
+++ b/net/rxrpc/call_accept.c
@@ -622,7 +622,7 @@ int rxrpc_reject_call(struct rxrpc_sock *rx)
 	case RXRPC_CALL_SERVER_ACCEPTING:
 		__rxrpc_abort_call("REJ", call, 1, RX_USER_ABORT, -ECONNABORTED);
 		abort = true;
-		/* fall through */
+		fallthrough;
 	case RXRPC_CALL_COMPLETE:
 		ret = call->error;
 		goto out_discard;
diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c
index f2a1a5dbb5a7b..159e3eda79142 100644
--- a/net/rxrpc/conn_client.c
+++ b/net/rxrpc/conn_client.c
@@ -881,7 +881,7 @@ void rxrpc_disconnect_client_call(struct rxrpc_call *call)
 			conn->cache_state = RXRPC_CONN_CLIENT_ACTIVE;
 			rxrpc_activate_channels_locked(conn);
 		}
-		/* fall through */
+		fallthrough;
 	case RXRPC_CONN_CLIENT_ACTIVE:
 		if (list_empty(&conn->waiting_calls)) {
 			rxrpc_deactivate_one_channel(conn, channel);
diff --git a/net/rxrpc/input.c b/net/rxrpc/input.c
index 767579328a069..fbde8b824e23c 100644
--- a/net/rxrpc/input.c
+++ b/net/rxrpc/input.c
@@ -1084,7 +1084,7 @@ static void rxrpc_input_implicit_end_call(struct rxrpc_sock *rx,
 	switch (READ_ONCE(call->state)) {
 	case RXRPC_CALL_SERVER_AWAIT_ACK:
 		rxrpc_call_completed(call);
-		/* Fall through */
+		fallthrough;
 	case RXRPC_CALL_COMPLETE:
 		break;
 	default:
@@ -1243,12 +1243,12 @@ int rxrpc_input_packet(struct sock *udp_sk, struct sk_buff *skb)
 	case RXRPC_PACKET_TYPE_BUSY:
 		if (rxrpc_to_server(sp))
 			goto discard;
-		/* Fall through */
+		fallthrough;
 	case RXRPC_PACKET_TYPE_ACK:
 	case RXRPC_PACKET_TYPE_ACKALL:
 		if (sp->hdr.callNumber == 0)
 			goto bad_message;
-		/* Fall through */
+		fallthrough;
 	case RXRPC_PACKET_TYPE_ABORT:
 		break;
 
diff --git a/net/rxrpc/local_object.c b/net/rxrpc/local_object.c
index c8b2097f499c0..ede058f9cc15e 100644
--- a/net/rxrpc/local_object.c
+++ b/net/rxrpc/local_object.c
@@ -162,7 +162,7 @@ static int rxrpc_open_socket(struct rxrpc_local *local, struct net *net)
 		/* Fall through and set IPv4 options too otherwise we don't get
 		 * errors from IPv4 packets sent through the IPv6 socket.
 		 */
-		/* Fall through */
+		fallthrough;
 	case AF_INET:
 		/* we want to receive ICMP errors */
 		ip_sock_set_recverr(local->socket->sk);
diff --git a/net/rxrpc/peer_event.c b/net/rxrpc/peer_event.c
index a852f46d5234d..be032850ae8ca 100644
--- a/net/rxrpc/peer_event.c
+++ b/net/rxrpc/peer_event.c
@@ -273,7 +273,7 @@ static void rxrpc_store_error(struct rxrpc_peer *peer,
 	case SO_EE_ORIGIN_ICMP6:
 		if (err == EACCES)
 			err = EHOSTUNREACH;
-		/* Fall through */
+		fallthrough;
 	default:
 		_proto("Rx Received error report { orig=%u }", ee->ee_origin);
 		break;
diff --git a/net/rxrpc/recvmsg.c b/net/rxrpc/recvmsg.c
index efecc5a8f67d7..c4684dde1f160 100644
--- a/net/rxrpc/recvmsg.c
+++ b/net/rxrpc/recvmsg.c
@@ -776,7 +776,7 @@ int rxrpc_kernel_recv_data(struct socket *sock, struct rxrpc_call *call,
 	case RXRPC_ACK_DELAY:
 		if (ret != -EAGAIN)
 			break;
-		/* Fall through */
+		fallthrough;
 	default:
 		rxrpc_send_ack_packet(call, false, NULL);
 	}
diff --git a/net/rxrpc/sendmsg.c b/net/rxrpc/sendmsg.c
index f3f6da6e4ad29..0824e103d037d 100644
--- a/net/rxrpc/sendmsg.c
+++ b/net/rxrpc/sendmsg.c
@@ -241,7 +241,7 @@ static int rxrpc_queue_packet(struct rxrpc_sock *rx, struct rxrpc_call *call,
 			trace_rxrpc_timer(call, rxrpc_timer_init_for_send_reply, now);
 			if (!last)
 				break;
-			/* Fall through */
+			fallthrough;
 		case RXRPC_CALL_SERVER_SEND_REPLY:
 			call->state = RXRPC_CALL_SERVER_AWAIT_ACK;
 			rxrpc_notify_end_tx(rx, call, notify_end_tx);
@@ -721,13 +721,13 @@ int rxrpc_do_sendmsg(struct rxrpc_sock *rx, struct msghdr *msg, size_t len)
 		if (p.call.timeouts.normal > 0 && j == 0)
 			j = 1;
 		WRITE_ONCE(call->next_rx_timo, j);
-		/* Fall through */
+		fallthrough;
 	case 2:
 		j = msecs_to_jiffies(p.call.timeouts.idle);
 		if (p.call.timeouts.idle > 0 && j == 0)
 			j = 1;
 		WRITE_ONCE(call->next_req_timo, j);
-		/* Fall through */
+		fallthrough;
 	case 1:
 		if (p.call.timeouts.hard > 0) {
 			j = msecs_to_jiffies(p.call.timeouts.hard);
diff --git a/net/sched/sch_cake.c b/net/sched/sch_cake.c
index 0618b63f87c41..7d37638ee1c7a 100644
--- a/net/sched/sch_cake.c
+++ b/net/sched/sch_cake.c
@@ -1670,7 +1670,7 @@ static u32 cake_classify(struct Qdisc *sch, struct cake_tin_data **t,
 		case TC_ACT_QUEUED:
 		case TC_ACT_TRAP:
 			*qerr = NET_XMIT_SUCCESS | __NET_XMIT_STOLEN;
-			/* fall through */
+			fallthrough;
 		case TC_ACT_SHOT:
 			return 0;
 		}
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index aea2a982984d0..8a58f42d6d195 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -875,7 +875,7 @@ static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp)
 	case AF_INET:
 		if (!__ipv6_only_sock(sctp_opt2sk(sp)))
 			return 1;
-		/* fallthru */
+		fallthrough;
 	default:
 		return 0;
 	}
diff --git a/net/sctp/outqueue.c b/net/sctp/outqueue.c
index 577e3bc4ee6f1..3fd06a27105dd 100644
--- a/net/sctp/outqueue.c
+++ b/net/sctp/outqueue.c
@@ -912,7 +912,7 @@ static void sctp_outq_flush_ctrl(struct sctp_flush_ctx *ctx)
 		case SCTP_CID_ABORT:
 			if (sctp_test_T_bit(chunk))
 				ctx->packet->vtag = ctx->asoc->c.my_vtag;
-			/* fallthru */
+			fallthrough;
 
 		/* The following chunks are "response" chunks, i.e.
 		 * they are generated in response to something we
@@ -927,7 +927,7 @@ static void sctp_outq_flush_ctrl(struct sctp_flush_ctx *ctx)
 		case SCTP_CID_ECN_CWR:
 		case SCTP_CID_ASCONF_ACK:
 			one_packet = 1;
-			/* Fall through */
+			fallthrough;
 
 		case SCTP_CID_SACK:
 		case SCTP_CID_HEARTBEAT:
@@ -1030,7 +1030,7 @@ static void sctp_outq_flush_data(struct sctp_flush_ctx *ctx,
 		if (!ctx->packet || !ctx->packet->has_cookie_echo)
 			return;
 
-		/* fall through */
+		fallthrough;
 	case SCTP_STATE_ESTABLISHED:
 	case SCTP_STATE_SHUTDOWN_PENDING:
 	case SCTP_STATE_SHUTDOWN_RECEIVED:
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 47910470e5328..c11c24524652c 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -2077,7 +2077,7 @@ static enum sctp_ierror sctp_process_unk_param(
 		break;
 	case SCTP_PARAM_ACTION_DISCARD_ERR:
 		retval =  SCTP_IERROR_ERROR;
-		/* Fall through */
+		fallthrough;
 	case SCTP_PARAM_ACTION_SKIP_ERR:
 		/* Make an ERROR chunk, preparing enough room for
 		 * returning multiple unknown parameters.
diff --git a/net/sctp/sm_sideeffect.c b/net/sctp/sm_sideeffect.c
index 9f36fe911d082..aa821e71f05e7 100644
--- a/net/sctp/sm_sideeffect.c
+++ b/net/sctp/sm_sideeffect.c
@@ -1516,7 +1516,7 @@ static int sctp_cmd_interpreter(enum sctp_event_type event_type,
 
 			if (timer_pending(timer))
 				break;
-			/* fall through */
+			fallthrough;
 
 		case SCTP_CMD_TIMER_START:
 			timer = &asoc->timers[cmd->obj.to];
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index e86620fbd90fd..c669f8bd1eab2 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -4315,7 +4315,7 @@ enum sctp_disposition sctp_sf_eat_auth(struct net *net,
 			sctp_add_cmd_sf(commands, SCTP_CMD_REPLY,
 					SCTP_CHUNK(err_chunk));
 		}
-		/* Fall Through */
+		fallthrough;
 	case SCTP_IERROR_AUTH_BAD_KEYID:
 	case SCTP_IERROR_BAD_SIG:
 		return sctp_sf_pdiscard(net, ep, asoc, type, arg, commands);
diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c
index 290270c821ca4..3b5c374c6d2cf 100644
--- a/net/smc/smc_close.c
+++ b/net/smc/smc_close.c
@@ -372,7 +372,7 @@ static void smc_close_passive_work(struct work_struct *work)
 	case SMC_PEERCLOSEWAIT1:
 		if (rxflags->peer_done_writing)
 			sk->sk_state = SMC_PEERCLOSEWAIT2;
-		/* fall through */
+		fallthrough;
 		/* to check for closing */
 	case SMC_PEERCLOSEWAIT2:
 		if (!smc_cdc_rxed_any_close(conn))
diff --git a/net/sunrpc/auth_gss/gss_krb5_wrap.c b/net/sunrpc/auth_gss/gss_krb5_wrap.c
index 90b8329fef824..8b300b74a7221 100644
--- a/net/sunrpc/auth_gss/gss_krb5_wrap.c
+++ b/net/sunrpc/auth_gss/gss_krb5_wrap.c
@@ -137,7 +137,7 @@ gss_krb5_make_confounder(char *p, u32 conflen)
 	switch (conflen) {
 	case 16:
 		*q++ = i++;
-		/* fall through */
+		fallthrough;
 	case 8:
 		*q++ = i++;
 		break;
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index a91d1cdad9d7e..62e0b6c1e8cf9 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -1702,7 +1702,7 @@ call_reserveresult(struct rpc_task *task)
 	switch (status) {
 	case -ENOMEM:
 		rpc_delay(task, HZ >> 2);
-		/* fall through */
+		fallthrough;
 	case -EAGAIN:	/* woken up; retry */
 		task->tk_action = call_retry_reserve;
 		return;
@@ -1759,13 +1759,13 @@ call_refreshresult(struct rpc_task *task)
 		/* Use rate-limiting and a max number of retries if refresh
 		 * had status 0 but failed to update the cred.
 		 */
-		/* fall through */
+		fallthrough;
 	case -ETIMEDOUT:
 		rpc_delay(task, 3*HZ);
-		/* fall through */
+		fallthrough;
 	case -EAGAIN:
 		status = -EACCES;
-		/* fall through */
+		fallthrough;
 	case -EKEYEXPIRED:
 		if (!task->tk_cred_retry)
 			break;
@@ -2132,7 +2132,7 @@ call_connect_status(struct rpc_task *task)
 			rpc_force_rebind(clnt);
 			goto out_retry;
 		}
-		/* fall through */
+		fallthrough;
 	case -ECONNRESET:
 	case -ECONNABORTED:
 	case -ENETDOWN:
@@ -2146,7 +2146,7 @@ call_connect_status(struct rpc_task *task)
 			break;
 		/* retry with existing socket, after a delay */
 		rpc_delay(task, 3*HZ);
-		/* fall through */
+		fallthrough;
 	case -EADDRINUSE:
 	case -ENOTCONN:
 	case -EAGAIN:
@@ -2228,7 +2228,7 @@ call_transmit_status(struct rpc_task *task)
 		 */
 	case -ENOBUFS:
 		rpc_delay(task, HZ>>2);
-		/* fall through */
+		fallthrough;
 	case -EBADSLT:
 	case -EAGAIN:
 		task->tk_action = call_transmit;
@@ -2247,7 +2247,7 @@ call_transmit_status(struct rpc_task *task)
 			rpc_call_rpcerror(task, task->tk_status);
 			return;
 		}
-		/* fall through */
+		fallthrough;
 	case -ECONNRESET:
 	case -ECONNABORTED:
 	case -EADDRINUSE:
@@ -2313,7 +2313,7 @@ call_bc_transmit_status(struct rpc_task *task)
 		break;
 	case -ENOBUFS:
 		rpc_delay(task, HZ>>2);
-		/* fall through */
+		fallthrough;
 	case -EBADSLT:
 	case -EAGAIN:
 		task->tk_status = 0;
@@ -2380,7 +2380,7 @@ call_status(struct rpc_task *task)
 		 * were a timeout.
 		 */
 		rpc_delay(task, 3*HZ);
-		/* fall through */
+		fallthrough;
 	case -ETIMEDOUT:
 		break;
 	case -ECONNREFUSED:
@@ -2391,7 +2391,7 @@ call_status(struct rpc_task *task)
 		break;
 	case -EADDRINUSE:
 		rpc_delay(task, 3*HZ);
-		/* fall through */
+		fallthrough;
 	case -EPIPE:
 	case -EAGAIN:
 		break;
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 6ba9d58426291..5a8e47bbfb9f4 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -1623,7 +1623,7 @@ void xprt_alloc_slot(struct rpc_xprt *xprt, struct rpc_task *task)
 	case -EAGAIN:
 		xprt_add_backlog(xprt, task);
 		dprintk("RPC:       waiting for request slot\n");
-		/* fall through */
+		fallthrough;
 	default:
 		task->tk_status = -EAGAIN;
 	}
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 75c646743df3e..3f86d039875c9 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -268,7 +268,7 @@ rpcrdma_cm_event_handler(struct rdma_cm_id *id, struct rdma_cm_event *event)
 	case RDMA_CM_EVENT_DEVICE_REMOVAL:
 		pr_info("rpcrdma: removing device %s for %pISpc\n",
 			ep->re_id->device->name, sap);
-		/* fall through */
+		fallthrough;
 	case RDMA_CM_EVENT_ADDR_CHANGE:
 		ep->re_connect_status = -ENODEV;
 		goto disconnected;
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index c57aef8294035..554e1bb4c1c7e 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -885,7 +885,7 @@ static int xs_local_send_request(struct rpc_rqst *req)
 	default:
 		dprintk("RPC:       sendmsg returned unrecognized error %d\n",
 			-status);
-		/* fall through */
+		fallthrough;
 	case -EPIPE:
 		xs_close(xprt);
 		status = -ENOTCONN;
@@ -1436,7 +1436,7 @@ static void xs_tcp_state_change(struct sock *sk)
 		xprt->connect_cookie++;
 		clear_bit(XPRT_CONNECTED, &xprt->state);
 		xs_run_error_worker(transport, XPRT_SOCK_WAKE_DISCONNECT);
-		/* fall through */
+		fallthrough;
 	case TCP_CLOSING:
 		/*
 		 * If the server closed down the connection, make sure that
@@ -2202,7 +2202,7 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
 	switch (ret) {
 	case 0:
 		xs_set_srcport(transport, sock);
-		/* fall through */
+		fallthrough;
 	case -EINPROGRESS:
 		/* SYN_SENT! */
 		if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO)
@@ -2255,7 +2255,7 @@ static void xs_tcp_setup_socket(struct work_struct *work)
 	default:
 		printk("%s: connect returned unhandled error %d\n",
 			__func__, status);
-		/* fall through */
+		fallthrough;
 	case -EADDRNOTAVAIL:
 		/* We're probably in TIME_WAIT. Get rid of existing socket,
 		 * and retry
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c
index 808b147df7d52..6504141104521 100644
--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -652,7 +652,7 @@ static int tipc_l2_device_event(struct notifier_block *nb, unsigned long evt,
 			test_and_set_bit_lock(0, &b->up);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case NETDEV_GOING_DOWN:
 		clear_bit_unlock(0, &b->up);
 		tipc_reset_bearer(net, b);
diff --git a/net/tipc/group.c b/net/tipc/group.c
index 89257e2a980de..588c2d2b0c697 100644
--- a/net/tipc/group.c
+++ b/net/tipc/group.c
@@ -536,7 +536,7 @@ void tipc_group_filter_msg(struct tipc_group *grp, struct sk_buff_head *inputq,
 				update = true;
 				deliver = false;
 			}
-			/* Fall thru */
+			fallthrough;
 		case TIPC_GRP_BCAST_MSG:
 			m->bc_rcv_nxt++;
 			ack = msg_grp_bc_ack_req(hdr);
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 1075781229739..b7362556da95a 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -1239,7 +1239,7 @@ static bool tipc_data_input(struct tipc_link *l, struct sk_buff *skb,
 			skb_queue_tail(mc_inputq, skb);
 			return true;
 		}
-		/* fall through */
+		fallthrough;
 	case CONN_MANAGER:
 		skb_queue_tail(inputq, skb);
 		return true;
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 07419f36116a8..2679e97e03896 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -783,7 +783,7 @@ static __poll_t tipc_poll(struct file *file, struct socket *sock,
 	case TIPC_ESTABLISHED:
 		if (!tsk->cong_link_cnt && !tsk_conn_cong(tsk))
 			revents |= EPOLLOUT;
-		/* fall through */
+		fallthrough;
 	case TIPC_LISTEN:
 	case TIPC_CONNECTING:
 		if (!skb_queue_empty_lockless(&sk->sk_receive_queue))
@@ -2597,7 +2597,7 @@ static int tipc_connect(struct socket *sock, struct sockaddr *dest,
 		 * case is EINPROGRESS, rather than EALREADY.
 		 */
 		res = -EINPROGRESS;
-		/* fall through */
+		fallthrough;
 	case TIPC_CONNECTING:
 		if (!timeout) {
 			if (previous == TIPC_CONNECTING)
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 181ea6fb56a61..92784e51ee7d9 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -837,7 +837,7 @@ static int unix_create(struct net *net, struct socket *sock, int protocol,
 		 */
 	case SOCK_RAW:
 		sock->type = SOCK_DGRAM;
-		/* fall through */
+		fallthrough;
 	case SOCK_DGRAM:
 		sock->ops = &unix_dgram_ops;
 		break;
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index 90f0f82cd9ca7..e97a4f0c32a3b 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -957,7 +957,7 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
 		if (!ht_cap->ht_supported &&
 		    chandef->chan->band != NL80211_BAND_6GHZ)
 			return false;
-		/* fall through */
+		fallthrough;
 	case NL80211_CHAN_WIDTH_20_NOHT:
 		prohibited_flags |= IEEE80211_CHAN_NO_20MHZ;
 		width = 20;
@@ -983,7 +983,7 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
 		if (chandef->chan->band != NL80211_BAND_6GHZ &&
 		    cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
 			return false;
-		/* fall through */
+		fallthrough;
 	case NL80211_CHAN_WIDTH_80:
 		prohibited_flags |= IEEE80211_CHAN_NO_80MHZ;
 		width = 80;
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index a6c61a2e65691..db7333e20dd71 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -941,7 +941,7 @@ void cfg80211_cac_event(struct net_device *netdev,
 		       sizeof(struct cfg80211_chan_def));
 		queue_work(cfg80211_wq, &rdev->propagate_cac_done_wk);
 		cfg80211_sched_dfs_chan_update(rdev);
-		/* fall through */
+		fallthrough;
 	case NL80211_RADAR_CAC_ABORTED:
 		wdev->cac_started = false;
 		break;
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c04fc6cf65838..fde420af3f00d 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2107,7 +2107,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
 		state->split_start++;
 		if (state->split)
 			break;
-		/* fall through */
+		fallthrough;
 	case 1:
 		if (nla_put(msg, NL80211_ATTR_CIPHER_SUITES,
 			    sizeof(u32) * rdev->wiphy.n_cipher_suites,
@@ -2154,7 +2154,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
 		state->split_start++;
 		if (state->split)
 			break;
-		/* fall through */
+		fallthrough;
 	case 2:
 		if (nl80211_put_iftypes(msg, NL80211_ATTR_SUPPORTED_IFTYPES,
 					rdev->wiphy.interface_modes))
@@ -2162,7 +2162,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
 		state->split_start++;
 		if (state->split)
 			break;
-		/* fall through */
+		fallthrough;
 	case 3:
 		nl_bands = nla_nest_start_noflag(msg,
 						 NL80211_ATTR_WIPHY_BANDS);
@@ -2189,7 +2189,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
 				state->chan_start++;
 				if (state->split)
 					break;
-				/* fall through */
+				fallthrough;
 			default:
 				/* add frequencies */
 				nl_freqs = nla_nest_start_noflag(msg,
@@ -2244,7 +2244,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
 			state->split_start++;
 		if (state->split)
 			break;
-		/* fall through */
+		fallthrough;
 	case 4:
 		nl_cmds = nla_nest_start_noflag(msg,
 						NL80211_ATTR_SUPPORTED_COMMANDS);
@@ -2273,7 +2273,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
 		state->split_start++;
 		if (state->split)
 			break;
-		/* fall through */
+		fallthrough;
 	case 5:
 		if (rdev->ops->remain_on_channel &&
 		    (rdev->wiphy.flags & WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL) &&
@@ -2291,7 +2291,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
 		state->split_start++;
 		if (state->split)
 			break;
-		/* fall through */
+		fallthrough;
 	case 6:
 #ifdef CONFIG_PM
 		if (nl80211_send_wowlan(msg, rdev, state->split))
@@ -2302,7 +2302,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
 #else
 		state->split_start++;
 #endif
-		/* fall through */
+		fallthrough;
 	case 7:
 		if (nl80211_put_iftypes(msg, NL80211_ATTR_SOFTWARE_IFTYPES,
 					rdev->wiphy.software_iftypes))
@@ -2315,7 +2315,7 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
 		state->split_start++;
 		if (state->split)
 			break;
-		/* fall through */
+		fallthrough;
 	case 8:
 		if ((rdev->wiphy.flags & WIPHY_FLAG_HAVE_AP_SME) &&
 		    nla_put_u32(msg, NL80211_ATTR_DEVICE_AP_SME,
@@ -5207,7 +5207,7 @@ bool nl80211_put_sta_rate(struct sk_buff *msg, struct rate_info *info, int attr)
 		break;
 	default:
 		WARN_ON(1);
-		/* fall through */
+		fallthrough;
 	case RATE_INFO_BW_20:
 		rate_flg = 0;
 		break;
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index e67a74488bbe0..04f2d198c2154 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1433,7 +1433,7 @@ cfg80211_inform_single_bss_data(struct wiphy *wiphy,
 	switch (ftype) {
 	case CFG80211_BSS_FTYPE_BEACON:
 		ies->from_beacon = true;
-		/* fall through */
+		fallthrough;
 	case CFG80211_BSS_FTYPE_UNKNOWN:
 		rcu_assign_pointer(tmp.pub.beacon_ies, ies);
 		break;
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index 985f3c23f0545..079ce320dc1ed 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -205,7 +205,7 @@ static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 		return err;
 	case CFG80211_CONN_ASSOC_FAILED_TIMEOUT:
 		*treason = NL80211_TIMEOUT_ASSOC;
-		/* fall through */
+		fallthrough;
 	case CFG80211_CONN_ASSOC_FAILED:
 		cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 				     NULL, 0,
@@ -215,7 +215,7 @@ static int cfg80211_conn_do_work(struct wireless_dev *wdev,
 		cfg80211_mlme_deauth(rdev, wdev->netdev, params->bssid,
 				     NULL, 0,
 				     WLAN_REASON_DEAUTH_LEAVING, false);
-		/* fall through */
+		fallthrough;
 	case CFG80211_CONN_ABANDON:
 		/* free directly, disconnected event already sent */
 		cfg80211_sme_free(wdev);
diff --git a/net/wireless/util.c b/net/wireless/util.c
index dfad1c0f57adb..7c5d5365a5eb7 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -198,7 +198,7 @@ static void set_mandatory_flags_band(struct ieee80211_supported_band *sband)
 				sband->bitrates[i].flags |=
 					IEEE80211_RATE_MANDATORY_G;
 				want--;
-				/* fall through */
+				fallthrough;
 			default:
 				sband->bitrates[i].flags |=
 					IEEE80211_RATE_ERP_G;
@@ -1008,7 +1008,7 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 		case NL80211_IFTYPE_STATION:
 			if (dev->ieee80211_ptr->use_4addr)
 				break;
-			/* fall through */
+			fallthrough;
 		case NL80211_IFTYPE_OCB:
 		case NL80211_IFTYPE_P2P_CLIENT:
 		case NL80211_IFTYPE_ADHOC:
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index aa918d7ff6bd0..4d2160c989a3b 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -1334,7 +1334,7 @@ static struct iw_statistics *cfg80211_wireless_stats(struct net_device *dev)
 			wstats.qual.qual = sig + 110;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case CFG80211_SIGNAL_TYPE_UNSPEC:
 		if (sinfo.filled & BIT_ULL(NL80211_STA_INFO_SIGNAL)) {
 			wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED;
@@ -1343,7 +1343,7 @@ static struct iw_statistics *cfg80211_wireless_stats(struct net_device *dev)
 			wstats.qual.qual = sinfo.signal;
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	default:
 		wstats.qual.updated |= IW_QUAL_LEVEL_INVALID;
 		wstats.qual.updated |= IW_QUAL_QUAL_INVALID;
diff --git a/net/x25/x25_facilities.c b/net/x25/x25_facilities.c
index 7fb327632272b..8e1a49b0c0dc5 100644
--- a/net/x25/x25_facilities.c
+++ b/net/x25/x25_facilities.c
@@ -98,7 +98,7 @@ int x25_parse_facilities(struct sk_buff *skb, struct x25_facilities *facilities,
 					*vc_fac_mask |= X25_MASK_REVERSE;
 					break;
 				}
-				/*fall through */
+				fallthrough;
 			case X25_FAC_THROUGHPUT:
 				facilities->throughput = p[1];
 				*vc_fac_mask |= X25_MASK_THROUGHPUT;
diff --git a/net/x25/x25_in.c b/net/x25/x25_in.c
index 4d3bb46aaae0d..e1c4197af468e 100644
--- a/net/x25/x25_in.c
+++ b/net/x25/x25_in.c
@@ -349,7 +349,7 @@ static int x25_state4_machine(struct sock *sk, struct sk_buff *skb, int frametyp
 
 		case X25_RESET_REQUEST:
 			x25_write_internal(sk, X25_RESET_CONFIRMATION);
-			/* fall through */
+			fallthrough;
 		case X25_RESET_CONFIRMATION: {
 			x25_stop_timer(sk);
 			x25->condition = 0x00;
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index d5280fd6f9c12..d622c2548d229 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -3410,7 +3410,7 @@ decode_session6(struct sk_buff *skb, struct flowi *fl, bool reverse)
 		switch (nexthdr) {
 		case NEXTHDR_FRAGMENT:
 			onlyproto = 1;
-			/* fall through */
+			fallthrough;
 		case NEXTHDR_ROUTING:
 		case NEXTHDR_HOP:
 		case NEXTHDR_DEST:
diff --git a/samples/bpf/hbm.c b/samples/bpf/hbm.c
index 7d71537776785..4b22ace52f805 100644
--- a/samples/bpf/hbm.c
+++ b/samples/bpf/hbm.c
@@ -483,7 +483,7 @@ int main(int argc, char **argv)
 					"Option -%c requires an argument.\n\n",
 					optopt);
 		case 'h':
-			// fallthrough
+			fallthrough;
 		default:
 			Usage();
 			return 0;
diff --git a/security/apparmor/domain.c b/security/apparmor/domain.c
index 7b0e13ce7dc7b..f919ebd042fd2 100644
--- a/security/apparmor/domain.c
+++ b/security/apparmor/domain.c
@@ -577,7 +577,7 @@ static struct aa_label *x_to_label(struct aa_profile *profile,
 			stack = NULL;
 			break;
 		}
-		/* fall through - to X_NAME */
+		fallthrough;	/* to X_NAME */
 	case AA_X_NAME:
 		if (xindex & AA_X_CHILD)
 			/* released by caller */
diff --git a/security/apparmor/lib.c b/security/apparmor/lib.c
index 30c246a9d4409..fa49b81eb54ca 100644
--- a/security/apparmor/lib.c
+++ b/security/apparmor/lib.c
@@ -292,13 +292,13 @@ void aa_apply_modes_to_perms(struct aa_profile *profile, struct aa_perms *perms)
 	switch (AUDIT_MODE(profile)) {
 	case AUDIT_ALL:
 		perms->audit = ALL_PERMS_MASK;
-		/* fall through */
+		fallthrough;
 	case AUDIT_NOQUIET:
 		perms->quiet = 0;
 		break;
 	case AUDIT_QUIET:
 		perms->audit = 0;
-		/* fall through */
+		fallthrough;
 	case AUDIT_QUIET_DENIED:
 		perms->quiet = ALL_PERMS_MASK;
 		break;
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c
index 372d163829606..b8848f53c8cc2 100644
--- a/security/integrity/ima/ima_appraise.c
+++ b/security/integrity/ima/ima_appraise.c
@@ -223,7 +223,7 @@ static int xattr_verify(enum ima_hooks func, struct integrity_iint_cache *iint,
 	case IMA_XATTR_DIGEST_NG:
 		/* first byte contains algorithm id */
 		hash_start = 1;
-		/* fall through */
+		fallthrough;
 	case IMA_XATTR_DIGEST:
 		if (iint->flags & IMA_DIGSIG_REQUIRED) {
 			*cause = "IMA-signature-required";
@@ -395,7 +395,7 @@ int ima_appraise_measurement(enum ima_hooks func,
 		/* It's fine not to have xattrs when using a modsig. */
 		if (try_modsig)
 			break;
-		/* fall through */
+		fallthrough;
 	case INTEGRITY_NOLABEL:		/* No security.evm xattr. */
 		cause = "missing-HMAC";
 		goto out;
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index 07f033634b27a..b4de33074b37d 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c
@@ -1279,12 +1279,12 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
 		case Opt_uid_gt:
 		case Opt_euid_gt:
 			entry->uid_op = &uid_gt;
-			/* fall through */
+			fallthrough;
 		case Opt_uid_lt:
 		case Opt_euid_lt:
 			if ((token == Opt_uid_lt) || (token == Opt_euid_lt))
 				entry->uid_op = &uid_lt;
-			/* fall through */
+			fallthrough;
 		case Opt_uid_eq:
 		case Opt_euid_eq:
 			uid_token = (token == Opt_uid_eq) ||
@@ -1313,11 +1313,11 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry)
 			break;
 		case Opt_fowner_gt:
 			entry->fowner_op = &uid_gt;
-			/* fall through */
+			fallthrough;
 		case Opt_fowner_lt:
 			if (token == Opt_fowner_lt)
 				entry->fowner_op = &uid_lt;
-			/* fall through */
+			fallthrough;
 		case Opt_fowner_eq:
 			ima_log_string_op(ab, "fowner", args[0].from,
 					  entry->fowner_op);
diff --git a/security/integrity/ima/ima_template_lib.c b/security/integrity/ima/ima_template_lib.c
index 41a5f435b793f..c022ee9e2a4e6 100644
--- a/security/integrity/ima/ima_template_lib.c
+++ b/security/integrity/ima/ima_template_lib.c
@@ -77,7 +77,7 @@ static void ima_show_template_data_ascii(struct seq_file *m,
 		/* skip ':' and '\0' */
 		buf_ptr += 2;
 		buflen -= buf_ptr - field_data->data;
-		/* fall through */
+		fallthrough;
 	case DATA_FMT_DIGEST:
 	case DATA_FMT_HEX:
 		if (!buflen)
diff --git a/security/keys/process_keys.c b/security/keys/process_keys.c
index 7e0232db1707e..1fe8b934f656f 100644
--- a/security/keys/process_keys.c
+++ b/security/keys/process_keys.c
@@ -465,7 +465,7 @@ key_ref_t search_cred_keyrings_rcu(struct keyring_search_context *ctx)
 		case -EAGAIN: /* no key */
 			if (ret)
 				break;
-			/* fall through */
+			fallthrough;
 		case -ENOKEY: /* negative key */
 			ret = key_ref;
 			break;
@@ -487,7 +487,7 @@ key_ref_t search_cred_keyrings_rcu(struct keyring_search_context *ctx)
 		case -EAGAIN: /* no key */
 			if (ret)
 				break;
-			/* fall through */
+			fallthrough;
 		case -ENOKEY: /* negative key */
 			ret = key_ref;
 			break;
@@ -509,7 +509,7 @@ key_ref_t search_cred_keyrings_rcu(struct keyring_search_context *ctx)
 		case -EAGAIN: /* no key */
 			if (ret)
 				break;
-			/* fall through */
+			fallthrough;
 		case -ENOKEY: /* negative key */
 			ret = key_ref;
 			break;
diff --git a/security/keys/request_key.c b/security/keys/request_key.c
index e1b9f1a80676e..2da4404276f0f 100644
--- a/security/keys/request_key.c
+++ b/security/keys/request_key.c
@@ -295,26 +295,26 @@ static int construct_get_dest_keyring(struct key **_dest_keyring)
 				}
 			}
 
-			/* fall through */
+			fallthrough;
 		case KEY_REQKEY_DEFL_THREAD_KEYRING:
 			dest_keyring = key_get(cred->thread_keyring);
 			if (dest_keyring)
 				break;
 
-			/* fall through */
+			fallthrough;
 		case KEY_REQKEY_DEFL_PROCESS_KEYRING:
 			dest_keyring = key_get(cred->process_keyring);
 			if (dest_keyring)
 				break;
 
-			/* fall through */
+			fallthrough;
 		case KEY_REQKEY_DEFL_SESSION_KEYRING:
 			dest_keyring = key_get(cred->session_keyring);
 
 			if (dest_keyring)
 				break;
 
-			/* fall through */
+			fallthrough;
 		case KEY_REQKEY_DEFL_USER_SESSION_KEYRING:
 			ret = look_up_user_keyrings(NULL, &dest_keyring);
 			if (ret < 0)
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index ca901025802a9..a340986aa92e1 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3606,26 +3606,20 @@ static int selinux_file_ioctl(struct file *file, unsigned int cmd,
 
 	switch (cmd) {
 	case FIONREAD:
-	/* fall through */
 	case FIBMAP:
-	/* fall through */
 	case FIGETBSZ:
-	/* fall through */
 	case FS_IOC_GETFLAGS:
-	/* fall through */
 	case FS_IOC_GETVERSION:
 		error = file_has_perm(cred, file, FILE__GETATTR);
 		break;
 
 	case FS_IOC_SETFLAGS:
-	/* fall through */
 	case FS_IOC_SETVERSION:
 		error = file_has_perm(cred, file, FILE__SETATTR);
 		break;
 
 	/* sys_ioctl() checks */
 	case FIONBIO:
-	/* fall through */
 	case FIOASYNC:
 		error = file_has_perm(cred, file, 0);
 		break;
@@ -3783,7 +3777,7 @@ static int selinux_file_fcntl(struct file *file, unsigned int cmd,
 			err = file_has_perm(cred, file, FILE__WRITE);
 			break;
 		}
-		/* fall through */
+		fallthrough;
 	case F_SETOWN:
 	case F_SETSIG:
 	case F_GETFL:
diff --git a/security/selinux/ss/mls.c b/security/selinux/ss/mls.c
index 408d306895f8f..d338962fb0c48 100644
--- a/security/selinux/ss/mls.c
+++ b/security/selinux/ss/mls.c
@@ -535,7 +535,7 @@ int mls_compute_sid(struct policydb *p,
 						  scontext, tcontext);
 		}
 
-		/* Fallthrough */
+		fallthrough;
 	case AVTAB_CHANGE:
 		if ((tclass == p->process_class) || sock)
 			/* Use the process MLS attributes. */
@@ -546,8 +546,6 @@ int mls_compute_sid(struct policydb *p,
 	case AVTAB_MEMBER:
 		/* Use the process effective MLS attributes. */
 		return mls_context_cpy_low(newcontext, scontext);
-
-	/* fall through */
 	}
 	return -EINVAL;
 }
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 8ffbf951b7ed7..8c0893eb5aa8f 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -3365,7 +3365,7 @@ static void smack_d_instantiate(struct dentry *opt_dentry, struct inode *inode)
 		 * to set mount options simulate setting the
 		 * superblock default.
 		 */
-		/* Fall through */
+		fallthrough;
 	default:
 		/*
 		 * This isn't an understood special case.
diff --git a/security/tomoyo/common.c b/security/tomoyo/common.c
index c16b8c1b03e7d..4bee32bfe16d1 100644
--- a/security/tomoyo/common.c
+++ b/security/tomoyo/common.c
@@ -1240,7 +1240,7 @@ static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
 			tomoyo_set_space(head);
 			tomoyo_set_string(head, cond->transit->name);
 		}
-		/* fall through */
+		fallthrough;
 	case 1:
 		{
 			const u16 condc = cond->condc;
@@ -1345,12 +1345,12 @@ static bool tomoyo_print_condition(struct tomoyo_io_buffer *head,
 			}
 		}
 		head->r.cond_step++;
-		/* fall through */
+		fallthrough;
 	case 2:
 		if (!tomoyo_flush(head))
 			break;
 		head->r.cond_step++;
-		/* fall through */
+		fallthrough;
 	case 3:
 		if (cond->grant_log != TOMOYO_GRANTLOG_AUTO)
 			tomoyo_io_printf(head, " grant_log=%s",
@@ -1639,7 +1639,7 @@ static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
 					tomoyo_set_string(head, tomoyo_dif[i]);
 			head->r.index = 0;
 			head->r.step++;
-			/* fall through */
+			fallthrough;
 		case 1:
 			while (head->r.index < TOMOYO_MAX_ACL_GROUPS) {
 				i = head->r.index++;
@@ -1652,14 +1652,14 @@ static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
 			head->r.index = 0;
 			head->r.step++;
 			tomoyo_set_lf(head);
-			/* fall through */
+			fallthrough;
 		case 2:
 			if (!tomoyo_read_domain2(head, &domain->acl_info_list))
 				return;
 			head->r.step++;
 			if (!tomoyo_set_lf(head))
 				return;
-			/* fall through */
+			fallthrough;
 		case 3:
 			head->r.step = 0;
 			if (head->r.print_this_domain_only)
@@ -2088,7 +2088,7 @@ int tomoyo_supervisor(struct tomoyo_request_info *r, const char *fmt, ...)
 		/* Check max_learning_entry parameter. */
 		if (tomoyo_domain_quota_is_ok(r))
 			break;
-		/* fall through */
+		fallthrough;
 	default:
 		return 0;
 	}
@@ -2710,13 +2710,13 @@ ssize_t tomoyo_write_control(struct tomoyo_io_buffer *head,
 		case TOMOYO_DOMAINPOLICY:
 			if (tomoyo_select_domain(head, cp0))
 				continue;
-			/* fall through */
+			fallthrough;
 		case TOMOYO_EXCEPTIONPOLICY:
 			if (!strcmp(cp0, "select transition_only")) {
 				head->r.print_transition_related_only = true;
 				continue;
 			}
-			/* fall through */
+			fallthrough;
 		default:
 			if (!tomoyo_manager()) {
 				error = -EPERM;
diff --git a/security/tomoyo/file.c b/security/tomoyo/file.c
index 86f7d1b90212a..051f7297877cb 100644
--- a/security/tomoyo/file.c
+++ b/security/tomoyo/file.c
@@ -927,7 +927,7 @@ int tomoyo_path2_perm(const u8 operation, const struct path *path1,
 	case TOMOYO_TYPE_LINK:
 		if (!d_is_dir(path1->dentry))
 			break;
-		/* fall through */
+		fallthrough;
 	case TOMOYO_TYPE_PIVOT_ROOT:
 		tomoyo_add_slash(&buf1);
 		tomoyo_add_slash(&buf2);
diff --git a/sound/ppc/snd_ps3.c b/sound/ppc/snd_ps3.c
index b8161a08f2ca9..58bb49fff1847 100644
--- a/sound/ppc/snd_ps3.c
+++ b/sound/ppc/snd_ps3.c
@@ -227,14 +227,14 @@ static int snd_ps3_program_dma(struct snd_ps3_card_info *card,
 	switch (filltype) {
 	case SND_PS3_DMA_FILLTYPE_SILENT_FIRSTFILL:
 		silent = 1;
-		/* intentionally fall thru */
+		fallthrough;
 	case SND_PS3_DMA_FILLTYPE_FIRSTFILL:
 		ch0_kick_event = PS3_AUDIO_KICK_EVENT_ALWAYS;
 		break;
 
 	case SND_PS3_DMA_FILLTYPE_SILENT_RUNNING:
 		silent = 1;
-		/* intentionally fall thru */
+		fallthrough;
 	case SND_PS3_DMA_FILLTYPE_RUNNING:
 		ch0_kick_event = PS3_AUDIO_KICK_EVENT_SERIALOUT0_EMPTY;
 		break;
diff --git a/sound/soc/atmel/mchp-i2s-mcc.c b/sound/soc/atmel/mchp-i2s-mcc.c
index 3cb63886195ff..04acc18f2d72c 100644
--- a/sound/soc/atmel/mchp-i2s-mcc.c
+++ b/sound/soc/atmel/mchp-i2s-mcc.c
@@ -536,7 +536,7 @@ static int mchp_i2s_mcc_hw_params(struct snd_pcm_substream *substream,
 		/* cpu is BCLK master */
 		mrb |= MCHP_I2SMCC_MRB_CLKSEL_INT;
 		set_divs = 1;
-		/* fall through */
+		fallthrough;
 	case SND_SOC_DAIFMT_CBM_CFM:
 		/* cpu is slave */
 		mra |= MCHP_I2SMCC_MRA_MODE_SLAVE;
diff --git a/sound/soc/codecs/jz4770.c b/sound/soc/codecs/jz4770.c
index c0a28f06b09a7..298689a07168d 100644
--- a/sound/soc/codecs/jz4770.c
+++ b/sound/soc/codecs/jz4770.c
@@ -202,7 +202,7 @@ static int jz4770_codec_set_bias_level(struct snd_soc_component *codec,
 				   REG_CR_VIC_SB_SLEEP, REG_CR_VIC_SB_SLEEP);
 		regmap_update_bits(regmap, JZ4770_CODEC_REG_CR_VIC,
 				   REG_CR_VIC_SB, REG_CR_VIC_SB);
-	/* fall-through */
+		fallthrough;
 	default:
 		break;
 	}
diff --git a/sound/soc/codecs/pcm186x.c b/sound/soc/codecs/pcm186x.c
index f0da55901dcbe..b8845f45549ea 100644
--- a/sound/soc/codecs/pcm186x.c
+++ b/sound/soc/codecs/pcm186x.c
@@ -401,7 +401,7 @@ static int pcm186x_set_fmt(struct snd_soc_dai *dai, unsigned int format)
 		break;
 	case SND_SOC_DAIFMT_DSP_A:
 		priv->tdm_offset += 1;
-		/* fall through */
+		fallthrough;
 		/* DSP_A uses the same basic config as DSP_B
 		 * except we need to shift the TDM output by one BCK cycle
 		 */
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index d8b9c65471420..404be27c15fed 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -898,7 +898,7 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi *ssi, unsigned int fmt)
 					"missing baudclk for master mode\n");
 				return -EINVAL;
 			}
-			/* fall through */
+			fallthrough;
 		case SND_SOC_DAIFMT_CBM_CFS:
 			ssi->i2s_net |= SSI_SCR_I2S_MODE_MASTER;
 			break;
diff --git a/sound/soc/hisilicon/hi6210-i2s.c b/sound/soc/hisilicon/hi6210-i2s.c
index fd5dcd6b9f856..907f5f1f7b445 100644
--- a/sound/soc/hisilicon/hi6210-i2s.c
+++ b/sound/soc/hisilicon/hi6210-i2s.c
@@ -261,13 +261,13 @@ static int hi6210_i2s_hw_params(struct snd_pcm_substream *substream,
 	switch (params_format(params)) {
 	case SNDRV_PCM_FORMAT_U16_LE:
 		signed_data = HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT;
-		/* fall through */
+		fallthrough;
 	case SNDRV_PCM_FORMAT_S16_LE:
 		bits = HII2S_BITS_16;
 		break;
 	case SNDRV_PCM_FORMAT_U24_LE:
 		signed_data = HII2S_I2S_CFG__S2_CODEC_DATA_FORMAT;
-		/* fall through */
+		fallthrough;
 	case SNDRV_PCM_FORMAT_S24_LE:
 		bits = HII2S_BITS_24;
 		break;
diff --git a/sound/soc/intel/baytrail/sst-baytrail-pcm.c b/sound/soc/intel/baytrail/sst-baytrail-pcm.c
index 54a66cc6db890..d2cda33b65d58 100644
--- a/sound/soc/intel/baytrail/sst-baytrail-pcm.c
+++ b/sound/soc/intel/baytrail/sst-baytrail-pcm.c
@@ -181,7 +181,7 @@ static int sst_byt_pcm_trigger(struct snd_soc_component *component,
 		break;
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 		pdata->restore_stream = false;
-		/* fallthrough */
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		sst_byt_stream_pause(byt, pcm_data->stream);
 		break;
diff --git a/sound/soc/intel/boards/bytcht_es8316.c b/sound/soc/intel/boards/bytcht_es8316.c
index 414ae4bb5224a..7ae34b49815c9 100644
--- a/sound/soc/intel/boards/bytcht_es8316.c
+++ b/sound/soc/intel/boards/bytcht_es8316.c
@@ -573,7 +573,7 @@ static int snd_byt_cht_es8316_mc_probe(struct platform_device *pdev)
 			break;
 		default:
 			dev_err(dev, "get speaker GPIO failed: %d\n", ret);
-			/* fall through */
+			fallthrough;
 		case -EPROBE_DEFER:
 			return ret;
 		}
diff --git a/sound/soc/intel/boards/bytcr_rt5651.c b/sound/soc/intel/boards/bytcr_rt5651.c
index 4e2897596cea3..688b5e0a49e32 100644
--- a/sound/soc/intel/boards/bytcr_rt5651.c
+++ b/sound/soc/intel/boards/bytcr_rt5651.c
@@ -1009,7 +1009,7 @@ static int snd_byt_rt5651_mc_probe(struct platform_device *pdev)
 			default:
 				dev_err(&pdev->dev, "Failed to get ext-amp-enable GPIO: %d\n",
 					ret_val);
-				/* fall through */
+				fallthrough;
 			case -EPROBE_DEFER:
 				put_device(codec_dev);
 				return ret_val;
@@ -1029,7 +1029,7 @@ static int snd_byt_rt5651_mc_probe(struct platform_device *pdev)
 			default:
 				dev_err(&pdev->dev, "Failed to get hp-detect GPIO: %d\n",
 					ret_val);
-				/* fall through */
+				fallthrough;
 			case -EPROBE_DEFER:
 				put_device(codec_dev);
 				return ret_val;
diff --git a/sound/soc/intel/skylake/skl-pcm.c b/sound/soc/intel/skylake/skl-pcm.c
index 5dee55e9546bb..bbe8d782e0af6 100644
--- a/sound/soc/intel/skylake/skl-pcm.c
+++ b/sound/soc/intel/skylake/skl-pcm.c
@@ -488,7 +488,7 @@ static int skl_pcm_trigger(struct snd_pcm_substream *substream, int cmd,
 							stream->lpib);
 			snd_hdac_ext_stream_set_lpib(stream, stream->lpib);
 		}
-		/* fall through */
+		fallthrough;
 
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
diff --git a/sound/soc/meson/axg-tdm-interface.c b/sound/soc/meson/axg-tdm-interface.c
index 36df30915378c..c8664ab80d45a 100644
--- a/sound/soc/meson/axg-tdm-interface.c
+++ b/sound/soc/meson/axg-tdm-interface.c
@@ -58,17 +58,17 @@ int axg_tdm_set_tdm_slots(struct snd_soc_dai *dai, u32 *tx_mask,
 	switch (slot_width) {
 	case 0:
 		slot_width = 32;
-		/* Fall-through */
+		fallthrough;
 	case 32:
 		fmt |= SNDRV_PCM_FMTBIT_S32_LE;
-		/* Fall-through */
+		fallthrough;
 	case 24:
 		fmt |= SNDRV_PCM_FMTBIT_S24_LE;
 		fmt |= SNDRV_PCM_FMTBIT_S20_LE;
-		/* Fall-through */
+		fallthrough;
 	case 16:
 		fmt |= SNDRV_PCM_FMTBIT_S16_LE;
-		/* Fall-through */
+		fallthrough;
 	case 8:
 		fmt |= SNDRV_PCM_FMTBIT_S8;
 		break;
@@ -133,7 +133,7 @@ static int axg_tdm_iface_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 	case SND_SOC_DAIFMT_CBS_CFM:
 	case SND_SOC_DAIFMT_CBM_CFS:
 		dev_err(dai->dev, "only CBS_CFS and CBM_CFM are supported\n");
-		/* Fall-through */
+		fallthrough;
 	default:
 		return -EINVAL;
 	}
diff --git a/sound/soc/pxa/pxa-ssp.c b/sound/soc/pxa/pxa-ssp.c
index d1e09ade0190d..c4e7307a44374 100644
--- a/sound/soc/pxa/pxa-ssp.c
+++ b/sound/soc/pxa/pxa-ssp.c
@@ -488,7 +488,7 @@ static int pxa_ssp_configure_dai_fmt(struct ssp_priv *priv)
 
 	case SND_SOC_DAIFMT_DSP_A:
 		sspsp |= SSPSP_FSRT;
-		/* fall through */
+		fallthrough;
 	case SND_SOC_DAIFMT_DSP_B:
 		sscr0 |= SSCR0_MOD | SSCR0_PSP;
 		sscr1 |= SSCR1_TRAIL | SSCR1_RWOT;
diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c
index 1707414cfa921..5adb293d0435d 100644
--- a/sound/soc/rockchip/rockchip_pdm.c
+++ b/sound/soc/rockchip/rockchip_pdm.c
@@ -229,13 +229,13 @@ static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream,
 	switch (params_channels(params)) {
 	case 8:
 		val |= PDM_PATH3_EN;
-		/* fallthrough */
+		fallthrough;
 	case 6:
 		val |= PDM_PATH2_EN;
-		/* fallthrough */
+		fallthrough;
 	case 4:
 		val |= PDM_PATH1_EN;
-		/* fallthrough */
+		fallthrough;
 	case 2:
 		val |= PDM_PATH0_EN;
 		break;
diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index 80ecb5c7fed0c..df53d4ea808fe 100644
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -733,7 +733,7 @@ static int i2s_hw_params(struct snd_pcm_substream *substream,
 	switch (params_channels(params)) {
 	case 6:
 		val |= MOD_DC2_EN;
-		/* Fall through */
+		fallthrough;
 	case 4:
 		val |= MOD_DC1_EN;
 		break;
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 2fe1b2ec7c8fe..663e3839f2519 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -618,7 +618,7 @@ int snd_soc_suspend(struct device *dev)
 						"ASoC: idle_bias_off CODEC on over suspend\n");
 					break;
 				}
-				/* fall through */
+				fallthrough;
 
 			case SND_SOC_BIAS_OFF:
 				snd_soc_component_suspend(component);
diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index cee9986713187..5b60379237bff 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -1057,7 +1057,7 @@ static int soc_tplg_denum_create(struct soc_tplg *tplg, unsigned int count,
 					ec->hdr.name);
 				goto err_denum;
 			}
-			/* fall through */
+			fallthrough;
 		case SND_SOC_TPLG_CTL_ENUM:
 		case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
 		case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
@@ -1445,7 +1445,7 @@ static struct snd_kcontrol_new *soc_tplg_dapm_widget_denum_create(
 					ec->hdr.name);
 				goto err_se;
 			}
-			/* fall through */
+			fallthrough;
 		case SND_SOC_TPLG_CTL_ENUM:
 		case SND_SOC_TPLG_DAPM_CTL_ENUM_DOUBLE:
 		case SND_SOC_TPLG_DAPM_CTL_ENUM_VIRT:
diff --git a/sound/soc/sof/intel/hda-dai.c b/sound/soc/sof/intel/hda-dai.c
index df1c6997cb4e2..c6cb8c212eca5 100644
--- a/sound/soc/sof/intel/hda-dai.c
+++ b/sound/soc/sof/intel/hda-dai.c
@@ -310,7 +310,7 @@ static int hda_link_pcm_trigger(struct snd_pcm_substream *substream,
 			return ret;
 		}
 
-		/* fallthrough */
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_START:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		snd_hdac_ext_link_stream_start(link_dev);
@@ -333,7 +333,7 @@ static int hda_link_pcm_trigger(struct snd_pcm_substream *substream,
 
 		link_dev->link_prepared = 0;
 
-		/* fallthrough */
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		snd_hdac_ext_link_stream_clear(link_dev);
 		break;
diff --git a/sound/soc/sof/pcm.c b/sound/soc/sof/pcm.c
index d730e437e4ba8..71c3f29057a71 100644
--- a/sound/soc/sof/pcm.c
+++ b/sound/soc/sof/pcm.c
@@ -361,7 +361,7 @@ static int sof_pcm_trigger(struct snd_soc_component *component,
 			return ret;
 		}
 
-		/* fallthrough */
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_START:
 		if (spcm->stream[substream->stream].suspend_ignored) {
 			/*
@@ -386,7 +386,7 @@ static int sof_pcm_trigger(struct snd_soc_component *component,
 			spcm->stream[substream->stream].suspend_ignored = true;
 			return 0;
 		}
-		/* fallthrough */
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_STOP:
 		stream.hdr.cmd |= SOF_IPC_STREAM_TRIG_STOP;
 		ipc_first = true;
diff --git a/sound/soc/ti/davinci-i2s.c b/sound/soc/ti/davinci-i2s.c
index d89b5c928c4d7..dd34504c09ba8 100644
--- a/sound/soc/ti/davinci-i2s.c
+++ b/sound/soc/ti/davinci-i2s.c
@@ -289,7 +289,7 @@ static int davinci_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 		 * rate is lowered.
 		 */
 		inv_fs = true;
-		/* fall through */
+		fallthrough;
 	case SND_SOC_DAIFMT_DSP_A:
 		dev->mode = MOD_DSP_A;
 		break;
diff --git a/sound/soc/ti/n810.c b/sound/soc/ti/n810.c
index 2802a33b9c5f1..ed217b34f846a 100644
--- a/sound/soc/ti/n810.c
+++ b/sound/soc/ti/n810.c
@@ -46,7 +46,7 @@ static void n810_ext_control(struct snd_soc_dapm_context *dapm)
 	switch (n810_jack_func) {
 	case N810_JACK_HS:
 		line1l = 1;
-		/* fall through */
+		fallthrough;
 	case N810_JACK_HP:
 		hp = 1;
 		break;
diff --git a/sound/soc/ti/omap-dmic.c b/sound/soc/ti/omap-dmic.c
index 01abf1be5d788..a26588e9c3bc2 100644
--- a/sound/soc/ti/omap-dmic.c
+++ b/sound/soc/ti/omap-dmic.c
@@ -203,10 +203,10 @@ static int omap_dmic_dai_hw_params(struct snd_pcm_substream *substream,
 	switch (channels) {
 	case 6:
 		dmic->ch_enabled |= OMAP_DMIC_UP3_ENABLE;
-		/* fall through */
+		fallthrough;
 	case 4:
 		dmic->ch_enabled |= OMAP_DMIC_UP2_ENABLE;
-		/* fall through */
+		fallthrough;
 	case 2:
 		dmic->ch_enabled |= OMAP_DMIC_UP1_ENABLE;
 		break;
diff --git a/sound/soc/ti/omap-mcpdm.c b/sound/soc/ti/omap-mcpdm.c
index d482b62f314a6..fafb2998ad0df 100644
--- a/sound/soc/ti/omap-mcpdm.c
+++ b/sound/soc/ti/omap-mcpdm.c
@@ -309,19 +309,19 @@ static int omap_mcpdm_dai_hw_params(struct snd_pcm_substream *substream,
 			/* up to 3 channels for capture */
 			return -EINVAL;
 		link_mask |= 1 << 4;
-		/* fall through */
+		fallthrough;
 	case 4:
 		if (stream == SNDRV_PCM_STREAM_CAPTURE)
 			/* up to 3 channels for capture */
 			return -EINVAL;
 		link_mask |= 1 << 3;
-		/* fall through */
+		fallthrough;
 	case 3:
 		link_mask |= 1 << 2;
-		/* fall through */
+		fallthrough;
 	case 2:
 		link_mask |= 1 << 1;
-		/* fall through */
+		fallthrough;
 	case 1:
 		link_mask |= 1 << 0;
 		break;
diff --git a/sound/soc/ti/rx51.c b/sound/soc/ti/rx51.c
index 2176a95201bf8..a2629ccc1dc84 100644
--- a/sound/soc/ti/rx51.c
+++ b/sound/soc/ti/rx51.c
@@ -55,7 +55,7 @@ static void rx51_ext_control(struct snd_soc_dapm_context *dapm)
 		break;
 	case RX51_JACK_HS:
 		hs = 1;
-		/* fall through */
+		fallthrough;
 	case RX51_JACK_HP:
 		hp = 1;
 		break;
diff --git a/sound/soc/zte/zx-i2s.c b/sound/soc/zte/zx-i2s.c
index 568cde64ff8b8..1c1a44e08a676 100644
--- a/sound/soc/zte/zx-i2s.c
+++ b/sound/soc/zte/zx-i2s.c
@@ -294,7 +294,7 @@ static int zx_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 			zx_i2s_rx_dma_en(zx_i2s->reg_base, true);
 		else
 			zx_i2s_tx_dma_en(zx_i2s->reg_base, true);
-	/* fall thru */
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_RESUME:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		if (capture)
@@ -308,7 +308,7 @@ static int zx_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 			zx_i2s_rx_dma_en(zx_i2s->reg_base, false);
 		else
 			zx_i2s_tx_dma_en(zx_i2s->reg_base, false);
-	/* fall thru */
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		if (capture)
diff --git a/sound/soc/zte/zx-spdif.c b/sound/soc/zte/zx-spdif.c
index a3a07c0730e69..b4168bd532b74 100644
--- a/sound/soc/zte/zx-spdif.c
+++ b/sound/soc/zte/zx-spdif.c
@@ -218,7 +218,7 @@ static int zx_spdif_trigger(struct snd_pcm_substream *substream, int cmd,
 		val = readl_relaxed(zx_spdif->reg_base + ZX_FIFOCTRL);
 		val |= ZX_FIFOCTRL_TX_FIFO_RST;
 		writel_relaxed(val, zx_spdif->reg_base + ZX_FIFOCTRL);
-	/* fall thru */
+		fallthrough;
 	case SNDRV_PCM_TRIGGER_RESUME:
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		zx_spdif_cfg_tx(zx_spdif->reg_base, true);
-- 
GitLab


From 2217b982624680d19a80ebb4600d05c8586c4f96 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@gmail.com>
Date: Sat, 8 Aug 2020 11:37:13 -0700
Subject: [PATCH 0530/1341] binfmt_flat: revert "binfmt_flat: don't offset the
 data start"

binfmt_flat loader uses the gap between text and data to store data
segment pointers for the libraries. Even in the absence of shared
libraries it stores at least one pointer to the executable's own data
segment. Text and data can go back to back in the flat binary image and
without offsetting data segment last few instructions in the text
segment may get corrupted by the data segment pointer.

Fix it by reverting commit a2357223c50a ("binfmt_flat: don't offset the
data start").

Cc: stable@vger.kernel.org
Fixes: a2357223c50a ("binfmt_flat: don't offset the data start")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
---
 fs/binfmt_flat.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index f2f9086ebe983..b9c658e0548eb 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -576,7 +576,7 @@ static int load_flat_file(struct linux_binprm *bprm,
 			goto err;
 		}
 
-		len = data_len + extra;
+		len = data_len + extra + MAX_SHARED_LIBS * sizeof(unsigned long);
 		len = PAGE_ALIGN(len);
 		realdatastart = vm_mmap(NULL, 0, len,
 			PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, 0);
@@ -590,7 +590,9 @@ static int load_flat_file(struct linux_binprm *bprm,
 			vm_munmap(textpos, text_len);
 			goto err;
 		}
-		datapos = ALIGN(realdatastart, FLAT_DATA_ALIGN);
+		datapos = ALIGN(realdatastart +
+				MAX_SHARED_LIBS * sizeof(unsigned long),
+				FLAT_DATA_ALIGN);
 
 		pr_debug("Allocated data+bss+stack (%u bytes): %lx\n",
 			 data_len + bss_len + stack_len, datapos);
@@ -620,7 +622,7 @@ static int load_flat_file(struct linux_binprm *bprm,
 		memp_size = len;
 	} else {
 
-		len = text_len + data_len + extra;
+		len = text_len + data_len + extra + MAX_SHARED_LIBS * sizeof(u32);
 		len = PAGE_ALIGN(len);
 		textpos = vm_mmap(NULL, 0, len,
 			PROT_READ | PROT_EXEC | PROT_WRITE, MAP_PRIVATE, 0);
@@ -635,7 +637,9 @@ static int load_flat_file(struct linux_binprm *bprm,
 		}
 
 		realdatastart = textpos + ntohl(hdr->data_start);
-		datapos = ALIGN(realdatastart, FLAT_DATA_ALIGN);
+		datapos = ALIGN(realdatastart +
+				MAX_SHARED_LIBS * sizeof(u32),
+				FLAT_DATA_ALIGN);
 
 		reloc = (__be32 __user *)
 			(datapos + (ntohl(hdr->reloc_start) - text_len));
@@ -652,9 +656,8 @@ static int load_flat_file(struct linux_binprm *bprm,
 					 (text_len + full_data
 						  - sizeof(struct flat_hdr)),
 					 0);
-			if (datapos != realdatastart)
-				memmove((void *)datapos, (void *)realdatastart,
-						full_data);
+			memmove((void *) datapos, (void *) realdatastart,
+					full_data);
 #else
 			/*
 			 * This is used on MMU systems mainly for testing.
@@ -710,7 +713,8 @@ static int load_flat_file(struct linux_binprm *bprm,
 		if (IS_ERR_VALUE(result)) {
 			ret = result;
 			pr_err("Unable to read code+data+bss, errno %d\n", ret);
-			vm_munmap(textpos, text_len + data_len + extra);
+			vm_munmap(textpos, text_len + data_len + extra +
+				MAX_SHARED_LIBS * sizeof(u32));
 			goto err;
 		}
 	}
-- 
GitLab


From 12564485ed8caac3c18572793ec01330792c7191 Mon Sep 17 00:00:00 2001
From: Shawn Anastasio <shawn@anastas.io>
Date: Fri, 21 Aug 2020 13:55:56 -0500
Subject: [PATCH 0531/1341] Revert "powerpc/64s: Remove PROT_SAO support"

This reverts commit 5c9fa16e8abd342ce04dc830c1ebb2a03abf6c05.

Since PROT_SAO can still be useful for certain classes of software,
reintroduce it. Concerns about guest migration for LPARs using SAO
will be addressed next.

Signed-off-by: Shawn Anastasio <shawn@anastas.io>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200821185558.35561-2-shawn@anastas.io
---
 arch/powerpc/include/asm/book3s/64/pgtable.h  |  8 ++--
 arch/powerpc/include/asm/cputable.h           | 10 ++---
 arch/powerpc/include/asm/mman.h               | 26 ++++++++++--
 arch/powerpc/include/asm/nohash/64/pgtable.h  |  2 +
 arch/powerpc/include/uapi/asm/mman.h          |  2 +-
 arch/powerpc/kernel/dt_cpu_ftrs.c             |  2 +-
 arch/powerpc/mm/book3s64/hash_utils.c         |  2 +
 include/linux/mm.h                            |  2 +
 include/trace/events/mmflags.h                |  2 +
 mm/ksm.c                                      |  4 ++
 tools/testing/selftests/powerpc/mm/.gitignore |  1 +
 tools/testing/selftests/powerpc/mm/Makefile   |  4 +-
 tools/testing/selftests/powerpc/mm/prot_sao.c | 42 +++++++++++++++++++
 13 files changed, 90 insertions(+), 17 deletions(-)
 create mode 100644 tools/testing/selftests/powerpc/mm/prot_sao.c

diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 6de56c3b33c42..495fc0ccb4531 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -20,13 +20,9 @@
 #define _PAGE_RW		(_PAGE_READ | _PAGE_WRITE)
 #define _PAGE_RWX		(_PAGE_READ | _PAGE_WRITE | _PAGE_EXEC)
 #define _PAGE_PRIVILEGED	0x00008 /* kernel access only */
-
-#define _PAGE_CACHE_CTL		0x00030 /* Bits for the folowing cache modes */
-			/*	No bits set is normal cacheable memory */
-			/*	0x00010 unused, is SAO bit on radix POWER9 */
+#define _PAGE_SAO		0x00010 /* Strong access order */
 #define _PAGE_NON_IDEMPOTENT	0x00020 /* non idempotent memory */
 #define _PAGE_TOLERANT		0x00030 /* tolerant memory, cache inhibited */
-
 #define _PAGE_DIRTY		0x00080 /* C: page changed */
 #define _PAGE_ACCESSED		0x00100 /* R: page referenced */
 /*
@@ -828,6 +824,8 @@ static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
 	return hash__set_pte_at(mm, addr, ptep, pte, percpu);
 }
 
+#define _PAGE_CACHE_CTL	(_PAGE_SAO | _PAGE_NON_IDEMPOTENT | _PAGE_TOLERANT)
+
 #define pgprot_noncached pgprot_noncached
 static inline pgprot_t pgprot_noncached(pgprot_t prot)
 {
diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
index e005b45810232..32a15dc49e8ca 100644
--- a/arch/powerpc/include/asm/cputable.h
+++ b/arch/powerpc/include/asm/cputable.h
@@ -196,7 +196,7 @@ static inline void cpu_feature_keys_init(void) { }
 #define CPU_FTR_SPURR			LONG_ASM_CONST(0x0000000001000000)
 #define CPU_FTR_DSCR			LONG_ASM_CONST(0x0000000002000000)
 #define CPU_FTR_VSX			LONG_ASM_CONST(0x0000000004000000)
-// Free					LONG_ASM_CONST(0x0000000008000000)
+#define CPU_FTR_SAO			LONG_ASM_CONST(0x0000000008000000)
 #define CPU_FTR_CP_USE_DCBTZ		LONG_ASM_CONST(0x0000000010000000)
 #define CPU_FTR_UNALIGNED_LD_STD	LONG_ASM_CONST(0x0000000020000000)
 #define CPU_FTR_ASYM_SMT		LONG_ASM_CONST(0x0000000040000000)
@@ -441,7 +441,7 @@ static inline void cpu_feature_keys_init(void) { }
 	    CPU_FTR_MMCRA | CPU_FTR_SMT | \
 	    CPU_FTR_COHERENT_ICACHE | \
 	    CPU_FTR_PURR | CPU_FTR_SPURR | CPU_FTR_REAL_LE | \
-	    CPU_FTR_DSCR | CPU_FTR_ASYM_SMT | \
+	    CPU_FTR_DSCR | CPU_FTR_SAO  | CPU_FTR_ASYM_SMT | \
 	    CPU_FTR_STCX_CHECKS_ADDRESS | CPU_FTR_POPCNTB | CPU_FTR_POPCNTD | \
 	    CPU_FTR_CFAR | CPU_FTR_HVMODE | \
 	    CPU_FTR_VMX_COPY | CPU_FTR_HAS_PPR | CPU_FTR_DABRX )
@@ -450,7 +450,7 @@ static inline void cpu_feature_keys_init(void) { }
 	    CPU_FTR_MMCRA | CPU_FTR_SMT | \
 	    CPU_FTR_COHERENT_ICACHE | \
 	    CPU_FTR_PURR | CPU_FTR_SPURR | CPU_FTR_REAL_LE | \
-	    CPU_FTR_DSCR | \
+	    CPU_FTR_DSCR | CPU_FTR_SAO  | \
 	    CPU_FTR_STCX_CHECKS_ADDRESS | CPU_FTR_POPCNTB | CPU_FTR_POPCNTD | \
 	    CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \
 	    CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_DAWR | \
@@ -461,7 +461,7 @@ static inline void cpu_feature_keys_init(void) { }
 	    CPU_FTR_MMCRA | CPU_FTR_SMT | \
 	    CPU_FTR_COHERENT_ICACHE | \
 	    CPU_FTR_PURR | CPU_FTR_SPURR | CPU_FTR_REAL_LE | \
-	    CPU_FTR_DSCR | \
+	    CPU_FTR_DSCR | CPU_FTR_SAO  | \
 	    CPU_FTR_STCX_CHECKS_ADDRESS | CPU_FTR_POPCNTB | CPU_FTR_POPCNTD | \
 	    CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \
 	    CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_ARCH_207S | \
@@ -479,7 +479,7 @@ static inline void cpu_feature_keys_init(void) { }
 	    CPU_FTR_MMCRA | CPU_FTR_SMT | \
 	    CPU_FTR_COHERENT_ICACHE | \
 	    CPU_FTR_PURR | CPU_FTR_SPURR | CPU_FTR_REAL_LE | \
-	    CPU_FTR_DSCR | \
+	    CPU_FTR_DSCR | CPU_FTR_SAO  | \
 	    CPU_FTR_STCX_CHECKS_ADDRESS | CPU_FTR_POPCNTB | CPU_FTR_POPCNTD | \
 	    CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \
 	    CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_ARCH_207S | \
diff --git a/arch/powerpc/include/asm/mman.h b/arch/powerpc/include/asm/mman.h
index 7c07728af300b..4ba303ea27f59 100644
--- a/arch/powerpc/include/asm/mman.h
+++ b/arch/powerpc/include/asm/mman.h
@@ -13,20 +13,38 @@
 #include <linux/pkeys.h>
 #include <asm/cpu_has_feature.h>
 
-#ifdef CONFIG_PPC_MEM_KEYS
 static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot,
 		unsigned long pkey)
 {
-	return pkey_to_vmflag_bits(pkey);
+#ifdef CONFIG_PPC_MEM_KEYS
+	return (((prot & PROT_SAO) ? VM_SAO : 0) | pkey_to_vmflag_bits(pkey));
+#else
+	return ((prot & PROT_SAO) ? VM_SAO : 0);
+#endif
 }
 #define arch_calc_vm_prot_bits(prot, pkey) arch_calc_vm_prot_bits(prot, pkey)
 
 static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
 {
-	return __pgprot(vmflag_to_pte_pkey_bits(vm_flags));
+#ifdef CONFIG_PPC_MEM_KEYS
+	return (vm_flags & VM_SAO) ?
+		__pgprot(_PAGE_SAO | vmflag_to_pte_pkey_bits(vm_flags)) :
+		__pgprot(0 | vmflag_to_pte_pkey_bits(vm_flags));
+#else
+	return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
+#endif
 }
 #define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
-#endif
+
+static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
+{
+	if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
+		return false;
+	if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
+		return false;
+	return true;
+}
+#define arch_validate_prot arch_validate_prot
 
 #endif /* CONFIG_PPC64 */
 #endif	/* _ASM_POWERPC_MMAN_H */
diff --git a/arch/powerpc/include/asm/nohash/64/pgtable.h b/arch/powerpc/include/asm/nohash/64/pgtable.h
index 59ee9fa4ae09d..6cb8aa3571917 100644
--- a/arch/powerpc/include/asm/nohash/64/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/64/pgtable.h
@@ -82,6 +82,8 @@
  */
 #include <asm/nohash/pte-book3e.h>
 
+#define _PAGE_SAO	0
+
 #define PTE_RPN_MASK	(~((1UL << PTE_RPN_SHIFT) - 1))
 
 /*
diff --git a/arch/powerpc/include/uapi/asm/mman.h b/arch/powerpc/include/uapi/asm/mman.h
index 3a700351fecaf..c0c737215b00b 100644
--- a/arch/powerpc/include/uapi/asm/mman.h
+++ b/arch/powerpc/include/uapi/asm/mman.h
@@ -11,7 +11,7 @@
 #include <asm-generic/mman-common.h>
 
 
-#define PROT_SAO	0x10		/* Unsupported since v5.9 */
+#define PROT_SAO	0x10		/* Strong Access Ordering */
 
 #define MAP_RENAME      MAP_ANONYMOUS   /* In SunOS terminology */
 #define MAP_NORESERVE   0x40            /* don't reserve swap pages */
diff --git a/arch/powerpc/kernel/dt_cpu_ftrs.c b/arch/powerpc/kernel/dt_cpu_ftrs.c
index 8dc46f38680b2..f204ad79b6b54 100644
--- a/arch/powerpc/kernel/dt_cpu_ftrs.c
+++ b/arch/powerpc/kernel/dt_cpu_ftrs.c
@@ -653,7 +653,7 @@ static struct dt_cpu_feature_match __initdata
 	{"processor-control-facility-v3", feat_enable_dbell, CPU_FTR_DBELL},
 	{"processor-utilization-of-resources-register", feat_enable_purr, 0},
 	{"no-execute", feat_enable, 0},
-	/* strong-access-ordering is unused */
+	{"strong-access-ordering", feat_enable, CPU_FTR_SAO},
 	{"cache-inhibited-large-page", feat_enable_large_ci, 0},
 	{"coprocessor-icswx", feat_enable, 0},
 	{"hypervisor-virtualization-interrupt", feat_enable_hvi, 0},
diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c
index 890a71c5293ee..c663e7ba801fc 100644
--- a/arch/powerpc/mm/book3s64/hash_utils.c
+++ b/arch/powerpc/mm/book3s64/hash_utils.c
@@ -232,6 +232,8 @@ unsigned long htab_convert_pte_flags(unsigned long pteflags)
 		rflags |= HPTE_R_I;
 	else if ((pteflags & _PAGE_CACHE_CTL) == _PAGE_NON_IDEMPOTENT)
 		rflags |= (HPTE_R_I | HPTE_R_G);
+	else if ((pteflags & _PAGE_CACHE_CTL) == _PAGE_SAO)
+		rflags |= (HPTE_R_W | HPTE_R_I | HPTE_R_M);
 	else
 		/*
 		 * Add memory coherence if cache inhibited is not set
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1983e08f59062..5abe6df4247ec 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -321,6 +321,8 @@ extern unsigned int kobjsize(const void *objp);
 
 #if defined(CONFIG_X86)
 # define VM_PAT		VM_ARCH_1	/* PAT reserves whole VMA at once (x86) */
+#elif defined(CONFIG_PPC)
+# define VM_SAO		VM_ARCH_1	/* Strong Access Ordering (powerpc) */
 #elif defined(CONFIG_PARISC)
 # define VM_GROWSUP	VM_ARCH_1
 #elif defined(CONFIG_IA64)
diff --git a/include/trace/events/mmflags.h b/include/trace/events/mmflags.h
index 939092dbcb8bf..5fb7520343863 100644
--- a/include/trace/events/mmflags.h
+++ b/include/trace/events/mmflags.h
@@ -114,6 +114,8 @@ IF_HAVE_PG_IDLE(PG_idle,		"idle"		)
 
 #if defined(CONFIG_X86)
 #define __VM_ARCH_SPECIFIC_1 {VM_PAT,     "pat"           }
+#elif defined(CONFIG_PPC)
+#define __VM_ARCH_SPECIFIC_1 {VM_SAO,     "sao"           }
 #elif defined(CONFIG_PARISC) || defined(CONFIG_IA64)
 #define __VM_ARCH_SPECIFIC_1 {VM_GROWSUP,	"growsup"	}
 #elif !defined(CONFIG_MMU)
diff --git a/mm/ksm.c b/mm/ksm.c
index 0aa2247bddd76..90a625b02a1d2 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -2453,6 +2453,10 @@ int ksm_madvise(struct vm_area_struct *vma, unsigned long start,
 		if (vma_is_dax(vma))
 			return 0;
 
+#ifdef VM_SAO
+		if (*vm_flags & VM_SAO)
+			return 0;
+#endif
 #ifdef VM_SPARC_ADI
 		if (*vm_flags & VM_SPARC_ADI)
 			return 0;
diff --git a/tools/testing/selftests/powerpc/mm/.gitignore b/tools/testing/selftests/powerpc/mm/.gitignore
index 91c775c23c660..aac4a59f9e281 100644
--- a/tools/testing/selftests/powerpc/mm/.gitignore
+++ b/tools/testing/selftests/powerpc/mm/.gitignore
@@ -2,6 +2,7 @@
 hugetlb_vs_thp_test
 subpage_prot
 tempfile
+prot_sao
 segv_errors
 wild_bctr
 large_vm_fork_separation
diff --git a/tools/testing/selftests/powerpc/mm/Makefile b/tools/testing/selftests/powerpc/mm/Makefile
index 250ce172e0dac..defe488d6bf11 100644
--- a/tools/testing/selftests/powerpc/mm/Makefile
+++ b/tools/testing/selftests/powerpc/mm/Makefile
@@ -2,7 +2,7 @@
 noarg:
 	$(MAKE) -C ../
 
-TEST_GEN_PROGS := hugetlb_vs_thp_test subpage_prot segv_errors wild_bctr \
+TEST_GEN_PROGS := hugetlb_vs_thp_test subpage_prot prot_sao segv_errors wild_bctr \
 		  large_vm_fork_separation bad_accesses pkey_exec_prot \
 		  pkey_siginfo stack_expansion_signal stack_expansion_ldst
 
@@ -14,6 +14,8 @@ include ../../lib.mk
 
 $(TEST_GEN_PROGS): ../harness.c ../utils.c
 
+$(OUTPUT)/prot_sao: ../utils.c
+
 $(OUTPUT)/wild_bctr: CFLAGS += -m64
 $(OUTPUT)/large_vm_fork_separation: CFLAGS += -m64
 $(OUTPUT)/bad_accesses: CFLAGS += -m64
diff --git a/tools/testing/selftests/powerpc/mm/prot_sao.c b/tools/testing/selftests/powerpc/mm/prot_sao.c
new file mode 100644
index 0000000000000..e2eed65b77359
--- /dev/null
+++ b/tools/testing/selftests/powerpc/mm/prot_sao.c
@@ -0,0 +1,42 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2016, Michael Ellerman, IBM Corp.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+
+#include <asm/cputable.h>
+
+#include "utils.h"
+
+#define SIZE (64 * 1024)
+
+int test_prot_sao(void)
+{
+	char *p;
+
+	/* 2.06 or later should support SAO */
+	SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
+
+	/*
+	 * Ensure we can ask for PROT_SAO.
+	 * We can't really verify that it does the right thing, but at least we
+	 * confirm the kernel will accept it.
+	 */
+	p = mmap(NULL, SIZE, PROT_READ | PROT_WRITE | PROT_SAO,
+		 MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
+	FAIL_IF(p == MAP_FAILED);
+
+	/* Write to the mapping, to at least cause a fault */
+	memset(p, 0xaa, SIZE);
+
+	return 0;
+}
+
+int main(void)
+{
+	return test_harness(test_prot_sao, "prot-sao");
+}
-- 
GitLab


From 9b725a90a8f127802e19466d4e336e701bcea0d2 Mon Sep 17 00:00:00 2001
From: Shawn Anastasio <shawn@anastas.io>
Date: Fri, 21 Aug 2020 13:55:57 -0500
Subject: [PATCH 0532/1341] powerpc/64s: Disallow PROT_SAO in LPARs by default

Since migration of guests using SAO to ISA 3.1 hosts may cause issues,
disable PROT_SAO in LPARs by default and introduce a new Kconfig option
PPC_PROT_SAO_LPAR to allow users to enable it if desired.

Signed-off-by: Shawn Anastasio <shawn@anastas.io>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200821185558.35561-3-shawn@anastas.io
---
 arch/powerpc/Kconfig            | 12 ++++++++++++
 arch/powerpc/include/asm/mman.h |  9 +++++++--
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 1f48bbfb3ce99..65bed1fdeaad7 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -860,6 +860,18 @@ config PPC_SUBPAGE_PROT
 
 	  If unsure, say N here.
 
+config PPC_PROT_SAO_LPAR
+	bool "Support PROT_SAO mappings in LPARs"
+	depends on PPC_BOOK3S_64
+	help
+	  This option adds support for PROT_SAO mappings from userspace
+	  inside LPARs on supported CPUs.
+
+	  This may cause issues when performing guest migration from
+	  a CPU that supports SAO to one that does not.
+
+	  If unsure, say N here.
+
 config PPC_COPRO_BASE
 	bool
 
diff --git a/arch/powerpc/include/asm/mman.h b/arch/powerpc/include/asm/mman.h
index 4ba303ea27f59..7cb6d18f5cd6d 100644
--- a/arch/powerpc/include/asm/mman.h
+++ b/arch/powerpc/include/asm/mman.h
@@ -40,8 +40,13 @@ static inline bool arch_validate_prot(unsigned long prot, unsigned long addr)
 {
 	if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
 		return false;
-	if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
-		return false;
+	if (prot & PROT_SAO) {
+		if (!cpu_has_feature(CPU_FTR_SAO))
+			return false;
+		if (firmware_has_feature(FW_FEATURE_LPAR) &&
+		    !IS_ENABLED(CONFIG_PPC_PROT_SAO_LPAR))
+			return false;
+	}
 	return true;
 }
 #define arch_validate_prot arch_validate_prot
-- 
GitLab


From 24ded46f53f954b9cf246c5d4e3770c7a8aa84ce Mon Sep 17 00:00:00 2001
From: Shawn Anastasio <shawn@anastas.io>
Date: Fri, 21 Aug 2020 13:55:58 -0500
Subject: [PATCH 0533/1341] selftests/powerpc: Update PROT_SAO test to skip ISA
 3.1

Since SAO support was removed from ISA 3.1, skip the
prot_sao test if PPC_FEATURE2_ARCH_3_1 is set.

Signed-off-by: Shawn Anastasio <shawn@anastas.io>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200821185558.35561-4-shawn@anastas.io
---
 tools/testing/selftests/powerpc/mm/prot_sao.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/powerpc/mm/prot_sao.c b/tools/testing/selftests/powerpc/mm/prot_sao.c
index e2eed65b77359..e0cf8ebbf8cd5 100644
--- a/tools/testing/selftests/powerpc/mm/prot_sao.c
+++ b/tools/testing/selftests/powerpc/mm/prot_sao.c
@@ -18,8 +18,9 @@ int test_prot_sao(void)
 {
 	char *p;
 
-	/* 2.06 or later should support SAO */
-	SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
+	/* SAO was introduced in 2.06 and removed in 3.1 */
+	SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06) ||
+		have_hwcap2(PPC_FEATURE2_ARCH_3_1));
 
 	/*
 	 * Ensure we can ask for PROT_SAO.
-- 
GitLab


From 1e9eb5c0907600926b81b0ac8317e85f240e8e1c Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Sun, 23 Aug 2020 17:02:23 -0700
Subject: [PATCH 0534/1341] Documentation: sound/cards: fix heading underline
 lengths for https: changes

Fix documentation build warnings for underline length too short,
caused by s/http/https/ and not changing the accompanying underlines.

Documentation/sound/cards/audigy-mixer.rst:335: WARNING: Title underline too short.
US Patents (https://www.uspto.gov/)
----------------------------------

Documentation/sound/cards/sb-live-mixer.rst:340: WARNING: Title underline too short.
US Patents (https://www.uspto.gov/)
----------------------------------

Fixes: 7ed33ea6b4fa ("ALSA: Replace HTTP links with HTTPS ones")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Alexander A. Klimov <grandmaster@al2klimov.de>
Link: https://lore.kernel.org/r/357ee576-32a2-6e2b-1db6-78be39253846@infradead.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 Documentation/sound/cards/audigy-mixer.rst  | 2 +-
 Documentation/sound/cards/sb-live-mixer.rst | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/sound/cards/audigy-mixer.rst b/Documentation/sound/cards/audigy-mixer.rst
index 998f76e19cdd6..f3f4640ee2afc 100644
--- a/Documentation/sound/cards/audigy-mixer.rst
+++ b/Documentation/sound/cards/audigy-mixer.rst
@@ -332,7 +332,7 @@ WO 9901953 (A1)
 
 
 US Patents (https://www.uspto.gov/)
-----------------------------------
+-----------------------------------
 
 US 5925841
 	Digital Sampling Instrument employing cache memory (Jul. 20, 1999)
diff --git a/Documentation/sound/cards/sb-live-mixer.rst b/Documentation/sound/cards/sb-live-mixer.rst
index eccb0f0ffd0ff..2ce41d3822d8b 100644
--- a/Documentation/sound/cards/sb-live-mixer.rst
+++ b/Documentation/sound/cards/sb-live-mixer.rst
@@ -337,7 +337,7 @@ WO 9901953 (A1)
 
 
 US Patents (https://www.uspto.gov/)
-----------------------------------
+-----------------------------------
 
 US 5925841
 	Digital Sampling Instrument employing cache memory (Jul. 20, 1999)
-- 
GitLab


From 65557383191de46611dd3d6b639cbcfbade43c4a Mon Sep 17 00:00:00 2001
From: Wenbin Mei <wenbin.mei@mediatek.com>
Date: Fri, 14 Aug 2020 09:43:44 +0800
Subject: [PATCH 0535/1341] mmc: dt-bindings: Add resets/reset-names for
 Mediatek MMC bindings

Add description for resets/reset-names.

Cc: <stable@vger.kernel.org> # v5.4+
Fixes: 966580ad236e ("mmc: mediatek: add support for MT7622 SoC")
Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Link: https://lore.kernel.org/r/20200814014346.6496-2-wenbin.mei@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 Documentation/devicetree/bindings/mmc/mtk-sd.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.txt b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
index 0c9cf6a8808c1..26a8f320a1563 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.txt
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.txt
@@ -50,6 +50,8 @@ Optional properties:
 		     error caused by stop clock(fifo full)
 		     Valid range = [0:0x7]. if not present, default value is 0.
 		     applied to compatible "mediatek,mt2701-mmc".
+- resets: Phandle and reset specifier pair to softreset line of MSDC IP.
+- reset-names: Should be "hrst".
 
 Examples:
 mmc0: mmc@11230000 {
-- 
GitLab


From 855d388df217989fbf1f18c781ae6490dbb48e86 Mon Sep 17 00:00:00 2001
From: Wenbin Mei <wenbin.mei@mediatek.com>
Date: Fri, 14 Aug 2020 09:43:46 +0800
Subject: [PATCH 0536/1341] mmc: mediatek: add optional module reset property

This patch fixs eMMC-Access on mt7622/Bpi-64.
Before we got these Errors on mounting eMMC ion R64:
[   48.664925] blk_update_request: I/O error, dev mmcblk0, sector 204800 op 0x1:(WRITE)
flags 0x800 phys_seg 1 prio class 0
[   48.676019] Buffer I/O error on dev mmcblk0p1, logical block 0, lost sync page write

This patch adds a optional reset management for msdc.
Sometimes the bootloader does not bring msdc register
to default state, so need reset the msdc controller.

Cc: <stable@vger.kernel.org> # v5.4+
Fixes: 966580ad236e ("mmc: mediatek: add support for MT7622 SoC")
Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Link: https://lore.kernel.org/r/20200814014346.6496-4-wenbin.mei@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/mtk-sd.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index 4e2583f69a631..b0c27944db7f7 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -22,6 +22,7 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/interrupt.h>
+#include <linux/reset.h>
 
 #include <linux/mmc/card.h>
 #include <linux/mmc/core.h>
@@ -419,6 +420,7 @@ struct msdc_host {
 	struct pinctrl_state *pins_uhs;
 	struct delayed_work req_timeout;
 	int irq;		/* host interrupt */
+	struct reset_control *reset;
 
 	struct clk *src_clk;	/* msdc source clock */
 	struct clk *h_clk;      /* msdc h_clk */
@@ -1592,6 +1594,12 @@ static void msdc_init_hw(struct msdc_host *host)
 	u32 val;
 	u32 tune_reg = host->dev_comp->pad_tune_reg;
 
+	if (host->reset) {
+		reset_control_assert(host->reset);
+		usleep_range(10, 50);
+		reset_control_deassert(host->reset);
+	}
+
 	/* Configure to MMC/SD mode, clock free running */
 	sdr_set_bits(host->base + MSDC_CFG, MSDC_CFG_MODE | MSDC_CFG_CKPDN);
 
@@ -2390,6 +2398,11 @@ static int msdc_drv_probe(struct platform_device *pdev)
 	if (IS_ERR(host->src_clk_cg))
 		host->src_clk_cg = NULL;
 
+	host->reset = devm_reset_control_get_optional_exclusive(&pdev->dev,
+								"hrst");
+	if (IS_ERR(host->reset))
+		return PTR_ERR(host->reset);
+
 	host->irq = platform_get_irq(pdev, 0);
 	if (host->irq < 0) {
 		ret = -EINVAL;
-- 
GitLab


From 6ccc48e0eb2f3a5f3bd39954a21317e5f8874726 Mon Sep 17 00:00:00 2001
From: Patrick Riphagen <patrick.riphagen@xsens.com>
Date: Thu, 6 Aug 2020 13:55:47 +0200
Subject: [PATCH 0537/1341] USB: serial: ftdi_sio: add IDs for Xsens Mti USB
 converter

The device added has an FTDI chip inside.
The device is used to connect Xsens USB Motion Trackers.

Cc: stable@vger.kernel.org
Signed-off-by: Patrick Riphagen <patrick.riphagen@xsens.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/serial/ftdi_sio.c     | 1 +
 drivers/usb/serial/ftdi_sio_ids.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 871cdccf3a5f1..9823bb424abd9 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -713,6 +713,7 @@ static const struct usb_device_id id_table_combined[] = {
 	{ USB_DEVICE(XSENS_VID, XSENS_AWINDA_STATION_PID) },
 	{ USB_DEVICE(XSENS_VID, XSENS_CONVERTER_PID) },
 	{ USB_DEVICE(XSENS_VID, XSENS_MTDEVBOARD_PID) },
+	{ USB_DEVICE(XSENS_VID, XSENS_MTIUSBCONVERTER_PID) },
 	{ USB_DEVICE(XSENS_VID, XSENS_MTW_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_OMNI1509) },
 	{ USB_DEVICE(MOBILITY_VID, MOBILITY_USB_SERIAL_PID) },
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index e8373528264c3..b5ca17a5967a0 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -160,6 +160,7 @@
 #define XSENS_AWINDA_DONGLE_PID 0x0102
 #define XSENS_MTW_PID		0x0200	/* Xsens MTw */
 #define XSENS_MTDEVBOARD_PID	0x0300	/* Motion Tracker Development Board */
+#define XSENS_MTIUSBCONVERTER_PID	0x0301	/* MTi USB converter */
 #define XSENS_CONVERTER_PID	0xD00D	/* Xsens USB-serial converter */
 
 /* Xsens devices using FTDI VID */
-- 
GitLab


From f062f025fc3a4fae3e6a50d13fb1fafb11900fa7 Mon Sep 17 00:00:00 2001
From: Ilya Dryomov <idryomov@gmail.com>
Date: Wed, 19 Aug 2020 10:50:08 +0200
Subject: [PATCH 0538/1341] libceph: add __maybe_unused to DEFINE_CEPH_FEATURE

Avoid -Wunused-const-variable warnings for "make W=1".

Reported-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
---
 include/linux/ceph/ceph_features.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/ceph/ceph_features.h b/include/linux/ceph/ceph_features.h
index fcd84e8d88f44..999636d53cf27 100644
--- a/include/linux/ceph/ceph_features.h
+++ b/include/linux/ceph/ceph_features.h
@@ -11,14 +11,14 @@
 #define CEPH_FEATURE_INCARNATION_2 (1ull<<57) // CEPH_FEATURE_SERVER_JEWEL
 
 #define DEFINE_CEPH_FEATURE(bit, incarnation, name)			\
-	static const uint64_t CEPH_FEATURE_##name = (1ULL<<bit);		\
-	static const uint64_t CEPH_FEATUREMASK_##name =			\
+	static const uint64_t __maybe_unused CEPH_FEATURE_##name = (1ULL<<bit);		\
+	static const uint64_t __maybe_unused CEPH_FEATUREMASK_##name =			\
 		(1ULL<<bit | CEPH_FEATURE_INCARNATION_##incarnation);
 
 /* this bit is ignored but still advertised by release *when* */
 #define DEFINE_CEPH_FEATURE_DEPRECATED(bit, incarnation, name, when) \
-	static const uint64_t DEPRECATED_CEPH_FEATURE_##name = (1ULL<<bit); \
-	static const uint64_t DEPRECATED_CEPH_FEATUREMASK_##name =		\
+	static const uint64_t __maybe_unused DEPRECATED_CEPH_FEATURE_##name = (1ULL<<bit);	\
+	static const uint64_t __maybe_unused DEPRECATED_CEPH_FEATUREMASK_##name =		\
 		(1ULL<<bit | CEPH_FEATURE_INCARNATION_##incarnation);
 
 /*
-- 
GitLab


From 1c502821992d505747ee222bd358fee9cd836d18 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Sun, 23 Aug 2020 16:04:11 -0700
Subject: [PATCH 0539/1341] Documentation: fix pm/intel_pstate build warning
 and wording

Fix documentation build warning and sentence wording:

Documentation/admin-guide/pm/intel_pstate.rst:568: WARNING: Unexpected indentation.

Fixes: f473bf398bf1 ("cpufreq: intel_pstate: Allow raw energy performance preference value")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 Documentation/admin-guide/pm/intel_pstate.rst | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/admin-guide/pm/intel_pstate.rst b/Documentation/admin-guide/pm/intel_pstate.rst
index 7adef969ffeef..cdd1a9a7f9a29 100644
--- a/Documentation/admin-guide/pm/intel_pstate.rst
+++ b/Documentation/admin-guide/pm/intel_pstate.rst
@@ -564,8 +564,8 @@ Energy-Performance Preference (EPP) knob (if supported) or its
 Energy-Performance Bias (EPB) knob. It is also possible to write a positive
 integer value between 0 to 255, if the EPP feature is present. If the EPP
 feature is not present, writing integer value to this attribute is not
-supported. In this case, user can use
- "/sys/devices/system/cpu/cpu*/power/energy_perf_bias" interface.
+supported. In this case, user can use the
+"/sys/devices/system/cpu/cpu*/power/energy_perf_bias" interface.
 
 [Note that tasks may by migrated from one CPU to another by the scheduler's
 load-balancing algorithm and if different energy vs performance hints are
-- 
GitLab


From 3cb5fcf1f3a5dfb7bc0305bb15971db04a0e51d4 Mon Sep 17 00:00:00 2001
From: Vladimir Oltean <olteanv@gmail.com>
Date: Sat, 22 Aug 2020 00:37:53 +0300
Subject: [PATCH 0540/1341] MAINTAINERS: add myself as maintainer for
 spi-fsl-dspi driver

Since I've introduced a fairly large diff to this driver since tag v5.4,
I would like to avoid breakage for my use cases by getting a chance to
be copied on newly submitted patches.

Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20200821213753.3143632-1-olteanv@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 MAINTAINERS | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 68f21d46614c4..5a5f3f7d88eef 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6806,6 +6806,14 @@ L:	linuxppc-dev@lists.ozlabs.org
 S:	Maintained
 F:	drivers/dma/fsldma.*
 
+FREESCALE DSPI DRIVER
+M:	Vladimir Oltean <olteanv@gmail.com>
+L:	linux-spi@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/spi/spi-fsl-dspi.txt
+F:	drivers/spi/spi-fsl-dspi.c
+F:	include/linux/spi/spi-fsl-dspi.h
+
 FREESCALE ENETC ETHERNET DRIVERS
 M:	Claudiu Manoil <claudiu.manoil@nxp.com>
 L:	netdev@vger.kernel.org
-- 
GitLab


From 462582b99b6079a6fbcdfc65bac49f5c2a27cfff Mon Sep 17 00:00:00 2001
From: Bob Peterson <rpeterso@redhat.com>
Date: Fri, 21 Aug 2020 08:50:34 -0500
Subject: [PATCH 0541/1341] gfs2: add some much needed cleanup for log flushes
 that fail

When a log flush fails due to io errors, it signals the failure but does
not clean up after itself very well. This is because buffers are added to
the transaction tr_buf and tr_databuf queue, but the io error causes
gfs2_log_flush to bypass the "after_commit" functions responsible for
dequeueing the bd elements. If the bd elements are added to the ail list
before the error, function ail_drain takes care of dequeueing them.
But if they haven't gotten that far, the elements are forgotten and
make the transactions unable to be freed.

This patch introduces new function trans_drain which drains the bd
elements from the transaction so they can be freed properly.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
 fs/gfs2/log.c   | 31 +++++++++++++++++++++++++++++++
 fs/gfs2/trans.c |  1 +
 2 files changed, 32 insertions(+)

diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index a58333e3980df..3763c9ff1406b 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -901,6 +901,36 @@ static void empty_ail1_list(struct gfs2_sbd *sdp)
 	}
 }
 
+/**
+ * drain_bd - drain the buf and databuf queue for a failed transaction
+ * @tr: the transaction to drain
+ *
+ * When this is called, we're taking an error exit for a log write that failed
+ * but since we bypassed the after_commit functions, we need to remove the
+ * items from the buf and databuf queue.
+ */
+static void trans_drain(struct gfs2_trans *tr)
+{
+	struct gfs2_bufdata *bd;
+	struct list_head *head;
+
+	if (!tr)
+		return;
+
+	head = &tr->tr_buf;
+	while (!list_empty(head)) {
+		bd = list_first_entry(head, struct gfs2_bufdata, bd_list);
+		list_del_init(&bd->bd_list);
+		kmem_cache_free(gfs2_bufdata_cachep, bd);
+	}
+	head = &tr->tr_databuf;
+	while (!list_empty(head)) {
+		bd = list_first_entry(head, struct gfs2_bufdata, bd_list);
+		list_del_init(&bd->bd_list);
+		kmem_cache_free(gfs2_bufdata_cachep, bd);
+	}
+}
+
 /**
  * gfs2_log_flush - flush incore transaction(s)
  * @sdp: the filesystem
@@ -1005,6 +1035,7 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl, u32 flags)
 
 out:
 	if (gfs2_withdrawn(sdp)) {
+		trans_drain(tr);
 		/**
 		 * If the tr_list is empty, we're withdrawing during a log
 		 * flush that targets a transaction, but the transaction was
diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index e1c7eb6eb00a4..6d4bf7ea7b3be 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -67,6 +67,7 @@ int gfs2_trans_begin(struct gfs2_sbd *sdp, unsigned int blocks,
 		tr->tr_reserved += gfs2_struct2blk(sdp, revokes);
 	INIT_LIST_HEAD(&tr->tr_databuf);
 	INIT_LIST_HEAD(&tr->tr_buf);
+	INIT_LIST_HEAD(&tr->tr_list);
 	INIT_LIST_HEAD(&tr->tr_ail1_list);
 	INIT_LIST_HEAD(&tr->tr_ail2_list);
 
-- 
GitLab


From 5cbb80d5236b47b149da292b86d5fc99a680894b Mon Sep 17 00:00:00 2001
From: Chris Healy <cphealy@gmail.com>
Date: Sat, 22 Aug 2020 19:25:05 -0700
Subject: [PATCH 0542/1341] ARM: dts: imx7d-zii-rmu2: fix rgmii phy-mode for
 ksz9031 phy

Since commit bcf3440c6dd7 ("net: phy: micrel: add phy-mode support for the
KSZ9031 PHY") the networking is broken on the imx7d-zii-rmu2 board.

The end result is that network receive behaviour is marginal with lots of
RX CRC errors experienced and NFS frequently failing.

Quoting the explanation from Andrew Lunn in commit 0672d22a19244
("ARM: dts: imx: Fix the AR803X phy-mode"):

"The problem here is, all the DTs were broken since day 0. However,
because the PHY driver was also broken, nobody noticed and it
worked. Now that the PHY driver has been fixed, all the bugs in the
DTs now become an issue"

Fix it by switching to phy-mode = "rgmii-id".

Fixes: bcf3440c6dd7 ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY")
Signed-off-by: Chris Healy <cphealy@gmail.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/imx7d-zii-rmu2.dts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx7d-zii-rmu2.dts b/arch/arm/boot/dts/imx7d-zii-rmu2.dts
index e5e20b07f184b..7cb6153fc650b 100644
--- a/arch/arm/boot/dts/imx7d-zii-rmu2.dts
+++ b/arch/arm/boot/dts/imx7d-zii-rmu2.dts
@@ -58,7 +58,7 @@ &fec1 {
 			  <&clks IMX7D_ENET1_TIME_ROOT_CLK>;
 	assigned-clock-parents = <&clks IMX7D_PLL_ENET_MAIN_100M_CLK>;
 	assigned-clock-rates = <0>, <100000000>;
-	phy-mode = "rgmii";
+	phy-mode = "rgmii-id";
 	phy-handle = <&fec1_phy>;
 	status = "okay";
 
-- 
GitLab


From 100e3345c6e719d2291e1efd5de311cc24bb9c0b Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Mon, 24 Aug 2020 13:44:42 +0800
Subject: [PATCH 0543/1341] net: hns: Fix memleak in hns_nic_dev_probe

hns_nic_dev_probe allocates ndev, but not free it on
two error handling paths, which may lead to memleak.

Fixes: 63434888aaf1b ("net: hns: net: hns: enet adds support of acpi")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/hisilicon/hns/hns_enet.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 23f278e46975b..22522f8a52999 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -2282,8 +2282,10 @@ static int hns_nic_dev_probe(struct platform_device *pdev)
 			priv->enet_ver = AE_VERSION_1;
 		else if (acpi_dev_found(hns_enet_acpi_match[1].id))
 			priv->enet_ver = AE_VERSION_2;
-		else
-			return -ENXIO;
+		else {
+			ret = -ENXIO;
+			goto out_read_prop_fail;
+		}
 
 		/* try to find port-idx-in-ae first */
 		ret = acpi_node_get_property_reference(dev->fwnode,
@@ -2299,7 +2301,8 @@ static int hns_nic_dev_probe(struct platform_device *pdev)
 		priv->fwnode = args.fwnode;
 	} else {
 		dev_err(dev, "cannot read cfg data from OF or acpi\n");
-		return -ENXIO;
+		ret = -ENXIO;
+		goto out_read_prop_fail;
 	}
 
 	ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
-- 
GitLab


From 7ef1fc57301f3cef7201497aa27e89ccb91737fe Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Mon, 24 Aug 2020 13:58:31 +0800
Subject: [PATCH 0544/1341] net: systemport: Fix memleak in bcm_sysport_probe

When devm_kcalloc() fails, dev should be freed just
like what we've done in the subsequent error paths.

Fixes: 7b78be48a8eb6 ("net: systemport: Dynamically allocate number of TX rings")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bcmsysport.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bcmsysport.c b/drivers/net/ethernet/broadcom/bcmsysport.c
index dfed9ade6950c..0762d5d1a810e 100644
--- a/drivers/net/ethernet/broadcom/bcmsysport.c
+++ b/drivers/net/ethernet/broadcom/bcmsysport.c
@@ -2491,8 +2491,10 @@ static int bcm_sysport_probe(struct platform_device *pdev)
 	priv->tx_rings = devm_kcalloc(&pdev->dev, txq,
 				      sizeof(struct bcm_sysport_tx_ring),
 				      GFP_KERNEL);
-	if (!priv->tx_rings)
-		return -ENOMEM;
+	if (!priv->tx_rings) {
+		ret = -ENOMEM;
+		goto err_free_netdev;
+	}
 
 	priv->is_lite = params->is_lite;
 	priv->num_rx_desc_words = params->num_rx_desc_words;
-- 
GitLab


From 6b6cf2b5debd42de39afd8ac84b60faeca62cfaf Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@gmail.com>
Date: Tue, 18 Aug 2020 02:50:48 +0300
Subject: [PATCH 0545/1341] mfd: core: Fix double-free in
 mfd_remove_devices_fn()

The pdev.mfd_cell is released by platform_device_release(), which is
invoked by platform_device_unregister(). Hence mfd_remove_devices_fn()
shouldn't release the cell variable. The double-free bug is reported KASAN
during of MFD driver module removal.

Fixes: 466a62d7642f ("mfd: core: Make a best effort attempt to match devices with the correct of_nodes")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/mfd/mfd-core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index c3651f06684fa..c50718e3db58d 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -370,8 +370,6 @@ static int mfd_remove_devices_fn(struct device *dev, void *data)
 	regulator_bulk_unregister_supply_alias(dev, cell->parent_supplies,
 					       cell->num_parent_supplies);
 
-	kfree(cell);
-
 	platform_device_unregister(pdev);
 	return 0;
 }
-- 
GitLab


From 3622adb02623cde94ea85c68e9a968d0059de545 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Mon, 24 Aug 2020 13:46:22 +0200
Subject: [PATCH 0546/1341] ipv6: ndisc: adjust ndisc_ifinfo_sysctl_change
 prototype

Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ndisc_ifinfo_sysctl_change to take a kernel pointer. Adjust its
prototype in net/ndisc.h as well to fix the following sparse warning:

net/ipv6/ndisc.c:1838:5: error: symbol 'ndisc_ifinfo_sysctl_change' redeclared with different type (incompatible argument 3 (different address spaces)):
net/ipv6/ndisc.c:1838:5:    int extern [addressable] [signed] [toplevel] ndisc_ifinfo_sysctl_change( ... )
net/ipv6/ndisc.c: note: in included file (through include/net/ipv6.h):
./include/net/ndisc.h:496:5: note: previously declared as:
./include/net/ndisc.h:496:5:    int extern [addressable] [signed] [toplevel] ndisc_ifinfo_sysctl_change( ... )
net/ipv6/ndisc.c: note: in included file (through include/net/ip6_route.h):

Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/net/ndisc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/net/ndisc.h b/include/net/ndisc.h
index 9205a76d967a0..38e4094960cee 100644
--- a/include/net/ndisc.h
+++ b/include/net/ndisc.h
@@ -494,7 +494,7 @@ int igmp6_event_report(struct sk_buff *skb);
 
 #ifdef CONFIG_SYSCTL
 int ndisc_ifinfo_sysctl_change(struct ctl_table *ctl, int write,
-			       void __user *buffer, size_t *lenp, loff_t *ppos);
+			       void *buffer, size_t *lenp, loff_t *ppos);
 int ndisc_ifinfo_sysctl_strategy(struct ctl_table *ctl,
 				 void __user *oldval, size_t __user *oldlenp,
 				 void __user *newval, size_t newlen);
-- 
GitLab


From 90b125f4cd2697f949f5877df723a0b710693dd0 Mon Sep 17 00:00:00 2001
From: Vineeth Pillai <viremana@linux.microsoft.com>
Date: Fri, 21 Aug 2020 15:25:23 +0000
Subject: [PATCH 0547/1341] hv_utils: return error if host timesysnc update is
 stale

If for any reason, host timesync messages were not processed by
the guest, hv_ptp_gettime() returns a stale value and the
caller (clock_gettime, PTP ioctl etc) has no means to know this
now. Return an error so that the caller knows about this.

Signed-off-by: Vineeth Pillai <viremana@linux.microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200821152523.99364-1-viremana@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
---
 drivers/hv/hv_util.c | 46 +++++++++++++++++++++++++++++++++-----------
 1 file changed, 35 insertions(+), 11 deletions(-)

diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index 92ee0fe4c919e..1f86e8d9b018d 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -282,26 +282,52 @@ static struct {
 	spinlock_t			lock;
 } host_ts;
 
-static struct timespec64 hv_get_adj_host_time(void)
+static inline u64 reftime_to_ns(u64 reftime)
 {
-	struct timespec64 ts;
-	u64 newtime, reftime;
+	return (reftime - WLTIMEDELTA) * 100;
+}
+
+/*
+ * Hard coded threshold for host timesync delay: 600 seconds
+ */
+static const u64 HOST_TIMESYNC_DELAY_THRESH = 600 * (u64)NSEC_PER_SEC;
+
+static int hv_get_adj_host_time(struct timespec64 *ts)
+{
+	u64 newtime, reftime, timediff_adj;
 	unsigned long flags;
+	int ret = 0;
 
 	spin_lock_irqsave(&host_ts.lock, flags);
 	reftime = hv_read_reference_counter();
-	newtime = host_ts.host_time + (reftime - host_ts.ref_time);
-	ts = ns_to_timespec64((newtime - WLTIMEDELTA) * 100);
+
+	/*
+	 * We need to let the caller know that last update from host
+	 * is older than the max allowable threshold. clock_gettime()
+	 * and PTP ioctl do not have a documented error that we could
+	 * return for this specific case. Use ESTALE to report this.
+	 */
+	timediff_adj = reftime - host_ts.ref_time;
+	if (timediff_adj * 100 > HOST_TIMESYNC_DELAY_THRESH) {
+		pr_warn_once("TIMESYNC IC: Stale time stamp, %llu nsecs old\n",
+			     (timediff_adj * 100));
+		ret = -ESTALE;
+	}
+
+	newtime = host_ts.host_time + timediff_adj;
+	*ts = ns_to_timespec64(reftime_to_ns(newtime));
 	spin_unlock_irqrestore(&host_ts.lock, flags);
 
-	return ts;
+	return ret;
 }
 
 static void hv_set_host_time(struct work_struct *work)
 {
-	struct timespec64 ts = hv_get_adj_host_time();
 
-	do_settimeofday64(&ts);
+	struct timespec64 ts;
+
+	if (!hv_get_adj_host_time(&ts))
+		do_settimeofday64(&ts);
 }
 
 /*
@@ -622,9 +648,7 @@ static int hv_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
 
 static int hv_ptp_gettime(struct ptp_clock_info *info, struct timespec64 *ts)
 {
-	*ts = hv_get_adj_host_time();
-
-	return 0;
+	return hv_get_adj_host_time(ts);
 }
 
 static struct ptp_clock_info ptp_hyperv_info = {
-- 
GitLab


From b46b4a8a57c377b72a98c7930a9f6969d2d4784e Mon Sep 17 00:00:00 2001
From: Vineeth Pillai <viremana@linux.microsoft.com>
Date: Fri, 21 Aug 2020 15:28:49 +0000
Subject: [PATCH 0548/1341] hv_utils: drain the timesync packets on
 onchannelcallback

There could be instances where a system stall prevents the timesync
packets to be consumed. And this might lead to more than one packet
pending in the ring buffer. Current code empties one packet per callback
and it might be a stale one. So drain all the packets from ring buffer
on each callback.

Signed-off-by: Vineeth Pillai <viremana@linux.microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200821152849.99517-1-viremana@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
---
 drivers/hv/hv_util.c | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index 1f86e8d9b018d..a4e8d96513c22 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -387,10 +387,23 @@ static void timesync_onchannelcallback(void *context)
 	struct ictimesync_ref_data *refdata;
 	u8 *time_txf_buf = util_timesynch.recv_buffer;
 
-	vmbus_recvpacket(channel, time_txf_buf,
-			 HV_HYP_PAGE_SIZE, &recvlen, &requestid);
+	/*
+	 * Drain the ring buffer and use the last packet to update
+	 * host_ts
+	 */
+	while (1) {
+		int ret = vmbus_recvpacket(channel, time_txf_buf,
+					   HV_HYP_PAGE_SIZE, &recvlen,
+					   &requestid);
+		if (ret) {
+			pr_warn_once("TimeSync IC pkt recv failed (Err: %d)\n",
+				     ret);
+			break;
+		}
+
+		if (!recvlen)
+			break;
 
-	if (recvlen > 0) {
 		icmsghdrp = (struct icmsg_hdr *)&time_txf_buf[
 				sizeof(struct vmbuspipe_hdr)];
 
-- 
GitLab


From 2c5bf028ef34745e7b3fe768f9c9355ecc7df101 Mon Sep 17 00:00:00 2001
From: Christian Gmeiner <christian.gmeiner@gmail.com>
Date: Sun, 23 Aug 2020 21:09:22 +0200
Subject: [PATCH 0549/1341] drm/etnaviv: fix external abort seen on GC600 rev
 0x19

It looks like that this GPU core triggers an abort when
reading VIVS_HI_CHIP_PRODUCT_ID and/or VIVS_HI_CHIP_ECO_ID.

I looked at different versions of Vivante's kernel driver and did
not found anything about this issue or what feature flag can be
used. So go the simplest route and do not read these two registers
on the affected GPU core.

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reported-by: Josua Mayer <josua.mayer@jm0.eu>
Fixes: 815e45bbd4d3 ("drm/etnaviv: determine product, customer and eco id")
Cc: stable@vger.kernel.org
Tested-by: Josua Mayer <josua.mayer@jm0.eu>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index d5a4cd85a0f6d..c6404b8d067f1 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -337,9 +337,16 @@ static void etnaviv_hw_identify(struct etnaviv_gpu *gpu)
 
 		gpu->identity.model = gpu_read(gpu, VIVS_HI_CHIP_MODEL);
 		gpu->identity.revision = gpu_read(gpu, VIVS_HI_CHIP_REV);
-		gpu->identity.product_id = gpu_read(gpu, VIVS_HI_CHIP_PRODUCT_ID);
 		gpu->identity.customer_id = gpu_read(gpu, VIVS_HI_CHIP_CUSTOMER_ID);
-		gpu->identity.eco_id = gpu_read(gpu, VIVS_HI_CHIP_ECO_ID);
+
+		/*
+		 * Reading these two registers on GC600 rev 0x19 result in a
+		 * unhandled fault: external abort on non-linefetch
+		 */
+		if (!etnaviv_is_model_rev(gpu, GC600, 0x19)) {
+			gpu->identity.product_id = gpu_read(gpu, VIVS_HI_CHIP_PRODUCT_ID);
+			gpu->identity.eco_id = gpu_read(gpu, VIVS_HI_CHIP_ECO_ID);
+		}
 
 		/*
 		 * !!!! HACK ALERT !!!!
-- 
GitLab


From 50248a3ec0f5e5debd18033eb2a29f0b793a7000 Mon Sep 17 00:00:00 2001
From: Lucas Stach <l.stach@pengutronix.de>
Date: Mon, 24 Aug 2020 12:55:37 +0200
Subject: [PATCH 0550/1341] drm/etnaviv: always start/stop scheduler in timeout
 processing

The drm scheduler currently expects that the stop/start sequence is always
executed in the timeout handling, as the job at the head of the hardware
execution list is always removed from the ring mirror before the driver
function is called and only inserted back into the list when starting the
scheduler.

This adds some unnecessary overhead if the timeout handler determines
that the GPU is still executing jobs normally and just wished to extend
the timeout, but a better solution requires a major rearchitecture of the
scheduler, which is not applicable as a fix.

Fixes: 135517d3565b ("drm/scheduler: Avoid accessing freed bad job.")
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Russell King <rmk+kernel@armlinux.org.uk>
---
 drivers/gpu/drm/etnaviv/etnaviv_sched.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
index 4e3e95dce6d87..cd46c882269cc 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
@@ -89,12 +89,15 @@ static void etnaviv_sched_timedout_job(struct drm_sched_job *sched_job)
 	u32 dma_addr;
 	int change;
 
+	/* block scheduler */
+	drm_sched_stop(&gpu->sched, sched_job);
+
 	/*
 	 * If the GPU managed to complete this jobs fence, the timout is
 	 * spurious. Bail out.
 	 */
 	if (dma_fence_is_signaled(submit->out_fence))
-		return;
+		goto out_no_timeout;
 
 	/*
 	 * If the GPU is still making forward progress on the front-end (which
@@ -105,12 +108,9 @@ static void etnaviv_sched_timedout_job(struct drm_sched_job *sched_job)
 	change = dma_addr - gpu->hangcheck_dma_addr;
 	if (change < 0 || change > 16) {
 		gpu->hangcheck_dma_addr = dma_addr;
-		return;
+		goto out_no_timeout;
 	}
 
-	/* block scheduler */
-	drm_sched_stop(&gpu->sched, sched_job);
-
 	if(sched_job)
 		drm_sched_increase_karma(sched_job);
 
@@ -120,6 +120,7 @@ static void etnaviv_sched_timedout_job(struct drm_sched_job *sched_job)
 
 	drm_sched_resubmit_jobs(&gpu->sched);
 
+out_no_timeout:
 	/* restart scheduler after GPU is usable again */
 	drm_sched_start(&gpu->sched, true);
 }
-- 
GitLab


From ebce3eb2f7ef9f6ef01a60874ebd232450107c9a Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@kernel.org>
Date: Tue, 18 Aug 2020 08:03:48 -0400
Subject: [PATCH 0551/1341] ceph: fix inode number handling on arches with
 32-bit ino_t

Tuan and Ulrich mentioned that they were hitting a problem on s390x,
which has a 32-bit ino_t value, even though it's a 64-bit arch (for
historical reasons).

I think the current handling of inode numbers in the ceph driver is
wrong. It tries to use 32-bit inode numbers on 32-bit arches, but that's
actually not a problem. 32-bit arches can deal with 64-bit inode numbers
just fine when userland code is compiled with LFS support (the common
case these days).

What we really want to do is just use 64-bit numbers everywhere, unless
someone has mounted with the ino32 mount option. In that case, we want
to ensure that we hash the inode number down to something that will fit
in 32 bits before presenting the value to userland.

Add new helper functions that do this, and only do the conversion before
presenting these values to userland in getattr and readdir.

The inode table hashvalue is changed to just cast the inode number to
unsigned long, as low-order bits are the most likely to vary anyway.

While it's not strictly required, we do want to put something in
inode->i_ino. Instead of basing it on BITS_PER_LONG, however, base it on
the size of the ino_t type.

NOTE: This is a user-visible change on 32-bit arches:

1/ inode numbers will be seen to have changed between kernel versions.
   32-bit arches will see large inode numbers now instead of the hashed
   ones they saw before.

2/ any really old software not built with LFS support may start failing
   stat() calls with -EOVERFLOW on inode numbers >2^32. Nothing much we
   can do about these, but hopefully the intersection of people running
   such code on ceph will be very small.

The workaround for both problems is to mount with "-o ino32".

[ idryomov: changelog tweak ]

URL: https://tracker.ceph.com/issues/46828
Reported-by: Ulrich Weigand <Ulrich.Weigand@de.ibm.com>
Reported-and-Tested-by: Tuan Hoang1 <Tuan.Hoang1@ibm.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
 fs/ceph/caps.c       | 14 ++++-----
 fs/ceph/debugfs.c    |  4 +--
 fs/ceph/dir.c        | 31 ++++++++-----------
 fs/ceph/file.c       |  4 +--
 fs/ceph/inode.c      | 19 ++++++------
 fs/ceph/mds_client.h |  2 +-
 fs/ceph/quota.c      |  4 +--
 fs/ceph/super.h      | 73 +++++++++++++++++++++++---------------------
 8 files changed, 74 insertions(+), 77 deletions(-)

diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index 55ccccf77ceab..034b3f4fdd3a7 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -887,8 +887,8 @@ int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch)
 	int have = ci->i_snap_caps;
 
 	if ((have & mask) == mask) {
-		dout("__ceph_caps_issued_mask ino 0x%lx snap issued %s"
-		     " (mask %s)\n", ci->vfs_inode.i_ino,
+		dout("__ceph_caps_issued_mask ino 0x%llx snap issued %s"
+		     " (mask %s)\n", ceph_ino(&ci->vfs_inode),
 		     ceph_cap_string(have),
 		     ceph_cap_string(mask));
 		return 1;
@@ -899,8 +899,8 @@ int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch)
 		if (!__cap_is_valid(cap))
 			continue;
 		if ((cap->issued & mask) == mask) {
-			dout("__ceph_caps_issued_mask ino 0x%lx cap %p issued %s"
-			     " (mask %s)\n", ci->vfs_inode.i_ino, cap,
+			dout("__ceph_caps_issued_mask ino 0x%llx cap %p issued %s"
+			     " (mask %s)\n", ceph_ino(&ci->vfs_inode), cap,
 			     ceph_cap_string(cap->issued),
 			     ceph_cap_string(mask));
 			if (touch)
@@ -911,8 +911,8 @@ int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch)
 		/* does a combination of caps satisfy mask? */
 		have |= cap->issued;
 		if ((have & mask) == mask) {
-			dout("__ceph_caps_issued_mask ino 0x%lx combo issued %s"
-			     " (mask %s)\n", ci->vfs_inode.i_ino,
+			dout("__ceph_caps_issued_mask ino 0x%llx combo issued %s"
+			     " (mask %s)\n", ceph_ino(&ci->vfs_inode),
 			     ceph_cap_string(cap->issued),
 			     ceph_cap_string(mask));
 			if (touch) {
@@ -2872,7 +2872,7 @@ int ceph_get_caps(struct file *filp, int need, int want,
 			struct cap_wait cw;
 			DEFINE_WAIT_FUNC(wait, woken_wake_function);
 
-			cw.ino = inode->i_ino;
+			cw.ino = ceph_ino(inode);
 			cw.tgid = current->tgid;
 			cw.need = need;
 			cw.want = want;
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 97539b497e4c4..3e3fcda9b276c 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -202,7 +202,7 @@ static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
 {
 	struct seq_file *s = p;
 
-	seq_printf(s, "0x%-17lx%-17s%-17s\n", inode->i_ino,
+	seq_printf(s, "0x%-17llx%-17s%-17s\n", ceph_ino(inode),
 		   ceph_cap_string(cap->issued),
 		   ceph_cap_string(cap->implemented));
 	return 0;
@@ -247,7 +247,7 @@ static int caps_show(struct seq_file *s, void *p)
 
 	spin_lock(&mdsc->caps_list_lock);
 	list_for_each_entry(cw, &mdsc->cap_wait_list, list) {
-		seq_printf(s, "%-13d0x%-17lx%-17s%-17s\n", cw->tgid, cw->ino,
+		seq_printf(s, "%-13d0x%-17llx%-17s%-17s\n", cw->tgid, cw->ino,
 				ceph_cap_string(cw->need),
 				ceph_cap_string(cw->want));
 	}
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 060bdcc5ce32c..040eaad9d0631 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -259,9 +259,7 @@ static int __dcache_readdir(struct file *file,  struct dir_context *ctx,
 			     dentry, dentry, d_inode(dentry));
 			ctx->pos = di->offset;
 			if (!dir_emit(ctx, dentry->d_name.name,
-				      dentry->d_name.len,
-				      ceph_translate_ino(dentry->d_sb,
-							 d_inode(dentry)->i_ino),
+				      dentry->d_name.len, ceph_present_inode(d_inode(dentry)),
 				      d_inode(dentry)->i_mode >> 12)) {
 				dput(dentry);
 				err = 0;
@@ -324,18 +322,21 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
 	/* always start with . and .. */
 	if (ctx->pos == 0) {
 		dout("readdir off 0 -> '.'\n");
-		if (!dir_emit(ctx, ".", 1, 
-			    ceph_translate_ino(inode->i_sb, inode->i_ino),
+		if (!dir_emit(ctx, ".", 1, ceph_present_inode(inode),
 			    inode->i_mode >> 12))
 			return 0;
 		ctx->pos = 1;
 	}
 	if (ctx->pos == 1) {
-		ino_t ino = parent_ino(file->f_path.dentry);
+		u64 ino;
+		struct dentry *dentry = file->f_path.dentry;
+
+		spin_lock(&dentry->d_lock);
+		ino = ceph_present_inode(dentry->d_parent->d_inode);
+		spin_unlock(&dentry->d_lock);
+
 		dout("readdir off 1 -> '..'\n");
-		if (!dir_emit(ctx, "..", 2,
-			    ceph_translate_ino(inode->i_sb, ino),
-			    inode->i_mode >> 12))
+		if (!dir_emit(ctx, "..", 2, ino, inode->i_mode >> 12))
 			return 0;
 		ctx->pos = 2;
 	}
@@ -507,9 +508,6 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
 	}
 	for (; i < rinfo->dir_nr; i++) {
 		struct ceph_mds_reply_dir_entry *rde = rinfo->dir_entries + i;
-		struct ceph_vino vino;
-		ino_t ino;
-		u32 ftype;
 
 		BUG_ON(rde->offset < ctx->pos);
 
@@ -519,13 +517,10 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
 		     rde->name_len, rde->name, &rde->inode.in);
 
 		BUG_ON(!rde->inode.in);
-		ftype = le32_to_cpu(rde->inode.in->mode) >> 12;
-		vino.ino = le64_to_cpu(rde->inode.in->ino);
-		vino.snap = le64_to_cpu(rde->inode.in->snapid);
-		ino = ceph_vino_to_ino(vino);
 
 		if (!dir_emit(ctx, rde->name, rde->name_len,
-			      ceph_translate_ino(inode->i_sb, ino), ftype)) {
+			      ceph_present_ino(inode->i_sb, le64_to_cpu(rde->inode.in->ino)),
+			      le32_to_cpu(rde->inode.in->mode) >> 12)) {
 			dout("filldir stopping us...\n");
 			return 0;
 		}
@@ -1161,7 +1156,7 @@ static int ceph_unlink(struct inode *dir, struct dentry *dentry)
 
 	if (try_async && op == CEPH_MDS_OP_UNLINK &&
 	    (req->r_dir_caps = get_caps_for_async_unlink(dir, dentry))) {
-		dout("async unlink on %lu/%.*s caps=%s", dir->i_ino,
+		dout("async unlink on %llu/%.*s caps=%s", ceph_ino(dir),
 		     dentry->d_name.len, dentry->d_name.name,
 		     ceph_cap_string(req->r_dir_caps));
 		set_bit(CEPH_MDS_R_ASYNC, &req->r_req_flags);
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index d51c3f2fdca02..81d2cc8dbb6d5 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -630,8 +630,8 @@ static int ceph_finish_async_create(struct inode *dir, struct dentry *dentry,
 	} else {
 		struct dentry *dn;
 
-		dout("%s d_adding new inode 0x%llx to 0x%lx/%s\n", __func__,
-			vino.ino, dir->i_ino, dentry->d_name.name);
+		dout("%s d_adding new inode 0x%llx to 0x%llx/%s\n", __func__,
+			vino.ino, ceph_ino(dir), dentry->d_name.name);
 		ceph_dir_clear_ordered(dir);
 		ceph_init_inode_acls(inode, as_ctx);
 		if (inode->i_state & I_NEW) {
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 357c937699d56..d163fa96cb401 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -41,8 +41,10 @@ static void ceph_inode_work(struct work_struct *work);
  */
 static int ceph_set_ino_cb(struct inode *inode, void *data)
 {
-	ceph_inode(inode)->i_vino = *(struct ceph_vino *)data;
-	inode->i_ino = ceph_vino_to_ino(*(struct ceph_vino *)data);
+	struct ceph_inode_info *ci = ceph_inode(inode);
+
+	ci->i_vino = *(struct ceph_vino *)data;
+	inode->i_ino = ceph_vino_to_ino_t(ci->i_vino);
 	inode_set_iversion_raw(inode, 0);
 	return 0;
 }
@@ -50,17 +52,14 @@ static int ceph_set_ino_cb(struct inode *inode, void *data)
 struct inode *ceph_get_inode(struct super_block *sb, struct ceph_vino vino)
 {
 	struct inode *inode;
-	ino_t t = ceph_vino_to_ino(vino);
 
-	inode = iget5_locked(sb, t, ceph_ino_compare, ceph_set_ino_cb, &vino);
+	inode = iget5_locked(sb, (unsigned long)vino.ino, ceph_ino_compare,
+			     ceph_set_ino_cb, &vino);
 	if (!inode)
 		return ERR_PTR(-ENOMEM);
-	if (inode->i_state & I_NEW)
-		dout("get_inode created new inode %p %llx.%llx ino %llx\n",
-		     inode, ceph_vinop(inode), (u64)inode->i_ino);
 
-	dout("get_inode on %lu=%llx.%llx got %p\n", inode->i_ino, vino.ino,
-	     vino.snap, inode);
+	dout("get_inode on %llu=%llx.%llx got %p new %d\n", ceph_present_inode(inode),
+	     ceph_vinop(inode), inode, !!(inode->i_state & I_NEW));
 	return inode;
 }
 
@@ -2378,7 +2377,7 @@ int ceph_getattr(const struct path *path, struct kstat *stat,
 	}
 
 	generic_fillattr(inode, stat);
-	stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
+	stat->ino = ceph_present_inode(inode);
 
 	/*
 	 * btime on newly-allocated inodes is 0, so if this is still set to
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index bc9e95937d7c6..658800605bfb4 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -372,7 +372,7 @@ struct ceph_quotarealm_inode {
 
 struct cap_wait {
 	struct list_head	list;
-	unsigned long		ino;
+	u64			ino;
 	pid_t			tgid;
 	int			need;
 	int			want;
diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c
index 198ddde5c1e6a..cc2c4d40b0222 100644
--- a/fs/ceph/quota.c
+++ b/fs/ceph/quota.c
@@ -23,12 +23,12 @@ static inline bool ceph_has_realms_with_quotas(struct inode *inode)
 {
 	struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
 	struct super_block *sb = mdsc->fsc->sb;
+	struct inode *root = d_inode(sb->s_root);
 
 	if (atomic64_read(&mdsc->quotarealms_count) > 0)
 		return true;
 	/* if root is the real CephFS root, we don't have quota realms */
-	if (sb->s_root->d_inode &&
-	    (sb->s_root->d_inode->i_ino == CEPH_INO_ROOT))
+	if (root && ceph_ino(root) == CEPH_INO_ROOT)
 		return false;
 	/* otherwise, we can't know for sure */
 	return true;
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index 4c3c964b1c543..a3995ebe0623e 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -457,15 +457,7 @@ ceph_vino(const struct inode *inode)
 	return ceph_inode(inode)->i_vino;
 }
 
-/*
- * ino_t is <64 bits on many architectures, blech.
- *
- *               i_ino (kernel inode)   st_ino (userspace)
- * i386          32                     32
- * x86_64+ino32  64                     32
- * x86_64        64                     64
- */
-static inline u32 ceph_ino_to_ino32(__u64 vino)
+static inline u32 ceph_ino_to_ino32(u64 vino)
 {
 	u32 ino = vino & 0xffffffff;
 	ino ^= vino >> 32;
@@ -475,34 +467,17 @@ static inline u32 ceph_ino_to_ino32(__u64 vino)
 }
 
 /*
- * kernel i_ino value
+ * Inode numbers in cephfs are 64 bits, but inode->i_ino is 32-bits on
+ * some arches. We generally do not use this value inside the ceph driver, but
+ * we do want to set it to something, so that generic vfs code has an
+ * appropriate value for tracepoints and the like.
  */
-static inline ino_t ceph_vino_to_ino(struct ceph_vino vino)
+static inline ino_t ceph_vino_to_ino_t(struct ceph_vino vino)
 {
-#if BITS_PER_LONG == 32
-	return ceph_ino_to_ino32(vino.ino);
-#else
+	if (sizeof(ino_t) == sizeof(u32))
+		return ceph_ino_to_ino32(vino.ino);
 	return (ino_t)vino.ino;
-#endif
-}
-
-/*
- * user-visible ino (stat, filldir)
- */
-#if BITS_PER_LONG == 32
-static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
-{
-	return ino;
-}
-#else
-static inline ino_t ceph_translate_ino(struct super_block *sb, ino_t ino)
-{
-	if (ceph_test_mount_opt(ceph_sb_to_client(sb), INO32))
-		ino = ceph_ino_to_ino32(ino);
-	return ino;
 }
-#endif
-
 
 /* for printf-style formatting */
 #define ceph_vinop(i) ceph_inode(i)->i_vino.ino, ceph_inode(i)->i_vino.snap
@@ -511,11 +486,34 @@ static inline u64 ceph_ino(struct inode *inode)
 {
 	return ceph_inode(inode)->i_vino.ino;
 }
+
 static inline u64 ceph_snap(struct inode *inode)
 {
 	return ceph_inode(inode)->i_vino.snap;
 }
 
+/**
+ * ceph_present_ino - format an inode number for presentation to userland
+ * @sb: superblock where the inode lives
+ * @ino: inode number to (possibly) convert
+ *
+ * If the user mounted with the ino32 option, then the 64-bit value needs
+ * to be converted to something that can fit inside 32 bits. Note that
+ * internal kernel code never uses this value, so this is entirely for
+ * userland consumption.
+ */
+static inline u64 ceph_present_ino(struct super_block *sb, u64 ino)
+{
+	if (unlikely(ceph_test_mount_opt(ceph_sb_to_client(sb), INO32)))
+		return ceph_ino_to_ino32(ino);
+	return ino;
+}
+
+static inline u64 ceph_present_inode(struct inode *inode)
+{
+	return ceph_present_ino(inode->i_sb, ceph_ino(inode));
+}
+
 static inline int ceph_ino_compare(struct inode *inode, void *data)
 {
 	struct ceph_vino *pvino = (struct ceph_vino *)data;
@@ -524,11 +522,16 @@ static inline int ceph_ino_compare(struct inode *inode, void *data)
 		ci->i_vino.snap == pvino->snap;
 }
 
+
 static inline struct inode *ceph_find_inode(struct super_block *sb,
 					    struct ceph_vino vino)
 {
-	ino_t t = ceph_vino_to_ino(vino);
-	return ilookup5(sb, t, ceph_ino_compare, &vino);
+	/*
+	 * NB: The hashval will be run through the fs/inode.c hash function
+	 * anyway, so there is no need to squash the inode number down to
+	 * 32-bits first. Just use low-order bits on arches with 32-bit long.
+	 */
+	return ilookup5(sb, (unsigned long)vino.ino, ceph_ino_compare, &vino);
 }
 
 
-- 
GitLab


From baa5b28b7a474f66a511ebf71a2ade510652a2f6 Mon Sep 17 00:00:00 2001
From: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Date: Tue, 11 Aug 2020 14:57:22 +0530
Subject: [PATCH 0552/1341] RDMA/rtrs-srv: Replace device_register with
 device_initialize and device_add

There are error cases when we will call free_srv before device kobject is
initialized; in such cases calling put_device generates the following
warning:

 kobject: '(null)' (000000009f5445ed): is not initialized, yet
 kobject_put() is being called.

So call device_initialize() only once when the server is allocated. If we
end up calling put_srv() and subsequently free_srv(), our call to
put_device() would result in deletion of the obj. Call device_add() later
when we actually have a connection. Correspondingly, call device_del()
instead of device_unregister() when srv->dev_ref falls to 0.

Fixes: 9cb837480424 ("RDMA/rtrs: server: main functionality")
Link: https://lore.kernel.org/r/20200811092722.2450-1-haris.iqbal@cloud.ionos.com
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Reviewed-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c | 8 ++++----
 drivers/infiniband/ulp/rtrs/rtrs-srv.c       | 1 +
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
index 3d7877534bcc9..2f981ae970767 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
@@ -182,16 +182,16 @@ static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
 	 * sysfs files are created
 	 */
 	dev_set_uevent_suppress(&srv->dev, true);
-	err = device_register(&srv->dev);
+	err = device_add(&srv->dev);
 	if (err) {
-		pr_err("device_register(): %d\n", err);
+		pr_err("device_add(): %d\n", err);
 		goto put;
 	}
 	srv->kobj_paths = kobject_create_and_add("paths", &srv->dev.kobj);
 	if (!srv->kobj_paths) {
 		err = -ENOMEM;
 		pr_err("kobject_create_and_add(): %d\n", err);
-		device_unregister(&srv->dev);
+		device_del(&srv->dev);
 		goto unlock;
 	}
 	dev_set_uevent_suppress(&srv->dev, false);
@@ -216,7 +216,7 @@ rtrs_srv_destroy_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
 		kobject_del(srv->kobj_paths);
 		kobject_put(srv->kobj_paths);
 		mutex_unlock(&srv->paths_mutex);
-		device_unregister(&srv->dev);
+		device_del(&srv->dev);
 	} else {
 		mutex_unlock(&srv->paths_mutex);
 	}
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index a219bd1bdbc26..b61a18e57aeba 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -1336,6 +1336,7 @@ static struct rtrs_srv *__alloc_srv(struct rtrs_srv_ctx *ctx,
 	uuid_copy(&srv->paths_uuid, paths_uuid);
 	srv->queue_depth = sess_queue_depth;
 	srv->ctx = ctx;
+	device_initialize(&srv->dev);
 
 	srv->chunks = kcalloc(srv->queue_depth, sizeof(*srv->chunks),
 			      GFP_KERNEL);
-- 
GitLab


From 60b1af64eb35074a4f2d41cc1e503a7671e68963 Mon Sep 17 00:00:00 2001
From: Yi Zhang <yi.zhang@redhat.com>
Date: Thu, 20 Aug 2020 23:36:46 +0800
Subject: [PATCH 0553/1341] RDMA/rxe: Fix the parent sysfs read when the
 interface has 15 chars

'parent' sysfs reads will yield '\0' bytes when the interface name has 15
chars, and there will no "\n" output.

To reproduce, create one interface with 15 chars:

 [root@test ~]# ip a s enp0s29u1u7u3c2
 2: enp0s29u1u7u3c2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UNKNOWN group default qlen 1000
     link/ether 02:21:28:57:47:17 brd ff:ff:ff:ff:ff:ff
     inet6 fe80::ac41:338f:5bcd:c222/64 scope link noprefixroute
        valid_lft forever preferred_lft forever
 [root@test ~]# modprobe rdma_rxe
 [root@test ~]# echo enp0s29u1u7u3c2 > /sys/module/rdma_rxe/parameters/add
 [root@test ~]# cat /sys/class/infiniband/rxe0/parent
 enp0s29u1u7u3c2[root@test ~]#
 [root@test ~]# f="/sys/class/infiniband/rxe0/parent"
 [root@test ~]# echo "$(<"$f")"
 -bash: warning: command substitution: ignored null byte in input
 enp0s29u1u7u3c2

Use scnprintf and PAGE_SIZE to fill the sysfs output buffer.

Cc: stable@vger.kernel.org
Fixes: 8700e3e7c485 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20200820153646.31316-1-yi.zhang@redhat.com
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Yi Zhang <yi.zhang@redhat.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/sw/rxe/rxe_verbs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c
index bb61e534e4682..756980f79951d 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.c
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.c
@@ -1056,7 +1056,7 @@ static ssize_t parent_show(struct device *device,
 	struct rxe_dev *rxe =
 		rdma_device_to_drv_device(device, struct rxe_dev, ib_dev);
 
-	return snprintf(buf, 16, "%s\n", rxe_parent_name(rxe, 1));
+	return scnprintf(buf, PAGE_SIZE, "%s\n", rxe_parent_name(rxe, 1));
 }
 
 static DEVICE_ATTR_RO(parent);
-- 
GitLab


From 496ceaf12432b3d136dcdec48424312e71359ea7 Mon Sep 17 00:00:00 2001
From: Jeff Layton <jlayton@kernel.org>
Date: Thu, 20 Aug 2020 11:00:26 -0400
Subject: [PATCH 0554/1341] ceph: don't allow setlease on cephfs

Leases don't currently work correctly on kcephfs, as they are not broken
when caps are revoked. They could eventually be implemented similarly to
how we did them in libcephfs, but for now don't allow them.

[ idryomov: no need for simple_nosetlease() in ceph_dir_fops and
  ceph_snapdir_fops ]

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
 fs/ceph/file.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 81d2cc8dbb6d5..7661a3f47772a 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -2507,6 +2507,7 @@ const struct file_operations ceph_file_fops = {
 	.mmap = ceph_mmap,
 	.fsync = ceph_fsync,
 	.lock = ceph_lock,
+	.setlease = simple_nosetlease,
 	.flock = ceph_flock,
 	.splice_read = generic_file_splice_read,
 	.splice_write = iter_file_splice_write,
-- 
GitLab


From 0235bc04627d02a08f7ad9d226a8fe78e6c4a1c3 Mon Sep 17 00:00:00 2001
From: Rander Wang <rander.wang@intel.com>
Date: Fri, 21 Aug 2020 14:55:53 -0500
Subject: [PATCH 0555/1341] ASoC: Intel: tgl_max98373: fix a runtime pm issue
 in multi-thread case

When the playback & capture streams are stopped simultaneously, the
SOF PCI device will remain pm_runtime active. The root-cause is a race
condition with two threads reaching the trigger function at the same
time. They see another stream is active so the dapm pin is not
disabled, so the codec remains active as well as the parent PCI
device.

For max98373, the capture stream provides feedback when playback is
working and it is unused when playback is stopped. So the dapm pin
should be set only when playback is active.

Fixes: 94d2d08974746 ('ASoC: Intel: Boards: tgl_max98373: add dai_trigger function')
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200821195603.215535-7-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/intel/boards/sof_maxim_common.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/sound/soc/intel/boards/sof_maxim_common.c b/sound/soc/intel/boards/sof_maxim_common.c
index 1a69615920297..b6e63ea13d64e 100644
--- a/sound/soc/intel/boards/sof_maxim_common.c
+++ b/sound/soc/intel/boards/sof_maxim_common.c
@@ -66,6 +66,10 @@ int max98373_trigger(struct snd_pcm_substream *substream, int cmd)
 	int j;
 	int ret = 0;
 
+	/* set spk pin by playback only */
+	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
+		return 0;
+
 	for_each_rtd_codec_dais(rtd, j, codec_dai) {
 		struct snd_soc_component *component = codec_dai->component;
 		struct snd_soc_dapm_context *dapm =
@@ -86,9 +90,6 @@ int max98373_trigger(struct snd_pcm_substream *substream, int cmd)
 		case SNDRV_PCM_TRIGGER_STOP:
 		case SNDRV_PCM_TRIGGER_SUSPEND:
 		case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
-			/* Make sure no streams are active before disable pin */
-			if (snd_soc_dai_active(codec_dai) != 1)
-				break;
 			ret = snd_soc_dapm_disable_pin(dapm, pin_name);
 			if (!ret)
 				snd_soc_dapm_sync(dapm);
-- 
GitLab


From 6a9dc5fd6170d0a41c8a14eb19e63d94bea5705a Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Date: Mon, 24 Aug 2020 15:36:14 -0500
Subject: [PATCH 0556/1341] lib: Revert use of fallthrough pseudo-keyword in
 lib/

The following build error for powerpc64 was reported by Nathan Chancellor:

  "$ scripts/config --file arch/powerpc/configs/powernv_defconfig -e KERNEL_XZ

   $ make -skj"$(nproc)" ARCH=powerpc CROSS_COMPILE=powerpc64le-linux- distclean powernv_defconfig zImage
   ...
   In file included from arch/powerpc/boot/../../../lib/decompress_unxz.c:234,
                    from arch/powerpc/boot/decompress.c:38:
   arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c: In function 'dec_main':
   arch/powerpc/boot/../../../lib/xz/xz_dec_stream.c:586:4: error: 'fallthrough' undeclared (first use in this function)
     586 |    fallthrough;
         |    ^~~~~~~~~~~

   This will end up affecting distribution configurations such as Debian
   and OpenSUSE according to my testing. I am not sure what the solution
   is, the PowerPC wrapper does not set -D__KERNEL__ so I am not sure
   that compiler_attributes.h can be safely included."

In order to avoid these sort of problems, it seems that the best
solution is to use /* fall through */ comments instead of the
fallthrough pseudo-keyword macro in lib/, for now.

Reported-by: Nathan Chancellor <natechancellor@gmail.com>
Fixes: df561f6688fe ("treewide: Use fallthrough pseudo-keyword")
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-and-tested-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 lib/asn1_decoder.c      |  4 ++--
 lib/assoc_array.c       |  2 +-
 lib/bootconfig.c        |  4 ++--
 lib/cmdline.c           | 10 +++++-----
 lib/dim/net_dim.c       |  2 +-
 lib/dim/rdma_dim.c      |  4 ++--
 lib/glob.c              |  2 +-
 lib/siphash.c           | 36 ++++++++++++++++++------------------
 lib/ts_fsm.c            |  2 +-
 lib/vsprintf.c          | 14 +++++++-------
 lib/xz/xz_dec_lzma2.c   |  4 ++--
 lib/xz/xz_dec_stream.c  | 16 ++++++++--------
 lib/zstd/bitstream.h    | 10 +++++-----
 lib/zstd/compress.c     |  2 +-
 lib/zstd/decompress.c   | 12 ++++++------
 lib/zstd/huf_compress.c |  4 ++--
 16 files changed, 64 insertions(+), 64 deletions(-)

diff --git a/lib/asn1_decoder.c b/lib/asn1_decoder.c
index 13da529e2e724..58f72b25f8e9e 100644
--- a/lib/asn1_decoder.c
+++ b/lib/asn1_decoder.c
@@ -381,7 +381,7 @@ int asn1_ber_decoder(const struct asn1_decoder *decoder,
 	case ASN1_OP_END_SET_ACT:
 		if (unlikely(!(flags & FLAG_MATCHED)))
 			goto tag_mismatch;
-		fallthrough;
+		/* fall through */
 
 	case ASN1_OP_END_SEQ:
 	case ASN1_OP_END_SET_OF:
@@ -448,7 +448,7 @@ int asn1_ber_decoder(const struct asn1_decoder *decoder,
 			pc += asn1_op_lengths[op];
 			goto next_op;
 		}
-		fallthrough;
+		/* fall through */
 
 	case ASN1_OP_ACT:
 		ret = actions[machine[pc + 1]](context, hdr, tag, data + tdp, len);
diff --git a/lib/assoc_array.c b/lib/assoc_array.c
index 04c98799c3baf..6f4bcf5245547 100644
--- a/lib/assoc_array.c
+++ b/lib/assoc_array.c
@@ -1113,7 +1113,7 @@ struct assoc_array_edit *assoc_array_delete(struct assoc_array *array,
 						index_key))
 				goto found_leaf;
 		}
-		fallthrough;
+		/* fall through */
 	case assoc_array_walk_tree_empty:
 	case assoc_array_walk_found_wrong_shortcut:
 	default:
diff --git a/lib/bootconfig.c b/lib/bootconfig.c
index 1b5de2a45b277..2c905a91d4ebe 100644
--- a/lib/bootconfig.c
+++ b/lib/bootconfig.c
@@ -817,7 +817,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos)
 							q - 2);
 				break;
 			}
-			fallthrough;
+			/* fall through */
 		case '=':
 			ret = xbc_parse_kv(&p, q, c);
 			break;
@@ -826,7 +826,7 @@ int __init xbc_init(char *buf, const char **emsg, int *epos)
 			break;
 		case '#':
 			q = skip_comment(q);
-			fallthrough;
+			/* fall through */
 		case ';':
 		case '\n':
 			ret = xbc_parse_key(&p, q);
diff --git a/lib/cmdline.c b/lib/cmdline.c
index 55768b4f3f587..fbb9981a04a41 100644
--- a/lib/cmdline.c
+++ b/lib/cmdline.c
@@ -132,23 +132,23 @@ unsigned long long memparse(const char *ptr, char **retptr)
 	case 'E':
 	case 'e':
 		ret <<= 10;
-		fallthrough;
+		/* fall through */
 	case 'P':
 	case 'p':
 		ret <<= 10;
-		fallthrough;
+		/* fall through */
 	case 'T':
 	case 't':
 		ret <<= 10;
-		fallthrough;
+		/* fall through */
 	case 'G':
 	case 'g':
 		ret <<= 10;
-		fallthrough;
+		/* fall through */
 	case 'M':
 	case 'm':
 		ret <<= 10;
-		fallthrough;
+		/* fall through */
 	case 'K':
 	case 'k':
 		ret <<= 10;
diff --git a/lib/dim/net_dim.c b/lib/dim/net_dim.c
index 06811d866775c..a4db51c212663 100644
--- a/lib/dim/net_dim.c
+++ b/lib/dim/net_dim.c
@@ -233,7 +233,7 @@ void net_dim(struct dim *dim, struct dim_sample end_sample)
 			schedule_work(&dim->work);
 			break;
 		}
-		fallthrough;
+		/* fall through */
 	case DIM_START_MEASURE:
 		dim_update_sample(end_sample.event_ctr, end_sample.pkt_ctr,
 				  end_sample.byte_ctr, &dim->start_sample);
diff --git a/lib/dim/rdma_dim.c b/lib/dim/rdma_dim.c
index 15462d54758d3..f7e26c7b4749f 100644
--- a/lib/dim/rdma_dim.c
+++ b/lib/dim/rdma_dim.c
@@ -59,7 +59,7 @@ static bool rdma_dim_decision(struct dim_stats *curr_stats, struct dim *dim)
 			break;
 		case DIM_STATS_WORSE:
 			dim_turn(dim);
-			fallthrough;
+			/* fall through */
 		case DIM_STATS_BETTER:
 			step_res = rdma_dim_step(dim);
 			if (step_res == DIM_ON_EDGE)
@@ -94,7 +94,7 @@ void rdma_dim(struct dim *dim, u64 completions)
 			schedule_work(&dim->work);
 			break;
 		}
-		fallthrough;
+		/* fall through */
 	case DIM_START_MEASURE:
 		dim->state = DIM_MEASURE_IN_PROGRESS;
 		dim_update_sample_with_comps(curr_sample->event_ctr, 0, 0,
diff --git a/lib/glob.c b/lib/glob.c
index 85ecbda45cd8c..52e3ed7e4a9b8 100644
--- a/lib/glob.c
+++ b/lib/glob.c
@@ -102,7 +102,7 @@ bool __pure glob_match(char const *pat, char const *str)
 			break;
 		case '\\':
 			d = *pat++;
-			fallthrough;
+			/* fall through */
 		default:	/* Literal character */
 literal:
 			if (c == d) {
diff --git a/lib/siphash.c b/lib/siphash.c
index a90112ee72a1f..c47bb6ff21499 100644
--- a/lib/siphash.c
+++ b/lib/siphash.c
@@ -68,11 +68,11 @@ u64 __siphash_aligned(const void *data, size_t len, const siphash_key_t *key)
 						  bytemask_from_count(left)));
 #else
 	switch (left) {
-	case 7: b |= ((u64)end[6]) << 48; fallthrough;
-	case 6: b |= ((u64)end[5]) << 40; fallthrough;
-	case 5: b |= ((u64)end[4]) << 32; fallthrough;
+	case 7: b |= ((u64)end[6]) << 48; /* fall through */
+	case 6: b |= ((u64)end[5]) << 40; /* fall through */
+	case 5: b |= ((u64)end[4]) << 32; /* fall through */
 	case 4: b |= le32_to_cpup(data); break;
-	case 3: b |= ((u64)end[2]) << 16; fallthrough;
+	case 3: b |= ((u64)end[2]) << 16; /* fall through */
 	case 2: b |= le16_to_cpup(data); break;
 	case 1: b |= end[0];
 	}
@@ -101,11 +101,11 @@ u64 __siphash_unaligned(const void *data, size_t len, const siphash_key_t *key)
 						  bytemask_from_count(left)));
 #else
 	switch (left) {
-	case 7: b |= ((u64)end[6]) << 48; fallthrough;
-	case 6: b |= ((u64)end[5]) << 40; fallthrough;
-	case 5: b |= ((u64)end[4]) << 32; fallthrough;
+	case 7: b |= ((u64)end[6]) << 48; /* fall through */
+	case 6: b |= ((u64)end[5]) << 40; /* fall through */
+	case 5: b |= ((u64)end[4]) << 32; /* fall through */
 	case 4: b |= get_unaligned_le32(end); break;
-	case 3: b |= ((u64)end[2]) << 16; fallthrough;
+	case 3: b |= ((u64)end[2]) << 16; /* fall through */
 	case 2: b |= get_unaligned_le16(end); break;
 	case 1: b |= end[0];
 	}
@@ -268,11 +268,11 @@ u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key)
 						  bytemask_from_count(left)));
 #else
 	switch (left) {
-	case 7: b |= ((u64)end[6]) << 48; fallthrough;
-	case 6: b |= ((u64)end[5]) << 40; fallthrough;
-	case 5: b |= ((u64)end[4]) << 32; fallthrough;
+	case 7: b |= ((u64)end[6]) << 48; /* fall through */
+	case 6: b |= ((u64)end[5]) << 40; /* fall through */
+	case 5: b |= ((u64)end[4]) << 32; /* fall through */
 	case 4: b |= le32_to_cpup(data); break;
-	case 3: b |= ((u64)end[2]) << 16; fallthrough;
+	case 3: b |= ((u64)end[2]) << 16; /* fall through */
 	case 2: b |= le16_to_cpup(data); break;
 	case 1: b |= end[0];
 	}
@@ -301,11 +301,11 @@ u32 __hsiphash_unaligned(const void *data, size_t len,
 						  bytemask_from_count(left)));
 #else
 	switch (left) {
-	case 7: b |= ((u64)end[6]) << 48; fallthrough;
-	case 6: b |= ((u64)end[5]) << 40; fallthrough;
-	case 5: b |= ((u64)end[4]) << 32; fallthrough;
+	case 7: b |= ((u64)end[6]) << 48; /* fall through */
+	case 6: b |= ((u64)end[5]) << 40; /* fall through */
+	case 5: b |= ((u64)end[4]) << 32; /* fall through */
 	case 4: b |= get_unaligned_le32(end); break;
-	case 3: b |= ((u64)end[2]) << 16; fallthrough;
+	case 3: b |= ((u64)end[2]) << 16; /* fall through */
 	case 2: b |= get_unaligned_le16(end); break;
 	case 1: b |= end[0];
 	}
@@ -431,7 +431,7 @@ u32 __hsiphash_aligned(const void *data, size_t len, const hsiphash_key_t *key)
 		v0 ^= m;
 	}
 	switch (left) {
-	case 3: b |= ((u32)end[2]) << 16; fallthrough;
+	case 3: b |= ((u32)end[2]) << 16; /* fall through */
 	case 2: b |= le16_to_cpup(data); break;
 	case 1: b |= end[0];
 	}
@@ -454,7 +454,7 @@ u32 __hsiphash_unaligned(const void *data, size_t len,
 		v0 ^= m;
 	}
 	switch (left) {
-	case 3: b |= ((u32)end[2]) << 16; fallthrough;
+	case 3: b |= ((u32)end[2]) << 16; /* fall through */
 	case 2: b |= get_unaligned_le16(end); break;
 	case 1: b |= end[0];
 	}
diff --git a/lib/ts_fsm.c b/lib/ts_fsm.c
index 64fd9015ad80b..ab749ec10ab53 100644
--- a/lib/ts_fsm.c
+++ b/lib/ts_fsm.c
@@ -193,7 +193,7 @@ static unsigned int fsm_find(struct ts_config *conf, struct ts_state *state)
 				TOKEN_MISMATCH();
 
 			block_idx++;
-			fallthrough;
+			/* fall through */
 
 		case TS_FSM_ANY:
 			if (next == NULL)
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 19ebe1b257eca..afb9521ddf919 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -1265,7 +1265,7 @@ char *mac_address_string(char *buf, char *end, u8 *addr,
 
 	case 'R':
 		reversed = true;
-		fallthrough;
+		/* fall through */
 
 	default:
 		separator = ':';
@@ -1682,7 +1682,7 @@ char *uuid_string(char *buf, char *end, const u8 *addr,
 	switch (*(++fmt)) {
 	case 'L':
 		uc = true;
-		fallthrough;
+		/* fall through */
 	case 'l':
 		index = guid_index;
 		break;
@@ -2219,7 +2219,7 @@ char *pointer(const char *fmt, char *buf, char *end, void *ptr,
 	case 'S':
 	case 's':
 		ptr = dereference_symbol_descriptor(ptr);
-		fallthrough;
+		/* fall through */
 	case 'B':
 		return symbol_string(buf, end, ptr, spec, fmt);
 	case 'R':
@@ -2450,7 +2450,7 @@ int format_decode(const char *fmt, struct printf_spec *spec)
 
 	case 'x':
 		spec->flags |= SMALL;
-		fallthrough;
+		/* fall through */
 
 	case 'X':
 		spec->base = 16;
@@ -2468,7 +2468,7 @@ int format_decode(const char *fmt, struct printf_spec *spec)
 		 * utility, treat it as any other invalid or
 		 * unsupported format specifier.
 		 */
-		fallthrough;
+		/* fall through */
 
 	default:
 		WARN_ONCE(1, "Please remove unsupported %%%c in format string\n", *fmt);
@@ -3411,10 +3411,10 @@ int vsscanf(const char *buf, const char *fmt, va_list args)
 			break;
 		case 'i':
 			base = 0;
-			fallthrough;
+			/* fall through */
 		case 'd':
 			is_sign = true;
-			fallthrough;
+			/* fall through */
 		case 'u':
 			break;
 		case '%':
diff --git a/lib/xz/xz_dec_lzma2.c b/lib/xz/xz_dec_lzma2.c
index ca2603abee08e..65a1aad8c223b 100644
--- a/lib/xz/xz_dec_lzma2.c
+++ b/lib/xz/xz_dec_lzma2.c
@@ -1043,7 +1043,7 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s,
 
 			s->lzma2.sequence = SEQ_LZMA_PREPARE;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_LZMA_PREPARE:
 			if (s->lzma2.compressed < RC_INIT_BYTES)
@@ -1055,7 +1055,7 @@ XZ_EXTERN enum xz_ret xz_dec_lzma2_run(struct xz_dec_lzma2 *s,
 			s->lzma2.compressed -= RC_INIT_BYTES;
 			s->lzma2.sequence = SEQ_LZMA_RUN;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_LZMA_RUN:
 			/*
diff --git a/lib/xz/xz_dec_stream.c b/lib/xz/xz_dec_stream.c
index fea86deaaa01d..32ab2a08b7cbc 100644
--- a/lib/xz/xz_dec_stream.c
+++ b/lib/xz/xz_dec_stream.c
@@ -583,7 +583,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 			if (ret != XZ_OK)
 				return ret;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_BLOCK_START:
 			/* We need one byte of input to continue. */
@@ -608,7 +608,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 			s->temp.pos = 0;
 			s->sequence = SEQ_BLOCK_HEADER;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_BLOCK_HEADER:
 			if (!fill_temp(s, b))
@@ -620,7 +620,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_BLOCK_UNCOMPRESS;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_BLOCK_UNCOMPRESS:
 			ret = dec_block(s, b);
@@ -629,7 +629,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_BLOCK_PADDING;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_BLOCK_PADDING:
 			/*
@@ -651,7 +651,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_BLOCK_CHECK;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_BLOCK_CHECK:
 			if (s->check_type == XZ_CHECK_CRC32) {
@@ -675,7 +675,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_INDEX_PADDING;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_INDEX_PADDING:
 			while ((s->index.size + (b->in_pos - s->in_start))
@@ -699,7 +699,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 
 			s->sequence = SEQ_INDEX_CRC32;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_INDEX_CRC32:
 			ret = crc32_validate(s, b);
@@ -709,7 +709,7 @@ static enum xz_ret dec_main(struct xz_dec *s, struct xz_buf *b)
 			s->temp.size = STREAM_HEADER_SIZE;
 			s->sequence = SEQ_STREAM_FOOTER;
 
-			fallthrough;
+			/* fall through */
 
 		case SEQ_STREAM_FOOTER:
 			if (!fill_temp(s, b))
diff --git a/lib/zstd/bitstream.h b/lib/zstd/bitstream.h
index 7c65c66e41fd4..3a49784d5c61a 100644
--- a/lib/zstd/bitstream.h
+++ b/lib/zstd/bitstream.h
@@ -259,15 +259,15 @@ ZSTD_STATIC size_t BIT_initDStream(BIT_DStream_t *bitD, const void *srcBuffer, s
 		bitD->bitContainer = *(const BYTE *)(bitD->start);
 		switch (srcSize) {
 		case 7: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[6]) << (sizeof(bitD->bitContainer) * 8 - 16);
-			fallthrough;
+			/* fall through */
 		case 6: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[5]) << (sizeof(bitD->bitContainer) * 8 - 24);
-			fallthrough;
+			/* fall through */
 		case 5: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[4]) << (sizeof(bitD->bitContainer) * 8 - 32);
-			fallthrough;
+			/* fall through */
 		case 4: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[3]) << 24;
-			fallthrough;
+			/* fall through */
 		case 3: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[2]) << 16;
-			fallthrough;
+			/* fall through */
 		case 2: bitD->bitContainer += (size_t)(((const BYTE *)(srcBuffer))[1]) << 8;
 		default:;
 		}
diff --git a/lib/zstd/compress.c b/lib/zstd/compress.c
index b080264ed3adf..5e0b67003e550 100644
--- a/lib/zstd/compress.c
+++ b/lib/zstd/compress.c
@@ -3182,7 +3182,7 @@ static size_t ZSTD_compressStream_generic(ZSTD_CStream *zcs, void *dst, size_t *
 				zcs->outBuffFlushedSize = 0;
 				zcs->stage = zcss_flush; /* pass-through to flush stage */
 			}
-			fallthrough;
+			/* fall through */
 
 		case zcss_flush: {
 			size_t const toFlush = zcs->outBuffContentSize - zcs->outBuffFlushedSize;
diff --git a/lib/zstd/decompress.c b/lib/zstd/decompress.c
index 66cd487a326a8..db6761ea4deb5 100644
--- a/lib/zstd/decompress.c
+++ b/lib/zstd/decompress.c
@@ -442,7 +442,7 @@ size_t ZSTD_decodeLiteralsBlock(ZSTD_DCtx *dctx, const void *src, size_t srcSize
 		case set_repeat:
 			if (dctx->litEntropy == 0)
 				return ERROR(dictionary_corrupted);
-			fallthrough;
+			/* fall through */
 		case set_compressed:
 			if (srcSize < 5)
 				return ERROR(corruption_detected); /* srcSize >= MIN_CBLOCK_SIZE == 3; here we need up to 5 for case 3 */
@@ -1768,7 +1768,7 @@ size_t ZSTD_decompressContinue(ZSTD_DCtx *dctx, void *dst, size_t dstCapacity, c
 			return 0;
 		}
 		dctx->expected = 0; /* not necessary to copy more */
-		fallthrough;
+		/* fall through */
 
 	case ZSTDds_decodeFrameHeader:
 		memcpy(dctx->headerBuffer + ZSTD_frameHeaderSize_prefix, src, dctx->expected);
@@ -2309,7 +2309,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 		switch (zds->stage) {
 		case zdss_init:
 			ZSTD_resetDStream(zds); /* transparent reset on starting decoding a new frame */
-			fallthrough;
+			/* fall through */
 
 		case zdss_loadHeader: {
 			size_t const hSize = ZSTD_getFrameParams(&zds->fParams, zds->headerBuffer, zds->lhSize);
@@ -2376,7 +2376,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 			}
 			zds->stage = zdss_read;
 		}
-			fallthrough;
+			/* fall through */
 
 		case zdss_read: {
 			size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx);
@@ -2405,7 +2405,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 			zds->stage = zdss_load;
 			/* pass-through */
 		}
-			fallthrough;
+			/* fall through */
 
 		case zdss_load: {
 			size_t const neededInSize = ZSTD_nextSrcSizeToDecompress(zds->dctx);
@@ -2438,7 +2438,7 @@ size_t ZSTD_decompressStream(ZSTD_DStream *zds, ZSTD_outBuffer *output, ZSTD_inB
 				/* pass-through */
 			}
 		}
-			fallthrough;
+			/* fall through */
 
 		case zdss_flush: {
 			size_t const toFlushSize = zds->outEnd - zds->outStart;
diff --git a/lib/zstd/huf_compress.c b/lib/zstd/huf_compress.c
index 08b4ae80aed43..e727812d12aad 100644
--- a/lib/zstd/huf_compress.c
+++ b/lib/zstd/huf_compress.c
@@ -556,9 +556,9 @@ size_t HUF_compress1X_usingCTable(void *dst, size_t dstSize, const void *src, si
 	n = srcSize & ~3; /* join to mod 4 */
 	switch (srcSize & 3) {
 	case 3: HUF_encodeSymbol(&bitC, ip[n + 2], CTable); HUF_FLUSHBITS_2(&bitC);
-		fallthrough;
+		/* fall through */
 	case 2: HUF_encodeSymbol(&bitC, ip[n + 1], CTable); HUF_FLUSHBITS_1(&bitC);
-		fallthrough;
+		/* fall through */
 	case 1: HUF_encodeSymbol(&bitC, ip[n + 0], CTable); HUF_FLUSHBITS(&bitC);
 	case 0:
 	default:;
-- 
GitLab


From 1838d6c62f57836639bd3d83e7855e0ee4f6defc Mon Sep 17 00:00:00 2001
From: Yuusuke Ashizuka <ashiduka@fujitsu.com>
Date: Thu, 20 Aug 2020 18:43:07 +0900
Subject: [PATCH 0557/1341] ravb: Fixed to be able to unload modules

When this driver is built as a module, I cannot rmmod it after insmoding
it.
This is because that this driver calls ravb_mdio_init() at the time of
probe, and module->refcnt is incremented by alloc_mdio_bitbang() called
after that.
Therefore, even if ifup is not performed, the driver is in use and rmmod
cannot be performed.

$ lsmod
Module                  Size  Used by
ravb                   40960  1
$ rmmod ravb
rmmod: ERROR: Module ravb is in use

Call ravb_mdio_init() at open and free_mdio_bitbang() at close, thereby
rmmod is possible in the ifdown state.

Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
Signed-off-by: Yuusuke Ashizuka <ashiduka@fujitsu.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/renesas/ravb_main.c | 110 +++++++++++------------
 1 file changed, 55 insertions(+), 55 deletions(-)

diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
index 99f7aae102ce1..df89d09b253e2 100644
--- a/drivers/net/ethernet/renesas/ravb_main.c
+++ b/drivers/net/ethernet/renesas/ravb_main.c
@@ -1342,6 +1342,51 @@ static inline int ravb_hook_irq(unsigned int irq, irq_handler_t handler,
 	return error;
 }
 
+/* MDIO bus init function */
+static int ravb_mdio_init(struct ravb_private *priv)
+{
+	struct platform_device *pdev = priv->pdev;
+	struct device *dev = &pdev->dev;
+	int error;
+
+	/* Bitbang init */
+	priv->mdiobb.ops = &bb_ops;
+
+	/* MII controller setting */
+	priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb);
+	if (!priv->mii_bus)
+		return -ENOMEM;
+
+	/* Hook up MII support for ethtool */
+	priv->mii_bus->name = "ravb_mii";
+	priv->mii_bus->parent = dev;
+	snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
+		 pdev->name, pdev->id);
+
+	/* Register MDIO bus */
+	error = of_mdiobus_register(priv->mii_bus, dev->of_node);
+	if (error)
+		goto out_free_bus;
+
+	return 0;
+
+out_free_bus:
+	free_mdio_bitbang(priv->mii_bus);
+	return error;
+}
+
+/* MDIO bus release function */
+static int ravb_mdio_release(struct ravb_private *priv)
+{
+	/* Unregister mdio bus */
+	mdiobus_unregister(priv->mii_bus);
+
+	/* Free bitbang info */
+	free_mdio_bitbang(priv->mii_bus);
+
+	return 0;
+}
+
 /* Network device open function for Ethernet AVB */
 static int ravb_open(struct net_device *ndev)
 {
@@ -1350,6 +1395,13 @@ static int ravb_open(struct net_device *ndev)
 	struct device *dev = &pdev->dev;
 	int error;
 
+	/* MDIO bus init */
+	error = ravb_mdio_init(priv);
+	if (error) {
+		netdev_err(ndev, "failed to initialize MDIO\n");
+		return error;
+	}
+
 	napi_enable(&priv->napi[RAVB_BE]);
 	napi_enable(&priv->napi[RAVB_NC]);
 
@@ -1427,6 +1479,7 @@ static int ravb_open(struct net_device *ndev)
 out_napi_off:
 	napi_disable(&priv->napi[RAVB_NC]);
 	napi_disable(&priv->napi[RAVB_BE]);
+	ravb_mdio_release(priv);
 	return error;
 }
 
@@ -1736,6 +1789,8 @@ static int ravb_close(struct net_device *ndev)
 	ravb_ring_free(ndev, RAVB_BE);
 	ravb_ring_free(ndev, RAVB_NC);
 
+	ravb_mdio_release(priv);
+
 	return 0;
 }
 
@@ -1887,51 +1942,6 @@ static const struct net_device_ops ravb_netdev_ops = {
 	.ndo_set_features	= ravb_set_features,
 };
 
-/* MDIO bus init function */
-static int ravb_mdio_init(struct ravb_private *priv)
-{
-	struct platform_device *pdev = priv->pdev;
-	struct device *dev = &pdev->dev;
-	int error;
-
-	/* Bitbang init */
-	priv->mdiobb.ops = &bb_ops;
-
-	/* MII controller setting */
-	priv->mii_bus = alloc_mdio_bitbang(&priv->mdiobb);
-	if (!priv->mii_bus)
-		return -ENOMEM;
-
-	/* Hook up MII support for ethtool */
-	priv->mii_bus->name = "ravb_mii";
-	priv->mii_bus->parent = dev;
-	snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
-		 pdev->name, pdev->id);
-
-	/* Register MDIO bus */
-	error = of_mdiobus_register(priv->mii_bus, dev->of_node);
-	if (error)
-		goto out_free_bus;
-
-	return 0;
-
-out_free_bus:
-	free_mdio_bitbang(priv->mii_bus);
-	return error;
-}
-
-/* MDIO bus release function */
-static int ravb_mdio_release(struct ravb_private *priv)
-{
-	/* Unregister mdio bus */
-	mdiobus_unregister(priv->mii_bus);
-
-	/* Free bitbang info */
-	free_mdio_bitbang(priv->mii_bus);
-
-	return 0;
-}
-
 static const struct of_device_id ravb_match_table[] = {
 	{ .compatible = "renesas,etheravb-r8a7790", .data = (void *)RCAR_GEN2 },
 	{ .compatible = "renesas,etheravb-r8a7794", .data = (void *)RCAR_GEN2 },
@@ -2174,13 +2184,6 @@ static int ravb_probe(struct platform_device *pdev)
 		eth_hw_addr_random(ndev);
 	}
 
-	/* MDIO bus init */
-	error = ravb_mdio_init(priv);
-	if (error) {
-		dev_err(&pdev->dev, "failed to initialize MDIO\n");
-		goto out_dma_free;
-	}
-
 	netif_napi_add(ndev, &priv->napi[RAVB_BE], ravb_poll, 64);
 	netif_napi_add(ndev, &priv->napi[RAVB_NC], ravb_poll, 64);
 
@@ -2202,8 +2205,6 @@ static int ravb_probe(struct platform_device *pdev)
 out_napi_del:
 	netif_napi_del(&priv->napi[RAVB_NC]);
 	netif_napi_del(&priv->napi[RAVB_BE]);
-	ravb_mdio_release(priv);
-out_dma_free:
 	dma_free_coherent(ndev->dev.parent, priv->desc_bat_size, priv->desc_bat,
 			  priv->desc_bat_dma);
 
@@ -2235,7 +2236,6 @@ static int ravb_remove(struct platform_device *pdev)
 	unregister_netdev(ndev);
 	netif_napi_del(&priv->napi[RAVB_NC]);
 	netif_napi_del(&priv->napi[RAVB_BE]);
-	ravb_mdio_release(priv);
 	pm_runtime_disable(&pdev->dev);
 	free_netdev(ndev);
 	platform_set_drvdata(pdev, NULL);
-- 
GitLab


From 3106ecb43a05dc3e009779764b9da245a5d082de Mon Sep 17 00:00:00 2001
From: Xin Long <lucien.xin@gmail.com>
Date: Fri, 21 Aug 2020 14:59:38 +0800
Subject: [PATCH 0558/1341] sctp: not disable bh in the whole
 sctp_get_port_local()

With disabling bh in the whole sctp_get_port_local(), when
snum == 0 and too many ports have been used, the do-while
loop will take the cpu for a long time and cause cpu stuck:

  [ ] watchdog: BUG: soft lockup - CPU#11 stuck for 22s!
  [ ] RIP: 0010:native_queued_spin_lock_slowpath+0x4de/0x940
  [ ] Call Trace:
  [ ]  _raw_spin_lock+0xc1/0xd0
  [ ]  sctp_get_port_local+0x527/0x650 [sctp]
  [ ]  sctp_do_bind+0x208/0x5e0 [sctp]
  [ ]  sctp_autobind+0x165/0x1e0 [sctp]
  [ ]  sctp_connect_new_asoc+0x355/0x480 [sctp]
  [ ]  __sctp_connect+0x360/0xb10 [sctp]

There's no need to disable bh in the whole function of
sctp_get_port_local. So fix this cpu stuck by removing
local_bh_disable() called at the beginning, and using
spin_lock_bh() instead.

The same thing was actually done for inet_csk_get_port() in
Commit ea8add2b1903 ("tcp/dccp: better use of ephemeral
ports in bind()").

Thanks to Marcelo for pointing the buggy code out.

v1->v2:
  - use cond_resched() to yield cpu to other tasks if needed,
    as Eric noticed.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Ying Xu <yinxu@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/sctp/socket.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index ec1fba1fbe717..836615f71a7d1 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -8060,8 +8060,6 @@ static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
 
 	pr_debug("%s: begins, snum:%d\n", __func__, snum);
 
-	local_bh_disable();
-
 	if (snum == 0) {
 		/* Search for an available port. */
 		int low, high, remaining, index;
@@ -8079,20 +8077,21 @@ static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
 				continue;
 			index = sctp_phashfn(net, rover);
 			head = &sctp_port_hashtable[index];
-			spin_lock(&head->lock);
+			spin_lock_bh(&head->lock);
 			sctp_for_each_hentry(pp, &head->chain)
 				if ((pp->port == rover) &&
 				    net_eq(net, pp->net))
 					goto next;
 			break;
 		next:
-			spin_unlock(&head->lock);
+			spin_unlock_bh(&head->lock);
+			cond_resched();
 		} while (--remaining > 0);
 
 		/* Exhausted local port range during search? */
 		ret = 1;
 		if (remaining <= 0)
-			goto fail;
+			return ret;
 
 		/* OK, here is the one we will use.  HEAD (the port
 		 * hash table list entry) is non-NULL and we hold it's
@@ -8107,7 +8106,7 @@ static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
 		 * port iterator, pp being NULL.
 		 */
 		head = &sctp_port_hashtable[sctp_phashfn(net, snum)];
-		spin_lock(&head->lock);
+		spin_lock_bh(&head->lock);
 		sctp_for_each_hentry(pp, &head->chain) {
 			if ((pp->port == snum) && net_eq(pp->net, net))
 				goto pp_found;
@@ -8207,10 +8206,7 @@ static int sctp_get_port_local(struct sock *sk, union sctp_addr *addr)
 	ret = 0;
 
 fail_unlock:
-	spin_unlock(&head->lock);
-
-fail:
-	local_bh_enable();
+	spin_unlock_bh(&head->lock);
 	return ret;
 }
 
-- 
GitLab


From d3b990b7f327e2afa98006e7666fb8ada8ed8683 Mon Sep 17 00:00:00 2001
From: Paul Moore <paul@paul-moore.com>
Date: Fri, 21 Aug 2020 16:34:52 -0400
Subject: [PATCH 0559/1341] netlabel: fix problems with mapping removal

This patch fixes two main problems seen when removing NetLabel
mappings: memory leaks and potentially extra audit noise.

The memory leaks are caused by not properly free'ing the mapping's
address selector struct when free'ing the entire entry as well as
not properly cleaning up a temporary mapping entry when adding new
address selectors to an existing entry.  This patch fixes both these
problems such that kmemleak reports no NetLabel associated leaks
after running the SELinux test suite.

The potentially extra audit noise was caused by the auditing code in
netlbl_domhsh_remove_entry() being called regardless of the entry's
validity.  If another thread had already marked the entry as invalid,
but not removed/free'd it from the list of mappings, then it was
possible that an additional mapping removal audit record would be
generated.  This patch fixes this by returning early from the removal
function when the entry was previously marked invalid.  This change
also had the side benefit of improving the code by decreasing the
indentation level of large chunk of code by one (accounting for most
of the diffstat).

Fixes: 63c416887437 ("netlabel: Add network address selectors to the NetLabel/LSM domain mapping")
Reported-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/netlabel/netlabel_domainhash.c | 59 +++++++++++++++---------------
 1 file changed, 30 insertions(+), 29 deletions(-)

diff --git a/net/netlabel/netlabel_domainhash.c b/net/netlabel/netlabel_domainhash.c
index d07de2c0fbc76..f73a8382c275e 100644
--- a/net/netlabel/netlabel_domainhash.c
+++ b/net/netlabel/netlabel_domainhash.c
@@ -85,6 +85,7 @@ static void netlbl_domhsh_free_entry(struct rcu_head *entry)
 			kfree(netlbl_domhsh_addr6_entry(iter6));
 		}
 #endif /* IPv6 */
+		kfree(ptr->def.addrsel);
 	}
 	kfree(ptr->domain);
 	kfree(ptr);
@@ -537,6 +538,8 @@ int netlbl_domhsh_add(struct netlbl_dom_map *entry,
 				goto add_return;
 		}
 #endif /* IPv6 */
+		/* cleanup the new entry since we've moved everything over */
+		netlbl_domhsh_free_entry(&entry->rcu);
 	} else
 		ret_val = -EINVAL;
 
@@ -580,6 +583,12 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
 {
 	int ret_val = 0;
 	struct audit_buffer *audit_buf;
+	struct netlbl_af4list *iter4;
+	struct netlbl_domaddr4_map *map4;
+#if IS_ENABLED(CONFIG_IPV6)
+	struct netlbl_af6list *iter6;
+	struct netlbl_domaddr6_map *map6;
+#endif /* IPv6 */
 
 	if (entry == NULL)
 		return -ENOENT;
@@ -597,6 +606,9 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
 		ret_val = -ENOENT;
 	spin_unlock(&netlbl_domhsh_lock);
 
+	if (ret_val)
+		return ret_val;
+
 	audit_buf = netlbl_audit_start_common(AUDIT_MAC_MAP_DEL, audit_info);
 	if (audit_buf != NULL) {
 		audit_log_format(audit_buf,
@@ -606,40 +618,29 @@ int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
 		audit_log_end(audit_buf);
 	}
 
-	if (ret_val == 0) {
-		struct netlbl_af4list *iter4;
-		struct netlbl_domaddr4_map *map4;
-#if IS_ENABLED(CONFIG_IPV6)
-		struct netlbl_af6list *iter6;
-		struct netlbl_domaddr6_map *map6;
-#endif /* IPv6 */
-
-		switch (entry->def.type) {
-		case NETLBL_NLTYPE_ADDRSELECT:
-			netlbl_af4list_foreach_rcu(iter4,
-					     &entry->def.addrsel->list4) {
-				map4 = netlbl_domhsh_addr4_entry(iter4);
-				cipso_v4_doi_putdef(map4->def.cipso);
-			}
+	switch (entry->def.type) {
+	case NETLBL_NLTYPE_ADDRSELECT:
+		netlbl_af4list_foreach_rcu(iter4, &entry->def.addrsel->list4) {
+			map4 = netlbl_domhsh_addr4_entry(iter4);
+			cipso_v4_doi_putdef(map4->def.cipso);
+		}
 #if IS_ENABLED(CONFIG_IPV6)
-			netlbl_af6list_foreach_rcu(iter6,
-					     &entry->def.addrsel->list6) {
-				map6 = netlbl_domhsh_addr6_entry(iter6);
-				calipso_doi_putdef(map6->def.calipso);
-			}
+		netlbl_af6list_foreach_rcu(iter6, &entry->def.addrsel->list6) {
+			map6 = netlbl_domhsh_addr6_entry(iter6);
+			calipso_doi_putdef(map6->def.calipso);
+		}
 #endif /* IPv6 */
-			break;
-		case NETLBL_NLTYPE_CIPSOV4:
-			cipso_v4_doi_putdef(entry->def.cipso);
-			break;
+		break;
+	case NETLBL_NLTYPE_CIPSOV4:
+		cipso_v4_doi_putdef(entry->def.cipso);
+		break;
 #if IS_ENABLED(CONFIG_IPV6)
-		case NETLBL_NLTYPE_CALIPSO:
-			calipso_doi_putdef(entry->def.calipso);
-			break;
+	case NETLBL_NLTYPE_CALIPSO:
+		calipso_doi_putdef(entry->def.calipso);
+		break;
 #endif /* IPv6 */
-		}
-		call_rcu(&entry->rcu, netlbl_domhsh_free_entry);
 	}
+	call_rcu(&entry->rcu, netlbl_domhsh_free_entry);
 
 	return ret_val;
 }
-- 
GitLab


From 1ee39c1448c4e0d480c5b390e2db1987561fb5c2 Mon Sep 17 00:00:00 2001
From: Xie He <xie.he.0141@gmail.com>
Date: Fri, 21 Aug 2020 14:26:59 -0700
Subject: [PATCH 0560/1341] drivers/net/wan/lapbether: Added needed_tailroom

The underlying Ethernet device may request necessary tailroom to be
allocated by setting needed_tailroom. This driver should also set
needed_tailroom to request the tailroom needed by the underlying
Ethernet device to be allocated.

Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/wan/lapbether.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index 1ea15f2123ed5..cc297ea9c6ece 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -340,6 +340,7 @@ static int lapbeth_new_device(struct net_device *dev)
 	 */
 	ndev->needed_headroom = -1 + 3 + 2 + dev->hard_header_len
 					   + dev->needed_headroom;
+	ndev->needed_tailroom = dev->needed_tailroom;
 
 	lapbeth = netdev_priv(ndev);
 	lapbeth->axdev = ndev;
-- 
GitLab


From be769db2f95861cc8c7c8fedcc71a8c39b803b10 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Sat, 22 Aug 2020 08:23:29 +1000
Subject: [PATCH 0561/1341] net: Get rid of consume_skb when tracing is off

The function consume_skb is only meaningful when tracing is enabled.
This patch makes it conditional on CONFIG_TRACEPOINTS.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/linux/skbuff.h | 9 +++++++++
 net/core/skbuff.c      | 2 ++
 2 files changed, 11 insertions(+)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 46881d9021241..e8bca74857a38 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -1056,7 +1056,16 @@ void kfree_skb(struct sk_buff *skb);
 void kfree_skb_list(struct sk_buff *segs);
 void skb_dump(const char *level, const struct sk_buff *skb, bool full_pkt);
 void skb_tx_error(struct sk_buff *skb);
+
+#ifdef CONFIG_TRACEPOINTS
 void consume_skb(struct sk_buff *skb);
+#else
+static inline void consume_skb(struct sk_buff *skb)
+{
+	return kfree_skb(skb);
+}
+#endif
+
 void __consume_stateless_skb(struct sk_buff *skb);
 void  __kfree_skb(struct sk_buff *skb);
 extern struct kmem_cache *skbuff_head_cache;
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index e18184ffa9c3f..6faf73d6a0f74 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -820,6 +820,7 @@ void skb_tx_error(struct sk_buff *skb)
 }
 EXPORT_SYMBOL(skb_tx_error);
 
+#ifdef CONFIG_TRACEPOINTS
 /**
  *	consume_skb - free an skbuff
  *	@skb: buffer to free
@@ -837,6 +838,7 @@ void consume_skb(struct sk_buff *skb)
 	__kfree_skb(skb);
 }
 EXPORT_SYMBOL(consume_skb);
+#endif
 
 /**
  *	consume_stateless_skb - free an skbuff, assuming it is stateless
-- 
GitLab


From 5978fac03ea3faf793dffeedcbe60dd8da673f89 Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <natechancellor@gmail.com>
Date: Fri, 21 Aug 2020 15:25:16 -0700
Subject: [PATCH 0562/1341] net: dsa: sja1105: Do not use address of compatible
 member in sja1105_check_device_id

Clang warns:

drivers/net/dsa/sja1105/sja1105_main.c:3418:38: warning: address of
array 'match->compatible' will always evaluate to 'true'
[-Wpointer-bool-conversion]
        for (match = sja1105_dt_ids; match->compatible; match++) {
        ~~~                          ~~~~~~~^~~~~~~~~~
1 warning generated.

We should check the value of the first character in compatible to see if
it is empty or not. This matches how the rest of the tree iterates over
IDs.

Fixes: 0b0e299720bb ("net: dsa: sja1105: use detected device id instead of DT one on mismatch")
Link: https://github.com/ClangBuiltLinux/linux/issues/1139
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/dsa/sja1105/sja1105_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c
index c3f6f124e5f01..5a28dfb36ec36 100644
--- a/drivers/net/dsa/sja1105/sja1105_main.c
+++ b/drivers/net/dsa/sja1105/sja1105_main.c
@@ -3415,7 +3415,7 @@ static int sja1105_check_device_id(struct sja1105_private *priv)
 
 	sja1105_unpack(prod_id, &part_no, 19, 4, SJA1105_SIZE_DEVICE_ID);
 
-	for (match = sja1105_dt_ids; match->compatible; match++) {
+	for (match = sja1105_dt_ids; match->compatible[0]; match++) {
 		const struct sja1105_info *info = match->data;
 
 		/* Is what's been probed in our match table at all? */
-- 
GitLab


From d0cac91817c81140957a9b3deb1581e4f908907d Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Sat, 22 Aug 2020 13:11:21 -0700
Subject: [PATCH 0563/1341] MAINTAINERS: GENET: Add missing platform data file

When commit b0ba512e25d7 ("net: bcmgenet: enable driver to work without
a device tree") added include/linux/platform_data/bcmgenet.h, the file
was not added to the GENET MAINTAINERS file section, add it now.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index f0068bceeb615..2bfa6def184b4 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3580,6 +3580,7 @@ L:	bcm-kernel-feedback-list@broadcom.com
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	drivers/net/ethernet/broadcom/genet/
+F:	include/linux/platform_data/bcmgenet.h
 
 BROADCOM IPROC ARM ARCHITECTURE
 M:	Ray Jui <rjui@broadcom.com>
-- 
GitLab


From 9fac261c1eb5db61aad52b9071d6b569ffdabe55 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Sat, 22 Aug 2020 13:11:22 -0700
Subject: [PATCH 0564/1341] MAINTAINERS: B53: Add DT binding file

When the binding was added with 967dd82ffc52 ("net: dsa: b53: Add
support for Broadcom RoboSwitch"), it was not explicitly added to the
B53 MAINTAINERS file section, add it now.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 2bfa6def184b4..8a99fd4f426a3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3388,6 +3388,7 @@ M:	Florian Fainelli <f.fainelli@gmail.com>
 L:	netdev@vger.kernel.org
 L:	openwrt-devel@lists.openwrt.org (subscribers-only)
 S:	Supported
+F:	Documentation/devicetree/bindings/net/dsa/b53.txt
 F:	drivers/net/dsa/b53/*
 F:	include/linux/platform_data/b53.h
 
-- 
GitLab


From f69ccc563df0c2097eb9fdcf80d426a4458835f3 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Sat, 22 Aug 2020 13:11:23 -0700
Subject: [PATCH 0565/1341] MAINTAINERS: GENET: Add DT binding file

When the DT binding was added in aab5127d94e6 ("Documentation: add
Device tree bindings for Broadcom GENET"), the file was not explicitly
listed under the GENET MAINTAINERS section, do that now.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 8a99fd4f426a3..a523ab65f2d44 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3580,6 +3580,7 @@ M:	Florian Fainelli <f.fainelli@gmail.com>
 L:	bcm-kernel-feedback-list@broadcom.com
 L:	netdev@vger.kernel.org
 S:	Supported
+F:	Documentation/devicetree/bindings/net/brcm,bcmgenet.txt
 F:	drivers/net/ethernet/broadcom/genet/
 F:	include/linux/platform_data/bcmgenet.h
 
-- 
GitLab


From ccaab4d3df9879a3d4b930f160b229fa7c2a8477 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Sat, 22 Aug 2020 13:11:24 -0700
Subject: [PATCH 0566/1341] MAINTAINERS: GENET: Add UniMAC MDIO controller
 files

In preparation for removing myself from the PHYLIB entry, add the UniMAC
MDIO controller files (DT binding, driver and platform_data header) to
the GENET entry. The UniMAC MDIO controller is essential to the GENET
operation, therefore it makes sense to group them together.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 MAINTAINERS | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index a523ab65f2d44..31004daf11a9d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3581,8 +3581,11 @@ L:	bcm-kernel-feedback-list@broadcom.com
 L:	netdev@vger.kernel.org
 S:	Supported
 F:	Documentation/devicetree/bindings/net/brcm,bcmgenet.txt
+F:	Documentation/devicetree/bindings/net/brcm,unimac-mdio.txt
 F:	drivers/net/ethernet/broadcom/genet/
+F:	drivers/net/mdio/mdio-bcm-unimac.c
 F:	include/linux/platform_data/bcmgenet.h
+F:	include/linux/platform_data/mdio-bcm-unimac.h
 
 BROADCOM IPROC ARM ARCHITECTURE
 M:	Ray Jui <rjui@broadcom.com>
-- 
GitLab


From e063713c05bc22f11d9e9aac0bc846ca233b9f41 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Sat, 22 Aug 2020 13:11:25 -0700
Subject: [PATCH 0567/1341] MAINTAINERS: Add entry for Broadcom Ethernet PHY
 drivers

Add an entry for the Broadcom Ethernet PHY drivers covering the BCM63xx,
BCM7xxx, BCM87xx, BCM54140, BCM84881, the venerable broadcom.c driver
and the companion library files.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 MAINTAINERS | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 31004daf11a9d..da2206d8c21e2 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -3574,6 +3574,16 @@ L:	bcm-kernel-feedback-list@broadcom.com
 S:	Maintained
 F:	drivers/phy/broadcom/phy-brcm-usb*
 
+BROADCOM ETHERNET PHY DRIVERS
+M:	Florian Fainelli <f.fainelli@gmail.com>
+L:	bcm-kernel-feedback-list@broadcom.com
+L:	netdev@vger.kernel.org
+S:	Supported
+F:	Documentation/devicetree/bindings/net/broadcom-bcm87xx.txt
+F:	drivers/net/phy/bcm*.[ch]
+F:	drivers/net/phy/broadcom.c
+F:	include/linux/brcmphy.h
+
 BROADCOM GENET ETHERNET DRIVER
 M:	Doug Berger <opendmb@gmail.com>
 M:	Florian Fainelli <f.fainelli@gmail.com>
-- 
GitLab


From 3ad1b1e16dbff695f430b7d7ac0b6e98c02065c2 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Sat, 22 Aug 2020 13:11:26 -0700
Subject: [PATCH 0568/1341] MAINTAINERS: Remove self from PHY LIBRARY

My last significant achievements to the PHY library was ensuring we
would have small bus factor by having Andrew and Heiner added. The world
has moved on past 1G, but I have not, so let more competent maintainers
take over.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 MAINTAINERS | 1 -
 1 file changed, 1 deletion(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index da2206d8c21e2..f8b2991b45eeb 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6510,7 +6510,6 @@ F:	net/bridge/
 
 ETHERNET PHY LIBRARY
 M:	Andrew Lunn <andrew@lunn.ch>
-M:	Florian Fainelli <f.fainelli@gmail.com>
 M:	Heiner Kallweit <hkallweit1@gmail.com>
 R:	Russell King <linux@armlinux.org.uk>
 L:	netdev@vger.kernel.org
-- 
GitLab


From 94dea151bf3651c01acb12a38ca75ba9d26ea4da Mon Sep 17 00:00:00 2001
From: Marta Rybczynska <rybczynska@gmail.com>
Date: Sun, 26 Jul 2020 20:54:40 +0200
Subject: [PATCH 0569/1341] Documentation/locking/locktypes: fix local_locks
 documentation

Fix issues with local_locks documentation:
- fix function names, local_lock.h has local_unlock_irqrestore(),
not local_lock_irqrestore()
- fix mapping table, local_unlock_irqrestore() maps to local_irq_restore(),
not _save()

Signed-off-by: Marta Rybczynska <rybczynska@gmail.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/CAApg2=SKxQ3Sqwj6TZnV-0x0cKLXFKDaPvXT4N15MPDMKq724g@mail.gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/locking/locktypes.rst | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/Documentation/locking/locktypes.rst b/Documentation/locking/locktypes.rst
index 4cefed8048ca4..ddada4a537493 100644
--- a/Documentation/locking/locktypes.rst
+++ b/Documentation/locking/locktypes.rst
@@ -164,14 +164,14 @@ by disabling preemption or interrupts.
 On non-PREEMPT_RT kernels local_lock operations map to the preemption and
 interrupt disabling and enabling primitives:
 
- =========================== ======================
- local_lock(&llock)          preempt_disable()
- local_unlock(&llock)        preempt_enable()
- local_lock_irq(&llock)      local_irq_disable()
- local_unlock_irq(&llock)    local_irq_enable()
- local_lock_save(&llock)     local_irq_save()
- local_lock_restore(&llock)  local_irq_save()
- =========================== ======================
+ ===============================  ======================
+ local_lock(&llock)               preempt_disable()
+ local_unlock(&llock)             preempt_enable()
+ local_lock_irq(&llock)           local_irq_disable()
+ local_unlock_irq(&llock)         local_irq_enable()
+ local_lock_irqsave(&llock)       local_irq_save()
+ local_unlock_irqrestore(&llock)  local_irq_restore()
+ ===============================  ======================
 
 The named scope of local_lock has two advantages over the regular
 primitives:
@@ -353,14 +353,14 @@ protection scope. So the following substitution is wrong::
   {
     local_irq_save(flags);    -> local_lock_irqsave(&local_lock_1, flags);
     func3();
-    local_irq_restore(flags); -> local_lock_irqrestore(&local_lock_1, flags);
+    local_irq_restore(flags); -> local_unlock_irqrestore(&local_lock_1, flags);
   }
 
   func2()
   {
     local_irq_save(flags);    -> local_lock_irqsave(&local_lock_2, flags);
     func3();
-    local_irq_restore(flags); -> local_lock_irqrestore(&local_lock_2, flags);
+    local_irq_restore(flags); -> local_unlock_irqrestore(&local_lock_2, flags);
   }
 
   func3()
@@ -379,14 +379,14 @@ PREEMPT_RT-specific semantics of spinlock_t. The correct substitution is::
   {
     local_irq_save(flags);    -> local_lock_irqsave(&local_lock, flags);
     func3();
-    local_irq_restore(flags); -> local_lock_irqrestore(&local_lock, flags);
+    local_irq_restore(flags); -> local_unlock_irqrestore(&local_lock, flags);
   }
 
   func2()
   {
     local_irq_save(flags);    -> local_lock_irqsave(&local_lock, flags);
     func3();
-    local_irq_restore(flags); -> local_lock_irqrestore(&local_lock, flags);
+    local_irq_restore(flags); -> local_unlock_irqrestore(&local_lock, flags);
   }
 
   func3()
-- 
GitLab


From a320274a09da0200802bfc54cbb283a8fa4a73be Mon Sep 17 00:00:00 2001
From: Puranjay Mohan <puranjay12@gmail.com>
Date: Wed, 12 Aug 2020 23:16:11 +0530
Subject: [PATCH 0570/1341] IIO: Documentation: Replace deprecated :c:func:
 Usage

Replace :c:func: with func() as the previous usage is deprecated.

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Link: https://lore.kernel.org/r/20200812174611.18580-1-puranjay12@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/driver-api/iio/core.rst | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/Documentation/driver-api/iio/core.rst b/Documentation/driver-api/iio/core.rst
index b0bc0c028cc50..51b21e0023961 100644
--- a/Documentation/driver-api/iio/core.rst
+++ b/Documentation/driver-api/iio/core.rst
@@ -11,10 +11,10 @@ Industrial I/O Devices
 ----------------------
 
 * struct :c:type:`iio_dev` - industrial I/O device
-* :c:func:`iio_device_alloc()` - allocate an :c:type:`iio_dev` from a driver
-* :c:func:`iio_device_free()` - free an :c:type:`iio_dev` from a driver
-* :c:func:`iio_device_register()` - register a device with the IIO subsystem
-* :c:func:`iio_device_unregister()` - unregister a device from the IIO
+* iio_device_alloc() - allocate an :c:type:`iio_dev` from a driver
+* iio_device_free() - free an :c:type:`iio_dev` from a driver
+* iio_device_register() - register a device with the IIO subsystem
+* iio_device_unregister() - unregister a device from the IIO
   subsystem
 
 An IIO device usually corresponds to a single hardware sensor and it
@@ -34,17 +34,17 @@ A typical IIO driver will register itself as an :doc:`I2C <../i2c>` or
 
 At probe:
 
-1. Call :c:func:`iio_device_alloc()`, which allocates memory for an IIO device.
+1. Call iio_device_alloc(), which allocates memory for an IIO device.
 2. Initialize IIO device fields with driver specific information (e.g.
    device name, device channels).
-3. Call :c:func:`iio_device_register()`, this registers the device with the
+3. Call iio_device_register(), this registers the device with the
    IIO core. After this call the device is ready to accept requests from user
    space applications.
 
 At remove, we free the resources allocated in probe in reverse order:
 
-1. :c:func:`iio_device_unregister()`, unregister the device from the IIO core.
-2. :c:func:`iio_device_free()`, free the memory allocated for the IIO device.
+1. iio_device_unregister(), unregister the device from the IIO core.
+2. iio_device_free(), free the memory allocated for the IIO device.
 
 IIO device sysfs interface
 ==========================
-- 
GitLab


From 78b8612e7fce1a17c65d6f5070c2994ce4e28968 Mon Sep 17 00:00:00 2001
From: Puranjay Mohan <puranjay12@gmail.com>
Date: Wed, 12 Aug 2020 23:32:24 +0530
Subject: [PATCH 0571/1341] Fpga: Documentation: Replace deprecated :c:func:
 Usage

Replace :c:func: with func() as the previous usage is deprecated.

Signed-off-by: Puranjay Mohan <puranjay12@gmail.com>
Link: https://lore.kernel.org/r/20200812180224.24810-1-puranjay12@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/driver-api/fpga/fpga-bridge.rst  |  6 +++---
 Documentation/driver-api/fpga/fpga-mgr.rst     |  6 +++---
 .../driver-api/fpga/fpga-programming.rst       | 16 ++++++++--------
 Documentation/driver-api/fpga/fpga-region.rst  | 18 +++++++++---------
 4 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/Documentation/driver-api/fpga/fpga-bridge.rst b/Documentation/driver-api/fpga/fpga-bridge.rst
index 71c5a40da3203..ccd677ba7d769 100644
--- a/Documentation/driver-api/fpga/fpga-bridge.rst
+++ b/Documentation/driver-api/fpga/fpga-bridge.rst
@@ -6,9 +6,9 @@ API to implement a new FPGA bridge
 
 * struct :c:type:`fpga_bridge` — The FPGA Bridge structure
 * struct :c:type:`fpga_bridge_ops` — Low level Bridge driver ops
-* :c:func:`devm_fpga_bridge_create()` — Allocate and init a bridge struct
-* :c:func:`fpga_bridge_register()` — Register a bridge
-* :c:func:`fpga_bridge_unregister()` — Unregister a bridge
+* devm_fpga_bridge_create() — Allocate and init a bridge struct
+* fpga_bridge_register() — Register a bridge
+* fpga_bridge_unregister() — Unregister a bridge
 
 .. kernel-doc:: include/linux/fpga/fpga-bridge.h
    :functions: fpga_bridge
diff --git a/Documentation/driver-api/fpga/fpga-mgr.rst b/Documentation/driver-api/fpga/fpga-mgr.rst
index 576f1945eacd9..af5382af1379b 100644
--- a/Documentation/driver-api/fpga/fpga-mgr.rst
+++ b/Documentation/driver-api/fpga/fpga-mgr.rst
@@ -104,9 +104,9 @@ API for implementing a new FPGA Manager driver
 * ``fpga_mgr_states`` —  Values for :c:member:`fpga_manager->state`.
 * struct :c:type:`fpga_manager` —  the FPGA manager struct
 * struct :c:type:`fpga_manager_ops` —  Low level FPGA manager driver ops
-* :c:func:`devm_fpga_mgr_create` —  Allocate and init a manager struct
-* :c:func:`fpga_mgr_register` —  Register an FPGA manager
-* :c:func:`fpga_mgr_unregister` —  Unregister an FPGA manager
+* devm_fpga_mgr_create() —  Allocate and init a manager struct
+* fpga_mgr_register() —  Register an FPGA manager
+* fpga_mgr_unregister() —  Unregister an FPGA manager
 
 .. kernel-doc:: include/linux/fpga/fpga-mgr.h
    :functions: fpga_mgr_states
diff --git a/Documentation/driver-api/fpga/fpga-programming.rst b/Documentation/driver-api/fpga/fpga-programming.rst
index b5484df6ff0f5..f487ad64dfb98 100644
--- a/Documentation/driver-api/fpga/fpga-programming.rst
+++ b/Documentation/driver-api/fpga/fpga-programming.rst
@@ -6,9 +6,9 @@ Overview
 
 The in-kernel API for FPGA programming is a combination of APIs from
 FPGA manager, bridge, and regions.  The actual function used to
-trigger FPGA programming is :c:func:`fpga_region_program_fpga()`.
+trigger FPGA programming is fpga_region_program_fpga().
 
-:c:func:`fpga_region_program_fpga()` uses functionality supplied by
+fpga_region_program_fpga() uses functionality supplied by
 the FPGA manager and bridges.  It will:
 
  * lock the region's mutex
@@ -20,8 +20,8 @@ the FPGA manager and bridges.  It will:
  * release the locks
 
 The struct fpga_image_info specifies what FPGA image to program.  It is
-allocated/freed by :c:func:`fpga_image_info_alloc()` and freed with
-:c:func:`fpga_image_info_free()`
+allocated/freed by fpga_image_info_alloc() and freed with
+fpga_image_info_free()
 
 How to program an FPGA using a region
 -------------------------------------
@@ -84,10 +84,10 @@ will generate that list.  Here's some sample code of what to do next::
 API for programming an FPGA
 ---------------------------
 
-* :c:func:`fpga_region_program_fpga` —  Program an FPGA
-* :c:type:`fpga_image_info` —  Specifies what FPGA image to program
-* :c:func:`fpga_image_info_alloc()` —  Allocate an FPGA image info struct
-* :c:func:`fpga_image_info_free()` —  Free an FPGA image info struct
+* fpga_region_program_fpga() —  Program an FPGA
+* fpga_image_info() —  Specifies what FPGA image to program
+* fpga_image_info_alloc() —  Allocate an FPGA image info struct
+* fpga_image_info_free() —  Free an FPGA image info struct
 
 .. kernel-doc:: drivers/fpga/fpga-region.c
    :functions: fpga_region_program_fpga
diff --git a/Documentation/driver-api/fpga/fpga-region.rst b/Documentation/driver-api/fpga/fpga-region.rst
index 0529b2d2231a7..31118a8ba218f 100644
--- a/Documentation/driver-api/fpga/fpga-region.rst
+++ b/Documentation/driver-api/fpga/fpga-region.rst
@@ -46,18 +46,18 @@ API to add a new FPGA region
 ----------------------------
 
 * struct :c:type:`fpga_region` — The FPGA region struct
-* :c:func:`devm_fpga_region_create` — Allocate and init a region struct
-* :c:func:`fpga_region_register` —  Register an FPGA region
-* :c:func:`fpga_region_unregister` —  Unregister an FPGA region
+* devm_fpga_region_create() — Allocate and init a region struct
+* fpga_region_register() —  Register an FPGA region
+* fpga_region_unregister() —  Unregister an FPGA region
 
 The FPGA region's probe function will need to get a reference to the FPGA
 Manager it will be using to do the programming.  This usually would happen
 during the region's probe function.
 
-* :c:func:`fpga_mgr_get` — Get a reference to an FPGA manager, raise ref count
-* :c:func:`of_fpga_mgr_get` —  Get a reference to an FPGA manager, raise ref count,
+* fpga_mgr_get() — Get a reference to an FPGA manager, raise ref count
+* of_fpga_mgr_get() —  Get a reference to an FPGA manager, raise ref count,
   given a device node.
-* :c:func:`fpga_mgr_put` — Put an FPGA manager
+* fpga_mgr_put() — Put an FPGA manager
 
 The FPGA region will need to specify which bridges to control while programming
 the FPGA.  The region driver can build a list of bridges during probe time
@@ -66,11 +66,11 @@ the list of bridges to program just before programming
 (:c:member:`fpga_region->get_bridges`).  The FPGA bridge framework supplies the
 following APIs to handle building or tearing down that list.
 
-* :c:func:`fpga_bridge_get_to_list` — Get a ref of an FPGA bridge, add it to a
+* fpga_bridge_get_to_list() — Get a ref of an FPGA bridge, add it to a
   list
-* :c:func:`of_fpga_bridge_get_to_list` — Get a ref of an FPGA bridge, add it to a
+* of_fpga_bridge_get_to_list() — Get a ref of an FPGA bridge, add it to a
   list, given a device node
-* :c:func:`fpga_bridges_put` — Given a list of bridges, put them
+* fpga_bridges_put() — Given a list of bridges, put them
 
 .. kernel-doc:: include/linux/fpga/fpga-region.h
    :functions: fpga_region
-- 
GitLab


From fb08f4a6a3139dc1b7ca5ed312ced2b60ec1a362 Mon Sep 17 00:00:00 2001
From: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Date: Sat, 15 Aug 2020 12:26:58 +0200
Subject: [PATCH 0572/1341] MAINTAINERS: mention documentation maintainer entry
 profile

Since commit 53b7f3aa411b ("Add a maintainer entry profile for
documentation"), the documentation "subsystem" has a maintainer entry
profile, and it deserves to be mentioned in MAINTAINERS with a suitable
P: entry.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20200815102658.12236-1-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index deaafb617361c..06d0315b23ee8 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5239,6 +5239,7 @@ DOCUMENTATION
 M:	Jonathan Corbet <corbet@lwn.net>
 L:	linux-doc@vger.kernel.org
 S:	Maintained
+P:	Documentation/doc-guide/maintainer-profile.rst
 T:	git git://git.lwn.net/linux.git docs-next
 F:	Documentation/
 F:	scripts/documentation-file-ref-check
-- 
GitLab


From 003ad49f74003aaa95992fe17028512d58977d07 Mon Sep 17 00:00:00 2001
From: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Date: Sat, 15 Aug 2020 13:57:28 +0200
Subject: [PATCH 0573/1341] Documentation: add riscv entry in list of existing
 profiles

As long as there are only a few maintainer entry profiles, i.e., three
in v5.8, continue to maintain a complete a list of entries in the
maintainer handbook.

Complete the list by adding the RISC-V ARCHITECTURE maintainer entry
profile found in MAINTAINERS.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Link: https://lore.kernel.org/r/20200815115728.15128-1-lukas.bulwahn@gmail.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/maintainer/maintainer-entry-profile.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/maintainer/maintainer-entry-profile.rst b/Documentation/maintainer/maintainer-entry-profile.rst
index 227f427118e81..b7a627d6c97dc 100644
--- a/Documentation/maintainer/maintainer-entry-profile.rst
+++ b/Documentation/maintainer/maintainer-entry-profile.rst
@@ -101,3 +101,4 @@ to do something different in the near future.
 
    ../doc-guide/maintainer-profile
    ../nvdimm/maintainer-entry-profile
+   ../riscv/patch-acceptance
-- 
GitLab


From 15ab85695595fbaba1ccccd07f7b0cede57cccf2 Mon Sep 17 00:00:00 2001
From: Theodore Dubois <tblodt@icloud.com>
Date: Sun, 16 Aug 2020 16:38:23 -0700
Subject: [PATCH 0574/1341] devices.txt: fix typo of "ubd" as "udb"

Signed-off-by: Theodore Dubois <tblodt@icloud.com>
Link: https://lore.kernel.org/r/20200816233823.86316-1-tblodt@icloud.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/admin-guide/devices.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/devices.txt b/Documentation/admin-guide/devices.txt
index d336f3f73a4c1..63fd4e6a014bc 100644
--- a/Documentation/admin-guide/devices.txt
+++ b/Documentation/admin-guide/devices.txt
@@ -1662,7 +1662,7 @@
 
   98 block	User-mode virtual block device
 		  0 = /dev/ubda		First user-mode block device
-		 16 = /dev/udbb		Second user-mode block device
+		 16 = /dev/ubdb		Second user-mode block device
 		    ...
 
 		Partitions are handled in the same way as for IDE
-- 
GitLab


From 053f8fc7c1c8f70e30a89955f8fd53e1e48dee58 Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Mon, 17 Aug 2020 16:32:07 -0700
Subject: [PATCH 0575/1341] docs: Fix function name trailing double-()s

I noticed a double-() in the deprecated.rst rendering today. Fix that
one and two others in the Documentation/ tree.

Acked-by: "Paul E. McKenney" <paulmck@kernel.org> # For RCU
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20200817233207.4083538-1-keescook@chromium.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/RCU/lockdep.rst                           | 2 +-
 Documentation/process/deprecated.rst                    | 2 +-
 Documentation/translations/it_IT/process/deprecated.rst | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/RCU/lockdep.rst b/Documentation/RCU/lockdep.rst
index f1fc8ae3846a4..cc860a0c296be 100644
--- a/Documentation/RCU/lockdep.rst
+++ b/Documentation/RCU/lockdep.rst
@@ -49,7 +49,7 @@ checking of rcu_dereference() primitives:
 		is invoked by both RCU-sched readers and updaters.
 	srcu_dereference_check(p, c):
 		Use explicit check expression "c" along with
-		srcu_read_lock_held()().  This is useful in code that
+		srcu_read_lock_held().  This is useful in code that
 		is invoked by both SRCU readers and updaters.
 	rcu_dereference_raw(p):
 		Don't check.  (Use sparingly, if at all.)
diff --git a/Documentation/process/deprecated.rst b/Documentation/process/deprecated.rst
index 4a9aa4f0681e5..918e32d76fc44 100644
--- a/Documentation/process/deprecated.rst
+++ b/Documentation/process/deprecated.rst
@@ -142,7 +142,7 @@ only NUL-terminated strings. The safe replacement is strscpy().
 (Users of strscpy() still needing NUL-padding should instead
 use strscpy_pad().)
 
-If a caller is using non-NUL-terminated strings, strncpy()() can
+If a caller is using non-NUL-terminated strings, strncpy() can
 still be used, but destinations should be marked with the `__nonstring
 <https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html>`_
 attribute to avoid future compiler warnings.
diff --git a/Documentation/translations/it_IT/process/deprecated.rst b/Documentation/translations/it_IT/process/deprecated.rst
index e108eaf82cf67..a642ff3fdc8bb 100644
--- a/Documentation/translations/it_IT/process/deprecated.rst
+++ b/Documentation/translations/it_IT/process/deprecated.rst
@@ -130,7 +130,7 @@ chi usa solo stringe terminate. La versione sicura da usare è
 strscpy(). (chi usa strscpy() e necessita di estendere la
 terminazione con NUL deve aggiungere una chiamata a memset())
 
-Se il chiamate no usa stringhe terminate con NUL, allore strncpy()()
+Se il chiamate no usa stringhe terminate con NUL, allore strncpy()
 può continuare ad essere usata, ma i buffer di destinazione devono essere
 marchiati con l'attributo `__nonstring <https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html>`_
 per evitare avvisi durante la compilazione.
-- 
GitLab


From 4776b9e332441b49f0c20f1ea56ccb187b375ce0 Mon Sep 17 00:00:00 2001
From: Brandon Jiang <brandon.jiang.a@outlook.com>
Date: Sat, 22 Aug 2020 15:46:40 +0800
Subject: [PATCH 0576/1341] Documentation: fix typo for abituguru documentation

Typo fix for abituguru,abituguru3 and abituguru-datasheet

Signed-off-by: Brandon Jiang <brandon.jiang.a@outlook.com>
Link: https://lore.kernel.org/r/DM5PR22MB0892E4FEFCA9ED055B0A8E71AC580@DM5PR22MB0892.namprd22.prod.outlook.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/hwmon/abituguru-datasheet.rst | 6 +++---
 Documentation/hwmon/abituguru.rst           | 4 ++--
 Documentation/hwmon/abituguru3.rst          | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/Documentation/hwmon/abituguru-datasheet.rst b/Documentation/hwmon/abituguru-datasheet.rst
index 6d5253e2223ba..0cd61471d2a22 100644
--- a/Documentation/hwmon/abituguru-datasheet.rst
+++ b/Documentation/hwmon/abituguru-datasheet.rst
@@ -68,7 +68,7 @@ See below for all known bank addresses, numbers of sensors in that bank,
 number of bytes data per sensor and contents/meaning of those bytes.
 
 Although both this document and the kernel driver have kept the sensor
-terminoligy for the addressing within a bank this is not 100% correct, in
+terminology for the addressing within a bank this is not 100% correct, in
 bank 0x24 for example the addressing within the bank selects a PWM output not
 a sensor.
 
@@ -155,7 +155,7 @@ After wider testing of the Linux kernel driver some variants of the uGuru have
 turned up which do not hold 0x08 at DATA within 250 reads after writing the
 bank address. With these versions this happens quite frequent, using larger
 timeouts doesn't help, they just go offline for a second or 2, doing some
-internal callibration or whatever. Your code should be prepared to handle
+internal calibration or whatever. Your code should be prepared to handle
 this and in case of no response in this specific case just goto sleep for a
 while and then retry.
 
@@ -331,6 +331,6 @@ the voltage / clock programming out, I tried reading and only reading banks
 0-0x30 with the reading code used for the sensor banks (0x20-0x28) and this
 resulted in a _permanent_ reprogramming of the voltages, luckily I had the
 sensors part configured so that it would shutdown my system on any out of spec
-voltages which proprably safed my computer (after a reboot I managed to
+voltages which probably safed my computer (after a reboot I managed to
 immediately enter the bios and reload the defaults). This probably means that
 the read/write cycle for the non sensor part is different from the sensor part.
diff --git a/Documentation/hwmon/abituguru.rst b/Documentation/hwmon/abituguru.rst
index d8243c827de99..cfda60b757ce5 100644
--- a/Documentation/hwmon/abituguru.rst
+++ b/Documentation/hwmon/abituguru.rst
@@ -17,7 +17,7 @@ Supported chips:
     Note:
 	The uGuru is a microcontroller with onboard firmware which programs
 	it to behave as a hwmon IC. There are many different revisions of the
-	firmware and thus effectivly many different revisions of the uGuru.
+	firmware and thus effectively many different revisions of the uGuru.
 	Below is an incomplete list with which revisions are used for which
 	Motherboards:
 
@@ -33,7 +33,7 @@ Supported chips:
 	sensortype (Volt or Temp) for bank1 sensors, for revision 1 uGuru's
 	this does not always work. For these uGuru's the autodetection can
 	be overridden with the bank1_types module param. For all 3 known
-	revison 1 motherboards the correct use of this param is:
+	revision 1 motherboards the correct use of this param is:
 	bank1_types=1,1,0,0,0,0,0,2,0,0,0,0,2,0,0,1
 	You may also need to specify the fan_sensors option for these boards
 	fan_sensors=5
diff --git a/Documentation/hwmon/abituguru3.rst b/Documentation/hwmon/abituguru3.rst
index 514f11f41e8b5..88046d8663857 100644
--- a/Documentation/hwmon/abituguru3.rst
+++ b/Documentation/hwmon/abituguru3.rst
@@ -13,7 +13,7 @@ Supported chips:
     Note:
 	The uGuru is a microcontroller with onboard firmware which programs
 	it to behave as a hwmon IC. There are many different revisions of the
-	firmware and thus effectivly many different revisions of the uGuru.
+	firmware and thus effectively many different revisions of the uGuru.
 	Below is an incomplete list with which revisions are used for which
 	Motherboards:
 
@@ -24,7 +24,7 @@ Supported chips:
 	- uGuru 3.0.0.0 ~ 3.0.x.x (AW8, AL8, AT8, NI8 SLI, AT8 32X, AN8 32X,
 	  AW9D-MAX)
 
-	The abituguru3 driver is only for revison 3.0.x.x motherboards,
+	The abituguru3 driver is only for revision 3.0.x.x motherboards,
 	this driver will not work on older motherboards. For older
 	motherboards use the abituguru (without the 3 !) driver.
 
-- 
GitLab


From 92001bc0365a144783f8f3108be94e74baf61011 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Sun, 23 Aug 2020 15:55:16 -0700
Subject: [PATCH 0577/1341] Documentation: laptops: thinkpad-acpi: fix
 underline length build warning

Fix underline length build warning in thinkpad-acpi.rst documentation:

Documentation/admin-guide/laptops/thinkpad-acpi.rst:1437: WARNING: Title underline too short.
DYTC Lapmode sensor
------------------

Fixes: acf7f4a59114 ("platform/x86: thinkpad_acpi: lap or desk mode interface")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://lore.kernel.org/r/7b2ecef9-dfb7-808a-7c05-4e4f44b363c4@infradead.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
---
 Documentation/admin-guide/laptops/thinkpad-acpi.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/laptops/thinkpad-acpi.rst b/Documentation/admin-guide/laptops/thinkpad-acpi.rst
index 5e477869df182..5fe1ade88c177 100644
--- a/Documentation/admin-guide/laptops/thinkpad-acpi.rst
+++ b/Documentation/admin-guide/laptops/thinkpad-acpi.rst
@@ -1434,7 +1434,7 @@ on the feature, restricting the viewing angles.
 
 
 DYTC Lapmode sensor
-------------------
+-------------------
 
 sysfs: dytc_lapmode
 
-- 
GitLab


From f97c04c316d8fea16dca449fdfbe101fbdfee6a2 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Sun, 23 Aug 2020 15:23:43 +0800
Subject: [PATCH 0578/1341] NFC: st95hf: Fix memleak in st95hf_in_send_cmd

When down_killable() fails, skb_resp should be freed
just like when st95hf_spi_send() fails.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/nfc/st95hf/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nfc/st95hf/core.c b/drivers/nfc/st95hf/core.c
index 9642971e89cea..4578547659839 100644
--- a/drivers/nfc/st95hf/core.c
+++ b/drivers/nfc/st95hf/core.c
@@ -966,7 +966,7 @@ static int st95hf_in_send_cmd(struct nfc_digital_dev *ddev,
 	rc = down_killable(&stcontext->exchange_lock);
 	if (rc) {
 		WARN(1, "Semaphore is not found up in st95hf_in_send_cmd\n");
-		return rc;
+		goto free_skb_resp;
 	}
 
 	rc = st95hf_spi_send(&stcontext->spicontext, skb->data,
-- 
GitLab


From e2d79cd8875fa8c3cc7defa98a8cc99a1ed0c62f Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Sun, 23 Aug 2020 16:56:47 +0800
Subject: [PATCH 0579/1341] net: arc_emac: Fix memleak in arc_mdio_probe

When devm_gpiod_get_optional() fails, bus should be
freed just like when of_mdiobus_register() fails.

Fixes: 1bddd96cba03d ("net: arc_emac: support the phy reset for emac driver")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/arc/emac_mdio.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/arc/emac_mdio.c b/drivers/net/ethernet/arc/emac_mdio.c
index 0187dbf3b87df..54cdafdd067db 100644
--- a/drivers/net/ethernet/arc/emac_mdio.c
+++ b/drivers/net/ethernet/arc/emac_mdio.c
@@ -153,6 +153,7 @@ int arc_mdio_probe(struct arc_emac_priv *priv)
 	if (IS_ERR(data->reset_gpio)) {
 		error = PTR_ERR(data->reset_gpio);
 		dev_err(priv->dev, "Failed to request gpio: %d\n", error);
+		mdiobus_free(bus);
 		return error;
 	}
 
-- 
GitLab


From 15ac5cdafb9202424206dc5bd376437a358963f9 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Sun, 23 Aug 2020 19:29:35 +0800
Subject: [PATCH 0580/1341] firestream: Fix memleak in fs_open

When make_rate() fails, vcc should be freed just
like other error paths in fs_open().

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/atm/firestream.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/atm/firestream.c b/drivers/atm/firestream.c
index 2ca9ec8027342..510250cf5c876 100644
--- a/drivers/atm/firestream.c
+++ b/drivers/atm/firestream.c
@@ -998,6 +998,7 @@ static int fs_open(struct atm_vcc *atm_vcc)
 				error = make_rate (pcr, r, &tmc0, NULL);
 				if (error) {
 					kfree(tc);
+					kfree(vcc);
 					return error;
 				}
 			}
-- 
GitLab


From 4341b7d9164093c14edc686deac6a9f36eb661b5 Mon Sep 17 00:00:00 2001
From: Kurt Kanzenbach <kurt@kmk-computers.de>
Date: Sun, 23 Aug 2020 14:18:36 +0200
Subject: [PATCH 0581/1341] dt-bindings: net: dsa: Fix typo

Fix spelling mistake documenation -> documentation.

Fixes: 5a18bb14c0f7 ("dt-bindings: net: dsa: Let dsa.txt refer to dsa.yaml")
Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 Documentation/devicetree/bindings/net/dsa/dsa.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/net/dsa/dsa.txt b/Documentation/devicetree/bindings/net/dsa/dsa.txt
index bf7328aba3305..dab208b5c7c7e 100644
--- a/Documentation/devicetree/bindings/net/dsa/dsa.txt
+++ b/Documentation/devicetree/bindings/net/dsa/dsa.txt
@@ -1,4 +1,4 @@
 Distributed Switch Architecture Device Tree Bindings
 ----------------------------------------------------
 
-See Documentation/devicetree/bindings/net/dsa/dsa.yaml for the documenation.
+See Documentation/devicetree/bindings/net/dsa/dsa.yaml for the documentation.
-- 
GitLab


From 59ebb4305c432b6ca34fd9704c9294c1f16e5847 Mon Sep 17 00:00:00 2001
From: Sumera Priyadarsini <sylphrenadin@gmail.com>
Date: Sun, 23 Aug 2020 19:22:45 +0530
Subject: [PATCH 0582/1341] net: ocelot: Add of_node_put() before return
 statement

Every iteration of for_each_available_child_of_node() decrements
the reference count of the previous node, however when control
is transferred from the middle of the loop, as in the case of
a return or break or goto, there is no decrement thus ultimately
resulting in a memory leak.

Fix a potential memory leak in felix.c by inserting of_node_put()
before the return statement.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/dsa/ocelot/felix.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/dsa/ocelot/felix.c b/drivers/net/dsa/ocelot/felix.c
index c69d9592a2b79..04bfa6e465ffd 100644
--- a/drivers/net/dsa/ocelot/felix.c
+++ b/drivers/net/dsa/ocelot/felix.c
@@ -400,6 +400,7 @@ static int felix_parse_ports_node(struct felix *felix,
 		if (err < 0) {
 			dev_err(dev, "Unsupported PHY mode %s on port %d\n",
 				phy_modes(phy_mode), port);
+			of_node_put(child);
 			return err;
 		}
 
-- 
GitLab


From 966b8266a4629a84042f8c237d767d133c456a10 Mon Sep 17 00:00:00 2001
From: Edward Cree <ecree@solarflare.com>
Date: Mon, 24 Aug 2020 16:18:51 +0100
Subject: [PATCH 0583/1341] sfc: fix boolreturn.cocci warning and rename
 function

check_fcs() was returning bool as 0/1, which was a sign that the sense
 of the function was unclear: false was good, which doesn't really match
 a name like 'check_$thing'.  So rename it to ef100_has_fcs_error(), and
 use proper booleans in the return statements.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/sfc/ef100_rx.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/sfc/ef100_rx.c b/drivers/net/ethernet/sfc/ef100_rx.c
index 012925e878f4e..85207acf7dee9 100644
--- a/drivers/net/ethernet/sfc/ef100_rx.c
+++ b/drivers/net/ethernet/sfc/ef100_rx.c
@@ -36,7 +36,7 @@ bool ef100_rx_buf_hash_valid(const u8 *prefix)
 	return PREFIX_FIELD(prefix, RSS_HASH_VALID);
 }
 
-static bool check_fcs(struct efx_channel *channel, u32 *prefix)
+static bool ef100_has_fcs_error(struct efx_channel *channel, u32 *prefix)
 {
 	u16 rxclass;
 	u8 l2status;
@@ -46,11 +46,11 @@ static bool check_fcs(struct efx_channel *channel, u32 *prefix)
 
 	if (likely(l2status == ESE_GZ_RH_HCLASS_L2_STATUS_OK))
 		/* Everything is ok */
-		return 0;
+		return false;
 
 	if (l2status == ESE_GZ_RH_HCLASS_L2_STATUS_FCS_ERR)
 		channel->n_rx_eth_crc_err++;
-	return 1;
+	return true;
 }
 
 void __ef100_rx_packet(struct efx_channel *channel)
@@ -63,7 +63,7 @@ void __ef100_rx_packet(struct efx_channel *channel)
 
 	prefix = (u32 *)(eh - ESE_GZ_RX_PKT_PREFIX_LEN);
 
-	if (check_fcs(channel, prefix) &&
+	if (ef100_has_fcs_error(channel, prefix) &&
 	    unlikely(!(efx->net_dev->features & NETIF_F_RXALL)))
 		goto out;
 
-- 
GitLab


From f308a35f547cd7c1d8a901c12b3ac508e96df665 Mon Sep 17 00:00:00 2001
From: Ye Bin <yebin10@huawei.com>
Date: Mon, 24 Aug 2020 11:34:36 +0800
Subject: [PATCH 0584/1341] scsi: qedf: Fix null ptr reference in
 qedf_stag_change_work

Link: https://lore.kernel.org/r/20200824033436.45570-1-yebin10@huawei.com
Acked-by: Saurav Kashyap <skashyap@marvell.com>
Signed-off-by: Ye Bin <yebin10@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qedf/qedf_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/qedf/qedf_main.c b/drivers/scsi/qedf/qedf_main.c
index 3f04f2c813663..5ca424df355c1 100644
--- a/drivers/scsi/qedf/qedf_main.c
+++ b/drivers/scsi/qedf/qedf_main.c
@@ -3863,7 +3863,7 @@ void qedf_stag_change_work(struct work_struct *work)
 	    container_of(work, struct qedf_ctx, stag_work.work);
 
 	if (!qedf) {
-		QEDF_ERR(&qedf->dbg_ctx, "qedf is NULL");
+		QEDF_ERR(NULL, "qedf is NULL");
 		return;
 	}
 	QEDF_ERR(&qedf->dbg_ctx, "Performing software context reset.\n");
-- 
GitLab


From 38660389a7697ae6dd56edfac5d87754374f217a Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Mon, 24 Aug 2020 11:59:33 +0300
Subject: [PATCH 0585/1341] scsi: libcxgbi: Fix a use after free in
 cxgbi_conn_xmit_pdu()

We accidentally move this logging printk after the free, but that leads to
a use after free.

Link: https://lore.kernel.org/r/20200824085933.GD208317@mwanda
Fixes: e33c2482289b ("scsi: cxgb4i: Add support for iSCSI segmentation offload")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/cxgbi/libcxgbi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/cxgbi/libcxgbi.c b/drivers/scsi/cxgbi/libcxgbi.c
index 71aebaf533ea5..0e8621a6956dc 100644
--- a/drivers/scsi/cxgbi/libcxgbi.c
+++ b/drivers/scsi/cxgbi/libcxgbi.c
@@ -2457,10 +2457,10 @@ int cxgbi_conn_xmit_pdu(struct iscsi_task *task)
 		return err;
 	}
 
-	__kfree_skb(skb);
 	log_debug(1 << CXGBI_DBG_ISCSI | 1 << CXGBI_DBG_PDU_TX,
 		  "itt 0x%x, skb 0x%p, len %u/%u, xmit err %d.\n",
 		  task->itt, skb, skb->len, skb->data_len, err);
+	__kfree_skb(skb);
 	iscsi_conn_printk(KERN_ERR, task->conn, "xmit err %d.\n", err);
 	iscsi_conn_failure(task->conn, ISCSI_ERR_XMIT_FAILED);
 	return err;
-- 
GitLab


From 75d46c6d15efabc5176a5e2694ee236f02ee72ef Mon Sep 17 00:00:00 2001
From: Niklas Cassel <niklas.cassel@wdc.com>
Date: Fri, 21 Aug 2020 15:00:07 +0200
Subject: [PATCH 0586/1341] scsi: scsi_debug: Remove superfluous close zone in
 resp_open_zone()

resp_open_zone() always calls zbc_open_zone() with parameter explicit set
to true.

If zbc_open_zone() is called with parameter explicit set to true, and the
current zone state is implicit open, it will call zbc_close_zone() on the
zone before proceeding.

Therefore, there is no need for resp_open_zone() to call zbc_close_zone()
on an implicitly open zone before calling zbc_open_zone().

Remove superfluous close zone in resp_open_zone().

Link: https://lore.kernel.org/r/20200821130007.39938-1-niklas.cassel@wdc.com
Reviewed-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/scsi_debug.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
index 139f0073da371..1ad7260d4758f 100644
--- a/drivers/scsi/scsi_debug.c
+++ b/drivers/scsi/scsi_debug.c
@@ -4482,8 +4482,6 @@ static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip)
 		goto fini;
 	}
 
-	if (zc == ZC2_IMPLICIT_OPEN)
-		zbc_close_zone(devip, zsp);
 	zbc_open_zone(devip, zsp, true);
 fini:
 	write_unlock(macc_lckp);
-- 
GitLab


From b474959d5afda6e341a02c85f9595d85d39189ae Mon Sep 17 00:00:00 2001
From: Yonghong Song <yhs@fb.com>
Date: Fri, 21 Aug 2020 12:10:54 -0700
Subject: [PATCH 0587/1341] bpf: Fix a buffer out-of-bound access when filling
 raw_tp link_info

Commit f2e10bff16a0 ("bpf: Add support for BPF_OBJ_GET_INFO_BY_FD for bpf_link")
added link query for raw_tp. One of fields in link_info is to
fill a user buffer with tp_name. The Scurrent checking only
declares "ulen && !ubuf" as invalid. So "!ulen && ubuf" will be
valid. Later on, we do "copy_to_user(ubuf, tp_name, ulen - 1)" which
may overwrite user memory incorrectly.

This patch fixed the problem by disallowing "!ulen && ubuf" case as well.

Fixes: f2e10bff16a0 ("bpf: Add support for BPF_OBJ_GET_INFO_BY_FD for bpf_link")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20200821191054.714731-1-yhs@fb.com
---
 kernel/bpf/syscall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/bpf/syscall.c b/kernel/bpf/syscall.c
index 86299a292214a..ac6c784c05764 100644
--- a/kernel/bpf/syscall.c
+++ b/kernel/bpf/syscall.c
@@ -2634,7 +2634,7 @@ static int bpf_raw_tp_link_fill_link_info(const struct bpf_link *link,
 	u32 ulen = info->raw_tracepoint.tp_name_len;
 	size_t tp_len = strlen(tp_name);
 
-	if (ulen && !ubuf)
+	if (!ulen ^ !ubuf)
 		return -EINVAL;
 
 	info->raw_tracepoint.tp_name_len = tp_len + 1;
-- 
GitLab


From 2b10af318ad305b8e56f1f7ad78ea3ba20aadc01 Mon Sep 17 00:00:00 2001
From: Jesper Dangaard Brouer <brouer@redhat.com>
Date: Mon, 24 Aug 2020 13:57:20 +0200
Subject: [PATCH 0588/1341] selftests/bpf: Fix test_progs-flavor run getting
 number of tests

Commit 643e7233aa94 ("selftests/bpf: Test_progs option for getting number of
tests") introduced ability to getting number of tests, which is targeted
towards scripting.  As demonstrate in the commit the number can be use as a
shell variable for further scripting.

The test_progs program support "flavor", which is detected by the binary
have a "-flavor" in the executable name. One example is test_progs-no_alu32,
which load bpf-progs compiled with disabled alu32, located in dir 'no_alu32/'.

The problem is that invoking a "flavor" binary prints to stdout e.g.:
 "Switching to flavor 'no_alu32' subdirectory..."
Thus, intermixing with the number of tests, making it unusable for scripting.

Fix the issue by only printing "flavor" info when verbose -v option is used.

Fixes: 643e7233aa94 ("selftests/bpf: Test_progs option for getting number of tests")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/159827024012.923543.7104106594870150597.stgit@firesoul
---
 tools/testing/selftests/bpf/test_progs.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_progs.c b/tools/testing/selftests/bpf/test_progs.c
index b1e4dadacd9b4..22943b58d752a 100644
--- a/tools/testing/selftests/bpf/test_progs.c
+++ b/tools/testing/selftests/bpf/test_progs.c
@@ -618,7 +618,9 @@ int cd_flavor_subdir(const char *exec_name)
 	if (!flavor)
 		return 0;
 	flavor++;
-	fprintf(stdout, "Switching to flavor '%s' subdirectory...\n", flavor);
+	if (env.verbosity > VERBOSE_NONE)
+		fprintf(stdout,	"Switching to flavor '%s' subdirectory...\n", flavor);
+
 	return chdir(flavor);
 }
 
-- 
GitLab


From 7787b6fc938e16aa418613c4a765c1dbb268ed9f Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Mon, 24 Aug 2020 16:20:47 +0200
Subject: [PATCH 0589/1341] bpf, sysctl: Let bpf_stats_handler take a kernel
 pointer buffer

Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ctl_table.proc_handler to take a kernel pointer. Adjust the
signature of bpf_stats_handler to match ctl_table.proc_handler which
fixes the following sparse warning:

kernel/sysctl.c:226:49: warning: incorrect type in argument 3 (different address spaces)
kernel/sysctl.c:226:49:    expected void *
kernel/sysctl.c:226:49:    got void [noderef] __user *buffer
kernel/sysctl.c:2640:35: warning: incorrect type in initializer (incompatible argument 3 (different address spaces))
kernel/sysctl.c:2640:35:    expected int ( [usertype] *proc_handler )( ... )
kernel/sysctl.c:2640:35:    got int ( * )( ... )

Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/bpf/20200824142047.22043-1-tklauser@distanz.ch
---
 kernel/sysctl.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 287862f91717a..09e70ee2332ed 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -204,8 +204,7 @@ static int max_extfrag_threshold = 1000;
 
 #if defined(CONFIG_BPF_SYSCALL) && defined(CONFIG_SYSCTL)
 static int bpf_stats_handler(struct ctl_table *table, int write,
-			     void __user *buffer, size_t *lenp,
-			     loff_t *ppos)
+			     void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct static_key *key = (struct static_key *)table->data;
 	static int saved_val;
-- 
GitLab


From e3cb82c6d6f6c27ab754e13ae29bdd6b949982e2 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 21 Aug 2020 20:03:33 +0300
Subject: [PATCH 0590/1341] i2c: core: Don't fail PRP0001 enumeration when no
 ID table exist
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

When commit c64ffff7a9d1 ("i2c: core: Allow empty id_table in ACPI case
as well") fixed the enumeration of I²C devices on ACPI enabled platforms
when driver has no ID table, it missed the PRP0001 support.

i2c_device_match() and i2c_acpi_match_device() differently match
driver against given device. Use acpi_driver_match_device(), that is used
in the former, in i2c_device_probe() and don't fail PRP0001 enumeration
when no ID table exist.

Fixes: c64ffff7a9d1 ("i2c: core: Allow empty id_table in ACPI case as well")
BugLink: https://stackoverflow.com/q/63519678/2511795
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/i2c-core-base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 34a9609f256da..5ec082e2039d9 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -480,7 +480,7 @@ static int i2c_device_probe(struct device *dev)
 	 * or ACPI ID table is supplied for the probing device.
 	 */
 	if (!driver->id_table &&
-	    !i2c_acpi_match_device(dev->driver->acpi_match_table, client) &&
+	    !acpi_driver_match_device(dev, dev->driver) &&
 	    !i2c_of_match_device(dev->driver->of_match_table, client)) {
 		status = -ENODEV;
 		goto put_sync_adapter;
-- 
GitLab


From e4682b8a688bc3352e663545ad51997c3d84877b Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 21 Aug 2020 20:03:34 +0300
Subject: [PATCH 0591/1341] i2c: acpi: Remove dead code, i.e.
 i2c_acpi_match_device()

We have no users of i2c_acpi_match_device() anymore and seems
will not have them in the future, thus remove dead code.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/i2c-core-acpi.c | 10 ----------
 drivers/i2c/i2c-core.h      |  9 ---------
 2 files changed, 19 deletions(-)

diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c
index 2ade99b105b91..e627d7b2790f7 100644
--- a/drivers/i2c/i2c-core-acpi.c
+++ b/drivers/i2c/i2c-core-acpi.c
@@ -276,16 +276,6 @@ void i2c_acpi_register_devices(struct i2c_adapter *adap)
 		dev_warn(&adap->dev, "failed to enumerate I2C slaves\n");
 }
 
-const struct acpi_device_id *
-i2c_acpi_match_device(const struct acpi_device_id *matches,
-		      struct i2c_client *client)
-{
-	if (!(client && matches))
-		return NULL;
-
-	return acpi_match_device(matches, &client->dev);
-}
-
 static const struct acpi_device_id i2c_acpi_force_400khz_device_ids[] = {
 	/*
 	 * These Silead touchscreen controllers only work at 400KHz, for
diff --git a/drivers/i2c/i2c-core.h b/drivers/i2c/i2c-core.h
index 94ff1693b3913..8ce261167a2d3 100644
--- a/drivers/i2c/i2c-core.h
+++ b/drivers/i2c/i2c-core.h
@@ -59,20 +59,11 @@ static inline int __i2c_check_suspended(struct i2c_adapter *adap)
 }
 
 #ifdef CONFIG_ACPI
-const struct acpi_device_id *
-i2c_acpi_match_device(const struct acpi_device_id *matches,
-		      struct i2c_client *client);
 void i2c_acpi_register_devices(struct i2c_adapter *adap);
 
 int i2c_acpi_get_irq(struct i2c_client *client);
 #else /* CONFIG_ACPI */
 static inline void i2c_acpi_register_devices(struct i2c_adapter *adap) { }
-static inline const struct acpi_device_id *
-i2c_acpi_match_device(const struct acpi_device_id *matches,
-		      struct i2c_client *client)
-{
-	return NULL;
-}
 
 static inline int i2c_acpi_get_irq(struct i2c_client *client)
 {
-- 
GitLab


From ee0761d1d8222bcc5c86bf10849dc86cf008557c Mon Sep 17 00:00:00 2001
From: Tong Zhang <ztong0001@gmail.com>
Date: Mon, 24 Aug 2020 18:45:41 -0400
Subject: [PATCH 0592/1341] ALSA: ca0106: fix error code handling

snd_ca0106_spi_write() returns 1 on error, snd_ca0106_pcm_power_dac()
is returning the error code directly, and the caller is expecting an
negative error code

Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200824224541.1260307-1-ztong0001@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/ca0106/ca0106_main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/pci/ca0106/ca0106_main.c b/sound/pci/ca0106/ca0106_main.c
index 70d775ff967eb..c189f70c82cb9 100644
--- a/sound/pci/ca0106/ca0106_main.c
+++ b/sound/pci/ca0106/ca0106_main.c
@@ -537,7 +537,8 @@ static int snd_ca0106_pcm_power_dac(struct snd_ca0106 *chip, int channel_id,
 		else
 			/* Power down */
 			chip->spi_dac_reg[reg] |= bit;
-		return snd_ca0106_spi_write(chip, chip->spi_dac_reg[reg]);
+		if (snd_ca0106_spi_write(chip, chip->spi_dac_reg[reg]) != 0)
+			return -ENXIO;
 	}
 	return 0;
 }
-- 
GitLab


From 216116eae43963c662eb84729507bad95214ca6b Mon Sep 17 00:00:00 2001
From: Mohan Kumar <mkumard@nvidia.com>
Date: Tue, 25 Aug 2020 10:54:14 +0530
Subject: [PATCH 0593/1341] ALSA: hda: Fix 2 channel swapping for Tegra

The Tegra HDA codec HW implementation has an issue related to not
swapping the 2 channel Audio Sample Packet(ASP) channel mapping.
Whatever the FL and FR mapping specified the left channel always
comes out of left speaker and right channel on right speaker. So
add condition to disallow the swapping of FL,FR during the playback.

Signed-off-by: Mohan Kumar <mkumard@nvidia.com>
Acked-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/20200825052415.20626-2-mkumard@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_hdmi.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index b8c8490e568b7..3259d713ace9d 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -3734,6 +3734,7 @@ static int tegra_hdmi_build_pcms(struct hda_codec *codec)
 
 static int patch_tegra_hdmi(struct hda_codec *codec)
 {
+	struct hdmi_spec *spec;
 	int err;
 
 	err = patch_generic_hdmi(codec);
@@ -3741,6 +3742,10 @@ static int patch_tegra_hdmi(struct hda_codec *codec)
 		return err;
 
 	codec->patch_ops.build_pcms = tegra_hdmi_build_pcms;
+	spec = codec->spec;
+	spec->chmap.ops.chmap_cea_alloc_validate_get_type =
+		nvhdmi_chmap_cea_alloc_validate_get_type;
+	spec->chmap.ops.chmap_validate = nvhdmi_chmap_validate;
 
 	return 0;
 }
-- 
GitLab


From 23d63a31d9f44d7daeac0d1fb65c6a73c70e5216 Mon Sep 17 00:00:00 2001
From: Mohan Kumar <mkumard@nvidia.com>
Date: Tue, 25 Aug 2020 10:54:15 +0530
Subject: [PATCH 0594/1341] ALSA: hda/tegra: Program WAKEEN register for Tegra

The WAKEEN bits are used to indicate which bits in the
STATESTS register may cause wake event during the codec
state change request. Configure the WAKEEN register for
the Tegra to detect the wake events.

Signed-off-by: Mohan Kumar <mkumard@nvidia.com>
Acked-by: Sameer Pujar <spujar@nvidia.com>
Link: https://lore.kernel.org/r/20200825052415.20626-3-mkumard@nvidia.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/hda_tegra.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
index c94553bcca888..70164d1428d40 100644
--- a/sound/pci/hda/hda_tegra.c
+++ b/sound/pci/hda/hda_tegra.c
@@ -179,6 +179,10 @@ static int __maybe_unused hda_tegra_runtime_suspend(struct device *dev)
 	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
 
 	if (chip && chip->running) {
+		/* enable controller wake up event */
+		azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) |
+			   STATESTS_INT_MASK);
+
 		azx_stop_chip(chip);
 		azx_enter_link_reset(chip);
 	}
@@ -200,6 +204,9 @@ static int __maybe_unused hda_tegra_runtime_resume(struct device *dev)
 	if (chip && chip->running) {
 		hda_tegra_init(hda);
 		azx_init_chip(chip, 1);
+		/* disable controller wake up event*/
+		azx_writew(chip, WAKEEN, azx_readw(chip, WAKEEN) &
+			   ~STATESTS_INT_MASK);
 	}
 
 	return 0;
-- 
GitLab


From 914a7b3563b8fb92f976619bbd0fa3a4a708baae Mon Sep 17 00:00:00 2001
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: Mon, 17 Aug 2020 14:19:30 +0200
Subject: [PATCH 0595/1341] i2c: rcar: in slave mode, clear NACK earlier

Currently, a NACK in slave mode is set/cleared when SCL is held low by
the IP core right before the bit is about to be pushed out. This is too
late for clearing and then a NACK from the previous byte is still used
for the current one. Now, let's clear the NACK right after we detected
the STOP condition following the NACK.

Fixes: de20d1857dd6 ("i2c: rcar: add slave support")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/busses/i2c-rcar.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
index 9e883474db8ce..c7c543483b08c 100644
--- a/drivers/i2c/busses/i2c-rcar.c
+++ b/drivers/i2c/busses/i2c-rcar.c
@@ -590,6 +590,7 @@ static bool rcar_i2c_slave_irq(struct rcar_i2c_priv *priv)
 	/* master sent stop */
 	if (ssr_filtered & SSR) {
 		i2c_slave_event(priv->slave, I2C_SLAVE_STOP, &value);
+		rcar_i2c_write(priv, ICSCR, SIE | SDBS); /* clear our NACK */
 		rcar_i2c_write(priv, ICSIER, SAR);
 		rcar_i2c_write(priv, ICSSR, ~SSR & 0xff);
 	}
-- 
GitLab


From 0204081128d582965e9e39ca83ee6e4f7d27142b Mon Sep 17 00:00:00 2001
From: Ray Jui <ray.jui@broadcom.com>
Date: Fri, 14 Aug 2020 15:40:08 -0700
Subject: [PATCH 0596/1341] i2c: iproc: Fix shifting 31 bits

Fix undefined behaviour in the iProc I2C driver by using 'BIT' marcro.

Reported-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Ray Jui <ray.jui@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
[wsa: in commit msg, don't say 'checkpatch' but name the issue]
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/busses/i2c-bcm-iproc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-bcm-iproc.c b/drivers/i2c/busses/i2c-bcm-iproc.c
index 688e928188214..d8295b1c379d1 100644
--- a/drivers/i2c/busses/i2c-bcm-iproc.c
+++ b/drivers/i2c/busses/i2c-bcm-iproc.c
@@ -720,7 +720,7 @@ static int bcm_iproc_i2c_xfer_internal(struct bcm_iproc_i2c_dev *iproc_i2c,
 
 			/* mark the last byte */
 			if (!process_call && (i == msg->len - 1))
-				val |= 1 << M_TX_WR_STATUS_SHIFT;
+				val |= BIT(M_TX_WR_STATUS_SHIFT);
 
 			iproc_i2c_wr_reg(iproc_i2c, M_TX_OFFSET, val);
 		}
@@ -738,7 +738,7 @@ static int bcm_iproc_i2c_xfer_internal(struct bcm_iproc_i2c_dev *iproc_i2c,
 		 */
 		addr = i2c_8bit_addr_from_msg(msg);
 		/* mark it the last byte out */
-		val = addr | (1 << M_TX_WR_STATUS_SHIFT);
+		val = addr | BIT(M_TX_WR_STATUS_SHIFT);
 		iproc_i2c_wr_reg(iproc_i2c, M_TX_OFFSET, val);
 	}
 
-- 
GitLab


From e5f10d6385cda083037915c12b130887c8831d2b Mon Sep 17 00:00:00 2001
From: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Date: Mon, 17 Aug 2020 22:59:26 +0300
Subject: [PATCH 0597/1341] drm/i915: Fix cmd parser desc matching with masks

Our variety of defined gpu commands have the actual
command id field and possibly length and flags applied.

We did start to apply the mask during initialization of
the cmd descriptors but forgot to also apply it on comparisons.

Fix comparisons in order to properly deny access with
associated commands.

v2: fix lri with correct mask (Chris)

References: 926abff21a8f ("drm/i915/cmdparser: Ignore Length operands during command matching")
Reported-by: Nicolai Stange <nstange@suse.de>
Cc: stable@vger.kernel.org # v5.4+
Cc: Miroslav Benes <mbenes@suse.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Tyler Hicks <tyhicks@canonical.com>
Cc: Jon Bloomfield <jon.bloomfield@intel.com>
Cc: Chris Wilson <chris.p.wilson@intel.com>
Signed-off-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200817195926.12671-1-mika.kuoppala@linux.intel.com
(cherry picked from commit 3b4efa148da36f158cce3f662e831af2834b8e0f)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/i915_cmd_parser.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_cmd_parser.c b/drivers/gpu/drm/i915/i915_cmd_parser.c
index 372354d33f552..5ac4a999f05a6 100644
--- a/drivers/gpu/drm/i915/i915_cmd_parser.c
+++ b/drivers/gpu/drm/i915/i915_cmd_parser.c
@@ -1204,6 +1204,12 @@ static u32 *copy_batch(struct drm_i915_gem_object *dst_obj,
 	return dst;
 }
 
+static inline bool cmd_desc_is(const struct drm_i915_cmd_descriptor * const desc,
+			       const u32 cmd)
+{
+	return desc->cmd.value == (cmd & desc->cmd.mask);
+}
+
 static bool check_cmd(const struct intel_engine_cs *engine,
 		      const struct drm_i915_cmd_descriptor *desc,
 		      const u32 *cmd, u32 length)
@@ -1242,19 +1248,19 @@ static bool check_cmd(const struct intel_engine_cs *engine,
 			 * allowed mask/value pair given in the whitelist entry.
 			 */
 			if (reg->mask) {
-				if (desc->cmd.value == MI_LOAD_REGISTER_MEM) {
+				if (cmd_desc_is(desc, MI_LOAD_REGISTER_MEM)) {
 					DRM_DEBUG("CMD: Rejected LRM to masked register 0x%08X\n",
 						  reg_addr);
 					return false;
 				}
 
-				if (desc->cmd.value == MI_LOAD_REGISTER_REG) {
+				if (cmd_desc_is(desc, MI_LOAD_REGISTER_REG)) {
 					DRM_DEBUG("CMD: Rejected LRR to masked register 0x%08X\n",
 						  reg_addr);
 					return false;
 				}
 
-				if (desc->cmd.value == MI_LOAD_REGISTER_IMM(1) &&
+				if (cmd_desc_is(desc, MI_LOAD_REGISTER_IMM(1)) &&
 				    (offset + 2 > length ||
 				     (cmd[offset + 1] & reg->mask) != reg->value)) {
 					DRM_DEBUG("CMD: Rejected LRI to masked register 0x%08X\n",
@@ -1478,7 +1484,7 @@ int intel_engine_cmd_parser(struct intel_engine_cs *engine,
 			break;
 		}
 
-		if (desc->cmd.value == MI_BATCH_BUFFER_START) {
+		if (cmd_desc_is(desc, MI_BATCH_BUFFER_START)) {
 			ret = check_bbstart(cmd, offset, length, batch_length,
 					    batch_addr, shadow_addr,
 					    jump_whitelist);
-- 
GitLab


From 8824d19b45867be75d375385414c4f06719a11a4 Mon Sep 17 00:00:00 2001
From: "Nikunj A. Dadhania" <nikunj.dadhania@linux.intel.com>
Date: Tue, 21 Jul 2020 17:05:23 +0530
Subject: [PATCH 0598/1341] thunderbolt: Disable ports that are not implemented

Commit 4caf2511ec49 ("thunderbolt: Add trivial .shutdown") exposes a bug
in the Thunderbolt driver, that frees an unallocated id, resulting in the
following spinlock bad magic bug.

[ 20.633803] BUG: spinlock bad magic on CPU#4, halt/3313
[ 20.640030] lock: 0xffff92e6ad5c97e0, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
[ 20.672139] Call Trace:
[ 20.675032] dump_stack+0x97/0xdb
[ 20.678950] ? spin_bug+0xa5/0xb0
[ 20.682865] do_raw_spin_lock+0x68/0x98
[ 20.687397] _raw_spin_lock_irqsave+0x3f/0x5d
[ 20.692535] ida_destroy+0x4f/0x124
[ 20.696657] tb_switch_release+0x6d/0xfd
[ 20.701295] device_release+0x2c/0x7d
[ 20.705622] kobject_put+0x8e/0xac
[ 20.709637] tb_stop+0x55/0x66
[ 20.713243] tb_domain_remove+0x36/0x62
[ 20.717774] nhi_remove+0x4d/0x58

Fix the issue by disabling ports that are enabled as per the EEPROM, but
not implemented. While at it, update the kernel doc for the disabled
field, to reflect this.

Cc: stable@vger.kernel.org
Fixes: 4caf2511ec49 ("thunderbolt: Add trivial .shutdown")
Reported-by: Srikanth Nandamuri <srikanth.nandamuri@intel.com>
Signed-off-by: Nikunj A. Dadhania <nikunj.dadhania@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
 drivers/thunderbolt/switch.c | 1 +
 drivers/thunderbolt/tb.h     | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 712395f518b82..698c52775eec5 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -684,6 +684,7 @@ static int tb_init_port(struct tb_port *port)
 		if (res == -ENODEV) {
 			tb_dbg(port->sw->tb, " Port %d: not implemented\n",
 			       port->port);
+			port->disabled = true;
 			return 0;
 		}
 		return res;
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index a413d55b5f8b3..3c620a9203c5a 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -186,7 +186,7 @@ struct tb_switch {
  * @cap_adap: Offset of the adapter specific capability (%0 if not present)
  * @cap_usb4: Offset to the USB4 port capability (%0 if not present)
  * @port: Port number on switch
- * @disabled: Disabled by eeprom
+ * @disabled: Disabled by eeprom or enabled but not implemented
  * @bonded: true if the port is bonded (two lanes combined as one)
  * @dual_link_port: If the switch is connected using two ports, points
  *		    to the other port.
-- 
GitLab


From 813050e0a9b871ac575abfd3d321f74916df609d Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Wed, 24 Jun 2020 21:45:03 +0300
Subject: [PATCH 0599/1341] thunderbolt: Use maximum USB3 link rate when
 reclaiming if link is not up

If the USB3 link is not up the actual link rate is 0 so when reclaiming
bandwidth we should look at maximum supported link rate instead.

Cc: stable@vger.kernel.org
Fixes: 0bd680cd900c ("thunderbolt: Add USB3 bandwidth management")
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
 drivers/thunderbolt/tunnel.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/thunderbolt/tunnel.c b/drivers/thunderbolt/tunnel.c
index 2aae2c76d880d..d50e5b93632a7 100644
--- a/drivers/thunderbolt/tunnel.c
+++ b/drivers/thunderbolt/tunnel.c
@@ -951,10 +951,18 @@ static void tb_usb3_reclaim_available_bandwidth(struct tb_tunnel *tunnel,
 	int ret, max_rate, allocate_up, allocate_down;
 
 	ret = usb4_usb3_port_actual_link_rate(tunnel->src_port);
-	if (ret <= 0) {
-		tb_tunnel_warn(tunnel, "tunnel is not up\n");
+	if (ret < 0) {
+		tb_tunnel_warn(tunnel, "failed to read actual link rate\n");
 		return;
+	} else if (!ret) {
+		/* Use maximum link rate if the link valid is not set */
+		ret = usb4_usb3_port_max_link_rate(tunnel->src_port);
+		if (ret < 0) {
+			tb_tunnel_warn(tunnel, "failed to read maximum link rate\n");
+			return;
+		}
 	}
+
 	/*
 	 * 90% of the max rate can be allocated for isochronous
 	 * transfers.
-- 
GitLab


From 7fd5b25499bcec157dd4de9a713425efcf4571cd Mon Sep 17 00:00:00 2001
From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Wed, 19 Aug 2020 13:30:21 +0300
Subject: [PATCH 0600/1341] drm/omap: fix incorrect lock state

After commit 92cc68e35863c1c61c449efa2b2daef6e9926048 ("drm/vblank: Use
spin_(un)lock_irq() in drm_crtc_vblank_on()") omapdrm locking is broken:

WARNING: inconsistent lock state
5.8.0-rc2-00483-g92cc68e35863 #13 Tainted: G        W
--------------------------------
inconsistent {HARDIRQ-ON-W} -> {IN-HARDIRQ-W} usage.
swapper/0/0 [HC1[1]:SC0[0]:HE0:SE1] takes:
ea98222c (&dev->event_lock#2){?.+.}-{2:2}, at: drm_handle_vblank+0x4c/0x520 [drm]
{HARDIRQ-ON-W} state was registered at:
  trace_hardirqs_on+0x9c/0x1ec
  _raw_spin_unlock_irq+0x20/0x58
  omap_crtc_atomic_enable+0x54/0xa0 [omapdrm]
  drm_atomic_helper_commit_modeset_enables+0x218/0x270 [drm_kms_helper]
  omap_atomic_commit_tail+0x48/0xc4 [omapdrm]
  commit_tail+0x9c/0x190 [drm_kms_helper]
  drm_atomic_helper_commit+0x154/0x188 [drm_kms_helper]
  drm_client_modeset_commit_atomic+0x228/0x268 [drm]
  drm_client_modeset_commit_locked+0x60/0x1d0 [drm]
  drm_client_modeset_commit+0x24/0x40 [drm]
  drm_fb_helper_restore_fbdev_mode_unlocked+0x54/0xa8 [drm_kms_helper]
  drm_fb_helper_set_par+0x2c/0x5c [drm_kms_helper]
  drm_fb_helper_hotplug_event.part.0+0xa0/0xbc [drm_kms_helper]
  drm_kms_helper_hotplug_event+0x24/0x30 [drm_kms_helper]
  output_poll_execute+0x1a8/0x1c0 [drm_kms_helper]
  process_one_work+0x268/0x800
  worker_thread+0x30/0x4e0
  kthread+0x164/0x190
  ret_from_fork+0x14/0x20

The reason for this is that omapdrm calls drm_crtc_vblank_on() while
holding event_lock taken with spin_lock_irq().

It is not clear why drm_crtc_vblank_on() and drm_crtc_vblank_get() are
called while holding event_lock. I don't see any problem with moving
those calls outside the lock, which is what this patch does.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200819103021.440288-1-tomi.valkeinen@ti.com
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/gpu/drm/omapdrm/omap_crtc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/omapdrm/omap_crtc.c b/drivers/gpu/drm/omapdrm/omap_crtc.c
index 6d40914675dad..328a4a74f534e 100644
--- a/drivers/gpu/drm/omapdrm/omap_crtc.c
+++ b/drivers/gpu/drm/omapdrm/omap_crtc.c
@@ -451,11 +451,12 @@ static void omap_crtc_atomic_enable(struct drm_crtc *crtc,
 	if (omap_state->manually_updated)
 		return;
 
-	spin_lock_irq(&crtc->dev->event_lock);
 	drm_crtc_vblank_on(crtc);
+
 	ret = drm_crtc_vblank_get(crtc);
 	WARN_ON(ret != 0);
 
+	spin_lock_irq(&crtc->dev->event_lock);
 	omap_crtc_arm_event(crtc);
 	spin_unlock_irq(&crtc->dev->event_lock);
 }
-- 
GitLab


From 710d4d916e6d84aa3f1507db1f1dfce8f60211a1 Mon Sep 17 00:00:00 2001
From: Michal Simek <michal.simek@xilinx.com>
Date: Mon, 24 Aug 2020 10:25:23 +0200
Subject: [PATCH 0601/1341] dt-bindings: mmc: Add missing description for
 clk_in/out_sd1

The commit a8fdb80f4d47 ("arm64: zynqmp: Add ZynqMP SDHCI compatible
string") added clock-output-names for both SDHCIs before DT binding yaml
conversion. But only clk_in/out_sd0 clock names have been covered by
DT binding which ends up with dt yaml checking warnings as:
From schema: .../Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
... mmc@ff170000: clock-output-names:0: 'clk_out_sd0' was expected
... mmc@ff170000: clock-output-names:1: 'clk_in_sd0' was expected

Fixes: 16ecd8f33c6e ("dt-bindings: mmc: convert arasan sdhci bindings to yaml")
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Manish Narani <manish.narani@xilinx.com>
Link: https://lore.kernel.org/r/aef586778921c93377ec2f31c86e151b6e93f6c7.1598257520.git.michal.simek@xilinx.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 .../devicetree/bindings/mmc/arasan,sdhci.yaml          | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml b/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
index 5887c917d480b..58fe9d02a781a 100644
--- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
+++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.yaml
@@ -30,9 +30,13 @@ allOf:
     then:
       properties:
         clock-output-names:
-          items:
-            - const: clk_out_sd0
-            - const: clk_in_sd0
+          oneOf:
+            - items:
+              - const: clk_out_sd0
+              - const: clk_in_sd0
+            - items:
+              - const: clk_out_sd1
+              - const: clk_in_sd1
 
 properties:
   compatible:
-- 
GitLab


From a150dac5a8fb711fdc378c23f44bee4546f04246 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 25 Aug 2020 10:38:39 +0100
Subject: [PATCH 0602/1341] irqchip: Revert modular support for drivers using
 IRQCHIP_PLATFORM_DRIVER helperse

It has become obvious that switching a number of irqchip drivers
to being platform drivers without considering the platform was a
mistake. We have multiple reports of end-point drivers not
probing because the irqchip driver isn't there yet, breaking
the expectations of the users.

This patch reverts:

920ecb8c35cb ("irqchip/mtk-cirq: Convert to a platform driver")
f97dbf48ca43 ("irqchip/mtk-sysirq: Convert to a platform driver")
5be57099d445 ("irqchip/qcom-pdc: Switch to using IRQCHIP_PLATFORM_DRIVER helper macros")
95bf9305d2e3 ("irqchip/qcom-pdc: Allow QCOM_PDC to be loadable as a permanent module")

and leave QCOM PDC, MTK sysrq and cirq drivers as built-in, special purpose
drivers for the time being until we have worked out a better solution.

Reported-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reported-by: Frank Wunderlich <linux@fw-web.de>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/93debe6a0308b66d3f307af67ba7ec2c@kernel.org
---
 drivers/irqchip/Kconfig          | 2 +-
 drivers/irqchip/irq-mtk-cirq.c   | 4 +---
 drivers/irqchip/irq-mtk-sysirq.c | 4 +---
 drivers/irqchip/qcom-pdc.c       | 8 +-------
 4 files changed, 4 insertions(+), 14 deletions(-)

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index bb70b7177f94e..bfc9719dbcdc3 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -425,7 +425,7 @@ config GOLDFISH_PIC
          for Goldfish based virtual platforms.
 
 config QCOM_PDC
-	tristate "QCOM PDC"
+	bool "QCOM PDC"
 	depends on ARCH_QCOM
 	select IRQ_DOMAIN_HIERARCHY
 	help
diff --git a/drivers/irqchip/irq-mtk-cirq.c b/drivers/irqchip/irq-mtk-cirq.c
index 62a61275aaa31..69ba8ce3c1785 100644
--- a/drivers/irqchip/irq-mtk-cirq.c
+++ b/drivers/irqchip/irq-mtk-cirq.c
@@ -295,6 +295,4 @@ static int __init mtk_cirq_of_init(struct device_node *node,
 	return ret;
 }
 
-IRQCHIP_PLATFORM_DRIVER_BEGIN(mtk_cirq)
-IRQCHIP_MATCH("mediatek,mtk-cirq", mtk_cirq_of_init)
-IRQCHIP_PLATFORM_DRIVER_END(mtk_cirq)
+IRQCHIP_DECLARE(mtk_cirq, "mediatek,mtk-cirq", mtk_cirq_of_init);
diff --git a/drivers/irqchip/irq-mtk-sysirq.c b/drivers/irqchip/irq-mtk-sysirq.c
index 7299c5ab4d107..6ff98b87e5c04 100644
--- a/drivers/irqchip/irq-mtk-sysirq.c
+++ b/drivers/irqchip/irq-mtk-sysirq.c
@@ -231,6 +231,4 @@ static int __init mtk_sysirq_of_init(struct device_node *node,
 	kfree(chip_data);
 	return ret;
 }
-IRQCHIP_PLATFORM_DRIVER_BEGIN(mtk_sysirq)
-IRQCHIP_MATCH("mediatek,mt6577-sysirq", mtk_sysirq_of_init)
-IRQCHIP_PLATFORM_DRIVER_END(mtk_sysirq)
+IRQCHIP_DECLARE(mtk_sysirq, "mediatek,mt6577-sysirq", mtk_sysirq_of_init);
diff --git a/drivers/irqchip/qcom-pdc.c b/drivers/irqchip/qcom-pdc.c
index c1c5dfad57ccd..6ae9e1f0819da 100644
--- a/drivers/irqchip/qcom-pdc.c
+++ b/drivers/irqchip/qcom-pdc.c
@@ -11,11 +11,9 @@
 #include <linux/irqdomain.h>
 #include <linux/io.h>
 #include <linux/kernel.h>
-#include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_device.h>
-#include <linux/of_irq.h>
 #include <linux/soc/qcom/irq.h>
 #include <linux/spinlock.h>
 #include <linux/slab.h>
@@ -432,8 +430,4 @@ static int qcom_pdc_init(struct device_node *node, struct device_node *parent)
 	return ret;
 }
 
-IRQCHIP_PLATFORM_DRIVER_BEGIN(qcom_pdc)
-IRQCHIP_MATCH("qcom,pdc", qcom_pdc_init)
-IRQCHIP_PLATFORM_DRIVER_END(qcom_pdc)
-MODULE_DESCRIPTION("Qualcomm Technologies, Inc. Power Domain Controller");
-MODULE_LICENSE("GPL v2");
+IRQCHIP_DECLARE(qcom_pdc, "qcom,pdc", qcom_pdc_init);
-- 
GitLab


From e579076ac0a3bebb440fab101aef3c42c9f4c709 Mon Sep 17 00:00:00 2001
From: qiuguorui1 <qiuguorui1@huawei.com>
Date: Thu, 20 Aug 2020 11:16:29 +0800
Subject: [PATCH 0603/1341] irqchip/stm32-exti: Avoid losing interrupts due to
 clearing pending bits by mistake

In the current code, when the eoi callback of the exti clears the pending
bit of the current interrupt, it will first read the values of fpr and
rpr, then logically OR the corresponding bit of the interrupt number,
and finally write back to fpr and rpr.

We found through experiments that if two exti interrupts,
we call them int1/int2, arrive almost at the same time. in our scenario,
the time difference is 30 microseconds, assuming int1 is triggered first.

there will be an extreme scenario: both int's pending bit are set to 1,
the irq handle of int1 is executed first, and eoi handle is then executed,
at this moment, all pending bits are cleared, but the int 2 has not
finally been reported to the cpu yet, which eventually lost int2.

According to stm32's TRM description about rpr and fpr: Writing a 1 to this
bit will trigger a rising edge event on event x, Writing 0 has no
effect.

Therefore, when clearing the pending bit, we only need to clear the
pending bit of the irq.

Fixes: 927abfc4461e7 ("irqchip/stm32: Add stm32mp1 support with hierarchy domain")
Signed-off-by: qiuguorui1 <qiuguorui1@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: stable@vger.kernel.org # v4.18+
Link: https://lore.kernel.org/r/20200820031629.15582-1-qiuguorui1@huawei.com
---
 drivers/irqchip/irq-stm32-exti.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index 03a36be757d81..0c2c61db26b45 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -416,6 +416,16 @@ static void stm32_irq_ack(struct irq_data *d)
 	irq_gc_unlock(gc);
 }
 
+/* directly set the target bit without reading first. */
+static inline void stm32_exti_write_bit(struct irq_data *d, u32 reg)
+{
+	struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
+	void __iomem *base = chip_data->host_data->base;
+	u32 val = BIT(d->hwirq % IRQS_PER_BANK);
+
+	writel_relaxed(val, base + reg);
+}
+
 static inline u32 stm32_exti_set_bit(struct irq_data *d, u32 reg)
 {
 	struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
@@ -449,9 +459,9 @@ static void stm32_exti_h_eoi(struct irq_data *d)
 
 	raw_spin_lock(&chip_data->rlock);
 
-	stm32_exti_set_bit(d, stm32_bank->rpr_ofst);
+	stm32_exti_write_bit(d, stm32_bank->rpr_ofst);
 	if (stm32_bank->fpr_ofst != UNDEF_REG)
-		stm32_exti_set_bit(d, stm32_bank->fpr_ofst);
+		stm32_exti_write_bit(d, stm32_bank->fpr_ofst);
 
 	raw_spin_unlock(&chip_data->rlock);
 
-- 
GitLab


From 821fc9e261f3af235752f46e59084467cfd440c4 Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Wed, 19 Aug 2020 20:06:02 +0200
Subject: [PATCH 0604/1341] irqchip/ingenic: Leave parent IRQ unmasked on
 suspend

All the wakeup sources we possibly want will go through the interrupt
controller, so the parent IRQ must not be masked during suspend, or
there won't be any way to wake up the system.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20200819180602.136969-1-paul@crapouillou.net
---
 drivers/irqchip/irq-ingenic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-ingenic.c b/drivers/irqchip/irq-ingenic.c
index 9f3da4260ca65..b61a8901ef722 100644
--- a/drivers/irqchip/irq-ingenic.c
+++ b/drivers/irqchip/irq-ingenic.c
@@ -125,7 +125,7 @@ static int __init ingenic_intc_of_init(struct device_node *node,
 		irq_reg_writel(gc, IRQ_MSK(32), JZ_REG_INTC_SET_MASK);
 	}
 
-	if (request_irq(parent_irq, intc_cascade, 0,
+	if (request_irq(parent_irq, intc_cascade, IRQF_NO_SUSPEND,
 			"SoC intc cascade interrupt", NULL))
 		pr_err("Failed to register SoC intc cascade interrupt\n");
 	return 0;
-- 
GitLab


From eed8f88b109aa927fbf0d0c80ff9f8d00444ca7f Mon Sep 17 00:00:00 2001
From: Tiezhu Yang <yangtiezhu@loongson.cn>
Date: Tue, 25 Aug 2020 17:39:48 +0800
Subject: [PATCH 0605/1341] Revert "ALSA: hda: Add support for Loongson 7A1000
 controller"

This reverts commit 61eee4a7fc40 ("ALSA: hda: Add support for Loongson
7A1000 controller") to fix the following error on the Loongson LS7A
platform:

rcu: INFO: rcu_preempt self-detected stall on CPU
<SNIP>
NMI backtrace for cpu 0
CPU: 0 PID: 68 Comm: kworker/0:2 Not tainted 5.8.0+ #3
Hardware name:  , BIOS
Workqueue: events azx_probe_work [snd_hda_intel]
<SNIP>
Call Trace:
[<ffffffff80211a64>] show_stack+0x9c/0x130
[<ffffffff8065a740>] dump_stack+0xb0/0xf0
[<ffffffff80665774>] nmi_cpu_backtrace+0x134/0x140
[<ffffffff80665910>] nmi_trigger_cpumask_backtrace+0x190/0x200
[<ffffffff802b1abc>] rcu_dump_cpu_stacks+0x12c/0x190
[<ffffffff802b08cc>] rcu_sched_clock_irq+0xa2c/0xfc8
[<ffffffff802b91d4>] update_process_times+0x2c/0xb8
[<ffffffff802cad80>] tick_sched_timer+0x40/0xb8
[<ffffffff802ba5f0>] __hrtimer_run_queues+0x118/0x1d0
[<ffffffff802bab74>] hrtimer_interrupt+0x12c/0x2d8
[<ffffffff8021547c>] c0_compare_interrupt+0x74/0xa0
[<ffffffff80296bd0>] __handle_irq_event_percpu+0xa8/0x198
[<ffffffff80296cf0>] handle_irq_event_percpu+0x30/0x90
[<ffffffff8029d958>] handle_percpu_irq+0x88/0xb8
[<ffffffff80296124>] generic_handle_irq+0x44/0x60
[<ffffffff80b3cfd0>] do_IRQ+0x18/0x28
[<ffffffff8067ace4>] plat_irq_dispatch+0x64/0x100
[<ffffffff80209a20>] handle_int+0x140/0x14c
[<ffffffff802402e8>] irq_exit+0xf8/0x100

Because AZX_DRIVER_GENERIC can not work well for Loongson LS7A HDA
controller, it needs some workarounds which are not merged into the
upstream kernel at this time, so it should revert this patch now.

Fixes: 61eee4a7fc40 ("ALSA: hda: Add support for Loongson 7A1000 controller")
Cc: <stable@vger.kernel.org> # 5.9-rc1+
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Link: https://lore.kernel.org/r/1598348388-2518-1-git-send-email-yangtiezhu@loongson.cn
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/hda_intel.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index e34a4d5d047c1..0f86e3765bb33 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2745,8 +2745,6 @@ static const struct pci_device_id azx_ids[] = {
 	  .driver_data = AZX_DRIVER_GENERIC | AZX_DCAPS_PRESET_ATI_HDMI },
 	/* Zhaoxin */
 	{ PCI_DEVICE(0x1d17, 0x3288), .driver_data = AZX_DRIVER_ZHAOXIN },
-	/* Loongson */
-	{ PCI_DEVICE(0x0014, 0x7a07), .driver_data = AZX_DRIVER_GENERIC },
 	{ 0, }
 };
 MODULE_DEVICE_TABLE(pci, azx_ids);
-- 
GitLab


From 0661cef675d37e2c4b66a996389ebeae8568e49e Mon Sep 17 00:00:00 2001
From: Marek Szyprowski <m.szyprowski@samsung.com>
Date: Tue, 25 Aug 2020 08:46:17 +0200
Subject: [PATCH 0606/1341] dmaengine: pl330: Fix burst length if burst size is
 smaller than bus width

Move the burst len fixup after setting the generic value for it. This
finally enables the fixup introduced by commit 137bd11090d8 ("dmaengine:
pl330: Align DMA memcpy operations to MFIFO width"), which otherwise was
overwritten by the generic value.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 137bd11090d8 ("dmaengine: pl330: Align DMA memcpy operations to MFIFO width")
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20200825064617.16193-1-m.szyprowski@samsung.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/pl330.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dma/pl330.c b/drivers/dma/pl330.c
index 2c508ee672b90..e010064d88460 100644
--- a/drivers/dma/pl330.c
+++ b/drivers/dma/pl330.c
@@ -2801,6 +2801,7 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
 	while (burst != (1 << desc->rqcfg.brst_size))
 		desc->rqcfg.brst_size++;
 
+	desc->rqcfg.brst_len = get_burst_len(desc, len);
 	/*
 	 * If burst size is smaller than bus width then make sure we only
 	 * transfer one at a time to avoid a burst stradling an MFIFO entry.
@@ -2808,7 +2809,6 @@ pl330_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dst,
 	if (desc->rqcfg.brst_size * 8 < pl330->pcfg.data_bus_width)
 		desc->rqcfg.brst_len = 1;
 
-	desc->rqcfg.brst_len = get_burst_len(desc, len);
 	desc->bytes_requested = len;
 
 	desc->txd.flags = flags;
-- 
GitLab


From 33ebffa105990c43bf336cabe26c77384f59fe70 Mon Sep 17 00:00:00 2001
From: Peter Ujfalusi <peter.ujfalusi@ti.com>
Date: Mon, 24 Aug 2020 15:01:08 +0300
Subject: [PATCH 0607/1341] dmaengine: ti: k3-udma: Fix the TR initialization
 for prep_slave_sg

The TR which needs to be initialized for the next sg entry is indexed by
tr_idx and not by the running i counter.

In case any sub element in the SG needs more than one TR, the code would
corrupt an already configured TR.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200824120108.9178-1-peter.ujfalusi@ti.com
Fixes: 6cf668a4ef829 ("dmaengine: ti: k3-udma: Use the TR counter helper for slave_sg and cyclic")
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/ti/k3-udma.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index c14e6cb105cd8..30cb514cee545 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -2059,9 +2059,9 @@ udma_prep_slave_sg_tr(struct udma_chan *uc, struct scatterlist *sgl,
 			return NULL;
 		}
 
-		cppi5_tr_init(&tr_req[i].flags, CPPI5_TR_TYPE1, false, false,
-			      CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
-		cppi5_tr_csf_set(&tr_req[i].flags, CPPI5_TR_CSF_SUPR_EVT);
+		cppi5_tr_init(&tr_req[tr_idx].flags, CPPI5_TR_TYPE1, false,
+			      false, CPPI5_TR_EVENT_SIZE_COMPLETION, 0);
+		cppi5_tr_csf_set(&tr_req[tr_idx].flags, CPPI5_TR_CSF_SUPR_EVT);
 
 		tr_req[tr_idx].addr = sg_addr;
 		tr_req[tr_idx].icnt0 = tr0_cnt0;
-- 
GitLab


From 05655541c9503bfd01af4e6cbd7f5a29ac748e6c Mon Sep 17 00:00:00 2001
From: Gustavo Pimentel <Gustavo.Pimentel@synopsys.com>
Date: Thu, 13 Aug 2020 16:14:04 +0200
Subject: [PATCH 0608/1341] dmaengine: dw-edma: Fix scatter-gather address
 calculation

Fix the source and destination physical address calculation of a
peripheral device on scatter-gather implementation.

This issue manifested during tests using a 64 bits architecture system.
The abnormal behavior wasn't visible before due to all previous tests
were done using 32 bits architecture system, that masked his effect.

Fixes: e63d79d1ffcd ("dmaengine: Add Synopsys eDMA IP core driver")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Link: https://lore.kernel.org/r/8d3ab7e2ba96563fe3495b32f60077fffb85307d.1597327623.git.gustavo.pimentel@synopsys.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dw-edma/dw-edma-core.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
index ed430ad9b3dd8..b971505b87152 100644
--- a/drivers/dma/dw-edma/dw-edma-core.c
+++ b/drivers/dma/dw-edma/dw-edma-core.c
@@ -405,7 +405,7 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 			if (xfer->cyclic) {
 				burst->dar = xfer->xfer.cyclic.paddr;
 			} else {
-				burst->dar = sg_dma_address(sg);
+				burst->dar = dst_addr;
 				/* Unlike the typical assumption by other
 				 * drivers/IPs the peripheral memory isn't
 				 * a FIFO memory, in this case, it's a
@@ -413,14 +413,13 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 				 * and destination addresses are increased
 				 * by the same portion (data length)
 				 */
-				src_addr += sg_dma_len(sg);
 			}
 		} else {
 			burst->dar = dst_addr;
 			if (xfer->cyclic) {
 				burst->sar = xfer->xfer.cyclic.paddr;
 			} else {
-				burst->sar = sg_dma_address(sg);
+				burst->sar = src_addr;
 				/* Unlike the typical assumption by other
 				 * drivers/IPs the peripheral memory isn't
 				 * a FIFO memory, in this case, it's a
@@ -428,12 +427,14 @@ dw_edma_device_transfer(struct dw_edma_transfer *xfer)
 				 * and destination addresses are increased
 				 * by the same portion (data length)
 				 */
-				dst_addr += sg_dma_len(sg);
 			}
 		}
 
-		if (!xfer->cyclic)
+		if (!xfer->cyclic) {
+			src_addr += sg_dma_len(sg);
+			dst_addr += sg_dma_len(sg);
 			sg = sg_next(sg);
+		}
 	}
 
 	return vchan_tx_prep(&chan->vc, &desc->vd, xfer->flags);
-- 
GitLab


From 6d6018fc30bee67290dbed2fa51123f7c6f3d691 Mon Sep 17 00:00:00 2001
From: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Date: Fri, 21 Aug 2020 09:14:23 +0530
Subject: [PATCH 0609/1341] drivers/dma/dma-jz4780: Fix race condition between
 probe and irq handler

In probe, IRQ is requested before zchan->id is initialized which can be
read in the irq handler. Hence, shift request irq after other initializations
complete.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com>
Reviewed-by: Paul Cercueil <paul@crapouillou.net>
Link: https://lore.kernel.org/r/20200821034423.12713-1-madhuparnabhowmik10@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/dma-jz4780.c | 38 +++++++++++++++++++-------------------
 1 file changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index 448f663da89c6..8beed91428bd6 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -879,24 +879,11 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	ret = platform_get_irq(pdev, 0);
-	if (ret < 0)
-		return ret;
-
-	jzdma->irq = ret;
-
-	ret = request_irq(jzdma->irq, jz4780_dma_irq_handler, 0, dev_name(dev),
-			  jzdma);
-	if (ret) {
-		dev_err(dev, "failed to request IRQ %u!\n", jzdma->irq);
-		return ret;
-	}
-
 	jzdma->clk = devm_clk_get(dev, NULL);
 	if (IS_ERR(jzdma->clk)) {
 		dev_err(dev, "failed to get clock\n");
 		ret = PTR_ERR(jzdma->clk);
-		goto err_free_irq;
+		return ret;
 	}
 
 	clk_prepare_enable(jzdma->clk);
@@ -949,10 +936,23 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 		jzchan->vchan.desc_free = jz4780_dma_desc_free;
 	}
 
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		goto err_disable_clk;
+
+	jzdma->irq = ret;
+
+	ret = request_irq(jzdma->irq, jz4780_dma_irq_handler, 0, dev_name(dev),
+			  jzdma);
+	if (ret) {
+		dev_err(dev, "failed to request IRQ %u!\n", jzdma->irq);
+		goto err_disable_clk;
+	}
+
 	ret = dmaenginem_async_device_register(dd);
 	if (ret) {
 		dev_err(dev, "failed to register device\n");
-		goto err_disable_clk;
+		goto err_free_irq;
 	}
 
 	/* Register with OF DMA helpers. */
@@ -960,17 +960,17 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 					 jzdma);
 	if (ret) {
 		dev_err(dev, "failed to register OF DMA controller\n");
-		goto err_disable_clk;
+		goto err_free_irq;
 	}
 
 	dev_info(dev, "JZ4780 DMA controller initialised\n");
 	return 0;
 
-err_disable_clk:
-	clk_disable_unprepare(jzdma->clk);
-
 err_free_irq:
 	free_irq(jzdma->irq, jzdma);
+
+err_disable_clk:
+	clk_disable_unprepare(jzdma->clk);
 	return ret;
 }
 
-- 
GitLab


From 842163154b87b01d8f516af15ad8916eb1661016 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 24 Aug 2020 11:45:26 -0600
Subject: [PATCH 0610/1341] io_uring: revert consumed iov_iter bytes on error

Some consumers of the iov_iter will return an error, but still have
bytes consumed in the iterator. This is an issue for -EAGAIN, since we
rely on a sane iov_iter state across retries.

Fix this by ensuring that we revert consumed bytes, if any, if the file
operations have consumed any bytes from iterator. This is similar to what
generic_file_read_iter() does, and is always safe as we have the previous
bytes count handy already.

Fixes: ff6165b2d7f6 ("io_uring: retain iov_iter state over io_read/io_write calls")
Reported-by: Dmitry Shulyak <yashulyak@gmail.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index c9d526ff55e08..e030b33fa53e1 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3153,6 +3153,8 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
 	} else if (ret == -EAGAIN) {
 		if (!force_nonblock)
 			goto done;
+		/* some cases will consume bytes even on error returns */
+		iov_iter_revert(iter, iov_count - iov_iter_count(iter));
 		ret = io_setup_async_rw(req, iovec, inline_vecs, iter, false);
 		if (ret)
 			goto out_free;
@@ -3294,6 +3296,8 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
 	if (!force_nonblock || ret2 != -EAGAIN) {
 		kiocb_done(kiocb, ret2, cs);
 	} else {
+		/* some cases will consume bytes even on error returns */
+		iov_iter_revert(iter, iov_count - iov_iter_count(iter));
 copy_iov:
 		ret = io_setup_async_rw(req, iovec, inline_vecs, iter, false);
 		if (!ret)
-- 
GitLab


From b274e47d9e3f4dcd4ad4028a316ec22dc4533ac7 Mon Sep 17 00:00:00 2001
From: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Date: Tue, 25 Aug 2020 14:59:40 +0200
Subject: [PATCH 0611/1341] gtp: add GTPA_LINK info to msg sent to userspace

During a dump, this attribute is essential, it enables the userspace to
know on which interface the context is linked to.

Fixes: 459aa660eb1d ("gtp: add initial driver for datapath of GPRS Tunneling Protocol (GTP-U)")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Tested-by: Gabriel Ganne <gabriel.ganne@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/gtp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index 21640a035d7df..8e47d0112e5dc 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -1179,6 +1179,7 @@ static int gtp_genl_fill_info(struct sk_buff *skb, u32 snd_portid, u32 snd_seq,
 		goto nlmsg_failure;
 
 	if (nla_put_u32(skb, GTPA_VERSION, pctx->gtp_version) ||
+	    nla_put_u32(skb, GTPA_LINK, pctx->dev->ifindex) ||
 	    nla_put_be32(skb, GTPA_PEER_ADDRESS, pctx->peer_addr_ip4.s_addr) ||
 	    nla_put_be32(skb, GTPA_MS_ADDRESS, pctx->ms_addr_ip4.s_addr))
 		goto nla_put_failure;
-- 
GitLab


From b1cd1b65afba95971fa457dfdb2c941c60d38c5b Mon Sep 17 00:00:00 2001
From: Brooke Basile <brookebasile@gmail.com>
Date: Tue, 25 Aug 2020 09:05:08 -0400
Subject: [PATCH 0612/1341] USB: gadget: u_f: add overflow checks to VLA macros

size can potentially hold an overflowed value if its assigned expression
is left unchecked, leading to a smaller than needed allocation when
vla_group_size() is used by callers to allocate memory.
To fix this, add a test for saturation before declaring variables and an
overflow check to (n) * sizeof(type).
If the expression results in overflow, vla_group_size() will return SIZE_MAX.

Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Suggested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Brooke Basile <brookebasile@gmail.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/gadget/u_f.h | 38 +++++++++++++++++++++++++++-----------
 1 file changed, 27 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/gadget/u_f.h b/drivers/usb/gadget/u_f.h
index eaa13fd3dc7f3..df4e1dcb357df 100644
--- a/drivers/usb/gadget/u_f.h
+++ b/drivers/usb/gadget/u_f.h
@@ -14,6 +14,7 @@
 #define __U_F_H__
 
 #include <linux/usb/gadget.h>
+#include <linux/overflow.h>
 
 /* Variable Length Array Macros **********************************************/
 #define vla_group(groupname) size_t groupname##__next = 0
@@ -21,21 +22,36 @@
 
 #define vla_item(groupname, type, name, n) \
 	size_t groupname##_##name##__offset = ({			       \
-		size_t align_mask = __alignof__(type) - 1;		       \
-		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
-		size_t size = (n) * sizeof(type);			       \
-		groupname##__next = offset + size;			       \
+		size_t offset = 0;					       \
+		if (groupname##__next != SIZE_MAX) {			       \
+			size_t align_mask = __alignof__(type) - 1;	       \
+			size_t offset = (groupname##__next + align_mask)       \
+					 & ~align_mask;			       \
+			size_t size = array_size(n, sizeof(type));	       \
+			if (check_add_overflow(offset, size,		       \
+					       &groupname##__next)) {          \
+				groupname##__next = SIZE_MAX;		       \
+				offset = 0;				       \
+			}						       \
+		}							       \
 		offset;							       \
 	})
 
 #define vla_item_with_sz(groupname, type, name, n) \
-	size_t groupname##_##name##__sz = (n) * sizeof(type);		       \
-	size_t groupname##_##name##__offset = ({			       \
-		size_t align_mask = __alignof__(type) - 1;		       \
-		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
-		size_t size = groupname##_##name##__sz;			       \
-		groupname##__next = offset + size;			       \
-		offset;							       \
+	size_t groupname##_##name##__sz = array_size(n, sizeof(type));	        \
+	size_t groupname##_##name##__offset = ({			        \
+		size_t offset = 0;						\
+		if (groupname##__next != SIZE_MAX) {				\
+			size_t align_mask = __alignof__(type) - 1;		\
+			size_t offset = (groupname##__next + align_mask)	\
+					 & ~align_mask;				\
+			if (check_add_overflow(offset, groupname##_##name##__sz,\
+							&groupname##__next)) {	\
+				groupname##__next = SIZE_MAX;			\
+				offset = 0;					\
+			}							\
+		}								\
+		offset;								\
 	})
 
 #define vla_ptr(ptr, groupname, name) \
-- 
GitLab


From 2b74b0a04d3e9f9f08ff026e5663dce88ff94e52 Mon Sep 17 00:00:00 2001
From: Brooke Basile <brookebasile@gmail.com>
Date: Tue, 25 Aug 2020 09:07:27 -0400
Subject: [PATCH 0613/1341] USB: gadget: f_ncm: add bounds checks to
 ncm_unwrap_ntb()

Some values extracted by ncm_unwrap_ntb() could possibly lead to several
different out of bounds reads of memory.  Specifically the values passed
to netdev_alloc_skb_ip_align() need to be checked so that memory is not
overflowed.

Resolve this by applying bounds checking to a number of different
indexes and lengths of the structure parsing logic.

Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com>
Signed-off-by: Brooke Basile <brookebasile@gmail.com>
Acked-by: Felipe Balbi <balbi@kernel.org>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/gadget/function/f_ncm.c | 81 ++++++++++++++++++++++++-----
 1 file changed, 69 insertions(+), 12 deletions(-)

diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c
index 1d900081b1f0c..b4206b0dede54 100644
--- a/drivers/usb/gadget/function/f_ncm.c
+++ b/drivers/usb/gadget/function/f_ncm.c
@@ -1181,12 +1181,15 @@ static int ncm_unwrap_ntb(struct gether *port,
 	int		ndp_index;
 	unsigned	dg_len, dg_len2;
 	unsigned	ndp_len;
+	unsigned	block_len;
 	struct sk_buff	*skb2;
 	int		ret = -EINVAL;
-	unsigned	max_size = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
+	unsigned	ntb_max = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize);
+	unsigned	frame_max = le16_to_cpu(ecm_desc.wMaxSegmentSize);
 	const struct ndp_parser_opts *opts = ncm->parser_opts;
 	unsigned	crc_len = ncm->is_crc ? sizeof(uint32_t) : 0;
 	int		dgram_counter;
+	bool		ndp_after_header;
 
 	/* dwSignature */
 	if (get_unaligned_le32(tmp) != opts->nth_sign) {
@@ -1205,25 +1208,37 @@ static int ncm_unwrap_ntb(struct gether *port,
 	}
 	tmp++; /* skip wSequence */
 
+	block_len = get_ncm(&tmp, opts->block_length);
 	/* (d)wBlockLength */
-	if (get_ncm(&tmp, opts->block_length) > max_size) {
+	if (block_len > ntb_max) {
 		INFO(port->func.config->cdev, "OUT size exceeded\n");
 		goto err;
 	}
 
 	ndp_index = get_ncm(&tmp, opts->ndp_index);
+	ndp_after_header = false;
 
 	/* Run through all the NDP's in the NTB */
 	do {
-		/* NCM 3.2 */
-		if (((ndp_index % 4) != 0) &&
-				(ndp_index < opts->nth_size)) {
+		/*
+		 * NCM 3.2
+		 * dwNdpIndex
+		 */
+		if (((ndp_index % 4) != 0) ||
+				(ndp_index < opts->nth_size) ||
+				(ndp_index > (block_len -
+					      opts->ndp_size))) {
 			INFO(port->func.config->cdev, "Bad index: %#X\n",
 			     ndp_index);
 			goto err;
 		}
+		if (ndp_index == opts->nth_size)
+			ndp_after_header = true;
 
-		/* walk through NDP */
+		/*
+		 * walk through NDP
+		 * dwSignature
+		 */
 		tmp = (void *)(skb->data + ndp_index);
 		if (get_unaligned_le32(tmp) != ncm->ndp_sign) {
 			INFO(port->func.config->cdev, "Wrong NDP SIGN\n");
@@ -1234,14 +1249,15 @@ static int ncm_unwrap_ntb(struct gether *port,
 		ndp_len = get_unaligned_le16(tmp++);
 		/*
 		 * NCM 3.3.1
+		 * wLength
 		 * entry is 2 items
 		 * item size is 16/32 bits, opts->dgram_item_len * 2 bytes
 		 * minimal: struct usb_cdc_ncm_ndpX + normal entry + zero entry
 		 * Each entry is a dgram index and a dgram length.
 		 */
 		if ((ndp_len < opts->ndp_size
-				+ 2 * 2 * (opts->dgram_item_len * 2))
-				|| (ndp_len % opts->ndplen_align != 0)) {
+				+ 2 * 2 * (opts->dgram_item_len * 2)) ||
+				(ndp_len % opts->ndplen_align != 0)) {
 			INFO(port->func.config->cdev, "Bad NDP length: %#X\n",
 			     ndp_len);
 			goto err;
@@ -1258,8 +1274,21 @@ static int ncm_unwrap_ntb(struct gether *port,
 
 		do {
 			index = index2;
+			/* wDatagramIndex[0] */
+			if ((index < opts->nth_size) ||
+					(index > block_len - opts->dpe_size)) {
+				INFO(port->func.config->cdev,
+				     "Bad index: %#X\n", index);
+				goto err;
+			}
+
 			dg_len = dg_len2;
-			if (dg_len < 14 + crc_len) { /* ethernet hdr + crc */
+			/*
+			 * wDatagramLength[0]
+			 * ethernet hdr + crc or larger than max frame size
+			 */
+			if ((dg_len < 14 + crc_len) ||
+					(dg_len > frame_max)) {
 				INFO(port->func.config->cdev,
 				     "Bad dgram length: %#X\n", dg_len);
 				goto err;
@@ -1283,6 +1312,37 @@ static int ncm_unwrap_ntb(struct gether *port,
 			index2 = get_ncm(&tmp, opts->dgram_item_len);
 			dg_len2 = get_ncm(&tmp, opts->dgram_item_len);
 
+			if (index2 == 0 || dg_len2 == 0)
+				break;
+
+			/* wDatagramIndex[1] */
+			if (ndp_after_header) {
+				if (index2 < opts->nth_size + opts->ndp_size) {
+					INFO(port->func.config->cdev,
+					     "Bad index: %#X\n", index2);
+					goto err;
+				}
+			} else {
+				if (index2 < opts->nth_size + opts->dpe_size) {
+					INFO(port->func.config->cdev,
+					     "Bad index: %#X\n", index2);
+					goto err;
+				}
+			}
+			if (index2 > block_len - opts->dpe_size) {
+				INFO(port->func.config->cdev,
+				     "Bad index: %#X\n", index2);
+				goto err;
+			}
+
+			/* wDatagramLength[1] */
+			if ((dg_len2 < 14 + crc_len) ||
+					(dg_len2 > frame_max)) {
+				INFO(port->func.config->cdev,
+				     "Bad dgram length: %#X\n", dg_len);
+				goto err;
+			}
+
 			/*
 			 * Copy the data into a new skb.
 			 * This ensures the truesize is correct
@@ -1299,9 +1359,6 @@ static int ncm_unwrap_ntb(struct gether *port,
 			ndp_len -= 2 * (opts->dgram_item_len * 2);
 
 			dgram_counter++;
-
-			if (index2 == 0 || dg_len2 == 0)
-				break;
 		} while (ndp_len > 2 * (opts->dgram_item_len * 2));
 	} while (ndp_index);
 
-- 
GitLab


From 41dd70b368278f3ac789bed25bc810f764e14bbf Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=91=A8=E7=90=B0=E6=9D=B0=20=28Zhou=20Yanjie=29?=
 <zhouyanjie@wanyeetech.com>
Date: Tue, 25 Aug 2020 16:16:54 +0800
Subject: [PATCH 0614/1341] USB: PHY: JZ4770: Fix static checker warning.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The commit 2a6c0b82e651 ("USB: PHY: JZ4770: Add support for new
Ingenic SoCs.") introduced the initialization function for different
chips, but left the relevant code involved in the resetting process
in the original function, resulting in uninitialized variable calls.

Fixes: 2a6c0b82e651 ("USB: PHY: JZ4770: Add support for new Ingenic SoCs.").
Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
Link: https://lore.kernel.org/r/20200825081654.18186-2-zhouyanjie@wanyeetech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/phy/phy-jz4770.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/phy/phy-jz4770.c b/drivers/usb/phy/phy-jz4770.c
index d4ee3cb721ea8..f6d3731581ebd 100644
--- a/drivers/usb/phy/phy-jz4770.c
+++ b/drivers/usb/phy/phy-jz4770.c
@@ -176,6 +176,7 @@ static int ingenic_usb_phy_init(struct usb_phy *phy)
 
 	/* Wait for PHY to reset */
 	usleep_range(30, 300);
+	reg = readl(priv->base + REG_USBPCR_OFFSET);
 	writel(reg & ~USBPCR_POR, priv->base + REG_USBPCR_OFFSET);
 	usleep_range(300, 1000);
 
-- 
GitLab


From 23e26d0577535f5ffe4ff8ed6d06e009553c0bca Mon Sep 17 00:00:00 2001
From: Badhri Jagan Sridharan <badhri@google.com>
Date: Mon, 17 Aug 2020 11:46:01 -0700
Subject: [PATCH 0615/1341] usb: typec: tcpm: Fix Fix source hard reset
 response for TDA 2.3.1.1 and TDA 2.3.1.2 failures

The patch addresses the compliance test failures while running  TDA
2.3.1.1 and  TDA 2.3.1.2 of the "PD Communications Engine USB PD
Compliance MOI" test plan published in https://www.usb.org/usbc.
For a product to be Type-C compliant, it's expected that these tests
are run on usb.org certified Type-C compliance tester as mentioned in
https://www.usb.org/usbc.

While the purpose of TDA 2.3.1.1 and  TDA 2.3.1.2 is to verify that
the static and dynamic electrical capabilities of a Source meet the
requirements for each PDO offered,  while doing so, the tests also
monitor that the timing of the VBUS waveform versus the messages meets
the requirements for Hard Reset defined in PROT-PROC-HR-TSTR as
mentioned in step 11 of TDA.2.3.1.1 and step 15 of TDA.2.3.1.2.

TDB.2.2.13.1: PROT-PROC-HR-TSTR Procedure and Checks for Tester
Originated Hard Reset
Purpose: To perform the appropriate protocol checks relating to any
circumstance in which the Hard Reset signal is sent by the Tester.

UUT is behaving as source:
The Tester sends a Hard Reset signal.
1. Check VBUS stays within present valid voltage range for
tPSHardReset min (25ms) after last bit of Hard Reset signal.
[PROT_PROC_HR_TSTR_1]
2. Check that VBUS starts to fall below present valid voltage range by
tPSHardReset max (35ms). [PROT_PROC_HR_TSTR_2]
3. Check that VBUS reaches vSafe0V within tSafe0v max (650 ms).
[PROT_PROC_HR_TSTR_3]
4. Check that VBUS starts rising to vSafe5V after a delay of
tSrcRecover (0.66s - 1s) from reaching vSafe0V. [PROT_PROC_HR_TSTR_4]
5. Check that VBUS reaches vSafe5V within tSrcTurnOn max (275ms) of
rising above vSafe0v max (0.8V). [PROT_PROC_HR_TSTR_5] Power Delivery
Compliance Plan 139 6. Check that Source Capabilities are finished
sending within tFirstSourceCap max (250ms) of VBUS reaching vSafe5v
min. [PROT_PROC_HR_TSTR_6].

This is in line with 7.1.5 Response to Hard Resets of the USB Power
Delivery Specification Revision 3.0, Version 1.2,
"Hard Reset Signaling indicates a communication failure has occurred
and the Source Shall stop driving VCONN, Shall remove Rp from the
VCONN pin and Shall drive VBUS to vSafe0V as shown in Figure 7-9. The
USB connection May reset during a Hard Reset since the VBUS voltage
will be less than vSafe5V for an extended period of time. After
establishing the vSafe0V voltage condition on VBUS, the Source Shall
wait tSrcRecover before re-applying VCONN and restoring VBUS to
vSafe5V. A Source Shall conform to the VCONN timing as specified in
[USB Type-C 1.3]."

With the above guidelines from the spec in mind, TCPM does not turn
off VCONN while entering SRC_HARD_RESET_VBUS_OFF. The patch makes TCPM
turn off VCONN while entering SRC_HARD_RESET_VBUS_OFF and turn it back
on while entering SRC_HARD_RESET_VBUS_ON along with vbus instead of
having VCONN on through hardreset.

Also, the spec clearly states that "After establishing the vSafe0V
voltage condition on VBUS",  the Source Shall wait tSrcRecover before
re-applying VCONN and restoring VBUS to vSafe5V.
TCPM does not conform to this requirement. If the TCPC driver calls
tcpm_vbus_change with vbus off signal, TCPM right away enters
SRC_HARD_RESET_VBUS_ON without waiting for tSrcRecover.
For TCPC's which are buggy/does not call tcpm_vbus_change, TCPM
assumes that the vsafe0v is instantaneous as TCPM only waits
tSrcRecover instead of waiting for tSafe0v + tSrcRecover.
This patch also fixes this behavior by making sure that TCPM waits for
tSrcRecover before transitioning into SRC_HARD_RESET_VBUS_ON when
tcpm_vbus_change is called by TCPC.
When TCPC does not call tcpm_vbus_change, TCPM assumes the worst case
i.e.  tSafe0v + tSrcRecover before transitioning into
SRC_HARD_RESET_VBUS_ON.

Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/r/20200817184601.1899929-1-badhri@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/tcpm/tcpm.c | 28 +++++++++++++++++++++++++---
 1 file changed, 25 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 3ef37202ee375..a48e3f90d1961 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -3372,13 +3372,31 @@ static void run_state_machine(struct tcpm_port *port)
 			tcpm_set_state(port, SNK_HARD_RESET_SINK_OFF, 0);
 		break;
 	case SRC_HARD_RESET_VBUS_OFF:
-		tcpm_set_vconn(port, true);
+		/*
+		 * 7.1.5 Response to Hard Resets
+		 * Hard Reset Signaling indicates a communication failure has occurred and the
+		 * Source Shall stop driving VCONN, Shall remove Rp from the VCONN pin and Shall
+		 * drive VBUS to vSafe0V as shown in Figure 7-9.
+		 */
+		tcpm_set_vconn(port, false);
 		tcpm_set_vbus(port, false);
 		tcpm_set_roles(port, port->self_powered, TYPEC_SOURCE,
 			       tcpm_data_role_for_source(port));
-		tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
+		/*
+		 * If tcpc fails to notify vbus off, TCPM will wait for PD_T_SAFE_0V +
+		 * PD_T_SRC_RECOVER before turning vbus back on.
+		 * From Table 7-12 Sequence Description for a Source Initiated Hard Reset:
+		 * 4. Policy Engine waits tPSHardReset after sending Hard Reset Signaling and then
+		 * tells the Device Policy Manager to instruct the power supply to perform a
+		 * Hard Reset. The transition to vSafe0V Shall occur within tSafe0V (t2).
+		 * 5. After tSrcRecover the Source applies power to VBUS in an attempt to
+		 * re-establish communication with the Sink and resume USB Default Operation.
+		 * The transition to vSafe5V Shall occur within tSrcTurnOn(t4).
+		 */
+		tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SAFE_0V + PD_T_SRC_RECOVER);
 		break;
 	case SRC_HARD_RESET_VBUS_ON:
+		tcpm_set_vconn(port, true);
 		tcpm_set_vbus(port, true);
 		port->tcpc->set_pd_rx(port->tcpc, true);
 		tcpm_set_attached_state(port, true);
@@ -3944,7 +3962,11 @@ static void _tcpm_pd_vbus_off(struct tcpm_port *port)
 		tcpm_set_state(port, SNK_HARD_RESET_WAIT_VBUS, 0);
 		break;
 	case SRC_HARD_RESET_VBUS_OFF:
-		tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, 0);
+		/*
+		 * After establishing the vSafe0V voltage condition on VBUS, the Source Shall wait
+		 * tSrcRecover before re-applying VCONN and restoring VBUS to vSafe5V.
+		 */
+		tcpm_set_state(port, SRC_HARD_RESET_VBUS_ON, PD_T_SRC_RECOVER);
 		break;
 	case HARD_RESET_SEND:
 		break;
-- 
GitLab


From 33f61d725a86e9ae02bf504e9372ba973c010ddc Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Fri, 21 Aug 2020 19:42:55 +0200
Subject: [PATCH 0616/1341] ACPI: OSL: Prevent acpi_release_memory() from
 returning too early

After commit 1757659d022b ("ACPI: OSL: Implement deferred unmapping
of ACPI memory") in some cases acpi_release_memory() may return
before the target memory mappings actually go away, because they
are released asynchronously now.

Prevent it from returning prematurely by making it wait for the next
RCU grace period to elapse, for all of the RCU callbacks to complete
and for all of the scheduled work items to be flushed before
returning.

Fixes: 1757659d022b ("ACPI: OSL: Implement deferred unmapping of ACPI memory")
Reported-by: Kenneth R. Crudup <kenny@panix.com>
Tested-by: Kenneth R. Crudup <kenny@panix.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
 drivers/acpi/osl.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 74486bb5029af..4a0b07792233e 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1575,11 +1575,26 @@ static acpi_status acpi_deactivate_mem_region(acpi_handle handle, u32 level,
 acpi_status acpi_release_memory(acpi_handle handle, struct resource *res,
 				u32 level)
 {
+	acpi_status status;
+
 	if (!(res->flags & IORESOURCE_MEM))
 		return AE_TYPE;
 
-	return acpi_walk_namespace(ACPI_TYPE_REGION, handle, level,
-				   acpi_deactivate_mem_region, NULL, res, NULL);
+	status = acpi_walk_namespace(ACPI_TYPE_REGION, handle, level,
+				     acpi_deactivate_mem_region, NULL,
+				     res, NULL);
+	if (ACPI_FAILURE(status))
+		return status;
+
+	/*
+	 * Wait for all of the mappings queued up for removal by
+	 * acpi_deactivate_mem_region() to actually go away.
+	 */
+	synchronize_rcu();
+	rcu_barrier();
+	flush_scheduled_work();
+
+	return AE_OK;
 }
 EXPORT_SYMBOL_GPL(acpi_release_memory);
 
-- 
GitLab


From e3eb6e8fba65094328b8dca635d00de74ba75b45 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Mon, 24 Aug 2020 19:35:31 +0200
Subject: [PATCH 0617/1341] PM: sleep: core: Fix the handling of pending
 runtime resume requests

It has been reported that system-wide suspend may be aborted in the
absence of any wakeup events due to unforseen interactions of it with
the runtume PM framework.

One failing scenario is when there are multiple devices sharing an
ACPI power resource and runtime-resume needs to be carried out for
one of them during system-wide suspend (for example, because it needs
to be reconfigured before the whole system goes to sleep).  In that
case, the runtime-resume of that device involves turning the ACPI
power resource "on" which in turn causes runtime-resume requests
to be queued up for all of the other devices sharing it.  Those
requests go to the runtime PM workqueue which is frozen during
system-wide suspend, so they are not actually taken care of until
the resume of the whole system, but the pm_runtime_barrier()
call in __device_suspend() sees them and triggers system wakeup
events for them which then cause the system-wide suspend to be
aborted if wakeup source objects are in active use.

Of course, the logic that leads to triggering those wakeup events is
questionable in the first place, because clearly there are cases in
which a pending runtime resume request for a device is not connected
to any real wakeup events in any way (like the one above).  Moreover,
it is racy, because the device may be resuming already by the time
the pm_runtime_barrier() runs and so if the driver doesn't take care
of signaling the wakeup event as appropriate, it will be lost.
However, if the driver does take care of that, the extra
pm_wakeup_event() call in the core is redundant.

Accordingly, drop the conditional pm_wakeup_event() call fron
__device_suspend() and make the latter call pm_runtime_barrier()
alone.  Also modify the comment next to that call to reflect the new
code and extend it to mention the need to avoid unwanted interactions
between runtime PM and system-wide device suspend callbacks.

Fixes: 1e2ef05bb8cf8 ("PM: Limit race conditions between runtime PM and system sleep (v2)")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Reported-by: Utkarsh H Patel <utkarsh.h.patel@intel.com>
Tested-by: Utkarsh H Patel <utkarsh.h.patel@intel.com>
Tested-by: Pengfei Xu <pengfei.xu@intel.com>
Cc: All applicable <stable@vger.kernel.org>
---
 drivers/base/power/main.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 9dd85bea40260..205a06752ca90 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -1606,13 +1606,17 @@ static int __device_suspend(struct device *dev, pm_message_t state, bool async)
 	}
 
 	/*
-	 * If a device configured to wake up the system from sleep states
-	 * has been suspended at run time and there's a resume request pending
-	 * for it, this is equivalent to the device signaling wakeup, so the
-	 * system suspend operation should be aborted.
+	 * Wait for possible runtime PM transitions of the device in progress
+	 * to complete and if there's a runtime resume request pending for it,
+	 * resume it before proceeding with invoking the system-wide suspend
+	 * callbacks for it.
+	 *
+	 * If the system-wide suspend callbacks below change the configuration
+	 * of the device, they must disable runtime PM for it or otherwise
+	 * ensure that its runtime-resume callbacks will not be confused by that
+	 * change in case they are invoked going forward.
 	 */
-	if (pm_runtime_barrier(dev) && device_may_wakeup(dev))
-		pm_wakeup_event(dev, 0);
+	pm_runtime_barrier(dev);
 
 	if (pm_wakeup_pending()) {
 		dev->power.direct_complete = false;
-- 
GitLab


From 8e4efd4706f77d76c99f78f8859e1d61fae5142a Mon Sep 17 00:00:00 2001
From: Sumera Priyadarsini <sylphrenadin@gmail.com>
Date: Tue, 25 Aug 2020 01:33:11 +0530
Subject: [PATCH 0618/1341] net: dsa: mt7530: Add of_node_put() before break
 and return statements

Every iteration of for_each_child_of_node() decrements
the reference count of the previous node, however when control
is transferred from the middle of the loop, as in the case of
a return or break or goto, there is no decrement thus ultimately
resulting in a memory leak.

Fix a potential memory leak in mt7530.c by inserting of_node_put()
before the break and return statements.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/dsa/mt7530.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 8dcb8a49ab67f..4b4701c69fe18 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1326,14 +1326,17 @@ mt7530_setup(struct dsa_switch *ds)
 
 			if (phy_node->parent == priv->dev->of_node->parent) {
 				ret = of_get_phy_mode(mac_np, &interface);
-				if (ret && ret != -ENODEV)
+				if (ret && ret != -ENODEV) {
+					of_node_put(mac_np);
 					return ret;
+				}
 				id = of_mdio_parse_addr(ds->dev, phy_node);
 				if (id == 0)
 					priv->p5_intf_sel = P5_INTF_SEL_PHY_P0;
 				if (id == 4)
 					priv->p5_intf_sel = P5_INTF_SEL_PHY_P4;
 			}
+			of_node_put(mac_np);
 			of_node_put(phy_node);
 			break;
 		}
-- 
GitLab


From e104684108fc8b846dbca889f28257a65a956874 Mon Sep 17 00:00:00 2001
From: Tong Zhang <ztong0001@gmail.com>
Date: Mon, 24 Aug 2020 18:08:06 -0400
Subject: [PATCH 0619/1341] net: caif: fix error code handling

cfpkt_peek_head return 0 and 1, caller is checking error using <0

Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/caif/cfrfml.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/caif/cfrfml.c b/net/caif/cfrfml.c
index ce2767e9cec65..7b0af33bdb97f 100644
--- a/net/caif/cfrfml.c
+++ b/net/caif/cfrfml.c
@@ -116,7 +116,7 @@ static int cfrfml_receive(struct cflayer *layr, struct cfpkt *pkt)
 	if (segmented) {
 		if (rfml->incomplete_frm == NULL) {
 			/* Initial Segment */
-			if (cfpkt_peek_head(pkt, rfml->seghead, 6) < 0)
+			if (cfpkt_peek_head(pkt, rfml->seghead, 6) != 0)
 				goto out;
 
 			rfml->pdu_size = get_unaligned_le16(rfml->seghead+4);
@@ -233,7 +233,7 @@ static int cfrfml_transmit(struct cflayer *layr, struct cfpkt *pkt)
 	if (cfpkt_getlen(pkt) > rfml->fragment_size + RFM_HEAD_SIZE)
 		err = cfpkt_peek_head(pkt, head, 6);
 
-	if (err < 0)
+	if (err != 0)
 		goto out;
 
 	while (cfpkt_getlen(frontpkt) > rfml->fragment_size + RFM_HEAD_SIZE) {
-- 
GitLab


From 99d469fc64d06f0c81c0fe2a1c01645a67e0cbf0 Mon Sep 17 00:00:00 2001
From: Murali Karicheri <m-karicheri2@ti.com>
Date: Mon, 24 Aug 2020 11:10:52 -0400
Subject: [PATCH 0620/1341] net: ethernet: ti: cpsw: fix clean up of vlan mc
 entries for host port

To flush the vid + mc entries from ALE, which is required when a VLAN
interface is removed, driver needs to call cpsw_ale_flush_multicast()
with ALE_PORT_HOST for port mask as these entries are added only for
host port. Without this, these entries remain in the ALE table even
after removing the VLAN interface. cpsw_ale_flush_multicast() calls
cpsw_ale_flush_mcast which expects a port mask to do the job.

Fixes: 15180eca569b ("net: ethernet: ti: cpsw: fix vlan mcast")
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/ti/cpsw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 9b17bbbe102fe..4a65edc5a3759 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -1116,7 +1116,7 @@ static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
 				  HOST_PORT_NUM, ALE_VLAN, vid);
 	ret |= cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
 				  0, ALE_VLAN, vid);
-	ret |= cpsw_ale_flush_multicast(cpsw->ale, 0, vid);
+	ret |= cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
 err:
 	pm_runtime_put(cpsw->dev);
 	return ret;
-- 
GitLab


From 2c6500e82e5190b038f0b79f85a20da55bdd4b86 Mon Sep 17 00:00:00 2001
From: Murali Karicheri <m-karicheri2@ti.com>
Date: Mon, 24 Aug 2020 11:10:53 -0400
Subject: [PATCH 0621/1341] net: ethernet: ti: cpsw_new: fix clean up of vlan
 mc entries for host port

To flush the vid + mc entries from ALE, which is required when a VLAN
interface is removed, driver needs to call cpsw_ale_flush_multicast()
with ALE_PORT_HOST for port mask as these entries are added only for
host port. Without this, these entries remain in the ALE table even
after removing the VLAN interface. cpsw_ale_flush_multicast() calls
cpsw_ale_flush_mcast which expects a port mask to do the job.

Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/ti/cpsw_new.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ti/cpsw_new.c b/drivers/net/ethernet/ti/cpsw_new.c
index 1247d35d42ef3..8d0a2bc7128d4 100644
--- a/drivers/net/ethernet/ti/cpsw_new.c
+++ b/drivers/net/ethernet/ti/cpsw_new.c
@@ -1044,7 +1044,7 @@ static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
 			   HOST_PORT_NUM, ALE_VLAN, vid);
 	cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
 			   0, ALE_VLAN, vid);
-	cpsw_ale_flush_multicast(cpsw->ale, 0, vid);
+	cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
 err:
 	pm_runtime_put(cpsw->dev);
 	return ret;
-- 
GitLab


From 7ad26d6671db758c959d7e1d100b138a38483612 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Tue, 25 Aug 2020 08:39:24 +0900
Subject: [PATCH 0622/1341] ASoC: pcm3168a: ignore 0 Hz settings

Some sound card try to set 0 Hz as reset, but it is impossible.
This patch ignores it to avoid error return.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87a6yjy5sy.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/pcm3168a.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/soc/codecs/pcm3168a.c b/sound/soc/codecs/pcm3168a.c
index 5e445fee4ef57..821e7395f90f6 100644
--- a/sound/soc/codecs/pcm3168a.c
+++ b/sound/soc/codecs/pcm3168a.c
@@ -306,6 +306,13 @@ static int pcm3168a_set_dai_sysclk(struct snd_soc_dai *dai,
 	struct pcm3168a_priv *pcm3168a = snd_soc_component_get_drvdata(dai->component);
 	int ret;
 
+	/*
+	 * Some sound card sets 0 Hz as reset,
+	 * but it is impossible to set. Ignore it here
+	 */
+	if (freq == 0)
+		return 0;
+
 	if (freq > PCM3168A_MAX_SYSCLK)
 		return -EINVAL;
 
-- 
GitLab


From d062085d61b1c2015845d1d9c475266381cce785 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Tue, 25 Aug 2020 08:38:54 +0900
Subject: [PATCH 0623/1341] ASoC: ti: fixup ams_delta_mute() function name

commit 059374fe9ea5d ("ASoC: ti: merge .digital_mute() into .mute_stream()")
merged .digital_mute() into .mute_stream().
But it didn't rename ams_delta_digital_mute() to ams_delta_mute().
This patch fixup it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/87blizy5ts.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/ti/ams-delta.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/ti/ams-delta.c b/sound/soc/ti/ams-delta.c
index 5c47de96c5298..57feb473a579c 100644
--- a/sound/soc/ti/ams-delta.c
+++ b/sound/soc/ti/ams-delta.c
@@ -446,12 +446,12 @@ static const struct snd_soc_dai_ops ams_delta_dai_ops = {
 /* Will be used if the codec ever has its own digital_mute function */
 static int ams_delta_startup(struct snd_pcm_substream *substream)
 {
-	return ams_delta_digital_mute(NULL, 0, substream->stream);
+	return ams_delta_mute(NULL, 0, substream->stream);
 }
 
 static void ams_delta_shutdown(struct snd_pcm_substream *substream)
 {
-	ams_delta_digital_mute(NULL, 1, substream->stream);
+	ams_delta_mute(NULL, 1, substream->stream);
 }
 
 
-- 
GitLab


From 6b7898eb180df12767933466b7855b23103ad489 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 25 Aug 2020 07:58:00 -0600
Subject: [PATCH 0624/1341] io_uring: fix imbalanced sqo_mm accounting

We do the initial accounting of locked_vm and pinned_vm before we have
setup ctx->sqo_mm, which means we can end up having not accounted the
memory at setup time, but still decrement it when we exit. This causes
an imbalance in the accounting.

Setup ctx->sqo_mm earlier in io_uring_create(), before we do the first
accounting of mm->{locked,pinned}_vm. This also unifies the state
grabbing for the ctx, and eliminates a failure case in
io_sq_offload_start().

Fixes: f74441e6311a ("io_uring: account locked memory before potential error case")
Reported-by: Robert M. Muncrief <rmuncrief@humanavance.com>
Reported-by: Niklas Schnelle <schnelle@linux.ibm.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Tested-by: Robert M. Muncrief <rmuncrief@humanavance.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index e030b33fa53e1..384df86dfc692 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7447,9 +7447,6 @@ static int io_sq_offload_start(struct io_ring_ctx *ctx,
 {
 	int ret;
 
-	mmgrab(current->mm);
-	ctx->sqo_mm = current->mm;
-
 	if (ctx->flags & IORING_SETUP_SQPOLL) {
 		ret = -EPERM;
 		if (!capable(CAP_SYS_ADMIN))
@@ -7494,10 +7491,6 @@ static int io_sq_offload_start(struct io_ring_ctx *ctx,
 	return 0;
 err:
 	io_finish_async(ctx);
-	if (ctx->sqo_mm) {
-		mmdrop(ctx->sqo_mm);
-		ctx->sqo_mm = NULL;
-	}
 	return ret;
 }
 
@@ -8547,6 +8540,9 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p,
 	ctx->user = user;
 	ctx->creds = get_current_cred();
 
+	mmgrab(current->mm);
+	ctx->sqo_mm = current->mm;
+
 	/*
 	 * Account memory _before_ installing the file descriptor. Once
 	 * the descriptor is installed, it can get closed at any time. Also
-- 
GitLab


From 9dab14b81807a40dab8e464ec87043935c562c2c Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 25 Aug 2020 12:27:50 -0600
Subject: [PATCH 0625/1341] io_uring: don't use poll handler if file can't be
 nonblocking read/written

There's no point in using the poll handler if we can't do a nonblocking
IO attempt of the operation, since we'll need to go async anyway. In
fact this is actively harmful, as reading from eg pipes won't return 0
to indicate EOF.

Cc: stable@vger.kernel.org # v5.7+
Reported-by: Benedikt Ames <wisp3rwind@posteo.eu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 384df86dfc692..d15139088e4c1 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -4889,12 +4889,20 @@ static bool io_arm_poll_handler(struct io_kiocb *req)
 	struct async_poll *apoll;
 	struct io_poll_table ipt;
 	__poll_t mask, ret;
+	int rw;
 
 	if (!req->file || !file_can_poll(req->file))
 		return false;
 	if (req->flags & REQ_F_POLLED)
 		return false;
-	if (!def->pollin && !def->pollout)
+	if (def->pollin)
+		rw = READ;
+	else if (def->pollout)
+		rw = WRITE;
+	else
+		return false;
+	/* if we can't nonblock try, then no point in arming a poll handler */
+	if (!io_file_supports_async(req->file, rw))
 		return false;
 
 	apoll = kmalloc(sizeof(*apoll), GFP_ATOMIC);
-- 
GitLab


From 00d23d516e2e7900cd1bd577c1f84794ae7ff3a7 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Tue, 25 Aug 2020 12:59:22 -0600
Subject: [PATCH 0626/1341] io_uring: ensure read requests go through
 -ERESTART* transformation

We need to call kiocb_done() for any ret < 0 to ensure that we always
get the proper -ERESTARTSYS (and friends) transformation done.

At some point this should be tied into general error handling, so we
can get rid of the various (mostly network) related commands that check
and perform this substitution.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index d15139088e4c1..d9b88644d5e8a 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3160,7 +3160,8 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
 			goto out_free;
 		return -EAGAIN;
 	} else if (ret < 0) {
-		goto out_free;
+		/* make sure -ERESTARTSYS -> -EINTR is done */
+		goto done;
 	}
 
 	/* read it all, or we did blocking attempt. no retry. */
-- 
GitLab


From 2ea370a9173f4a3c80b24221049359a5d1518bc0 Mon Sep 17 00:00:00 2001
From: Vignesh Raghavendra <vigneshr@ti.com>
Date: Tue, 25 Aug 2020 22:55:06 +0530
Subject: [PATCH 0627/1341] spi: spi-cadence-quadspi: Populate get_name()
 interface

Implement get_name() interface of spi_controller_mem_ops so as to avoid
changing of mtd->name due to driver being moved over to spi-mem
framework from SPI NOR. This avoids breaking of MTD cmdline args being
passed by bootloaders which maybe using old driver name.

Fixes: 31fb632b5d43c ("spi: Move cadence-quadspi driver to drivers/spi/")
Reported-by: Jan Kiszka <jan.kiszka@siemens.com>
Suggested-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20200825172506.14375-1-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-cadence-quadspi.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 1c1a9d17eec0d..508b219eabf80 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -1128,8 +1128,17 @@ static int cqspi_request_mmap_dma(struct cqspi_st *cqspi)
 	return 0;
 }
 
+static const char *cqspi_get_name(struct spi_mem *mem)
+{
+	struct cqspi_st *cqspi = spi_master_get_devdata(mem->spi->master);
+	struct device *dev = &cqspi->pdev->dev;
+
+	return devm_kasprintf(dev, GFP_KERNEL, "%s.%d", dev_name(dev), mem->spi->chip_select);
+}
+
 static const struct spi_controller_mem_ops cqspi_mem_ops = {
 	.exec_op = cqspi_exec_mem_op,
+	.get_name = cqspi_get_name,
 };
 
 static int cqspi_setup_flash(struct cqspi_st *cqspi)
-- 
GitLab


From 9f13457377907fa253aef560e1a37e1ca4197f9b Mon Sep 17 00:00:00 2001
From: Mingming Cao <mmc@linux.vnet.ibm.com>
Date: Tue, 25 Aug 2020 13:26:41 -0400
Subject: [PATCH 0628/1341] ibmvnic fix NULL tx_pools and rx_tools issue at
 do_reset

At the time of do_rest, ibmvnic tries to re-initalize the tx_pools
and rx_pools to avoid re-allocating the long term buffer. However
there is a window inside do_reset that the tx_pools and
rx_pools were freed before re-initialized making it possible to deference
null pointers.

This patch fix this issue by always check the tx_pool
and rx_pool are not NULL after ibmvnic_login. If so, re-allocating
the pools. This will avoid getting into calling reset_tx/rx_pools with
NULL adapter tx_pools/rx_pools pointer. Also add null pointer check in
reset_tx_pools and reset_rx_pools to safe handle NULL pointer case.

Signed-off-by: Mingming Cao <mmc@linux.vnet.ibm.com>
Signed-off-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/ibm/ibmvnic.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 5afb3c9c52d20..d3a774331afc7 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -479,6 +479,9 @@ static int reset_rx_pools(struct ibmvnic_adapter *adapter)
 	int i, j, rc;
 	u64 *size_array;
 
+	if (!adapter->rx_pool)
+		return -1;
+
 	size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
 		be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
 
@@ -649,6 +652,9 @@ static int reset_tx_pools(struct ibmvnic_adapter *adapter)
 	int tx_scrqs;
 	int i, rc;
 
+	if (!adapter->tx_pool)
+		return -1;
+
 	tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
 	for (i = 0; i < tx_scrqs; i++) {
 		rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
@@ -2011,7 +2017,10 @@ static int do_reset(struct ibmvnic_adapter *adapter,
 		    adapter->req_rx_add_entries_per_subcrq !=
 		    old_num_rx_slots ||
 		    adapter->req_tx_entries_per_subcrq !=
-		    old_num_tx_slots) {
+		    old_num_tx_slots ||
+		    !adapter->rx_pool ||
+		    !adapter->tso_pool ||
+		    !adapter->tx_pool) {
 			release_rx_pools(adapter);
 			release_tx_pools(adapter);
 			release_napi(adapter);
@@ -2024,10 +2033,14 @@ static int do_reset(struct ibmvnic_adapter *adapter,
 		} else {
 			rc = reset_tx_pools(adapter);
 			if (rc)
+				netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n",
+						rc);
 				goto out;
 
 			rc = reset_rx_pools(adapter);
 			if (rc)
+				netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n",
+						rc);
 				goto out;
 		}
 		ibmvnic_disable_irqs(adapter);
-- 
GitLab


From 460f26d3ee70ec25b3bf8d08e0c79936212d36b6 Mon Sep 17 00:00:00 2001
From: Gurchetan Singh <gurchetansingh@chromium.org>
Date: Mon, 15 Jun 2020 16:05:00 -0700
Subject: [PATCH 0629/1341] drm/virtio: Revert "drm/virtio: Call the right
 shmem helpers"

This reverts commit d323bb44e4d23802eb25d13de1f93f2335bd60d0.

Fixes a double-free regression:

[    4.357928]  drm_gem_shmem_free_object+0xb4/0x100
[    4.358983]  virtio_gpu_dequeue_ctrl_func+0xd9/0x290
[    4.360343]  process_one_work+0x1d2/0x3a0
[    4.361581]  worker_thread+0x45/0x3c0
[    4.362645]  kthread+0xf6/0x130
[    4.363543]  ? process_one_work+0x3a0/0x3a0
[    4.364770]  ? kthread_park+0x80/0x80
[    4.365799]  ret_from_fork+0x35/0x40
[    4.367103] Modules linked in:
[    4.367958] CR2: 0000000000000018
[    4.368857] ---[ end trace db84f7a2974d5c79 ]---
[    4.370118] RIP: 0010:dma_direct_unmap_sg+0x1f/0x60

In addition, virtio has it's own set of dma-ops so there's not an
obviously clean way to transition to shmem helpers.

Fixes: d323bb44e4d2 ("drm/virtio: Call the right shmem helpers")
Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20200615230500.551-1-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit 51c3b0cc32d2e17581fce5b487ee95bbe9e8270a)
---
 drivers/gpu/drm/virtio/virtgpu_object.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_object.c b/drivers/gpu/drm/virtio/virtgpu_object.c
index e83651b7747d5..842f8b61aa897 100644
--- a/drivers/gpu/drm/virtio/virtgpu_object.c
+++ b/drivers/gpu/drm/virtio/virtgpu_object.c
@@ -151,7 +151,13 @@ static int virtio_gpu_object_shmem_init(struct virtio_gpu_device *vgdev,
 	if (ret < 0)
 		return -EINVAL;
 
-	shmem->pages = drm_gem_shmem_get_pages_sgt(&bo->base.base);
+	/*
+	 * virtio_gpu uses drm_gem_shmem_get_sg_table instead of
+	 * drm_gem_shmem_get_pages_sgt because virtio has it's own set of
+	 * dma-ops. This is discouraged for other drivers, but should be fine
+	 * since virtio_gpu doesn't support dma-buf import from other devices.
+	 */
+	shmem->pages = drm_gem_shmem_get_sg_table(&bo->base.base);
 	if (!shmem->pages) {
 		drm_gem_shmem_unpin(&bo->base.base);
 		return -EINVAL;
-- 
GitLab


From d4035d104313cc43b34381b585a7407f069a5132 Mon Sep 17 00:00:00 2001
From: Marek Szyprowski <m.szyprowski@samsung.com>
Date: Mon, 13 Jul 2020 09:07:08 +0200
Subject: [PATCH 0630/1341] drm/exynos: gem: Fix sparse warning

kvaddr element of the exynos_gem object points to a memory buffer, thus
it should not have a __iomem annotation. Then, to avoid a warning or
casting on assignment to fbi structure, the screen_buffer element of the
union should be used instead of the screen_base.

Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
---
 drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 2 +-
 drivers/gpu/drm/exynos/exynos_drm_gem.h   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
index 56a2b47e1af79..5147f5929be72 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c
@@ -92,7 +92,7 @@ static int exynos_drm_fbdev_update(struct drm_fb_helper *helper,
 	offset = fbi->var.xoffset * fb->format->cpp[0];
 	offset += fbi->var.yoffset * fb->pitches[0];
 
-	fbi->screen_base = exynos_gem->kvaddr + offset;
+	fbi->screen_buffer = exynos_gem->kvaddr + offset;
 	fbi->screen_size = size;
 	fbi->fix.smem_len = size;
 
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h
index 7445748288da9..74e926abeff0c 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -40,7 +40,7 @@ struct exynos_drm_gem {
 	unsigned int		flags;
 	unsigned long		size;
 	void			*cookie;
-	void __iomem		*kvaddr;
+	void			*kvaddr;
 	dma_addr_t		dma_addr;
 	unsigned long		dma_attrs;
 	struct sg_table		*sgt;
-- 
GitLab


From 7c5b892e0871655fea3294ffac6fa3cc3400b60d Mon Sep 17 00:00:00 2001
From: Joshua Sivec <sivec@posteo.net>
Date: Tue, 25 Aug 2020 18:55:18 +0200
Subject: [PATCH 0631/1341] ALSA: usb-audio: Add implicit feedback quirk for
 UR22C

This uses the same quirk as the Motu and SSL2 devices.
Tested on the UR22C.

Fixes bug 208851.

Signed-off-by: Joshua Sivec <sivec@posteo.net>
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208851
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200825165515.8239-1-sivec@posteo.net
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/pcm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 5600751803cfe..10d342270dd9b 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -369,6 +369,7 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 	case USB_ID(0x07fd, 0x0008): /* MOTU M Series */
 	case USB_ID(0x31e9, 0x0001): /* Solid State Logic SSL2 */
 	case USB_ID(0x31e9, 0x0002): /* Solid State Logic SSL2+ */
+	case USB_ID(0x0499, 0x172f): /* Steinberg UR22C */
 	case USB_ID(0x0d9a, 0x00df): /* RTX6001 */
 		ep = 0x81;
 		ifnum = 2;
-- 
GitLab


From 14335d8b9e1a2bf006f9d969a103f9731cabb210 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Franti=C5=A1ek=20Ku=C4=8Dera?= <franta-linux@frantovo.cz>
Date: Tue, 25 Aug 2020 17:31:13 +0200
Subject: [PATCH 0632/1341] ALSA: usb-audio: Add basic capture support for
 Pioneer DJ DJM-250MK2
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This patch extends support for DJM-250MK2 and allows recording.
However, DVS is not possible yet (see the comment in code).

Signed-off-by: František Kučera <franta-linux@frantovo.cz>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200825153113.6352-1-konference@frantovo.cz
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/pcm.c          |  1 +
 sound/usb/quirks-table.h | 60 +++++++++++++++++++++++++++++++++++-----
 sound/usb/quirks.c       |  1 +
 3 files changed, 55 insertions(+), 7 deletions(-)

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c
index 10d342270dd9b..b401ee894e1bb 100644
--- a/sound/usb/pcm.c
+++ b/sound/usb/pcm.c
@@ -375,6 +375,7 @@ static int set_sync_ep_implicit_fb_quirk(struct snd_usb_substream *subs,
 		ifnum = 2;
 		goto add_sync_ep_from_ifnum;
 	case USB_ID(0x2b73, 0x000a): /* Pioneer DJ DJM-900NXS2 */
+	case USB_ID(0x2b73, 0x0017): /* Pioneer DJ DJM-250MK2 */
 		ep = 0x82;
 		ifnum = 0;
 		goto add_sync_ep_from_ifnum;
diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index 416de71c6895d..23eafd50126f3 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -3559,14 +3559,40 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
 {
 	/*
 	 * Pioneer DJ DJM-250MK2
-	 * PCM is 8 channels out @ 48 fixed (endpoints 0x01).
-	 * The output from computer to the mixer is usable.
+	 * PCM is 8 channels out @ 48 fixed (endpoint 0x01)
+	 * and 8 channels in @ 48 fixed (endpoint 0x82).
 	 *
-	 * The input (phono or line to computer) is not working.
-	 * It should be at endpoint 0x82 and probably also 8 channels,
-	 * but it seems that it works only with Pioneer proprietary software.
-	 * Even on officially supported OS, the Audacity was unable to record
-	 * and Mixxx to recognize the control vinyls.
+	 * Both playback and recording is working, even simultaneously.
+	 *
+	 * Playback channels could be mapped to:
+	 *  - CH1
+	 *  - CH2
+	 *  - AUX
+	 *
+	 * Recording channels could be mapped to:
+	 *  - Post CH1 Fader
+	 *  - Post CH2 Fader
+	 *  - Cross Fader A
+	 *  - Cross Fader B
+	 *  - MIC
+	 *  - AUX
+	 *  - REC OUT
+	 *
+	 * There is remaining problem with recording directly from PHONO/LINE.
+	 * If we map a channel to:
+	 *  - CH1 Control Tone PHONO
+	 *  - CH1 Control Tone LINE
+	 *  - CH2 Control Tone PHONO
+	 *  - CH2 Control Tone LINE
+	 * it is silent.
+	 * There is no signal even on other operating systems with official drivers.
+	 * The signal appears only when a supported application is started.
+	 * This needs to be investigated yet...
+	 * (there is quite a lot communication on the USB in both directions)
+	 *
+	 * In current version this mixer could be used for playback
+	 * and for recording from vinyls (through Post CH* Fader)
+	 * but not for DVS (Digital Vinyl Systems) like in Mixxx.
 	 */
 	USB_DEVICE_VENDOR_SPEC(0x2b73, 0x0017),
 	.driver_info = (unsigned long) &(const struct snd_usb_audio_quirk) {
@@ -3590,6 +3616,26 @@ AU0828_DEVICE(0x2040, 0x7270, "Hauppauge", "HVR-950Q"),
 					.rate_max = 48000,
 					.nr_rates = 1,
 					.rate_table = (unsigned int[]) { 48000 }
+					}
+			},
+			{
+				.ifnum = 0,
+				.type = QUIRK_AUDIO_FIXED_ENDPOINT,
+				.data = &(const struct audioformat) {
+					.formats = SNDRV_PCM_FMTBIT_S24_3LE,
+					.channels = 8, // inputs
+					.iface = 0,
+					.altsetting = 1,
+					.altset_idx = 1,
+					.endpoint = 0x82,
+					.ep_attr = USB_ENDPOINT_XFER_ISOC|
+						USB_ENDPOINT_SYNC_ASYNC|
+						USB_ENDPOINT_USAGE_IMPLICIT_FB,
+					.rates = SNDRV_PCM_RATE_48000,
+					.rate_min = 48000,
+					.rate_max = 48000,
+					.nr_rates = 1,
+					.rate_table = (unsigned int[]) { 48000 }
 				}
 			},
 			{
diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index b800fd92106c7..75bbdc6912433 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1503,6 +1503,7 @@ void snd_usb_set_format_quirk(struct snd_usb_substream *subs,
 		set_format_emu_quirk(subs, fmt);
 		break;
 	case USB_ID(0x2b73, 0x000a): /* Pioneer DJ DJM-900NXS2 */
+	case USB_ID(0x2b73, 0x0017): /* Pioneer DJ DJM-250MK2 */
 		pioneer_djm_set_format_quirk(subs);
 		break;
 	case USB_ID(0x534d, 0x2109): /* MacroSilicon MS2109 */
-- 
GitLab


From 8bcea6cb2cbc1f749e574954569323dec5e2920e Mon Sep 17 00:00:00 2001
From: Adrien Crivelli <adrien.crivelli@gmail.com>
Date: Wed, 26 Aug 2020 17:40:14 +0900
Subject: [PATCH 0633/1341] ALSA: hda/realtek: Add quirk for Samsung Galaxy
 Book Ion NT950XCJ-X716A

The Galaxy Book Ion NT950XCJ-X716A (15 inches) uses the same ALC298
codec as other Samsung laptops which have the no headphone sound bug. I
confirmed on my own hardware that this fixes the bug.

This also correct the model name for the 13 inches version. It was
incorrectly referenced as NT950XCJ-X716A in commit e17f02d05. But it
should have been NP930XCJ-K01US.

Fixes: e17f02d0559c ("ALSA: hda/realtek: Add quirk for Samsung Galaxy Book Ion")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207423
Signed-off-by: Adrien Crivelli <adrien.crivelli@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200826084014.211217-1-adrien.crivelli@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_realtek.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index a1fa983d2a942..98789691a479d 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -7695,7 +7695,8 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x144d, 0xc169, "Samsung Notebook 9 Pen (NP930SBE-K01US)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x144d, 0xc176, "Samsung Notebook 9 Pro (NP930MBE-K04US)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x144d, 0xc189, "Samsung Galaxy Flex Book (NT950QCG-X716)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
-	SND_PCI_QUIRK(0x144d, 0xc18a, "Samsung Galaxy Book Ion (NT950XCJ-X716A)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
+	SND_PCI_QUIRK(0x144d, 0xc18a, "Samsung Galaxy Book Ion (NP930XCJ-K01US)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
+	SND_PCI_QUIRK(0x144d, 0xc830, "Samsung Galaxy Book Ion (NT950XCJ-X716A)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x144d, 0xc740, "Samsung Ativ book 8 (NP870Z5G)", ALC269_FIXUP_ATIV_BOOK_8),
 	SND_PCI_QUIRK(0x144d, 0xc812, "Samsung Notebook Pen S (NT950SBE-X58)", ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET),
 	SND_PCI_QUIRK(0x1458, 0xfa53, "Gigabyte BXBT-2807", ALC283_FIXUP_HEADSET_MIC),
-- 
GitLab


From c94a88f341c9b8f05d8639f62bb5d95936f881cd Mon Sep 17 00:00:00 2001
From: Marco Elver <elver@google.com>
Date: Thu, 20 Aug 2020 19:20:46 +0200
Subject: [PATCH 0634/1341] sched: Use __always_inline on is_idle_task()

is_idle_task() may be used from noinstr functions such as
irqentry_enter(). Since the compiler is free to not inline regular
inline functions, switch to using __always_inline.

Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200820172046.GA177701@elver.google.com
---
 include/linux/sched.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 93ecd930efd31..afe01e232935f 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1666,7 +1666,7 @@ extern struct task_struct *idle_task(int cpu);
  *
  * Return: 1 if @p is an idle task. 0 otherwise.
  */
-static inline bool is_idle_task(const struct task_struct *p)
+static __always_inline bool is_idle_task(const struct task_struct *p)
 {
 	return !!(p->flags & PF_IDLE);
 }
-- 
GitLab


From fddf9055a60dfcc97bda5ef03c8fa4108ed555c5 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 20 Aug 2020 09:13:30 +0200
Subject: [PATCH 0635/1341] lockdep: Use raw_cpu_*() for per-cpu variables

Sven reported that commit a21ee6055c30 ("lockdep: Change
hardirq{s_enabled,_context} to per-cpu variables") caused trouble on
s390 because their this_cpu_*() primitives disable preemption which
then lands back tracing.

On the one hand, per-cpu ops should use preempt_*able_notrace() and
raw_local_irq_*(), on the other hand, we can trivialy use raw_cpu_*()
ops for this.

Fixes: a21ee6055c30 ("lockdep: Change hardirq{s_enabled,_context} to per-cpu variables")
Reported-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200821085348.192346882@infradead.org
---
 include/linux/irqflags.h |  6 +++---
 include/linux/lockdep.h  | 18 +++++++++++++-----
 kernel/locking/lockdep.c |  4 ++--
 3 files changed, 18 insertions(+), 10 deletions(-)

diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h
index bd5c55755447c..d7e50a215ea98 100644
--- a/include/linux/irqflags.h
+++ b/include/linux/irqflags.h
@@ -53,13 +53,13 @@ DECLARE_PER_CPU(int, hardirq_context);
   extern void trace_hardirqs_off_finish(void);
   extern void trace_hardirqs_on(void);
   extern void trace_hardirqs_off(void);
-# define lockdep_hardirq_context()	(this_cpu_read(hardirq_context))
+# define lockdep_hardirq_context()	(raw_cpu_read(hardirq_context))
 # define lockdep_softirq_context(p)	((p)->softirq_context)
 # define lockdep_hardirqs_enabled()	(this_cpu_read(hardirqs_enabled))
 # define lockdep_softirqs_enabled(p)	((p)->softirqs_enabled)
 # define lockdep_hardirq_enter()			\
 do {							\
-	if (this_cpu_inc_return(hardirq_context) == 1)	\
+	if (__this_cpu_inc_return(hardirq_context) == 1)\
 		current->hardirq_threaded = 0;		\
 } while (0)
 # define lockdep_hardirq_threaded()		\
@@ -68,7 +68,7 @@ do {						\
 } while (0)
 # define lockdep_hardirq_exit()			\
 do {						\
-	this_cpu_dec(hardirq_context);		\
+	__this_cpu_dec(hardirq_context);	\
 } while (0)
 # define lockdep_softirq_enter()		\
 do {						\
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 62a382d1845bd..6a584b3e5c74f 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -535,19 +535,27 @@ do {									\
 DECLARE_PER_CPU(int, hardirqs_enabled);
 DECLARE_PER_CPU(int, hardirq_context);
 
+/*
+ * The below lockdep_assert_*() macros use raw_cpu_read() to access the above
+ * per-cpu variables. This is required because this_cpu_read() will potentially
+ * call into preempt/irq-disable and that obviously isn't right. This is also
+ * correct because when IRQs are enabled, it doesn't matter if we accidentally
+ * read the value from our previous CPU.
+ */
+
 #define lockdep_assert_irqs_enabled()					\
 do {									\
-	WARN_ON_ONCE(debug_locks && !this_cpu_read(hardirqs_enabled));	\
+	WARN_ON_ONCE(debug_locks && !raw_cpu_read(hardirqs_enabled));	\
 } while (0)
 
 #define lockdep_assert_irqs_disabled()					\
 do {									\
-	WARN_ON_ONCE(debug_locks && this_cpu_read(hardirqs_enabled));	\
+	WARN_ON_ONCE(debug_locks && raw_cpu_read(hardirqs_enabled));	\
 } while (0)
 
 #define lockdep_assert_in_irq()						\
 do {									\
-	WARN_ON_ONCE(debug_locks && !this_cpu_read(hardirq_context));	\
+	WARN_ON_ONCE(debug_locks && !raw_cpu_read(hardirq_context));	\
 } while (0)
 
 #define lockdep_assert_preemption_enabled()				\
@@ -555,7 +563,7 @@ do {									\
 	WARN_ON_ONCE(IS_ENABLED(CONFIG_PREEMPT_COUNT)	&&		\
 		     debug_locks			&&		\
 		     (preempt_count() != 0		||		\
-		      !this_cpu_read(hardirqs_enabled)));		\
+		      !raw_cpu_read(hardirqs_enabled)));		\
 } while (0)
 
 #define lockdep_assert_preemption_disabled()				\
@@ -563,7 +571,7 @@ do {									\
 	WARN_ON_ONCE(IS_ENABLED(CONFIG_PREEMPT_COUNT)	&&		\
 		     debug_locks			&&		\
 		     (preempt_count() == 0		&&		\
-		      this_cpu_read(hardirqs_enabled)));		\
+		      raw_cpu_read(hardirqs_enabled)));			\
 } while (0)
 
 #else
diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 2fad21d345b0e..c872e95e6e4d1 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -3756,7 +3756,7 @@ void noinstr lockdep_hardirqs_on(unsigned long ip)
 
 skip_checks:
 	/* we'll do an OFF -> ON transition: */
-	this_cpu_write(hardirqs_enabled, 1);
+	__this_cpu_write(hardirqs_enabled, 1);
 	trace->hardirq_enable_ip = ip;
 	trace->hardirq_enable_event = ++trace->irq_events;
 	debug_atomic_inc(hardirqs_on_events);
@@ -3795,7 +3795,7 @@ void noinstr lockdep_hardirqs_off(unsigned long ip)
 		/*
 		 * We have done an ON -> OFF transition:
 		 */
-		this_cpu_write(hardirqs_enabled, 0);
+		__this_cpu_write(hardirqs_enabled, 0);
 		trace->hardirq_disable_ip = ip;
 		trace->hardirq_disable_event = ++trace->irq_events;
 		debug_atomic_inc(hardirqs_off_events);
-- 
GitLab


From 49d9c5936314e44d314c605c39cce0fd947f9c3a Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 20 Aug 2020 16:47:24 +0200
Subject: [PATCH 0636/1341] cpuidle: Fixup IRQ state

Match the pattern elsewhere in this file.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200821085348.251340558@infradead.org
---
 drivers/cpuidle/cpuidle.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 87197319ab069..2fe4f3cdf54d7 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -153,7 +153,8 @@ static void enter_s2idle_proper(struct cpuidle_driver *drv,
 	 */
 	stop_critical_timings();
 	drv->states[index].enter_s2idle(dev, drv, index);
-	WARN_ON(!irqs_disabled());
+	if (WARN_ON_ONCE(!irqs_disabled()))
+		local_irq_disable();
 	/*
 	 * timekeeping_resume() that will be called by tick_unfreeze() for the
 	 * first CPU executing it calls functions containing RCU read-side
-- 
GitLab


From 1098582a0f6c4e8fd28da0a6305f9233d02c9c1d Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 7 Aug 2020 20:50:19 +0200
Subject: [PATCH 0637/1341] sched,idle,rcu: Push rcu_idle deeper into the idle
 path

Lots of things take locks, due to a wee bug, rcu_lockdep didn't notice
that the locking tracepoints were using RCU.

Push rcu_idle_{enter,exit}() as deep as possible into the idle paths,
this also resolves a lot of _rcuidle()/RCU_NONIDLE() usage.

Specifically, sched_clock_idle_wakeup_event() will use ktime which
will use seqlocks which will tickle lockdep, and
stop_critical_timings() uses lock.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200821085348.310943801@infradead.org
---
 drivers/cpuidle/cpuidle.c | 12 ++++++++----
 kernel/sched/idle.c       | 22 ++++++++--------------
 2 files changed, 16 insertions(+), 18 deletions(-)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 2fe4f3cdf54d7..9bcda4153d3bb 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -145,13 +145,14 @@ static void enter_s2idle_proper(struct cpuidle_driver *drv,
 	 * executing it contains RCU usage regarded as invalid in the idle
 	 * context, so tell RCU about that.
 	 */
-	RCU_NONIDLE(tick_freeze());
+	tick_freeze();
 	/*
 	 * The state used here cannot be a "coupled" one, because the "coupled"
 	 * cpuidle mechanism enables interrupts and doing that with timekeeping
 	 * suspended is generally unsafe.
 	 */
 	stop_critical_timings();
+	rcu_idle_enter();
 	drv->states[index].enter_s2idle(dev, drv, index);
 	if (WARN_ON_ONCE(!irqs_disabled()))
 		local_irq_disable();
@@ -160,7 +161,8 @@ static void enter_s2idle_proper(struct cpuidle_driver *drv,
 	 * first CPU executing it calls functions containing RCU read-side
 	 * critical sections, so tell RCU about that.
 	 */
-	RCU_NONIDLE(tick_unfreeze());
+	rcu_idle_exit();
+	tick_unfreeze();
 	start_critical_timings();
 
 	time_end = ns_to_ktime(local_clock());
@@ -229,16 +231,18 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
 	/* Take note of the planned idle state. */
 	sched_idle_set_state(target_state);
 
-	trace_cpu_idle_rcuidle(index, dev->cpu);
+	trace_cpu_idle(index, dev->cpu);
 	time_start = ns_to_ktime(local_clock());
 
 	stop_critical_timings();
+	rcu_idle_enter();
 	entered_state = target_state->enter(dev, drv, index);
+	rcu_idle_exit();
 	start_critical_timings();
 
 	sched_clock_idle_wakeup_event();
 	time_end = ns_to_ktime(local_clock());
-	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, dev->cpu);
+	trace_cpu_idle(PWR_EVENT_EXIT, dev->cpu);
 
 	/* The cpu is no longer idle or about to enter idle. */
 	sched_idle_set_state(NULL);
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index 6bf34986f45ce..ea3a0989dc4cf 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -54,17 +54,18 @@ __setup("hlt", cpu_idle_nopoll_setup);
 
 static noinline int __cpuidle cpu_idle_poll(void)
 {
+	trace_cpu_idle(0, smp_processor_id());
+	stop_critical_timings();
 	rcu_idle_enter();
-	trace_cpu_idle_rcuidle(0, smp_processor_id());
 	local_irq_enable();
-	stop_critical_timings();
 
 	while (!tif_need_resched() &&
-		(cpu_idle_force_poll || tick_check_broadcast_expired()))
+	       (cpu_idle_force_poll || tick_check_broadcast_expired()))
 		cpu_relax();
-	start_critical_timings();
-	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
+
 	rcu_idle_exit();
+	start_critical_timings();
+	trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
 
 	return 1;
 }
@@ -91,7 +92,9 @@ void __cpuidle default_idle_call(void)
 		local_irq_enable();
 	} else {
 		stop_critical_timings();
+		rcu_idle_enter();
 		arch_cpu_idle();
+		rcu_idle_exit();
 		start_critical_timings();
 	}
 }
@@ -158,7 +161,6 @@ static void cpuidle_idle_call(void)
 
 	if (cpuidle_not_available(drv, dev)) {
 		tick_nohz_idle_stop_tick();
-		rcu_idle_enter();
 
 		default_idle_call();
 		goto exit_idle;
@@ -178,21 +180,17 @@ static void cpuidle_idle_call(void)
 		u64 max_latency_ns;
 
 		if (idle_should_enter_s2idle()) {
-			rcu_idle_enter();
 
 			entered_state = call_cpuidle_s2idle(drv, dev);
 			if (entered_state > 0)
 				goto exit_idle;
 
-			rcu_idle_exit();
-
 			max_latency_ns = U64_MAX;
 		} else {
 			max_latency_ns = dev->forced_idle_latency_limit_ns;
 		}
 
 		tick_nohz_idle_stop_tick();
-		rcu_idle_enter();
 
 		next_state = cpuidle_find_deepest_state(drv, dev, max_latency_ns);
 		call_cpuidle(drv, dev, next_state);
@@ -209,8 +207,6 @@ static void cpuidle_idle_call(void)
 		else
 			tick_nohz_idle_retain_tick();
 
-		rcu_idle_enter();
-
 		entered_state = call_cpuidle(drv, dev, next_state);
 		/*
 		 * Give the governor an opportunity to reflect on the outcome
@@ -226,8 +222,6 @@ static void cpuidle_idle_call(void)
 	 */
 	if (WARN_ON_ONCE(irqs_disabled()))
 		local_irq_enable();
-
-	rcu_idle_exit();
 }
 
 /*
-- 
GitLab


From bf9282dc26e7fe2a0736edc568762f0f05d12416 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 12 Aug 2020 12:22:17 +0200
Subject: [PATCH 0638/1341] cpuidle: Make CPUIDLE_FLAG_TLB_FLUSHED generic

This allows moving the leave_mm() call into generic code before
rcu_idle_enter(). Gets rid of more trace_*_rcuidle() users.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200821085348.369441600@infradead.org
---
 arch/x86/include/asm/mmu.h  |  1 +
 arch/x86/mm/tlb.c           | 13 ++-----------
 drivers/cpuidle/cpuidle.c   |  4 ++++
 drivers/idle/intel_idle.c   | 16 ----------------
 include/linux/cpuidle.h     | 13 +++++++------
 include/linux/mmu_context.h |  5 +++++
 6 files changed, 19 insertions(+), 33 deletions(-)

diff --git a/arch/x86/include/asm/mmu.h b/arch/x86/include/asm/mmu.h
index 0a301ad0b02f0..9257667d13c5e 100644
--- a/arch/x86/include/asm/mmu.h
+++ b/arch/x86/include/asm/mmu.h
@@ -59,5 +59,6 @@ typedef struct {
 	}
 
 void leave_mm(int cpu);
+#define leave_mm leave_mm
 
 #endif /* _ASM_X86_MMU_H */
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 1a3569b43aa5b..0951b47e64c10 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -555,21 +555,12 @@ void switch_mm_irqs_off(struct mm_struct *prev, struct mm_struct *next,
 		this_cpu_write(cpu_tlbstate.ctxs[new_asid].tlb_gen, next_tlb_gen);
 		load_new_mm_cr3(next->pgd, new_asid, true);
 
-		/*
-		 * NB: This gets called via leave_mm() in the idle path
-		 * where RCU functions differently.  Tracing normally
-		 * uses RCU, so we need to use the _rcuidle variant.
-		 *
-		 * (There is no good reason for this.  The idle code should
-		 *  be rearranged to call this before rcu_idle_enter().)
-		 */
-		trace_tlb_flush_rcuidle(TLB_FLUSH_ON_TASK_SWITCH, TLB_FLUSH_ALL);
+		trace_tlb_flush(TLB_FLUSH_ON_TASK_SWITCH, TLB_FLUSH_ALL);
 	} else {
 		/* The new ASID is already up to date. */
 		load_new_mm_cr3(next->pgd, new_asid, false);
 
-		/* See above wrt _rcuidle. */
-		trace_tlb_flush_rcuidle(TLB_FLUSH_ON_TASK_SWITCH, 0);
+		trace_tlb_flush(TLB_FLUSH_ON_TASK_SWITCH, 0);
 	}
 
 	/* Make sure we write CR3 before loaded_mm. */
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 9bcda4153d3bb..04becd70cc41f 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -22,6 +22,7 @@
 #include <linux/module.h>
 #include <linux/suspend.h>
 #include <linux/tick.h>
+#include <linux/mmu_context.h>
 #include <trace/events/power.h>
 
 #include "cpuidle.h"
@@ -228,6 +229,9 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
 		broadcast = false;
 	}
 
+	if (target_state->flags & CPUIDLE_FLAG_TLB_FLUSHED)
+		leave_mm(dev->cpu);
+
 	/* Take note of the planned idle state. */
 	sched_idle_set_state(target_state);
 
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 8e0fb1a5bdbd1..9a810e4a79460 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -89,14 +89,6 @@ static unsigned int mwait_substates __initdata;
  */
 #define CPUIDLE_FLAG_ALWAYS_ENABLE	BIT(15)
 
-/*
- * Set this flag for states where the HW flushes the TLB for us
- * and so we don't need cross-calls to keep it consistent.
- * If this flag is set, SW flushes the TLB, so even if the
- * HW doesn't do the flushing, this flag is safe to use.
- */
-#define CPUIDLE_FLAG_TLB_FLUSHED	BIT(16)
-
 /*
  * MWAIT takes an 8-bit "hint" in EAX "suggesting"
  * the C-state (top nibble) and sub-state (bottom nibble)
@@ -131,14 +123,6 @@ static __cpuidle int intel_idle(struct cpuidle_device *dev,
 	unsigned long eax = flg2MWAIT(state->flags);
 	unsigned long ecx = 1; /* break on interrupt flag */
 	bool tick;
-	int cpu = smp_processor_id();
-
-	/*
-	 * leave_mm() to avoid costly and often unnecessary wakeups
-	 * for flushing the user TLB's associated with the active mm.
-	 */
-	if (state->flags & CPUIDLE_FLAG_TLB_FLUSHED)
-		leave_mm(cpu);
 
 	if (!static_cpu_has(X86_FEATURE_ARAT)) {
 		/*
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index b65909ae4e201..75895e6363b89 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -75,12 +75,13 @@ struct cpuidle_state {
 };
 
 /* Idle State Flags */
-#define CPUIDLE_FLAG_NONE       (0x00)
-#define CPUIDLE_FLAG_POLLING	BIT(0) /* polling state */
-#define CPUIDLE_FLAG_COUPLED	BIT(1) /* state applies to multiple cpus */
-#define CPUIDLE_FLAG_TIMER_STOP BIT(2) /* timer is stopped on this state */
-#define CPUIDLE_FLAG_UNUSABLE	BIT(3) /* avoid using this state */
-#define CPUIDLE_FLAG_OFF	BIT(4) /* disable this state by default */
+#define CPUIDLE_FLAG_NONE       	(0x00)
+#define CPUIDLE_FLAG_POLLING		BIT(0) /* polling state */
+#define CPUIDLE_FLAG_COUPLED		BIT(1) /* state applies to multiple cpus */
+#define CPUIDLE_FLAG_TIMER_STOP 	BIT(2) /* timer is stopped on this state */
+#define CPUIDLE_FLAG_UNUSABLE		BIT(3) /* avoid using this state */
+#define CPUIDLE_FLAG_OFF		BIT(4) /* disable this state by default */
+#define CPUIDLE_FLAG_TLB_FLUSHED	BIT(5) /* idle-state flushes TLBs */
 
 struct cpuidle_device_kobj;
 struct cpuidle_state_kobj;
diff --git a/include/linux/mmu_context.h b/include/linux/mmu_context.h
index c51a84132d7c0..03dee12d2b61c 100644
--- a/include/linux/mmu_context.h
+++ b/include/linux/mmu_context.h
@@ -3,10 +3,15 @@
 #define _LINUX_MMU_CONTEXT_H
 
 #include <asm/mmu_context.h>
+#include <asm/mmu.h>
 
 /* Architectures that care about IRQ state in switch_mm can override this. */
 #ifndef switch_mm_irqs_off
 # define switch_mm_irqs_off switch_mm
 #endif
 
+#ifndef leave_mm
+static inline void leave_mm(int cpu) { }
+#endif
+
 #endif
-- 
GitLab


From 9864f5b5943ab0f1f835f21dc3f9f068d06f5b52 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 12 Aug 2020 12:27:10 +0200
Subject: [PATCH 0639/1341] cpuidle: Move trace_cpu_idle() into generic code

Remove trace_cpu_idle() from the arch_cpu_idle() implementations and
put it in the generic code, right before disabling RCU. Gets rid of
more trace_*_rcuidle() users.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200821085348.428433395@infradead.org
---
 arch/arm/mach-omap2/pm34xx.c | 4 ----
 arch/arm64/kernel/process.c  | 2 --
 arch/s390/kernel/idle.c      | 3 +--
 arch/x86/kernel/process.c    | 4 ----
 kernel/sched/idle.c          | 3 +++
 5 files changed, 4 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-omap2/pm34xx.c b/arch/arm/mach-omap2/pm34xx.c
index 6df395fff971b..f5dfddf492e21 100644
--- a/arch/arm/mach-omap2/pm34xx.c
+++ b/arch/arm/mach-omap2/pm34xx.c
@@ -298,11 +298,7 @@ static void omap3_pm_idle(void)
 	if (omap_irq_pending())
 		return;
 
-	trace_cpu_idle_rcuidle(1, smp_processor_id());
-
 	omap_sram_idle();
-
-	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
 }
 
 #ifdef CONFIG_SUSPEND
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index b63ce4c54cfe9..f1804496b9350 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -123,10 +123,8 @@ void arch_cpu_idle(void)
 	 * This should do all the clock switching and wait for interrupt
 	 * tricks
 	 */
-	trace_cpu_idle_rcuidle(1, smp_processor_id());
 	cpu_do_idle();
 	local_irq_enable();
-	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
diff --git a/arch/s390/kernel/idle.c b/arch/s390/kernel/idle.c
index 88bb42ca50084..c73f50649e7e4 100644
--- a/arch/s390/kernel/idle.c
+++ b/arch/s390/kernel/idle.c
@@ -33,14 +33,13 @@ void enabled_wait(void)
 		PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
 	clear_cpu_flag(CIF_NOHZ_DELAY);
 
-	trace_cpu_idle_rcuidle(1, smp_processor_id());
 	local_irq_save(flags);
 	/* Call the assembler magic in entry.S */
 	psw_idle(idle, psw_mask);
 	local_irq_restore(flags);
-	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
 
 	/* Account time spent with enabled wait psw loaded as idle time. */
+	/* XXX seqcount has tracepoints that require RCU */
 	write_seqcount_begin(&idle->seqcount);
 	idle_time = idle->clock_idle_exit - idle->clock_idle_enter;
 	idle->clock_idle_enter = idle->clock_idle_exit = 0ULL;
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 994d8393f2f7b..13ce616cc7afb 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -684,9 +684,7 @@ void arch_cpu_idle(void)
  */
 void __cpuidle default_idle(void)
 {
-	trace_cpu_idle_rcuidle(1, smp_processor_id());
 	safe_halt();
-	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
 }
 #if defined(CONFIG_APM_MODULE) || defined(CONFIG_HALTPOLL_CPUIDLE_MODULE)
 EXPORT_SYMBOL(default_idle);
@@ -792,7 +790,6 @@ static int prefer_mwait_c1_over_halt(const struct cpuinfo_x86 *c)
 static __cpuidle void mwait_idle(void)
 {
 	if (!current_set_polling_and_test()) {
-		trace_cpu_idle_rcuidle(1, smp_processor_id());
 		if (this_cpu_has(X86_BUG_CLFLUSH_MONITOR)) {
 			mb(); /* quirk */
 			clflush((void *)&current_thread_info()->flags);
@@ -804,7 +801,6 @@ static __cpuidle void mwait_idle(void)
 			__sti_mwait(0, 0);
 		else
 			local_irq_enable();
-		trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
 	} else {
 		local_irq_enable();
 	}
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index ea3a0989dc4cf..f324dc36fc43d 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -91,11 +91,14 @@ void __cpuidle default_idle_call(void)
 	if (current_clr_polling_and_test()) {
 		local_irq_enable();
 	} else {
+
+		trace_cpu_idle(1, smp_processor_id());
 		stop_critical_timings();
 		rcu_idle_enter();
 		arch_cpu_idle();
 		rcu_idle_exit();
 		start_critical_timings();
+		trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
 	}
 }
 
-- 
GitLab


From 7da93f379330f2be1122ca7f54ab1eb44ef9aa59 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 12 Aug 2020 19:28:07 +0200
Subject: [PATCH 0640/1341] x86/entry: Remove unused THUNKs

Unused remnants

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200821085348.487040689@infradead.org
---
 arch/x86/entry/thunk_32.S | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/x86/entry/thunk_32.S b/arch/x86/entry/thunk_32.S
index 3a07ce3ec70ba..f1f96d4d8cd60 100644
--- a/arch/x86/entry/thunk_32.S
+++ b/arch/x86/entry/thunk_32.S
@@ -29,11 +29,6 @@ SYM_CODE_START_NOALIGN(\name)
 SYM_CODE_END(\name)
 	.endm
 
-#ifdef CONFIG_TRACE_IRQFLAGS
-	THUNK trace_hardirqs_on_thunk,trace_hardirqs_on_caller,1
-	THUNK trace_hardirqs_off_thunk,trace_hardirqs_off_caller,1
-#endif
-
 #ifdef CONFIG_PREEMPTION
 	THUNK preempt_schedule_thunk, preempt_schedule
 	THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
-- 
GitLab


From 00b0ed2d4997af6d0a93edef820386951fd66d94 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 12 Aug 2020 19:28:06 +0200
Subject: [PATCH 0641/1341] locking/lockdep: Cleanup

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200821085348.546087214@infradead.org
---
 include/linux/irqflags.h | 54 ++++++++++++++++++++++------------------
 1 file changed, 30 insertions(+), 24 deletions(-)

diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h
index d7e50a215ea98..00d553d779113 100644
--- a/include/linux/irqflags.h
+++ b/include/linux/irqflags.h
@@ -49,10 +49,11 @@ struct irqtrace_events {
 DECLARE_PER_CPU(int, hardirqs_enabled);
 DECLARE_PER_CPU(int, hardirq_context);
 
-  extern void trace_hardirqs_on_prepare(void);
-  extern void trace_hardirqs_off_finish(void);
-  extern void trace_hardirqs_on(void);
-  extern void trace_hardirqs_off(void);
+extern void trace_hardirqs_on_prepare(void);
+extern void trace_hardirqs_off_finish(void);
+extern void trace_hardirqs_on(void);
+extern void trace_hardirqs_off(void);
+
 # define lockdep_hardirq_context()	(raw_cpu_read(hardirq_context))
 # define lockdep_softirq_context(p)	((p)->softirq_context)
 # define lockdep_hardirqs_enabled()	(this_cpu_read(hardirqs_enabled))
@@ -120,17 +121,17 @@ do {						\
 #else
 # define trace_hardirqs_on_prepare()		do { } while (0)
 # define trace_hardirqs_off_finish()		do { } while (0)
-# define trace_hardirqs_on()		do { } while (0)
-# define trace_hardirqs_off()		do { } while (0)
-# define lockdep_hardirq_context()	0
-# define lockdep_softirq_context(p)	0
-# define lockdep_hardirqs_enabled()	0
-# define lockdep_softirqs_enabled(p)	0
-# define lockdep_hardirq_enter()	do { } while (0)
-# define lockdep_hardirq_threaded()	do { } while (0)
-# define lockdep_hardirq_exit()		do { } while (0)
-# define lockdep_softirq_enter()	do { } while (0)
-# define lockdep_softirq_exit()		do { } while (0)
+# define trace_hardirqs_on()			do { } while (0)
+# define trace_hardirqs_off()			do { } while (0)
+# define lockdep_hardirq_context()		0
+# define lockdep_softirq_context(p)		0
+# define lockdep_hardirqs_enabled()		0
+# define lockdep_softirqs_enabled(p)		0
+# define lockdep_hardirq_enter()		do { } while (0)
+# define lockdep_hardirq_threaded()		do { } while (0)
+# define lockdep_hardirq_exit()			do { } while (0)
+# define lockdep_softirq_enter()		do { } while (0)
+# define lockdep_softirq_exit()			do { } while (0)
 # define lockdep_hrtimer_enter(__hrtimer)	false
 # define lockdep_hrtimer_exit(__context)	do { } while (0)
 # define lockdep_posixtimer_enter()		do { } while (0)
@@ -181,17 +182,25 @@ do {						\
  * if !TRACE_IRQFLAGS.
  */
 #ifdef CONFIG_TRACE_IRQFLAGS
-#define local_irq_enable() \
-	do { trace_hardirqs_on(); raw_local_irq_enable(); } while (0)
-#define local_irq_disable() \
-	do { raw_local_irq_disable(); trace_hardirqs_off(); } while (0)
+
+#define local_irq_enable()				\
+	do {						\
+		trace_hardirqs_on();			\
+		raw_local_irq_enable();			\
+	} while (0)
+
+#define local_irq_disable()				\
+	do {						\
+		raw_local_irq_disable();		\
+		trace_hardirqs_off();			\
+	} while (0)
+
 #define local_irq_save(flags)				\
 	do {						\
 		raw_local_irq_save(flags);		\
 		trace_hardirqs_off();			\
 	} while (0)
 
-
 #define local_irq_restore(flags)			\
 	do {						\
 		if (raw_irqs_disabled_flags(flags)) {	\
@@ -214,10 +223,7 @@ do {						\
 
 #define local_irq_enable()	do { raw_local_irq_enable(); } while (0)
 #define local_irq_disable()	do { raw_local_irq_disable(); } while (0)
-#define local_irq_save(flags)					\
-	do {							\
-		raw_local_irq_save(flags);			\
-	} while (0)
+#define local_irq_save(flags)	do { raw_local_irq_save(flags); } while (0)
 #define local_irq_restore(flags) do { raw_local_irq_restore(flags); } while (0)
 #define safe_halt()		do { raw_safe_halt(); } while (0)
 
-- 
GitLab


From 36206b588bc815e5f64e8da72d7ab79e00b76281 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 20 Aug 2020 09:27:52 +0200
Subject: [PATCH 0642/1341] nds32: Implement arch_irqs_disabled()

Cc: Nick Hu <nickhu@andestech.com>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Vincent Chen <deanbo422@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200821085348.604899379@infradead.org
---
 arch/nds32/include/asm/irqflags.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/nds32/include/asm/irqflags.h b/arch/nds32/include/asm/irqflags.h
index fb45ec46bb1b2..51ef800bb3018 100644
--- a/arch/nds32/include/asm/irqflags.h
+++ b/arch/nds32/include/asm/irqflags.h
@@ -34,3 +34,8 @@ static inline int arch_irqs_disabled_flags(unsigned long flags)
 {
 	return !flags;
 }
+
+static inline int arch_irqs_disabled(void)
+{
+	return arch_irqs_disabled_flags(arch_local_save_flags());
+}
-- 
GitLab


From 021c109330ebc1f54b546c63a078ea3c31356ecb Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 21 Aug 2020 10:40:49 +0200
Subject: [PATCH 0643/1341] arm64: Implement arch_irqs_disabled()

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lkml.kernel.org/r/20200821085348.664425120@infradead.org
---
 arch/arm64/include/asm/irqflags.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm64/include/asm/irqflags.h b/arch/arm64/include/asm/irqflags.h
index aa4b6521ef144..ff328e5bbb757 100644
--- a/arch/arm64/include/asm/irqflags.h
+++ b/arch/arm64/include/asm/irqflags.h
@@ -95,6 +95,11 @@ static inline int arch_irqs_disabled_flags(unsigned long flags)
 	return res;
 }
 
+static inline int arch_irqs_disabled(void)
+{
+	return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
 static inline unsigned long arch_local_irq_save(void)
 {
 	unsigned long flags;
-- 
GitLab


From 99dc56feb7932020502d40107a712fa302b32082 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Sat, 22 Aug 2020 18:04:15 +0200
Subject: [PATCH 0644/1341] mips: Implement arch_irqs_disabled()

Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200826101653.GE1362448@hirez.programming.kicks-ass.net
---
 arch/mips/include/asm/irqflags.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/mips/include/asm/irqflags.h b/arch/mips/include/asm/irqflags.h
index 47a8ffc0b413e..f5b8300f45735 100644
--- a/arch/mips/include/asm/irqflags.h
+++ b/arch/mips/include/asm/irqflags.h
@@ -137,6 +137,11 @@ static inline int arch_irqs_disabled_flags(unsigned long flags)
 	return !(flags & 1);
 }
 
+static inline int arch_irqs_disabled(void)
+{
+	return arch_irqs_disabled_flags(arch_local_save_flags());
+}
+
 #endif /* #ifndef __ASSEMBLY__ */
 
 /*
-- 
GitLab


From 044d0d6de9f50192f9697583504a382347ee95ca Mon Sep 17 00:00:00 2001
From: Nicholas Piggin <npiggin@gmail.com>
Date: Thu, 23 Jul 2020 20:56:14 +1000
Subject: [PATCH 0645/1341] lockdep: Only trace IRQ edges

Problem:

  raw_local_irq_save(); // software state on
  local_irq_save(); // software state off
  ...
  local_irq_restore(); // software state still off, because we don't enable IRQs
  raw_local_irq_restore(); // software state still off, *whoopsie*

existing instances:

 - lock_acquire()
     raw_local_irq_save()
     __lock_acquire()
       arch_spin_lock(&graph_lock)
         pv_wait() := kvm_wait() (same or worse for Xen/HyperV)
           local_irq_save()

 - trace_clock_global()
     raw_local_irq_save()
     arch_spin_lock()
       pv_wait() := kvm_wait()
	 local_irq_save()

 - apic_retrigger_irq()
     raw_local_irq_save()
     apic->send_IPI() := default_send_IPI_single_phys()
       local_irq_save()

Possible solutions:

 A) make it work by enabling the tracing inside raw_*()
 B) make it work by keeping tracing disabled inside raw_*()
 C) call it broken and clean it up now

Now, given that the only reason to use the raw_* variant is because you don't
want tracing. Therefore A) seems like a weird option (although it can be done).
C) is tempting, but OTOH it ends up converting a _lot_ of code to raw just
because there is one raw user, this strips the validation/tracing off for all
the other users.

So we pick B) and declare any code that ends up doing:

	raw_local_irq_save()
	local_irq_save()
	lockdep_assert_irqs_disabled();

broken. AFAICT this problem has existed forever, the only reason it came
up is because commit: 859d069ee1dd ("lockdep: Prepare for NMI IRQ
state tracking") changed IRQ tracing vs lockdep recursion and the
first instance is fairly common, the other cases hardly ever happen.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[rewrote changelog]
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200723105615.1268126-1-npiggin@gmail.com
---
 arch/powerpc/include/asm/hw_irq.h | 11 ++++-------
 include/linux/irqflags.h          | 15 +++++++--------
 2 files changed, 11 insertions(+), 15 deletions(-)

diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h
index 3a0db7b0b46ef..35060be090732 100644
--- a/arch/powerpc/include/asm/hw_irq.h
+++ b/arch/powerpc/include/asm/hw_irq.h
@@ -200,17 +200,14 @@ static inline bool arch_irqs_disabled(void)
 #define powerpc_local_irq_pmu_save(flags)			\
 	 do {							\
 		raw_local_irq_pmu_save(flags);			\
-		trace_hardirqs_off();				\
+		if (!raw_irqs_disabled_flags(flags))		\
+			trace_hardirqs_off();			\
 	} while(0)
 #define powerpc_local_irq_pmu_restore(flags)			\
 	do {							\
-		if (raw_irqs_disabled_flags(flags)) {		\
-			raw_local_irq_pmu_restore(flags);	\
-			trace_hardirqs_off();			\
-		} else {					\
+		if (!raw_irqs_disabled_flags(flags))		\
 			trace_hardirqs_on();			\
-			raw_local_irq_pmu_restore(flags);	\
-		}						\
+		raw_local_irq_pmu_restore(flags);		\
 	} while(0)
 #else
 #define powerpc_local_irq_pmu_save(flags)			\
diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h
index 00d553d779113..3ed4e8771b64e 100644
--- a/include/linux/irqflags.h
+++ b/include/linux/irqflags.h
@@ -191,25 +191,24 @@ do {						\
 
 #define local_irq_disable()				\
 	do {						\
+		bool was_disabled = raw_irqs_disabled();\
 		raw_local_irq_disable();		\
-		trace_hardirqs_off();			\
+		if (!was_disabled)			\
+			trace_hardirqs_off();		\
 	} while (0)
 
 #define local_irq_save(flags)				\
 	do {						\
 		raw_local_irq_save(flags);		\
-		trace_hardirqs_off();			\
+		if (!raw_irqs_disabled_flags(flags))	\
+			trace_hardirqs_off();		\
 	} while (0)
 
 #define local_irq_restore(flags)			\
 	do {						\
-		if (raw_irqs_disabled_flags(flags)) {	\
-			raw_local_irq_restore(flags);	\
-			trace_hardirqs_off();		\
-		} else {				\
+		if (!raw_irqs_disabled_flags(flags))	\
 			trace_hardirqs_on();		\
-			raw_local_irq_restore(flags);	\
-		}					\
+		raw_local_irq_restore(flags);		\
 	} while (0)
 
 #define safe_halt()				\
-- 
GitLab


From eb1f00237aca2e368b93db79303f8433d1976d10 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Fri, 7 Aug 2020 20:53:16 +0200
Subject: [PATCH 0646/1341] lockdep,trace: Expose tracepoints

The lockdep tracepoints are under the lockdep recursion counter, this
has a bunch of nasty side effects:

 - TRACE_IRQFLAGS doesn't work across the entire tracepoint

 - RCU-lockdep doesn't see the tracepoints either, hiding numerous
   "suspicious RCU usage" warnings.

Pull the trace_lock_*() tracepoints completely out from under the
lockdep recursion handling and completely rely on the trace level
recusion handling -- also, tracing *SHOULD* not be taking locks in any
case.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200821085348.782688941@infradead.org
---
 kernel/locking/lockdep.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index c872e95e6e4d1..54b74fabf40c7 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -4977,6 +4977,8 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
 {
 	unsigned long flags;
 
+	trace_lock_acquire(lock, subclass, trylock, read, check, nest_lock, ip);
+
 	if (unlikely(current->lockdep_recursion)) {
 		/* XXX allow trylock from NMI ?!? */
 		if (lockdep_nmi() && !trylock) {
@@ -5001,7 +5003,6 @@ void lock_acquire(struct lockdep_map *lock, unsigned int subclass,
 	check_flags(flags);
 
 	current->lockdep_recursion++;
-	trace_lock_acquire(lock, subclass, trylock, read, check, nest_lock, ip);
 	__lock_acquire(lock, subclass, trylock, read, check,
 		       irqs_disabled_flags(flags), nest_lock, ip, 0, 0);
 	lockdep_recursion_finish();
@@ -5013,13 +5014,15 @@ void lock_release(struct lockdep_map *lock, unsigned long ip)
 {
 	unsigned long flags;
 
+	trace_lock_release(lock, ip);
+
 	if (unlikely(current->lockdep_recursion))
 		return;
 
 	raw_local_irq_save(flags);
 	check_flags(flags);
+
 	current->lockdep_recursion++;
-	trace_lock_release(lock, ip);
 	if (__lock_release(lock, ip))
 		check_chain_key(current);
 	lockdep_recursion_finish();
@@ -5205,8 +5208,6 @@ __lock_acquired(struct lockdep_map *lock, unsigned long ip)
 		hlock->holdtime_stamp = now;
 	}
 
-	trace_lock_acquired(lock, ip);
-
 	stats = get_lock_stats(hlock_class(hlock));
 	if (waittime) {
 		if (hlock->read)
@@ -5225,6 +5226,8 @@ void lock_contended(struct lockdep_map *lock, unsigned long ip)
 {
 	unsigned long flags;
 
+	trace_lock_acquired(lock, ip);
+
 	if (unlikely(!lock_stat || !debug_locks))
 		return;
 
@@ -5234,7 +5237,6 @@ void lock_contended(struct lockdep_map *lock, unsigned long ip)
 	raw_local_irq_save(flags);
 	check_flags(flags);
 	current->lockdep_recursion++;
-	trace_lock_contended(lock, ip);
 	__lock_contended(lock, ip);
 	lockdep_recursion_finish();
 	raw_local_irq_restore(flags);
@@ -5245,6 +5247,8 @@ void lock_acquired(struct lockdep_map *lock, unsigned long ip)
 {
 	unsigned long flags;
 
+	trace_lock_contended(lock, ip);
+
 	if (unlikely(!lock_stat || !debug_locks))
 		return;
 
-- 
GitLab


From 9f4ce5d72b8e7a1f750598407c99f9e39dfb12fc Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Thu, 23 Jul 2020 17:12:53 +0800
Subject: [PATCH 0647/1341] vdpa: ifcvf: return err when fail to request config
 irq

We ignore the err of requesting config interrupt, fix this.

Fixes: e7991f376a4d ("ifcvf: implement config interrupt in IFCVF")
Cc: Zhu Lingshan <lingshan.zhu@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200723091254.20617-1-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Zhu Lingshan <lingshan.zhu@intel.com>
Fixes: e7991f376a4d ("ifcvf: implement config interrupt in IFCVF")
Cc: Zhu Lingshan <a class="moz-txt-link-rfc2396E" href="mailto:lingshan.zhu@intel.com">&lt;lingshan.zhu@intel.com&gt;</a>
Signed-off-by: Jason Wang <a class="moz-txt-link-rfc2396E" href="mailto:jasowang@redhat.com">&lt;jasowang@redhat.com&gt;</a>
Tested-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---
 drivers/vdpa/ifcvf/ifcvf_main.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 076d7ac5e723f..7d404f691b0e6 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -78,6 +78,10 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
 	ret = devm_request_irq(&pdev->dev, irq,
 			       ifcvf_config_changed, 0,
 			       vf->config_msix_name, vf);
+	if (ret) {
+		IFCVF_ERR(pdev, "Failed to request config irq\n");
+		return ret;
+	}
 
 	for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
 		snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n",
-- 
GitLab


From 2b9f28d5e8efad34f472542315911c5ee9a65b6c Mon Sep 17 00:00:00 2001
From: Jason Wang <jasowang@redhat.com>
Date: Thu, 23 Jul 2020 17:12:54 +0800
Subject: [PATCH 0648/1341] vdpa: ifcvf: free config irq in ifcvf_free_irq()

We don't free config irq in ifcvf_free_irq() which will trigger a
BUG() in pci core since we try to free the vectors that has an
action. Fixing this by recording the config irq in ifcvf_hw structure
and free it in ifcvf_free_irq().

Fixes: e7991f376a4d ("ifcvf: implement config interrupt in IFCVF")
Cc: Zhu Lingshan <lingshan.zhu@intel.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20200723091254.20617-2-jasowang@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Zhu Lingshan <lingshan.zhu@intel.com>
Fixes: e7991f376a4d ("ifcvf: implement config interrupt in IFCVF")
Cc: Zhu Lingshan <a class="moz-txt-link-rfc2396E" href="mailto:lingshan.zhu@intel.com">&lt;lingshan.zhu@intel.com&gt;</a>
Signed-off-by: Jason Wang <a class="moz-txt-link-rfc2396E" href="mailto:jasowang@redhat.com">&lt;jasowang@redhat.com&gt;</a>
---
 drivers/vdpa/ifcvf/ifcvf_base.h | 2 +-
 drivers/vdpa/ifcvf/ifcvf_main.c | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
index 08f267a2aafec..64696d63fe077 100644
--- a/drivers/vdpa/ifcvf/ifcvf_base.h
+++ b/drivers/vdpa/ifcvf/ifcvf_base.h
@@ -84,7 +84,7 @@ struct ifcvf_hw {
 	void __iomem * const *base;
 	char config_msix_name[256];
 	struct vdpa_callback config_cb;
-
+	unsigned int config_irq;
 };
 
 struct ifcvf_adapter {
diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
index 7d404f691b0e6..8b4028556cb66 100644
--- a/drivers/vdpa/ifcvf/ifcvf_main.c
+++ b/drivers/vdpa/ifcvf/ifcvf_main.c
@@ -55,6 +55,7 @@ static void ifcvf_free_irq(struct ifcvf_adapter *adapter, int queues)
 		vf->vring[i].irq = -EINVAL;
 	}
 
+	devm_free_irq(&pdev->dev, vf->config_irq, vf);
 	ifcvf_free_irq_vectors(pdev);
 }
 
@@ -74,8 +75,8 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
 	snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n",
 		 pci_name(pdev));
 	vector = 0;
-	irq = pci_irq_vector(pdev, vector);
-	ret = devm_request_irq(&pdev->dev, irq,
+	vf->config_irq = pci_irq_vector(pdev, vector);
+	ret = devm_request_irq(&pdev->dev, vf->config_irq,
 			       ifcvf_config_changed, 0,
 			       vf->config_msix_name, vf);
 	if (ret) {
-- 
GitLab


From eb07d8f5ff32a0151967a56479fc3bd1003c303f Mon Sep 17 00:00:00 2001
From: Stefano Garzarella <sgarzare@redhat.com>
Date: Tue, 25 Aug 2020 15:05:43 +0200
Subject: [PATCH 0649/1341] vhost-iotlb: fix vhost_iotlb_itree_next()
 documentation

This patch contains trivial changes for the vhost_iotlb_itree_next()
documentation, fixing the function name and the description of
first argument (@map).

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20200825130543.43308-1-sgarzare@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 drivers/vhost/iotlb.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/vhost/iotlb.c b/drivers/vhost/iotlb.c
index 1f0ca6e44410a..34aec4ba331ec 100644
--- a/drivers/vhost/iotlb.c
+++ b/drivers/vhost/iotlb.c
@@ -159,8 +159,8 @@ vhost_iotlb_itree_first(struct vhost_iotlb *iotlb, u64 start, u64 last)
 EXPORT_SYMBOL_GPL(vhost_iotlb_itree_first);
 
 /**
- * vhost_iotlb_itree_first - return the next overlapped range
- * @iotlb: the IOTLB
+ * vhost_iotlb_itree_next - return the next overlapped range
+ * @map: the starting map node
  * @start: start of IOVA range
  * @end: end of IOVA range
  */
-- 
GitLab


From cbb523594eb718944b726ba52bb43a1d66188a17 Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <natechancellor@gmail.com>
Date: Fri, 21 Aug 2020 15:50:19 -0700
Subject: [PATCH 0650/1341] vdpa/mlx5: Avoid warnings about shifts on 32-bit
 platforms

Clang warns several times when building for 32-bit ARM along the lines
of:

drivers/vdpa/mlx5/net/mlx5_vnet.c:1462:31: warning: shift count >= width
of type [-Wshift-count-overflow]
                ndev->mvdev.mlx_features |= BIT(VIRTIO_F_VERSION_1);
                                            ^~~~~~~~~~~~~~~~~~~~~~~

This is related to the BIT macro, which uses an unsigned long literal,
which is 32-bit on ARM so having a shift equal to or larger than 32 will
cause this warning, such as the above, where VIRTIO_F_VERSION_1 is 32.
To avoid this, use BIT_ULL, which will be an unsigned long long. This
matches the size of the features field throughout this driver, which is
u64 so there should be no functional change.

Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
Link: https://github.com/ClangBuiltLinux/linux/issues/1140
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://lore.kernel.org/r/20200821225018.940798-1-natechancellor@gmail.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested
Acked-by: Eli Cohen <elic@nvidia.com>
---
 drivers/vdpa/mlx5/net/mlx5_vnet.c | 50 +++++++++++++++----------------
 1 file changed, 25 insertions(+), 25 deletions(-)

diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
index 9df69d5efe8c7..70676a6d16914 100644
--- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
+++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
@@ -16,19 +16,19 @@
 #define to_mvdev(__vdev) container_of((__vdev), struct mlx5_vdpa_dev, vdev)
 
 #define VALID_FEATURES_MASK                                                                        \
-	(BIT(VIRTIO_NET_F_CSUM) | BIT(VIRTIO_NET_F_GUEST_CSUM) |                                   \
-	 BIT(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | BIT(VIRTIO_NET_F_MTU) | BIT(VIRTIO_NET_F_MAC) |   \
-	 BIT(VIRTIO_NET_F_GUEST_TSO4) | BIT(VIRTIO_NET_F_GUEST_TSO6) |                             \
-	 BIT(VIRTIO_NET_F_GUEST_ECN) | BIT(VIRTIO_NET_F_GUEST_UFO) | BIT(VIRTIO_NET_F_HOST_TSO4) | \
-	 BIT(VIRTIO_NET_F_HOST_TSO6) | BIT(VIRTIO_NET_F_HOST_ECN) | BIT(VIRTIO_NET_F_HOST_UFO) |   \
-	 BIT(VIRTIO_NET_F_MRG_RXBUF) | BIT(VIRTIO_NET_F_STATUS) | BIT(VIRTIO_NET_F_CTRL_VQ) |      \
-	 BIT(VIRTIO_NET_F_CTRL_RX) | BIT(VIRTIO_NET_F_CTRL_VLAN) |                                 \
-	 BIT(VIRTIO_NET_F_CTRL_RX_EXTRA) | BIT(VIRTIO_NET_F_GUEST_ANNOUNCE) |                      \
-	 BIT(VIRTIO_NET_F_MQ) | BIT(VIRTIO_NET_F_CTRL_MAC_ADDR) | BIT(VIRTIO_NET_F_HASH_REPORT) |  \
-	 BIT(VIRTIO_NET_F_RSS) | BIT(VIRTIO_NET_F_RSC_EXT) | BIT(VIRTIO_NET_F_STANDBY) |           \
-	 BIT(VIRTIO_NET_F_SPEED_DUPLEX) | BIT(VIRTIO_F_NOTIFY_ON_EMPTY) |                          \
-	 BIT(VIRTIO_F_ANY_LAYOUT) | BIT(VIRTIO_F_VERSION_1) | BIT(VIRTIO_F_ACCESS_PLATFORM) |      \
-	 BIT(VIRTIO_F_RING_PACKED) | BIT(VIRTIO_F_ORDER_PLATFORM) | BIT(VIRTIO_F_SR_IOV))
+	(BIT_ULL(VIRTIO_NET_F_CSUM) | BIT_ULL(VIRTIO_NET_F_GUEST_CSUM) |                                   \
+	 BIT_ULL(VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) | BIT_ULL(VIRTIO_NET_F_MTU) | BIT_ULL(VIRTIO_NET_F_MAC) |   \
+	 BIT_ULL(VIRTIO_NET_F_GUEST_TSO4) | BIT_ULL(VIRTIO_NET_F_GUEST_TSO6) |                             \
+	 BIT_ULL(VIRTIO_NET_F_GUEST_ECN) | BIT_ULL(VIRTIO_NET_F_GUEST_UFO) | BIT_ULL(VIRTIO_NET_F_HOST_TSO4) | \
+	 BIT_ULL(VIRTIO_NET_F_HOST_TSO6) | BIT_ULL(VIRTIO_NET_F_HOST_ECN) | BIT_ULL(VIRTIO_NET_F_HOST_UFO) |   \
+	 BIT_ULL(VIRTIO_NET_F_MRG_RXBUF) | BIT_ULL(VIRTIO_NET_F_STATUS) | BIT_ULL(VIRTIO_NET_F_CTRL_VQ) |      \
+	 BIT_ULL(VIRTIO_NET_F_CTRL_RX) | BIT_ULL(VIRTIO_NET_F_CTRL_VLAN) |                                 \
+	 BIT_ULL(VIRTIO_NET_F_CTRL_RX_EXTRA) | BIT_ULL(VIRTIO_NET_F_GUEST_ANNOUNCE) |                      \
+	 BIT_ULL(VIRTIO_NET_F_MQ) | BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR) | BIT_ULL(VIRTIO_NET_F_HASH_REPORT) |  \
+	 BIT_ULL(VIRTIO_NET_F_RSS) | BIT_ULL(VIRTIO_NET_F_RSC_EXT) | BIT_ULL(VIRTIO_NET_F_STANDBY) |           \
+	 BIT_ULL(VIRTIO_NET_F_SPEED_DUPLEX) | BIT_ULL(VIRTIO_F_NOTIFY_ON_EMPTY) |                          \
+	 BIT_ULL(VIRTIO_F_ANY_LAYOUT) | BIT_ULL(VIRTIO_F_VERSION_1) | BIT_ULL(VIRTIO_F_ACCESS_PLATFORM) |      \
+	 BIT_ULL(VIRTIO_F_RING_PACKED) | BIT_ULL(VIRTIO_F_ORDER_PLATFORM) | BIT_ULL(VIRTIO_F_SR_IOV))
 
 #define VALID_STATUS_MASK                                                                          \
 	(VIRTIO_CONFIG_S_ACKNOWLEDGE | VIRTIO_CONFIG_S_DRIVER | VIRTIO_CONFIG_S_DRIVER_OK |        \
@@ -149,7 +149,7 @@ static bool mlx5_vdpa_debug;
 
 #define MLX5_LOG_VIO_FLAG(_feature)                                                                \
 	do {                                                                                       \
-		if (features & BIT(_feature))                                                      \
+		if (features & BIT_ULL(_feature))                                                  \
 			mlx5_vdpa_info(mvdev, "%s\n", #_feature);                                  \
 	} while (0)
 
@@ -750,10 +750,10 @@ static bool vq_is_tx(u16 idx)
 
 static u16 get_features_12_3(u64 features)
 {
-	return (!!(features & BIT(VIRTIO_NET_F_HOST_TSO4)) << 9) |
-	       (!!(features & BIT(VIRTIO_NET_F_HOST_TSO6)) << 8) |
-	       (!!(features & BIT(VIRTIO_NET_F_CSUM)) << 7) |
-	       (!!(features & BIT(VIRTIO_NET_F_GUEST_CSUM)) << 6);
+	return (!!(features & BIT_ULL(VIRTIO_NET_F_HOST_TSO4)) << 9) |
+	       (!!(features & BIT_ULL(VIRTIO_NET_F_HOST_TSO6)) << 8) |
+	       (!!(features & BIT_ULL(VIRTIO_NET_F_CSUM)) << 7) |
+	       (!!(features & BIT_ULL(VIRTIO_NET_F_GUEST_CSUM)) << 6);
 }
 
 static int create_virtqueue(struct mlx5_vdpa_net *ndev, struct mlx5_vdpa_virtqueue *mvq)
@@ -1439,13 +1439,13 @@ static u64 mlx_to_vritio_features(u16 dev_features)
 	u64 result = 0;
 
 	if (dev_features & MLX5_VIRTIO_NET_F_GUEST_CSUM)
-		result |= BIT(VIRTIO_NET_F_GUEST_CSUM);
+		result |= BIT_ULL(VIRTIO_NET_F_GUEST_CSUM);
 	if (dev_features & MLX5_VIRTIO_NET_F_CSUM)
-		result |= BIT(VIRTIO_NET_F_CSUM);
+		result |= BIT_ULL(VIRTIO_NET_F_CSUM);
 	if (dev_features & MLX5_VIRTIO_NET_F_HOST_TSO6)
-		result |= BIT(VIRTIO_NET_F_HOST_TSO6);
+		result |= BIT_ULL(VIRTIO_NET_F_HOST_TSO6);
 	if (dev_features & MLX5_VIRTIO_NET_F_HOST_TSO4)
-		result |= BIT(VIRTIO_NET_F_HOST_TSO4);
+		result |= BIT_ULL(VIRTIO_NET_F_HOST_TSO4);
 
 	return result;
 }
@@ -1459,15 +1459,15 @@ static u64 mlx5_vdpa_get_features(struct vdpa_device *vdev)
 	dev_features = MLX5_CAP_DEV_VDPA_EMULATION(mvdev->mdev, device_features_bits_mask);
 	ndev->mvdev.mlx_features = mlx_to_vritio_features(dev_features);
 	if (MLX5_CAP_DEV_VDPA_EMULATION(mvdev->mdev, virtio_version_1_0))
-		ndev->mvdev.mlx_features |= BIT(VIRTIO_F_VERSION_1);
-	ndev->mvdev.mlx_features |= BIT(VIRTIO_F_ACCESS_PLATFORM);
+		ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_F_VERSION_1);
+	ndev->mvdev.mlx_features |= BIT_ULL(VIRTIO_F_ACCESS_PLATFORM);
 	print_features(mvdev, ndev->mvdev.mlx_features, false);
 	return ndev->mvdev.mlx_features;
 }
 
 static int verify_min_features(struct mlx5_vdpa_dev *mvdev, u64 features)
 {
-	if (!(features & BIT(VIRTIO_F_ACCESS_PLATFORM)))
+	if (!(features & BIT_ULL(VIRTIO_F_ACCESS_PLATFORM)))
 		return -EOPNOTSUPP;
 
 	return 0;
-- 
GitLab


From 2e1ec861a605d1d116f8c774f45e9f6a2b593cbb Mon Sep 17 00:00:00 2001
From: Daniel Gorsulowski <daniel.gorsulowski@esd.eu>
Date: Wed, 26 Aug 2020 07:00:14 +0200
Subject: [PATCH 0651/1341] net: dp83869: Fix RGMII internal delay
 configuration

The RGMII control register at 0x32 indicates the states for the bits
RGMII_TX_CLK_DELAY and RGMII_RX_CLK_DELAY as follows:

  RGMII Transmit/Receive Clock Delay
    0x0 = RGMII transmit clock is shifted with respect to transmit/receive data.
    0x1 = RGMII transmit clock is aligned with respect to transmit/receive data.

This commit fixes the inversed behavior of these bits

Fixes: 736b25afe284 ("net: dp83869: Add RGMII internal delay configuration")
Signed-off-by: Daniel Gorsulowski <daniel.gorsulowski@esd.eu>
Acked-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/phy/dp83869.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/phy/dp83869.c b/drivers/net/phy/dp83869.c
index 58103152c6010..6b98d74b5102b 100644
--- a/drivers/net/phy/dp83869.c
+++ b/drivers/net/phy/dp83869.c
@@ -427,18 +427,18 @@ static int dp83869_config_init(struct phy_device *phydev)
 			return ret;
 
 		val = phy_read_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL);
-		val &= ~(DP83869_RGMII_TX_CLK_DELAY_EN |
-			 DP83869_RGMII_RX_CLK_DELAY_EN);
+		val |= (DP83869_RGMII_TX_CLK_DELAY_EN |
+			DP83869_RGMII_RX_CLK_DELAY_EN);
 
 		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
-			val |= (DP83869_RGMII_TX_CLK_DELAY_EN |
-				DP83869_RGMII_RX_CLK_DELAY_EN);
+			val &= ~(DP83869_RGMII_TX_CLK_DELAY_EN |
+				 DP83869_RGMII_RX_CLK_DELAY_EN);
 
 		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
-			val |= DP83869_RGMII_TX_CLK_DELAY_EN;
+			val &= ~DP83869_RGMII_TX_CLK_DELAY_EN;
 
 		if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
-			val |= DP83869_RGMII_RX_CLK_DELAY_EN;
+			val &= ~DP83869_RGMII_RX_CLK_DELAY_EN;
 
 		ret = phy_write_mmd(phydev, DP83869_DEVADDR, DP83869_RGMIICTL,
 				    val);
-- 
GitLab


From c1c2d77408022a398a1a7c51cf20488c922629de Mon Sep 17 00:00:00 2001
From: Pavan Chebbi <pavan.chebbi@broadcom.com>
Date: Wed, 26 Aug 2020 01:08:32 -0400
Subject: [PATCH 0652/1341] bnxt_en: Don't query FW when netif_running() is
 false.

In rare conditions like two stage OS installation, the
ethtool's get_channels function may be called when the
device is in D3 state, leading to uncorrectable PCI error.
Check netif_running() first before making any query to FW
which involves writing to BAR.

Fixes: db4723b3cd2d ("bnxt_en: Check max_tx_scheduler_inputs value from firmware.")
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 64da654f10389..3890c1aaeed6d 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -806,7 +806,7 @@ static void bnxt_get_channels(struct net_device *dev,
 	int max_tx_sch_inputs;
 
 	/* Get the most up-to-date max_tx_sch_inputs. */
-	if (BNXT_NEW_RM(bp))
+	if (netif_running(dev) && BNXT_NEW_RM(bp))
 		bnxt_hwrm_func_resc_qcaps(bp, false);
 	max_tx_sch_inputs = hw_resc->max_tx_sch_inputs;
 
-- 
GitLab


From dbbfa96ad920c50d58bcaefa57f5f33ceef9d00e Mon Sep 17 00:00:00 2001
From: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Date: Wed, 26 Aug 2020 01:08:33 -0400
Subject: [PATCH 0653/1341] bnxt_en: Check for zero dir entries in NVRAM.

If firmware goes into unstable state, HWRM_NVM_GET_DIR_INFO firmware
command may return zero dir entries. Return error in such case to
avoid zero length dma buffer request.

Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 3890c1aaeed6d..5d1a0cd0b53e6 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -2323,6 +2323,9 @@ static int bnxt_get_nvram_directory(struct net_device *dev, u32 len, u8 *data)
 	if (rc != 0)
 		return rc;
 
+	if (!dir_entries || !entry_length)
+		return -EIO;
+
 	/* Insert 2 bytes of directory info (count and size of entries) */
 	if (len < 2)
 		return -EINVAL;
-- 
GitLab


From 7de651490c27ebc5edb5c7224c368bd0cd5b3862 Mon Sep 17 00:00:00 2001
From: Michael Chan <michael.chan@broadcom.com>
Date: Wed, 26 Aug 2020 01:08:34 -0400
Subject: [PATCH 0654/1341] bnxt_en: Fix ethtool -S statitics with XDP or TCs
 enabled.

We are returning the wrong count for ETH_SS_STATS in get_sset_count()
when XDP or TCs are enabled.  In a recent commit, we got rid of
irrelevant counters when the ring is RX only or TX only, but we
did not make the proper adjustments for the count.  As a result,
when we have XDP or TCs enabled, we are returning an excess count
because some of the rings are TX only.  This causes ethtool -S to
display extra counters with no counter names.

Fix bnxt_get_num_ring_stats() by not assuming that all rings will
always have RX and TX counters in combined mode.

Fixes: 125592fbf467 ("bnxt_en: show only relevant ethtool stats for a TX or RX ring")
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index 5d1a0cd0b53e6..1bc5130458bf3 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -472,20 +472,13 @@ static int bnxt_get_num_tpa_ring_stats(struct bnxt *bp)
 static int bnxt_get_num_ring_stats(struct bnxt *bp)
 {
 	int rx, tx, cmn;
-	bool sh = false;
-
-	if (bp->flags & BNXT_FLAG_SHARED_RINGS)
-		sh = true;
 
 	rx = NUM_RING_RX_HW_STATS + NUM_RING_RX_SW_STATS +
 	     bnxt_get_num_tpa_ring_stats(bp);
 	tx = NUM_RING_TX_HW_STATS;
 	cmn = NUM_RING_CMN_SW_STATS;
-	if (sh)
-		return (rx + tx + cmn) * bp->cp_nr_rings;
-	else
-		return rx * bp->rx_nr_rings + tx * bp->tx_nr_rings +
-		       cmn * bp->cp_nr_rings;
+	return rx * bp->rx_nr_rings + tx * bp->tx_nr_rings +
+	       cmn * bp->cp_nr_rings;
 }
 
 static int bnxt_get_num_stats(struct bnxt *bp)
-- 
GitLab


From df3875ec550396974b1d8a518bd120d034738236 Mon Sep 17 00:00:00 2001
From: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Date: Wed, 26 Aug 2020 01:08:35 -0400
Subject: [PATCH 0655/1341] bnxt_en: Fix PCI AER error recovery flow

When a PCI error is detected the PCI state could be corrupt, save
the PCI state after initialization and restore it after the slot
reset.

Fixes: 6316ea6db93d ("bnxt_en: Enable AER support.")
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 31fb5a28e1c4f..4389a74c0d539 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -12339,6 +12339,7 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 		    (long)pci_resource_start(pdev, 0), dev->dev_addr);
 	pcie_print_link_status(pdev);
 
+	pci_save_state(pdev);
 	return 0;
 
 init_err_cleanup:
@@ -12536,6 +12537,8 @@ static pci_ers_result_t bnxt_io_slot_reset(struct pci_dev *pdev)
 			"Cannot re-enable PCI device after reset.\n");
 	} else {
 		pci_set_master(pdev);
+		pci_restore_state(pdev);
+		pci_save_state(pdev);
 
 		err = bnxt_hwrm_func_reset(bp);
 		if (!err) {
-- 
GitLab


From b148bb238c02f0c7797efed026e9bba5892d2172 Mon Sep 17 00:00:00 2001
From: Michael Chan <michael.chan@broadcom.com>
Date: Wed, 26 Aug 2020 01:08:36 -0400
Subject: [PATCH 0656/1341] bnxt_en: Fix possible crash in
 bnxt_fw_reset_task().

bnxt_fw_reset_task() is run from a delayed workqueue.  The current
code is not cancelling the workqueue in the driver's .remove()
method and it can potentially crash if the device is removed with
the workqueue still pending.

The fix is to clear the BNXT_STATE_IN_FW_RESET flag and then cancel
the delayed workqueue in bnxt_remove_one().  bnxt_queue_fw_reset_work()
also needs to check that this flag is set before scheduling.  This
will guarantee that no rescheduling will be done after it is cancelled.

Fixes: 230d1f0de754 ("bnxt_en: Handle firmware reset.")
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 4389a74c0d539..d6f35929020c6 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -1141,6 +1141,9 @@ static int bnxt_discard_rx(struct bnxt *bp, struct bnxt_cp_ring_info *cpr,
 
 static void bnxt_queue_fw_reset_work(struct bnxt *bp, unsigned long delay)
 {
+	if (!(test_bit(BNXT_STATE_IN_FW_RESET, &bp->state)))
+		return;
+
 	if (BNXT_PF(bp))
 		queue_delayed_work(bnxt_pf_wq, &bp->fw_reset_task, delay);
 	else
@@ -1157,10 +1160,12 @@ static void bnxt_queue_sp_work(struct bnxt *bp)
 
 static void bnxt_cancel_sp_work(struct bnxt *bp)
 {
-	if (BNXT_PF(bp))
+	if (BNXT_PF(bp)) {
 		flush_workqueue(bnxt_pf_wq);
-	else
+	} else {
 		cancel_work_sync(&bp->sp_task);
+		cancel_delayed_work_sync(&bp->fw_reset_task);
+	}
 }
 
 static void bnxt_sched_reset(struct bnxt *bp, struct bnxt_rx_ring_info *rxr)
@@ -11761,6 +11766,7 @@ static void bnxt_remove_one(struct pci_dev *pdev)
 	unregister_netdev(dev);
 	bnxt_dl_unregister(bp);
 	bnxt_shutdown_tc(bp);
+	clear_bit(BNXT_STATE_IN_FW_RESET, &bp->state);
 	bnxt_cancel_sp_work(bp);
 	bp->sp_event = 0;
 
-- 
GitLab


From 12cce90b934bf2b0ed9c339b4d5503e69954351a Mon Sep 17 00:00:00 2001
From: Edwin Peer <edwin.peer@broadcom.com>
Date: Wed, 26 Aug 2020 01:08:37 -0400
Subject: [PATCH 0657/1341] bnxt_en: fix HWRM error when querying VF
 temperature

Firmware returns RESOURCE_ACCESS_DENIED for HWRM_TEMP_MONITORY_QUERY for
VFs. This produces unpleasing error messages in the log when temp1_input
is queried via the hwmon sysfs interface from a VF.

The error is harmless and expected, so silence it and return unknown as
the value. Since the device temperature is not particularly sensitive
information, provide flexibility to change this policy in future by
silencing the error rather than avoiding the HWRM call entirely for VFs.

Fixes: cde49a42a9bb ("bnxt_en: Add hwmon sysfs support to read temperature")
Cc: Marc Smith <msmith626@gmail.com>
Reported-by: Marc Smith <msmith626@gmail.com>
Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index d6f35929020c6..a23ccb0392a6c 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -9289,16 +9289,19 @@ static ssize_t bnxt_show_temp(struct device *dev,
 	struct hwrm_temp_monitor_query_input req = {0};
 	struct hwrm_temp_monitor_query_output *resp;
 	struct bnxt *bp = dev_get_drvdata(dev);
-	u32 temp = 0;
+	u32 len = 0;
 
 	resp = bp->hwrm_cmd_resp_addr;
 	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_TEMP_MONITOR_QUERY, -1, -1);
 	mutex_lock(&bp->hwrm_cmd_lock);
-	if (!_hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT))
-		temp = resp->temp * 1000; /* display millidegree */
+	if (!_hwrm_send_message_silent(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT))
+		len = sprintf(buf, "%u\n", resp->temp * 1000); /* display millidegree */
 	mutex_unlock(&bp->hwrm_cmd_lock);
 
-	return sprintf(buf, "%u\n", temp);
+	if (len)
+		return len;
+
+	return sprintf(buf, "unknown\n");
 }
 static SENSOR_DEVICE_ATTR(temp1_input, 0444, bnxt_show_temp, NULL, 0);
 
-- 
GitLab


From 5fa65524f6e0b9528c6ceac3f33f7e8f0c3a084a Mon Sep 17 00:00:00 2001
From: Edwin Peer <edwin.peer@broadcom.com>
Date: Wed, 26 Aug 2020 01:08:38 -0400
Subject: [PATCH 0658/1341] bnxt_en: init RSS table for Minimal-Static VF
 reservation

There are no VF rings available during probe when the device is configured
using the Minimal-Static reservation strategy. In this case, the RSS
indirection table can only be initialized later, during bnxt_open_nic().
However, this was not happening because the rings will already have been
reserved via bnxt_init_dflt_ring_mode(), causing bnxt_need_reserve_rings()
to return false in bnxt_reserve_rings() and bypass the RSS table init.

Solve this by pushing the call to bnxt_set_dflt_rss_indir_tbl() into
__bnxt_reserve_rings(), which is common to both paths and is called
whenever ring configuration is changed. After doing this, the RSS table
init that must be called from bnxt_init_one() happens implicitly via
bnxt_set_default_rings(), necessitating doing the allocation earlier in
order to avoid a null pointer dereference.

Fixes: bd3191b5d87d ("bnxt_en: Implement ethtool -X to set indirection table.")
Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index a23ccb0392a6c..27df5721353d9 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6219,6 +6219,9 @@ static int __bnxt_reserve_rings(struct bnxt *bp)
 	if (!tx || !rx || !cp || !grp || !vnic || !stat)
 		return -ENOMEM;
 
+	if (!netif_is_rxfh_configured(bp->dev))
+		bnxt_set_dflt_rss_indir_tbl(bp);
+
 	return rc;
 }
 
@@ -8500,9 +8503,6 @@ int bnxt_reserve_rings(struct bnxt *bp, bool irq_re_init)
 			rc = bnxt_init_int_mode(bp);
 		bnxt_ulp_irq_restart(bp, rc);
 	}
-	if (!netif_is_rxfh_configured(bp->dev))
-		bnxt_set_dflt_rss_indir_tbl(bp);
-
 	if (rc) {
 		netdev_err(bp->dev, "ring reservation/IRQ init failure rc: %d\n", rc);
 		return rc;
@@ -12209,6 +12209,10 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	if (BNXT_CHIP_P5(bp))
 		bp->flags |= BNXT_FLAG_CHIP_P5;
 
+	rc = bnxt_alloc_rss_indir_tbl(bp);
+	if (rc)
+		goto init_err_pci_clean;
+
 	rc = bnxt_fw_init_one_p2(bp);
 	if (rc)
 		goto init_err_pci_clean;
@@ -12313,11 +12317,6 @@ static int bnxt_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 	 */
 	bp->tx_nr_rings_per_tc = bp->tx_nr_rings;
 
-	rc = bnxt_alloc_rss_indir_tbl(bp);
-	if (rc)
-		goto init_err_pci_clean;
-	bnxt_set_dflt_rss_indir_tbl(bp);
-
 	if (BNXT_PF(bp)) {
 		if (!bnxt_pf_wq) {
 			bnxt_pf_wq =
-- 
GitLab


From b43b9f53fbb06faa4f2fcdbf235db3289026e2e4 Mon Sep 17 00:00:00 2001
From: Michael Chan <michael.chan@broadcom.com>
Date: Wed, 26 Aug 2020 01:08:39 -0400
Subject: [PATCH 0659/1341] bnxt_en: Setup default RSS map in all scenarios.

The recent changes to support user-defined RSS map assume that RX
rings are always reserved and the default RSS map is set after the
RX rings are successfully reserved.  If the firmware spec is older
than 1.6.1, no ring reservations are required and the default RSS
map is not setup at all.  In another scenario where the fw Resource
Manager is older, RX rings are not reserved and we also end up with
no valid RSS map.

Fix both issues in bnxt_need_reserve_rings().  In both scenarios
described above, we don't need to reserve RX rings so we need to
call this new function bnxt_check_rss_map_no_rmgr() to setup the
default RSS map when needed.

Without valid RSS map, the NIC won't receive packets properly.

Fixes: 1667cbf6a4eb ("bnxt_en: Add logical RSS indirection table structure.")
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 39 +++++++++++++++++------
 1 file changed, 30 insertions(+), 9 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 27df5721353d9..316227136f5b3 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -6107,6 +6107,21 @@ static int bnxt_get_func_stat_ctxs(struct bnxt *bp)
 	return cp + ulp_stat;
 }
 
+/* Check if a default RSS map needs to be setup.  This function is only
+ * used on older firmware that does not require reserving RX rings.
+ */
+static void bnxt_check_rss_tbl_no_rmgr(struct bnxt *bp)
+{
+	struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
+
+	/* The RSS map is valid for RX rings set to resv_rx_rings */
+	if (hw_resc->resv_rx_rings != bp->rx_nr_rings) {
+		hw_resc->resv_rx_rings = bp->rx_nr_rings;
+		if (!netif_is_rxfh_configured(bp->dev))
+			bnxt_set_dflt_rss_indir_tbl(bp);
+	}
+}
+
 static bool bnxt_need_reserve_rings(struct bnxt *bp)
 {
 	struct bnxt_hw_resc *hw_resc = &bp->hw_resc;
@@ -6115,22 +6130,28 @@ static bool bnxt_need_reserve_rings(struct bnxt *bp)
 	int rx = bp->rx_nr_rings, stat;
 	int vnic = 1, grp = rx;
 
-	if (bp->hwrm_spec_code < 0x10601)
-		return false;
-
-	if (hw_resc->resv_tx_rings != bp->tx_nr_rings)
+	if (hw_resc->resv_tx_rings != bp->tx_nr_rings &&
+	    bp->hwrm_spec_code >= 0x10601)
 		return true;
 
+	/* Old firmware does not need RX ring reservations but we still
+	 * need to setup a default RSS map when needed.  With new firmware
+	 * we go through RX ring reservations first and then set up the
+	 * RSS map for the successfully reserved RX rings when needed.
+	 */
+	if (!BNXT_NEW_RM(bp)) {
+		bnxt_check_rss_tbl_no_rmgr(bp);
+		return false;
+	}
 	if ((bp->flags & BNXT_FLAG_RFS) && !(bp->flags & BNXT_FLAG_CHIP_P5))
 		vnic = rx + 1;
 	if (bp->flags & BNXT_FLAG_AGG_RINGS)
 		rx <<= 1;
 	stat = bnxt_get_func_stat_ctxs(bp);
-	if (BNXT_NEW_RM(bp) &&
-	    (hw_resc->resv_rx_rings != rx || hw_resc->resv_cp_rings != cp ||
-	     hw_resc->resv_vnics != vnic || hw_resc->resv_stat_ctxs != stat ||
-	     (hw_resc->resv_hw_ring_grps != grp &&
-	      !(bp->flags & BNXT_FLAG_CHIP_P5))))
+	if (hw_resc->resv_rx_rings != rx || hw_resc->resv_cp_rings != cp ||
+	    hw_resc->resv_vnics != vnic || hw_resc->resv_stat_ctxs != stat ||
+	    (hw_resc->resv_hw_ring_grps != grp &&
+	     !(bp->flags & BNXT_FLAG_CHIP_P5)))
 		return true;
 	if ((bp->flags & BNXT_FLAG_CHIP_P5) && BNXT_PF(bp) &&
 	    hw_resc->resv_irqs != nq)
-- 
GitLab


From a156998fc92d3859c8e820f1583f6d0541d643c3 Mon Sep 17 00:00:00 2001
From: Yi Li <yili@winhong.com>
Date: Wed, 26 Aug 2020 13:11:50 +0800
Subject: [PATCH 0660/1341] net: hns3: Fix for geneve tx checksum bug

when skb->encapsulation is 0, skb->ip_summed is CHECKSUM_PARTIAL
and it is udp packet, which has a dest port as the IANA assigned.
the hardware is expected to do the checksum offload, but the
hardware will not do the checksum offload when udp dest port is
6081.

This patch fixes it by doing the checksum in software.

Reported-by: Li Bing <libing@winhong.com>
Signed-off-by: Yi Li <yili@winhong.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/hisilicon/hns3/hns3_enet.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
index 87776ce3539b4..7d83c45369c22 100644
--- a/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns3/hns3_enet.c
@@ -21,6 +21,7 @@
 #include <net/pkt_cls.h>
 #include <net/tcp.h>
 #include <net/vxlan.h>
+#include <net/geneve.h>
 
 #include "hnae3.h"
 #include "hns3_enet.h"
@@ -780,7 +781,7 @@ static int hns3_get_l4_protocol(struct sk_buff *skb, u8 *ol4_proto,
  * and it is udp packet, which has a dest port as the IANA assigned.
  * the hardware is expected to do the checksum offload, but the
  * hardware will not do the checksum offload when udp dest port is
- * 4789.
+ * 4789 or 6081.
  */
 static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
 {
@@ -789,7 +790,8 @@ static bool hns3_tunnel_csum_bug(struct sk_buff *skb)
 	l4.hdr = skb_transport_header(skb);
 
 	if (!(!skb->encapsulation &&
-	      l4.udp->dest == htons(IANA_VXLAN_UDP_PORT)))
+	      (l4.udp->dest == htons(IANA_VXLAN_UDP_PORT) ||
+	      l4.udp->dest == htons(GENEVE_UDP_PORT))))
 		return false;
 
 	skb_checksum_help(skb);
-- 
GitLab


From bec2ddfd39f07ac2c1dec9fd5299424ad75c0a9d Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Sun, 23 Aug 2020 07:02:57 +0200
Subject: [PATCH 0661/1341] media: ti-vpe: cal: Fix compilation on 32-bit ARM

When compiled on 32-bit ARM, the CAL driver fails with the FIELD_PREP()
macro complaining that the mask is not constant. While all callers of
the inline cal_write_field() function pass a constant mask, the mask
parameter itself is a variable, which likely doesn't please the
compiler.

Fix it by replacing FIELD_PREP() with a manual implementation.

Fixes: 50797fb30b95 ("media: ti-vpe: cal: Turn reg_(read|write)_field() into inline functions")
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reported-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/platform/ti-vpe/cal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/platform/ti-vpe/cal.h b/drivers/media/platform/ti-vpe/cal.h
index e496083715d21..4123405ee0cf7 100644
--- a/drivers/media/platform/ti-vpe/cal.h
+++ b/drivers/media/platform/ti-vpe/cal.h
@@ -226,7 +226,7 @@ static inline void cal_write_field(struct cal_dev *cal, u32 offset, u32 value,
 	u32 val = cal_read(cal, offset);
 
 	val &= ~mask;
-	val |= FIELD_PREP(mask, value);
+	val |= (value << __ffs(mask)) & mask;
 	cal_write(cal, offset, val);
 }
 
-- 
GitLab


From 4ffb879ea648c2b42da4ca992ed3db87e564af69 Mon Sep 17 00:00:00 2001
From: Peilin Ye <yepeilin.cs@gmail.com>
Date: Mon, 27 Jul 2020 10:00:02 +0200
Subject: [PATCH 0662/1341] media: media/v4l2-core: Fix kernel-infoleak in
 video_put_user()

video_put_user() is copying uninitialized stack memory to userspace due
to the compiler not initializing holes in the structures declared on the
stack. Fix it by initializing `ev32` and `vb32` using memset().

Reported-and-tested-by: syzbot+79d751604cb6f29fbf59@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?extid=79d751604cb6f29fbf59

Cc: stable@vger.kernel.org
Fixes: 1a6c0b36dd19 ("media: v4l2-core: fix VIDIOC_DQEVENT for time64 ABI")
Fixes: 577c89b0ce72 ("media: v4l2-core: fix v4l2_buffer handling for time64 ABI")
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/v4l2-core/v4l2-ioctl.c | 50 +++++++++++++++-------------
 1 file changed, 27 insertions(+), 23 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index a556880f225a5..e3a25ea913ac0 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -3189,14 +3189,16 @@ static int video_put_user(void __user *arg, void *parg, unsigned int cmd)
 #ifdef CONFIG_COMPAT_32BIT_TIME
 	case VIDIOC_DQEVENT_TIME32: {
 		struct v4l2_event *ev = parg;
-		struct v4l2_event_time32 ev32 = {
-			.type		= ev->type,
-			.pending	= ev->pending,
-			.sequence	= ev->sequence,
-			.timestamp.tv_sec  = ev->timestamp.tv_sec,
-			.timestamp.tv_nsec = ev->timestamp.tv_nsec,
-			.id		= ev->id,
-		};
+		struct v4l2_event_time32 ev32;
+
+		memset(&ev32, 0, sizeof(ev32));
+
+		ev32.type	= ev->type;
+		ev32.pending	= ev->pending;
+		ev32.sequence	= ev->sequence;
+		ev32.timestamp.tv_sec	= ev->timestamp.tv_sec;
+		ev32.timestamp.tv_nsec	= ev->timestamp.tv_nsec;
+		ev32.id		= ev->id;
 
 		memcpy(&ev32.u, &ev->u, sizeof(ev->u));
 		memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
@@ -3210,21 +3212,23 @@ static int video_put_user(void __user *arg, void *parg, unsigned int cmd)
 	case VIDIOC_DQBUF_TIME32:
 	case VIDIOC_PREPARE_BUF_TIME32: {
 		struct v4l2_buffer *vb = parg;
-		struct v4l2_buffer_time32 vb32 = {
-			.index		= vb->index,
-			.type		= vb->type,
-			.bytesused	= vb->bytesused,
-			.flags		= vb->flags,
-			.field		= vb->field,
-			.timestamp.tv_sec	= vb->timestamp.tv_sec,
-			.timestamp.tv_usec	= vb->timestamp.tv_usec,
-			.timecode	= vb->timecode,
-			.sequence	= vb->sequence,
-			.memory		= vb->memory,
-			.m.userptr	= vb->m.userptr,
-			.length		= vb->length,
-			.request_fd	= vb->request_fd,
-		};
+		struct v4l2_buffer_time32 vb32;
+
+		memset(&vb32, 0, sizeof(vb32));
+
+		vb32.index	= vb->index;
+		vb32.type	= vb->type;
+		vb32.bytesused	= vb->bytesused;
+		vb32.flags	= vb->flags;
+		vb32.field	= vb->field;
+		vb32.timestamp.tv_sec	= vb->timestamp.tv_sec;
+		vb32.timestamp.tv_usec	= vb->timestamp.tv_usec;
+		vb32.timecode	= vb->timecode;
+		vb32.sequence	= vb->sequence;
+		vb32.memory	= vb->memory;
+		vb32.m.userptr	= vb->m.userptr;
+		vb32.length	= vb->length;
+		vb32.request_fd	= vb->request_fd;
 
 		if (copy_to_user(arg, &vb32, sizeof(vb32)))
 			return -EFAULT;
-- 
GitLab


From 5fd99b5d9950d6300467ded18ff4e44af0b4ae55 Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Wed, 26 Aug 2020 14:52:31 +0800
Subject: [PATCH 0663/1341] net: cdc_ncm: Fix build error

If USB_NET_CDC_NCM is y and USB_NET_CDCETHER is m, build fails:

drivers/net/usb/cdc_ncm.o:(.rodata+0x1d8): undefined reference to `usbnet_cdc_update_filter'

Select USB_NET_CDCETHER for USB_NET_CDC_NCM to fix this.

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: e10dcb1b6ba7 ("net: cdc_ncm: hook into set_rx_mode to admit multicast traffic")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/usb/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/usb/Kconfig b/drivers/net/usb/Kconfig
index a7fbc3ccd29e4..c7bcfca7d70b0 100644
--- a/drivers/net/usb/Kconfig
+++ b/drivers/net/usb/Kconfig
@@ -252,6 +252,7 @@ config USB_NET_CDC_EEM
 config USB_NET_CDC_NCM
 	tristate "CDC NCM support"
 	depends on USB_USBNET
+	select USB_NET_CDCETHER
 	default y
 	help
 	  This driver provides support for CDC NCM (Network Control Model
-- 
GitLab


From acb19e17c5134dd78668c429ecba5b481f038e6a Mon Sep 17 00:00:00 2001
From: Hou Pu <houpu@bytedance.com>
Date: Mon, 10 Aug 2020 08:00:44 -0400
Subject: [PATCH 0664/1341] nbd: restore default timeout when setting it to
 zero

If we configured io timeout of nbd0 to 100s. Later after we
finished using it, we configured nbd0 again and set the io
timeout to 0. We expect it would timeout after 30 seconds
and keep retry. But in fact we could not change the timeout
when we set it to 0. the timeout is still the original 100s.

So change the timeout to default 30s when we set it to zero.
It also behaves same as commit 2da22da57348 ("nbd: fix zero
cmd timeout handling v2").

It becomes more important if we were reconfigure a nbd device
and the io timeout it set to zero. Because it could take 30s
to detect the new socket and thus io could be completed more
quickly compared to 100s.

Signed-off-by: Hou Pu <houpu@bytedance.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/nbd.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 3ff4054d6834d..edf8b632e3d27 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -1363,6 +1363,8 @@ static void nbd_set_cmd_timeout(struct nbd_device *nbd, u64 timeout)
 	nbd->tag_set.timeout = timeout * HZ;
 	if (timeout)
 		blk_queue_rq_timeout(nbd->disk->queue, timeout * HZ);
+	else
+		blk_queue_rq_timeout(nbd->disk->queue, 30 * HZ);
 }
 
 /* Must be called with config_lock held */
-- 
GitLab


From 79e5dc59e2974a48764269fa9ff544ae8ffe3338 Mon Sep 17 00:00:00 2001
From: Martijn Coenen <maco@android.com>
Date: Tue, 25 Aug 2020 09:18:29 +0200
Subject: [PATCH 0665/1341] loop: Set correct device size when using
 LOOP_CONFIGURE

The device size calculation was done before processing the loop
configuration, which meant that the we set the size on the underlying
block device incorrectly in case lo_offset/lo_sizelimit were set in the
configuration. Delay computing the size until we've setup the device
parameters correctly.

Fixes: 3448914e8cc5("loop: Add LOOP_CONFIGURE ioctl")
Reported-by: Lennart Poettering <mzxreary@0pointer.de>
Tested-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
Signed-off-by: Martijn Coenen <maco@android.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/block/loop.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 3d7a1901bf28c..03ce01c648748 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1114,8 +1114,6 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
 	mapping = file->f_mapping;
 	inode = mapping->host;
 
-	size = get_loop_size(lo, file);
-
 	if ((config->info.lo_flags & ~LOOP_CONFIGURE_SETTABLE_FLAGS) != 0) {
 		error = -EINVAL;
 		goto out_unlock;
@@ -1165,6 +1163,8 @@ static int loop_configure(struct loop_device *lo, fmode_t mode,
 	loop_update_rotational(lo);
 	loop_update_dio(lo);
 	loop_sysfs_init(lo);
+
+	size = get_loop_size(lo, file);
 	loop_set_size(lo, size);
 
 	set_blocksize(bdev, S_ISBLK(inode->i_mode) ?
-- 
GitLab


From 1196f12a2c960951d02262af25af0bb1775ebcc2 Mon Sep 17 00:00:00 2001
From: Sven Schnelle <svens@linux.ibm.com>
Date: Thu, 20 Aug 2020 09:48:23 +0200
Subject: [PATCH 0666/1341] s390: don't trace preemption in percpu macros

Since commit a21ee6055c30 ("lockdep: Change hardirq{s_enabled,_context}
to per-cpu variables") the lockdep code itself uses percpu variables. This
leads to recursions because the percpu macros are calling preempt_enable()
which might call trace_preempt_on().

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 arch/s390/include/asm/percpu.h | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/s390/include/asm/percpu.h b/arch/s390/include/asm/percpu.h
index 50b4ce8cddfdc..918f0ba4f4d20 100644
--- a/arch/s390/include/asm/percpu.h
+++ b/arch/s390/include/asm/percpu.h
@@ -29,7 +29,7 @@
 	typedef typeof(pcp) pcp_op_T__;					\
 	pcp_op_T__ old__, new__, prev__;				\
 	pcp_op_T__ *ptr__;						\
-	preempt_disable();						\
+	preempt_disable_notrace();					\
 	ptr__ = raw_cpu_ptr(&(pcp));					\
 	prev__ = *ptr__;						\
 	do {								\
@@ -37,7 +37,7 @@
 		new__ = old__ op (val);					\
 		prev__ = cmpxchg(ptr__, old__, new__);			\
 	} while (prev__ != old__);					\
-	preempt_enable();						\
+	preempt_enable_notrace();					\
 	new__;								\
 })
 
@@ -68,7 +68,7 @@
 	typedef typeof(pcp) pcp_op_T__; 				\
 	pcp_op_T__ val__ = (val);					\
 	pcp_op_T__ old__, *ptr__;					\
-	preempt_disable();						\
+	preempt_disable_notrace();					\
 	ptr__ = raw_cpu_ptr(&(pcp)); 				\
 	if (__builtin_constant_p(val__) &&				\
 	    ((szcast)val__ > -129) && ((szcast)val__ < 128)) {		\
@@ -84,7 +84,7 @@
 			: [val__] "d" (val__)				\
 			: "cc");					\
 	}								\
-	preempt_enable();						\
+	preempt_enable_notrace();					\
 }
 
 #define this_cpu_add_4(pcp, val) arch_this_cpu_add(pcp, val, "laa", "asi", int)
@@ -95,14 +95,14 @@
 	typedef typeof(pcp) pcp_op_T__; 				\
 	pcp_op_T__ val__ = (val);					\
 	pcp_op_T__ old__, *ptr__;					\
-	preempt_disable();						\
+	preempt_disable_notrace();					\
 	ptr__ = raw_cpu_ptr(&(pcp));	 				\
 	asm volatile(							\
 		op "    %[old__],%[val__],%[ptr__]\n"			\
 		: [old__] "=d" (old__), [ptr__] "+Q" (*ptr__)		\
 		: [val__] "d" (val__)					\
 		: "cc");						\
-	preempt_enable();						\
+	preempt_enable_notrace();						\
 	old__ + val__;							\
 })
 
@@ -114,14 +114,14 @@
 	typedef typeof(pcp) pcp_op_T__; 				\
 	pcp_op_T__ val__ = (val);					\
 	pcp_op_T__ old__, *ptr__;					\
-	preempt_disable();						\
+	preempt_disable_notrace();					\
 	ptr__ = raw_cpu_ptr(&(pcp));	 				\
 	asm volatile(							\
 		op "    %[old__],%[val__],%[ptr__]\n"			\
 		: [old__] "=d" (old__), [ptr__] "+Q" (*ptr__)		\
 		: [val__] "d" (val__)					\
 		: "cc");						\
-	preempt_enable();						\
+	preempt_enable_notrace();					\
 }
 
 #define this_cpu_and_4(pcp, val)	arch_this_cpu_to_op(pcp, val, "lan")
@@ -136,10 +136,10 @@
 	typedef typeof(pcp) pcp_op_T__;					\
 	pcp_op_T__ ret__;						\
 	pcp_op_T__ *ptr__;						\
-	preempt_disable();						\
+	preempt_disable_notrace();					\
 	ptr__ = raw_cpu_ptr(&(pcp));					\
 	ret__ = cmpxchg(ptr__, oval, nval);				\
-	preempt_enable();						\
+	preempt_enable_notrace();					\
 	ret__;								\
 })
 
@@ -152,10 +152,10 @@
 ({									\
 	typeof(pcp) *ptr__;						\
 	typeof(pcp) ret__;						\
-	preempt_disable();						\
+	preempt_disable_notrace();					\
 	ptr__ = raw_cpu_ptr(&(pcp));					\
 	ret__ = xchg(ptr__, nval);					\
-	preempt_enable();						\
+	preempt_enable_notrace();					\
 	ret__;								\
 })
 
@@ -171,11 +171,11 @@
 	typeof(pcp1) *p1__;						\
 	typeof(pcp2) *p2__;						\
 	int ret__;							\
-	preempt_disable();						\
+	preempt_disable_notrace();					\
 	p1__ = raw_cpu_ptr(&(pcp1));					\
 	p2__ = raw_cpu_ptr(&(pcp2));					\
 	ret__ = __cmpxchg_double(p1__, p2__, o1__, o2__, n1__, n2__);	\
-	preempt_enable();						\
+	preempt_enable_notrace();					\
 	ret__;								\
 })
 
-- 
GitLab


From bffc2f7aa96343f91931272d7a8a2d8d925e1ab2 Mon Sep 17 00:00:00 2001
From: Vasily Gorbik <gor@linux.ibm.com>
Date: Fri, 21 Aug 2020 18:27:36 +0200
Subject: [PATCH 0667/1341] s390/vmem: fix vmem_add_range for 4-level paging

The kernel currently crashes if 4-level paging is used. Add missing
p4d_populate for just allocated pud entry.

Fixes: 3e0d3e408e63 ("s390/vmem: consolidate vmem_add_range() and vmem_remove_range()")
Reviewed-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 arch/s390/mm/vmem.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 1aed1a4dfc2d6..eddf71c22875e 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -402,6 +402,7 @@ static int modify_p4d_table(pgd_t *pgd, unsigned long addr, unsigned long end,
 			pud = vmem_crst_alloc(_REGION3_ENTRY_EMPTY);
 			if (!pud)
 				goto out;
+			p4d_populate(&init_mm, p4d, pud);
 		}
 		ret = modify_pud_table(p4d, addr, next, add, direct);
 		if (ret)
-- 
GitLab


From d4f07268d035721dd055ceb0de98ace6ac5f858b Mon Sep 17 00:00:00 2001
From: Steve Wahl <steve.wahl@hpe.com>
Date: Mon, 24 Aug 2020 17:14:39 -0500
Subject: [PATCH 0668/1341] MAINTAINERS: Add entry for HPE Superdome Flex (UV)
 maintainers

Add an entry and email addresses for people at HPE who are supporting
Linux on the Superdome Flex (a.k.a) UV platform.

 [ bp: Capitalize "linux" too :) ]

Signed-off-by: Steve Wahl <steve.wahl@hpe.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200824221439.GA52810@swahl-home.5wahls.com
---
 MAINTAINERS | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index b0a742ce8f2cf..4c8a682eae7a6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -18873,6 +18873,15 @@ S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/core
 F:	arch/x86/platform
 
+X86 PLATFORM UV HPE SUPERDOME FLEX
+M:	Steve Wahl <steve.wahl@hpe.com>
+R:	Dimitri Sivanich <dimitri.sivanich@hpe.com>
+R:	Russ Anderson <russ.anderson@hpe.com>
+S:	Supported
+F:	arch/x86/include/asm/uv/
+F:	arch/x86/kernel/apic/x2apic_uv_x.c
+F:	arch/x86/platform/uv/
+
 X86 VDSO
 M:	Andy Lutomirski <luto@kernel.org>
 L:	linux-kernel@vger.kernel.org
-- 
GitLab


From 0fef948363f62494d779cf9dc3c0a86ea1e5f7cd Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Wed, 26 Aug 2020 10:36:20 -0600
Subject: [PATCH 0669/1341] io_uring: make offset == -1 consistent with
 preadv2/pwritev2

The man page for io_uring generally claims were consistent with what
preadv2 and pwritev2 accept, but turns out there's a slight discrepancy
in how offset == -1 is handled for pipes/streams. preadv doesn't allow
it, but preadv2 does. This currently causes io_uring to return -EINVAL
if that is attempted, but we should allow that as documented.

This change makes us consistent with preadv2/pwritev2 for just passing
in a NULL ppos for streams if the offset is -1.

Cc: stable@vger.kernel.org # v5.7+
Reported-by: Benedikt Ames <wisp3rwind@posteo.eu>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index d9b88644d5e8a..bd2d8de3f2e8f 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2866,6 +2866,11 @@ static ssize_t io_import_iovec(int rw, struct io_kiocb *req,
 	return iov_iter_count(&req->io->rw.iter);
 }
 
+static inline loff_t *io_kiocb_ppos(struct kiocb *kiocb)
+{
+	return kiocb->ki_filp->f_mode & FMODE_STREAM ? NULL : &kiocb->ki_pos;
+}
+
 /*
  * For files that don't have ->read_iter() and ->write_iter(), handle them
  * by looping over ->read() or ->write() manually.
@@ -2901,10 +2906,10 @@ static ssize_t loop_rw_iter(int rw, struct file *file, struct kiocb *kiocb,
 
 		if (rw == READ) {
 			nr = file->f_op->read(file, iovec.iov_base,
-					      iovec.iov_len, &kiocb->ki_pos);
+					      iovec.iov_len, io_kiocb_ppos(kiocb));
 		} else {
 			nr = file->f_op->write(file, iovec.iov_base,
-					       iovec.iov_len, &kiocb->ki_pos);
+					       iovec.iov_len, io_kiocb_ppos(kiocb));
 		}
 
 		if (iov_iter_is_bvec(iter))
@@ -3139,7 +3144,7 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
 		goto copy_iov;
 
 	iov_count = iov_iter_count(iter);
-	ret = rw_verify_area(READ, req->file, &kiocb->ki_pos, iov_count);
+	ret = rw_verify_area(READ, req->file, io_kiocb_ppos(kiocb), iov_count);
 	if (unlikely(ret))
 		goto out_free;
 
@@ -3262,7 +3267,7 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
 		goto copy_iov;
 
 	iov_count = iov_iter_count(iter);
-	ret = rw_verify_area(WRITE, req->file, &kiocb->ki_pos, iov_count);
+	ret = rw_verify_area(WRITE, req->file, io_kiocb_ppos(kiocb), iov_count);
 	if (unlikely(ret))
 		goto out_free;
 
-- 
GitLab


From 6e0c9b5f90978287b5a3d38ee83203d295f375f1 Mon Sep 17 00:00:00 2001
From: Vinod Koul <vkoul@kernel.org>
Date: Wed, 26 Aug 2020 22:03:36 +0530
Subject: [PATCH 0670/1341] ASoC: max98373: Fix return check for
 devm_regmap_init_sdw()

devm_regmap_init_sdw() returns a valid pointer on success or ERR_PTR on
failure which should be checked with IS_ERR. Also use PTR_ERR for
returning error codes.

Reported-by: Takashi Iwai <tiwai@suse.de>
Fixes: 56a5b7910e96 ("ASoC: codecs: max98373: add SoundWire support")
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200826163340.3249608-2-vkoul@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/max98373-sdw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/max98373-sdw.c b/sound/soc/codecs/max98373-sdw.c
index 5fe724728e84e..e4675cfff7b2f 100644
--- a/sound/soc/codecs/max98373-sdw.c
+++ b/sound/soc/codecs/max98373-sdw.c
@@ -838,8 +838,8 @@ static int max98373_sdw_probe(struct sdw_slave *slave,
 
 	/* Regmap Initialization */
 	regmap = devm_regmap_init_sdw(slave, &max98373_sdw_regmap);
-	if (!regmap)
-		return -EINVAL;
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
 
 	return max98373_init(slave, regmap);
 }
-- 
GitLab


From 344850d93c098e1b17e6f89d5e436893e9762ef3 Mon Sep 17 00:00:00 2001
From: Vinod Koul <vkoul@kernel.org>
Date: Wed, 26 Aug 2020 22:03:37 +0530
Subject: [PATCH 0671/1341] ASoC: rt1308-sdw: Fix return check for
 devm_regmap_init_sdw()

devm_regmap_init_sdw() returns a valid pointer on success or ERR_PTR on
failure which should be checked with IS_ERR. Also use PTR_ERR for
returning error codes.

Reported-by: Takashi Iwai <tiwai@suse.de>
Fixes: a87a6653a28c ("ASoC: rt1308-sdw: add rt1308 SdW amplifier driver")
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200826163340.3249608-3-vkoul@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/rt1308-sdw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/rt1308-sdw.c b/sound/soc/codecs/rt1308-sdw.c
index b0ba0d2acbdd6..56e952a904a39 100644
--- a/sound/soc/codecs/rt1308-sdw.c
+++ b/sound/soc/codecs/rt1308-sdw.c
@@ -684,8 +684,8 @@ static int rt1308_sdw_probe(struct sdw_slave *slave,
 
 	/* Regmap Initialization */
 	regmap = devm_regmap_init_sdw(slave, &rt1308_sdw_regmap);
-	if (!regmap)
-		return -EINVAL;
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
 
 	rt1308_sdw_init(&slave->dev, regmap, slave);
 
-- 
GitLab


From be1a4b2c56db860a220c6f74d461188e5733264a Mon Sep 17 00:00:00 2001
From: Vinod Koul <vkoul@kernel.org>
Date: Wed, 26 Aug 2020 22:03:38 +0530
Subject: [PATCH 0672/1341] ASoC: rt711: Fix return check for
 devm_regmap_init_sdw()

devm_regmap_init_sdw() returns a valid pointer on success or ERR_PTR on
failure which should be checked with IS_ERR. Also use PTR_ERR for
returning error codes.

Reported-by: Takashi Iwai <tiwai@suse.de>
Fixes: 320b8b0d13b8 ("ASoC: rt711: add rt711 codec driver")
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200826163340.3249608-4-vkoul@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/rt711-sdw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/rt711-sdw.c b/sound/soc/codecs/rt711-sdw.c
index 45b928954b580..7efff130a638c 100644
--- a/sound/soc/codecs/rt711-sdw.c
+++ b/sound/soc/codecs/rt711-sdw.c
@@ -452,8 +452,8 @@ static int rt711_sdw_probe(struct sdw_slave *slave,
 
 	/* Regmap Initialization */
 	sdw_regmap = devm_regmap_init_sdw(slave, &rt711_sdw_regmap);
-	if (!sdw_regmap)
-		return -EINVAL;
+	if (IS_ERR(sdw_regmap))
+		return PTR_ERR(sdw_regmap);
 
 	regmap = devm_regmap_init(&slave->dev, NULL,
 		&slave->dev, &rt711_regmap);
-- 
GitLab


From 282eb0b52e3f0399ee48a4cad0d9ffec840b0164 Mon Sep 17 00:00:00 2001
From: Vinod Koul <vkoul@kernel.org>
Date: Wed, 26 Aug 2020 22:03:39 +0530
Subject: [PATCH 0673/1341] ASoC: rt715: Fix return check for
 devm_regmap_init_sdw()

devm_regmap_init_sdw() returns a valid pointer on success or ERR_PTR on
failure which should be checked with IS_ERR. Also use PTR_ERR for
returning error codes.

Reported-by: Takashi Iwai <tiwai@suse.de>
Fixes: d1ede0641b05 ("ASoC: rt715: add RT715 codec driver")
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200826163340.3249608-5-vkoul@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/rt715-sdw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/rt715-sdw.c b/sound/soc/codecs/rt715-sdw.c
index d11b23d6b240a..68a36739f1b0d 100644
--- a/sound/soc/codecs/rt715-sdw.c
+++ b/sound/soc/codecs/rt715-sdw.c
@@ -527,8 +527,8 @@ static int rt715_sdw_probe(struct sdw_slave *slave,
 
 	/* Regmap Initialization */
 	sdw_regmap = devm_regmap_init_sdw(slave, &rt715_sdw_regmap);
-	if (!sdw_regmap)
-		return -EINVAL;
+	if (IS_ERR(sdw_regmap))
+		return PTR_ERR(sdw_regmap);
 
 	regmap = devm_regmap_init(&slave->dev, NULL, &slave->dev,
 		&rt715_regmap);
-- 
GitLab


From db1a4250aef53775ec0094b81454213319cc8c74 Mon Sep 17 00:00:00 2001
From: Vinod Koul <vkoul@kernel.org>
Date: Wed, 26 Aug 2020 22:03:40 +0530
Subject: [PATCH 0674/1341] ASoC: rt700: Fix return check for
 devm_regmap_init_sdw()

devm_regmap_init_sdw() returns a valid pointer on success or ERR_PTR on
failure which should be checked with IS_ERR. Also use PTR_ERR for
returning error codes.

Reported-by: Takashi Iwai <tiwai@suse.de>
Fixes: 7d2a5f9ae41e ("ASoC: rt700: add rt700 codec driver")
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200826163340.3249608-6-vkoul@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/rt700-sdw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/rt700-sdw.c b/sound/soc/codecs/rt700-sdw.c
index 4d14048d11976..1d24bf0407182 100644
--- a/sound/soc/codecs/rt700-sdw.c
+++ b/sound/soc/codecs/rt700-sdw.c
@@ -452,8 +452,8 @@ static int rt700_sdw_probe(struct sdw_slave *slave,
 
 	/* Regmap Initialization */
 	sdw_regmap = devm_regmap_init_sdw(slave, &rt700_sdw_regmap);
-	if (!sdw_regmap)
-		return -EINVAL;
+	if (IS_ERR(sdw_regmap))
+		return PTR_ERR(sdw_regmap);
 
 	regmap = devm_regmap_init(&slave->dev, NULL,
 		&slave->dev, &rt700_regmap);
-- 
GitLab


From c1e6414cdc371f9ed82cefebba7538499a3059f9 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Thu, 20 Aug 2020 12:28:27 +0800
Subject: [PATCH 0675/1341] ASoC: qcom: common: Fix refcount imbalance on error

for_each_child_of_node returns a node pointer np with
refcount incremented. So when devm_kzalloc fails, a
pairing refcount decrement is needed to keep np's
refcount balanced.

Fixes: 16395ceee11f8 ("ASoC: qcom: common: Fix NULL pointer in of parser")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Link: https://lore.kernel.org/r/20200820042828.10308-1-dinghao.liu@zju.edu.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/qcom/common.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/sound/soc/qcom/common.c b/sound/soc/qcom/common.c
index 5194d90ddb964..fd69cf8b1f23a 100644
--- a/sound/soc/qcom/common.c
+++ b/sound/soc/qcom/common.c
@@ -52,8 +52,10 @@ int qcom_snd_parse_of(struct snd_soc_card *card)
 
 	for_each_child_of_node(dev->of_node, np) {
 		dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL);
-		if (!dlc)
-			return -ENOMEM;
+		if (!dlc) {
+			ret = -ENOMEM;
+			goto err;
+		}
 
 		link->cpus	= &dlc[0];
 		link->platforms	= &dlc[1];
-- 
GitLab


From 858e0ad9301d1270c02b5aca97537d2d6ee9dd68 Mon Sep 17 00:00:00 2001
From: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Date: Wed, 26 Aug 2020 20:03:06 +0300
Subject: [PATCH 0676/1341] ALSA: hda/hdmi: always check pin power status in
 i915 pin fixup

When system is suspended with active audio playback to HDMI/DP, two
alternative sequences can happen at resume:
  a) monitor is detected first and ALSA prepare follows normal
     stream setup sequence, or
  b) ALSA prepare is called first, but monitor is not yet detected,
     so PCM is restarted without a pin,

In case of (b), on i915 systems, haswell_verify_D0() is not called at
resume and the pin power state may be incorrect. Result is lack of audio
after resume with no error reported back to user-space.

Fix the problem by always verifying converter and pin state in the
i915_pin_cvt_fixup().

BugLink: https://github.com/thesofproject/linux/issues/2388
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200826170306.701566-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_hdmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 3259d713ace9d..1e1b13eb78292 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -2794,6 +2794,7 @@ static void i915_pin_cvt_fixup(struct hda_codec *codec,
 			       hda_nid_t cvt_nid)
 {
 	if (per_pin) {
+		haswell_verify_D0(codec, per_pin->cvt_nid, per_pin->pin_nid);
 		snd_hda_set_dev_select(codec, per_pin->pin_nid,
 			       per_pin->dev_id);
 		intel_verify_pin_cvt_connect(codec, per_pin);
-- 
GitLab


From b19a8b3d36697d8cf8f9a305d85a313d931fef71 Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Date: Tue, 25 Aug 2020 18:57:12 -0500
Subject: [PATCH 0677/1341] iio: dpot-dac: fix code comment in
 dpot_dac_read_raw()

After the replacement of the /* fall through */ comment with the
fallthrough pseudo-keyword macro, the natural reading of a code
comment was broken.

Fix the natural reading of such a comment and make it intelligible.

Reported-by: Peter Rosin <peda@axentia.se>
Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/iio/dac/dpot-dac.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/dac/dpot-dac.c b/drivers/iio/dac/dpot-dac.c
index be61c3b01e8b1..1a9609eda5c5c 100644
--- a/drivers/iio/dac/dpot-dac.c
+++ b/drivers/iio/dac/dpot-dac.c
@@ -74,10 +74,11 @@ static int dpot_dac_read_raw(struct iio_dev *indio_dev,
 		case IIO_VAL_INT:
 			/*
 			 * Convert integer scale to fractional scale by
-			 * setting the denominator (val2) to one, and...
+			 * setting the denominator (val2) to one...
 			 */
 			*val2 = 1;
 			ret = IIO_VAL_FRACTIONAL;
+			/* ...and fall through. Say it again for GCC. */
 			fallthrough;
 		case IIO_VAL_FRACTIONAL:
 			*val *= regulator_get_voltage(dac->vref) / 1000;
-- 
GitLab


From ed9ab229fea24cbcab17f484297dc8344afb7ea9 Mon Sep 17 00:00:00 2001
From: Tong Zhang <ztong0001@gmail.com>
Date: Sun, 16 Aug 2020 03:32:12 -0400
Subject: [PATCH 0678/1341] drm/amd/display: should check error using DC_OK

core_link_read_dpcd returns only DC_OK(1) and DC_ERROR_UNEXPECTED(-1),
the caller should check error using DC_OK instead of checking against 0

Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 9bc03f26efdaf..b2be6ad5101de 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -4409,9 +4409,9 @@ bool dc_link_get_backlight_level_nits(struct dc_link *link,
 			link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
 		return false;
 
-	if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_CURRENT_PEAK,
+	if (core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_CURRENT_PEAK,
 			dpcd_backlight_get.raw,
-			sizeof(union dpcd_source_backlight_get)))
+			sizeof(union dpcd_source_backlight_get)) != DC_OK)
 		return false;
 
 	*backlight_millinits_avg =
@@ -4450,9 +4450,9 @@ bool dc_link_read_default_bl_aux(struct dc_link *link, uint32_t *backlight_milli
 		link->connector_signal != SIGNAL_TYPE_DISPLAY_PORT))
 		return false;
 
-	if (!core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL,
+	if (core_link_read_dpcd(link, DP_SOURCE_BACKLIGHT_LEVEL,
 		(uint8_t *) backlight_millinits,
-		sizeof(uint32_t)))
+		sizeof(uint32_t)) != DC_OK)
 		return false;
 
 	return true;
-- 
GitLab


From 69d9f4278d0f9d24607645f10e5ac5c59c77a4ac Mon Sep 17 00:00:00 2001
From: Alexander Monakov <amonakov@ispras.ru>
Date: Tue, 4 Aug 2020 23:13:13 +0300
Subject: [PATCH 0679/1341] drm/amd/display: use correct scale for
 actual_brightness

Documentation for sysfs backlight level interface requires that
values in both 'brightness' and 'actual_brightness' files are
interpreted to be in range from 0 to the value given in the
'max_brightness' file.

With amdgpu, max_brightness gives 255, and values written by the user
into 'brightness' are internally rescaled to a wider range. However,
reading from 'actual_brightness' gives the raw register value without
inverse rescaling. This causes issues for various userspace tools such
as PowerTop and systemd that expect the value to be in the correct
range.

Introduce a helper to retrieve internal backlight range. Use it to
reimplement 'convert_brightness' as 'convert_brightness_from_user' and
introduce 'convert_brightness_to_user'.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=203905
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1242
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alexander Monakov <amonakov@ispras.ru>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 81 +++++++++----------
 1 file changed, 40 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index df9338257ae0d..4c8a692836986 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2894,51 +2894,50 @@ static int set_backlight_via_aux(struct dc_link *link, uint32_t brightness)
 	return rc ? 0 : 1;
 }
 
-static u32 convert_brightness(const struct amdgpu_dm_backlight_caps *caps,
-			      const uint32_t user_brightness)
+static int get_brightness_range(const struct amdgpu_dm_backlight_caps *caps,
+				unsigned *min, unsigned *max)
 {
-	u32 min, max, conversion_pace;
-	u32 brightness = user_brightness;
-
 	if (!caps)
-		goto out;
+		return 0;
 
-	if (!caps->aux_support) {
-		max = caps->max_input_signal;
-		min = caps->min_input_signal;
-		/*
-		 * The brightness input is in the range 0-255
-		 * It needs to be rescaled to be between the
-		 * requested min and max input signal
-		 * It also needs to be scaled up by 0x101 to
-		 * match the DC interface which has a range of
-		 * 0 to 0xffff
-		 */
-		conversion_pace = 0x101;
-		brightness =
-			user_brightness
-			* conversion_pace
-			* (max - min)
-			/ AMDGPU_MAX_BL_LEVEL
-			+ min * conversion_pace;
+	if (caps->aux_support) {
+		// Firmware limits are in nits, DC API wants millinits.
+		*max = 1000 * caps->aux_max_input_signal;
+		*min = 1000 * caps->aux_min_input_signal;
 	} else {
-		/* TODO
-		 * We are doing a linear interpolation here, which is OK but
-		 * does not provide the optimal result. We probably want
-		 * something close to the Perceptual Quantizer (PQ) curve.
-		 */
-		max = caps->aux_max_input_signal;
-		min = caps->aux_min_input_signal;
-
-		brightness = (AMDGPU_MAX_BL_LEVEL - user_brightness) * min
-			       + user_brightness * max;
-		// Multiple the value by 1000 since we use millinits
-		brightness *= 1000;
-		brightness = DIV_ROUND_CLOSEST(brightness, AMDGPU_MAX_BL_LEVEL);
+		// Firmware limits are 8-bit, PWM control is 16-bit.
+		*max = 0x101 * caps->max_input_signal;
+		*min = 0x101 * caps->min_input_signal;
 	}
+	return 1;
+}
+
+static u32 convert_brightness_from_user(const struct amdgpu_dm_backlight_caps *caps,
+					uint32_t brightness)
+{
+	unsigned min, max;
 
-out:
-	return brightness;
+	if (!get_brightness_range(caps, &min, &max))
+		return brightness;
+
+	// Rescale 0..255 to min..max
+	return min + DIV_ROUND_CLOSEST((max - min) * brightness,
+				       AMDGPU_MAX_BL_LEVEL);
+}
+
+static u32 convert_brightness_to_user(const struct amdgpu_dm_backlight_caps *caps,
+				      uint32_t brightness)
+{
+	unsigned min, max;
+
+	if (!get_brightness_range(caps, &min, &max))
+		return brightness;
+
+	if (brightness < min)
+		return 0;
+	// Rescale min..max to 0..255
+	return DIV_ROUND_CLOSEST(AMDGPU_MAX_BL_LEVEL * (brightness - min),
+				 max - min);
 }
 
 static int amdgpu_dm_backlight_update_status(struct backlight_device *bd)
@@ -2954,7 +2953,7 @@ static int amdgpu_dm_backlight_update_status(struct backlight_device *bd)
 
 	link = (struct dc_link *)dm->backlight_link;
 
-	brightness = convert_brightness(&caps, bd->props.brightness);
+	brightness = convert_brightness_from_user(&caps, bd->props.brightness);
 	// Change brightness based on AUX property
 	if (caps.aux_support)
 		return set_backlight_via_aux(link, brightness);
@@ -2971,7 +2970,7 @@ static int amdgpu_dm_backlight_get_brightness(struct backlight_device *bd)
 
 	if (ret == DC_ERROR_UNEXPECTED)
 		return bd->props.brightness;
-	return ret;
+	return convert_brightness_to_user(&dm->backlight_caps, ret);
 }
 
 static const struct backlight_ops amdgpu_dm_backlight_ops = {
-- 
GitLab


From 168f09cdadbd547c2b202246ef9a8183da725f13 Mon Sep 17 00:00:00 2001
From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Date: Wed, 19 Aug 2020 13:37:54 -0400
Subject: [PATCH 0680/1341] drm/amd/display: Reject overlay plane
 configurations in multi-display scenarios

[Why]
These aren't stable on some platform configurations when driving
multiple displays, especially on higher resolution.

In particular the delay in asserting p-state and validating from
x86 outweights any power or performance benefit from the hardware
composition.

Under some configurations this will manifest itself as extreme stutter
or unresponsiveness especially when combined with cursor movement.

[How]
Disable these for now. Exposing overlays to userspace doesn't guarantee
that they'll be able to use them in any and all configurations and it's
part of the DRM contract to have userspace gracefully handle validation
failures when they occur.

Valdiation occurs as part of DC and this in particular affects RV, so
disable this in dcn10_global_validation.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
index 17d5cb422025e..8939541ad7afc 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c
@@ -1213,6 +1213,7 @@ static enum dc_status dcn10_validate_global(struct dc *dc, struct dc_state *cont
 	bool video_large = false;
 	bool desktop_large = false;
 	bool dcc_disabled = false;
+	bool mpo_enabled = false;
 
 	for (i = 0; i < context->stream_count; i++) {
 		if (context->stream_status[i].plane_count == 0)
@@ -1221,6 +1222,9 @@ static enum dc_status dcn10_validate_global(struct dc *dc, struct dc_state *cont
 		if (context->stream_status[i].plane_count > 2)
 			return DC_FAIL_UNSUPPORTED_1;
 
+		if (context->stream_status[i].plane_count > 1)
+			mpo_enabled = true;
+
 		for (j = 0; j < context->stream_status[i].plane_count; j++) {
 			struct dc_plane_state *plane =
 				context->stream_status[i].plane_states[j];
@@ -1244,6 +1248,10 @@ static enum dc_status dcn10_validate_global(struct dc *dc, struct dc_state *cont
 		}
 	}
 
+	/* Disable MPO in multi-display configurations. */
+	if (context->stream_count > 1 && mpo_enabled)
+		return DC_FAIL_UNSUPPORTED_1;
+
 	/*
 	 * Workaround: On DCN10 there is UMC issue that causes underflow when
 	 * playing 4k video on 4k desktop with video downscaled and single channel
-- 
GitLab


From 5896585512e5156482335e902f7c7393b940da51 Mon Sep 17 00:00:00 2001
From: Furquan Shaikh <furquan@google.com>
Date: Thu, 20 Aug 2020 00:52:41 -0700
Subject: [PATCH 0681/1341] drivers: gpu: amd: Initialize
 amdgpu_dm_backlight_caps object to 0 in amdgpu_dm_update_backlight_caps
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In `amdgpu_dm_update_backlight_caps()`, there is a local
`amdgpu_dm_backlight_caps` object that is filled in by
`amdgpu_acpi_get_backlight_caps()`. However, this object is
uninitialized before the call and hence the subsequent check for
aux_support can fail since it is not initialized by
`amdgpu_acpi_get_backlight_caps()` as well. This change initializes
this local `amdgpu_dm_backlight_caps` object to 0.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Furquan Shaikh <furquan@google.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 4c8a692836986..778edf427b94d 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2856,6 +2856,8 @@ static void amdgpu_dm_update_backlight_caps(struct amdgpu_display_manager *dm)
 #if defined(CONFIG_ACPI)
 	struct amdgpu_dm_backlight_caps caps;
 
+	memset(&caps, 0, sizeof(caps));
+
 	if (dm->backlight_caps.caps_valid)
 		return;
 
-- 
GitLab


From f2cdef66dcef44bc26c06a2c070617272b1360a1 Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Fri, 21 Aug 2020 11:30:19 +0800
Subject: [PATCH 0682/1341] drm/amd/pm: enable run_btc callback for
 sienna_cichlid

DC BTC support for sienna_cichlid is added, it provides
the DC tolerance and aging measurements.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
index 3865dbed5f935..d722bf0c98be2 100644
--- a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
@@ -95,6 +95,7 @@ static struct cmn2asic_msg_mapping sienna_cichlid_message_map[SMU_MSG_MAX_COUNT]
 	MSG_MAP(TransferTableSmu2Dram,		PPSMC_MSG_TransferTableSmu2Dram,       0),
 	MSG_MAP(TransferTableDram2Smu,		PPSMC_MSG_TransferTableDram2Smu,       0),
 	MSG_MAP(UseDefaultPPTable,		PPSMC_MSG_UseDefaultPPTable,           0),
+	MSG_MAP(RunDcBtc,			PPSMC_MSG_RunDcBtc,                    0),
 	MSG_MAP(EnterBaco,			PPSMC_MSG_EnterBaco,                   0),
 	MSG_MAP(SetSoftMinByFreq,		PPSMC_MSG_SetSoftMinByFreq,            0),
 	MSG_MAP(SetSoftMaxByFreq,		PPSMC_MSG_SetSoftMaxByFreq,            0),
@@ -1732,6 +1733,11 @@ static int sienna_cichlid_get_dpm_ultimate_freq(struct smu_context *smu,
 	return ret;
 }
 
+static int sienna_cichlid_run_btc(struct smu_context *smu)
+{
+	return smu_cmn_send_smc_msg(smu, SMU_MSG_RunDcBtc, NULL);
+}
+
 static bool sienna_cichlid_is_baco_supported(struct smu_context *smu)
 {
 	struct amdgpu_device *adev = smu->adev;
@@ -2719,6 +2725,7 @@ static const struct pptable_funcs sienna_cichlid_ppt_funcs = {
 	.mode1_reset = smu_v11_0_mode1_reset,
 	.get_dpm_ultimate_freq = sienna_cichlid_get_dpm_ultimate_freq,
 	.set_soft_freq_limited_range = smu_v11_0_set_soft_freq_limited_range,
+	.run_btc = sienna_cichlid_run_btc,
 	.get_pp_feature_mask = smu_cmn_get_pp_feature_mask,
 	.set_pp_feature_mask = smu_cmn_set_pp_feature_mask,
 };
-- 
GitLab


From 317951ee922cb561c0da62f6bbc568c96b2ad0d1 Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Fri, 21 Aug 2020 16:20:47 +0800
Subject: [PATCH 0683/1341] drm/amd/pm: set VCN pg per instances

When deciding whether to set pg for vcn1, instances
number is more generic than chip name.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
index d722bf0c98be2..638760839c150 100644
--- a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
@@ -776,7 +776,7 @@ static int sienna_cichlid_dpm_set_vcn_enable(struct smu_context *smu, bool enabl
 			ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_PowerUpVcn, 0, NULL);
 			if (ret)
 				return ret;
-			if (adev->asic_type == CHIP_SIENNA_CICHLID) {
+			if (adev->vcn.num_vcn_inst > 1) {
 				ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_PowerUpVcn,
 								  0x10000, NULL);
 				if (ret)
@@ -788,7 +788,7 @@ static int sienna_cichlid_dpm_set_vcn_enable(struct smu_context *smu, bool enabl
 			ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_PowerDownVcn, 0, NULL);
 			if (ret)
 				return ret;
-			if (adev->asic_type == CHIP_SIENNA_CICHLID) {
+			if (adev->vcn.num_vcn_inst > 1) {
 				ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_PowerDownVcn,
 								  0x10000, NULL);
 				if (ret)
-- 
GitLab


From b05d71b51078fc428c6b72582126d9d75d3c1f4c Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Fri, 21 Aug 2020 12:05:03 +0800
Subject: [PATCH 0684/1341] drm/amd/pm: correct Vega10 swctf limit setting

Correct the Vega10 thermal swctf limit.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1267

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
index 468bdd6f66973..ce9514c881ec2 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
@@ -363,6 +363,9 @@ int vega10_thermal_get_temperature(struct pp_hwmgr *hwmgr)
 static int vega10_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 		struct PP_TemperatureRange *range)
 {
+	struct phm_ppt_v2_information *pp_table_info =
+		(struct phm_ppt_v2_information *)(hwmgr->pptable);
+	struct phm_tdp_table *tdp_table = pp_table_info->tdp_table;
 	struct amdgpu_device *adev = hwmgr->adev;
 	int low = VEGA10_THERMAL_MINIMUM_ALERT_TEMP *
 			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
@@ -372,8 +375,8 @@ static int vega10_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 
 	if (low < range->min)
 		low = range->min;
-	if (high > range->max)
-		high = range->max;
+	if (high > tdp_table->usSoftwareShutdownTemp)
+		high = tdp_table->usSoftwareShutdownTemp;
 
 	if (low > high)
 		return -EINVAL;
-- 
GitLab


From e0ffd340249699ad27a6c91abdfa3e89f7823941 Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Fri, 21 Aug 2020 12:18:58 +0800
Subject: [PATCH 0685/1341] drm/amd/pm: correct Vega12 swctf limit setting

Correct the Vega12 thermal swctf limit.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c
index c15b9756025d9..e755fc0c98860 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c
@@ -170,6 +170,8 @@ int vega12_thermal_get_temperature(struct pp_hwmgr *hwmgr)
 static int vega12_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 		struct PP_TemperatureRange *range)
 {
+	struct phm_ppt_v3_information *pptable_information =
+		(struct phm_ppt_v3_information *)hwmgr->pptable;
 	struct amdgpu_device *adev = hwmgr->adev;
 	int low = VEGA12_THERMAL_MINIMUM_ALERT_TEMP *
 			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
@@ -179,8 +181,8 @@ static int vega12_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 
 	if (low < range->min)
 		low = range->min;
-	if (high > range->max)
-		high = range->max;
+	if (high > pptable_information->us_software_shutdown_temp)
+		high = pptable_information->us_software_shutdown_temp;
 
 	if (low > high)
 		return -EINVAL;
-- 
GitLab


From 9b51c4b2ba31396f3894ccc7df8bdf067243e9f5 Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Fri, 21 Aug 2020 12:21:30 +0800
Subject: [PATCH 0686/1341] drm/amd/pm: correct Vega20 swctf limit setting

Correct the Vega20 thermal swctf limit.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c
index 7add2f60f49c4..a9bc9d16641a2 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c
@@ -240,6 +240,8 @@ int vega20_thermal_get_temperature(struct pp_hwmgr *hwmgr)
 static int vega20_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 		struct PP_TemperatureRange *range)
 {
+	struct phm_ppt_v3_information *pptable_information =
+		(struct phm_ppt_v3_information *)hwmgr->pptable;
 	struct amdgpu_device *adev = hwmgr->adev;
 	int low = VEGA20_THERMAL_MINIMUM_ALERT_TEMP *
 			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
@@ -249,8 +251,8 @@ static int vega20_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 
 	if (low < range->min)
 		low = range->min;
-	if (high > range->max)
-		high = range->max;
+	if (high > pptable_information->us_software_shutdown_temp)
+		high = pptable_information->us_software_shutdown_temp;
 
 	if (low > high)
 		return -EINVAL;
-- 
GitLab


From de7a1b0b8753e1b0000084f0e339ffab295d27ef Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Mon, 24 Aug 2020 18:44:09 +0800
Subject: [PATCH 0687/1341] drm/amdgpu/gfx10: refine mgcg setting

1. enable ENABLE_CGTS_LEGACY to fix specviewperf11 random hang.
2. remove obsolete RLC_CGTT_SCLK_OVERRIDE workaround.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
index 65997ffaed456..037a187aa42f3 100644
--- a/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c
@@ -7263,10 +7263,8 @@ static void gfx_v10_0_update_medium_grain_clock_gating(struct amdgpu_device *ade
 		def = data = RREG32_SOC15(GC, 0, mmRLC_CGTT_MGCG_OVERRIDE);
 		data &= ~(RLC_CGTT_MGCG_OVERRIDE__GRBM_CGTT_SCLK_OVERRIDE_MASK |
 			  RLC_CGTT_MGCG_OVERRIDE__GFXIP_MGCG_OVERRIDE_MASK |
-			  RLC_CGTT_MGCG_OVERRIDE__GFXIP_MGLS_OVERRIDE_MASK);
-
-		/* only for Vega10 & Raven1 */
-		data |= RLC_CGTT_MGCG_OVERRIDE__RLC_CGTT_SCLK_OVERRIDE_MASK;
+			  RLC_CGTT_MGCG_OVERRIDE__GFXIP_MGLS_OVERRIDE_MASK |
+			  RLC_CGTT_MGCG_OVERRIDE__ENABLE_CGTS_LEGACY_MASK);
 
 		if (def != data)
 			WREG32_SOC15(GC, 0, mmRLC_CGTT_MGCG_OVERRIDE, data);
-- 
GitLab


From d2ce14fd99e91f3de667e5dba5b9affa3e40e725 Mon Sep 17 00:00:00 2001
From: Sung Lee <sung.lee@amd.com>
Date: Tue, 11 Aug 2020 17:23:20 -0400
Subject: [PATCH 0688/1341] drm/amd/display: Send DISPLAY_OFF after power down
 on boot

[WHY]
update_clocks might not be called on headless adapters. This means
DISPLAY_OFF may not be sent in headless cases.

[HOW]
If hardware is powered down on boot because it is headless (mode set
does not happen on that adapter) also send DISPLAY_OFF notification.

Signed-off-by: Sung Lee <sung.lee@amd.com>
Reviewed-by: Yongqiang Sun <yongqiang.sun@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | 10 ++++
 .../amd/display/dc/dcn10/dcn10_hw_sequencer.c | 53 +++++++++++--------
 .../gpu/drm/amd/display/dc/inc/hw/clk_mgr.h   |  2 +
 3 files changed, 43 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
index c664404a75d4f..543afa34d87aa 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
@@ -94,6 +94,15 @@ int rn_get_active_display_cnt_wa(
 	return display_count;
 }
 
+void rn_set_low_power_state(struct clk_mgr *clk_mgr_base)
+{
+	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
+
+	rn_vbios_smu_set_dcn_low_power_state(clk_mgr, DCN_PWR_STATE_LOW_POWER);
+	/* update power state */
+	clk_mgr_base->clks.pwr_state = DCN_PWR_STATE_LOW_POWER;
+}
+
 void rn_update_clocks(struct clk_mgr *clk_mgr_base,
 			struct dc_state *context,
 			bool safe_to_lower)
@@ -516,6 +525,7 @@ static struct clk_mgr_funcs dcn21_funcs = {
 	.init_clocks = rn_init_clocks,
 	.enable_pme_wa = rn_enable_pme_wa,
 	.are_clock_states_equal = rn_are_clock_states_equal,
+	.set_low_power_state = rn_set_low_power_state,
 	.notify_wm_ranges = rn_notify_wm_ranges,
 	.notify_link_rate_change = rn_notify_link_rate_change,
 };
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index a643927e272bd..fa643ec5a8760 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -1450,33 +1450,42 @@ void dcn10_init_hw(struct dc *dc)
 void dcn10_power_down_on_boot(struct dc *dc)
 {
 	int i = 0;
+	struct dc_link *edp_link;
 
-	if (dc->config.power_down_display_on_boot) {
-		struct dc_link *edp_link = get_edp_link(dc);
-
-		if (edp_link &&
-				edp_link->link_enc->funcs->is_dig_enabled &&
-				edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) &&
-				dc->hwseq->funcs.edp_backlight_control &&
-				dc->hwss.power_down &&
-				dc->hwss.edp_power_control) {
-			dc->hwseq->funcs.edp_backlight_control(edp_link, false);
-			dc->hwss.power_down(dc);
-			dc->hwss.edp_power_control(edp_link, false);
-		} else {
-			for (i = 0; i < dc->link_count; i++) {
-				struct dc_link *link = dc->links[i];
-
-				if (link->link_enc->funcs->is_dig_enabled &&
-						link->link_enc->funcs->is_dig_enabled(link->link_enc) &&
-						dc->hwss.power_down) {
-					dc->hwss.power_down(dc);
-					break;
-				}
+	if (!dc->config.power_down_display_on_boot)
+		return;
+
+	edp_link = get_edp_link(dc);
+	if (edp_link &&
+			edp_link->link_enc->funcs->is_dig_enabled &&
+			edp_link->link_enc->funcs->is_dig_enabled(edp_link->link_enc) &&
+			dc->hwseq->funcs.edp_backlight_control &&
+			dc->hwss.power_down &&
+			dc->hwss.edp_power_control) {
+		dc->hwseq->funcs.edp_backlight_control(edp_link, false);
+		dc->hwss.power_down(dc);
+		dc->hwss.edp_power_control(edp_link, false);
+	} else {
+		for (i = 0; i < dc->link_count; i++) {
+			struct dc_link *link = dc->links[i];
 
+			if (link->link_enc->funcs->is_dig_enabled &&
+					link->link_enc->funcs->is_dig_enabled(link->link_enc) &&
+					dc->hwss.power_down) {
+				dc->hwss.power_down(dc);
+				break;
 			}
+
 		}
 	}
+
+	/*
+	 * Call update_clocks with empty context
+	 * to send DISPLAY_OFF
+	 * Otherwise DISPLAY_OFF may not be asserted
+	 */
+	if (dc->clk_mgr->funcs->set_low_power_state)
+		dc->clk_mgr->funcs->set_low_power_state(dc->clk_mgr);
 }
 
 void dcn10_reset_hw_ctx_wrap(
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
index 5994d2a33c40b..947d6106f3413 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr.h
@@ -230,6 +230,8 @@ struct clk_mgr_funcs {
 
 	int (*get_dp_ref_clk_frequency)(struct clk_mgr *clk_mgr);
 
+	void (*set_low_power_state)(struct clk_mgr *clk_mgr);
+
 	void (*init_clocks)(struct clk_mgr *clk_mgr);
 
 	void (*enable_pme_wa) (struct clk_mgr *clk_mgr);
-- 
GitLab


From b61f05622ace5b9498ae279cdfd1c9f0c1ce3f75 Mon Sep 17 00:00:00 2001
From: Jaehyun Chung <jaehyun.chung@amd.com>
Date: Mon, 10 Aug 2020 16:02:47 -0400
Subject: [PATCH 0689/1341] drm/amd/display: Revert HDCP disable sequence
 change

[Why]
Revert HDCP disable sequence change that blanks stream before
disabling HDCP. PSP and HW teams are currently investigating the
root cause of why HDCP cannot be disabled before stream blank,
which is expected to work without issues.

Signed-off-by: Jaehyun Chung <jaehyun.chung@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 117d8aaf2a9bf..405452b736e1d 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -3286,10 +3286,10 @@ void core_link_disable_stream(struct pipe_ctx *pipe_ctx)
 		core_link_set_avmute(pipe_ctx, true);
 	}
 
-	dc->hwss.blank_stream(pipe_ctx);
 #if defined(CONFIG_DRM_AMD_DC_HDCP)
 	update_psp_stream_config(pipe_ctx, true);
 #endif
+	dc->hwss.blank_stream(pipe_ctx);
 
 	if (pipe_ctx->stream->signal == SIGNAL_TYPE_DISPLAY_PORT_MST)
 		deallocate_mst_payload(pipe_ctx);
-- 
GitLab


From efbde23a3b0164cef27fd394e7d548f46af5b51d Mon Sep 17 00:00:00 2001
From: Samson Tam <Samson.Tam@amd.com>
Date: Thu, 13 Aug 2020 10:50:21 -0400
Subject: [PATCH 0690/1341] drm/amd/display: Fix passive dongle mistaken as
 active dongle in EDID emulation

[Why]
dongle_type is set during dongle connection but for passive dongles,
dongle_type is not set. If user starts with an active dongle and
then switches to a passive dongle, it will still report as an active
dongle. Trying to emulate the wrong connecter type results in display
not lighting up.

[How]
Set dpcd_caps.dongle_type for passive dongles in detect_dp().

Signed-off-by: Samson Tam <Samson.Tam@amd.com>
Reviewed-by: Joshua Aberback <Joshua.Aberback@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 405452b736e1d..437d1a7a16fe7 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -763,6 +763,7 @@ static bool detect_dp(struct dc_link *link,
 		sink_caps->signal = dp_passive_dongle_detection(link->ddc,
 								sink_caps,
 								audio_support);
+		link->dpcd_caps.dongle_type = sink_caps->dongle_type;
 	}
 
 	return true;
-- 
GitLab


From cba4b52e431e5de3d8012281cfe194f1c39a9052 Mon Sep 17 00:00:00 2001
From: Brandon Syu <Brandon.Syu@amd.com>
Date: Wed, 10 Jun 2020 16:44:33 +0800
Subject: [PATCH 0691/1341] drm/amd/display: Keep current gain when ABM disable
 immediately

[Why]
When system enters s3/s0i3, backlight PWM would set user level.

[How]
ABM disable function add keep current gain to avoid it.

Signed-off-by: Brandon Syu <Brandon.Syu@amd.com>
Reviewed-by: Josip Pavic <Josip.Pavic@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dc_stream.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dc_stream.h b/drivers/gpu/drm/amd/display/dc/dc_stream.h
index 633442bc7ef26..d9888f316da6e 100644
--- a/drivers/gpu/drm/amd/display/dc/dc_stream.h
+++ b/drivers/gpu/drm/amd/display/dc/dc_stream.h
@@ -233,7 +233,7 @@ struct dc_stream_state {
 	union stream_update_flags update_flags;
 };
 
-#define ABM_LEVEL_IMMEDIATE_DISABLE 0xFFFFFFFF
+#define ABM_LEVEL_IMMEDIATE_DISABLE 255
 
 struct dc_stream_update {
 	struct dc_stream_state *stream;
-- 
GitLab


From 14e4f3bd818a216dc85ab5ec9a33c49357a6369b Mon Sep 17 00:00:00 2001
From: Tao Zhou <tao.zhou1@amd.com>
Date: Tue, 28 Jul 2020 12:44:59 +0800
Subject: [PATCH 0692/1341] drm/amdgpu: add asd fw check before loading asd

asd is not ready for some ASICs in early stage, and psp->asd_fw is more generic than ASIC name in the check.

Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Jiansong Chen <Jiansong.Chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 7fe564275457f..d8c6520ff74ad 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -522,8 +522,7 @@ static int psp_asd_load(struct psp_context *psp)
 	 * add workaround to bypass it for sriov now.
 	 * TODO: add version check to make it common
 	 */
-	if (amdgpu_sriov_vf(psp->adev) ||
-	    (psp->adev->asic_type == CHIP_NAVY_FLOUNDER))
+	if (amdgpu_sriov_vf(psp->adev) || !psp->asd_fw)
 		return 0;
 
 	cmd = kzalloc(sizeof(struct psp_gfx_cmd_resp), GFP_KERNEL);
-- 
GitLab


From 5de55ce951a1466e31ff68a7bc6b0a7ce3cb5947 Mon Sep 17 00:00:00 2001
From: Chuck Lever <chuck.lever@oracle.com>
Date: Mon, 17 Aug 2020 11:19:26 -0400
Subject: [PATCH 0693/1341] xprtrdma: Release in-flight MRs on disconnect

Dan Aloni reports that when a server disconnects abruptly, a few
memory regions are left DMA mapped. Over time this leak could pin
enough I/O resources to slow or even deadlock an NFS/RDMA client.

I found that if a transport disconnects before pending Send and
FastReg WRs can be posted, the to-be-registered MRs are stranded on
the req's rl_registered list and never released -- since they
weren't posted, there's no Send completion to DMA unmap them.

Reported-by: Dan Aloni <dan@kernelim.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
 net/sunrpc/xprtrdma/verbs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 75c646743df3e..ca89f24a1590b 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -933,6 +933,8 @@ static void rpcrdma_req_reset(struct rpcrdma_req *req)
 
 	rpcrdma_regbuf_dma_unmap(req->rl_sendbuf);
 	rpcrdma_regbuf_dma_unmap(req->rl_recvbuf);
+
+	frwr_reset(req);
 }
 
 /* ASSUMPTION: the rb_allreqs list is stable for the duration,
-- 
GitLab


From 28e628645333b7e581c4a7b04d958e4804ea10fe Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Tue, 25 Aug 2020 10:35:11 +0800
Subject: [PATCH 0694/1341] drm/amd/pm: correct the thermal alert temperature
 limit settings

Do the maths in celsius degree. This can fix the issues caused
by the changes below:

drm/amd/pm: correct Vega20 swctf limit setting
drm/amd/pm: correct Vega12 swctf limit setting
drm/amd/pm: correct Vega10 swctf limit setting

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 .../gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c  | 15 +++++++--------
 .../gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c  | 15 +++++++--------
 .../gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c  | 15 +++++++--------
 3 files changed, 21 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
index ce9514c881ec2..d572ba4ec9b16 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
@@ -367,14 +367,13 @@ static int vega10_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 		(struct phm_ppt_v2_information *)(hwmgr->pptable);
 	struct phm_tdp_table *tdp_table = pp_table_info->tdp_table;
 	struct amdgpu_device *adev = hwmgr->adev;
-	int low = VEGA10_THERMAL_MINIMUM_ALERT_TEMP *
-			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
-	int high = VEGA10_THERMAL_MAXIMUM_ALERT_TEMP *
-			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
+	int low = VEGA10_THERMAL_MINIMUM_ALERT_TEMP;
+	int high = VEGA10_THERMAL_MAXIMUM_ALERT_TEMP;
 	uint32_t val;
 
-	if (low < range->min)
-		low = range->min;
+	/* compare them in unit celsius degree */
+	if (low < range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES)
+		low = range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
 	if (high > tdp_table->usSoftwareShutdownTemp)
 		high = tdp_table->usSoftwareShutdownTemp;
 
@@ -385,8 +384,8 @@ static int vega10_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 
 	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, MAX_IH_CREDIT, 5);
 	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, THERM_IH_HW_ENA, 1);
-	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTH, (high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
-	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTL, (low / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
+	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTH, high);
+	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTL, low);
 	val &= (~THM_THERMAL_INT_CTRL__THERM_TRIGGER_MASK_MASK) &
 			(~THM_THERMAL_INT_CTRL__THERM_INTH_MASK_MASK) &
 			(~THM_THERMAL_INT_CTRL__THERM_INTL_MASK_MASK);
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c
index e755fc0c98860..7ace439dcde7a 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega12_thermal.c
@@ -173,14 +173,13 @@ static int vega12_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 	struct phm_ppt_v3_information *pptable_information =
 		(struct phm_ppt_v3_information *)hwmgr->pptable;
 	struct amdgpu_device *adev = hwmgr->adev;
-	int low = VEGA12_THERMAL_MINIMUM_ALERT_TEMP *
-			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
-	int high = VEGA12_THERMAL_MAXIMUM_ALERT_TEMP *
-			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
+	int low = VEGA12_THERMAL_MINIMUM_ALERT_TEMP;
+	int high = VEGA12_THERMAL_MAXIMUM_ALERT_TEMP;
 	uint32_t val;
 
-	if (low < range->min)
-		low = range->min;
+	/* compare them in unit celsius degree */
+	if (low < range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES)
+		low = range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
 	if (high > pptable_information->us_software_shutdown_temp)
 		high = pptable_information->us_software_shutdown_temp;
 
@@ -191,8 +190,8 @@ static int vega12_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 
 	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, MAX_IH_CREDIT, 5);
 	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, THERM_IH_HW_ENA, 1);
-	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTH, (high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
-	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTL, (low / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
+	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTH, high);
+	val = REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTL, low);
 	val = val & (~THM_THERMAL_INT_CTRL__THERM_TRIGGER_MASK_MASK);
 
 	WREG32_SOC15(THM, 0, mmTHM_THERMAL_INT_CTRL, val);
diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c
index a9bc9d16641a2..364162ddaa9c6 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_thermal.c
@@ -243,14 +243,13 @@ static int vega20_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 	struct phm_ppt_v3_information *pptable_information =
 		(struct phm_ppt_v3_information *)hwmgr->pptable;
 	struct amdgpu_device *adev = hwmgr->adev;
-	int low = VEGA20_THERMAL_MINIMUM_ALERT_TEMP *
-			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
-	int high = VEGA20_THERMAL_MAXIMUM_ALERT_TEMP *
-			PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
+	int low = VEGA20_THERMAL_MINIMUM_ALERT_TEMP;
+	int high = VEGA20_THERMAL_MAXIMUM_ALERT_TEMP;
 	uint32_t val;
 
-	if (low < range->min)
-		low = range->min;
+	/* compare them in unit celsius degree */
+	if (low < range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES)
+		low = range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
 	if (high > pptable_information->us_software_shutdown_temp)
 		high = pptable_information->us_software_shutdown_temp;
 
@@ -261,8 +260,8 @@ static int vega20_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 
 	val = CGS_REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, MAX_IH_CREDIT, 5);
 	val = CGS_REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, THERM_IH_HW_ENA, 1);
-	val = CGS_REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTH, (high / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
-	val = CGS_REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTL, (low / PP_TEMPERATURE_UNITS_PER_CENTIGRADES));
+	val = CGS_REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTH, high);
+	val = CGS_REG_SET_FIELD(val, THM_THERMAL_INT_CTRL, DIG_THERM_INTL, low);
 	val = val & (~THM_THERMAL_INT_CTRL__THERM_TRIGGER_MASK_MASK);
 
 	WREG32_SOC15(THM, 0, mmTHM_THERMAL_INT_CTRL, val);
-- 
GitLab


From 75947544c8abd380064c817e2a2f043914d49e55 Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Tue, 25 Aug 2020 15:39:57 +0800
Subject: [PATCH 0695/1341] drm/amdgpu: use MODE1 reset for navy_flounder by
 default

Switch default gpu reset method to MODE1 for navy_flounder.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/nv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
index da8024c2826ec..ca11253e787ca 100644
--- a/drivers/gpu/drm/amd/amdgpu/nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/nv.c
@@ -364,6 +364,7 @@ nv_asic_reset_method(struct amdgpu_device *adev)
 
 	switch (adev->asic_type) {
 	case CHIP_SIENNA_CICHLID:
+	case CHIP_NAVY_FLOUNDER:
 		return AMD_RESET_METHOD_MODE1;
 	default:
 		if (smu_baco_is_support(smu))
-- 
GitLab


From e2bf3723db563457c0abe4eaeedac25bbbbd1d76 Mon Sep 17 00:00:00 2001
From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Date: Fri, 14 Aug 2020 11:49:13 -0400
Subject: [PATCH 0696/1341] drm/amd/powerplay: Fix hardmins not being sent to
 SMU for RV

[Why]
DC uses these to raise the voltage as needed for higher dispclk/dppclk
and to ensure that we have enough bandwidth to drive the displays.

There's a bug preventing these from actuially sending messages since
it's checking the actual clock (which is 0) instead of the incoming
clock (which shouldn't be 0) when deciding to send the hardmin.

[How]
Check the clocks != 0 instead of the actual clocks.

Fixes: 9ed9203c3ee7 ("drm/amd/powerplay: rv dal-pplib interface refactor powerplay part")
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
index c9cfe90a29471..9ee8cf8267c88 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu10_hwmgr.c
@@ -204,8 +204,7 @@ static int smu10_set_min_deep_sleep_dcefclk(struct pp_hwmgr *hwmgr, uint32_t clo
 {
 	struct smu10_hwmgr *smu10_data = (struct smu10_hwmgr *)(hwmgr->backend);
 
-	if (smu10_data->need_min_deep_sleep_dcefclk &&
-		smu10_data->deep_sleep_dcefclk != clock) {
+	if (clock && smu10_data->deep_sleep_dcefclk != clock) {
 		smu10_data->deep_sleep_dcefclk = clock;
 		smum_send_msg_to_smc_with_parameter(hwmgr,
 					PPSMC_MSG_SetMinDeepSleepDcefclk,
@@ -219,8 +218,7 @@ static int smu10_set_hard_min_dcefclk_by_freq(struct pp_hwmgr *hwmgr, uint32_t c
 {
 	struct smu10_hwmgr *smu10_data = (struct smu10_hwmgr *)(hwmgr->backend);
 
-	if (smu10_data->dcf_actual_hard_min_freq &&
-		smu10_data->dcf_actual_hard_min_freq != clock) {
+	if (clock && smu10_data->dcf_actual_hard_min_freq != clock) {
 		smu10_data->dcf_actual_hard_min_freq = clock;
 		smum_send_msg_to_smc_with_parameter(hwmgr,
 					PPSMC_MSG_SetHardMinDcefclkByFreq,
@@ -234,8 +232,7 @@ static int smu10_set_hard_min_fclk_by_freq(struct pp_hwmgr *hwmgr, uint32_t cloc
 {
 	struct smu10_hwmgr *smu10_data = (struct smu10_hwmgr *)(hwmgr->backend);
 
-	if (smu10_data->f_actual_hard_min_freq &&
-		smu10_data->f_actual_hard_min_freq != clock) {
+	if (clock && smu10_data->f_actual_hard_min_freq != clock) {
 		smu10_data->f_actual_hard_min_freq = clock;
 		smum_send_msg_to_smc_with_parameter(hwmgr,
 					PPSMC_MSG_SetHardMinFclkByFreq,
-- 
GitLab


From b5b97cab55eb71daba3283c8b1d2cce456d511a1 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 25 Aug 2020 11:43:45 -0400
Subject: [PATCH 0697/1341] drm/amdgpu: Fix buffer overflow in INFO ioctl

The values for "se_num" and "sh_num" come from the user in the ioctl.
They can be in the 0-255 range but if they're more than
AMDGPU_GFX_MAX_SE (4) or AMDGPU_GFX_MAX_SH_PER_SE (2) then it results in
an out of bounds read.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index 0047da06041f2..a1706b9f64678 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -678,8 +678,12 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
 		 * in the bitfields */
 		if (se_num == AMDGPU_INFO_MMR_SE_INDEX_MASK)
 			se_num = 0xffffffff;
+		else if (se_num >= AMDGPU_GFX_MAX_SE)
+			return -EINVAL;
 		if (sh_num == AMDGPU_INFO_MMR_SH_INDEX_MASK)
 			sh_num = 0xffffffff;
+		else if (sh_num >= AMDGPU_GFX_MAX_SH_PER_SE)
+			return -EINVAL;
 
 		if (info->read_mmr_reg.count > 128)
 			return -EINVAL;
-- 
GitLab


From ef67d792a2fc578319399f605fbec2f99ecc06ea Mon Sep 17 00:00:00 2001
From: Wayne Lin <Wayne.Lin@amd.com>
Date: Tue, 18 Aug 2020 11:19:42 +0800
Subject: [PATCH 0698/1341] drm/amd/display: Retry AUX write when fail occurs

[Why]
In dm_dp_aux_transfer() now, we forget to handle AUX_WR fail cases. We
suppose every write wil get done successfully and hence some AUX
commands might not sent out indeed.

[How]
Check if AUX_WR success. If not, retry it.

Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Reviewed-by: Hersen Wu <hersenxs.wu@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index e85b58f0f4166..336aaa09be46e 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -67,7 +67,7 @@ static ssize_t dm_dp_aux_transfer(struct drm_dp_aux *aux,
 	result = dc_link_aux_transfer_raw(TO_DM_AUX(aux)->ddc_service, &payload,
 				      &operation_result);
 
-	if (payload.write)
+	if (payload.write && result >= 0)
 		result = msg->size;
 
 	if (result < 0)
-- 
GitLab


From 82dff839c9b4adad6980cc9aa6ea18c16db49013 Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Wed, 26 Aug 2020 14:11:52 +0800
Subject: [PATCH 0699/1341] drm/amdgpu: disable runtime pm for navy_flounder

Disable runtime pm for navy_flounder temporarily.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
index a1706b9f64678..414548064648e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
@@ -179,6 +179,7 @@ int amdgpu_driver_load_kms(struct drm_device *dev, unsigned long flags)
 		case CHIP_VEGA20:
 		case CHIP_ARCTURUS:
 		case CHIP_SIENNA_CICHLID:
+		case CHIP_NAVY_FLOUNDER:
 			/* enable runpm if runpm=1 */
 			if (amdgpu_runtime_pm > 0)
 				adev->runpm = true;
-- 
GitLab


From b67a468a4ccef593cd8df6a02ba3d167b77f0c81 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Wed, 26 Aug 2020 21:24:58 +0800
Subject: [PATCH 0700/1341] drm/amd/display: Fix memleak in
 amdgpu_dm_mode_config_init

When amdgpu_display_modeset_create_props() fails, state and
state->context should be freed to prevent memleak. It's the
same when amdgpu_dm_audio_init() fails.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 778edf427b94d..b51c527a3f0de 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2834,12 +2834,18 @@ static int amdgpu_dm_mode_config_init(struct amdgpu_device *adev)
 				    &dm_atomic_state_funcs);
 
 	r = amdgpu_display_modeset_create_props(adev);
-	if (r)
+	if (r) {
+		dc_release_state(state->context);
+		kfree(state);
 		return r;
+	}
 
 	r = amdgpu_dm_audio_init(adev);
-	if (r)
+	if (r) {
+		dc_release_state(state->context);
+		kfree(state);
 		return r;
+	}
 
 	return 0;
 }
-- 
GitLab


From 9c516e0e4554e8f26ab73d46cbc789d7d8db664d Mon Sep 17 00:00:00 2001
From: Brian Foster <bfoster@redhat.com>
Date: Tue, 18 Aug 2020 08:05:58 -0700
Subject: [PATCH 0701/1341] xfs: finish dfops on every insert range shift
 iteration

The recent change to make insert range an atomic operation used the
incorrect transaction rolling mechanism. The explicit transaction
roll does not finish deferred operations. This means that intents
for rmapbt updates caused by extent shifts are not logged until the
final transaction commits. Thus if a crash occurs during an insert
range, log recovery might leave the rmapbt in an inconsistent state.
This was discovered by repeated runs of generic/455.

Update insert range to finish dfops on every shift iteration. This
is similar to collapse range and ensures that intents are logged
with the transactions that make associated changes.

Fixes: dd87f87d87fa ("xfs: rework insert range into an atomic operation")
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/xfs_bmap_util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 73cafc843cd70..5123f82f24777 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1165,7 +1165,7 @@ xfs_insert_file_space(
 		goto out_trans_cancel;
 
 	do {
-		error = xfs_trans_roll_inode(&tp, ip);
+		error = xfs_defer_finish(&tp);
 		if (error)
 			goto out_trans_cancel;
 
-- 
GitLab


From 657f101930bc6c5b41bd7d6c22565c4302a80d33 Mon Sep 17 00:00:00 2001
From: Brian Foster <bfoster@redhat.com>
Date: Wed, 26 Aug 2020 14:08:27 -0700
Subject: [PATCH 0702/1341] xfs: fix off-by-one in inode alloc block
 reservation calculation

The inode chunk allocation transaction reserves inobt_maxlevels-1
blocks to accommodate a full split of the inode btree. A full split
requires an allocation for every existing level and a new root
block, which means inobt_maxlevels is the worst case block
requirement for a transaction that inserts to the inobt. This can
lead to a transaction block reservation overrun when tmpfile
creation allocates an inode chunk and expands the inobt to its
maximum depth. This problem has been observed in conjunction with
overlayfs, which makes frequent use of tmpfiles internally.

The existing reservation code goes back as far as the Linux git repo
history (v2.6.12). It was likely never observed as a problem because
the traditional file/directory creation transactions also include
worst case block reservation for directory modifications, which most
likely is able to make up for a single block deficiency in the inode
allocation portion of the calculation. tmpfile support is relatively
more recent (v3.15), less heavily used, and only includes the inode
allocation block reservation as tmpfiles aren't linked into the
directory tree on creation.

Fix up the inode alloc block reservation macro and a couple of the
block allocator minleft parameters that enforce an allocation to
leave enough free blocks in the AG for a full inobt split.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
 fs/xfs/libxfs/xfs_ialloc.c      | 4 ++--
 fs/xfs/libxfs/xfs_trans_space.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index f742a96a2fe1f..a6b37db55169c 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -688,7 +688,7 @@ xfs_ialloc_ag_alloc(
 		args.minalignslop = igeo->cluster_align - 1;
 
 		/* Allow space for the inode btree to split. */
-		args.minleft = igeo->inobt_maxlevels - 1;
+		args.minleft = igeo->inobt_maxlevels;
 		if ((error = xfs_alloc_vextent(&args)))
 			return error;
 
@@ -736,7 +736,7 @@ xfs_ialloc_ag_alloc(
 		/*
 		 * Allow space for the inode btree to split.
 		 */
-		args.minleft = igeo->inobt_maxlevels - 1;
+		args.minleft = igeo->inobt_maxlevels;
 		if ((error = xfs_alloc_vextent(&args)))
 			return error;
 	}
diff --git a/fs/xfs/libxfs/xfs_trans_space.h b/fs/xfs/libxfs/xfs_trans_space.h
index c6df01a2a1585..7ad3659c5d2a9 100644
--- a/fs/xfs/libxfs/xfs_trans_space.h
+++ b/fs/xfs/libxfs/xfs_trans_space.h
@@ -58,7 +58,7 @@
 #define	XFS_IALLOC_SPACE_RES(mp)	\
 	(M_IGEO(mp)->ialloc_blks + \
 	 ((xfs_sb_version_hasfinobt(&mp->m_sb) ? 2 : 1) * \
-	  (M_IGEO(mp)->inobt_maxlevels - 1)))
+	  M_IGEO(mp)->inobt_maxlevels))
 
 /*
  * Space reservation values for various transactions.
-- 
GitLab


From f4020438fab05364018c91f7e02ebdd192085933 Mon Sep 17 00:00:00 2001
From: Eric Sandeen <sandeen@redhat.com>
Date: Wed, 26 Aug 2020 14:11:58 -0700
Subject: [PATCH 0703/1341] xfs: fix boundary test in xfs_attr_shortform_verify

The boundary test for the fixed-offset parts of xfs_attr_sf_entry in
xfs_attr_shortform_verify is off by one, because the variable array
at the end is defined as nameval[1] not nameval[].
Hence we need to subtract 1 from the calculation.

This can be shown by:

# touch file
# setfattr -n root.a file

and verifications will fail when it's written to disk.

This only matters for a last attribute which has a single-byte name
and no value, otherwise the combination of namelen & valuelen will
push endp further out and this test won't fail.

Fixes: 1e1bbd8e7ee06 ("xfs: create structure verifier function for shortform xattrs")
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 fs/xfs/libxfs/xfs_attr_leaf.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
index 8623c815164a6..383b08f2ac61f 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -1036,8 +1036,10 @@ xfs_attr_shortform_verify(
 		 * struct xfs_attr_sf_entry has a variable length.
 		 * Check the fixed-offset parts of the structure are
 		 * within the data buffer.
+		 * xfs_attr_sf_entry is defined with a 1-byte variable
+		 * array at the end, so we must subtract that off.
 		 */
-		if (((char *)sfep + sizeof(*sfep)) >= endp)
+		if (((char *)sfep + sizeof(*sfep) - 1) >= endp)
 			return __this_address;
 
 		/* Don't allow names with known bad length. */
-- 
GitLab


From 09e31cf0c528dac3358a081dc4e773d1b3de1bc9 Mon Sep 17 00:00:00 2001
From: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Date: Tue, 25 Aug 2020 10:44:04 -0700
Subject: [PATCH 0704/1341] taprio: Fix using wrong queues in gate mask

Since commit 9c66d1564676 ("taprio: Add support for hardware
offloading") there's a bit of inconsistency when offloading schedules
to the hardware:

In software mode, the gate masks are specified in terms of traffic
classes, so if say "sched-entry S 03 20000", it means that the traffic
classes 0 and 1 are open for 20us; when taprio is offloaded to
hardware, the gate masks are specified in terms of hardware queues.

The idea here is to fix hardware offloading, so schedules in hardware
and software mode have the same behavior. What's needed to do is to
map traffic classes to queues when applying the offload to the driver.

Fixes: 9c66d1564676 ("taprio: Add support for hardware offloading")
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/sched/sch_taprio.c | 30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c
index e981992634ddf..fe53c1e38c7d6 100644
--- a/net/sched/sch_taprio.c
+++ b/net/sched/sch_taprio.c
@@ -1176,9 +1176,27 @@ static void taprio_offload_config_changed(struct taprio_sched *q)
 	spin_unlock(&q->current_entry_lock);
 }
 
-static void taprio_sched_to_offload(struct taprio_sched *q,
+static u32 tc_map_to_queue_mask(struct net_device *dev, u32 tc_mask)
+{
+	u32 i, queue_mask = 0;
+
+	for (i = 0; i < dev->num_tc; i++) {
+		u32 offset, count;
+
+		if (!(tc_mask & BIT(i)))
+			continue;
+
+		offset = dev->tc_to_txq[i].offset;
+		count = dev->tc_to_txq[i].count;
+
+		queue_mask |= GENMASK(offset + count - 1, offset);
+	}
+
+	return queue_mask;
+}
+
+static void taprio_sched_to_offload(struct net_device *dev,
 				    struct sched_gate_list *sched,
-				    const struct tc_mqprio_qopt *mqprio,
 				    struct tc_taprio_qopt_offload *offload)
 {
 	struct sched_entry *entry;
@@ -1193,7 +1211,8 @@ static void taprio_sched_to_offload(struct taprio_sched *q,
 
 		e->command = entry->command;
 		e->interval = entry->interval;
-		e->gate_mask = entry->gate_mask;
+		e->gate_mask = tc_map_to_queue_mask(dev, entry->gate_mask);
+
 		i++;
 	}
 
@@ -1201,7 +1220,6 @@ static void taprio_sched_to_offload(struct taprio_sched *q,
 }
 
 static int taprio_enable_offload(struct net_device *dev,
-				 struct tc_mqprio_qopt *mqprio,
 				 struct taprio_sched *q,
 				 struct sched_gate_list *sched,
 				 struct netlink_ext_ack *extack)
@@ -1223,7 +1241,7 @@ static int taprio_enable_offload(struct net_device *dev,
 		return -ENOMEM;
 	}
 	offload->enable = 1;
-	taprio_sched_to_offload(q, sched, mqprio, offload);
+	taprio_sched_to_offload(dev, sched, offload);
 
 	err = ops->ndo_setup_tc(dev, TC_SETUP_QDISC_TAPRIO, offload);
 	if (err < 0) {
@@ -1485,7 +1503,7 @@ static int taprio_change(struct Qdisc *sch, struct nlattr *opt,
 	}
 
 	if (FULL_OFFLOAD_IS_ENABLED(q->flags))
-		err = taprio_enable_offload(dev, mqprio, q, new_admin, extack);
+		err = taprio_enable_offload(dev, q, new_admin, extack);
 	else
 		err = taprio_disable_offload(dev, q, extack);
 	if (err)
-- 
GitLab


From 1cec170d458b1d18f6f1654ca84c0804a701c5ef Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Wed, 26 Aug 2020 01:31:05 +0200
Subject: [PATCH 0705/1341] mptcp: free acked data before waiting for more
 memory

After subflow lock is dropped, more wmem might have been made available.

This fixes a deadlock in mptcp_connect.sh 'mmap' mode: wmem is exhausted.
But as the mptcp socket holds on to already-acked data (for retransmit)
no wakeup will occur.

Using 'goto restart' calls mptcp_clean_una(sk) which will free pages
that have been acked completely in the mean time.

Fixes: fb529e62d3f3 ("mptcp: break and restart in case mptcp sndbuf is full")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/mptcp/protocol.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index 1aad411a0e461..8ccd4a151dcb7 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -892,7 +892,6 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 		goto out;
 	}
 
-wait_for_sndbuf:
 	__mptcp_flush_join_list(msk);
 	ssk = mptcp_subflow_get_send(msk);
 	while (!sk_stream_memory_free(sk) ||
@@ -982,7 +981,7 @@ static int mptcp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 				 */
 				mptcp_set_timeout(sk, ssk);
 				release_sock(ssk);
-				goto wait_for_sndbuf;
+				goto restart;
 			}
 		}
 	}
-- 
GitLab


From 35bf948f1edbf507f6e57e0879fa6ea36d2d2930 Mon Sep 17 00:00:00 2001
From: Jitao Shi <jitao.shi@mediatek.com>
Date: Mon, 17 Aug 2020 21:06:40 +0800
Subject: [PATCH 0706/1341] drm/mediatek: dsi: Fix scrolling of panel with
 small hfp or hbp

horizontal_backporch_byte should be hbp * bpp - hbp extra bytes.
So remove the wrong subtraction 10.

Fixes: 7a5bc4e22ecf ("drm/mediatek: change the dsi phytiming calculate method")
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_dsi.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index 16fd99dcdacf8..80b7a082e8740 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -466,14 +466,13 @@ static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi)
 	horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10);
 
 	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
-		horizontal_backporch_byte =
-			(vm->hback_porch * dsi_tmp_buf_bpp - 10);
+		horizontal_backporch_byte = vm->hback_porch * dsi_tmp_buf_bpp;
 	else
-		horizontal_backporch_byte = ((vm->hback_porch + vm->hsync_len) *
-			dsi_tmp_buf_bpp - 10);
+		horizontal_backporch_byte = (vm->hback_porch + vm->hsync_len) *
+					    dsi_tmp_buf_bpp;
 
 	data_phy_cycles = timing->lpx + timing->da_hs_prepare +
-			  timing->da_hs_zero + timing->da_hs_exit + 3;
+			  timing->da_hs_zero + timing->da_hs_exit;
 
 	if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) {
 		if ((vm->hfront_porch + vm->hback_porch) * dsi_tmp_buf_bpp >
-- 
GitLab


From 91244d108441013b7367b3b4dcc6869998676473 Mon Sep 17 00:00:00 2001
From: Xie He <xie.he.0141@gmail.com>
Date: Tue, 25 Aug 2020 20:03:53 -0700
Subject: [PATCH 0707/1341] drivers/net/wan/lapbether: Set network_header
 before transmitting

Set the skb's network_header before it is passed to the underlying
Ethernet device for transmission.

This patch fixes the following issue:

When we use this driver with AF_PACKET sockets, there would be error
messages of:
   protocol 0805 is buggy, dev (Ethernet interface name)
printed in the system "dmesg" log.

This is because skbs passed down to the Ethernet device for transmission
don't have their network_header properly set, and the dev_queue_xmit_nit
function in net/core/dev.c complains about this.

Reason of setting the network_header to this place (at the end of the
Ethernet header, and at the beginning of the Ethernet payload):

Because when this driver receives an skb from the Ethernet device, the
network_header is also set at this place.

Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/wan/lapbether.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index cc297ea9c6ece..e61616b0b91c7 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -210,6 +210,8 @@ static void lapbeth_data_transmit(struct net_device *ndev, struct sk_buff *skb)
 
 	skb->dev = dev = lapbeth->ethdev;
 
+	skb_reset_network_header(skb);
+
 	dev_hard_header(skb, dev, ETH_P_DEC, bcast_addr, NULL, 0);
 
 	dev_queue_xmit(skb);
-- 
GitLab


From 7f6f32bb7d3355cd78ebf1dece9a6ea7a0ca8158 Mon Sep 17 00:00:00 2001
From: Ido Schimmel <idosch@nvidia.com>
Date: Wed, 26 Aug 2020 19:48:10 +0300
Subject: [PATCH 0708/1341] ipv4: Silence suspicious RCU usage warning

fib_info_notify_update() is always called with RTNL held, but not from
an RCU read-side critical section. This leads to the following warning
[1] when the FIB table list is traversed with
hlist_for_each_entry_rcu(), but without a proper lockdep expression.

Since modification of the list is protected by RTNL, silence the warning
by adding a lockdep expression which verifies RTNL is held.

[1]
 =============================
 WARNING: suspicious RCU usage
 5.9.0-rc1-custom-14233-g2f26e122d62f #129 Not tainted
 -----------------------------
 net/ipv4/fib_trie.c:2124 RCU-list traversed in non-reader section!!

 other info that might help us debug this:

 rcu_scheduler_active = 2, debug_locks = 1
 1 lock held by ip/834:
  #0: ffffffff85a3b6b0 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x49a/0xbd0

 stack backtrace:
 CPU: 0 PID: 834 Comm: ip Not tainted 5.9.0-rc1-custom-14233-g2f26e122d62f #129
 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-2.fc32 04/01/2014
 Call Trace:
  dump_stack+0x100/0x184
  lockdep_rcu_suspicious+0x143/0x14d
  fib_info_notify_update+0x8d1/0xa60
  __nexthop_replace_notify+0xd2/0x290
  rtm_new_nexthop+0x35e2/0x5946
  rtnetlink_rcv_msg+0x4f7/0xbd0
  netlink_rcv_skb+0x17a/0x480
  rtnetlink_rcv+0x22/0x30
  netlink_unicast+0x5ae/0x890
  netlink_sendmsg+0x98a/0xf40
  ____sys_sendmsg+0x879/0xa00
  ___sys_sendmsg+0x122/0x190
  __sys_sendmsg+0x103/0x1d0
  __x64_sys_sendmsg+0x7d/0xb0
  do_syscall_64+0x32/0x50
  entry_SYSCALL_64_after_hwframe+0x44/0xa9
 RIP: 0033:0x7fde28c3be57
 Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51
c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
RSP: 002b:00007ffc09330028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fde28c3be57
RDX: 0000000000000000 RSI: 00007ffc09330090 RDI: 0000000000000003
RBP: 000000005f45f911 R08: 0000000000000001 R09: 00007ffc0933012c
R10: 0000000000000076 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc09330290 R14: 00007ffc09330eee R15: 00005610e48ed020

Fixes: 1bff1a0c9bbd ("ipv4: Add function to send route updates")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ipv4/fib_trie.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/fib_trie.c b/net/ipv4/fib_trie.c
index c89b46fec153b..ffc5332f13906 100644
--- a/net/ipv4/fib_trie.c
+++ b/net/ipv4/fib_trie.c
@@ -2121,7 +2121,8 @@ void fib_info_notify_update(struct net *net, struct nl_info *info)
 		struct hlist_head *head = &net->ipv4.fib_table_hash[h];
 		struct fib_table *tb;
 
-		hlist_for_each_entry_rcu(tb, head, tb_hlist)
+		hlist_for_each_entry_rcu(tb, head, tb_hlist,
+					 lockdep_rtnl_is_held())
 			__fib_info_notify_update(net, tb, info);
 	}
 }
-- 
GitLab


From 96e97bc07e90f175a8980a22827faf702ca4cb30 Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <kuba@kernel.org>
Date: Wed, 26 Aug 2020 12:40:06 -0700
Subject: [PATCH 0709/1341] net: disable netpoll on fresh napis

napi_disable() makes sure to set the NAPI_STATE_NPSVC bit to prevent
netpoll from accessing rings before init is complete. However, the
same is not done for fresh napi instances in netif_napi_add(),
even though we expect NAPI instances to be added as disabled.

This causes crashes during driver reconfiguration (enabling XDP,
changing the channel count) - if there is any printk() after
netif_napi_add() but before napi_enable().

To ensure memory ordering is correct we need to use RCU accessors.

Reported-by: Rob Sherwood <rsher@fb.com>
Fixes: 2d8bff12699a ("netpoll: Close race condition between poll_one_napi and napi_disable")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/core/dev.c     | 3 ++-
 net/core/netpoll.c | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index d42c9ea0c3c03..95ac7568f6932 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6612,12 +6612,13 @@ void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
 		netdev_err_once(dev, "%s() called with weight %d\n", __func__,
 				weight);
 	napi->weight = weight;
-	list_add(&napi->dev_list, &dev->napi_list);
 	napi->dev = dev;
 #ifdef CONFIG_NETPOLL
 	napi->poll_owner = -1;
 #endif
 	set_bit(NAPI_STATE_SCHED, &napi->state);
+	set_bit(NAPI_STATE_NPSVC, &napi->state);
+	list_add_rcu(&napi->dev_list, &dev->napi_list);
 	napi_hash_add(napi);
 }
 EXPORT_SYMBOL(netif_napi_add);
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 093e90e52bc25..2338753e936b7 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c
@@ -162,7 +162,7 @@ static void poll_napi(struct net_device *dev)
 	struct napi_struct *napi;
 	int cpu = smp_processor_id();
 
-	list_for_each_entry(napi, &dev->napi_list, dev_list) {
+	list_for_each_entry_rcu(napi, &dev->napi_list, dev_list) {
 		if (cmpxchg(&napi->poll_owner, -1, cpu) == -1) {
 			poll_one_napi(napi);
 			smp_store_release(&napi->poll_owner, -1);
-- 
GitLab


From 96ecdcc992eb7f468b2cf829b0f5408a1fad4668 Mon Sep 17 00:00:00 2001
From: Jakub Kicinski <kuba@kernel.org>
Date: Wed, 26 Aug 2020 12:40:07 -0700
Subject: [PATCH 0710/1341] bnxt: don't enable NAPI until rings are ready

Netpoll can try to poll napi as soon as napi_enable() is called.
It crashes trying to access a doorbell which is still NULL:

 BUG: kernel NULL pointer dereference, address: 0000000000000000
 CPU: 59 PID: 6039 Comm: ethtool Kdump: loaded Tainted: G S                5.9.0-rc1-00469-g5fd99b5d9950-dirty #26
 RIP: 0010:bnxt_poll+0x121/0x1c0
 Code: c4 20 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 41 8b 86 a0 01 00 00 41 23 85 18 01 00 00 49 8b 96 a8 01 00 00 0d 00 00 00 24 <89> 02
41 f6 45 77 02 74 cb 49 8b ae d8 01 00 00 31 c0 c7 44 24 1a
  netpoll_poll_dev+0xbd/0x1a0
  __netpoll_send_skb+0x1b2/0x210
  netpoll_send_udp+0x2c9/0x406
  write_ext_msg+0x1d7/0x1f0
  console_unlock+0x23c/0x520
  vprintk_emit+0xe0/0x1d0
  printk+0x58/0x6f
  x86_vector_activate.cold+0xf/0x46
  __irq_domain_activate_irq+0x50/0x80
  __irq_domain_activate_irq+0x32/0x80
  __irq_domain_activate_irq+0x32/0x80
  irq_domain_activate_irq+0x25/0x40
  __setup_irq+0x2d2/0x700
  request_threaded_irq+0xfb/0x160
  __bnxt_open_nic+0x3b1/0x750
  bnxt_open_nic+0x19/0x30
  ethtool_set_channels+0x1ac/0x220
  dev_ethtool+0x11ba/0x2240
  dev_ioctl+0x1cf/0x390
  sock_do_ioctl+0x95/0x130

Reported-by: Rob Sherwood <rsher@fb.com>
Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 316227136f5b3..57d0e195cddf6 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -9504,15 +9504,15 @@ static int __bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
 		}
 	}
 
-	bnxt_enable_napi(bp);
-	bnxt_debug_dev_init(bp);
-
 	rc = bnxt_init_nic(bp, irq_re_init);
 	if (rc) {
 		netdev_err(bp->dev, "bnxt_init_nic err: %x\n", rc);
-		goto open_err;
+		goto open_err_irq;
 	}
 
+	bnxt_enable_napi(bp);
+	bnxt_debug_dev_init(bp);
+
 	if (link_re_init) {
 		mutex_lock(&bp->link_lock);
 		rc = bnxt_update_phy_setting(bp);
@@ -9543,10 +9543,6 @@ static int __bnxt_open_nic(struct bnxt *bp, bool irq_re_init, bool link_re_init)
 		bnxt_vf_reps_open(bp);
 	return 0;
 
-open_err:
-	bnxt_debug_dev_exit(bp);
-	bnxt_disable_napi(bp);
-
 open_err_irq:
 	bnxt_del_napi(bp);
 
-- 
GitLab


From 3d7a9520f0c3e6a68b6de8c5812fc8b6d7a52626 Mon Sep 17 00:00:00 2001
From: Olga Kornievskaia <kolga@netapp.com>
Date: Thu, 20 Aug 2020 18:52:43 -0400
Subject: [PATCH 0711/1341] NFSv4.1 handle ERR_DELAY error reclaiming locking
 state on delegation recall

A client should be able to handle getting an ERR_DELAY error
while doing a LOCK call to reclaim state due to delegation being
recalled. This is a transient error that can happen due to server
moving its volumes and invalidating its file location cache and
upon reference to it during the LOCK call needing to do an
expensive lookup (leading to an ERR_DELAY error on a PUTFH).

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/nfs4proc.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index dbd01548335b2..4a6cfb497103a 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7298,7 +7298,12 @@ int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state,
 	err = nfs4_set_lock_state(state, fl);
 	if (err != 0)
 		return err;
-	err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
+	do {
+		err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
+		if (err != -NFS4ERR_DELAY)
+			break;
+		ssleep(1);
+	} while (err == -NFS4ERR_DELAY);
 	return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err);
 }
 
-- 
GitLab


From 56450c20fe10d4d93f58019109aa4e06fc0b9206 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Wed, 26 Aug 2020 18:58:26 -0600
Subject: [PATCH 0712/1341] io_uring: clear req->result on IOPOLL re-issue

Make sure we clear req->result, which was set to -EAGAIN for retry
purposes, when moving it to the reissue list. Otherwise we can end up
retrying a request more than once, which leads to weird results in
the io-wq handling (and other spots).

Cc: stable@vger.kernel.org
Reported-by: Andres Freund <andres@anarazel.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index bd2d8de3f2e8f..6df08287c59e1 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2049,6 +2049,7 @@ static void io_iopoll_complete(struct io_ring_ctx *ctx, unsigned int *nr_events,
 
 		req = list_first_entry(done, struct io_kiocb, inflight_entry);
 		if (READ_ONCE(req->result) == -EAGAIN) {
+			req->result = 0;
 			req->iopoll_completed = 0;
 			list_move_tail(&req->inflight_entry, &again);
 			continue;
-- 
GitLab


From c330fb1ddc0a922f044989492b7fcca77ee1db46 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 25 Aug 2020 17:22:58 +0200
Subject: [PATCH 0713/1341] XEN uses irqdesc::irq_data_common::handler_data to
 store a per interrupt XEN data pointer which contains XEN specific
 information.

handler data is meant for interrupt handlers and not for storing irq chip
specific information as some devices require handler data to store internal
per interrupt information, e.g. pinctrl/GPIO chained interrupt handlers.

This obviously creates a conflict of interests and crashes the machine
because the XEN pointer is overwritten by the driver pointer.

As the XEN data is not handler specific it should be stored in
irqdesc::irq_data::chip_data instead.

A simple sed s/irq_[sg]et_handler_data/irq_[sg]et_chip_data/ cures that.

Cc: stable@vger.kernel.org
Reported-by: Roman Shaposhnik <roman@zededa.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Roman Shaposhnik <roman@zededa.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/87lfi2yckt.fsf@nanos.tec.linutronix.de
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 drivers/xen/events/events_base.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 140c7bf33a989..90b8f56fbadb1 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/xen/events/events_base.c
@@ -156,7 +156,7 @@ int get_evtchn_to_irq(evtchn_port_t evtchn)
 /* Get info for IRQ */
 struct irq_info *info_for_irq(unsigned irq)
 {
-	return irq_get_handler_data(irq);
+	return irq_get_chip_data(irq);
 }
 
 /* Constructors for packed IRQ information. */
@@ -377,7 +377,7 @@ static void xen_irq_init(unsigned irq)
 	info->type = IRQT_UNBOUND;
 	info->refcnt = -1;
 
-	irq_set_handler_data(irq, info);
+	irq_set_chip_data(irq, info);
 
 	list_add_tail(&info->list, &xen_irq_list_head);
 }
@@ -426,14 +426,14 @@ static int __must_check xen_allocate_irq_gsi(unsigned gsi)
 
 static void xen_free_irq(unsigned irq)
 {
-	struct irq_info *info = irq_get_handler_data(irq);
+	struct irq_info *info = irq_get_chip_data(irq);
 
 	if (WARN_ON(!info))
 		return;
 
 	list_del(&info->list);
 
-	irq_set_handler_data(irq, NULL);
+	irq_set_chip_data(irq, NULL);
 
 	WARN_ON(info->refcnt > 0);
 
@@ -603,7 +603,7 @@ EXPORT_SYMBOL_GPL(xen_irq_from_gsi);
 static void __unbind_from_irq(unsigned int irq)
 {
 	evtchn_port_t evtchn = evtchn_from_irq(irq);
-	struct irq_info *info = irq_get_handler_data(irq);
+	struct irq_info *info = irq_get_chip_data(irq);
 
 	if (info->refcnt > 0) {
 		info->refcnt--;
@@ -1108,7 +1108,7 @@ int bind_ipi_to_irqhandler(enum ipi_vector ipi,
 
 void unbind_from_irqhandler(unsigned int irq, void *dev_id)
 {
-	struct irq_info *info = irq_get_handler_data(irq);
+	struct irq_info *info = irq_get_chip_data(irq);
 
 	if (WARN_ON(!info))
 		return;
@@ -1142,7 +1142,7 @@ int evtchn_make_refcounted(evtchn_port_t evtchn)
 	if (irq == -1)
 		return -ENOENT;
 
-	info = irq_get_handler_data(irq);
+	info = irq_get_chip_data(irq);
 
 	if (!info)
 		return -ENOENT;
@@ -1170,7 +1170,7 @@ int evtchn_get(evtchn_port_t evtchn)
 	if (irq == -1)
 		goto done;
 
-	info = irq_get_handler_data(irq);
+	info = irq_get_chip_data(irq);
 
 	if (!info)
 		goto done;
-- 
GitLab


From d742db70033c745e410523e00522ee0cfe2aa416 Mon Sep 17 00:00:00 2001
From: Simon Leiner <simon@leiner.me>
Date: Tue, 25 Aug 2020 11:31:52 +0200
Subject: [PATCH 0714/1341] xen/xenbus: Fix granting of vmalloc'd memory

On some architectures (like ARM), virt_to_gfn cannot be used for
vmalloc'd memory because of its reliance on virt_to_phys. This patch
introduces a check for vmalloc'd addresses and obtains the PFN using
vmalloc_to_pfn in that case.

Signed-off-by: Simon Leiner <simon@leiner.me>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/20200825093153.35500-1-simon@leiner.me
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 drivers/xen/xenbus/xenbus_client.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index 786fbb7d8be06..907bcbb93afbf 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -379,8 +379,14 @@ int xenbus_grant_ring(struct xenbus_device *dev, void *vaddr,
 	int i, j;
 
 	for (i = 0; i < nr_pages; i++) {
-		err = gnttab_grant_foreign_access(dev->otherend_id,
-						  virt_to_gfn(vaddr), 0);
+		unsigned long gfn;
+
+		if (is_vmalloc_addr(vaddr))
+			gfn = pfn_to_gfn(vmalloc_to_pfn(vaddr));
+		else
+			gfn = virt_to_gfn(vaddr);
+
+		err = gnttab_grant_foreign_access(dev->otherend_id, gfn, 0);
 		if (err < 0) {
 			xenbus_dev_fatal(dev, err,
 					 "granting access to ring page");
-- 
GitLab


From 9d3004bf7ba32c89873bb8422671d52b4bb52ce1 Mon Sep 17 00:00:00 2001
From: Simon Leiner <simon@leiner.me>
Date: Tue, 25 Aug 2020 11:31:53 +0200
Subject: [PATCH 0715/1341] arm/xen: Add misuse warning to virt_to_gfn

As virt_to_gfn uses virt_to_phys, it will return invalid addresses when
used with vmalloc'd addresses. This patch introduces a warning, when
virt_to_gfn is used in this way.

Signed-off-by: Simon Leiner <simon@leiner.me>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/20200825093153.35500-2-simon@leiner.me
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 include/xen/arm/page.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/include/xen/arm/page.h b/include/xen/arm/page.h
index d7f6af50e200b..39df751d0dc43 100644
--- a/include/xen/arm/page.h
+++ b/include/xen/arm/page.h
@@ -76,7 +76,11 @@ static inline unsigned long bfn_to_pfn(unsigned long bfn)
 #define bfn_to_local_pfn(bfn)	bfn_to_pfn(bfn)
 
 /* VIRT <-> GUEST conversion */
-#define virt_to_gfn(v)		(pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT))
+#define virt_to_gfn(v)                                                         \
+	({                                                                     \
+		WARN_ON_ONCE(!virt_addr_valid(v));                              \
+		pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT);                 \
+	})
 #define gfn_to_virt(m)		(__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT))
 
 /* Only used in PV code. But ARM guests are always HVM. */
-- 
GitLab


From 892fc9f6835ecf075efac20789b012c5c9997fcc Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 26 Aug 2020 14:33:30 +0300
Subject: [PATCH 0716/1341] dma-pool: Fix an uninitialized variable bug in
 atomic_pool_expand()

The "page" pointer can be used with out being initialized.

Fixes: d7e673ec2c8e ("dma-pool: Only allocate from CMA when in same memory zone")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 kernel/dma/pool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/dma/pool.c b/kernel/dma/pool.c
index 06582b488e317..1281c0f0442bc 100644
--- a/kernel/dma/pool.c
+++ b/kernel/dma/pool.c
@@ -84,7 +84,7 @@ static int atomic_pool_expand(struct gen_pool *pool, size_t pool_size,
 			      gfp_t gfp)
 {
 	unsigned int order;
-	struct page *page;
+	struct page *page = NULL;
 	void *addr;
 	int ret = -ENOMEM;
 
-- 
GitLab


From 068834a2773b6a12805105cfadbb3d4229fc6e0a Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@rowland.harvard.edu>
Date: Wed, 26 Aug 2020 15:46:24 -0400
Subject: [PATCH 0717/1341] USB: quirks: Ignore duplicate endpoint on Sound
 Devices MixPre-D

The Sound Devices MixPre-D audio card suffers from the same defect
as the Sound Devices USBPre2: an endpoint shared between a normal
audio interface and a vendor-specific interface, in violation of the
USB spec.  Since the USB core now treats duplicated endpoints as bugs
and ignores them, the audio endpoint isn't available and the card
can't be used for audio capture.

Along the same lines as commit bdd1b147b802 ("USB: quirks: blacklist
duplicate ep on Sound Devices USBPre2"), this patch adds a quirks
entry saying to ignore ep5in for interface 1, leaving it available for
use with standard audio interface 2.

Reported-and-tested-by: Jean-Christophe Barnoud <jcbarnoud@gmail.com>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Fixes: 3e4f8e21c4f2 ("USB: core: fix check for duplicate endpoints")
Link: https://lore.kernel.org/r/20200826194624.GA412633@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/quirks.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index d1f38956b210e..f232914de5fd4 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -370,6 +370,10 @@ static const struct usb_device_id usb_quirk_list[] = {
 	{ USB_DEVICE(0x0926, 0x0202), .driver_info =
 			USB_QUIRK_ENDPOINT_IGNORE },
 
+	/* Sound Devices MixPre-D */
+	{ USB_DEVICE(0x0926, 0x0208), .driver_info =
+			USB_QUIRK_ENDPOINT_IGNORE },
+
 	/* Keytouch QWERTY Panel keyboard */
 	{ USB_DEVICE(0x0926, 0x3333), .driver_info =
 			USB_QUIRK_CONFIG_INTF_STRINGS },
@@ -511,6 +515,7 @@ static const struct usb_device_id usb_amd_resume_quirk_list[] = {
  */
 static const struct usb_device_id usb_endpoint_ignore[] = {
 	{ USB_DEVICE_INTERFACE_NUMBER(0x0926, 0x0202, 1), .driver_info = 0x85 },
+	{ USB_DEVICE_INTERFACE_NUMBER(0x0926, 0x0208, 1), .driver_info = 0x85 },
 	{ }
 };
 
-- 
GitLab


From bfd08d06d978d0304eb6f7855b548aa2cd1c5486 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Wed, 26 Aug 2020 22:21:19 +0300
Subject: [PATCH 0718/1341] USB: gadget: u_f: Unbreak offset calculation in
 VLAs

Inadvertently the commit b1cd1b65afba ("USB: gadget: u_f: add overflow checks
to VLA macros") makes VLA macros to always return 0 due to different scope of
two variables of the same name. Obviously we need to have only one.

Fixes: b1cd1b65afba ("USB: gadget: u_f: add overflow checks to VLA macros")
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Brooke Basile <brookebasile@gmail.com>
Cc: stable <stable@kernel.org>
Link: https://lore.kernel.org/r/20200826192119.56450-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/gadget/u_f.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/gadget/u_f.h b/drivers/usb/gadget/u_f.h
index df4e1dcb357df..e313c3b8dcb19 100644
--- a/drivers/usb/gadget/u_f.h
+++ b/drivers/usb/gadget/u_f.h
@@ -25,9 +25,9 @@
 		size_t offset = 0;					       \
 		if (groupname##__next != SIZE_MAX) {			       \
 			size_t align_mask = __alignof__(type) - 1;	       \
-			size_t offset = (groupname##__next + align_mask)       \
-					 & ~align_mask;			       \
 			size_t size = array_size(n, sizeof(type));	       \
+			offset = (groupname##__next + align_mask) &	       \
+				  ~align_mask;				       \
 			if (check_add_overflow(offset, size,		       \
 					       &groupname##__next)) {          \
 				groupname##__next = SIZE_MAX;		       \
@@ -43,8 +43,8 @@
 		size_t offset = 0;						\
 		if (groupname##__next != SIZE_MAX) {				\
 			size_t align_mask = __alignof__(type) - 1;		\
-			size_t offset = (groupname##__next + align_mask)	\
-					 & ~align_mask;				\
+			offset = (groupname##__next + align_mask) &		\
+				  ~align_mask;					\
 			if (check_add_overflow(offset, groupname##_##name##__sz,\
 							&groupname##__next)) {	\
 				groupname##__next = SIZE_MAX;			\
-- 
GitLab


From 1d4169834628d18b2392a2da92b7fbf5e8e2ce89 Mon Sep 17 00:00:00 2001
From: Tang Bin <tangbin@cmss.chinamobile.com>
Date: Wed, 26 Aug 2020 22:49:31 +0800
Subject: [PATCH 0719/1341] usb: host: ohci-exynos: Fix error handling in
 exynos_ohci_probe()

If the function platform_get_irq() failed, the negative value
returned will not be detected here. So fix error handling in
exynos_ohci_probe(). And when get irq failed, the function
platform_get_irq() logs an error message, so remove redundant
message here.

Fixes: 62194244cf87 ("USB: Add Samsung Exynos OHCI diver")
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200826144931.1828-1-tangbin@cmss.chinamobile.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/ohci-exynos.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/host/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index bd40e597f2566..5f5e8a64c8e2e 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -171,9 +171,8 @@ static int exynos_ohci_probe(struct platform_device *pdev)
 	hcd->rsrc_len = resource_size(res);
 
 	irq = platform_get_irq(pdev, 0);
-	if (!irq) {
-		dev_err(&pdev->dev, "Failed to get IRQ\n");
-		err = -ENODEV;
+	if (irq < 0) {
+		err = irq;
 		goto fail_io;
 	}
 
-- 
GitLab


From 9aa37788e7ebb3f489fb4b71ce07adadd444264a Mon Sep 17 00:00:00 2001
From: Cyril Roelandt <tipecaml@gmail.com>
Date: Tue, 25 Aug 2020 23:22:31 +0200
Subject: [PATCH 0720/1341] USB: Ignore UAS for JMicron JMS567 ATA/ATAPI Bridge

This device does not support UAS properly and a similar entry already
exists in drivers/usb/storage/unusual_uas.h. Without this patch,
storage_probe() defers the handling of this device to UAS, which cannot
handle it either.

Tested-by: Brice Goglin <brice.goglin@gmail.com>
Fixes: bc3bdb12bbb3 ("usb-storage: Disable UAS on JMicron SATA enclosure")
Acked-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Signed-off-by: Cyril Roelandt <tipecaml@gmail.com>
Link: https://lore.kernel.org/r/20200825212231.46309-1-tipecaml@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/storage/unusual_devs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/storage/unusual_devs.h b/drivers/usb/storage/unusual_devs.h
index 220ae2c356eee..5732e9691f08f 100644
--- a/drivers/usb/storage/unusual_devs.h
+++ b/drivers/usb/storage/unusual_devs.h
@@ -2328,7 +2328,7 @@ UNUSUAL_DEV(  0x357d, 0x7788, 0x0114, 0x0114,
 		"JMicron",
 		"USB to ATA/ATAPI Bridge",
 		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
-		US_FL_BROKEN_FUA ),
+		US_FL_BROKEN_FUA | US_FL_IGNORE_UAS ),
 
 /* Reported by Andrey Rahmatullin <wrar@altlinux.org> */
 UNUSUAL_DEV(  0x4102, 0x1020, 0x0100,  0x0100,
-- 
GitLab


From 52d6b926aabc47643cd910c85edb262b7f44c168 Mon Sep 17 00:00:00 2001
From: Ashok Raj <ashok.raj@intel.com>
Date: Wed, 26 Aug 2020 21:12:10 -0700
Subject: [PATCH 0721/1341] x86/hotplug: Silence APIC only after all interrupts
 are migrated

There is a race when taking a CPU offline. Current code looks like this:

native_cpu_disable()
{
	...
	apic_soft_disable();
	/*
	 * Any existing set bits for pending interrupt to
	 * this CPU are preserved and will be sent via IPI
	 * to another CPU by fixup_irqs().
	 */
	cpu_disable_common();
	{
		....
		/*
		 * Race window happens here. Once local APIC has been
		 * disabled any new interrupts from the device to
		 * the old CPU are lost
		 */
		fixup_irqs(); // Too late to capture anything in IRR.
		...
	}
}

The fix is to disable the APIC *after* cpu_disable_common().

Testing was done with a USB NIC that provided a source of frequent
interrupts. A script migrated interrupts to a specific CPU and
then took that CPU offline.

Fixes: 60dcaad5736f ("x86/hotplug: Silence APIC and NMI when CPU is dead")
Reported-by: Evan Green <evgreen@chromium.org>
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Tested-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Evan Green <evgreen@chromium.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/lkml/875zdarr4h.fsf@nanos.tec.linutronix.de/
Link: https://lore.kernel.org/r/1598501530-45821-1-git-send-email-ashok.raj@intel.com
---
 arch/x86/kernel/smpboot.c | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 27aa04a957021..f5ef689dd62ad 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1594,14 +1594,28 @@ int native_cpu_disable(void)
 	if (ret)
 		return ret;
 
-	/*
-	 * Disable the local APIC. Otherwise IPI broadcasts will reach
-	 * it. It still responds normally to INIT, NMI, SMI, and SIPI
-	 * messages.
-	 */
-	apic_soft_disable();
 	cpu_disable_common();
 
+        /*
+         * Disable the local APIC. Otherwise IPI broadcasts will reach
+         * it. It still responds normally to INIT, NMI, SMI, and SIPI
+         * messages.
+         *
+         * Disabling the APIC must happen after cpu_disable_common()
+         * which invokes fixup_irqs().
+         *
+         * Disabling the APIC preserves already set bits in IRR, but
+         * an interrupt arriving after disabling the local APIC does not
+         * set the corresponding IRR bit.
+         *
+         * fixup_irqs() scans IRR for set bits so it can raise a not
+         * yet handled interrupt on the new destination CPU via an IPI
+         * but obviously it can't do so for IRR bits which are not set.
+         * IOW, interrupts arriving after disabling the local APIC will
+         * be lost.
+         */
+	apic_soft_disable();
+
 	return 0;
 }
 
-- 
GitLab


From e027fffff799cdd70400c5485b1a54f482255985 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 26 Aug 2020 22:21:44 +0200
Subject: [PATCH 0722/1341] x86/irq: Unbreak interrupt affinity setting

Several people reported that 5.8 broke the interrupt affinity setting
mechanism.

The consolidation of the entry code reused the regular exception entry code
for device interrupts and changed the way how the vector number is conveyed
from ptregs->orig_ax to a function argument.

The low level entry uses the hardware error code slot to push the vector
number onto the stack which is retrieved from there into a function
argument and the slot on stack is set to -1.

The reason for setting it to -1 is that the error code slot is at the
position where pt_regs::orig_ax is. A positive value in pt_regs::orig_ax
indicates that the entry came via a syscall. If it's not set to a negative
value then a signal delivery on return to userspace would try to restart a
syscall. But there are other places which rely on pt_regs::orig_ax being a
valid indicator for syscall entry.

But setting pt_regs::orig_ax to -1 has a nasty side effect vs. the
interrupt affinity setting mechanism, which was overlooked when this change
was made.

Moving interrupts on x86 happens in several steps. A new vector on a
different CPU is allocated and the relevant interrupt source is
reprogrammed to that. But that's racy and there might be an interrupt
already in flight to the old vector. So the old vector is preserved until
the first interrupt arrives on the new vector and the new target CPU. Once
that happens the old vector is cleaned up, but this cleanup still depends
on the vector number being stored in pt_regs::orig_ax, which is now -1.

That -1 makes the check for cleanup: pt_regs::orig_ax == new_vector
always false. As a consequence the interrupt is moved once, but then it
cannot be moved anymore because the cleanup of the old vector never
happens.

There would be several ways to convey the vector information to that place
in the guts of the interrupt handling, but on deeper inspection it turned
out that this check is pointless and a leftover from the old affinity model
of X86 which supported multi-CPU affinities. Under this model it was
possible that an interrupt had an old and a new vector on the same CPU, so
the vector match was required.

Under the new model the effective affinity of an interrupt is always a
single CPU from the requested affinity mask. If the affinity mask changes
then either the interrupt stays on the CPU and on the same vector when that
CPU is still in the new affinity mask or it is moved to a different CPU, but
it is never moved to a different vector on the same CPU.

Ergo the cleanup check for the matching vector number is not required and
can be removed which makes the dependency on pt_regs:orig_ax go away.

The remaining check for new_cpu == smp_processsor_id() is completely
sufficient. If it matches then the interrupt was successfully migrated and
the cleanup can proceed.

For paranoia sake add a warning into the vector assignment code to
validate that the assumption of never moving to a different vector on
the same CPU holds.

Fixes: 633260fa143 ("x86/irq: Convey vector as argument and not in ptregs")
Reported-by: Alex bykov <alex.bykov@scylladb.com>
Reported-by: Avi Kivity <avi@scylladb.com>
Reported-by: Alexander Graf <graf@amazon.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Alexander Graf <graf@amazon.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/87wo1ltaxz.fsf@nanos.tec.linutronix.de
---
 arch/x86/kernel/apic/vector.c | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index dae32d948bf25..f8a56b5dc29fe 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -161,6 +161,7 @@ static void apic_update_vector(struct irq_data *irqd, unsigned int newvec,
 		apicd->move_in_progress = true;
 		apicd->prev_vector = apicd->vector;
 		apicd->prev_cpu = apicd->cpu;
+		WARN_ON_ONCE(apicd->cpu == newcpu);
 	} else {
 		irq_matrix_free(vector_matrix, apicd->cpu, apicd->vector,
 				managed);
@@ -910,7 +911,7 @@ void send_cleanup_vector(struct irq_cfg *cfg)
 		__send_cleanup_vector(apicd);
 }
 
-static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector)
+void irq_complete_move(struct irq_cfg *cfg)
 {
 	struct apic_chip_data *apicd;
 
@@ -918,15 +919,16 @@ static void __irq_complete_move(struct irq_cfg *cfg, unsigned vector)
 	if (likely(!apicd->move_in_progress))
 		return;
 
-	if (vector == apicd->vector && apicd->cpu == smp_processor_id())
+	/*
+	 * If the interrupt arrived on the new target CPU, cleanup the
+	 * vector on the old target CPU. A vector check is not required
+	 * because an interrupt can never move from one vector to another
+	 * on the same CPU.
+	 */
+	if (apicd->cpu == smp_processor_id())
 		__send_cleanup_vector(apicd);
 }
 
-void irq_complete_move(struct irq_cfg *cfg)
-{
-	__irq_complete_move(cfg, ~get_irq_regs()->orig_ax);
-}
-
 /*
  * Called from fixup_irqs() with @desc->lock held and interrupts disabled.
  */
-- 
GitLab


From 2e7c8fb8942773f412fe12f3b63e8bb92c18ab3f Mon Sep 17 00:00:00 2001
From: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Date: Wed, 12 Aug 2020 12:30:33 +0200
Subject: [PATCH 0723/1341] media: vicodec: add missing
 v4l2_ctrl_request_hdl_put()

The check for a required control in the request was missing a call to
v4l2_ctrl_request_hdl_put(), so the control request object was never
released.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Fixes: 997deb811bf5 ("media: vicodec: Add support for stateless decoder.")
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/test-drivers/vicodec/vicodec-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/test-drivers/vicodec/vicodec-core.c b/drivers/media/test-drivers/vicodec/vicodec-core.c
index 8941d73f6611d..71928e30dae80 100644
--- a/drivers/media/test-drivers/vicodec/vicodec-core.c
+++ b/drivers/media/test-drivers/vicodec/vicodec-core.c
@@ -1994,6 +1994,7 @@ static int vicodec_request_validate(struct media_request *req)
 	}
 	ctrl = v4l2_ctrl_request_hdl_ctrl_find(hdl,
 					       vicodec_ctrl_stateless_state.id);
+	v4l2_ctrl_request_hdl_put(hdl);
 	if (!ctrl) {
 		v4l2_info(&ctx->dev->v4l2_dev,
 			  "Missing required codec control\n");
-- 
GitLab


From b30063976f29fc221a99d18d37d22ca035068aa9 Mon Sep 17 00:00:00 2001
From: Ezequiel Garcia <ezequiel@collabora.com>
Date: Thu, 13 Aug 2020 21:18:33 +0200
Subject: [PATCH 0724/1341] media: cedrus: Add missing
 v4l2_ctrl_request_hdl_put()

The check for a required control in the request was missing a call to
v4l2_ctrl_request_hdl_put() in the error path. Fix it.

Fixes: 50e761516f2b8c ("media: platform: Add Cedrus VPU decoder driver")
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/staging/media/sunxi/cedrus/cedrus.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
index bc27f9430eeb1..7c6b91f0e780a 100644
--- a/drivers/staging/media/sunxi/cedrus/cedrus.c
+++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
@@ -199,6 +199,7 @@ static int cedrus_request_validate(struct media_request *req)
 	struct v4l2_ctrl *ctrl_test;
 	unsigned int count;
 	unsigned int i;
+	int ret = 0;
 
 	list_for_each_entry(obj, &req->objects, list) {
 		struct vb2_buffer *vb;
@@ -243,12 +244,16 @@ static int cedrus_request_validate(struct media_request *req)
 		if (!ctrl_test) {
 			v4l2_info(&ctx->dev->v4l2_dev,
 				  "Missing required codec control\n");
-			return -ENOENT;
+			ret = -ENOENT;
+			break;
 		}
 	}
 
 	v4l2_ctrl_request_hdl_put(hdl);
 
+	if (ret)
+		return ret;
+
 	return vb2_request_validate(req);
 }
 
-- 
GitLab


From 4d618b9f3fcab84e9ec28c180de46fb2c929d096 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <mpe@ellerman.id.au>
Date: Fri, 21 Aug 2020 20:49:10 +1000
Subject: [PATCH 0725/1341] video: fbdev: controlfb: Fix build for
 COMPILE_TEST=y && PPC_PMAC=n
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The build is currently broken, if COMPILE_TEST=y and PPC_PMAC=n:

  linux/drivers/video/fbdev/controlfb.c: In function ‘control_set_hardware’:
  linux/drivers/video/fbdev/controlfb.c:276:2: error: implicit declaration of function ‘btext_update_display’
    276 |  btext_update_display(p->frame_buffer_phys + CTRLFB_OFF,
        |  ^~~~~~~~~~~~~~~~~~~~

Fix it by including btext.h whenever CONFIG_BOOTX_TEXT is enabled.

Fixes: a07a63b0e24d ("video: fbdev: controlfb: add COMPILE_TEST support")
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Link: https://lore.kernel.org/r/20200821104910.3363818-1-mpe@ellerman.id.au
---
 drivers/video/fbdev/controlfb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/video/fbdev/controlfb.c b/drivers/video/fbdev/controlfb.c
index 9c4f1be856eca..547abeb39f87a 100644
--- a/drivers/video/fbdev/controlfb.c
+++ b/drivers/video/fbdev/controlfb.c
@@ -49,6 +49,8 @@
 #include <linux/cuda.h>
 #ifdef CONFIG_PPC_PMAC
 #include <asm/prom.h>
+#endif
+#ifdef CONFIG_BOOTX_TEXT
 #include <asm/btext.h>
 #endif
 
-- 
GitLab


From aa661d7fab436d8a782618b3138da1a84ca28a31 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Sun, 23 Aug 2020 17:31:16 -0700
Subject: [PATCH 0726/1341] Documentation/powerpc: fix malformed table in
 syscall64-abi

Fix malformed table warning in powerpc/syscall64-abi.rst by making
two tables and moving the headings.

Documentation/powerpc/syscall64-abi.rst:53: WARNING: Malformed table.
Text in column margin in table line 2.

  =========== ============= ========================================
  --- For the sc instruction, differences with the ELF ABI ---
  r0          Volatile      (System call number.)
  r3          Volatile      (Parameter 1, and return value.)
  r4-r8       Volatile      (Parameters 2-6.)
  cr0         Volatile      (cr0.SO is the return error condition.)
  cr1, cr5-7  Nonvolatile
  lr          Nonvolatile

  --- For the scv 0 instruction, differences with the ELF ABI ---
  r0          Volatile      (System call number.)
  r3          Volatile      (Parameter 1, and return value.)
  r4-r8       Volatile      (Parameters 2-6.)
  =========== ============= ========================================

Fixes: 7fa95f9adaee ("powerpc/64s: system call support for scv/rfscv instructions")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/e06de4d3-a36f-2745-9775-467e125436cc@infradead.org
---
 Documentation/powerpc/syscall64-abi.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/powerpc/syscall64-abi.rst b/Documentation/powerpc/syscall64-abi.rst
index 46caaadbb0290..379817ca64d2b 100644
--- a/Documentation/powerpc/syscall64-abi.rst
+++ b/Documentation/powerpc/syscall64-abi.rst
@@ -49,16 +49,18 @@ Register preservation rules
 Register preservation rules match the ELF ABI calling sequence with the
 following differences:
 
-=========== ============= ========================================
 --- For the sc instruction, differences with the ELF ABI ---
+=========== ============= ========================================
 r0          Volatile      (System call number.)
 r3          Volatile      (Parameter 1, and return value.)
 r4-r8       Volatile      (Parameters 2-6.)
 cr0         Volatile      (cr0.SO is the return error condition.)
 cr1, cr5-7  Nonvolatile
 lr          Nonvolatile
+=========== ============= ========================================
 
 --- For the scv 0 instruction, differences with the ELF ABI ---
+=========== ============= ========================================
 r0          Volatile      (System call number.)
 r3          Volatile      (Parameter 1, and return value.)
 r4-r8       Volatile      (Parameters 2-6.)
-- 
GitLab


From e5fe56092e753c50093c60e757561984abff335e Mon Sep 17 00:00:00 2001
From: Nicholas Piggin <npiggin@gmail.com>
Date: Tue, 25 Aug 2020 17:53:09 +1000
Subject: [PATCH 0727/1341] powerpc/64s: scv entry should set PPR

Kernel entry sets PPR to HMT_MEDIUM by convention. The scv entry
path missed this.

Fixes: 7fa95f9adaee ("powerpc/64s: system call support for scv/rfscv instructions")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200825075309.224184-1-npiggin@gmail.com
---
 arch/powerpc/kernel/entry_64.S | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 33a42e42c56f6..733e40eba4ebe 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -113,6 +113,10 @@ END_FTR_SECTION_IFSET(CPU_FTR_TM)
 	ld	r11,exception_marker@toc(r2)
 	std	r11,-16(r10)		/* "regshere" marker */
 
+BEGIN_FTR_SECTION
+	HMT_MEDIUM
+END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
+
 	/*
 	 * RECONCILE_IRQ_STATE without calling trace_hardirqs_off(), which
 	 * would clobber syscall parameters. Also we always enter with IRQs
-- 
GitLab


From b91eb5182405b01a8aeb42e9b5207831767e97ee Mon Sep 17 00:00:00 2001
From: Michael Ellerman <mpe@ellerman.id.au>
Date: Tue, 25 Aug 2020 19:34:24 +1000
Subject: [PATCH 0728/1341] powerpc/64s: Fix crash in load_fp_state() due to
 fpexc_mode

The recent commit 01eb01877f33 ("powerpc/64s: Fix restore_math
unnecessarily changing MSR") changed some of the handling of floating
point/vector restore.

In particular it caused current->thread.fpexc_mode to be copied into
the current MSR (via msr_check_and_set()), rather than just into
regs->msr (which is moved into MSR on return to userspace).

This can lead to a crash in the kernel if we take a floating point
exception when restoring FPSCR:

  Oops: Exception in kernel mode, sig: 8 [#1]
  LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA PowerNV
  Modules linked in:
  CPU: 3 PID: 101213 Comm: ld64.so.2 Not tainted 5.9.0-rc1-00098-g18445bf405cb-dirty #9
  NIP:  c00000000000fbb4 LR: c00000000001a7ac CTR: c000000000183570
  REGS: c0000016b7cfb3b0 TRAP: 0700   Not tainted  (5.9.0-rc1-00098-g18445bf405cb-dirty)
  MSR:  900000000290b933 <SF,HV,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>  CR: 44002444  XER: 00000000
  CFAR: c00000000001a7a8 IRQMASK: 1
  GPR00: c00000000001ae40 c0000016b7cfb640 c0000000011b7f00 c000001542a0f740
  GPR04: c000001542a0f720 c000001542a0eb00 0000000000000900 c000001542a0eb00
  GPR08: 000000000000000a 0000000000002000 9000000000009033 0000000000000000
  GPR12: 0000000000004000 c0000017ffffd900 0000000000000001 c000000000df5a58
  GPR16: c000000000e19c18 c0000000010e1123 0000000000000001 c000000000e1a638
  GPR20: 0000000000000000 c0000000044b1d00 0000000000000000 c000001542a0f2a0
  GPR24: 00000016c7fe0000 c000001542a0f720 c000000001c93da0 c000000000fe5f28
  GPR28: c000001542a0f720 0000000000800000 c0000016b7cfbe90 0000000002802900
  NIP load_fp_state+0x4/0x214
  LR  restore_math+0x17c/0x1f0
  Call Trace:
    0xc0000016b7cfb680 (unreliable)
    __switch_to+0x330/0x460
    __schedule+0x318/0x920
    schedule+0x74/0x140
    schedule_timeout+0x318/0x3f0
    wait_for_completion+0xc8/0x210
    call_usermodehelper_exec+0x234/0x280
    do_coredump+0xedc/0x13c0
    get_signal+0x1d4/0xbe0
    do_notify_resume+0x1a0/0x490
    interrupt_exit_user_prepare+0x1c4/0x230
    interrupt_return+0x14/0x1c0
  Instruction dump:
  ebe10168 e88101a0 7c8ff120 382101e0 e8010010 7c0803a6 4e800020 790605c4
  782905c4 7c0008a8 7c0008a8 c8030200 <fffe058e> 48000088 c8030000 c8230010

Fix it by only loading the fpexc_mode value into regs->msr.

Also add a comment to explain that although VSX is subject to the
value of fpexc_mode, we don't have to handle that separately because
we only allow VSX to be enabled if FP is also enabled.

Fixes: 01eb01877f33 ("powerpc/64s: Fix restore_math unnecessarily changing MSR")
Reported-by: Milton Miller <miltonm@us.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Link: https://lore.kernel.org/r/20200825093424.3967813-1-mpe@ellerman.id.au
---
 arch/powerpc/kernel/process.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 016bd831908ec..73a57043ee662 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -548,7 +548,7 @@ void notrace restore_math(struct pt_regs *regs)
 	 * are live for the user thread).
 	 */
 	if ((!(msr & MSR_FP)) && should_restore_fp())
-		new_msr |= MSR_FP | current->thread.fpexc_mode;
+		new_msr |= MSR_FP;
 
 	if ((!(msr & MSR_VEC)) && should_restore_altivec())
 		new_msr |= MSR_VEC;
@@ -559,11 +559,17 @@ void notrace restore_math(struct pt_regs *regs)
 	}
 
 	if (new_msr) {
+		unsigned long fpexc_mode = 0;
+
 		msr_check_and_set(new_msr);
 
-		if (new_msr & MSR_FP)
+		if (new_msr & MSR_FP) {
 			do_restore_fp();
 
+			// This also covers VSX, because VSX implies FP
+			fpexc_mode = current->thread.fpexc_mode;
+		}
+
 		if (new_msr & MSR_VEC)
 			do_restore_altivec();
 
@@ -572,7 +578,7 @@ void notrace restore_math(struct pt_regs *regs)
 
 		msr_check_and_clear(new_msr);
 
-		regs->msr |= new_msr;
+		regs->msr |= new_msr | fpexc_mode;
 	}
 }
 #endif
-- 
GitLab


From b460b512417ae9c8b51a3bdcc09020cd6c60ff69 Mon Sep 17 00:00:00 2001
From: Alexey Kardashevskiy <aik@ozlabs.ru>
Date: Tue, 2 Jun 2020 12:56:12 +1000
Subject: [PATCH 0729/1341] powerpc/perf: Fix crashes with generic_compat_pmu &
 BHRB

The bhrb_filter_map ("The Branch History Rolling Buffer") callback is
only defined in raw CPUs' power_pmu structs. The "architected" CPUs
use generic_compat_pmu, which does not have this callback, and crashes
occur if a user tries to enable branch stack for an event.

This add a NULL pointer check for bhrb_filter_map() which behaves as
if the callback returned an error.

This does not add the same check for config_bhrb() as the only caller
checks for cpuhw->bhrb_users which remains zero if bhrb_filter_map==0.

Fixes: be80e758d0c2 ("powerpc/perf: Add generic compat mode pmu driver")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200602025612.62707-1-aik@ozlabs.ru
---
 arch/powerpc/perf/core-book3s.c | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/perf/core-book3s.c b/arch/powerpc/perf/core-book3s.c
index 93d20e1ed8451..08643cba14948 100644
--- a/arch/powerpc/perf/core-book3s.c
+++ b/arch/powerpc/perf/core-book3s.c
@@ -1557,9 +1557,16 @@ static int power_pmu_add(struct perf_event *event, int ef_flags)
 	ret = 0;
  out:
 	if (has_branch_stack(event)) {
-		power_pmu_bhrb_enable(event);
-		cpuhw->bhrb_filter = ppmu->bhrb_filter_map(
-					event->attr.branch_sample_type);
+		u64 bhrb_filter = -1;
+
+		if (ppmu->bhrb_filter_map)
+			bhrb_filter = ppmu->bhrb_filter_map(
+				event->attr.branch_sample_type);
+
+		if (bhrb_filter != -1) {
+			cpuhw->bhrb_filter = bhrb_filter;
+			power_pmu_bhrb_enable(event);
+		}
 	}
 
 	perf_pmu_enable(event->pmu);
@@ -1881,7 +1888,6 @@ static int power_pmu_event_init(struct perf_event *event)
 	int n;
 	int err;
 	struct cpu_hw_events *cpuhw;
-	u64 bhrb_filter;
 
 	if (!ppmu)
 		return -ENOENT;
@@ -1987,7 +1993,10 @@ static int power_pmu_event_init(struct perf_event *event)
 	err = power_check_constraints(cpuhw, events, cflags, n + 1);
 
 	if (has_branch_stack(event)) {
-		bhrb_filter = ppmu->bhrb_filter_map(
+		u64 bhrb_filter = -1;
+
+		if (ppmu->bhrb_filter_map)
+			bhrb_filter = ppmu->bhrb_filter_map(
 					event->attr.branch_sample_type);
 
 		if (bhrb_filter == -1) {
-- 
GitLab


From 82715a0f332843d3a1830d7ebc9ac7c99a00c880 Mon Sep 17 00:00:00 2001
From: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Date: Wed, 26 Aug 2020 02:40:29 -0400
Subject: [PATCH 0730/1341] powerpc/perf: Fix reading of MSR[HV/PR] bits in
 trace-imc

IMC trace-mode uses MSR[HV/PR] bits to set the cpumode for the
instruction pointer captured in each sample. The bits are fetched from
the third double word of the trace record. Reading third double word
from IMC trace record should use be64_to_cpu() along with READ_ONCE
inorder to fetch correct MSR[HV/PR] bits. Patch addresses this change.

Currently we are using PERF_RECORD_MISC_HYPERVISOR as cpumode if MSR
HV is 1 and PR is 0 which means the address is from host counter. But
using PERF_RECORD_MISC_HYPERVISOR for host counter data will fail to
resolve the address -> symbol during "perf report" because perf tools
side uses PERF_RECORD_MISC_KERNEL to represent the host counter data.
Therefore, fix the trace imc sample data to use
PERF_RECORD_MISC_KERNEL as cpumode for host kernel information.

Fixes: 77ca3951cc37 ("powerpc/perf: Add kernel support for new MSR[HV PR] bits in trace-imc")
Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1598424029-1662-1-git-send-email-atrajeev@linux.vnet.ibm.com
---
 arch/powerpc/perf/imc-pmu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c
index a45d694a5d5d8..62d0b54086f88 100644
--- a/arch/powerpc/perf/imc-pmu.c
+++ b/arch/powerpc/perf/imc-pmu.c
@@ -1289,7 +1289,7 @@ static int trace_imc_prepare_sample(struct trace_imc_data *mem,
 	header->misc = 0;
 
 	if (cpu_has_feature(CPU_FTR_ARCH_31)) {
-		switch (IMC_TRACE_RECORD_VAL_HVPR(mem->val)) {
+		switch (IMC_TRACE_RECORD_VAL_HVPR(be64_to_cpu(READ_ONCE(mem->val)))) {
 		case 0:/* when MSR HV and PR not set in the trace-record */
 			header->misc |= PERF_RECORD_MISC_GUEST_KERNEL;
 			break;
@@ -1297,7 +1297,7 @@ static int trace_imc_prepare_sample(struct trace_imc_data *mem,
 			header->misc |= PERF_RECORD_MISC_GUEST_USER;
 			break;
 		case 2: /* MSR HV is 1 and PR is 0 */
-			header->misc |= PERF_RECORD_MISC_HYPERVISOR;
+			header->misc |= PERF_RECORD_MISC_KERNEL;
 			break;
 		case 3: /* MSR HV is 1 and PR is 1 */
 			header->misc |= PERF_RECORD_MISC_USER;
-- 
GitLab


From 16d83a540ca4e7f1ebb2b3756869b77451d31414 Mon Sep 17 00:00:00 2001
From: Pratik Rajesh Sampat <psampat@linux.ibm.com>
Date: Wed, 26 Aug 2020 13:59:18 +0530
Subject: [PATCH 0731/1341] Revert "powerpc/powernv/idle: Replace CPU feature
 check with PVR check"

cpuidle stop state implementation has minor optimizations for P10
where hardware preserves more SPR registers compared to P9. The
current P9 driver works for P10, although does few extra
save-restores. P9 driver can provide the required power management
features like SMT thread folding and core level power savings on a P10
platform.

Until the P10 stop driver is available, revert the commit which allows
for only P9 systems to utilize cpuidle and blocks all idle stop states
for P10. CPU idle states are enabled and tested on the P10 platform
with this fix.

This reverts commit 8747bf36f312356f8a295a0c39ff092d65ce75ae.

Fixes: 8747bf36f312 ("powerpc/powernv/idle: Replace CPU feature check with PVR check")
Signed-off-by: Pratik Rajesh Sampat <psampat@linux.ibm.com>
Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200826082918.89306-1-psampat@linux.ibm.com
---
 arch/powerpc/platforms/powernv/idle.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/powernv/idle.c b/arch/powerpc/platforms/powernv/idle.c
index 77513a80cef90..345ab062b21af 100644
--- a/arch/powerpc/platforms/powernv/idle.c
+++ b/arch/powerpc/platforms/powernv/idle.c
@@ -1223,7 +1223,7 @@ static void __init pnv_probe_idle_states(void)
 		return;
 	}
 
-	if (pvr_version_is(PVR_POWER9))
+	if (cpu_has_feature(CPU_FTR_ARCH_300))
 		pnv_power9_idle_init();
 
 	for (i = 0; i < nr_pnv_idle_states; i++)
-- 
GitLab


From aac544c3553d98ebe150dda19a25aa253f7ad3fe Mon Sep 17 00:00:00 2001
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Date: Tue, 25 Aug 2020 01:25:11 +0200
Subject: [PATCH 0732/1341] Compiler Attributes: remove comment about sparse
 not supporting __has_attribute

Sparse supports __has_attribute() since 2018-08-31, so the comment
is not true anymore but more importantly is rather confusing.

So remove it.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
---
 include/linux/compiler_attributes.h | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/include/linux/compiler_attributes.h b/include/linux/compiler_attributes.h
index 6122efdad6adf..af7a58c19e203 100644
--- a/include/linux/compiler_attributes.h
+++ b/include/linux/compiler_attributes.h
@@ -24,12 +24,6 @@
  * __has_attribute is supported on gcc >= 5, clang >= 2.9 and icc >= 17.
  * In the meantime, to support 4.6 <= gcc < 5, we implement __has_attribute
  * by hand.
- *
- * sparse does not support __has_attribute (yet) and defines __GNUC_MINOR__
- * depending on the compiler used to build it; however, these attributes have
- * no semantic effects for sparse, so it does not matter. Also note that,
- * in order to avoid sparse's warnings, even the unsupported ones must be
- * defined to 0.
  */
 #ifndef __has_attribute
 # define __has_attribute(x) __GCC4_has_attribute_##x
-- 
GitLab


From 5861af92ff2a2e002449191413c35f3ec5f721fe Mon Sep 17 00:00:00 2001
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Date: Tue, 25 Aug 2020 01:25:26 +0200
Subject: [PATCH 0733/1341] Compiler Attributes: fix comment concerning GCC 4.6

GCC 4.6 is not supported anymore, so remove a reference to it,
leaving just the part about version prior GCC 5.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
---
 include/linux/compiler_attributes.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/compiler_attributes.h b/include/linux/compiler_attributes.h
index af7a58c19e203..ea7b756b1c8f1 100644
--- a/include/linux/compiler_attributes.h
+++ b/include/linux/compiler_attributes.h
@@ -22,7 +22,7 @@
 
 /*
  * __has_attribute is supported on gcc >= 5, clang >= 2.9 and icc >= 17.
- * In the meantime, to support 4.6 <= gcc < 5, we implement __has_attribute
+ * In the meantime, to support gcc < 5, we implement __has_attribute
  * by hand.
  */
 #ifndef __has_attribute
-- 
GitLab


From 8ed37e79196033dbdb09a4eea9465af6a0e29fe9 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 21 Aug 2020 18:30:43 +0200
Subject: [PATCH 0734/1341] mac80211: use rate provided via status->rate on
 ieee80211_tx_status_ext for AQL
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Since ieee80211_tx_info does not have enough room to encode HE rates, HE
drivers use status->rate to provide rate info.
Store it in struct sta_info and use it for AQL.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20200821163045.62140-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/mac80211/airtime.c  | 53 +++++++++++++++++++++++++++++++++++++++--
 net/mac80211/sta_info.h |  1 +
 net/mac80211/status.c   | 12 ++++++----
 3 files changed, 60 insertions(+), 6 deletions(-)

diff --git a/net/mac80211/airtime.c b/net/mac80211/airtime.c
index 366f76c9003dd..656c9a033714a 100644
--- a/net/mac80211/airtime.c
+++ b/net/mac80211/airtime.c
@@ -487,14 +487,61 @@ u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
 }
 EXPORT_SYMBOL_GPL(ieee80211_calc_rx_airtime);
 
+static bool ieee80211_fill_rate_info(struct ieee80211_hw *hw,
+				     struct ieee80211_rx_status *stat, u8 band,
+				     struct rate_info *ri)
+{
+	struct ieee80211_supported_band *sband = hw->wiphy->bands[band];
+	int i;
+
+	if (!ri || !sband)
+	    return false;
+
+	stat->bw = ri->bw;
+	stat->nss = ri->nss;
+	stat->rate_idx = ri->mcs;
+
+	if (ri->flags & RATE_INFO_FLAGS_HE_MCS)
+		stat->encoding = RX_ENC_HE;
+	else if (ri->flags & RATE_INFO_FLAGS_VHT_MCS)
+		stat->encoding = RX_ENC_VHT;
+	else if (ri->flags & RATE_INFO_FLAGS_MCS)
+		stat->encoding = RX_ENC_HT;
+	else
+		stat->encoding = RX_ENC_LEGACY;
+
+	if (ri->flags & RATE_INFO_FLAGS_SHORT_GI)
+		stat->enc_flags |= RX_ENC_FLAG_SHORT_GI;
+
+	stat->he_gi = ri->he_gi;
+
+	if (stat->encoding != RX_ENC_LEGACY)
+		return true;
+
+	stat->rate_idx = 0;
+	for (i = 0; i < sband->n_bitrates; i++) {
+		if (ri->legacy != sband->bitrates[i].bitrate)
+			continue;
+
+		stat->rate_idx = i;
+		return true;
+	}
+
+	return false;
+}
+
 static u32 ieee80211_calc_tx_airtime_rate(struct ieee80211_hw *hw,
 					  struct ieee80211_tx_rate *rate,
+					  struct rate_info *ri,
 					  u8 band, int len)
 {
 	struct ieee80211_rx_status stat = {
 		.band = band,
 	};
 
+	if (ieee80211_fill_rate_info(hw, &stat, band, ri))
+		goto out;
+
 	if (rate->idx < 0 || !rate->count)
 		return 0;
 
@@ -522,6 +569,7 @@ static u32 ieee80211_calc_tx_airtime_rate(struct ieee80211_hw *hw,
 		stat.encoding = RX_ENC_LEGACY;
 	}
 
+out:
 	return ieee80211_calc_rx_airtime(hw, &stat, len);
 }
 
@@ -536,7 +584,7 @@ u32 ieee80211_calc_tx_airtime(struct ieee80211_hw *hw,
 		struct ieee80211_tx_rate *rate = &info->status.rates[i];
 		u32 cur_duration;
 
-		cur_duration = ieee80211_calc_tx_airtime_rate(hw, rate,
+		cur_duration = ieee80211_calc_tx_airtime_rate(hw, rate, NULL,
 							      info->band, len);
 		if (!cur_duration)
 			break;
@@ -573,6 +621,7 @@ u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
 		struct sta_info *sta = container_of(pubsta, struct sta_info,
 						    sta);
 		struct ieee80211_tx_rate *rate = &sta->tx_stats.last_rate;
+		struct rate_info *ri = &sta->tx_stats.last_rate_info;
 		u32 airtime;
 
 		if (!(rate->flags & (IEEE80211_TX_RC_VHT_MCS |
@@ -586,7 +635,7 @@ u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
 		 * This will not be very accurate, but much better than simply
 		 * assuming un-aggregated tx.
 		 */
-		airtime = ieee80211_calc_tx_airtime_rate(hw, rate, band,
+		airtime = ieee80211_calc_tx_airtime_rate(hw, rate, ri, band,
 							 ampdu ? len * 16 : len);
 		if (ampdu)
 			airtime /= 16;
diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 9d398c9daa4c6..8060d142e4f1f 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -611,6 +611,7 @@ struct sta_info {
 		u64 packets[IEEE80211_NUM_ACS];
 		u64 bytes[IEEE80211_NUM_ACS];
 		struct ieee80211_tx_rate last_rate;
+		struct rate_info last_rate_info;
 		u64 msdu[IEEE80211_NUM_TIDS + 1];
 	} tx_stats;
 	u16 tid_seq[IEEE80211_QOS_CTL_TID_MASK + 1];
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index adb1d30ce06ef..6de63f1d8c7b0 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -1137,9 +1137,17 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
 	struct ieee80211_tx_info *info = status->info;
 	struct ieee80211_sta *pubsta = status->sta;
 	struct ieee80211_supported_band *sband;
+	struct sta_info *sta;
 	int retry_count;
 	bool acked, noack_success;
 
+	if (pubsta) {
+		sta = container_of(pubsta, struct sta_info, sta);
+
+		if (status->rate)
+			sta->tx_stats.last_rate_info = *status->rate;
+	}
+
 	if (status->skb)
 		return __ieee80211_tx_status(hw, status);
 
@@ -1154,10 +1162,6 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
 	noack_success = !!(info->flags & IEEE80211_TX_STAT_NOACK_TRANSMITTED);
 
 	if (pubsta) {
-		struct sta_info *sta;
-
-		sta = container_of(pubsta, struct sta_info, sta);
-
 		if (!acked && !noack_success)
 			sta->status_stats.retry_failed++;
 		sta->status_stats.retry_count += retry_count;
-- 
GitLab


From 43cd72c5892c46fe69b8a1682fb4905cf158c39c Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 21 Aug 2020 18:30:44 +0200
Subject: [PATCH 0735/1341] mac80211: factor out code to look up the average
 packet length duration for a rate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This will be used to enhance AQL estimated aggregation length

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20200821163045.62140-2-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/mac80211/airtime.c | 121 +++++++++++++++++++++++++----------------
 1 file changed, 74 insertions(+), 47 deletions(-)

diff --git a/net/mac80211/airtime.c b/net/mac80211/airtime.c
index 656c9a033714a..ba95f4ee1f710 100644
--- a/net/mac80211/airtime.c
+++ b/net/mac80211/airtime.c
@@ -405,18 +405,14 @@ ieee80211_calc_legacy_rate_duration(u16 bitrate, bool short_pre,
 	return duration;
 }
 
-u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
-			      struct ieee80211_rx_status *status,
-			      int len)
+static u32 ieee80211_get_rate_duration(struct ieee80211_hw *hw,
+				       struct ieee80211_rx_status *status,
+				       u32 *overhead)
 {
-	struct ieee80211_supported_band *sband;
-	const struct ieee80211_rate *rate;
 	bool sgi = status->enc_flags & RX_ENC_FLAG_SHORT_GI;
-	bool sp = status->enc_flags & RX_ENC_FLAG_SHORTPRE;
 	int bw, streams;
 	int group, idx;
 	u32 duration;
-	bool cck;
 
 	switch (status->bw) {
 	case RATE_INFO_BW_20:
@@ -437,20 +433,6 @@ u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
 	}
 
 	switch (status->encoding) {
-	case RX_ENC_LEGACY:
-		if (WARN_ON_ONCE(status->band > NL80211_BAND_5GHZ))
-			return 0;
-
-		sband = hw->wiphy->bands[status->band];
-		if (!sband || status->rate_idx >= sband->n_bitrates)
-			return 0;
-
-		rate = &sband->bitrates[status->rate_idx];
-		cck = rate->flags & IEEE80211_RATE_MANDATORY_B;
-
-		return ieee80211_calc_legacy_rate_duration(rate->bitrate, sp,
-							   cck, len);
-
 	case RX_ENC_VHT:
 		streams = status->nss;
 		idx = status->rate_idx;
@@ -477,13 +459,47 @@ u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
 
 	duration = airtime_mcs_groups[group].duration[idx];
 	duration <<= airtime_mcs_groups[group].shift;
+	*overhead = 36 + (streams << 2);
+
+	return duration;
+}
+
+
+u32 ieee80211_calc_rx_airtime(struct ieee80211_hw *hw,
+			      struct ieee80211_rx_status *status,
+			      int len)
+{
+	struct ieee80211_supported_band *sband;
+	u32 duration, overhead = 0;
+
+	if (status->encoding == RX_ENC_LEGACY) {
+		const struct ieee80211_rate *rate;
+		bool sp = status->enc_flags & RX_ENC_FLAG_SHORTPRE;
+		bool cck;
+
+		if (WARN_ON_ONCE(status->band > NL80211_BAND_5GHZ))
+			return 0;
+
+		sband = hw->wiphy->bands[status->band];
+		if (!sband || status->rate_idx >= sband->n_bitrates)
+			return 0;
+
+		rate = &sband->bitrates[status->rate_idx];
+		cck = rate->flags & IEEE80211_RATE_MANDATORY_B;
+
+		return ieee80211_calc_legacy_rate_duration(rate->bitrate, sp,
+							   cck, len);
+	}
+
+	duration = ieee80211_get_rate_duration(hw, status, &overhead);
+	if (!duration)
+		return 0;
+
 	duration *= len;
 	duration /= AVG_PKT_SIZE;
 	duration /= 1024;
 
-	duration += 36 + (streams << 2);
-
-	return duration;
+	return duration + overhead;
 }
 EXPORT_SYMBOL_GPL(ieee80211_calc_rx_airtime);
 
@@ -530,46 +546,57 @@ static bool ieee80211_fill_rate_info(struct ieee80211_hw *hw,
 	return false;
 }
 
-static u32 ieee80211_calc_tx_airtime_rate(struct ieee80211_hw *hw,
-					  struct ieee80211_tx_rate *rate,
-					  struct rate_info *ri,
-					  u8 band, int len)
+static int ieee80211_fill_rx_status(struct ieee80211_rx_status *stat,
+				    struct ieee80211_hw *hw,
+				    struct ieee80211_tx_rate *rate,
+				    struct rate_info *ri, u8 band, int len)
 {
-	struct ieee80211_rx_status stat = {
-		.band = band,
-	};
+	memset(stat, 0, sizeof(*stat));
+	stat->band = band;
 
-	if (ieee80211_fill_rate_info(hw, &stat, band, ri))
-		goto out;
+	if (ieee80211_fill_rate_info(hw, stat, band, ri))
+		return 0;
 
 	if (rate->idx < 0 || !rate->count)
-		return 0;
+		return -1;
 
 	if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
-		stat.bw = RATE_INFO_BW_80;
+		stat->bw = RATE_INFO_BW_80;
 	else if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
-		stat.bw = RATE_INFO_BW_40;
+		stat->bw = RATE_INFO_BW_40;
 	else
-		stat.bw = RATE_INFO_BW_20;
+		stat->bw = RATE_INFO_BW_20;
 
-	stat.enc_flags = 0;
+	stat->enc_flags = 0;
 	if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
-		stat.enc_flags |= RX_ENC_FLAG_SHORTPRE;
+		stat->enc_flags |= RX_ENC_FLAG_SHORTPRE;
 	if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
-		stat.enc_flags |= RX_ENC_FLAG_SHORT_GI;
+		stat->enc_flags |= RX_ENC_FLAG_SHORT_GI;
 
-	stat.rate_idx = rate->idx;
+	stat->rate_idx = rate->idx;
 	if (rate->flags & IEEE80211_TX_RC_VHT_MCS) {
-		stat.encoding = RX_ENC_VHT;
-		stat.rate_idx = ieee80211_rate_get_vht_mcs(rate);
-		stat.nss = ieee80211_rate_get_vht_nss(rate);
+		stat->encoding = RX_ENC_VHT;
+		stat->rate_idx = ieee80211_rate_get_vht_mcs(rate);
+		stat->nss = ieee80211_rate_get_vht_nss(rate);
 	} else if (rate->flags & IEEE80211_TX_RC_MCS) {
-		stat.encoding = RX_ENC_HT;
+		stat->encoding = RX_ENC_HT;
 	} else {
-		stat.encoding = RX_ENC_LEGACY;
+		stat->encoding = RX_ENC_LEGACY;
 	}
 
-out:
+	return 0;
+}
+
+static u32 ieee80211_calc_tx_airtime_rate(struct ieee80211_hw *hw,
+					  struct ieee80211_tx_rate *rate,
+					  struct rate_info *ri,
+					  u8 band, int len)
+{
+	struct ieee80211_rx_status stat;
+
+	if (ieee80211_fill_rx_status(&stat, hw, rate, ri, band, len))
+		return 0;
+
 	return ieee80211_calc_rx_airtime(hw, &stat, len);
 }
 
-- 
GitLab


From f01cfbaf9b2971126f094acfbda2589bd2394f4d Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Fri, 21 Aug 2020 18:30:45 +0200
Subject: [PATCH 0736/1341] mac80211: improve AQL aggregation estimation for
 low data rates
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Links with low data rates use much smaller aggregates and are much more
sensitive to latency added by bufferbloat.
Tune the assumed aggregation length based on the tx rate duration.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Link: https://lore.kernel.org/r/20200821163045.62140-3-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/mac80211/airtime.c | 38 ++++++++++++++++++++++++++------------
 1 file changed, 26 insertions(+), 12 deletions(-)

diff --git a/net/mac80211/airtime.c b/net/mac80211/airtime.c
index ba95f4ee1f710..314973033d038 100644
--- a/net/mac80211/airtime.c
+++ b/net/mac80211/airtime.c
@@ -647,27 +647,41 @@ u32 ieee80211_calc_expected_tx_airtime(struct ieee80211_hw *hw,
 	if (pubsta) {
 		struct sta_info *sta = container_of(pubsta, struct sta_info,
 						    sta);
+		struct ieee80211_rx_status stat;
 		struct ieee80211_tx_rate *rate = &sta->tx_stats.last_rate;
 		struct rate_info *ri = &sta->tx_stats.last_rate_info;
-		u32 airtime;
+		u32 duration, overhead;
+		u8 agg_shift;
 
-		if (!(rate->flags & (IEEE80211_TX_RC_VHT_MCS |
-				     IEEE80211_TX_RC_MCS)))
-			ampdu = false;
+		if (ieee80211_fill_rx_status(&stat, hw, rate, ri, band, len))
+			return 0;
+
+		if (stat.encoding == RX_ENC_LEGACY || !ampdu)
+			return ieee80211_calc_rx_airtime(hw, &stat, len);
 
+		duration = ieee80211_get_rate_duration(hw, &stat, &overhead);
 		/*
 		 * Assume that HT/VHT transmission on any AC except VO will
 		 * use aggregation. Since we don't have reliable reporting
-		 * of aggregation length, assume an average of 16.
+		 * of aggregation length, assume an average size based on the
+		 * tx rate.
 		 * This will not be very accurate, but much better than simply
-		 * assuming un-aggregated tx.
+		 * assuming un-aggregated tx in all cases.
 		 */
-		airtime = ieee80211_calc_tx_airtime_rate(hw, rate, ri, band,
-							 ampdu ? len * 16 : len);
-		if (ampdu)
-			airtime /= 16;
-
-		return airtime;
+		if (duration > 400) /* <= VHT20 MCS2 1S */
+			agg_shift = 1;
+		else if (duration > 250) /* <= VHT20 MCS3 1S or MCS1 2S */
+			agg_shift = 2;
+		else if (duration > 150) /* <= VHT20 MCS5 1S or MCS3 2S */
+			agg_shift = 3;
+		else
+			agg_shift = 4;
+
+		duration *= len;
+		duration /= AVG_PKT_SIZE;
+		duration /= 1024;
+
+		return duration + (overhead >> agg_shift);
 	}
 
 	if (!conf)
-- 
GitLab


From 3579994476b65cb5e272ff0f720a1fd31322e53f Mon Sep 17 00:00:00 2001
From: Shay Bar <shay.bar@celeno.com>
Date: Wed, 26 Aug 2020 17:31:39 +0300
Subject: [PATCH 0737/1341] wireless: fix wrong 160/80+80 MHz setting
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix cfg80211_chandef_usable():
consider IEEE80211_VHT_CAP_EXT_NSS_BW when verifying 160/80+80 MHz.

Based on:
"Table 9-272 — Setting of the Supported Channel Width Set subfield and Extended NSS BW
Support subfield at a STA transmitting the VHT Capabilities Information field"
From "Draft P802.11REVmd_D3.0.pdf"

Signed-off-by: Aviad Brikman <aviad.brikman@celeno.com>
Signed-off-by: Shay Bar <shay.bar@celeno.com>
Link: https://lore.kernel.org/r/20200826143139.25976-1-shay.bar@celeno.com
[reformat the code a bit and use u32_get_bits()]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/chan.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index 90f0f82cd9ca7..edee3a645c068 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -10,6 +10,7 @@
  */
 
 #include <linux/export.h>
+#include <linux/bitfield.h>
 #include <net/cfg80211.h>
 #include "core.h"
 #include "rdev-ops.h"
@@ -912,6 +913,7 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
 	struct ieee80211_sta_vht_cap *vht_cap;
 	struct ieee80211_edmg *edmg_cap;
 	u32 width, control_freq, cap;
+	bool support_80_80 = false;
 
 	if (WARN_ON(!cfg80211_chandef_valid(chandef)))
 		return false;
@@ -979,9 +981,13 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
 			return false;
 		break;
 	case NL80211_CHAN_WIDTH_80P80:
-		cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
-		if (chandef->chan->band != NL80211_BAND_6GHZ &&
-		    cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
+		cap = vht_cap->cap;
+		support_80_80 =
+			(cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
+			(cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
+			 cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
+			u32_get_bits(cap, IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) > 1;
+		if (chandef->chan->band != NL80211_BAND_6GHZ && !support_80_80)
 			return false;
 		/* fall through */
 	case NL80211_CHAN_WIDTH_80:
@@ -1001,7 +1007,8 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
 			return false;
 		cap = vht_cap->cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK;
 		if (cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
-		    cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ)
+		    cap != IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ &&
+		    !(vht_cap->cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))
 			return false;
 		break;
 	default:
-- 
GitLab


From 47caf685a6854593348f216e0b489b71c10cbe03 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Wed, 19 Aug 2020 10:46:48 +0200
Subject: [PATCH 0738/1341] cfg80211: regulatory: reject invalid hints

Reject invalid hints early in order to not cause a kernel
WARN later if they're restored to or similar.

Reported-by: syzbot+d451401ffd00a60677ee@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?extid=d451401ffd00a60677ee
Link: https://lore.kernel.org/r/20200819084648.13956-1-johannes@sipsolutions.net
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/reg.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index 35b8847a2f6d0..d8a90d3974235 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -2946,6 +2946,9 @@ int regulatory_hint_user(const char *alpha2,
 	if (WARN_ON(!alpha2))
 		return -EINVAL;
 
+	if (!is_world_regdom(alpha2) && !is_an_alpha2(alpha2))
+		return -EINVAL;
+
 	request = kzalloc(sizeof(struct regulatory_request), GFP_KERNEL);
 	if (!request)
 		return -ENOMEM;
-- 
GitLab


From 47df8e059b49a80c179fae39256bcd7096810934 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@nbd.name>
Date: Sat, 8 Aug 2020 19:25:42 +0200
Subject: [PATCH 0739/1341] mac80211: reduce packet loss event false positives

When running a large number of packets per second with a high data rate
and long A-MPDUs, the packet loss threshold can be reached very quickly
when the link conditions change. This frequently shows up as spurious
disconnects.
Mitigate false positives by using a similar logic for regular stations
as the one being used for TDLS, though with a more aggressive timeout.
Packet loss events are only reported if no ACK was received for a second.

Signed-off-by: Felix Fietkau <nbd@nbd.name>
Link: https://lore.kernel.org/r/20200808172542.41628-1-nbd@nbd.name
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/mac80211/sta_info.h |  4 ++--
 net/mac80211/status.c   | 31 +++++++++++++++----------------
 2 files changed, 17 insertions(+), 18 deletions(-)

diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h
index 8060d142e4f1f..d5010116cf4d1 100644
--- a/net/mac80211/sta_info.h
+++ b/net/mac80211/sta_info.h
@@ -524,7 +524,7 @@ struct ieee80211_sta_rx_stats {
  * @status_stats.retry_failed: # of frames that failed after retry
  * @status_stats.retry_count: # of retries attempted
  * @status_stats.lost_packets: # of lost packets
- * @status_stats.last_tdls_pkt_time: timestamp of last TDLS packet
+ * @status_stats.last_pkt_time: timestamp of last ACKed packet
  * @status_stats.msdu_retries: # of MSDU retries
  * @status_stats.msdu_failed: # of failed MSDUs
  * @status_stats.last_ack: last ack timestamp (jiffies)
@@ -597,7 +597,7 @@ struct sta_info {
 		unsigned long filtered;
 		unsigned long retry_failed, retry_count;
 		unsigned int lost_packets;
-		unsigned long last_tdls_pkt_time;
+		unsigned long last_pkt_time;
 		u64 msdu_retries[IEEE80211_NUM_TIDS + 1];
 		u64 msdu_failed[IEEE80211_NUM_TIDS + 1];
 		unsigned long last_ack;
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index 6de63f1d8c7b0..0794396a79884 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -755,12 +755,16 @@ static void ieee80211_report_used_skb(struct ieee80211_local *local,
  *  - current throughput (higher value for higher tpt)?
  */
 #define STA_LOST_PKT_THRESHOLD	50
+#define STA_LOST_PKT_TIME	HZ		/* 1 sec since last ACK */
 #define STA_LOST_TDLS_PKT_THRESHOLD	10
 #define STA_LOST_TDLS_PKT_TIME		(10*HZ) /* 10secs since last ACK */
 
 static void ieee80211_lost_packet(struct sta_info *sta,
 				  struct ieee80211_tx_info *info)
 {
+	unsigned long pkt_time = STA_LOST_PKT_TIME;
+	unsigned int pkt_thr = STA_LOST_PKT_THRESHOLD;
+
 	/* If driver relies on its own algorithm for station kickout, skip
 	 * mac80211 packet loss mechanism.
 	 */
@@ -773,21 +777,20 @@ static void ieee80211_lost_packet(struct sta_info *sta,
 		return;
 
 	sta->status_stats.lost_packets++;
-	if (!sta->sta.tdls &&
-	    sta->status_stats.lost_packets < STA_LOST_PKT_THRESHOLD)
-		return;
+	if (sta->sta.tdls) {
+		pkt_time = STA_LOST_TDLS_PKT_TIME;
+		pkt_thr = STA_LOST_PKT_THRESHOLD;
+	}
 
 	/*
 	 * If we're in TDLS mode, make sure that all STA_LOST_TDLS_PKT_THRESHOLD
 	 * of the last packets were lost, and that no ACK was received in the
 	 * last STA_LOST_TDLS_PKT_TIME ms, before triggering the CQM packet-loss
 	 * mechanism.
+	 * For non-TDLS, use STA_LOST_PKT_THRESHOLD and STA_LOST_PKT_TIME
 	 */
-	if (sta->sta.tdls &&
-	    (sta->status_stats.lost_packets < STA_LOST_TDLS_PKT_THRESHOLD ||
-	     time_before(jiffies,
-			 sta->status_stats.last_tdls_pkt_time +
-			 STA_LOST_TDLS_PKT_TIME)))
+	if (sta->status_stats.lost_packets < pkt_thr ||
+	    !time_after(jiffies, sta->status_stats.last_pkt_time + pkt_time))
 		return;
 
 	cfg80211_cqm_pktloss_notify(sta->sdata->dev, sta->sta.addr,
@@ -1033,9 +1036,7 @@ static void __ieee80211_tx_status(struct ieee80211_hw *hw,
 					sta->status_stats.lost_packets = 0;
 
 				/* Track when last TDLS packet was ACKed */
-				if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
-					sta->status_stats.last_tdls_pkt_time =
-						jiffies;
+				sta->status_stats.last_pkt_time = jiffies;
 			} else if (noack_success) {
 				/* nothing to do here, do not account as lost */
 			} else {
@@ -1172,9 +1173,8 @@ void ieee80211_tx_status_ext(struct ieee80211_hw *hw,
 			if (sta->status_stats.lost_packets)
 				sta->status_stats.lost_packets = 0;
 
-			/* Track when last TDLS packet was ACKed */
-			if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
-				sta->status_stats.last_tdls_pkt_time = jiffies;
+			/* Track when last packet was ACKed */
+			sta->status_stats.last_pkt_time = jiffies;
 		} else if (test_sta_flag(sta, WLAN_STA_PS_STA)) {
 			return;
 		} else if (noack_success) {
@@ -1263,8 +1263,7 @@ void ieee80211_tx_status_8023(struct ieee80211_hw *hw,
 			if (sta->status_stats.lost_packets)
 				sta->status_stats.lost_packets = 0;
 
-			if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
-				sta->status_stats.last_tdls_pkt_time = jiffies;
+			sta->status_stats.last_pkt_time = jiffies;
 		} else {
 			ieee80211_lost_packet(sta, info);
 		}
-- 
GitLab


From 2d9b55508556ccee6410310fb9ea2482fd3328eb Mon Sep 17 00:00:00 2001
From: Amar Singhal <asinghal@codeaurora.org>
Date: Fri, 19 Jun 2020 13:52:01 -0700
Subject: [PATCH 0740/1341] cfg80211: Adjust 6 GHz frequency to channel
 conversion

Adjust the 6 GHz frequency to channel conversion function,
the other way around was previously handled.

Signed-off-by: Amar Singhal <asinghal@codeaurora.org>
Link: https://lore.kernel.org/r/1592599921-10607-1-git-send-email-asinghal@codeaurora.org
[rewrite commit message, hard-code channel 2]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/util.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/net/wireless/util.c b/net/wireless/util.c
index dfad1c0f57adb..c62eb3d9ab3d4 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -123,11 +123,13 @@ int ieee80211_freq_khz_to_channel(u32 freq)
 		return (freq - 2407) / 5;
 	else if (freq >= 4910 && freq <= 4980)
 		return (freq - 4000) / 5;
-	else if (freq < 5945)
+	else if (freq < 5925)
 		return (freq - 5000) / 5;
+	else if (freq == 5935)
+		return 2;
 	else if (freq <= 45000) /* DMG band lower limit */
-		/* see 802.11ax D4.1 27.3.22.2 */
-		return (freq - 5940) / 5;
+		/* see 802.11ax D6.1 27.3.22.2 */
+		return (freq - 5950) / 5;
 	else if (freq >= 58320 && freq <= 70200)
 		return (freq - 56160) / 2160;
 	else
-- 
GitLab


From 681fe68448ef370f1d7213cab38013ab8e9d8ff0 Mon Sep 17 00:00:00 2001
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Thu, 27 Aug 2020 10:54:15 +0530
Subject: [PATCH 0741/1341] cpufreq: No need to verify cpufreq_driver in
 show_scaling_cur_freq()

"cpufreq_driver" is guaranteed to be valid here, no need to check it
here.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpufreq/cpufreq.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 02ab56b2a0d8d..47aa90f9a7c2e 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -703,8 +703,7 @@ static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf)
 	freq = arch_freq_get_on_cpu(policy->cpu);
 	if (freq)
 		ret = sprintf(buf, "%u\n", freq);
-	else if (cpufreq_driver && cpufreq_driver->setpolicy &&
-			cpufreq_driver->get)
+	else if (cpufreq_driver->setpolicy && cpufreq_driver->get)
 		ret = sprintf(buf, "%u\n", cpufreq_driver->get(policy->cpu));
 	else
 		ret = sprintf(buf, "%u\n", policy->cur);
-- 
GitLab


From 30b8e6b22fd0f7a56911e69c681e92532e72e3b6 Mon Sep 17 00:00:00 2001
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Thu, 27 Aug 2020 10:54:16 +0530
Subject: [PATCH 0742/1341] cpufreq: Use WARN_ON_ONCE() for invalid relation

The relation can't be invalid here, so if it turns out to be invalid,
just WARN_ON_ONCE() and return 0.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 include/linux/cpufreq.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 8f141d4c859ce..a911e5d068454 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -956,8 +956,8 @@ static inline int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
 	case CPUFREQ_RELATION_C:
 		return cpufreq_table_find_index_c(policy, target_freq);
 	default:
-		pr_err("%s: Invalid relation: %d\n", __func__, relation);
-		return -EINVAL;
+		WARN_ON_ONCE(1);
+		return 0;
 	}
 }
 
-- 
GitLab


From e3e39c72b99f93bbd0420d38c858e7c4a061bb63 Mon Sep 17 00:00:00 2001
From: Marcos Paulo de Souza <mpdesouza@suse.com>
Date: Fri, 21 Aug 2020 11:54:44 -0300
Subject: [PATCH 0743/1341] btrfs: block-group: fix free-space bitmap threshold

[BUG]
After commit 9afc66498a0b ("btrfs: block-group: refactor how we read one
block group item"), cache->length is being assigned after calling
btrfs_create_block_group_cache. This causes a problem since
set_free_space_tree_thresholds calculates the free-space threshold to
decide if the free-space tree should convert from extents to bitmaps.

The current code calls set_free_space_tree_thresholds with cache->length
being 0, which then makes cache->bitmap_high_thresh zero. This implies
the system will always use bitmap instead of extents, which is not
desired if the block group is not fragmented.

This behavior can be seen by a test that expects to repair systems
with FREE_SPACE_EXTENT and FREE_SPACE_BITMAP, but the current code only
created FREE_SPACE_BITMAP.

[FIX]
Call set_free_space_tree_thresholds after setting cache->length. There
is now a WARN_ON in set_free_space_tree_thresholds to help preventing
the same mistake to happen again in the future.

Link: https://github.com/kdave/btrfs-progs/issues/251
Fixes: 9afc66498a0b ("btrfs: block-group: refactor how we read one block group item")
CC: stable@vger.kernel.org # 5.8+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/block-group.c     | 4 +++-
 fs/btrfs/free-space-tree.c | 4 ++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c
index 613920c17ac1a..ea8aaf36647ee 100644
--- a/fs/btrfs/block-group.c
+++ b/fs/btrfs/block-group.c
@@ -1798,7 +1798,6 @@ static struct btrfs_block_group *btrfs_create_block_group_cache(
 
 	cache->fs_info = fs_info;
 	cache->full_stripe_len = btrfs_full_stripe_len(fs_info, start);
-	set_free_space_tree_thresholds(cache);
 
 	cache->discard_index = BTRFS_DISCARD_INDEX_UNUSED;
 
@@ -1912,6 +1911,8 @@ static int read_one_block_group(struct btrfs_fs_info *info,
 	if (ret < 0)
 		goto error;
 
+	set_free_space_tree_thresholds(cache);
+
 	if (need_clear) {
 		/*
 		 * When we mount with old space cache, we need to
@@ -2132,6 +2133,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, u64 bytes_used,
 		return -ENOMEM;
 
 	cache->length = size;
+	set_free_space_tree_thresholds(cache);
 	cache->used = bytes_used;
 	cache->flags = type;
 	cache->last_byte_to_unpin = (u64)-1;
diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
index 8b1f5c8897b75..6b9faf3b0e967 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -22,6 +22,10 @@ void set_free_space_tree_thresholds(struct btrfs_block_group *cache)
 	size_t bitmap_size;
 	u64 num_bitmaps, total_bitmap_size;
 
+	if (WARN_ON(cache->length == 0))
+		btrfs_warn(cache->fs_info, "block group %llu length is zero",
+			   cache->start);
+
 	/*
 	 * We convert to bitmaps when the disk space required for using extents
 	 * exceeds that required for using bitmaps.
-- 
GitLab


From e3ddd6067ee62f6e76ebcf61ff08b2c729ae412b Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Wed, 19 Aug 2020 15:56:32 +0800
Subject: [PATCH 0744/1341] RDMA/rxe: Fix memleak in rxe_mem_init_user

When page_address() fails, umem should be freed just like when
rxe_mem_alloc() fails.

Fixes: 8700e3e7c485 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20200819075632.22285-1-dinghao.liu@zju.edu.cn
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/sw/rxe/rxe_mr.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/infiniband/sw/rxe/rxe_mr.c b/drivers/infiniband/sw/rxe/rxe_mr.c
index cdd811a45120f..ce24144de16a9 100644
--- a/drivers/infiniband/sw/rxe/rxe_mr.c
+++ b/drivers/infiniband/sw/rxe/rxe_mr.c
@@ -205,6 +205,7 @@ int rxe_mem_init_user(struct rxe_pd *pd, u64 start,
 			vaddr = page_address(sg_page_iter_page(&sg_iter));
 			if (!vaddr) {
 				pr_warn("null vaddr\n");
+				ib_umem_release(umem);
 				err = -ENOMEM;
 				goto err1;
 			}
-- 
GitLab


From 9771a5cf937129307d9f58922d60484d58ababe7 Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@toxicpanda.com>
Date: Mon, 10 Aug 2020 11:42:26 -0400
Subject: [PATCH 0745/1341] btrfs: drop path before adding new uuid tree entry

With the conversion of the tree locks to rwsem I got the following
lockdep splat:

  ======================================================
  WARNING: possible circular locking dependency detected
  5.8.0-rc7-00167-g0d7ba0c5b375-dirty #925 Not tainted
  ------------------------------------------------------
  btrfs-uuid/7955 is trying to acquire lock:
  ffff88bfbafec0f8 (btrfs-root-00){++++}-{3:3}, at: __btrfs_tree_read_lock+0x39/0x180

  but task is already holding lock:
  ffff88bfbafef2a8 (btrfs-uuid-00){++++}-{3:3}, at: __btrfs_tree_read_lock+0x39/0x180

  which lock already depends on the new lock.

  the existing dependency chain (in reverse order) is:

  -> #1 (btrfs-uuid-00){++++}-{3:3}:
	 down_read_nested+0x3e/0x140
	 __btrfs_tree_read_lock+0x39/0x180
	 __btrfs_read_lock_root_node+0x3a/0x50
	 btrfs_search_slot+0x4bd/0x990
	 btrfs_uuid_tree_add+0x89/0x2d0
	 btrfs_uuid_scan_kthread+0x330/0x390
	 kthread+0x133/0x150
	 ret_from_fork+0x1f/0x30

  -> #0 (btrfs-root-00){++++}-{3:3}:
	 __lock_acquire+0x1272/0x2310
	 lock_acquire+0x9e/0x360
	 down_read_nested+0x3e/0x140
	 __btrfs_tree_read_lock+0x39/0x180
	 __btrfs_read_lock_root_node+0x3a/0x50
	 btrfs_search_slot+0x4bd/0x990
	 btrfs_find_root+0x45/0x1b0
	 btrfs_read_tree_root+0x61/0x100
	 btrfs_get_root_ref.part.50+0x143/0x630
	 btrfs_uuid_tree_iterate+0x207/0x314
	 btrfs_uuid_rescan_kthread+0x12/0x50
	 kthread+0x133/0x150
	 ret_from_fork+0x1f/0x30

  other info that might help us debug this:

   Possible unsafe locking scenario:

	 CPU0                    CPU1
	 ----                    ----
    lock(btrfs-uuid-00);
				 lock(btrfs-root-00);
				 lock(btrfs-uuid-00);
    lock(btrfs-root-00);

   *** DEADLOCK ***

  1 lock held by btrfs-uuid/7955:
   #0: ffff88bfbafef2a8 (btrfs-uuid-00){++++}-{3:3}, at: __btrfs_tree_read_lock+0x39/0x180

  stack backtrace:
  CPU: 73 PID: 7955 Comm: btrfs-uuid Kdump: loaded Not tainted 5.8.0-rc7-00167-g0d7ba0c5b375-dirty #925
  Hardware name: Quanta Tioga Pass Single Side 01-0030993006/Tioga Pass Single Side, BIOS F08_3A18 12/20/2018
  Call Trace:
   dump_stack+0x78/0xa0
   check_noncircular+0x165/0x180
   __lock_acquire+0x1272/0x2310
   lock_acquire+0x9e/0x360
   ? __btrfs_tree_read_lock+0x39/0x180
   ? btrfs_root_node+0x1c/0x1d0
   down_read_nested+0x3e/0x140
   ? __btrfs_tree_read_lock+0x39/0x180
   __btrfs_tree_read_lock+0x39/0x180
   __btrfs_read_lock_root_node+0x3a/0x50
   btrfs_search_slot+0x4bd/0x990
   btrfs_find_root+0x45/0x1b0
   btrfs_read_tree_root+0x61/0x100
   btrfs_get_root_ref.part.50+0x143/0x630
   btrfs_uuid_tree_iterate+0x207/0x314
   ? btree_readpage+0x20/0x20
   btrfs_uuid_rescan_kthread+0x12/0x50
   kthread+0x133/0x150
   ? kthread_create_on_node+0x60/0x60
   ret_from_fork+0x1f/0x30

This problem exists because we have two different rescan threads,
btrfs_uuid_scan_kthread which creates the uuid tree, and
btrfs_uuid_tree_iterate that goes through and updates or deletes any out
of date roots.  The problem is they both do things in different order.
btrfs_uuid_scan_kthread() reads the tree_root, and then inserts entries
into the uuid_root.  btrfs_uuid_tree_iterate() scans the uuid_root, but
then does a btrfs_get_fs_root() which can read from the tree_root.

It's actually easy enough to not be holding the path in
btrfs_uuid_scan_kthread() when we add a uuid entry, as we already drop
it further down and re-start the search when we loop.  So simply move
the path release before we add our entry to the uuid tree.

This also fixes a problem where we're holding a path open after we do
btrfs_end_transaction(), which has it's own problems.

CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/volumes.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index ee96c5869f57e..214856c4ccb12 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4462,6 +4462,7 @@ int btrfs_uuid_scan_kthread(void *data)
 			goto skip;
 		}
 update_tree:
+		btrfs_release_path(path);
 		if (!btrfs_is_empty_uuid(root_item.uuid)) {
 			ret = btrfs_uuid_tree_add(trans, root_item.uuid,
 						  BTRFS_UUID_KEY_SUBVOL,
@@ -4486,6 +4487,7 @@ int btrfs_uuid_scan_kthread(void *data)
 		}
 
 skip:
+		btrfs_release_path(path);
 		if (trans) {
 			ret = btrfs_end_transaction(trans);
 			trans = NULL;
@@ -4493,7 +4495,6 @@ int btrfs_uuid_scan_kthread(void *data)
 				break;
 		}
 
-		btrfs_release_path(path);
 		if (key.offset < (u64)-1) {
 			key.offset++;
 		} else if (key.type < BTRFS_ROOT_ITEM_KEY) {
-- 
GitLab


From a48b73eca4ceb9b8a4b97f290a065335dbcd8a04 Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@toxicpanda.com>
Date: Mon, 10 Aug 2020 11:42:27 -0400
Subject: [PATCH 0746/1341] btrfs: fix potential deadlock in the search ioctl

With the conversion of the tree locks to rwsem I got the following
lockdep splat:

  ======================================================
  WARNING: possible circular locking dependency detected
  5.8.0-rc7-00165-g04ec4da5f45f-dirty #922 Not tainted
  ------------------------------------------------------
  compsize/11122 is trying to acquire lock:
  ffff889fabca8768 (&mm->mmap_lock#2){++++}-{3:3}, at: __might_fault+0x3e/0x90

  but task is already holding lock:
  ffff889fe720fe40 (btrfs-fs-00){++++}-{3:3}, at: __btrfs_tree_read_lock+0x39/0x180

  which lock already depends on the new lock.

  the existing dependency chain (in reverse order) is:

  -> #2 (btrfs-fs-00){++++}-{3:3}:
	 down_write_nested+0x3b/0x70
	 __btrfs_tree_lock+0x24/0x120
	 btrfs_search_slot+0x756/0x990
	 btrfs_lookup_inode+0x3a/0xb4
	 __btrfs_update_delayed_inode+0x93/0x270
	 btrfs_async_run_delayed_root+0x168/0x230
	 btrfs_work_helper+0xd4/0x570
	 process_one_work+0x2ad/0x5f0
	 worker_thread+0x3a/0x3d0
	 kthread+0x133/0x150
	 ret_from_fork+0x1f/0x30

  -> #1 (&delayed_node->mutex){+.+.}-{3:3}:
	 __mutex_lock+0x9f/0x930
	 btrfs_delayed_update_inode+0x50/0x440
	 btrfs_update_inode+0x8a/0xf0
	 btrfs_dirty_inode+0x5b/0xd0
	 touch_atime+0xa1/0xd0
	 btrfs_file_mmap+0x3f/0x60
	 mmap_region+0x3a4/0x640
	 do_mmap+0x376/0x580
	 vm_mmap_pgoff+0xd5/0x120
	 ksys_mmap_pgoff+0x193/0x230
	 do_syscall_64+0x50/0x90
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  -> #0 (&mm->mmap_lock#2){++++}-{3:3}:
	 __lock_acquire+0x1272/0x2310
	 lock_acquire+0x9e/0x360
	 __might_fault+0x68/0x90
	 _copy_to_user+0x1e/0x80
	 copy_to_sk.isra.32+0x121/0x300
	 search_ioctl+0x106/0x200
	 btrfs_ioctl_tree_search_v2+0x7b/0xf0
	 btrfs_ioctl+0x106f/0x30a0
	 ksys_ioctl+0x83/0xc0
	 __x64_sys_ioctl+0x16/0x20
	 do_syscall_64+0x50/0x90
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  other info that might help us debug this:

  Chain exists of:
    &mm->mmap_lock#2 --> &delayed_node->mutex --> btrfs-fs-00

   Possible unsafe locking scenario:

	 CPU0                    CPU1
	 ----                    ----
    lock(btrfs-fs-00);
				 lock(&delayed_node->mutex);
				 lock(btrfs-fs-00);
    lock(&mm->mmap_lock#2);

   *** DEADLOCK ***

  1 lock held by compsize/11122:
   #0: ffff889fe720fe40 (btrfs-fs-00){++++}-{3:3}, at: __btrfs_tree_read_lock+0x39/0x180

  stack backtrace:
  CPU: 17 PID: 11122 Comm: compsize Kdump: loaded Not tainted 5.8.0-rc7-00165-g04ec4da5f45f-dirty #922
  Hardware name: Quanta Tioga Pass Single Side 01-0030993006/Tioga Pass Single Side, BIOS F08_3A18 12/20/2018
  Call Trace:
   dump_stack+0x78/0xa0
   check_noncircular+0x165/0x180
   __lock_acquire+0x1272/0x2310
   lock_acquire+0x9e/0x360
   ? __might_fault+0x3e/0x90
   ? find_held_lock+0x72/0x90
   __might_fault+0x68/0x90
   ? __might_fault+0x3e/0x90
   _copy_to_user+0x1e/0x80
   copy_to_sk.isra.32+0x121/0x300
   ? btrfs_search_forward+0x2a6/0x360
   search_ioctl+0x106/0x200
   btrfs_ioctl_tree_search_v2+0x7b/0xf0
   btrfs_ioctl+0x106f/0x30a0
   ? __do_sys_newfstat+0x5a/0x70
   ? ksys_ioctl+0x83/0xc0
   ksys_ioctl+0x83/0xc0
   __x64_sys_ioctl+0x16/0x20
   do_syscall_64+0x50/0x90
   entry_SYSCALL_64_after_hwframe+0x44/0xa9

The problem is we're doing a copy_to_user() while holding tree locks,
which can deadlock if we have to do a page fault for the copy_to_user().
This exists even without my locking changes, so it needs to be fixed.
Rework the search ioctl to do the pre-fault and then
copy_to_user_nofault for the copying.

CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/extent_io.c |  8 ++++----
 fs/btrfs/extent_io.h |  6 +++---
 fs/btrfs/ioctl.c     | 27 ++++++++++++++++++++-------
 3 files changed, 27 insertions(+), 14 deletions(-)

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 617ea38e6fd79..c15ab6c1897fa 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -5653,9 +5653,9 @@ void read_extent_buffer(const struct extent_buffer *eb, void *dstv,
 	}
 }
 
-int read_extent_buffer_to_user(const struct extent_buffer *eb,
-			       void __user *dstv,
-			       unsigned long start, unsigned long len)
+int read_extent_buffer_to_user_nofault(const struct extent_buffer *eb,
+				       void __user *dstv,
+				       unsigned long start, unsigned long len)
 {
 	size_t cur;
 	size_t offset;
@@ -5675,7 +5675,7 @@ int read_extent_buffer_to_user(const struct extent_buffer *eb,
 
 		cur = min(len, (PAGE_SIZE - offset));
 		kaddr = page_address(page);
-		if (copy_to_user(dst, kaddr + offset, cur)) {
+		if (copy_to_user_nofault(dst, kaddr + offset, cur)) {
 			ret = -EFAULT;
 			break;
 		}
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 00a88f2eb5ab6..30794ae58498b 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -241,9 +241,9 @@ int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
 void read_extent_buffer(const struct extent_buffer *eb, void *dst,
 			unsigned long start,
 			unsigned long len);
-int read_extent_buffer_to_user(const struct extent_buffer *eb,
-			       void __user *dst, unsigned long start,
-			       unsigned long len);
+int read_extent_buffer_to_user_nofault(const struct extent_buffer *eb,
+				       void __user *dst, unsigned long start,
+				       unsigned long len);
 void write_extent_buffer_fsid(const struct extent_buffer *eb, const void *src);
 void write_extent_buffer_chunk_tree_uuid(const struct extent_buffer *eb,
 		const void *src);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index bd3511c5ca812..ac45f022b4958 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2086,9 +2086,14 @@ static noinline int copy_to_sk(struct btrfs_path *path,
 		sh.len = item_len;
 		sh.transid = found_transid;
 
-		/* copy search result header */
-		if (copy_to_user(ubuf + *sk_offset, &sh, sizeof(sh))) {
-			ret = -EFAULT;
+		/*
+		 * Copy search result header. If we fault then loop again so we
+		 * can fault in the pages and -EFAULT there if there's a
+		 * problem. Otherwise we'll fault and then copy the buffer in
+		 * properly this next time through
+		 */
+		if (copy_to_user_nofault(ubuf + *sk_offset, &sh, sizeof(sh))) {
+			ret = 0;
 			goto out;
 		}
 
@@ -2096,10 +2101,14 @@ static noinline int copy_to_sk(struct btrfs_path *path,
 
 		if (item_len) {
 			char __user *up = ubuf + *sk_offset;
-			/* copy the item */
-			if (read_extent_buffer_to_user(leaf, up,
-						       item_off, item_len)) {
-				ret = -EFAULT;
+			/*
+			 * Copy the item, same behavior as above, but reset the
+			 * * sk_offset so we copy the full thing again.
+			 */
+			if (read_extent_buffer_to_user_nofault(leaf, up,
+						item_off, item_len)) {
+				ret = 0;
+				*sk_offset -= sizeof(sh);
 				goto out;
 			}
 
@@ -2184,6 +2193,10 @@ static noinline int search_ioctl(struct inode *inode,
 	key.offset = sk->min_offset;
 
 	while (1) {
+		ret = fault_in_pages_writeable(ubuf, *buf_size - sk_offset);
+		if (ret)
+			break;
+
 		ret = btrfs_search_forward(root, &key, path, sk->min_transid);
 		if (ret != 0) {
 			if (ret > 0)
-- 
GitLab


From e89c4a9c8e6ce3a84cab4f342687d3fbbb1234eb Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@toxicpanda.com>
Date: Mon, 10 Aug 2020 11:42:29 -0400
Subject: [PATCH 0747/1341] btrfs: allocate scrub workqueues outside of locks

I got the following lockdep splat while testing:

  ======================================================
  WARNING: possible circular locking dependency detected
  5.8.0-rc7-00172-g021118712e59 #932 Not tainted
  ------------------------------------------------------
  btrfs/229626 is trying to acquire lock:
  ffffffff828513f0 (cpu_hotplug_lock){++++}-{0:0}, at: alloc_workqueue+0x378/0x450

  but task is already holding lock:
  ffff889dd3889518 (&fs_info->scrub_lock){+.+.}-{3:3}, at: btrfs_scrub_dev+0x11c/0x630

  which lock already depends on the new lock.

  the existing dependency chain (in reverse order) is:

  -> #7 (&fs_info->scrub_lock){+.+.}-{3:3}:
	 __mutex_lock+0x9f/0x930
	 btrfs_scrub_dev+0x11c/0x630
	 btrfs_dev_replace_by_ioctl.cold.21+0x10a/0x1d4
	 btrfs_ioctl+0x2799/0x30a0
	 ksys_ioctl+0x83/0xc0
	 __x64_sys_ioctl+0x16/0x20
	 do_syscall_64+0x50/0x90
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  -> #6 (&fs_devs->device_list_mutex){+.+.}-{3:3}:
	 __mutex_lock+0x9f/0x930
	 btrfs_run_dev_stats+0x49/0x480
	 commit_cowonly_roots+0xb5/0x2a0
	 btrfs_commit_transaction+0x516/0xa60
	 sync_filesystem+0x6b/0x90
	 generic_shutdown_super+0x22/0x100
	 kill_anon_super+0xe/0x30
	 btrfs_kill_super+0x12/0x20
	 deactivate_locked_super+0x29/0x60
	 cleanup_mnt+0xb8/0x140
	 task_work_run+0x6d/0xb0
	 __prepare_exit_to_usermode+0x1cc/0x1e0
	 do_syscall_64+0x5c/0x90
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  -> #5 (&fs_info->tree_log_mutex){+.+.}-{3:3}:
	 __mutex_lock+0x9f/0x930
	 btrfs_commit_transaction+0x4bb/0xa60
	 sync_filesystem+0x6b/0x90
	 generic_shutdown_super+0x22/0x100
	 kill_anon_super+0xe/0x30
	 btrfs_kill_super+0x12/0x20
	 deactivate_locked_super+0x29/0x60
	 cleanup_mnt+0xb8/0x140
	 task_work_run+0x6d/0xb0
	 __prepare_exit_to_usermode+0x1cc/0x1e0
	 do_syscall_64+0x5c/0x90
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  -> #4 (&fs_info->reloc_mutex){+.+.}-{3:3}:
	 __mutex_lock+0x9f/0x930
	 btrfs_record_root_in_trans+0x43/0x70
	 start_transaction+0xd1/0x5d0
	 btrfs_dirty_inode+0x42/0xd0
	 touch_atime+0xa1/0xd0
	 btrfs_file_mmap+0x3f/0x60
	 mmap_region+0x3a4/0x640
	 do_mmap+0x376/0x580
	 vm_mmap_pgoff+0xd5/0x120
	 ksys_mmap_pgoff+0x193/0x230
	 do_syscall_64+0x50/0x90
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  -> #3 (&mm->mmap_lock#2){++++}-{3:3}:
	 __might_fault+0x68/0x90
	 _copy_to_user+0x1e/0x80
	 perf_read+0x141/0x2c0
	 vfs_read+0xad/0x1b0
	 ksys_read+0x5f/0xe0
	 do_syscall_64+0x50/0x90
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  -> #2 (&cpuctx_mutex){+.+.}-{3:3}:
	 __mutex_lock+0x9f/0x930
	 perf_event_init_cpu+0x88/0x150
	 perf_event_init+0x1db/0x20b
	 start_kernel+0x3ae/0x53c
	 secondary_startup_64+0xa4/0xb0

  -> #1 (pmus_lock){+.+.}-{3:3}:
	 __mutex_lock+0x9f/0x930
	 perf_event_init_cpu+0x4f/0x150
	 cpuhp_invoke_callback+0xb1/0x900
	 _cpu_up.constprop.26+0x9f/0x130
	 cpu_up+0x7b/0xc0
	 bringup_nonboot_cpus+0x4f/0x60
	 smp_init+0x26/0x71
	 kernel_init_freeable+0x110/0x258
	 kernel_init+0xa/0x103
	 ret_from_fork+0x1f/0x30

  -> #0 (cpu_hotplug_lock){++++}-{0:0}:
	 __lock_acquire+0x1272/0x2310
	 lock_acquire+0x9e/0x360
	 cpus_read_lock+0x39/0xb0
	 alloc_workqueue+0x378/0x450
	 __btrfs_alloc_workqueue+0x15d/0x200
	 btrfs_alloc_workqueue+0x51/0x160
	 scrub_workers_get+0x5a/0x170
	 btrfs_scrub_dev+0x18c/0x630
	 btrfs_dev_replace_by_ioctl.cold.21+0x10a/0x1d4
	 btrfs_ioctl+0x2799/0x30a0
	 ksys_ioctl+0x83/0xc0
	 __x64_sys_ioctl+0x16/0x20
	 do_syscall_64+0x50/0x90
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  other info that might help us debug this:

  Chain exists of:
    cpu_hotplug_lock --> &fs_devs->device_list_mutex --> &fs_info->scrub_lock

   Possible unsafe locking scenario:

	 CPU0                    CPU1
	 ----                    ----
    lock(&fs_info->scrub_lock);
				 lock(&fs_devs->device_list_mutex);
				 lock(&fs_info->scrub_lock);
    lock(cpu_hotplug_lock);

   *** DEADLOCK ***

  2 locks held by btrfs/229626:
   #0: ffff88bfe8bb86e0 (&fs_devs->device_list_mutex){+.+.}-{3:3}, at: btrfs_scrub_dev+0xbd/0x630
   #1: ffff889dd3889518 (&fs_info->scrub_lock){+.+.}-{3:3}, at: btrfs_scrub_dev+0x11c/0x630

  stack backtrace:
  CPU: 15 PID: 229626 Comm: btrfs Kdump: loaded Not tainted 5.8.0-rc7-00172-g021118712e59 #932
  Hardware name: Quanta Tioga Pass Single Side 01-0030993006/Tioga Pass Single Side, BIOS F08_3A18 12/20/2018
  Call Trace:
   dump_stack+0x78/0xa0
   check_noncircular+0x165/0x180
   __lock_acquire+0x1272/0x2310
   lock_acquire+0x9e/0x360
   ? alloc_workqueue+0x378/0x450
   cpus_read_lock+0x39/0xb0
   ? alloc_workqueue+0x378/0x450
   alloc_workqueue+0x378/0x450
   ? rcu_read_lock_sched_held+0x52/0x80
   __btrfs_alloc_workqueue+0x15d/0x200
   btrfs_alloc_workqueue+0x51/0x160
   scrub_workers_get+0x5a/0x170
   btrfs_scrub_dev+0x18c/0x630
   ? start_transaction+0xd1/0x5d0
   btrfs_dev_replace_by_ioctl.cold.21+0x10a/0x1d4
   btrfs_ioctl+0x2799/0x30a0
   ? do_sigaction+0x102/0x250
   ? lockdep_hardirqs_on_prepare+0xca/0x160
   ? _raw_spin_unlock_irq+0x24/0x30
   ? trace_hardirqs_on+0x1c/0xe0
   ? _raw_spin_unlock_irq+0x24/0x30
   ? do_sigaction+0x102/0x250
   ? ksys_ioctl+0x83/0xc0
   ksys_ioctl+0x83/0xc0
   __x64_sys_ioctl+0x16/0x20
   do_syscall_64+0x50/0x90
   entry_SYSCALL_64_after_hwframe+0x44/0xa9

This happens because we're allocating the scrub workqueues under the
scrub and device list mutex, which brings in a whole host of other
dependencies.

Because the work queue allocation is done with GFP_KERNEL, it can
trigger reclaim, which can lead to a transaction commit, which in turns
needs the device_list_mutex, it can lead to a deadlock. A different
problem for which this fix is a solution.

Fix this by moving the actual allocation outside of the
scrub lock, and then only take the lock once we're ready to actually
assign them to the fs_info.  We'll now have to cleanup the workqueues in
a few more places, so I've added a helper to do the refcount dance to
safely free the workqueues.

CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/scrub.c | 122 +++++++++++++++++++++++++++--------------------
 1 file changed, 70 insertions(+), 52 deletions(-)

diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 5a6cb9db512eb..354ab9985a342 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -3716,50 +3716,84 @@ static noinline_for_stack int scrub_supers(struct scrub_ctx *sctx,
 	return 0;
 }
 
+static void scrub_workers_put(struct btrfs_fs_info *fs_info)
+{
+	if (refcount_dec_and_mutex_lock(&fs_info->scrub_workers_refcnt,
+					&fs_info->scrub_lock)) {
+		struct btrfs_workqueue *scrub_workers = NULL;
+		struct btrfs_workqueue *scrub_wr_comp = NULL;
+		struct btrfs_workqueue *scrub_parity = NULL;
+
+		scrub_workers = fs_info->scrub_workers;
+		scrub_wr_comp = fs_info->scrub_wr_completion_workers;
+		scrub_parity = fs_info->scrub_parity_workers;
+
+		fs_info->scrub_workers = NULL;
+		fs_info->scrub_wr_completion_workers = NULL;
+		fs_info->scrub_parity_workers = NULL;
+		mutex_unlock(&fs_info->scrub_lock);
+
+		btrfs_destroy_workqueue(scrub_workers);
+		btrfs_destroy_workqueue(scrub_wr_comp);
+		btrfs_destroy_workqueue(scrub_parity);
+	}
+}
+
 /*
  * get a reference count on fs_info->scrub_workers. start worker if necessary
  */
 static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,
 						int is_dev_replace)
 {
+	struct btrfs_workqueue *scrub_workers = NULL;
+	struct btrfs_workqueue *scrub_wr_comp = NULL;
+	struct btrfs_workqueue *scrub_parity = NULL;
 	unsigned int flags = WQ_FREEZABLE | WQ_UNBOUND;
 	int max_active = fs_info->thread_pool_size;
+	int ret = -ENOMEM;
 
-	lockdep_assert_held(&fs_info->scrub_lock);
+	if (refcount_inc_not_zero(&fs_info->scrub_workers_refcnt))
+		return 0;
 
-	if (refcount_read(&fs_info->scrub_workers_refcnt) == 0) {
-		ASSERT(fs_info->scrub_workers == NULL);
-		fs_info->scrub_workers = btrfs_alloc_workqueue(fs_info, "scrub",
-				flags, is_dev_replace ? 1 : max_active, 4);
-		if (!fs_info->scrub_workers)
-			goto fail_scrub_workers;
-
-		ASSERT(fs_info->scrub_wr_completion_workers == NULL);
-		fs_info->scrub_wr_completion_workers =
-			btrfs_alloc_workqueue(fs_info, "scrubwrc", flags,
-					      max_active, 2);
-		if (!fs_info->scrub_wr_completion_workers)
-			goto fail_scrub_wr_completion_workers;
+	scrub_workers = btrfs_alloc_workqueue(fs_info, "scrub", flags,
+					      is_dev_replace ? 1 : max_active, 4);
+	if (!scrub_workers)
+		goto fail_scrub_workers;
 
-		ASSERT(fs_info->scrub_parity_workers == NULL);
-		fs_info->scrub_parity_workers =
-			btrfs_alloc_workqueue(fs_info, "scrubparity", flags,
+	scrub_wr_comp = btrfs_alloc_workqueue(fs_info, "scrubwrc", flags,
 					      max_active, 2);
-		if (!fs_info->scrub_parity_workers)
-			goto fail_scrub_parity_workers;
+	if (!scrub_wr_comp)
+		goto fail_scrub_wr_completion_workers;
 
+	scrub_parity = btrfs_alloc_workqueue(fs_info, "scrubparity", flags,
+					     max_active, 2);
+	if (!scrub_parity)
+		goto fail_scrub_parity_workers;
+
+	mutex_lock(&fs_info->scrub_lock);
+	if (refcount_read(&fs_info->scrub_workers_refcnt) == 0) {
+		ASSERT(fs_info->scrub_workers == NULL &&
+		       fs_info->scrub_wr_completion_workers == NULL &&
+		       fs_info->scrub_parity_workers == NULL);
+		fs_info->scrub_workers = scrub_workers;
+		fs_info->scrub_wr_completion_workers = scrub_wr_comp;
+		fs_info->scrub_parity_workers = scrub_parity;
 		refcount_set(&fs_info->scrub_workers_refcnt, 1);
-	} else {
-		refcount_inc(&fs_info->scrub_workers_refcnt);
+		mutex_unlock(&fs_info->scrub_lock);
+		return 0;
 	}
-	return 0;
+	/* Other thread raced in and created the workers for us */
+	refcount_inc(&fs_info->scrub_workers_refcnt);
+	mutex_unlock(&fs_info->scrub_lock);
 
+	ret = 0;
+	btrfs_destroy_workqueue(scrub_parity);
 fail_scrub_parity_workers:
-	btrfs_destroy_workqueue(fs_info->scrub_wr_completion_workers);
+	btrfs_destroy_workqueue(scrub_wr_comp);
 fail_scrub_wr_completion_workers:
-	btrfs_destroy_workqueue(fs_info->scrub_workers);
+	btrfs_destroy_workqueue(scrub_workers);
 fail_scrub_workers:
-	return -ENOMEM;
+	return ret;
 }
 
 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
@@ -3770,9 +3804,6 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 	int ret;
 	struct btrfs_device *dev;
 	unsigned int nofs_flag;
-	struct btrfs_workqueue *scrub_workers = NULL;
-	struct btrfs_workqueue *scrub_wr_comp = NULL;
-	struct btrfs_workqueue *scrub_parity = NULL;
 
 	if (btrfs_fs_closing(fs_info))
 		return -EAGAIN;
@@ -3819,13 +3850,17 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 	if (IS_ERR(sctx))
 		return PTR_ERR(sctx);
 
+	ret = scrub_workers_get(fs_info, is_dev_replace);
+	if (ret)
+		goto out_free_ctx;
+
 	mutex_lock(&fs_info->fs_devices->device_list_mutex);
 	dev = btrfs_find_device(fs_info->fs_devices, devid, NULL, NULL, true);
 	if (!dev || (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state) &&
 		     !is_dev_replace)) {
 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);
 		ret = -ENODEV;
-		goto out_free_ctx;
+		goto out;
 	}
 
 	if (!is_dev_replace && !readonly &&
@@ -3834,7 +3869,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 		btrfs_err_in_rcu(fs_info, "scrub: device %s is not writable",
 				rcu_str_deref(dev->name));
 		ret = -EROFS;
-		goto out_free_ctx;
+		goto out;
 	}
 
 	mutex_lock(&fs_info->scrub_lock);
@@ -3843,7 +3878,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 		mutex_unlock(&fs_info->scrub_lock);
 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);
 		ret = -EIO;
-		goto out_free_ctx;
+		goto out;
 	}
 
 	down_read(&fs_info->dev_replace.rwsem);
@@ -3854,17 +3889,10 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 		mutex_unlock(&fs_info->scrub_lock);
 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);
 		ret = -EINPROGRESS;
-		goto out_free_ctx;
+		goto out;
 	}
 	up_read(&fs_info->dev_replace.rwsem);
 
-	ret = scrub_workers_get(fs_info, is_dev_replace);
-	if (ret) {
-		mutex_unlock(&fs_info->scrub_lock);
-		mutex_unlock(&fs_info->fs_devices->device_list_mutex);
-		goto out_free_ctx;
-	}
-
 	sctx->readonly = readonly;
 	dev->scrub_ctx = sctx;
 	mutex_unlock(&fs_info->fs_devices->device_list_mutex);
@@ -3917,24 +3945,14 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 
 	mutex_lock(&fs_info->scrub_lock);
 	dev->scrub_ctx = NULL;
-	if (refcount_dec_and_test(&fs_info->scrub_workers_refcnt)) {
-		scrub_workers = fs_info->scrub_workers;
-		scrub_wr_comp = fs_info->scrub_wr_completion_workers;
-		scrub_parity = fs_info->scrub_parity_workers;
-
-		fs_info->scrub_workers = NULL;
-		fs_info->scrub_wr_completion_workers = NULL;
-		fs_info->scrub_parity_workers = NULL;
-	}
 	mutex_unlock(&fs_info->scrub_lock);
 
-	btrfs_destroy_workqueue(scrub_workers);
-	btrfs_destroy_workqueue(scrub_wr_comp);
-	btrfs_destroy_workqueue(scrub_parity);
+	scrub_workers_put(fs_info);
 	scrub_put_ctx(sctx);
 
 	return ret;
-
+out:
+	scrub_workers_put(fs_info);
 out_free_ctx:
 	scrub_free_ctx(sctx);
 
-- 
GitLab


From ad24466588ab7d7c879053c5afd919b0c555fec0 Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@toxicpanda.com>
Date: Mon, 10 Aug 2020 11:42:30 -0400
Subject: [PATCH 0748/1341] btrfs: set the correct lockdep class for new nodes

When flipping over to the rw_semaphore I noticed I'd get a lockdep splat
in replace_path(), which is weird because we're swapping the reloc root
with the actual target root.  Turns out this is because we're using the
root->root_key.objectid as the root id for the newly allocated tree
block when setting the lockdep class, however we need to be using the
actual owner of this new block, which is saved in owner.

The affected path is through btrfs_copy_root as all other callers of
btrfs_alloc_tree_block (which calls init_new_buffer) have root_objectid
== root->root_key.objectid .

CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/extent-tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 5871ef78edbac..e9eedc053fc52 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -4527,7 +4527,7 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 		return ERR_PTR(-EUCLEAN);
 	}
 
-	btrfs_set_buffer_lockdep_class(root->root_key.objectid, buf, level);
+	btrfs_set_buffer_lockdep_class(owner, buf, level);
 	btrfs_tree_lock(buf);
 	btrfs_clean_tree_block(buf);
 	clear_bit(EXTENT_BUFFER_STALE, &buf->bflags);
-- 
GitLab


From d3beaa253fd6fa40b8b18a216398e6e5376a9d21 Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@toxicpanda.com>
Date: Mon, 10 Aug 2020 11:42:31 -0400
Subject: [PATCH 0749/1341] btrfs: set the lockdep class for log tree extent
 buffers

These are special extent buffers that get rewound in order to lookup
the state of the tree at a specific point in time.  As such they do not
go through the normal initialization paths that set their lockdep class,
so handle them appropriately when they are created and before they are
locked.

CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/ctree.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index cd1cd673bc0bf..cd392da69b819 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1297,6 +1297,8 @@ tree_mod_log_rewind(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 	btrfs_tree_read_unlock_blocking(eb);
 	free_extent_buffer(eb);
 
+	btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb_rewin),
+				       eb_rewin, btrfs_header_level(eb_rewin));
 	btrfs_tree_read_lock(eb_rewin);
 	__tree_mod_log_rewind(fs_info, eb_rewin, time_seq, tm);
 	WARN_ON(btrfs_header_nritems(eb_rewin) >
@@ -1370,7 +1372,6 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
 
 	if (!eb)
 		return NULL;
-	btrfs_tree_read_lock(eb);
 	if (old_root) {
 		btrfs_set_header_bytenr(eb, eb->start);
 		btrfs_set_header_backref_rev(eb, BTRFS_MIXED_BACKREF_REV);
@@ -1378,6 +1379,9 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
 		btrfs_set_header_level(eb, old_root->level);
 		btrfs_set_header_generation(eb, old_generation);
 	}
+	btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb), eb,
+				       btrfs_header_level(eb));
+	btrfs_tree_read_lock(eb);
 	if (tm)
 		__tree_mod_log_rewind(fs_info, eb, time_seq, tm);
 	else
-- 
GitLab


From d862060a4b43479887ae8e2c0b74a58c4e27e5f3 Mon Sep 17 00:00:00 2001
From: Kamal Heib <kamalheib1@gmail.com>
Date: Tue, 25 Aug 2020 18:17:25 +0300
Subject: [PATCH 0750/1341] RDMA/rxe: Fix panic when calling
 kmem_cache_create()

To avoid the following kernel panic when calling kmem_cache_create() with
a NULL pointer from pool_cache(), Block the rxe_param_set_add() from
running if the rdma_rxe module is not initialized.

 BUG: unable to handle kernel NULL pointer dereference at 000000000000000b
 PGD 0 P4D 0
 Oops: 0000 [#1] SMP NOPTI
 CPU: 4 PID: 8512 Comm: modprobe Kdump: loaded Not tainted 4.18.0-231.el8.x86_64 #1
 Hardware name: HPE ProLiant DL385 Gen10/ProLiant DL385 Gen10, BIOS A40 10/02/2018
 RIP: 0010:kmem_cache_alloc+0xd1/0x1b0
 Code: 8b 57 18 45 8b 77 1c 48 8b 5c 24 30 0f 1f 44 00 00 5b 48 89 e8 5d 41 5c 41 5d 41 5e 41 5f c3 81 e3 00 00 10 00 75 0e 4d 89 fe <41> f6 47 0b 04 0f 84 6c ff ff ff 4c 89 ff e8 cc da 01 00 49 89 c6
 RSP: 0018:ffffa2b8c773f9d0 EFLAGS: 00010246
 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000005
 RDX: 0000000000000004 RSI: 00000000006080c0 RDI: 0000000000000000
 RBP: ffff8ea0a8634fd0 R08: ffffa2b8c773f988 R09: 00000000006000c0
 R10: 0000000000000000 R11: 0000000000000230 R12: 00000000006080c0
 R13: ffffffffc0a97fc8 R14: 0000000000000000 R15: 0000000000000000
 FS:  00007f9138ed9740(0000) GS:ffff8ea4ae800000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 000000000000000b CR3: 000000046d59a000 CR4: 00000000003406e0
 Call Trace:
  rxe_alloc+0xc8/0x160 [rdma_rxe]
  rxe_get_dma_mr+0x25/0xb0 [rdma_rxe]
  __ib_alloc_pd+0xcb/0x160 [ib_core]
  ib_mad_init_device+0x296/0x8b0 [ib_core]
  add_client_context+0x11a/0x160 [ib_core]
  enable_device_and_get+0xdc/0x1d0 [ib_core]
  ib_register_device+0x572/0x6b0 [ib_core]
  ? crypto_create_tfm+0x32/0xe0
  ? crypto_create_tfm+0x7a/0xe0
  ? crypto_alloc_tfm+0x58/0xf0
  rxe_register_device+0x19d/0x1c0 [rdma_rxe]
  rxe_net_add+0x3d/0x70 [rdma_rxe]
  ? dev_get_by_name_rcu+0x73/0x90
  rxe_param_set_add+0xaf/0xc0 [rdma_rxe]
  parse_args+0x179/0x370
  ? ref_module+0x1b0/0x1b0
  load_module+0x135e/0x17e0
  ? ref_module+0x1b0/0x1b0
  ? __do_sys_init_module+0x13b/0x180
  __do_sys_init_module+0x13b/0x180
  do_syscall_64+0x5b/0x1a0
  entry_SYSCALL_64_after_hwframe+0x65/0xca
 RIP: 0033:0x7f9137ed296e

This can be triggered if a user tries to use the 'module option' which is
not actually a real module option but some idiotic (and thankfully no
obsolete) sysfs interface.

Fixes: 8700e3e7c485 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20200825151725.254046-1-kamalheib1@gmail.com
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/sw/rxe/rxe.c       | 4 ++++
 drivers/infiniband/sw/rxe/rxe.h       | 2 ++
 drivers/infiniband/sw/rxe/rxe_sysfs.c | 5 +++++
 3 files changed, 11 insertions(+)

diff --git a/drivers/infiniband/sw/rxe/rxe.c b/drivers/infiniband/sw/rxe/rxe.c
index 907203afbd994..77f2c7cd1216c 100644
--- a/drivers/infiniband/sw/rxe/rxe.c
+++ b/drivers/infiniband/sw/rxe/rxe.c
@@ -40,6 +40,8 @@ MODULE_AUTHOR("Bob Pearson, Frank Zago, John Groves, Kamal Heib");
 MODULE_DESCRIPTION("Soft RDMA transport");
 MODULE_LICENSE("Dual BSD/GPL");
 
+bool rxe_initialized;
+
 /* free resources for a rxe device all objects created for this device must
  * have been destroyed
  */
@@ -315,6 +317,7 @@ static int __init rxe_module_init(void)
 		return err;
 
 	rdma_link_register(&rxe_link_ops);
+	rxe_initialized = true;
 	pr_info("loaded\n");
 	return 0;
 }
@@ -326,6 +329,7 @@ static void __exit rxe_module_exit(void)
 	rxe_net_exit();
 	rxe_cache_exit();
 
+	rxe_initialized = false;
 	pr_info("unloaded\n");
 }
 
diff --git a/drivers/infiniband/sw/rxe/rxe.h b/drivers/infiniband/sw/rxe/rxe.h
index fb07eed9e4028..cae1b0a24c850 100644
--- a/drivers/infiniband/sw/rxe/rxe.h
+++ b/drivers/infiniband/sw/rxe/rxe.h
@@ -67,6 +67,8 @@
 
 #define RXE_ROCE_V2_SPORT		(0xc000)
 
+extern bool rxe_initialized;
+
 static inline u32 rxe_crc32(struct rxe_dev *rxe,
 			    u32 crc, void *next, size_t len)
 {
diff --git a/drivers/infiniband/sw/rxe/rxe_sysfs.c b/drivers/infiniband/sw/rxe/rxe_sysfs.c
index ccda5f5a3bc0a..2af31d421bfc3 100644
--- a/drivers/infiniband/sw/rxe/rxe_sysfs.c
+++ b/drivers/infiniband/sw/rxe/rxe_sysfs.c
@@ -61,6 +61,11 @@ static int rxe_param_set_add(const char *val, const struct kernel_param *kp)
 	struct net_device *ndev;
 	struct rxe_dev *exists;
 
+	if (!rxe_initialized) {
+		pr_err("Module parameters are not supported, use rdma link add or rxe_cfg\n");
+		return -EAGAIN;
+	}
+
 	len = sanitize_arg(val, intf, sizeof(intf));
 	if (!len) {
 		pr_err("add: invalid interface name\n");
-- 
GitLab


From f96d6960abbc52e26ad124e69e6815283d3e1674 Mon Sep 17 00:00:00 2001
From: Qu Wenruo <wqu@suse.com>
Date: Tue, 25 Aug 2020 21:42:51 +0800
Subject: [PATCH 0751/1341] btrfs: tree-checker: fix the error message for
 transid error

The error message for inode transid is the same as for inode generation,
which makes us unable to detect the real problem.

Reported-by: Tyler Richmond <t.d.richmond@gmail.com>
Fixes: 496245cac57e ("btrfs: tree-checker: Verify inode item")
CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Marcos Paulo de Souza <mpdesouza@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/tree-checker.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index 517b44300a05c..7b1fee630f978 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -984,7 +984,7 @@ static int check_inode_item(struct extent_buffer *leaf,
 	/* Note for ROOT_TREE_DIR_ITEM, mkfs could set its transid 0 */
 	if (btrfs_inode_transid(leaf, iitem) > super_gen + 1) {
 		inode_item_err(leaf, slot,
-			"invalid inode generation: has %llu expect [0, %llu]",
+			"invalid inode transid: has %llu expect [0, %llu]",
 			       btrfs_inode_transid(leaf, iitem), super_gen + 1);
 		return -EUCLEAN;
 	}
-- 
GitLab


From ec78b3bd66bc9a015505df0ef0eb153d9e64b03b Mon Sep 17 00:00:00 2001
From: Mark Bloch <markb@mellanox.com>
Date: Mon, 24 Aug 2020 14:02:29 +0300
Subject: [PATCH 0752/1341] RDMA/mlx4: Read pkey table length instead of
 hardcoded value

If the pkey_table is not available (which is the case when RoCE is not
supported), the cited commit caused a regression where mlx4_devices
without RoCE are not created.

Fix this by returning a pkey table length of zero in procedure
eth_link_query_port() if the pkey-table length reported by the device is
zero.

Link: https://lore.kernel.org/r/20200824110229.1094376-1-leon@kernel.org
Cc: <stable@vger.kernel.org>
Fixes: 1901b91f9982 ("IB/core: Fix potential NULL pointer dereference in pkey cache")
Fixes: fa417f7b520e ("IB/mlx4: Add support for IBoE")
Signed-off-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/mlx4/main.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 5e7910a517dae..bd4f975e7f9ac 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -784,7 +784,8 @@ static int eth_link_query_port(struct ib_device *ibdev, u8 port,
 	props->ip_gids = true;
 	props->gid_tbl_len	= mdev->dev->caps.gid_table_len[port];
 	props->max_msg_sz	= mdev->dev->caps.max_msg_sz;
-	props->pkey_tbl_len	= 1;
+	if (mdev->dev->caps.pkey_table_len[port])
+		props->pkey_tbl_len = 1;
 	props->max_mtu		= IB_MTU_4096;
 	props->max_vl_num	= 2;
 	props->state		= IB_PORT_DOWN;
-- 
GitLab


From 2d0e60ee322d512fa6bc62d23a6760b39a380847 Mon Sep 17 00:00:00 2001
From: Selvin Xavier <selvin.xavier@broadcom.com>
Date: Mon, 24 Aug 2020 11:14:32 -0700
Subject: [PATCH 0753/1341] RDMA/bnxt_re: Do not report transparent vlan from
 QP1

QP1 Rx CQE reports transparent VLAN ID in the completion and this is used
while reporting the completion for received MAD packet. Check if the vlan
id is configured before reporting it in the work completion.

Fixes: 84511455ac5b ("RDMA/bnxt_re: report vlan_id and sl in qp1 recv completion")
Link: https://lore.kernel.org/r/1598292876-26529-3-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/bnxt_re/ib_verbs.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 3f18efc0c2974..62eb62c8603a5 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -3264,6 +3264,19 @@ static void bnxt_re_process_res_rawqp1_wc(struct ib_wc *wc,
 	wc->wc_flags |= IB_WC_GRH;
 }
 
+static bool bnxt_re_check_if_vlan_valid(struct bnxt_re_dev *rdev,
+					u16 vlan_id)
+{
+	/*
+	 * Check if the vlan is configured in the host.  If not configured, it
+	 * can be a transparent VLAN. So dont report the vlan id.
+	 */
+	if (!__vlan_find_dev_deep_rcu(rdev->netdev,
+				      htons(ETH_P_8021Q), vlan_id))
+		return false;
+	return true;
+}
+
 static bool bnxt_re_is_vlan_pkt(struct bnxt_qplib_cqe *orig_cqe,
 				u16 *vid, u8 *sl)
 {
@@ -3332,9 +3345,11 @@ static void bnxt_re_process_res_shadow_qp_wc(struct bnxt_re_qp *gsi_sqp,
 	wc->src_qp = orig_cqe->src_qp;
 	memcpy(wc->smac, orig_cqe->smac, ETH_ALEN);
 	if (bnxt_re_is_vlan_pkt(orig_cqe, &vlan_id, &sl)) {
-		wc->vlan_id = vlan_id;
-		wc->sl = sl;
-		wc->wc_flags |= IB_WC_WITH_VLAN;
+		if (bnxt_re_check_if_vlan_valid(rdev, vlan_id)) {
+			wc->vlan_id = vlan_id;
+			wc->sl = sl;
+			wc->wc_flags |= IB_WC_WITH_VLAN;
+		}
 	}
 	wc->port_num = 1;
 	wc->vendor_err = orig_cqe->status;
-- 
GitLab


From 84cf229f4001c1216afc3e4c7f05e1620a0dd4bc Mon Sep 17 00:00:00 2001
From: Selvin Xavier <selvin.xavier@broadcom.com>
Date: Mon, 24 Aug 2020 11:14:33 -0700
Subject: [PATCH 0754/1341] RDMA/bnxt_re: Fix the qp table indexing

qp->id can be a value outside the max number of qp. Indexing the qp table
with the id can cause out of bounds crash. So changing the qp table
indexing by (qp->id % max_qp -1).

Allocating one extra entry for QP1. Some adapters create one more than the
max_qp requested to accommodate QP1.  If the qp->id is 1, store the
inforamtion in the last entry of the qp table.

Fixes: f218d67ef004 ("RDMA/bnxt_re: Allow posting when QPs are in error")
Link: https://lore.kernel.org/r/1598292876-26529-4-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/bnxt_re/qplib_fp.c   | 22 ++++++++++++++--------
 drivers/infiniband/hw/bnxt_re/qplib_rcfw.c | 10 ++++++----
 drivers/infiniband/hw/bnxt_re/qplib_rcfw.h |  5 +++++
 3 files changed, 25 insertions(+), 12 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index 117b42349a283..3535130a9e2dc 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -818,6 +818,7 @@ int bnxt_qplib_create_qp1(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
 	u16 cmd_flags = 0;
 	u32 qp_flags = 0;
 	u8 pg_sz_lvl;
+	u32 tbl_indx;
 	int rc;
 
 	RCFW_CMD_PREP(req, CREATE_QP1, cmd_flags);
@@ -907,8 +908,9 @@ int bnxt_qplib_create_qp1(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
 		rq->dbinfo.db = qp->dpi->dbr;
 		rq->dbinfo.max_slot = bnxt_qplib_set_rq_max_slot(rq->wqe_size);
 	}
-	rcfw->qp_tbl[qp->id].qp_id = qp->id;
-	rcfw->qp_tbl[qp->id].qp_handle = (void *)qp;
+	tbl_indx = map_qp_id_to_tbl_indx(qp->id, rcfw);
+	rcfw->qp_tbl[tbl_indx].qp_id = qp->id;
+	rcfw->qp_tbl[tbl_indx].qp_handle = (void *)qp;
 
 	return 0;
 
@@ -959,6 +961,7 @@ int bnxt_qplib_create_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
 	u16 cmd_flags = 0;
 	u32 qp_flags = 0;
 	u8 pg_sz_lvl;
+	u32 tbl_indx;
 	u16 nsge;
 
 	RCFW_CMD_PREP(req, CREATE_QP, cmd_flags);
@@ -1111,8 +1114,9 @@ int bnxt_qplib_create_qp(struct bnxt_qplib_res *res, struct bnxt_qplib_qp *qp)
 		rq->dbinfo.db = qp->dpi->dbr;
 		rq->dbinfo.max_slot = bnxt_qplib_set_rq_max_slot(rq->wqe_size);
 	}
-	rcfw->qp_tbl[qp->id].qp_id = qp->id;
-	rcfw->qp_tbl[qp->id].qp_handle = (void *)qp;
+	tbl_indx = map_qp_id_to_tbl_indx(qp->id, rcfw);
+	rcfw->qp_tbl[tbl_indx].qp_id = qp->id;
+	rcfw->qp_tbl[tbl_indx].qp_handle = (void *)qp;
 
 	return 0;
 fail:
@@ -1457,10 +1461,12 @@ int bnxt_qplib_destroy_qp(struct bnxt_qplib_res *res,
 	struct cmdq_destroy_qp req;
 	struct creq_destroy_qp_resp resp;
 	u16 cmd_flags = 0;
+	u32 tbl_indx;
 	int rc;
 
-	rcfw->qp_tbl[qp->id].qp_id = BNXT_QPLIB_QP_ID_INVALID;
-	rcfw->qp_tbl[qp->id].qp_handle = NULL;
+	tbl_indx = map_qp_id_to_tbl_indx(qp->id, rcfw);
+	rcfw->qp_tbl[tbl_indx].qp_id = BNXT_QPLIB_QP_ID_INVALID;
+	rcfw->qp_tbl[tbl_indx].qp_handle = NULL;
 
 	RCFW_CMD_PREP(req, DESTROY_QP, cmd_flags);
 
@@ -1468,8 +1474,8 @@ int bnxt_qplib_destroy_qp(struct bnxt_qplib_res *res,
 	rc = bnxt_qplib_rcfw_send_message(rcfw, (void *)&req,
 					  (void *)&resp, NULL, 0);
 	if (rc) {
-		rcfw->qp_tbl[qp->id].qp_id = qp->id;
-		rcfw->qp_tbl[qp->id].qp_handle = qp;
+		rcfw->qp_tbl[tbl_indx].qp_id = qp->id;
+		rcfw->qp_tbl[tbl_indx].qp_handle = qp;
 		return rc;
 	}
 
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
index 4e211162acee2..f7736e34ac64c 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.c
@@ -307,14 +307,15 @@ static int bnxt_qplib_process_qp_event(struct bnxt_qplib_rcfw *rcfw,
 	__le16  mcookie;
 	u16 cookie;
 	int rc = 0;
-	u32 qp_id;
+	u32 qp_id, tbl_indx;
 
 	pdev = rcfw->pdev;
 	switch (qp_event->event) {
 	case CREQ_QP_EVENT_EVENT_QP_ERROR_NOTIFICATION:
 		err_event = (struct creq_qp_error_notification *)qp_event;
 		qp_id = le32_to_cpu(err_event->xid);
-		qp = rcfw->qp_tbl[qp_id].qp_handle;
+		tbl_indx = map_qp_id_to_tbl_indx(qp_id, rcfw);
+		qp = rcfw->qp_tbl[tbl_indx].qp_handle;
 		dev_dbg(&pdev->dev, "Received QP error notification\n");
 		dev_dbg(&pdev->dev,
 			"qpid 0x%x, req_err=0x%x, resp_err=0x%x\n",
@@ -615,8 +616,9 @@ int bnxt_qplib_alloc_rcfw_channel(struct bnxt_qplib_res *res,
 
 	cmdq->bmap_size = bmap_size;
 
-	rcfw->qp_tbl_size = qp_tbl_sz;
-	rcfw->qp_tbl = kcalloc(qp_tbl_sz, sizeof(struct bnxt_qplib_qp_node),
+	/* Allocate one extra to hold the QP1 entries */
+	rcfw->qp_tbl_size = qp_tbl_sz + 1;
+	rcfw->qp_tbl = kcalloc(rcfw->qp_tbl_size, sizeof(struct bnxt_qplib_qp_node),
 			       GFP_KERNEL);
 	if (!rcfw->qp_tbl)
 		goto fail;
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
index 157387636d004..5f2f0a5a3560f 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_rcfw.h
@@ -216,4 +216,9 @@ int bnxt_qplib_deinit_rcfw(struct bnxt_qplib_rcfw *rcfw);
 int bnxt_qplib_init_rcfw(struct bnxt_qplib_rcfw *rcfw,
 			 struct bnxt_qplib_ctx *ctx, int is_virtfn);
 void bnxt_qplib_mark_qp_error(void *qp_handle);
+static inline u32 map_qp_id_to_tbl_indx(u32 qid, struct bnxt_qplib_rcfw *rcfw)
+{
+	/* Last index of the qp_tbl is for QP1 ie. qp_tbl_size - 1*/
+	return (qid == 1) ? rcfw->qp_tbl_size - 1 : qid % rcfw->qp_tbl_size - 2;
+}
 #endif /* __BNXT_QPLIB_RCFW_H__ */
-- 
GitLab


From f86b31c6a28f06eed3f6d9dc958079853b0792f1 Mon Sep 17 00:00:00 2001
From: Naresh Kumar PBS <nareshkumar.pbs@broadcom.com>
Date: Mon, 24 Aug 2020 11:14:34 -0700
Subject: [PATCH 0755/1341] RDMA/bnxt_re: Static NQ depth allocation

At first, driver allocates memory for NQ based on qplib_ctx->cq_count and
qplib_ctx->srqc_count.  Later when creating ring, it uses a static value
of 128K -1.

Fixing this with a static value for now.

Fixes: b08fe048a69d ("RDMA/bnxt_re: Refactor net ring allocation function")
Link: https://lore.kernel.org/r/1598292876-26529-5-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Naresh Kumar PBS <nareshkumar.pbs@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/bnxt_re/main.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index 17ac8b7c57104..13bbeb42794f9 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -1037,8 +1037,7 @@ static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
 		struct bnxt_qplib_nq *nq;
 
 		nq = &rdev->nq[i];
-		nq->hwq.max_elements = (qplib_ctx->cq_count +
-					qplib_ctx->srqc_count + 2);
+		nq->hwq.max_elements = BNXT_QPLIB_NQE_MAX_CNT;
 		rc = bnxt_qplib_alloc_nq(&rdev->qplib_res, &rdev->nq[i]);
 		if (rc) {
 			ibdev_err(&rdev->ibdev, "Alloc Failed NQ%d rc:%#x",
-- 
GitLab


From 847b97887ed4569968d5b9a740f2334abca9f99a Mon Sep 17 00:00:00 2001
From: Naresh Kumar PBS <nareshkumar.pbs@broadcom.com>
Date: Mon, 24 Aug 2020 11:14:35 -0700
Subject: [PATCH 0756/1341] RDMA/bnxt_re: Restrict the max_gids to 256

Some adapters report more than 256 gid entries. Restrict it to 256 for
now.

Fixes: 1ac5a4047975("RDMA/bnxt_re: Add bnxt_re RoCE driver")
Link: https://lore.kernel.org/r/1598292876-26529-6-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Naresh Kumar PBS <nareshkumar.pbs@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/bnxt_re/qplib_sp.c | 2 +-
 drivers/infiniband/hw/bnxt_re/qplib_sp.h | 1 +
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.c b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
index 4cd475ea97a24..64d44f51db4b6 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.c
@@ -149,7 +149,7 @@ int bnxt_qplib_get_dev_attr(struct bnxt_qplib_rcfw *rcfw,
 	attr->max_inline_data = le32_to_cpu(sb->max_inline_data);
 	attr->l2_db_size = (sb->l2_db_space_size + 1) *
 			    (0x01 << RCFW_DBR_BASE_PAGE_SHIFT);
-	attr->max_sgid = le32_to_cpu(sb->max_gid);
+	attr->max_sgid = BNXT_QPLIB_NUM_GIDS_SUPPORTED;
 
 	bnxt_qplib_query_version(rcfw, attr->fw_ver);
 
diff --git a/drivers/infiniband/hw/bnxt_re/qplib_sp.h b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
index 6404f0da10517..967890cd81f27 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_sp.h
+++ b/drivers/infiniband/hw/bnxt_re/qplib_sp.h
@@ -47,6 +47,7 @@
 struct bnxt_qplib_dev_attr {
 #define FW_VER_ARR_LEN			4
 	u8				fw_ver[FW_VER_ARR_LEN];
+#define BNXT_QPLIB_NUM_GIDS_SUPPORTED	256
 	u16				max_sgid;
 	u16				max_mrw;
 	u32				max_qp;
-- 
GitLab


From 934d0ac9a64d21523e3ad03ea4098da7826bc788 Mon Sep 17 00:00:00 2001
From: Naresh Kumar PBS <nareshkumar.pbs@broadcom.com>
Date: Mon, 24 Aug 2020 11:14:36 -0700
Subject: [PATCH 0757/1341] RDMA/bnxt_re: Fix driver crash on unaligned PSN
 entry address

When computing the first psn entry, driver checks for page alignment. If
this address is not page aligned,it attempts to compute the offset in that
page for later use by using ALIGN macro. ALIGN macro does not return
offset bytes but the requested aligned address and hence cannot be used
directly to store as offset.  Since driver was using the address itself
instead of offset, it resulted in invalid address when filling the psn
buffer.

Fixed driver to use PAGE_MASK macro to calculate the offset.

Fixes: fddcbbb02af4 ("RDMA/bnxt_re: Simplify obtaining queue entry from hw ring")
Link: https://lore.kernel.org/r/1598292876-26529-7-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Naresh Kumar PBS <nareshkumar.pbs@broadcom.com>
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/bnxt_re/qplib_fp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
index 3535130a9e2dc..9f90cfec4bbb7 100644
--- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c
+++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c
@@ -937,10 +937,10 @@ static void bnxt_qplib_init_psn_ptr(struct bnxt_qplib_qp *qp, int size)
 
 	sq = &qp->sq;
 	hwq = &sq->hwq;
+	/* First psn entry */
 	fpsne = (u64)bnxt_qplib_get_qe(hwq, hwq->depth, &psn_pg);
 	if (!IS_ALIGNED(fpsne, PAGE_SIZE))
-		indx_pad = ALIGN(fpsne, PAGE_SIZE) / size;
-
+		indx_pad = (fpsne & ~PAGE_MASK) / size;
 	hwq->pad_pgofft = indx_pad;
 	hwq->pad_pg = (u64 *)psn_pg;
 	hwq->pad_stride = size;
-- 
GitLab


From 097a9d23b7250355b182c5fd47dd4c55b22b1c33 Mon Sep 17 00:00:00 2001
From: Selvin Xavier <selvin.xavier@broadcom.com>
Date: Mon, 24 Aug 2020 11:14:31 -0700
Subject: [PATCH 0758/1341] RDMA/bnxt_re: Remove the qp from list only if the
 qp destroy succeeds

Driver crashes when destroy_qp is re-tried because of an error
returned. This is because the qp entry was removed from the qp list during
the first call.

Remove qp from the list only if destroy_qp returns success.

The driver will still trigger a WARN_ON due to the memory leaking, but at
least it isn't corrupting memory too.

Fixes: 8dae419f9ec7 ("RDMA/bnxt_re: Refactor queue pair creation code")
Link: https://lore.kernel.org/r/1598292876-26529-2-git-send-email-selvin.xavier@broadcom.com
Signed-off-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/bnxt_re/ib_verbs.c | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
index 62eb62c8603a5..0525b7461276a 100644
--- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c
+++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c
@@ -752,12 +752,6 @@ static int bnxt_re_destroy_gsi_sqp(struct bnxt_re_qp *qp)
 	gsi_sqp = rdev->gsi_ctx.gsi_sqp;
 	gsi_sah = rdev->gsi_ctx.gsi_sah;
 
-	/* remove from active qp list */
-	mutex_lock(&rdev->qp_lock);
-	list_del(&gsi_sqp->list);
-	mutex_unlock(&rdev->qp_lock);
-	atomic_dec(&rdev->qp_count);
-
 	ibdev_dbg(&rdev->ibdev, "Destroy the shadow AH\n");
 	bnxt_qplib_destroy_ah(&rdev->qplib_res,
 			      &gsi_sah->qplib_ah,
@@ -772,6 +766,12 @@ static int bnxt_re_destroy_gsi_sqp(struct bnxt_re_qp *qp)
 	}
 	bnxt_qplib_free_qp_res(&rdev->qplib_res, &gsi_sqp->qplib_qp);
 
+	/* remove from active qp list */
+	mutex_lock(&rdev->qp_lock);
+	list_del(&gsi_sqp->list);
+	mutex_unlock(&rdev->qp_lock);
+	atomic_dec(&rdev->qp_count);
+
 	kfree(rdev->gsi_ctx.sqp_tbl);
 	kfree(gsi_sah);
 	kfree(gsi_sqp);
@@ -792,11 +792,6 @@ int bnxt_re_destroy_qp(struct ib_qp *ib_qp, struct ib_udata *udata)
 	unsigned int flags;
 	int rc;
 
-	mutex_lock(&rdev->qp_lock);
-	list_del(&qp->list);
-	mutex_unlock(&rdev->qp_lock);
-	atomic_dec(&rdev->qp_count);
-
 	bnxt_qplib_flush_cqn_wq(&qp->qplib_qp);
 
 	rc = bnxt_qplib_destroy_qp(&rdev->qplib_res, &qp->qplib_qp);
@@ -819,6 +814,11 @@ int bnxt_re_destroy_qp(struct ib_qp *ib_qp, struct ib_udata *udata)
 			goto sh_fail;
 	}
 
+	mutex_lock(&rdev->qp_lock);
+	list_del(&qp->list);
+	mutex_unlock(&rdev->qp_lock);
+	atomic_dec(&rdev->qp_count);
+
 	ib_umem_release(qp->rumem);
 	ib_umem_release(qp->sumem);
 
-- 
GitLab


From c195d66a8a75c60515819b101975f38b7ec6577f Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Thu, 27 Aug 2020 17:14:36 +1000
Subject: [PATCH 0759/1341] crypto: af_alg - Work around empty control messages
 without MSG_MORE

The iwd daemon uses libell which sets up the skcipher operation with
two separate control messages.  As the first control message is sent
without MSG_MORE, it is interpreted as an empty request.

While libell should be fixed to use MSG_MORE where appropriate, this
patch works around the bug in the kernel so that existing binaries
continue to work.

We will print a warning however.

A separate issue is that the new kernel code no longer allows the
control message to be sent twice within the same request.  This
restriction is obviously incompatible with what iwd was doing (first
setting an IV and then sending the real control message).  This
patch changes the kernel so that this is explicitly allowed.

Reported-by: Caleb Jorden <caljorden@hotmail.com>
Fixes: f3c802a1f300 ("crypto: algif_aead - Only wake up when...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 crypto/af_alg.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/crypto/af_alg.c b/crypto/af_alg.c
index a6f581ab200c1..8be8bec07cdd2 100644
--- a/crypto/af_alg.c
+++ b/crypto/af_alg.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/net.h>
 #include <linux/rwsem.h>
+#include <linux/sched.h>
 #include <linux/sched/signal.h>
 #include <linux/security.h>
 
@@ -845,9 +846,15 @@ int af_alg_sendmsg(struct socket *sock, struct msghdr *msg, size_t size,
 	}
 
 	lock_sock(sk);
-	if (ctx->init && (init || !ctx->more)) {
-		err = -EINVAL;
-		goto unlock;
+	if (ctx->init && !ctx->more) {
+		if (ctx->used) {
+			err = -EINVAL;
+			goto unlock;
+		}
+
+		pr_info_once(
+			"%s sent an empty control message without MSG_MORE.\n",
+			current->comm);
 	}
 	ctx->init = true;
 
-- 
GitLab


From a092b7233f0e000cc6f2c71a49e2ecc6f917a5fc Mon Sep 17 00:00:00 2001
From: Himadri Pandya <himadrispandya@gmail.com>
Date: Thu, 27 Aug 2020 12:23:55 +0530
Subject: [PATCH 0760/1341] net: usb: Fix uninit-was-stored issue in
 asix_read_phy_addr()

The buffer size is 2 Bytes and we expect to receive the same amount of
data. But sometimes we receive less data and run into uninit-was-stored
issue upon read. Hence modify the error check on the return value to match
with the buffer size as a prevention.

Reported-and-tested by: syzbot+a7e220df5a81d1ab400e@syzkaller.appspotmail.com
Signed-off-by: Himadri Pandya <himadrispandya@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/usb/asix_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/usb/asix_common.c b/drivers/net/usb/asix_common.c
index e39f41efda3ec..7bc6e8f856fe0 100644
--- a/drivers/net/usb/asix_common.c
+++ b/drivers/net/usb/asix_common.c
@@ -296,7 +296,7 @@ int asix_read_phy_addr(struct usbnet *dev, int internal)
 
 	netdev_dbg(dev->net, "asix_get_phy_addr()\n");
 
-	if (ret < 0) {
+	if (ret < 2) {
 		netdev_err(dev->net, "Error reading PHYID register: %02x\n", ret);
 		goto out;
 	}
-- 
GitLab


From 645f08975f49441b3e753d8dc5b740cbcb226594 Mon Sep 17 00:00:00 2001
From: Miaohe Lin <linmiaohe@huawei.com>
Date: Thu, 27 Aug 2020 07:27:49 -0400
Subject: [PATCH 0761/1341] net: Fix some comments

Fix some comments, including wrong function name, duplicated word and so
on.

Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 include/linux/skbuff.h  | 4 ++--
 include/uapi/linux/in.h | 2 +-
 net/core/sock.c         | 2 +-
 net/ipv4/raw.c          | 2 +-
 net/l3mdev/l3mdev.c     | 2 +-
 net/socket.c            | 4 ++--
 6 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index e8bca74857a38..8d9ab50b08c95 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -71,7 +71,7 @@
  *	NETIF_F_IPV6_CSUM - Driver (device) is only able to checksum plain
  *			  TCP or UDP packets over IPv6. These are specifically
  *			  unencapsulated packets of the form IPv6|TCP or
- *			  IPv4|UDP where the Next Header field in the IPv6
+ *			  IPv6|UDP where the Next Header field in the IPv6
  *			  header is either TCP or UDP. IPv6 extension headers
  *			  are not supported with this feature. This feature
  *			  cannot be set in features for a device with
@@ -2667,7 +2667,7 @@ static inline int pskb_network_may_pull(struct sk_buff *skb, unsigned int len)
  *
  * Using max(32, L1_CACHE_BYTES) makes sense (especially with RPS)
  * to reduce average number of cache lines per packet.
- * get_rps_cpus() for example only access one 64 bytes aligned block :
+ * get_rps_cpu() for example only access one 64 bytes aligned block :
  * NET_IP_ALIGN(2) + ethernet_header(14) + IP_header(20/40) + ports(8)
  */
 #ifndef NET_SKB_PAD
diff --git a/include/uapi/linux/in.h b/include/uapi/linux/in.h
index 3d0d8231dc196..7d6687618d808 100644
--- a/include/uapi/linux/in.h
+++ b/include/uapi/linux/in.h
@@ -135,7 +135,7 @@ struct in_addr {
  * this socket to prevent accepting spoofed ones.
  */
 #define IP_PMTUDISC_INTERFACE		4
-/* weaker version of IP_PMTUDISC_INTERFACE, which allos packets to get
+/* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get
  * fragmented if they exeed the interface mtu
  */
 #define IP_PMTUDISC_OMIT		5
diff --git a/net/core/sock.c b/net/core/sock.c
index e4f40b175acb7..8eb2c924805a5 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -3254,7 +3254,7 @@ void sk_common_release(struct sock *sk)
 		sk->sk_prot->destroy(sk);
 
 	/*
-	 * Observation: when sock_common_release is called, processes have
+	 * Observation: when sk_common_release is called, processes have
 	 * no access to socket. But net still has.
 	 * Step one, detach it from networking:
 	 *
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index 6fd4330287c27..407956be7deb3 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -610,7 +610,7 @@ static int raw_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
 	} else if (!ipc.oif) {
 		ipc.oif = inet->uc_index;
 	} else if (ipv4_is_lbcast(daddr) && inet->uc_index) {
-		/* oif is set, packet is to local broadcast and
+		/* oif is set, packet is to local broadcast
 		 * and uc_index is set. oif is most likely set
 		 * by sk_bound_dev_if. If uc_index != oif check if the
 		 * oif is an L3 master and uc_index is an L3 slave.
diff --git a/net/l3mdev/l3mdev.c b/net/l3mdev/l3mdev.c
index e71ca5aec684a..864326f150e2f 100644
--- a/net/l3mdev/l3mdev.c
+++ b/net/l3mdev/l3mdev.c
@@ -154,7 +154,7 @@ int l3mdev_master_upper_ifindex_by_index_rcu(struct net *net, int ifindex)
 EXPORT_SYMBOL_GPL(l3mdev_master_upper_ifindex_by_index_rcu);
 
 /**
- *	l3mdev_fib_table - get FIB table id associated with an L3
+ *	l3mdev_fib_table_rcu - get FIB table id associated with an L3
  *                             master interface
  *	@dev: targeted interface
  */
diff --git a/net/socket.c b/net/socket.c
index dbbe8ea7d395d..0c0144604f818 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -3610,7 +3610,7 @@ int kernel_getsockname(struct socket *sock, struct sockaddr *addr)
 EXPORT_SYMBOL(kernel_getsockname);
 
 /**
- *	kernel_peername - get the address which the socket is connected (kernel space)
+ *	kernel_getpeername - get the address which the socket is connected (kernel space)
  *	@sock: socket
  *	@addr: address holder
  *
@@ -3671,7 +3671,7 @@ int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
 EXPORT_SYMBOL(kernel_sendpage_locked);
 
 /**
- *	kernel_shutdown - shut down part of a full-duplex connection (kernel space)
+ *	kernel_sock_shutdown - shut down part of a full-duplex connection (kernel space)
  *	@sock: socket
  *	@how: connection part
  *
-- 
GitLab


From 125eac243806e021f33a1fdea3687eccbb9f7636 Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <darrick.wong@oracle.com>
Date: Wed, 26 Aug 2020 14:12:18 -0700
Subject: [PATCH 0762/1341] xfs: initialize the shortform attr header padding
 entry

Don't leak kernel memory contents into the shortform attr fork.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 fs/xfs/libxfs/xfs_attr_leaf.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
index 383b08f2ac61f..305d4bc073370 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -653,8 +653,8 @@ xfs_attr_shortform_create(
 		ASSERT(ifp->if_flags & XFS_IFINLINE);
 	}
 	xfs_idata_realloc(dp, sizeof(*hdr), XFS_ATTR_FORK);
-	hdr = (xfs_attr_sf_hdr_t *)ifp->if_u1.if_data;
-	hdr->count = 0;
+	hdr = (struct xfs_attr_sf_hdr *)ifp->if_u1.if_data;
+	memset(hdr, 0, sizeof(*hdr));
 	hdr->totsize = cpu_to_be16(sizeof(*hdr));
 	xfs_trans_log_inode(args->trans, dp, XFS_ILOG_CORE | XFS_ILOG_ADATA);
 }
-- 
GitLab


From b972fdba8665d75109ade0357739f46af6415d2a Mon Sep 17 00:00:00 2001
From: Shiju Jose <shiju.jose@huawei.com>
Date: Thu, 27 Aug 2020 15:04:50 +0100
Subject: [PATCH 0763/1341] EDAC/ghes: Fix NULL pointer dereference in
 ghes_edac_register()

After

  b9cae27728d1 ("EDAC/ghes: Scan the system once on driver init")

and with CONFIG_DEBUG_TEST_DRIVER_REMOVE enabled, ghes_hw.dimms becomes
a NULL pointer after the second ->probe() (aka ghes_edac_register())
which the config option causes to be called.

This happens because the static variable which holds down whether
the system has been scanned already, doesn't get reset in
ghes_edac_unregister(). Then, on the second probe, ghes_scan_system()
doesn't get to enumerate the DIMMs, leading to ghes_hw.dimms remaining
NULL.

Clear the variable and rename it to something more descriptive so that a
second probe succeeds.

 [ bp: Rewrite commit message. ]

Fixes: b9cae27728d1 ("EDAC/ghes: Scan the system once on driver init")
Suggested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200827140450.1620-1-shiju.jose@huawei.com
---
 drivers/edac/ghes_edac.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index da60c29468a7c..54ebc8afc6b1b 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -55,6 +55,8 @@ static DEFINE_SPINLOCK(ghes_lock);
 static bool __read_mostly force_load;
 module_param(force_load, bool, 0);
 
+static bool system_scanned;
+
 /* Memory Device - Type 17 of SMBIOS spec */
 struct memdev_dmi_entry {
 	u8 type;
@@ -225,14 +227,12 @@ static void enumerate_dimms(const struct dmi_header *dh, void *arg)
 
 static void ghes_scan_system(void)
 {
-	static bool scanned;
-
-	if (scanned)
+	if (system_scanned)
 		return;
 
 	dmi_walk(enumerate_dimms, &ghes_hw);
 
-	scanned = true;
+	system_scanned = true;
 }
 
 void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
@@ -631,6 +631,8 @@ void ghes_edac_unregister(struct ghes *ghes)
 
 	mutex_lock(&ghes_reg_mutex);
 
+	system_scanned = false;
+
 	if (!refcount_dec_and_test(&ghes_refcount))
 		goto unlock;
 
-- 
GitLab


From 07b5b12d97dc9f47ff3dff46c4f944a15bd762e5 Mon Sep 17 00:00:00 2001
From: Yu Kuai <yukuai3@huawei.com>
Date: Wed, 26 Aug 2020 09:08:26 +0800
Subject: [PATCH 0764/1341] drm/sun4i: add missing put_device() call in
 sun8i_r40_tcon_tv_set_mux()

If sun8i_r40_tcon_tv_set_mux() succeed, sun8i_r40_tcon_tv_set_mux()
doesn't have a corresponding put_device(). Thus add put_device()
to fix the exception handling for this function implementation.

Fixes: 0305189afb32 ("drm/sun4i: tcon: Add support for R40 TCON")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20200826010826.1785487-1-yukuai3@huawei.com
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index 359b56e43b83c..24d95f058918c 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -1433,14 +1433,18 @@ static int sun8i_r40_tcon_tv_set_mux(struct sun4i_tcon *tcon,
 	if (IS_ENABLED(CONFIG_DRM_SUN8I_TCON_TOP) &&
 	    encoder->encoder_type == DRM_MODE_ENCODER_TMDS) {
 		ret = sun8i_tcon_top_set_hdmi_src(&pdev->dev, id);
-		if (ret)
+		if (ret) {
+			put_device(&pdev->dev);
 			return ret;
+		}
 	}
 
 	if (IS_ENABLED(CONFIG_DRM_SUN8I_TCON_TOP)) {
 		ret = sun8i_tcon_top_de_config(&pdev->dev, tcon->id, id);
-		if (ret)
+		if (ret) {
+			put_device(&pdev->dev);
 			return ret;
+		}
 	}
 
 	return 0;
-- 
GitLab


From af8ea111134624855710a0ef5543b871d49b0162 Mon Sep 17 00:00:00 2001
From: Murali Karicheri <m-karicheri2@ti.com>
Date: Thu, 27 Aug 2020 10:38:39 -0400
Subject: [PATCH 0765/1341] net: ethernet: ti: cpsw_new: fix error handling in
 cpsw_ndo_vlan_rx_kill_vid()

This patch fixes a bunch of issues in cpsw_ndo_vlan_rx_kill_vid()

 - pm_runtime_get_sync() returns non zero value. This results in
   non zero value return to caller which will be interpreted as error.
   So overwrite ret with zero.
 - If VID matches with port VLAN VID, then set error code.
 - Currently when VLAN interface is deleted, all of the VLAN mc addresses
   are removed from ALE table, however the return values from ale function
   calls are not checked. These functions can return error code -ENOENT.
   But that shouldn't happen in a normal case. So add error print to
   catch the situations so that these can be investigated and addressed.
   return zero in these cases as these are not real error case, but only
   serve to catch ALE table update related issues and help address the
   same in the driver.

Fixes: ed3525eda4c4 ("net: ethernet: ti: introduce cpsw switchdev based driver part 1 - dual-emac")
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/ti/cpsw_new.c | 27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/ti/cpsw_new.c b/drivers/net/ethernet/ti/cpsw_new.c
index 8d0a2bc7128d4..8ed78577cdedf 100644
--- a/drivers/net/ethernet/ti/cpsw_new.c
+++ b/drivers/net/ethernet/ti/cpsw_new.c
@@ -1032,19 +1032,34 @@ static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
 		return ret;
 	}
 
+	/* reset the return code as pm_runtime_get_sync() can return
+	 * non zero values as well.
+	 */
+	ret = 0;
 	for (i = 0; i < cpsw->data.slaves; i++) {
 		if (cpsw->slaves[i].ndev &&
-		    vid == cpsw->slaves[i].port_vlan)
+		    vid == cpsw->slaves[i].port_vlan) {
+			ret = -EINVAL;
 			goto err;
+		}
 	}
 
 	dev_dbg(priv->dev, "removing vlanid %d from vlan filter\n", vid);
-	cpsw_ale_del_vlan(cpsw->ale, vid, 0);
-	cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
-			   HOST_PORT_NUM, ALE_VLAN, vid);
-	cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
-			   0, ALE_VLAN, vid);
+	ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
+	if (ret)
+		dev_err(priv->dev, "cpsw_ale_del_vlan() failed: ret %d\n", ret);
+	ret = cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
+				 HOST_PORT_NUM, ALE_VLAN, vid);
+	if (ret)
+		dev_err(priv->dev, "cpsw_ale_del_ucast() failed: ret %d\n",
+			ret);
+	ret = cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
+				 0, ALE_VLAN, vid);
+	if (ret)
+		dev_err(priv->dev, "cpsw_ale_del_mcast failed. ret %d\n",
+			ret);
 	cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
+	ret = 0;
 err:
 	pm_runtime_put(cpsw->dev);
 	return ret;
-- 
GitLab


From 210e799ed275488bcae16f1acd3d259043ec6c68 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 26 Aug 2020 14:32:14 +0300
Subject: [PATCH 0766/1341] afs: Remove erroneous fallthough annotation

The fall through annotation comes after a return statement so it's not
reachable.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 fs/afs/flock.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/fs/afs/flock.c b/fs/afs/flock.c
index eff82a6839e4c..cb3054c7843ea 100644
--- a/fs/afs/flock.c
+++ b/fs/afs/flock.c
@@ -376,7 +376,6 @@ void afs_lock_work(struct work_struct *work)
 		spin_unlock(&vnode->lock);
 		return;
 
-		fallthrough;
 	default:
 		/* Looks like a lock request was withdrawn. */
 		spin_unlock(&vnode->lock);
-- 
GitLab


From c1ae18d313e24bc7833e1749dd36dba5d47f259c Mon Sep 17 00:00:00 2001
From: Tim Harvey <tharvey@gateworks.com>
Date: Thu, 27 Aug 2020 10:20:24 -0700
Subject: [PATCH 0767/1341] hwmon: (gsc-hwmon) Scale temperature to
 millidegrees

The GSC registers report temperature in decidegrees celcius so we
need to scale it to represent the hwmon sysfs API of millidegrees.

Cc: stable@vger.kernel.org
Fixes: 3bce5377ef66 ("hwmon: Add Gateworks System Controller support")
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Link: https://lore.kernel.org/r/1598548824-16898-1-git-send-email-tharvey@gateworks.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/hwmon/gsc-hwmon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hwmon/gsc-hwmon.c b/drivers/hwmon/gsc-hwmon.c
index 3dfe2ca2f8c89..c6d4567f39520 100644
--- a/drivers/hwmon/gsc-hwmon.c
+++ b/drivers/hwmon/gsc-hwmon.c
@@ -172,6 +172,7 @@ gsc_hwmon_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
 	case mode_temperature:
 		if (tmp > 0x8000)
 			tmp -= 0xffff;
+		tmp *= 100; /* convert to millidegrees celsius */
 		break;
 	case mode_voltage_raw:
 		tmp = clamp_val(tmp, 0, BIT(GSC_HWMON_RESOLUTION));
-- 
GitLab


From b43c75abfd084b9e961a47c6331e01f2f91176b6 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Thu, 27 Aug 2020 16:55:46 +0100
Subject: [PATCH 0768/1341] rxrpc: Fix memory leak in rxkad_verify_response()

Fix a memory leak in rxkad_verify_response() whereby the response buffer
doesn't get freed if we fail to allocate a ticket buffer.

Fixes: ef68622da9cc ("rxrpc: Handle temporary errors better in rxkad security")
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/rxrpc/rxkad.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/rxrpc/rxkad.c b/net/rxrpc/rxkad.c
index 52a24d4ef5d8a..e08130e5746b5 100644
--- a/net/rxrpc/rxkad.c
+++ b/net/rxrpc/rxkad.c
@@ -1137,7 +1137,7 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
 	ret = -ENOMEM;
 	ticket = kmalloc(ticket_len, GFP_NOFS);
 	if (!ticket)
-		goto temporary_error;
+		goto temporary_error_free_resp;
 
 	eproto = tracepoint_string("rxkad_tkt_short");
 	abort_code = RXKADPACKETSHORT;
@@ -1230,6 +1230,7 @@ static int rxkad_verify_response(struct rxrpc_connection *conn,
 
 temporary_error_free_ticket:
 	kfree(ticket);
+temporary_error_free_resp:
 	kfree(response);
 temporary_error:
 	/* Ignore the response packet if we got a temporary error such as
-- 
GitLab


From e5c388b4b967037a0e00b60194b0dbcf94881a9b Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Fri, 7 Aug 2020 21:29:28 -0700
Subject: [PATCH 0769/1341] ARC: show_regs: fix r12 printing and simplify

when working on ARC64, spotted an issue in ARCv2 reg file printing.
print_reg_file() assumes contiguous reg-file whereas in ARCv2 they are
not: r12 comes before r0-r11 due to hardware auto-save. Apparently this
issue has been present since v2 port submission.

To avoid bolting hacks for this discontinuity while looping through
pt_regs, just ditching the loop and print pt_regs directly.

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 arch/arc/kernel/troubleshoot.c | 77 +++++++++++++---------------------
 1 file changed, 30 insertions(+), 47 deletions(-)

diff --git a/arch/arc/kernel/troubleshoot.c b/arch/arc/kernel/troubleshoot.c
index 28e8bf04b253f..a331bb5d8319f 100644
--- a/arch/arc/kernel/troubleshoot.c
+++ b/arch/arc/kernel/troubleshoot.c
@@ -18,44 +18,37 @@
 
 #define ARC_PATH_MAX	256
 
-/*
- * Common routine to print scratch regs (r0-r12) or callee regs (r13-r25)
- *   -Prints 3 regs per line and a CR.
- *   -To continue, callee regs right after scratch, special handling of CR
- */
-static noinline void print_reg_file(long *reg_rev, int start_num)
+static noinline void print_regs_scratch(struct pt_regs *regs)
 {
-	unsigned int i;
-	char buf[512];
-	int n = 0, len = sizeof(buf);
-
-	for (i = start_num; i < start_num + 13; i++) {
-		n += scnprintf(buf + n, len - n, "r%02u: 0x%08lx\t",
-			       i, (unsigned long)*reg_rev);
-
-		if (((i + 1) % 3) == 0)
-			n += scnprintf(buf + n, len - n, "\n");
-
-		/* because pt_regs has regs reversed: r12..r0, r25..r13 */
-		if (is_isa_arcv2() && start_num == 0)
-			reg_rev++;
-		else
-			reg_rev--;
-	}
-
-	if (start_num != 0)
-		n += scnprintf(buf + n, len - n, "\n\n");
+	pr_cont("BTA: 0x%08lx\n SP: 0x%08lx  FP: 0x%08lx BLK: %pS\n",
+		regs->bta, regs->sp, regs->fp, (void *)regs->blink);
+	pr_cont("LPS: 0x%08lx\tLPE: 0x%08lx\tLPC: 0x%08lx\n",
+		regs->lp_start, regs->lp_end, regs->lp_count);
 
-	/* To continue printing callee regs on same line as scratch regs */
-	if (start_num == 0)
-		pr_info("%s", buf);
-	else
-		pr_cont("%s\n", buf);
+	pr_info("r00: 0x%08lx\tr01: 0x%08lx\tr02: 0x%08lx\n"	\
+		"r03: 0x%08lx\tr04: 0x%08lx\tr05: 0x%08lx\n"	\
+		"r06: 0x%08lx\tr07: 0x%08lx\tr08: 0x%08lx\n"	\
+		"r09: 0x%08lx\tr10: 0x%08lx\tr11: 0x%08lx\n"	\
+		"r12: 0x%08lx\t",
+		regs->r0, regs->r1, regs->r2,
+		regs->r3, regs->r4, regs->r5,
+		regs->r6, regs->r7, regs->r8,
+		regs->r9, regs->r10, regs->r11,
+		regs->r12);
 }
 
-static void show_callee_regs(struct callee_regs *cregs)
+static void print_regs_callee(struct callee_regs *regs)
 {
-	print_reg_file(&(cregs->r13), 13);
+	pr_cont("r13: 0x%08lx\tr14: 0x%08lx\n"			\
+		"r15: 0x%08lx\tr16: 0x%08lx\tr17: 0x%08lx\n"	\
+		"r18: 0x%08lx\tr19: 0x%08lx\tr20: 0x%08lx\n"	\
+		"r21: 0x%08lx\tr22: 0x%08lx\tr23: 0x%08lx\n"	\
+		"r24: 0x%08lx\tr25: 0x%08lx\n",
+		regs->r13, regs->r14,
+		regs->r15, regs->r16, regs->r17,
+		regs->r18, regs->r19, regs->r20,
+		regs->r21, regs->r22, regs->r23,
+		regs->r24, regs->r25);
 }
 
 static void print_task_path_n_nm(struct task_struct *tsk)
@@ -175,7 +168,7 @@ static void show_ecr_verbose(struct pt_regs *regs)
 void show_regs(struct pt_regs *regs)
 {
 	struct task_struct *tsk = current;
-	struct callee_regs *cregs;
+	struct callee_regs *cregs = (struct callee_regs *)tsk->thread.callee_reg;
 
 	/*
 	 * generic code calls us with preemption disabled, but some calls
@@ -204,25 +197,15 @@ void show_regs(struct pt_regs *regs)
 			STS_BIT(regs, A2), STS_BIT(regs, A1),
 			STS_BIT(regs, E2), STS_BIT(regs, E1));
 #else
-	pr_cont(" [%2s%2s%2s%2s]",
+	pr_cont(" [%2s%2s%2s%2s]   ",
 			STS_BIT(regs, IE),
 			(regs->status32 & STATUS_U_MASK) ? "U " : "K ",
 			STS_BIT(regs, DE), STS_BIT(regs, AE));
 #endif
-	pr_cont("  BTA: 0x%08lx\n  SP: 0x%08lx  FP: 0x%08lx BLK: %pS\n",
-		regs->bta, regs->sp, regs->fp, (void *)regs->blink);
-	pr_info("LPS: 0x%08lx\tLPE: 0x%08lx\tLPC: 0x%08lx\n",
-		regs->lp_start, regs->lp_end, regs->lp_count);
-
-	/* print regs->r0 thru regs->r12
-	 * Sequential printing was generating horrible code
-	 */
-	print_reg_file(&(regs->r0), 0);
 
-	/* If Callee regs were saved, display them too */
-	cregs = (struct callee_regs *)current->thread.callee_reg;
+	print_regs_scratch(regs);
 	if (cregs)
-		show_callee_regs(cregs);
+		print_regs_callee(cregs);
 
 	preempt_disable();
 }
-- 
GitLab


From 89d29997f103d08264b0685796b420d911658b96 Mon Sep 17 00:00:00 2001
From: Vineet Gupta <vgupta@synopsys.com>
Date: Mon, 24 Aug 2020 12:10:33 -0700
Subject: [PATCH 0770/1341] irqchip/eznps: Fix build error for !ARC700 builds

eznps driver is supposed to be platform independent however it ends up
including stuff from inside arch/arc headers leading to rand config
build errors.

The quick hack to fix this (proper fix is too much chrun for non active
user-base) is to add following to nps platform agnostic header.
 - copy AUX_IENABLE from arch/arc header
 - move CTOP_AUX_IACK from arch/arc/plat-eznps/*/**

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://lkml.kernel.org/r/20200824095831.5lpkmkafelnvlpi2@linutronix.de
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 arch/arc/plat-eznps/include/plat/ctop.h | 1 -
 include/soc/nps/common.h                | 6 ++++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arc/plat-eznps/include/plat/ctop.h b/arch/arc/plat-eznps/include/plat/ctop.h
index a4a61531c7fb9..77712c5ffe848 100644
--- a/arch/arc/plat-eznps/include/plat/ctop.h
+++ b/arch/arc/plat-eznps/include/plat/ctop.h
@@ -33,7 +33,6 @@
 #define CTOP_AUX_DPC				(CTOP_AUX_BASE + 0x02C)
 #define CTOP_AUX_LPC				(CTOP_AUX_BASE + 0x030)
 #define CTOP_AUX_EFLAGS				(CTOP_AUX_BASE + 0x080)
-#define CTOP_AUX_IACK				(CTOP_AUX_BASE + 0x088)
 #define CTOP_AUX_GPA1				(CTOP_AUX_BASE + 0x08C)
 #define CTOP_AUX_UDMC				(CTOP_AUX_BASE + 0x300)
 
diff --git a/include/soc/nps/common.h b/include/soc/nps/common.h
index 9b1d43d671a3f..8c18dc6d3fde5 100644
--- a/include/soc/nps/common.h
+++ b/include/soc/nps/common.h
@@ -45,6 +45,12 @@
 #define CTOP_INST_MOV2B_FLIP_R3_B1_B2_INST	0x5B60
 #define CTOP_INST_MOV2B_FLIP_R3_B1_B2_LIMM	0x00010422
 
+#ifndef AUX_IENABLE
+#define AUX_IENABLE				0x40c
+#endif
+
+#define CTOP_AUX_IACK				(0xFFFFF800 + 0x088)
+
 #ifndef __ASSEMBLY__
 
 /* In order to increase compilation test coverage */
-- 
GitLab


From 0cc4a0c486f37af1ea3932ae8f76afbefe105a32 Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Date: Thu, 27 Aug 2020 15:36:28 -0500
Subject: [PATCH 0771/1341] media: dib0700: Fix identation issue in
 dib8096_set_param_override()

Fix identation issues.

Fixes: 5e9c85d98337 ("[media] dib8096: enhancement")
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/media/usb/dvb-usb/dib0700_devices.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/media/usb/dvb-usb/dib0700_devices.c b/drivers/media/usb/dvb-usb/dib0700_devices.c
index a6ae46567a313..52e648e2713ae 100644
--- a/drivers/media/usb/dvb-usb/dib0700_devices.c
+++ b/drivers/media/usb/dvb-usb/dib0700_devices.c
@@ -1659,14 +1659,14 @@ static int dib8096_set_param_override(struct dvb_frontend *fe)
 
 	switch (band) {
 	default:
-			deb_info("Warning : Rf frequency  (%iHz) is not in the supported range, using VHF switch ", fe->dtv_property_cache.frequency);
+		deb_info("Warning : Rf frequency  (%iHz) is not in the supported range, using VHF switch ", fe->dtv_property_cache.frequency);
 		fallthrough;
 	case BAND_VHF:
-			state->dib8000_ops.set_gpio(fe, 3, 0, 1);
-			break;
+		state->dib8000_ops.set_gpio(fe, 3, 0, 1);
+		break;
 	case BAND_UHF:
-			state->dib8000_ops.set_gpio(fe, 3, 0, 0);
-			break;
+		state->dib8000_ops.set_gpio(fe, 3, 0, 0);
+		break;
 	}
 
 	ret = state->set_param_save(fe);
-- 
GitLab


From c165a08d2b2857c91c627039c4881f9d7ad1a3bd Mon Sep 17 00:00:00 2001
From: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Date: Thu, 27 Aug 2020 15:44:32 -0500
Subject: [PATCH 0772/1341] arm64/cpuinfo: Remove unnecessary fallthrough
 annotation

Fallthrough annotations for consecutive default and case labels
are not necessary.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 arch/arm64/kernel/cpuinfo.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index 1886a02c3f501..d0076c2159e66 100644
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -327,7 +327,6 @@ static void cpuinfo_detect_icache_policy(struct cpuinfo_arm64 *info)
 		set_bit(ICACHEF_VPIPT, &__icache_flags);
 		break;
 	default:
-		fallthrough;
 	case ICACHE_POLICY_VIPT:
 		/* Assume aliasing */
 		set_bit(ICACHEF_ALIASING, &__icache_flags);
-- 
GitLab


From eefdf30f3dcb5c1d47bee2b3afdb9d4d05343ff3 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Thu, 27 Aug 2020 16:40:19 -0600
Subject: [PATCH 0773/1341] io_uring: fix IOPOLL -EAGAIN retries

This normally isn't hit, as polling is mostly done on NVMe with deep
queue depths. But if we do run into request starvation, we need to
ensure that retries are properly serialized.

Reported-by: Andres Freund <andres@anarazel.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 6df08287c59e1..8c77ad4a65f06 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -1150,7 +1150,7 @@ static void io_prep_async_work(struct io_kiocb *req)
 	io_req_init_async(req);
 
 	if (req->flags & REQ_F_ISREG) {
-		if (def->hash_reg_file)
+		if (def->hash_reg_file || (req->ctx->flags & IORING_SETUP_IOPOLL))
 			io_wq_hash_work(&req->work, file_inode(req->file));
 	} else {
 		if (def->unbound_nonreg_file)
@@ -3132,6 +3132,7 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
 	ret = io_import_iovec(READ, req, &iovec, iter, !force_nonblock);
 	if (ret < 0)
 		return ret;
+	iov_count = iov_iter_count(iter);
 	io_size = ret;
 	req->result = io_size;
 	ret = 0;
@@ -3144,7 +3145,6 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
 	if (force_nonblock && !io_file_supports_async(req->file, READ))
 		goto copy_iov;
 
-	iov_count = iov_iter_count(iter);
 	ret = rw_verify_area(READ, req->file, io_kiocb_ppos(kiocb), iov_count);
 	if (unlikely(ret))
 		goto out_free;
@@ -3157,7 +3157,8 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
 		ret = 0;
 		goto out_free;
 	} else if (ret == -EAGAIN) {
-		if (!force_nonblock)
+		/* IOPOLL retry should happen for io-wq threads */
+		if (!force_nonblock && !(req->ctx->flags & IORING_SETUP_IOPOLL))
 			goto done;
 		/* some cases will consume bytes even on error returns */
 		iov_iter_revert(iter, iov_count - iov_iter_count(iter));
@@ -3251,6 +3252,7 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
 	ret = io_import_iovec(WRITE, req, &iovec, iter, !force_nonblock);
 	if (ret < 0)
 		return ret;
+	iov_count = iov_iter_count(iter);
 	io_size = ret;
 	req->result = io_size;
 
@@ -3267,7 +3269,6 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
 	    (req->flags & REQ_F_ISREG))
 		goto copy_iov;
 
-	iov_count = iov_iter_count(iter);
 	ret = rw_verify_area(WRITE, req->file, io_kiocb_ppos(kiocb), iov_count);
 	if (unlikely(ret))
 		goto out_free;
@@ -3301,11 +3302,14 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
 	if (ret2 == -EOPNOTSUPP && (kiocb->ki_flags & IOCB_NOWAIT))
 		ret2 = -EAGAIN;
 	if (!force_nonblock || ret2 != -EAGAIN) {
+		/* IOPOLL retry should happen for io-wq threads */
+		if ((req->ctx->flags & IORING_SETUP_IOPOLL) && ret2 == -EAGAIN)
+			goto copy_iov;
 		kiocb_done(kiocb, ret2, cs);
 	} else {
+copy_iov:
 		/* some cases will consume bytes even on error returns */
 		iov_iter_revert(iter, iov_count - iov_iter_count(iter));
-copy_iov:
 		ret = io_setup_async_rw(req, iovec, inline_vecs, iter, false);
 		if (!ret)
 			return -EAGAIN;
-- 
GitLab


From fdee946d0925f971f167d2606984426763355e4f Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Thu, 27 Aug 2020 16:46:24 -0600
Subject: [PATCH 0774/1341] io_uring: don't bounce block based -EAGAIN retry
 off task_work

These events happen inline from submission, so there's no need to
bounce them through the original task. Just set them up for retry
and issue retry directly instead of going over task_work.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 26 ++++++--------------------
 1 file changed, 6 insertions(+), 20 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 8c77ad4a65f06..852c2eaf1a9ac 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2295,22 +2295,6 @@ static bool io_resubmit_prep(struct io_kiocb *req, int error)
 	io_req_complete(req, ret);
 	return false;
 }
-
-static void io_rw_resubmit(struct callback_head *cb)
-{
-	struct io_kiocb *req = container_of(cb, struct io_kiocb, task_work);
-	struct io_ring_ctx *ctx = req->ctx;
-	int err;
-
-	err = io_sq_thread_acquire_mm(ctx, req);
-
-	if (io_resubmit_prep(req, err)) {
-		refcount_inc(&req->refs);
-		io_queue_async_work(req);
-	}
-
-	percpu_ref_put(&ctx->refs);
-}
 #endif
 
 static bool io_rw_reissue(struct io_kiocb *req, long res)
@@ -2321,12 +2305,14 @@ static bool io_rw_reissue(struct io_kiocb *req, long res)
 	if ((res != -EAGAIN && res != -EOPNOTSUPP) || io_wq_current_is_worker())
 		return false;
 
-	init_task_work(&req->task_work, io_rw_resubmit);
-	percpu_ref_get(&req->ctx->refs);
+	ret = io_sq_thread_acquire_mm(req->ctx, req);
 
-	ret = io_req_task_work_add(req, &req->task_work, true);
-	if (!ret)
+	if (io_resubmit_prep(req, ret)) {
+		refcount_inc(&req->refs);
+		io_queue_async_work(req);
 		return true;
+	}
+
 #endif
 	return false;
 }
-- 
GitLab


From 4a133eb351ccc275683ad49305d0b04dde903733 Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@csgroup.eu>
Date: Thu, 27 Aug 2020 18:30:27 +0000
Subject: [PATCH 0775/1341] powerpc/32s: Disable VMAP stack which
 CONFIG_ADB_PMU

low_sleep_handler() can't restore the context from virtual
stack because the stack can hardly be accessed with MMU OFF.

For now, disable VMAP stack when CONFIG_ADB_PMU is selected.

Fixes: cd08f109e262 ("powerpc/32s: Enable CONFIG_VMAP_STACK")
Cc: stable@vger.kernel.org # v5.6+
Reported-by: Giuseppe Sacco <giuseppe@sguazz.it>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ec96c15bfa1a7415ab604ee1c98cd45779c08be0.1598553015.git.christophe.leroy@csgroup.eu
---
 arch/powerpc/platforms/Kconfig.cputype | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 87737ec86d39a..1dc9d3c818726 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -36,7 +36,7 @@ config PPC_BOOK3S_6xx
 	select PPC_HAVE_PMU_SUPPORT
 	select PPC_HAVE_KUEP
 	select PPC_HAVE_KUAP
-	select HAVE_ARCH_VMAP_STACK
+	select HAVE_ARCH_VMAP_STACK if !ADB_PMU
 
 config PPC_BOOK3S_601
 	bool "PowerPC 601"
-- 
GitLab


From 6af10a33c501b0b5878476501143c2cfbbfd63a2 Mon Sep 17 00:00:00 2001
From: Yufen Yu <yuyufen@huawei.com>
Date: Thu, 20 Aug 2020 09:22:05 -0400
Subject: [PATCH 0776/1341] md/raid5: make sure stripe_size as power of two

Commit 3b5408b98e4d ("md/raid5: support config stripe_size by sysfs
entry") make stripe_size as a configurable value. It just requires
stripe_size as multiple of 4KB.

In fact, we should make sure stripe_size as power of two. Otherwise,
stripe_shift which is the result of ilog2 can not represent the real
stripe_size. Then, stripe_hash() and stripe_hash_locks_hash() may
get unexpected value.

Fixes: 3b5408b98e4d ("md/raid5: support config stripe_size by sysfs entry")
Signed-off-by: Yufen Yu <yuyufen@huawei.com>
Signed-off-by: Song Liu <songliubraving@fb.com>
---
 drivers/md/raid5.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index ef0fd4830803f..a095c7a4cd7cb 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -6514,9 +6514,12 @@ raid5_store_stripe_size(struct mddev  *mddev, const char *page, size_t len)
 
 	/*
 	 * The value should not be bigger than PAGE_SIZE. It requires to
-	 * be multiple of DEFAULT_STRIPE_SIZE.
+	 * be multiple of DEFAULT_STRIPE_SIZE and the value should be power
+	 * of two.
 	 */
-	if (new % DEFAULT_STRIPE_SIZE != 0 || new > PAGE_SIZE || new == 0)
+	if (new % DEFAULT_STRIPE_SIZE != 0 ||
+			new > PAGE_SIZE || new == 0 ||
+			new != roundup_pow_of_two(new))
 		return -EINVAL;
 
 	err = mddev_lock(mddev);
-- 
GitLab


From d6f6cbeee4e5ee6976792851e0461c19f1ede864 Mon Sep 17 00:00:00 2001
From: Wenbin Mei <wenbin.mei@mediatek.com>
Date: Fri, 14 Aug 2020 09:43:45 +0800
Subject: [PATCH 0777/1341] arm64: dts: mt7622: add reset node for mmc device

This commit adds reset node for mmc device.

Cc: <stable@vger.kernel.org> # v5.4+
Fixes: 966580ad236e ("mmc: mediatek: add support for MT7622 SoC")
Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Tested-by: Frank Wunderlich <frank-w@public-files.de>
Acked-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/20200814014346.6496-3-wenbin.mei@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 arch/arm64/boot/dts/mediatek/mt7622.dtsi | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7622.dtsi b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
index 1a39e0ef776bb..5b9ec032ce8d8 100644
--- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
@@ -686,6 +686,8 @@ mmc0: mmc@11230000 {
 		clocks = <&pericfg CLK_PERI_MSDC30_0_PD>,
 			 <&topckgen CLK_TOP_MSDC50_0_SEL>;
 		clock-names = "source", "hclk";
+		resets = <&pericfg MT7622_PERI_MSDC0_SW_RST>;
+		reset-names = "hrst";
 		status = "disabled";
 	};
 
-- 
GitLab


From 20934c0de13b49a072fb1e0ca79fe0fe0e40eae5 Mon Sep 17 00:00:00 2001
From: Alan Stern <stern@rowland.harvard.edu>
Date: Wed, 26 Aug 2020 10:32:29 -0400
Subject: [PATCH 0778/1341] usb: storage: Add unusual_uas entry for Sony PSZ
 drives
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The PSZ-HA* family of USB disk drives from Sony can't handle the
REPORT OPCODES command when using the UAS protocol.  This patch adds
an appropriate quirks entry.

Reported-and-tested-by: Till Dörges <doerges@pre-sense.de>
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200826143229.GB400430@rowland.harvard.edu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/storage/unusual_uas.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/usb/storage/unusual_uas.h b/drivers/usb/storage/unusual_uas.h
index 971f8a4354c8c..711ab240058c7 100644
--- a/drivers/usb/storage/unusual_uas.h
+++ b/drivers/usb/storage/unusual_uas.h
@@ -28,6 +28,13 @@
  * and don't forget to CC: the USB development list <linux-usb@vger.kernel.org>
  */
 
+/* Reported-by: Till Dörges <doerges@pre-sense.de> */
+UNUSUAL_DEV(0x054c, 0x087d, 0x0000, 0x9999,
+		"Sony",
+		"PSZ-HA*",
+		USB_SC_DEVICE, USB_PR_DEVICE, NULL,
+		US_FL_NO_REPORT_OPCODES),
+
 /* Reported-by: Julian Groß <julian.g@posteo.de> */
 UNUSUAL_DEV(0x059f, 0x105f, 0x0000, 0x9999,
 		"LaCie",
-- 
GitLab


From e33588adcaa925c18ee2ea253161fb0317fa2329 Mon Sep 17 00:00:00 2001
From: Sowjanya Komatineni <skomatineni@nvidia.com>
Date: Thu, 27 Aug 2020 10:20:55 -0700
Subject: [PATCH 0779/1341] sdhci: tegra: Remove
 SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK for Tegra210

commit b5a84ecf025a ("mmc: tegra: Add Tegra210 support")

SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK is set for Tegra210 from the
beginning of Tegra210 support in the driver.

Tegra210 SDMMC hardware by default uses timeout clock (TMCLK)
instead of SDCLK and this quirk should not be set.

So, this patch remove this quirk for Tegra210.

Fixes: b5a84ecf025a ("mmc: tegra: Add Tegra210 support")
Cc: stable <stable@vger.kernel.org> # 5.4
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1598548861-32373-2-git-send-email-skomatineni@nvidia.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/sdhci-tegra.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 0a3f9d024f2ab..2be3511cc7734 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -1418,7 +1418,6 @@ static const struct sdhci_ops tegra210_sdhci_ops = {
 
 static const struct sdhci_pltfm_data sdhci_tegra210_pdata = {
 	.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
-		  SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
 		  SDHCI_QUIRK_SINGLE_POWER_WRITE |
 		  SDHCI_QUIRK_NO_HISPD_BIT |
 		  SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
-- 
GitLab


From 391d89dba8c290859a3e29430d0b9e32c358bb0d Mon Sep 17 00:00:00 2001
From: Sowjanya Komatineni <skomatineni@nvidia.com>
Date: Thu, 27 Aug 2020 10:20:56 -0700
Subject: [PATCH 0780/1341] sdhci: tegra: Remove
 SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK for Tegra186

commit 4346b7c7941d ("mmc: tegra: Add Tegra186 support")

SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK is set for Tegra186 from the
beginning of its support in driver.

Tegra186 SDMMC hardware by default uses timeout clock (TMCLK) instead
of SDCLK and this quirk should not be set.

So, this patch remove this quirk for Tegra186.

Fixes: 4346b7c7941d ("mmc: tegra: Add Tegra186 support")
Cc: stable <stable@vger.kernel.org> # 5.4
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1598548861-32373-3-git-send-email-skomatineni@nvidia.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/sdhci-tegra.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 2be3511cc7734..31ed32101055a 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -1455,7 +1455,6 @@ static const struct sdhci_ops tegra186_sdhci_ops = {
 
 static const struct sdhci_pltfm_data sdhci_tegra186_pdata = {
 	.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
-		  SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
 		  SDHCI_QUIRK_SINGLE_POWER_WRITE |
 		  SDHCI_QUIRK_NO_HISPD_BIT |
 		  SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
-- 
GitLab


From f7f86e8ac0ad7cd6792a80137f5a550924966916 Mon Sep 17 00:00:00 2001
From: Sowjanya Komatineni <skomatineni@nvidia.com>
Date: Thu, 27 Aug 2020 10:20:57 -0700
Subject: [PATCH 0781/1341] dt-bindings: mmc: tegra: Add tmclk for Tegra210 and
 later

commit b5a84ecf025a ("mmc: tegra: Add Tegra210 support")

Tegra210 and later uses separate SDMMC_LEGACY_TM clock for data
timeout.

So, this patch adds "tmclk" to Tegra sdhci clock property in the
device tree binding.

Fixes: b5a84ecf025a ("mmc: tegra: Add Tegra210 support")
Cc: stable <stable@vger.kernel.org> # 5.4
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1598548861-32373-4-git-send-email-skomatineni@nvidia.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 .../bindings/mmc/nvidia,tegra20-sdhci.txt     | 32 +++++++++++++++++--
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
index 2cf3affa1be70..96c0b1440c9c5 100644
--- a/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/nvidia,tegra20-sdhci.txt
@@ -15,8 +15,15 @@ Required properties:
   - "nvidia,tegra210-sdhci": for Tegra210
   - "nvidia,tegra186-sdhci": for Tegra186
   - "nvidia,tegra194-sdhci": for Tegra194
-- clocks : Must contain one entry, for the module clock.
-  See ../clocks/clock-bindings.txt for details.
+- clocks: For Tegra210, Tegra186 and Tegra194 must contain two entries.
+	  One for the module clock and one for the timeout clock.
+	  For all other Tegra devices, must contain a single entry for
+	  the module clock. See ../clocks/clock-bindings.txt for details.
+- clock-names: For Tegra210, Tegra186 and Tegra194 must contain the
+	       strings 'sdhci' and 'tmclk' to represent the module and
+	       the timeout clocks, respectively.
+	       For all other Tegra devices must contain the string 'sdhci'
+	       to represent the module clock.
 - resets : Must contain an entry for each entry in reset-names.
   See ../reset/reset.txt for details.
 - reset-names : Must include the following entries:
@@ -99,7 +106,7 @@ Optional properties for Tegra210, Tegra186 and Tegra194:
 
 Example:
 sdhci@700b0000 {
-	compatible = "nvidia,tegra210-sdhci", "nvidia,tegra124-sdhci";
+	compatible = "nvidia,tegra124-sdhci";
 	reg = <0x0 0x700b0000 0x0 0x200>;
 	interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
 	clocks = <&tegra_car TEGRA210_CLK_SDMMC1>;
@@ -115,3 +122,22 @@ sdhci@700b0000 {
 	nvidia,pad-autocal-pull-down-offset-1v8 = <0x7b>;
 	status = "disabled";
 };
+
+sdhci@700b0000 {
+	compatible = "nvidia,tegra210-sdhci";
+	reg = <0x0 0x700b0000 0x0 0x200>;
+	interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&tegra_car TEGRA210_CLK_SDMMC1>,
+		 <&tegra_car TEGRA210_CLK_SDMMC_LEGACY>;
+	clock-names = "sdhci", "tmclk";
+	resets = <&tegra_car 14>;
+	reset-names = "sdhci";
+	pinctrl-names = "sdmmc-3v3", "sdmmc-1v8";
+	pinctrl-0 = <&sdmmc1_3v3>;
+	pinctrl-1 = <&sdmmc1_1v8>;
+	nvidia,pad-autocal-pull-up-offset-3v3 = <0x00>;
+	nvidia,pad-autocal-pull-down-offset-3v3 = <0x7d>;
+	nvidia,pad-autocal-pull-up-offset-1v8 = <0x7b>;
+	nvidia,pad-autocal-pull-down-offset-1v8 = <0x7b>;
+	status = "disabled";
+};
-- 
GitLab


From 679f71fa0db2d777f39c7a5af7f7c0689fc713fa Mon Sep 17 00:00:00 2001
From: Sowjanya Komatineni <skomatineni@nvidia.com>
Date: Thu, 27 Aug 2020 10:20:58 -0700
Subject: [PATCH 0782/1341] arm64: tegra: Add missing timeout clock to Tegra210
 SDMMC

commit 742af7e7a0a1 ("arm64: tegra: Add Tegra210 support")

Tegra210 uses separate SDMMC_LEGACY_TM clock for data timeout and
this clock is not enabled currently which is not recommended.

Tegra SDMMC advertises 12Mhz as timeout clock frequency in host
capability register.

So, this clock should be kept enabled by SDMMC driver.

Fixes: 742af7e7a0a1 ("arm64: tegra: Add Tegra210 support")
Cc: stable <stable@vger.kernel.org> # 5.4
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1598548861-32373-5-git-send-email-skomatineni@nvidia.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 arch/arm64/boot/dts/nvidia/tegra210.dtsi | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/nvidia/tegra210.dtsi b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
index 829f786af1338..8cca2166a446a 100644
--- a/arch/arm64/boot/dts/nvidia/tegra210.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra210.dtsi
@@ -1194,8 +1194,9 @@ mmc@700b0000 {
 		compatible = "nvidia,tegra210-sdhci";
 		reg = <0x0 0x700b0000 0x0 0x200>;
 		interrupts = <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&tegra_car TEGRA210_CLK_SDMMC1>;
-		clock-names = "sdhci";
+		clocks = <&tegra_car TEGRA210_CLK_SDMMC1>,
+			 <&tegra_car TEGRA210_CLK_SDMMC_LEGACY>;
+		clock-names = "sdhci", "tmclk";
 		resets = <&tegra_car 14>;
 		reset-names = "sdhci";
 		pinctrl-names = "sdmmc-3v3", "sdmmc-1v8",
@@ -1222,8 +1223,9 @@ mmc@700b0200 {
 		compatible = "nvidia,tegra210-sdhci";
 		reg = <0x0 0x700b0200 0x0 0x200>;
 		interrupts = <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&tegra_car TEGRA210_CLK_SDMMC2>;
-		clock-names = "sdhci";
+		clocks = <&tegra_car TEGRA210_CLK_SDMMC2>,
+			 <&tegra_car TEGRA210_CLK_SDMMC_LEGACY>;
+		clock-names = "sdhci", "tmclk";
 		resets = <&tegra_car 9>;
 		reset-names = "sdhci";
 		pinctrl-names = "sdmmc-1v8-drv";
@@ -1239,8 +1241,9 @@ mmc@700b0400 {
 		compatible = "nvidia,tegra210-sdhci";
 		reg = <0x0 0x700b0400 0x0 0x200>;
 		interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&tegra_car TEGRA210_CLK_SDMMC3>;
-		clock-names = "sdhci";
+		clocks = <&tegra_car TEGRA210_CLK_SDMMC3>,
+			 <&tegra_car TEGRA210_CLK_SDMMC_LEGACY>;
+		clock-names = "sdhci", "tmclk";
 		resets = <&tegra_car 69>;
 		reset-names = "sdhci";
 		pinctrl-names = "sdmmc-3v3", "sdmmc-1v8",
@@ -1262,8 +1265,9 @@ mmc@700b0600 {
 		compatible = "nvidia,tegra210-sdhci";
 		reg = <0x0 0x700b0600 0x0 0x200>;
 		interrupts = <GIC_SPI 31 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&tegra_car TEGRA210_CLK_SDMMC4>;
-		clock-names = "sdhci";
+		clocks = <&tegra_car TEGRA210_CLK_SDMMC4>,
+			 <&tegra_car TEGRA210_CLK_SDMMC_LEGACY>;
+		clock-names = "sdhci", "tmclk";
 		resets = <&tegra_car 15>;
 		reset-names = "sdhci";
 		pinctrl-names = "sdmmc-3v3-drv", "sdmmc-1v8-drv";
-- 
GitLab


From baba217d2c4446b6eef309d81d8776cb5c68cb55 Mon Sep 17 00:00:00 2001
From: Sowjanya Komatineni <skomatineni@nvidia.com>
Date: Thu, 27 Aug 2020 10:20:59 -0700
Subject: [PATCH 0783/1341] arm64: tegra: Add missing timeout clock to Tegra186
 SDMMC nodes

commit 39cb62cb8973 ("arm64: tegra: Add Tegra186 support")

Tegra186 uses separate SDMMC_LEGACY_TM clock for data timeout and
this clock is not enabled currently which is not recommended.

Tegra186 SDMMC advertises 12Mhz as timeout clock frequency in host
capability register and uses it by default.

So, this clock should be kept enabled by the SDMMC driver.

Fixes: 39cb62cb8973 ("arm64: tegra: Add Tegra186 support")
Cc: stable <stable@vger.kernel.org> # 5.4
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1598548861-32373-6-git-send-email-skomatineni@nvidia.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 arch/arm64/boot/dts/nvidia/tegra186.dtsi | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/nvidia/tegra186.dtsi b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
index 34d249d85da76..8eb61dd9921eb 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra186.dtsi
@@ -337,8 +337,9 @@ sdmmc1: mmc@3400000 {
 		compatible = "nvidia,tegra186-sdhci";
 		reg = <0x0 0x03400000 0x0 0x10000>;
 		interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&bpmp TEGRA186_CLK_SDMMC1>;
-		clock-names = "sdhci";
+		clocks = <&bpmp TEGRA186_CLK_SDMMC1>,
+			 <&bpmp TEGRA186_CLK_SDMMC_LEGACY_TM>;
+		clock-names = "sdhci", "tmclk";
 		resets = <&bpmp TEGRA186_RESET_SDMMC1>;
 		reset-names = "sdhci";
 		interconnects = <&mc TEGRA186_MEMORY_CLIENT_SDMMCRA &emc>,
@@ -366,8 +367,9 @@ sdmmc2: mmc@3420000 {
 		compatible = "nvidia,tegra186-sdhci";
 		reg = <0x0 0x03420000 0x0 0x10000>;
 		interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&bpmp TEGRA186_CLK_SDMMC2>;
-		clock-names = "sdhci";
+		clocks = <&bpmp TEGRA186_CLK_SDMMC2>,
+			 <&bpmp TEGRA186_CLK_SDMMC_LEGACY_TM>;
+		clock-names = "sdhci", "tmclk";
 		resets = <&bpmp TEGRA186_RESET_SDMMC2>;
 		reset-names = "sdhci";
 		interconnects = <&mc TEGRA186_MEMORY_CLIENT_SDMMCRAA &emc>,
@@ -390,8 +392,9 @@ sdmmc3: mmc@3440000 {
 		compatible = "nvidia,tegra186-sdhci";
 		reg = <0x0 0x03440000 0x0 0x10000>;
 		interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&bpmp TEGRA186_CLK_SDMMC3>;
-		clock-names = "sdhci";
+		clocks = <&bpmp TEGRA186_CLK_SDMMC3>,
+			 <&bpmp TEGRA186_CLK_SDMMC_LEGACY_TM>;
+		clock-names = "sdhci", "tmclk";
 		resets = <&bpmp TEGRA186_RESET_SDMMC3>;
 		reset-names = "sdhci";
 		interconnects = <&mc TEGRA186_MEMORY_CLIENT_SDMMCR &emc>,
@@ -416,8 +419,9 @@ sdmmc4: mmc@3460000 {
 		compatible = "nvidia,tegra186-sdhci";
 		reg = <0x0 0x03460000 0x0 0x10000>;
 		interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
-		clocks = <&bpmp TEGRA186_CLK_SDMMC4>;
-		clock-names = "sdhci";
+		clocks = <&bpmp TEGRA186_CLK_SDMMC4>,
+			 <&bpmp TEGRA186_CLK_SDMMC_LEGACY_TM>;
+		clock-names = "sdhci", "tmclk";
 		assigned-clocks = <&bpmp TEGRA186_CLK_SDMMC4>,
 				  <&bpmp TEGRA186_CLK_PLLC4_VCO>;
 		assigned-clock-parents = <&bpmp TEGRA186_CLK_PLLC4_VCO>;
-- 
GitLab


From c956c0cd4f6f4aac4f095621b1c4e1c5ee1df877 Mon Sep 17 00:00:00 2001
From: Sowjanya Komatineni <skomatineni@nvidia.com>
Date: Thu, 27 Aug 2020 10:21:00 -0700
Subject: [PATCH 0784/1341] arm64: tegra: Add missing timeout clock to Tegra194
 SDMMC nodes

commit 5425fb15d8ee ("arm64: tegra: Add Tegra194 chip device tree")

Tegra194 uses separate SDMMC_LEGACY_TM clock for data timeout and
this clock is not enabled currently which is not recommended.

Tegra194 SDMMC advertises 12Mhz as timeout clock frequency in host
capability register.

So, this clock should be kept enabled by SDMMC driver.

Fixes: 5425fb15d8ee ("arm64: tegra: Add Tegra194 chip device tree")
Cc: stable <stable@vger.kernel.org> # 5.4
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1598548861-32373-7-git-send-email-skomatineni@nvidia.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 48160f48003aa..ca5cb6aef5ee4 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -460,8 +460,9 @@ sdmmc1: mmc@3400000 {
 			compatible = "nvidia,tegra194-sdhci";
 			reg = <0x03400000 0x10000>;
 			interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
-			clocks = <&bpmp TEGRA194_CLK_SDMMC1>;
-			clock-names = "sdhci";
+			clocks = <&bpmp TEGRA194_CLK_SDMMC1>,
+				 <&bpmp TEGRA194_CLK_SDMMC_LEGACY_TM>;
+			clock-names = "sdhci", "tmclk";
 			resets = <&bpmp TEGRA194_RESET_SDMMC1>;
 			reset-names = "sdhci";
 			interconnects = <&mc TEGRA194_MEMORY_CLIENT_SDMMCRA &emc>,
@@ -485,8 +486,9 @@ sdmmc3: mmc@3440000 {
 			compatible = "nvidia,tegra194-sdhci";
 			reg = <0x03440000 0x10000>;
 			interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
-			clocks = <&bpmp TEGRA194_CLK_SDMMC3>;
-			clock-names = "sdhci";
+			clocks = <&bpmp TEGRA194_CLK_SDMMC3>,
+				 <&bpmp TEGRA194_CLK_SDMMC_LEGACY_TM>;
+			clock-names = "sdhci", "tmclk";
 			resets = <&bpmp TEGRA194_RESET_SDMMC3>;
 			reset-names = "sdhci";
 			interconnects = <&mc TEGRA194_MEMORY_CLIENT_SDMMCR &emc>,
@@ -511,8 +513,9 @@ sdmmc4: mmc@3460000 {
 			compatible = "nvidia,tegra194-sdhci";
 			reg = <0x03460000 0x10000>;
 			interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
-			clocks = <&bpmp TEGRA194_CLK_SDMMC4>;
-			clock-names = "sdhci";
+			clocks = <&bpmp TEGRA194_CLK_SDMMC4>,
+				 <&bpmp TEGRA194_CLK_SDMMC_LEGACY_TM>;
+			clock-names = "sdhci", "tmclk";
 			assigned-clocks = <&bpmp TEGRA194_CLK_SDMMC4>,
 					  <&bpmp TEGRA194_CLK_PLLC4>;
 			assigned-clock-parents =
-- 
GitLab


From 8048822bac01936fda2c7b924a52131da81e6198 Mon Sep 17 00:00:00 2001
From: Sowjanya Komatineni <skomatineni@nvidia.com>
Date: Thu, 27 Aug 2020 10:21:01 -0700
Subject: [PATCH 0785/1341] sdhci: tegra: Add missing TMCLK for data timeout

commit b5a84ecf025a ("mmc: tegra: Add Tegra210 support")

Tegra210 and later has a separate sdmmc_legacy_tm (TMCLK) used by Tegra
SDMMC hawdware for data timeout to achive better timeout than using
SDCLK and using TMCLK is recommended.

USE_TMCLK_FOR_DATA_TIMEOUT bit in Tegra SDMMC register
SDHCI_TEGRA_VENDOR_SYS_SW_CTRL can be used to choose either TMCLK or
SDCLK for data timeout.

Default USE_TMCLK_FOR_DATA_TIMEOUT bit is set to 1 and TMCLK is used
for data timeout by Tegra SDMMC hardware and having TMCLK not enabled
is not recommended.

So, this patch adds quirk NVQUIRK_HAS_TMCLK for SoC having separate
timeout clock and keeps TMCLK enabled all the time.

Fixes: b5a84ecf025a ("mmc: tegra: Add Tegra210 support")
Cc: stable <stable@vger.kernel.org> # 5.4
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1598548861-32373-8-git-send-email-skomatineni@nvidia.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/sdhci-tegra.c | 53 ++++++++++++++++++++++++++++++++--
 1 file changed, 51 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 31ed32101055a..13fbf70b5fde3 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -110,6 +110,12 @@
 #define NVQUIRK_DIS_CARD_CLK_CONFIG_TAP			BIT(8)
 #define NVQUIRK_CQHCI_DCMD_R1B_CMD_TIMING		BIT(9)
 
+/*
+ * NVQUIRK_HAS_TMCLK is for SoC's having separate timeout clock for Tegra
+ * SDMMC hardware data timeout.
+ */
+#define NVQUIRK_HAS_TMCLK				BIT(10)
+
 /* SDMMC CQE Base Address for Tegra Host Ver 4.1 and Higher */
 #define SDHCI_TEGRA_CQE_BASE_ADDR			0xF000
 
@@ -140,6 +146,7 @@ struct sdhci_tegra_autocal_offsets {
 struct sdhci_tegra {
 	const struct sdhci_tegra_soc_data *soc_data;
 	struct gpio_desc *power_gpio;
+	struct clk *tmclk;
 	bool ddr_signaling;
 	bool pad_calib_required;
 	bool pad_control_available;
@@ -1433,7 +1440,8 @@ static const struct sdhci_tegra_soc_data soc_data_tegra210 = {
 		    NVQUIRK_HAS_PADCALIB |
 		    NVQUIRK_DIS_CARD_CLK_CONFIG_TAP |
 		    NVQUIRK_ENABLE_SDR50 |
-		    NVQUIRK_ENABLE_SDR104,
+		    NVQUIRK_ENABLE_SDR104 |
+		    NVQUIRK_HAS_TMCLK,
 	.min_tap_delay = 106,
 	.max_tap_delay = 185,
 };
@@ -1471,6 +1479,7 @@ static const struct sdhci_tegra_soc_data soc_data_tegra186 = {
 		    NVQUIRK_DIS_CARD_CLK_CONFIG_TAP |
 		    NVQUIRK_ENABLE_SDR50 |
 		    NVQUIRK_ENABLE_SDR104 |
+		    NVQUIRK_HAS_TMCLK |
 		    NVQUIRK_CQHCI_DCMD_R1B_CMD_TIMING,
 	.min_tap_delay = 84,
 	.max_tap_delay = 136,
@@ -1483,7 +1492,8 @@ static const struct sdhci_tegra_soc_data soc_data_tegra194 = {
 		    NVQUIRK_HAS_PADCALIB |
 		    NVQUIRK_DIS_CARD_CLK_CONFIG_TAP |
 		    NVQUIRK_ENABLE_SDR50 |
-		    NVQUIRK_ENABLE_SDR104,
+		    NVQUIRK_ENABLE_SDR104 |
+		    NVQUIRK_HAS_TMCLK,
 	.min_tap_delay = 96,
 	.max_tap_delay = 139,
 };
@@ -1611,6 +1621,43 @@ static int sdhci_tegra_probe(struct platform_device *pdev)
 		goto err_power_req;
 	}
 
+	/*
+	 * Tegra210 has a separate SDMMC_LEGACY_TM clock used for host
+	 * timeout clock and SW can choose TMCLK or SDCLK for hardware
+	 * data timeout through the bit USE_TMCLK_FOR_DATA_TIMEOUT of
+	 * the register SDHCI_TEGRA_VENDOR_SYS_SW_CTRL.
+	 *
+	 * USE_TMCLK_FOR_DATA_TIMEOUT bit default is set to 1 and SDMMC uses
+	 * 12Mhz TMCLK which is advertised in host capability register.
+	 * With TMCLK of 12Mhz provides maximum data timeout period that can
+	 * be achieved is 11s better than using SDCLK for data timeout.
+	 *
+	 * So, TMCLK is set to 12Mhz and kept enabled all the time on SoC's
+	 * supporting separate TMCLK.
+	 */
+
+	if (soc_data->nvquirks & NVQUIRK_HAS_TMCLK) {
+		clk = devm_clk_get(&pdev->dev, "tmclk");
+		if (IS_ERR(clk)) {
+			rc = PTR_ERR(clk);
+			if (rc == -EPROBE_DEFER)
+				goto err_power_req;
+
+			dev_warn(&pdev->dev, "failed to get tmclk: %d\n", rc);
+			clk = NULL;
+		}
+
+		clk_set_rate(clk, 12000000);
+		rc = clk_prepare_enable(clk);
+		if (rc) {
+			dev_err(&pdev->dev,
+				"failed to enable tmclk: %d\n", rc);
+			goto err_power_req;
+		}
+
+		tegra_host->tmclk = clk;
+	}
+
 	clk = devm_clk_get(mmc_dev(host->mmc), NULL);
 	if (IS_ERR(clk)) {
 		rc = PTR_ERR(clk);
@@ -1654,6 +1701,7 @@ static int sdhci_tegra_probe(struct platform_device *pdev)
 err_rst_get:
 	clk_disable_unprepare(pltfm_host->clk);
 err_clk_get:
+	clk_disable_unprepare(tegra_host->tmclk);
 err_power_req:
 err_parse_dt:
 	sdhci_pltfm_free(pdev);
@@ -1671,6 +1719,7 @@ static int sdhci_tegra_remove(struct platform_device *pdev)
 	reset_control_assert(tegra_host->rst);
 	usleep_range(2000, 4000);
 	clk_disable_unprepare(pltfm_host->clk);
+	clk_disable_unprepare(tegra_host->tmclk);
 
 	sdhci_pltfm_free(pdev);
 
-- 
GitLab


From 22380b65dc70f5b132c5afdf6b4011e2a84ec34a Mon Sep 17 00:00:00 2001
From: Lee Jones <lee.jones@linaro.org>
Date: Wed, 19 Aug 2020 09:16:50 +0100
Subject: [PATCH 0786/1341] mfd: mfd-core: Ensure disabled devices are ignored
 without error

Commit e49aa9a9bd22 ("mfd: core: Make a best effort attempt to match
devices with the correct of_nodes") changed the semantics for disabled
devices in mfd_add_device().  Instead of silently ignoring a disabled
child device, an error was returned.  On receipt of the error
mfd_add_devices() the precedes to remove *all* child devices and
returns an all-failed error to the caller, which will inevitably fail
the parent device as well.

This patch reverts back to the old semantics and ignores child devices
which are disabled in Device Tree.

Fixes: e49aa9a9bd22 ("mfd: core: Make a best effort attempt to match devices with the correct of_nodes")
Reported-by: Icenowy Zheng <icenowy@aosc.io>
Tested-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/mfd/mfd-core.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index c50718e3db58d..fc00aaccb5f72 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -126,10 +126,6 @@ static int mfd_match_of_node_to_dev(struct platform_device *pdev,
 	const __be32 *reg;
 	u64 of_node_addr;
 
-	/* Skip devices 'disabled' by Device Tree */
-	if (!of_device_is_available(np))
-		return -ENODEV;
-
 	/* Skip if OF node has previously been allocated to a device */
 	list_for_each_entry(of_entry, &mfd_of_node_list, list)
 		if (of_entry->np == np)
@@ -212,6 +208,12 @@ static int mfd_add_device(struct device *parent, int id,
 	if (IS_ENABLED(CONFIG_OF) && parent->of_node && cell->of_compatible) {
 		for_each_child_of_node(parent->of_node, np) {
 			if (of_device_is_compatible(np, cell->of_compatible)) {
+				/* Ignore 'disabled' devices error free */
+				if (!of_device_is_available(np)) {
+					ret = 0;
+					goto fail_alias;
+				}
+
 				ret = mfd_match_of_node_to_dev(pdev, np, cell);
 				if (ret == -EAGAIN)
 					continue;
-- 
GitLab


From bca82e3557ee1fbfbdacb09033a2d81ac76c86eb Mon Sep 17 00:00:00 2001
From: Jacopo Mondi <jacopo+renesas@jmondi.org>
Date: Mon, 22 Jun 2020 18:43:52 +0200
Subject: [PATCH 0787/1341] media: i2c: imx214: select V4L2_FWNODE

After the recent conversion of the media build infrastructure to select
V4L2 components instead of depending on their presence, which took place
in:
32a363d0b0b14 ("media: Kconfig files: use select for V4L2 subdevs and MC")

imx214 stands out as being the (only?) media I2C driver that still depends
on a V4L2 core symbol instead of selecting it.

This confuses the build system which claims it has detected a circular
dependency when other drivers select the same symbol as the imx214
driver does.

drivers/media/i2c/Kconfig:728:error: recursive dependency detected!
drivers/media/i2c/Kconfig:728:	symbol VIDEO_IMX214 depends on V4L2_FWNODE
drivers/media/v4l2-core/Kconfig:71:	symbol V4L2_FWNODE is selected by VIDEO_BCM2835_UNICAM
drivers/media/platform/bcm2835/Kconfig:3:	symbol VIDEO_BCM2835_UNICAM depends on VIDEO_V4L2_SUBDEV_API
drivers/media/v4l2-core/Kconfig:19:	symbol VIDEO_V4L2_SUBDEV_API depends on MEDIA_CONTROLLER
drivers/media/Kconfig:168:	symbol MEDIA_CONTROLLER is selected by VIDEO_IMX214

Fix this by making the imx214 driver select V4L2_FWNODE instead of
depending on it and align it with all the other drivers.

Fixes: 32a363d0b0b14 ("media: Kconfig files: use select for V4L2 subdevs and MC")
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/i2c/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index 48ae60a2c6030..fa5b7e04d1fc6 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -741,7 +741,7 @@ config VIDEO_HI556
 config VIDEO_IMX214
 	tristate "Sony IMX214 sensor support"
 	depends on GPIOLIB && I2C && VIDEO_V4L2
-	depends on V4L2_FWNODE
+	select V4L2_FWNODE
 	select MEDIA_CONTROLLER
 	select VIDEO_V4L2_SUBDEV_API
 	select REGMAP_I2C
-- 
GitLab


From 8a30c017c99603b216907c2f7aa22d3afe4137c3 Mon Sep 17 00:00:00 2001
From: Sakari Ailus <sakari.ailus@linux.intel.com>
Date: Mon, 3 Aug 2020 11:07:06 +0200
Subject: [PATCH 0788/1341] media: max9286: Depend on OF_GPIO

The driver expects struct gpio_chip has of_node field and that field is
only there if CONFIG_OF_GPIO is defined. Fix this by changing the OF
dependency to OF_GPIO.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/i2c/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/i2c/Kconfig b/drivers/media/i2c/Kconfig
index fa5b7e04d1fc6..c7ba76fee599a 100644
--- a/drivers/media/i2c/Kconfig
+++ b/drivers/media/i2c/Kconfig
@@ -467,7 +467,7 @@ config VIDEO_VPX3220
 config VIDEO_MAX9286
 	tristate "Maxim MAX9286 GMSL deserializer support"
 	depends on I2C && I2C_MUX
-	depends on OF
+	depends on OF_GPIO
 	select V4L2_FWNODE
 	select VIDEO_V4L2_SUBDEV_API
 	select MEDIA_CONTROLLER
-- 
GitLab


From 4965b8cd1bc1ffb017e5c58e622da82b55e49414 Mon Sep 17 00:00:00 2001
From: Prateek Sood <prsood@codeaurora.org>
Date: Fri, 21 Aug 2020 02:27:50 +0530
Subject: [PATCH 0789/1341] firmware_loader: fix memory leak for paged buffer

vfree() is being called on paged buffer allocated
using alloc_page() and mapped using vmap().

Freeing of pages in vfree() relies on nr_pages of
struct vm_struct. vmap() does not update nr_pages.
It can lead to memory leaks.

Fixes: ddaf29fd9bb6 ("firmware: Free temporary page table after vmapping")
Signed-off-by: Prateek Sood <prsood@codeaurora.org>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1597957070-27185-1-git-send-email-prsood@codeaurora.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/base/firmware_loader/firmware.h |  2 ++
 drivers/base/firmware_loader/main.c     | 17 +++++++++++------
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/drivers/base/firmware_loader/firmware.h b/drivers/base/firmware_loader/firmware.h
index 933e2192fbe8a..d08efc77cf16a 100644
--- a/drivers/base/firmware_loader/firmware.h
+++ b/drivers/base/firmware_loader/firmware.h
@@ -142,10 +142,12 @@ int assign_fw(struct firmware *fw, struct device *device, u32 opt_flags);
 void fw_free_paged_buf(struct fw_priv *fw_priv);
 int fw_grow_paged_buf(struct fw_priv *fw_priv, int pages_needed);
 int fw_map_paged_buf(struct fw_priv *fw_priv);
+bool fw_is_paged_buf(struct fw_priv *fw_priv);
 #else
 static inline void fw_free_paged_buf(struct fw_priv *fw_priv) {}
 static inline int fw_grow_paged_buf(struct fw_priv *fw_priv, int pages_needed) { return -ENXIO; }
 static inline int fw_map_paged_buf(struct fw_priv *fw_priv) { return -ENXIO; }
+static inline bool fw_is_paged_buf(struct fw_priv *fw_priv) { return false; }
 #endif
 
 #endif /* __FIRMWARE_LOADER_H */
diff --git a/drivers/base/firmware_loader/main.c b/drivers/base/firmware_loader/main.c
index 9da0c9d5f538e..63b9714a01548 100644
--- a/drivers/base/firmware_loader/main.c
+++ b/drivers/base/firmware_loader/main.c
@@ -252,9 +252,11 @@ static void __free_fw_priv(struct kref *ref)
 	list_del(&fw_priv->list);
 	spin_unlock(&fwc->lock);
 
-	fw_free_paged_buf(fw_priv); /* free leftover pages */
-	if (!fw_priv->allocated_size)
+	if (fw_is_paged_buf(fw_priv))
+		fw_free_paged_buf(fw_priv);
+	else if (!fw_priv->allocated_size)
 		vfree(fw_priv->data);
+
 	kfree_const(fw_priv->fw_name);
 	kfree(fw_priv);
 }
@@ -268,6 +270,11 @@ static void free_fw_priv(struct fw_priv *fw_priv)
 }
 
 #ifdef CONFIG_FW_LOADER_PAGED_BUF
+bool fw_is_paged_buf(struct fw_priv *fw_priv)
+{
+	return fw_priv->is_paged_buf;
+}
+
 void fw_free_paged_buf(struct fw_priv *fw_priv)
 {
 	int i;
@@ -275,6 +282,8 @@ void fw_free_paged_buf(struct fw_priv *fw_priv)
 	if (!fw_priv->pages)
 		return;
 
+	vunmap(fw_priv->data);
+
 	for (i = 0; i < fw_priv->nr_pages; i++)
 		__free_page(fw_priv->pages[i]);
 	kvfree(fw_priv->pages);
@@ -328,10 +337,6 @@ int fw_map_paged_buf(struct fw_priv *fw_priv)
 	if (!fw_priv->data)
 		return -ENOMEM;
 
-	/* page table is no longer needed after mapping, let's free */
-	kvfree(fw_priv->pages);
-	fw_priv->pages = NULL;
-
 	return 0;
 }
 #endif
-- 
GitLab


From 103a8542cb35b5130f732d00b0419a594ba1b517 Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Date: Fri, 28 Aug 2020 15:38:52 +0530
Subject: [PATCH 0790/1341] powerpc/book3s64/radix: Fix boot failure with large
 amount of guest memory

If the hypervisor doesn't support hugepages, the kernel ends up allocating a large
number of page table pages. The early page table allocation was wrongly
setting the max memblock limit to ppc64_rma_size with radix translation
which resulted in boot failure as shown below.

Kernel panic - not syncing:
early_alloc_pgtable: Failed to allocate 16777216 bytes align=0x1000000 nid=-1 from=0x0000000000000000 max_addr=0xffffffffffffffff
 CPU: 0 PID: 0 Comm: swapper Not tainted 5.8.0-24.9-default+ #2
 Call Trace:
 [c0000000016f3d00] [c0000000007c6470] dump_stack+0xc4/0x114 (unreliable)
 [c0000000016f3d40] [c00000000014c78c] panic+0x164/0x418
 [c0000000016f3dd0] [c000000000098890] early_alloc_pgtable+0xe0/0xec
 [c0000000016f3e60] [c0000000010a5440] radix__early_init_mmu+0x360/0x4b4
 [c0000000016f3ef0] [c000000001099bac] early_init_mmu+0x1c/0x3c
 [c0000000016f3f10] [c00000000109a320] early_setup+0x134/0x170

This was because the kernel was checking for the radix feature before we enable the
feature via mmu_features. This resulted in the kernel using hash restrictions on
radix.

Rework the early init code such that the kernel boot with memblock restrictions
as imposed by hash. At that point, the kernel still hasn't finalized the
translation the kernel will end up using.

We have three different ways of detecting radix.

1. dt_cpu_ftrs_scan -> used only in case of PowerNV
2. ibm,pa-features -> Used when we don't use cpu_dt_ftr_scan
3. CAS -> Where we negotiate with hypervisor about the supported translation.

We look at 1 or 2 early in the boot and after that, we look at the CAS vector to
finalize the translation the kernel will use. We also support a kernel command
line option (disable_radix) to switch to hash.

Update the memblock limit after mmu_early_init_devtree() if the kernel is going
to use radix translation. This forces some of the memblock allocations we do before
mmu_early_init_devtree() to be within the RMA limit.

Fixes: 2bfd65e45e87 ("powerpc/mm/radix: Add radix callbacks for early init routines")
Reported-by: Shirisha Ganta <shiganta@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Reviewed-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200828100852.426575-1-aneesh.kumar@linux.ibm.com
---
 arch/powerpc/include/asm/book3s/64/mmu.h | 10 +++++-----
 arch/powerpc/mm/book3s64/radix_pgtable.c | 15 ---------------
 arch/powerpc/mm/init_64.c                | 11 +++++++++--
 3 files changed, 14 insertions(+), 22 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/64/mmu.h b/arch/powerpc/include/asm/book3s/64/mmu.h
index 55442d45c5979..b392384a3b150 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu.h
@@ -239,14 +239,14 @@ static inline void early_init_mmu_secondary(void)
 
 extern void hash__setup_initial_memory_limit(phys_addr_t first_memblock_base,
 					 phys_addr_t first_memblock_size);
-extern void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base,
-					 phys_addr_t first_memblock_size);
 static inline void setup_initial_memory_limit(phys_addr_t first_memblock_base,
 					      phys_addr_t first_memblock_size)
 {
-	if (early_radix_enabled())
-		return radix__setup_initial_memory_limit(first_memblock_base,
-						   first_memblock_size);
+	/*
+	 * Hash has more strict restrictions. At this point we don't
+	 * know which translations we will pick. Hence go with hash
+	 * restrictions.
+	 */
 	return hash__setup_initial_memory_limit(first_memblock_base,
 					   first_memblock_size);
 }
diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index 28c784976beda..d5f0c10d752a3 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -734,21 +734,6 @@ void radix__mmu_cleanup_all(void)
 	}
 }
 
-void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base,
-				phys_addr_t first_memblock_size)
-{
-	/*
-	 * We don't currently support the first MEMBLOCK not mapping 0
-	 * physical on those processors
-	 */
-	BUG_ON(first_memblock_base != 0);
-
-	/*
-	 * Radix mode is not limited by RMA / VRMA addressing.
-	 */
-	ppc64_rma_size = ULONG_MAX;
-}
-
 #ifdef CONFIG_MEMORY_HOTPLUG
 static void free_pte_table(pte_t *pte_start, pmd_t *pmd)
 {
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 02e127fa5777c..8459056cce671 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -433,9 +433,16 @@ void __init mmu_early_init_devtree(void)
 	if (!(mfmsr() & MSR_HV))
 		early_check_vec5();
 
-	if (early_radix_enabled())
+	if (early_radix_enabled()) {
 		radix__early_init_devtree();
-	else
+		/*
+		 * We have finalized the translation we are going to use by now.
+		 * Radix mode is not limited by RMA / VRMA addressing.
+		 * Hence don't limit memblock allocations.
+		 */
+		ppc64_rma_size = ULONG_MAX;
+		memblock_set_current_limit(MEMBLOCK_ALLOC_ANYWHERE);
+	} else
 		hash__early_init_devtree();
 }
 #endif /* CONFIG_PPC_BOOK3S_64 */
-- 
GitLab


From 1764c3edc66880778604f5053fe2dda7b3ddd2c1 Mon Sep 17 00:00:00 2001
From: Sami Tolvanen <samitolvanen@google.com>
Date: Thu, 27 Aug 2020 13:36:08 -0700
Subject: [PATCH 0791/1341] arm64: use a common .arch preamble for inline
 assembly

Commit 7c78f67e9bd9 ("arm64: enable tlbi range instructions") breaks
LLVM's integrated assembler, because -Wa,-march is only passed to
external assemblers and therefore, the new instructions are not enabled
when IAS is used.

This change adds a common architecture version preamble, which can be
used in inline assembly blocks that contain instructions that require
a newer architecture version, and uses it to fix __TLBI_0 and __TLBI_1
with ARM64_TLB_RANGE.

Fixes: 7c78f67e9bd9 ("arm64: enable tlbi range instructions")
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/1106
Link: https://lore.kernel.org/r/20200827203608.1225689-1-samitolvanen@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/Makefile               | 11 ++++++++---
 arch/arm64/include/asm/compiler.h |  6 ++++++
 arch/arm64/include/asm/tlbflush.h |  6 ++++--
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index b45f0124cc16f..20ab5c9375a53 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -82,8 +82,8 @@ endif
 # compiler to generate them and consequently to break the single image contract
 # we pass it only to the assembler. This option is utilized only in case of non
 # integrated assemblers.
-ifneq ($(CONFIG_AS_HAS_ARMV8_4), y)
-branch-prot-flags-$(CONFIG_AS_HAS_PAC) += -Wa,-march=armv8.3-a
+ifeq ($(CONFIG_AS_HAS_PAC), y)
+asm-arch := armv8.3-a
 endif
 endif
 
@@ -91,7 +91,12 @@ KBUILD_CFLAGS += $(branch-prot-flags-y)
 
 ifeq ($(CONFIG_AS_HAS_ARMV8_4), y)
 # make sure to pass the newest target architecture to -march.
-KBUILD_CFLAGS	+= -Wa,-march=armv8.4-a
+asm-arch := armv8.4-a
+endif
+
+ifdef asm-arch
+KBUILD_CFLAGS	+= -Wa,-march=$(asm-arch) \
+		   -DARM64_ASM_ARCH='"$(asm-arch)"'
 endif
 
 ifeq ($(CONFIG_SHADOW_CALL_STACK), y)
diff --git a/arch/arm64/include/asm/compiler.h b/arch/arm64/include/asm/compiler.h
index 51a7ce87cdfe0..6fb2e6bcc392f 100644
--- a/arch/arm64/include/asm/compiler.h
+++ b/arch/arm64/include/asm/compiler.h
@@ -2,6 +2,12 @@
 #ifndef __ASM_COMPILER_H
 #define __ASM_COMPILER_H
 
+#ifdef ARM64_ASM_ARCH
+#define ARM64_ASM_PREAMBLE ".arch " ARM64_ASM_ARCH "\n"
+#else
+#define ARM64_ASM_PREAMBLE
+#endif
+
 /*
  * The EL0/EL1 pointer bits used by a pointer authentication code.
  * This is dependent on TBI0/TBI1 being enabled, or bits 63:56 would also apply.
diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h
index d493174415dbf..cc3f5a33ff9c5 100644
--- a/arch/arm64/include/asm/tlbflush.h
+++ b/arch/arm64/include/asm/tlbflush.h
@@ -28,14 +28,16 @@
  * not. The macros handles invoking the asm with or without the
  * register argument as appropriate.
  */
-#define __TLBI_0(op, arg) asm ("tlbi " #op "\n"				       \
+#define __TLBI_0(op, arg) asm (ARM64_ASM_PREAMBLE			       \
+			       "tlbi " #op "\n"				       \
 		   ALTERNATIVE("nop\n			nop",		       \
 			       "dsb ish\n		tlbi " #op,	       \
 			       ARM64_WORKAROUND_REPEAT_TLBI,		       \
 			       CONFIG_ARM64_WORKAROUND_REPEAT_TLBI)	       \
 			    : : )
 
-#define __TLBI_1(op, arg) asm ("tlbi " #op ", %0\n"			       \
+#define __TLBI_1(op, arg) asm (ARM64_ASM_PREAMBLE			       \
+			       "tlbi " #op ", %0\n"			       \
 		   ALTERNATIVE("nop\n			nop",		       \
 			       "dsb ish\n		tlbi " #op ", %0",     \
 			       ARM64_WORKAROUND_REPEAT_TLBI,		       \
-- 
GitLab


From 40b8b826a6998639dd1c26f0e127f18371e1058d Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 3 Aug 2020 11:27:06 +0300
Subject: [PATCH 0792/1341] kobject: Restore old behaviour of kobject_del(NULL)

The commit 079ad2fb4bf9 ("kobject: Avoid premature parent object freeing in
kobject_cleanup()") inadvertently dropped a possibility to call kobject_del()
with NULL pointer. Restore the old behaviour.

Fixes: 079ad2fb4bf9 ("kobject: Avoid premature parent object freeing in kobject_cleanup()")
Cc: stable <stable@vger.kernel.org>
Reported-by: Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Link: https://lore.kernel.org/r/20200803082706.65347-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 lib/kobject.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/kobject.c b/lib/kobject.c
index 3afb939f2a1cc..9dce68c378e61 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -637,8 +637,12 @@ static void __kobject_del(struct kobject *kobj)
  */
 void kobject_del(struct kobject *kobj)
 {
-	struct kobject *parent = kobj->parent;
+	struct kobject *parent;
+
+	if (!kobj)
+		return;
 
+	parent = kobj->parent;
 	__kobject_del(kobj);
 	kobject_put(parent);
 }
-- 
GitLab


From 20d9fdee72dfaa1fa7588c7a846283bd740e7157 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Thu, 27 Aug 2020 08:55:39 +0900
Subject: [PATCH 0793/1341] ASoC: soc-core: add snd_soc_find_dai_with_mutex()

commit 25612477d20b52 ("ASoC: soc-dai: set dai_link dpcm_ flags with a helper")
added snd_soc_dai_link_set_capabilities().
But it is using snd_soc_find_dai() (A) which is required client_mutex (B).
And client_mutex is soc-core.c local.

	struct snd_soc_dai *snd_soc_find_dai(xxx)
	{
		...
(B)		lockdep_assert_held(&client_mutex);
		...
	}

	void snd_soc_dai_link_set_capabilities(xxx)
	{
		...
		for_each_pcm_streams(direction) {
			...
			for_each_link_cpus(dai_link, i, cpu) {
(A)				dai = snd_soc_find_dai(cpu);
				...
			}
			...
			for_each_link_codecs(dai_link, i, codec) {
(A)				dai = snd_soc_find_dai(codec);
				...
			}
		}
		...
	}

Because of these background, we will get WARNING if .config has CONFIG_LOCKDEP.

	WARNING: CPU: 2 PID: 53 at sound/soc/soc-core.c:814 snd_soc_find_dai+0xf8/0x100
	CPU: 2 PID: 53 Comm: kworker/2:1 Not tainted 5.7.0-rc1+ #328
	Hardware name: Renesas H3ULCB Kingfisher board based on r8a77951 (DT)
	Workqueue: events deferred_probe_work_func
	pstate: 60000005 (nZCv daif -PAN -UAO)
	pc : snd_soc_find_dai+0xf8/0x100
	lr : snd_soc_find_dai+0xf4/0x100
	...
	Call trace:
	 snd_soc_find_dai+0xf8/0x100
	 snd_soc_dai_link_set_capabilities+0xa0/0x16c
	 graph_dai_link_of_dpcm+0x390/0x3c0
	 graph_for_each_link+0x134/0x200
	 graph_probe+0x144/0x230
	 platform_drv_probe+0x5c/0xb0
	 really_probe+0xe4/0x430
	 driver_probe_device+0x60/0xf4

snd_soc_find_dai() will be used from (X) CPU/Codec/Platform driver with
mutex lock, and (Y) Card driver without mutex lock.
This snd_soc_dai_link_set_capabilities() is for Card driver,
this means called without mutex.
This patch adds snd_soc_find_dai_with_mutex() to solve it.

Fixes: 25612477d20b52 ("ASoC: soc-dai: set dai_link dpcm_ flags with a helper")
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87blixvuab.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 include/sound/soc.h  |  2 ++
 sound/soc/soc-core.c | 13 +++++++++++++
 sound/soc/soc-dai.c  |  4 ++--
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 5e3919ffb00c5..4176071f61bfd 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1361,6 +1361,8 @@ void snd_soc_unregister_dai(struct snd_soc_dai *dai);
 
 struct snd_soc_dai *snd_soc_find_dai(
 	const struct snd_soc_dai_link_component *dlc);
+struct snd_soc_dai *snd_soc_find_dai_with_mutex(
+	const struct snd_soc_dai_link_component *dlc);
 
 #include <sound/soc-dai.h>
 
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 2fe1b2ec7c8fe..fe11856d7a639 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -834,6 +834,19 @@ struct snd_soc_dai *snd_soc_find_dai(
 }
 EXPORT_SYMBOL_GPL(snd_soc_find_dai);
 
+struct snd_soc_dai *snd_soc_find_dai_with_mutex(
+	const struct snd_soc_dai_link_component *dlc)
+{
+	struct snd_soc_dai *dai;
+
+	mutex_lock(&client_mutex);
+	dai = snd_soc_find_dai(dlc);
+	mutex_unlock(&client_mutex);
+
+	return dai;
+}
+EXPORT_SYMBOL_GPL(snd_soc_find_dai_with_mutex);
+
 static int soc_dai_link_sanity_check(struct snd_soc_card *card,
 				     struct snd_soc_dai_link *link)
 {
diff --git a/sound/soc/soc-dai.c b/sound/soc/soc-dai.c
index 91a2551e4cefe..0dbd312aad084 100644
--- a/sound/soc/soc-dai.c
+++ b/sound/soc/soc-dai.c
@@ -412,14 +412,14 @@ void snd_soc_dai_link_set_capabilities(struct snd_soc_dai_link *dai_link)
 		supported_codec = false;
 
 		for_each_link_cpus(dai_link, i, cpu) {
-			dai = snd_soc_find_dai(cpu);
+			dai = snd_soc_find_dai_with_mutex(cpu);
 			if (dai && snd_soc_dai_stream_valid(dai, direction)) {
 				supported_cpu = true;
 				break;
 			}
 		}
 		for_each_link_codecs(dai_link, i, codec) {
-			dai = snd_soc_find_dai(codec);
+			dai = snd_soc_find_dai_with_mutex(codec);
 			if (dai && snd_soc_dai_stream_valid(dai, direction)) {
 				supported_codec = true;
 				break;
-- 
GitLab


From fa4505675e093e895b7ec49a76d44f6b5ad9602e Mon Sep 17 00:00:00 2001
From: Jesper Dangaard Brouer <brouer@redhat.com>
Date: Wed, 26 Aug 2020 10:17:36 +0200
Subject: [PATCH 0794/1341] selftests/bpf: Fix massive output from test_maps

When stdout output from the selftests tool 'test_maps' gets redirected
into e.g file or pipe, then the output lines increase a lot (from 21
to 33949 lines).  This is caused by the printf that happens before the
fork() call, and there are user-space buffered printf data that seems
to be duplicated into the forked process.

To fix this fflush() stdout before the fork loop in __run_parallel().

Fixes: 1a97cf1fe503 ("selftests/bpf: speedup test_maps")
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/159842985651.1050885.2154399297503372406.stgit@firesoul
---
 tools/testing/selftests/bpf/test_maps.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/bpf/test_maps.c b/tools/testing/selftests/bpf/test_maps.c
index 754cf611723ee..0d92ebcb335d1 100644
--- a/tools/testing/selftests/bpf/test_maps.c
+++ b/tools/testing/selftests/bpf/test_maps.c
@@ -1274,6 +1274,8 @@ static void __run_parallel(unsigned int tasks,
 	pid_t pid[tasks];
 	int i;
 
+	fflush(stdout);
+
 	for (i = 0; i < tasks; i++) {
 		pid[i] = fork();
 		if (pid[i] == 0) {
-- 
GitLab


From 4f0835d6677dc69263f90f976524cb92b257d9f4 Mon Sep 17 00:00:00 2001
From: Sean Young <sean@mess.org>
Date: Sat, 8 Aug 2020 13:19:12 +0200
Subject: [PATCH 0795/1341] media: rc: uevent sysfs file races with
 rc_unregister_device()

Only report uevent file contents if device still registered, else we
might read freed memory.

Reported-by: syzbot+ceef16277388d6f24898@syzkaller.appspotmail.com
Cc: Hillf Danton <hdanton@sina.com>
Cc: <stable@vger.kernel.org> # 4.16+
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/rc/rc-main.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index 7b53066d9d07c..e1cda80a4b25b 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1601,25 +1601,25 @@ static void rc_dev_release(struct device *device)
 	kfree(dev);
 }
 
-#define ADD_HOTPLUG_VAR(fmt, val...)					\
-	do {								\
-		int err = add_uevent_var(env, fmt, val);		\
-		if (err)						\
-			return err;					\
-	} while (0)
-
 static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env)
 {
 	struct rc_dev *dev = to_rc_dev(device);
+	int ret = 0;
 
-	if (dev->rc_map.name)
-		ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name);
-	if (dev->driver_name)
-		ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name);
-	if (dev->device_name)
-		ADD_HOTPLUG_VAR("DEV_NAME=%s", dev->device_name);
+	mutex_lock(&dev->lock);
 
-	return 0;
+	if (!dev->registered)
+		ret = -ENODEV;
+	if (ret == 0 && dev->rc_map.name)
+		ret = add_uevent_var(env, "NAME=%s", dev->rc_map.name);
+	if (ret == 0 && dev->driver_name)
+		ret = add_uevent_var(env, "DRV_NAME=%s", dev->driver_name);
+	if (ret == 0 && dev->device_name)
+		ret = add_uevent_var(env, "DEV_NAME=%s", dev->device_name);
+
+	mutex_unlock(&dev->lock);
+
+	return ret;
 }
 
 /*
@@ -2011,14 +2011,14 @@ void rc_unregister_device(struct rc_dev *dev)
 	del_timer_sync(&dev->timer_keyup);
 	del_timer_sync(&dev->timer_repeat);
 
-	rc_free_rx_device(dev);
-
 	mutex_lock(&dev->lock);
 	if (dev->users && dev->close)
 		dev->close(dev);
 	dev->registered = false;
 	mutex_unlock(&dev->lock);
 
+	rc_free_rx_device(dev);
+
 	/*
 	 * lirc device should be freed with dev->registered = false, so
 	 * that userspace polling will get notified.
-- 
GitLab


From a2e2d73fa28136598e84db9d021091f1b98cbb1a Mon Sep 17 00:00:00 2001
From: Sean Young <sean@mess.org>
Date: Sat, 8 Aug 2020 13:38:02 +0200
Subject: [PATCH 0796/1341] media: rc: do not access device via sysfs after
 rc_unregister_device()

Device drivers do not expect to have change_protocol or wakeup
re-programming to be accesed after rc_unregister_device(). This can
cause the device driver to access deallocated resources.

Cc: <stable@vger.kernel.org> # 4.16+
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/rc/rc-main.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
index e1cda80a4b25b..dee8a9f3d80ac 100644
--- a/drivers/media/rc/rc-main.c
+++ b/drivers/media/rc/rc-main.c
@@ -1292,6 +1292,10 @@ static ssize_t store_protocols(struct device *device,
 	}
 
 	mutex_lock(&dev->lock);
+	if (!dev->registered) {
+		mutex_unlock(&dev->lock);
+		return -ENODEV;
+	}
 
 	old_protocols = *current_protocols;
 	new_protocols = old_protocols;
@@ -1430,6 +1434,10 @@ static ssize_t store_filter(struct device *device,
 		return -EINVAL;
 
 	mutex_lock(&dev->lock);
+	if (!dev->registered) {
+		mutex_unlock(&dev->lock);
+		return -ENODEV;
+	}
 
 	new_filter = *filter;
 	if (fattr->mask)
@@ -1544,6 +1552,10 @@ static ssize_t store_wakeup_protocols(struct device *device,
 	int i;
 
 	mutex_lock(&dev->lock);
+	if (!dev->registered) {
+		mutex_unlock(&dev->lock);
+		return -ENODEV;
+	}
 
 	allowed = dev->allowed_wakeup_protocols;
 
-- 
GitLab


From 1451b93223bbe3b4e9c91fca6b451d00667c5bf0 Mon Sep 17 00:00:00 2001
From: Sean Young <sean@mess.org>
Date: Thu, 13 Aug 2020 11:08:49 +0200
Subject: [PATCH 0797/1341] media: gpio-ir-tx: spinlock is not needed to
 disable interrupts

During bit-banging the IR on a gpio pin, we cannot be scheduled or have
anything interrupt us, else the generated signal will be incorrect.
Therefore, we need to disable interrupts on the local cpu. This also
disables preemption.

local_irq_disable() does exactly what we need and does not require a
spinlock.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/rc/gpio-ir-tx.c | 16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

diff --git a/drivers/media/rc/gpio-ir-tx.c b/drivers/media/rc/gpio-ir-tx.c
index f33b443bfa47b..c6cd2e6d8e654 100644
--- a/drivers/media/rc/gpio-ir-tx.c
+++ b/drivers/media/rc/gpio-ir-tx.c
@@ -19,8 +19,6 @@ struct gpio_ir {
 	struct gpio_desc *gpio;
 	unsigned int carrier;
 	unsigned int duty_cycle;
-	/* we need a spinlock to hold the cpu while transmitting */
-	spinlock_t lock;
 };
 
 static const struct of_device_id gpio_ir_tx_of_match[] = {
@@ -53,12 +51,11 @@ static int gpio_ir_tx_set_carrier(struct rc_dev *dev, u32 carrier)
 static void gpio_ir_tx_unmodulated(struct gpio_ir *gpio_ir, uint *txbuf,
 				   uint count)
 {
-	unsigned long flags;
 	ktime_t edge;
 	s32 delta;
 	int i;
 
-	spin_lock_irqsave(&gpio_ir->lock, flags);
+	local_irq_disable();
 
 	edge = ktime_get();
 
@@ -72,14 +69,11 @@ static void gpio_ir_tx_unmodulated(struct gpio_ir *gpio_ir, uint *txbuf,
 	}
 
 	gpiod_set_value(gpio_ir->gpio, 0);
-
-	spin_unlock_irqrestore(&gpio_ir->lock, flags);
 }
 
 static void gpio_ir_tx_modulated(struct gpio_ir *gpio_ir, uint *txbuf,
 				 uint count)
 {
-	unsigned long flags;
 	ktime_t edge;
 	/*
 	 * delta should never exceed 0.5 seconds (IR_MAX_DURATION) and on
@@ -95,7 +89,7 @@ static void gpio_ir_tx_modulated(struct gpio_ir *gpio_ir, uint *txbuf,
 	space = DIV_ROUND_CLOSEST((100 - gpio_ir->duty_cycle) *
 				  (NSEC_PER_SEC / 100), gpio_ir->carrier);
 
-	spin_lock_irqsave(&gpio_ir->lock, flags);
+	local_irq_disable();
 
 	edge = ktime_get();
 
@@ -128,19 +122,20 @@ static void gpio_ir_tx_modulated(struct gpio_ir *gpio_ir, uint *txbuf,
 			edge = last;
 		}
 	}
-
-	spin_unlock_irqrestore(&gpio_ir->lock, flags);
 }
 
 static int gpio_ir_tx(struct rc_dev *dev, unsigned int *txbuf,
 		      unsigned int count)
 {
 	struct gpio_ir *gpio_ir = dev->priv;
+	unsigned long flags;
 
+	local_irq_save(flags);
 	if (gpio_ir->carrier)
 		gpio_ir_tx_modulated(gpio_ir, txbuf, count);
 	else
 		gpio_ir_tx_unmodulated(gpio_ir, txbuf, count);
+	local_irq_restore(flags);
 
 	return count;
 }
@@ -176,7 +171,6 @@ static int gpio_ir_tx_probe(struct platform_device *pdev)
 
 	gpio_ir->carrier = 38000;
 	gpio_ir->duty_cycle = 50;
-	spin_lock_init(&gpio_ir->lock);
 
 	rc = devm_rc_register_device(&pdev->dev, rcdev);
 	if (rc < 0)
-- 
GitLab


From ddecfc76979d5585847c76c4c489dcac389f86dd Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Sat, 15 Aug 2020 08:12:37 +0200
Subject: [PATCH 0798/1341] media: mceusb: Avoid GFP_ATOMIC where it is not
 needed

There is no point in using GFP_ATOMIC here.
It is a probe function, and GFP_KERNEL is already used the line before
and the line after.

Use GFP_KERNEL instead.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/rc/mceusb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
index f9616158bcf44..98681ba10428b 100644
--- a/drivers/media/rc/mceusb.c
+++ b/drivers/media/rc/mceusb.c
@@ -1726,7 +1726,7 @@ static int mceusb_dev_probe(struct usb_interface *intf,
 		goto mem_alloc_fail;
 
 	ir->pipe_in = pipe;
-	ir->buf_in = usb_alloc_coherent(dev, maxp, GFP_ATOMIC, &ir->dma_in);
+	ir->buf_in = usb_alloc_coherent(dev, maxp, GFP_KERNEL, &ir->dma_in);
 	if (!ir->buf_in)
 		goto buf_in_alloc_fail;
 
-- 
GitLab


From 5d28ba5f8a0cfa3a874fa96c33731b8fcd141b3a Mon Sep 17 00:00:00 2001
From: Frank van der Linden <fllinden@amazon.com>
Date: Thu, 27 Aug 2020 23:40:12 +0000
Subject: [PATCH 0799/1341] arm64: vdso32: make vdso32 install conditional

vdso32 should only be installed if CONFIG_COMPAT_VDSO is enabled,
since it's not even supposed to be compiled otherwise, and arm64
builds without a 32bit crosscompiler will fail.

Fixes: 8d75785a8142 ("ARM64: vdso32: Install vdso32 from vdso_install")
Signed-off-by: Frank van der Linden <fllinden@amazon.com>
Cc: stable@vger.kernel.org [5.4+]
Link: https://lore.kernel.org/r/20200827234012.19757-1-fllinden@amazon.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/Makefile | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile
index 20ab5c9375a53..130569f90c54a 100644
--- a/arch/arm64/Makefile
+++ b/arch/arm64/Makefile
@@ -170,7 +170,8 @@ zinstall install:
 PHONY += vdso_install
 vdso_install:
 	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso $@
-	$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 $@
+	$(if $(CONFIG_COMPAT_VDSO), \
+		$(Q)$(MAKE) $(build)=arch/arm64/kernel/vdso32 $@)
 
 # We use MRPROPER_FILES and CLEAN_FILES now
 archclean:
-- 
GitLab


From 174bce38caf18b47816f352156fab926f4fe072a Mon Sep 17 00:00:00 2001
From: zhudi <zhudi21@huawei.com>
Date: Wed, 26 Aug 2020 20:01:13 +0800
Subject: [PATCH 0800/1341] netlink: fix a data race in netlink_rcv_wake()

The data races were reported by KCSAN:
BUG: KCSAN: data-race in netlink_recvmsg / skb_queue_tail

write (marked) to 0xffff8c0986e5a8c8 of 8 bytes by interrupt on cpu 3:
 skb_queue_tail+0xcc/0x120
 __netlink_sendskb+0x55/0x80
 netlink_broadcast_filtered+0x465/0x7e0
 nlmsg_notify+0x8f/0x120
 rtnl_notify+0x8e/0xb0
 __neigh_notify+0xf2/0x120
 neigh_update+0x927/0xde0
 arp_process+0x8a3/0xf50
 arp_rcv+0x27c/0x3b0
 __netif_receive_skb_core+0x181c/0x1840
 __netif_receive_skb+0x38/0xf0
 netif_receive_skb_internal+0x77/0x1c0
 napi_gro_receive+0x1bd/0x1f0
 e1000_clean_rx_irq+0x538/0xb20 [e1000]
 e1000_clean+0x5e4/0x1340 [e1000]
 net_rx_action+0x310/0x9d0
 __do_softirq+0xe8/0x308
 irq_exit+0x109/0x110
 do_IRQ+0x7f/0xe0
 ret_from_intr+0x0/0x1d
 0xffffffffffffffff

read to 0xffff8c0986e5a8c8 of 8 bytes by task 1463 on cpu 0:
 netlink_recvmsg+0x40b/0x820
 sock_recvmsg+0xc9/0xd0
 ___sys_recvmsg+0x1a4/0x3b0
 __sys_recvmsg+0x86/0x120
 __x64_sys_recvmsg+0x52/0x70
 do_syscall_64+0xb5/0x360
 entry_SYSCALL_64_after_hwframe+0x65/0xca
 0xffffffffffffffff

Since the write is under sk_receive_queue->lock but the read
is done as lockless. so fix it by using skb_queue_empty_lockless()
instead of skb_queue_empty() for the read in netlink_rcv_wake()

Signed-off-by: zhudi <zhudi21@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/netlink/af_netlink.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index b5f30d7d30d06..d2d1448274f56 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -353,7 +353,7 @@ static void netlink_rcv_wake(struct sock *sk)
 {
 	struct netlink_sock *nlk = nlk_sk(sk);
 
-	if (skb_queue_empty(&sk->sk_receive_queue))
+	if (skb_queue_empty_lockless(&sk->sk_receive_queue))
 		clear_bit(NETLINK_S_CONGESTED, &nlk->state);
 	if (!test_bit(NETLINK_S_CONGESTED, &nlk->state))
 		wake_up_interruptible(&nlk->wait);
-- 
GitLab


From f272285f6abb9178d029375599626baf3d5f4e8a Mon Sep 17 00:00:00 2001
From: Landen Chao <landen.chao@mediatek.com>
Date: Thu, 27 Aug 2020 17:15:47 +0800
Subject: [PATCH 0801/1341] net: dsa: mt7530: fix advertising unsupported
 1000baseT_Half

Remove 1000baseT_Half to advertise correct hardware capability in
phylink_validate() callback function.

Fixes: 38f790a80560 ("net: dsa: mt7530: Add support for port 5")
Signed-off-by: Landen Chao <landen.chao@mediatek.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/dsa/mt7530.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 4b4701c69fe18..e044d9e8d0165 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1504,7 +1504,7 @@ static void mt7530_phylink_validate(struct dsa_switch *ds, int port,
 		phylink_set(mask, 100baseT_Full);
 
 		if (state->interface != PHY_INTERFACE_MODE_MII) {
-			phylink_set(mask, 1000baseT_Half);
+			/* This switch only supports 1G full-duplex. */
 			phylink_set(mask, 1000baseT_Full);
 			if (port == 5)
 				phylink_set(mask, 1000baseX_Full);
-- 
GitLab


From 5438dd45831ee33869779bd1919b05816ae4dbc9 Mon Sep 17 00:00:00 2001
From: Cong Wang <xiyou.wangcong@gmail.com>
Date: Thu, 27 Aug 2020 10:40:41 -0700
Subject: [PATCH 0802/1341] net_sched: fix error path in red_init()

When ->init() fails, ->destroy() is called to clean up.
So it is unnecessary to clean up in red_init(), and it
would cause some refcount underflow.

Fixes: aee9caa03fc3 ("net: sched: sch_red: Add qevents "early_drop" and "mark"")
Reported-and-tested-by: syzbot+b33c1cb0a30ebdc8a5f9@syzkaller.appspotmail.com
Reported-and-tested-by: syzbot+e5ea5f8a3ecfd4427a1c@syzkaller.appspotmail.com
Cc: Petr Machata <petrm@mellanox.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/sched/sch_red.c | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index deac82f3ad7b8..e89fab6ccb34f 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -353,23 +353,11 @@ static int red_init(struct Qdisc *sch, struct nlattr *opt,
 			      FLOW_BLOCK_BINDER_TYPE_RED_EARLY_DROP,
 			      tb[TCA_RED_EARLY_DROP_BLOCK], extack);
 	if (err)
-		goto err_early_drop_init;
-
-	err = tcf_qevent_init(&q->qe_mark, sch,
-			      FLOW_BLOCK_BINDER_TYPE_RED_MARK,
-			      tb[TCA_RED_MARK_BLOCK], extack);
-	if (err)
-		goto err_mark_init;
-
-	return 0;
+		return err;
 
-err_mark_init:
-	tcf_qevent_destroy(&q->qe_early_drop, sch);
-err_early_drop_init:
-	del_timer_sync(&q->adapt_timer);
-	red_offload(sch, false);
-	qdisc_put(q->qdisc);
-	return err;
+	return tcf_qevent_init(&q->qe_mark, sch,
+			       FLOW_BLOCK_BINDER_TYPE_RED_MARK,
+			       tb[TCA_RED_MARK_BLOCK], extack);
 }
 
 static int red_change(struct Qdisc *sch, struct nlattr *opt,
-- 
GitLab


From e9ee186bb735bfc17fa81dbc9aebf268aee5b41e Mon Sep 17 00:00:00 2001
From: James Morse <james.morse@arm.com>
Date: Fri, 21 Aug 2020 15:07:05 +0100
Subject: [PATCH 0803/1341] KVM: arm64: Add kvm_extable for vaxorcism code

KVM has a one instruction window where it will allow an SError exception
to be consumed by the hypervisor without treating it as a hypervisor bug.
This is used to consume asynchronous external abort that were caused by
the guest.

As we are about to add another location that survives unexpected exceptions,
generalise this code to make it behave like the host's extable.

KVM's version has to be mapped to EL2 to be accessible on nVHE systems.

The SError vaxorcism code is a one instruction window, so has two entries
in the extable. Because the KVM code is copied for VHE and nVHE, we end up
with four entries, half of which correspond with code that isn't mapped.

Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/include/asm/kvm_asm.h        | 15 ++++++++
 arch/arm64/kernel/image-vars.h          |  4 ++
 arch/arm64/kernel/vmlinux.lds.S         |  8 ++++
 arch/arm64/kvm/hyp/entry.S              | 15 +++++---
 arch/arm64/kvm/hyp/hyp-entry.S          | 51 +++++++++++++++----------
 arch/arm64/kvm/hyp/include/hyp/switch.h | 31 +++++++++++++++
 arch/arm64/kvm/hyp/nvhe/switch.c        |  5 +++
 arch/arm64/kvm/hyp/vhe/switch.c         |  5 +++
 8 files changed, 108 insertions(+), 26 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
index fb1a922b31ba2..63350f0e34538 100644
--- a/arch/arm64/include/asm/kvm_asm.h
+++ b/arch/arm64/include/asm/kvm_asm.h
@@ -193,6 +193,21 @@ extern char __smccc_workaround_1_smc[__SMCCC_WORKAROUND_1_SMC_SZ];
 	ldr	\vcpu, [\ctxt, #HOST_CONTEXT_VCPU]
 .endm
 
+/*
+ * KVM extable for unexpected exceptions.
+ * In the same format _asm_extable, but output to a different section so that
+ * it can be mapped to EL2. The KVM version is not sorted. The caller must
+ * ensure:
+ * x18 has the hypervisor value to allow any Shadow-Call-Stack instrumented
+ * code to write to it, and that SPSR_EL2 and ELR_EL2 are restored by the fixup.
+ */
+.macro	_kvm_extable, from, to
+	.pushsection	__kvm_ex_table, "a"
+	.align		3
+	.long		(\from - .), (\to - .)
+	.popsection
+.endm
+
 #endif
 
 #endif /* __ARM_KVM_ASM_H__ */
diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h
index 9e897c500237d..8982b68289b79 100644
--- a/arch/arm64/kernel/image-vars.h
+++ b/arch/arm64/kernel/image-vars.h
@@ -103,6 +103,10 @@ KVM_NVHE_ALIAS(vgic_v3_cpuif_trap);
 KVM_NVHE_ALIAS(gic_pmr_sync);
 #endif
 
+/* EL2 exception handling */
+KVM_NVHE_ALIAS(__start___kvm_ex_table);
+KVM_NVHE_ALIAS(__stop___kvm_ex_table);
+
 #endif /* CONFIG_KVM */
 
 #endif /* __ARM64_KERNEL_IMAGE_VARS_H */
diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S
index ec8e894684a78..7cba7623fcec7 100644
--- a/arch/arm64/kernel/vmlinux.lds.S
+++ b/arch/arm64/kernel/vmlinux.lds.S
@@ -20,6 +20,13 @@ ENTRY(_text)
 
 jiffies = jiffies_64;
 
+
+#define HYPERVISOR_EXTABLE					\
+	. = ALIGN(SZ_8);					\
+	__start___kvm_ex_table = .;				\
+	*(__kvm_ex_table)					\
+	__stop___kvm_ex_table = .;
+
 #define HYPERVISOR_TEXT					\
 	/*						\
 	 * Align to 4 KB so that			\
@@ -35,6 +42,7 @@ jiffies = jiffies_64;
 	__hyp_idmap_text_end = .;			\
 	__hyp_text_start = .;				\
 	*(.hyp.text)					\
+	HYPERVISOR_EXTABLE				\
 	__hyp_text_end = .;
 
 #define IDMAP_TEXT					\
diff --git a/arch/arm64/kvm/hyp/entry.S b/arch/arm64/kvm/hyp/entry.S
index ee32a77433898..76e7eaf4675eb 100644
--- a/arch/arm64/kvm/hyp/entry.S
+++ b/arch/arm64/kvm/hyp/entry.S
@@ -196,20 +196,23 @@ alternative_endif
 	// This is our single instruction exception window. A pending
 	// SError is guaranteed to occur at the earliest when we unmask
 	// it, and at the latest just after the ISB.
-	.global	abort_guest_exit_start
 abort_guest_exit_start:
 
 	isb
 
-	.global	abort_guest_exit_end
 abort_guest_exit_end:
 
 	msr	daifset, #4	// Mask aborts
+	ret
+
+	_kvm_extable	abort_guest_exit_start, 9997f
+	_kvm_extable	abort_guest_exit_end, 9997f
+9997:
+	msr	daifset, #4	// Mask aborts
+	mov	x0, #(1 << ARM_EXIT_WITH_SERROR_BIT)
 
-	// If the exception took place, restore the EL1 exception
-	// context so that we can report some information.
-	// Merge the exception code with the SError pending bit.
-	tbz	x0, #ARM_EXIT_WITH_SERROR_BIT, 1f
+	// restore the EL1 exception context so that we can report some
+	// information. Merge the exception code with the SError pending bit.
 	msr	elr_el2, x2
 	msr	esr_el2, x3
 	msr	spsr_el2, x4
diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S
index 689fccbc9de72..e47547e276d8d 100644
--- a/arch/arm64/kvm/hyp/hyp-entry.S
+++ b/arch/arm64/kvm/hyp/hyp-entry.S
@@ -15,6 +15,30 @@
 #include <asm/kvm_mmu.h>
 #include <asm/mmu.h>
 
+.macro save_caller_saved_regs_vect
+	/* x0 and x1 were saved in the vector entry */
+	stp	x2, x3,   [sp, #-16]!
+	stp	x4, x5,   [sp, #-16]!
+	stp	x6, x7,   [sp, #-16]!
+	stp	x8, x9,   [sp, #-16]!
+	stp	x10, x11, [sp, #-16]!
+	stp	x12, x13, [sp, #-16]!
+	stp	x14, x15, [sp, #-16]!
+	stp	x16, x17, [sp, #-16]!
+.endm
+
+.macro restore_caller_saved_regs_vect
+	ldp	x16, x17, [sp], #16
+	ldp	x14, x15, [sp], #16
+	ldp	x12, x13, [sp], #16
+	ldp	x10, x11, [sp], #16
+	ldp	x8, x9,   [sp], #16
+	ldp	x6, x7,   [sp], #16
+	ldp	x4, x5,   [sp], #16
+	ldp	x2, x3,   [sp], #16
+	ldp	x0, x1,   [sp], #16
+.endm
+
 	.text
 
 .macro do_el2_call
@@ -157,27 +181,14 @@ el2_sync:
 
 
 el2_error:
-	ldp	x0, x1, [sp], #16
+	save_caller_saved_regs_vect
+	stp     x29, x30, [sp, #-16]!
+
+	bl	kvm_unexpected_el2_exception
+
+	ldp     x29, x30, [sp], #16
+	restore_caller_saved_regs_vect
 
-	/*
-	 * Only two possibilities:
-	 * 1) Either we come from the exit path, having just unmasked
-	 *    PSTATE.A: change the return code to an EL2 fault, and
-	 *    carry on, as we're already in a sane state to handle it.
-	 * 2) Or we come from anywhere else, and that's a bug: we panic.
-	 *
-	 * For (1), x0 contains the original return code and x1 doesn't
-	 * contain anything meaningful at that stage. We can reuse them
-	 * as temp registers.
-	 * For (2), who cares?
-	 */
-	mrs	x0, elr_el2
-	adr	x1, abort_guest_exit_start
-	cmp	x0, x1
-	adr	x1, abort_guest_exit_end
-	ccmp	x0, x1, #4, ne
-	b.ne	__hyp_panic
-	mov	x0, #(1 << ARM_EXIT_WITH_SERROR_BIT)
 	eret
 	sb
 
diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h
index 426ef65601dd9..6d8d4ed4287c0 100644
--- a/arch/arm64/kvm/hyp/include/hyp/switch.h
+++ b/arch/arm64/kvm/hyp/include/hyp/switch.h
@@ -17,6 +17,7 @@
 
 #include <asm/barrier.h>
 #include <asm/cpufeature.h>
+#include <asm/extable.h>
 #include <asm/kprobes.h>
 #include <asm/kvm_asm.h>
 #include <asm/kvm_emulate.h>
@@ -29,6 +30,9 @@
 
 extern const char __hyp_panic_string[];
 
+extern struct exception_table_entry __start___kvm_ex_table;
+extern struct exception_table_entry __stop___kvm_ex_table;
+
 /* Check whether the FP regs were dirtied while in the host-side run loop: */
 static inline bool update_fp_enabled(struct kvm_vcpu *vcpu)
 {
@@ -508,4 +512,31 @@ static inline void __set_host_arch_workaround_state(struct kvm_vcpu *vcpu)
 #endif
 }
 
+static inline void __kvm_unexpected_el2_exception(void)
+{
+	unsigned long addr, fixup;
+	struct kvm_cpu_context *host_ctxt;
+	struct exception_table_entry *entry, *end;
+	unsigned long elr_el2 = read_sysreg(elr_el2);
+
+	entry = hyp_symbol_addr(__start___kvm_ex_table);
+	end = hyp_symbol_addr(__stop___kvm_ex_table);
+	host_ctxt = &__hyp_this_cpu_ptr(kvm_host_data)->host_ctxt;
+
+	while (entry < end) {
+		addr = (unsigned long)&entry->insn + entry->insn;
+		fixup = (unsigned long)&entry->fixup + entry->fixup;
+
+		if (addr != elr_el2) {
+			entry++;
+			continue;
+		}
+
+		write_sysreg(fixup, elr_el2);
+		return;
+	}
+
+	hyp_panic(host_ctxt);
+}
+
 #endif /* __ARM64_KVM_HYP_SWITCH_H__ */
diff --git a/arch/arm64/kvm/hyp/nvhe/switch.c b/arch/arm64/kvm/hyp/nvhe/switch.c
index 341be2f2f3126..0970442d2dbcf 100644
--- a/arch/arm64/kvm/hyp/nvhe/switch.c
+++ b/arch/arm64/kvm/hyp/nvhe/switch.c
@@ -270,3 +270,8 @@ void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt)
 		       read_sysreg(hpfar_el2), par, vcpu);
 	unreachable();
 }
+
+asmlinkage void kvm_unexpected_el2_exception(void)
+{
+	return __kvm_unexpected_el2_exception();
+}
diff --git a/arch/arm64/kvm/hyp/vhe/switch.c b/arch/arm64/kvm/hyp/vhe/switch.c
index c52d714e0d759..c1da4f86ccaca 100644
--- a/arch/arm64/kvm/hyp/vhe/switch.c
+++ b/arch/arm64/kvm/hyp/vhe/switch.c
@@ -217,3 +217,8 @@ void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt)
 	__hyp_call_panic(spsr, elr, par, host_ctxt);
 	unreachable();
 }
+
+asmlinkage void kvm_unexpected_el2_exception(void)
+{
+	return __kvm_unexpected_el2_exception();
+}
-- 
GitLab


From 88a84ccccb3966bcc3f309cdb76092a9892c0260 Mon Sep 17 00:00:00 2001
From: James Morse <james.morse@arm.com>
Date: Fri, 21 Aug 2020 15:07:06 +0100
Subject: [PATCH 0804/1341] KVM: arm64: Survive synchronous exceptions caused
 by AT instructions

KVM doesn't expect any synchronous exceptions when executing, any such
exception leads to a panic(). AT instructions access the guest page
tables, and can cause a synchronous external abort to be taken.

The arm-arm is unclear on what should happen if the guest has configured
the hardware update of the access-flag, and a memory type in TCR_EL1 that
does not support atomic operations. B2.2.6 "Possible implementation
restrictions on using atomic instructions" from DDI0487F.a lists
synchronous external abort as a possible behaviour of atomic instructions
that target memory that isn't writeback cacheable, but the page table
walker may behave differently.

Make KVM robust to synchronous exceptions caused by AT instructions.
Add a get_user() style helper for AT instructions that returns -EFAULT
if an exception was generated.

While KVM's version of the exception table mixes synchronous and
asynchronous exceptions, only one of these can occur at each location.

Re-enter the guest when the AT instructions take an exception on the
assumption the guest will take the same exception. This isn't guaranteed
to make forward progress, as the AT instructions may always walk the page
tables, but guest execution may use the translation cached in the TLB.

This isn't a problem, as since commit 5dcd0fdbb492 ("KVM: arm64: Defer guest
entry when an asynchronous exception is pending"), KVM will return to the
host to process IRQs allowing the rest of the system to keep running.

Cc: stable@vger.kernel.org # <v5.3: 5dcd0fdbb492 ("KVM: arm64: Defer guest entry when an asynchronous exception is pending")
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/include/asm/kvm_asm.h        | 28 +++++++++++++++++++++++++
 arch/arm64/kvm/hyp/hyp-entry.S          | 14 +++++++++----
 arch/arm64/kvm/hyp/include/hyp/switch.h |  8 +++----
 3 files changed, 42 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
index 63350f0e34538..6f98fbd0ac816 100644
--- a/arch/arm64/include/asm/kvm_asm.h
+++ b/arch/arm64/include/asm/kvm_asm.h
@@ -169,6 +169,34 @@ extern char __smccc_workaround_1_smc[__SMCCC_WORKAROUND_1_SMC_SZ];
 		*__hyp_this_cpu_ptr(sym);				\
 	 })
 
+#define __KVM_EXTABLE(from, to)						\
+	"	.pushsection	__kvm_ex_table, \"a\"\n"		\
+	"	.align		3\n"					\
+	"	.long		(" #from " - .), (" #to " - .)\n"	\
+	"	.popsection\n"
+
+
+#define __kvm_at(at_op, addr)						\
+( { 									\
+	int __kvm_at_err = 0;						\
+	u64 spsr, elr;							\
+	asm volatile(							\
+	"	mrs	%1, spsr_el2\n"					\
+	"	mrs	%2, elr_el2\n"					\
+	"1:	at	"at_op", %3\n"					\
+	"	isb\n"							\
+	"	b	9f\n"						\
+	"2:	msr	spsr_el2, %1\n"					\
+	"	msr	elr_el2, %2\n"					\
+	"	mov	%w0, %4\n"					\
+	"9:\n"								\
+	__KVM_EXTABLE(1b, 2b)						\
+	: "+r" (__kvm_at_err), "=&r" (spsr), "=&r" (elr)		\
+	: "r" (addr), "i" (-EFAULT));					\
+	__kvm_at_err;							\
+} )
+
+
 #else /* __ASSEMBLY__ */
 
 .macro hyp_adr_this_cpu reg, sym, tmp
diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S
index e47547e276d8d..46b4dab933d0e 100644
--- a/arch/arm64/kvm/hyp/hyp-entry.S
+++ b/arch/arm64/kvm/hyp/hyp-entry.S
@@ -167,13 +167,19 @@ el1_error:
 	b	__guest_exit
 
 el2_sync:
-	/* Check for illegal exception return, otherwise panic */
+	/* Check for illegal exception return */
 	mrs	x0, spsr_el2
+	tbnz	x0, #20, 1f
 
-	/* if this was something else, then panic! */
-	tst	x0, #PSR_IL_BIT
-	b.eq	__hyp_panic
+	save_caller_saved_regs_vect
+	stp     x29, x30, [sp, #-16]!
+	bl	kvm_unexpected_el2_exception
+	ldp     x29, x30, [sp], #16
+	restore_caller_saved_regs_vect
+
+	eret
 
+1:
 	/* Let's attempt a recovery from the illegal exception return */
 	get_vcpu_ptr	x1, x0
 	mov	x0, #ARM_EXCEPTION_IL
diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h
index 6d8d4ed4287c0..5b6b8fa00f0af 100644
--- a/arch/arm64/kvm/hyp/include/hyp/switch.h
+++ b/arch/arm64/kvm/hyp/include/hyp/switch.h
@@ -146,10 +146,10 @@ static inline bool __translate_far_to_hpfar(u64 far, u64 *hpfar)
 	 * saved the guest context yet, and we may return early...
 	 */
 	par = read_sysreg(par_el1);
-	asm volatile("at s1e1r, %0" : : "r" (far));
-	isb();
-
-	tmp = read_sysreg(par_el1);
+	if (!__kvm_at("s1e1r", far))
+		tmp = read_sysreg(par_el1);
+	else
+		tmp = SYS_PAR_EL1_F; /* back to the guest */
 	write_sysreg(par, par_el1);
 
 	if (unlikely(tmp & SYS_PAR_EL1_F))
-- 
GitLab


From 71a7f8cb1ca4ca7214a700b1243626759b6c11d4 Mon Sep 17 00:00:00 2001
From: James Morse <james.morse@arm.com>
Date: Fri, 21 Aug 2020 15:07:07 +0100
Subject: [PATCH 0805/1341] KVM: arm64: Set HCR_EL2.PTW to prevent AT taking
 synchronous exception

AT instructions do a translation table walk and return the result, or
the fault in PAR_EL1. KVM uses these to find the IPA when the value is
not provided by the CPU in HPFAR_EL1.

If a translation table walk causes an external abort it is taken as an
exception, even if it was due to an AT instruction. (DDI0487F.a's D5.2.11
"Synchronous faults generated by address translation instructions")

While we previously made KVM resilient to exceptions taken due to AT
instructions, the device access causes mismatched attributes, and may
occur speculatively. Prevent this, by forbidding a walk through memory
described as device at stage2. Now such AT instructions will report a
stage2 fault.

Such a fault will cause KVM to restart the guest. If the AT instructions
always walk the page tables, but guest execution uses the translation cached
in the TLB, the guest can't make forward progress until the TLB entry is
evicted. This isn't a problem, as since commit 5dcd0fdbb492 ("KVM: arm64:
Defer guest entry when an asynchronous exception is pending"), KVM will
return to the host to process IRQs allowing the rest of the system to keep
running.

Cc: stable@vger.kernel.org # <v5.3: 5dcd0fdbb492 ("KVM: arm64: Defer guest entry when an asynchronous exception is pending")
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/include/asm/kvm_arm.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
index 51c1d99189992..1da8e3dc44555 100644
--- a/arch/arm64/include/asm/kvm_arm.h
+++ b/arch/arm64/include/asm/kvm_arm.h
@@ -71,11 +71,12 @@
  * IMO:		Override CPSR.I and enable signaling with VI
  * FMO:		Override CPSR.F and enable signaling with VF
  * SWIO:	Turn set/way invalidates into set/way clean+invalidate
+ * PTW:		Take a stage2 fault if a stage1 walk steps in device memory
  */
 #define HCR_GUEST_FLAGS (HCR_TSC | HCR_TSW | HCR_TWE | HCR_TWI | HCR_VM | \
 			 HCR_BSU_IS | HCR_FB | HCR_TAC | \
 			 HCR_AMO | HCR_SWIO | HCR_TIDCP | HCR_RW | HCR_TLOR | \
-			 HCR_FMO | HCR_IMO)
+			 HCR_FMO | HCR_IMO | HCR_PTW )
 #define HCR_VIRT_EXCP_MASK (HCR_VSE | HCR_VI | HCR_VF)
 #define HCR_HOST_NVHE_FLAGS (HCR_RW | HCR_API | HCR_APK)
 #define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H)
-- 
GitLab


From e183785f2529b4135f00a0330a3b08e7c86530c8 Mon Sep 17 00:00:00 2001
From: Paulo Alcantara <pc@cjr.nz>
Date: Thu, 27 Aug 2020 11:20:19 -0300
Subject: [PATCH 0806/1341] cifs: fix check of tcon dfs in smb1

For SMB1, the DFS flag should be checked against tcon->Flags rather
than tcon->share_flags.  While at it, add an is_tcon_dfs() helper to
check for DFS capability in a more generic way.

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Shyam Prasad N <nspmangalore@gmail.com>
---
 fs/cifs/cifsglob.h | 15 +++++++++++++++
 fs/cifs/connect.c  |  2 +-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index b296964b8afa6..b565d83ba89ed 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -2031,4 +2031,19 @@ static inline bool is_smb1_server(struct TCP_Server_Info *server)
 	return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0;
 }
 
+static inline bool is_tcon_dfs(struct cifs_tcon *tcon)
+{
+	/*
+	 * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS
+	 * Subsystem Notifies That a Share Is a DFS Share.
+	 *
+	 * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server
+	 * Application Updates a Share.
+	 */
+	if (!tcon || !tcon->ses || !tcon->ses->server)
+		return false;
+	return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS :
+		tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT);
+}
+
 #endif	/* _CIFS_GLOB_H */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index a275ee399dcea..392c44d64d8a6 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -4909,7 +4909,7 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol)
 		if (!tcon)
 			continue;
 		/* Make sure that requests go through new root servers */
-		if (tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT)) {
+		if (is_tcon_dfs(tcon)) {
 			put_root_ses(root_ses);
 			set_root_ses(cifs_sb, ses, &root_ses);
 		}
-- 
GitLab


From 9c4b205a20f483d8a5d1208cfec33e339347d4bd Mon Sep 17 00:00:00 2001
From: Jerome Brunet <jbrunet@baylibre.com>
Date: Fri, 28 Aug 2020 17:14:38 +0200
Subject: [PATCH 0807/1341] ASoC: meson: axg-toddr: fix channel order on g12
 platforms

On g12 and following platforms, The first channel of record with more than
2 channels ends being placed randomly on an even channel of the output.

On these SoCs, a bit was added to force the first channel to be placed at
the beginning of the output. Apparently the behavior if the bit is not set
is not easily predictable. According to the documentation, this bit is not
present on the axg series.

Set the bit on g12 and fix the problem.

Fixes: a3c23a8ad4dc ("ASoC: meson: axg-toddr: add g12a support")
Reported-by: Nicolas Belin <nbelin@baylibre.com>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20200828151438.350974-1-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/meson/axg-toddr.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

diff --git a/sound/soc/meson/axg-toddr.c b/sound/soc/meson/axg-toddr.c
index e711abcf8c124..d6adf7edea41f 100644
--- a/sound/soc/meson/axg-toddr.c
+++ b/sound/soc/meson/axg-toddr.c
@@ -18,6 +18,7 @@
 #define CTRL0_TODDR_SEL_RESAMPLE	BIT(30)
 #define CTRL0_TODDR_EXT_SIGNED		BIT(29)
 #define CTRL0_TODDR_PP_MODE		BIT(28)
+#define CTRL0_TODDR_SYNC_CH		BIT(27)
 #define CTRL0_TODDR_TYPE_MASK		GENMASK(15, 13)
 #define CTRL0_TODDR_TYPE(x)		((x) << 13)
 #define CTRL0_TODDR_MSB_POS_MASK	GENMASK(12, 8)
@@ -189,10 +190,31 @@ static const struct axg_fifo_match_data axg_toddr_match_data = {
 	.dai_drv		= &axg_toddr_dai_drv
 };
 
+static int g12a_toddr_dai_startup(struct snd_pcm_substream *substream,
+				 struct snd_soc_dai *dai)
+{
+	struct axg_fifo *fifo = snd_soc_dai_get_drvdata(dai);
+	int ret;
+
+	ret = axg_toddr_dai_startup(substream, dai);
+	if (ret)
+		return ret;
+
+	/*
+	 * Make sure the first channel ends up in the at beginning of the output
+	 * As weird as it looks, without this the first channel may be misplaced
+	 * in memory, with a random shift of 2 channels.
+	 */
+	regmap_update_bits(fifo->map, FIFO_CTRL0, CTRL0_TODDR_SYNC_CH,
+			   CTRL0_TODDR_SYNC_CH);
+
+	return 0;
+}
+
 static const struct snd_soc_dai_ops g12a_toddr_ops = {
 	.prepare	= g12a_toddr_dai_prepare,
 	.hw_params	= axg_toddr_dai_hw_params,
-	.startup	= axg_toddr_dai_startup,
+	.startup	= g12a_toddr_dai_startup,
 	.shutdown	= axg_toddr_dai_shutdown,
 };
 
-- 
GitLab


From 4b7ddc58e61ada82be1f47f82d5139f0ab2ba478 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Sat, 22 Aug 2020 18:07:27 -0700
Subject: [PATCH 0808/1341] netfilter: delete repeated words

Drop duplicated words in net/netfilter/ and net/ipv4/netfilter/.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/ipv4/netfilter/nf_nat_pptp.c       | 2 +-
 net/netfilter/nf_conntrack_pptp.c      | 2 +-
 net/netfilter/nf_conntrack_proto_tcp.c | 2 +-
 net/netfilter/xt_recent.c              | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/net/ipv4/netfilter/nf_nat_pptp.c b/net/ipv4/netfilter/nf_nat_pptp.c
index 7afde8828b4c9..3f248a19faa30 100644
--- a/net/ipv4/netfilter/nf_nat_pptp.c
+++ b/net/ipv4/netfilter/nf_nat_pptp.c
@@ -3,7 +3,7 @@
  * nf_nat_pptp.c
  *
  * NAT support for PPTP (Point to Point Tunneling Protocol).
- * PPTP is a a protocol for creating virtual private networks.
+ * PPTP is a protocol for creating virtual private networks.
  * It is a specification defined by Microsoft and some vendors
  * working with Microsoft.  PPTP is built on top of a modified
  * version of the Internet Generic Routing Encapsulation Protocol.
diff --git a/net/netfilter/nf_conntrack_pptp.c b/net/netfilter/nf_conntrack_pptp.c
index 1f44d523b5121..5105d4250012c 100644
--- a/net/netfilter/nf_conntrack_pptp.c
+++ b/net/netfilter/nf_conntrack_pptp.c
@@ -1,7 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Connection tracking support for PPTP (Point to Point Tunneling Protocol).
- * PPTP is a a protocol for creating virtual private networks.
+ * PPTP is a protocol for creating virtual private networks.
  * It is a specification defined by Microsoft and some vendors
  * working with Microsoft.  PPTP is built on top of a modified
  * version of the Internet Generic Routing Encapsulation Protocol.
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c
index 6892e497781c1..e8c86ee4c1c48 100644
--- a/net/netfilter/nf_conntrack_proto_tcp.c
+++ b/net/netfilter/nf_conntrack_proto_tcp.c
@@ -1152,7 +1152,7 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct,
 		   && (old_state == TCP_CONNTRACK_SYN_RECV
 		       || old_state == TCP_CONNTRACK_ESTABLISHED)
 		   && new_state == TCP_CONNTRACK_ESTABLISHED) {
-		/* Set ASSURED if we see see valid ack in ESTABLISHED
+		/* Set ASSURED if we see valid ack in ESTABLISHED
 		   after SYN_RECV or a valid answer for a picked up
 		   connection. */
 		set_bit(IPS_ASSURED_BIT, &ct->status);
diff --git a/net/netfilter/xt_recent.c b/net/netfilter/xt_recent.c
index 19bef176145eb..606411869698e 100644
--- a/net/netfilter/xt_recent.c
+++ b/net/netfilter/xt_recent.c
@@ -640,7 +640,7 @@ static void __net_exit recent_proc_net_exit(struct net *net)
 	struct recent_table *t;
 
 	/* recent_net_exit() is called before recent_mt_destroy(). Make sure
-	 * that the parent xt_recent proc entry is is empty before trying to
+	 * that the parent xt_recent proc entry is empty before trying to
 	 * remove it.
 	 */
 	spin_lock_bh(&recent_lock);
-- 
GitLab


From ee921183557af39c1a0475f982d43b0fcac25e2e Mon Sep 17 00:00:00 2001
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: Sun, 23 Aug 2020 13:55:36 +0200
Subject: [PATCH 0809/1341] netfilter: nfnetlink: nfnetlink_unicast() reports
 EAGAIN instead of ENOBUFS

Frontend callback reports EAGAIN to nfnetlink to retry a command, this
is used to signal that module autoloading is required. Unfortunately,
nlmsg_unicast() reports EAGAIN in case the receiver socket buffer gets
full, so it enters a busy-loop.

This patch updates nfnetlink_unicast() to turn EAGAIN into ENOBUFS and
to use nlmsg_unicast(). Remove the flags field in nfnetlink_unicast()
since this is always MSG_DONTWAIT in the existing code which is exactly
what nlmsg_unicast() passes to netlink_unicast() as parameter.

Fixes: 96518518cc41 ("netfilter: add nftables")
Reported-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 include/linux/netfilter/nfnetlink.h |  3 +-
 net/netfilter/nf_tables_api.c       | 61 ++++++++++++++---------------
 net/netfilter/nfnetlink.c           | 11 ++++--
 net/netfilter/nfnetlink_log.c       |  3 +-
 net/netfilter/nfnetlink_queue.c     |  2 +-
 5 files changed, 40 insertions(+), 40 deletions(-)

diff --git a/include/linux/netfilter/nfnetlink.h b/include/linux/netfilter/nfnetlink.h
index 851425c3178f1..89016d08f6a27 100644
--- a/include/linux/netfilter/nfnetlink.h
+++ b/include/linux/netfilter/nfnetlink.h
@@ -43,8 +43,7 @@ int nfnetlink_has_listeners(struct net *net, unsigned int group);
 int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 portid,
 		   unsigned int group, int echo, gfp_t flags);
 int nfnetlink_set_err(struct net *net, u32 portid, u32 group, int error);
-int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid,
-		      int flags);
+int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid);
 
 static inline u16 nfnl_msg_type(u8 subsys, u8 msg_type)
 {
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c
index 71e501c5ad217..b7dc1cbf40ea4 100644
--- a/net/netfilter/nf_tables_api.c
+++ b/net/netfilter/nf_tables_api.c
@@ -815,11 +815,11 @@ static int nf_tables_gettable(struct net *net, struct sock *nlsk,
 					nlh->nlmsg_seq, NFT_MSG_NEWTABLE, 0,
 					family, table);
 	if (err < 0)
-		goto err;
+		goto err_fill_table_info;
 
-	return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
+	return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
 
-err:
+err_fill_table_info:
 	kfree_skb(skb2);
 	return err;
 }
@@ -1563,11 +1563,11 @@ static int nf_tables_getchain(struct net *net, struct sock *nlsk,
 					nlh->nlmsg_seq, NFT_MSG_NEWCHAIN, 0,
 					family, table, chain);
 	if (err < 0)
-		goto err;
+		goto err_fill_chain_info;
 
-	return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
+	return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
 
-err:
+err_fill_chain_info:
 	kfree_skb(skb2);
 	return err;
 }
@@ -3008,11 +3008,11 @@ static int nf_tables_getrule(struct net *net, struct sock *nlsk,
 				       nlh->nlmsg_seq, NFT_MSG_NEWRULE, 0,
 				       family, table, chain, rule, NULL);
 	if (err < 0)
-		goto err;
+		goto err_fill_rule_info;
 
-	return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
+	return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
 
-err:
+err_fill_rule_info:
 	kfree_skb(skb2);
 	return err;
 }
@@ -3968,11 +3968,11 @@ static int nf_tables_getset(struct net *net, struct sock *nlsk,
 
 	err = nf_tables_fill_set(skb2, &ctx, set, NFT_MSG_NEWSET, 0);
 	if (err < 0)
-		goto err;
+		goto err_fill_set_info;
 
-	return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
+	return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
 
-err:
+err_fill_set_info:
 	kfree_skb(skb2);
 	return err;
 }
@@ -4860,24 +4860,18 @@ static int nft_get_set_elem(struct nft_ctx *ctx, struct nft_set *set,
 	err = -ENOMEM;
 	skb = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
 	if (skb == NULL)
-		goto err1;
+		return err;
 
 	err = nf_tables_fill_setelem_info(skb, ctx, ctx->seq, ctx->portid,
 					  NFT_MSG_NEWSETELEM, 0, set, &elem);
 	if (err < 0)
-		goto err2;
+		goto err_fill_setelem;
 
-	err = nfnetlink_unicast(skb, ctx->net, ctx->portid, MSG_DONTWAIT);
-	/* This avoids a loop in nfnetlink. */
-	if (err < 0)
-		goto err1;
+	return nfnetlink_unicast(skb, ctx->net, ctx->portid);
 
-	return 0;
-err2:
+err_fill_setelem:
 	kfree_skb(skb);
-err1:
-	/* this avoids a loop in nfnetlink. */
-	return err == -EAGAIN ? -ENOBUFS : err;
+	return err;
 }
 
 /* called with rcu_read_lock held */
@@ -6182,10 +6176,11 @@ static int nf_tables_getobj(struct net *net, struct sock *nlsk,
 				      nlh->nlmsg_seq, NFT_MSG_NEWOBJ, 0,
 				      family, table, obj, reset);
 	if (err < 0)
-		goto err;
+		goto err_fill_obj_info;
 
-	return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
-err:
+	return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
+
+err_fill_obj_info:
 	kfree_skb(skb2);
 	return err;
 }
@@ -7045,10 +7040,11 @@ static int nf_tables_getflowtable(struct net *net, struct sock *nlsk,
 					    NFT_MSG_NEWFLOWTABLE, 0, family,
 					    flowtable, &flowtable->hook_list);
 	if (err < 0)
-		goto err;
+		goto err_fill_flowtable_info;
 
-	return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
-err:
+	return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
+
+err_fill_flowtable_info:
 	kfree_skb(skb2);
 	return err;
 }
@@ -7234,10 +7230,11 @@ static int nf_tables_getgen(struct net *net, struct sock *nlsk,
 	err = nf_tables_fill_gen_info(skb2, net, NETLINK_CB(skb).portid,
 				      nlh->nlmsg_seq);
 	if (err < 0)
-		goto err;
+		goto err_fill_gen_info;
 
-	return nlmsg_unicast(nlsk, skb2, NETLINK_CB(skb).portid);
-err:
+	return nfnetlink_unicast(skb2, net, NETLINK_CB(skb).portid);
+
+err_fill_gen_info:
 	kfree_skb(skb2);
 	return err;
 }
diff --git a/net/netfilter/nfnetlink.c b/net/netfilter/nfnetlink.c
index 5f24edf958309..3a2e64e13b227 100644
--- a/net/netfilter/nfnetlink.c
+++ b/net/netfilter/nfnetlink.c
@@ -149,10 +149,15 @@ int nfnetlink_set_err(struct net *net, u32 portid, u32 group, int error)
 }
 EXPORT_SYMBOL_GPL(nfnetlink_set_err);
 
-int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid,
-		      int flags)
+int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid)
 {
-	return netlink_unicast(net->nfnl, skb, portid, flags);
+	int err;
+
+	err = nlmsg_unicast(net->nfnl, skb, portid);
+	if (err == -EAGAIN)
+		err = -ENOBUFS;
+
+	return err;
 }
 EXPORT_SYMBOL_GPL(nfnetlink_unicast);
 
diff --git a/net/netfilter/nfnetlink_log.c b/net/netfilter/nfnetlink_log.c
index f029924198503..b35e8d9a5b37e 100644
--- a/net/netfilter/nfnetlink_log.c
+++ b/net/netfilter/nfnetlink_log.c
@@ -356,8 +356,7 @@ __nfulnl_send(struct nfulnl_instance *inst)
 			goto out;
 		}
 	}
-	nfnetlink_unicast(inst->skb, inst->net, inst->peer_portid,
-			  MSG_DONTWAIT);
+	nfnetlink_unicast(inst->skb, inst->net, inst->peer_portid);
 out:
 	inst->qlen = 0;
 	inst->skb = NULL;
diff --git a/net/netfilter/nfnetlink_queue.c b/net/netfilter/nfnetlink_queue.c
index dadfc06245a36..d1d8bca03b4f0 100644
--- a/net/netfilter/nfnetlink_queue.c
+++ b/net/netfilter/nfnetlink_queue.c
@@ -681,7 +681,7 @@ __nfqnl_enqueue_packet(struct net *net, struct nfqnl_instance *queue,
 	*packet_id_ptr = htonl(entry->id);
 
 	/* nfnetlink_unicast will either free the nskb or add it to a socket */
-	err = nfnetlink_unicast(nskb, net, queue->peer_portid, MSG_DONTWAIT);
+	err = nfnetlink_unicast(nskb, net, queue->peer_portid);
 	if (err < 0) {
 		if (queue->flags & NFQA_CFG_F_FAIL_OPEN) {
 			failopen = 1;
-- 
GitLab


From da2f849e89ed621f3e0688ec5ba92725ed9f0f92 Mon Sep 17 00:00:00 2001
From: Fabian Frederick <fabf@skynet.be>
Date: Sun, 23 Aug 2020 20:15:37 +0200
Subject: [PATCH 0810/1341] selftests: netfilter: fix header example

nft_flowtable.sh is made for bash not sh.
Also give values which not return "RTNETLINK answers: Invalid argument"

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 tools/testing/selftests/netfilter/nft_flowtable.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/netfilter/nft_flowtable.sh b/tools/testing/selftests/netfilter/nft_flowtable.sh
index a47d1d8322104..28e32fddf9b2c 100755
--- a/tools/testing/selftests/netfilter/nft_flowtable.sh
+++ b/tools/testing/selftests/netfilter/nft_flowtable.sh
@@ -11,7 +11,7 @@
 # result in fragmentation and/or PMTU discovery.
 #
 # You can check with different Orgininator/Link/Responder MTU eg:
-# sh nft_flowtable.sh -o1000 -l500 -r100
+# nft_flowtable.sh -o8000 -l1500 -r2000
 #
 
 
-- 
GitLab


From a7bf670ebe192120cbe0a0ab6448baad6fbf7983 Mon Sep 17 00:00:00 2001
From: Fabian Frederick <fabf@skynet.be>
Date: Sun, 23 Aug 2020 20:15:59 +0200
Subject: [PATCH 0811/1341] selftests: netfilter: exit on invalid parameters

exit script with comments when parameters are wrong during address
addition. No need for a message when trying to change MTU with lower
values: output is self-explanatory.
Use short testing sequence to avoid shellcheck warnings
(suggested by Stefano Brivio).

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 .../testing/selftests/netfilter/nft_flowtable.sh  | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/netfilter/nft_flowtable.sh b/tools/testing/selftests/netfilter/nft_flowtable.sh
index 28e32fddf9b2c..dc05c99405979 100755
--- a/tools/testing/selftests/netfilter/nft_flowtable.sh
+++ b/tools/testing/selftests/netfilter/nft_flowtable.sh
@@ -96,10 +96,16 @@ do
 	esac
 done
 
-ip -net nsr1 link set veth0 mtu $omtu
+if ! ip -net nsr1 link set veth0 mtu $omtu; then
+	exit 1
+fi
+
 ip -net ns1 link set eth0 mtu $omtu
 
-ip -net nsr2 link set veth1 mtu $rmtu
+if ! ip -net nsr2 link set veth1 mtu $rmtu; then
+	exit 1
+fi
+
 ip -net ns2 link set eth0 mtu $rmtu
 
 # transfer-net between nsr1 and nsr2.
@@ -120,7 +126,10 @@ for i in 1 2; do
   ip -net ns$i route add default via 10.0.$i.1
   ip -net ns$i addr add dead:$i::99/64 dev eth0
   ip -net ns$i route add default via dead:$i::1
-  ip netns exec ns$i sysctl net.ipv4.tcp_no_metrics_save=1 > /dev/null
+  if ! ip netns exec ns$i sysctl net.ipv4.tcp_no_metrics_save=1 > /dev/null; then
+	echo "ERROR: Check Originator/Responder values (problem during address addition)"
+	exit 1
+  fi
 
   # don't set ip DF bit for first two tests
   ip netns exec ns$i sysctl net.ipv4.ip_no_pmtu_disc=1 > /dev/null
-- 
GitLab


From d721b68654d0fcf8930fd0d2edfff78df82fb8c4 Mon Sep 17 00:00:00 2001
From: Fabian Frederick <fabf@skynet.be>
Date: Sun, 23 Aug 2020 20:17:07 +0200
Subject: [PATCH 0812/1341] selftests: netfilter: remove unused variable in
 make_file()

'who' variable was not used in make_file()
Problem found using Shellcheck

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 tools/testing/selftests/netfilter/nft_flowtable.sh | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/netfilter/nft_flowtable.sh b/tools/testing/selftests/netfilter/nft_flowtable.sh
index dc05c99405979..1058952d1b364 100755
--- a/tools/testing/selftests/netfilter/nft_flowtable.sh
+++ b/tools/testing/selftests/netfilter/nft_flowtable.sh
@@ -212,7 +212,6 @@ ns2out=$(mktemp)
 make_file()
 {
 	name=$1
-	who=$2
 
 	SIZE=$((RANDOM % (1024 * 8)))
 	TSIZE=$((SIZE * 1024))
@@ -304,8 +303,8 @@ test_tcp_forwarding_nat()
 	return $lret
 }
 
-make_file "$ns1in" "ns1"
-make_file "$ns2in" "ns2"
+make_file "$ns1in"
+make_file "$ns2in"
 
 # First test:
 # No PMTU discovery, nsr1 is expected to fragment packets from ns1 to ns2 as needed.
-- 
GitLab


From 2f4bba4ef77cf01ae805554e8f1d98e57b28f25f Mon Sep 17 00:00:00 2001
From: Fabian Frederick <fabf@skynet.be>
Date: Sun, 23 Aug 2020 20:17:39 +0200
Subject: [PATCH 0813/1341] selftests: netfilter: simplify command testing

Fix some shellcheck SC2181 warnings:
"Check exit code directly with e.g. 'if mycmd;', not indirectly with
$?." as suggested by Stefano Brivio.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 .../selftests/netfilter/nft_flowtable.sh      | 34 ++++++-------------
 1 file changed, 11 insertions(+), 23 deletions(-)

diff --git a/tools/testing/selftests/netfilter/nft_flowtable.sh b/tools/testing/selftests/netfilter/nft_flowtable.sh
index 1058952d1b364..44a8798262369 100755
--- a/tools/testing/selftests/netfilter/nft_flowtable.sh
+++ b/tools/testing/selftests/netfilter/nft_flowtable.sh
@@ -27,8 +27,7 @@ ns2out=""
 log_netns=$(sysctl -n net.netfilter.nf_log_all_netns)
 
 checktool (){
-	$1 > /dev/null 2>&1
-	if [ $? -ne 0 ];then
+	if ! $1 > /dev/null 2>&1; then
 		echo "SKIP: Could not $2"
 		exit $ksft_skip
 	fi
@@ -187,15 +186,13 @@ if [ $? -ne 0 ]; then
 fi
 
 # test basic connectivity
-ip netns exec ns1 ping -c 1 -q 10.0.2.99 > /dev/null
-if [ $? -ne 0 ];then
+if ! ip netns exec ns1 ping -c 1 -q 10.0.2.99 > /dev/null; then
   echo "ERROR: ns1 cannot reach ns2" 1>&2
   bash
   exit 1
 fi
 
-ip netns exec ns2 ping -c 1 -q 10.0.1.99 > /dev/null
-if [ $? -ne 0 ];then
+if ! ip netns exec ns2 ping -c 1 -q 10.0.1.99 > /dev/null; then
   echo "ERROR: ns2 cannot reach ns1" 1>&2
   exit 1
 fi
@@ -230,8 +227,7 @@ check_transfer()
 	out=$2
 	what=$3
 
-	cmp "$in" "$out" > /dev/null 2>&1
-	if [ $? -ne 0 ] ;then
+	if ! cmp "$in" "$out" > /dev/null 2>&1; then
 		echo "FAIL: file mismatch for $what" 1>&2
 		ls -l "$in"
 		ls -l "$out"
@@ -268,13 +264,11 @@ test_tcp_forwarding_ip()
 
 	wait
 
-	check_transfer "$ns1in" "$ns2out" "ns1 -> ns2"
-	if [ $? -ne 0 ];then
+	if ! check_transfer "$ns1in" "$ns2out" "ns1 -> ns2"; then
 		lret=1
 	fi
 
-	check_transfer "$ns2in" "$ns1out" "ns1 <- ns2"
-	if [ $? -ne 0 ];then
+	if ! check_transfer "$ns2in" "$ns1out" "ns1 <- ns2"; then
 		lret=1
 	fi
 
@@ -308,8 +302,7 @@ make_file "$ns2in"
 
 # First test:
 # No PMTU discovery, nsr1 is expected to fragment packets from ns1 to ns2 as needed.
-test_tcp_forwarding ns1 ns2
-if [ $? -eq 0 ] ;then
+if test_tcp_forwarding ns1 ns2; then
 	echo "PASS: flow offloaded for ns1/ns2"
 else
 	echo "FAIL: flow offload for ns1/ns2:" 1>&2
@@ -340,9 +333,7 @@ table ip nat {
 }
 EOF
 
-test_tcp_forwarding_nat ns1 ns2
-
-if [ $? -eq 0 ] ;then
+if test_tcp_forwarding_nat ns1 ns2; then
 	echo "PASS: flow offloaded for ns1/ns2 with NAT"
 else
 	echo "FAIL: flow offload for ns1/ns2 with NAT" 1>&2
@@ -354,8 +345,7 @@ fi
 # Same as second test, but with PMTU discovery enabled.
 handle=$(ip netns exec nsr1 nft -a list table inet filter | grep something-to-grep-for | cut -d \# -f 2)
 
-ip netns exec nsr1 nft delete rule inet filter forward $handle
-if [ $? -ne 0 ] ;then
+if ! ip netns exec nsr1 nft delete rule inet filter forward $handle; then
 	echo "FAIL: Could not delete large-packet accept rule"
 	exit 1
 fi
@@ -363,8 +353,7 @@ fi
 ip netns exec ns1 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null
 ip netns exec ns2 sysctl net.ipv4.ip_no_pmtu_disc=0 > /dev/null
 
-test_tcp_forwarding_nat ns1 ns2
-if [ $? -eq 0 ] ;then
+if test_tcp_forwarding_nat ns1 ns2; then
 	echo "PASS: flow offloaded for ns1/ns2 with NAT and pmtu discovery"
 else
 	echo "FAIL: flow offload for ns1/ns2 with NAT and pmtu discovery" 1>&2
@@ -410,8 +399,7 @@ ip -net ns2 route del 192.168.10.1 via 10.0.2.1
 ip -net ns2 route add default via 10.0.2.1
 ip -net ns2 route add default via dead:2::1
 
-test_tcp_forwarding ns1 ns2
-if [ $? -eq 0 ] ;then
+if test_tcp_forwarding ns1 ns2; then
 	echo "PASS: ipsec tunnel mode for ns1/ns2"
 else
 	echo "FAIL: ipsec tunnel mode for ns1/ns2"
-- 
GitLab


From 67afbda69645a89adb365f1dfa35181e09cd7e80 Mon Sep 17 00:00:00 2001
From: Fabian Frederick <fabf@skynet.be>
Date: Sun, 23 Aug 2020 20:18:06 +0200
Subject: [PATCH 0814/1341] selftests: netfilter: add command usage

Avoid bad command arguments.
Based on tools/power/cpupower/bench/cpufreq-bench_plot.sh

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 tools/testing/selftests/netfilter/nft_flowtable.sh | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/tools/testing/selftests/netfilter/nft_flowtable.sh b/tools/testing/selftests/netfilter/nft_flowtable.sh
index 44a8798262369..431296c0f91cf 100755
--- a/tools/testing/selftests/netfilter/nft_flowtable.sh
+++ b/tools/testing/selftests/netfilter/nft_flowtable.sh
@@ -86,12 +86,23 @@ omtu=9000
 lmtu=1500
 rmtu=2000
 
+usage(){
+	echo "nft_flowtable.sh [OPTIONS]"
+	echo
+	echo "MTU options"
+	echo "   -o originator"
+	echo "   -l link"
+	echo "   -r responder"
+	exit 1
+}
+
 while getopts "o:l:r:" o
 do
 	case $o in
 		o) omtu=$OPTARG;;
 		l) lmtu=$OPTARG;;
 		r) rmtu=$OPTARG;;
+		*) usage;;
 	esac
 done
 
-- 
GitLab


From ef91bb196b0db1013ef8705367bc2d7944ef696b Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Fri, 28 Aug 2020 17:11:25 +1000
Subject: [PATCH 0815/1341] kernel.h: Silence sparse warning in lower_32_bits

I keep getting sparse warnings in crypto such as:

  CHECK   drivers/crypto/ccree/cc_hash.c
   drivers/crypto/ccree/cc_hash.c:49:9: warning: cast truncates bits from constant value (47b5481dbefa4fa4 becomes befa4fa4)
   drivers/crypto/ccree/cc_hash.c:49:26: warning: cast truncates bits from constant value (db0c2e0d64f98fa7 becomes 64f98fa7)
   [.. many more ..]

This patch removes the warning by adding a mask to keep sparse
happy.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/kernel.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 500def620d8f4..c25b8e41c0ea3 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -186,7 +186,7 @@
  * lower_32_bits - return bits 0-31 of a number
  * @n: the number we're accessing
  */
-#define lower_32_bits(n) ((u32)(n))
+#define lower_32_bits(n) ((u32)((n) & 0xffffffff))
 
 struct completion;
 struct pt_regs;
-- 
GitLab


From a6ce7d7b4adaebc27ee7e78e5ecc378a1cfc221d Mon Sep 17 00:00:00 2001
From: Ziye Yang <ziye.yang@intel.com>
Date: Sat, 22 Aug 2020 00:48:10 +0800
Subject: [PATCH 0816/1341] nvmet-tcp: Fix NULL dereference when a connect data
 comes in h2cdata pdu

When handling commands without in-capsule data, we assign the ttag
assuming we already have the queue commands array allocated (based
on the queue size information in the connect data payload). However
if the connect itself did not send the connect data in-capsule we
have yet to allocate the queue commands,and we will assign a bogus
ttag and suffer a NULL dereference when we receive the corresponding
h2cdata pdu.

Fix this by checking if we already allocated commands before
dereferencing it when handling h2cdata, if we didn't, its for sure a
connect and we should use the preallocated connect command.

Signed-off-by: Ziye Yang <ziye.yang@intel.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/target/tcp.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c
index 9eda91162fe45..8e0d766d27224 100644
--- a/drivers/nvme/target/tcp.c
+++ b/drivers/nvme/target/tcp.c
@@ -160,6 +160,11 @@ static void nvmet_tcp_finish_cmd(struct nvmet_tcp_cmd *cmd);
 static inline u16 nvmet_tcp_cmd_tag(struct nvmet_tcp_queue *queue,
 		struct nvmet_tcp_cmd *cmd)
 {
+	if (unlikely(!queue->nr_cmds)) {
+		/* We didn't allocate cmds yet, send 0xffff */
+		return USHRT_MAX;
+	}
+
 	return cmd - queue->cmds;
 }
 
@@ -866,7 +871,10 @@ static int nvmet_tcp_handle_h2c_data_pdu(struct nvmet_tcp_queue *queue)
 	struct nvme_tcp_data_pdu *data = &queue->pdu.data;
 	struct nvmet_tcp_cmd *cmd;
 
-	cmd = &queue->cmds[data->ttag];
+	if (likely(queue->nr_cmds))
+		cmd = &queue->cmds[data->ttag];
+	else
+		cmd = &queue->connect;
 
 	if (le32_to_cpu(data->data_offset) != cmd->rbytes_done) {
 		pr_err("ttag %u unexpected data offset %u (expected %u)\n",
-- 
GitLab


From d7144f5c4cf4de95fdc3422943cf51c06aeaf7a7 Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Fri, 14 Aug 2020 11:46:51 -0700
Subject: [PATCH 0817/1341] nvme-fabrics: don't check state NVME_CTRL_NEW for
 request acceptance

NVME_CTRL_NEW should never see any I/O, because in order to start
initialization it has to transition to NVME_CTRL_CONNECTING and from
there it will never return to this state.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/fabrics.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 4ec4829d62334..32f61fc5f4c57 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -576,7 +576,6 @@ bool __nvmf_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
 	 * which is require to set the queue live in the appropinquate states.
 	 */
 	switch (ctrl->state) {
-	case NVME_CTRL_NEW:
 	case NVME_CTRL_CONNECTING:
 		if (nvme_is_fabrics(req->cmd) &&
 		    req->cmd->fabrics.fctype == nvme_fabrics_type_connect)
-- 
GitLab


From 7cf0d7c0f3c3b0203aaf81c1bc884924d8fdb9bd Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Thu, 30 Jul 2020 13:24:45 -0700
Subject: [PATCH 0818/1341] nvme: have nvme_wait_freeze_timeout return if it
 timed out

Users can detect if the wait has completed or not and take appropriate
actions based on this information (e.g. weather to continue
initialization or rather fail and schedule another initialization
attempt).

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/core.c | 3 ++-
 drivers/nvme/host/nvme.h | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index c9826ecf80e2a..537dcd900cb53 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4534,7 +4534,7 @@ void nvme_unfreeze(struct nvme_ctrl *ctrl)
 }
 EXPORT_SYMBOL_GPL(nvme_unfreeze);
 
-void nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout)
+int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout)
 {
 	struct nvme_ns *ns;
 
@@ -4545,6 +4545,7 @@ void nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout)
 			break;
 	}
 	up_read(&ctrl->namespaces_rwsem);
+	return timeout;
 }
 EXPORT_SYMBOL_GPL(nvme_wait_freeze_timeout);
 
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index e9cf29449dd17..2910f6caab7d6 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -605,7 +605,7 @@ void nvme_kill_queues(struct nvme_ctrl *ctrl);
 void nvme_sync_queues(struct nvme_ctrl *ctrl);
 void nvme_unfreeze(struct nvme_ctrl *ctrl);
 void nvme_wait_freeze(struct nvme_ctrl *ctrl);
-void nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
+int nvme_wait_freeze_timeout(struct nvme_ctrl *ctrl, long timeout);
 void nvme_start_freeze(struct nvme_ctrl *ctrl);
 
 #define NVME_QID_ANY -1
-- 
GitLab


From d4d61470ae48838f49e668503e840e1520b97162 Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Wed, 5 Aug 2020 18:13:48 -0700
Subject: [PATCH 0819/1341] nvme-tcp: serialize controller teardown sequences

In the timeout handler we may need to complete a request because the
request that timed out may be an I/O that is a part of a serial sequence
of controller teardown or initialization. In order to complete the
request, we need to fence any other context that may compete with us
and complete the request that is timing out.

In this case, we could have a potential double completion in case
a hard-irq or a different competing context triggered error recovery
and is running inflight request cancellation concurrently with the
timeout handler.

Protect using a ctrl teardown_lock to serialize contexts that may
complete a cancelled request due to error recovery or a reset.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/tcp.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 3be4749dbf112..d58a6e2a4ab12 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -124,6 +124,7 @@ struct nvme_tcp_ctrl {
 	struct sockaddr_storage src_addr;
 	struct nvme_ctrl	ctrl;
 
+	struct mutex		teardown_lock;
 	struct work_struct	err_work;
 	struct delayed_work	connect_work;
 	struct nvme_tcp_request async_req;
@@ -1527,7 +1528,6 @@ static void nvme_tcp_stop_queue(struct nvme_ctrl *nctrl, int qid)
 
 	if (!test_and_clear_bit(NVME_TCP_Q_LIVE, &queue->flags))
 		return;
-
 	__nvme_tcp_stop_queue(queue);
 }
 
@@ -1875,6 +1875,7 @@ static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new)
 static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl,
 		bool remove)
 {
+	mutex_lock(&to_tcp_ctrl(ctrl)->teardown_lock);
 	blk_mq_quiesce_queue(ctrl->admin_q);
 	nvme_tcp_stop_queue(ctrl, 0);
 	if (ctrl->admin_tagset) {
@@ -1885,13 +1886,16 @@ static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl,
 	if (remove)
 		blk_mq_unquiesce_queue(ctrl->admin_q);
 	nvme_tcp_destroy_admin_queue(ctrl, remove);
+	mutex_unlock(&to_tcp_ctrl(ctrl)->teardown_lock);
 }
 
 static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl,
 		bool remove)
 {
+	mutex_lock(&to_tcp_ctrl(ctrl)->teardown_lock);
 	if (ctrl->queue_count <= 1)
-		return;
+		goto out;
+	blk_mq_quiesce_queue(ctrl->admin_q);
 	nvme_start_freeze(ctrl);
 	nvme_stop_queues(ctrl);
 	nvme_tcp_stop_io_queues(ctrl);
@@ -1903,6 +1907,8 @@ static void nvme_tcp_teardown_io_queues(struct nvme_ctrl *ctrl,
 	if (remove)
 		nvme_start_queues(ctrl);
 	nvme_tcp_destroy_io_queues(ctrl, remove);
+out:
+	mutex_unlock(&to_tcp_ctrl(ctrl)->teardown_lock);
 }
 
 static void nvme_tcp_reconnect_or_remove(struct nvme_ctrl *ctrl)
@@ -2423,6 +2429,7 @@ static struct nvme_ctrl *nvme_tcp_create_ctrl(struct device *dev,
 			nvme_tcp_reconnect_ctrl_work);
 	INIT_WORK(&ctrl->err_work, nvme_tcp_error_recovery_work);
 	INIT_WORK(&ctrl->ctrl.reset_work, nvme_reset_ctrl_work);
+	mutex_init(&ctrl->teardown_lock);
 
 	if (!(opts->mask & NVMF_OPT_TRSVCID)) {
 		opts->trsvcid =
-- 
GitLab


From 236187c4ed195161dfa4237c7beffbba0c5ae45b Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Tue, 28 Jul 2020 13:16:36 -0700
Subject: [PATCH 0820/1341] nvme-tcp: fix timeout handler

When a request times out in a LIVE state, we simply trigger error
recovery and let the error recovery handle the request cancellation,
however when a request times out in a non LIVE state, we make sure to
complete it immediately as it might block controller setup or teardown
and prevent forward progress.

However tearing down the entire set of I/O and admin queues causes
freeze/unfreeze imbalance (q->mq_freeze_depth) because and is really
an overkill to what we actually need, which is to just fence controller
teardown that may be running, stop the queue, and cancel the request if
it is not already completed.

Now that we have the controller teardown_lock, we can safely serialize
request cancellation. This addresses a hang caused by calling extra
queue freeze on controller namespaces, causing unfreeze to not complete
correctly.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/tcp.c | 56 ++++++++++++++++++++++++++---------------
 1 file changed, 36 insertions(+), 20 deletions(-)

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index d58a6e2a4ab12..dbb661b899ef6 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -465,6 +465,7 @@ static void nvme_tcp_error_recovery(struct nvme_ctrl *ctrl)
 	if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_RESETTING))
 		return;
 
+	dev_warn(ctrl->device, "starting error recovery\n");
 	queue_work(nvme_reset_wq, &to_tcp_ctrl(ctrl)->err_work);
 }
 
@@ -2155,40 +2156,55 @@ static void nvme_tcp_submit_async_event(struct nvme_ctrl *arg)
 	nvme_tcp_queue_request(&ctrl->async_req, true, true);
 }
 
+static void nvme_tcp_complete_timed_out(struct request *rq)
+{
+	struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq);
+	struct nvme_ctrl *ctrl = &req->queue->ctrl->ctrl;
+
+	/* fence other contexts that may complete the command */
+	mutex_lock(&to_tcp_ctrl(ctrl)->teardown_lock);
+	nvme_tcp_stop_queue(ctrl, nvme_tcp_queue_id(req->queue));
+	if (!blk_mq_request_completed(rq)) {
+		nvme_req(rq)->status = NVME_SC_HOST_ABORTED_CMD;
+		blk_mq_complete_request(rq);
+	}
+	mutex_unlock(&to_tcp_ctrl(ctrl)->teardown_lock);
+}
+
 static enum blk_eh_timer_return
 nvme_tcp_timeout(struct request *rq, bool reserved)
 {
 	struct nvme_tcp_request *req = blk_mq_rq_to_pdu(rq);
-	struct nvme_tcp_ctrl *ctrl = req->queue->ctrl;
+	struct nvme_ctrl *ctrl = &req->queue->ctrl->ctrl;
 	struct nvme_tcp_cmd_pdu *pdu = req->pdu;
 
-	/*
-	 * Restart the timer if a controller reset is already scheduled. Any
-	 * timed out commands would be handled before entering the connecting
-	 * state.
-	 */
-	if (ctrl->ctrl.state == NVME_CTRL_RESETTING)
-		return BLK_EH_RESET_TIMER;
-
-	dev_warn(ctrl->ctrl.device,
+	dev_warn(ctrl->device,
 		"queue %d: timeout request %#x type %d\n",
 		nvme_tcp_queue_id(req->queue), rq->tag, pdu->hdr.type);
 
-	if (ctrl->ctrl.state != NVME_CTRL_LIVE) {
+	if (ctrl->state != NVME_CTRL_LIVE) {
 		/*
-		 * Teardown immediately if controller times out while starting
-		 * or we are already started error recovery. all outstanding
-		 * requests are completed on shutdown, so we return BLK_EH_DONE.
+		 * If we are resetting, connecting or deleting we should
+		 * complete immediately because we may block controller
+		 * teardown or setup sequence
+		 * - ctrl disable/shutdown fabrics requests
+		 * - connect requests
+		 * - initialization admin requests
+		 * - I/O requests that entered after unquiescing and
+		 *   the controller stopped responding
+		 *
+		 * All other requests should be cancelled by the error
+		 * recovery work, so it's fine that we fail it here.
 		 */
-		flush_work(&ctrl->err_work);
-		nvme_tcp_teardown_io_queues(&ctrl->ctrl, false);
-		nvme_tcp_teardown_admin_queue(&ctrl->ctrl, false);
+		nvme_tcp_complete_timed_out(rq);
 		return BLK_EH_DONE;
 	}
 
-	dev_warn(ctrl->ctrl.device, "starting error recovery\n");
-	nvme_tcp_error_recovery(&ctrl->ctrl);
-
+	/*
+	 * LIVE state should trigger the normal error recovery which will
+	 * handle completing this request.
+	 */
+	nvme_tcp_error_recovery(ctrl);
 	return BLK_EH_RESET_TIMER;
 }
 
-- 
GitLab


From e5c01f4f7f623e768e868bcc08d8e7ceb03b75d0 Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Thu, 30 Jul 2020 13:25:34 -0700
Subject: [PATCH 0821/1341] nvme-tcp: fix reset hang if controller died in the
 middle of a reset

If the controller becomes unresponsive in the middle of a reset, we will
hang because we are waiting for the freeze to complete, but that cannot
happen since we have commands that are inflight holding the
q_usage_counter, and we can't blindly fail requests that times out.

So give a timeout and if we cannot wait for queue freeze before
unfreezing, fail and have the error handling take care how to proceed
(either schedule a reconnect of remove the controller).

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/tcp.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index dbb661b899ef6..873d6afcbc9ee 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1783,7 +1783,15 @@ static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new)
 
 	if (!new) {
 		nvme_start_queues(ctrl);
-		nvme_wait_freeze(ctrl);
+		if (!nvme_wait_freeze_timeout(ctrl, NVME_IO_TIMEOUT)) {
+			/*
+			 * If we timed out waiting for freeze we are likely to
+			 * be stuck.  Fail the controller initialization just
+			 * to be safe.
+			 */
+			ret = -ENODEV;
+			goto out_wait_freeze_timed_out;
+		}
 		blk_mq_update_nr_hw_queues(ctrl->tagset,
 			ctrl->queue_count - 1);
 		nvme_unfreeze(ctrl);
@@ -1791,6 +1799,9 @@ static int nvme_tcp_configure_io_queues(struct nvme_ctrl *ctrl, bool new)
 
 	return 0;
 
+out_wait_freeze_timed_out:
+	nvme_stop_queues(ctrl);
+	nvme_tcp_stop_io_queues(ctrl);
 out_cleanup_connect_q:
 	if (new)
 		blk_cleanup_queue(ctrl->connect_q);
-- 
GitLab


From 5110f40241d08334375eb0495f174b1d2c07657e Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Wed, 5 Aug 2020 18:13:58 -0700
Subject: [PATCH 0822/1341] nvme-rdma: serialize controller teardown sequences

In the timeout handler we may need to complete a request because the
request that timed out may be an I/O that is a part of a serial sequence
of controller teardown or initialization. In order to complete the
request, we need to fence any other context that may compete with us
and complete the request that is timing out.

In this case, we could have a potential double completion in case
a hard-irq or a different competing context triggered error recovery
and is running inflight request cancellation concurrently with the
timeout handler.

Protect using a ctrl teardown_lock to serialize contexts that may
complete a cancelled request due to error recovery or a reset.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/rdma.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 4c5660201009c..ed387f61f8f74 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -122,6 +122,7 @@ struct nvme_rdma_ctrl {
 	struct sockaddr_storage src_addr;
 
 	struct nvme_ctrl	ctrl;
+	struct mutex		teardown_lock;
 	bool			use_inline_data;
 	u32			io_queues[HCTX_MAX_TYPES];
 };
@@ -997,6 +998,7 @@ static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
 static void nvme_rdma_teardown_admin_queue(struct nvme_rdma_ctrl *ctrl,
 		bool remove)
 {
+	mutex_lock(&ctrl->teardown_lock);
 	blk_mq_quiesce_queue(ctrl->ctrl.admin_q);
 	nvme_rdma_stop_queue(&ctrl->queues[0]);
 	if (ctrl->ctrl.admin_tagset) {
@@ -1007,11 +1009,13 @@ static void nvme_rdma_teardown_admin_queue(struct nvme_rdma_ctrl *ctrl,
 	if (remove)
 		blk_mq_unquiesce_queue(ctrl->ctrl.admin_q);
 	nvme_rdma_destroy_admin_queue(ctrl, remove);
+	mutex_unlock(&ctrl->teardown_lock);
 }
 
 static void nvme_rdma_teardown_io_queues(struct nvme_rdma_ctrl *ctrl,
 		bool remove)
 {
+	mutex_lock(&ctrl->teardown_lock);
 	if (ctrl->ctrl.queue_count > 1) {
 		nvme_start_freeze(&ctrl->ctrl);
 		nvme_stop_queues(&ctrl->ctrl);
@@ -1025,6 +1029,7 @@ static void nvme_rdma_teardown_io_queues(struct nvme_rdma_ctrl *ctrl,
 			nvme_start_queues(&ctrl->ctrl);
 		nvme_rdma_destroy_io_queues(ctrl, remove);
 	}
+	mutex_unlock(&ctrl->teardown_lock);
 }
 
 static void nvme_rdma_free_ctrl(struct nvme_ctrl *nctrl)
@@ -2278,6 +2283,7 @@ static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev,
 		return ERR_PTR(-ENOMEM);
 	ctrl->ctrl.opts = opts;
 	INIT_LIST_HEAD(&ctrl->list);
+	mutex_init(&ctrl->teardown_lock);
 
 	if (!(opts->mask & NVMF_OPT_TRSVCID)) {
 		opts->trsvcid =
-- 
GitLab


From 0475a8dcbcee92a5d22e40c9c6353829fc6294b8 Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Wed, 29 Jul 2020 02:36:03 -0700
Subject: [PATCH 0823/1341] nvme-rdma: fix timeout handler

When a request times out in a LIVE state, we simply trigger error
recovery and let the error recovery handle the request cancellation,
however when a request times out in a non LIVE state, we make sure to
complete it immediately as it might block controller setup or teardown
and prevent forward progress.

However tearing down the entire set of I/O and admin queues causes
freeze/unfreeze imbalance (q->mq_freeze_depth) because and is really
an overkill to what we actually need, which is to just fence controller
teardown that may be running, stop the queue, and cancel the request if
it is not already completed.

Now that we have the controller teardown_lock, we can safely serialize
request cancellation. This addresses a hang caused by calling extra
queue freeze on controller namespaces, causing unfreeze to not complete
correctly.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/rdma.c | 49 +++++++++++++++++++++++++++-------------
 1 file changed, 33 insertions(+), 16 deletions(-)

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index ed387f61f8f74..cb8731f4b3166 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1185,6 +1185,7 @@ static void nvme_rdma_error_recovery(struct nvme_rdma_ctrl *ctrl)
 	if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_RESETTING))
 		return;
 
+	dev_warn(ctrl->ctrl.device, "starting error recovery\n");
 	queue_work(nvme_reset_wq, &ctrl->err_work);
 }
 
@@ -1951,6 +1952,22 @@ static int nvme_rdma_cm_handler(struct rdma_cm_id *cm_id,
 	return 0;
 }
 
+static void nvme_rdma_complete_timed_out(struct request *rq)
+{
+	struct nvme_rdma_request *req = blk_mq_rq_to_pdu(rq);
+	struct nvme_rdma_queue *queue = req->queue;
+	struct nvme_rdma_ctrl *ctrl = queue->ctrl;
+
+	/* fence other contexts that may complete the command */
+	mutex_lock(&ctrl->teardown_lock);
+	nvme_rdma_stop_queue(queue);
+	if (!blk_mq_request_completed(rq)) {
+		nvme_req(rq)->status = NVME_SC_HOST_ABORTED_CMD;
+		blk_mq_complete_request(rq);
+	}
+	mutex_unlock(&ctrl->teardown_lock);
+}
+
 static enum blk_eh_timer_return
 nvme_rdma_timeout(struct request *rq, bool reserved)
 {
@@ -1961,29 +1978,29 @@ nvme_rdma_timeout(struct request *rq, bool reserved)
 	dev_warn(ctrl->ctrl.device, "I/O %d QID %d timeout\n",
 		 rq->tag, nvme_rdma_queue_idx(queue));
 
-	/*
-	 * Restart the timer if a controller reset is already scheduled. Any
-	 * timed out commands would be handled before entering the connecting
-	 * state.
-	 */
-	if (ctrl->ctrl.state == NVME_CTRL_RESETTING)
-		return BLK_EH_RESET_TIMER;
-
 	if (ctrl->ctrl.state != NVME_CTRL_LIVE) {
 		/*
-		 * Teardown immediately if controller times out while starting
-		 * or we are already started error recovery. all outstanding
-		 * requests are completed on shutdown, so we return BLK_EH_DONE.
+		 * If we are resetting, connecting or deleting we should
+		 * complete immediately because we may block controller
+		 * teardown or setup sequence
+		 * - ctrl disable/shutdown fabrics requests
+		 * - connect requests
+		 * - initialization admin requests
+		 * - I/O requests that entered after unquiescing and
+		 *   the controller stopped responding
+		 *
+		 * All other requests should be cancelled by the error
+		 * recovery work, so it's fine that we fail it here.
 		 */
-		flush_work(&ctrl->err_work);
-		nvme_rdma_teardown_io_queues(ctrl, false);
-		nvme_rdma_teardown_admin_queue(ctrl, false);
+		nvme_rdma_complete_timed_out(rq);
 		return BLK_EH_DONE;
 	}
 
-	dev_warn(ctrl->ctrl.device, "starting error recovery\n");
+	/*
+	 * LIVE state should trigger the normal error recovery which will
+	 * handle completing this request.
+	 */
 	nvme_rdma_error_recovery(ctrl);
-
 	return BLK_EH_RESET_TIMER;
 }
 
-- 
GitLab


From 2362acb6785611eda795bfc12e1ea6b202ecf62c Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Thu, 30 Jul 2020 13:42:42 -0700
Subject: [PATCH 0824/1341] nvme-rdma: fix reset hang if controller died in the
 middle of a reset

If the controller becomes unresponsive in the middle of a reset, we
will hang because we are waiting for the freeze to complete, but that
cannot happen since we have commands that are inflight holding the
q_usage_counter, and we can't blindly fail requests that times out.

So give a timeout and if we cannot wait for queue freeze before
unfreezing, fail and have the error handling take care how to
proceed (either schedule a reconnect of remove the controller).

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/rdma.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index cb8731f4b3166..1d8ea5305d60f 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -976,7 +976,15 @@ static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
 
 	if (!new) {
 		nvme_start_queues(&ctrl->ctrl);
-		nvme_wait_freeze(&ctrl->ctrl);
+		if (!nvme_wait_freeze_timeout(&ctrl->ctrl, NVME_IO_TIMEOUT)) {
+			/*
+			 * If we timed out waiting for freeze we are likely to
+			 * be stuck.  Fail the controller initialization just
+			 * to be safe.
+			 */
+			ret = -ENODEV;
+			goto out_wait_freeze_timed_out;
+		}
 		blk_mq_update_nr_hw_queues(ctrl->ctrl.tagset,
 			ctrl->ctrl.queue_count - 1);
 		nvme_unfreeze(&ctrl->ctrl);
@@ -984,6 +992,9 @@ static int nvme_rdma_configure_io_queues(struct nvme_rdma_ctrl *ctrl, bool new)
 
 	return 0;
 
+out_wait_freeze_timed_out:
+	nvme_stop_queues(&ctrl->ctrl);
+	nvme_rdma_stop_io_queues(ctrl);
 out_cleanup_connect_q:
 	if (new)
 		blk_cleanup_queue(ctrl->ctrl.connect_q);
-- 
GitLab


From 7cd49f7576b0c61d6c4a2114cda08cc4d5ce0028 Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Mon, 24 Aug 2020 15:47:25 -0700
Subject: [PATCH 0825/1341] nvme: Fix NULL dereference for pci nvme controllers

PCIe controllers do not have fabric opts, verify they exist before
showing ctrl_loss_tmo or reconnect_delay attributes.

Fixes: 764075fdcb2f ("nvme: expose reconnect_delay and ctrl_loss_tmo via sysfs")
Reported-by: Tobias Markus <tobias@markus-regensburg.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/core.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 537dcd900cb53..e406c3cf55bc1 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3676,6 +3676,10 @@ static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj,
 		return 0;
 	if (a == &dev_attr_hostid.attr && !ctrl->opts)
 		return 0;
+	if (a == &dev_attr_ctrl_loss_tmo.attr && !ctrl->opts)
+		return 0;
+	if (a == &dev_attr_reconnect_delay.attr && !ctrl->opts)
+		return 0;
 
 	return a->mode;
 }
-- 
GitLab


From 70e37988db94aba607d5491a94f80ba08e399b6b Mon Sep 17 00:00:00 2001
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Date: Fri, 21 Aug 2020 09:58:19 +0200
Subject: [PATCH 0826/1341] nvmet-fc: Fix a missed _irqsave version of
 spin_lock in 'nvmet_fc_fod_op_done()'

The way 'spin_lock()' and 'spin_lock_irqsave()' are used is not consistent
in this function.

Use 'spin_lock_irqsave()' also here, as there is no guarantee that
interruptions are disabled at that point, according to surrounding code.

Fixes: a97ec51b37ef ("nvmet_fc: Rework target side abort handling")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/target/fc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c
index 55bafd56166a2..e6861cc10e7db 100644
--- a/drivers/nvme/target/fc.c
+++ b/drivers/nvme/target/fc.c
@@ -2342,9 +2342,9 @@ nvmet_fc_fod_op_done(struct nvmet_fc_fcp_iod *fod)
 			return;
 		if (fcpreq->fcp_error ||
 		    fcpreq->transferred_length != fcpreq->transfer_length) {
-			spin_lock(&fod->flock);
+			spin_lock_irqsave(&fod->flock, flags);
 			fod->abort = true;
-			spin_unlock(&fod->flock);
+			spin_unlock_irqrestore(&fod->flock, flags);
 
 			nvmet_req_complete(&fod->req, NVME_SC_INTERNAL);
 			return;
-- 
GitLab


From 192f6c29bb28bfd0a17e6ad331d09f1ec84143d0 Mon Sep 17 00:00:00 2001
From: Keith Busch <kbusch@kernel.org>
Date: Wed, 26 Aug 2020 10:53:04 -0700
Subject: [PATCH 0827/1341] nvme: fix controller instance leak

If the driver has to unbind from the controller for an early failure
before the subsystem has been set up, there won't be a subsystem holding
the controller's instance, so the controller needs to free its own
instance in this case.

Fixes: 733e4b69d508d ("nvme: Assign subsys instance from first ctrl")
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index e406c3cf55bc1..d6186208abf9a 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -4394,7 +4394,7 @@ static void nvme_free_ctrl(struct device *dev)
 	struct nvme_subsystem *subsys = ctrl->subsys;
 	struct nvme_cel *cel, *next;
 
-	if (subsys && ctrl->instance != subsys->instance)
+	if (!subsys || ctrl->instance != subsys->instance)
 		ida_simple_remove(&nvme_instance_ida, ctrl->instance);
 
 	list_for_each_entry_safe(cel, next, &ctrl->cels, entry) {
-- 
GitLab


From e83d776f9f98b4af18d67f05f9d1f3042dbe62c7 Mon Sep 17 00:00:00 2001
From: Keith Busch <kbusch@kernel.org>
Date: Thu, 27 Aug 2020 10:38:57 -0700
Subject: [PATCH 0828/1341] nvme: only use power of two io boundaries

The kernel requires a power of two for boundaries because that's the
only way it can efficiently split commands that cross them. A
controller, however, may report a non-power of two boundary.

The driver had been rounding the controller's value to one the kernel
can use, but splitting on the wrong boundary provides no benefit on the
device side, and incurs additional submission overhead from non-optimal
splits.

Don't provide any boundary hint if the controller's value can't be used
and log a warning when first scanning a disk's unreported IO boundary.
Since the chunk sector logic has grown, move it to a separate function.

Cc: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/core.c | 47 ++++++++++++++++++++++++++++++++--------
 1 file changed, 38 insertions(+), 9 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index d6186208abf9a..5702a3843746f 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2026,13 +2026,49 @@ static void nvme_update_disk_info(struct gendisk *disk,
 	blk_mq_unfreeze_queue(disk->queue);
 }
 
+static inline bool nvme_first_scan(struct gendisk *disk)
+{
+	/* nvme_alloc_ns() scans the disk prior to adding it */
+	return !(disk->flags & GENHD_FL_UP);
+}
+
+static void nvme_set_chunk_sectors(struct nvme_ns *ns, struct nvme_id_ns *id)
+{
+	struct nvme_ctrl *ctrl = ns->ctrl;
+	u32 iob;
+
+	if ((ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) &&
+	    is_power_of_2(ctrl->max_hw_sectors))
+		iob = ctrl->max_hw_sectors;
+	else
+		iob = nvme_lba_to_sect(ns, le16_to_cpu(id->noiob));
+
+	if (!iob)
+		return;
+
+	if (!is_power_of_2(iob)) {
+		if (nvme_first_scan(ns->disk))
+			pr_warn("%s: ignoring unaligned IO boundary:%u\n",
+				ns->disk->disk_name, iob);
+		return;
+	}
+
+	if (blk_queue_is_zoned(ns->disk->queue)) {
+		if (nvme_first_scan(ns->disk))
+			pr_warn("%s: ignoring zoned namespace IO boundary\n",
+				ns->disk->disk_name);
+		return;
+	}
+
+	blk_queue_chunk_sectors(ns->queue, iob);
+}
+
 static int __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
 {
 	unsigned lbaf = id->flbas & NVME_NS_FLBAS_LBA_MASK;
 	struct nvme_ns *ns = disk->private_data;
 	struct nvme_ctrl *ctrl = ns->ctrl;
 	int ret;
-	u32 iob;
 
 	/*
 	 * If identify namespace failed, use default 512 byte block size so
@@ -2060,12 +2096,6 @@ static int __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
 		return -ENODEV;
 	}
 
-	if ((ctrl->quirks & NVME_QUIRK_STRIPE_SIZE) &&
-	    is_power_of_2(ctrl->max_hw_sectors))
-		iob = ctrl->max_hw_sectors;
-	else
-		iob = nvme_lba_to_sect(ns, le16_to_cpu(id->noiob));
-
 	ns->features = 0;
 	ns->ms = le16_to_cpu(id->lbaf[lbaf].ms);
 	/* the PI implementation requires metadata equal t10 pi tuple size */
@@ -2097,8 +2127,7 @@ static int __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
 		}
 	}
 
-	if (iob && !blk_queue_is_zoned(ns->queue))
-		blk_queue_chunk_sectors(ns->queue, rounddown_pow_of_two(iob));
+	nvme_set_chunk_sectors(ns, id);
 	nvme_update_disk_info(disk, ns, id);
 #ifdef CONFIG_NVME_MULTIPATH
 	if (ns->head->disk) {
-- 
GitLab


From 7ad92f656bddff4cf8f641e0e3b1acd4eb9644cb Mon Sep 17 00:00:00 2001
From: Tong Zhang <ztong0001@gmail.com>
Date: Fri, 28 Aug 2020 10:17:08 -0400
Subject: [PATCH 0829/1341] nvme-pci: cancel nvme device request before
 disabling

This patch addresses an irq free warning and null pointer dereference
error problem when nvme devices got timeout error during initialization.
This problem happens when nvme_timeout() function is called while
nvme_reset_work() is still in execution. This patch fixed the problem by
setting flag of the problematic request to NVME_REQ_CANCELLED before
calling nvme_dev_disable() to make sure __nvme_submit_sync_cmd() returns
an error code and let nvme_submit_sync_cmd() fail gracefully.
The following is console output.

[   62.472097] nvme nvme0: I/O 13 QID 0 timeout, disable controller
[   62.488796] nvme nvme0: could not set timestamp (881)
[   62.494888] ------------[ cut here ]------------
[   62.495142] Trying to free already-free IRQ 11
[   62.495366] WARNING: CPU: 0 PID: 7 at kernel/irq/manage.c:1751 free_irq+0x1f7/0x370
[   62.495742] Modules linked in:
[   62.495902] CPU: 0 PID: 7 Comm: kworker/u4:0 Not tainted 5.8.0+ #8
[   62.496206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-p4
[   62.496772] Workqueue: nvme-reset-wq nvme_reset_work
[   62.497019] RIP: 0010:free_irq+0x1f7/0x370
[   62.497223] Code: e8 ce 49 11 00 48 83 c4 08 4c 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 44 89 f6 48 c70
[   62.498133] RSP: 0000:ffffa96800043d40 EFLAGS: 00010086
[   62.498391] RAX: 0000000000000000 RBX: ffff9b87fc458400 RCX: 0000000000000000
[   62.498741] RDX: 0000000000000001 RSI: 0000000000000096 RDI: ffffffff9693d72c
[   62.499091] RBP: ffff9b87fd4c8f60 R08: ffffa96800043bfd R09: 0000000000000163
[   62.499440] R10: ffffa96800043bf8 R11: ffffa96800043bfd R12: ffff9b87fd4c8e00
[   62.499790] R13: ffff9b87fd4c8ea4 R14: 000000000000000b R15: ffff9b87fd76b000
[   62.500140] FS:  0000000000000000(0000) GS:ffff9b87fdc00000(0000) knlGS:0000000000000000
[   62.500534] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   62.500816] CR2: 0000000000000000 CR3: 000000003aa0a000 CR4: 00000000000006f0
[   62.501165] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   62.501515] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   62.501864] Call Trace:
[   62.501993]  pci_free_irq+0x13/0x20
[   62.502167]  nvme_reset_work+0x5d0/0x12a0
[   62.502369]  ? update_load_avg+0x59/0x580
[   62.502569]  ? ttwu_queue_wakelist+0xa8/0xc0
[   62.502780]  ? try_to_wake_up+0x1a2/0x450
[   62.502979]  process_one_work+0x1d2/0x390
[   62.503179]  worker_thread+0x45/0x3b0
[   62.503361]  ? process_one_work+0x390/0x390
[   62.503568]  kthread+0xf9/0x130
[   62.503726]  ? kthread_park+0x80/0x80
[   62.503911]  ret_from_fork+0x22/0x30
[   62.504090] ---[ end trace de9ed4a70f8d71e2 ]---
[  123.912275] nvme nvme0: I/O 12 QID 0 timeout, disable controller
[  123.914670] nvme nvme0: 1/0/0 default/read/poll queues
[  123.916310] BUG: kernel NULL pointer dereference, address: 0000000000000000
[  123.917469] #PF: supervisor write access in kernel mode
[  123.917725] #PF: error_code(0x0002) - not-present page
[  123.917976] PGD 0 P4D 0
[  123.918109] Oops: 0002 [#1] SMP PTI
[  123.918283] CPU: 0 PID: 7 Comm: kworker/u4:0 Tainted: G        W         5.8.0+ #8
[  123.918650] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-p4
[  123.919219] Workqueue: nvme-reset-wq nvme_reset_work
[  123.919469] RIP: 0010:__blk_mq_alloc_map_and_request+0x21/0x80
[  123.919757] Code: 66 0f 1f 84 00 00 00 00 00 41 55 41 54 55 48 63 ee 53 48 8b 47 68 89 ee 48 89 fb 8b4
[  123.920657] RSP: 0000:ffffa96800043d40 EFLAGS: 00010286
[  123.920912] RAX: ffff9b87fc4fee40 RBX: ffff9b87fc8cb008 RCX: 0000000000000000
[  123.921258] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9b87fc618000
[  123.921602] RBP: 0000000000000000 R08: ffff9b87fdc2c4a0 R09: ffff9b87fc616000
[  123.921949] R10: 0000000000000000 R11: ffff9b87fffd1500 R12: 0000000000000000
[  123.922295] R13: 0000000000000000 R14: ffff9b87fc8cb200 R15: ffff9b87fc8cb000
[  123.922641] FS:  0000000000000000(0000) GS:ffff9b87fdc00000(0000) knlGS:0000000000000000
[  123.923032] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.923312] CR2: 0000000000000000 CR3: 000000003aa0a000 CR4: 00000000000006f0
[  123.923660] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.924007] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  123.924353] Call Trace:
[  123.924479]  blk_mq_alloc_tag_set+0x137/0x2a0
[  123.924694]  nvme_reset_work+0xed6/0x12a0
[  123.924898]  process_one_work+0x1d2/0x390
[  123.925099]  worker_thread+0x45/0x3b0
[  123.925280]  ? process_one_work+0x390/0x390
[  123.925486]  kthread+0xf9/0x130
[  123.925642]  ? kthread_park+0x80/0x80
[  123.925825]  ret_from_fork+0x22/0x30
[  123.926004] Modules linked in:
[  123.926158] CR2: 0000000000000000
[  123.926322] ---[ end trace de9ed4a70f8d71e3 ]---
[  123.926549] RIP: 0010:__blk_mq_alloc_map_and_request+0x21/0x80
[  123.926832] Code: 66 0f 1f 84 00 00 00 00 00 41 55 41 54 55 48 63 ee 53 48 8b 47 68 89 ee 48 89 fb 8b4
[  123.927734] RSP: 0000:ffffa96800043d40 EFLAGS: 00010286
[  123.927989] RAX: ffff9b87fc4fee40 RBX: ffff9b87fc8cb008 RCX: 0000000000000000
[  123.928336] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9b87fc618000
[  123.928679] RBP: 0000000000000000 R08: ffff9b87fdc2c4a0 R09: ffff9b87fc616000
[  123.929025] R10: 0000000000000000 R11: ffff9b87fffd1500 R12: 0000000000000000
[  123.929370] R13: 0000000000000000 R14: ffff9b87fc8cb200 R15: ffff9b87fc8cb000
[  123.929715] FS:  0000000000000000(0000) GS:ffff9b87fdc00000(0000) knlGS:0000000000000000
[  123.930106] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  123.930384] CR2: 0000000000000000 CR3: 000000003aa0a000 CR4: 00000000000006f0
[  123.930731] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  123.931077] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Co-developed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Tong Zhang <ztong0001@gmail.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/pci.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index b673fa4cf5ea8..5e07d56288643 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1249,8 +1249,8 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
 		dev_warn_ratelimited(dev->ctrl.device,
 			 "I/O %d QID %d timeout, disable controller\n",
 			 req->tag, nvmeq->qid);
-		nvme_dev_disable(dev, true);
 		nvme_req(req)->flags |= NVME_REQ_CANCELLED;
+		nvme_dev_disable(dev, true);
 		return BLK_EH_DONE;
 	case NVME_CTRL_RESETTING:
 		return BLK_EH_RESET_TIMER;
@@ -1267,10 +1267,10 @@ static enum blk_eh_timer_return nvme_timeout(struct request *req, bool reserved)
 		dev_warn(dev->ctrl.device,
 			 "I/O %d QID %d timeout, reset controller\n",
 			 req->tag, nvmeq->qid);
+		nvme_req(req)->flags |= NVME_REQ_CANCELLED;
 		nvme_dev_disable(dev, false);
 		nvme_reset_ctrl(&dev->ctrl);
 
-		nvme_req(req)->flags |= NVME_REQ_CANCELLED;
 		return BLK_EH_DONE;
 	}
 
-- 
GitLab


From 15cbff3fbbc631952c346744f862fb294504b5e2 Mon Sep 17 00:00:00 2001
From: Dan Crawford <dnlcrwfrd@gmail.com>
Date: Sat, 29 Aug 2020 12:49:46 +1000
Subject: [PATCH 0830/1341] ALSA: hda - Fix silent audio output and corrupted
 input on MSI X570-A PRO

Following Christian Lachner's patch for Gigabyte X570-based motherboards,
also patch the MSI X570-A PRO motherboard; the ALC1220 codec requires the
same workaround for Clevo laptops to enforce the DAC/mixer connection
path. Set up a quirk entry for that.

I suspect most if all X570 motherboards will require similar patches.

[ The entries reordered in the SSID order -- tiwai ]

Related buglink: https://bugzilla.kernel.org/show_bug.cgi?id=205275
Signed-off-by: Dan Crawford <dnlcrwfrd@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200829024946.5691-1-dnlcrwfrd@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_realtek.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 98789691a479d..2ef8b080d84b1 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -2475,6 +2475,7 @@ static const struct snd_pci_quirk alc882_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x1462, 0x1276, "MSI-GL73", ALC1220_FIXUP_CLEVO_P950),
 	SND_PCI_QUIRK(0x1462, 0x1293, "MSI-GP65", ALC1220_FIXUP_CLEVO_P950),
 	SND_PCI_QUIRK(0x1462, 0x7350, "MSI-7350", ALC889_FIXUP_CD),
+	SND_PCI_QUIRK(0x1462, 0x9c37, "MSI X570-A PRO", ALC1220_FIXUP_CLEVO_P950),
 	SND_PCI_QUIRK(0x1462, 0xda57, "MSI Z270-Gaming", ALC1220_FIXUP_GB_DUAL_CODECS),
 	SND_PCI_QUIRK_VENDOR(0x1462, "MSI", ALC882_FIXUP_GPIO3),
 	SND_PCI_QUIRK(0x147b, 0x107a, "Abit AW9D-MAX", ALC882_FIXUP_ABIT_AW9D_MAX),
-- 
GitLab


From e5fc436f06eef54ef512ea55a9db8eb9f2e76959 Mon Sep 17 00:00:00 2001
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Date: Fri, 28 Aug 2020 10:53:01 +0200
Subject: [PATCH 0831/1341] sparse: use static inline for __chk_{user,io}_ptr()

__chk_user_ptr() & __chk_io_ptr() are dummy extern functions which
only exist to enforce the typechecking of __user or __iomem pointers
in macros when using sparse.

This typechecking is done by inserting a call to these functions.
But the presence of these calls can inhibit some simplifications
and so influence the result of sparse's analysis of context/locking.

Fix this by changing these calls into static inline calls with
an empty body.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
---
 include/linux/compiler_types.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
index 4b33cb385f965..6e390d58a9f8c 100644
--- a/include/linux/compiler_types.h
+++ b/include/linux/compiler_types.h
@@ -11,8 +11,8 @@
 # define __iomem	__attribute__((noderef, address_space(__iomem)))
 # define __percpu	__attribute__((noderef, address_space(__percpu)))
 # define __rcu		__attribute__((noderef, address_space(__rcu)))
-extern void __chk_user_ptr(const volatile void __user *);
-extern void __chk_io_ptr(const volatile void __iomem *);
+static inline void __chk_user_ptr(const volatile void __user *ptr) { }
+static inline void __chk_io_ptr(const volatile void __iomem *ptr) { }
 /* context/locking */
 # define __must_hold(x)	__attribute__((context(x,1,1)))
 # define __acquires(x)	__attribute__((context(x,0,1)))
-- 
GitLab


From c46172147ebbeb70094db48d76ab7945d96c638b Mon Sep 17 00:00:00 2001
From: Florian Westphal <fw@strlen.de>
Date: Wed, 26 Aug 2020 00:07:18 +0200
Subject: [PATCH 0832/1341] netfilter: conntrack: do not auto-delete clash
 entries on reply

Its possible that we have more than one packet with the same ct tuple
simultaneously, e.g. when an application emits n packets on same UDP
socket from multiple threads.

NAT rules might be applied to those packets. With the right set of rules,
n packets will be mapped to m destinations, where at least two packets end
up with the same destination.

When this happens, the existing clash resolution may merge the skb that
is processed after the first has been received with the identical tuple
already in hash table.

However, its possible that this identical tuple is a NAT_CLASH tuple.
In that case the second skb will be sent, but no reply can be received
since the reply that is processed first removes the NAT_CLASH tuple.

Do not auto-delete, this gives a 1 second window for replies to be passed
back to originator.

Packets that are coming later (udp stream case) will not be affected:
they match the original ct entry, not a NAT_CLASH one.

Also prevent NAT_CLASH entries from getting offloaded.

Fixes: 6a757c07e51f ("netfilter: conntrack: allow insertion of clashing entries")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/netfilter/nf_conntrack_proto_udp.c | 26 ++++++++++----------------
 net/netfilter/nft_flow_offload.c       |  2 +-
 2 files changed, 11 insertions(+), 17 deletions(-)

diff --git a/net/netfilter/nf_conntrack_proto_udp.c b/net/netfilter/nf_conntrack_proto_udp.c
index 760ca24228165..af402f458ee02 100644
--- a/net/netfilter/nf_conntrack_proto_udp.c
+++ b/net/netfilter/nf_conntrack_proto_udp.c
@@ -81,18 +81,6 @@ static bool udp_error(struct sk_buff *skb,
 	return false;
 }
 
-static void nf_conntrack_udp_refresh_unreplied(struct nf_conn *ct,
-					       struct sk_buff *skb,
-					       enum ip_conntrack_info ctinfo,
-					       u32 extra_jiffies)
-{
-	if (unlikely(ctinfo == IP_CT_ESTABLISHED_REPLY &&
-		     ct->status & IPS_NAT_CLASH))
-		nf_ct_kill(ct);
-	else
-		nf_ct_refresh_acct(ct, ctinfo, skb, extra_jiffies);
-}
-
 /* Returns verdict for packet, and may modify conntracktype */
 int nf_conntrack_udp_packet(struct nf_conn *ct,
 			    struct sk_buff *skb,
@@ -124,12 +112,15 @@ int nf_conntrack_udp_packet(struct nf_conn *ct,
 
 		nf_ct_refresh_acct(ct, ctinfo, skb, extra);
 
+		/* never set ASSURED for IPS_NAT_CLASH, they time out soon */
+		if (unlikely((ct->status & IPS_NAT_CLASH)))
+			return NF_ACCEPT;
+
 		/* Also, more likely to be important, and not a probe */
 		if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
 			nf_conntrack_event_cache(IPCT_ASSURED, ct);
 	} else {
-		nf_conntrack_udp_refresh_unreplied(ct, skb, ctinfo,
-						   timeouts[UDP_CT_UNREPLIED]);
+		nf_ct_refresh_acct(ct, ctinfo, skb, timeouts[UDP_CT_UNREPLIED]);
 	}
 	return NF_ACCEPT;
 }
@@ -206,12 +197,15 @@ int nf_conntrack_udplite_packet(struct nf_conn *ct,
 	if (test_bit(IPS_SEEN_REPLY_BIT, &ct->status)) {
 		nf_ct_refresh_acct(ct, ctinfo, skb,
 				   timeouts[UDP_CT_REPLIED]);
+
+		if (unlikely((ct->status & IPS_NAT_CLASH)))
+			return NF_ACCEPT;
+
 		/* Also, more likely to be important, and not a probe */
 		if (!test_and_set_bit(IPS_ASSURED_BIT, &ct->status))
 			nf_conntrack_event_cache(IPCT_ASSURED, ct);
 	} else {
-		nf_conntrack_udp_refresh_unreplied(ct, skb, ctinfo,
-						   timeouts[UDP_CT_UNREPLIED]);
+		nf_ct_refresh_acct(ct, ctinfo, skb, timeouts[UDP_CT_UNREPLIED]);
 	}
 	return NF_ACCEPT;
 }
diff --git a/net/netfilter/nft_flow_offload.c b/net/netfilter/nft_flow_offload.c
index 3b9b97aa4b32e..3a6c84fb2c90d 100644
--- a/net/netfilter/nft_flow_offload.c
+++ b/net/netfilter/nft_flow_offload.c
@@ -102,7 +102,7 @@ static void nft_flow_offload_eval(const struct nft_expr *expr,
 	}
 
 	if (nf_ct_ext_exist(ct, NF_CT_EXT_HELPER) ||
-	    ct->status & IPS_SEQ_ADJUST)
+	    ct->status & (IPS_SEQ_ADJUST | IPS_NAT_CLASH))
 		goto out;
 
 	if (!nf_ct_is_confirmed(ct))
-- 
GitLab


From 0a4c56c80f90797e9b9f8426c6aae4c0cf1c9785 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sat, 29 Aug 2020 13:50:56 -0700
Subject: [PATCH 0833/1341] fsldma: fix very broken 32-bit ppc ioread64
 functionality

Commit ef91bb196b0d ("kernel.h: Silence sparse warning in
lower_32_bits") caused new warnings to show in the fsldma driver, but
that commit was not to blame: it only exposed some very incorrect code
that tried to take the low 32 bits of an address.

That made no sense for multiple reasons, the most notable one being that
that code was intentionally limited to only 32-bit ppc builds, so "only
low 32 bits of an address" was completely nonsensical.  There were no
high bits to mask off to begin with.

But even more importantly fropm a correctness standpoint, turning the
address into an integer then caused the subsequent address arithmetic to
be completely wrong too, and the "+1" actually incremented the address
by one, rather than by four.

Which again was incorrect, since the code was reading two 32-bit values
and trying to make a 64-bit end result of it all.  Surprisingly, the
iowrite64() did not suffer from the same odd and incorrect model.

This code has never worked, but it's questionable whether anybody cared:
of the two users that actually read the 64-bit value (by way of some C
preprocessor hackery and eventually the 'get_cdar()' inline function),
one of them explicitly ignored the value, and the other one might just
happen to work despite the incorrect value being read.

This patch at least makes it not fail the build any more, and makes the
logic superficially sane.  Whether it makes any difference to the code
_working_ or not shall remain a mystery.

Compile-tested-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/dma/fsldma.h | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/fsldma.h b/drivers/dma/fsldma.h
index 56f18ae992332..308bed0a560ac 100644
--- a/drivers/dma/fsldma.h
+++ b/drivers/dma/fsldma.h
@@ -205,10 +205,10 @@ struct fsldma_chan {
 #else
 static u64 fsl_ioread64(const u64 __iomem *addr)
 {
-	u32 fsl_addr = lower_32_bits(addr);
-	u64 fsl_addr_hi = (u64)in_le32((u32 *)(fsl_addr + 1)) << 32;
+	u32 val_lo = in_le32((u32 __iomem *)addr);
+	u32 val_hi = in_le32((u32 __iomem *)addr + 1);
 
-	return fsl_addr_hi | in_le32((u32 *)fsl_addr);
+	return ((u64)val_hi << 32) + val_lo;
 }
 
 static void fsl_iowrite64(u64 val, u64 __iomem *addr)
@@ -219,10 +219,10 @@ static void fsl_iowrite64(u64 val, u64 __iomem *addr)
 
 static u64 fsl_ioread64be(const u64 __iomem *addr)
 {
-	u32 fsl_addr = lower_32_bits(addr);
-	u64 fsl_addr_hi = (u64)in_be32((u32 *)fsl_addr) << 32;
+	u32 val_hi = in_be32((u32 __iomem *)addr);
+	u32 val_lo = in_be32((u32 __iomem *)addr + 1);
 
-	return fsl_addr_hi | in_be32((u32 *)(fsl_addr + 1));
+	return ((u64)val_hi << 32) + val_lo;
 }
 
 static void fsl_iowrite64be(u64 val, u64 __iomem *addr)
-- 
GitLab


From 784a0830377d0761834e385975bc46861fea9fa0 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Sun, 30 Aug 2020 19:07:53 +0200
Subject: [PATCH 0834/1341] genirq/matrix: Deal with the sillyness of
 for_each_cpu() on UP

Most of the CPU mask operations behave the same way, but for_each_cpu() and
it's variants ignore the cpumask argument and claim that CPU0 is always in
the mask. This is historical, inconsistent and annoying behaviour.

The matrix allocator uses for_each_cpu() and can be called on UP with an
empty cpumask. The calling code does not expect that this succeeds but
until commit e027fffff799 ("x86/irq: Unbreak interrupt affinity setting")
this went unnoticed. That commit added a WARN_ON() to catch cases which
move an interrupt from one vector to another on the same CPU. The warning
triggers on UP.

Add a check for the cpumask being empty to prevent this.

Fixes: 2f75d9e1c905 ("genirq: Implement bitmap matrix allocator")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
---
 kernel/irq/matrix.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index 30cc217b86318..651a4ad6d711f 100644
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -380,6 +380,13 @@ int irq_matrix_alloc(struct irq_matrix *m, const struct cpumask *msk,
 	unsigned int cpu, bit;
 	struct cpumap *cm;
 
+	/*
+	 * Not required in theory, but matrix_find_best_cpu() uses
+	 * for_each_cpu() which ignores the cpumask on UP .
+	 */
+	if (cpumask_empty(msk))
+		return -EINVAL;
+
 	cpu = matrix_find_best_cpu(m, msk);
 	if (cpu == UINT_MAX)
 		return -ENOSPC;
-- 
GitLab


From 1a21e5b930e8454438ebb707f558b256e4b06ec7 Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Thu, 27 Aug 2020 13:44:03 +0200
Subject: [PATCH 0835/1341] drm/ingenic: Fix leak of device_node pointer

of_graph_get_remote_node() requires of_node_put() to be called on the
device_node pointer when it's no more in use.

Fixes: fc1acf317b01 ("drm/ingenic: Add support for the IPU")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200827114404.36748-1-paul@crapouillou.net
---
 drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index ada990a7f911a..c1bcb93aed2d5 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -978,6 +978,7 @@ static int ingenic_drm_probe(struct platform_device *pdev)
 	}
 
 	drm_of_component_match_add(dev, &match, compare_of, np);
+	of_node_put(np);
 
 	return component_master_add_with_match(dev, &ingenic_master_ops, match);
 }
-- 
GitLab


From 3b5b005ef7d9e2ff1693c1d14a0f4459dcedb4e0 Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul@crapouillou.net>
Date: Thu, 27 Aug 2020 13:44:04 +0200
Subject: [PATCH 0836/1341] drm/ingenic: Fix driver not probing when IPU port
 is missing

Even if support for the IPU was compiled in, we may run on a device
(e.g. the Qi LB60) where the IPU is not available, or simply with an old
devicetree without the IPU node. In that case the ingenic-drm refused to
probe.

Fix the driver so that it will probe even if the IPU node is not present
in devicetree (but then IPU support is disabled of course).

v2: Take a different approach

Fixes: fc1acf317b01 ("drm/ingenic: Add support for the IPU")
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200827114404.36748-2-paul@crapouillou.net
---
 drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index c1bcb93aed2d5..b7074161ccf03 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -673,7 +673,7 @@ static void ingenic_drm_unbind_all(void *d)
 	component_unbind_all(priv->dev, &priv->drm);
 }
 
-static int ingenic_drm_bind(struct device *dev)
+static int ingenic_drm_bind(struct device *dev, bool has_components)
 {
 	struct platform_device *pdev = to_platform_device(dev);
 	const struct jz_soc_info *soc_info;
@@ -808,7 +808,7 @@ static int ingenic_drm_bind(struct device *dev)
 			return ret;
 		}
 
-		if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU)) {
+		if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU) && has_components) {
 			ret = component_bind_all(dev, drm);
 			if (ret) {
 				if (ret != -EPROBE_DEFER)
@@ -939,6 +939,11 @@ static int ingenic_drm_bind(struct device *dev)
 	return ret;
 }
 
+static int ingenic_drm_bind_with_components(struct device *dev)
+{
+	return ingenic_drm_bind(dev, true);
+}
+
 static int compare_of(struct device *dev, void *data)
 {
 	return dev->of_node == data;
@@ -957,7 +962,7 @@ static void ingenic_drm_unbind(struct device *dev)
 }
 
 static const struct component_master_ops ingenic_master_ops = {
-	.bind = ingenic_drm_bind,
+	.bind = ingenic_drm_bind_with_components,
 	.unbind = ingenic_drm_unbind,
 };
 
@@ -968,14 +973,12 @@ static int ingenic_drm_probe(struct platform_device *pdev)
 	struct device_node *np;
 
 	if (!IS_ENABLED(CONFIG_DRM_INGENIC_IPU))
-		return ingenic_drm_bind(dev);
+		return ingenic_drm_bind(dev, false);
 
 	/* IPU is at port address 8 */
 	np = of_graph_get_remote_node(dev->of_node, 8, 0);
-	if (!np) {
-		dev_err(dev, "Unable to get IPU node\n");
-		return -EINVAL;
-	}
+	if (!np)
+		return ingenic_drm_bind(dev, false);
 
 	drm_of_component_match_add(dev, &match, compare_of, np);
 	of_node_put(np);
-- 
GitLab


From f75aef392f869018f78cfedf3c320a6b3fcfda6b Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 30 Aug 2020 16:01:54 -0700
Subject: [PATCH 0837/1341] Linux 5.9-rc3

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index f211681541609..ff5e0731d26df 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 VERSION = 5
 PATCHLEVEL = 9
 SUBLEVEL = 0
-EXTRAVERSION = -rc2
+EXTRAVERSION = -rc3
 NAME = Kleptomaniac Octopus
 
 # *DOCUMENTATION*
-- 
GitLab


From bb8872a1e6bc911869a729240781076ed950764b Mon Sep 17 00:00:00 2001
From: Tuong Lien <tuong.t.lien@dektech.com.au>
Date: Sun, 30 Aug 2020 02:37:55 +0700
Subject: [PATCH 0838/1341] tipc: fix using smp_processor_id() in preemptible

The 'this_cpu_ptr()' is used to obtain the AEAD key' TFM on the current
CPU for encryption, however the execution can be preemptible since it's
actually user-space context, so the 'using smp_processor_id() in
preemptible' has been observed.

We fix the issue by using the 'get/put_cpu_ptr()' API which consists of
a 'preempt_disable()' instead.

Fixes: fc1b6d6de220 ("tipc: introduce TIPC encryption & authentication")
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/tipc/crypto.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/net/tipc/crypto.c b/net/tipc/crypto.c
index c38babaa4e579..7c523dc81575e 100644
--- a/net/tipc/crypto.c
+++ b/net/tipc/crypto.c
@@ -326,7 +326,8 @@ static void tipc_aead_free(struct rcu_head *rp)
 	if (aead->cloned) {
 		tipc_aead_put(aead->cloned);
 	} else {
-		head = *this_cpu_ptr(aead->tfm_entry);
+		head = *get_cpu_ptr(aead->tfm_entry);
+		put_cpu_ptr(aead->tfm_entry);
 		list_for_each_entry_safe(tfm_entry, tmp, &head->list, list) {
 			crypto_free_aead(tfm_entry->tfm);
 			list_del(&tfm_entry->list);
@@ -399,10 +400,15 @@ static void tipc_aead_users_set(struct tipc_aead __rcu *aead, int val)
  */
 static struct crypto_aead *tipc_aead_tfm_next(struct tipc_aead *aead)
 {
-	struct tipc_tfm **tfm_entry = this_cpu_ptr(aead->tfm_entry);
+	struct tipc_tfm **tfm_entry;
+	struct crypto_aead *tfm;
 
+	tfm_entry = get_cpu_ptr(aead->tfm_entry);
 	*tfm_entry = list_next_entry(*tfm_entry, list);
-	return (*tfm_entry)->tfm;
+	tfm = (*tfm_entry)->tfm;
+	put_cpu_ptr(tfm_entry);
+
+	return tfm;
 }
 
 /**
-- 
GitLab


From 1f2f98f2703e8134678fe20982886085631eda23 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Sat, 29 Aug 2020 13:12:48 +0200
Subject: [PATCH 0839/1341] arm64: dts: imx8mq: Fix TMU interrupt property

"interrupt" is not a valid property.  Using proper name fixes dtbs_check
warning:

  arch/arm64/boot/dts/freescale/imx8mq-zii-ultra-zest.dt.yaml: tmu@30260000: 'interrupts' is a required property

Fixes: e464fd2ba4d4 ("arm64: dts: imx8mq: enable the multi sensor TMU")
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm64/boot/dts/freescale/imx8mq.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mq.dtsi b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
index f70435cf9ad57..561fa792fe5a9 100644
--- a/arch/arm64/boot/dts/freescale/imx8mq.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mq.dtsi
@@ -423,7 +423,7 @@ gpio5: gpio@30240000 {
 			tmu: tmu@30260000 {
 				compatible = "fsl,imx8mq-tmu";
 				reg = <0x30260000 0x10000>;
-				interrupt = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+				interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&clk IMX8MQ_CLK_TMU_ROOT>;
 				little-endian;
 				fsl,tmu-range = <0xb0000 0xa0026 0x80048 0x70061>;
-- 
GitLab


From 1ac698790819b83f39fd7ea4f6cdabee9bdd7b38 Mon Sep 17 00:00:00 2001
From: Aleksander Morgado <aleksander@aleksander.es>
Date: Sat, 29 Aug 2020 11:05:39 +0200
Subject: [PATCH 0840/1341] USB: serial: option: add support for
 SIM7070/SIM7080/SIM7090 modules

These modules have 2 different USB layouts:

The default layout with PID 0x9205 (AT+CUSBSELNV=1) exposes 4 TTYs and
an ECM interface:

  T:  Bus=02 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#=  6 Spd=480 MxCh= 0
  D:  Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
  P:  Vendor=1e0e ProdID=9205 Rev=00.00
  S:  Manufacturer=SimTech, Incorporated
  S:  Product=SimTech SIM7080
  S:  SerialNumber=1234567890ABCDEF
  C:  #Ifs= 6 Cfg#= 1 Atr=e0 MxPwr=500mA
  I:  If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x4 Alt= 0 #EPs= 1 Cls=02(commc) Sub=06 Prot=00 Driver=cdc_ether
  I:  If#=0x5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=cdc_ether

The purpose of each TTY is as follows:
 * ttyUSB0: DIAG/QCDM port.
 * ttyUSB1: GNSS data.
 * ttyUSB2: AT-capable port (control).
 * ttyUSB3: AT-capable port (data).

In the secondary layout with PID=0x9206 (AT+CUSBSELNV=86) the module
exposes 6 TTY ports:

  T:  Bus=02 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#=  8 Spd=480 MxCh= 0
  D:  Ver= 2.00 Cls=02(commc) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
  P:  Vendor=1e0e ProdID=9206 Rev=00.00
  S:  Manufacturer=SimTech, Incorporated
  S:  Product=SimTech SIM7080
  S:  SerialNumber=1234567890ABCDEF
  C:  #Ifs= 6 Cfg#= 1 Atr=e0 MxPwr=500mA
  I:  If#=0x0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x3 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x4 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
  I:  If#=0x5 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=option

The purpose of each TTY is as follows:
 * ttyUSB0: DIAG/QCDM port.
 * ttyUSB1: GNSS data.
 * ttyUSB2: AT-capable port (control).
 * ttyUSB3: QFLOG interface.
 * ttyUSB4: DAM interface.
 * ttyUSB5: AT-capable port (data).

Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/serial/option.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 89b3192af3269..01c5b452c6ea0 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1819,6 +1819,8 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9003, 0xff) },	/* Simcom SIM7500/SIM7600 MBIM mode */
 	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9011, 0xff),	/* Simcom SIM7500/SIM7600 RNDIS mode */
 	  .driver_info = RSVD(7) },
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9205, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT+ECM mode */
+	{ USB_DEVICE_INTERFACE_CLASS(0x1e0e, 0x9206, 0xff) },	/* Simcom SIM7070/SIM7080/SIM7090 AT-only mode */
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X060S_X200),
 	  .driver_info = NCTRL(0) | NCTRL(1) | RSVD(4) },
 	{ USB_DEVICE(ALCATEL_VENDOR_ID, ALCATEL_PRODUCT_X220_X500D),
-- 
GitLab


From 2bb70f0a4b238323e4e2f392fc3ddeb5b7208c9e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Mork?= <bjorn@mork.no>
Date: Sat, 29 Aug 2020 15:42:50 +0200
Subject: [PATCH 0841/1341] USB: serial: option: support dynamic Quectel USB
 compositions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The USB composition, defining the set of exported functions, is dynamic
in newer Quectel modems.  Default functions can be disabled and
alternative functions can be enabled instead.  The alternatives
includes class functions using interface pairs, which should be
handled by the respective class drivers.

Active interfaces are numbered consecutively, so static
blacklisting based on interface numbers will fail when the
composition changes.  An example of such an error, where the
option driver has bound to the CDC ECM data interface,
preventing cdc_ether from handling this function:

 T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
 D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
 P: Vendor=2c7c ProdID=0125 Rev= 3.18
 S: Manufacturer=Quectel
 S: Product=EC25-AF
 C:* #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
 A: FirstIf#= 4 IfCount= 2 Cls=02(comm.) Sub=06 Prot=00
 I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
 E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 I:* If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
 E: Ad=83(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
 E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
 E: Ad=85(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
 E: Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
 E: Ad=87(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
 E: Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 I:* If#= 4 Alt= 0 #EPs= 1 Cls=02(comm.) Sub=06 Prot=00 Driver=(none)
 E: Ad=89(I) Atr=03(Int.) MxPS= 16 Ivl=32ms
 I:* If#= 5 Alt= 0 #EPs= 0 Cls=0a(data ) Sub=00 Prot=00 Driver=option
 I: If#= 5 Alt= 1 #EPs= 2 Cls=0a(data ) Sub=00 Prot=00 Driver=option
 E: Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

Another device with the same id gets correct drivers, since the
interface of the network function happens to be blacklisted by option:

 T: Bus=01 Lev=02 Prnt=02 Port=01 Cnt=01 Dev#= 3 Spd=480 MxCh= 0
 D: Ver= 2.00 Cls=ef(misc ) Sub=02 Prot=01 MxPS=64 #Cfgs= 1
 P: Vendor=2c7c ProdID=0125 Rev= 3.18
 S: Manufacturer=Android
 S: Product=Android
 C:* #Ifs= 5 Cfg#= 1 Atr=a0 MxPwr=500mA
 I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=option
 E: Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 I:* If#= 1 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
 E: Ad=83(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
 E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
 E: Ad=85(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
 E: Ad=84(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=option
 E: Ad=87(I) Atr=03(Int.) MxPS= 10 Ivl=32ms
 E: Ad=86(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
 E: Ad=89(I) Atr=03(Int.) MxPS= 8 Ivl=32ms
 E: Ad=88(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
 E: Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

Change rules for EC21, EC25, BG96 and EG95 to match vendor specific
serial functions only, to prevent binding to class functions. Require
2 endpoints on ff/ff/ff functions, avoiding the 3 endpoint QMI/RMNET
network functions.

Cc: AceLan Kao <acelan.kao@canonical.com>
Cc: Sebastian Sjoholm <ssjoholm@mac.com>
Cc: Dan Williams <dcbw@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/usb/serial/option.c | 20 ++++++++++++--------
 1 file changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/usb/serial/option.c b/drivers/usb/serial/option.c
index 01c5b452c6ea0..0c6f160a214ab 100644
--- a/drivers/usb/serial/option.c
+++ b/drivers/usb/serial/option.c
@@ -1094,14 +1094,18 @@ static const struct usb_device_id option_ids[] = {
 	{ USB_DEVICE(QUALCOMM_VENDOR_ID, UBLOX_PRODUCT_R410M),
 	  .driver_info = RSVD(1) | RSVD(3) },
 	/* Quectel products using Quectel vendor ID */
-	{ USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC21),
-	  .driver_info = RSVD(4) },
-	{ USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC25),
-	  .driver_info = RSVD(4) },
-	{ USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EG95),
-	  .driver_info = RSVD(4) },
-	{ USB_DEVICE(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_BG96),
-	  .driver_info = RSVD(4) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC21, 0xff, 0xff, 0xff),
+	  .driver_info = NUMEP2 },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC21, 0xff, 0, 0) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC25, 0xff, 0xff, 0xff),
+	  .driver_info = NUMEP2 },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EC25, 0xff, 0, 0) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EG95, 0xff, 0xff, 0xff),
+	  .driver_info = NUMEP2 },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EG95, 0xff, 0, 0) },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_BG96, 0xff, 0xff, 0xff),
+	  .driver_info = NUMEP2 },
+	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_BG96, 0xff, 0, 0) },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EP06, 0xff, 0xff, 0xff),
 	  .driver_info = RSVD(1) | RSVD(2) | RSVD(3) | RSVD(4) | NUMEP2 },
 	{ USB_DEVICE_AND_INTERFACE_INFO(QUECTEL_VENDOR_ID, QUECTEL_PRODUCT_EP06, 0xff, 0, 0) },
-- 
GitLab


From 77df710ba633dfb6c65c65cf99ea9e084a1c9933 Mon Sep 17 00:00:00 2001
From: Nirenjan Krishnan <nirenjan@gmail.com>
Date: Sun, 30 Aug 2020 17:48:59 -0700
Subject: [PATCH 0842/1341] HID: quirks: Set INCREMENT_USAGE_ON_DUPLICATE for
 all Saitek X52 devices

The Saitek X52 family of joysticks has a pair of axes that were
originally (by the Windows driver) used as mouse pointer controls. The
corresponding usage page is the Game Controls page, which is not
recognized by the generic HID driver, and therefore, both axes get
mapped to ABS_MISC. The quirk makes the second axis get mapped to
ABS_MISC+1, and therefore made available separately.

One Saitek X52 device is already fixed. This patch fixes the other two
known devices with VID/PID 06a3:0255 and 06a3:0762.

Signed-off-by: Nirenjan Krishnan <nirenjan@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-ids.h    | 2 ++
 drivers/hid/hid-quirks.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index a8e3b2796be80..b1daab0447cdd 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1015,6 +1015,8 @@
 #define USB_DEVICE_ID_SAITEK_RAT9	0x0cfa
 #define USB_DEVICE_ID_SAITEK_MMO7	0x0cd0
 #define USB_DEVICE_ID_SAITEK_X52	0x075c
+#define USB_DEVICE_ID_SAITEK_X52_2	0x0255
+#define USB_DEVICE_ID_SAITEK_X52_PRO	0x0762
 
 #define USB_VENDOR_ID_SAMSUNG		0x0419
 #define USB_DEVICE_ID_SAMSUNG_IR_REMOTE	0x0001
diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index a65aef6a322fb..7a2be0205dfd1 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -150,6 +150,8 @@ static const struct hid_device_id hid_quirks[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_RETROUSB, USB_DEVICE_ID_RETROUSB_SNES_RETROPORT), HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_RUMBLEPAD), HID_QUIRK_BADPAD },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_X52), HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_X52_2), HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_X52_PRO), HID_QUIRK_INCREMENT_USAGE_ON_DUPLICATE },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SEMICO, USB_DEVICE_ID_SEMICO_USB_KEYKOARD2), HID_QUIRK_NO_INIT_REPORTS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SEMICO, USB_DEVICE_ID_SEMICO_USB_KEYKOARD), HID_QUIRK_NO_INIT_REPORTS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SENNHEISER, USB_DEVICE_ID_SENNHEISER_BTD500USB), HID_QUIRK_NOGET },
-- 
GitLab


From 724a419ea28f7514a391e80040230f69cf626707 Mon Sep 17 00:00:00 2001
From: Nicholas Miell <nmiell@gmail.com>
Date: Fri, 28 Aug 2020 21:14:29 -0700
Subject: [PATCH 0843/1341] HID: microsoft: Add rumble support for the 8bitdo
 SN30 Pro+ controller

When operating in XInput mode, the 8bitdo SN30 Pro+ requires the same
quirk as the official Xbox One Bluetooth controllers for rumble to
function.

Other controllers like the N30 Pro 2, SF30 Pro, SN30 Pro, etc. probably
also need this quirk, but I do not have the hardware to test.

Signed-off-by: Nicholas Miell <nmiell@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-ids.h       | 1 +
 drivers/hid/hid-microsoft.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index b1daab0447cdd..74fc1df6e3c27 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -850,6 +850,7 @@
 #define USB_DEVICE_ID_MS_POWER_COVER     0x07da
 #define USB_DEVICE_ID_MS_XBOX_ONE_S_CONTROLLER	0x02fd
 #define USB_DEVICE_ID_MS_PIXART_MOUSE    0x00cb
+#define USB_DEVICE_ID_8BITDO_SN30_PRO_PLUS      0x02e0
 
 #define USB_VENDOR_ID_MOJO		0x8282
 #define USB_DEVICE_ID_RETRO_ADAPTER	0x3201
diff --git a/drivers/hid/hid-microsoft.c b/drivers/hid/hid-microsoft.c
index 2d8b589201a4e..8cb1ca1936e42 100644
--- a/drivers/hid/hid-microsoft.c
+++ b/drivers/hid/hid-microsoft.c
@@ -451,6 +451,8 @@ static const struct hid_device_id ms_devices[] = {
 		.driver_data = MS_SURFACE_DIAL },
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_MS_XBOX_ONE_S_CONTROLLER),
 		.driver_data = MS_QUIRK_FF },
+	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_MICROSOFT, USB_DEVICE_ID_8BITDO_SN30_PRO_PLUS),
+		.driver_data = MS_QUIRK_FF },
 	{ }
 };
 MODULE_DEVICE_TABLE(hid, ms_devices);
-- 
GitLab


From ad7a7acaedcf45071c822b6c983f9c1e084041c9 Mon Sep 17 00:00:00 2001
From: Roger Quadros <rogerq@ti.com>
Date: Mon, 24 Aug 2020 10:51:26 +0300
Subject: [PATCH 0844/1341] phy: omap-usb2-phy: disable PHY charger detect

AM654x PG1.0 has a silicon bug that D+ is pulled high after POR, which
could cause enumeration failure with some USB hubs.  Disabling the
USB2_PHY Charger Detect function will put D+ into the normal state.

This addresses Silicon Errata:
i2075 - "USB2PHY: USB2PHY Charger Detect is Enabled by Default Without VBUS
Presence"

Signed-off-by: Roger Quadros <rogerq@ti.com>
Tested-by: Jan Kiszka <jan.kiszka@siemens.com>
Link: https://lore.kernel.org/r/20200824075127.14902-2-rogerq@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/phy/ti/phy-omap-usb2.c | 47 +++++++++++++++++++++++++++++-----
 1 file changed, 40 insertions(+), 7 deletions(-)

diff --git a/drivers/phy/ti/phy-omap-usb2.c b/drivers/phy/ti/phy-omap-usb2.c
index cb2dd3230fa76..507f79d14adb8 100644
--- a/drivers/phy/ti/phy-omap-usb2.c
+++ b/drivers/phy/ti/phy-omap-usb2.c
@@ -22,10 +22,15 @@
 #include <linux/mfd/syscon.h>
 #include <linux/regmap.h>
 #include <linux/of_platform.h>
+#include <linux/sys_soc.h>
 
 #define USB2PHY_ANA_CONFIG1		0x4c
 #define USB2PHY_DISCON_BYP_LATCH	BIT(31)
 
+#define USB2PHY_CHRG_DET			0x14
+#define USB2PHY_CHRG_DET_USE_CHG_DET_REG	BIT(29)
+#define USB2PHY_CHRG_DET_DIS_CHG_DET		BIT(28)
+
 /* SoC Specific USB2_OTG register definitions */
 #define AM654_USB2_OTG_PD		BIT(8)
 #define AM654_USB2_VBUS_DET_EN		BIT(5)
@@ -43,6 +48,7 @@
 #define OMAP_USB2_HAS_START_SRP			BIT(0)
 #define OMAP_USB2_HAS_SET_VBUS			BIT(1)
 #define OMAP_USB2_CALIBRATE_FALSE_DISCONNECT	BIT(2)
+#define OMAP_USB2_DISABLE_CHRG_DET		BIT(3)
 
 struct omap_usb {
 	struct usb_phy		phy;
@@ -236,6 +242,13 @@ static int omap_usb_init(struct phy *x)
 		omap_usb_writel(phy->phy_base, USB2PHY_ANA_CONFIG1, val);
 	}
 
+	if (phy->flags & OMAP_USB2_DISABLE_CHRG_DET) {
+		val = omap_usb_readl(phy->phy_base, USB2PHY_CHRG_DET);
+		val |= USB2PHY_CHRG_DET_USE_CHG_DET_REG |
+		       USB2PHY_CHRG_DET_DIS_CHG_DET;
+		omap_usb_writel(phy->phy_base, USB2PHY_CHRG_DET, val);
+	}
+
 	return 0;
 }
 
@@ -329,6 +342,26 @@ static const struct of_device_id omap_usb2_id_table[] = {
 };
 MODULE_DEVICE_TABLE(of, omap_usb2_id_table);
 
+static void omap_usb2_init_errata(struct omap_usb *phy)
+{
+	static const struct soc_device_attribute am65x_sr10_soc_devices[] = {
+		{ .family = "AM65X", .revision = "SR1.0" },
+		{ /* sentinel */ }
+	};
+
+	/*
+	 * Errata i2075: USB2PHY: USB2PHY Charger Detect is Enabled by
+	 * Default Without VBUS Presence.
+	 *
+	 * AM654x SR1.0 has a silicon bug due to which D+ is pulled high after
+	 * POR, which could cause enumeration failure with some USB hubs.
+	 * Disabling the USB2_PHY Charger Detect function will put D+
+	 * into the normal state.
+	 */
+	if (soc_device_match(am65x_sr10_soc_devices))
+		phy->flags |= OMAP_USB2_DISABLE_CHRG_DET;
+}
+
 static int omap_usb2_probe(struct platform_device *pdev)
 {
 	struct omap_usb	*phy;
@@ -366,14 +399,14 @@ static int omap_usb2_probe(struct platform_device *pdev)
 	phy->mask		= phy_data->mask;
 	phy->power_on		= phy_data->power_on;
 	phy->power_off		= phy_data->power_off;
+	phy->flags		= phy_data->flags;
 
-	if (phy_data->flags & OMAP_USB2_CALIBRATE_FALSE_DISCONNECT) {
-		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-		phy->phy_base = devm_ioremap_resource(&pdev->dev, res);
-		if (IS_ERR(phy->phy_base))
-			return PTR_ERR(phy->phy_base);
-		phy->flags |= OMAP_USB2_CALIBRATE_FALSE_DISCONNECT;
-	}
+	omap_usb2_init_errata(phy);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	phy->phy_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(phy->phy_base))
+		return PTR_ERR(phy->phy_base);
 
 	phy->syscon_phy_power = syscon_regmap_lookup_by_phandle(node,
 							"syscon-phy-power");
-- 
GitLab


From 922ff0759a16299e24cacfc981ac07914d8f1826 Mon Sep 17 00:00:00 2001
From: Viresh Kumar <viresh.kumar@linaro.org>
Date: Mon, 31 Aug 2020 13:03:06 +0530
Subject: [PATCH 0845/1341] opp: Don't drop reference for an OPP table that was
 never parsed

dev_pm_opp_remove_table() should drop a reference to the OPP table only
if the DT OPP table was parsed earlier with a call to
dev_pm_opp_of_add_table() earlier. Else it may end up dropping the
reference to the OPP table, which was added as a result of other calls
like dev_pm_opp_set_clkname(). And would hence result in undesirable
behavior later on when caller would try to free the resource again.

Fixes: 03758d60265c ("opp: Replace list_kref with a local counter")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reported-by: Anders Roxell <anders.roxell@linaro.org>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/opp/core.c | 22 ++++++++++++++++------
 drivers/opp/opp.h  |  2 +-
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 9d7fb45b1786d..31ce5d19ee9ef 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1291,13 +1291,19 @@ void dev_pm_opp_remove(struct device *dev, unsigned long freq)
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_remove);
 
-void _opp_remove_all_static(struct opp_table *opp_table)
+bool _opp_remove_all_static(struct opp_table *opp_table)
 {
 	struct dev_pm_opp *opp, *tmp;
+	bool ret = true;
 
 	mutex_lock(&opp_table->lock);
 
-	if (!opp_table->parsed_static_opps || --opp_table->parsed_static_opps)
+	if (!opp_table->parsed_static_opps) {
+		ret = false;
+		goto unlock;
+	}
+
+	if (--opp_table->parsed_static_opps)
 		goto unlock;
 
 	list_for_each_entry_safe(opp, tmp, &opp_table->opp_list, node) {
@@ -1307,6 +1313,8 @@ void _opp_remove_all_static(struct opp_table *opp_table)
 
 unlock:
 	mutex_unlock(&opp_table->lock);
+
+	return ret;
 }
 
 /**
@@ -2409,13 +2417,15 @@ void _dev_pm_opp_find_and_remove_table(struct device *dev)
 		return;
 	}
 
-	_opp_remove_all_static(opp_table);
+	/*
+	 * Drop the extra reference only if the OPP table was successfully added
+	 * with dev_pm_opp_of_add_table() earlier.
+	 **/
+	if (_opp_remove_all_static(opp_table))
+		dev_pm_opp_put_opp_table(opp_table);
 
 	/* Drop reference taken by _find_opp_table() */
 	dev_pm_opp_put_opp_table(opp_table);
-
-	/* Drop reference taken while the OPP table was added */
-	dev_pm_opp_put_opp_table(opp_table);
 }
 
 /**
diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h
index e51646ff279eb..c3fcd571e446d 100644
--- a/drivers/opp/opp.h
+++ b/drivers/opp/opp.h
@@ -212,7 +212,7 @@ struct opp_table {
 
 /* Routines internal to opp core */
 void dev_pm_opp_get(struct dev_pm_opp *opp);
-void _opp_remove_all_static(struct opp_table *opp_table);
+bool _opp_remove_all_static(struct opp_table *opp_table);
 void _get_opp_table_kref(struct opp_table *opp_table);
 int _get_opp_count(struct opp_table *opp_table);
 struct opp_table *_find_opp_table(struct device *dev);
-- 
GitLab


From 54f82df2ba86e2a8e9cbf4036d192366e3905c89 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:56 +0100
Subject: [PATCH 0846/1341] iio:adc:ti-adc081c Fix alignment and data leak
 issues

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses an array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here.  We close both issues by
moving to a suitable structure in the iio_priv().

This data is allocated with kzalloc so no data can leak apart
from previous readings.

The eplicit alignment of ts is necessary to ensure correct padding
on x86_32 where s64 is only aligned to 4 bytes.

Fixes: 08e05d1fce5c ("ti-adc081c: Initial triggered buffer support")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/adc/ti-adc081c.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/adc/ti-adc081c.c b/drivers/iio/adc/ti-adc081c.c
index 9426f70a80059..cf63983a54d99 100644
--- a/drivers/iio/adc/ti-adc081c.c
+++ b/drivers/iio/adc/ti-adc081c.c
@@ -33,6 +33,12 @@ struct adc081c {
 
 	/* 8, 10 or 12 */
 	int bits;
+
+	/* Ensure natural alignment of buffer elements */
+	struct {
+		u16 channel;
+		s64 ts __aligned(8);
+	} scan;
 };
 
 #define REG_CONV_RES 0x00
@@ -128,14 +134,13 @@ static irqreturn_t adc081c_trigger_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct adc081c *data = iio_priv(indio_dev);
-	u16 buf[8]; /* 2 bytes data + 6 bytes padding + 8 bytes timestamp */
 	int ret;
 
 	ret = i2c_smbus_read_word_swapped(data->i2c, REG_CONV_RES);
 	if (ret < 0)
 		goto out;
-	buf[0] = ret;
-	iio_push_to_buffers_with_timestamp(indio_dev, buf,
+	data->scan.channel = ret;
+	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
 					   iio_get_time_ns(indio_dev));
 out:
 	iio_trigger_notify_done(indio_dev->trig);
-- 
GitLab


From a661b571e3682705cb402a5cd1e970586a3ec00f Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:50:57 +0100
Subject: [PATCH 0847/1341] iio:adc:ti-adc084s021 Fix alignment and data leak
 issues.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses an array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here.  We close both issues by
moving to a suitable structure in the iio_priv().

This data is allocated with kzalloc so no data can leak apart from
previous readings.

The force alignment of ts is not strictly necessary in this case
but reduces the fragility of the code.

Fixes: 3691e5a69449 ("iio: adc: add driver for the ti-adc084s021 chip")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Mårten Lindahl <martenli@axis.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/adc/ti-adc084s021.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/adc/ti-adc084s021.c b/drivers/iio/adc/ti-adc084s021.c
index 9017e1e24273b..dfba34834a575 100644
--- a/drivers/iio/adc/ti-adc084s021.c
+++ b/drivers/iio/adc/ti-adc084s021.c
@@ -26,6 +26,11 @@ struct adc084s021 {
 	struct spi_transfer spi_trans;
 	struct regulator *reg;
 	struct mutex lock;
+	/* Buffer used to align data */
+	struct {
+		__be16 channels[4];
+		s64 ts __aligned(8);
+	} scan;
 	/*
 	 * DMA (thus cache coherency maintenance) requires the
 	 * transfer buffers to live in their own cache line.
@@ -141,14 +146,13 @@ static irqreturn_t adc084s021_buffer_trigger_handler(int irq, void *pollfunc)
 	struct iio_poll_func *pf = pollfunc;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct adc084s021 *adc = iio_priv(indio_dev);
-	__be16 data[8] = {0}; /* 4 * 16-bit words of data + 8 bytes timestamp */
 
 	mutex_lock(&adc->lock);
 
-	if (adc084s021_adc_conversion(adc, &data) < 0)
+	if (adc084s021_adc_conversion(adc, adc->scan.channels) < 0)
 		dev_err(&adc->spi->dev, "Failed to read data\n");
 
-	iio_push_to_buffers_with_timestamp(indio_dev, data,
+	iio_push_to_buffers_with_timestamp(indio_dev, &adc->scan,
 					   iio_get_time_ns(indio_dev));
 	mutex_unlock(&adc->lock);
 	iio_trigger_notify_done(indio_dev->trig);
-- 
GitLab


From f8cd222feb82ecd82dcf610fcc15186f55f9c2b5 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:51:02 +0100
Subject: [PATCH 0848/1341] iio:adc:ina2xx Fix timestamp alignment issue.
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses a 32 byte array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here.  We close both issues by
moving to a suitable structure in the iio_priv() data with alignment
explicitly requested.  This data is allocated with kzalloc so no
data can leak apart from previous readings. The explicit alignment
isn't technically needed here, but it reduced fragility and avoids
cut and paste into drivers where it will be needed.

If we want this in older stables will need manual backport due to
driver reworks.

Fixes: c43a102e67db ("iio: ina2xx: add support for TI INA2xx Power Monitors")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Cc: Marc Titinger <mtitinger@baylibre.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/adc/ina2xx-adc.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index 5ed63e8742923..b573ec60a8b8f 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -146,6 +146,11 @@ struct ina2xx_chip_info {
 	int range_vbus; /* Bus voltage maximum in V */
 	int pga_gain_vshunt; /* Shunt voltage PGA gain */
 	bool allow_async_readout;
+	/* data buffer needs space for channel data and timestamp */
+	struct {
+		u16 chan[4];
+		u64 ts __aligned(8);
+	} scan;
 };
 
 static const struct ina2xx_config ina2xx_config[] = {
@@ -738,8 +743,6 @@ static int ina2xx_conversion_ready(struct iio_dev *indio_dev)
 static int ina2xx_work_buffer(struct iio_dev *indio_dev)
 {
 	struct ina2xx_chip_info *chip = iio_priv(indio_dev);
-	/* data buffer needs space for channel data and timestap */
-	unsigned short data[4 + sizeof(s64)/sizeof(short)];
 	int bit, ret, i = 0;
 	s64 time;
 
@@ -758,10 +761,10 @@ static int ina2xx_work_buffer(struct iio_dev *indio_dev)
 		if (ret < 0)
 			return ret;
 
-		data[i++] = val;
+		chip->scan.chan[i++] = val;
 	}
 
-	iio_push_to_buffers_with_timestamp(indio_dev, data, time);
+	iio_push_to_buffers_with_timestamp(indio_dev, &chip->scan, time);
 
 	return 0;
 };
-- 
GitLab


From db8f06d97ec284dc018e2e4890d2e5035fde8630 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Wed, 22 Jul 2020 16:51:03 +0100
Subject: [PATCH 0849/1341] iio:adc:max1118 Fix alignment of timestamp and data
 leak issues

One of a class of bugs pointed out by Lars in a recent review.
iio_push_to_buffers_with_timestamp assumes the buffer used is aligned
to the size of the timestamp (8 bytes).  This is not guaranteed in
this driver which uses an array of smaller elements on the stack.
As Lars also noted this anti pattern can involve a leak of data to
userspace and that indeed can happen here.  We close both issues by
moving to a suitable structure in the iio_priv() data.

This data is allocated with kzalloc so no data can leak apart
from previous readings.

The explicit alignment of ts is necessary to ensure correct padding
on architectures where s64 is only 4 bytes aligned such as x86_32.

Fixes: a9e9c7153e96 ("iio: adc: add max1117/max1118/max1119 ADC driver")
Reported-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: <Stable@vger.kernel.org>
---
 drivers/iio/adc/max1118.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/iio/adc/max1118.c b/drivers/iio/adc/max1118.c
index 01b20e420ac45..6efb0b43d9389 100644
--- a/drivers/iio/adc/max1118.c
+++ b/drivers/iio/adc/max1118.c
@@ -36,6 +36,11 @@ struct max1118 {
 	struct spi_device *spi;
 	struct mutex lock;
 	struct regulator *reg;
+	/* Ensure natural alignment of buffer elements */
+	struct {
+		u8 channels[2];
+		s64 ts __aligned(8);
+	} scan;
 
 	u8 data ____cacheline_aligned;
 };
@@ -166,7 +171,6 @@ static irqreturn_t max1118_trigger_handler(int irq, void *p)
 	struct iio_poll_func *pf = p;
 	struct iio_dev *indio_dev = pf->indio_dev;
 	struct max1118 *adc = iio_priv(indio_dev);
-	u8 data[16] = { }; /* 2x 8-bit ADC data + padding + 8 bytes timestamp */
 	int scan_index;
 	int i = 0;
 
@@ -184,10 +188,10 @@ static irqreturn_t max1118_trigger_handler(int irq, void *p)
 			goto out;
 		}
 
-		data[i] = ret;
+		adc->scan.channels[i] = ret;
 		i++;
 	}
-	iio_push_to_buffers_with_timestamp(indio_dev, data,
+	iio_push_to_buffers_with_timestamp(indio_dev, &adc->scan,
 					   iio_get_time_ns(indio_dev));
 out:
 	mutex_unlock(&adc->lock);
-- 
GitLab


From d53bfdf2f0b2ec2d4bcebc4f1a1257d05f78dc51 Mon Sep 17 00:00:00 2001
From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Date: Sat, 15 Aug 2020 20:13:55 +0200
Subject: [PATCH 0850/1341] iio: adc: meson-saradc: Use the parent device to
 look up the calib data

On the older-gen 32-bit SoCs the meson-saradc driver is used to read the
SoC temperature. This requires reading calibration data from the eFuse.

Looking up the calibration data nvmem-cell requires the OF device_node
pointer to be available in the struct device which is passed to
devm_nvmem_cell_get(). This however got lost with commit 8cb631ccbb1952
("iio: Remove superfluous of_node assignments") from indio_dev->dev. As
devm_nvmem_cell_get() is called in the initialization phase the
device_node is not yet available because the NVMEM cell is looked up
before iio_device_register() is called (which would then set the
device_node automatically).
Use the parent device to look up the NVMEM cell instead to fix this
issue.

Fixes: 8cb631ccbb1952 ("iio: Remove superfluous of_node assignments")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/adc/meson_saradc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 93c2252c0b890..1a9189ba69aec 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -707,7 +707,7 @@ static int meson_sar_adc_temp_sensor_init(struct iio_dev *indio_dev)
 	size_t read_len;
 	int ret;
 
-	temperature_calib = devm_nvmem_cell_get(&indio_dev->dev,
+	temperature_calib = devm_nvmem_cell_get(indio_dev->dev.parent,
 						"temperature_calib");
 	if (IS_ERR(temperature_calib)) {
 		ret = PTR_ERR(temperature_calib);
-- 
GitLab


From 3f1093d83d7164e4705e4232ccf76da54adfda85 Mon Sep 17 00:00:00 2001
From: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Date: Wed, 19 Aug 2020 09:55:25 +0200
Subject: [PATCH 0851/1341] iio: adc: mcp3422: fix locking scope

Locking should be held for the entire reading sequence involving setting
the channel, waiting for the channel switch and reading from the
channel.
If not, reading from a channel can result mixing with the reading from
another channel.

Fixes: 07914c84ba30 ("iio: adc: Add driver for Microchip MCP3422/3/4 high resolution ADC")
Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Link: https://lore.kernel.org/r/20200819075525.1395248-1-angelo.compagnucci@gmail.com
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/iio/adc/mcp3422.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/iio/adc/mcp3422.c b/drivers/iio/adc/mcp3422.c
index 5f1706d1c3c08..219adac2384b7 100644
--- a/drivers/iio/adc/mcp3422.c
+++ b/drivers/iio/adc/mcp3422.c
@@ -96,16 +96,12 @@ static int mcp3422_update_config(struct mcp3422 *adc, u8 newconfig)
 {
 	int ret;
 
-	mutex_lock(&adc->lock);
-
 	ret = i2c_master_send(adc->i2c, &newconfig, 1);
 	if (ret > 0) {
 		adc->config = newconfig;
 		ret = 0;
 	}
 
-	mutex_unlock(&adc->lock);
-
 	return ret;
 }
 
@@ -138,6 +134,8 @@ static int mcp3422_read_channel(struct mcp3422 *adc,
 	u8 config;
 	u8 req_channel = channel->channel;
 
+	mutex_lock(&adc->lock);
+
 	if (req_channel != MCP3422_CHANNEL(adc->config)) {
 		config = adc->config;
 		config &= ~MCP3422_CHANNEL_MASK;
@@ -150,7 +148,11 @@ static int mcp3422_read_channel(struct mcp3422 *adc,
 		msleep(mcp3422_read_times[MCP3422_SAMPLE_RATE(adc->config)]);
 	}
 
-	return mcp3422_read(adc, value, &config);
+	ret = mcp3422_read(adc, value, &config);
+
+	mutex_unlock(&adc->lock);
+
+	return ret;
 }
 
 static int mcp3422_read_raw(struct iio_dev *iio,
-- 
GitLab


From d3a84a8d0dde4e26bc084b36ffcbdc5932ac85e2 Mon Sep 17 00:00:00 2001
From: Max Staudt <max@enpas.org>
Date: Thu, 27 Aug 2020 17:49:00 +0200
Subject: [PATCH 0852/1341] affs: fix basic permission bits to actually work

The basic permission bits (protection bits in AmigaOS) have been broken
in Linux' AFFS - it would only set bits, but never delete them.
Also, contrary to the documentation, the Archived bit was not handled.

Let's fix this for good, and set the bits such that Linux and classic
AmigaOS can coexist in the most peaceful manner.

Also, update the documentation to represent the current state of things.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable@vger.kernel.org
Signed-off-by: Max Staudt <max@enpas.org>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 Documentation/filesystems/affs.rst | 16 ++++++++++------
 fs/affs/amigaffs.c                 | 27 +++++++++++++++++++++++++++
 fs/affs/file.c                     | 26 +++++++++++++++++++++++++-
 3 files changed, 62 insertions(+), 7 deletions(-)

diff --git a/Documentation/filesystems/affs.rst b/Documentation/filesystems/affs.rst
index 7f1a40dce6d3d..5776cbd5fa532 100644
--- a/Documentation/filesystems/affs.rst
+++ b/Documentation/filesystems/affs.rst
@@ -110,13 +110,15 @@ The Amiga protection flags RWEDRWEDHSPARWED are handled as follows:
 
   - R maps to r for user, group and others. On directories, R implies x.
 
-  - If both W and D are allowed, w will be set.
+  - W maps to w.
 
   - E maps to x.
 
-  - H and P are always retained and ignored under Linux.
+  - D is ignored.
 
-  - A is always reset when a file is written to.
+  - H, S and P are always retained and ignored under Linux.
+
+  - A is cleared when a file is written to.
 
 User id and group id will be used unless set[gu]id are given as mount
 options. Since most of the Amiga file systems are single user systems
@@ -128,11 +130,13 @@ Linux -> Amiga:
 
 The Linux rwxrwxrwx file mode is handled as follows:
 
-  - r permission will set R for user, group and others.
+  - r permission will allow R for user, group and others.
+
+  - w permission will allow W for user, group and others.
 
-  - w permission will set W and D for user, group and others.
+  - x permission of the user will allow E for plain files.
 
-  - x permission of the user will set E for plain files.
+  - D will be allowed for user, group and others.
 
   - All other flags (suid, sgid, ...) are ignored and will
     not be retained.
diff --git a/fs/affs/amigaffs.c b/fs/affs/amigaffs.c
index f708c45d5f664..29f11e10a7c7d 100644
--- a/fs/affs/amigaffs.c
+++ b/fs/affs/amigaffs.c
@@ -420,24 +420,51 @@ affs_mode_to_prot(struct inode *inode)
 	u32 prot = AFFS_I(inode)->i_protect;
 	umode_t mode = inode->i_mode;
 
+	/*
+	 * First, clear all RWED bits for owner, group, other.
+	 * Then, recalculate them afresh.
+	 *
+	 * We'll always clear the delete-inhibit bit for the owner, as that is
+	 * the classic single-user mode AmigaOS protection bit and we need to
+	 * stay compatible with all scenarios.
+	 *
+	 * Since multi-user AmigaOS is an extension, we'll only set the
+	 * delete-allow bit if any of the other bits in the same user class
+	 * (group/other) are used.
+	 */
+	prot &= ~(FIBF_NOEXECUTE | FIBF_NOREAD
+		  | FIBF_NOWRITE | FIBF_NODELETE
+		  | FIBF_GRP_EXECUTE | FIBF_GRP_READ
+		  | FIBF_GRP_WRITE   | FIBF_GRP_DELETE
+		  | FIBF_OTR_EXECUTE | FIBF_OTR_READ
+		  | FIBF_OTR_WRITE   | FIBF_OTR_DELETE);
+
+	/* Classic single-user AmigaOS flags. These are inverted. */
 	if (!(mode & 0100))
 		prot |= FIBF_NOEXECUTE;
 	if (!(mode & 0400))
 		prot |= FIBF_NOREAD;
 	if (!(mode & 0200))
 		prot |= FIBF_NOWRITE;
+
+	/* Multi-user extended flags. Not inverted. */
 	if (mode & 0010)
 		prot |= FIBF_GRP_EXECUTE;
 	if (mode & 0040)
 		prot |= FIBF_GRP_READ;
 	if (mode & 0020)
 		prot |= FIBF_GRP_WRITE;
+	if (mode & 0070)
+		prot |= FIBF_GRP_DELETE;
+
 	if (mode & 0001)
 		prot |= FIBF_OTR_EXECUTE;
 	if (mode & 0004)
 		prot |= FIBF_OTR_READ;
 	if (mode & 0002)
 		prot |= FIBF_OTR_WRITE;
+	if (mode & 0007)
+		prot |= FIBF_OTR_DELETE;
 
 	AFFS_I(inode)->i_protect = prot;
 }
diff --git a/fs/affs/file.c b/fs/affs/file.c
index a26a0f96c1197..d91b0133d95da 100644
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -429,6 +429,24 @@ static int affs_write_begin(struct file *file, struct address_space *mapping,
 	return ret;
 }
 
+static int affs_write_end(struct file *file, struct address_space *mapping,
+			  loff_t pos, unsigned int len, unsigned int copied,
+			  struct page *page, void *fsdata)
+{
+	struct inode *inode = mapping->host;
+	int ret;
+
+	ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
+
+	/* Clear Archived bit on file writes, as AmigaOS would do */
+	if (AFFS_I(inode)->i_protect & FIBF_ARCHIVED) {
+		AFFS_I(inode)->i_protect &= ~FIBF_ARCHIVED;
+		mark_inode_dirty(inode);
+	}
+
+	return ret;
+}
+
 static sector_t _affs_bmap(struct address_space *mapping, sector_t block)
 {
 	return generic_block_bmap(mapping,block,affs_get_block);
@@ -438,7 +456,7 @@ const struct address_space_operations affs_aops = {
 	.readpage = affs_readpage,
 	.writepage = affs_writepage,
 	.write_begin = affs_write_begin,
-	.write_end = generic_write_end,
+	.write_end = affs_write_end,
 	.direct_IO = affs_direct_IO,
 	.bmap = _affs_bmap
 };
@@ -795,6 +813,12 @@ static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
 	if (tmp > inode->i_size)
 		inode->i_size = AFFS_I(inode)->mmu_private = tmp;
 
+	/* Clear Archived bit on file writes, as AmigaOS would do */
+	if (AFFS_I(inode)->i_protect & FIBF_ARCHIVED) {
+		AFFS_I(inode)->i_protect &= ~FIBF_ARCHIVED;
+		mark_inode_dirty(inode);
+	}
+
 err_first_bh:
 	unlock_page(page);
 	put_page(page);
-- 
GitLab


From 91a9d50219f6338d874650b4f035f32844be829e Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <natechancellor@gmail.com>
Date: Tue, 25 Aug 2020 16:14:38 -0700
Subject: [PATCH 0853/1341] Documentation/llvm: Improve formatting of commands,
 variables, and arguments

While reviewing a separate patch, I noticed that the formatting of the
commands, variables, and arguments was not in a monospaced font like the
rest of the Kbuild documentation (see kbuild/kconfig.rst for an
example). This is due to a lack of "::" before indented command blocks
and single backticks instead of double backticks for inline formatting.

Add those so that the document looks nicer in an HTML format, while not
ruining the look in plain text.

As a result of this, we can remove the escaped backslashes in the last
code block and move them to single backslashes.

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Documentation/kbuild/llvm.rst | 26 +++++++++++++-------------
 1 file changed, 13 insertions(+), 13 deletions(-)

diff --git a/Documentation/kbuild/llvm.rst b/Documentation/kbuild/llvm.rst
index 2aac50b97921f..334df758dce36 100644
--- a/Documentation/kbuild/llvm.rst
+++ b/Documentation/kbuild/llvm.rst
@@ -23,8 +23,8 @@ supports C and the GNU C extensions required by the kernel, and is pronounced
 Clang
 -----
 
-The compiler used can be swapped out via `CC=` command line argument to `make`.
-`CC=` should be set when selecting a config and during a build.
+The compiler used can be swapped out via ``CC=`` command line argument to ``make``.
+``CC=`` should be set when selecting a config and during a build. ::
 
 	make CC=clang defconfig
 
@@ -34,33 +34,33 @@ Cross Compiling
 ---------------
 
 A single Clang compiler binary will typically contain all supported backends,
-which can help simplify cross compiling.
+which can help simplify cross compiling. ::
 
 	ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- make CC=clang
 
-`CROSS_COMPILE` is not used to prefix the Clang compiler binary, instead
-`CROSS_COMPILE` is used to set a command line flag: `--target <triple>`. For
-example:
+``CROSS_COMPILE`` is not used to prefix the Clang compiler binary, instead
+``CROSS_COMPILE`` is used to set a command line flag: ``--target <triple>``. For
+example: ::
 
 	clang --target aarch64-linux-gnu foo.c
 
 LLVM Utilities
 --------------
 
-LLVM has substitutes for GNU binutils utilities. Kbuild supports `LLVM=1`
-to enable them.
+LLVM has substitutes for GNU binutils utilities. Kbuild supports ``LLVM=1``
+to enable them. ::
 
 	make LLVM=1
 
-They can be enabled individually. The full list of the parameters:
+They can be enabled individually. The full list of the parameters: ::
 
-	make CC=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip \\
-	  OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump OBJSIZE=llvm-size \\
-	  READELF=llvm-readelf HOSTCC=clang HOSTCXX=clang++ HOSTAR=llvm-ar \\
+	make CC=clang LD=ld.lld AR=llvm-ar NM=llvm-nm STRIP=llvm-strip \
+	  OBJCOPY=llvm-objcopy OBJDUMP=llvm-objdump OBJSIZE=llvm-size \
+	  READELF=llvm-readelf HOSTCC=clang HOSTCXX=clang++ HOSTAR=llvm-ar \
 	  HOSTLD=ld.lld
 
 Currently, the integrated assembler is disabled by default. You can pass
-`LLVM_IAS=1` to enable it.
+``LLVM_IAS=1`` to enable it.
 
 Getting Help
 ------------
-- 
GitLab


From 6396feabf7a4104a4ddfecc00b8aac535c631a66 Mon Sep 17 00:00:00 2001
From: Moti Haimovski <mhaimovski@habana.ai>
Date: Wed, 19 Aug 2020 17:40:33 +0300
Subject: [PATCH 0854/1341] habanalabs: prevent user buff overflow

This commit fixes a potential debugfs issue that may occur when
reading the clock gating mask into the user buffer since the
user buffer size was not taken into consideration.

Signed-off-by: Moti Haimovski <mhaimovski@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 drivers/misc/habanalabs/common/debugfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/habanalabs/common/debugfs.c b/drivers/misc/habanalabs/common/debugfs.c
index 37701e4f9d5af..aa77771635d33 100644
--- a/drivers/misc/habanalabs/common/debugfs.c
+++ b/drivers/misc/habanalabs/common/debugfs.c
@@ -982,7 +982,7 @@ static ssize_t hl_clk_gate_read(struct file *f, char __user *buf,
 		return 0;
 
 	sprintf(tmp_buf, "0x%llx\n", hdev->clock_gating_mask);
-	rc = simple_read_from_buffer(buf, strlen(tmp_buf) + 1, ppos, tmp_buf,
+	rc = simple_read_from_buffer(buf, count, ppos, tmp_buf,
 			strlen(tmp_buf) + 1);
 
 	return rc;
-- 
GitLab


From 69c6e18d0ce9980c8c6708f1fdb4ba843f8df172 Mon Sep 17 00:00:00 2001
From: Ofir Bitton <obitton@habana.ai>
Date: Wed, 26 Aug 2020 17:34:26 +0300
Subject: [PATCH 0855/1341] habanalabs: fix report of RAZWI initiator
 coordinates

All initiator coordinates received upon an 'MMU page fault RAZWI
event' should be the routers coordinates, the only exception is the
DMA initiators for which the reported coordinates correspond to
their actual location.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
---
 .../habanalabs/include/gaudi/gaudi_masks.h    | 32 +++++++++----------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/misc/habanalabs/include/gaudi/gaudi_masks.h b/drivers/misc/habanalabs/include/gaudi/gaudi_masks.h
index 13ef6b2887fd4..3510c42d24e31 100644
--- a/drivers/misc/habanalabs/include/gaudi/gaudi_masks.h
+++ b/drivers/misc/habanalabs/include/gaudi/gaudi_masks.h
@@ -378,15 +378,15 @@ enum axi_id {
 	((((y) & RAZWI_INITIATOR_Y_MASK) << RAZWI_INITIATOR_Y_SHIFT) | \
 		(((x) & RAZWI_INITIATOR_X_MASK) << RAZWI_INITIATOR_X_SHIFT))
 
-#define RAZWI_INITIATOR_ID_X_Y_TPC0_NIC0	RAZWI_INITIATOR_ID_X_Y(1, 0)
-#define RAZWI_INITIATOR_ID_X_Y_TPC1		RAZWI_INITIATOR_ID_X_Y(2, 0)
-#define RAZWI_INITIATOR_ID_X_Y_MME0_0		RAZWI_INITIATOR_ID_X_Y(3, 0)
-#define RAZWI_INITIATOR_ID_X_Y_MME0_1		RAZWI_INITIATOR_ID_X_Y(4, 0)
-#define RAZWI_INITIATOR_ID_X_Y_MME1_0		RAZWI_INITIATOR_ID_X_Y(5, 0)
-#define RAZWI_INITIATOR_ID_X_Y_MME1_1		RAZWI_INITIATOR_ID_X_Y(6, 0)
-#define RAZWI_INITIATOR_ID_X_Y_TPC2		RAZWI_INITIATOR_ID_X_Y(7, 0)
+#define RAZWI_INITIATOR_ID_X_Y_TPC0_NIC0	RAZWI_INITIATOR_ID_X_Y(1, 1)
+#define RAZWI_INITIATOR_ID_X_Y_TPC1		RAZWI_INITIATOR_ID_X_Y(2, 1)
+#define RAZWI_INITIATOR_ID_X_Y_MME0_0		RAZWI_INITIATOR_ID_X_Y(3, 1)
+#define RAZWI_INITIATOR_ID_X_Y_MME0_1		RAZWI_INITIATOR_ID_X_Y(4, 1)
+#define RAZWI_INITIATOR_ID_X_Y_MME1_0		RAZWI_INITIATOR_ID_X_Y(5, 1)
+#define RAZWI_INITIATOR_ID_X_Y_MME1_1		RAZWI_INITIATOR_ID_X_Y(6, 1)
+#define RAZWI_INITIATOR_ID_X_Y_TPC2		RAZWI_INITIATOR_ID_X_Y(7, 1)
 #define RAZWI_INITIATOR_ID_X_Y_TPC3_PCI_CPU_PSOC \
-						RAZWI_INITIATOR_ID_X_Y(8, 0)
+						RAZWI_INITIATOR_ID_X_Y(8, 1)
 #define RAZWI_INITIATOR_ID_X_Y_DMA_IF_W_S_0	RAZWI_INITIATOR_ID_X_Y(0, 1)
 #define RAZWI_INITIATOR_ID_X_Y_DMA_IF_E_S_0	RAZWI_INITIATOR_ID_X_Y(9, 1)
 #define RAZWI_INITIATOR_ID_X_Y_DMA_IF_W_S_1	RAZWI_INITIATOR_ID_X_Y(0, 2)
@@ -395,14 +395,14 @@ enum axi_id {
 #define RAZWI_INITIATOR_ID_X_Y_DMA_IF_E_N_0	RAZWI_INITIATOR_ID_X_Y(9, 3)
 #define RAZWI_INITIATOR_ID_X_Y_DMA_IF_W_N_1	RAZWI_INITIATOR_ID_X_Y(0, 4)
 #define RAZWI_INITIATOR_ID_X_Y_DMA_IF_E_N_1	RAZWI_INITIATOR_ID_X_Y(9, 4)
-#define RAZWI_INITIATOR_ID_X_Y_TPC4_NIC1_NIC2	RAZWI_INITIATOR_ID_X_Y(1, 5)
-#define RAZWI_INITIATOR_ID_X_Y_TPC5		RAZWI_INITIATOR_ID_X_Y(2, 5)
-#define RAZWI_INITIATOR_ID_X_Y_MME2_0		RAZWI_INITIATOR_ID_X_Y(3, 5)
-#define RAZWI_INITIATOR_ID_X_Y_MME2_1		RAZWI_INITIATOR_ID_X_Y(4, 5)
-#define RAZWI_INITIATOR_ID_X_Y_MME3_0		RAZWI_INITIATOR_ID_X_Y(5, 5)
-#define RAZWI_INITIATOR_ID_X_Y_MME3_1		RAZWI_INITIATOR_ID_X_Y(6, 5)
-#define RAZWI_INITIATOR_ID_X_Y_TPC6		RAZWI_INITIATOR_ID_X_Y(7, 5)
-#define RAZWI_INITIATOR_ID_X_Y_TPC7_NIC4_NIC5	RAZWI_INITIATOR_ID_X_Y(8, 5)
+#define RAZWI_INITIATOR_ID_X_Y_TPC4_NIC1_NIC2	RAZWI_INITIATOR_ID_X_Y(1, 6)
+#define RAZWI_INITIATOR_ID_X_Y_TPC5		RAZWI_INITIATOR_ID_X_Y(2, 6)
+#define RAZWI_INITIATOR_ID_X_Y_MME2_0		RAZWI_INITIATOR_ID_X_Y(3, 6)
+#define RAZWI_INITIATOR_ID_X_Y_MME2_1		RAZWI_INITIATOR_ID_X_Y(4, 6)
+#define RAZWI_INITIATOR_ID_X_Y_MME3_0		RAZWI_INITIATOR_ID_X_Y(5, 6)
+#define RAZWI_INITIATOR_ID_X_Y_MME3_1		RAZWI_INITIATOR_ID_X_Y(6, 6)
+#define RAZWI_INITIATOR_ID_X_Y_TPC6		RAZWI_INITIATOR_ID_X_Y(7, 6)
+#define RAZWI_INITIATOR_ID_X_Y_TPC7_NIC4_NIC5	RAZWI_INITIATOR_ID_X_Y(8, 6)
 
 #define PSOC_ETR_AXICTL_PROTCTRLBIT1_SHIFT                           1
 
-- 
GitLab


From fd90e3808fd2c207560270c39b86b71af2231aa1 Mon Sep 17 00:00:00 2001
From: Ondrej Jirman <megous@megous.com>
Date: Fri, 28 Aug 2020 14:50:32 +0200
Subject: [PATCH 0856/1341] drm/sun4i: Fix dsi dcs long write function

It's writing too much data. regmap_bulk_write expects number of
register sized chunks to write, not a byte sized length of the
bounce buffer. Bounce buffer needs to be padded too, so that
regmap_bulk_write will not read past the end of the buffer.

Fixes: 133add5b5ad4 ("drm/sun4i: Add Allwinner A31 MIPI-DSI controller support")
Signed-off-by: Ondrej Jirman <megous@megous.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20200828125032.937148-1-megous@megous.com
---
 drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
index aa67cb037e9d1..32d4c3f7fc4eb 100644
--- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
+++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
@@ -889,7 +889,7 @@ static int sun6i_dsi_dcs_write_long(struct sun6i_dsi *dsi,
 	regmap_write(dsi->regs, SUN6I_DSI_CMD_TX_REG(0),
 		     sun6i_dsi_dcs_build_pkt_hdr(dsi, msg));
 
-	bounce = kzalloc(msg->tx_len + sizeof(crc), GFP_KERNEL);
+	bounce = kzalloc(ALIGN(msg->tx_len + sizeof(crc), 4), GFP_KERNEL);
 	if (!bounce)
 		return -ENOMEM;
 
@@ -900,7 +900,7 @@ static int sun6i_dsi_dcs_write_long(struct sun6i_dsi *dsi,
 	memcpy((u8 *)bounce + msg->tx_len, &crc, sizeof(crc));
 	len += sizeof(crc);
 
-	regmap_bulk_write(dsi->regs, SUN6I_DSI_CMD_TX_REG(1), bounce, len);
+	regmap_bulk_write(dsi->regs, SUN6I_DSI_CMD_TX_REG(1), bounce, DIV_ROUND_UP(len, 4));
 	regmap_write(dsi->regs, SUN6I_DSI_CMD_CTL_REG, len + 4 - 1);
 	kfree(bounce);
 
-- 
GitLab


From 08134e79e0ab138db211287ef3a705b09ba45f50 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Fri, 28 Aug 2020 17:01:10 -0700
Subject: [PATCH 0857/1341] microblaze: fix min_low_pfn/max_low_pfn build
 errors

Fix min_low_pfn/max_low_pfn build errors for arch/microblaze/: (e.g.)

  ERROR: "min_low_pfn" [drivers/rpmsg/virtio_rpmsg_bus.ko] undefined!
  ERROR: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu_sink.ko] undefined!
  ERROR: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined!
  ERROR: "min_low_pfn" [drivers/mmc/core/mmc_core.ko] undefined!
  ERROR: "min_low_pfn" [drivers/md/dm-crypt.ko] undefined!
  ERROR: "min_low_pfn" [drivers/net/wireless/ath/ath6kl/ath6kl_sdio.ko] undefined!
  ERROR: "min_low_pfn" [crypto/tcrypt.ko] undefined!
  ERROR: "min_low_pfn" [crypto/asymmetric_keys/asym_tpm.ko] undefined!

Mike had/has an alternate patch for Microblaze:
https://lore.kernel.org/lkml/20200630111519.GA1951986@linux.ibm.com/

David suggested just exporting min_low_pfn & max_low_pfn in
mm/memblock.c:
https://lore.kernel.org/lkml/alpine.DEB.2.22.394.2006291911220.1118534@chino.kir.corp.google.com/

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: David Rientjes <rientjes@google.com>
Cc: linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
 arch/microblaze/mm/init.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 0880a003573d9..3344d4a1fe890 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -46,6 +46,9 @@ unsigned long memory_size;
 EXPORT_SYMBOL(memory_size);
 unsigned long lowmem_size;
 
+EXPORT_SYMBOL(min_low_pfn);
+EXPORT_SYMBOL(max_low_pfn);
+
 #ifdef CONFIG_HIGHMEM
 pte_t *kmap_pte;
 EXPORT_SYMBOL(kmap_pte);
-- 
GitLab


From 9dda51101a77abb05ae49612164523bb91bf92f0 Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:44:22 -0700
Subject: [PATCH 0858/1341] ionic: fix txrx work accounting

Take the tx accounting out of the work_done calculation to
prevent a possible duplicate napi_schedule call when under
high Tx stress but low Rx traffic.

Fixes: b14e4e95f9ec ("ionic: tx separate servicing")
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/pensando/ionic/ionic_txrx.c | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index 8107d32c27673..def65fee27b5a 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -496,9 +496,7 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget)
 	struct ionic_cq *txcq;
 	u32 rx_work_done = 0;
 	u32 tx_work_done = 0;
-	u32 work_done = 0;
 	u32 flags = 0;
-	bool unmask;
 
 	lif = rxcq->bound_q->lif;
 	idev = &lif->ionic->idev;
@@ -512,17 +510,12 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget)
 	if (rx_work_done)
 		ionic_rx_fill_cb(rxcq->bound_q);
 
-	unmask = (rx_work_done < budget) && (tx_work_done < lif->tx_budget);
-
-	if (unmask && napi_complete_done(napi, rx_work_done)) {
+	if (rx_work_done < budget && napi_complete_done(napi, rx_work_done)) {
 		flags |= IONIC_INTR_CRED_UNMASK;
 		DEBUG_STATS_INTR_REARM(rxcq->bound_intr);
-		work_done = rx_work_done;
-	} else {
-		work_done = budget;
 	}
 
-	if (work_done || flags) {
+	if (rx_work_done || flags) {
 		flags |= IONIC_INTR_CRED_RESET_COALESCE;
 		ionic_intr_credits(idev->intr_ctrl, rxcq->bound_intr->index,
 				   tx_work_done + rx_work_done, flags);
@@ -531,7 +524,7 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget)
 	DEBUG_STATS_NAPI_POLL(qcq, rx_work_done);
 	DEBUG_STATS_NAPI_POLL(qcq, tx_work_done);
 
-	return work_done;
+	return rx_work_done;
 }
 
 static dma_addr_t ionic_tx_map_single(struct ionic_queue *q,
-- 
GitLab


From 1a545ebe380bf4c1433e3c136e35a77764fda5ad Mon Sep 17 00:00:00 2001
From: Xie He <xie.he.0141@gmail.com>
Date: Fri, 28 Aug 2020 00:07:52 -0700
Subject: [PATCH 0859/1341] drivers/net/wan/hdlc_cisco: Add hard_header_len

This driver didn't set hard_header_len. This patch sets hard_header_len
for it according to its header_ops->create function.

This driver's header_ops->create function (cisco_hard_header) creates
a header of (struct hdlc_header), so hard_header_len should be set to
sizeof(struct hdlc_header).

Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Acked-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/wan/hdlc_cisco.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wan/hdlc_cisco.c b/drivers/net/wan/hdlc_cisco.c
index d8cba3625c185..444130655d8ea 100644
--- a/drivers/net/wan/hdlc_cisco.c
+++ b/drivers/net/wan/hdlc_cisco.c
@@ -370,6 +370,7 @@ static int cisco_ioctl(struct net_device *dev, struct ifreq *ifr)
 		memcpy(&state(hdlc)->settings, &new_settings, size);
 		spin_lock_init(&state(hdlc)->lock);
 		dev->header_ops = &cisco_header_ops;
+		dev->hard_header_len = sizeof(struct hdlc_header);
 		dev->type = ARPHRD_CISCO;
 		call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, dev);
 		netif_dormant_on(dev);
-- 
GitLab


From 6b6382a857d824c0866056d5736bbcb597a922ed Mon Sep 17 00:00:00 2001
From: Potnuri Bharat Teja <bharat@chelsio.com>
Date: Fri, 28 Aug 2020 21:14:40 +0530
Subject: [PATCH 0860/1341] cxgb4: fix thermal zone device registration

When multiple adapters are present in the system, pci hot-removing second
adapter leads to the following warning as both the adapters registered
thermal zone device with same thermal zone name/type.
Therefore, use unique thermal zone name during thermal zone device
initialization. Also mark thermal zone dev NULL once unregistered.

[  414.370143] ------------[ cut here ]------------
[  414.370944] sysfs group 'power' not found for kobject 'hwmon0'
[  414.371747] WARNING: CPU: 9 PID: 2661 at fs/sysfs/group.c:281
 sysfs_remove_group+0x76/0x80
[  414.382550] CPU: 9 PID: 2661 Comm: bash Not tainted 5.8.0-rc6+ #33
[  414.383593] Hardware name: Supermicro X10SRA-F/X10SRA-F, BIOS 2.0a 06/23/2016
[  414.384669] RIP: 0010:sysfs_remove_group+0x76/0x80
[  414.385738] Code: 48 89 df 5b 5d 41 5c e9 d8 b5 ff ff 48 89 df e8 60 b0 ff ff
 eb cb 49 8b 14 24 48 8b 75 00 48 c7 c7 90 ae 13 bb e8 6a 27 d0 ff <0f> 0b 5b 5d
 41 5c c3 0f 1f 00 0f 1f 44 00 00 48 85 f6 74 31 41 54
[  414.388404] RSP: 0018:ffffa22bc080fcb0 EFLAGS: 00010286
[  414.389638] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[  414.390829] RDX: 0000000000000001 RSI: ffff8ee2de3e9510 RDI: ffff8ee2de3e9510
[  414.392064] RBP: ffffffffbaef2ee0 R08: 0000000000000000 R09: 0000000000000000
[  414.393224] R10: 0000000000000000 R11: 000000002b30006c R12: ffff8ee260720008
[  414.394388] R13: ffff8ee25e0a40e8 R14: ffffa22bc080ff08 R15: ffff8ee2c3be5020
[  414.395661] FS:  00007fd2a7171740(0000) GS:ffff8ee2de200000(0000)
 knlGS:0000000000000000
[  414.396825] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  414.398011] CR2: 00007f178ffe5020 CR3: 000000084c5cc003 CR4: 00000000003606e0
[  414.399172] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  414.400352] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  414.401473] Call Trace:
[  414.402685]  device_del+0x89/0x400
[  414.403819]  device_unregister+0x16/0x60
[  414.405024]  hwmon_device_unregister+0x44/0xa0
[  414.406112]  thermal_remove_hwmon_sysfs+0x196/0x200
[  414.407256]  thermal_zone_device_unregister+0x1b5/0x1f0
[  414.408415]  cxgb4_thermal_remove+0x3c/0x4f [cxgb4]
[  414.409668]  remove_one+0x212/0x290 [cxgb4]
[  414.410875]  pci_device_remove+0x36/0xb0
[  414.412004]  device_release_driver_internal+0xe2/0x1c0
[  414.413276]  pci_stop_bus_device+0x64/0x90
[  414.414433]  pci_stop_and_remove_bus_device_locked+0x16/0x30
[  414.415609]  remove_store+0x75/0x90
[  414.416790]  kernfs_fop_write+0x114/0x1b0
[  414.417930]  vfs_write+0xcf/0x210
[  414.419059]  ksys_write+0xa7/0xe0
[  414.420120]  do_syscall_64+0x4c/0xa0
[  414.421278]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  414.422335] RIP: 0033:0x7fd2a686afd0
[  414.423396] Code: Bad RIP value.
[  414.424549] RSP: 002b:00007fffc1446148 EFLAGS: 00000246 ORIG_RAX:
 0000000000000001
[  414.425638] RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fd2a686afd0
[  414.426830] RDX: 0000000000000002 RSI: 00007fd2a7196000 RDI: 0000000000000001
[  414.427927] RBP: 00007fd2a7196000 R08: 000000000000000a R09: 00007fd2a7171740
[  414.428923] R10: 00007fd2a7171740 R11: 0000000000000246 R12: 00007fd2a6b43400
[  414.430082] R13: 0000000000000002 R14: 0000000000000001 R15: 0000000000000000
[  414.431027] irq event stamp: 76300
[  414.435678] ---[ end trace 13865acb4d5ab00f ]---

Fixes: b18719157762 ("cxgb4: Add thermal zone support")
Signed-off-by: Potnuri Bharat Teja <bharat@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c
index e3510e9b21f3c..9a6d65243334a 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_thermal.c
@@ -62,6 +62,7 @@ static struct thermal_zone_device_ops cxgb4_thermal_ops = {
 int cxgb4_thermal_init(struct adapter *adap)
 {
 	struct ch_thermal *ch_thermal = &adap->ch_thermal;
+	char ch_tz_name[THERMAL_NAME_LENGTH];
 	int num_trip = CXGB4_NUM_TRIPS;
 	u32 param, val;
 	int ret;
@@ -82,7 +83,8 @@ int cxgb4_thermal_init(struct adapter *adap)
 		ch_thermal->trip_type = THERMAL_TRIP_CRITICAL;
 	}
 
-	ch_thermal->tzdev = thermal_zone_device_register("cxgb4", num_trip,
+	snprintf(ch_tz_name, sizeof(ch_tz_name), "cxgb4_%s", adap->name);
+	ch_thermal->tzdev = thermal_zone_device_register(ch_tz_name, num_trip,
 							 0, adap,
 							 &cxgb4_thermal_ops,
 							 NULL, 0, 0);
@@ -105,7 +107,9 @@ int cxgb4_thermal_init(struct adapter *adap)
 
 int cxgb4_thermal_remove(struct adapter *adap)
 {
-	if (adap->ch_thermal.tzdev)
+	if (adap->ch_thermal.tzdev) {
 		thermal_zone_device_unregister(adap->ch_thermal.tzdev);
+		adap->ch_thermal.tzdev = NULL;
+	}
 	return 0;
 }
-- 
GitLab


From c2f89219f559502c9292d79f695bab9dcec532d1 Mon Sep 17 00:00:00 2001
From: Grygorii Strashko <grygorii.strashko@ti.com>
Date: Sun, 30 Aug 2020 20:34:32 +0300
Subject: [PATCH 0861/1341] net: ethernet: ti: am65-cpsw: fix rmii 100Mbit link
 mode

In RMII link mode it's required to set bit 15 IFCTL_A in MAC_SL MAC_CONTROL
register to enable support for 100Mbit link speed.

Fixes: 93a76530316a ("net: ethernet: ti: introduce am65x/j721e gigabit eth subsystem driver")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/ti/am65-cpsw-nuss.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/ti/am65-cpsw-nuss.c b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
index cb994f66c3be2..9baf3f3da91e1 100644
--- a/drivers/net/ethernet/ti/am65-cpsw-nuss.c
+++ b/drivers/net/ethernet/ti/am65-cpsw-nuss.c
@@ -174,6 +174,8 @@ void am65_cpsw_nuss_adjust_link(struct net_device *ndev)
 		if (phy->speed == 10 && phy_interface_is_rgmii(phy))
 			/* Can be used with in band mode only */
 			mac_control |= CPSW_SL_CTL_EXT_EN;
+		if (phy->speed == 100 && phy->interface == PHY_INTERFACE_MODE_RMII)
+			mac_control |= CPSW_SL_CTL_IFCTL_A;
 		if (phy->duplex)
 			mac_control |= CPSW_SL_CTL_FULLDUPLEX;
 
-- 
GitLab


From ea403fde7552bd61bad6ea45e3feb99db77cb31e Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Sun, 23 Aug 2020 17:14:53 +0800
Subject: [PATCH 0862/1341] scsi: pm8001: Fix memleak in
 pm8001_exec_internal_task_abort

When pm8001_tag_alloc() fails, task should be freed just like it is done in
the subsequent error paths.

Link: https://lore.kernel.org/r/20200823091453.4782-1-dinghao.liu@zju.edu.cn
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/pm8001/pm8001_sas.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c
index 337e79d6837ff..9889bab7d31c1 100644
--- a/drivers/scsi/pm8001/pm8001_sas.c
+++ b/drivers/scsi/pm8001/pm8001_sas.c
@@ -818,7 +818,7 @@ pm8001_exec_internal_task_abort(struct pm8001_hba_info *pm8001_ha,
 
 		res = pm8001_tag_alloc(pm8001_ha, &ccb_tag);
 		if (res)
-			return res;
+			goto ex_err;
 		ccb = &pm8001_ha->ccb_info[ccb_tag];
 		ccb->device = pm8001_dev;
 		ccb->ccb_tag = ccb_tag;
-- 
GitLab


From 5a5b80f98534416b3b253859897e2ba1dc241e70 Mon Sep 17 00:00:00 2001
From: Javed Hasan <jhasan@marvell.com>
Date: Tue, 25 Aug 2020 02:39:40 -0700
Subject: [PATCH 0863/1341] scsi: libfc: Fix for double free()

Fix for '&fp->skb' double free.

Link:
https://lore.kernel.org/r/20200825093940.19612-1-jhasan@marvell.com
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Javed Hasan <jhasan@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/libfc/fc_disc.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index d8cbc9c0e766b..e67abb184a8a0 100644
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -634,8 +634,6 @@ static void fc_disc_gpn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
 	fc_frame_free(fp);
 out:
 	kref_put(&rdata->kref, fc_rport_destroy);
-	if (!IS_ERR(fp))
-		fc_frame_free(fp);
 }
 
 /**
-- 
GitLab


From 2a87d485c4cb4d1b34be6c278a1c6ce3e15c8b8a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ren=C3=A9=20Rebe?= <rene@exactcode.com>
Date: Thu, 27 Aug 2020 22:27:29 +0200
Subject: [PATCH 0864/1341] scsi: qla2xxx: Fix regression on sparc64
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Commit 98aee70d19a7 ("qla2xxx: Add endianizer to max_payload_size
modifier.") in 2014 broke qla2xxx on sparc64, e.g. as in the Sun Blade 1000
/ 2000. Unbreak by partial revert to fix endianness in nvram firmware
default initialization. Also mark the second frame_payload_size in nvram_t
__le16 to avoid new sparse warnings.

Link: https://lore.kernel.org/r/20200827.222729.1875148247374704975.rene@exactcode.com
Fixes: 98aee70d19a7 ("qla2xxx: Add endianizer to max_payload_size modifier.")
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Acked-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: René Rebe <rene@exactcode.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/qla2xxx/qla_def.h  | 2 +-
 drivers/scsi/qla2xxx/qla_init.c | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 1bc090d8a71b0..a165120d2976f 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -1626,7 +1626,7 @@ typedef struct {
 	 */
 	uint8_t	 firmware_options[2];
 
-	uint16_t frame_payload_size;
+	__le16	frame_payload_size;
 	__le16	max_iocb_allocation;
 	__le16	execution_throttle;
 	uint8_t	 retry_count;
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 57a2d76aa691d..4ff75d9fc1251 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -4603,18 +4603,18 @@ qla2x00_nvram_config(scsi_qla_host_t *vha)
 			nv->firmware_options[1] = BIT_7 | BIT_5;
 			nv->add_firmware_options[0] = BIT_5;
 			nv->add_firmware_options[1] = BIT_5 | BIT_4;
-			nv->frame_payload_size = 2048;
+			nv->frame_payload_size = cpu_to_le16(2048);
 			nv->special_options[1] = BIT_7;
 		} else if (IS_QLA2200(ha)) {
 			nv->firmware_options[0] = BIT_2 | BIT_1;
 			nv->firmware_options[1] = BIT_7 | BIT_5;
 			nv->add_firmware_options[0] = BIT_5;
 			nv->add_firmware_options[1] = BIT_5 | BIT_4;
-			nv->frame_payload_size = 1024;
+			nv->frame_payload_size = cpu_to_le16(1024);
 		} else if (IS_QLA2100(ha)) {
 			nv->firmware_options[0] = BIT_3 | BIT_1;
 			nv->firmware_options[1] = BIT_5;
-			nv->frame_payload_size = 1024;
+			nv->frame_payload_size = cpu_to_le16(1024);
 		}
 
 		nv->max_iocb_allocation = cpu_to_le16(256);
-- 
GitLab


From 7ac836ebcb1509845fe7d66314f469f8e709da93 Mon Sep 17 00:00:00 2001
From: James Smart <james.smart@broadcom.com>
Date: Fri, 28 Aug 2020 10:53:29 -0700
Subject: [PATCH 0865/1341] scsi: lpfc: Fix setting IRQ affinity with an empty
 CPU mask

Some systems are reporting the following log message during driver unload
or system shutdown:

  ics_rtas_set_affinity: No online cpus in the mask

A prior commit introduced the writing of an empty affinity mask in calls to
irq_set_affinity_hint() when disabling interrupts or when there are no
remaining online CPUs to service an eq interrupt. At least some ppc64
systems are checking whether affinity masks are empty or not.

Do not call irq_set_affinity_hint() with an empty CPU mask.

Fixes: dcaa21367938 ("scsi: lpfc: Change default IRQ model on AMD architectures")
Link: https://lore.kernel.org/r/20200828175332.130300-2-james.smart@broadcom.com
Cc: <stable@vger.kernel.org> # v5.5+
Co-developed-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/lpfc/lpfc_init.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index c697259993159..ca25e54bb7824 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -11376,7 +11376,6 @@ lpfc_irq_clear_aff(struct lpfc_hba_eq_hdl *eqhdl)
 {
 	cpumask_clear(&eqhdl->aff_mask);
 	irq_clear_status_flags(eqhdl->irq, IRQ_NO_BALANCING);
-	irq_set_affinity_hint(eqhdl->irq, &eqhdl->aff_mask);
 }
 
 /**
-- 
GitLab


From 7b08e89f98cee9907895fabb64cf437bc505ce9a Mon Sep 17 00:00:00 2001
From: James Smart <james.smart@broadcom.com>
Date: Fri, 28 Aug 2020 10:53:30 -0700
Subject: [PATCH 0866/1341] scsi: lpfc: Fix FLOGI/PLOGI receive race condition
 in pt2pt discovery

The driver is unable to successfully login with remote device. During pt2pt
login, the driver completes its FLOGI request with the remote device having
WWN precedence.  The remote device issues its own (delayed) FLOGI after
accepting the driver's and, upon transmitting the FLOGI, immediately
recognizes it has already processed the driver's FLOGI thus it transitions
to sending a PLOGI before waiting for an ACC to its FLOGI.

In the driver, the FLOGI is received and an ACC sent, followed by the PLOGI
being received and an ACC sent. The issue is that the PLOGI reception
occurs before the response from the adapter from the FLOGI ACC is
received. Processing of the PLOGI sets state flags to perform the REG_RPI
mailbox command and proceed with the rest of discovery on the port. The
same completion routine used by both FLOGI and PLOGI is generic in
nature. One of the things it does is clear flags, and those flags happen to
drive the rest of discovery.  So what happened was the PLOGI processing set
the flags, the FLOGI ACC completion cleared them, thus when the PLOGI ACC
completes it doesn't see the flags and stops.

Fix by modifying the generic completion routine to not clear the rest of
discovery flag (NLP_ACC_REGLOGIN) unless the completion is also associated
with performing a mailbox command as part of its handling.  For things such
as FLOGI ACC, there isn't a subsequent action to perform with the adapter,
thus there is no mailbox cmd ptr. PLOGI ACC though will perform REG_RPI
upon completion, thus there is a mailbox cmd ptr.

Link: https://lore.kernel.org/r/20200828175332.130300-3-james.smart@broadcom.com
Co-developed-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/lpfc/lpfc_els.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index 48dc63f22ccad..abc6200d8881e 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -4656,7 +4656,9 @@ lpfc_cmpl_els_rsp(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 out:
 	if (ndlp && NLP_CHK_NODE_ACT(ndlp) && shost) {
 		spin_lock_irq(shost->host_lock);
-		ndlp->nlp_flag &= ~(NLP_ACC_REGLOGIN | NLP_RM_DFLT_RPI);
+		if (mbox)
+			ndlp->nlp_flag &= ~NLP_ACC_REGLOGIN;
+		ndlp->nlp_flag &= ~NLP_RM_DFLT_RPI;
 		spin_unlock_irq(shost->host_lock);
 
 		/* If the node is not being used by another discovery thread,
-- 
GitLab


From 441f6b5b097d74a8aa72ec0d8992ef820e2b3773 Mon Sep 17 00:00:00 2001
From: James Smart <james.smart@broadcom.com>
Date: Fri, 28 Aug 2020 10:53:31 -0700
Subject: [PATCH 0867/1341] scsi: lpfc: Extend the RDF FPIN Registration
 descriptor for additional events

Currently the driver registers for Link Integrity events only.

This patch adds registration for the following FPIN types:

 - Delivery Notifications
 - Congestion Notification
 - Peer Congestion Notification

Link: https://lore.kernel.org/r/20200828175332.130300-4-james.smart@broadcom.com
Co-developed-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/lpfc/lpfc_els.c | 3 +++
 drivers/scsi/lpfc/lpfc_hw4.h | 2 +-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index abc6200d8881e..f4e274eb6c9c5 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -3517,6 +3517,9 @@ lpfc_issue_els_rdf(struct lpfc_vport *vport, uint8_t retry)
 				FC_TLV_DESC_LENGTH_FROM_SZ(prdf->reg_d1));
 	prdf->reg_d1.reg_desc.count = cpu_to_be32(ELS_RDF_REG_TAG_CNT);
 	prdf->reg_d1.desc_tags[0] = cpu_to_be32(ELS_DTAG_LNK_INTEGRITY);
+	prdf->reg_d1.desc_tags[1] = cpu_to_be32(ELS_DTAG_DELIVERY);
+	prdf->reg_d1.desc_tags[2] = cpu_to_be32(ELS_DTAG_PEER_CONGEST);
+	prdf->reg_d1.desc_tags[3] = cpu_to_be32(ELS_DTAG_CONGESTION);
 
 	lpfc_debugfs_disc_trc(vport, LPFC_DISC_TRC_ELS_CMD,
 			      "Issue RDF:       did:x%x",
diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h
index c4ba8273a63fb..12e4e76233e6a 100644
--- a/drivers/scsi/lpfc/lpfc_hw4.h
+++ b/drivers/scsi/lpfc/lpfc_hw4.h
@@ -4800,7 +4800,7 @@ struct send_frame_wqe {
 	uint32_t fc_hdr_wd5;           /* word 15 */
 };
 
-#define ELS_RDF_REG_TAG_CNT		1
+#define ELS_RDF_REG_TAG_CNT		4
 struct lpfc_els_rdf_reg_desc {
 	struct fc_df_desc_fpin_reg	reg_desc;	/* descriptor header */
 	__be32				desc_tags[ELS_RDF_REG_TAG_CNT];
-- 
GitLab


From bc534069374966e6df0862c2f039e17cb4c2133a Mon Sep 17 00:00:00 2001
From: James Smart <james.smart@broadcom.com>
Date: Fri, 28 Aug 2020 10:53:32 -0700
Subject: [PATCH 0868/1341] scsi: lpfc: Update lpfc version to 12.8.0.4

Update lpfc version to 12.8.0.4

Link: https://lore.kernel.org/r/20200828175332.130300-5-james.smart@broadcom.com
Co-developed-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/lpfc/lpfc_version.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/lpfc/lpfc_version.h b/drivers/scsi/lpfc/lpfc_version.h
index 20adec4387f02..c657abf22b751 100644
--- a/drivers/scsi/lpfc/lpfc_version.h
+++ b/drivers/scsi/lpfc/lpfc_version.h
@@ -20,7 +20,7 @@
  * included with this package.                                     *
  *******************************************************************/
 
-#define LPFC_DRIVER_VERSION "12.8.0.3"
+#define LPFC_DRIVER_VERSION "12.8.0.4"
 #define LPFC_DRIVER_NAME		"lpfc"
 
 /* Used for SLI 2/3 */
-- 
GitLab


From b7429ea53d6c0936a0f10a5d64164f0aea440143 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Mon, 31 Aug 2020 17:06:43 +0800
Subject: [PATCH 0869/1341] HID: elan: Fix memleak in elan_input_configured

When input_mt_init_slots() fails, input should be freed
to prevent memleak. When input_register_device() fails,
we should call input_mt_destroy_slots() to free memory
allocated by input_mt_init_slots().

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---
 drivers/hid/hid-elan.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/hid/hid-elan.c b/drivers/hid/hid-elan.c
index 45c4f888b7c4e..dae193749d443 100644
--- a/drivers/hid/hid-elan.c
+++ b/drivers/hid/hid-elan.c
@@ -188,6 +188,7 @@ static int elan_input_configured(struct hid_device *hdev, struct hid_input *hi)
 	ret = input_mt_init_slots(input, ELAN_MAX_FINGERS, INPUT_MT_POINTER);
 	if (ret) {
 		hid_err(hdev, "Failed to init elan MT slots: %d\n", ret);
+		input_free_device(input);
 		return ret;
 	}
 
@@ -198,6 +199,7 @@ static int elan_input_configured(struct hid_device *hdev, struct hid_input *hi)
 	if (ret) {
 		hid_err(hdev, "Failed to register elan input device: %d\n",
 			ret);
+		input_mt_destroy_slots(input);
 		input_free_device(input);
 		return ret;
 	}
-- 
GitLab


From 45df80d7605c25055a85fbc5a8446c81c6c0ca24 Mon Sep 17 00:00:00 2001
From: Vadym Kochan <vadym.kochan@plvision.eu>
Date: Mon, 31 Aug 2020 04:55:39 +0300
Subject: [PATCH 0870/1341] misc: eeprom: at24: register nvmem only after
 eeprom is ready to use

During nvmem_register() the nvmem core sends notifications when:

    - cell added
    - nvmem added

and during these notifications some callback func may access the nvmem
device, which will fail in case of at24 eeprom because regulator and pm
are enabled after nvmem_register().

Fixes: cd5676db0574 ("misc: eeprom: at24: support pm_runtime control")
Fixes: b20eb4c1f026 ("eeprom: at24: drop unnecessary label")
Cc: stable@vger.kernel.org
Signed-off-by: Vadym Kochan <vadym.kochan@plvision.eu>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/misc/eeprom/at24.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/misc/eeprom/at24.c b/drivers/misc/eeprom/at24.c
index 2591c21b2b5d8..26a23abc053d2 100644
--- a/drivers/misc/eeprom/at24.c
+++ b/drivers/misc/eeprom/at24.c
@@ -692,10 +692,6 @@ static int at24_probe(struct i2c_client *client)
 	nvmem_config.word_size = 1;
 	nvmem_config.size = byte_len;
 
-	at24->nvmem = devm_nvmem_register(dev, &nvmem_config);
-	if (IS_ERR(at24->nvmem))
-		return PTR_ERR(at24->nvmem);
-
 	i2c_set_clientdata(client, at24);
 
 	err = regulator_enable(at24->vcc_reg);
@@ -708,6 +704,13 @@ static int at24_probe(struct i2c_client *client)
 	pm_runtime_set_active(dev);
 	pm_runtime_enable(dev);
 
+	at24->nvmem = devm_nvmem_register(dev, &nvmem_config);
+	if (IS_ERR(at24->nvmem)) {
+		pm_runtime_disable(dev);
+		regulator_disable(at24->vcc_reg);
+		return PTR_ERR(at24->nvmem);
+	}
+
 	/*
 	 * Perform a one-byte test read to verify that the
 	 * chip is functional.
-- 
GitLab


From 6546d28f0ef2ea81f6668fa5477cb99cd5e97b59 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Sun, 23 Aug 2020 16:41:59 -0700
Subject: [PATCH 0871/1341] Documentation: fix dma-buf.rst underline length
 warning

/home/rdunlap/lnx/lnx-59-rc2/Documentation/driver-api/dma-buf.rst:182: WARNING: Title underline too short.
Indefinite DMA Fences
~~~~~~~~~~~~~~~~~~~~

Fixes: 72b6ede73623 ("dma-buf.rst: Document why indefinite fences are a bad idea")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dave Airlie <airlied@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1b22d4c3-4ea5-c633-9e35-71ce65d8dbcc@infradead.org
---
 Documentation/driver-api/dma-buf.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/driver-api/dma-buf.rst b/Documentation/driver-api/dma-buf.rst
index 100bfd2272653..13ea0cc0a3fa2 100644
--- a/Documentation/driver-api/dma-buf.rst
+++ b/Documentation/driver-api/dma-buf.rst
@@ -179,7 +179,7 @@ DMA Fence uABI/Sync File
    :internal:
 
 Indefinite DMA Fences
-~~~~~~~~~~~~~~~~~~~~
+~~~~~~~~~~~~~~~~~~~~~
 
 At various times &dma_fence with an indefinite time until dma_fence_wait()
 finishes have been proposed. Examples include:
-- 
GitLab


From bce1305c0ece3dc549663605e567655dd701752c Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Sat, 29 Aug 2020 12:26:01 +0100
Subject: [PATCH 0872/1341] HID: core: Correctly handle ReportSize being zero

It appears that a ReportSize value of zero is legal, even if a bit
non-sensical. Most of the HID code seems to handle that gracefully,
except when computing the total size in bytes. When fed as input to
memset, this leads to some funky outcomes.

Detect the corner case and correctly compute the size.

Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
---
 drivers/hid/hid-core.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 359616e3efbbb..d2ecc9c452554 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1597,6 +1597,17 @@ static void hid_output_field(const struct hid_device *hid,
 	}
 }
 
+/*
+ * Compute the size of a report.
+ */
+static size_t hid_compute_report_size(struct hid_report *report)
+{
+	if (report->size)
+		return ((report->size - 1) >> 3) + 1;
+
+	return 0;
+}
+
 /*
  * Create a report. 'data' has to be allocated using
  * hid_alloc_report_buf() so that it has proper size.
@@ -1609,7 +1620,7 @@ void hid_output_report(struct hid_report *report, __u8 *data)
 	if (report->id > 0)
 		*data++ = report->id;
 
-	memset(data, 0, ((report->size - 1) >> 3) + 1);
+	memset(data, 0, hid_compute_report_size(report));
 	for (n = 0; n < report->maxfield; n++)
 		hid_output_field(report->device, report->field[n], data);
 }
@@ -1739,7 +1750,7 @@ int hid_report_raw_event(struct hid_device *hid, int type, u8 *data, u32 size,
 		csize--;
 	}
 
-	rsize = ((report->size - 1) >> 3) + 1;
+	rsize = hid_compute_report_size(report);
 
 	if (report_enum->numbered && rsize >= HID_MAX_BUFFER_SIZE)
 		rsize = HID_MAX_BUFFER_SIZE - 1;
-- 
GitLab


From 35556bed836f8dc07ac55f69c8d17dce3e7f0e25 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Tue, 1 Sep 2020 10:52:33 +0100
Subject: [PATCH 0873/1341] HID: core: Sanitize event code and type when
 mapping input

When calling into hid_map_usage(), the passed event code is
blindly stored as is, even if it doesn't fit in the associated bitmap.

This event code can come from a variety of sources, including devices
masquerading as input devices, only a bit more "programmable".

Instead of taking the event code at face value, check that it actually
fits the corresponding bitmap, and if it doesn't:
- spit out a warning so that we know which device is acting up
- NULLify the bitmap pointer so that we catch unexpected uses

Code paths that can make use of untrusted inputs can now check
that the mapping was indeed correct and bail out if not.

Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
---
 drivers/hid/hid-input.c      |  4 ++++
 drivers/hid/hid-multitouch.c |  2 ++
 include/linux/hid.h          | 42 +++++++++++++++++++++++++-----------
 3 files changed, 35 insertions(+), 13 deletions(-)

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index b8eabf206e743..88e19996427e6 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1132,6 +1132,10 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
 	}
 
 mapped:
+	/* Mapping failed, bail out */
+	if (!bit)
+		return;
+
 	if (device->driver->input_mapped &&
 	    device->driver->input_mapped(device, hidinput, field, usage,
 					 &bit, &max) < 0) {
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index 3f94b4954225b..e3152155c4b85 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -856,6 +856,8 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 			code = BTN_0  + ((usage->hid - 1) & HID_USAGE);
 
 		hid_map_usage(hi, usage, bit, max, EV_KEY, code);
+		if (!*bit)
+			return -1;
 		input_set_capability(hi->input, EV_KEY, code);
 		return 1;
 
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 875f71132b142..c7044a14200ea 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -959,34 +959,49 @@ static inline void hid_device_io_stop(struct hid_device *hid) {
  * @max: maximal valid usage->code to consider later (out parameter)
  * @type: input event type (EV_KEY, EV_REL, ...)
  * @c: code which corresponds to this usage and type
+ *
+ * The value pointed to by @bit will be set to NULL if either @type is
+ * an unhandled event type, or if @c is out of range for @type. This
+ * can be used as an error condition.
  */
 static inline void hid_map_usage(struct hid_input *hidinput,
 		struct hid_usage *usage, unsigned long **bit, int *max,
-		__u8 type, __u16 c)
+		__u8 type, unsigned int c)
 {
 	struct input_dev *input = hidinput->input;
-
-	usage->type = type;
-	usage->code = c;
+	unsigned long *bmap = NULL;
+	unsigned int limit = 0;
 
 	switch (type) {
 	case EV_ABS:
-		*bit = input->absbit;
-		*max = ABS_MAX;
+		bmap = input->absbit;
+		limit = ABS_MAX;
 		break;
 	case EV_REL:
-		*bit = input->relbit;
-		*max = REL_MAX;
+		bmap = input->relbit;
+		limit = REL_MAX;
 		break;
 	case EV_KEY:
-		*bit = input->keybit;
-		*max = KEY_MAX;
+		bmap = input->keybit;
+		limit = KEY_MAX;
 		break;
 	case EV_LED:
-		*bit = input->ledbit;
-		*max = LED_MAX;
+		bmap = input->ledbit;
+		limit = LED_MAX;
 		break;
 	}
+
+	if (unlikely(c > limit || !bmap)) {
+		pr_warn_ratelimited("%s: Invalid code %d type %d\n",
+				    input->name, c, type);
+		*bit = NULL;
+		return;
+	}
+
+	usage->type = type;
+	usage->code = c;
+	*max = limit;
+	*bit = bmap;
 }
 
 /**
@@ -1000,7 +1015,8 @@ static inline void hid_map_usage_clear(struct hid_input *hidinput,
 		__u8 type, __u16 c)
 {
 	hid_map_usage(hidinput, usage, bit, max, type, c);
-	clear_bit(c, *bit);
+	if (*bit)
+		clear_bit(usage->code, *bit);
 }
 
 /**
-- 
GitLab


From 4e4bb894467cd2a08fc3116407b13e6bc23a7119 Mon Sep 17 00:00:00 2001
From: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Date: Tue, 1 Sep 2020 12:53:42 +0200
Subject: [PATCH 0874/1341] clang-format: Update with the latest for_each macro
 list

Re-run the shell fragment that generated the original list.

Signed-off-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
---
 .clang-format | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/.clang-format b/.clang-format
index a0a96088c74f4..badfc1ba440af 100644
--- a/.clang-format
+++ b/.clang-format
@@ -111,6 +111,7 @@ ForEachMacros:
   - 'css_for_each_descendant_pre'
   - 'device_for_each_child_node'
   - 'dma_fence_chain_for_each'
+  - 'do_for_each_ftrace_op'
   - 'drm_atomic_crtc_for_each_plane'
   - 'drm_atomic_crtc_state_for_each_plane'
   - 'drm_atomic_crtc_state_for_each_plane_state'
@@ -136,6 +137,7 @@ ForEachMacros:
   - 'for_each_active_dev_scope'
   - 'for_each_active_drhd_unit'
   - 'for_each_active_iommu'
+  - 'for_each_aggr_pgid'
   - 'for_each_available_child_of_node'
   - 'for_each_bio'
   - 'for_each_board_func_rsrc'
@@ -234,6 +236,7 @@ ForEachMacros:
   - 'for_each_node_state'
   - 'for_each_node_with_cpus'
   - 'for_each_node_with_property'
+  - 'for_each_nonreserved_multicast_dest_pgid'
   - 'for_each_of_allnodes'
   - 'for_each_of_allnodes_from'
   - 'for_each_of_cpu_node'
@@ -256,6 +259,7 @@ ForEachMacros:
   - 'for_each_pci_dev'
   - 'for_each_pci_msi_entry'
   - 'for_each_pcm_streams'
+  - 'for_each_physmem_range'
   - 'for_each_populated_zone'
   - 'for_each_possible_cpu'
   - 'for_each_present_cpu'
@@ -265,6 +269,8 @@ ForEachMacros:
   - 'for_each_process_thread'
   - 'for_each_property_of_node'
   - 'for_each_registered_fb'
+  - 'for_each_requested_gpio'
+  - 'for_each_requested_gpio_in_range'
   - 'for_each_reserved_mem_region'
   - 'for_each_rtd_codec_dais'
   - 'for_each_rtd_codec_dais_rollback'
@@ -278,12 +284,17 @@ ForEachMacros:
   - 'for_each_sg'
   - 'for_each_sg_dma_page'
   - 'for_each_sg_page'
+  - 'for_each_sgtable_dma_page'
+  - 'for_each_sgtable_dma_sg'
+  - 'for_each_sgtable_page'
+  - 'for_each_sgtable_sg'
   - 'for_each_sibling_event'
   - 'for_each_subelement'
   - 'for_each_subelement_extid'
   - 'for_each_subelement_id'
   - '__for_each_thread'
   - 'for_each_thread'
+  - 'for_each_unicast_dest_pgid'
   - 'for_each_wakeup_source'
   - 'for_each_zone'
   - 'for_each_zone_zonelist'
@@ -464,6 +475,7 @@ ForEachMacros:
   - 'v4l2_m2m_for_each_src_buf'
   - 'v4l2_m2m_for_each_src_buf_safe'
   - 'virtio_device_for_each_vq'
+  - 'while_for_each_ftrace_op'
   - 'xa_for_each'
   - 'xa_for_each_marked'
   - 'xa_for_each_range'
-- 
GitLab


From a231995700c392c0807da95deea231b23fc51a3c Mon Sep 17 00:00:00 2001
From: Tiezhu Yang <yangtiezhu@loongson.cn>
Date: Thu, 27 Aug 2020 16:03:08 +0800
Subject: [PATCH 0875/1341] MIPS: perf: Fix wrong check condition of Loongson
 event IDs

According to the user's manual chapter 8.2.1 of Loongson 3A2000 CPU [1]
and 3A3000 CPU [2], we should take some event IDs such as 274, 358, 359
and 360 as valid in the check condition, otherwise they are recognized
as "not supported", fix it.

[1] http://www.loongson.cn/uploadfile/cpu/3A2000/Loongson3A2000_user2.pdf
[2] http://www.loongson.cn/uploadfile/cpu/3A3000/Loongson3A3000_3B3000user2.pdf

Fixes: e9dfbaaeef1c ("MIPS: perf: Add hardware perf events support for new Loongson-3")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-by: Huang Pei <huangpei@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/kernel/perf_event_mipsxx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c
index efce5defcc5cf..011eb6bbf81a5 100644
--- a/arch/mips/kernel/perf_event_mipsxx.c
+++ b/arch/mips/kernel/perf_event_mipsxx.c
@@ -1898,8 +1898,8 @@ static const struct mips_perf_event *mipsxx_pmu_map_raw_event(u64 config)
 				(base_id >= 64 && base_id < 90) ||
 				(base_id >= 128 && base_id < 164) ||
 				(base_id >= 192 && base_id < 200) ||
-				(base_id >= 256 && base_id < 274) ||
-				(base_id >= 320 && base_id < 358) ||
+				(base_id >= 256 && base_id < 275) ||
+				(base_id >= 320 && base_id < 361) ||
 				(base_id >= 384 && base_id < 574))
 				break;
 
-- 
GitLab


From 811c5494436789e7149487c06e0602b507ce274b Mon Sep 17 00:00:00 2001
From: Sylwester Nawrocki <s.nawrocki@samsung.com>
Date: Thu, 27 Aug 2020 19:33:56 +0200
Subject: [PATCH 0876/1341] ASoC: wm8994: Skip setting of the WM8994_MICBIAS
 register for WM1811

The WM8994_MICBIAS register is not available in the WM1811 CODEC so skip
initialization of that register for that device.
This suppresses an error during boot:
"wm8994-codec: ASoC: error at snd_soc_component_update_bits on wm8994-codec"

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200827173357.31891-1-s.nawrocki@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/wm8994.c  | 2 ++
 sound/soc/codecs/wm_hubs.c | 3 +++
 sound/soc/codecs/wm_hubs.h | 1 +
 3 files changed, 6 insertions(+)

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index 038be667c1a61..b3ba0536736e2 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -4193,11 +4193,13 @@ static int wm8994_component_probe(struct snd_soc_component *component)
 			wm8994->hubs.dcs_readback_mode = 2;
 			break;
 		}
+		wm8994->hubs.micd_scthr = true;
 		break;
 
 	case WM8958:
 		wm8994->hubs.dcs_readback_mode = 1;
 		wm8994->hubs.hp_startup_mode = 1;
+		wm8994->hubs.micd_scthr = true;
 
 		switch (control->revision) {
 		case 0:
diff --git a/sound/soc/codecs/wm_hubs.c b/sound/soc/codecs/wm_hubs.c
index 891effe220fec..0c881846f485f 100644
--- a/sound/soc/codecs/wm_hubs.c
+++ b/sound/soc/codecs/wm_hubs.c
@@ -1223,6 +1223,9 @@ int wm_hubs_handle_analogue_pdata(struct snd_soc_component *component,
 		snd_soc_component_update_bits(component, WM8993_ADDITIONAL_CONTROL,
 				    WM8993_LINEOUT2_FB, WM8993_LINEOUT2_FB);
 
+	if (!hubs->micd_scthr)
+		return 0;
+
 	snd_soc_component_update_bits(component, WM8993_MICBIAS,
 			    WM8993_JD_SCTHR_MASK | WM8993_JD_THR_MASK |
 			    WM8993_MICB1_LVL | WM8993_MICB2_LVL,
diff --git a/sound/soc/codecs/wm_hubs.h b/sound/soc/codecs/wm_hubs.h
index 4b8e5f0d6e32d..988b29e630607 100644
--- a/sound/soc/codecs/wm_hubs.h
+++ b/sound/soc/codecs/wm_hubs.h
@@ -27,6 +27,7 @@ struct wm_hubs_data {
 	int hp_startup_mode;
 	int series_startup;
 	int no_series_update;
+	bool micd_scthr;
 
 	bool no_cache_dac_hp_direct;
 	struct list_head dcs_cache;
-- 
GitLab


From f5a2cda4f1db89776b64c4f0f2c2ac609527ac70 Mon Sep 17 00:00:00 2001
From: Sylwester Nawrocki <s.nawrocki@samsung.com>
Date: Thu, 27 Aug 2020 19:33:57 +0200
Subject: [PATCH 0877/1341] ASoC: wm8994: Ensure the device is resumed in
 wm89xx_mic_detect functions

When the wm8958_mic_detect, wm8994_mic_detect functions get called from
the machine driver, e.g. from the card's late_probe() callback, the CODEC
device may be PM runtime suspended and any regmap writes have no effect.
Add PM runtime calls to these functions to ensure the device registers
are updated as expected.
This suppresses an error during boot
"wm8994-codec: ASoC: error at snd_soc_component_update_bits on wm8994-codec"
caused by the regmap access error due to the cache_only flag being set.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20200827173357.31891-2-s.nawrocki@samsung.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/wm8994.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/sound/soc/codecs/wm8994.c b/sound/soc/codecs/wm8994.c
index b3ba0536736e2..fc9ea198ac799 100644
--- a/sound/soc/codecs/wm8994.c
+++ b/sound/soc/codecs/wm8994.c
@@ -3514,6 +3514,8 @@ int wm8994_mic_detect(struct snd_soc_component *component, struct snd_soc_jack *
 		return -EINVAL;
 	}
 
+	pm_runtime_get_sync(component->dev);
+
 	switch (micbias) {
 	case 1:
 		micdet = &wm8994->micdet[0];
@@ -3561,6 +3563,8 @@ int wm8994_mic_detect(struct snd_soc_component *component, struct snd_soc_jack *
 
 	snd_soc_dapm_sync(dapm);
 
+	pm_runtime_put(component->dev);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(wm8994_mic_detect);
@@ -3932,6 +3936,8 @@ int wm8958_mic_detect(struct snd_soc_component *component, struct snd_soc_jack *
 		return -EINVAL;
 	}
 
+	pm_runtime_get_sync(component->dev);
+
 	if (jack) {
 		snd_soc_dapm_force_enable_pin(dapm, "CLK_SYS");
 		snd_soc_dapm_sync(dapm);
@@ -4000,6 +4006,8 @@ int wm8958_mic_detect(struct snd_soc_component *component, struct snd_soc_jack *
 		snd_soc_dapm_sync(dapm);
 	}
 
+	pm_runtime_put(component->dev);
+
 	return 0;
 }
 EXPORT_SYMBOL_GPL(wm8958_mic_detect);
-- 
GitLab


From 0a7416f94707c60b9f66b01c0a505b7e41375f3a Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@gmail.com>
Date: Mon, 31 Aug 2020 23:43:35 +0300
Subject: [PATCH 0878/1341] regulator: core: Fix slab-out-of-bounds in
 regulator_unlock_recursive()

The recent commit 7d8196641ee1 ("regulator: Remove pointer table
overallocation") changed the size of coupled_rdevs and now KASAN is able
to detect slab-out-of-bounds problem in regulator_unlock_recursive(),
which is a legit problem caused by a typo in the code. The recursive
unlock function uses n_coupled value of a parent regulator for unlocking
supply regulator, while supply's n_coupled should be used. In practice
problem may only affect platforms that use coupled regulators.

Cc: stable@vger.kernel.org # 5.0+
Fixes: f8702f9e4aa7 ("regulator: core: Use ww_mutex for regulators locking")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20200831204335.19489-1-digetx@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/core.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 6789d1efdf5d1..0e764596b0c08 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -236,8 +236,8 @@ static bool regulator_supply_is_couple(struct regulator_dev *rdev)
 static void regulator_unlock_recursive(struct regulator_dev *rdev,
 				       unsigned int n_coupled)
 {
-	struct regulator_dev *c_rdev;
-	int i;
+	struct regulator_dev *c_rdev, *supply_rdev;
+	int i, supply_n_coupled;
 
 	for (i = n_coupled; i > 0; i--) {
 		c_rdev = rdev->coupling_desc.coupled_rdevs[i - 1];
@@ -245,10 +245,13 @@ static void regulator_unlock_recursive(struct regulator_dev *rdev,
 		if (!c_rdev)
 			continue;
 
-		if (c_rdev->supply && !regulator_supply_is_couple(c_rdev))
-			regulator_unlock_recursive(
-					c_rdev->supply->rdev,
-					c_rdev->coupling_desc.n_coupled);
+		if (c_rdev->supply && !regulator_supply_is_couple(c_rdev)) {
+			supply_rdev = c_rdev->supply->rdev;
+			supply_n_coupled = supply_rdev->coupling_desc.n_coupled;
+
+			regulator_unlock_recursive(supply_rdev,
+						   supply_n_coupled);
+		}
 
 		regulator_unlock(c_rdev);
 	}
-- 
GitLab


From fc1f178cdb31783ff37296ecae817a1045a1a513 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <mpe@ellerman.id.au>
Date: Tue, 1 Sep 2020 22:45:17 +1000
Subject: [PATCH 0879/1341] selftests/powerpc: Skip PROT_SAO test in
 guests/LPARS

In commit 9b725a90a8f1 ("powerpc/64s: Disallow PROT_SAO in LPARs by
default") PROT_SAO was disabled in guests/LPARs by default. So skip
the test if we are running in a guest to avoid a spurious failure.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200901124653.523182-1-mpe@ellerman.id.au
---
 tools/testing/selftests/powerpc/mm/prot_sao.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/powerpc/mm/prot_sao.c b/tools/testing/selftests/powerpc/mm/prot_sao.c
index e0cf8ebbf8cd5..30b71b1d78d57 100644
--- a/tools/testing/selftests/powerpc/mm/prot_sao.c
+++ b/tools/testing/selftests/powerpc/mm/prot_sao.c
@@ -7,6 +7,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/mman.h>
+#include <unistd.h>
 
 #include <asm/cputable.h>
 
@@ -18,9 +19,13 @@ int test_prot_sao(void)
 {
 	char *p;
 
-	/* SAO was introduced in 2.06 and removed in 3.1 */
+	/*
+	 * SAO was introduced in 2.06 and removed in 3.1. It's disabled in
+	 * guests/LPARs by default, so also skip if we are running in a guest.
+	 */
 	SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06) ||
-		have_hwcap2(PPC_FEATURE2_ARCH_3_1));
+		have_hwcap2(PPC_FEATURE2_ARCH_3_1) ||
+		access("/proc/device-tree/rtas/ibm,hypertas-functions", F_OK) == 0);
 
 	/*
 	 * Ensure we can ask for PROT_SAO.
-- 
GitLab


From 949a1ebe8cea7b342085cb6a4946b498306b9493 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Tue, 1 Sep 2020 15:18:02 +0200
Subject: [PATCH 0880/1341] ALSA: pcm: oss: Remove superfluous WARN_ON() for
 mulaw sanity check

The PCM OSS mulaw plugin has a check of the format of the counter part
whether it's a linear format.  The check is with snd_BUG_ON() that
emits WARN_ON() when the debug config is set, and it confuses
syzkaller as if it were a serious issue.  Let's drop snd_BUG_ON() for
avoiding that.

While we're at it, correct the error code to a more suitable, EINVAL.

Reported-by: syzbot+23b22dc2e0b81cbfcc95@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200901131802.18157-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/core/oss/mulaw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sound/core/oss/mulaw.c b/sound/core/oss/mulaw.c
index 3788906421a73..fe27034f28460 100644
--- a/sound/core/oss/mulaw.c
+++ b/sound/core/oss/mulaw.c
@@ -329,8 +329,8 @@ int snd_pcm_plugin_build_mulaw(struct snd_pcm_substream *plug,
 		snd_BUG();
 		return -EINVAL;
 	}
-	if (snd_BUG_ON(!snd_pcm_format_linear(format->format)))
-		return -ENXIO;
+	if (!snd_pcm_format_linear(format->format))
+		return -EINVAL;
 
 	err = snd_pcm_plugin_build(plug, "Mu-Law<->linear conversion",
 				   src_format, dst_format,
-- 
GitLab


From de1b0ee490eafdf65fac9eef9925391a8369f2dc Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Mon, 31 Aug 2020 11:20:02 -0600
Subject: [PATCH 0881/1341] block: ensure bdi->io_pages is always initialized

If a driver leaves the limit settings as the defaults, then we don't
initialize bdi->io_pages. This means that file systems may need to
work around bdi->io_pages == 0, which is somewhat messy.

Initialize the default value just like we do for ->ra_pages.

Cc: stable@vger.kernel.org
Fixes: 9491ae4aade6 ("mm: don't cap request size based on read-ahead setting")
Reported-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/block/blk-core.c b/block/blk-core.c
index d9d632639bd18..10c08ac506978 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -539,6 +539,7 @@ struct request_queue *blk_alloc_queue(int node_id)
 		goto fail_stats;
 
 	q->backing_dev_info->ra_pages = VM_READAHEAD_PAGES;
+	q->backing_dev_info->io_pages = VM_READAHEAD_PAGES;
 	q->backing_dev_info->capabilities = BDI_CAP_CGROUP_WRITEBACK;
 	q->node = node_id;
 
-- 
GitLab


From 98dfd5024a2e9e170b85c07078e2d89f20a5dfbd Mon Sep 17 00:00:00 2001
From: Jiufei Xue <jiufei.xue@linux.alibaba.com>
Date: Tue, 1 Sep 2020 13:35:02 +0800
Subject: [PATCH 0882/1341] io_uring: fix removing the wrong file in
 __io_sqe_files_update()

Index here is already the position of the file in fixed_file_table, we
should not use io_file_from_index() again to get it. Otherwise, the
wrong file which still in use may be released unexpectedly.

Cc: stable@vger.kernel.org # v5.6
Fixes: 05f3fb3c5397 ("io_uring: avoid ring quiesce for fixed file set unregister and update")
Signed-off-by: Jiufei Xue <jiufei.xue@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 852c2eaf1a9ac..a06b562890394 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7324,7 +7324,7 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx,
 		table = &ctx->file_data->table[i >> IORING_FILE_TABLE_SHIFT];
 		index = i & IORING_FILE_TABLE_MASK;
 		if (table->files[index]) {
-			file = io_file_from_index(ctx, index);
+			file = table->files[index];
 			err = io_queue_file_removal(data, file);
 			if (err)
 				break;
-- 
GitLab


From a139ffa40f0c24b753838b8ef3dcf6ad10eb7854 Mon Sep 17 00:00:00 2001
From: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Date: Tue, 1 Sep 2020 11:32:18 +0200
Subject: [PATCH 0883/1341] iio: adc: mcp3422: fix locking on error path

Reading from the chip should be unlocked on error path else the lock
could never being released.

Fixes: 07914c84ba30 ("iio: adc: Add driver for Microchip MCP3422/3/4 high resolution ADC")
Fixes: 3f1093d83d71 ("iio: adc: mcp3422: fix locking scope")
Acked-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Link: https://lore.kernel.org/r/20200901093218.1500845-1-angelo.compagnucci@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/iio/adc/mcp3422.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/mcp3422.c b/drivers/iio/adc/mcp3422.c
index 219adac2384b7..da353dcb1e9d4 100644
--- a/drivers/iio/adc/mcp3422.c
+++ b/drivers/iio/adc/mcp3422.c
@@ -143,8 +143,10 @@ static int mcp3422_read_channel(struct mcp3422 *adc,
 		config &= ~MCP3422_PGA_MASK;
 		config |= MCP3422_PGA_VALUE(adc->pga[req_channel]);
 		ret = mcp3422_update_config(adc, config);
-		if (ret < 0)
+		if (ret < 0) {
+			mutex_unlock(&adc->lock);
 			return ret;
+		}
 		msleep(mcp3422_read_times[MCP3422_SAMPLE_RATE(adc->config)]);
 	}
 
-- 
GitLab


From cafe01ef8fcb248583038e1be071383530fe355a Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@redhat.com>
Date: Tue, 1 Sep 2020 18:07:38 +0800
Subject: [PATCH 0884/1341] block: release disk reference in
 hd_struct_free_work

Commit e8c7d14ac6c3 ("block: revert back to synchronous request_queue removal")
stops to release request queue from wq context because that commit
supposed all blk_put_queue() is called in context which is allowed
to sleep. However, this assumption isn't true because we release disk's
reference in partition's percpu_ref's ->release() which doesn't allow
to sleep, because the ->release() is run via call_rcu().

Fixes this issue by moving put disk reference into hd_struct_free_work()

Fixes: e8c7d14ac6c3 ("block: revert back to synchronous request_queue removal")
Reported-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Tested-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Luis Chamberlain <mcgrof@kernel.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/partitions/core.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/block/partitions/core.c b/block/partitions/core.c
index e62a98a8eeb75..5a18c8edabbc5 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -278,6 +278,15 @@ static void hd_struct_free_work(struct work_struct *work)
 {
 	struct hd_struct *part =
 		container_of(to_rcu_work(work), struct hd_struct, rcu_work);
+	struct gendisk *disk = part_to_disk(part);
+
+	/*
+	 * Release the disk reference acquired in delete_partition here.
+	 * We can't release it in hd_struct_free because the final put_device
+	 * needs process context and thus can't be run directly from a
+	 * percpu_ref ->release handler.
+	 */
+	put_device(disk_to_dev(disk));
 
 	part->start_sect = 0;
 	part->nr_sects = 0;
@@ -293,7 +302,6 @@ static void hd_struct_free(struct percpu_ref *ref)
 		rcu_dereference_protected(disk->part_tbl, 1);
 
 	rcu_assign_pointer(ptbl->last_lookup, NULL);
-	put_device(disk_to_dev(disk));
 
 	INIT_RCU_WORK(&part->rcu_work, hd_struct_free_work);
 	queue_rcu_work(system_wq, &part->rcu_work);
-- 
GitLab


From 08fc1ab6d748ab1a690fd483f41e2938984ce353 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 1 Sep 2020 11:59:41 +0200
Subject: [PATCH 0885/1341] block: fix locking in bdev_del_partition

We need to hold the whole device bd_mutex to protect against
other thread concurrently deleting out partition before we get
to it, and thus causing a use after free.

Fixes: cddae808aeb7 ("block: pass a hd_struct to delete_partition")
Reported-by: syzbot+6448f3c229bc52b82f69@syzkaller.appspotmail.com
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/partitions/core.c | 27 +++++++++++++--------------
 1 file changed, 13 insertions(+), 14 deletions(-)

diff --git a/block/partitions/core.c b/block/partitions/core.c
index 5a18c8edabbc5..5b4869c08fb38 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -532,19 +532,20 @@ int bdev_add_partition(struct block_device *bdev, int partno,
 int bdev_del_partition(struct block_device *bdev, int partno)
 {
 	struct block_device *bdevp;
-	struct hd_struct *part;
-	int ret = 0;
-
-	part = disk_get_part(bdev->bd_disk, partno);
-	if (!part)
-		return -ENXIO;
+	struct hd_struct *part = NULL;
+	int ret;
 
-	ret = -ENOMEM;
-	bdevp = bdget(part_devt(part));
+	bdevp = bdget_disk(bdev->bd_disk, partno);
 	if (!bdevp)
-		goto out_put_part;
+		return -ENOMEM;
 
 	mutex_lock(&bdevp->bd_mutex);
+	mutex_lock_nested(&bdev->bd_mutex, 1);
+
+	ret = -ENXIO;
+	part = disk_get_part(bdev->bd_disk, partno);
+	if (!part)
+		goto out_unlock;
 
 	ret = -EBUSY;
 	if (bdevp->bd_openers)
@@ -553,16 +554,14 @@ int bdev_del_partition(struct block_device *bdev, int partno)
 	sync_blockdev(bdevp);
 	invalidate_bdev(bdevp);
 
-	mutex_lock_nested(&bdev->bd_mutex, 1);
 	delete_partition(bdev->bd_disk, part);
-	mutex_unlock(&bdev->bd_mutex);
-
 	ret = 0;
 out_unlock:
+	mutex_unlock(&bdev->bd_mutex);
 	mutex_unlock(&bdevp->bd_mutex);
 	bdput(bdevp);
-out_put_part:
-	disk_put_part(part);
+	if (part)
+		disk_put_part(part);
 	return ret;
 }
 
-- 
GitLab


From 2569231d71dff82cfd6e82ab3871776f72ec53b6 Mon Sep 17 00:00:00 2001
From: Camel Guo <camelg@axis.com>
Date: Tue, 1 Sep 2020 15:57:35 +0200
Subject: [PATCH 0886/1341] ASoC: tlv320adcx140: Fix accessing uninitialized
 adcx140->dev

In adcx140_i2c_probe, adcx140->dev is accessed before its
initialization. This commit fixes this bug.

Fixes: 689c7655b50c ("ASoC: tlv320adcx140: Add the tlv320adcx140 codec driver family")
Acked-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Camel Guo <camel.guo@axis.com>
Link: https://lore.kernel.org/r/20200901135736.32036-1-camel.guo@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/tlv320adcx140.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/tlv320adcx140.c b/sound/soc/codecs/tlv320adcx140.c
index 5cd50d8411778..7ae6ec374be36 100644
--- a/sound/soc/codecs/tlv320adcx140.c
+++ b/sound/soc/codecs/tlv320adcx140.c
@@ -980,6 +980,8 @@ static int adcx140_i2c_probe(struct i2c_client *i2c,
 	if (!adcx140)
 		return -ENOMEM;
 
+	adcx140->dev = &i2c->dev;
+
 	adcx140->gpio_reset = devm_gpiod_get_optional(adcx140->dev,
 						      "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(adcx140->gpio_reset))
@@ -1007,7 +1009,7 @@ static int adcx140_i2c_probe(struct i2c_client *i2c,
 			ret);
 		return ret;
 	}
-	adcx140->dev = &i2c->dev;
+
 	i2c_set_clientdata(i2c, adcx140);
 
 	return devm_snd_soc_register_component(&i2c->dev,
-- 
GitLab


From 20befbb1080307e70c7893ef9840d32e3ef8ac45 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 20 Aug 2020 22:25:01 +0100
Subject: [PATCH 0887/1341] perf tools: Use %zd for size_t printf formats on
 32-bit

A couple of trivial fixes for using %zd for size_t in the code
supporting the ZSTD compression library.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200820212501.24421-1-chris@chris-wilson.co.uk
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/session.c | 2 +-
 tools/perf/util/zstd.c    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index ffbc9d35a383f..7a5f03764702b 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -87,7 +87,7 @@ static int perf_session__process_compressed_event(struct perf_session *session,
 		session->decomp_last = decomp;
 	}
 
-	pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size);
+	pr_debug("decomp (B): %zd to %zd\n", src_size, decomp_size);
 
 	return 0;
 }
diff --git a/tools/perf/util/zstd.c b/tools/perf/util/zstd.c
index d2202392ffdbb..48dd2b018c47a 100644
--- a/tools/perf/util/zstd.c
+++ b/tools/perf/util/zstd.c
@@ -99,7 +99,7 @@ size_t zstd_decompress_stream(struct zstd_data *data, void *src, size_t src_size
 	while (input.pos < input.size) {
 		ret = ZSTD_decompressStream(data->dstream, &output, &input);
 		if (ZSTD_isError(ret)) {
-			pr_err("failed to decompress (B): %ld -> %ld, dst_size %ld : %s\n",
+			pr_err("failed to decompress (B): %zd -> %zd, dst_size %zd : %s\n",
 			       src_size, output.size, dst_size, ZSTD_getErrorName(ret));
 			break;
 		}
-- 
GitLab


From a060c1f12b525ba828f871eff3127dabf8daa1e6 Mon Sep 17 00:00:00 2001
From: Wei Li <liwei391@huawei.com>
Date: Wed, 19 Aug 2020 11:19:47 +0800
Subject: [PATCH 0888/1341] perf record: Correct the help info of option
 "--no-bpf-event"

The help info of option "--no-bpf-event" is wrongly described as "record
bpf events", correct it.

Committer testing:

  $ perf record -h bpf

   Usage: perf record [<options>] [<command>]
      or: perf record [<options>] -- <command> [<options>]

          --clang-opt <clang options>
                            options passed to clang when compiling BPF scriptlets
          --clang-path <clang path>
                            clang binary to use for compiling BPF scriptlets
          --no-bpf-event    do not record bpf events

  $

Fixes: 71184c6ab7e6 ("perf record: Replace option --bpf-event with --no-bpf-event")
Signed-off-by: Wei Li <liwei391@huawei.com>
Acked-by: Song Liu <songliubraving@fb.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Li Bin <huawei.libin@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/lkml/20200819031947.12115-1-liwei391@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-record.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index f91352f847c08..772f1057647ff 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -2452,7 +2452,7 @@ static struct option __record_options[] = {
 	OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize,
 		    "synthesize non-sample events at the end of output"),
 	OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"),
-	OPT_BOOLEAN(0, "no-bpf-event", &record.opts.no_bpf_event, "record bpf events"),
+	OPT_BOOLEAN(0, "no-bpf-event", &record.opts.no_bpf_event, "do not record bpf events"),
 	OPT_BOOLEAN(0, "strict-freq", &record.opts.strict_freq,
 		    "Fail if the specified frequency can't be used"),
 	OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'",
-- 
GitLab


From 943b69ac1884d8e0260ee653e696456810d7c6e3 Mon Sep 17 00:00:00 2001
From: Jin Yao <yao.jin@linux.intel.com>
Date: Fri, 14 Aug 2020 09:21:20 +0800
Subject: [PATCH 0889/1341] perf parse-events: Set exclude_guest=1 for
 user-space counting

Currently if we run 'perf record -e cycles:u', exclude_guest=0.

But it doesn't make sense in most cases that we request for
user-space counting but we also get the guest report.

Of course, we also need to consider 'perf kvm' usage case that
authorized perf users on the host may only want to count guest user
space events. For example,

  # perf kvm --guest record -e cycles:u

When we have 'exclude_guest=1' for 'perf kvm' usage, we may get nothing
from guest events.

To keep perf semantics consistent and clear, this patch sets
exclude_guest=1 for user-space counting but except for 'perf kvm' usage.

Before:

  perf record -e cycles:u ./div
  perf evlist -v
  cycles:u: ..., exclude_kernel: 1, exclude_hv: 1, ...

After:
  perf record -e cycles:u ./div
  perf evlist -v
  cycles:u: ..., exclude_kernel: 1, exclude_hv: 1,  exclude_guest: 1, ...

Before:
  perf kvm --guest record -e cycles:u -vvv

perf_event_attr:

  size                             120
  { sample_period, sample_freq }   4000
  sample_type                      IP|TID|TIME|ID|CPU|PERIOD
  read_format                      ID
  disabled                         1
  inherit                          1
  exclude_kernel                   1
  exclude_hv                       1
  freq                             1
  sample_id_all                    1

After:

  perf kvm --guest record -e cycles:u -vvv

perf_event_attr:
  size                             120
  { sample_period, sample_freq }   4000
  sample_type                      IP|TID|TIME|ID|CPU|PERIOD
  read_format                      ID
  disabled                         1
  inherit                          1
  exclude_kernel                   1
  exclude_hv                       1
  freq                             1
  sample_id_all                    1

For Before/After, exclude_guest are both 0 for perf kvm usage.

perf test 6

 6: Parse event definition strings             : Ok

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Like Xu <like.xu@linux.intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200814012120.16647-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/parse-events.c | 4 ++--
 tools/perf/util/parse-events.c  | 3 +++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index 7f9f87a470c3b..aae0fd9045c1c 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -719,7 +719,7 @@ static int test__group2(struct evlist *evlist)
 	TEST_ASSERT_VAL("wrong exclude_user", !evsel->core.attr.exclude_user);
 	TEST_ASSERT_VAL("wrong exclude_kernel", !evsel->core.attr.exclude_kernel);
 	TEST_ASSERT_VAL("wrong exclude_hv", evsel->core.attr.exclude_hv);
-	TEST_ASSERT_VAL("wrong exclude guest", !evsel->core.attr.exclude_guest);
+	TEST_ASSERT_VAL("wrong exclude guest", evsel->core.attr.exclude_guest);
 	TEST_ASSERT_VAL("wrong exclude host", !evsel->core.attr.exclude_host);
 	TEST_ASSERT_VAL("wrong precise_ip", !evsel->core.attr.precise_ip);
 	TEST_ASSERT_VAL("wrong leader", evsel__is_group_leader(evsel));
@@ -842,7 +842,7 @@ static int test__group3(struct evlist *evlist __maybe_unused)
 	TEST_ASSERT_VAL("wrong exclude_user", !evsel->core.attr.exclude_user);
 	TEST_ASSERT_VAL("wrong exclude_kernel", evsel->core.attr.exclude_kernel);
 	TEST_ASSERT_VAL("wrong exclude_hv", evsel->core.attr.exclude_hv);
-	TEST_ASSERT_VAL("wrong exclude guest", !evsel->core.attr.exclude_guest);
+	TEST_ASSERT_VAL("wrong exclude guest", evsel->core.attr.exclude_guest);
 	TEST_ASSERT_VAL("wrong exclude host", !evsel->core.attr.exclude_host);
 	TEST_ASSERT_VAL("wrong precise_ip", !evsel->core.attr.precise_ip);
 	TEST_ASSERT_VAL("wrong leader", evsel__is_group_leader(evsel));
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 9f7260e691134..ff4c23d2a0f31 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -37,6 +37,7 @@
 #include "util/evsel_config.h"
 #include "util/event.h"
 #include "util/pfm.h"
+#include "perf.h"
 
 #define MAX_NAME_LEN 100
 
@@ -1794,6 +1795,8 @@ static int get_event_modifier(struct event_modifier *mod, char *str,
 		if (*str == 'u') {
 			if (!exclude)
 				exclude = eu = ek = eh = 1;
+			if (!exclude_GH && !perf_guest)
+				eG = 1;
 			eu = 0;
 		} else if (*str == 'k') {
 			if (!exclude)
-- 
GitLab


From 492d4d876c293e64266222ecec0573103dfc2625 Mon Sep 17 00:00:00 2001
From: Thomas Richter <tmricht@linux.ibm.com>
Date: Tue, 25 Aug 2020 09:12:11 +0200
Subject: [PATCH 0890/1341] perf test: Set NULL sentinel in pmu_events table in
 "Parse and process metrics" test

Linux 5.9 introduced perf test case "Parse and process metrics" and
on s390 this test case always dumps core:

  [root@t35lp67 perf]# ./perf test -vvvv -F 67
  67: Parse and process metrics                             :
  --- start ---
  metric expr inst_retired.any / cpu_clk_unhalted.thread for IPC
  parsing metric: inst_retired.any / cpu_clk_unhalted.thread
  Segmentation fault (core dumped)
  [root@t35lp67 perf]#

I debugged this core dump and gdb shows this call chain:

  (gdb) where
   #0  0x000003ffabc3192a in __strnlen_c_1 () from /lib64/libc.so.6
   #1  0x000003ffabc293de in strcasestr () from /lib64/libc.so.6
   #2  0x0000000001102ba2 in match_metric(list=0x1e6ea20 "inst_retired.any",
            n=<optimized out>)
       at util/metricgroup.c:368
   #3  find_metric (map=<optimized out>, map=<optimized out>,
           metric=0x1e6ea20 "inst_retired.any")
      at util/metricgroup.c:765
   #4  __resolve_metric (ids=0x0, map=<optimized out>, metric_list=0x0,
           metric_no_group=<optimized out>, m=<optimized out>)
      at util/metricgroup.c:844
   #5  resolve_metric (ids=0x0, map=0x0, metric_list=0x0,
          metric_no_group=<optimized out>)
      at util/metricgroup.c:881
   #6  metricgroup__add_metric (metric=<optimized out>,
        metric_no_group=metric_no_group@entry=false, events=<optimized out>,
        events@entry=0x3ffd84fb878, metric_list=0x0,
        metric_list@entry=0x3ffd84fb868, map=0x0)
      at util/metricgroup.c:943
   #7  0x00000000011034ae in metricgroup__add_metric_list (map=0x13f9828 <map>,
        metric_list=0x3ffd84fb868, events=0x3ffd84fb878,
        metric_no_group=<optimized out>, list=<optimized out>)
      at util/metricgroup.c:988
   #8  parse_groups (perf_evlist=perf_evlist@entry=0x1e70260,
          str=str@entry=0x12f34b2 "IPC", metric_no_group=<optimized out>,
          metric_no_merge=<optimized out>,
          fake_pmu=fake_pmu@entry=0x1462f18 <perf_pmu.fake>,
          metric_events=0x3ffd84fba58, map=0x1)
      at util/metricgroup.c:1040
   #9  0x0000000001103eb2 in metricgroup__parse_groups_test(
  	evlist=evlist@entry=0x1e70260, map=map@entry=0x13f9828 <map>,
  	str=str@entry=0x12f34b2 "IPC",
  	metric_no_group=metric_no_group@entry=false,
  	metric_no_merge=metric_no_merge@entry=false,
  	metric_events=0x3ffd84fba58)
      at util/metricgroup.c:1082
   #10 0x00000000010c84d8 in __compute_metric (ratio2=0x0, name2=0x0,
          ratio1=<synthetic pointer>, name1=0x12f34b2 "IPC",
  	vals=0x3ffd84fbad8, name=0x12f34b2 "IPC")
      at tests/parse-metric.c:159
   #11 compute_metric (ratio=<synthetic pointer>, vals=0x3ffd84fbad8,
  	name=0x12f34b2 "IPC")
      at tests/parse-metric.c:189
   #12 test_ipc () at tests/parse-metric.c:208
.....
..... omitted many more lines

This test case was added with
commit 218ca91df477 ("perf tests: Add parse metric test for frontend metric").

When I compile with make DEBUG=y it works fine and I do not get a core dump.

It turned out that the above listed function call chain worked on a struct
pmu_event array which requires a trailing element with zeroes which was
missing. The marco map_for_each_event() loops over that array tests for members
metric_expr/metric_name/metric_group being non-NULL. Adding this element fixes
the issue.

Output after:

  [root@t35lp46 perf]# ./perf test 67
  67: Parse and process metrics                             : Ok
  [root@t35lp46 perf]#

Committer notes:

As Ian remarks, this is not s390 specific:

<quote Ian>
  This also shows up with address sanitizer on all architectures
  (perhaps change the patch title) and perhaps add a "Fixes: <commit>"
  tag.

  =================================================================
  ==4718==ERROR: AddressSanitizer: global-buffer-overflow on address
  0x55c93b4d59e8 at pc 0x55c93a1541e2 bp 0x7ffd24327c60 sp
  0x7ffd24327c58
  READ of size 8 at 0x55c93b4d59e8 thread T0
      #0 0x55c93a1541e1 in find_metric tools/perf/util/metricgroup.c:764:2
      #1 0x55c93a153e6c in __resolve_metric tools/perf/util/metricgroup.c:844:9
      #2 0x55c93a152f18 in resolve_metric tools/perf/util/metricgroup.c:881:9
      #3 0x55c93a1528db in metricgroup__add_metric
  tools/perf/util/metricgroup.c:943:9
      #4 0x55c93a151996 in metricgroup__add_metric_list
  tools/perf/util/metricgroup.c:988:9
      #5 0x55c93a1511b9 in parse_groups tools/perf/util/metricgroup.c:1040:8
      #6 0x55c93a1513e1 in metricgroup__parse_groups_test
  tools/perf/util/metricgroup.c:1082:9
      #7 0x55c93a0108ae in __compute_metric tools/perf/tests/parse-metric.c:159:8
      #8 0x55c93a010744 in compute_metric tools/perf/tests/parse-metric.c:189:9
      #9 0x55c93a00f5ee in test_ipc tools/perf/tests/parse-metric.c:208:2
      #10 0x55c93a00f1e8 in test__parse_metric
  tools/perf/tests/parse-metric.c:345:2
      #11 0x55c939fd7202 in run_test tools/perf/tests/builtin-test.c:410:9
      #12 0x55c939fd6736 in test_and_print tools/perf/tests/builtin-test.c:440:9
      #13 0x55c939fd58c3 in __cmd_test tools/perf/tests/builtin-test.c:661:4
      #14 0x55c939fd4e02 in cmd_test tools/perf/tests/builtin-test.c:807:9
      #15 0x55c939e4763d in run_builtin tools/perf/perf.c:313:11
      #16 0x55c939e46475 in handle_internal_command tools/perf/perf.c:365:8
      #17 0x55c939e4737e in run_argv tools/perf/perf.c:409:2
      #18 0x55c939e45f7e in main tools/perf/perf.c:539:3

  0x55c93b4d59e8 is located 0 bytes to the right of global variable
  'pme_test' defined in 'tools/perf/tests/parse-metric.c:17:25'
  (0x55c93b4d54a0) of size 1352
  SUMMARY: AddressSanitizer: global-buffer-overflow
  tools/perf/util/metricgroup.c:764:2 in find_metric
  Shadow bytes around the buggy address:
    0x0ab9a7692ae0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x0ab9a7692af0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x0ab9a7692b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x0ab9a7692b10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x0ab9a7692b20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  =>0x0ab9a7692b30: 00 00 00 00 00 00 00 00 00 00 00 00 00[f9]f9 f9
    0x0ab9a7692b40: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
    0x0ab9a7692b50: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
    0x0ab9a7692b60: f9 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 00 00 00 00
    0x0ab9a7692b70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    0x0ab9a7692b80: f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9 f9
  Shadow byte legend (one shadow byte represents 8 application bytes):
    Addressable:           00
    Partially addressable: 01 02 03 04 05 06 07
    Heap left redzone:	   fa
    Freed heap region:	   fd
    Stack left redzone:	   f1
    Stack mid redzone:	   f2
    Stack right redzone:     f3
    Stack after return:	   f5
    Stack use after scope:   f8
    Global redzone:          f9
    Global init order:	   f6
    Poisoned by user:        f7
    Container overflow:	   fc
    Array cookie:            ac
    Intra object redzone:    bb
    ASan internal:           fe
    Left alloca redzone:     ca
    Right alloca redzone:    cb
    Shadow gap:              cc
</quote>

I'm also adding the missing "Fixes" tag and setting just .name to NULL,
as doing it that way is more compact (the compiler will zero out
everything else) and the table iterators look for .name being NULL as
the sentinel marking the end of the table.

Fixes: 0a507af9c681ac2a ("perf tests: Add parse metric test for ipc metric")
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Link: http://lore.kernel.org/lkml/20200825071211.16959-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/parse-metric.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c
index fc0838a7abc22..23db8acc492df 100644
--- a/tools/perf/tests/parse-metric.c
+++ b/tools/perf/tests/parse-metric.c
@@ -70,6 +70,9 @@ static struct pmu_event pme_test[] = {
 {
 	.metric_expr	= "1/m3",
 	.metric_name	= "M3",
+},
+{
+	.name	= NULL,
 }
 };
 
-- 
GitLab


From 313146a844182c4829acd5e1d60246367212088f Mon Sep 17 00:00:00 2001
From: Thomas Richter <tmricht@linux.ibm.com>
Date: Tue, 25 Aug 2020 08:33:04 +0200
Subject: [PATCH 0891/1341] perf stat: Fix out of bounds array access in the
 print_counters() evlist method
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Fix a compile error on F32 and gcc version 10.1 on s390 in file
utils/stat-display.c.  The error does not show up with make DEBUG=y.  In
fact the issue shows up when using both compiler options -O6 and
-D_FORTIFY_SOURCE=2 (which are omitted with DEBUG=Y).

This is the offending call chain:

print_counter_aggr()
  printout(config, -1, 0, ...)  with 2nd parm id set to -1
    aggr_printout(config, x, id --> -1, ...) which leads to this code:
		case AGGR_NONE:
                if (evsel->percore && !config->percore_show_thread) {
                        ....
                } else {
                        fprintf(config->output, "CPU%*d%s",
                                config->csv_output ? 0 : -7,
                                evsel__cpus(evsel)->map[id],
				                        ^^ id is -1 !!!!
                                config->csv_sep);
                }

This is a compiler inlining issue which is detected on s390 but not on
other plattforms.

Output before:

 # make util/stat-display.o
    .....

  util/stat-display.c: In function ‘perf_evlist__print_counters’:
  util/stat-display.c:121:4: error: array subscript -1 is below array
      bounds of ‘int[]’ [-Werror=array-bounds]
  121 |    fprintf(config->output, "CPU%*d%s",
      |    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  122 |     config->csv_output ? 0 : -7,
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  123 |     evsel__cpus(evsel)->map[id],
      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  124 |     config->csv_sep);
      |     ~~~~~~~~~~~~~~~~
  In file included from util/evsel.h:13,
                 from util/evlist.h:13,
                 from util/stat-display.c:9:
  /root/linux/tools/lib/perf/include/internal/cpumap.h:10:7:
  note: while referencing ‘map’
   10 |  int  map[];
      |       ^~~
  cc1: all warnings being treated as errors
  mv: cannot stat 'util/.stat-display.o.tmp': No such file or directory
  make[3]: *** [/root/linux/tools/build/Makefile.build:97: util/stat-display.o]
  Error 1
  make[2]: *** [Makefile.perf:716: util/stat-display.o] Error 2
  make[1]: *** [Makefile.perf:231: sub-make] Error 2
  make: *** [Makefile:110: util/stat-display.o] Error 2
  [root@t35lp46 perf]#

Output after:

  # make util/stat-display.o
    .....
  CC       util/stat-display.o
  [root@t35lp46 perf]#

Committer notes:

Removed the removal of {} enclosing the multiline else block, as pointed
out by Jiri Olsa.

Suggested-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Link: http://lore.kernel.org/lkml/20200825063304.77733-1-tmricht@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/stat-display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index 57d0706e1330a..493ec372fdec4 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -117,7 +117,7 @@ static void aggr_printout(struct perf_stat_config *config,
 				cpu_map__id_to_die(id),
 				config->csv_output ? 0 : -3,
 				cpu_map__id_to_cpu(id), config->csv_sep);
-		} else {
+		} else if (id > -1) {
 			fprintf(config->output, "CPU%*d%s",
 				config->csv_output ? 0 : -7,
 				evsel__cpus(evsel)->map[id],
-- 
GitLab


From 33321a06c70b44dd391b4cc01568a20d53fb3a6e Mon Sep 17 00:00:00 2001
From: Ian Rogers <irogers@google.com>
Date: Tue, 25 Aug 2020 21:29:10 -0700
Subject: [PATCH 0892/1341] perf parse-events: Avoid an uninitialized read when
 using fake PMUs

With a fake_pmu the pmu_info isn't populated by perf_pmu__check_alias.
In this case, don't try to copy the uninitialized values to the evsel.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200826042910.1902374-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/parse-events.c | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index ff4c23d2a0f31..c4d2394e2b2dc 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -1534,19 +1534,23 @@ int parse_events_add_pmu(struct parse_events_state *parse_state,
 	evsel = __add_event(list, &parse_state->idx, &attr, true,
 			    get_config_name(head_config), pmu,
 			    &config_terms, auto_merge_stats, NULL);
-	if (evsel) {
-		evsel->unit = info.unit;
-		evsel->scale = info.scale;
-		evsel->per_pkg = info.per_pkg;
-		evsel->snapshot = info.snapshot;
-		evsel->metric_expr = info.metric_expr;
-		evsel->metric_name = info.metric_name;
-		evsel->pmu_name = name ? strdup(name) : NULL;
-		evsel->use_uncore_alias = use_uncore_alias;
-		evsel->percore = config_term_percore(&evsel->config_terms);
-	}
-
-	return evsel ? 0 : -ENOMEM;
+	if (!evsel)
+		return -ENOMEM;
+
+	evsel->pmu_name = name ? strdup(name) : NULL;
+	evsel->use_uncore_alias = use_uncore_alias;
+	evsel->percore = config_term_percore(&evsel->config_terms);
+
+	if (parse_state->fake_pmu)
+		return 0;
+
+	evsel->unit = info.unit;
+	evsel->scale = info.scale;
+	evsel->per_pkg = info.per_pkg;
+	evsel->snapshot = info.snapshot;
+	evsel->metric_expr = info.metric_expr;
+	evsel->metric_name = info.metric_name;
+	return 0;
 }
 
 int parse_events_multi_pmu_add(struct parse_events_state *parse_state,
-- 
GitLab


From d4ccbacb9c217fefb4332a9af81b785690cf1053 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Mon, 31 Aug 2020 16:17:00 -0300
Subject: [PATCH 0893/1341] perf top/report: Fix infinite loop in the TUI for
 grouped events

For a while we need to have a dummy event for doing things like
receiving PERF_RECORD_COMM, PERF_RECORD_EXEC, etc for threads being
created and dying while we synthesize the pre-existing ones at tool
start.

This 'dummy' event is needed for keeping track of thread lifetime events
early in the session but are uninteresting otherwise, i.e. no need to
have it in a initial events menu for the non-grouped case, i.e. for:

 # perf top -e cycles,instructions

or even for plain:

 # perf top

When 'cycles' and that 'dummy' event are in place.

The code to remove that 'dummy' event ended up creating an endless loop
for the grouped case, i.e.:

 # perf top -e '{cycles,instructions}'

Fix it.

Fixes: bee9ca1c8a237ca1 ("perf report TUI: Remove needless 'dummy' event from menu")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/ui/browsers/hists.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index be9c4c0549bc8..a07626f072087 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -3629,8 +3629,8 @@ int perf_evlist__tui_browse_hists(struct evlist *evlist, const char *help,
 {
 	int nr_entries = evlist->core.nr_entries;
 
-single_entry:
 	if (perf_evlist__single_entry(evlist)) {
+single_entry: {
 		struct evsel *first = evlist__first(evlist);
 
 		return perf_evsel__hists_browse(first, nr_entries, help,
@@ -3638,6 +3638,7 @@ int perf_evlist__tui_browse_hists(struct evlist *evlist, const char *help,
 						env, warn_lost_event,
 						annotation_opts);
 	}
+	}
 
 	if (symbol_conf.event_group) {
 		struct evsel *pos;
-- 
GitLab


From f5f8e7e55fbdb4fdddec73518e23c48083108fbb Mon Sep 17 00:00:00 2001
From: Al Grant <al.grant@arm.com>
Date: Wed, 19 Aug 2020 16:47:50 +0800
Subject: [PATCH 0894/1341] perf cs-etm: Fix corrupt data after perf inject
 from

Commit 42bbabed09ce6208 ("perf tools: Add hw_idx in struct branch_stack")
changed the format of branch stacks in perf samples. When samples use
this new format, a flag must be set in the corresponding event.

Synthesized branch stacks generated from CoreSight ETM trace were using
the new format, but not setting the event attribute, leading to
consumers seeing corrupt data. This patch fixes the issue by setting the
event attribute to indicate use of the new format.

Fixes: 42bbabed09ce6208 ("perf tools: Add hw_idx in struct branch_stack")
Signed-off-by: Al Grant <al.grant@arm.com>
Reviewed-by: Andrea Brunato <andrea.brunato@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Link: http://lore.kernel.org/lkml/20200819084751.17686-1-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/cs-etm.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
index c283223fb31f2..a2a369e2fbb67 100644
--- a/tools/perf/util/cs-etm.c
+++ b/tools/perf/util/cs-etm.c
@@ -1344,8 +1344,15 @@ static int cs_etm__synth_events(struct cs_etm_auxtrace *etm,
 		attr.sample_type &= ~(u64)PERF_SAMPLE_ADDR;
 	}
 
-	if (etm->synth_opts.last_branch)
+	if (etm->synth_opts.last_branch) {
 		attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
+		/*
+		 * We don't use the hardware index, but the sample generation
+		 * code uses the new format branch_stack with this field,
+		 * so the event attributes must indicate that it's present.
+		 */
+		attr.branch_sample_type |= PERF_SAMPLE_BRANCH_HW_INDEX;
+	}
 
 	if (etm->synth_opts.instructions) {
 		attr.config = PERF_COUNT_HW_INSTRUCTIONS;
-- 
GitLab


From a347306fbec5dcaf7c276777b11d530eab6a4526 Mon Sep 17 00:00:00 2001
From: Al Grant <al.grant@arm.com>
Date: Wed, 19 Aug 2020 16:47:51 +0800
Subject: [PATCH 0895/1341] perf intel-pt: Fix corrupt data after perf inject
 from

Commit 42bbabed09ce6208 ("perf tools: Add hw_idx in struct branch_stack")
changed the format of branch stacks in perf samples. When samples use
this new format, a flag must be set in the corresponding event.

Synthesized branch stacks generated from Intel PT were using the new
format, but not setting the event attribute, leading to consumers
seeing corrupt data. This patch fixes the issue by setting the event
attribute to indicate use of the new format.

Fixes: 42bbabed09ce6208 ("perf tools: Add hw_idx in struct branch_stack")
Signed-off-by: Al Grant <al.grant@arm.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lore.kernel.org/lkml/20200819084751.17686-2-leo.yan@linaro.org
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/intel-pt.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index 2a8d245351e74..0af4e81c46e2b 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -3017,8 +3017,15 @@ static int intel_pt_synth_events(struct intel_pt *pt,
 
 	if (pt->synth_opts.callchain)
 		attr.sample_type |= PERF_SAMPLE_CALLCHAIN;
-	if (pt->synth_opts.last_branch)
+	if (pt->synth_opts.last_branch) {
 		attr.sample_type |= PERF_SAMPLE_BRANCH_STACK;
+		/*
+		 * We don't use the hardware index, but the sample generation
+		 * code uses the new format branch_stack with this field,
+		 * so the event attributes must indicate that it's present.
+		 */
+		attr.branch_sample_type |= PERF_SAMPLE_BRANCH_HW_INDEX;
+	}
 
 	if (pt->synth_opts.instructions) {
 		attr.config = PERF_COUNT_HW_INSTRUCTIONS;
-- 
GitLab


From 39c0a53b114d0317e5c4e76b631f41d133af5cb0 Mon Sep 17 00:00:00 2001
From: Al Grant <al.grant@foss.arm.com>
Date: Tue, 1 Sep 2020 12:10:14 -0300
Subject: [PATCH 0896/1341] perf tools: Correct SNOOPX field offset

perf_event.h has macros that define the field offsets in the data_src
bitmask in perf records. The SNOOPX and REMOTE offsets were both 37.

These are distinct fields, and the bitfield layout in perf_mem_data_src
confirms that SNOOPX should be at offset 38.

Committer notes:

This was extracted from a larger patch that also contained kernel
changes.

Fixes: 52839e653b5629bd ("perf tools: Add support for printing new mem_info encodings")
Signed-off-by: Al Grant <al.grant@arm.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/9974f2d0-bf7f-518e-d9f7-4520e5ff1bb0@foss.arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/include/uapi/linux/perf_event.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h
index 077e7ee69e3d8..3e5dcdd48a499 100644
--- a/tools/include/uapi/linux/perf_event.h
+++ b/tools/include/uapi/linux/perf_event.h
@@ -1196,7 +1196,7 @@ union perf_mem_data_src {
 
 #define PERF_MEM_SNOOPX_FWD	0x01 /* forward */
 /* 1 free */
-#define PERF_MEM_SNOOPX_SHIFT	37
+#define PERF_MEM_SNOOPX_SHIFT	38
 
 /* locked instruction */
 #define PERF_MEM_LOCK_NA	0x01 /* not available */
-- 
GitLab


From 977f739b7126bf98b5202e243f60cbc0a1ec2c3b Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Thu, 27 Aug 2020 15:48:29 +0200
Subject: [PATCH 0897/1341] perf report: Disable ordered_events for raw dump

Disable ordered_events for report raw dump, because for raw dump we want
to see events as they are stored in the perf.data file, not sorted by
time.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200827134830.126721-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/builtin-report.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index ece1cddfcd7c7..3c74c9c0f3c38 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1332,6 +1332,9 @@ int cmd_report(int argc, const char **argv)
 	if (report.mmaps_mode)
 		report.tasks_mode = true;
 
+	if (dump_trace)
+		report.tool.ordered_events = false;
+
 	if (quiet)
 		perf_quiet_option();
 
-- 
GitLab


From 154549558a622b31702fcaa01ccd85e6e34073de Mon Sep 17 00:00:00 2001
From: Cezary Rojewski <cezary.rojewski@intel.com>
Date: Tue, 1 Sep 2020 17:30:41 +0200
Subject: [PATCH 0898/1341] ASoC: Intel: haswell: Fix power transition refactor

While addressing existing power-cycle limitations for
sound/soc/intel/haswell solution, change brings regression for standard
audio userspace flows e.g.: when using PulseAudio.

Occasional sound-card initialization fail is still better than
permanent audio distortions, so revert the change.

Fixes: 8ec7d6043263 ("ASoC: Intel: haswell: Power transition refactor")
Reported-by: Christian Bundy <christianbundy@fraction.io>
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200901153041.14771-1-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/intel/haswell/sst-haswell-dsp.c | 185 ++++++++++------------
 1 file changed, 81 insertions(+), 104 deletions(-)

diff --git a/sound/soc/intel/haswell/sst-haswell-dsp.c b/sound/soc/intel/haswell/sst-haswell-dsp.c
index de80e19454c13..88c3f63bded90 100644
--- a/sound/soc/intel/haswell/sst-haswell-dsp.c
+++ b/sound/soc/intel/haswell/sst-haswell-dsp.c
@@ -243,92 +243,45 @@ static irqreturn_t hsw_irq(int irq, void *context)
 	return ret;
 }
 
-#define CSR_DEFAULT_VALUE 0x8480040E
-#define ISC_DEFAULT_VALUE 0x0
-#define ISD_DEFAULT_VALUE 0x0
-#define IMC_DEFAULT_VALUE 0x7FFF0003
-#define IMD_DEFAULT_VALUE 0x7FFF0003
-#define IPCC_DEFAULT_VALUE 0x0
-#define IPCD_DEFAULT_VALUE 0x0
-#define CLKCTL_DEFAULT_VALUE 0x7FF
-#define CSR2_DEFAULT_VALUE 0x0
-#define LTR_CTRL_DEFAULT_VALUE 0x0
-#define HMD_CTRL_DEFAULT_VALUE 0x0
-
-static void hsw_set_shim_defaults(struct sst_dsp *sst)
-{
-	sst_dsp_shim_write_unlocked(sst, SST_CSR, CSR_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_ISRX, ISC_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_ISRD, ISD_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_IMRX, IMC_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_IMRD, IMD_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_IPCX, IPCC_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_IPCD, IPCD_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_CLKCTL, CLKCTL_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_CSR2, CSR2_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_LTRC, LTR_CTRL_DEFAULT_VALUE);
-	sst_dsp_shim_write_unlocked(sst, SST_HMDC, HMD_CTRL_DEFAULT_VALUE);
-}
-
-/* all clock-gating minus DCLCGE and DTCGE */
-#define SST_VDRTCL2_CG_OTHER	0xB7D
-
 static void hsw_set_dsp_D3(struct sst_dsp *sst)
 {
+	u32 val;
 	u32 reg;
 
-	/* disable clock core gating */
+	/* Disable core clock gating (VDRTCTL2.DCLCGE = 0) */
 	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
-	reg &= ~(SST_VDRTCL2_DCLCGE);
+	reg &= ~(SST_VDRTCL2_DCLCGE | SST_VDRTCL2_DTCGE);
 	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL2);
 
-	/* stall, reset and set 24MHz XOSC */
-	sst_dsp_shim_update_bits_unlocked(sst, SST_CSR,
-			SST_CSR_24MHZ_LPCS | SST_CSR_STALL | SST_CSR_RST,
-			SST_CSR_24MHZ_LPCS | SST_CSR_STALL | SST_CSR_RST);
-
-	/* DRAM power gating all */
-	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL0);
-	reg |= SST_VDRTCL0_ISRAMPGE_MASK |
-		SST_VDRTCL0_DSRAMPGE_MASK;
-	reg &= ~(SST_VDRTCL0_D3SRAMPGD);
-	reg |= SST_VDRTCL0_D3PGD;
-	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL0);
-	udelay(50);
+	/* enable power gating and switch off DRAM & IRAM blocks */
+	val = readl(sst->addr.pci_cfg + SST_VDRTCTL0);
+	val |= SST_VDRTCL0_DSRAMPGE_MASK |
+		SST_VDRTCL0_ISRAMPGE_MASK;
+	val &= ~(SST_VDRTCL0_D3PGD | SST_VDRTCL0_D3SRAMPGD);
+	writel(val, sst->addr.pci_cfg + SST_VDRTCTL0);
 
-	/* PLL shutdown enable */
-	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
-	reg |= SST_VDRTCL2_APLLSE_MASK;
-	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL2);
+	/* switch off audio PLL */
+	val = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
+	val |= SST_VDRTCL2_APLLSE_MASK;
+	writel(val, sst->addr.pci_cfg + SST_VDRTCTL2);
 
-	/* disable MCLK */
+	/* disable MCLK(clkctl.smos = 0) */
 	sst_dsp_shim_update_bits_unlocked(sst, SST_CLKCTL,
-			SST_CLKCTL_MASK, 0);
-
-	/* switch clock gating */
-	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
-	reg |= SST_VDRTCL2_CG_OTHER;
-	reg &= ~(SST_VDRTCL2_DTCGE);
-	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL2);
-	/* enable DTCGE separatelly */
-	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
-	reg |= SST_VDRTCL2_DTCGE;
-	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL2);
+		SST_CLKCTL_MASK, 0);
 
-	/* set shim defaults */
-	hsw_set_shim_defaults(sst);
-
-	/* set D3 */
-	reg = readl(sst->addr.pci_cfg + SST_PMCS);
-	reg |= SST_PMCS_PS_MASK;
-	writel(reg, sst->addr.pci_cfg + SST_PMCS);
+	/* Set D3 state, delay 50 us */
+	val = readl(sst->addr.pci_cfg + SST_PMCS);
+	val |= SST_PMCS_PS_MASK;
+	writel(val, sst->addr.pci_cfg + SST_PMCS);
 	udelay(50);
 
-	/* enable clock core gating */
+	/* Enable core clock gating (VDRTCTL2.DCLCGE = 1), delay 50 us */
 	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
-	reg |= SST_VDRTCL2_DCLCGE;
+	reg |= SST_VDRTCL2_DCLCGE | SST_VDRTCL2_DTCGE;
 	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL2);
+
 	udelay(50);
+
 }
 
 static void hsw_reset(struct sst_dsp *sst)
@@ -346,62 +299,75 @@ static void hsw_reset(struct sst_dsp *sst)
 		SST_CSR_RST | SST_CSR_STALL, SST_CSR_STALL);
 }
 
-/* recommended CSR state for power-up */
-#define SST_CSR_D0_MASK (0x18A09C0C | SST_CSR_DCS_MASK)
-
 static int hsw_set_dsp_D0(struct sst_dsp *sst)
 {
-	u32 reg;
+	int tries = 10;
+	u32 reg, fw_dump_bit;
 
-	/* disable clock core gating */
+	/* Disable core clock gating (VDRTCTL2.DCLCGE = 0) */
 	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
-	reg &= ~(SST_VDRTCL2_DCLCGE);
+	reg &= ~(SST_VDRTCL2_DCLCGE | SST_VDRTCL2_DTCGE);
 	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL2);
 
-	/* switch clock gating */
-	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
-	reg |= SST_VDRTCL2_CG_OTHER;
-	reg &= ~(SST_VDRTCL2_DTCGE);
-	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL2);
+	/* Disable D3PG (VDRTCTL0.D3PGD = 1) */
+	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL0);
+	reg |= SST_VDRTCL0_D3PGD;
+	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL0);
 
-	/* set D0 */
+	/* Set D0 state */
 	reg = readl(sst->addr.pci_cfg + SST_PMCS);
-	reg &= ~(SST_PMCS_PS_MASK);
+	reg &= ~SST_PMCS_PS_MASK;
 	writel(reg, sst->addr.pci_cfg + SST_PMCS);
 
-	/* DRAM power gating none */
-	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL0);
-	reg &= ~(SST_VDRTCL0_ISRAMPGE_MASK |
-		SST_VDRTCL0_DSRAMPGE_MASK);
-	reg |= SST_VDRTCL0_D3SRAMPGD;
-	reg |= SST_VDRTCL0_D3PGD;
-	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL0);
-	mdelay(10);
+	/* check that ADSP shim is enabled */
+	while (tries--) {
+		reg = readl(sst->addr.pci_cfg + SST_PMCS) & SST_PMCS_PS_MASK;
+		if (reg == 0)
+			goto finish;
+
+		msleep(1);
+	}
+
+	return -ENODEV;
 
-	/* set shim defaults */
-	hsw_set_shim_defaults(sst);
+finish:
+	/* select SSP1 19.2MHz base clock, SSP clock 0, turn off Low Power Clock */
+	sst_dsp_shim_update_bits_unlocked(sst, SST_CSR,
+		SST_CSR_S1IOCS | SST_CSR_SBCS1 | SST_CSR_LPCS, 0x0);
+
+	/* stall DSP core, set clk to 192/96Mhz */
+	sst_dsp_shim_update_bits_unlocked(sst,
+		SST_CSR, SST_CSR_STALL | SST_CSR_DCS_MASK,
+		SST_CSR_STALL | SST_CSR_DCS(4));
 
-	/* restore MCLK */
+	/* Set 24MHz MCLK, prevent local clock gating, enable SSP0 clock */
 	sst_dsp_shim_update_bits_unlocked(sst, SST_CLKCTL,
-			SST_CLKCTL_MASK, SST_CLKCTL_MASK);
+		SST_CLKCTL_MASK | SST_CLKCTL_DCPLCG | SST_CLKCTL_SCOE0,
+		SST_CLKCTL_MASK | SST_CLKCTL_DCPLCG | SST_CLKCTL_SCOE0);
 
-	/* PLL shutdown disable */
+	/* Stall and reset core, set CSR */
+	hsw_reset(sst);
+
+	/* Enable core clock gating (VDRTCTL2.DCLCGE = 1), delay 50 us */
 	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
-	reg &= ~(SST_VDRTCL2_APLLSE_MASK);
+	reg |= SST_VDRTCL2_DCLCGE | SST_VDRTCL2_DTCGE;
 	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL2);
 
-	sst_dsp_shim_update_bits_unlocked(sst, SST_CSR,
-			SST_CSR_D0_MASK, SST_CSR_SBCS0 | SST_CSR_SBCS1 |
-			SST_CSR_STALL | SST_CSR_DCS(4));
 	udelay(50);
 
-	/* enable clock core gating */
+	/* switch on audio PLL */
 	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL2);
-	reg |= SST_VDRTCL2_DCLCGE;
+	reg &= ~SST_VDRTCL2_APLLSE_MASK;
 	writel(reg, sst->addr.pci_cfg + SST_VDRTCTL2);
 
-	/* clear reset */
-	sst_dsp_shim_update_bits_unlocked(sst, SST_CSR, SST_CSR_RST, 0);
+	/* set default power gating control, enable power gating control for all blocks. that is,
+	can't be accessed, please enable each block before accessing. */
+	reg = readl(sst->addr.pci_cfg + SST_VDRTCTL0);
+	reg |= SST_VDRTCL0_DSRAMPGE_MASK | SST_VDRTCL0_ISRAMPGE_MASK;
+	/* for D0, always enable the block(DSRAM[0]) used for FW dump */
+	fw_dump_bit = 1 << SST_VDRTCL0_DSRAMPGE_SHIFT;
+	writel(reg & ~fw_dump_bit, sst->addr.pci_cfg + SST_VDRTCTL0);
+
 
 	/* disable DMA finish function for SSP0 & SSP1 */
 	sst_dsp_shim_update_bits_unlocked(sst, SST_CSR2, SST_CSR2_SDFD_SSP1,
@@ -418,6 +384,12 @@ static int hsw_set_dsp_D0(struct sst_dsp *sst)
 	sst_dsp_shim_update_bits(sst, SST_IMRD, (SST_IMRD_DONE | SST_IMRD_BUSY |
 				SST_IMRD_SSP0 | SST_IMRD_DMAC), 0x0);
 
+	/* clear IPC registers */
+	sst_dsp_shim_write(sst, SST_IPCX, 0x0);
+	sst_dsp_shim_write(sst, SST_IPCD, 0x0);
+	sst_dsp_shim_write(sst, 0x80, 0x6);
+	sst_dsp_shim_write(sst, 0xe0, 0x300a);
+
 	return 0;
 }
 
@@ -443,6 +415,11 @@ static void hsw_sleep(struct sst_dsp *sst)
 {
 	dev_dbg(sst->dev, "HSW_PM dsp runtime suspend\n");
 
+	/* put DSP into reset and stall */
+	sst_dsp_shim_update_bits(sst, SST_CSR,
+		SST_CSR_24MHZ_LPCS | SST_CSR_RST | SST_CSR_STALL,
+		SST_CSR_RST | SST_CSR_STALL | SST_CSR_24MHZ_LPCS);
+
 	hsw_set_dsp_D3(sst);
 	dev_dbg(sst->dev, "HSW_PM dsp runtime suspend exit\n");
 }
-- 
GitLab


From 5f7b81c18366c38446f6eedab570b98dbdc07cff Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Fri, 28 Aug 2020 17:01:26 -0700
Subject: [PATCH 0899/1341] ia64: fix min_low_pfn/max_low_pfn build errors

Fix min_low_pfn/max_low_pfn build errors for arch/ia64/: (e.g.)

 ERROR: "max_low_pfn" [drivers/rpmsg/virtio_rpmsg_bus.ko] undefined!
 ERROR: "min_low_pfn" [drivers/rpmsg/virtio_rpmsg_bus.ko] undefined!
 ERROR: "min_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined!
 ERROR: "max_low_pfn" [drivers/hwtracing/intel_th/intel_th_msu.ko] undefined!
 ERROR: "min_low_pfn" [drivers/crypto/cavium/nitrox/n5pf.ko] undefined!
 ERROR: "max_low_pfn" [drivers/crypto/cavium/nitrox/n5pf.ko] undefined!
 ERROR: "max_low_pfn" [drivers/md/dm-integrity.ko] undefined!
 ERROR: "min_low_pfn" [drivers/md/dm-integrity.ko] undefined!
 ERROR: "max_low_pfn" [crypto/tcrypt.ko] undefined!
 ERROR: "min_low_pfn" [crypto/tcrypt.ko] undefined!
 ERROR: "min_low_pfn" [security/keys/encrypted-keys/encrypted-keys.ko] undefined!
 ERROR: "max_low_pfn" [security/keys/encrypted-keys/encrypted-keys.ko] undefined!
 ERROR: "min_low_pfn" [arch/ia64/kernel/mca_recovery.ko] undefined!
 ERROR: "max_low_pfn" [arch/ia64/kernel/mca_recovery.ko] undefined!

David suggested just exporting min_low_pfn & max_low_pfn in
mm/memblock.c:
https://lore.kernel.org/lkml/alpine.DEB.2.22.394.2006291911220.1118534@chino.kir.corp.google.com/

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: linux-mm@kvack.org
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: linux-ia64@vger.kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
 arch/ia64/kernel/ia64_ksyms.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/ia64/kernel/ia64_ksyms.c b/arch/ia64/kernel/ia64_ksyms.c
index b49fe6f618edb..f8150ee74f297 100644
--- a/arch/ia64/kernel/ia64_ksyms.c
+++ b/arch/ia64/kernel/ia64_ksyms.c
@@ -3,7 +3,7 @@
  * Architecture-specific kernel symbols
  */
 
-#ifdef CONFIG_VIRTUAL_MEM_MAP
+#if defined(CONFIG_VIRTUAL_MEM_MAP) || defined(CONFIG_DISCONTIGMEM)
 #include <linux/compiler.h>
 #include <linux/export.h>
 #include <linux/memblock.h>
-- 
GitLab


From 4af22ded0ecf23adea1b26ea264c53f9f1cfc310 Mon Sep 17 00:00:00 2001
From: Mike Rapoport <rppt@linux.ibm.com>
Date: Fri, 28 Aug 2020 19:39:02 +0300
Subject: [PATCH 0900/1341] arc: fix memory initialization for systems with two
 memory banks

Rework of memory map initialization broke initialization of ARC systems
with two memory banks. Before these changes, memblock was not aware of
nodes configuration and the memory map was always allocated from the
"lowmem" bank. After the addition of node information to memblock, the core
mm attempts to allocate the memory map for the "highmem" bank from its
node. The access to this memory using __va() fails because it can be only
accessed using kmap.

Anther problem that was uncovered is that {min,max}_high_pfn are calculated
from u64 high_mem_start variable which prevents truncation to 32-bit
physical address and the PFN values are above the node and zone boundaries.

Use phys_addr_t type for high_mem_start and high_mem_size to ensure
correspondence between PFNs and highmem zone boundaries and reserve the
entire highmem bank until mem_init() to avoid accesses to it before highmem
is enabled.

To test this:
1. Enable HIGHMEM in ARC config
2. Enable 2 memory banks in haps_hs.dts (uncomment the 2nd bank)

Fixes: 51930df5801e ("mm: free_area_init: allow defining max_zone_pfn in descending order")
Cc: stable@vger.kernel.org   [5.8]
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: added instructions to test highmem]
---
 arch/arc/mm/init.c | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index f886ac69d8ada..3a35b82a718e3 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -26,8 +26,8 @@ static unsigned long low_mem_sz;
 
 #ifdef CONFIG_HIGHMEM
 static unsigned long min_high_pfn, max_high_pfn;
-static u64 high_mem_start;
-static u64 high_mem_sz;
+static phys_addr_t high_mem_start;
+static phys_addr_t high_mem_sz;
 #endif
 
 #ifdef CONFIG_DISCONTIGMEM
@@ -69,6 +69,7 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 		high_mem_sz = size;
 		in_use = 1;
 		memblock_add_node(base, size, 1);
+		memblock_reserve(base, size);
 #endif
 	}
 
@@ -157,7 +158,7 @@ void __init setup_arch_memory(void)
 	min_high_pfn = PFN_DOWN(high_mem_start);
 	max_high_pfn = PFN_DOWN(high_mem_start + high_mem_sz);
 
-	max_zone_pfn[ZONE_HIGHMEM] = max_high_pfn;
+	max_zone_pfn[ZONE_HIGHMEM] = min_low_pfn;
 
 	high_memory = (void *)(min_high_pfn << PAGE_SHIFT);
 	kmap_init();
@@ -166,22 +167,26 @@ void __init setup_arch_memory(void)
 	free_area_init(max_zone_pfn);
 }
 
-/*
- * mem_init - initializes memory
- *
- * Frees up bootmem
- * Calculates and displays memory available/used
- */
-void __init mem_init(void)
+static void __init highmem_init(void)
 {
 #ifdef CONFIG_HIGHMEM
 	unsigned long tmp;
 
-	reset_all_zones_managed_pages();
+	memblock_free(high_mem_start, high_mem_sz);
 	for (tmp = min_high_pfn; tmp < max_high_pfn; tmp++)
 		free_highmem_page(pfn_to_page(tmp));
 #endif
+}
 
+/*
+ * mem_init - initializes memory
+ *
+ * Frees up bootmem
+ * Calculates and displays memory available/used
+ */
+void __init mem_init(void)
+{
 	memblock_free_all();
+	highmem_init();
 	mem_init_print_info(NULL);
 }
-- 
GitLab


From 355db39110100b968c8291a1a7d897f92e17a8df Mon Sep 17 00:00:00 2001
From: Leesoo Ahn <dev@ooseel.net>
Date: Tue, 1 Sep 2020 22:04:47 +0900
Subject: [PATCH 0901/1341] pktgen: fix error message with wrong function name

Error on calling kthread_create_on_node prints wrong function name,
kernel_thread.

Fixes: 94dcf29a11b3 ("kthread: use kthread_create_on_node()")
Signed-off-by: Leesoo Ahn <dev@ooseel.net>
Acked-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/core/pktgen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/pktgen.c b/net/core/pktgen.c
index b53b6d38c4dff..fce968b673b30 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -3699,7 +3699,7 @@ static int __net_init pktgen_create_thread(int cpu, struct pktgen_net *pn)
 				   cpu_to_node(cpu),
 				   "kpktgend_%d", cpu);
 	if (IS_ERR(p)) {
-		pr_err("kernel_thread() failed for cpu %d\n", t->cpu);
+		pr_err("kthread_create_on_node() failed for cpu %d\n", t->cpu);
 		list_del(&t->th_list);
 		kfree(t);
 		return PTR_ERR(p);
-- 
GitLab


From 26907eb605fbc3ba9dbf888f21d9d8d04471271d Mon Sep 17 00:00:00 2001
From: Evgeniy Didin <Evgeniy.Didin@synopsys.com>
Date: Tue, 7 Jul 2020 18:38:58 +0300
Subject: [PATCH 0902/1341] ARC: [plat-hsdk]: Switch ethernet phy-mode to
 rgmii-id

HSDK board has Micrel KSZ9031, recent commit
bcf3440c6dd ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY")
caused a breakdown of Ethernet.
Using 'phy-mode = "rgmii"' is not correct because accodring RGMII
specification it is necessary to have delay on RX (PHY to MAX)
which is not generated in case of "rgmii".
Using "rgmii-id" adds necessary delay and solves the issue.

Also adding name of PHY placed on HSDK board.

Signed-off-by: Evgeniy Didin <Evgeniy.Didin@synopsys.com>
Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Cc: Alexey Brodkin <abrodkin@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
 arch/arc/boot/dts/hsdk.dts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arc/boot/dts/hsdk.dts b/arch/arc/boot/dts/hsdk.dts
index 5d64a5a940ee6..dcaa44e408ace 100644
--- a/arch/arc/boot/dts/hsdk.dts
+++ b/arch/arc/boot/dts/hsdk.dts
@@ -210,7 +210,7 @@ gmac: ethernet@8000 {
 			reg = <0x8000 0x2000>;
 			interrupts = <10>;
 			interrupt-names = "macirq";
-			phy-mode = "rgmii";
+			phy-mode = "rgmii-id";
 			snps,pbl = <32>;
 			snps,multicast-filter-bins = <256>;
 			clocks = <&gmacclk>;
@@ -228,7 +228,7 @@ mdio {
 				#address-cells = <1>;
 				#size-cells = <0>;
 				compatible = "snps,dwmac-mdio";
-				phy0: ethernet-phy@0 {
+				phy0: ethernet-phy@0 { /* Micrel KSZ9031 */
 					reg = <0>;
 				};
 			};
-- 
GitLab


From 43298db3009f06fe5c69e1ca8b6cfc2565772fa1 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 20 Aug 2020 17:40:02 +0200
Subject: [PATCH 0903/1341] cpufreq: intel_pstate: Refuse to turn off with HWP
 enabled

After commit f6ebbcf08f37 ("cpufreq: intel_pstate: Implement passive
mode with HWP enabled") it is possible to change the driver status
to "off" via sysfs with HWP enabled, which effectively causes the
driver to unregister itself, but HWP remains active and it forces the
minimum performance, so even if another cpufreq driver is loaded,
it will not be able to control the CPU frequency.

For this reason, make the driver refuse to change the status to
"off" with HWP enabled.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
 drivers/cpufreq/intel_pstate.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index e0220a6fbc69e..bcda1e700a730 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2716,9 +2716,15 @@ static int intel_pstate_update_status(const char *buf, size_t size)
 {
 	int ret;
 
-	if (size == 3 && !strncmp(buf, "off", size))
-		return intel_pstate_driver ?
-			intel_pstate_unregister_driver() : -EINVAL;
+	if (size == 3 && !strncmp(buf, "off", size)) {
+		if (!intel_pstate_driver)
+			return -EINVAL;
+
+		if (hwp_active)
+			return -EBUSY;
+
+		return intel_pstate_unregister_driver();
+	}
 
 	if (size == 6 && !strncmp(buf, "active", size)) {
 		if (intel_pstate_driver) {
-- 
GitLab


From c27a0ccc3c715c55fea6709eab2f9c6f551fcfaa Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 27 Aug 2020 14:32:00 +0200
Subject: [PATCH 0904/1341] cpufreq: intel_pstate: Update cached EPP in the
 active mode

Make intel_pstate update the cached EPP value when setting the EPP
via sysfs in the active mode just like it is the case in the passive
mode, for consistency, but also for the benefit of subsequent
changes.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
 drivers/cpufreq/intel_pstate.c | 20 +++++++++++++++-----
 1 file changed, 15 insertions(+), 5 deletions(-)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index bcda1e700a730..e540448e0bd0c 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -644,6 +644,8 @@ static int intel_pstate_get_energy_pref_index(struct cpudata *cpu_data, int *raw
 
 static int intel_pstate_set_epp(struct cpudata *cpu, u32 epp)
 {
+	int ret;
+
 	/*
 	 * Use the cached HWP Request MSR value, because in the active mode the
 	 * register itself may be updated by intel_pstate_hwp_boost_up() or
@@ -659,7 +661,11 @@ static int intel_pstate_set_epp(struct cpudata *cpu, u32 epp)
 	 * function, so it cannot run in parallel with the update below.
 	 */
 	WRITE_ONCE(cpu->hwp_req_cached, value);
-	return wrmsrl_on_cpu(cpu->cpu, MSR_HWP_REQUEST, value);
+	ret = wrmsrl_on_cpu(cpu->cpu, MSR_HWP_REQUEST, value);
+	if (!ret)
+		cpu->epp_cached = epp;
+
+	return ret;
 }
 
 static int intel_pstate_set_energy_pref_index(struct cpudata *cpu_data,
@@ -762,10 +768,8 @@ static ssize_t store_energy_performance_preference(
 			cpufreq_stop_governor(policy);
 			ret = intel_pstate_set_epp(cpu, epp);
 			err = cpufreq_start_governor(policy);
-			if (!ret) {
-				cpu->epp_cached = epp;
+			if (!ret)
 				ret = err;
-			}
 		}
 	}
 
@@ -2378,6 +2382,12 @@ static int intel_pstate_cpu_init(struct cpufreq_policy *policy)
 	 */
 	policy->policy = CPUFREQ_POLICY_POWERSAVE;
 
+	if (hwp_active) {
+		struct cpudata *cpu = all_cpu_data[policy->cpu];
+
+		cpu->epp_cached = intel_pstate_get_epp(cpu, 0);
+	}
+
 	return 0;
 }
 
@@ -2585,7 +2595,7 @@ static int intel_cpufreq_cpu_init(struct cpufreq_policy *policy)
 		policy->transition_delay_us = INTEL_CPUFREQ_TRANSITION_DELAY_HWP;
 		rdmsrl_on_cpu(cpu->cpu, MSR_HWP_REQUEST, &value);
 		WRITE_ONCE(cpu->hwp_req_cached, value);
-		cpu->epp_cached = (value & GENMASK_ULL(31, 24)) >> 24;
+		cpu->epp_cached = intel_pstate_get_epp(cpu, value);
 	} else {
 		turbo_max = cpu->pstate.turbo_pstate;
 		policy->transition_delay_us = INTEL_CPUFREQ_TRANSITION_DELAY;
-- 
GitLab


From b388eb58ce47484a330681f09d1d058fe122c744 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Thu, 27 Aug 2020 14:32:12 +0200
Subject: [PATCH 0905/1341] cpufreq: intel_pstate: Tweak the EPP sysfs
 interface

Modify the EPP sysfs interface to reject attempts to change the EPP
to values different from 0 ("performance") in the active mode with
the "performance" policy (ie. scaling_governor set to "performance"),
to avoid situations in which the kernel appears to discard data
passed to it via the EPP sysfs attribute.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
 Documentation/admin-guide/pm/intel_pstate.rst | 4 +++-
 drivers/cpufreq/intel_pstate.c                | 8 ++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/pm/intel_pstate.rst b/Documentation/admin-guide/pm/intel_pstate.rst
index cdd1a9a7f9a29..5072e7064d13d 100644
--- a/Documentation/admin-guide/pm/intel_pstate.rst
+++ b/Documentation/admin-guide/pm/intel_pstate.rst
@@ -123,7 +123,9 @@ Energy-Performance Bias (EPB) knob (otherwise), which means that the processor's
 internal P-state selection logic is expected to focus entirely on performance.
 
 This will override the EPP/EPB setting coming from the ``sysfs`` interface
-(see `Energy vs Performance Hints`_ below).
+(see `Energy vs Performance Hints`_ below).  Moreover, any attempts to change
+the EPP/EPB to a value different from 0 ("performance") via ``sysfs`` in this
+configuration will be rejected.
 
 Also, in this configuration the range of P-states available to the processor's
 internal P-state selection logic is always restricted to the upper boundary
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index e540448e0bd0c..b308c39b62040 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -684,6 +684,14 @@ static int intel_pstate_set_energy_pref_index(struct cpudata *cpu_data,
 		else if (epp == -EINVAL)
 			epp = epp_values[pref_index - 1];
 
+		/*
+		 * To avoid confusion, refuse to set EPP to any values different
+		 * from 0 (performance) if the current policy is "performance",
+		 * because those values would be overridden.
+		 */
+		if (epp > 0 && cpu_data->policy == CPUFREQ_POLICY_PERFORMANCE)
+			return -EBUSY;
+
 		ret = intel_pstate_set_epp(cpu_data, epp);
 	} else {
 		if (epp == -EINVAL)
-- 
GitLab


From 4adcf2e5829f83cbab581ba376abb7cb6404eeb3 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Tue, 1 Sep 2020 18:33:21 +0200
Subject: [PATCH 0906/1341] cpufreq: intel_pstate: Add ->offline and ->online
 callbacks

Add ->offline and ->online driver callbacks to prepare for taking a
CPU offline and to restore its working configuration when it goes
back online, respectively, to avoid invoking the ->init callback on
every CPU online which is quite a bit of unnecessary overhead.

Define ->offline and ->online so that they can be used in the
passive mode as well as in the active mode and because ->offline
will do the majority of ->stop_cpu work, the passive mode does
not need that callback any more, so drop it from there.

Also modify the active mode ->suspend and ->resume callbacks to
prevent them from interfering with the new ->offline and ->online
ones in case the latter are invoked withing the system-wide suspend
and resume code flow and make the passive mode use them too.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
 drivers/cpufreq/intel_pstate.c | 143 ++++++++++++++++++++++-----------
 1 file changed, 94 insertions(+), 49 deletions(-)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index b308c39b62040..8181a1f1dc79a 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -219,14 +219,13 @@ struct global_params {
  * @epp_policy:		Last saved policy used to set EPP/EPB
  * @epp_default:	Power on default HWP energy performance
  *			preference/bias
- * @epp_saved:		Saved EPP/EPB during system suspend or CPU offline
- *			operation
  * @epp_cached		Cached HWP energy-performance preference value
  * @hwp_req_cached:	Cached value of the last HWP Request MSR
  * @hwp_cap_cached:	Cached value of the last HWP Capabilities MSR
  * @last_io_update:	Last time when IO wake flag was set
  * @sched_flags:	Store scheduler flags for possible cross CPU update
  * @hwp_boost_min:	Last HWP boosted min performance
+ * @suspended:		Whether or not the driver has been suspended.
  *
  * This structure stores per CPU instance data for all CPUs.
  */
@@ -258,13 +257,13 @@ struct cpudata {
 	s16 epp_powersave;
 	s16 epp_policy;
 	s16 epp_default;
-	s16 epp_saved;
 	s16 epp_cached;
 	u64 hwp_req_cached;
 	u64 hwp_cap_cached;
 	u64 last_io_update;
 	unsigned int sched_flags;
 	u32 hwp_boost_min;
+	bool suspended;
 };
 
 static struct cpudata **all_cpu_data;
@@ -871,12 +870,6 @@ static void intel_pstate_hwp_set(unsigned int cpu)
 
 	cpu_data->epp_policy = cpu_data->policy;
 
-	if (cpu_data->epp_saved >= 0) {
-		epp = cpu_data->epp_saved;
-		cpu_data->epp_saved = -EINVAL;
-		goto update_epp;
-	}
-
 	if (cpu_data->policy == CPUFREQ_POLICY_PERFORMANCE) {
 		epp = intel_pstate_get_epp(cpu_data, value);
 		cpu_data->epp_powersave = epp;
@@ -903,7 +896,6 @@ static void intel_pstate_hwp_set(unsigned int cpu)
 
 		epp = cpu_data->epp_powersave;
 	}
-update_epp:
 	if (boot_cpu_has(X86_FEATURE_HWP_EPP)) {
 		value &= ~GENMASK_ULL(31, 24);
 		value |= (u64)epp << 24;
@@ -915,14 +907,24 @@ static void intel_pstate_hwp_set(unsigned int cpu)
 	wrmsrl_on_cpu(cpu, MSR_HWP_REQUEST, value);
 }
 
-static void intel_pstate_hwp_force_min_perf(int cpu)
+static void intel_pstate_hwp_offline(struct cpudata *cpu)
 {
-	u64 value;
+	u64 value = READ_ONCE(cpu->hwp_req_cached);
 	int min_perf;
 
-	value = all_cpu_data[cpu]->hwp_req_cached;
+	if (boot_cpu_has(X86_FEATURE_HWP_EPP)) {
+		/*
+		 * In case the EPP has been set to "performance" by the
+		 * active mode "performance" scaling algorithm, replace that
+		 * temporary value with the cached EPP one.
+		 */
+		value &= ~GENMASK_ULL(31, 24);
+		value |= HWP_ENERGY_PERF_PREFERENCE(cpu->epp_cached);
+		WRITE_ONCE(cpu->hwp_req_cached, value);
+	}
+
 	value &= ~GENMASK_ULL(31, 0);
-	min_perf = HWP_LOWEST_PERF(all_cpu_data[cpu]->hwp_cap_cached);
+	min_perf = HWP_LOWEST_PERF(cpu->hwp_cap_cached);
 
 	/* Set hwp_max = hwp_min */
 	value |= HWP_MAX_PERF(min_perf);
@@ -932,19 +934,7 @@ static void intel_pstate_hwp_force_min_perf(int cpu)
 	if (boot_cpu_has(X86_FEATURE_HWP_EPP))
 		value |= HWP_ENERGY_PERF_PREFERENCE(HWP_EPP_POWERSAVE);
 
-	wrmsrl_on_cpu(cpu, MSR_HWP_REQUEST, value);
-}
-
-static int intel_pstate_hwp_save_state(struct cpufreq_policy *policy)
-{
-	struct cpudata *cpu_data = all_cpu_data[policy->cpu];
-
-	if (!hwp_active)
-		return 0;
-
-	cpu_data->epp_saved = intel_pstate_get_epp(cpu_data, 0);
-
-	return 0;
+	wrmsrl_on_cpu(cpu->cpu, MSR_HWP_REQUEST, value);
 }
 
 #define POWER_CTL_EE_ENABLE	1
@@ -971,8 +961,28 @@ static void set_power_ctl_ee_state(bool input)
 
 static void intel_pstate_hwp_enable(struct cpudata *cpudata);
 
+static void intel_pstate_hwp_reenable(struct cpudata *cpu)
+{
+	intel_pstate_hwp_enable(cpu);
+	wrmsrl_on_cpu(cpu->cpu, MSR_HWP_REQUEST, READ_ONCE(cpu->hwp_req_cached));
+}
+
+static int intel_pstate_suspend(struct cpufreq_policy *policy)
+{
+	struct cpudata *cpu = all_cpu_data[policy->cpu];
+
+	pr_debug("CPU %d suspending\n", cpu->cpu);
+
+	cpu->suspended = true;
+
+	return 0;
+}
+
 static int intel_pstate_resume(struct cpufreq_policy *policy)
 {
+	struct cpudata *cpu = all_cpu_data[policy->cpu];
+
+	pr_debug("CPU %d resuming\n", cpu->cpu);
 
 	/* Only restore if the system default is changed */
 	if (power_ctl_ee_state == POWER_CTL_EE_ENABLE)
@@ -980,18 +990,16 @@ static int intel_pstate_resume(struct cpufreq_policy *policy)
 	else if (power_ctl_ee_state == POWER_CTL_EE_DISABLE)
 		set_power_ctl_ee_state(false);
 
-	if (!hwp_active)
-		return 0;
+	if (cpu->suspended && hwp_active) {
+		mutex_lock(&intel_pstate_limits_lock);
 
-	mutex_lock(&intel_pstate_limits_lock);
-
-	if (policy->cpu == 0)
-		intel_pstate_hwp_enable(all_cpu_data[policy->cpu]);
+		/* Re-enable HWP, because "online" has not done that. */
+		intel_pstate_hwp_reenable(cpu);
 
-	all_cpu_data[policy->cpu]->epp_policy = 0;
-	intel_pstate_hwp_set(policy->cpu);
+		mutex_unlock(&intel_pstate_limits_lock);
+	}
 
-	mutex_unlock(&intel_pstate_limits_lock);
+	cpu->suspended = false;
 
 	return 0;
 }
@@ -1440,7 +1448,6 @@ static void intel_pstate_hwp_enable(struct cpudata *cpudata)
 		wrmsrl_on_cpu(cpudata->cpu, MSR_HWP_INTERRUPT, 0x00);
 
 	wrmsrl_on_cpu(cpudata->cpu, MSR_PM_ENABLE, 0x1);
-	cpudata->epp_policy = 0;
 	if (cpudata->epp_default == -EINVAL)
 		cpudata->epp_default = intel_pstate_get_epp(cpudata, 0);
 }
@@ -2111,7 +2118,6 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
 
 		cpu->epp_default = -EINVAL;
 		cpu->epp_powersave = -EINVAL;
-		cpu->epp_saved = -EINVAL;
 	}
 
 	cpu = all_cpu_data[cpunum];
@@ -2122,6 +2128,7 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
 		const struct x86_cpu_id *id;
 
 		intel_pstate_hwp_enable(cpu);
+		cpu->epp_policy = 0;
 
 		id = x86_match_cpu(intel_pstate_hwp_boost_ids);
 		if (id && intel_pstate_acpi_pm_profile_server())
@@ -2308,28 +2315,61 @@ static int intel_pstate_verify_policy(struct cpufreq_policy_data *policy)
 	return 0;
 }
 
-static void intel_cpufreq_stop_cpu(struct cpufreq_policy *policy)
+static int intel_pstate_cpu_offline(struct cpufreq_policy *policy)
 {
+	struct cpudata *cpu = all_cpu_data[policy->cpu];
+
+	pr_debug("CPU %d going offline\n", cpu->cpu);
+
+	if (cpu->suspended)
+		return 0;
+
+	/*
+	 * If the CPU is an SMT thread and it goes offline with the performance
+	 * settings different from the minimum, it will prevent its sibling
+	 * from getting to lower performance levels, so force the minimum
+	 * performance on CPU offline to prevent that from happening.
+	 */
 	if (hwp_active)
-		intel_pstate_hwp_force_min_perf(policy->cpu);
+		intel_pstate_hwp_offline(cpu);
 	else
-		intel_pstate_set_min_pstate(all_cpu_data[policy->cpu]);
+		intel_pstate_set_min_pstate(cpu);
+
+	intel_pstate_exit_perf_limits(policy);
+
+	return 0;
+}
+
+static int intel_pstate_cpu_online(struct cpufreq_policy *policy)
+{
+	struct cpudata *cpu = all_cpu_data[policy->cpu];
+
+	pr_debug("CPU %d going online\n", cpu->cpu);
+
+	intel_pstate_init_acpi_perf_limits(policy);
+
+	if (hwp_active) {
+		/*
+		 * Re-enable HWP and clear the "suspended" flag to let "resume"
+		 * know that it need not do that.
+		 */
+		intel_pstate_hwp_reenable(cpu);
+		cpu->suspended = false;
+	}
+
+	return 0;
 }
 
 static void intel_pstate_stop_cpu(struct cpufreq_policy *policy)
 {
-	pr_debug("CPU %d exiting\n", policy->cpu);
+	pr_debug("CPU %d stopping\n", policy->cpu);
 
 	intel_pstate_clear_update_util_hook(policy->cpu);
-	if (hwp_active)
-		intel_pstate_hwp_save_state(policy);
-
-	intel_cpufreq_stop_cpu(policy);
 }
 
 static int intel_pstate_cpu_exit(struct cpufreq_policy *policy)
 {
-	intel_pstate_exit_perf_limits(policy);
+	pr_debug("CPU %d exiting\n", policy->cpu);
 
 	policy->fast_switch_possible = false;
 
@@ -2403,11 +2443,13 @@ static struct cpufreq_driver intel_pstate = {
 	.flags		= CPUFREQ_CONST_LOOPS,
 	.verify		= intel_pstate_verify_policy,
 	.setpolicy	= intel_pstate_set_policy,
-	.suspend	= intel_pstate_hwp_save_state,
+	.suspend	= intel_pstate_suspend,
 	.resume		= intel_pstate_resume,
 	.init		= intel_pstate_cpu_init,
 	.exit		= intel_pstate_cpu_exit,
 	.stop_cpu	= intel_pstate_stop_cpu,
+	.offline	= intel_pstate_cpu_offline,
+	.online		= intel_pstate_cpu_online,
 	.update_limits	= intel_pstate_update_limits,
 	.name		= "intel_pstate",
 };
@@ -2662,7 +2704,10 @@ static struct cpufreq_driver intel_cpufreq = {
 	.fast_switch	= intel_cpufreq_fast_switch,
 	.init		= intel_cpufreq_cpu_init,
 	.exit		= intel_cpufreq_cpu_exit,
-	.stop_cpu	= intel_cpufreq_stop_cpu,
+	.offline	= intel_pstate_cpu_offline,
+	.online		= intel_pstate_cpu_online,
+	.suspend	= intel_pstate_suspend,
+	.resume		= intel_pstate_resume,
 	.update_limits	= intel_pstate_update_limits,
 	.name		= "intel_cpufreq",
 };
-- 
GitLab


From 55671ea3257ac596abd817c4031a996b2867e586 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Tue, 1 Sep 2020 18:33:41 +0200
Subject: [PATCH 0907/1341] cpufreq: intel_pstate: Free memory only when
 turning off

When intel_pstate switches the operation mode from "active" to
"passive" or the other way around, freeing its data structures
representing CPUs and allocating them again from scratch is not
necessary and wasteful.  Moreover, if these data structures are
preserved, the cached HWP Request MSR value from there may be
written to the MSR to start with to reinitialize it and help to
restore the EPP value set previously (it is set to 0xFF when CPUs
go offline to allow their SMT siblings to use the full range of
EPP values and that also happens when the driver gets unregistered).

Accordingly, modify the driver to only do a full cleanup on driver
object registration errors and when its status is changed to "off"
via sysfs and to write the cached HWP Request MSR value back to
the MSR on CPU init if the data structure representing the given
CPU is still there.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
 drivers/cpufreq/intel_pstate.c | 57 ++++++++++++++--------------------
 1 file changed, 24 insertions(+), 33 deletions(-)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index 8181a1f1dc79a..c92c085fc495a 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -2116,25 +2116,31 @@ static int intel_pstate_init_cpu(unsigned int cpunum)
 
 		all_cpu_data[cpunum] = cpu;
 
-		cpu->epp_default = -EINVAL;
-		cpu->epp_powersave = -EINVAL;
-	}
+		cpu->cpu = cpunum;
 
-	cpu = all_cpu_data[cpunum];
+		cpu->epp_default = -EINVAL;
 
-	cpu->cpu = cpunum;
+		if (hwp_active) {
+			const struct x86_cpu_id *id;
 
-	if (hwp_active) {
-		const struct x86_cpu_id *id;
+			intel_pstate_hwp_enable(cpu);
 
-		intel_pstate_hwp_enable(cpu);
-		cpu->epp_policy = 0;
-
-		id = x86_match_cpu(intel_pstate_hwp_boost_ids);
-		if (id && intel_pstate_acpi_pm_profile_server())
-			hwp_boost = true;
+			id = x86_match_cpu(intel_pstate_hwp_boost_ids);
+			if (id && intel_pstate_acpi_pm_profile_server())
+				hwp_boost = true;
+		}
+	} else if (hwp_active) {
+		/*
+		 * Re-enable HWP in case this happens after a resume from ACPI
+		 * S3 if the CPU was offline during the whole system/resume
+		 * cycle.
+		 */
+		intel_pstate_hwp_reenable(cpu);
 	}
 
+	cpu->epp_powersave = -EINVAL;
+	cpu->epp_policy = 0;
+
 	intel_pstate_get_cpu_pstates(cpu);
 
 	pr_debug("controlling: cpu %d\n", cpunum);
@@ -2730,9 +2736,6 @@ static void intel_pstate_driver_cleanup(void)
 	}
 	put_online_cpus();
 
-	if (intel_pstate_driver == &intel_pstate)
-		intel_pstate_sysfs_hide_hwp_dynamic_boost();
-
 	intel_pstate_driver = NULL;
 }
 
@@ -2758,14 +2761,6 @@ static int intel_pstate_register_driver(struct cpufreq_driver *driver)
 	return 0;
 }
 
-static int intel_pstate_unregister_driver(void)
-{
-	cpufreq_unregister_driver(intel_pstate_driver);
-	intel_pstate_driver_cleanup();
-
-	return 0;
-}
-
 static ssize_t intel_pstate_show_status(char *buf)
 {
 	if (!intel_pstate_driver)
@@ -2777,8 +2772,6 @@ static ssize_t intel_pstate_show_status(char *buf)
 
 static int intel_pstate_update_status(const char *buf, size_t size)
 {
-	int ret;
-
 	if (size == 3 && !strncmp(buf, "off", size)) {
 		if (!intel_pstate_driver)
 			return -EINVAL;
@@ -2786,7 +2779,8 @@ static int intel_pstate_update_status(const char *buf, size_t size)
 		if (hwp_active)
 			return -EBUSY;
 
-		return intel_pstate_unregister_driver();
+		cpufreq_unregister_driver(intel_pstate_driver);
+		intel_pstate_driver_cleanup();
 	}
 
 	if (size == 6 && !strncmp(buf, "active", size)) {
@@ -2794,9 +2788,7 @@ static int intel_pstate_update_status(const char *buf, size_t size)
 			if (intel_pstate_driver == &intel_pstate)
 				return 0;
 
-			ret = intel_pstate_unregister_driver();
-			if (ret)
-				return ret;
+			cpufreq_unregister_driver(intel_pstate_driver);
 		}
 
 		return intel_pstate_register_driver(&intel_pstate);
@@ -2807,9 +2799,8 @@ static int intel_pstate_update_status(const char *buf, size_t size)
 			if (intel_pstate_driver == &intel_cpufreq)
 				return 0;
 
-			ret = intel_pstate_unregister_driver();
-			if (ret)
-				return ret;
+			cpufreq_unregister_driver(intel_pstate_driver);
+			intel_pstate_sysfs_hide_hwp_dynamic_boost();
 		}
 
 		return intel_pstate_register_driver(&intel_cpufreq);
-- 
GitLab


From eacc9c5a927e474c173a5d53dd7fb8e306511768 Mon Sep 17 00:00:00 2001
From: Francisco Jerez <currojerez@riseup.net>
Date: Mon, 31 Aug 2020 20:02:50 -0700
Subject: [PATCH 0908/1341] cpufreq: intel_pstate: Fix
 intel_pstate_get_hwp_max() for turbo disabled

This fixes the behavior of the scaling_max_freq and scaling_min_freq
sysfs files in systems which had turbo disabled by the BIOS.

Caleb noticed that the HWP is programmed to operate in the wrong
P-state range on his system when the CPUFREQ policy min/max frequency
is set via sysfs.  This seems to be because in his system
intel_pstate_get_hwp_max() is returning the maximum turbo P-state even
though turbo was disabled by the BIOS, which causes intel_pstate to
scale kHz frequencies incorrectly e.g. setting the maximum turbo
frequency whenever the maximum guaranteed frequency is requested via
sysfs.

Tested-by: Caleb Callaway <caleb.callaway@intel.com>
Signed-off-by: Francisco Jerez <currojerez@riseup.net>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
[ rjw: Minor subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpufreq/intel_pstate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index c92c085fc495a..a827b000ef517 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -836,7 +836,7 @@ static void intel_pstate_get_hwp_max(unsigned int cpu, int *phy_max,
 
 	rdmsrl_on_cpu(cpu, MSR_HWP_CAPABILITIES, &cap);
 	WRITE_ONCE(all_cpu_data[cpu]->hwp_cap_cached, cap);
-	if (global.no_turbo)
+	if (global.no_turbo || global.turbo_disabled)
 		*current_max = HWP_GUARANTEED_PERF(cap);
 	else
 		*current_max = HWP_HIGHEST_PERF(cap);
-- 
GitLab


From cbedcb044e9cc4e14bbe6658111224bb923094f4 Mon Sep 17 00:00:00 2001
From: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Date: Mon, 31 Aug 2020 22:37:09 +0800
Subject: [PATCH 0909/1341] net: ethernet: mlx4: Fix memory allocation in
 mlx4_buddy_init()

On machines with much memory (> 2 TByte) and log_mtts_per_seg == 0, a
max_order of 31 will be passed to mlx_buddy_init(), which results in
s = BITS_TO_LONGS(1 << 31) becoming a negative value, leading to
kvmalloc_array() failure when it is converted to size_t.

  mlx4_core 0000:b1:00.0: Failed to initialize memory region table, aborting
  mlx4_core: probe of 0000:b1:00.0 failed with error -12

Fix this issue by changing the left shifting operand from a signed literal to
an unsigned one.

Fixes: 225c7b1feef1 ("IB/mlx4: Add a driver Mellanox ConnectX InfiniBand adapters")
Signed-off-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/mellanox/mlx4/mr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mellanox/mlx4/mr.c b/drivers/net/ethernet/mellanox/mlx4/mr.c
index d2986f1f2db02..d7444782bfdd0 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mr.c
+++ b/drivers/net/ethernet/mellanox/mlx4/mr.c
@@ -114,7 +114,7 @@ static int mlx4_buddy_init(struct mlx4_buddy *buddy, int max_order)
 		goto err_out;
 
 	for (i = 0; i <= buddy->max_order; ++i) {
-		s = BITS_TO_LONGS(1 << (buddy->max_order - i));
+		s = BITS_TO_LONGS(1UL << (buddy->max_order - i));
 		buddy->bits[i] = kvmalloc_array(s, sizeof(long), GFP_KERNEL | __GFP_ZERO);
 		if (!buddy->bits[i])
 			goto err_out_free;
-- 
GitLab


From f9e040efcc28309e5c592f7e79085a9a52e31f58 Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@redhat.com>
Date: Mon, 24 Aug 2020 11:09:47 -0400
Subject: [PATCH 0910/1341] dm writecache: handle DAX to partitions on
 persistent memory correctly

The function dax_direct_access doesn't take partitions into account,
it always maps pages from the beginning of the device. Therefore,
persistent_memory_claim() must get the partition offset using
get_start_sect() and add it to the page offsets passed to
dax_direct_access().

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Fixes: 48debafe4f2f ("dm: add writecache target")
Cc: stable@vger.kernel.org # 4.18+
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
 drivers/md/dm-writecache.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index 86dbe0c8b45c6..6271d1e741cf7 100644
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -231,6 +231,7 @@ static int persistent_memory_claim(struct dm_writecache *wc)
 	pfn_t pfn;
 	int id;
 	struct page **pages;
+	sector_t offset;
 
 	wc->memory_vmapped = false;
 
@@ -245,9 +246,16 @@ static int persistent_memory_claim(struct dm_writecache *wc)
 		goto err1;
 	}
 
+	offset = get_start_sect(wc->ssd_dev->bdev);
+	if (offset & (PAGE_SIZE / 512 - 1)) {
+		r = -EINVAL;
+		goto err1;
+	}
+	offset >>= PAGE_SHIFT - 9;
+
 	id = dax_read_lock();
 
-	da = dax_direct_access(wc->ssd_dev->dax_dev, 0, p, &wc->memory_map, &pfn);
+	da = dax_direct_access(wc->ssd_dev->dax_dev, offset, p, &wc->memory_map, &pfn);
 	if (da < 0) {
 		wc->memory_map = NULL;
 		r = da;
@@ -269,7 +277,7 @@ static int persistent_memory_claim(struct dm_writecache *wc)
 		i = 0;
 		do {
 			long daa;
-			daa = dax_direct_access(wc->ssd_dev->dax_dev, i, p - i,
+			daa = dax_direct_access(wc->ssd_dev->dax_dev, offset + i, p - i,
 						NULL, &pfn);
 			if (daa <= 0) {
 				r = daa ? daa : -EINVAL;
-- 
GitLab


From c322ee9320eaa4013ca3620b1130992916b19b31 Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@redhat.com>
Date: Mon, 24 Aug 2020 14:19:55 -0400
Subject: [PATCH 0911/1341] dm mpath: fix racey management of PG initialization

Commit 935fcc56abc3 ("dm mpath: only flush workqueue when needed")
changed flush_multipath_work() to avoid needless workqueue
flushing (of a multipath global workqueue). But that change didn't
realize the surrounding flush_multipath_work() code should also only
run if 'pg_init_in_progress' is set.

Fix this by only doing all of flush_multipath_work()'s PG init related
work if 'pg_init_in_progress' is set.

Otherwise multipath_wait_for_pg_init_completion() will run
unconditionally but the preceeding flush_workqueue(kmpath_handlerd)
may not. This could lead to deadlock (though only if kmpath_handlerd
never runs a corresponding work to decrement 'pg_init_in_progress').

It could also be, though highly unlikely, that the kmpath_handlerd
work that does PG init completes before 'pg_init_in_progress' is set,
and then an intervening DM table reload's multipath_postsuspend()
triggers flush_multipath_work().

Fixes: 935fcc56abc3 ("dm mpath: only flush workqueue when needed")
Cc: stable@vger.kernel.org
Reported-by: Ben Marzinski <bmarzins@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
 drivers/md/dm-mpath.c | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index e3283d35c7fdb..de4da825ade60 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1287,17 +1287,25 @@ static void multipath_wait_for_pg_init_completion(struct multipath *m)
 static void flush_multipath_work(struct multipath *m)
 {
 	if (m->hw_handler_name) {
-		set_bit(MPATHF_PG_INIT_DISABLED, &m->flags);
-		smp_mb__after_atomic();
+		unsigned long flags;
+
+		if (!atomic_read(&m->pg_init_in_progress))
+			goto skip;
+
+		spin_lock_irqsave(&m->lock, flags);
+		if (atomic_read(&m->pg_init_in_progress) &&
+		    !test_and_set_bit(MPATHF_PG_INIT_DISABLED, &m->flags)) {
+			spin_unlock_irqrestore(&m->lock, flags);
 
-		if (atomic_read(&m->pg_init_in_progress))
 			flush_workqueue(kmpath_handlerd);
-		multipath_wait_for_pg_init_completion(m);
+			multipath_wait_for_pg_init_completion(m);
 
-		clear_bit(MPATHF_PG_INIT_DISABLED, &m->flags);
-		smp_mb__after_atomic();
+			spin_lock_irqsave(&m->lock, flags);
+			clear_bit(MPATHF_PG_INIT_DISABLED, &m->flags);
+		}
+		spin_unlock_irqrestore(&m->lock, flags);
 	}
-
+skip:
 	if (m->queue_mode == DM_TYPE_BIO_BASED)
 		flush_work(&m->process_queued_bios);
 	flush_work(&m->trigger_event);
-- 
GitLab


From 7785a9e4c228db6d01086a52d5685cd7336a08b7 Mon Sep 17 00:00:00 2001
From: Damien Le Moal <damien.lemoal@wdc.com>
Date: Mon, 31 Aug 2020 14:55:55 +0900
Subject: [PATCH 0912/1341] dm crypt: Initialize crypto wait structures

Use the DECLARE_CRYPTO_WAIT() macro to properly initialize the crypto
wait structures declared on stack before their use with
crypto_wait_req().

Fixes: 39d13a1ac41d ("dm crypt: reuse eboiv skcipher for IV generation")
Fixes: bbb1658461ac ("dm crypt: Implement Elephant diffuser for Bitlocker compatibility")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
 drivers/md/dm-crypt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c
index 238cd80826a69..380386c36921f 100644
--- a/drivers/md/dm-crypt.c
+++ b/drivers/md/dm-crypt.c
@@ -739,7 +739,7 @@ static int crypt_iv_eboiv_gen(struct crypt_config *cc, u8 *iv,
 	u8 buf[MAX_CIPHER_BLOCKSIZE] __aligned(__alignof__(__le64));
 	struct skcipher_request *req;
 	struct scatterlist src, dst;
-	struct crypto_wait wait;
+	DECLARE_CRYPTO_WAIT(wait);
 	int err;
 
 	req = skcipher_request_alloc(any_tfm(cc), GFP_NOIO);
@@ -936,7 +936,7 @@ static int crypt_iv_elephant(struct crypt_config *cc, struct dm_crypt_request *d
 	u8 *es, *ks, *data, *data2, *data_offset;
 	struct skcipher_request *req;
 	struct scatterlist *sg, *sg2, src, dst;
-	struct crypto_wait wait;
+	DECLARE_CRYPTO_WAIT(wait);
 	int i, r;
 
 	req = skcipher_request_alloc(elephant->tfm, GFP_NOIO);
-- 
GitLab


From e27fec66f0a94e35a35548bd0b29ae616e62ec62 Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@redhat.com>
Date: Mon, 31 Aug 2020 09:25:41 -0400
Subject: [PATCH 0913/1341] dm integrity: fix error reporting in bitmap mode
 after creation

The dm-integrity target did not report errors in bitmap mode just after
creation. The reason is that the function integrity_recalc didn't clean up
ic->recalc_bitmap as it proceeded with recalculation.

Fix this by updating the bitmap accordingly -- the double shift serves
to rounddown.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Fixes: 468dfca38b1a ("dm integrity: add a bitmap mode")
Cc: stable@vger.kernel.org # v5.2+
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
 drivers/md/dm-integrity.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 8c8d940e532ef..3fc3757def55e 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -2487,6 +2487,7 @@ static void integrity_recalc(struct work_struct *w)
 	range.logical_sector = le64_to_cpu(ic->sb->recalc_sector);
 	if (unlikely(range.logical_sector >= ic->provided_data_sectors)) {
 		if (ic->mode == 'B') {
+			block_bitmap_op(ic, ic->recalc_bitmap, 0, ic->provided_data_sectors, BITMAP_OP_CLEAR);
 			DEBUG_print("queue_delayed_work: bitmap_flush_work\n");
 			queue_delayed_work(ic->commit_wq, &ic->bitmap_flush_work, 0);
 		}
@@ -2564,6 +2565,17 @@ static void integrity_recalc(struct work_struct *w)
 		goto err;
 	}
 
+	if (ic->mode == 'B') {
+		sector_t start, end;
+		start = (range.logical_sector >>
+			 (ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit)) <<
+			(ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit);
+		end = ((range.logical_sector + range.n_sectors) >>
+		       (ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit)) <<
+			(ic->sb->log2_sectors_per_block + ic->log2_blocks_per_bitmap_bit);
+		block_bitmap_op(ic, ic->recalc_bitmap, start, end - start, BITMAP_OP_CLEAR);
+	}
+
 advance_and_next:
 	cond_resched();
 
-- 
GitLab


From ae6961de541d2307076d02fe9ae31f25c9f13611 Mon Sep 17 00:00:00 2001
From: Yunsheng Lin <linyunsheng@huawei.com>
Date: Tue, 1 Sep 2020 10:39:09 +0800
Subject: [PATCH 0914/1341] vhost: fix typo in error message

"enable" should be "disable" when the function name is
vhost_disable_notify(), which does the disabling work.

Signed-off-by: Yunsheng Lin <linyunsheng@huawei.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/vhost/vhost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 5857d4eec9d73..b45519ca66a7e 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -2537,7 +2537,7 @@ void vhost_disable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
 	if (!vhost_has_feature(vq, VIRTIO_RING_F_EVENT_IDX)) {
 		r = vhost_update_used_flags(vq);
 		if (r)
-			vq_err(vq, "Failed to enable notification at %p: %d\n",
+			vq_err(vq, "Failed to disable notification at %p: %d\n",
 			       &vq->used->flags, r);
 	}
 }
-- 
GitLab


From a609d0259183a841621f252e067f40f8cc25d6f6 Mon Sep 17 00:00:00 2001
From: Kamil Lorenc <kamil@re-ws.pl>
Date: Tue, 1 Sep 2020 10:57:38 +0200
Subject: [PATCH 0915/1341] net: usb: dm9601: Add USB ID of Keenetic Plus DSL

Keenetic Plus DSL is a xDSL modem that uses dm9620 as its USB interface.

Signed-off-by: Kamil Lorenc <kamil@re-ws.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/usb/dm9601.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c
index b91f92e4e5f22..915ac75b55fc7 100644
--- a/drivers/net/usb/dm9601.c
+++ b/drivers/net/usb/dm9601.c
@@ -625,6 +625,10 @@ static const struct usb_device_id products[] = {
 	 USB_DEVICE(0x0a46, 0x1269),	/* DM9621A USB to Fast Ethernet Adapter */
 	 .driver_info = (unsigned long)&dm9601_info,
 	},
+	{
+	 USB_DEVICE(0x0586, 0x3427),	/* ZyXEL Keenetic Plus DSL xDSL modem */
+	 .driver_info = (unsigned long)&dm9601_info,
+	},
 	{},			// END
 };
 
-- 
GitLab


From 5aeac7c4b16069aae49005f0a8d4526baa83341b Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Tue, 1 Sep 2020 14:52:31 -0400
Subject: [PATCH 0916/1341] blk-iocost: ioc_pd_free() shouldn't assume irq
 disabled

ioc_pd_free() grabs irq-safe ioc->lock without ensuring that irq is disabled
when it can be called with irq disabled or enabled. This has a small chance
of causing A-A deadlocks and triggers lockdep splats. Use irqsave operations
instead.

Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: 7caa47151ab2 ("blkcg: implement blk-iocost")
Cc: stable@vger.kernel.org # v5.4+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-iocost.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 413e0b5c8e6b0..d37b55db24099 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -2092,14 +2092,15 @@ static void ioc_pd_free(struct blkg_policy_data *pd)
 {
 	struct ioc_gq *iocg = pd_to_iocg(pd);
 	struct ioc *ioc = iocg->ioc;
+	unsigned long flags;
 
 	if (ioc) {
-		spin_lock(&ioc->lock);
+		spin_lock_irqsave(&ioc->lock, flags);
 		if (!list_empty(&iocg->active_list)) {
 			propagate_active_weight(iocg, 0, 0);
 			list_del_init(&iocg->active_list);
 		}
-		spin_unlock(&ioc->lock);
+		spin_unlock_irqrestore(&ioc->lock, flags);
 
 		hrtimer_cancel(&iocg->waitq_timer);
 		hrtimer_cancel(&iocg->delay_timer);
-- 
GitLab


From e11d80a849e010f78243bb6f6af7dccef3a71a90 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Tue, 1 Sep 2020 14:52:32 -0400
Subject: [PATCH 0917/1341] blk-stat: make q->stats->lock irqsafe

blk-iocost calls blk_stat_enable_accounting() while holding an irqsafe lock
which triggers a lockdep splat because q->stats->lock isn't irqsafe. Let's
make it irqsafe.

Signed-off-by: Tejun Heo <tj@kernel.org>
Fixes: cd006509b0a9 ("blk-iocost: account for IO size when testing latencies")
Cc: stable@vger.kernel.org # v5.8+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/blk-stat.c | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/block/blk-stat.c b/block/blk-stat.c
index 7da302ff88d0d..ae3dd1fb8e61d 100644
--- a/block/blk-stat.c
+++ b/block/blk-stat.c
@@ -137,6 +137,7 @@ void blk_stat_add_callback(struct request_queue *q,
 			   struct blk_stat_callback *cb)
 {
 	unsigned int bucket;
+	unsigned long flags;
 	int cpu;
 
 	for_each_possible_cpu(cpu) {
@@ -147,20 +148,22 @@ void blk_stat_add_callback(struct request_queue *q,
 			blk_rq_stat_init(&cpu_stat[bucket]);
 	}
 
-	spin_lock(&q->stats->lock);
+	spin_lock_irqsave(&q->stats->lock, flags);
 	list_add_tail_rcu(&cb->list, &q->stats->callbacks);
 	blk_queue_flag_set(QUEUE_FLAG_STATS, q);
-	spin_unlock(&q->stats->lock);
+	spin_unlock_irqrestore(&q->stats->lock, flags);
 }
 
 void blk_stat_remove_callback(struct request_queue *q,
 			      struct blk_stat_callback *cb)
 {
-	spin_lock(&q->stats->lock);
+	unsigned long flags;
+
+	spin_lock_irqsave(&q->stats->lock, flags);
 	list_del_rcu(&cb->list);
 	if (list_empty(&q->stats->callbacks) && !q->stats->enable_accounting)
 		blk_queue_flag_clear(QUEUE_FLAG_STATS, q);
-	spin_unlock(&q->stats->lock);
+	spin_unlock_irqrestore(&q->stats->lock, flags);
 
 	del_timer_sync(&cb->timer);
 }
@@ -183,10 +186,12 @@ void blk_stat_free_callback(struct blk_stat_callback *cb)
 
 void blk_stat_enable_accounting(struct request_queue *q)
 {
-	spin_lock(&q->stats->lock);
+	unsigned long flags;
+
+	spin_lock_irqsave(&q->stats->lock, flags);
 	q->stats->enable_accounting = true;
 	blk_queue_flag_set(QUEUE_FLAG_STATS, q);
-	spin_unlock(&q->stats->lock);
+	spin_unlock_irqrestore(&q->stats->lock, flags);
 }
 EXPORT_SYMBOL_GPL(blk_stat_enable_accounting);
 
-- 
GitLab


From 5528d03183fe5243416c706f64b1faa518b05130 Mon Sep 17 00:00:00 2001
From: Varun Prakash <varun@chelsio.com>
Date: Tue, 25 Aug 2020 18:05:10 +0530
Subject: [PATCH 0918/1341] scsi: target: iscsi: Fix data digest calculation

Current code does not consider 'page_off' in data digest calculation. To
fix this, add a local variable 'first_sg' and set first_sg.offset to
sg->offset + page_off.

Link: https://lore.kernel.org/r/1598358910-3052-1-git-send-email-varun@chelsio.com
Fixes: e48354ce078c ("iscsi-target: Add iSCSI fabric support for target v4.1")
Cc: <stable@vger.kernel.org>
Reviewed-by: Mike Christie <michael.christie@oralce.com>
Signed-off-by: Varun Prakash <varun@chelsio.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/target/iscsi/iscsi_target.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/target/iscsi/iscsi_target.c b/drivers/target/iscsi/iscsi_target.c
index c9689610e186d..2ec778e97b1be 100644
--- a/drivers/target/iscsi/iscsi_target.c
+++ b/drivers/target/iscsi/iscsi_target.c
@@ -1389,14 +1389,27 @@ static u32 iscsit_do_crypto_hash_sg(
 	sg = cmd->first_data_sg;
 	page_off = cmd->first_data_sg_off;
 
+	if (data_length && page_off) {
+		struct scatterlist first_sg;
+		u32 len = min_t(u32, data_length, sg->length - page_off);
+
+		sg_init_table(&first_sg, 1);
+		sg_set_page(&first_sg, sg_page(sg), len, sg->offset + page_off);
+
+		ahash_request_set_crypt(hash, &first_sg, NULL, len);
+		crypto_ahash_update(hash);
+
+		data_length -= len;
+		sg = sg_next(sg);
+	}
+
 	while (data_length) {
-		u32 cur_len = min_t(u32, data_length, (sg->length - page_off));
+		u32 cur_len = min_t(u32, data_length, sg->length);
 
 		ahash_request_set_crypt(hash, sg, NULL, cur_len);
 		crypto_ahash_update(hash);
 
 		data_length -= cur_len;
-		page_off = 0;
 		/* iscsit_map_iovec has already checked for invalid sg pointers */
 		sg = sg_next(sg);
 	}
-- 
GitLab


From 53de092f47ff40e8d4d78d590d95819d391bf2e0 Mon Sep 17 00:00:00 2001
From: Luo Jiaxing <luojiaxing@huawei.com>
Date: Wed, 26 Aug 2020 15:24:26 +0800
Subject: [PATCH 0919/1341] scsi: libsas: Set data_dir as DMA_NONE if libata
 marks qc as NODATA

It was discovered that sdparm will fail when attempting to disable write
cache on a SATA disk connected via libsas.

In the ATA command set the write cache state is controlled through the SET
FEATURES operation. This is roughly corresponds to MODE SELECT in SCSI and
the latter command is what is used in the SCSI-ATA translation layer. A
subtle difference is that a MODE SELECT carries data whereas SET FEATURES
is defined as a non-data command in ATA.

Set the DMA data direction to DMA_NONE if the requested ATA command is
identified as non-data.

[mkp: commit desc]

Fixes: fa1c1e8f1ece ("[SCSI] Add SATA support to libsas")
Link: https://lore.kernel.org/r/1598426666-54544-1-git-send-email-luojiaxing@huawei.com
Reviewed-by: John Garry <john.garry@huawei.com>
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/libsas/sas_ata.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/libsas/sas_ata.c b/drivers/scsi/libsas/sas_ata.c
index 1b93332daa6b3..8b424c8ab834f 100644
--- a/drivers/scsi/libsas/sas_ata.c
+++ b/drivers/scsi/libsas/sas_ata.c
@@ -209,7 +209,10 @@ static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
 		task->num_scatter = si;
 	}
 
-	task->data_dir = qc->dma_dir;
+	if (qc->tf.protocol == ATA_PROT_NODATA)
+		task->data_dir = DMA_NONE;
+	else
+		task->data_dir = qc->dma_dir;
 	task->scatter = qc->sg;
 	task->ata_task.retry_count = 1;
 	task->task_state_flags = SAS_TASK_STATE_PENDING;
-- 
GitLab


From c6016c6e39c3ee8fd671532520be3cc13e439db2 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue, 18 Aug 2020 09:25:10 +0200
Subject: [PATCH 0920/1341] drm/virtio: fix unblank

When going through a disable/enable cycle without changing the
framebuffer the optimization added by commit 3954ff10e06e ("drm/virtio:
skip set_scanout if framebuffer didn't change") causes the screen stay
blank.  Add a bool to force an update to fix that.

v2: use drm_atomic_crtc_needs_modeset() (Daniel).

Cc: 1882851@bugs.launchpad.net
Fixes: 3954ff10e06e ("drm/virtio: skip set_scanout if framebuffer didn't change")
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Jiri Slaby <jirislaby@kernel.org>
Tested-by: Diego Viola <diego.viola@gmail.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20200818072511.6745-2-kraxel@redhat.com
(cherry picked from commit 1bc371cd0ec907bab870cacb6e898105f9c41dc8)
---
 drivers/gpu/drm/virtio/virtgpu_display.c | 11 +++++++++++
 drivers/gpu/drm/virtio/virtgpu_drv.h     |  1 +
 drivers/gpu/drm/virtio/virtgpu_plane.c   |  4 +++-
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index af55b334be2fd..97170998cd0e4 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -123,6 +123,17 @@ static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
 static void virtio_gpu_crtc_atomic_flush(struct drm_crtc *crtc,
 					 struct drm_crtc_state *old_state)
 {
+	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
+
+	/*
+	 * virtio-gpu can't do modeset and plane update operations
+	 * independent from each other.  So the actual modeset happens
+	 * in the plane update callback, and here we just check
+	 * whenever we must force the modeset.
+	 */
+	if (drm_atomic_crtc_needs_modeset(crtc->state)) {
+		output->needs_modeset = true;
+	}
 }
 
 static const struct drm_crtc_helper_funcs virtio_gpu_crtc_helper_funcs = {
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 9ff9f4ac0522a..4ab1b0ba29253 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -138,6 +138,7 @@ struct virtio_gpu_output {
 	int cur_x;
 	int cur_y;
 	bool enabled;
+	bool needs_modeset;
 };
 #define drm_crtc_to_virtio_gpu_output(x) \
 	container_of(x, struct virtio_gpu_output, crtc)
diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c
index 52d24179bcecc..65757409d9ed1 100644
--- a/drivers/gpu/drm/virtio/virtgpu_plane.c
+++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
@@ -163,7 +163,9 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
 	    plane->state->src_w != old_state->src_w ||
 	    plane->state->src_h != old_state->src_h ||
 	    plane->state->src_x != old_state->src_x ||
-	    plane->state->src_y != old_state->src_y) {
+	    plane->state->src_y != old_state->src_y ||
+	    output->needs_modeset) {
+		output->needs_modeset = false;
 		DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n",
 			  bo->hw_res_handle,
 			  plane->state->crtc_w, plane->state->crtc_h,
-- 
GitLab


From 60295d50958e21da1df7311fd3c6aced1b3f1f04 Mon Sep 17 00:00:00 2001
From: Sudeep Holla <sudeep.holla@arm.com>
Date: Tue, 1 Sep 2020 10:52:29 +0100
Subject: [PATCH 0921/1341] arm64: Remove exporting cpu_logical_map symbol

Commit eaecca9e7710 ("arm64: Fix __cpu_logical_map undefined issue")
exported cpu_logical_map in order to fix tegra194-cpufreq module build
failure.

As this might potentially cause problem while supporting physical CPU
hotplug, tegra194-cpufreq module was reworded to avoid use of
cpu_logical_map() via the commit 93d0c1ab2328 ("cpufreq: replace
cpu_logical_map() with read_cpuid_mpir()")

Since cpu_logical_map was exported to fix the module build temporarily,
let us remove the same before it gains any user again.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Link: https://lore.kernel.org/r/20200901095229.56793-1-sudeep.holla@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/setup.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 77c4c9bad1b85..53acbeca4f574 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -280,7 +280,6 @@ u64 cpu_logical_map(int cpu)
 {
 	return __cpu_logical_map[cpu];
 }
-EXPORT_SYMBOL_GPL(cpu_logical_map);
 
 void __init __no_sanitize_address setup_arch(char **cmdline_p)
 {
-- 
GitLab


From e0328feda79d9681b3e3245e6e180295550c8ee9 Mon Sep 17 00:00:00 2001
From: Jessica Yu <jeyu@kernel.org>
Date: Tue, 1 Sep 2020 18:00:16 +0200
Subject: [PATCH 0922/1341] arm64/module: set trampoline section flags
 regardless of CONFIG_DYNAMIC_FTRACE

In the arm64 module linker script, the section .text.ftrace_trampoline
is specified unconditionally regardless of whether CONFIG_DYNAMIC_FTRACE
is enabled (this is simply due to the limitation that module linker
scripts are not preprocessed like the vmlinux one).

Normally, for .plt and .text.ftrace_trampoline, the section flags
present in the module binary wouldn't matter since module_frob_arch_sections()
would assign them manually anyway. However, the arm64 module loader only
sets the section flags for .text.ftrace_trampoline when CONFIG_DYNAMIC_FTRACE=y.
That's only become problematic recently due to a recent change in
binutils-2.35, where the .text.ftrace_trampoline section (along with the
.plt section) is now marked writable and executable (WAX).

We no longer allow writable and executable sections to be loaded due to
commit 5c3a7db0c7ec ("module: Harden STRICT_MODULE_RWX"), so this is
causing all modules linked with binutils-2.35 to be rejected under arm64.
Drop the IS_ENABLED(CONFIG_DYNAMIC_FTRACE) check in module_frob_arch_sections()
so that the section flags for .text.ftrace_trampoline get properly set to
SHF_EXECINSTR|SHF_ALLOC, without SHF_WRITE.

Signed-off-by: Jessica Yu <jeyu@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: http://lore.kernel.org/r/20200831094651.GA16385@linux-8ccs
Link: https://lore.kernel.org/r/20200901160016.3646-1-jeyu@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/module-plts.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/module-plts.c b/arch/arm64/kernel/module-plts.c
index 0ce3a28e33479..2e224435c0249 100644
--- a/arch/arm64/kernel/module-plts.c
+++ b/arch/arm64/kernel/module-plts.c
@@ -305,8 +305,7 @@ int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
 			mod->arch.core.plt_shndx = i;
 		else if (!strcmp(secstrings + sechdrs[i].sh_name, ".init.plt"))
 			mod->arch.init.plt_shndx = i;
-		else if (IS_ENABLED(CONFIG_DYNAMIC_FTRACE) &&
-			 !strcmp(secstrings + sechdrs[i].sh_name,
+		else if (!strcmp(secstrings + sechdrs[i].sh_name,
 				 ".text.ftrace_trampoline"))
 			tramp = sechdrs + i;
 		else if (sechdrs[i].sh_type == SHT_SYMTAB)
-- 
GitLab


From 6baa2e0c8ab89664285bb0780bfd39276bc27a88 Mon Sep 17 00:00:00 2001
From: Nathan Chancellor <natechancellor@gmail.com>
Date: Fri, 28 Aug 2020 13:28:30 -0700
Subject: [PATCH 0923/1341] drm/i915/display: Ensure that ret is always
 initialized in icl_combo_phy_verify_state
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Clang warns:

drivers/gpu/drm/i915/display/intel_combo_phy.c:268:3: warning: variable
'ret' is uninitialized when used here [-Wuninitialized]
                ret &= check_phy_reg(dev_priv, phy, ICL_PORT_TX_DW8_LN0(phy),
                ^~~
drivers/gpu/drm/i915/display/intel_combo_phy.c:261:10: note: initialize
the variable 'ret' to silence this warning
        bool ret;
                ^
                 = 0
1 warning generated.

In practice, the bug this warning appears to be concerned with would not
actually matter because ret gets initialized to the return value of
cnl_verify_procmon_ref_values. However, that does appear to be a bug
since it means the first hunk of the patch this fixes won't actually do
anything (since the values of check_phy_reg won't factor into the final
ret value). Initialize ret to true then make all of the assignments a
bitwise AND with itself so that the function always does what it should
do.

Fixes: 239bef676d8e ("drm/i915/display: Implement new combo phy initialization step")
Link: https://github.com/ClangBuiltLinux/linux/issues/1094
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200828202830.7165-1-jose.souza@intel.com
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
(cherry picked from commit 2034c2129bc4a91d471815d4dc7a2a69eaa5338d)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_combo_phy.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_combo_phy.c b/drivers/gpu/drm/i915/display/intel_combo_phy.c
index 6968de4f34779..157d8c8c605a1 100644
--- a/drivers/gpu/drm/i915/display/intel_combo_phy.c
+++ b/drivers/gpu/drm/i915/display/intel_combo_phy.c
@@ -258,7 +258,7 @@ static bool phy_is_master(struct drm_i915_private *dev_priv, enum phy phy)
 static bool icl_combo_phy_verify_state(struct drm_i915_private *dev_priv,
 				       enum phy phy)
 {
-	bool ret;
+	bool ret = true;
 	u32 expected_val = 0;
 
 	if (!icl_combo_phy_enabled(dev_priv, phy))
@@ -276,7 +276,7 @@ static bool icl_combo_phy_verify_state(struct drm_i915_private *dev_priv,
 				     DCC_MODE_SELECT_CONTINUOSLY);
 	}
 
-	ret = cnl_verify_procmon_ref_values(dev_priv, phy);
+	ret &= cnl_verify_procmon_ref_values(dev_priv, phy);
 
 	if (phy_is_master(dev_priv, phy)) {
 		ret &= check_phy_reg(dev_priv, phy, ICL_PORT_COMP_DW8(phy),
-- 
GitLab


From 9ab57658a608f879469ffa22b723c4539c05a58f Mon Sep 17 00:00:00 2001
From: Sean Paul <seanpaul@chromium.org>
Date: Tue, 18 Aug 2020 11:38:49 -0400
Subject: [PATCH 0924/1341] drm/i915: Fix sha_text population code

This patch fixes a few bugs:

1- We weren't taking into account sha_leftovers when adding multiple
   ksvs to sha_text. As such, we were or'ing the end of ksv[j - 1] with
   the beginning of ksv[j]

2- In the sha_leftovers == 2 and sha_leftovers == 3 case, bstatus was
   being placed on the wrong half of sha_text, overlapping the leftover
   ksv value

3- In the sha_leftovers == 2 case, we need to manually terminate the
   byte stream with 0x80 since the hardware doesn't have enough room to
   add it after writing M0

The upside is that all of the HDCP supported HDMI repeaters I could
find on Amazon just strip HDCP anyways, so it turns out to be _really_
hard to hit any of these cases without an MST hub, which is not (yet)
supported. Oh, and the sha_leftovers == 1 case works perfectly!

Fixes: ee5e5e7a5e0f ("drm/i915: Add HDCP framework + base implementation")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ramalingam C <ramalingam.c@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.17+
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200818153910.27894-2-sean@poorly.run
(cherry picked from commit 1f0882214fd0037b74f245d9be75c31516fed040)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_hdcp.c | 26 +++++++++++++++++------
 include/drm/drm_hdcp.h                    |  3 +++
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 89a4d294822d5..6189b7583277c 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -336,8 +336,10 @@ int intel_hdcp_validate_v_prime(struct intel_connector *connector,
 
 		/* Fill up the empty slots in sha_text and write it out */
 		sha_empty = sizeof(sha_text) - sha_leftovers;
-		for (j = 0; j < sha_empty; j++)
-			sha_text |= ksv[j] << ((sizeof(sha_text) - j - 1) * 8);
+		for (j = 0; j < sha_empty; j++) {
+			u8 off = ((sizeof(sha_text) - j - 1 - sha_leftovers) * 8);
+			sha_text |= ksv[j] << off;
+		}
 
 		ret = intel_write_sha_text(dev_priv, sha_text);
 		if (ret < 0)
@@ -435,7 +437,7 @@ int intel_hdcp_validate_v_prime(struct intel_connector *connector,
 		/* Write 32 bits of text */
 		intel_de_write(dev_priv, HDCP_REP_CTL,
 			       rep_ctl | HDCP_SHA1_TEXT_32);
-		sha_text |= bstatus[0] << 24 | bstatus[1] << 16;
+		sha_text |= bstatus[0] << 8 | bstatus[1];
 		ret = intel_write_sha_text(dev_priv, sha_text);
 		if (ret < 0)
 			return ret;
@@ -450,17 +452,29 @@ int intel_hdcp_validate_v_prime(struct intel_connector *connector,
 				return ret;
 			sha_idx += sizeof(sha_text);
 		}
+
+		/*
+		 * Terminate the SHA-1 stream by hand. For the other leftover
+		 * cases this is appended by the hardware.
+		 */
+		intel_de_write(dev_priv, HDCP_REP_CTL,
+			       rep_ctl | HDCP_SHA1_TEXT_32);
+		sha_text = DRM_HDCP_SHA1_TERMINATOR << 24;
+		ret = intel_write_sha_text(dev_priv, sha_text);
+		if (ret < 0)
+			return ret;
+		sha_idx += sizeof(sha_text);
 	} else if (sha_leftovers == 3) {
-		/* Write 32 bits of text */
+		/* Write 32 bits of text (filled from LSB) */
 		intel_de_write(dev_priv, HDCP_REP_CTL,
 			       rep_ctl | HDCP_SHA1_TEXT_32);
-		sha_text |= bstatus[0] << 24;
+		sha_text |= bstatus[0];
 		ret = intel_write_sha_text(dev_priv, sha_text);
 		if (ret < 0)
 			return ret;
 		sha_idx += sizeof(sha_text);
 
-		/* Write 8 bits of text, 24 bits of M0 */
+		/* Write 8 bits of text (filled from LSB), 24 bits of M0 */
 		intel_de_write(dev_priv, HDCP_REP_CTL,
 			       rep_ctl | HDCP_SHA1_TEXT_8);
 		ret = intel_write_sha_text(dev_priv, bstatus[1]);
diff --git a/include/drm/drm_hdcp.h b/include/drm/drm_hdcp.h
index c6bab4986a658..fe58dbb46962a 100644
--- a/include/drm/drm_hdcp.h
+++ b/include/drm/drm_hdcp.h
@@ -29,6 +29,9 @@
 /* Slave address for the HDCP registers in the receiver */
 #define DRM_HDCP_DDC_ADDR			0x3A
 
+/* Value to use at the end of the SHA-1 bytestream used for repeaters */
+#define DRM_HDCP_SHA1_TERMINATOR		0x80
+
 /* HDCP register offsets for HDMI/DVI devices */
 #define DRM_HDCP_DDC_BKSV			0x00
 #define DRM_HDCP_DDC_RI_PRIME			0x08
-- 
GitLab


From 57537b4e1d37002ed8cbd0a9be082104749e9d8f Mon Sep 17 00:00:00 2001
From: Sean Paul <seanpaul@chromium.org>
Date: Tue, 18 Aug 2020 11:38:50 -0400
Subject: [PATCH 0925/1341] drm/i915: Clear the repeater bit on HDCP disable

On HDCP disable, clear the repeater bit. This ensures if we connect a
non-repeater sink after a repeater, the bit is in the state we expect.

Fixes: ee5e5e7a5e0f ("drm/i915: Add HDCP framework + base implementation")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Ramalingam C <ramalingam.c@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v4.17+
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200818153910.27894-3-sean@poorly.run
(cherry picked from commit 2cc0c7b520bf8ea20ec42285d4e3d37b467eb7f9)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_hdcp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c
index 6189b7583277c..1a0d49af2a086 100644
--- a/drivers/gpu/drm/i915/display/intel_hdcp.c
+++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
@@ -795,6 +795,7 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
 	struct intel_hdcp *hdcp = &connector->hdcp;
 	enum port port = dig_port->base.port;
 	enum transcoder cpu_transcoder = hdcp->cpu_transcoder;
+	u32 repeater_ctl;
 	int ret;
 
 	drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP is being disabled...\n",
@@ -810,6 +811,11 @@ static int _intel_hdcp_disable(struct intel_connector *connector)
 		return -ETIMEDOUT;
 	}
 
+	repeater_ctl = intel_hdcp_get_repeater_ctl(dev_priv, cpu_transcoder,
+						   port);
+	intel_de_write(dev_priv, HDCP_REP_CTL,
+		       intel_de_read(dev_priv, HDCP_REP_CTL) & ~repeater_ctl);
+
 	ret = hdcp->shim->toggle_signalling(dig_port, false);
 	if (ret) {
 		drm_err(&dev_priv->drm, "Failed to disable HDCP signalling\n");
-- 
GitLab


From 114b9df419bf5db097b322ebb03fcf2f502f9380 Mon Sep 17 00:00:00 2001
From: Eric Farman <farman@linux.ibm.com>
Date: Tue, 25 Aug 2020 03:59:39 +0200
Subject: [PATCH 0926/1341] s390: fix GENERIC_LOCKBREAK dependency typo in
 Kconfig

Commit fa686453053b ("sched/rt, s390: Use CONFIG_PREEMPTION")
changed a bunch of uses of CONFIG_PREEMPT to _PREEMPTION.
Except in the Kconfig it used two T's. That's the only place
in the system where that spelling exists, so let's fix that.

Fixes: fa686453053b ("sched/rt, s390: Use CONFIG_PREEMPTION")
Cc: <stable@vger.kernel.org> # 5.6
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 arch/s390/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 3d86e12e8e3c2..b29fcc66ec39b 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -30,7 +30,7 @@ config GENERIC_BUG_RELATIVE_POINTERS
 	def_bool y
 
 config GENERIC_LOCKBREAK
-	def_bool y if PREEMPTTION
+	def_bool y if PREEMPTION
 
 config PGSTE
 	def_bool y if KVM
-- 
GitLab


From 5c60ed283e1d87e161441bb273541a948ee96f6a Mon Sep 17 00:00:00 2001
From: Heiko Carstens <hca@linux.ibm.com>
Date: Tue, 1 Sep 2020 20:39:29 +0200
Subject: [PATCH 0927/1341] s390: update defconfigs

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 arch/s390/configs/debug_defconfig    | 4 ++++
 arch/s390/configs/defconfig          | 3 +++
 arch/s390/configs/zfcpdump_defconfig | 1 +
 3 files changed, 8 insertions(+)

diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig
index 0cf9a82326a85..7228aabe9da61 100644
--- a/arch/s390/configs/debug_defconfig
+++ b/arch/s390/configs/debug_defconfig
@@ -626,6 +626,7 @@ CONFIG_NTFS_RW=y
 CONFIG_PROC_KCORE=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_TMPFS_INODE64=y
 CONFIG_HUGETLBFS=y
 CONFIG_CONFIGFS_FS=m
 CONFIG_ECRYPT_FS=m
@@ -807,6 +808,7 @@ CONFIG_DEBUG_NOTIFIERS=y
 CONFIG_BUG_ON_DATA_CORRUPTION=y
 CONFIG_DEBUG_CREDENTIALS=y
 CONFIG_RCU_TORTURE_TEST=m
+CONFIG_RCU_REF_SCALE_TEST=m
 CONFIG_RCU_CPU_STALL_TIMEOUT=300
 # CONFIG_RCU_TRACE is not set
 CONFIG_LATENCYTOP=y
@@ -818,6 +820,7 @@ CONFIG_PREEMPT_TRACER=y
 CONFIG_SCHED_TRACER=y
 CONFIG_FTRACE_SYSCALLS=y
 CONFIG_BLK_DEV_IO_TRACE=y
+CONFIG_BPF_KPROBE_OVERRIDE=y
 CONFIG_HIST_TRIGGERS=y
 CONFIG_S390_PTDUMP=y
 CONFIG_NOTIFIER_ERROR_INJECTION=m
@@ -829,6 +832,7 @@ CONFIG_FAIL_MAKE_REQUEST=y
 CONFIG_FAIL_IO_TIMEOUT=y
 CONFIG_FAIL_FUTEX=y
 CONFIG_FAULT_INJECTION_DEBUG_FS=y
+CONFIG_FAIL_FUNCTION=y
 CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y
 CONFIG_LKDTM=m
 CONFIG_TEST_LIST_SORT=y
diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig
index 5df9759e8ff67..fab03b7a69324 100644
--- a/arch/s390/configs/defconfig
+++ b/arch/s390/configs/defconfig
@@ -617,6 +617,7 @@ CONFIG_NTFS_RW=y
 CONFIG_PROC_KCORE=y
 CONFIG_TMPFS=y
 CONFIG_TMPFS_POSIX_ACL=y
+CONFIG_TMPFS_INODE64=y
 CONFIG_HUGETLBFS=y
 CONFIG_CONFIGFS_FS=m
 CONFIG_ECRYPT_FS=m
@@ -763,6 +764,7 @@ CONFIG_PANIC_ON_OOPS=y
 CONFIG_TEST_LOCKUP=m
 CONFIG_BUG_ON_DATA_CORRUPTION=y
 CONFIG_RCU_TORTURE_TEST=m
+CONFIG_RCU_REF_SCALE_TEST=m
 CONFIG_RCU_CPU_STALL_TIMEOUT=60
 CONFIG_LATENCYTOP=y
 CONFIG_BOOTTIME_TRACING=y
@@ -771,6 +773,7 @@ CONFIG_STACK_TRACER=y
 CONFIG_SCHED_TRACER=y
 CONFIG_FTRACE_SYSCALLS=y
 CONFIG_BLK_DEV_IO_TRACE=y
+CONFIG_BPF_KPROBE_OVERRIDE=y
 CONFIG_HIST_TRIGGERS=y
 CONFIG_S390_PTDUMP=y
 CONFIG_LKDTM=m
diff --git a/arch/s390/configs/zfcpdump_defconfig b/arch/s390/configs/zfcpdump_defconfig
index 4091c50449cd0..8f67c55625f9e 100644
--- a/arch/s390/configs/zfcpdump_defconfig
+++ b/arch/s390/configs/zfcpdump_defconfig
@@ -74,5 +74,6 @@ CONFIG_DEBUG_KERNEL=y
 CONFIG_PANIC_ON_OOPS=y
 # CONFIG_SCHED_DEBUG is not set
 CONFIG_RCU_CPU_STALL_TIMEOUT=60
+# CONFIG_RCU_TRACE is not set
 # CONFIG_FTRACE is not set
 # CONFIG_RUNTIME_TESTING_MENU is not set
-- 
GitLab


From d1a58aae6648031afcb2a93f5af8498037efe2cc Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:12 +0530
Subject: [PATCH 0928/1341] ALSA: core: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://lore.kernel.org/r/20200902040221.354941-2-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/core/timer.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/sound/core/timer.c b/sound/core/timer.c
index d9f85f2d66a3d..6e27d87b18ed6 100644
--- a/sound/core/timer.c
+++ b/sound/core/timer.c
@@ -816,9 +816,9 @@ static void snd_timer_clear_callbacks(struct snd_timer *timer,
  * timer tasklet
  *
  */
-static void snd_timer_tasklet(unsigned long arg)
+static void snd_timer_tasklet(struct tasklet_struct *t)
 {
-	struct snd_timer *timer = (struct snd_timer *) arg;
+	struct snd_timer *timer = from_tasklet(timer, t, task_queue);
 	unsigned long flags;
 
 	if (timer->card && timer->card->shutdown) {
@@ -967,8 +967,7 @@ int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid,
 	INIT_LIST_HEAD(&timer->ack_list_head);
 	INIT_LIST_HEAD(&timer->sack_list_head);
 	spin_lock_init(&timer->lock);
-	tasklet_init(&timer->task_queue, snd_timer_tasklet,
-		     (unsigned long)timer);
+	tasklet_setup(&timer->task_queue, snd_timer_tasklet);
 	timer->max_instances = 1000; /* default limit per timer */
 	if (card != NULL) {
 		timer->module = card->module;
-- 
GitLab


From 51bc581a21c420f71b4d78e5718efac2aaf854b1 Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:13 +0530
Subject: [PATCH 0929/1341] ALSA: firewire: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Acked-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20200902040221.354941-3-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/firewire/amdtp-stream.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index f8586f75441db..ee1c428b1fd36 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -64,7 +64,7 @@
 #define IT_PKT_HEADER_SIZE_CIP		8 // For 2 CIP header.
 #define IT_PKT_HEADER_SIZE_NO_CIP	0 // Nothing.
 
-static void pcm_period_tasklet(unsigned long data);
+static void pcm_period_tasklet(struct tasklet_struct *t);
 
 /**
  * amdtp_stream_init - initialize an AMDTP stream structure
@@ -94,7 +94,7 @@ int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
 	s->flags = flags;
 	s->context = ERR_PTR(-1);
 	mutex_init(&s->mutex);
-	tasklet_init(&s->period_tasklet, pcm_period_tasklet, (unsigned long)s);
+	tasklet_setup(&s->period_tasklet, pcm_period_tasklet);
 	s->packet_index = 0;
 
 	init_waitqueue_head(&s->callback_wait);
@@ -441,9 +441,9 @@ static void update_pcm_pointers(struct amdtp_stream *s,
 	}
 }
 
-static void pcm_period_tasklet(unsigned long data)
+static void pcm_period_tasklet(struct tasklet_struct *t)
 {
-	struct amdtp_stream *s = (void *)data;
+	struct amdtp_stream *s = from_tasklet(s, t, period_tasklet);
 	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 
 	if (pcm)
-- 
GitLab


From 70f8b2f12dc033b24e2932c2b196d1ca4a915417 Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:14 +0530
Subject: [PATCH 0930/1341] ALSA: pci/asihpi: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://lore.kernel.org/r/20200902040221.354941-4-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/asihpi/asihpi.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/sound/pci/asihpi/asihpi.c b/sound/pci/asihpi/asihpi.c
index 023c35a2a9513..35e76480306e7 100644
--- a/sound/pci/asihpi/asihpi.c
+++ b/sound/pci/asihpi/asihpi.c
@@ -921,10 +921,10 @@ static void snd_card_asihpi_timer_function(struct timer_list *t)
 		add_timer(&dpcm->timer);
 }
 
-static void snd_card_asihpi_int_task(unsigned long data)
+static void snd_card_asihpi_int_task(struct tasklet_struct *t)
 {
-	struct hpi_adapter *a = (struct hpi_adapter *)data;
-	struct snd_card_asihpi *asihpi;
+	struct snd_card_asihpi *asihpi = from_tasklet(asihpi, t, t);
+	struct hpi_adapter *a = asihpi->hpi;
 
 	WARN_ON(!a || !a->snd_card || !a->snd_card->private_data);
 	asihpi = (struct snd_card_asihpi *)a->snd_card->private_data;
@@ -2871,8 +2871,7 @@ static int snd_asihpi_probe(struct pci_dev *pci_dev,
 	if (hpi->interrupt_mode) {
 		asihpi->pcm_start = snd_card_asihpi_pcm_int_start;
 		asihpi->pcm_stop = snd_card_asihpi_pcm_int_stop;
-		tasklet_init(&asihpi->t, snd_card_asihpi_int_task,
-			(unsigned long)hpi);
+		tasklet_setup(&asihpi->t, snd_card_asihpi_int_task);
 		hpi->interrupt_callback = snd_card_asihpi_isr;
 	} else {
 		asihpi->pcm_start = snd_card_asihpi_pcm_timer_start;
-- 
GitLab


From c2082393d55487d30d1b307242135b2b442920a0 Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:15 +0530
Subject: [PATCH 0931/1341] ALSA: riptide: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://lore.kernel.org/r/20200902040221.354941-5-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/riptide/riptide.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/pci/riptide/riptide.c b/sound/pci/riptide/riptide.c
index b4f3002818227..098c69b3b7aae 100644
--- a/sound/pci/riptide/riptide.c
+++ b/sound/pci/riptide/riptide.c
@@ -1070,9 +1070,9 @@ getmixer(struct cmdif *cif, short num, unsigned short *rval,
 	return 0;
 }
 
-static void riptide_handleirq(unsigned long dev_id)
+static void riptide_handleirq(struct tasklet_struct *t)
 {
-	struct snd_riptide *chip = (void *)dev_id;
+	struct snd_riptide *chip = from_tasklet(chip, t, riptide_tq);
 	struct cmdif *cif = chip->cif;
 	struct snd_pcm_substream *substream[PLAYBACK_SUBSTREAMS + 1];
 	struct snd_pcm_runtime *runtime;
@@ -1843,7 +1843,7 @@ snd_riptide_create(struct snd_card *card, struct pci_dev *pci,
 	chip->received_irqs = 0;
 	chip->handled_irqs = 0;
 	chip->cif = NULL;
-	tasklet_init(&chip->riptide_tq, riptide_handleirq, (unsigned long)chip);
+	tasklet_setup(&chip->riptide_tq, riptide_handleirq);
 
 	if ((chip->res_port =
 	     request_region(chip->port, 64, "RIPTIDE")) == NULL) {
-- 
GitLab


From 1a1575a151478f336c473137c32b82a3933e402e Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:16 +0530
Subject: [PATCH 0932/1341] ALSA: hdsp: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://lore.kernel.org/r/20200902040221.354941-6-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/rme9652/hdsp.c  | 6 +++---
 sound/pci/rme9652/hdspm.c | 7 +++----
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/sound/pci/rme9652/hdsp.c b/sound/pci/rme9652/hdsp.c
index 227aece17e390..dda56ecfd33b9 100644
--- a/sound/pci/rme9652/hdsp.c
+++ b/sound/pci/rme9652/hdsp.c
@@ -3791,9 +3791,9 @@ static int snd_hdsp_set_defaults(struct hdsp *hdsp)
 	return 0;
 }
 
-static void hdsp_midi_tasklet(unsigned long arg)
+static void hdsp_midi_tasklet(struct tasklet_struct *t)
 {
-	struct hdsp *hdsp = (struct hdsp *)arg;
+	struct hdsp *hdsp = from_tasklet(hdsp, t, midi_tasklet);
 
 	if (hdsp->midi[0].pending)
 		snd_hdsp_midi_input_read (&hdsp->midi[0]);
@@ -5182,7 +5182,7 @@ static int snd_hdsp_create(struct snd_card *card,
 
 	spin_lock_init(&hdsp->lock);
 
-	tasklet_init(&hdsp->midi_tasklet, hdsp_midi_tasklet, (unsigned long)hdsp);
+	tasklet_setup(&hdsp->midi_tasklet, hdsp_midi_tasklet);
 
 	pci_read_config_word(hdsp->pci, PCI_CLASS_REVISION, &hdsp->firmware_rev);
 	hdsp->firmware_rev &= 0xff;
diff --git a/sound/pci/rme9652/hdspm.c b/sound/pci/rme9652/hdspm.c
index 0fa49f4d15cff..572350aaf18d0 100644
--- a/sound/pci/rme9652/hdspm.c
+++ b/sound/pci/rme9652/hdspm.c
@@ -2169,9 +2169,9 @@ static int snd_hdspm_create_midi(struct snd_card *card,
 }
 
 
-static void hdspm_midi_tasklet(unsigned long arg)
+static void hdspm_midi_tasklet(struct tasklet_struct *t)
 {
-	struct hdspm *hdspm = (struct hdspm *)arg;
+	struct hdspm *hdspm = from_tasklet(hdspm, t, midi_tasklet);
 	int i = 0;
 
 	while (i < hdspm->midiPorts) {
@@ -6836,8 +6836,7 @@ static int snd_hdspm_create(struct snd_card *card,
 
 	}
 
-	tasklet_init(&hdspm->midi_tasklet,
-			hdspm_midi_tasklet, (unsigned long) hdspm);
+	tasklet_setup(&hdspm->midi_tasklet, hdspm_midi_tasklet);
 
 
 	if (hdspm->io_type != MADIface) {
-- 
GitLab


From b07e4a3fb2473e3e55e209e2cd22295276de333a Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:17 +0530
Subject: [PATCH 0933/1341] ASoC: fsl_esai: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200902040221.354941-7-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/soc/fsl/fsl_esai.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
index 4ae36099ae82f..79b861afd9860 100644
--- a/sound/soc/fsl/fsl_esai.c
+++ b/sound/soc/fsl/fsl_esai.c
@@ -708,9 +708,9 @@ static void fsl_esai_trigger_stop(struct fsl_esai *esai_priv, bool tx)
 			   ESAI_xFCR_xFR, 0);
 }
 
-static void fsl_esai_hw_reset(unsigned long arg)
+static void fsl_esai_hw_reset(struct tasklet_struct *t)
 {
-	struct fsl_esai *esai_priv = (struct fsl_esai *)arg;
+	struct fsl_esai *esai_priv = from_tasklet(esai_priv, t, task);
 	bool tx = true, rx = false, enabled[2];
 	unsigned long lock_flags;
 	u32 tfcr, rfcr;
@@ -1070,8 +1070,7 @@ static int fsl_esai_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	tasklet_init(&esai_priv->task, fsl_esai_hw_reset,
-		     (unsigned long)esai_priv);
+	tasklet_setup(&esai_priv->task, fsl_esai_hw_reset);
 
 	pm_runtime_enable(&pdev->dev);
 
-- 
GitLab


From ea0364c01e9539a2ec973ab49df4b3124ec5d0fc Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:18 +0530
Subject: [PATCH 0934/1341] ASoC: siu: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200902040221.354941-8-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/soc/sh/siu_pcm.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/sound/soc/sh/siu_pcm.c b/sound/soc/sh/siu_pcm.c
index bd9de77c35f3e..50fc7810723ec 100644
--- a/sound/soc/sh/siu_pcm.c
+++ b/sound/soc/sh/siu_pcm.c
@@ -198,9 +198,9 @@ static int siu_pcm_rd_set(struct siu_port *port_info,
 	return 0;
 }
 
-static void siu_io_tasklet(unsigned long data)
+static void siu_io_tasklet(struct tasklet_struct *t)
 {
-	struct siu_stream *siu_stream = (struct siu_stream *)data;
+	struct siu_stream *siu_stream = from_tasklet(siu_stream, t, tasklet);
 	struct snd_pcm_substream *substream = siu_stream->substream;
 	struct device *dev = substream->pcm->card->dev;
 	struct snd_pcm_runtime *rt = substream->runtime;
@@ -520,10 +520,8 @@ static int siu_pcm_new(struct snd_soc_component *component,
 		(*port_info)->pcm = pcm;
 
 		/* IO tasklets */
-		tasklet_init(&(*port_info)->playback.tasklet, siu_io_tasklet,
-			     (unsigned long)&(*port_info)->playback);
-		tasklet_init(&(*port_info)->capture.tasklet, siu_io_tasklet,
-			     (unsigned long)&(*port_info)->capture);
+		tasklet_setup(&(*port_info)->playback.tasklet, siu_io_tasklet);
+		tasklet_setup(&(*port_info)->capture.tasklet, siu_io_tasklet);
 	}
 
 	dev_info(card->dev, "SuperH SIU driver initialized.\n");
-- 
GitLab


From ad77b35abb53481bc4cd7237ceae14af7275a50d Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:19 +0530
Subject: [PATCH 0935/1341] ASoC: txx9: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200902040221.354941-9-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/soc/txx9/txx9aclc.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/sound/soc/txx9/txx9aclc.c b/sound/soc/txx9/txx9aclc.c
index 4b1cd4da3e368..939b33ec39f50 100644
--- a/sound/soc/txx9/txx9aclc.c
+++ b/sound/soc/txx9/txx9aclc.c
@@ -134,9 +134,9 @@ txx9aclc_dma_submit(struct txx9aclc_dmadata *dmadata, dma_addr_t buf_dma_addr)
 
 #define NR_DMA_CHAIN		2
 
-static void txx9aclc_dma_tasklet(unsigned long data)
+static void txx9aclc_dma_tasklet(struct tasklet_struct *t)
 {
-	struct txx9aclc_dmadata *dmadata = (struct txx9aclc_dmadata *)data;
+	struct txx9aclc_dmadata *dmadata = from_tasklet(dmadata, t, tasklet);
 	struct dma_chan *chan = dmadata->dma_chan;
 	struct dma_async_tx_descriptor *desc;
 	struct snd_pcm_substream *substream = dmadata->substream;
@@ -352,8 +352,7 @@ static int txx9aclc_dma_init(struct txx9aclc_soc_device *dev,
 			"playback" : "capture");
 		return -EBUSY;
 	}
-	tasklet_init(&dmadata->tasklet, txx9aclc_dma_tasklet,
-		     (unsigned long)dmadata);
+	tasklet_setup(&dmadata->tasklet, txx9aclc_dma_tasklet);
 	return 0;
 }
 
-- 
GitLab


From 7fbf9547f3420bae7f3713fc97349767bced5906 Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:20 +0530
Subject: [PATCH 0936/1341] ALSA: usb-audio: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://lore.kernel.org/r/20200902040221.354941-10-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/midi.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/sound/usb/midi.c b/sound/usb/midi.c
index df639fe031181..e8287a05e36bc 100644
--- a/sound/usb/midi.c
+++ b/sound/usb/midi.c
@@ -344,10 +344,9 @@ static void snd_usbmidi_do_output(struct snd_usb_midi_out_endpoint *ep)
 	spin_unlock_irqrestore(&ep->buffer_lock, flags);
 }
 
-static void snd_usbmidi_out_tasklet(unsigned long data)
+static void snd_usbmidi_out_tasklet(struct tasklet_struct *t)
 {
-	struct snd_usb_midi_out_endpoint *ep =
-		(struct snd_usb_midi_out_endpoint *) data;
+	struct snd_usb_midi_out_endpoint *ep = from_tasklet(ep, t, tasklet);
 
 	snd_usbmidi_do_output(ep);
 }
@@ -1441,7 +1440,7 @@ static int snd_usbmidi_out_endpoint_create(struct snd_usb_midi *umidi,
 	}
 
 	spin_lock_init(&ep->buffer_lock);
-	tasklet_init(&ep->tasklet, snd_usbmidi_out_tasklet, (unsigned long)ep);
+	tasklet_setup(&ep->tasklet, snd_usbmidi_out_tasklet);
 	init_waitqueue_head(&ep->drain_wait);
 
 	for (i = 0; i < 0x10; ++i)
-- 
GitLab


From 07da90b0e5fc299c0ce4d34d1916d7a79b86848b Mon Sep 17 00:00:00 2001
From: Allen Pais <allen.lkml@gmail.com>
Date: Wed, 2 Sep 2020 09:32:21 +0530
Subject: [PATCH 0937/1341] ALSA: ua101: convert tasklets to use new
 tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://lore.kernel.org/r/20200902040221.354941-11-allen.lkml@gmail.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/usb/misc/ua101.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/sound/usb/misc/ua101.c b/sound/usb/misc/ua101.c
index 884e740a785c5..3b2dce1043f5a 100644
--- a/sound/usb/misc/ua101.c
+++ b/sound/usb/misc/ua101.c
@@ -247,9 +247,9 @@ static inline void add_with_wraparound(struct ua101 *ua,
 		*value -= ua->playback.queue_length;
 }
 
-static void playback_tasklet(unsigned long data)
+static void playback_tasklet(struct tasklet_struct *t)
 {
-	struct ua101 *ua = (void *)data;
+	struct ua101 *ua = from_tasklet(ua, t, playback_tasklet);
 	unsigned long flags;
 	unsigned int frames;
 	struct ua101_urb *urb;
@@ -1218,8 +1218,7 @@ static int ua101_probe(struct usb_interface *interface,
 	spin_lock_init(&ua->lock);
 	mutex_init(&ua->mutex);
 	INIT_LIST_HEAD(&ua->ready_playback_urbs);
-	tasklet_init(&ua->playback_tasklet,
-		     playback_tasklet, (unsigned long)ua);
+	tasklet_setup(&ua->playback_tasklet, playback_tasklet);
 	init_waitqueue_head(&ua->alsa_capture_wait);
 	init_waitqueue_head(&ua->rate_feedback_wait);
 	init_waitqueue_head(&ua->alsa_playback_wait);
-- 
GitLab


From 675bceb097e6fb9769309093ec6f3d33a2fed9cc Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Date: Wed, 2 Sep 2020 09:31:22 +0530
Subject: [PATCH 0938/1341] powerpc/mm: Remove DEBUG_VM_PGTABLE support on
 powerpc

The test is broken w.r.t page table update rules and results in kernel
crash as below. Disable the support until we get the tests updated.

[   21.083519] kernel BUG at arch/powerpc/mm/pgtable.c:304!
cpu 0x0: Vector: 700 (Program Check) at [c000000c6d1e76c0]
    pc: c00000000009a5ec: assert_pte_locked+0x14c/0x380
    lr: c0000000005eeeec: pte_update+0x11c/0x190
    sp: c000000c6d1e7950
   msr: 8000000002029033
  current = 0xc000000c6d172c80
  paca    = 0xc000000003ba0000   irqmask: 0x03   irq_happened: 0x01
    pid   = 1, comm = swapper/0
kernel BUG at arch/powerpc/mm/pgtable.c:304!
[link register   ] c0000000005eeeec pte_update+0x11c/0x190
[c000000c6d1e7950] 0000000000000001 (unreliable)
[c000000c6d1e79b0] c0000000005eee14 pte_update+0x44/0x190
[c000000c6d1e7a10] c000000001a2ca9c pte_advanced_tests+0x160/0x3d8
[c000000c6d1e7ab0] c000000001a2d4fc debug_vm_pgtable+0x7e8/0x1338
[c000000c6d1e7ba0] c0000000000116ec do_one_initcall+0xac/0x5f0
[c000000c6d1e7c80] c0000000019e4fac kernel_init_freeable+0x4dc/0x5a4
[c000000c6d1e7db0] c000000000012474 kernel_init+0x24/0x160
[c000000c6d1e7e20] c00000000000cbd0 ret_from_kernel_thread+0x5c/0x6c

With DEBUG_VM disabled

[   20.530152] BUG: Kernel NULL pointer dereference on read at 0x00000000
[   20.530183] Faulting instruction address: 0xc0000000000df330
cpu 0x33: Vector: 380 (Data SLB Access) at [c000000c6d19f700]
    pc: c0000000000df330: memset+0x68/0x104
    lr: c00000000009f6d8: hash__pmdp_huge_get_and_clear+0xe8/0x1b0
    sp: c000000c6d19f990
   msr: 8000000002009033
   dar: 0
  current = 0xc000000c6d177480
  paca    = 0xc00000001ec4f400   irqmask: 0x03   irq_happened: 0x01
    pid   = 1, comm = swapper/0
[link register   ] c00000000009f6d8 hash__pmdp_huge_get_and_clear+0xe8/0x1b0
[c000000c6d19f990] c00000000009f748 hash__pmdp_huge_get_and_clear+0x158/0x1b0 (unreliable)
[c000000c6d19fa10] c0000000019ebf30 pmd_advanced_tests+0x1f0/0x378
[c000000c6d19fab0] c0000000019ed088 debug_vm_pgtable+0x79c/0x1244
[c000000c6d19fba0] c0000000000116ec do_one_initcall+0xac/0x5f0
[c000000c6d19fc80] c0000000019a4fac kernel_init_freeable+0x4dc/0x5a4
[c000000c6d19fdb0] c000000000012474 kernel_init+0x24/0x160
[c000000c6d19fe20] c00000000000cbd0 ret_from_kernel_thread+0x5c/0x6c
33:mon>

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200902040122.136414-1-aneesh.kumar@linux.ibm.com
---
 Documentation/features/debug/debug-vm-pgtable/arch-support.txt | 2 +-
 arch/powerpc/Kconfig                                           | 1 -
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/Documentation/features/debug/debug-vm-pgtable/arch-support.txt b/Documentation/features/debug/debug-vm-pgtable/arch-support.txt
index 53da483c8326a..1c49723e75345 100644
--- a/Documentation/features/debug/debug-vm-pgtable/arch-support.txt
+++ b/Documentation/features/debug/debug-vm-pgtable/arch-support.txt
@@ -22,7 +22,7 @@
     |       nios2: | TODO |
     |    openrisc: | TODO |
     |      parisc: | TODO |
-    |     powerpc: |  ok  |
+    |     powerpc: | TODO |
     |       riscv: |  ok  |
     |        s390: |  ok  |
     |          sh: | TODO |
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 65bed1fdeaad7..787e829b6f25c 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -116,7 +116,6 @@ config PPC
 	#
 	select ARCH_32BIT_OFF_T if PPC32
 	select ARCH_HAS_DEBUG_VIRTUAL
-	select ARCH_HAS_DEBUG_VM_PGTABLE
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
 	select ARCH_HAS_ELF_RANDOMIZE
 	select ARCH_HAS_FORTIFY_SOURCE
-- 
GitLab


From 95d1c8e5f801e959a89181a2548a3efa60a1a6ce Mon Sep 17 00:00:00 2001
From: Jiufei Xue <jiufei.xue@linux.alibaba.com>
Date: Wed, 2 Sep 2020 17:59:39 +0800
Subject: [PATCH 0939/1341] io_uring: set table->files[i] to NULL when
 io_sqe_file_register failed

While io_sqe_file_register() failed in __io_sqe_files_update(),
table->files[i] still point to the original file which may freed
soon, and that will trigger use-after-free problems.

Cc: stable@vger.kernel.org
Fixes: f3bd9dae3708 ("io_uring: fix memleak in __io_sqe_files_update()")
Signed-off-by: Jiufei Xue <jiufei.xue@linux.alibaba.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index a06b562890394..b1ccd7072d93f 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7353,6 +7353,7 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx,
 			table->files[index] = file;
 			err = io_sqe_file_register(ctx, file, i);
 			if (err) {
+				table->files[index] = NULL;
 				fput(file);
 				break;
 			}
-- 
GitLab


From 77f4689de17c0887775bb77896f4cc11a39bf848 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 2 Sep 2020 11:30:48 -0400
Subject: [PATCH 0940/1341] fix regression in "epoll: Keep a reference on files
 added to the check list"

epoll_loop_check_proc() can run into a file already committed to destruction;
we can't grab a reference on those and don't need to add them to the set for
reverse path check anyway.

Tested-by: Marc Zyngier <maz@kernel.org>
Fixes: a9ed4a6560b8 ("epoll: Keep a reference on files added to the check list")
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
 fs/eventpoll.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index e0decff22ae27..8107e06d7f6f5 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1995,9 +1995,9 @@ static int ep_loop_check_proc(void *priv, void *cookie, int call_nests)
 			 * during ep_insert().
 			 */
 			if (list_empty(&epi->ffd.file->f_tfile_llink)) {
-				get_file(epi->ffd.file);
-				list_add(&epi->ffd.file->f_tfile_llink,
-					 &tfile_check_list);
+				if (get_file_rcu(epi->ffd.file))
+					list_add(&epi->ffd.file->f_tfile_llink,
+						 &tfile_check_list);
 			}
 		}
 	}
-- 
GitLab


From 355afaeb578abac907217c256a844cfafb0337b2 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Wed, 2 Sep 2020 09:30:31 -0600
Subject: [PATCH 0941/1341] io_uring: no read/write-retry on -EAGAIN error and
 O_NONBLOCK marked file

Actually two things that need fixing up here:

- The io_rw_reissue() -EAGAIN retry is explicit to block devices and
  regular files, so don't ever attempt to do that on other types of
  files.

- If we hit -EAGAIN on a nonblock marked file, don't arm poll handler for
  it. It should just complete with -EAGAIN.

Cc: stable@vger.kernel.org
Reported-by: Norman Maurer <norman.maurer@googlemail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index b1ccd7072d93f..64c5a52fad126 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2300,8 +2300,11 @@ static bool io_resubmit_prep(struct io_kiocb *req, int error)
 static bool io_rw_reissue(struct io_kiocb *req, long res)
 {
 #ifdef CONFIG_BLOCK
+	umode_t mode = file_inode(req->file)->i_mode;
 	int ret;
 
+	if (!S_ISBLK(mode) && !S_ISREG(mode))
+		return false;
 	if ((res != -EAGAIN && res != -EOPNOTSUPP) || io_wq_current_is_worker())
 		return false;
 
@@ -3146,6 +3149,9 @@ static int io_read(struct io_kiocb *req, bool force_nonblock,
 		/* IOPOLL retry should happen for io-wq threads */
 		if (!force_nonblock && !(req->ctx->flags & IORING_SETUP_IOPOLL))
 			goto done;
+		/* no retry on NONBLOCK marked file */
+		if (req->file->f_flags & O_NONBLOCK)
+			goto done;
 		/* some cases will consume bytes even on error returns */
 		iov_iter_revert(iter, iov_count - iov_iter_count(iter));
 		ret = io_setup_async_rw(req, iovec, inline_vecs, iter, false);
@@ -3287,10 +3293,14 @@ static int io_write(struct io_kiocb *req, bool force_nonblock,
 	 */
 	if (ret2 == -EOPNOTSUPP && (kiocb->ki_flags & IOCB_NOWAIT))
 		ret2 = -EAGAIN;
+	/* no retry on NONBLOCK marked file */
+	if (ret2 == -EAGAIN && (req->file->f_flags & O_NONBLOCK))
+		goto done;
 	if (!force_nonblock || ret2 != -EAGAIN) {
 		/* IOPOLL retry should happen for io-wq threads */
 		if ((req->ctx->flags & IORING_SETUP_IOPOLL) && ret2 == -EAGAIN)
 			goto copy_iov;
+done:
 		kiocb_done(kiocb, ret2, cs);
 	} else {
 copy_iov:
-- 
GitLab


From f804a324a41a880c1ab43cc5145d8b3e5790430d Mon Sep 17 00:00:00 2001
From: Rander Wang <rander.wang@intel.com>
Date: Wed, 2 Sep 2020 18:42:07 +0300
Subject: [PATCH 0942/1341] ALSA: hda: hdmi - add Rocketlake support

Add Rocketlake HDMI codec support. Rocketlake shares
the pin-to-port mapping table with Tigerlake.

Signed-off-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200902154207.1440393-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_hdmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 1e1b13eb78292..4020500880905 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -4269,6 +4269,7 @@ HDA_CODEC_ENTRY(0x8086280c, "Cannonlake HDMI",	patch_i915_glk_hdmi),
 HDA_CODEC_ENTRY(0x8086280d, "Geminilake HDMI",	patch_i915_glk_hdmi),
 HDA_CODEC_ENTRY(0x8086280f, "Icelake HDMI",	patch_i915_icl_hdmi),
 HDA_CODEC_ENTRY(0x80862812, "Tigerlake HDMI",	patch_i915_tgl_hdmi),
+HDA_CODEC_ENTRY(0x80862816, "Rocketlake HDMI",	patch_i915_tgl_hdmi),
 HDA_CODEC_ENTRY(0x8086281a, "Jasperlake HDMI",	patch_i915_icl_hdmi),
 HDA_CODEC_ENTRY(0x8086281b, "Elkhartlake HDMI",	patch_i915_icl_hdmi),
 HDA_CODEC_ENTRY(0x80862880, "CedarTrail HDMI",	patch_generic_hdmi),
-- 
GitLab


From 13774d81f38538c5fa2924bdcdfa509155480fa6 Mon Sep 17 00:00:00 2001
From: Rander Wang <rander.wang@intel.com>
Date: Wed, 2 Sep 2020 18:42:18 +0300
Subject: [PATCH 0943/1341] ALSA: hda: fix a runtime pm issue in SOF when
 integrated GPU is disabled

In snd_hdac_device_init pm_runtime_set_active is called to
increase child_count in parent device. But when it is failed
to build connection with GPU for one case that integrated
graphic gpu is disabled, snd_hdac_ext_bus_device_exit will be
invoked to clean up a HD-audio extended codec base device. At
this time the child_count of parent is not decreased, which
makes parent device can't get suspended.

This patch calls pm_runtime_set_suspended to decrease child_count
in parent device in snd_hdac_device_exit to match with
snd_hdac_device_init. pm_runtime_set_suspended can make sure that
it will not decrease child_count if the device is already suspended.

Signed-off-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200902154218.1440441-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/hda/hdac_device.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/hda/hdac_device.c b/sound/hda/hdac_device.c
index 333220f0f8afc..3e9e9ac804f62 100644
--- a/sound/hda/hdac_device.c
+++ b/sound/hda/hdac_device.c
@@ -127,6 +127,8 @@ EXPORT_SYMBOL_GPL(snd_hdac_device_init);
 void snd_hdac_device_exit(struct hdac_device *codec)
 {
 	pm_runtime_put_noidle(&codec->dev);
+	/* keep balance of runtime PM child_count in parent device */
+	pm_runtime_set_suspended(&codec->dev);
 	snd_hdac_bus_remove_device(codec->bus, codec);
 	kfree(codec->vendor_name);
 	kfree(codec->chip_name);
-- 
GitLab


From ae035947162c9350619de1b3a3e3051a265f43f2 Mon Sep 17 00:00:00 2001
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Date: Wed, 2 Sep 2020 18:42:39 +0300
Subject: [PATCH 0944/1341] ALSA: hda: add dev_dbg log when driver is not
 selected

On SKL+ Intel platforms, the driver selection is handled by the
snd_intel_dspcfg, and when the HDaudio legacy driver is not selected,
be it with the auto-selection or user preferences with a kernel
parameter, the probe aborts with no logs, only a -ENODEV return value.

Having no dmesg trace, even with dynamic debug enabled, makes support
more complicated than it needs to be, and even experienced users can
be fooled. A simple dev_dbg() trace solves this problem.

BugLink: https://github.com/thesofproject/linux/issues/2330
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200902154239.1440537-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/hda_intel.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 0f86e3765bb33..36a9dbc33aa01 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2127,9 +2127,10 @@ static int azx_probe(struct pci_dev *pci,
 	 */
 	if (dmic_detect) {
 		err = snd_intel_dsp_driver_probe(pci);
-		if (err != SND_INTEL_DSP_DRIVER_ANY &&
-		    err != SND_INTEL_DSP_DRIVER_LEGACY)
+		if (err != SND_INTEL_DSP_DRIVER_ANY && err != SND_INTEL_DSP_DRIVER_LEGACY) {
+			dev_dbg(&pci->dev, "HDAudio driver not selected, aborting probe\n");
 			return -ENODEV;
+		}
 	} else {
 		dev_warn(&pci->dev, "dmic_detect option is deprecated, pass snd-intel-dspcfg.dsp_driver=1 option instead\n");
 	}
-- 
GitLab


From 3b5455636fe26ea21b4189d135a424a6da016418 Mon Sep 17 00:00:00 2001
From: Tejun Heo <tj@kernel.org>
Date: Wed, 2 Sep 2020 12:32:45 -0400
Subject: [PATCH 0945/1341] libata: implement ATA_HORKAGE_MAX_TRIM_128M and
 apply to Sandisks

All three generations of Sandisk SSDs lock up hard intermittently.
Experiments showed that disabling NCQ lowered the failure rate significantly
and the kernel has been disabling NCQ for some models of SD7's and 8's,
which is obviously undesirable.

Karthik worked with Sandisk to root cause the hard lockups to trim commands
larger than 128M. This patch implements ATA_HORKAGE_MAX_TRIM_128M which
limits max trim size to 128M and applies it to all three generations of
Sandisk SSDs.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Karthik Shivaram <karthikgs@fb.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 drivers/ata/libata-core.c | 5 ++---
 drivers/ata/libata-scsi.c | 8 +++++++-
 include/linux/libata.h    | 1 +
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index b1cd4d97bc2a7..1be73d29119ab 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -3868,9 +3868,8 @@ static const struct ata_blacklist_entry ata_device_blacklist [] = {
 	/* https://bugzilla.kernel.org/show_bug.cgi?id=15573 */
 	{ "C300-CTFDDAC128MAG",	"0001",		ATA_HORKAGE_NONCQ, },
 
-	/* Some Sandisk SSDs lock up hard with NCQ enabled.  Reported on
-	   SD7SN6S256G and SD8SN8U256G */
-	{ "SanDisk SD[78]SN*G",	NULL,		ATA_HORKAGE_NONCQ, },
+	/* Sandisk SD7/8/9s lock up hard on large trims */
+	{ "SanDisk SD[789]*",	NULL,		ATA_HORKAGE_MAX_TRIM_128M, },
 
 	/* devices which puke on READ_NATIVE_MAX */
 	{ "HDS724040KLSA80",	"KFAOA20N",	ATA_HORKAGE_BROKEN_HPA, },
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index ec233208585bd..c7b5049b42d1f 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -2080,6 +2080,7 @@ static unsigned int ata_scsiop_inq_89(struct ata_scsi_args *args, u8 *rbuf)
 
 static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
 {
+	struct ata_device *dev = args->dev;
 	u16 min_io_sectors;
 
 	rbuf[1] = 0xb0;
@@ -2105,7 +2106,12 @@ static unsigned int ata_scsiop_inq_b0(struct ata_scsi_args *args, u8 *rbuf)
 	 * with the unmap bit set.
 	 */
 	if (ata_id_has_trim(args->id)) {
-		put_unaligned_be64(65535 * ATA_MAX_TRIM_RNUM, &rbuf[36]);
+		u64 max_blocks = 65535 * ATA_MAX_TRIM_RNUM;
+
+		if (dev->horkage & ATA_HORKAGE_MAX_TRIM_128M)
+			max_blocks = 128 << (20 - SECTOR_SHIFT);
+
+		put_unaligned_be64(max_blocks, &rbuf[36]);
 		put_unaligned_be32(1, &rbuf[28]);
 	}
 
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 77ccf040a128b..5f550eb27f811 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -421,6 +421,7 @@ enum {
 	ATA_HORKAGE_NO_DMA_LOG	= (1 << 23),	/* don't use DMA for log read */
 	ATA_HORKAGE_NOTRIM	= (1 << 24),	/* don't use TRIM */
 	ATA_HORKAGE_MAX_SEC_1024 = (1 << 25),	/* Limit max sects to 1024 */
+	ATA_HORKAGE_MAX_TRIM_128M = (1 << 26),	/* Limit max trim size to 128M */
 
 	 /* DMA mask for user DMA control: User visible values; DO NOT
 	    renumber */
-- 
GitLab


From b79de57b4378a93115307be6962d05b099eb0f37 Mon Sep 17 00:00:00 2001
From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Date: Wed, 2 Sep 2020 18:42:50 +0300
Subject: [PATCH 0946/1341] ALSA: hda: use consistent HDAudio spelling in
 comments/docs

We use HDaudio and HDAudio, pick one to make searches easier.
No functionality change

Also fix timestamping typo in documentation.

Reported-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20200902154250.1440585-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 Documentation/sound/designs/timestamping.rst |  2 +-
 sound/hda/intel-dsp-config.c                 | 10 +++++-----
 sound/x86/Kconfig                            |  2 +-
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/Documentation/sound/designs/timestamping.rst b/Documentation/sound/designs/timestamping.rst
index 2b0fff5034151..7c7ecf5dbc4bd 100644
--- a/Documentation/sound/designs/timestamping.rst
+++ b/Documentation/sound/designs/timestamping.rst
@@ -143,7 +143,7 @@ timestamp shows when the information is put together by the driver
 before returning from the ``STATUS`` and ``STATUS_EXT`` ioctl. in most cases
 this driver_timestamp will be identical to the regular system tstamp.
 
-Examples of typestamping with HDaudio:
+Examples of timestamping with HDAudio:
 
 1. DMA timestamp, no compensation for DMA+analog delay
 ::
diff --git a/sound/hda/intel-dsp-config.c b/sound/hda/intel-dsp-config.c
index 99aec73491676..1c5114dedda92 100644
--- a/sound/hda/intel-dsp-config.c
+++ b/sound/hda/intel-dsp-config.c
@@ -54,7 +54,7 @@ static const struct config_entry config_table[] = {
 #endif
 /*
  * Apollolake (Broxton-P)
- * the legacy HDaudio driver is used except on Up Squared (SOF) and
+ * the legacy HDAudio driver is used except on Up Squared (SOF) and
  * Chromebooks (SST)
  */
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_APOLLOLAKE)
@@ -89,7 +89,7 @@ static const struct config_entry config_table[] = {
 	},
 #endif
 /*
- * Skylake and Kabylake use legacy HDaudio driver except for Google
+ * Skylake and Kabylake use legacy HDAudio driver except for Google
  * Chromebooks (SST)
  */
 
@@ -135,7 +135,7 @@ static const struct config_entry config_table[] = {
 #endif
 
 /*
- * Geminilake uses legacy HDaudio driver except for Google
+ * Geminilake uses legacy HDAudio driver except for Google
  * Chromebooks
  */
 /* Geminilake */
@@ -157,7 +157,7 @@ static const struct config_entry config_table[] = {
 
 /*
  * CoffeeLake, CannonLake, CometLake, IceLake, TigerLake use legacy
- * HDaudio driver except for Google Chromebooks and when DMICs are
+ * HDAudio driver except for Google Chromebooks and when DMICs are
  * present. Two cases are required since Coreboot does not expose NHLT
  * tables.
  *
@@ -391,7 +391,7 @@ int snd_intel_dsp_driver_probe(struct pci_dev *pci)
 	if (pci->class == 0x040300)
 		return SND_INTEL_DSP_DRIVER_LEGACY;
 	if (pci->class != 0x040100 && pci->class != 0x040380) {
-		dev_err(&pci->dev, "Unknown PCI class/subclass/prog-if information (0x%06x) found, selecting HDA legacy driver\n", pci->class);
+		dev_err(&pci->dev, "Unknown PCI class/subclass/prog-if information (0x%06x) found, selecting HDAudio legacy driver\n", pci->class);
 		return SND_INTEL_DSP_DRIVER_LEGACY;
 	}
 
diff --git a/sound/x86/Kconfig b/sound/x86/Kconfig
index 77777192f6508..4ffcc5e623c22 100644
--- a/sound/x86/Kconfig
+++ b/sound/x86/Kconfig
@@ -9,7 +9,7 @@ menuconfig SND_X86
 if SND_X86
 
 config HDMI_LPE_AUDIO
-	tristate "HDMI audio without HDaudio on Intel Atom platforms"
+	tristate "HDMI audio without HDAudio on Intel Atom platforms"
 	depends on DRM_I915
 	select SND_PCM
 	help
-- 
GitLab


From d16ff19e69ab57e08bf908faaacbceaf660249de Mon Sep 17 00:00:00 2001
From: Ye Bin <yebin10@huawei.com>
Date: Tue, 1 Sep 2020 14:25:42 +0800
Subject: [PATCH 0947/1341] dm cache metadata: Avoid returning cmd->bm wild
 pointer on error

Maybe __create_persistent_data_objects() caller will use PTR_ERR as a
pointer, it will lead to some strange things.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
 drivers/md/dm-cache-metadata.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm-cache-metadata.c b/drivers/md/dm-cache-metadata.c
index 151aa95775be2..af6d4f898e4c1 100644
--- a/drivers/md/dm-cache-metadata.c
+++ b/drivers/md/dm-cache-metadata.c
@@ -537,12 +537,16 @@ static int __create_persistent_data_objects(struct dm_cache_metadata *cmd,
 					  CACHE_MAX_CONCURRENT_LOCKS);
 	if (IS_ERR(cmd->bm)) {
 		DMERR("could not create block manager");
-		return PTR_ERR(cmd->bm);
+		r = PTR_ERR(cmd->bm);
+		cmd->bm = NULL;
+		return r;
 	}
 
 	r = __open_or_format_metadata(cmd, may_format_device);
-	if (r)
+	if (r) {
 		dm_block_manager_destroy(cmd->bm);
+		cmd->bm = NULL;
+	}
 
 	return r;
 }
-- 
GitLab


From 219403d7e56f9b716ad80ab87db85d29547ee73e Mon Sep 17 00:00:00 2001
From: Ye Bin <yebin10@huawei.com>
Date: Tue, 1 Sep 2020 14:25:43 +0800
Subject: [PATCH 0948/1341] dm thin metadata:  Avoid returning cmd->bm wild
 pointer on error

Maybe __create_persistent_data_objects() caller will use PTR_ERR as a
pointer, it will lead to some strange things.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
 drivers/md/dm-thin-metadata.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index 76b6b323bf4bd..ddb7f1f0bc48a 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -739,12 +739,16 @@ static int __create_persistent_data_objects(struct dm_pool_metadata *pmd, bool f
 					  THIN_MAX_CONCURRENT_LOCKS);
 	if (IS_ERR(pmd->bm)) {
 		DMERR("could not create block manager");
-		return PTR_ERR(pmd->bm);
+		r = PTR_ERR(pmd->bm);
+		pmd->bm = NULL;
+		return r;
 	}
 
 	r = __open_or_format_metadata(pmd, format_device);
-	if (r)
+	if (r) {
 		dm_block_manager_destroy(pmd->bm);
+		pmd->bm = NULL;
+	}
 
 	return r;
 }
-- 
GitLab


From 3a653b205f29b3f9827a01a0c88bfbcb0d169494 Mon Sep 17 00:00:00 2001
From: Ye Bin <yebin10@huawei.com>
Date: Tue, 1 Sep 2020 14:25:44 +0800
Subject: [PATCH 0949/1341] dm thin metadata: Fix use-after-free in
 dm_bm_set_read_only

The following error ocurred when testing disk online/offline:

[  301.798344] device-mapper: thin: 253:5: aborting current metadata transaction
[  301.848441] device-mapper: thin: 253:5: failed to abort metadata transaction
[  301.849206] Aborting journal on device dm-26-8.
[  301.850489] EXT4-fs error (device dm-26) in __ext4_new_inode:943: Journal has aborted
[  301.851095] EXT4-fs (dm-26): Delayed block allocation failed for inode 398742 at logical offset 181 with max blocks 19 with error 30
[  301.854476] BUG: KASAN: use-after-free in dm_bm_set_read_only+0x3a/0x40 [dm_persistent_data]

Reason is:

 metadata_operation_failed
    abort_transaction
        dm_pool_abort_metadata
	    __create_persistent_data_objects
	        r = __open_or_format_metadata
	        if (r) --> If failed will free pmd->bm but pmd->bm not set NULL
		    dm_block_manager_destroy(pmd->bm);
    set_pool_mode
	dm_pool_metadata_read_only(pool->pmd);
	dm_bm_set_read_only(pmd->bm);  --> use-after-free

Add checks to see if pmd->bm is NULL in dm_bm_set_read_only and
dm_bm_set_read_write functions.  If bm is NULL it means creating the
bm failed and so dm_bm_is_read_only must return true.

Signed-off-by: Ye Bin <yebin10@huawei.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
---
 drivers/md/dm-thin-metadata.c                 |  2 +-
 drivers/md/persistent-data/dm-block-manager.c | 14 ++++++++------
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/md/dm-thin-metadata.c b/drivers/md/dm-thin-metadata.c
index ddb7f1f0bc48a..b461836b6d263 100644
--- a/drivers/md/dm-thin-metadata.c
+++ b/drivers/md/dm-thin-metadata.c
@@ -958,7 +958,7 @@ int dm_pool_metadata_close(struct dm_pool_metadata *pmd)
 	}
 
 	pmd_write_lock_in_core(pmd);
-	if (!dm_bm_is_read_only(pmd->bm) && !pmd->fail_io) {
+	if (!pmd->fail_io && !dm_bm_is_read_only(pmd->bm)) {
 		r = __commit_transaction(pmd);
 		if (r < 0)
 			DMWARN("%s: __commit_transaction() failed, error = %d",
diff --git a/drivers/md/persistent-data/dm-block-manager.c b/drivers/md/persistent-data/dm-block-manager.c
index 749ec268d957d..54c089a50b152 100644
--- a/drivers/md/persistent-data/dm-block-manager.c
+++ b/drivers/md/persistent-data/dm-block-manager.c
@@ -493,7 +493,7 @@ int dm_bm_write_lock(struct dm_block_manager *bm,
 	void *p;
 	int r;
 
-	if (bm->read_only)
+	if (dm_bm_is_read_only(bm))
 		return -EPERM;
 
 	p = dm_bufio_read(bm->bufio, b, (struct dm_buffer **) result);
@@ -562,7 +562,7 @@ int dm_bm_write_lock_zero(struct dm_block_manager *bm,
 	struct buffer_aux *aux;
 	void *p;
 
-	if (bm->read_only)
+	if (dm_bm_is_read_only(bm))
 		return -EPERM;
 
 	p = dm_bufio_new(bm->bufio, b, (struct dm_buffer **) result);
@@ -602,7 +602,7 @@ EXPORT_SYMBOL_GPL(dm_bm_unlock);
 
 int dm_bm_flush(struct dm_block_manager *bm)
 {
-	if (bm->read_only)
+	if (dm_bm_is_read_only(bm))
 		return -EPERM;
 
 	return dm_bufio_write_dirty_buffers(bm->bufio);
@@ -616,19 +616,21 @@ void dm_bm_prefetch(struct dm_block_manager *bm, dm_block_t b)
 
 bool dm_bm_is_read_only(struct dm_block_manager *bm)
 {
-	return bm->read_only;
+	return (bm ? bm->read_only : true);
 }
 EXPORT_SYMBOL_GPL(dm_bm_is_read_only);
 
 void dm_bm_set_read_only(struct dm_block_manager *bm)
 {
-	bm->read_only = true;
+	if (bm)
+		bm->read_only = true;
 }
 EXPORT_SYMBOL_GPL(dm_bm_set_read_only);
 
 void dm_bm_set_read_write(struct dm_block_manager *bm)
 {
-	bm->read_only = false;
+	if (bm)
+		bm->read_only = false;
 }
 EXPORT_SYMBOL_GPL(dm_bm_set_read_write);
 
-- 
GitLab


From 6a0137101f47301fff2da6ba4b9048383d569909 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 1 Sep 2020 10:06:23 +0200
Subject: [PATCH 0950/1341] ASoC: Intel: bytcr_rt5640: Add quirk for MPMAN
 Converter9 2-in-1

The MPMAN Converter9 2-in-1 almost fully works with out default settings.
The only problem is that it has only 1 speaker so any sounds only playing
on the right channel get lost.

Add a quirk for this model using the default settings + MONO_SPEAKER.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200901080623.4987-1-hdegoede@redhat.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/intel/boards/bytcr_rt5640.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/sound/soc/intel/boards/bytcr_rt5640.c b/sound/soc/intel/boards/bytcr_rt5640.c
index 479992f4e97a3..fc202747ba837 100644
--- a/sound/soc/intel/boards/bytcr_rt5640.c
+++ b/sound/soc/intel/boards/bytcr_rt5640.c
@@ -591,6 +591,16 @@ static const struct dmi_system_id byt_rt5640_quirk_table[] = {
 					BYT_RT5640_SSP0_AIF1 |
 					BYT_RT5640_MCLK_EN),
 	},
+	{	/* MPMAN Converter 9, similar hw as the I.T.Works TW891 2-in-1 */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "MPMAN"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Converter9"),
+		},
+		.driver_data = (void *)(BYTCR_INPUT_DEFAULTS |
+					BYT_RT5640_MONO_SPEAKER |
+					BYT_RT5640_SSP0_AIF1 |
+					BYT_RT5640_MCLK_EN),
+	},
 	{
 		/* MPMAN MPWIN895CL */
 		.matches = {
-- 
GitLab


From 59ae97a7a9e1499c2070e29841d1c4be4ae2994a Mon Sep 17 00:00:00 2001
From: Vincent Whitchurch <vincent.whitchurch@axis.com>
Date: Wed, 2 Sep 2020 15:09:52 +0200
Subject: [PATCH 0951/1341] regulator: pwm: Fix machine constraints application

If the zero duty cycle doesn't correspond to any voltage in the voltage
table, the PWM regulator returns an -EINVAL from get_voltage_sel() which
results in the core erroring out with a "failed to get the current
voltage" and ending up not applying the machine constraints.

Instead, return -ENOTRECOVERABLE which makes the core set the voltage
since it's at an unknown value.

For example, with this device tree:

	fooregulator {
		compatible = "pwm-regulator";
		pwms = <&foopwm 0 100000>;
		regulator-min-microvolt = <2250000>;
		regulator-max-microvolt = <2250000>;
		regulator-name = "fooregulator";
		regulator-always-on;
		regulator-boot-on;
		voltage-table = <2250000 30>;
	};

Before this patch:

  fooregulator: failed to get the current voltage(-22)

After this patch:

  fooregulator: Setting 2250000-2250000uV
  fooregulator: 2250 mV

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20200902130952.24880-1-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/regulator/pwm-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c
index 3234b118b53ea..990bd50771d8d 100644
--- a/drivers/regulator/pwm-regulator.c
+++ b/drivers/regulator/pwm-regulator.c
@@ -279,7 +279,7 @@ static int pwm_regulator_init_table(struct platform_device *pdev,
 		return ret;
 	}
 
-	drvdata->state			= -EINVAL;
+	drvdata->state			= -ENOTRECOVERABLE;
 	drvdata->duty_cycle_table	= duty_cycle_table;
 	drvdata->desc.ops = &pwm_regulator_voltage_table_ops;
 	drvdata->desc.n_voltages	= length / sizeof(*duty_cycle_table);
-- 
GitLab


From 837ba18dfcd4db21ad58107c65bfe89753aa56d7 Mon Sep 17 00:00:00 2001
From: Vincent Whitchurch <vincent.whitchurch@axis.com>
Date: Wed, 2 Sep 2020 15:23:41 +0200
Subject: [PATCH 0952/1341] spi: spi-loopback-test: Fix out-of-bounds read

The "tx/rx-transfer - crossing PAGE_SIZE" test always fails when
len=131071 and rx_offset >= 5:

 spi-loopback-test spi0.0: Running test tx/rx-transfer - crossing PAGE_SIZE
 ...
   with iteration values: len = 131071, tx_off = 0, rx_off = 3
   with iteration values: len = 131071, tx_off = 0, rx_off = 4
   with iteration values: len = 131071, tx_off = 0, rx_off = 5
 loopback strangeness - rx changed outside of allowed range at: ...a4321000
   spi_msg@ffffffd5a4157690
     frame_length:  131071
     actual_length: 131071
     spi_transfer@ffffffd5a41576f8
       len:    131071
       tx_buf: ffffffd5a4340ffc

Note that rx_offset > 3 can only occur if the SPI controller driver sets
->dma_alignment to a higher value than 4, so most SPI controller drivers
are not affect.

The allocated Rx buffer is of size SPI_TEST_MAX_SIZE_PLUS, which is 132
KiB (assuming 4 KiB pages).  This test uses an initial offset into the
rx_buf of PAGE_SIZE - 4, and a len of 131071, so the range expected to
be written in this transfer ends at (4096 - 4) + 5 + 131071 == 132 KiB,
which is also the end of the allocated buffer.  But the code which
verifies the content of the buffer reads a byte beyond the allocated
buffer and spuriously fails because this out-of-bounds read doesn't
return the expected value.

Fix this by using ITERATE_LEN instead of ITERATE_MAX_LEN to avoid
testing sizes which cause out-of-bounds reads.

Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Link: https://lore.kernel.org/r/20200902132341.7079-1-vincent.whitchurch@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-loopback-test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-loopback-test.c b/drivers/spi/spi-loopback-test.c
index 9522d1b5786d5..df981e55c24c9 100644
--- a/drivers/spi/spi-loopback-test.c
+++ b/drivers/spi/spi-loopback-test.c
@@ -90,7 +90,7 @@ static struct spi_test spi_tests[] = {
 	{
 		.description	= "tx/rx-transfer - crossing PAGE_SIZE",
 		.fill_option	= FILL_COUNT_8,
-		.iterate_len    = { ITERATE_MAX_LEN },
+		.iterate_len    = { ITERATE_LEN },
 		.iterate_tx_align = ITERATE_ALIGN,
 		.iterate_rx_align = ITERATE_ALIGN,
 		.transfer_count = 1,
-- 
GitLab


From 8aa64be019567c4f90d45c5082a4b6f22e182d00 Mon Sep 17 00:00:00 2001
From: Xi Wang <wangxi11@huawei.com>
Date: Tue, 1 Sep 2020 20:38:55 +0800
Subject: [PATCH 0953/1341] RDMA/core: Fix unsafe linked list traversal after
 failing to allocate CQ

It's not safe to access the next CQ in list_for_each_entry() after
invoking ib_free_cq(), because the CQ has already been freed in current
iteration.  It should be replaced by list_for_each_entry_safe().

Fixes: c7ff819aefea ("RDMA/core: Introduce shared CQ pool API")
Link: https://lore.kernel.org/r/1598963935-32335-1-git-send-email-liweihang@huawei.com
Signed-off-by: Xi Wang <wangxi11@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/core/cq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/core/cq.c b/drivers/infiniband/core/cq.c
index 513825e424bff..a92fc3f90bb5b 100644
--- a/drivers/infiniband/core/cq.c
+++ b/drivers/infiniband/core/cq.c
@@ -379,7 +379,7 @@ static int ib_alloc_cqs(struct ib_device *dev, unsigned int nr_cqes,
 {
 	LIST_HEAD(tmp_list);
 	unsigned int nr_cqs, i;
-	struct ib_cq *cq;
+	struct ib_cq *cq, *n;
 	int ret;
 
 	if (poll_ctx > IB_POLL_LAST_POOL_TYPE) {
@@ -412,7 +412,7 @@ static int ib_alloc_cqs(struct ib_device *dev, unsigned int nr_cqes,
 	return 0;
 
 out_free_cqs:
-	list_for_each_entry(cq, &tmp_list, pool_entry) {
+	list_for_each_entry_safe(cq, n, &tmp_list, pool_entry) {
 		cq->shared = false;
 		ib_free_cq(cq);
 	}
-- 
GitLab


From 7deedd9f0e43bb3f4ea531b3ea9ecc27bf1f4871 Mon Sep 17 00:00:00 2001
From: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Date: Wed, 2 Sep 2020 09:28:07 +0000
Subject: [PATCH 0954/1341] amd-xgbe: Add support for new port mode

Add support for a new port mode that is a backplane connection without
support for auto negotiation.

Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
index 46c3c1ca38d60..859ded0c06b05 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-phy-v2.c
@@ -166,6 +166,7 @@ enum xgbe_port_mode {
 	XGBE_PORT_MODE_10GBASE_T,
 	XGBE_PORT_MODE_10GBASE_R,
 	XGBE_PORT_MODE_SFP,
+	XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG,
 	XGBE_PORT_MODE_MAX,
 };
 
@@ -1634,6 +1635,7 @@ static enum xgbe_mode xgbe_phy_an73_redrv_outcome(struct xgbe_prv_data *pdata)
 	if (ad_reg & 0x80) {
 		switch (phy_data->port_mode) {
 		case XGBE_PORT_MODE_BACKPLANE:
+		case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 			mode = XGBE_MODE_KR;
 			break;
 		default:
@@ -1643,6 +1645,7 @@ static enum xgbe_mode xgbe_phy_an73_redrv_outcome(struct xgbe_prv_data *pdata)
 	} else if (ad_reg & 0x20) {
 		switch (phy_data->port_mode) {
 		case XGBE_PORT_MODE_BACKPLANE:
+		case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 			mode = XGBE_MODE_KX_1000;
 			break;
 		case XGBE_PORT_MODE_1000BASE_X:
@@ -1782,6 +1785,7 @@ static void xgbe_phy_an_advertising(struct xgbe_prv_data *pdata,
 
 	switch (phy_data->port_mode) {
 	case XGBE_PORT_MODE_BACKPLANE:
+	case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 		XGBE_SET_ADV(dlks, 10000baseKR_Full);
 		break;
 	case XGBE_PORT_MODE_BACKPLANE_2500:
@@ -1874,6 +1878,7 @@ static enum xgbe_an_mode xgbe_phy_an_mode(struct xgbe_prv_data *pdata)
 	switch (phy_data->port_mode) {
 	case XGBE_PORT_MODE_BACKPLANE:
 		return XGBE_AN_MODE_CL73;
+	case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return XGBE_AN_MODE_NONE;
 	case XGBE_PORT_MODE_1000BASE_T:
@@ -2156,6 +2161,7 @@ static enum xgbe_mode xgbe_phy_switch_mode(struct xgbe_prv_data *pdata)
 
 	switch (phy_data->port_mode) {
 	case XGBE_PORT_MODE_BACKPLANE:
+	case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 		return xgbe_phy_switch_bp_mode(pdata);
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return xgbe_phy_switch_bp_2500_mode(pdata);
@@ -2251,6 +2257,7 @@ static enum xgbe_mode xgbe_phy_get_mode(struct xgbe_prv_data *pdata,
 
 	switch (phy_data->port_mode) {
 	case XGBE_PORT_MODE_BACKPLANE:
+	case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 		return xgbe_phy_get_bp_mode(speed);
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return xgbe_phy_get_bp_2500_mode(speed);
@@ -2426,6 +2433,7 @@ static bool xgbe_phy_use_mode(struct xgbe_prv_data *pdata, enum xgbe_mode mode)
 
 	switch (phy_data->port_mode) {
 	case XGBE_PORT_MODE_BACKPLANE:
+	case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 		return xgbe_phy_use_bp_mode(pdata, mode);
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return xgbe_phy_use_bp_2500_mode(pdata, mode);
@@ -2515,6 +2523,7 @@ static bool xgbe_phy_valid_speed(struct xgbe_prv_data *pdata, int speed)
 
 	switch (phy_data->port_mode) {
 	case XGBE_PORT_MODE_BACKPLANE:
+	case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 		return xgbe_phy_valid_speed_bp_mode(speed);
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		return xgbe_phy_valid_speed_bp_2500_mode(speed);
@@ -2792,6 +2801,7 @@ static bool xgbe_phy_port_mode_mismatch(struct xgbe_prv_data *pdata)
 
 	switch (phy_data->port_mode) {
 	case XGBE_PORT_MODE_BACKPLANE:
+	case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 		if ((phy_data->port_speeds & XGBE_PHY_PORT_SPEED_1000) ||
 		    (phy_data->port_speeds & XGBE_PHY_PORT_SPEED_10000))
 			return false;
@@ -2844,6 +2854,7 @@ static bool xgbe_phy_conn_type_mismatch(struct xgbe_prv_data *pdata)
 
 	switch (phy_data->port_mode) {
 	case XGBE_PORT_MODE_BACKPLANE:
+	case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 	case XGBE_PORT_MODE_BACKPLANE_2500:
 		if (phy_data->conn_type == XGBE_CONN_TYPE_BACKPLANE)
 			return false;
@@ -3160,6 +3171,8 @@ static int xgbe_phy_init(struct xgbe_prv_data *pdata)
 	/* Backplane support */
 	case XGBE_PORT_MODE_BACKPLANE:
 		XGBE_SET_SUP(lks, Autoneg);
+		fallthrough;
+	case XGBE_PORT_MODE_BACKPLANE_NO_AUTONEG:
 		XGBE_SET_SUP(lks, Pause);
 		XGBE_SET_SUP(lks, Asym_Pause);
 		XGBE_SET_SUP(lks, Backplane);
-- 
GitLab


From 1996cf46e4673a25ef2478eb266714f409a98221 Mon Sep 17 00:00:00 2001
From: Denis Efremov <efremov@linux.com>
Date: Wed, 2 Sep 2020 14:18:45 +0300
Subject: [PATCH 0955/1341] net: bcmgenet: fix mask check in
 bcmgenet_validate_flow()

VALIDATE_MASK(eth_mask->h_source) is checked twice in a row in
bcmgenet_validate_flow(). Add VALIDATE_MASK(eth_mask->h_dest)
instead.

Fixes: 3e370952287c ("net: bcmgenet: add support for ethtool rxnfc flows")
Signed-off-by: Denis Efremov <efremov@linux.com>
Acked-by: Doug Berger <opendmb@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index 1fecc25767bd0..d95f46ef80403 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -1364,7 +1364,7 @@ static int bcmgenet_validate_flow(struct net_device *dev,
 	case ETHER_FLOW:
 		eth_mask = &cmd->fs.m_u.ether_spec;
 		/* don't allow mask which isn't valid */
-		if (VALIDATE_MASK(eth_mask->h_source) ||
+		if (VALIDATE_MASK(eth_mask->h_dest) ||
 		    VALIDATE_MASK(eth_mask->h_source) ||
 		    VALIDATE_MASK(eth_mask->h_proto)) {
 			netdev_err(dev, "rxnfc: Unsupported mask\n");
-- 
GitLab


From 28b0865714b315e318ac45c4fc9156f3d4649646 Mon Sep 17 00:00:00 2001
From: Kamal Heib <kamalheib1@gmail.com>
Date: Wed, 2 Sep 2020 15:43:04 +0300
Subject: [PATCH 0956/1341] RDMA/core: Fix reported speed and width

When the returned speed from __ethtool_get_link_ksettings() is
SPEED_UNKNOWN this will lead to reporting a wrong speed and width for
providers that uses ib_get_eth_speed(), fix that by defaulting the
netdev_speed to SPEED_1000 in case the returned value from
__ethtool_get_link_ksettings() is SPEED_UNKNOWN.

Fixes: d41861942fc5 ("IB/core: Add generic function to extract IB speed from netdev")
Link: https://lore.kernel.org/r/20200902124304.170912-1-kamalheib1@gmail.com
Signed-off-by: Kamal Heib <kamalheib1@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/core/verbs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/core/verbs.c b/drivers/infiniband/core/verbs.c
index 3096e73797b77..307886737646e 100644
--- a/drivers/infiniband/core/verbs.c
+++ b/drivers/infiniband/core/verbs.c
@@ -1801,7 +1801,7 @@ int ib_get_eth_speed(struct ib_device *dev, u8 port_num, u8 *speed, u8 *width)
 
 	dev_put(netdev);
 
-	if (!rc) {
+	if (!rc && lksettings.base.speed != (u32)SPEED_UNKNOWN) {
 		netdev_speed = lksettings.base.speed;
 	} else {
 		netdev_speed = SPEED_1000;
-- 
GitLab


From eb0f3bc463d59d86402f19c59aa44e82dc3fab6d Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 2 Sep 2020 14:56:31 +0300
Subject: [PATCH 0957/1341] net: gemini: Fix another missing
 clk_disable_unprepare() in probe

We recently added some calls to clk_disable_unprepare() but we missed
the last error path if register_netdev() fails.

I made a couple cleanups so we avoid mistakes like this in the future.
First I reversed the "if (!ret)" condition and pulled the code in one
indent level.  Also, the "port->netdev = NULL;" is not required because
"port" isn't used again outside this function so I deleted that line.

Fixes: 4d5ae32f5e1e ("net: ethernet: Add a driver for Gemini gigabit ethernet")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/cortina/gemini.c | 34 +++++++++++++--------------
 1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/net/ethernet/cortina/gemini.c b/drivers/net/ethernet/cortina/gemini.c
index 62e271aea4a50..ffec0f3dd9578 100644
--- a/drivers/net/ethernet/cortina/gemini.c
+++ b/drivers/net/ethernet/cortina/gemini.c
@@ -2446,8 +2446,8 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
 	port->reset = devm_reset_control_get_exclusive(dev, NULL);
 	if (IS_ERR(port->reset)) {
 		dev_err(dev, "no reset\n");
-		clk_disable_unprepare(port->pclk);
-		return PTR_ERR(port->reset);
+		ret = PTR_ERR(port->reset);
+		goto unprepare;
 	}
 	reset_control_reset(port->reset);
 	usleep_range(100, 500);
@@ -2502,25 +2502,25 @@ static int gemini_ethernet_port_probe(struct platform_device *pdev)
 					IRQF_SHARED,
 					port_names[port->id],
 					port);
-	if (ret) {
-		clk_disable_unprepare(port->pclk);
-		return ret;
-	}
+	if (ret)
+		goto unprepare;
 
 	ret = register_netdev(netdev);
-	if (!ret) {
+	if (ret)
+		goto unprepare;
+
+	netdev_info(netdev,
+		    "irq %d, DMA @ 0x%pap, GMAC @ 0x%pap\n",
+		    port->irq, &dmares->start,
+		    &gmacres->start);
+	ret = gmac_setup_phy(netdev);
+	if (ret)
 		netdev_info(netdev,
-			    "irq %d, DMA @ 0x%pap, GMAC @ 0x%pap\n",
-			    port->irq, &dmares->start,
-			    &gmacres->start);
-		ret = gmac_setup_phy(netdev);
-		if (ret)
-			netdev_info(netdev,
-				    "PHY init failed, deferring to ifup time\n");
-		return 0;
-	}
+			    "PHY init failed, deferring to ifup time\n");
+	return 0;
 
-	port->netdev = NULL;
+unprepare:
+	clk_disable_unprepare(port->pclk);
 	return ret;
 }
 
-- 
GitLab


From 2b7bcd967a0f5b7ac9bb0c37b92de36e073dd119 Mon Sep 17 00:00:00 2001
From: Xie He <xie.he.0141@gmail.com>
Date: Wed, 2 Sep 2020 05:07:06 -0700
Subject: [PATCH 0958/1341] drivers/net/wan/hdlc: Change the default of
 hard_header_len to 0

Change the default value of hard_header_len in hdlc.c from 16 to 0.

Currently there are 6 HDLC protocol drivers, among them:

hdlc_raw_eth, hdlc_cisco, hdlc_ppp, hdlc_x25 set hard_header_len when
attaching the protocol, overriding the default. So this patch does not
affect them.

hdlc_raw and hdlc_fr don't set hard_header_len when attaching the
protocol. So this patch will change the hard_header_len of the HDLC
device for them from 16 to 0.

This is the correct change because both hdlc_raw and hdlc_fr don't have
header_ops, and the code in net/packet/af_packet.c expects the value of
hard_header_len to be consistent with header_ops.

In net/packet/af_packet.c, in the packet_snd function,
for AF_PACKET/DGRAM sockets it would reserve a headroom of
hard_header_len and call dev_hard_header to fill in that headroom,
and for AF_PACKET/RAW sockets, it does not reserve the headroom and
does not call dev_hard_header, but checks if the user has provided a
header of length hard_header_len (in function dev_validate_header).

Cc: Krzysztof Halasa <khc@pm.waw.pl>
Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/wan/hdlc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wan/hdlc.c b/drivers/net/wan/hdlc.c
index 386ed2aa31fd9..9b00708676cf7 100644
--- a/drivers/net/wan/hdlc.c
+++ b/drivers/net/wan/hdlc.c
@@ -229,7 +229,7 @@ static void hdlc_setup_dev(struct net_device *dev)
 	dev->min_mtu		 = 68;
 	dev->max_mtu		 = HDLC_MAX_MTU;
 	dev->type		 = ARPHRD_RAWHDLC;
-	dev->hard_header_len	 = 16;
+	dev->hard_header_len	 = 0;
 	dev->needed_headroom	 = 0;
 	dev->addr_len		 = 0;
 	dev->header_ops		 = &hdlc_null_ops;
-- 
GitLab


From 05d4487197b2b71d5363623c28924fd58c71c0b6 Mon Sep 17 00:00:00 2001
From: Ido Schimmel <idosch@nvidia.com>
Date: Wed, 2 Sep 2020 16:16:59 +0300
Subject: [PATCH 0959/1341] ipv6: Fix sysctl max for fib_multipath_hash_policy

Cited commit added the possible value of '2', but it cannot be set. Fix
it by adjusting the maximum value to '2'. This is consistent with the
corresponding IPv4 sysctl.

Before:

# sysctl -w net.ipv6.fib_multipath_hash_policy=2
sysctl: setting key "net.ipv6.fib_multipath_hash_policy": Invalid argument
net.ipv6.fib_multipath_hash_policy = 2
# sysctl net.ipv6.fib_multipath_hash_policy
net.ipv6.fib_multipath_hash_policy = 0

After:

# sysctl -w net.ipv6.fib_multipath_hash_policy=2
net.ipv6.fib_multipath_hash_policy = 2
# sysctl net.ipv6.fib_multipath_hash_policy
net.ipv6.fib_multipath_hash_policy = 2

Fixes: d8f74f0975d8 ("ipv6: Support multipath hashing on inner IP pkts")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Stephen Suryaputra <ssuryaextr@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/ipv6/sysctl_net_ipv6.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
index fac2135aa47b6..5b60a4bdd36af 100644
--- a/net/ipv6/sysctl_net_ipv6.c
+++ b/net/ipv6/sysctl_net_ipv6.c
@@ -21,6 +21,7 @@
 #include <net/calipso.h>
 #endif
 
+static int two = 2;
 static int flowlabel_reflect_max = 0x7;
 static int auto_flowlabels_min;
 static int auto_flowlabels_max = IP6_AUTO_FLOW_LABEL_MAX;
@@ -150,7 +151,7 @@ static struct ctl_table ipv6_table_template[] = {
 		.mode		= 0644,
 		.proc_handler   = proc_rt6_multipath_hash_policy,
 		.extra1		= SYSCTL_ZERO,
-		.extra2		= SYSCTL_ONE,
+		.extra2		= &two,
 	},
 	{
 		.procname	= "seg6_flowlabel",
-- 
GitLab


From 2a63866c8b51a3f72cea388dfac259d0e14c4ba6 Mon Sep 17 00:00:00 2001
From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date: Wed, 2 Sep 2020 22:44:16 +0900
Subject: [PATCH 0960/1341] tipc: fix shutdown() of connectionless socket

syzbot is reporting hung task at nbd_ioctl() [1], for there are two
problems regarding TIPC's connectionless socket's shutdown() operation.

----------
#include <fcntl.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <linux/nbd.h>
#include <unistd.h>

int main(int argc, char *argv[])
{
        const int fd = open("/dev/nbd0", 3);
        alarm(5);
        ioctl(fd, NBD_SET_SOCK, socket(PF_TIPC, SOCK_DGRAM, 0));
        ioctl(fd, NBD_DO_IT, 0); /* To be interrupted by SIGALRM. */
        return 0;
}
----------

One problem is that wait_for_completion() from flush_workqueue() from
nbd_start_device_ioctl() from nbd_ioctl() cannot be completed when
nbd_start_device_ioctl() received a signal at wait_event_interruptible(),
for tipc_shutdown() from kernel_sock_shutdown(SHUT_RDWR) from
nbd_mark_nsock_dead() from sock_shutdown() from nbd_start_device_ioctl()
is failing to wake up a WQ thread sleeping at wait_woken() from
tipc_wait_for_rcvmsg() from sock_recvmsg() from sock_xmit() from
nbd_read_stat() from recv_work() scheduled by nbd_start_device() from
nbd_start_device_ioctl(). Fix this problem by always invoking
sk->sk_state_change() (like inet_shutdown() does) when tipc_shutdown() is
called.

The other problem is that tipc_wait_for_rcvmsg() cannot return when
tipc_shutdown() is called, for tipc_shutdown() sets sk->sk_shutdown to
SEND_SHUTDOWN (despite "how" is SHUT_RDWR) while tipc_wait_for_rcvmsg()
needs sk->sk_shutdown set to RCV_SHUTDOWN or SHUTDOWN_MASK. Fix this
problem by setting sk->sk_shutdown to SHUTDOWN_MASK (like inet_shutdown()
does) when the socket is connectionless.

[1] https://syzkaller.appspot.com/bug?id=3fe51d307c1f0a845485cf1798aa059d12bf18b2

Reported-by: syzbot <syzbot+e36f41d207137b5d12f7@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/tipc/socket.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 07419f36116a8..d49c6173954a7 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -2771,18 +2771,21 @@ static int tipc_shutdown(struct socket *sock, int how)
 
 	trace_tipc_sk_shutdown(sk, NULL, TIPC_DUMP_ALL, " ");
 	__tipc_shutdown(sock, TIPC_CONN_SHUTDOWN);
-	sk->sk_shutdown = SEND_SHUTDOWN;
+	if (tipc_sk_type_connectionless(sk))
+		sk->sk_shutdown = SHUTDOWN_MASK;
+	else
+		sk->sk_shutdown = SEND_SHUTDOWN;
 
 	if (sk->sk_state == TIPC_DISCONNECTING) {
 		/* Discard any unreceived messages */
 		__skb_queue_purge(&sk->sk_receive_queue);
 
-		/* Wake up anyone sleeping in poll */
-		sk->sk_state_change(sk);
 		res = 0;
 	} else {
 		res = -ENOTCONN;
 	}
+	/* Wake up anyone sleeping in poll. */
+	sk->sk_state_change(sk);
 
 	release_sock(sk);
 	return res;
-- 
GitLab


From f614e536704d37326b0975da9cc33dd61d28c378 Mon Sep 17 00:00:00 2001
From: Louis Peens <louis.peens@netronome.com>
Date: Wed, 2 Sep 2020 17:04:58 +0200
Subject: [PATCH 0961/1341] nfp: flower: fix ABI mismatch between driver and
 firmware

Fix an issue where the driver wrongly detected ipv6 neighbour updates
from the NFP as corrupt. Add a reserved field on the kernel side so
it is similar to the ipv4 version of the struct and has space for the
extra bytes from the card.

Fixes: 9ea9bfa12240 ("nfp: flower: support ipv6 tunnel keep-alive messages from fw")
Signed-off-by: Louis Peens <louis.peens@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c b/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
index 2df3deedf9fd8..7248d248f6041 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c
@@ -61,6 +61,7 @@ struct nfp_tun_active_tuns {
  * @flags:		options part of the request
  * @tun_info.ipv6:		dest IPv6 address of active route
  * @tun_info.egress_port:	port the encapsulated packet egressed
+ * @tun_info.extra:		reserved for future use
  * @tun_info:		tunnels that have sent traffic in reported period
  */
 struct nfp_tun_active_tuns_v6 {
@@ -70,6 +71,7 @@ struct nfp_tun_active_tuns_v6 {
 	struct route_ip_info_v6 {
 		struct in6_addr ipv6;
 		__be32 egress_port;
+		__be32 extra[2];
 	} tun_info[];
 };
 
-- 
GitLab


From 8b4a11c67da538504d60ae917ffe5254f59b1248 Mon Sep 17 00:00:00 2001
From: Dan Murphy <dmurphy@ti.com>
Date: Wed, 2 Sep 2020 14:27:04 -0500
Subject: [PATCH 0962/1341] net: dp83867: Fix WoL SecureOn password

Fix the registers being written to as the values were being over written
when writing the same registers.

Fixes: caabee5b53f5 ("net: phy: dp83867: support Wake on LAN")
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/phy/dp83867.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c
index f3c04981b8da6..cd7032628a28c 100644
--- a/drivers/net/phy/dp83867.c
+++ b/drivers/net/phy/dp83867.c
@@ -215,9 +215,9 @@ static int dp83867_set_wol(struct phy_device *phydev,
 		if (wol->wolopts & WAKE_MAGICSECURE) {
 			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP1,
 				      (wol->sopass[1] << 8) | wol->sopass[0]);
-			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP1,
+			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP2,
 				      (wol->sopass[3] << 8) | wol->sopass[2]);
-			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP1,
+			phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RXFSOP3,
 				      (wol->sopass[5] << 8) | wol->sopass[4]);
 
 			val_rxcfg |= DP83867_WOL_SEC_EN;
-- 
GitLab


From ed43ffea78dcc97db3f561da834f1a49c8961e33 Mon Sep 17 00:00:00 2001
From: Hou Pu <houpu@bytedance.com>
Date: Wed, 29 Jul 2020 09:03:43 -0400
Subject: [PATCH 0963/1341] scsi: target: iscsi: Fix hang in iscsit_access_np()
 when getting tpg->np_login_sem

The iSCSI target login thread might get stuck with the following stack:

cat /proc/`pidof iscsi_np`/stack
[<0>] down_interruptible+0x42/0x50
[<0>] iscsit_access_np+0xe3/0x167
[<0>] iscsi_target_locate_portal+0x695/0x8ac
[<0>] __iscsi_target_login_thread+0x855/0xb82
[<0>] iscsi_target_login_thread+0x2f/0x5a
[<0>] kthread+0xfa/0x130
[<0>] ret_from_fork+0x1f/0x30

This can be reproduced via the following steps:

1. Initiator A tries to log in to iqn1-tpg1 on port 3260. After finishing
   PDU exchange in the login thread and before the negotiation is finished
   the the network link goes down. At this point A has not finished login
   and tpg->np_login_sem is held.

2. Initiator B tries to log in to iqn2-tpg1 on port 3260. After finishing
   PDU exchange in the login thread the target expects to process remaining
   login PDUs in workqueue context.

3. Initiator A' tries to log in to iqn1-tpg1 on port 3260 from a new
   socket. A' will wait for tpg->np_login_sem with np->np_login_timer
   loaded to wait for at most 15 seconds. The lock is held by A so A'
   eventually times out.

4. Before A' got timeout initiator B gets negotiation failed and calls
   iscsi_target_login_drop()->iscsi_target_login_sess_out().  The
   np->np_login_timer is canceled and initiator A' will hang forever.
   Because A' is now in the login thread, no new login requests can be
   serviced.

Fix this by moving iscsi_stop_login_thread_timer() out of
iscsi_target_login_sess_out(). Also remove iscsi_np parameter from
iscsi_target_login_sess_out().

Link: https://lore.kernel.org/r/20200729130343.24976-1-houpu@bytedance.com
Cc: stable@vger.kernel.org
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Hou Pu <houpu@bytedance.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/target/iscsi/iscsi_target_login.c | 6 +++---
 drivers/target/iscsi/iscsi_target_login.h | 3 +--
 drivers/target/iscsi/iscsi_target_nego.c  | 3 +--
 3 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/drivers/target/iscsi/iscsi_target_login.c b/drivers/target/iscsi/iscsi_target_login.c
index 85748e3388582..893d1b406c292 100644
--- a/drivers/target/iscsi/iscsi_target_login.c
+++ b/drivers/target/iscsi/iscsi_target_login.c
@@ -1149,7 +1149,7 @@ void iscsit_free_conn(struct iscsi_conn *conn)
 }
 
 void iscsi_target_login_sess_out(struct iscsi_conn *conn,
-		struct iscsi_np *np, bool zero_tsih, bool new_sess)
+				 bool zero_tsih, bool new_sess)
 {
 	if (!new_sess)
 		goto old_sess_out;
@@ -1167,7 +1167,6 @@ void iscsi_target_login_sess_out(struct iscsi_conn *conn,
 	conn->sess = NULL;
 
 old_sess_out:
-	iscsi_stop_login_thread_timer(np);
 	/*
 	 * If login negotiation fails check if the Time2Retain timer
 	 * needs to be restarted.
@@ -1407,8 +1406,9 @@ static int __iscsi_target_login_thread(struct iscsi_np *np)
 new_sess_out:
 	new_sess = true;
 old_sess_out:
+	iscsi_stop_login_thread_timer(np);
 	tpg_np = conn->tpg_np;
-	iscsi_target_login_sess_out(conn, np, zero_tsih, new_sess);
+	iscsi_target_login_sess_out(conn, zero_tsih, new_sess);
 	new_sess = false;
 
 	if (tpg) {
diff --git a/drivers/target/iscsi/iscsi_target_login.h b/drivers/target/iscsi/iscsi_target_login.h
index 3b8e3639ff5d0..fc95e6150253f 100644
--- a/drivers/target/iscsi/iscsi_target_login.h
+++ b/drivers/target/iscsi/iscsi_target_login.h
@@ -22,8 +22,7 @@ extern int iscsit_put_login_tx(struct iscsi_conn *, struct iscsi_login *, u32);
 extern void iscsit_free_conn(struct iscsi_conn *);
 extern int iscsit_start_kthreads(struct iscsi_conn *);
 extern void iscsi_post_login_handler(struct iscsi_np *, struct iscsi_conn *, u8);
-extern void iscsi_target_login_sess_out(struct iscsi_conn *, struct iscsi_np *,
-				bool, bool);
+extern void iscsi_target_login_sess_out(struct iscsi_conn *, bool, bool);
 extern int iscsi_target_login_thread(void *);
 extern void iscsi_handle_login_thread_timeout(struct timer_list *t);
 
diff --git a/drivers/target/iscsi/iscsi_target_nego.c b/drivers/target/iscsi/iscsi_target_nego.c
index f88a52fec8895..8b40f10976ff8 100644
--- a/drivers/target/iscsi/iscsi_target_nego.c
+++ b/drivers/target/iscsi/iscsi_target_nego.c
@@ -535,12 +535,11 @@ static bool iscsi_target_sk_check_and_clear(struct iscsi_conn *conn, unsigned in
 
 static void iscsi_target_login_drop(struct iscsi_conn *conn, struct iscsi_login *login)
 {
-	struct iscsi_np *np = login->np;
 	bool zero_tsih = login->zero_tsih;
 
 	iscsi_remove_failed_auth_entry(conn);
 	iscsi_target_nego_release(conn);
-	iscsi_target_login_sess_out(conn, np, zero_tsih, true);
+	iscsi_target_login_sess_out(conn, zero_tsih, true);
 }
 
 struct conn_timeout {
-- 
GitLab


From d2af39141eea34ef651961e885f49d96781a1016 Mon Sep 17 00:00:00 2001
From: Tomas Henzl <thenzl@redhat.com>
Date: Thu, 27 Aug 2020 18:53:32 +0200
Subject: [PATCH 0964/1341] scsi: megaraid_sas: Don't call disable_irq from
 process IRQ poll

disable_irq() might sleep. Replace it with disable_irq_nosync() which is
sufficient as irq_poll_scheduled protects against concurrently running
complete_cmd_fusion() from megasas_irqpoll() and megasas_isr_fusion().

Link: https://lore.kernel.org/r/20200827165332.8432-1-thenzl@redhat.com
Fixes: a6ffd5bf681 scsi: megaraid_sas: Call disable_irq from process IRQ poll
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/megaraid/megaraid_sas_fusion.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index 0824410f78f8a..0e143020a9fb7 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -3689,7 +3689,7 @@ int megasas_irqpoll(struct irq_poll *irqpoll, int budget)
 	instance = irq_ctx->instance;
 
 	if (irq_ctx->irq_line_enable) {
-		disable_irq(irq_ctx->os_irq);
+		disable_irq_nosync(irq_ctx->os_irq);
 		irq_ctx->irq_line_enable = false;
 	}
 
-- 
GitLab


From b614d55b970d08bcac5b0bc15a5526181b3e4459 Mon Sep 17 00:00:00 2001
From: Tomas Henzl <thenzl@redhat.com>
Date: Tue, 1 Sep 2020 16:50:26 +0200
Subject: [PATCH 0965/1341] scsi: mpt3sas: Don't call disable_irq from IRQ poll
 handler

disable_irq() might sleep, replace it with disable_irq_nosync(). For
synchronisation 'irq_poll_scheduled' is sufficient

Fixes: 320e77acb3 scsi: mpt3sas: Irq poll to avoid CPU hard lockups
Link: https://lore.kernel.org/r/20200901145026.12174-1-thenzl@redhat.com
Signed-off-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/mpt3sas/mpt3sas_base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/mpt3sas/mpt3sas_base.c b/drivers/scsi/mpt3sas/mpt3sas_base.c
index 1d64524cd8631..5850569a83964 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_base.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_base.c
@@ -1733,7 +1733,7 @@ _base_irqpoll(struct irq_poll *irqpoll, int budget)
 	reply_q = container_of(irqpoll, struct adapter_reply_queue,
 			irqpoll);
 	if (reply_q->irq_line_enable) {
-		disable_irq(reply_q->os_irq);
+		disable_irq_nosync(reply_q->os_irq);
 		reply_q->irq_line_enable = false;
 	}
 	num_entries = _base_process_reply_queue(reply_q);
-- 
GitLab


From 7e24969022cbd61ddc586f14824fc205661bb124 Mon Sep 17 00:00:00 2001
From: Ming Lei <ming.lei@redhat.com>
Date: Mon, 17 Aug 2020 18:00:55 +0800
Subject: [PATCH 0966/1341] block: allow for_each_bvec to support zero len bvec

Block layer usually doesn't support or allow zero-length bvec. Since
commit 1bdc76aea115 ("iov_iter: use bvec iterator to implement
iterate_bvec()"), iterate_bvec() switches to bvec iterator. However,
Al mentioned that 'Zero-length segments are not disallowed' in iov_iter.

Fixes for_each_bvec() so that it can move on after seeing one zero
length bvec.

Fixes: 1bdc76aea115 ("iov_iter: use bvec iterator to implement iterate_bvec()")
Reported-by: syzbot <syzbot+61acc40a49a3e46e25ea@syzkaller.appspotmail.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Tested-by: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: <stable@vger.kernel.org>
Link: https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg2262077.html
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 include/linux/bvec.h | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/include/linux/bvec.h b/include/linux/bvec.h
index ac0c7299d5b8a..dd74503f7e5ea 100644
--- a/include/linux/bvec.h
+++ b/include/linux/bvec.h
@@ -117,11 +117,18 @@ static inline bool bvec_iter_advance(const struct bio_vec *bv,
 	return true;
 }
 
+static inline void bvec_iter_skip_zero_bvec(struct bvec_iter *iter)
+{
+	iter->bi_bvec_done = 0;
+	iter->bi_idx++;
+}
+
 #define for_each_bvec(bvl, bio_vec, iter, start)			\
 	for (iter = (start);						\
 	     (iter).bi_size &&						\
 		((bvl = bvec_iter_bvec((bio_vec), (iter))), 1);	\
-	     bvec_iter_advance((bio_vec), &(iter), (bvl).bv_len))
+	     (bvl).bv_len ? (void)bvec_iter_advance((bio_vec), &(iter),	\
+		     (bvl).bv_len) : bvec_iter_skip_zero_bvec(&(iter)))
 
 /* for iterating one bio from start to end */
 #define BVEC_ITER_ALL_INIT (struct bvec_iter)				\
-- 
GitLab


From a73fbfce2cc28883f659414d598e6e60ca2214b4 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Wed, 26 Aug 2020 14:21:43 -0700
Subject: [PATCH 0967/1341] kconfig: streamline_config.pl: check defined(ENV
 variable) before using it

A user reported:
'Use of uninitialized value $ENV{"LMC_KEEP"} in split at
 ./scripts/kconfig/streamline_config.pl line 596.'

so first check that $ENV{LMC_KEEP} is defined before trying
to use it.

Fixes: c027b02d89fd ("streamline_config.pl: add LMC_KEEP to preserve some kconfigs")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/streamline_config.pl | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 19857d18d814d..1c78ba49ca992 100755
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -593,7 +593,10 @@ while ($repeat) {
 }
 
 my %setconfigs;
-my @preserved_kconfigs = split(/:/,$ENV{LMC_KEEP});
+my @preserved_kconfigs;
+if (defined($ENV{'LMC_KEEP'})) {
+	@preserved_kconfigs = split(/:/,$ENV{LMC_KEEP});
+}
 
 sub in_preserved_kconfigs {
     my $kconfig = $config2kfile{$_[0]};
-- 
GitLab


From b26ff488b5a8ed9fc3f606c1d04318132a431b0f Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Fri, 28 Aug 2020 10:26:26 -0700
Subject: [PATCH 0968/1341] kbuild: Documentation: clean up makefiles.rst

This is a general cleanup of kbuild/makefiles.rst:

* Use "Chapter" for major heading references and use "section" for
  the next-level heading references, for consistency.
* Section 3.8 was deleted long ago.
* Drop the ending ':' in section names in the contents list.
* Correct some section numbering references.
* Correct verb agreement typo.
* Fix run-on sentence punctuation.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 Documentation/kbuild/makefiles.rst | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/Documentation/kbuild/makefiles.rst b/Documentation/kbuild/makefiles.rst
index b81b8913a5a37..58d513a0fa95d 100644
--- a/Documentation/kbuild/makefiles.rst
+++ b/Documentation/kbuild/makefiles.rst
@@ -16,7 +16,7 @@ This document describes the Linux kernel Makefiles.
 	   --- 3.5 Library file goals - lib-y
 	   --- 3.6 Descending down in directories
 	   --- 3.7 Compilation flags
-	   --- 3.8 Command line dependency
+	   --- 3.8 <deleted>
 	   --- 3.9 Dependency tracking
 	   --- 3.10 Special Rules
 	   --- 3.11 $(CC) support functions
@@ -39,8 +39,8 @@ This document describes the Linux kernel Makefiles.
 
 	=== 7 Architecture Makefiles
 	   --- 7.1 Set variables to tweak the build to the architecture
-	   --- 7.2 Add prerequisites to archheaders:
-	   --- 7.3 Add prerequisites to archprepare:
+	   --- 7.2 Add prerequisites to archheaders
+	   --- 7.3 Add prerequisites to archprepare
 	   --- 7.4 List directories to visit when descending
 	   --- 7.5 Architecture-specific boot images
 	   --- 7.6 Building non-kbuild targets
@@ -129,7 +129,7 @@ The preferred name for the kbuild files are 'Makefile' but 'Kbuild' can
 be used and if both a 'Makefile' and a 'Kbuild' file exists, then the 'Kbuild'
 file will be used.
 
-Section 3.1 "Goal definitions" is a quick intro, further chapters provide
+Section 3.1 "Goal definitions" is a quick intro; further chapters provide
 more details, with real examples.
 
 3.1 Goal definitions
@@ -965,7 +965,7 @@ When kbuild executes, the following steps are followed (roughly):
 		KBUILD_LDFLAGS         := -m elf_s390
 
 	Note: ldflags-y can be used to further customise
-	the flags used. See chapter 3.7.
+	the flags used. See section 3.7.
 
     LDFLAGS_vmlinux
 	Options for $(LD) when linking vmlinux
@@ -1121,7 +1121,7 @@ When kbuild executes, the following steps are followed (roughly):
 
 	In this example, the file target maketools will be processed
 	before descending down in the subdirectories.
-	See also chapter XXX-TODO that describe how kbuild supports
+	See also chapter XXX-TODO that describes how kbuild supports
 	generating offset header files.
 
 
@@ -1261,7 +1261,7 @@ When kbuild executes, the following steps are followed (roughly):
 	always be built.
 	Assignments to $(targets) are without $(obj)/ prefix.
 	if_changed may be used in conjunction with custom commands as
-	defined in 6.8 "Custom kbuild commands".
+	defined in 7.8 "Custom kbuild commands".
 
 	Note: It is a typical mistake to forget the FORCE prerequisite.
 	Another common pitfall is that whitespace is sometimes
@@ -1411,7 +1411,7 @@ When kbuild executes, the following steps are followed (roughly):
 	that may be shared between individual architectures.
 	The recommended approach how to use a generic header file is
 	to list the file in the Kbuild file.
-	See "7.2 generic-y" for further info on syntax etc.
+	See "8.2 generic-y" for further info on syntax etc.
 
 7.11 Post-link pass
 -------------------
@@ -1601,4 +1601,4 @@ is the right choice.
 
 - Describe how kbuild supports shipped files with _shipped.
 - Generating offset header files.
-- Add more variables to section 7?
+- Add more variables to chapters 7 or 9?
-- 
GitLab


From 163e0c27fead96fd6804fa59a55fc4f841d38db8 Mon Sep 17 00:00:00 2001
From: Denis Efremov <efremov@linux.com>
Date: Mon, 31 Aug 2020 09:52:23 +0300
Subject: [PATCH 0969/1341] kconfig: remove redundant assignment prompt =
 prompt

Semi-automatic removing of localization macros changed the line
from "prompt = _(prompt);" to "prompt = prompt;". Drop the
reduntand assignment.

Fixes: 694c49a7c01c ("kconfig: drop localization support")
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/nconf.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/scripts/kconfig/nconf.c b/scripts/kconfig/nconf.c
index daf1c1506ec4c..e0f9655291665 100644
--- a/scripts/kconfig/nconf.c
+++ b/scripts/kconfig/nconf.c
@@ -755,7 +755,6 @@ static void build_conf(struct menu *menu)
 			switch (ptype) {
 			case P_MENU:
 				child_count++;
-				prompt = prompt;
 				if (single_menu_mode) {
 					item_make(menu, 'm',
 						"%s%*c%s",
-- 
GitLab


From 7c62235b95db29210814b771a05279121400af5e Mon Sep 17 00:00:00 2001
From: Kevin Wang <kevin1.wang@amd.com>
Date: Mon, 24 Aug 2020 16:50:12 +0800
Subject: [PATCH 0970/1341] drm/amd/pm: fix is_dpm_running() run error on 32bit
 system

v1:
the C type "unsigned long" size is 32bit on 32bit system,
it will cause code logic error, so replace it with "uint64_t".

v2:
remove duplicate cast operation.

Signed-off-by: Kevin <kevin1.wang@amd.com>
Suggest-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Jiansong Chen <Jiansong.Chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/powerplay/arcturus_ppt.c       | 10 +++++++---
 drivers/gpu/drm/amd/powerplay/navi10_ppt.c         | 10 +++++++---
 drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c | 10 +++++++---
 3 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
index fb962b9ceffb8..9582b38162f09 100644
--- a/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/arcturus_ppt.c
@@ -1840,10 +1840,14 @@ static bool arcturus_is_dpm_running(struct smu_context *smu)
 {
 	int ret = 0;
 	uint32_t feature_mask[2];
-	unsigned long feature_enabled;
+	uint64_t feature_enabled;
+
 	ret = smu_cmn_get_enabled_mask(smu, feature_mask, 2);
-	feature_enabled = (unsigned long)((uint64_t)feature_mask[0] |
-			   ((uint64_t)feature_mask[1] << 32));
+	if (ret)
+		return false;
+
+	feature_enabled = (uint64_t)feature_mask[1] << 32 | feature_mask[0];
+
 	return !!(feature_enabled & SMC_DPM_FEATURE);
 }
 
diff --git a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
index 9f62af9abd232..3d5eae956a23d 100644
--- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
@@ -1331,10 +1331,14 @@ static bool navi10_is_dpm_running(struct smu_context *smu)
 {
 	int ret = 0;
 	uint32_t feature_mask[2];
-	unsigned long feature_enabled;
+	uint64_t feature_enabled;
+
 	ret = smu_cmn_get_enabled_mask(smu, feature_mask, 2);
-	feature_enabled = (unsigned long)((uint64_t)feature_mask[0] |
-			   ((uint64_t)feature_mask[1] << 32));
+	if (ret)
+		return false;
+
+	feature_enabled = (uint64_t)feature_mask[1] << 32 | feature_mask[0];
+
 	return !!(feature_enabled & SMC_DPM_FEATURE);
 }
 
diff --git a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
index 638760839c150..1df03a35de826 100644
--- a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
@@ -1147,10 +1147,14 @@ static bool sienna_cichlid_is_dpm_running(struct smu_context *smu)
 {
 	int ret = 0;
 	uint32_t feature_mask[2];
-	unsigned long feature_enabled;
+	uint64_t feature_enabled;
+
 	ret = smu_cmn_get_enabled_mask(smu, feature_mask, 2);
-	feature_enabled = (unsigned long)((uint64_t)feature_mask[0] |
-			   ((uint64_t)feature_mask[1] << 32));
+	if (ret)
+		return false;
+
+	feature_enabled = (uint64_t)feature_mask[1] << 32 | feature_mask[0];
+
 	return !!(feature_enabled & SMC_DPM_FEATURE);
 }
 
-- 
GitLab


From 971df65cbf32da9bc9af52c1196ca504dd316086 Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Tue, 25 Aug 2020 13:51:29 +0800
Subject: [PATCH 0971/1341] drm/amd/pm: avoid false alarm due to confusing
 softwareshutdowntemp setting

Normally softwareshutdowntemp should be greater than Thotspotlimit.
However, on some VEGA10 ASIC, the softwareshutdowntemp is 91C while
Thotspotlimit is 105C. This seems not right and may trigger some
false alarms.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 .../gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c   | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
index d572ba4ec9b16..952cd3d7240e3 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega10_thermal.c
@@ -374,8 +374,18 @@ static int vega10_thermal_set_temperature_range(struct pp_hwmgr *hwmgr,
 	/* compare them in unit celsius degree */
 	if (low < range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES)
 		low = range->min / PP_TEMPERATURE_UNITS_PER_CENTIGRADES;
-	if (high > tdp_table->usSoftwareShutdownTemp)
-		high = tdp_table->usSoftwareShutdownTemp;
+
+	/*
+	 * As a common sense, usSoftwareShutdownTemp should be bigger
+	 * than ThotspotLimit. For any invalid usSoftwareShutdownTemp,
+	 * we will just use the max possible setting VEGA10_THERMAL_MAXIMUM_ALERT_TEMP
+	 * to avoid false alarms.
+	 */
+	if ((tdp_table->usSoftwareShutdownTemp >
+	     range->hotspot_crit_max / PP_TEMPERATURE_UNITS_PER_CENTIGRADES)) {
+		if (high > tdp_table->usSoftwareShutdownTemp)
+			high = tdp_table->usSoftwareShutdownTemp;
+	}
 
 	if (low > high)
 		return -EINVAL;
-- 
GitLab


From 33286b793b079c237ee73f7264294769ea0e8076 Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Thu, 27 Aug 2020 14:31:20 +0800
Subject: [PATCH 0972/1341] drm/amd/pm: enable MP0 DPM for sienna_cichlid

Enable MP0 clock DPM for sienna_cichlid.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
index 1df03a35de826..61f4ddae262dd 100644
--- a/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/sienna_cichlid_ppt.c
@@ -68,7 +68,8 @@
 	FEATURE_MASK(FEATURE_DPM_LINK_BIT)       | \
 	FEATURE_MASK(FEATURE_DPM_SOCCLK_BIT)     | \
 	FEATURE_MASK(FEATURE_DPM_FCLK_BIT)	 | \
-	FEATURE_MASK(FEATURE_DPM_DCEFCLK_BIT))
+	FEATURE_MASK(FEATURE_DPM_DCEFCLK_BIT)	 | \
+	FEATURE_MASK(FEATURE_DPM_MP0CLK_BIT))
 
 #define SMU_11_0_7_GFX_BUSY_THRESHOLD 15
 
@@ -229,6 +230,7 @@ sienna_cichlid_get_allowed_feature_mask(struct smu_context *smu,
 
 	*(uint64_t *)feature_mask |= FEATURE_MASK(FEATURE_DPM_PREFETCHER_BIT)
 				| FEATURE_MASK(FEATURE_DPM_FCLK_BIT)
+				| FEATURE_MASK(FEATURE_DPM_MP0CLK_BIT)
 				| FEATURE_MASK(FEATURE_DS_SOCCLK_BIT)
 				| FEATURE_MASK(FEATURE_DS_DCEFCLK_BIT)
 				| FEATURE_MASK(FEATURE_DS_FCLK_BIT)
-- 
GitLab


From f7b2e34b4afb8d712913dc199d3292ea9e078637 Mon Sep 17 00:00:00 2001
From: Sandeep Raghuraman <sandy.8925@gmail.com>
Date: Thu, 27 Aug 2020 17:07:33 +0530
Subject: [PATCH 0973/1341] drm/amdgpu: Specify get_argument function for
 ci_smu_funcs

Starting in Linux 5.8, the graphics and memory clock frequency were not being
reported for CIK cards. This is a regression, since they were reported correctly
in Linux 5.7.

After investigation, I discovered that the smum_send_msg_to_smc() function,
attempts to call the corresponding get_argument() function of ci_smu_funcs.
However, the get_argument() function is not defined in ci_smu_funcs.

This patch fixes the bug by specifying the correct get_argument() function.

Fixes: a0ec225633d9f6 ("drm/amd/powerplay: unified interfaces for message issuing and response checking")
Signed-off-by: Sandeep Raghuraman <sandy.8925@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/powerplay/smumgr/ci_smumgr.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/ci_smumgr.c b/drivers/gpu/drm/amd/powerplay/smumgr/ci_smumgr.c
index c18169aa59ce5..e4d1f3d66ef48 100644
--- a/drivers/gpu/drm/amd/powerplay/smumgr/ci_smumgr.c
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/ci_smumgr.c
@@ -37,6 +37,7 @@
 #include "cgs_common.h"
 #include "atombios.h"
 #include "pppcielanes.h"
+#include "smu7_smumgr.h"
 
 #include "smu/smu_7_0_1_d.h"
 #include "smu/smu_7_0_1_sh_mask.h"
@@ -2948,6 +2949,7 @@ const struct pp_smumgr_func ci_smu_funcs = {
 	.request_smu_load_specific_fw = NULL,
 	.send_msg_to_smc = ci_send_msg_to_smc,
 	.send_msg_to_smc_with_parameter = ci_send_msg_to_smc_with_parameter,
+	.get_argument = smu7_get_argument,
 	.download_pptable_settings = NULL,
 	.upload_pptable_settings = NULL,
 	.get_offsetof = ci_get_offsetof,
-- 
GitLab


From d98299885c9ea140c1108545186593deba36c4ac Mon Sep 17 00:00:00 2001
From: Sandeep Raghuraman <sandy.8925@gmail.com>
Date: Thu, 27 Aug 2020 18:43:37 +0530
Subject: [PATCH 0974/1341] drm/amdgpu: Fix bug in reporting voltage for CIK

On my R9 390, the voltage was reported as a constant 1000 mV.
This was due to a bug in smu7_hwmgr.c, in the smu7_read_sensor()
function, where some magic constants were used in a condition,
to determine whether the voltage should be read from PLANE2_VID
or PLANE1_VID. The VDDC mask was incorrectly used, instead of
the VDDGFX mask.

This patch changes the code to use the correct defined constants
(and apply the correct bitshift), thus resulting in correct voltage reporting.

Signed-off-by: Sandeep Raghuraman <sandy.8925@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
index ffe05b7cc1f0a..4a3b64aa21ceb 100644
--- a/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/smu7_hwmgr.c
@@ -3581,7 +3581,8 @@ static int smu7_read_sensor(struct pp_hwmgr *hwmgr, int idx,
 	case AMDGPU_PP_SENSOR_GPU_POWER:
 		return smu7_get_gpu_power(hwmgr, (uint32_t *)value);
 	case AMDGPU_PP_SENSOR_VDDGFX:
-		if ((data->vr_config & 0xff) == 0x2)
+		if ((data->vr_config & VRCONF_VDDGFX_MASK) ==
+		    (VR_SVI2_PLANE_2 << VRCONF_VDDGFX_SHIFT))
 			val_vid = PHM_READ_INDIRECT_FIELD(hwmgr->device,
 					CGS_IND_REG__SMC, PWR_SVI2_STATUS, PLANE2_VID);
 		else
-- 
GitLab


From fc8c70526bd30733ea8667adb8b8ffebea30a8ed Mon Sep 17 00:00:00 2001
From: Kai-Heng Feng <kai.heng.feng@canonical.com>
Date: Wed, 26 Aug 2020 01:33:48 +0800
Subject: [PATCH 0975/1341] drm/radeon: Prefer lower feedback dividers
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Commit 2e26ccb119bd ("drm/radeon: prefer lower reference dividers")
fixed screen flicker for HP Compaq nx9420 but breaks other laptops like
Asus X50SL.

Turns out we also need to favor lower feedback dividers.

Users confirmed this change fixes the regression and doesn't regress the
original fix.

Fixes: 2e26ccb119bd ("drm/radeon: prefer lower reference dividers")
BugLink: https://bugs.launchpad.net/bugs/1791312
BugLink: https://bugs.launchpad.net/bugs/1861554
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/radeon/radeon_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index e0ae911ef427d..7b69d6dfe44a3 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -933,7 +933,7 @@ static void avivo_get_fb_ref_div(unsigned nom, unsigned den, unsigned post_div,
 
 	/* get matching reference and feedback divider */
 	*ref_div = min(max(den/post_div, 1u), ref_div_max);
-	*fb_div = DIV_ROUND_CLOSEST(nom * *ref_div * post_div, den);
+	*fb_div = max(nom * *ref_div * post_div / den, 1u);
 
 	/* limit fb divider to its maximum */
 	if (*fb_div > fb_div_max) {
-- 
GitLab


From a255e9c8694d3ed240480d1b4d95d325a37358b3 Mon Sep 17 00:00:00 2001
From: Lyude Paul <lyude@redhat.com>
Date: Mon, 10 Aug 2020 17:18:37 -0400
Subject: [PATCH 0976/1341] drm/nouveau/kms/gv100-: Include correct push header
 in crcc37d.c

Looks like when we converted everything over to Nvidia's class headers,
we mistakenly included the nvif/push507b.h instead of nvif/pushc37b.h,
which resulted in breaking CRC reporting for volta+:

nouveau 0000:1f:00.0: disp: chid 0 stat 10003361 reason 3
[RESERVED_METHOD] mthd 0d84 data 00000000 code 00000000
nouveau 0000:1f:00.0: disp: chid 0 stat 10003360 reason 3
[RESERVED_METHOD] mthd 0d80 data 00000000 code 00000000
nouveau 0000:1f:00.0: DRM: CRC notifier ctx for head 3 not finished
after 50ms

So, fix that.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Fixes: c4b27bc8682c ("drm/nouveau/kms/nv50-: convert core crc_set_src() to new push macros")
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---
 drivers/gpu/drm/nouveau/dispnv50/crcc37d.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/crcc37d.c b/drivers/gpu/drm/nouveau/dispnv50/crcc37d.c
index 9afe9a87bde0c..814e5bd974460 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/crcc37d.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/crcc37d.c
@@ -6,7 +6,7 @@
 #include "disp.h"
 #include "head.h"
 
-#include <nvif/push507c.h>
+#include <nvif/pushc37b.h>
 
 #include <nvhw/class/clc37d.h>
 
-- 
GitLab


From 35dde8d406369486e54cd628b0b3e6547bfb93a6 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs@redhat.com>
Date: Mon, 10 Aug 2020 10:48:20 +1000
Subject: [PATCH 0977/1341] drm/nouveau/kms/nv50-: add some whitespace before
 debug message

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---
 drivers/gpu/drm/nouveau/include/nvif/push507c.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/include/nvif/push507c.h b/drivers/gpu/drm/nouveau/include/nvif/push507c.h
index 889467f13fd9c..7917bead4845d 100644
--- a/drivers/gpu/drm/nouveau/include/nvif/push507c.h
+++ b/drivers/gpu/drm/nouveau/include/nvif/push507c.h
@@ -20,6 +20,6 @@
         PUSH_ASSERT(!((o) & ~DRF_SMASK(NV507C_DMA_JUMP_OFFSET)), "offset"); \
 	PUSH_DATA__((p), NVDEF(NV507C, DMA, OPCODE, JUMP) |                 \
 			 NVVAL(NV507C, DMA, JUMP_OFFSET, (o) >> 2),         \
-		    "jump 0x%08x - %s", (u32)(o), __func__);                \
+		    " jump 0x%08x - %s", (u32)(o), __func__);               \
 } while(0)
 #endif
-- 
GitLab


From a9cfcfcad50c7bf4ef7335a3eefba8d989d15c06 Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs@redhat.com>
Date: Tue, 11 Aug 2020 10:11:38 +1000
Subject: [PATCH 0978/1341] drm/nouveau/kms/nv50-gp1xx: disable notifies again
 after core update

This was lost during the header conversion.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---
 drivers/gpu/drm/nouveau/dispnv50/core507d.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/core507d.c b/drivers/gpu/drm/nouveau/dispnv50/core507d.c
index ad1f09a143aa4..248edf69e1683 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/core507d.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/core507d.c
@@ -50,7 +50,10 @@ core507d_update(struct nv50_core *core, u32 *interlock, bool ntfy)
 					interlock[NV50_DISP_INTERLOCK_OVLY] |
 		  NVDEF(NV507D, UPDATE, NOT_DRIVER_FRIENDLY, FALSE) |
 		  NVDEF(NV507D, UPDATE, NOT_DRIVER_UNFRIENDLY, FALSE) |
-		  NVDEF(NV507D, UPDATE, INHIBIT_INTERRUPTS, FALSE));
+		  NVDEF(NV507D, UPDATE, INHIBIT_INTERRUPTS, FALSE),
+
+				SET_NOTIFIER_CONTROL,
+		  NVDEF(NV507D, SET_NOTIFIER_CONTROL, NOTIFY, DISABLE));
 
 	return PUSH_KICK(push);
 }
-- 
GitLab


From ca386aa7155a5467fa7b2b8376f4da8f8e59be4d Mon Sep 17 00:00:00 2001
From: Ben Skeggs <bskeggs@redhat.com>
Date: Wed, 2 Sep 2020 15:30:33 +1000
Subject: [PATCH 0979/1341] drm/nouveau/kms/nv50-gp1xx: add WAR for EVO push
 buffer HW bug

Thanks to NVIDIA for confirming this workaround, and clarifying which HW
is affected.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Tested-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
---
 drivers/gpu/drm/nouveau/dispnv50/disp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
index e7874877da858..1ed2420700011 100644
--- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
+++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
@@ -257,6 +257,12 @@ nv50_dmac_create(struct nvif_device *device, struct nvif_object *disp,
 	dmac->push->end = dmac->push->bgn;
 	dmac->max = 0x1000/4 - 1;
 
+	/* EVO channels are affected by a HW bug where the last 12 DWORDs
+	 * of the push buffer aren't able to be used safely.
+	 */
+	if (disp->oclass < GV100_DISP)
+		dmac->max -= 12;
+
 	args->pushbuf = nvif_handle(&dmac->_push.mem.object);
 
 	ret = nv50_chan_create(device, disp, oclass, head, data, size,
-- 
GitLab


From 4c62285439f80f8996c38e0bda79b1125a192365 Mon Sep 17 00:00:00 2001
From: Michael Ellerman <mpe@ellerman.id.au>
Date: Wed, 2 Sep 2020 22:14:39 +1000
Subject: [PATCH 0980/1341] Revert "powerpc/build: vdso linker warning for
 orphan sections"

This reverts commit f2af201002a8bc22500c04cc474ea480bf361351.

It added a usage of cc-ldoption, but cc-ldoption was removed in commit
055efab3120b ("kbuild: drop support for cc-ldoption").

Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
---
 arch/powerpc/kernel/vdso32/Makefile     | 2 +-
 arch/powerpc/kernel/vdso32/vdso32.lds.S | 1 -
 arch/powerpc/kernel/vdso64/Makefile     | 2 +-
 arch/powerpc/kernel/vdso64/vdso64.lds.S | 3 +--
 4 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/powerpc/kernel/vdso32/Makefile b/arch/powerpc/kernel/vdso32/Makefile
index 87ab1152d5ce5..e147bbdc12cdf 100644
--- a/arch/powerpc/kernel/vdso32/Makefile
+++ b/arch/powerpc/kernel/vdso32/Makefile
@@ -50,7 +50,7 @@ $(obj-vdso32): %.o: %.S FORCE
 
 # actual build commands
 quiet_cmd_vdso32ld = VDSO32L $@
-      cmd_vdso32ld = $(VDSOCC) $(c_flags) $(CC32FLAGS) -o $@ $(call cc-ldoption, -Wl$(comma)--orphan-handling=warn) -Wl,-T$(filter %.lds,$^) $(filter %.o,$^)
+      cmd_vdso32ld = $(VDSOCC) $(c_flags) $(CC32FLAGS) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^)
 quiet_cmd_vdso32as = VDSO32A $@
       cmd_vdso32as = $(VDSOCC) $(a_flags) $(CC32FLAGS) -c -o $@ $<
 
diff --git a/arch/powerpc/kernel/vdso32/vdso32.lds.S b/arch/powerpc/kernel/vdso32/vdso32.lds.S
index 4c985467a6680..5206c2eb2a1de 100644
--- a/arch/powerpc/kernel/vdso32/vdso32.lds.S
+++ b/arch/powerpc/kernel/vdso32/vdso32.lds.S
@@ -111,7 +111,6 @@ SECTIONS
 		*(.note.GNU-stack)
 		*(.data .data.* .gnu.linkonce.d.* .sdata*)
 		*(.bss .sbss .dynbss .dynsbss)
-		*(.glink .iplt .plt .rela*)
 	}
 }
 
diff --git a/arch/powerpc/kernel/vdso64/Makefile b/arch/powerpc/kernel/vdso64/Makefile
index 38c317f251417..32ebb3522ea19 100644
--- a/arch/powerpc/kernel/vdso64/Makefile
+++ b/arch/powerpc/kernel/vdso64/Makefile
@@ -34,7 +34,7 @@ $(obj)/%.so: $(obj)/%.so.dbg FORCE
 
 # actual build commands
 quiet_cmd_vdso64ld = VDSO64L $@
-      cmd_vdso64ld = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^) $(call cc-ldoption, -Wl$(comma)--orphan-handling=warn)
+      cmd_vdso64ld = $(CC) $(c_flags) -o $@ -Wl,-T$(filter %.lds,$^) $(filter %.o,$^)
 
 # install commands for the unstripped file
 quiet_cmd_vdso_install = INSTALL $@
diff --git a/arch/powerpc/kernel/vdso64/vdso64.lds.S b/arch/powerpc/kernel/vdso64/vdso64.lds.S
index 4e3a8d4ee6140..256fb97202987 100644
--- a/arch/powerpc/kernel/vdso64/vdso64.lds.S
+++ b/arch/powerpc/kernel/vdso64/vdso64.lds.S
@@ -30,7 +30,7 @@ SECTIONS
 	. = ALIGN(16);
 	.text		: {
 		*(.text .stub .text.* .gnu.linkonce.t.* __ftr_alt_*)
-		*(.sfpr)
+		*(.sfpr .glink)
 	}						:text
 	PROVIDE(__etext = .);
 	PROVIDE(_etext = .);
@@ -111,7 +111,6 @@ SECTIONS
 		*(.branch_lt)
 		*(.data .data.* .gnu.linkonce.d.* .sdata*)
 		*(.bss .sbss .dynbss .dynsbss)
-		*(.glink .iplt .plt .rela*)
 	}
 }
 
-- 
GitLab


From 46815bf4d5a2e6ed64e4fa636c7d13f025bf40d8 Mon Sep 17 00:00:00 2001
From: Peter Ujfalusi <peter.ujfalusi@ti.com>
Date: Mon, 31 Aug 2020 12:10:19 +0300
Subject: [PATCH 0981/1341] dmaengine: ti: k3-udma: Update rchan_oes_offset for
 am654 SYSFW ABI 3.0

SYSFW ABI 3.0 has changed the rchan_oes_offset value for am654 to support
SR2.

Since the kernel now needs SYSFW API 3.0 to work because the merged irqchip
update, we need to also update the am654 rchan_oes_offset.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20200831091019.25273-1-peter.ujfalusi@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/dma/ti/k3-udma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 30cb514cee545..d86dba0fd8e6b 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -3101,14 +3101,14 @@ static struct udma_match_data am654_main_data = {
 	.psil_base = 0x1000,
 	.enable_memcpy_support = true,
 	.statictr_z_mask = GENMASK(11, 0),
-	.rchan_oes_offset = 0x2000,
+	.rchan_oes_offset = 0x200,
 };
 
 static struct udma_match_data am654_mcu_data = {
 	.psil_base = 0x6000,
 	.enable_memcpy_support = false,
 	.statictr_z_mask = GENMASK(11, 0),
-	.rchan_oes_offset = 0x2000,
+	.rchan_oes_offset = 0x200,
 };
 
 static struct udma_match_data j721e_main_data = {
-- 
GitLab


From b1910c6b9983817160e04d4e87b2dc1413c5361a Mon Sep 17 00:00:00 2001
From: Matthias Kaehlcke <mka@chromium.org>
Date: Wed, 29 Jul 2020 10:50:12 -0700
Subject: [PATCH 0982/1341] interconnect: Show bandwidth for disabled paths as
 zero in debugfs

For disabled paths the 'interconnect_summary' in debugfs currently shows
the orginally requested bandwidths. This is confusing, since the bandwidth
requests aren't active. Instead show the bandwidths for disabled
paths/requests as zero.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Evan Green <evgreen@chromium.org>
Link: https://lore.kernel.org/r/20200729104933.1.If8e80e4c0c7ddf99056f6e726e59505ed4e127f3@changeid
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
---
 drivers/interconnect/core.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index befd111049c0e..cf07491b7415b 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -55,12 +55,18 @@ static int icc_summary_show(struct seq_file *s, void *data)
 
 			icc_summary_show_one(s, n);
 			hlist_for_each_entry(r, &n->req_list, req_node) {
+				u32 avg_bw = 0, peak_bw = 0;
+
 				if (!r->dev)
 					continue;
 
+				if (r->enabled) {
+					avg_bw = r->avg_bw;
+					peak_bw = r->peak_bw;
+				}
+
 				seq_printf(s, "  %-27s %12u %12u %12u\n",
-					   dev_name(r->dev), r->tag, r->avg_bw,
-					   r->peak_bw);
+					   dev_name(r->dev), r->tag, avg_bw, peak_bw);
 			}
 		}
 	}
-- 
GitLab


From 3fbbf2148a406b3e350fe91e6fdd78eb42ecad24 Mon Sep 17 00:00:00 2001
From: Tom Rix <trix@redhat.com>
Date: Wed, 2 Sep 2020 13:26:50 -0700
Subject: [PATCH 0983/1341] soundwire: fix double free of dangling pointer

clang static analysis flags this problem

stream.c:844:9: warning: Use of memory after
  it is freed
        kfree(bus->defer_msg.msg->buf);
              ^~~~~~~~~~~~~~~~~~~~~~~

This happens in an error handler cleaning up memory
allocated for elements in a list.

	list_for_each_entry(m_rt, &stream->master_list, stream_node) {
		bus = m_rt->bus;

		kfree(bus->defer_msg.msg->buf);
		kfree(bus->defer_msg.msg);
	}

And is triggered when the call to sdw_bank_switch() fails.
There are a two problems.

First, when sdw_bank_switch() fails, though it frees memory it
does not clear bus's reference 'defer_msg.msg' to that memory.

The second problem is the freeing msg->buf. In some cases
msg will be NULL so this will dereference a null pointer.
Need to check before freeing.

Fixes: 99b8a5d608a6 ("soundwire: Add bank switch routine")
Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200902202650.14189-1-trix@redhat.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
---
 drivers/soundwire/stream.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 37290a799023c..6e36deb505b1e 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -717,6 +717,7 @@ static int sdw_bank_switch(struct sdw_bus *bus, int m_rt_count)
 	kfree(wbuf);
 error_1:
 	kfree(wr_msg);
+	bus->defer_msg.msg = NULL;
 	return ret;
 }
 
@@ -840,9 +841,10 @@ static int do_bank_switch(struct sdw_stream_runtime *stream)
 error:
 	list_for_each_entry(m_rt, &stream->master_list, stream_node) {
 		bus = m_rt->bus;
-
-		kfree(bus->defer_msg.msg->buf);
-		kfree(bus->defer_msg.msg);
+		if (bus->defer_msg.msg) {
+			kfree(bus->defer_msg.msg->buf);
+			kfree(bus->defer_msg.msg);
+		}
 	}
 
 msg_unlock:
-- 
GitLab


From aef0148f3606117352053c015cb33734e9ee7397 Mon Sep 17 00:00:00 2001
From: Arvind Sankar <nivedita@alum.mit.edu>
Date: Wed, 2 Sep 2020 22:30:56 -0400
Subject: [PATCH 0984/1341] x86/cmdline: Disable jump tables for cmdline.c

When CONFIG_RETPOLINE is disabled, Clang uses a jump table for the
switch statement in cmdline_find_option (jump tables are disabled when
CONFIG_RETPOLINE is enabled). This function is called very early in boot
from sme_enable() if CONFIG_AMD_MEM_ENCRYPT is enabled. At this time,
the kernel is still executing out of the identity mapping, but the jump
table will contain virtual addresses.

Fix this by disabling jump tables for cmdline.c when AMD_MEM_ENCRYPT is
enabled.

Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200903023056.3914690-1-nivedita@alum.mit.edu
---
 arch/x86/lib/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile
index d46fff11f06fa..aa067859a70b6 100644
--- a/arch/x86/lib/Makefile
+++ b/arch/x86/lib/Makefile
@@ -24,7 +24,7 @@ ifdef CONFIG_FUNCTION_TRACER
 CFLAGS_REMOVE_cmdline.o = -pg
 endif
 
-CFLAGS_cmdline.o := -fno-stack-protector
+CFLAGS_cmdline.o := -fno-stack-protector -fno-jump-tables
 endif
 
 inat_tables_script = $(srctree)/arch/x86/tools/gen-insn-attr-x86.awk
-- 
GitLab


From 23870f1227680d2aacff6f79c3ab2222bd04e86e Mon Sep 17 00:00:00 2001
From: "peterz@infradead.org" <peterz@infradead.org>
Date: Wed, 2 Sep 2020 18:03:23 +0200
Subject: [PATCH 0985/1341] locking/lockdep: Fix "USED" <- "IN-NMI" inversions

During the LPC RCU BoF Paul asked how come the "USED" <- "IN-NMI"
detector doesn't trip over rcu_read_lock()'s lockdep annotation.

Looking into this I found a very embarrasing typo in
verify_lock_unused():

	-	if (!(class->usage_mask & LOCK_USED))
	+	if (!(class->usage_mask & LOCKF_USED))

fixing that will indeed cause rcu_read_lock() to insta-splat :/

The above typo means that instead of testing for: 0x100 (1 <<
LOCK_USED), we test for 8 (LOCK_USED), which corresponds to (1 <<
LOCK_ENABLED_HARDIRQ).

So instead of testing for _any_ used lock, it will only match any lock
used with interrupts enabled.

The rcu_read_lock() annotation uses .check=0, which means it will not
set any of the interrupt bits and will thus never match.

In order to properly fix the situation and allow rcu_read_lock() to
correctly work, split LOCK_USED into LOCK_USED and LOCK_USED_READ and by
having .read users set USED_READ and test USED, pure read-recursive
locks are permitted.

Fixes: f6f48e180404 ("lockdep: Teach lockdep about "USED" <- "IN-NMI" inversions")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Link: https://lore.kernel.org/r/20200902160323.GK1362448@hirez.programming.kicks-ass.net
---
 kernel/locking/lockdep.c           | 35 +++++++++++++++++++++++++-----
 kernel/locking/lockdep_internals.h |  2 ++
 2 files changed, 31 insertions(+), 6 deletions(-)

diff --git a/kernel/locking/lockdep.c b/kernel/locking/lockdep.c
index 54b74fabf40c7..2facbbd146ec2 100644
--- a/kernel/locking/lockdep.c
+++ b/kernel/locking/lockdep.c
@@ -3969,13 +3969,18 @@ static int separate_irq_context(struct task_struct *curr,
 static int mark_lock(struct task_struct *curr, struct held_lock *this,
 			     enum lock_usage_bit new_bit)
 {
-	unsigned int new_mask = 1 << new_bit, ret = 1;
+	unsigned int old_mask, new_mask, ret = 1;
 
 	if (new_bit >= LOCK_USAGE_STATES) {
 		DEBUG_LOCKS_WARN_ON(1);
 		return 0;
 	}
 
+	if (new_bit == LOCK_USED && this->read)
+		new_bit = LOCK_USED_READ;
+
+	new_mask = 1 << new_bit;
+
 	/*
 	 * If already set then do not dirty the cacheline,
 	 * nor do any checks:
@@ -3988,13 +3993,22 @@ static int mark_lock(struct task_struct *curr, struct held_lock *this,
 	/*
 	 * Make sure we didn't race:
 	 */
-	if (unlikely(hlock_class(this)->usage_mask & new_mask)) {
-		graph_unlock();
-		return 1;
-	}
+	if (unlikely(hlock_class(this)->usage_mask & new_mask))
+		goto unlock;
 
+	old_mask = hlock_class(this)->usage_mask;
 	hlock_class(this)->usage_mask |= new_mask;
 
+	/*
+	 * Save one usage_traces[] entry and map both LOCK_USED and
+	 * LOCK_USED_READ onto the same entry.
+	 */
+	if (new_bit == LOCK_USED || new_bit == LOCK_USED_READ) {
+		if (old_mask & (LOCKF_USED | LOCKF_USED_READ))
+			goto unlock;
+		new_bit = LOCK_USED;
+	}
+
 	if (!(hlock_class(this)->usage_traces[new_bit] = save_trace()))
 		return 0;
 
@@ -4008,6 +4022,7 @@ static int mark_lock(struct task_struct *curr, struct held_lock *this,
 			return 0;
 	}
 
+unlock:
 	graph_unlock();
 
 	/*
@@ -4942,12 +4957,20 @@ static void verify_lock_unused(struct lockdep_map *lock, struct held_lock *hlock
 {
 #ifdef CONFIG_PROVE_LOCKING
 	struct lock_class *class = look_up_lock_class(lock, subclass);
+	unsigned long mask = LOCKF_USED;
 
 	/* if it doesn't have a class (yet), it certainly hasn't been used yet */
 	if (!class)
 		return;
 
-	if (!(class->usage_mask & LOCK_USED))
+	/*
+	 * READ locks only conflict with USED, such that if we only ever use
+	 * READ locks, there is no deadlock possible -- RCU.
+	 */
+	if (!hlock->read)
+		mask |= LOCKF_USED_READ;
+
+	if (!(class->usage_mask & mask))
 		return;
 
 	hlock->class_idx = class - lock_classes;
diff --git a/kernel/locking/lockdep_internals.h b/kernel/locking/lockdep_internals.h
index baca699b94e91..b0be1560ed17a 100644
--- a/kernel/locking/lockdep_internals.h
+++ b/kernel/locking/lockdep_internals.h
@@ -19,6 +19,7 @@ enum lock_usage_bit {
 #include "lockdep_states.h"
 #undef LOCKDEP_STATE
 	LOCK_USED,
+	LOCK_USED_READ,
 	LOCK_USAGE_STATES
 };
 
@@ -40,6 +41,7 @@ enum {
 #include "lockdep_states.h"
 #undef LOCKDEP_STATE
 	__LOCKF(USED)
+	__LOCKF(USED_READ)
 };
 
 #define LOCKDEP_STATE(__STATE)	LOCKF_ENABLED_##__STATE |
-- 
GitLab


From 4819e15f740ec884a50bdc431d7f1e7638b6f7d9 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@suse.de>
Date: Wed, 2 Sep 2020 17:59:04 +0200
Subject: [PATCH 0986/1341] x86/mm/32: Bring back vmalloc faulting on x86_32

One can not simply remove vmalloc faulting on x86-32. Upstream

	commit: 7f0a002b5a21 ("x86/mm: remove vmalloc faulting")

removed it on x86 alltogether because previously the
arch_sync_kernel_mappings() interface was introduced. This interface
added synchronization of vmalloc/ioremap page-table updates to all
page-tables in the system at creation time and was thought to make
vmalloc faulting obsolete.

But that assumption was incredibly naive.

It turned out that there is a race window between the time the vmalloc
or ioremap code establishes a mapping and the time it synchronizes
this change to other page-tables in the system.

During this race window another CPU or thread can establish a vmalloc
mapping which uses the same intermediate page-table entries (e.g. PMD
or PUD) and does no synchronization in the end, because it found all
necessary mappings already present in the kernel reference page-table.

But when these intermediate page-table entries are not yet
synchronized, the other CPU or thread will continue with a vmalloc
address that is not yet mapped in the page-table it currently uses,
causing an unhandled page fault and oops like below:

	BUG: unable to handle page fault for address: fe80c000
	#PF: supervisor write access in kernel mode
	#PF: error_code(0x0002) - not-present page
	*pde = 33183067 *pte = a8648163
	Oops: 0002 [#1] SMP
	CPU: 1 PID: 13514 Comm: cve-2017-17053 Tainted: G
	...
	Call Trace:
	 ldt_dup_context+0x66/0x80
	 dup_mm+0x2b3/0x480
	 copy_process+0x133b/0x15c0
	 _do_fork+0x94/0x3e0
	 __ia32_sys_clone+0x67/0x80
	 __do_fast_syscall_32+0x3f/0x70
	 do_fast_syscall_32+0x29/0x60
	 do_SYSENTER_32+0x15/0x20
	 entry_SYSENTER_32+0x9f/0xf2
	EIP: 0xb7eef549

So the arch_sync_kernel_mappings() interface is racy, but removing it
would mean to re-introduce the vmalloc_sync_all() interface, which is
even more awful. Keep arch_sync_kernel_mappings() in place and catch
the race condition in the page-fault handler instead.

Do a partial revert of above commit to get vmalloc faulting on x86-32
back in place.

Fixes: 7f0a002b5a21 ("x86/mm: remove vmalloc faulting")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200902155904.17544-1-joro@8bytes.org
---
 arch/x86/mm/fault.c | 78 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 35f1498e98324..6e3e8a1249031 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -190,6 +190,53 @@ static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
 	return pmd_k;
 }
 
+/*
+ *   Handle a fault on the vmalloc or module mapping area
+ *
+ *   This is needed because there is a race condition between the time
+ *   when the vmalloc mapping code updates the PMD to the point in time
+ *   where it synchronizes this update with the other page-tables in the
+ *   system.
+ *
+ *   In this race window another thread/CPU can map an area on the same
+ *   PMD, finds it already present and does not synchronize it with the
+ *   rest of the system yet. As a result v[mz]alloc might return areas
+ *   which are not mapped in every page-table in the system, causing an
+ *   unhandled page-fault when they are accessed.
+ */
+static noinline int vmalloc_fault(unsigned long address)
+{
+	unsigned long pgd_paddr;
+	pmd_t *pmd_k;
+	pte_t *pte_k;
+
+	/* Make sure we are in vmalloc area: */
+	if (!(address >= VMALLOC_START && address < VMALLOC_END))
+		return -1;
+
+	/*
+	 * Synchronize this task's top level page-table
+	 * with the 'reference' page table.
+	 *
+	 * Do _not_ use "current" here. We might be inside
+	 * an interrupt in the middle of a task switch..
+	 */
+	pgd_paddr = read_cr3_pa();
+	pmd_k = vmalloc_sync_one(__va(pgd_paddr), address);
+	if (!pmd_k)
+		return -1;
+
+	if (pmd_large(*pmd_k))
+		return 0;
+
+	pte_k = pte_offset_kernel(pmd_k, address);
+	if (!pte_present(*pte_k))
+		return -1;
+
+	return 0;
+}
+NOKPROBE_SYMBOL(vmalloc_fault);
+
 void arch_sync_kernel_mappings(unsigned long start, unsigned long end)
 {
 	unsigned long addr;
@@ -1110,6 +1157,37 @@ do_kern_addr_fault(struct pt_regs *regs, unsigned long hw_error_code,
 	 */
 	WARN_ON_ONCE(hw_error_code & X86_PF_PK);
 
+#ifdef CONFIG_X86_32
+	/*
+	 * We can fault-in kernel-space virtual memory on-demand. The
+	 * 'reference' page table is init_mm.pgd.
+	 *
+	 * NOTE! We MUST NOT take any locks for this case. We may
+	 * be in an interrupt or a critical region, and should
+	 * only copy the information from the master page table,
+	 * nothing more.
+	 *
+	 * Before doing this on-demand faulting, ensure that the
+	 * fault is not any of the following:
+	 * 1. A fault on a PTE with a reserved bit set.
+	 * 2. A fault caused by a user-mode access.  (Do not demand-
+	 *    fault kernel memory due to user-mode accesses).
+	 * 3. A fault caused by a page-level protection violation.
+	 *    (A demand fault would be on a non-present page which
+	 *     would have X86_PF_PROT==0).
+	 *
+	 * This is only needed to close a race condition on x86-32 in
+	 * the vmalloc mapping/unmapping code. See the comment above
+	 * vmalloc_fault() for details. On x86-64 the race does not
+	 * exist as the vmalloc mappings don't need to be synchronized
+	 * there.
+	 */
+	if (!(hw_error_code & (X86_PF_RSVD | X86_PF_USER | X86_PF_PROT))) {
+		if (vmalloc_fault(address) >= 0)
+			return;
+	}
+#endif
+
 	/* Was the fault spurious, caused by lazy TLB invalidation? */
 	if (spurious_kernel_fault(hw_error_code, address))
 		return;
-- 
GitLab


From 318af7b80b6a6751520cf2b71edb8c45abb9d9d8 Mon Sep 17 00:00:00 2001
From: Josh Poimboeuf <jpoimboe@redhat.com>
Date: Fri, 17 Jul 2020 13:29:48 -0500
Subject: [PATCH 0987/1341] Revert "kbuild: use -flive-patching when
 CONFIG_LIVEPATCH is enabled"

Use of the new -flive-patching flag was introduced with the following
commit:

  43bd3a95c98e ("kbuild: use -flive-patching when CONFIG_LIVEPATCH is enabled")

This flag has several drawbacks:

- It disables some optimizations, so it can have a negative effect on
  performance.

- According to the GCC documentation it's not compatible with LTO, which
  will become a compatibility issue as LTO support gets upstreamed in
  the kernel.

- It was intended to be used for source-based patch generation tooling,
  as opposed to binary-based patch generation tooling (e.g.,
  kpatch-build).  It probably should have at least been behind a
  separate config option so as not to negatively affect other livepatch
  users.

- Clang doesn't have the flag, so as far as I can tell, this method of
  generating patches is incompatible with Clang, which like LTO is
  becoming more mainstream.

- It breaks GCC's implicit noreturn detection for local functions.  This
  is the cause of several "unreachable instruction" objtool warnings.

- The broken noreturn detection is an obvious GCC regression, but we
  haven't yet gotten GCC developers to acknowledge that, which doesn't
  inspire confidence in their willingness to keep the feature working as
  optimizations are added or changed going forward.

- While there *is* a distro which relies on this flag for their distro
  livepatch module builds, there's not a publicly documented way to
  create safe livepatch modules with it.  Its use seems to be based on
  tribal knowledge.  It serves no benefit to those who don't know how to
  use it.

  (In fact, I believe the current livepatch documentation and samples
  are misleading and dangerous, and should be corrected.  Or at least
  amended with a disclaimer.  But I don't feel qualified to make such
  changes.)

Also, we have an idea for using objtool to detect function changes,
which could potentially obsolete the need for this flag anyway.

At this point the flag has no benefits for upstream which would
counteract the above drawbacks.  Revert it until it becomes more ready.

This reverts commit 43bd3a95c98e1a86b8b55d97f745c224ecff02b9.

Fixes: 43bd3a95c98e ("kbuild: use -flive-patching when CONFIG_LIVEPATCH is enabled")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/696262e997359666afa053fe7d1a9fb2bb373964.1595010490.git.jpoimboe@redhat.com
---
 Makefile | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/Makefile b/Makefile
index 5cfc3481207fc..f1763e4a312be 100644
--- a/Makefile
+++ b/Makefile
@@ -887,10 +887,6 @@ KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
 LDFLAGS_vmlinux += --gc-sections
 endif
 
-ifdef CONFIG_LIVEPATCH
-KBUILD_CFLAGS += $(call cc-option, -flive-patching=inline-clone)
-endif
-
 ifdef CONFIG_SHADOW_CALL_STACK
 CC_FLAGS_SCS	:= -fsanitize=shadow-call-stack
 KBUILD_CFLAGS	+= $(CC_FLAGS_SCS)
-- 
GitLab


From bb06748207cfb1502d11b90325eba7f8c44c9f02 Mon Sep 17 00:00:00 2001
From: Huang Pei <huangpei@loongson.cn>
Date: Tue, 1 Sep 2020 14:53:09 +0800
Subject: [PATCH 0988/1341] MIPS: add missing MSACSR and upper MSA
 initialization

In cc97ab235f3f ("MIPS: Simplify FP context initialization), init_fp_ctx
just initialize the fp/msa context, and own_fp_inatomic just restore
FCSR and 64bit FP regs from it, but miss MSACSR and upper MSA regs for
MSA, so MSACSR and MSA upper regs's value from previous task on current
cpu can leak into current task and cause unpredictable behavior when MSA
context not initialized.

Fixes: cc97ab235f3f ("MIPS: Simplify FP context initialization")
Signed-off-by: Huang Pei <huangpei@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/kernel/traps.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 38aa07ccdbcc2..cf788591f0911 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -1287,6 +1287,18 @@ static int enable_restore_fp_context(int msa)
 		err = own_fpu_inatomic(1);
 		if (msa && !err) {
 			enable_msa();
+			/*
+			 * with MSA enabled, userspace can see MSACSR
+			 * and MSA regs, but the values in them are from
+			 * other task before current task, restore them
+			 * from saved fp/msa context
+			 */
+			write_msa_csr(current->thread.fpu.msacsr);
+			/*
+			 * own_fpu_inatomic(1) just restore low 64bit,
+			 * fix the high 64bit
+			 */
+			init_msa_upper();
 			set_thread_flag(TIF_USEDMSA);
 			set_thread_flag(TIF_MSA_CTX_LIVE);
 		}
-- 
GitLab


From baf5cb30fbd1c22f6aa03c081794c2ee0f5be4da Mon Sep 17 00:00:00 2001
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: Wed, 2 Sep 2020 23:32:14 +0200
Subject: [PATCH 0989/1341] MIPS: SNI: Fix SCSI interrupt

On RM400(a20r) machines ISA and SCSI interrupts share the same interrupt
line. Commit 49e6e07e3c80 ("MIPS: pass non-NULL dev_id on shared
request_irq()") accidently dropped the IRQF_SHARED bit, which breaks
registering SCSI interrupt. Put back IRQF_SHARED and add dev_id for
ISA interrupt.

Fixes: 49e6e07e3c80 ("MIPS: pass non-NULL dev_id on shared request_irq()")
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/sni/a20r.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/mips/sni/a20r.c b/arch/mips/sni/a20r.c
index 0ecffb65fd6d1..b09dc844985a8 100644
--- a/arch/mips/sni/a20r.c
+++ b/arch/mips/sni/a20r.c
@@ -222,8 +222,8 @@ void __init sni_a20r_irq_init(void)
 		irq_set_chip_and_handler(i, &a20r_irq_type, handle_level_irq);
 	sni_hwint = a20r_hwint;
 	change_c0_status(ST0_IM, IE_IRQ0);
-	if (request_irq(SNI_A20R_IRQ_BASE + 3, sni_isa_irq_handler, 0, "ISA",
-			NULL))
+	if (request_irq(SNI_A20R_IRQ_BASE + 3, sni_isa_irq_handler,
+			IRQF_SHARED, "ISA", sni_isa_irq_handler))
 		pr_err("Failed to register ISA interrupt\n");
 }
 
-- 
GitLab


From 6a6660d049f88b89fd9a4b9db3581b245f7782fa Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 3 Sep 2020 10:33:00 +0200
Subject: [PATCH 0990/1341] ALSA: hda/realtek - Improved routing for Thinkpad
 X1 7th/8th Gen

There've been quite a few regression reports about the lowered volume
(reduced to ca 65% from the previous level) on Lenovo Thinkpad X1
after the commit d2cd795c4ece ("ALSA: hda - fixup for the bass speaker
on Lenovo Carbon X1 7th gen").  Although the commit itself does the
right thing from HD-audio POV in order to have a volume control for
bass speakers, it seems that the machine has some secret recipe under
the hood.

Through experiments, Benjamin Poirier found out that the following
routing gives the best result:
* DAC1 (NID 0x02) -> Speaker pin (NID 0x14)
* DAC2 (NID 0x03) -> Shared by both Bass Speaker pin (NID 0x17) &
                     Headphone pin (0x21)
* DAC3 (NID 0x06) -> Unused

DAC1 seems to have some equalizer internally applied, and you'd get
again the output in a bad quality if you connect this to the
headphone pin.  Hence the headphone is connected to DAC2, which is now
shared with the bass speaker pin.  DAC3 has no volume amp, hence it's
not connected at all.

For achieving the routing above, this patch introduced a couple of
workarounds:

* The connection list of bass speaker pin (NID 0x17) is reduced not to
  include DAC3 (NID 0x06)
* Pass preferred_pairs array to specify the fixed connection

Here, both workarounds are needed because the generic parser prefers
the individual DAC assignment over others.

When the routing above is applied, the generic parser creates the two
volume controls "Front" and "Bass Speaker".  Since we have only two
DACs for three output pins, those are not fully controlling each
output individually, and it would confuse PulseAudio.  For avoiding
the pitfall, in this patch, we rename those volume controls to some
unique ones ("DAC1" and "DAC2").  Then PulseAudio ignore them and
concentrate only on the still good-working "Master" volume control.
If a user still wants to control each DAC volume, they can still
change manually via "DAC1" and "DAC2" volume controls.

Fixes: d2cd795c4ece ("ALSA: hda - fixup for the bass speaker on Lenovo Carbon X1 7th gen")
Reported-by: Benjamin Poirier <benjamin.poirier@gmail.com>
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Tested-by: Benjamin Poirier <benjamin.poirier@gmail.com>
Cc: <stable@vger.kernel.org>
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207407#c10
BugLink: https://gist.github.com/hamidzr/dd81e429dc86f4327ded7a2030e7d7d9#gistcomment-3214171
BugLink: https://gist.github.com/hamidzr/dd81e429dc86f4327ded7a2030e7d7d9#gistcomment-3276276
Link: https://lore/kernel.org/r/20200829112746.3118-1-benjamin.poirier@gmail.com
Link: https://lore.kernel.org/r/20200903083300.6333-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_realtek.c | 42 ++++++++++++++++++++++++++++++++++-
 1 file changed, 41 insertions(+), 1 deletion(-)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index 2ef8b080d84b1..c521a1f170969 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -5868,6 +5868,39 @@ static void alc275_fixup_gpio4_off(struct hda_codec *codec,
 	}
 }
 
+/* Quirk for Thinkpad X1 7th and 8th Gen
+ * The following fixed routing needed
+ * DAC1 (NID 0x02) -> Speaker (NID 0x14); some eq applied secretly
+ * DAC2 (NID 0x03) -> Bass (NID 0x17) & Headphone (NID 0x21); sharing a DAC
+ * DAC3 (NID 0x06) -> Unused, due to the lack of volume amp
+ */
+static void alc285_fixup_thinkpad_x1_gen7(struct hda_codec *codec,
+					  const struct hda_fixup *fix, int action)
+{
+	static const hda_nid_t conn[] = { 0x02, 0x03 }; /* exclude 0x06 */
+	static const hda_nid_t preferred_pairs[] = {
+		0x14, 0x02, 0x17, 0x03, 0x21, 0x03, 0
+	};
+	struct alc_spec *spec = codec->spec;
+
+	switch (action) {
+	case HDA_FIXUP_ACT_PRE_PROBE:
+		snd_hda_override_conn_list(codec, 0x17, ARRAY_SIZE(conn), conn);
+		spec->gen.preferred_dacs = preferred_pairs;
+		break;
+	case HDA_FIXUP_ACT_BUILD:
+		/* The generic parser creates somewhat unintuitive volume ctls
+		 * with the fixed routing above, and the shared DAC2 may be
+		 * confusing for PA.
+		 * Rename those to unique names so that PA doesn't touch them
+		 * and use only Master volume.
+		 */
+		rename_ctl(codec, "Front Playback Volume", "DAC1 Playback Volume");
+		rename_ctl(codec, "Bass Speaker Playback Volume", "DAC2 Playback Volume");
+		break;
+	}
+}
+
 static void alc233_alc662_fixup_lenovo_dual_codecs(struct hda_codec *codec,
 					 const struct hda_fixup *fix,
 					 int action)
@@ -6136,6 +6169,7 @@ enum {
 	ALC289_FIXUP_DUAL_SPK,
 	ALC294_FIXUP_SPK2_TO_DAC1,
 	ALC294_FIXUP_ASUS_DUAL_SPK,
+	ALC285_FIXUP_THINKPAD_X1_GEN7,
 	ALC285_FIXUP_THINKPAD_HEADSET_JACK,
 	ALC294_FIXUP_ASUS_HPE,
 	ALC294_FIXUP_ASUS_COEF_1B,
@@ -7281,11 +7315,17 @@ static const struct hda_fixup alc269_fixups[] = {
 		.chained = true,
 		.chain_id = ALC294_FIXUP_SPK2_TO_DAC1
 	},
+	[ALC285_FIXUP_THINKPAD_X1_GEN7] = {
+		.type = HDA_FIXUP_FUNC,
+		.v.func = alc285_fixup_thinkpad_x1_gen7,
+		.chained = true,
+		.chain_id = ALC269_FIXUP_THINKPAD_ACPI
+	},
 	[ALC285_FIXUP_THINKPAD_HEADSET_JACK] = {
 		.type = HDA_FIXUP_FUNC,
 		.v.func = alc_fixup_headset_jack,
 		.chained = true,
-		.chain_id = ALC285_FIXUP_SPEAKER2_TO_DAC1
+		.chain_id = ALC285_FIXUP_THINKPAD_X1_GEN7
 	},
 	[ALC294_FIXUP_ASUS_HPE] = {
 		.type = HDA_FIXUP_VERBS,
-- 
GitLab


From 6d3ba803ce32ecee36eb462427dc82237b3a70c8 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Wed, 19 Aug 2020 19:51:33 +0200
Subject: [PATCH 0991/1341] dma-buf: Fix kerneldoc of dma_buf_set_name()

Fix W=1 compile warnings (invalid kerneldoc):

    drivers/dma-buf/dma-buf.c:328: warning: Function parameter or member 'dmabuf' not described in 'dma_buf_set_name'

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200819175134.19261-1-krzk@kernel.org
---
 drivers/dma-buf/dma-buf.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 1699a8e309ef0..58564d82a3a22 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -316,9 +316,9 @@ static __poll_t dma_buf_poll(struct file *file, poll_table *poll)
  * name of the dma-buf if the same piece of memory is used for multiple
  * purpose between different devices.
  *
- * @dmabuf [in]     dmabuf buffer that will be renamed.
- * @buf:   [in]     A piece of userspace memory that contains the name of
- *                  the dma-buf.
+ * @dmabuf: [in]     dmabuf buffer that will be renamed.
+ * @buf:    [in]     A piece of userspace memory that contains the name of
+ *                   the dma-buf.
  *
  * Returns 0 on success. If the dma-buf buffer is already attached to
  * devices, return -EBUSY.
-- 
GitLab


From 8d0441cf9b6c7bb2ddfa10739d1f5cb5dad4cd55 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Wed, 19 Aug 2020 19:51:34 +0200
Subject: [PATCH 0992/1341] dma-buf: fence-chain: Document missing
 dma_fence_chain_init() parameter in kerneldoc

Fix W=1 compile warnings (invalid kerneldoc):

    drivers/dma-buf/dma-fence-chain.c:233: warning: Function parameter or member 'seqno' not described in 'dma_fence_chain_init'

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sumit Semwal <sumit.semwal@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200819175134.19261-2-krzk@kernel.org
---
 drivers/dma-buf/dma-fence-chain.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/dma-buf/dma-fence-chain.c b/drivers/dma-buf/dma-fence-chain.c
index 3d123502ff12a..7d129e68ac701 100644
--- a/drivers/dma-buf/dma-fence-chain.c
+++ b/drivers/dma-buf/dma-fence-chain.c
@@ -222,6 +222,7 @@ EXPORT_SYMBOL(dma_fence_chain_ops);
  * @chain: the chain node to initialize
  * @prev: the previous fence
  * @fence: the current fence
+ * @seqno: the sequence number to use for the fence chain
  *
  * Initialize a new chain node and either start a new chain or add the node to
  * the existing chain of the previous fence.
-- 
GitLab


From d0c20d38af135b2b4b90aa59df7878ef0c8fbef4 Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <darrick.wong@oracle.com>
Date: Wed, 2 Sep 2020 10:47:02 -0700
Subject: [PATCH 0993/1341] xfs: fix xfs_bmap_validate_extent_raw when checking
 attr fork of rt files

The realtime flag only applies to the data fork, so don't use the
realtime block number checks on the attr fork of a realtime file.

Fixes: 30b0984d9117 ("xfs: refactor bmap record validation")
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
---
 fs/xfs/libxfs/xfs_bmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 9c40d59710357..1b0a01b06a05d 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -6226,7 +6226,7 @@ xfs_bmap_validate_extent(
 
 	isrt = XFS_IS_REALTIME_INODE(ip);
 	endfsb = irec->br_startblock + irec->br_blockcount - 1;
-	if (isrt) {
+	if (isrt && whichfork == XFS_DATA_FORK) {
 		if (!xfs_verify_rtbno(mp, irec->br_startblock))
 			return __this_address;
 		if (!xfs_verify_rtbno(mp, endfsb))
-- 
GitLab


From af0ae997a3a7ef7e9d0b1358a0983e088084f086 Mon Sep 17 00:00:00 2001
From: Paul Barker <pbarker@konsulko.com>
Date: Thu, 3 Sep 2020 09:49:25 +0100
Subject: [PATCH 0994/1341] doc: net: dsa: Fix typo in config code sample

In the "single port" example code for configuring a DSA switch without
tagging support from userspace the command to bring up the "lan2" link
was typo'd.

Signed-off-by: Paul Barker <pbarker@konsulko.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 Documentation/networking/dsa/configuration.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/networking/dsa/configuration.rst b/Documentation/networking/dsa/configuration.rst
index af029b3ca2abe..11bd5e6108c00 100644
--- a/Documentation/networking/dsa/configuration.rst
+++ b/Documentation/networking/dsa/configuration.rst
@@ -180,7 +180,7 @@ The configuration can only be set up via VLAN tagging and bridge setup.
 
   # bring up the slave interfaces
   ip link set lan1 up
-  ip link set lan1 up
+  ip link set lan2 up
   ip link set lan3 up
 
   # create bridge
-- 
GitLab


From 6180bb446ab624b9ab8bf201ed251ca87f07b413 Mon Sep 17 00:00:00 2001
From: Coly Li <colyli@suse.de>
Date: Fri, 4 Sep 2020 00:16:25 +0800
Subject: [PATCH 0995/1341] dax: fix detection of dax support for
 non-persistent memory block devices

When calling __generic_fsdax_supported(), a dax-unsupported device may
not have dax_dev as NULL, e.g. the dax related code block is not enabled
by Kconfig.

Therefore in __generic_fsdax_supported(), to check whether a device
supports DAX or not, the following order of operations should be
performed:
- If dax_dev pointer is NULL, it means the device driver explicitly
  announce it doesn't support DAX. Then it is OK to directly return
  false from __generic_fsdax_supported().
- If dax_dev pointer is NOT NULL, it might be because the driver doesn't
  support DAX and not explicitly initialize related data structure. Then
  bdev_dax_supported() should be called for further check.

If device driver desn't explicitly set its dax_dev pointer to NULL,
this is not a bug. Calling bdev_dax_supported() makes sure they can be
recognized as dax-unsupported eventually.

Fixes: c2affe920b0e ("dax: do not print error message for non-persistent memory block device")
Cc: Jan Kara <jack@suse.com>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Reviewed-and-tested-by: Adrian Huang <ahuang12@lenovo.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Link: https://lore.kernel.org/r/20200903161625.19524-1-colyli@suse.de
---
 drivers/dax/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 32642634c1bb6..e5767c83ea23d 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -100,7 +100,7 @@ bool __generic_fsdax_supported(struct dax_device *dax_dev,
 		return false;
 	}
 
-	if (!dax_dev && !bdev_dax_supported(bdev, blocksize)) {
+	if (!dax_dev || !bdev_dax_supported(bdev, blocksize)) {
 		pr_debug("%s: error: dax unsupported by block device\n",
 				bdevname(bdev, buf));
 		return false;
-- 
GitLab


From 0823f768b800cca2592fad3b5649766ae6bc4eba Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Thu, 3 Sep 2020 15:34:20 -0300
Subject: [PATCH 0996/1341] perf parse-events: Use uintptr_t when casting
 numbers to pointers

To address these errors found when cross building from x86_64 to MIPS
little endian 32-bit:

    CC       /tmp/build/perf/util/parse-events-bison.o
  util/parse-events.y: In function 'parse_events_parse':
  util/parse-events.y:514:6: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
    514 |      (void *) $2, $6, $4);
        |      ^
  util/parse-events.y:531:7: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
    531 |       (void *) $2, NULL, $4)) {
        |       ^
  util/parse-events.y:547:6: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
    547 |      (void *) $2, $4, 0);
        |      ^
  util/parse-events.y:564:7: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast]
    564 |       (void *) $2, NULL, 0)) {
        |       ^

Fixes: cabbf26821aa210f ("perf parse: Before yyabort-ing free components")
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Ian Rogers <irogers@google.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yonghong Song <yhs@fb.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/parse-events.y | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index b9fb91fdc5de9..645bf4f1859fd 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -511,7 +511,7 @@ PE_PREFIX_MEM PE_VALUE '/' PE_VALUE ':' PE_MODIFIER_BP sep_dc
 	list = alloc_list();
 	ABORT_ON(!list);
 	err = parse_events_add_breakpoint(list, &parse_state->idx,
-					(void *) $2, $6, $4);
+					(void *)(uintptr_t) $2, $6, $4);
 	free($6);
 	if (err) {
 		free(list);
@@ -528,7 +528,7 @@ PE_PREFIX_MEM PE_VALUE '/' PE_VALUE sep_dc
 	list = alloc_list();
 	ABORT_ON(!list);
 	if (parse_events_add_breakpoint(list, &parse_state->idx,
-						(void *) $2, NULL, $4)) {
+						(void *)(uintptr_t) $2, NULL, $4)) {
 		free(list);
 		YYABORT;
 	}
@@ -544,7 +544,7 @@ PE_PREFIX_MEM PE_VALUE ':' PE_MODIFIER_BP sep_dc
 	list = alloc_list();
 	ABORT_ON(!list);
 	err = parse_events_add_breakpoint(list, &parse_state->idx,
-					(void *) $2, $4, 0);
+					(void *)(uintptr_t) $2, $4, 0);
 	free($4);
 	if (err) {
 		free(list);
@@ -561,7 +561,7 @@ PE_PREFIX_MEM PE_VALUE sep_dc
 	list = alloc_list();
 	ABORT_ON(!list);
 	if (parse_events_add_breakpoint(list, &parse_state->idx,
-						(void *) $2, NULL, 0)) {
+						(void *)(uintptr_t) $2, NULL, 0)) {
 		free(list);
 		YYABORT;
 	}
-- 
GitLab


From e62458e3940eb3dfb009481850e140fbee183b04 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Fri, 4 Sep 2020 00:25:10 +0900
Subject: [PATCH 0997/1341] perf jevents: Fix suspicious code in fixregex()

The new string should have enough space for the original string and the
back slashes IMHO.

Fixes: fbc2844e84038ce3 ("perf vendor events: Use more flexible pattern matching for CPU identification for mapfile.csv")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: William Cohen <wcohen@redhat.com>
Link: http://lore.kernel.org/lkml/20200903152510.489233-1-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/pmu-events/jevents.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/pmu-events/jevents.c b/tools/perf/pmu-events/jevents.c
index fa86c5f997cc5..fc9c158bfa134 100644
--- a/tools/perf/pmu-events/jevents.c
+++ b/tools/perf/pmu-events/jevents.c
@@ -137,7 +137,7 @@ static char *fixregex(char *s)
 		return s;
 
 	/* allocate space for a new string */
-	fixed = (char *) malloc(len + 1);
+	fixed = (char *) malloc(len + esc_count + 1);
 	if (!fixed)
 		return NULL;
 
-- 
GitLab


From 10a6f5c3b3ec03c7427b055b1f6081e752762d2e Mon Sep 17 00:00:00 2001
From: "Tzvetomir Stoyanov (VMware)" <tz.stoyanov@gmail.com>
Date: Wed, 2 Sep 2020 13:31:21 +0300
Subject: [PATCH 0998/1341] libtraceevent: Fix build warning on 32-bit arches

Fixed a compilation warning for casting to pointer from integer of
different size on 32-bit platforms.

Reported-by: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: linux-trace-devel@vger.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/lib/traceevent/event-parse.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index 3ba566de821c6..5acc18b326061 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -5259,7 +5259,7 @@ static int print_arg_pointer(struct trace_seq *s, const char *format, int plen,
 	default:
 		ret = 0;
 		val = eval_num_arg(data, size, event, arg);
-		trace_seq_printf(s, "%p", (void *)val);
+		trace_seq_printf(s, "%p", (void *)(intptr_t)val);
 		break;
 	}
 
-- 
GitLab


From ee6a961432e75393bd69bf70ba70bad90396fa82 Mon Sep 17 00:00:00 2001
From: Jin Yao <yao.jin@linux.intel.com>
Date: Thu, 3 Sep 2020 09:01:13 +0800
Subject: [PATCH 0999/1341] perf stat: Turn off summary for interval mode by
 default

There's a risk that outputting interval mode summaries by default breaks
CSV consumers. It already broke pmu-tools/toplev.

So now we turn off the summary by default but we create a new option
'--summary' to enable the summary. This is active even when not using
CSV mode.

Before:

  root@kbl-ppc:~# perf stat -I1000 --interval-count 2
  #           time             counts unit events
       1.000265904           8,005.73 msec cpu-clock                 #    8.006 CPUs utilized
       1.000265904                601      context-switches          #    0.075 K/sec
       1.000265904                 10      cpu-migrations            #    0.001 K/sec
       1.000265904                  0      page-faults               #    0.000 K/sec
       1.000265904         66,746,521      cycles                    #    0.008 GHz
       1.000265904         71,874,398      instructions              #    1.08  insn per cycle
       1.000265904         13,356,781      branches                  #    1.668 M/sec
       1.000265904            298,756      branch-misses             #    2.24% of all branches
       2.001857667           8,012.52 msec cpu-clock                 #    8.013 CPUs utilized
       2.001857667                164      context-switches          #    0.020 K/sec
       2.001857667                 10      cpu-migrations            #    0.001 K/sec
       2.001857667                  2      page-faults               #    0.000 K/sec
       2.001857667          5,822,188      cycles                    #    0.001 GHz
       2.001857667          2,186,170      instructions              #    0.38  insn per cycle
       2.001857667            442,378      branches                  #    0.055 M/sec
       2.001857667             44,750      branch-misses             #   10.12% of all branches

   Performance counter stats for 'system wide':

           16,018.25 msec cpu-clock                 #    7.993 CPUs utilized
                 765      context-switches          #    0.048 K/sec
                  20      cpu-migrations            #    0.001 K/sec
                   2      page-faults               #    0.000 K/sec
          72,568,709      cycles                    #    0.005 GHz
          74,060,568      instructions              #    1.02  insn per cycle
          13,799,159      branches                  #    0.861 M/sec
             343,506      branch-misses             #    2.49% of all branches

         2.004118489 seconds time elapsed

After:

  root@kbl-ppc:~# perf stat -I1000 --interval-count 2
  #           time             counts unit events
       1.001336393           8,013.28 msec cpu-clock                 #    8.013 CPUs utilized
       1.001336393                 82      context-switches          #    0.010 K/sec
       1.001336393                  8      cpu-migrations            #    0.001 K/sec
       1.001336393                  0      page-faults               #    0.000 K/sec
       1.001336393          4,199,121      cycles                    #    0.001 GHz
       1.001336393          1,373,991      instructions              #    0.33  insn per cycle
       1.001336393            270,681      branches                  #    0.034 M/sec
       1.001336393             31,659      branch-misses             #   11.70% of all branches
       2.003905006           8,020.52 msec cpu-clock                 #    8.021 CPUs utilized
       2.003905006                184      context-switches          #    0.023 K/sec
       2.003905006                  8      cpu-migrations            #    0.001 K/sec
       2.003905006                  2      page-faults               #    0.000 K/sec
       2.003905006          5,446,190      cycles                    #    0.001 GHz
       2.003905006          2,312,547      instructions              #    0.42  insn per cycle
       2.003905006            451,691      branches                  #    0.056 M/sec
       2.003905006             37,925      branch-misses             #    8.40% of all branches

  root@kbl-ppc:~# perf stat -I1000 --interval-count 2 --summary
  #           time             counts unit events
       1.001313128           8,013.20 msec cpu-clock                 #    8.013 CPUs utilized
       1.001313128                 83      context-switches          #    0.010 K/sec
       1.001313128                  8      cpu-migrations            #    0.001 K/sec
       1.001313128                  0      page-faults               #    0.000 K/sec
       1.001313128          4,470,950      cycles                    #    0.001 GHz
       1.001313128          1,440,045      instructions              #    0.32  insn per cycle
       1.001313128            283,222      branches                  #    0.035 M/sec
       1.001313128             33,576      branch-misses             #   11.86% of all branches
       2.003857385           8,020.34 msec cpu-clock                 #    8.020 CPUs utilized
       2.003857385                154      context-switches          #    0.019 K/sec
       2.003857385                  8      cpu-migrations            #    0.001 K/sec
       2.003857385                  2      page-faults               #    0.000 K/sec
       2.003857385          4,515,676      cycles                    #    0.001 GHz
       2.003857385          2,180,449      instructions              #    0.48  insn per cycle
       2.003857385            435,254      branches                  #    0.054 M/sec
       2.003857385             31,179      branch-misses             #    7.16% of all branches

   Performance counter stats for 'system wide':

           16,033.53 msec cpu-clock                 #    7.992 CPUs utilized
                 237      context-switches          #    0.015 K/sec
                  16      cpu-migrations            #    0.001 K/sec
                   2      page-faults               #    0.000 K/sec
           8,986,626      cycles                    #    0.001 GHz
           3,620,494      instructions              #    0.40  insn per cycle
             718,476      branches                  #    0.045 M/sec
              64,755      branch-misses             #    9.01% of all branches

         2.006124542 seconds time elapsed

Fixes: c7e5b328a8d4 ("perf stat: Report summary for interval mode")
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200903010113.32232-1-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-stat.txt | 3 +++
 tools/perf/builtin-stat.c              | 8 +++++---
 tools/perf/util/stat.h                 | 1 +
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index c9bfefc051fbe..947672fd9c702 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -416,6 +416,9 @@ counts for all hardware threads in a core but show the sum counts per
 hardware thread. This is essentially a replacement for the any bit and
 convenient for post processing.
 
+--summary::
+Print summary for interval mode (-I).
+
 EXAMPLES
 --------
 
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 483a28ef4ec4f..fddc97cac9841 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -404,7 +404,7 @@ static void read_counters(struct timespec *rs)
 {
 	struct evsel *counter;
 
-	if (!stat_config.summary && (read_affinity_counters(rs) < 0))
+	if (!stat_config.stop_read_counter && (read_affinity_counters(rs) < 0))
 		return;
 
 	evlist__for_each_entry(evsel_list, counter) {
@@ -897,9 +897,9 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
 	if (stat_config.walltime_run_table)
 		stat_config.walltime_run[run_idx] = t1 - t0;
 
-	if (interval) {
+	if (interval && stat_config.summary) {
 		stat_config.interval = 0;
-		stat_config.summary = true;
+		stat_config.stop_read_counter = true;
 		init_stats(&walltime_nsecs_stats);
 		update_stats(&walltime_nsecs_stats, t1 - t0);
 
@@ -1164,6 +1164,8 @@ static struct option stat_options[] = {
 		    "Use with 'percore' event qualifier to show the event "
 		    "counts of one hardware thread by sum up total hardware "
 		    "threads of same physical core"),
+	OPT_BOOLEAN(0, "summary", &stat_config.summary,
+		       "print summary for interval mode"),
 #ifdef HAVE_LIBPFM
 	OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
 		"libpfm4 event selector. use 'perf list' to list available events",
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index f8778cffd9419..aa3bed48511b3 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -113,6 +113,7 @@ struct perf_stat_config {
 	bool			 summary;
 	bool			 metric_no_group;
 	bool			 metric_no_merge;
+	bool			 stop_read_counter;
 	FILE			*output;
 	unsigned int		 interval;
 	unsigned int		 timeout;
-- 
GitLab


From e4d71f79cf5c10fa8bc6f5d3bebea570c9c438f1 Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Wed, 2 Sep 2020 22:05:26 +0800
Subject: [PATCH 1000/1341] perf bench: The do_run_multi_threaded() function
 must use IS_ERR(perf_session__new())

In case of error, the function perf_session__new() returns ERR_PTR() and
never returns NULL. The NULL test in the return value check should be
replaced with IS_ERR()

Committer notes:

This wasn't compiling due to an extraneous '{' not matched by a '}', fix
it.

Fixes: 13edc237200c ("perf bench: Add a multi-threaded synthesize benchmark")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200902140526.26916-1-yuehaibing@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/bench/synthesize.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/bench/synthesize.c b/tools/perf/bench/synthesize.c
index 8d624aea1c5e5..b2924e3181dc3 100644
--- a/tools/perf/bench/synthesize.c
+++ b/tools/perf/bench/synthesize.c
@@ -162,8 +162,8 @@ static int do_run_multi_threaded(struct target *target,
 	init_stats(&event_stats);
 	for (i = 0; i < multi_iterations; i++) {
 		session = perf_session__new(NULL, false, NULL);
-		if (!session)
-			return -ENOMEM;
+		if (IS_ERR(session))
+			return PTR_ERR(session);
 
 		atomic_set(&event_count, 0);
 		gettimeofday(&start, NULL);
-- 
GitLab


From e48a73a312ebf19cc3d72aa74985db25c30757c1 Mon Sep 17 00:00:00 2001
From: Kim Phillips <kim.phillips@amd.com>
Date: Tue, 1 Sep 2020 16:58:53 -0500
Subject: [PATCH 1001/1341] perf record/stat: Explicitly call out event
 modifiers in the documentation

Event modifiers are not mentioned in the perf record or perf stat
manpages.  Add them to orient new users more effectively by pointing
them to the perf list manpage for details.

Fixes: 2055fdaf8703 ("perf list: Document precise event sampling for AMD IBS")
Signed-off-by: Kim Phillips <kim.phillips@amd.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Clarke <pc@us.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tony Jones <tonyj@suse.de>
Cc: stable@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200901215853.276234-1-kim.phillips@amd.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-record.txt | 4 ++++
 tools/perf/Documentation/perf-stat.txt   | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 3f72d8e261f3d..bd50cdff08a88 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -33,6 +33,10 @@ OPTIONS
         - a raw PMU event (eventsel+umask) in the form of rNNN where NNN is a
 	  hexadecimal event descriptor.
 
+        - a symbolic or raw PMU event followed by an optional colon
+	  and a list of event modifiers, e.g., cpu-cycles:p.  See the
+	  linkperf:perf-list[1] man page for details on event modifiers.
+
 	- a symbolically formed PMU event like 'pmu/param1=0x3,param2/' where
 	  'param1', 'param2', etc are defined as formats for the PMU in
 	  /sys/bus/event_source/devices/<pmu>/format/*.
diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index 947672fd9c702..db420dd75e435 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -39,6 +39,10 @@ report::
 	- a raw PMU event (eventsel+umask) in the form of rNNN where NNN is a
 	  hexadecimal event descriptor.
 
+        - a symbolic or raw PMU event followed by an optional colon
+	  and a list of event modifiers, e.g., cpu-cycles:p.  See the
+	  linkperf:perf-list[1] man page for details on event modifiers.
+
 	- a symbolically formed event like 'pmu/param1=0x3,param2/' where
 	  param1 and param2 are defined as formats for the PMU in
 	  /sys/bus/event_source/devices/<pmu>/format/*
-- 
GitLab


From 830fadfd954c6782b7a8a2461c76a568c7153b9a Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Wed, 26 Aug 2020 23:30:17 +0200
Subject: [PATCH 1002/1341] perf tools: Add bpf image check to
 __map__is_kmodule

When validating kcore modules the do_validate_kcore_modules function
checks on every kernel module dso against modules record. The
__map__is_kmodule check is used to get only kernel module dso objects
through.

Currently the bpf images are slipping through the check and making the
validation to fail, so report falls back from kcore usage to kallsyms.

Adding __map__is_bpf_image check for bpf image and adding it to
__map__is_kmodule check.

Fixes: 3c29d4483e85 ("perf annotate: Add basic support for bpf_image")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200826213017.818788-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/machine.c |  6 ------
 tools/perf/util/map.c     | 16 ++++++++++++++++
 tools/perf/util/map.h     |  9 ++++++++-
 3 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 208b813e00ea4..85587de027a51 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -736,12 +736,6 @@ int machine__process_switch_event(struct machine *machine __maybe_unused,
 	return 0;
 }
 
-static int is_bpf_image(const char *name)
-{
-	return strncmp(name, "bpf_trampoline_", sizeof("bpf_trampoline_") - 1) == 0 ||
-	       strncmp(name, "bpf_dispatcher_", sizeof("bpf_dispatcher_") - 1) == 0;
-}
-
 static int machine__process_ksymbol_register(struct machine *machine,
 					     union perf_event *event,
 					     struct perf_sample *sample __maybe_unused)
diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 1d7210804639f..cc0faf8f13219 100644
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -267,6 +267,22 @@ bool __map__is_bpf_prog(const struct map *map)
 	return name && (strstr(name, "bpf_prog_") == name);
 }
 
+bool __map__is_bpf_image(const struct map *map)
+{
+	const char *name;
+
+	if (map->dso->binary_type == DSO_BINARY_TYPE__BPF_IMAGE)
+		return true;
+
+	/*
+	 * If PERF_RECORD_KSYMBOL is not included, the dso will not have
+	 * type of DSO_BINARY_TYPE__BPF_IMAGE. In such cases, we can
+	 * guess the type based on name.
+	 */
+	name = map->dso->short_name;
+	return name && is_bpf_image(name);
+}
+
 bool __map__is_ool(const struct map *map)
 {
 	return map->dso && map->dso->binary_type == DSO_BINARY_TYPE__OOL;
diff --git a/tools/perf/util/map.h b/tools/perf/util/map.h
index 9e312ae2d6563..c2f5d28fe73ac 100644
--- a/tools/perf/util/map.h
+++ b/tools/perf/util/map.h
@@ -147,12 +147,14 @@ int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name,
 bool __map__is_kernel(const struct map *map);
 bool __map__is_extra_kernel_map(const struct map *map);
 bool __map__is_bpf_prog(const struct map *map);
+bool __map__is_bpf_image(const struct map *map);
 bool __map__is_ool(const struct map *map);
 
 static inline bool __map__is_kmodule(const struct map *map)
 {
 	return !__map__is_kernel(map) && !__map__is_extra_kernel_map(map) &&
-	       !__map__is_bpf_prog(map) && !__map__is_ool(map);
+	       !__map__is_bpf_prog(map) && !__map__is_ool(map) &&
+	       !__map__is_bpf_image(map);
 }
 
 bool map__has_symbols(const struct map *map);
@@ -164,4 +166,9 @@ static inline bool is_entry_trampoline(const char *name)
 	return !strcmp(name, ENTRY_TRAMPOLINE_NAME);
 }
 
+static inline bool is_bpf_image(const char *name)
+{
+	return strncmp(name, "bpf_trampoline_", sizeof("bpf_trampoline_") - 1) == 0 ||
+	       strncmp(name, "bpf_dispatcher_", sizeof("bpf_dispatcher_") - 1) == 0;
+}
 #endif /* __PERF_MAP_H */
-- 
GitLab


From f71800228dc74711c3df43854ce7089562a3bc2d Mon Sep 17 00:00:00 2001
From: Linus Walleij <linus.walleij@linaro.org>
Date: Thu, 20 Aug 2020 22:31:44 +0200
Subject: [PATCH 1003/1341] drm/tve200: Stabilize enable/disable

The TVE200 will occasionally print a bunch of lost interrupts
and similar dmesg messages, sometimes during boot and sometimes
after disabling and coming back to enablement. This is probably
because the hardware is left in an unknown state by the boot
loader that displays a logo.

This can be fixed by bringing the controller into a known state
by resetting the controller while enabling it. We retry reset 5
times like the vendor driver does. We also put the controller
into reset before de-clocking it and clear all interrupts before
enabling the vblank IRQ.

This makes the video enable/disable/enable cycle rock solid
on the D-Link DIR-685. Tested extensively.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: stable@vger.kernel.org
Link: https://patchwork.freedesktop.org/patch/msgid/20200820203144.271081-1-linus.walleij@linaro.org
---
 drivers/gpu/drm/tve200/tve200_display.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/tve200/tve200_display.c b/drivers/gpu/drm/tve200/tve200_display.c
index d733bbc4ac0e5..17ff24d999d18 100644
--- a/drivers/gpu/drm/tve200/tve200_display.c
+++ b/drivers/gpu/drm/tve200/tve200_display.c
@@ -14,6 +14,7 @@
 #include <linux/version.h>
 #include <linux/dma-buf.h>
 #include <linux/of_graph.h>
+#include <linux/delay.h>
 
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_fourcc.h>
@@ -130,9 +131,25 @@ static void tve200_display_enable(struct drm_simple_display_pipe *pipe,
 	struct drm_connector *connector = priv->connector;
 	u32 format = fb->format->format;
 	u32 ctrl1 = 0;
+	int retries;
 
 	clk_prepare_enable(priv->clk);
 
+	/* Reset the TVE200 and wait for it to come back online */
+	writel(TVE200_CTRL_4_RESET, priv->regs + TVE200_CTRL_4);
+	for (retries = 0; retries < 5; retries++) {
+		usleep_range(30000, 50000);
+		if (readl(priv->regs + TVE200_CTRL_4) & TVE200_CTRL_4_RESET)
+			continue;
+		else
+			break;
+	}
+	if (retries == 5 &&
+	    readl(priv->regs + TVE200_CTRL_4) & TVE200_CTRL_4_RESET) {
+		dev_err(drm->dev, "can't get hardware out of reset\n");
+		return;
+	}
+
 	/* Function 1 */
 	ctrl1 |= TVE200_CTRL_CSMODE;
 	/* Interlace mode for CCIR656: parameterize? */
@@ -230,8 +247,9 @@ static void tve200_display_disable(struct drm_simple_display_pipe *pipe)
 
 	drm_crtc_vblank_off(crtc);
 
-	/* Disable and Power Down */
+	/* Disable put into reset and Power Down */
 	writel(0, priv->regs + TVE200_CTRL);
+	writel(TVE200_CTRL_4_RESET, priv->regs + TVE200_CTRL_4);
 
 	clk_disable_unprepare(priv->clk);
 }
@@ -279,6 +297,8 @@ static int tve200_display_enable_vblank(struct drm_simple_display_pipe *pipe)
 	struct drm_device *drm = crtc->dev;
 	struct tve200_drm_dev_private *priv = drm->dev_private;
 
+	/* Clear any IRQs and enable */
+	writel(0xFF, priv->regs + TVE200_INT_CLR);
 	writel(TVE200_INT_V_STATUS, priv->regs + TVE200_INT_EN);
 	return 0;
 }
-- 
GitLab


From 556699341efa98243e08e34401b3f601da91f5a3 Mon Sep 17 00:00:00 2001
From: Michael Chan <michael.chan@broadcom.com>
Date: Thu, 3 Sep 2020 14:28:54 -0400
Subject: [PATCH 1004/1341] tg3: Fix soft lockup when tg3_reset_task() fails.

If tg3_reset_task() fails, the device state is left in an inconsistent
state with IFF_RUNNING still set but NAPI state not enabled.  A
subsequent operation, such as ifdown or AER error can cause it to
soft lock up when it tries to disable NAPI state.

Fix it by bringing down the device to !IFF_RUNNING state when
tg3_reset_task() fails.  tg3_reset_task() running from workqueue
will now call tg3_close() when the reset fails.  We need to
modify tg3_reset_task_cancel() slightly to avoid tg3_close()
calling cancel_work_sync() to cancel tg3_reset_task().  Otherwise
cancel_work_sync() will wait forever for tg3_reset_task() to
finish.

Reported-by: David Christensen <drc@linux.vnet.ibm.com>
Reported-by: Baptiste Covolato <baptiste@arista.com>
Fixes: db2199737990 ("tg3: Schedule at most one tg3_reset_task run")
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/broadcom/tg3.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index ebff1fc0d8cef..4515804d1ce4c 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -7221,8 +7221,8 @@ static inline void tg3_reset_task_schedule(struct tg3 *tp)
 
 static inline void tg3_reset_task_cancel(struct tg3 *tp)
 {
-	cancel_work_sync(&tp->reset_task);
-	tg3_flag_clear(tp, RESET_TASK_PENDING);
+	if (test_and_clear_bit(TG3_FLAG_RESET_TASK_PENDING, tp->tg3_flags))
+		cancel_work_sync(&tp->reset_task);
 	tg3_flag_clear(tp, TX_RECOVERY_PENDING);
 }
 
@@ -11209,18 +11209,27 @@ static void tg3_reset_task(struct work_struct *work)
 
 	tg3_halt(tp, RESET_KIND_SHUTDOWN, 0);
 	err = tg3_init_hw(tp, true);
-	if (err)
+	if (err) {
+		tg3_full_unlock(tp);
+		tp->irq_sync = 0;
+		tg3_napi_enable(tp);
+		/* Clear this flag so that tg3_reset_task_cancel() will not
+		 * call cancel_work_sync() and wait forever.
+		 */
+		tg3_flag_clear(tp, RESET_TASK_PENDING);
+		dev_close(tp->dev);
 		goto out;
+	}
 
 	tg3_netif_start(tp);
 
-out:
 	tg3_full_unlock(tp);
 
 	if (!err)
 		tg3_phy_start(tp);
 
 	tg3_flag_clear(tp, RESET_TASK_PENDING);
+out:
 	rtnl_unlock();
 }
 
-- 
GitLab


From 91e045b93db79a2ef66e045ad0d1f8f9d348e1f4 Mon Sep 17 00:00:00 2001
From: Mike Tipton <mdtipton@codeaurora.org>
Date: Thu, 3 Sep 2020 12:21:44 -0700
Subject: [PATCH 1005/1341] interconnect: qcom: Fix small BW votes being
 truncated to zero

Small BW votes that translate to less than a single BCM unit are
currently truncated to zero. Ensure that non-zero BW requests always
result in at least a vote of 1 to BCM.

Fixes: 976daac4a1c5 ("interconnect: qcom: Consolidate interconnect RPMh support")
Signed-off-by: Mike Tipton <mdtipton@codeaurora.org>
Link: https://lore.kernel.org/r/20200903192149.30385-2-mdtipton@codeaurora.org
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
---
 drivers/interconnect/qcom/bcm-voter.c | 27 +++++++++++++++++++--------
 1 file changed, 19 insertions(+), 8 deletions(-)

diff --git a/drivers/interconnect/qcom/bcm-voter.c b/drivers/interconnect/qcom/bcm-voter.c
index a3d2ef1d99037..609db9c95fd7a 100644
--- a/drivers/interconnect/qcom/bcm-voter.c
+++ b/drivers/interconnect/qcom/bcm-voter.c
@@ -52,8 +52,20 @@ static int cmp_vcd(void *priv, struct list_head *a, struct list_head *b)
 		return 1;
 }
 
+static u64 bcm_div(u64 num, u32 base)
+{
+	/* Ensure that small votes aren't lost. */
+	if (num && num < base)
+		return 1;
+
+	do_div(num, base);
+
+	return num;
+}
+
 static void bcm_aggregate(struct qcom_icc_bcm *bcm)
 {
+	struct qcom_icc_node *node;
 	size_t i, bucket;
 	u64 agg_avg[QCOM_ICC_NUM_BUCKETS] = {0};
 	u64 agg_peak[QCOM_ICC_NUM_BUCKETS] = {0};
@@ -61,22 +73,21 @@ static void bcm_aggregate(struct qcom_icc_bcm *bcm)
 
 	for (bucket = 0; bucket < QCOM_ICC_NUM_BUCKETS; bucket++) {
 		for (i = 0; i < bcm->num_nodes; i++) {
-			temp = bcm->nodes[i]->sum_avg[bucket] * bcm->aux_data.width;
-			do_div(temp, bcm->nodes[i]->buswidth * bcm->nodes[i]->channels);
+			node = bcm->nodes[i];
+			temp = bcm_div(node->sum_avg[bucket] * bcm->aux_data.width,
+				       node->buswidth * node->channels);
 			agg_avg[bucket] = max(agg_avg[bucket], temp);
 
-			temp = bcm->nodes[i]->max_peak[bucket] * bcm->aux_data.width;
-			do_div(temp, bcm->nodes[i]->buswidth);
+			temp = bcm_div(node->max_peak[bucket] * bcm->aux_data.width,
+				       node->buswidth);
 			agg_peak[bucket] = max(agg_peak[bucket], temp);
 		}
 
 		temp = agg_avg[bucket] * 1000ULL;
-		do_div(temp, bcm->aux_data.unit);
-		bcm->vote_x[bucket] = temp;
+		bcm->vote_x[bucket] = bcm_div(temp, bcm->aux_data.unit);
 
 		temp = agg_peak[bucket] * 1000ULL;
-		do_div(temp, bcm->aux_data.unit);
-		bcm->vote_y[bucket] = temp;
+		bcm->vote_y[bucket] = bcm_div(temp, bcm->aux_data.unit);
 	}
 
 	if (bcm->keepalive && bcm->vote_x[QCOM_ICC_BUCKET_AMC] == 0 &&
-- 
GitLab


From fffe83c8c40a61978f8998a85cc94bb2ca19b6dd Mon Sep 17 00:00:00 2001
From: Karsten Graul <kgraul@linux.ibm.com>
Date: Thu, 3 Sep 2020 21:53:15 +0200
Subject: [PATCH 1006/1341] net/smc: fix toleration of fake add_link messages

Older SMCR implementations had no link failover support and used one
link only. Because the handshake protocol requires to try the
establishment of a second link the old code sent a fake add_link message
and declined any server response afterwards.
The current code supports multiple links and inspects the received fake
add_link message more closely. To tolerate the fake add_link messages
smc_llc_is_local_add_link() needs an improved check of the message to
be able to separate between locally enqueued and fake add_link messages.
And smc_llc_cli_add_link() needs to check if the provided qp_mtu size is
invalid and reject the add_link request in that case.

Fixes: c48254fa48e5 ("net/smc: move add link processing for new device into llc layer")
Reviewed-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/smc/smc_llc.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c
index df5b0a6ea8488..3ea33466ebe98 100644
--- a/net/smc/smc_llc.c
+++ b/net/smc/smc_llc.c
@@ -841,6 +841,9 @@ int smc_llc_cli_add_link(struct smc_link *link, struct smc_llc_qentry *qentry)
 	struct smc_init_info ini;
 	int lnk_idx, rc = 0;
 
+	if (!llc->qp_mtu)
+		goto out_reject;
+
 	ini.vlan_id = lgr->vlan_id;
 	smc_pnet_find_alt_roce(lgr, &ini, link->smcibdev);
 	if (!memcmp(llc->sender_gid, link->peer_gid, SMC_GID_SIZE) &&
@@ -917,10 +920,20 @@ static void smc_llc_cli_add_link_invite(struct smc_link *link,
 	kfree(qentry);
 }
 
+static bool smc_llc_is_empty_llc_message(union smc_llc_msg *llc)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(llc->raw.data); i++)
+		if (llc->raw.data[i])
+			return false;
+	return true;
+}
+
 static bool smc_llc_is_local_add_link(union smc_llc_msg *llc)
 {
 	if (llc->raw.hdr.common.type == SMC_LLC_ADD_LINK &&
-	    !llc->add_link.qp_mtu && !llc->add_link.link_num)
+	    smc_llc_is_empty_llc_message(llc))
 		return true;
 	return false;
 }
-- 
GitLab


From 2d2bfeb8c5c8c95a93c473ca2c7d07cad6943a34 Mon Sep 17 00:00:00 2001
From: Ursula Braun <ubraun@linux.ibm.com>
Date: Thu, 3 Sep 2020 21:53:16 +0200
Subject: [PATCH 1007/1341] net/smc: set rx_off for SMCR explicitly

SMC tries to make use of SMCD first. If a problem shows up,
it tries to switch to SMCR. If the SMCD initializing problem shows
up after the SMCD connection has already been initialized, field
rx_off keeps the wrong SMCD value for SMCR, which results in corrupted
data at the receiver.
This patch adds an explicit (re-)setting of field rx_off to zero if the
connection uses SMCR.

Fixes: be244f28d22f ("net/smc: add SMC-D support in data transfer")
Reviewed-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/smc/smc_core.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index b42fa3b00d00a..a6ac0eb20c99e 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -1356,6 +1356,8 @@ int smc_conn_create(struct smc_sock *smc, struct smc_init_info *ini)
 	if (ini->is_smcd) {
 		conn->rx_off = sizeof(struct smcd_cdc_msg);
 		smcd_cdc_rx_init(conn); /* init tasklet for this conn */
+	} else {
+		conn->rx_off = 0;
 	}
 #ifndef KERNEL_HAS_ATOMIC64
 	spin_lock_init(&conn->acurs_lock);
-- 
GitLab


From 1d8df41d896d75c6eababaa912e3a814585d9f61 Mon Sep 17 00:00:00 2001
From: Ursula Braun <ubraun@linux.ibm.com>
Date: Thu, 3 Sep 2020 21:53:17 +0200
Subject: [PATCH 1008/1341] net/smc: reset sndbuf_desc if freed

When an SMC connection is created, and there is a problem to
create an RMB or DMB, the previously created send buffer is
thrown away as well including buffer descriptor freeing.
Make sure the connection no longer references the freed
buffer descriptor, otherwise bugs like this are possible:

[71556.835148] =============================================================================
[71556.835168] BUG kmalloc-128 (Tainted: G    B      OE    ): Poison overwritten
[71556.835172] -----------------------------------------------------------------------------

[71556.835179] INFO: 0x00000000d20894be-0x00000000aaef63e9 @offset=2724. First byte 0x0 instead of 0x6b
[71556.835215] INFO: Allocated in __smc_buf_create+0x184/0x578 [smc] age=0 cpu=5 pid=46726
[71556.835234]     ___slab_alloc+0x5a4/0x690
[71556.835239]     __slab_alloc.constprop.0+0x70/0xb0
[71556.835243]     kmem_cache_alloc_trace+0x38e/0x3f8
[71556.835250]     __smc_buf_create+0x184/0x578 [smc]
[71556.835257]     smc_buf_create+0x2e/0xe8 [smc]
[71556.835264]     smc_listen_work+0x516/0x6a0 [smc]
[71556.835275]     process_one_work+0x280/0x478
[71556.835280]     worker_thread+0x66/0x368
[71556.835287]     kthread+0x17a/0x1a0
[71556.835294]     ret_from_fork+0x28/0x2c
[71556.835301] INFO: Freed in smc_buf_create+0xd8/0xe8 [smc] age=0 cpu=5 pid=46726
[71556.835307]     __slab_free+0x246/0x560
[71556.835311]     kfree+0x398/0x3f8
[71556.835318]     smc_buf_create+0xd8/0xe8 [smc]
[71556.835324]     smc_listen_work+0x516/0x6a0 [smc]
[71556.835328]     process_one_work+0x280/0x478
[71556.835332]     worker_thread+0x66/0x368
[71556.835337]     kthread+0x17a/0x1a0
[71556.835344]     ret_from_fork+0x28/0x2c
[71556.835348] INFO: Slab 0x00000000a0744551 objects=51 used=51 fp=0x0000000000000000 flags=0x1ffff00000010200
[71556.835352] INFO: Object 0x00000000563480a1 @offset=2688 fp=0x00000000289567b2

[71556.835359] Redzone 000000006783cde2: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
[71556.835363] Redzone 00000000e35b876e: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
[71556.835367] Redzone 0000000023074562: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
[71556.835372] Redzone 00000000b9564b8c: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
[71556.835376] Redzone 00000000810c6362: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
[71556.835380] Redzone 0000000065ef52c3: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
[71556.835384] Redzone 00000000c5dd6984: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
[71556.835388] Redzone 000000004c480f8f: bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb  ................
[71556.835392] Object 00000000563480a1: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
[71556.835397] Object 000000009c479d06: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
[71556.835401] Object 000000006e1dce92: 6b 6b 6b 6b 00 00 00 00 6b 6b 6b 6b 6b 6b 6b 6b  kkkk....kkkkkkkk
[71556.835405] Object 00000000227f7cf8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
[71556.835410] Object 000000009a701215: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
[71556.835414] Object 000000003731ce76: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
[71556.835418] Object 00000000f7085967: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
[71556.835422] Object 0000000007f99927: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5  kkkkkkkkkkkkkkk.
[71556.835427] Redzone 00000000579c4913: bb bb bb bb bb bb bb bb                          ........
[71556.835431] Padding 00000000305aef82: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
[71556.835435] Padding 00000000b1cdd722: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
[71556.835438] Padding 00000000c7568199: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
[71556.835442] Padding 00000000fad4c4d4: 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a 5a  ZZZZZZZZZZZZZZZZ
[71556.835451] CPU: 0 PID: 47939 Comm: kworker/0:15 Tainted: G    B      OE     5.9.0-rc1uschi+ #54
[71556.835456] Hardware name: IBM 3906 M03 703 (LPAR)
[71556.835464] Workqueue: events smc_listen_work [smc]
[71556.835470] Call Trace:
[71556.835478]  [<00000000d5eaeb10>] show_stack+0x90/0xf8
[71556.835493]  [<00000000d66fc0f8>] dump_stack+0xa8/0xe8
[71556.835499]  [<00000000d61a511c>] check_bytes_and_report+0x104/0x130
[71556.835504]  [<00000000d61a57b2>] check_object+0x26a/0x2e0
[71556.835509]  [<00000000d61a59bc>] alloc_debug_processing+0x194/0x238
[71556.835514]  [<00000000d61a8c14>] ___slab_alloc+0x5a4/0x690
[71556.835519]  [<00000000d61a9170>] __slab_alloc.constprop.0+0x70/0xb0
[71556.835524]  [<00000000d61aaf66>] kmem_cache_alloc_trace+0x38e/0x3f8
[71556.835530]  [<000003ff80549bbc>] __smc_buf_create+0x184/0x578 [smc]
[71556.835538]  [<000003ff8054a396>] smc_buf_create+0x2e/0xe8 [smc]
[71556.835545]  [<000003ff80540c16>] smc_listen_work+0x516/0x6a0 [smc]
[71556.835549]  [<00000000d5f0f448>] process_one_work+0x280/0x478
[71556.835554]  [<00000000d5f0f6a6>] worker_thread+0x66/0x368
[71556.835559]  [<00000000d5f18692>] kthread+0x17a/0x1a0
[71556.835563]  [<00000000d6abf3b8>] ret_from_fork+0x28/0x2c
[71556.835569] INFO: lockdep is turned off.
[71556.835573] FIX kmalloc-128: Restoring 0x00000000d20894be-0x00000000aaef63e9=0x6b

[71556.835577] FIX kmalloc-128: Marking all objects used

Fixes: fd7f3a746582 ("net/smc: remove freed buffer from list")
Reviewed-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/smc/smc_core.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/smc/smc_core.c b/net/smc/smc_core.c
index a6ac0eb20c99e..a406627b1d552 100644
--- a/net/smc/smc_core.c
+++ b/net/smc/smc_core.c
@@ -1779,6 +1779,7 @@ int smc_buf_create(struct smc_sock *smc, bool is_smcd)
 		list_del(&smc->conn.sndbuf_desc->list);
 		mutex_unlock(&smc->conn.lgr->sndbufs_lock);
 		smc_buf_free(smc->conn.lgr, false, smc->conn.sndbuf_desc);
+		smc->conn.sndbuf_desc = NULL;
 	}
 	return rc;
 }
-- 
GitLab


From 5fb8642a17aa2ab9077372977d67a72d3899a98d Mon Sep 17 00:00:00 2001
From: Ursula Braun <ubraun@linux.ibm.com>
Date: Thu, 3 Sep 2020 21:53:18 +0200
Subject: [PATCH 1009/1341] net/smc: fix sock refcounting in case of
 termination

When an ISM device is removed, all its linkgroups are terminated,
i.e. all the corresponding connections are killed.
Connection killing invokes smc_close_active_abort(), which decreases
the sock refcount for certain states to simulate passive closing.
And it cancels the close worker and has to give up the sock lock for
this timeframe. This opens the door for a passive close worker or a
socket close to run in between. In this case smc_close_active_abort() and
passive close worker resp. smc_release() might do a sock_put for passive
closing. This causes:

[ 1323.315943] refcount_t: underflow; use-after-free.
[ 1323.316055] WARNING: CPU: 3 PID: 54469 at lib/refcount.c:28 refcount_warn_saturate+0xe8/0x130
[ 1323.316069] Kernel panic - not syncing: panic_on_warn set ...
[ 1323.316084] CPU: 3 PID: 54469 Comm: uperf Not tainted 5.9.0-20200826.rc2.git0.46328853ed20.300.fc32.s390x+debug #1
[ 1323.316096] Hardware name: IBM 2964 NC9 702 (z/VM 6.4.0)
[ 1323.316108] Call Trace:
[ 1323.316125]  [<00000000c0d4aae8>] show_stack+0x90/0xf8
[ 1323.316143]  [<00000000c15989b0>] dump_stack+0xa8/0xe8
[ 1323.316158]  [<00000000c0d8344e>] panic+0x11e/0x288
[ 1323.316173]  [<00000000c0d83144>] __warn+0xac/0x158
[ 1323.316187]  [<00000000c1597a7a>] report_bug+0xb2/0x130
[ 1323.316201]  [<00000000c0d36424>] monitor_event_exception+0x44/0xc0
[ 1323.316219]  [<00000000c195c716>] pgm_check_handler+0x1da/0x238
[ 1323.316234]  [<00000000c151844c>] refcount_warn_saturate+0xec/0x130
[ 1323.316280] ([<00000000c1518448>] refcount_warn_saturate+0xe8/0x130)
[ 1323.316310]  [<000003ff801f2e2a>] smc_release+0x192/0x1c8 [smc]
[ 1323.316323]  [<00000000c169f1fa>] __sock_release+0x5a/0xe0
[ 1323.316334]  [<00000000c169f2ac>] sock_close+0x2c/0x40
[ 1323.316350]  [<00000000c1086de0>] __fput+0xb8/0x278
[ 1323.316362]  [<00000000c0db1e0e>] task_work_run+0x76/0xb8
[ 1323.316393]  [<00000000c0d8ab84>] do_exit+0x26c/0x520
[ 1323.316408]  [<00000000c0d8af08>] do_group_exit+0x48/0xc0
[ 1323.316421]  [<00000000c0d8afa8>] __s390x_sys_exit_group+0x28/0x38
[ 1323.316433]  [<00000000c195c32c>] system_call+0xe0/0x2b4
[ 1323.316446] 1 lock held by uperf/54469:
[ 1323.316456]  #0: 0000000044125e60 (&sb->s_type->i_mutex_key#9){+.+.}-{3:3}, at: __sock_release+0x44/0xe0

The patch rechecks sock state in smc_close_active_abort() after
smc_close_cancel_work() to avoid duplicate decrease of sock
refcount for the same purpose.

Fixes: 611b63a12732 ("net/smc: cancel tx worker in case of socket aborts")
Reviewed-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/smc/smc_close.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/net/smc/smc_close.c b/net/smc/smc_close.c
index 290270c821ca4..35e30d39510da 100644
--- a/net/smc/smc_close.c
+++ b/net/smc/smc_close.c
@@ -116,7 +116,6 @@ static void smc_close_cancel_work(struct smc_sock *smc)
 	cancel_work_sync(&smc->conn.close_work);
 	cancel_delayed_work_sync(&smc->conn.tx_work);
 	lock_sock(sk);
-	sk->sk_state = SMC_CLOSED;
 }
 
 /* terminate smc socket abnormally - active abort
@@ -134,22 +133,22 @@ void smc_close_active_abort(struct smc_sock *smc)
 	}
 	switch (sk->sk_state) {
 	case SMC_ACTIVE:
-		sk->sk_state = SMC_PEERABORTWAIT;
-		smc_close_cancel_work(smc);
-		sk->sk_state = SMC_CLOSED;
-		sock_put(sk); /* passive closing */
-		break;
 	case SMC_APPCLOSEWAIT1:
 	case SMC_APPCLOSEWAIT2:
+		sk->sk_state = SMC_PEERABORTWAIT;
 		smc_close_cancel_work(smc);
+		if (sk->sk_state != SMC_PEERABORTWAIT)
+			break;
 		sk->sk_state = SMC_CLOSED;
-		sock_put(sk); /* postponed passive closing */
+		sock_put(sk); /* (postponed) passive closing */
 		break;
 	case SMC_PEERCLOSEWAIT1:
 	case SMC_PEERCLOSEWAIT2:
 	case SMC_PEERFINCLOSEWAIT:
 		sk->sk_state = SMC_PEERABORTWAIT;
 		smc_close_cancel_work(smc);
+		if (sk->sk_state != SMC_PEERABORTWAIT)
+			break;
 		sk->sk_state = SMC_CLOSED;
 		smc_conn_free(&smc->conn);
 		release_clcsock = true;
@@ -159,6 +158,8 @@ void smc_close_active_abort(struct smc_sock *smc)
 	case SMC_APPFINCLOSEWAIT:
 		sk->sk_state = SMC_PEERABORTWAIT;
 		smc_close_cancel_work(smc);
+		if (sk->sk_state != SMC_PEERABORTWAIT)
+			break;
 		sk->sk_state = SMC_CLOSED;
 		smc_conn_free(&smc->conn);
 		release_clcsock = true;
-- 
GitLab


From 9fa2dd946743ae6f30dc4830da19147bf100a7f2 Mon Sep 17 00:00:00 2001
From: Dave Hansen <dave.hansen@linux.intel.com>
Date: Thu, 3 Sep 2020 13:40:28 -0700
Subject: [PATCH 1010/1341] mm: fix pin vs. gup mismatch with gate pages

Gate pages were missed when converting from get to pin_user_pages().
This can lead to refcount imbalances.  This is reliably and quickly
reproducible running the x86 selftests when vsyscall=emulate is enabled
(the default).  Fix by using try_grab_page() with appropriate flags
passed.

The long story:

Today, pin_user_pages() and get_user_pages() are similar interfaces for
manipulating page reference counts.  However, "pins" use a "bias" value
and manipulate the actual reference count by 1024 instead of 1 used by
plain "gets".

That means that pin_user_pages() must be matched with unpin_user_pages()
and can't be mixed with a plain put_user_pages() or put_page().

Enter gate pages, like the vsyscall page.  They are pages usually in the
kernel image, but which are mapped to userspace.  Userspace is allowed
access to them, including interfaces using get/pin_user_pages().  The
refcount of these kernel pages is manipulated just like a normal user
page on the get/pin side so that the put/unpin side can work the same
for normal user pages or gate pages.

get_gate_page() uses try_get_page() which only bumps the refcount by
1, not 1024, even if called in the pin_user_pages() path.  If someone
pins a gate page, this happens:

	pin_user_pages()
		get_gate_page()
			try_get_page() // bump refcount +1
	... some time later
	unpin_user_pages()
		page_ref_sub_and_test(page, 1024))

... and boom, we get a refcount off by 1023.  This is reliably and
quickly reproducible running the x86 selftests when booted with
vsyscall=emulate (the default).  The selftests use ptrace(), but I
suspect anything using pin_user_pages() on gate pages could hit this.

To fix it, simply use try_grab_page() instead of try_get_page(), and
pass 'gup_flags' in so that FOLL_PIN can be respected.

This bug traces back to the very beginning of the FOLL_PIN support in
commit 3faa52c03f44 ("mm/gup: track FOLL_PIN pages"), which showed up in
the 5.7 release.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Fixes: 3faa52c03f44 ("mm/gup: track FOLL_PIN pages")
Reported-by: Peter Zijlstra <peterz@infradead.org>
Reviewed-by: John Hubbard <jhubbard@nvidia.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: x86@kernel.org
Cc: Jann Horn <jannh@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/gup.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/gup.c b/mm/gup.c
index 6f47697f8fb0b..0d8d76f10ac61 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -843,7 +843,7 @@ static int get_gate_page(struct mm_struct *mm, unsigned long address,
 			goto unmap;
 		*page = pte_page(*pte);
 	}
-	if (unlikely(!try_get_page(*page))) {
+	if (unlikely(!try_grab_page(*page, gup_flags))) {
 		ret = -ENOMEM;
 		goto unmap;
 	}
-- 
GitLab


From 8891adc61dce2a8a41fc0c23262b681c3ec4b73a Mon Sep 17 00:00:00 2001
From: Andy Lutomirski <luto@kernel.org>
Date: Thu, 3 Sep 2020 13:40:30 -0700
Subject: [PATCH 1011/1341] selftests/x86/test_vsyscall: Improve the
 process_vm_readv() test

The existing code accepted process_vm_readv() success or failure as long
as it didn't return garbage.  This is too weak: if the vsyscall page is
readable, then process_vm_readv() should succeed and, if the page is not
readable, then it should fail.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Cc: x86@kernel.org
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Jann Horn <jannh@google.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 tools/testing/selftests/x86/test_vsyscall.c | 22 +++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/x86/test_vsyscall.c b/tools/testing/selftests/x86/test_vsyscall.c
index c41f24b517f40..65c141ebfbbde 100644
--- a/tools/testing/selftests/x86/test_vsyscall.c
+++ b/tools/testing/selftests/x86/test_vsyscall.c
@@ -462,6 +462,17 @@ static int test_vsys_x(void)
 	return 0;
 }
 
+/*
+ * Debuggers expect ptrace() to be able to peek at the vsyscall page.
+ * Use process_vm_readv() as a proxy for ptrace() to test this.  We
+ * want it to work in the vsyscall=emulate case and to fail in the
+ * vsyscall=xonly case.
+ *
+ * It's worth noting that this ABI is a bit nutty.  write(2) can't
+ * read from the vsyscall page on any kernel version or mode.  The
+ * fact that ptrace() ever worked was a nice courtesy of old kernels,
+ * but the code to support it is fairly gross.
+ */
 static int test_process_vm_readv(void)
 {
 #ifdef __x86_64__
@@ -477,8 +488,12 @@ static int test_process_vm_readv(void)
 	remote.iov_len = 4096;
 	ret = process_vm_readv(getpid(), &local, 1, &remote, 1, 0);
 	if (ret != 4096) {
-		printf("[OK]\tprocess_vm_readv() failed (ret = %d, errno = %d)\n", ret, errno);
-		return 0;
+		/*
+		 * We expect process_vm_readv() to work if and only if the
+		 * vsyscall page is readable.
+		 */
+		printf("[%s]\tprocess_vm_readv() failed (ret = %d, errno = %d)\n", vsyscall_map_r ? "FAIL" : "OK", ret, errno);
+		return vsyscall_map_r ? 1 : 0;
 	}
 
 	if (vsyscall_map_r) {
@@ -488,6 +503,9 @@ static int test_process_vm_readv(void)
 			printf("[FAIL]\tIt worked but returned incorrect data\n");
 			return 1;
 		}
+	} else {
+		printf("[FAIL]\tprocess_rm_readv() succeeded, but it should have failed in this configuration\n");
+		return 1;
 	}
 #endif
 
-- 
GitLab


From ccae0f36d500aef727f98acd8d0601e6b262a513 Mon Sep 17 00:00:00 2001
From: Huang Ying <ying.huang@intel.com>
Date: Fri, 4 Sep 2020 14:10:47 +0800
Subject: [PATCH 1012/1341] x86, fakenuma: Fix invalid starting node ID

Commit:

  cc9aec03e58f ("x86/numa_emulation: Introduce uniform split capability")

uses "-1" as the starting node ID, which causes the strange kernel log as
follows, when "numa=fake=32G" is added to the kernel command line:

    Faking node -1 at [mem 0x0000000000000000-0x0000000893ffffff] (35136MB)
    Faking node 0 at [mem 0x0000001840000000-0x000000203fffffff] (32768MB)
    Faking node 1 at [mem 0x0000000894000000-0x000000183fffffff] (64192MB)
    Faking node 2 at [mem 0x0000002040000000-0x000000283fffffff] (32768MB)
    Faking node 3 at [mem 0x0000002840000000-0x000000303fffffff] (32768MB)

And finally the kernel crashes:

    BUG: Bad page state in process swapper  pfn:00011
    page:(____ptrval____) refcount:0 mapcount:1 mapping:(____ptrval____) index:0x55cd7e44b270 pfn:0x11
    failed to read mapping contents, not a valid kernel address?
    flags: 0x5(locked|uptodate)
    raw: 0000000000000005 000055cd7e44af30 000055cd7e44af50 0000000100000006
    raw: 000055cd7e44b270 000055cd7e44b290 0000000000000000 000055cd7e44b510
    page dumped because: page still charged to cgroup
    page->mem_cgroup:000055cd7e44b510
    Modules linked in:
    CPU: 0 PID: 0 Comm: swapper Not tainted 5.9.0-rc2 #1
    Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019
    Call Trace:
     dump_stack+0x57/0x80
     bad_page.cold+0x63/0x94
     __free_pages_ok+0x33f/0x360
     memblock_free_all+0x127/0x195
     mem_init+0x23/0x1f5
     start_kernel+0x219/0x4f5
     secondary_startup_64+0xb6/0xc0

Fix this bug via using 0 as the starting node ID.  This restores the
original behavior before cc9aec03e58f.

[ mingo: Massaged the changelog. ]

Fixes: cc9aec03e58f ("x86/numa_emulation: Introduce uniform split capability")
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200904061047.612950-1-ying.huang@intel.com
---
 arch/x86/mm/numa_emulation.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/numa_emulation.c b/arch/x86/mm/numa_emulation.c
index c5174b4e318b4..683cd12f47938 100644
--- a/arch/x86/mm/numa_emulation.c
+++ b/arch/x86/mm/numa_emulation.c
@@ -321,7 +321,7 @@ static int __init split_nodes_size_interleave(struct numa_meminfo *ei,
 					      u64 addr, u64 max_addr, u64 size)
 {
 	return split_nodes_size_interleave_uniform(ei, pi, addr, max_addr, size,
-			0, NULL, NUMA_NO_NODE);
+			0, NULL, 0);
 }
 
 static int __init setup_emu2phys_nid(int *dfl_phys_nid)
-- 
GitLab


From 1b0df11fde0f14a269a181b3b7f5122415bc5ed7 Mon Sep 17 00:00:00 2001
From: Daniel Jordan <daniel.m.jordan@oracle.com>
Date: Wed, 2 Sep 2020 13:07:56 -0400
Subject: [PATCH 1013/1341] padata: fix possible padata_works_lock deadlock

syzbot reports,

  WARNING: inconsistent lock state
  5.9.0-rc2-syzkaller #0 Not tainted
  --------------------------------
  inconsistent {IN-SOFTIRQ-W} -> {SOFTIRQ-ON-W} usage.
  syz-executor.0/26715 takes:
  (padata_works_lock){+.?.}-{2:2}, at: padata_do_parallel kernel/padata.c:220
  {IN-SOFTIRQ-W} state was registered at:
    spin_lock include/linux/spinlock.h:354 [inline]
    padata_do_parallel kernel/padata.c:220
    ...
    __do_softirq kernel/softirq.c:298
    ...
    sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1091
    asm_sysvec_apic_timer_interrupt arch/x86/include/asm/idtentry.h:581

   Possible unsafe locking scenario:

         CPU0
         ----
    lock(padata_works_lock);
    <Interrupt>
      lock(padata_works_lock);

padata_do_parallel() takes padata_works_lock with softirqs enabled, so a
deadlock is possible if, on the same CPU, the lock is acquired in
process context and then softirq handling done in an interrupt leads to
the same path.

Fix by leaving softirqs disabled while do_parallel holds
padata_works_lock.

Reported-by: syzbot+f4b9f49e38e25eb4ef52@syzkaller.appspotmail.com
Fixes: 4611ce2246889 ("padata: allocate work structures for parallel jobs from a pool")
Signed-off-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
 kernel/padata.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/padata.c b/kernel/padata.c
index 16cb894dc272b..d4d3ba6e1728a 100644
--- a/kernel/padata.c
+++ b/kernel/padata.c
@@ -215,12 +215,13 @@ int padata_do_parallel(struct padata_shell *ps,
 	padata->pd = pd;
 	padata->cb_cpu = *cb_cpu;
 
-	rcu_read_unlock_bh();
-
 	spin_lock(&padata_works_lock);
 	padata->seq_nr = ++pd->seq_nr;
 	pw = padata_work_alloc();
 	spin_unlock(&padata_works_lock);
+
+	rcu_read_unlock_bh();
+
 	if (pw) {
 		padata_work_init(pw, padata_parallel_worker, padata, 0);
 		queue_work(pinst->parallel_wq, &pw->pw_work);
-- 
GitLab


From aecb2016c90a1b620e21c9e143afbdc9666cce52 Mon Sep 17 00:00:00 2001
From: Roger Pau Monne <roger.pau@citrix.com>
Date: Tue, 1 Sep 2020 10:33:24 +0200
Subject: [PATCH 1014/1341] xen/balloon: add header guard
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In order to protect against the header being included multiple times
on the same compilation unit.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20200901083326.21264-2-roger.pau@citrix.com
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 include/xen/balloon.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/xen/balloon.h b/include/xen/balloon.h
index 6fb95aa194051..6dbdb0b3fd03d 100644
--- a/include/xen/balloon.h
+++ b/include/xen/balloon.h
@@ -2,6 +2,8 @@
 /******************************************************************************
  * Xen balloon functionality
  */
+#ifndef _XEN_BALLOON_H
+#define _XEN_BALLOON_H
 
 #define RETRY_UNLIMITED	0
 
@@ -34,3 +36,5 @@ static inline void xen_balloon_init(void)
 {
 }
 #endif
+
+#endif	/* _XEN_BALLOON_H */
-- 
GitLab


From 4533d3aed857c558d6aabd00d0cb04100c5a2258 Mon Sep 17 00:00:00 2001
From: Roger Pau Monne <roger.pau@citrix.com>
Date: Tue, 1 Sep 2020 10:33:25 +0200
Subject: [PATCH 1015/1341] memremap: rename MEMORY_DEVICE_DEVDAX to
 MEMORY_DEVICE_GENERIC
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

This is in preparation for the logic behind MEMORY_DEVICE_DEVDAX also
being used by non DAX devices.

No functional change intended.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Link: https://lore.kernel.org/r/20200901083326.21264-3-roger.pau@citrix.com
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 drivers/dax/device.c     | 2 +-
 include/linux/memremap.h | 9 ++++-----
 mm/memremap.c            | 2 +-
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/dax/device.c b/drivers/dax/device.c
index 4c0af2eb7e196..1e89513f3c596 100644
--- a/drivers/dax/device.c
+++ b/drivers/dax/device.c
@@ -429,7 +429,7 @@ int dev_dax_probe(struct device *dev)
 		return -EBUSY;
 	}
 
-	dev_dax->pgmap.type = MEMORY_DEVICE_DEVDAX;
+	dev_dax->pgmap.type = MEMORY_DEVICE_GENERIC;
 	addr = devm_memremap_pages(dev, &dev_dax->pgmap);
 	if (IS_ERR(addr))
 		return PTR_ERR(addr);
diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index 5f5b2df06e610..e5862746751b1 100644
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -46,11 +46,10 @@ struct vmem_altmap {
  * wakeup is used to coordinate physical address space management (ex:
  * fs truncate/hole punch) vs pinned pages (ex: device dma).
  *
- * MEMORY_DEVICE_DEVDAX:
+ * MEMORY_DEVICE_GENERIC:
  * Host memory that has similar access semantics as System RAM i.e. DMA
- * coherent and supports page pinning. In contrast to
- * MEMORY_DEVICE_FS_DAX, this memory is access via a device-dax
- * character device.
+ * coherent and supports page pinning. This is for example used by DAX devices
+ * that expose memory using a character device.
  *
  * MEMORY_DEVICE_PCI_P2PDMA:
  * Device memory residing in a PCI BAR intended for use with Peer-to-Peer
@@ -60,7 +59,7 @@ enum memory_type {
 	/* 0 is reserved to catch uninitialized type fields */
 	MEMORY_DEVICE_PRIVATE = 1,
 	MEMORY_DEVICE_FS_DAX,
-	MEMORY_DEVICE_DEVDAX,
+	MEMORY_DEVICE_GENERIC,
 	MEMORY_DEVICE_PCI_P2PDMA,
 };
 
diff --git a/mm/memremap.c b/mm/memremap.c
index 03e38b7a38f1a..006dace60b1a9 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -216,7 +216,7 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
 			return ERR_PTR(-EINVAL);
 		}
 		break;
-	case MEMORY_DEVICE_DEVDAX:
+	case MEMORY_DEVICE_GENERIC:
 		need_devmap_managed = false;
 		break;
 	case MEMORY_DEVICE_PCI_P2PDMA:
-- 
GitLab


From 9e2369c06c8a181478039258a4598c1ddd2cadfa Mon Sep 17 00:00:00 2001
From: Roger Pau Monne <roger.pau@citrix.com>
Date: Tue, 1 Sep 2020 10:33:26 +0200
Subject: [PATCH 1016/1341] xen: add helpers to allocate unpopulated memory
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

To be used in order to create foreign mappings. This is based on the
ZONE_DEVICE facility which is used by persistent memory devices in
order to create struct pages and kernel virtual mappings for the IOMEM
areas of such devices. Note that on kernels without support for
ZONE_DEVICE Xen will fallback to use ballooned pages in order to
create foreign mappings.

The newly added helpers use the same parameters as the existing
{alloc/free}_xenballooned_pages functions, which allows for in-place
replacement of the callers. Once a memory region has been added to be
used as scratch mapping space it will no longer be released, and pages
returned are kept in a linked list. This allows to have a buffer of
pages and prevents resorting to frequent additions and removals of
regions.

If enabled (because ZONE_DEVICE is supported) the usage of the new
functionality untangles Xen balloon and RAM hotplug from the usage of
unpopulated physical memory ranges to map foreign pages, which is the
correct thing to do in order to avoid mappings of foreign pages depend
on memory hotplug.

Note the driver is currently not enabled on Arm platforms because it
would interfere with the identity mapping required on some platforms.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20200901083326.21264-4-roger.pau@citrix.com
Signed-off-by: Juergen Gross <jgross@suse.com>
---
 drivers/gpu/drm/xen/xen_drm_front_gem.c |   9 +-
 drivers/xen/Kconfig                     |  10 ++
 drivers/xen/Makefile                    |   1 +
 drivers/xen/balloon.c                   |   4 +-
 drivers/xen/grant-table.c               |   4 +-
 drivers/xen/privcmd.c                   |   4 +-
 drivers/xen/unpopulated-alloc.c         | 183 ++++++++++++++++++++++++
 drivers/xen/xenbus/xenbus_client.c      |   6 +-
 drivers/xen/xlate_mmu.c                 |   4 +-
 include/xen/xen.h                       |   9 ++
 10 files changed, 219 insertions(+), 15 deletions(-)
 create mode 100644 drivers/xen/unpopulated-alloc.c

diff --git a/drivers/gpu/drm/xen/xen_drm_front_gem.c b/drivers/gpu/drm/xen/xen_drm_front_gem.c
index 39ff95b75357d..534daf37c97ed 100644
--- a/drivers/gpu/drm/xen/xen_drm_front_gem.c
+++ b/drivers/gpu/drm/xen/xen_drm_front_gem.c
@@ -18,6 +18,7 @@
 #include <drm/drm_probe_helper.h>
 
 #include <xen/balloon.h>
+#include <xen/xen.h>
 
 #include "xen_drm_front.h"
 #include "xen_drm_front_gem.h"
@@ -99,8 +100,8 @@ static struct xen_gem_object *gem_create(struct drm_device *dev, size_t size)
 		 * allocate ballooned pages which will be used to map
 		 * grant references provided by the backend
 		 */
-		ret = alloc_xenballooned_pages(xen_obj->num_pages,
-					       xen_obj->pages);
+		ret = xen_alloc_unpopulated_pages(xen_obj->num_pages,
+					          xen_obj->pages);
 		if (ret < 0) {
 			DRM_ERROR("Cannot allocate %zu ballooned pages: %d\n",
 				  xen_obj->num_pages, ret);
@@ -152,8 +153,8 @@ void xen_drm_front_gem_free_object_unlocked(struct drm_gem_object *gem_obj)
 	} else {
 		if (xen_obj->pages) {
 			if (xen_obj->be_alloc) {
-				free_xenballooned_pages(xen_obj->num_pages,
-							xen_obj->pages);
+				xen_free_unpopulated_pages(xen_obj->num_pages,
+							   xen_obj->pages);
 				gem_free_pages_array(xen_obj);
 			} else {
 				drm_gem_put_pages(&xen_obj->base,
diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig
index 46e7fd099904e..0ab54df825207 100644
--- a/drivers/xen/Kconfig
+++ b/drivers/xen/Kconfig
@@ -324,4 +324,14 @@ config XEN_HAVE_VPMU
 config XEN_FRONT_PGDIR_SHBUF
 	tristate
 
+config XEN_UNPOPULATED_ALLOC
+	bool "Use unpopulated memory ranges for guest mappings"
+	depends on X86 && ZONE_DEVICE
+	default XEN_BACKEND || XEN_GNTDEV || XEN_DOM0
+	help
+	  Use unpopulated memory ranges in order to create mappings for guest
+	  memory regions, including grant maps and foreign pages. This avoids
+	  having to balloon out RAM regions in order to obtain physical memory
+	  space to create such mappings.
+
 endmenu
diff --git a/drivers/xen/Makefile b/drivers/xen/Makefile
index 0d322f3d90cdb..3cca2be28824a 100644
--- a/drivers/xen/Makefile
+++ b/drivers/xen/Makefile
@@ -42,3 +42,4 @@ xen-gntdev-$(CONFIG_XEN_GNTDEV_DMABUF)	+= gntdev-dmabuf.o
 xen-gntalloc-y				:= gntalloc.o
 xen-privcmd-y				:= privcmd.o privcmd-buf.o
 obj-$(CONFIG_XEN_FRONT_PGDIR_SHBUF)	+= xen-front-pgdir-shbuf.o
+obj-$(CONFIG_XEN_UNPOPULATED_ALLOC)	+= unpopulated-alloc.o
diff --git a/drivers/xen/balloon.c b/drivers/xen/balloon.c
index b1d8b028bf804..4bfbe71705e4d 100644
--- a/drivers/xen/balloon.c
+++ b/drivers/xen/balloon.c
@@ -654,7 +654,7 @@ void free_xenballooned_pages(int nr_pages, struct page **pages)
 }
 EXPORT_SYMBOL(free_xenballooned_pages);
 
-#ifdef CONFIG_XEN_PV
+#if defined(CONFIG_XEN_PV) && !defined(CONFIG_XEN_UNPOPULATED_ALLOC)
 static void __init balloon_add_region(unsigned long start_pfn,
 				      unsigned long pages)
 {
@@ -708,7 +708,7 @@ static int __init balloon_init(void)
 	register_sysctl_table(xen_root);
 #endif
 
-#ifdef CONFIG_XEN_PV
+#if defined(CONFIG_XEN_PV) && !defined(CONFIG_XEN_UNPOPULATED_ALLOC)
 	{
 		int i;
 
diff --git a/drivers/xen/grant-table.c b/drivers/xen/grant-table.c
index 8d06bf1cc3479..523dcdf39cc94 100644
--- a/drivers/xen/grant-table.c
+++ b/drivers/xen/grant-table.c
@@ -801,7 +801,7 @@ int gnttab_alloc_pages(int nr_pages, struct page **pages)
 {
 	int ret;
 
-	ret = alloc_xenballooned_pages(nr_pages, pages);
+	ret = xen_alloc_unpopulated_pages(nr_pages, pages);
 	if (ret < 0)
 		return ret;
 
@@ -836,7 +836,7 @@ EXPORT_SYMBOL_GPL(gnttab_pages_clear_private);
 void gnttab_free_pages(int nr_pages, struct page **pages)
 {
 	gnttab_pages_clear_private(nr_pages, pages);
-	free_xenballooned_pages(nr_pages, pages);
+	xen_free_unpopulated_pages(nr_pages, pages);
 }
 EXPORT_SYMBOL_GPL(gnttab_free_pages);
 
diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c
index 095d683ad574c..8bcb0ce223a5d 100644
--- a/drivers/xen/privcmd.c
+++ b/drivers/xen/privcmd.c
@@ -425,7 +425,7 @@ static int alloc_empty_pages(struct vm_area_struct *vma, int numpgs)
 	if (pages == NULL)
 		return -ENOMEM;
 
-	rc = alloc_xenballooned_pages(numpgs, pages);
+	rc = xen_alloc_unpopulated_pages(numpgs, pages);
 	if (rc != 0) {
 		pr_warn("%s Could not alloc %d pfns rc:%d\n", __func__,
 			numpgs, rc);
@@ -896,7 +896,7 @@ static void privcmd_close(struct vm_area_struct *vma)
 
 	rc = xen_unmap_domain_gfn_range(vma, numgfns, pages);
 	if (rc == 0)
-		free_xenballooned_pages(numpgs, pages);
+		xen_free_unpopulated_pages(numpgs, pages);
 	else
 		pr_crit("unable to unmap MFN range: leaking %d pages. rc=%d\n",
 			numpgs, rc);
diff --git a/drivers/xen/unpopulated-alloc.c b/drivers/xen/unpopulated-alloc.c
new file mode 100644
index 0000000000000..3b98dc9214268
--- /dev/null
+++ b/drivers/xen/unpopulated-alloc.c
@@ -0,0 +1,183 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/errno.h>
+#include <linux/gfp.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/memremap.h>
+#include <linux/slab.h>
+
+#include <asm/page.h>
+
+#include <xen/page.h>
+#include <xen/xen.h>
+
+static DEFINE_MUTEX(list_lock);
+static LIST_HEAD(page_list);
+static unsigned int list_count;
+
+static int fill_list(unsigned int nr_pages)
+{
+	struct dev_pagemap *pgmap;
+	void *vaddr;
+	unsigned int i, alloc_pages = round_up(nr_pages, PAGES_PER_SECTION);
+	int ret;
+
+	pgmap = kzalloc(sizeof(*pgmap), GFP_KERNEL);
+	if (!pgmap)
+		return -ENOMEM;
+
+	pgmap->type = MEMORY_DEVICE_GENERIC;
+	pgmap->res.name = "Xen scratch";
+	pgmap->res.flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+
+	ret = allocate_resource(&iomem_resource, &pgmap->res,
+				alloc_pages * PAGE_SIZE, 0, -1,
+				PAGES_PER_SECTION * PAGE_SIZE, NULL, NULL);
+	if (ret < 0) {
+		pr_err("Cannot allocate new IOMEM resource\n");
+		kfree(pgmap);
+		return ret;
+	}
+
+#ifdef CONFIG_XEN_HAVE_PVMMU
+        /*
+         * memremap will build page tables for the new memory so
+         * the p2m must contain invalid entries so the correct
+         * non-present PTEs will be written.
+         *
+         * If a failure occurs, the original (identity) p2m entries
+         * are not restored since this region is now known not to
+         * conflict with any devices.
+         */
+	if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+		xen_pfn_t pfn = PFN_DOWN(pgmap->res.start);
+
+		for (i = 0; i < alloc_pages; i++) {
+			if (!set_phys_to_machine(pfn + i, INVALID_P2M_ENTRY)) {
+				pr_warn("set_phys_to_machine() failed, no memory added\n");
+				release_resource(&pgmap->res);
+				kfree(pgmap);
+				return -ENOMEM;
+			}
+                }
+	}
+#endif
+
+	vaddr = memremap_pages(pgmap, NUMA_NO_NODE);
+	if (IS_ERR(vaddr)) {
+		pr_err("Cannot remap memory range\n");
+		release_resource(&pgmap->res);
+		kfree(pgmap);
+		return PTR_ERR(vaddr);
+	}
+
+	for (i = 0; i < alloc_pages; i++) {
+		struct page *pg = virt_to_page(vaddr + PAGE_SIZE * i);
+
+		BUG_ON(!virt_addr_valid(vaddr + PAGE_SIZE * i));
+		list_add(&pg->lru, &page_list);
+		list_count++;
+	}
+
+	return 0;
+}
+
+/**
+ * xen_alloc_unpopulated_pages - alloc unpopulated pages
+ * @nr_pages: Number of pages
+ * @pages: pages returned
+ * @return 0 on success, error otherwise
+ */
+int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages)
+{
+	unsigned int i;
+	int ret = 0;
+
+	mutex_lock(&list_lock);
+	if (list_count < nr_pages) {
+		ret = fill_list(nr_pages - list_count);
+		if (ret)
+			goto out;
+	}
+
+	for (i = 0; i < nr_pages; i++) {
+		struct page *pg = list_first_entry_or_null(&page_list,
+							   struct page,
+							   lru);
+
+		BUG_ON(!pg);
+		list_del(&pg->lru);
+		list_count--;
+		pages[i] = pg;
+
+#ifdef CONFIG_XEN_HAVE_PVMMU
+		if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+			ret = xen_alloc_p2m_entry(page_to_pfn(pg));
+			if (ret < 0) {
+				unsigned int j;
+
+				for (j = 0; j <= i; j++) {
+					list_add(&pages[j]->lru, &page_list);
+					list_count++;
+				}
+				goto out;
+			}
+		}
+#endif
+	}
+
+out:
+	mutex_unlock(&list_lock);
+	return ret;
+}
+EXPORT_SYMBOL(xen_alloc_unpopulated_pages);
+
+/**
+ * xen_free_unpopulated_pages - return unpopulated pages
+ * @nr_pages: Number of pages
+ * @pages: pages to return
+ */
+void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages)
+{
+	unsigned int i;
+
+	mutex_lock(&list_lock);
+	for (i = 0; i < nr_pages; i++) {
+		list_add(&pages[i]->lru, &page_list);
+		list_count++;
+	}
+	mutex_unlock(&list_lock);
+}
+EXPORT_SYMBOL(xen_free_unpopulated_pages);
+
+#ifdef CONFIG_XEN_PV
+static int __init init(void)
+{
+	unsigned int i;
+
+	if (!xen_domain())
+		return -ENODEV;
+
+	if (!xen_pv_domain())
+		return 0;
+
+	/*
+	 * Initialize with pages from the extra memory regions (see
+	 * arch/x86/xen/setup.c).
+	 */
+	for (i = 0; i < XEN_EXTRA_MEM_MAX_REGIONS; i++) {
+		unsigned int j;
+
+		for (j = 0; j < xen_extra_mem[i].n_pfns; j++) {
+			struct page *pg =
+				pfn_to_page(xen_extra_mem[i].start_pfn + j);
+
+			list_add(&pg->lru, &page_list);
+			list_count++;
+		}
+	}
+
+	return 0;
+}
+subsys_initcall(init);
+#endif
diff --git a/drivers/xen/xenbus/xenbus_client.c b/drivers/xen/xenbus/xenbus_client.c
index 907bcbb93afbf..2690318ad50f4 100644
--- a/drivers/xen/xenbus/xenbus_client.c
+++ b/drivers/xen/xenbus/xenbus_client.c
@@ -621,7 +621,7 @@ static int xenbus_map_ring_hvm(struct xenbus_device *dev,
 	bool leaked = false;
 	unsigned int nr_pages = XENBUS_PAGES(nr_grefs);
 
-	err = alloc_xenballooned_pages(nr_pages, node->hvm.pages);
+	err = xen_alloc_unpopulated_pages(nr_pages, node->hvm.pages);
 	if (err)
 		goto out_err;
 
@@ -662,7 +662,7 @@ static int xenbus_map_ring_hvm(struct xenbus_device *dev,
 			 addr, nr_pages);
  out_free_ballooned_pages:
 	if (!leaked)
-		free_xenballooned_pages(nr_pages, node->hvm.pages);
+		xen_free_unpopulated_pages(nr_pages, node->hvm.pages);
  out_err:
 	return err;
 }
@@ -858,7 +858,7 @@ static int xenbus_unmap_ring_hvm(struct xenbus_device *dev, void *vaddr)
 			       info.addrs);
 	if (!rv) {
 		vunmap(vaddr);
-		free_xenballooned_pages(nr_pages, node->hvm.pages);
+		xen_free_unpopulated_pages(nr_pages, node->hvm.pages);
 	}
 	else
 		WARN(1, "Leaking %p, size %u page(s)\n", vaddr, nr_pages);
diff --git a/drivers/xen/xlate_mmu.c b/drivers/xen/xlate_mmu.c
index 7b1077f0abcb0..34742c6e189e3 100644
--- a/drivers/xen/xlate_mmu.c
+++ b/drivers/xen/xlate_mmu.c
@@ -232,7 +232,7 @@ int __init xen_xlate_map_ballooned_pages(xen_pfn_t **gfns, void **virt,
 		kfree(pages);
 		return -ENOMEM;
 	}
-	rc = alloc_xenballooned_pages(nr_pages, pages);
+	rc = xen_alloc_unpopulated_pages(nr_pages, pages);
 	if (rc) {
 		pr_warn("%s Couldn't balloon alloc %ld pages rc:%d\n", __func__,
 			nr_pages, rc);
@@ -249,7 +249,7 @@ int __init xen_xlate_map_ballooned_pages(xen_pfn_t **gfns, void **virt,
 	if (!vaddr) {
 		pr_warn("%s Couldn't map %ld pages rc:%d\n", __func__,
 			nr_pages, rc);
-		free_xenballooned_pages(nr_pages, pages);
+		xen_free_unpopulated_pages(nr_pages, pages);
 		kfree(pages);
 		kfree(pfns);
 		return -ENOMEM;
diff --git a/include/xen/xen.h b/include/xen/xen.h
index 19a72f591e2bd..43efba045acc7 100644
--- a/include/xen/xen.h
+++ b/include/xen/xen.h
@@ -52,4 +52,13 @@ bool xen_biovec_phys_mergeable(const struct bio_vec *vec1,
 extern u64 xen_saved_max_mem_size;
 #endif
 
+#ifdef CONFIG_XEN_UNPOPULATED_ALLOC
+int xen_alloc_unpopulated_pages(unsigned int nr_pages, struct page **pages);
+void xen_free_unpopulated_pages(unsigned int nr_pages, struct page **pages);
+#else
+#define xen_alloc_unpopulated_pages alloc_xenballooned_pages
+#define xen_free_unpopulated_pages free_xenballooned_pages
+#include <xen/balloon.h>
+#endif
+
 #endif	/* _XEN_XEN_H */
-- 
GitLab


From 0ee9f600e69d901d31469359287b90bbe8e54553 Mon Sep 17 00:00:00 2001
From: Jernej Skrabec <jernej.skrabec@siol.net>
Date: Wed, 2 Sep 2020 00:03:05 +0200
Subject: [PATCH 1017/1341] drm/sun4i: Fix DE2 YVU handling

Function sun8i_vi_layer_get_csc_mode() is supposed to return CSC mode
but due to inproper return type (bool instead of u32) it returns just 0
or 1. Colors are wrong for YVU formats because of that.

Fixes: daab3d0e8e2b ("drm/sun4i: de2: csc_mode in de2 format struct is mostly redundant")
Reported-by: Roman Stratiienko <r.stratiienko@gmail.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Tested-by: Roman Stratiienko <r.stratiienko@gmail.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20200901220305.6809-1-jernej.skrabec@siol.net
---
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index 22c8c5375d0db..c0147af6a8406 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -211,7 +211,7 @@ static int sun8i_vi_layer_update_coord(struct sun8i_mixer *mixer, int channel,
 	return 0;
 }
 
-static bool sun8i_vi_layer_get_csc_mode(const struct drm_format_info *format)
+static u32 sun8i_vi_layer_get_csc_mode(const struct drm_format_info *format)
 {
 	if (!format->is_yuv)
 		return SUN8I_CSC_MODE_OFF;
-- 
GitLab


From e359c70462d2a82aae80274d027351d38792dde6 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Tue, 28 Jul 2020 15:48:09 +0200
Subject: [PATCH 1018/1341] drm/sun4i: backend: Support alpha property on
 lowest plane

Unlike what we previously thought, only the per-pixel alpha is broken on
the lowest plane and the per-plane alpha isn't. Remove the check on the
alpha property being set on the lowest plane to reject a mode.

Fixes: dcf496a6a608 ("drm/sun4i: sun4i: Introduce a quirk for lowest plane alpha support")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Cc: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200728134810.883457-1-maxime@cerno.tech
---
 drivers/gpu/drm/sun4i/sun4i_backend.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 072ea113e6be5..30672c4c634da 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -589,8 +589,7 @@ static int sun4i_backend_atomic_check(struct sunxi_engine *engine,
 
 	/* We can't have an alpha plane at the lowest position */
 	if (!backend->quirks->supports_lowest_plane_alpha &&
-	    (plane_states[0]->fb->format->has_alpha ||
-	    (plane_states[0]->alpha != DRM_BLEND_ALPHA_OPAQUE)))
+	    (plane_states[0]->alpha != DRM_BLEND_ALPHA_OPAQUE))
 		return -EINVAL;
 
 	for (i = 1; i < num_planes; i++) {
-- 
GitLab


From 5e2e2600a3744491a8b49b92597c13b693692082 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Tue, 28 Jul 2020 15:48:10 +0200
Subject: [PATCH 1019/1341] drm/sun4i: backend: Disable alpha on the lowest
 plane on the A20

Unlike we previously thought, the per-pixel alpha is just as broken on the
A20 as it is on the A10. Remove the quirk that says we can use it.

Fixes: dcf496a6a608 ("drm/sun4i: sun4i: Introduce a quirk for lowest plane alpha support")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Cc: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200728134810.883457-2-maxime@cerno.tech
---
 drivers/gpu/drm/sun4i/sun4i_backend.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 30672c4c634da..ed5d866178028 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -994,7 +994,6 @@ static const struct sun4i_backend_quirks sun6i_backend_quirks = {
 
 static const struct sun4i_backend_quirks sun7i_backend_quirks = {
 	.needs_output_muxing = true,
-	.supports_lowest_plane_alpha = true,
 };
 
 static const struct sun4i_backend_quirks sun8i_a33_backend_quirks = {
-- 
GitLab


From 365d2a23663711c32e778c9c18b07163f9193925 Mon Sep 17 00:00:00 2001
From: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Date: Tue, 25 Aug 2020 07:38:28 +0200
Subject: [PATCH 1020/1341] MAINTAINERS: Update QUALCOMM IOMMU after Arm SMMU
 drivers move

Commit e86d1aa8b60f ("iommu/arm-smmu: Move Arm SMMU drivers into their own
subdirectory") moved drivers/iommu/qcom_iommu.c to
drivers/iommu/arm/arm-smmu/qcom_iommu.c amongst other moves, adjusted some
sections in MAINTAINERS, but missed adjusting the QUALCOMM IOMMU section.

Hence, ./scripts/get_maintainer.pl --self-test=patterns complains:

  warning: no file matches    F:    drivers/iommu/qcom_iommu.c

Update the file entry in MAINTAINERS to the new location.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200825053828.4166-1-lukas.bulwahn@gmail.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 MAINTAINERS | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index e4647c84c987e..0079d067b74c1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14366,7 +14366,7 @@ M:	Rob Clark <robdclark@gmail.com>
 L:	iommu@lists.linux-foundation.org
 L:	linux-arm-msm@vger.kernel.org
 S:	Maintained
-F:	drivers/iommu/qcom_iommu.c
+F:	drivers/iommu/arm/arm-smmu/qcom_iommu.c
 
 QUALCOMM IPCC MAILBOX DRIVER
 M:	Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
-- 
GitLab


From 6e4e9ec65078093165463c13d4eb92b3e8d7b2e8 Mon Sep 17 00:00:00 2001
From: Lu Baolu <baolu.lu@linux.intel.com>
Date: Fri, 28 Aug 2020 08:06:15 +0800
Subject: [PATCH 1021/1341] iommu/vt-d: Serialize IOMMU GCMD register
 modifications

The VT-d spec requires (10.4.4 Global Command Register, GCMD_REG General
Description) that:

If multiple control fields in this register need to be modified, software
must serialize the modifications through multiple writes to this register.

However, in irq_remapping.c, modifications of IRE and CFI are done in one
write. We need to do two separate writes with STS checking after each. It
also checks the status register before writing command register to avoid
unnecessary register write.

Fixes: af8d102f999a4 ("x86/intel/irq_remapping: Clean up x2apic opt-out security warning mess")
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Link: https://lore.kernel.org/r/20200828000615.8281-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/intel/irq_remapping.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 23583b0e66a5e..8f4ce72570ce3 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -508,12 +508,18 @@ static void iommu_enable_irq_remapping(struct intel_iommu *iommu)
 
 	/* Enable interrupt-remapping */
 	iommu->gcmd |= DMA_GCMD_IRE;
-	iommu->gcmd &= ~DMA_GCMD_CFI;  /* Block compatibility-format MSIs */
 	writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG);
-
 	IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG,
 		      readl, (sts & DMA_GSTS_IRES), sts);
 
+	/* Block compatibility-format MSIs */
+	if (sts & DMA_GSTS_CFIS) {
+		iommu->gcmd &= ~DMA_GCMD_CFI;
+		writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG);
+		IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG,
+			      readl, !(sts & DMA_GSTS_CFIS), sts);
+	}
+
 	/*
 	 * With CFI clear in the Global Command register, we should be
 	 * protected from dangerous (i.e. compatibility) interrupts
-- 
GitLab


From 2d33b7d631d9dc81c78bb71368645cf7f0e68cb1 Mon Sep 17 00:00:00 2001
From: Lu Baolu <baolu.lu@linux.intel.com>
Date: Thu, 3 Sep 2020 14:51:32 +0800
Subject: [PATCH 1022/1341] iommu/vt-d: Fix NULL pointer dereference in
 dev_iommu_priv_set()

The dev_iommu_priv_set() must be called after probe_device(). This fixes
a NULL pointer deference bug when booting a system with kernel cmdline
"intel_iommu=on,igfx_off", where the dev_iommu_priv_set() is abused.

The following stacktrace was produced:

 Command line: BOOT_IMAGE=/isolinux/bzImage console=tty1 intel_iommu=on,igfx_off
 ...
 DMAR: Host address width 39
 DMAR: DRHD base: 0x000000fed90000 flags: 0x0
 DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap 1c0000c40660462 ecap 19e2ff0505e
 DMAR: DRHD base: 0x000000fed91000 flags: 0x1
 DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap d2008c40660462 ecap f050da
 DMAR: RMRR base: 0x0000009aa9f000 end: 0x0000009aabefff
 DMAR: RMRR base: 0x0000009d000000 end: 0x0000009f7fffff
 DMAR: No ATSR found
 BUG: kernel NULL pointer dereference, address: 0000000000000038
 #PF: supervisor write access in kernel mode
 #PF: error_code(0x0002) - not-present page
 PGD 0 P4D 0
 Oops: 0002 [#1] SMP PTI
 CPU: 1 PID: 1 Comm: swapper/0 Not tainted 5.9.0-devel+ #2
 Hardware name: LENOVO 20HGS0TW00/20HGS0TW00, BIOS N1WET46S (1.25s ) 03/30/2018
 RIP: 0010:intel_iommu_init+0xed0/0x1136
 Code: fe e9 61 02 00 00 bb f4 ff ff ff e9 57 02 00 00 48 63 d1 48 c1 e2 04 48
       03 50 20 48 8b 12 48 85 d2 74 0b 48 8b 92 d0 02 00 00 48 89 7a 38 ff c1
       e9 15 f5 ff ff 48 c7 c7 60 99 ac a7 49 c7 c7 a0
 RSP: 0000:ffff96d180073dd0 EFLAGS: 00010282
 RAX: ffff8c91037a7d20 RBX: 0000000000000000 RCX: 0000000000000000
 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffffffffff
 RBP: ffff96d180073e90 R08: 0000000000000001 R09: ffff8c91039fe3c0
 R10: 0000000000000226 R11: 0000000000000226 R12: 000000000000000b
 R13: ffff8c910367c650 R14: ffffffffa8426d60 R15: 0000000000000000
 FS:  0000000000000000(0000) GS:ffff8c9107480000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000038 CR3: 00000004b100a001 CR4: 00000000003706e0
 Call Trace:
  ? _raw_spin_unlock_irqrestore+0x1f/0x30
  ? call_rcu+0x10e/0x320
  ? trace_hardirqs_on+0x2c/0xd0
  ? rdinit_setup+0x2c/0x2c
  ? e820__memblock_setup+0x8b/0x8b
  pci_iommu_init+0x16/0x3f
  do_one_initcall+0x46/0x1e4
  kernel_init_freeable+0x169/0x1b2
  ? rest_init+0x9f/0x9f
  kernel_init+0xa/0x101
  ret_from_fork+0x22/0x30
 Modules linked in:
 CR2: 0000000000000038
 ---[ end trace 3653722a6f936f18 ]---

Fixes: 01b9d4e21148c ("iommu/vt-d: Use dev_iommu_priv_get/set()")
Reported-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Reported-by: Wendy Wang <wendy.wang@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Tested-by: Torsten Hilbrich <torsten.hilbrich@secunet.com>
Link: https://lore.kernel.org/linux-iommu/96717683-70be-7388-3d2f-61131070a96a@secunet.com/
Link: https://lore.kernel.org/r/20200903065132.16879-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/intel/iommu.c | 100 ++++++++++++++++++++----------------
 1 file changed, 55 insertions(+), 45 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index f8177c59d229a..acd537294c926 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -364,7 +364,6 @@ static int iommu_skip_te_disable;
 int intel_iommu_gfx_mapped;
 EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped);
 
-#define DUMMY_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-1))
 #define DEFER_DEVICE_DOMAIN_INFO ((struct device_domain_info *)(-2))
 struct device_domain_info *get_domain_info(struct device *dev)
 {
@@ -374,8 +373,7 @@ struct device_domain_info *get_domain_info(struct device *dev)
 		return NULL;
 
 	info = dev_iommu_priv_get(dev);
-	if (unlikely(info == DUMMY_DEVICE_DOMAIN_INFO ||
-		     info == DEFER_DEVICE_DOMAIN_INFO))
+	if (unlikely(info == DEFER_DEVICE_DOMAIN_INFO))
 		return NULL;
 
 	return info;
@@ -742,11 +740,6 @@ struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
 	return &context[devfn];
 }
 
-static int iommu_dummy(struct device *dev)
-{
-	return dev_iommu_priv_get(dev) == DUMMY_DEVICE_DOMAIN_INFO;
-}
-
 static bool attach_deferred(struct device *dev)
 {
 	return dev_iommu_priv_get(dev) == DEFER_DEVICE_DOMAIN_INFO;
@@ -779,6 +772,53 @@ is_downstream_to_pci_bridge(struct device *dev, struct device *bridge)
 	return false;
 }
 
+static bool quirk_ioat_snb_local_iommu(struct pci_dev *pdev)
+{
+	struct dmar_drhd_unit *drhd;
+	u32 vtbar;
+	int rc;
+
+	/* We know that this device on this chipset has its own IOMMU.
+	 * If we find it under a different IOMMU, then the BIOS is lying
+	 * to us. Hope that the IOMMU for this device is actually
+	 * disabled, and it needs no translation...
+	 */
+	rc = pci_bus_read_config_dword(pdev->bus, PCI_DEVFN(0, 0), 0xb0, &vtbar);
+	if (rc) {
+		/* "can't" happen */
+		dev_info(&pdev->dev, "failed to run vt-d quirk\n");
+		return false;
+	}
+	vtbar &= 0xffff0000;
+
+	/* we know that the this iommu should be at offset 0xa000 from vtbar */
+	drhd = dmar_find_matched_drhd_unit(pdev);
+	if (!drhd || drhd->reg_base_addr - vtbar != 0xa000) {
+		pr_warn_once(FW_BUG "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n");
+		add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
+		return true;
+	}
+
+	return false;
+}
+
+static bool iommu_is_dummy(struct intel_iommu *iommu, struct device *dev)
+{
+	if (!iommu || iommu->drhd->ignored)
+		return true;
+
+	if (dev_is_pci(dev)) {
+		struct pci_dev *pdev = to_pci_dev(dev);
+
+		if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
+		    pdev->device == PCI_DEVICE_ID_INTEL_IOAT_SNB &&
+		    quirk_ioat_snb_local_iommu(pdev))
+			return true;
+	}
+
+	return false;
+}
+
 struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn)
 {
 	struct dmar_drhd_unit *drhd = NULL;
@@ -788,7 +828,7 @@ struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn)
 	u16 segment = 0;
 	int i;
 
-	if (!dev || iommu_dummy(dev))
+	if (!dev)
 		return NULL;
 
 	if (dev_is_pci(dev)) {
@@ -805,7 +845,7 @@ struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn)
 		dev = &ACPI_COMPANION(dev)->dev;
 
 	rcu_read_lock();
-	for_each_active_iommu(iommu, drhd) {
+	for_each_iommu(iommu, drhd) {
 		if (pdev && segment != drhd->segment)
 			continue;
 
@@ -841,6 +881,9 @@ struct intel_iommu *device_to_iommu(struct device *dev, u8 *bus, u8 *devfn)
 	}
 	iommu = NULL;
  out:
+	if (iommu_is_dummy(iommu, dev))
+		iommu = NULL;
+
 	rcu_read_unlock();
 
 	return iommu;
@@ -2447,7 +2490,7 @@ struct dmar_domain *find_domain(struct device *dev)
 {
 	struct device_domain_info *info;
 
-	if (unlikely(attach_deferred(dev) || iommu_dummy(dev)))
+	if (unlikely(attach_deferred(dev)))
 		return NULL;
 
 	/* No lock here, assumes no domain exit in normal case */
@@ -3989,35 +4032,6 @@ static void __init iommu_exit_mempool(void)
 	iova_cache_put();
 }
 
-static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev)
-{
-	struct dmar_drhd_unit *drhd;
-	u32 vtbar;
-	int rc;
-
-	/* We know that this device on this chipset has its own IOMMU.
-	 * If we find it under a different IOMMU, then the BIOS is lying
-	 * to us. Hope that the IOMMU for this device is actually
-	 * disabled, and it needs no translation...
-	 */
-	rc = pci_bus_read_config_dword(pdev->bus, PCI_DEVFN(0, 0), 0xb0, &vtbar);
-	if (rc) {
-		/* "can't" happen */
-		dev_info(&pdev->dev, "failed to run vt-d quirk\n");
-		return;
-	}
-	vtbar &= 0xffff0000;
-
-	/* we know that the this iommu should be at offset 0xa000 from vtbar */
-	drhd = dmar_find_matched_drhd_unit(pdev);
-	if (!drhd || drhd->reg_base_addr - vtbar != 0xa000) {
-		pr_warn_once(FW_BUG "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n");
-		add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK);
-		dev_iommu_priv_set(&pdev->dev, DUMMY_DEVICE_DOMAIN_INFO);
-	}
-}
-DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu);
-
 static void __init init_no_remapping_devices(void)
 {
 	struct dmar_drhd_unit *drhd;
@@ -4049,12 +4063,8 @@ static void __init init_no_remapping_devices(void)
 		/* This IOMMU has *only* gfx devices. Either bypass it or
 		   set the gfx_mapped flag, as appropriate */
 		drhd->gfx_dedicated = 1;
-		if (!dmar_map_gfx) {
+		if (!dmar_map_gfx)
 			drhd->ignored = 1;
-			for_each_active_dev_scope(drhd->devices,
-						  drhd->devices_cnt, i, dev)
-				dev_iommu_priv_set(dev, DUMMY_DEVICE_DOMAIN_INFO);
-		}
 	}
 }
 
-- 
GitLab


From 30d24faba0532d6972df79a1bf060601994b5873 Mon Sep 17 00:00:00 2001
From: Tony Lindgren <tony@atomide.com>
Date: Mon, 6 Jul 2020 11:33:38 -0700
Subject: [PATCH 1023/1341] thermal: ti-soc-thermal: Fix bogus thermal
 shutdowns for omap4430

We can sometimes get bogus thermal shutdowns on omap4430 at least with
droid4 running idle with a battery charger connected:

thermal thermal_zone0: critical temperature reached (143 C), shutting down

Dumping out the register values shows we can occasionally get a 0x7f value
that is outside the TRM listed values in the ADC conversion table. And then
we get a normal value when reading again after that. Reading the register
multiple times does not seem help avoiding the bogus values as they stay
until the next sample is ready.

Looking at the TRM chapter "18.4.10.2.3 ADC Codes Versus Temperature", we
should have values from 13 to 107 listed with a total of 95 values. But
looking at the omap4430_adc_to_temp array, the values are off, and the
end values are missing. And it seems that the 4430 ADC table is similar
to omap3630 rather than omap4460.

Let's fix the issue by using values based on the omap3630 table and just
ignoring invalid values. Compared to the 4430 TRM, the omap3630 table has
the missing values added while the TRM table only shows every second
value.

Note that sometimes the ADC register values within the valid table can
also be way off for about 1 out of 10 values. But it seems that those
just show about 25 C too low values rather than too high values. So those
do not cause a bogus thermal shutdown.

Fixes: 1a31270e54d7 ("staging: omap-thermal: add OMAP4 data structures")
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Sebastian Reichel <sebastian.reichel@collabora.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200706183338.25622-1-tony@atomide.com
---
 .../ti-soc-thermal/omap4-thermal-data.c       | 23 ++++++++++---------
 .../thermal/ti-soc-thermal/omap4xxx-bandgap.h | 10 +++++---
 2 files changed, 19 insertions(+), 14 deletions(-)

diff --git a/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c b/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c
index 63b02bfb2adf6..fdb8a495ab69a 100644
--- a/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c
+++ b/drivers/thermal/ti-soc-thermal/omap4-thermal-data.c
@@ -37,20 +37,21 @@ static struct temp_sensor_data omap4430_mpu_temp_sensor_data = {
 
 /*
  * Temperature values in milli degree celsius
- * ADC code values from 530 to 923
+ * ADC code values from 13 to 107, see TRM
+ * "18.4.10.2.3 ADC Codes Versus Temperature".
  */
 static const int
 omap4430_adc_to_temp[OMAP4430_ADC_END_VALUE - OMAP4430_ADC_START_VALUE + 1] = {
-	-38000, -35000, -34000, -32000, -30000, -28000, -26000, -24000, -22000,
-	-20000, -18000, -17000, -15000, -13000, -12000, -10000, -8000, -6000,
-	-5000, -3000, -1000, 0, 2000, 3000, 5000, 6000, 8000, 10000, 12000,
-	13000, 15000, 17000, 19000, 21000, 23000, 25000, 27000, 28000, 30000,
-	32000, 33000, 35000, 37000, 38000, 40000, 42000, 43000, 45000, 47000,
-	48000, 50000, 52000, 53000, 55000, 57000, 58000, 60000, 62000, 64000,
-	66000, 68000, 70000, 71000, 73000, 75000, 77000, 78000, 80000, 82000,
-	83000, 85000, 87000, 88000, 90000, 92000, 93000, 95000, 97000, 98000,
-	100000, 102000, 103000, 105000, 107000, 109000, 111000, 113000, 115000,
-	117000, 118000, 120000, 122000, 123000,
+	-40000, -38000, -35000, -34000, -32000, -30000, -28000, -26000, -24000,
+	-22000,	-20000, -18500, -17000, -15000, -13500, -12000, -10000, -8000,
+	-6500, -5000, -3500, -1500, 0, 2000, 3500, 5000, 6500, 8500, 10000,
+	12000, 13500, 15000, 17000, 19000, 21000, 23000, 25000, 27000, 28500,
+	30000, 32000, 33500, 35000, 37000, 38500, 40000, 42000, 43500, 45000,
+	47000, 48500, 50000, 52000, 53500, 55000, 57000, 58500, 60000, 62000,
+	64000, 66000, 68000, 70000, 71500, 73500, 75000, 77000, 78500, 80000,
+	82000, 83500, 85000, 87000, 88500, 90000, 92000, 93500, 95000, 97000,
+	98500, 100000, 102000, 103500, 105000, 107000, 109000, 111000, 113000,
+	115000, 117000, 118500, 120000, 122000, 123500, 125000,
 };
 
 /* OMAP4430 data */
diff --git a/drivers/thermal/ti-soc-thermal/omap4xxx-bandgap.h b/drivers/thermal/ti-soc-thermal/omap4xxx-bandgap.h
index a453ff8eb313e..9a3955c3853ba 100644
--- a/drivers/thermal/ti-soc-thermal/omap4xxx-bandgap.h
+++ b/drivers/thermal/ti-soc-thermal/omap4xxx-bandgap.h
@@ -53,9 +53,13 @@
  * and thresholds for OMAP4430.
  */
 
-/* ADC conversion table limits */
-#define OMAP4430_ADC_START_VALUE			0
-#define OMAP4430_ADC_END_VALUE				127
+/*
+ * ADC conversion table limits. Ignore values outside the TRM listed
+ * range to avoid bogus thermal shutdowns. See omap4430 TRM chapter
+ * "18.4.10.2.3 ADC Codes Versus Temperature".
+ */
+#define OMAP4430_ADC_START_VALUE			13
+#define OMAP4430_ADC_END_VALUE				107
 /* bandgap clock limits (no control on 4430) */
 #define OMAP4430_MAX_FREQ				32768
 #define OMAP4430_MIN_FREQ				32768
-- 
GitLab


From 3fb884ffe921c99483a84b0175f3c03f048e9069 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Wed, 2 Sep 2020 11:18:29 +0100
Subject: [PATCH 1024/1341] KVM: arm64: Do not try to map PUDs when they are
 folded into PMD

For the obscure cases where PMD and PUD are the same size
(64kB pages with 42bit VA, for example, which results in only
two levels of page tables), we can't map anything as a PUD,
because there is... erm... no PUD to speak of. Everything is
either a PMD or a PTE.

So let's only try and map a PUD when its size is different from
that of a PMD.

Cc: stable@vger.kernel.org
Fixes: b8e0ba7c8bea ("KVM: arm64: Add support for creating PUD hugepages at stage 2")
Reported-by: Gavin Shan <gshan@redhat.com>
Reported-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Tested-by: Gavin Shan <gshan@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/mmu.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 0121ef2c7c8d2..16b8660ddbccd 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1964,7 +1964,12 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 		(fault_status == FSC_PERM &&
 		 stage2_is_exec(mmu, fault_ipa, vma_pagesize));
 
-	if (vma_pagesize == PUD_SIZE) {
+	/*
+	 * If PUD_SIZE == PMD_SIZE, there is no real PUD level, and
+	 * all we have is a 2-level page table. Trying to map a PUD in
+	 * this case would be fatally wrong.
+	 */
+	if (PUD_SIZE != PMD_SIZE && vma_pagesize == PUD_SIZE) {
 		pud_t new_pud = kvm_pfn_pud(pfn, mem_type);
 
 		new_pud = kvm_pud_mkhuge(new_pud);
-- 
GitLab


From 0ffdab6f2dea9e23ec33230de24e492ff0b186d9 Mon Sep 17 00:00:00 2001
From: Veera Vegivada <vvegivad@codeaurora.org>
Date: Wed, 29 Jul 2020 09:52:51 -0700
Subject: [PATCH 1025/1341] thermal: qcom-spmi-temp-alarm: Don't suppress
 negative temp

Currently driver is suppressing the negative temperature
readings from the vadc. Consumers of the thermal zones need
to read the negative temperature too. Don't suppress the
readings.

Fixes: c610afaa21d3c6e ("thermal: Add QPNP PMIC temperature alarm driver")
Signed-off-by: Veera Vegivada <vvegivad@codeaurora.org>
Signed-off-by: Guru Das Srinagesh <gurus@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/944856eb819081268fab783236a916257de120e4.1596040416.git.gurus@codeaurora.org
---
 drivers/thermal/qcom/qcom-spmi-temp-alarm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/qcom/qcom-spmi-temp-alarm.c b/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
index bf7bae42c141c..6dc879fea9c8a 100644
--- a/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
+++ b/drivers/thermal/qcom/qcom-spmi-temp-alarm.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0-only
 /*
- * Copyright (c) 2011-2015, 2017, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2011-2015, 2017, 2020, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/bitops.h>
@@ -191,7 +191,7 @@ static int qpnp_tm_get_temp(void *data, int *temp)
 		chip->temp = mili_celsius;
 	}
 
-	*temp = chip->temp < 0 ? 0 : chip->temp;
+	*temp = chip->temp;
 
 	return 0;
 }
-- 
GitLab


From a5f785ce608cafc444cdf047d1791d5ad97943ba Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@gmail.com>
Date: Tue, 18 Aug 2020 02:58:54 +0300
Subject: [PATCH 1026/1341] thermal: core: Fix use-after-free in
 thermal_zone_device_unregister()

The user-after-free bug in thermal_zone_device_unregister() is reported by
KASAN. It happens because struct thermal_zone_device is released during of
device_unregister() invocation, and hence the "tz" variable shouldn't be
touched by thermal_notify_tz_delete(tz->id).

Fixes: 55cdf0a283b8 ("thermal: core: Add notifications call in the framework")
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20200817235854.26816-1-digetx@gmail.com
---
 drivers/thermal/thermal_core.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 72bf159bceccd..a6616e530a84d 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1516,7 +1516,7 @@ EXPORT_SYMBOL_GPL(thermal_zone_device_register);
  */
 void thermal_zone_device_unregister(struct thermal_zone_device *tz)
 {
-	int i;
+	int i, tz_id;
 	const struct thermal_zone_params *tzp;
 	struct thermal_cooling_device *cdev;
 	struct thermal_zone_device *pos = NULL;
@@ -1525,6 +1525,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
 		return;
 
 	tzp = tz->tzp;
+	tz_id = tz->id;
 
 	mutex_lock(&thermal_list_lock);
 	list_for_each_entry(pos, &thermal_tz_list, node)
@@ -1567,7 +1568,7 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz)
 	mutex_destroy(&tz->lock);
 	device_unregister(&tz->device);
 
-	thermal_notify_tz_delete(tz->id);
+	thermal_notify_tz_delete(tz_id);
 }
 EXPORT_SYMBOL_GPL(thermal_zone_device_unregister);
 
-- 
GitLab


From 26e495f341075c09023ba16dee9a7f37a021e745 Mon Sep 17 00:00:00 2001
From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Date: Thu, 3 Sep 2020 09:38:21 +0000
Subject: [PATCH 1027/1341] iommu/amd: Restore IRTE.RemapEn bit after
 programming IRTE

Currently, the RemapEn (valid) bit is accidentally cleared when
programming IRTE w/ guestMode=0. It should be restored to
the prior state.

Fixes: b9fc6b56f478 ("iommu/amd: Implements irq_set_vcpu_affinity() hook to setup vapic mode for pass-through devices")
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Link: https://lore.kernel.org/r/20200903093822.52012-2-suravee.suthikulpanit@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/amd/iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index ba9f3dbc5b947..967f4e96d1eb9 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3850,6 +3850,7 @@ int amd_iommu_deactivate_guest_mode(void *data)
 	struct amd_ir_data *ir_data = (struct amd_ir_data *)data;
 	struct irte_ga *entry = (struct irte_ga *) ir_data->entry;
 	struct irq_cfg *cfg = ir_data->cfg;
+	u64 valid = entry->lo.fields_remap.valid;
 
 	if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) ||
 	    !entry || !entry->lo.fields_vapic.guest_mode)
@@ -3858,6 +3859,7 @@ int amd_iommu_deactivate_guest_mode(void *data)
 	entry->lo.val = 0;
 	entry->hi.val = 0;
 
+	entry->lo.fields_remap.valid       = valid;
 	entry->lo.fields_remap.dm          = apic->irq_dest_mode;
 	entry->lo.fields_remap.int_type    = apic->irq_delivery_mode;
 	entry->hi.fields.vector            = cfg->vector;
-- 
GitLab


From e52d58d54a321d4fe9d0ecdabe4f8774449f0d6e Mon Sep 17 00:00:00 2001
From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Date: Thu, 3 Sep 2020 09:38:22 +0000
Subject: [PATCH 1028/1341] iommu/amd: Use cmpxchg_double() when updating
 128-bit IRTE

When using 128-bit interrupt-remapping table entry (IRTE) (a.k.a GA mode),
current driver disables interrupt remapping when it updates the IRTE
so that the upper and lower 64-bit values can be updated safely.

However, this creates a small window, where the interrupt could
arrive and result in IO_PAGE_FAULT (for interrupt) as shown below.

  IOMMU Driver            Device IRQ
  ============            ===========
  irte.RemapEn=0
       ...
   change IRTE            IRQ from device ==> IO_PAGE_FAULT !!
       ...
  irte.RemapEn=1

This scenario has been observed when changing irq affinity on a system
running I/O-intensive workload, in which the destination APIC ID
in the IRTE is updated.

Instead, use cmpxchg_double() to update the 128-bit IRTE at once without
disabling the interrupt remapping. However, this means several features,
which require GA (128-bit IRTE) support will also be affected if cmpxchg16b
is not supported (which is unprecedented for AMD processors w/ IOMMU).

Fixes: 880ac60e2538 ("iommu/amd: Introduce interrupt remapping ops structure")
Reported-by: Sean Osborne <sean.m.osborne@oracle.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Tested-by: Erik Rockstrom <erik.rockstrom@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Link: https://lore.kernel.org/r/20200903093822.52012-3-suravee.suthikulpanit@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/amd/Kconfig |  2 +-
 drivers/iommu/amd/init.c  | 21 +++++++++++++++++++--
 drivers/iommu/amd/iommu.c | 17 +++++++++++++----
 3 files changed, 33 insertions(+), 7 deletions(-)

diff --git a/drivers/iommu/amd/Kconfig b/drivers/iommu/amd/Kconfig
index 1f061d91e0b84..626b97d0dd21a 100644
--- a/drivers/iommu/amd/Kconfig
+++ b/drivers/iommu/amd/Kconfig
@@ -10,7 +10,7 @@ config AMD_IOMMU
 	select IOMMU_API
 	select IOMMU_IOVA
 	select IOMMU_DMA
-	depends on X86_64 && PCI && ACPI
+	depends on X86_64 && PCI && ACPI && HAVE_CMPXCHG_DOUBLE
 	help
 	  With this option you can enable support for AMD IOMMU hardware in
 	  your system. An IOMMU is a hardware component which provides
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index c652f16eb702a..445a08d23fedc 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -1511,7 +1511,14 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
 			iommu->mmio_phys_end = MMIO_REG_END_OFFSET;
 		else
 			iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET;
-		if (((h->efr_attr & (0x1 << IOMMU_FEAT_GASUP_SHIFT)) == 0))
+
+		/*
+		 * Note: GA (128-bit IRTE) mode requires cmpxchg16b supports.
+		 * GAM also requires GA mode. Therefore, we need to
+		 * check cmpxchg16b support before enabling it.
+		 */
+		if (!boot_cpu_has(X86_FEATURE_CX16) ||
+		    ((h->efr_attr & (0x1 << IOMMU_FEAT_GASUP_SHIFT)) == 0))
 			amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
 		break;
 	case 0x11:
@@ -1520,8 +1527,18 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
 			iommu->mmio_phys_end = MMIO_REG_END_OFFSET;
 		else
 			iommu->mmio_phys_end = MMIO_CNTR_CONF_OFFSET;
-		if (((h->efr_reg & (0x1 << IOMMU_EFR_GASUP_SHIFT)) == 0))
+
+		/*
+		 * Note: GA (128-bit IRTE) mode requires cmpxchg16b supports.
+		 * XT, GAM also requires GA mode. Therefore, we need to
+		 * check cmpxchg16b support before enabling them.
+		 */
+		if (!boot_cpu_has(X86_FEATURE_CX16) ||
+		    ((h->efr_reg & (0x1 << IOMMU_EFR_GASUP_SHIFT)) == 0)) {
 			amd_iommu_guest_ir = AMD_IOMMU_GUEST_IR_LEGACY;
+			break;
+		}
+
 		/*
 		 * Note: Since iommu_update_intcapxt() leverages
 		 * the IOMMU MMIO access to MSI capability block registers
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 967f4e96d1eb9..a382d7a73eaa3 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3292,6 +3292,7 @@ static int alloc_irq_index(u16 devid, int count, bool align,
 static int modify_irte_ga(u16 devid, int index, struct irte_ga *irte,
 			  struct amd_ir_data *data)
 {
+	bool ret;
 	struct irq_remap_table *table;
 	struct amd_iommu *iommu;
 	unsigned long flags;
@@ -3309,10 +3310,18 @@ static int modify_irte_ga(u16 devid, int index, struct irte_ga *irte,
 
 	entry = (struct irte_ga *)table->table;
 	entry = &entry[index];
-	entry->lo.fields_remap.valid = 0;
-	entry->hi.val = irte->hi.val;
-	entry->lo.val = irte->lo.val;
-	entry->lo.fields_remap.valid = 1;
+
+	ret = cmpxchg_double(&entry->lo.val, &entry->hi.val,
+			     entry->lo.val, entry->hi.val,
+			     irte->lo.val, irte->hi.val);
+	/*
+	 * We use cmpxchg16 to atomically update the 128-bit IRTE,
+	 * and it cannot be updated by the hardware or other processors
+	 * behind us, so the return value of cmpxchg16 should be the
+	 * same as the old value.
+	 */
+	WARN_ON(!ret);
+
 	if (data)
 		data->ref = entry;
 
-- 
GitLab


From 376426b1a953762b00df887e28d29e44ab4ff723 Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Wed, 2 Sep 2020 11:53:03 +0100
Subject: [PATCH 1029/1341] KVM: arm64: Fix address truncation in traces

Owing to their ARMv7 origins, the trace events are truncating most
address values to 32bits. That's not really helpful.

Expand the printing of such values to their full glory.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/kvm/trace_arm.h         | 16 ++++++++--------
 arch/arm64/kvm/trace_handle_exit.h |  6 +++---
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/arch/arm64/kvm/trace_arm.h b/arch/arm64/kvm/trace_arm.h
index 4691053c5ee42..ff0444352bba3 100644
--- a/arch/arm64/kvm/trace_arm.h
+++ b/arch/arm64/kvm/trace_arm.h
@@ -23,7 +23,7 @@ TRACE_EVENT(kvm_entry,
 		__entry->vcpu_pc		= vcpu_pc;
 	),
 
-	TP_printk("PC: 0x%08lx", __entry->vcpu_pc)
+	TP_printk("PC: 0x%016lx", __entry->vcpu_pc)
 );
 
 TRACE_EVENT(kvm_exit,
@@ -42,7 +42,7 @@ TRACE_EVENT(kvm_exit,
 		__entry->vcpu_pc		= vcpu_pc;
 	),
 
-	TP_printk("%s: HSR_EC: 0x%04x (%s), PC: 0x%08lx",
+	TP_printk("%s: HSR_EC: 0x%04x (%s), PC: 0x%016lx",
 		  __print_symbolic(__entry->ret, kvm_arm_exception_type),
 		  __entry->esr_ec,
 		  __print_symbolic(__entry->esr_ec, kvm_arm_exception_class),
@@ -69,7 +69,7 @@ TRACE_EVENT(kvm_guest_fault,
 		__entry->ipa			= ipa;
 	),
 
-	TP_printk("ipa %#llx, hsr %#08lx, hxfar %#08lx, pc %#08lx",
+	TP_printk("ipa %#llx, hsr %#08lx, hxfar %#08lx, pc %#016lx",
 		  __entry->ipa, __entry->hsr,
 		  __entry->hxfar, __entry->vcpu_pc)
 );
@@ -131,7 +131,7 @@ TRACE_EVENT(kvm_mmio_emulate,
 		__entry->cpsr			= cpsr;
 	),
 
-	TP_printk("Emulate MMIO at: 0x%08lx (instr: %08lx, cpsr: %08lx)",
+	TP_printk("Emulate MMIO at: 0x%016lx (instr: %08lx, cpsr: %08lx)",
 		  __entry->vcpu_pc, __entry->instr, __entry->cpsr)
 );
 
@@ -149,7 +149,7 @@ TRACE_EVENT(kvm_unmap_hva_range,
 		__entry->end		= end;
 	),
 
-	TP_printk("mmu notifier unmap range: %#08lx -- %#08lx",
+	TP_printk("mmu notifier unmap range: %#016lx -- %#016lx",
 		  __entry->start, __entry->end)
 );
 
@@ -165,7 +165,7 @@ TRACE_EVENT(kvm_set_spte_hva,
 		__entry->hva		= hva;
 	),
 
-	TP_printk("mmu notifier set pte hva: %#08lx", __entry->hva)
+	TP_printk("mmu notifier set pte hva: %#016lx", __entry->hva)
 );
 
 TRACE_EVENT(kvm_age_hva,
@@ -182,7 +182,7 @@ TRACE_EVENT(kvm_age_hva,
 		__entry->end		= end;
 	),
 
-	TP_printk("mmu notifier age hva: %#08lx -- %#08lx",
+	TP_printk("mmu notifier age hva: %#016lx -- %#016lx",
 		  __entry->start, __entry->end)
 );
 
@@ -198,7 +198,7 @@ TRACE_EVENT(kvm_test_age_hva,
 		__entry->hva		= hva;
 	),
 
-	TP_printk("mmu notifier test age hva: %#08lx", __entry->hva)
+	TP_printk("mmu notifier test age hva: %#016lx", __entry->hva)
 );
 
 TRACE_EVENT(kvm_set_way_flush,
diff --git a/arch/arm64/kvm/trace_handle_exit.h b/arch/arm64/kvm/trace_handle_exit.h
index 2c56d1e0f5bd5..8d78acc4fba7e 100644
--- a/arch/arm64/kvm/trace_handle_exit.h
+++ b/arch/arm64/kvm/trace_handle_exit.h
@@ -22,7 +22,7 @@ TRACE_EVENT(kvm_wfx_arm64,
 		__entry->is_wfe  = is_wfe;
 	),
 
-	TP_printk("guest executed wf%c at: 0x%08lx",
+	TP_printk("guest executed wf%c at: 0x%016lx",
 		  __entry->is_wfe ? 'e' : 'i', __entry->vcpu_pc)
 );
 
@@ -42,7 +42,7 @@ TRACE_EVENT(kvm_hvc_arm64,
 		__entry->imm = imm;
 	),
 
-	TP_printk("HVC at 0x%08lx (r0: 0x%08lx, imm: 0x%lx)",
+	TP_printk("HVC at 0x%016lx (r0: 0x%016lx, imm: 0x%lx)",
 		  __entry->vcpu_pc, __entry->r0, __entry->imm)
 );
 
@@ -135,7 +135,7 @@ TRACE_EVENT(trap_reg,
 		__entry->write_value = write_value;
 	),
 
-	TP_printk("%s %s reg %d (0x%08llx)", __entry->fn,  __entry->is_write?"write to":"read from", __entry->reg, __entry->write_value)
+	TP_printk("%s %s reg %d (0x%016llx)", __entry->fn,  __entry->is_write?"write to":"read from", __entry->reg, __entry->write_value)
 );
 
 TRACE_EVENT(kvm_handle_sys_reg,
-- 
GitLab


From 7b75cd5128421c673153efb1236705696a1a9812 Mon Sep 17 00:00:00 2001
From: Alexandru Elisei <alexandru.elisei@arm.com>
Date: Tue, 1 Sep 2020 14:33:56 +0100
Subject: [PATCH 1030/1341] KVM: arm64: Update page shift if stage 2 block
 mapping not supported

Commit 196f878a7ac2e (" KVM: arm/arm64: Signal SIGBUS when stage2 discovers
hwpoison memory") modifies user_mem_abort() to send a SIGBUS signal when
the fault IPA maps to a hwpoisoned page. Commit 1559b7583ff6 ("KVM:
arm/arm64: Re-check VMA on detecting a poisoned page") changed
kvm_send_hwpoison_signal() to use the page shift instead of the VMA because
at that point the code had already released the mmap lock, which means
userspace could have modified the VMA.

If userspace uses hugetlbfs for the VM memory, user_mem_abort() tries to
map the guest fault IPA using block mappings in stage 2. That is not always
possible, if, for example, userspace uses dirty page logging for the VM.
Update the page shift appropriately in those cases when we downgrade the
stage 2 entry from a block mapping to a page.

Fixes: 1559b7583ff6 ("KVM: arm/arm64: Re-check VMA on detecting a poisoned page")
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Link: https://lore.kernel.org/r/20200901133357.52640-2-alexandru.elisei@arm.com
---
 arch/arm64/kvm/mmu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 16b8660ddbccd..f58d657a898df 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1871,6 +1871,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
 	    !fault_supports_stage2_huge_mapping(memslot, hva, vma_pagesize)) {
 		force_pte = true;
 		vma_pagesize = PAGE_SIZE;
+		vma_shift = PAGE_SHIFT;
 	}
 
 	/*
-- 
GitLab


From 7cad554887f1c5fd77e57e6bf4be38370c2160cb Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@suse.de>
Date: Mon, 24 Aug 2020 12:54:14 +0200
Subject: [PATCH 1031/1341] iommu/amd: Do not force direct mapping when SME is
 active

Do not force devices supporting IOMMUv2 to be direct mapped when memory
encryption is active. This might cause them to be unusable because their
DMA mask does not include the encryption bit.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200824105415.21000-2-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/amd/iommu.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index a382d7a73eaa3..07ae8b93887e5 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2659,7 +2659,12 @@ static int amd_iommu_def_domain_type(struct device *dev)
 	if (!dev_data)
 		return 0;
 
-	if (dev_data->iommu_v2)
+	/*
+	 * Do not identity map IOMMUv2 capable devices when memory encryption is
+	 * active, because some of those devices (AMD GPUs) don't have the
+	 * encryption bit in their DMA-mask and require remapping.
+	 */
+	if (!mem_encrypt_active() && dev_data->iommu_v2)
 		return IOMMU_DOMAIN_IDENTITY;
 
 	return 0;
-- 
GitLab


From 2822e582501b65707089b097e773e6fd70774841 Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@suse.de>
Date: Mon, 24 Aug 2020 12:54:15 +0200
Subject: [PATCH 1032/1341] iommu/amd: Do not use IOMMUv2 functionality when
 SME is active

When memory encryption is active the device is likely not in a direct
mapped domain. Forbid using IOMMUv2 functionality for now until finer
grained checks for this have been implemented.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200824105415.21000-3-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/amd/iommu_v2.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/iommu/amd/iommu_v2.c b/drivers/iommu/amd/iommu_v2.c
index c259108ab6dd7..0d175aed1d92f 100644
--- a/drivers/iommu/amd/iommu_v2.c
+++ b/drivers/iommu/amd/iommu_v2.c
@@ -737,6 +737,13 @@ int amd_iommu_init_device(struct pci_dev *pdev, int pasids)
 
 	might_sleep();
 
+	/*
+	 * When memory encryption is active the device is likely not in a
+	 * direct-mapped domain. Forbid using IOMMUv2 functionality for now.
+	 */
+	if (mem_encrypt_active())
+		return -ENODEV;
+
 	if (!amd_iommu_v2_supported())
 		return -ENODEV;
 
-- 
GitLab


From 29aaebbca4abc4cceb38738483051abefafb6950 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sat, 22 Aug 2020 17:02:09 +0100
Subject: [PATCH 1033/1341] iommu/vt-d: Handle 36bit addressing for x86-32

Beware that the address size for x86-32 may exceed unsigned long.

[    0.368971] UBSAN: shift-out-of-bounds in drivers/iommu/intel/iommu.c:128:14
[    0.369055] shift exponent 36 is too large for 32-bit type 'long unsigned int'

If we don't handle the wide addresses, the pages are mismapped and the
device read/writes go astray, detected as DMAR faults and leading to
device failure. The behaviour changed (from working to broken) in commit
fa954e683178 ("iommu/vt-d: Delegate the dma domain to upper layer"), but
the error looks older.

Fixes: fa954e683178 ("iommu/vt-d: Delegate the dma domain to upper layer")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Cc: James Sewart <jamessewart@arista.com>
Cc: Lu Baolu <baolu.lu@linux.intel.com>
Cc: Joerg Roedel <jroedel@suse.de>
Cc: <stable@vger.kernel.org> # v5.3+
Link: https://lore.kernel.org/r/20200822160209.28512-1-chris@chris-wilson.co.uk
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/intel/iommu.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index acd537294c926..87b17bac04c27 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -123,29 +123,29 @@ static inline unsigned int level_to_offset_bits(int level)
 	return (level - 1) * LEVEL_STRIDE;
 }
 
-static inline int pfn_level_offset(unsigned long pfn, int level)
+static inline int pfn_level_offset(u64 pfn, int level)
 {
 	return (pfn >> level_to_offset_bits(level)) & LEVEL_MASK;
 }
 
-static inline unsigned long level_mask(int level)
+static inline u64 level_mask(int level)
 {
-	return -1UL << level_to_offset_bits(level);
+	return -1ULL << level_to_offset_bits(level);
 }
 
-static inline unsigned long level_size(int level)
+static inline u64 level_size(int level)
 {
-	return 1UL << level_to_offset_bits(level);
+	return 1ULL << level_to_offset_bits(level);
 }
 
-static inline unsigned long align_to_level(unsigned long pfn, int level)
+static inline u64 align_to_level(u64 pfn, int level)
 {
 	return (pfn + level_size(level) - 1) & level_mask(level);
 }
 
 static inline unsigned long lvl_to_nr_pages(unsigned int lvl)
 {
-	return  1 << min_t(int, (lvl - 1) * LEVEL_STRIDE, MAX_AGAW_PFN_WIDTH);
+	return 1UL << min_t(int, (lvl - 1) * LEVEL_STRIDE, MAX_AGAW_PFN_WIDTH);
 }
 
 /* VT-d pages must always be _smaller_ than MM pages. Otherwise things
-- 
GitLab


From fc7f148feb8975784bd40e41fff875d33f698be8 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue, 18 Aug 2020 09:25:11 +0200
Subject: [PATCH 1034/1341] drm/virtio: drop virtio_gpu_output->enabled

Not needed, already tracked by drm_crtc_state->active.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20200818072511.6745-3-kraxel@redhat.com
(cherry picked from commit 1174c8a0f33c1e5c442ac40381fe124248c08b3a)
---
 drivers/gpu/drm/virtio/virtgpu_display.c | 4 ----
 drivers/gpu/drm/virtio/virtgpu_drv.h     | 1 -
 drivers/gpu/drm/virtio/virtgpu_plane.c   | 2 +-
 3 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index 97170998cd0e4..afd0f9200f908 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -97,9 +97,6 @@ static void virtio_gpu_crtc_mode_set_nofb(struct drm_crtc *crtc)
 static void virtio_gpu_crtc_atomic_enable(struct drm_crtc *crtc,
 					  struct drm_crtc_state *old_state)
 {
-	struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(crtc);
-
-	output->enabled = true;
 }
 
 static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc,
@@ -111,7 +108,6 @@ static void virtio_gpu_crtc_atomic_disable(struct drm_crtc *crtc,
 
 	virtio_gpu_cmd_set_scanout(vgdev, output->index, 0, 0, 0, 0, 0);
 	virtio_gpu_notify(vgdev);
-	output->enabled = false;
 }
 
 static int virtio_gpu_crtc_atomic_check(struct drm_crtc *crtc,
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 4ab1b0ba29253..fbc04272db4f0 100644
--- a/drivers/gpu/drm/virtio/virtgpu_drv.h
+++ b/drivers/gpu/drm/virtio/virtgpu_drv.h
@@ -137,7 +137,6 @@ struct virtio_gpu_output {
 	struct edid *edid;
 	int cur_x;
 	int cur_y;
-	bool enabled;
 	bool needs_modeset;
 };
 #define drm_crtc_to_virtio_gpu_output(x) \
diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c
index 65757409d9ed1..6a311cd934403 100644
--- a/drivers/gpu/drm/virtio/virtgpu_plane.c
+++ b/drivers/gpu/drm/virtio/virtgpu_plane.c
@@ -142,7 +142,7 @@ static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
 	if (WARN_ON(!output))
 		return;
 
-	if (!plane->state->fb || !output->enabled) {
+	if (!plane->state->fb || !output->crtc.state->active) {
 		DRM_DEBUG("nofb\n");
 		virtio_gpu_cmd_set_scanout(vgdev, output->index, 0,
 					   plane->state->src_w >> 16,
-- 
GitLab


From 2356bb4b8221d7dc8c7beb810418122ed90254c9 Mon Sep 17 00:00:00 2001
From: Vamshi K Sthambamkadi <vamshi.k.sthambamkadi@gmail.com>
Date: Fri, 28 Aug 2020 17:02:46 +0530
Subject: [PATCH 1035/1341] tracing/kprobes, x86/ptrace: Fix regs argument
 order for i386

On i386, the order of parameters passed on regs is eax,edx,and ecx
(as per regparm(3) calling conventions).

Change the mapping in regs_get_kernel_argument(), so that arg1=ax
arg2=dx, and arg3=cx.

Running the selftests testcase kprobes_args_use.tc shows the result
as passed.

Fixes: 3c88ee194c28 ("x86: ptrace: Add function argument access API")
Signed-off-by: Vamshi K Sthambamkadi <vamshi.k.sthambamkadi@gmail.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200828113242.GA1424@cosmos
---
 arch/x86/include/asm/ptrace.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/ptrace.h b/arch/x86/include/asm/ptrace.h
index 40aa69d04862e..d8324a2366961 100644
--- a/arch/x86/include/asm/ptrace.h
+++ b/arch/x86/include/asm/ptrace.h
@@ -327,8 +327,8 @@ static inline unsigned long regs_get_kernel_argument(struct pt_regs *regs,
 	static const unsigned int argument_offs[] = {
 #ifdef __i386__
 		offsetof(struct pt_regs, ax),
-		offsetof(struct pt_regs, cx),
 		offsetof(struct pt_regs, dx),
+		offsetof(struct pt_regs, cx),
 #define NR_REG_ARGUMENTS 3
 #else
 		offsetof(struct pt_regs, di),
-- 
GitLab


From 662a0221893a3d58aa72719671844264306f6e4b Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Wed, 2 Sep 2020 15:25:50 +0200
Subject: [PATCH 1036/1341] x86/entry: Fix AC assertion

The WARN added in commit 3c73b81a9164 ("x86/entry, selftests: Further
improve user entry sanity checks") unconditionally triggers on a IVB
machine because it does not support SMAP.

For !SMAP hardware the CLAC/STAC instructions are patched out and thus if
userspace sets AC, it is still have set after entry.

Fixes: 3c73b81a9164 ("x86/entry, selftests: Further improve user entry sanity checks")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200902133200.666781610@infradead.org
---
 arch/x86/include/asm/entry-common.h | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/entry-common.h b/arch/x86/include/asm/entry-common.h
index a8f9315b9eaef..6fe54b2813c13 100644
--- a/arch/x86/include/asm/entry-common.h
+++ b/arch/x86/include/asm/entry-common.h
@@ -18,8 +18,16 @@ static __always_inline void arch_check_user_regs(struct pt_regs *regs)
 		 * state, not the interrupt state as imagined by Xen.
 		 */
 		unsigned long flags = native_save_fl();
-		WARN_ON_ONCE(flags & (X86_EFLAGS_AC | X86_EFLAGS_DF |
-				      X86_EFLAGS_NT));
+		unsigned long mask = X86_EFLAGS_DF | X86_EFLAGS_NT;
+
+		/*
+		 * For !SMAP hardware we patch out CLAC on entry.
+		 */
+		if (boot_cpu_has(X86_FEATURE_SMAP) ||
+		    (IS_ENABLED(CONFIG_64_BIT) && boot_cpu_has(X86_FEATURE_XENPV)))
+			mask |= X86_EFLAGS_AC;
+
+		WARN_ON_ONCE(flags & mask);
 
 		/* We think we came from user mode. Make sure pt_regs agrees. */
 		WARN_ON_ONCE(!user_mode(regs));
-- 
GitLab


From d5c678aed5eddb944b8e7ce451b107b39245962d Mon Sep 17 00:00:00 2001
From: Andy Lutomirski <luto@kernel.org>
Date: Wed, 2 Sep 2020 15:25:51 +0200
Subject: [PATCH 1037/1341] x86/debug: Allow a single level of #DB recursion

Trying to clear DR7 around a #DB from usermode malfunctions if the tasks
schedules when delivering SIGTRAP.

Rather than trying to define a special no-recursion region, just allow a
single level of recursion.  The same mechanism is used for NMI, and it
hasn't caused any problems yet.

Fixes: 9f58fdde95c9 ("x86/db: Split out dr6/7 handling")
Reported-by: Kyle Huey <me@kylehuey.com>
Debugged-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/8b9bd05f187231df008d48cf818a6a311cbd5c98.1597882384.git.luto@kernel.org
Link: https://lore.kernel.org/r/20200902133200.726584153@infradead.org
---
 arch/x86/kernel/traps.c | 65 ++++++++++++++++++++---------------------
 1 file changed, 31 insertions(+), 34 deletions(-)

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index 1f66d2d1e998d..81a2fb711091c 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -729,20 +729,9 @@ static bool is_sysenter_singlestep(struct pt_regs *regs)
 #endif
 }
 
-static __always_inline void debug_enter(unsigned long *dr6, unsigned long *dr7)
+static __always_inline unsigned long debug_read_clear_dr6(void)
 {
-	/*
-	 * Disable breakpoints during exception handling; recursive exceptions
-	 * are exceedingly 'fun'.
-	 *
-	 * Since this function is NOKPROBE, and that also applies to
-	 * HW_BREAKPOINT_X, we can't hit a breakpoint before this (XXX except a
-	 * HW_BREAKPOINT_W on our stack)
-	 *
-	 * Entry text is excluded for HW_BP_X and cpu_entry_area, which
-	 * includes the entry stack is excluded for everything.
-	 */
-	*dr7 = local_db_save();
+	unsigned long dr6;
 
 	/*
 	 * The Intel SDM says:
@@ -755,15 +744,12 @@ static __always_inline void debug_enter(unsigned long *dr6, unsigned long *dr7)
 	 *
 	 * Keep it simple: clear DR6 immediately.
 	 */
-	get_debugreg(*dr6, 6);
+	get_debugreg(dr6, 6);
 	set_debugreg(0, 6);
 	/* Filter out all the reserved bits which are preset to 1 */
-	*dr6 &= ~DR6_RESERVED;
-}
+	dr6 &= ~DR6_RESERVED;
 
-static __always_inline void debug_exit(unsigned long dr7)
-{
-	local_db_restore(dr7);
+	return dr6;
 }
 
 /*
@@ -863,6 +849,18 @@ static void handle_debug(struct pt_regs *regs, unsigned long dr6, bool user)
 static __always_inline void exc_debug_kernel(struct pt_regs *regs,
 					     unsigned long dr6)
 {
+	/*
+	 * Disable breakpoints during exception handling; recursive exceptions
+	 * are exceedingly 'fun'.
+	 *
+	 * Since this function is NOKPROBE, and that also applies to
+	 * HW_BREAKPOINT_X, we can't hit a breakpoint before this (XXX except a
+	 * HW_BREAKPOINT_W on our stack)
+	 *
+	 * Entry text is excluded for HW_BP_X and cpu_entry_area, which
+	 * includes the entry stack is excluded for everything.
+	 */
+	unsigned long dr7 = local_db_save();
 	bool irq_state = idtentry_enter_nmi(regs);
 	instrumentation_begin();
 
@@ -883,6 +881,8 @@ static __always_inline void exc_debug_kernel(struct pt_regs *regs,
 
 	instrumentation_end();
 	idtentry_exit_nmi(regs, irq_state);
+
+	local_db_restore(dr7);
 }
 
 static __always_inline void exc_debug_user(struct pt_regs *regs,
@@ -894,6 +894,15 @@ static __always_inline void exc_debug_user(struct pt_regs *regs,
 	 */
 	WARN_ON_ONCE(!user_mode(regs));
 
+	/*
+	 * NB: We can't easily clear DR7 here because
+	 * idtentry_exit_to_usermode() can invoke ptrace, schedule, access
+	 * user memory, etc.  This means that a recursive #DB is possible.  If
+	 * this happens, that #DB will hit exc_debug_kernel() and clear DR7.
+	 * Since we're not on the IST stack right now, everything will be
+	 * fine.
+	 */
+
 	irqentry_enter_from_user_mode(regs);
 	instrumentation_begin();
 
@@ -907,36 +916,24 @@ static __always_inline void exc_debug_user(struct pt_regs *regs,
 /* IST stack entry */
 DEFINE_IDTENTRY_DEBUG(exc_debug)
 {
-	unsigned long dr6, dr7;
-
-	debug_enter(&dr6, &dr7);
-	exc_debug_kernel(regs, dr6);
-	debug_exit(dr7);
+	exc_debug_kernel(regs, debug_read_clear_dr6());
 }
 
 /* User entry, runs on regular task stack */
 DEFINE_IDTENTRY_DEBUG_USER(exc_debug)
 {
-	unsigned long dr6, dr7;
-
-	debug_enter(&dr6, &dr7);
-	exc_debug_user(regs, dr6);
-	debug_exit(dr7);
+	exc_debug_user(regs, debug_read_clear_dr6());
 }
 #else
 /* 32 bit does not have separate entry points. */
 DEFINE_IDTENTRY_RAW(exc_debug)
 {
-	unsigned long dr6, dr7;
-
-	debug_enter(&dr6, &dr7);
+	unsigned long dr6 = debug_read_clear_dr6();
 
 	if (user_mode(regs))
 		exc_debug_user(regs, dr6);
 	else
 		exc_debug_kernel(regs, dr6);
-
-	debug_exit(dr7);
 }
 #endif
 
-- 
GitLab


From 4facb95b7adaf77e2da73aafb9ba60996fe42a12 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Wed, 2 Sep 2020 01:50:54 +0200
Subject: [PATCH 1038/1341] x86/entry: Unbreak 32bit fast syscall

Andy reported that the syscall treacing for 32bit fast syscall fails:

# ./tools/testing/selftests/x86/ptrace_syscall_32
...
[RUN] SYSEMU
[FAIL] Initial args are wrong (nr=224, args=10 11 12 13 14 4289172732)
...
[RUN] SYSCALL
[FAIL] Initial args are wrong (nr=29, args=0 0 0 0 0 4289172732)

The eason is that the conversion to generic entry code moved the retrieval
of the sixth argument (EBP) after the point where the syscall entry work
runs, i.e. ptrace, seccomp, audit...

Unbreak it by providing a split up version of syscall_enter_from_user_mode().

- syscall_enter_from_user_mode_prepare() establishes state and enables
  interrupts

- syscall_enter_from_user_mode_work() runs the entry work

Replace the call to syscall_enter_from_user_mode() in the 32bit fast
syscall C-entry with the split functions and stick the EBP retrieval
between them.

Fixes: 27d6b4d14f5c ("x86/entry: Use generic syscall entry function")
Reported-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/87k0xdjbtt.fsf@nanos.tec.linutronix.de
---
 arch/x86/entry/common.c      | 29 +++++++++++++-------
 include/linux/entry-common.h | 51 +++++++++++++++++++++++++++++-------
 kernel/entry/common.c        | 35 ++++++++++++++++++++-----
 3 files changed, 91 insertions(+), 24 deletions(-)

diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index 48512c7944e7e..2f84c7ca74ea9 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -60,16 +60,10 @@ __visible noinstr void do_syscall_64(unsigned long nr, struct pt_regs *regs)
 #if defined(CONFIG_X86_32) || defined(CONFIG_IA32_EMULATION)
 static __always_inline unsigned int syscall_32_enter(struct pt_regs *regs)
 {
-	unsigned int nr = (unsigned int)regs->orig_ax;
-
 	if (IS_ENABLED(CONFIG_IA32_EMULATION))
 		current_thread_info()->status |= TS_COMPAT;
-	/*
-	 * Subtlety here: if ptrace pokes something larger than 2^32-1 into
-	 * orig_ax, the unsigned int return value truncates it.  This may
-	 * or may not be necessary, but it matches the old asm behavior.
-	 */
-	return (unsigned int)syscall_enter_from_user_mode(regs, nr);
+
+	return (unsigned int)regs->orig_ax;
 }
 
 /*
@@ -91,15 +85,29 @@ __visible noinstr void do_int80_syscall_32(struct pt_regs *regs)
 {
 	unsigned int nr = syscall_32_enter(regs);
 
+	/*
+	 * Subtlety here: if ptrace pokes something larger than 2^32-1 into
+	 * orig_ax, the unsigned int return value truncates it.  This may
+	 * or may not be necessary, but it matches the old asm behavior.
+	 */
+	nr = (unsigned int)syscall_enter_from_user_mode(regs, nr);
+
 	do_syscall_32_irqs_on(regs, nr);
 	syscall_exit_to_user_mode(regs);
 }
 
 static noinstr bool __do_fast_syscall_32(struct pt_regs *regs)
 {
-	unsigned int nr	= syscall_32_enter(regs);
+	unsigned int nr = syscall_32_enter(regs);
 	int res;
 
+	/*
+	 * This cannot use syscall_enter_from_user_mode() as it has to
+	 * fetch EBP before invoking any of the syscall entry work
+	 * functions.
+	 */
+	syscall_enter_from_user_mode_prepare(regs);
+
 	instrumentation_begin();
 	/* Fetch EBP from where the vDSO stashed it. */
 	if (IS_ENABLED(CONFIG_X86_64)) {
@@ -122,6 +130,9 @@ static noinstr bool __do_fast_syscall_32(struct pt_regs *regs)
 		return false;
 	}
 
+	/* The case truncates any ptrace induced syscall nr > 2^32 -1 */
+	nr = (unsigned int)syscall_enter_from_user_mode_work(regs, nr);
+
 	/* Now this is just like a normal syscall. */
 	do_syscall_32_irqs_on(regs, nr);
 	syscall_exit_to_user_mode(regs);
diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h
index efebbffcd5cc9..159c7476b11b4 100644
--- a/include/linux/entry-common.h
+++ b/include/linux/entry-common.h
@@ -110,15 +110,30 @@ static inline __must_check int arch_syscall_enter_tracehook(struct pt_regs *regs
 #endif
 
 /**
- * syscall_enter_from_user_mode - Check and handle work before invoking
- *				 a syscall
+ * syscall_enter_from_user_mode_prepare - Establish state and enable interrupts
  * @regs:	Pointer to currents pt_regs
- * @syscall:	The syscall number
  *
  * Invoked from architecture specific syscall entry code with interrupts
  * disabled. The calling code has to be non-instrumentable. When the
- * function returns all state is correct and the subsequent functions can be
- * instrumented.
+ * function returns all state is correct, interrupts are enabled and the
+ * subsequent functions can be instrumented.
+ *
+ * This handles lockdep, RCU (context tracking) and tracing state.
+ *
+ * This is invoked when there is extra architecture specific functionality
+ * to be done between establishing state and handling user mode entry work.
+ */
+void syscall_enter_from_user_mode_prepare(struct pt_regs *regs);
+
+/**
+ * syscall_enter_from_user_mode_work - Check and handle work before invoking
+ *				       a syscall
+ * @regs:	Pointer to currents pt_regs
+ * @syscall:	The syscall number
+ *
+ * Invoked from architecture specific syscall entry code with interrupts
+ * enabled after invoking syscall_enter_from_user_mode_prepare() and extra
+ * architecture specific work.
  *
  * Returns: The original or a modified syscall number
  *
@@ -127,12 +142,30 @@ static inline __must_check int arch_syscall_enter_tracehook(struct pt_regs *regs
  * syscall_set_return_value() first.  If neither of those are called and -1
  * is returned, then the syscall will fail with ENOSYS.
  *
- * The following functionality is handled here:
+ * It handles the following work items:
  *
- *  1) Establish state (lockdep, RCU (context tracking), tracing)
- *  2) TIF flag dependent invocations of arch_syscall_enter_tracehook(),
+ *  1) TIF flag dependent invocations of arch_syscall_enter_tracehook(),
  *     __secure_computing(), trace_sys_enter()
- *  3) Invocation of audit_syscall_entry()
+ *  2) Invocation of audit_syscall_entry()
+ */
+long syscall_enter_from_user_mode_work(struct pt_regs *regs, long syscall);
+
+/**
+ * syscall_enter_from_user_mode - Establish state and check and handle work
+ *				  before invoking a syscall
+ * @regs:	Pointer to currents pt_regs
+ * @syscall:	The syscall number
+ *
+ * Invoked from architecture specific syscall entry code with interrupts
+ * disabled. The calling code has to be non-instrumentable. When the
+ * function returns all state is correct, interrupts are enabled and the
+ * subsequent functions can be instrumented.
+ *
+ * This is combination of syscall_enter_from_user_mode_prepare() and
+ * syscall_enter_from_user_mode_work().
+ *
+ * Returns: The original or a modified syscall number. See
+ * syscall_enter_from_user_mode_work() for further explanation.
  */
 long syscall_enter_from_user_mode(struct pt_regs *regs, long syscall);
 
diff --git a/kernel/entry/common.c b/kernel/entry/common.c
index fcae019158cad..18683598edbc6 100644
--- a/kernel/entry/common.c
+++ b/kernel/entry/common.c
@@ -69,22 +69,45 @@ static long syscall_trace_enter(struct pt_regs *regs, long syscall,
 	return ret ? : syscall_get_nr(current, regs);
 }
 
-noinstr long syscall_enter_from_user_mode(struct pt_regs *regs, long syscall)
+static __always_inline long
+__syscall_enter_from_user_work(struct pt_regs *regs, long syscall)
 {
 	unsigned long ti_work;
 
-	enter_from_user_mode(regs);
-	instrumentation_begin();
-
-	local_irq_enable();
 	ti_work = READ_ONCE(current_thread_info()->flags);
 	if (ti_work & SYSCALL_ENTER_WORK)
 		syscall = syscall_trace_enter(regs, syscall, ti_work);
-	instrumentation_end();
 
 	return syscall;
 }
 
+long syscall_enter_from_user_mode_work(struct pt_regs *regs, long syscall)
+{
+	return __syscall_enter_from_user_work(regs, syscall);
+}
+
+noinstr long syscall_enter_from_user_mode(struct pt_regs *regs, long syscall)
+{
+	long ret;
+
+	enter_from_user_mode(regs);
+
+	instrumentation_begin();
+	local_irq_enable();
+	ret = __syscall_enter_from_user_work(regs, syscall);
+	instrumentation_end();
+
+	return ret;
+}
+
+noinstr void syscall_enter_from_user_mode_prepare(struct pt_regs *regs)
+{
+	enter_from_user_mode(regs);
+	instrumentation_begin();
+	local_irq_enable();
+	instrumentation_end();
+}
+
 /**
  * exit_to_user_mode - Fixup state when exiting to user mode
  *
-- 
GitLab


From cfd54fa83a5068b61b7eb28d3c117d8354c74c7a Mon Sep 17 00:00:00 2001
From: Mathias Nyman <mathias.nyman@linux.intel.com>
Date: Tue, 1 Sep 2020 11:25:28 +0300
Subject: [PATCH 1039/1341] usb: Fix out of sync data toggle if a configured
 device is reconfigured

Userspace drivers that use a SetConfiguration() request to "lightweight"
reset an already configured usb device might cause data toggles to get out
of sync between the device and host, and the device becomes unusable.

The xHCI host requires endpoints to be dropped and added back to reset the
toggle. If USB core notices the new configuration is the same as the
current active configuration it will avoid these extra steps by calling
usb_reset_configuration() instead of usb_set_configuration().

A SetConfiguration() request will reset the device side data toggles.
Make sure usb_reset_configuration() function also drops and adds back the
endpoints to ensure data toggles are in sync.

To avoid code duplication split the current usb_disable_device() function
and reuse the endpoint specific part.

Cc: stable <stable@vger.kernel.org>
Tested-by: Martin Thierer <mthierer@gmail.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20200901082528.12557-1-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/message.c | 91 ++++++++++++++++++--------------------
 1 file changed, 42 insertions(+), 49 deletions(-)

diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c
index 6197938dcc2d8..ae1de9cc4b094 100644
--- a/drivers/usb/core/message.c
+++ b/drivers/usb/core/message.c
@@ -1205,6 +1205,34 @@ void usb_disable_interface(struct usb_device *dev, struct usb_interface *intf,
 	}
 }
 
+/*
+ * usb_disable_device_endpoints -- Disable all endpoints for a device
+ * @dev: the device whose endpoints are being disabled
+ * @skip_ep0: 0 to disable endpoint 0, 1 to skip it.
+ */
+static void usb_disable_device_endpoints(struct usb_device *dev, int skip_ep0)
+{
+	struct usb_hcd *hcd = bus_to_hcd(dev->bus);
+	int i;
+
+	if (hcd->driver->check_bandwidth) {
+		/* First pass: Cancel URBs, leave endpoint pointers intact. */
+		for (i = skip_ep0; i < 16; ++i) {
+			usb_disable_endpoint(dev, i, false);
+			usb_disable_endpoint(dev, i + USB_DIR_IN, false);
+		}
+		/* Remove endpoints from the host controller internal state */
+		mutex_lock(hcd->bandwidth_mutex);
+		usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
+		mutex_unlock(hcd->bandwidth_mutex);
+	}
+	/* Second pass: remove endpoint pointers */
+	for (i = skip_ep0; i < 16; ++i) {
+		usb_disable_endpoint(dev, i, true);
+		usb_disable_endpoint(dev, i + USB_DIR_IN, true);
+	}
+}
+
 /**
  * usb_disable_device - Disable all the endpoints for a USB device
  * @dev: the device whose endpoints are being disabled
@@ -1218,7 +1246,6 @@ void usb_disable_interface(struct usb_device *dev, struct usb_interface *intf,
 void usb_disable_device(struct usb_device *dev, int skip_ep0)
 {
 	int i;
-	struct usb_hcd *hcd = bus_to_hcd(dev->bus);
 
 	/* getting rid of interfaces will disconnect
 	 * any drivers bound to them (a key side effect)
@@ -1264,22 +1291,8 @@ void usb_disable_device(struct usb_device *dev, int skip_ep0)
 
 	dev_dbg(&dev->dev, "%s nuking %s URBs\n", __func__,
 		skip_ep0 ? "non-ep0" : "all");
-	if (hcd->driver->check_bandwidth) {
-		/* First pass: Cancel URBs, leave endpoint pointers intact. */
-		for (i = skip_ep0; i < 16; ++i) {
-			usb_disable_endpoint(dev, i, false);
-			usb_disable_endpoint(dev, i + USB_DIR_IN, false);
-		}
-		/* Remove endpoints from the host controller internal state */
-		mutex_lock(hcd->bandwidth_mutex);
-		usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
-		mutex_unlock(hcd->bandwidth_mutex);
-		/* Second pass: remove endpoint pointers */
-	}
-	for (i = skip_ep0; i < 16; ++i) {
-		usb_disable_endpoint(dev, i, true);
-		usb_disable_endpoint(dev, i + USB_DIR_IN, true);
-	}
+
+	usb_disable_device_endpoints(dev, skip_ep0);
 }
 
 /**
@@ -1522,6 +1535,9 @@ EXPORT_SYMBOL_GPL(usb_set_interface);
  * The caller must own the device lock.
  *
  * Return: Zero on success, else a negative error code.
+ *
+ * If this routine fails the device will probably be in an unusable state
+ * with endpoints disabled, and interfaces only partially enabled.
  */
 int usb_reset_configuration(struct usb_device *dev)
 {
@@ -1537,10 +1553,7 @@ int usb_reset_configuration(struct usb_device *dev)
 	 * calls during probe() are fine
 	 */
 
-	for (i = 1; i < 16; ++i) {
-		usb_disable_endpoint(dev, i, true);
-		usb_disable_endpoint(dev, i + USB_DIR_IN, true);
-	}
+	usb_disable_device_endpoints(dev, 1); /* skip ep0*/
 
 	config = dev->actconfig;
 	retval = 0;
@@ -1553,34 +1566,10 @@ int usb_reset_configuration(struct usb_device *dev)
 		mutex_unlock(hcd->bandwidth_mutex);
 		return -ENOMEM;
 	}
-	/* Make sure we have enough bandwidth for each alternate setting 0 */
-	for (i = 0; i < config->desc.bNumInterfaces; i++) {
-		struct usb_interface *intf = config->interface[i];
-		struct usb_host_interface *alt;
 
-		alt = usb_altnum_to_altsetting(intf, 0);
-		if (!alt)
-			alt = &intf->altsetting[0];
-		if (alt != intf->cur_altsetting)
-			retval = usb_hcd_alloc_bandwidth(dev, NULL,
-					intf->cur_altsetting, alt);
-		if (retval < 0)
-			break;
-	}
-	/* If not, reinstate the old alternate settings */
+	/* xHCI adds all endpoints in usb_hcd_alloc_bandwidth */
+	retval = usb_hcd_alloc_bandwidth(dev, config, NULL, NULL);
 	if (retval < 0) {
-reset_old_alts:
-		for (i--; i >= 0; i--) {
-			struct usb_interface *intf = config->interface[i];
-			struct usb_host_interface *alt;
-
-			alt = usb_altnum_to_altsetting(intf, 0);
-			if (!alt)
-				alt = &intf->altsetting[0];
-			if (alt != intf->cur_altsetting)
-				usb_hcd_alloc_bandwidth(dev, NULL,
-						alt, intf->cur_altsetting);
-		}
 		usb_enable_lpm(dev);
 		mutex_unlock(hcd->bandwidth_mutex);
 		return retval;
@@ -1589,8 +1578,12 @@ int usb_reset_configuration(struct usb_device *dev)
 			USB_REQ_SET_CONFIGURATION, 0,
 			config->desc.bConfigurationValue, 0,
 			NULL, 0, USB_CTRL_SET_TIMEOUT);
-	if (retval < 0)
-		goto reset_old_alts;
+	if (retval < 0) {
+		usb_hcd_alloc_bandwidth(dev, NULL, NULL, NULL);
+		usb_enable_lpm(dev);
+		mutex_unlock(hcd->bandwidth_mutex);
+		return retval;
+	}
 	mutex_unlock(hcd->bandwidth_mutex);
 
 	/* re-init hc/hcd interface/endpoint state */
-- 
GitLab


From 290a405ce318d036666c4155d5899eb8cd6e0d97 Mon Sep 17 00:00:00 2001
From: Madhusudanarao Amara <madhusudanarao.amara@intel.com>
Date: Wed, 26 Aug 2020 00:08:11 +0530
Subject: [PATCH 1040/1341] usb: typec: intel_pmc_mux: Un-register the USB role
 switch

Added missing code for un-register USB role switch in the remove and
error path.

Cc: Stable <stable@vger.kernel.org> # v5.8
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Fixes: 6701adfa9693b ("usb: typec: driver for Intel PMC mux control")
Signed-off-by: Madhusudanarao Amara <madhusudanarao.amara@intel.com>
Link: https://lore.kernel.org/r/20200825183811.7262-1-madhusudanarao.amara@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/mux/intel_pmc_mux.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
index e4021e13af40a..fd9008f192087 100644
--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -497,6 +497,7 @@ static int pmc_usb_probe(struct platform_device *pdev)
 	for (i = 0; i < pmc->num_ports; i++) {
 		typec_switch_unregister(pmc->port[i].typec_sw);
 		typec_mux_unregister(pmc->port[i].typec_mux);
+		usb_role_switch_unregister(pmc->port[i].usb_sw);
 	}
 
 	return ret;
@@ -510,6 +511,7 @@ static int pmc_usb_remove(struct platform_device *pdev)
 	for (i = 0; i < pmc->num_ports; i++) {
 		typec_switch_unregister(pmc->port[i].typec_sw);
 		typec_mux_unregister(pmc->port[i].typec_mux);
+		usb_role_switch_unregister(pmc->port[i].usb_sw);
 	}
 
 	return 0;
-- 
GitLab


From 1f3546ff3f0a1000971daef58406954bad3f7061 Mon Sep 17 00:00:00 2001
From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Date: Fri, 4 Sep 2020 14:09:18 +0300
Subject: [PATCH 1041/1341] usb: typec: ucsi: acpi: Check the _DEP dependencies

Failing probe with -EPROBE_DEFER until all dependencies
listed in the _DEP (Operation Region Dependencies) object
have been met.

This will fix an issue where on some platforms UCSI ACPI
driver fails to probe because the address space handler for
the operation region that the UCSI ACPI interface uses has
not been loaded yet.

Fixes: 8243edf44152 ("usb: typec: ucsi: Add ACPI driver")
Cc: stable@vger.kernel.org
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20200904110918.51546-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/ucsi/ucsi_acpi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/typec/ucsi/ucsi_acpi.c b/drivers/usb/typec/ucsi/ucsi_acpi.c
index 9fc4f338e8700..c0aca2f0f23f0 100644
--- a/drivers/usb/typec/ucsi/ucsi_acpi.c
+++ b/drivers/usb/typec/ucsi/ucsi_acpi.c
@@ -112,11 +112,15 @@ static void ucsi_acpi_notify(acpi_handle handle, u32 event, void *data)
 
 static int ucsi_acpi_probe(struct platform_device *pdev)
 {
+	struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
 	struct ucsi_acpi *ua;
 	struct resource *res;
 	acpi_status status;
 	int ret;
 
+	if (adev->dep_unmet)
+		return -EPROBE_DEFER;
+
 	ua = devm_kzalloc(&pdev->dev, sizeof(*ua), GFP_KERNEL);
 	if (!ua)
 		return -ENOMEM;
-- 
GitLab


From a6498d51821edf9615b42b968fb419a40197a982 Mon Sep 17 00:00:00 2001
From: Amjad Ouled-Ameur <aouledameur@baylibre.com>
Date: Thu, 27 Aug 2020 16:48:10 +0200
Subject: [PATCH 1042/1341] Revert "usb: dwc3: meson-g12a: fix shared reset
 control use"

This reverts commit 7a410953d1fb4dbe91ffcfdee9cbbf889d19b0d7.

This commit breaks USB on meson-gxl-s905x-libretech-cc. Reverting
the change solves the issue.

In fact, according to the reset framework code, consumers must not use
reset_control_(de)assert() on shared reset lines when reset_control_reset
has been used, and vice-versa.

Moreover, with this commit, usb is not guaranted to be reset since the
reset is likely to be initially deasserted.

Reverting the commit will bring back the suspend warning mentioned in the
commit description. Nevertheless, a warning is much less critical than
breaking dwc3-meson-g12a USB completely. We will address the warning
issue in another way as a 2nd step.

Fixes: 7a410953d1fb ("usb: dwc3: meson-g12a: fix shared reset control use")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Amjad Ouled-Ameur <aouledameur@baylibre.com>
Reported-by: Jerome Brunet <jbrunet@baylibre.com>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Link: https://lore.kernel.org/r/20200827144810.26657-1-aouledameur@baylibre.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/dwc3/dwc3-meson-g12a.c | 15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

diff --git a/drivers/usb/dwc3/dwc3-meson-g12a.c b/drivers/usb/dwc3/dwc3-meson-g12a.c
index 88b75b5a039c9..1f7f4d88ed9d8 100644
--- a/drivers/usb/dwc3/dwc3-meson-g12a.c
+++ b/drivers/usb/dwc3/dwc3-meson-g12a.c
@@ -737,13 +737,13 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
 		goto err_disable_clks;
 	}
 
-	ret = reset_control_deassert(priv->reset);
+	ret = reset_control_reset(priv->reset);
 	if (ret)
-		goto err_assert_reset;
+		goto err_disable_clks;
 
 	ret = dwc3_meson_g12a_get_phys(priv);
 	if (ret)
-		goto err_assert_reset;
+		goto err_disable_clks;
 
 	ret = priv->drvdata->setup_regmaps(priv, base);
 	if (ret)
@@ -752,7 +752,7 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
 	if (priv->vbus) {
 		ret = regulator_enable(priv->vbus);
 		if (ret)
-			goto err_assert_reset;
+			goto err_disable_clks;
 	}
 
 	/* Get dr_mode */
@@ -765,13 +765,13 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
 
 	ret = priv->drvdata->usb_init(priv);
 	if (ret)
-		goto err_assert_reset;
+		goto err_disable_clks;
 
 	/* Init PHYs */
 	for (i = 0 ; i < PHY_COUNT ; ++i) {
 		ret = phy_init(priv->phys[i]);
 		if (ret)
-			goto err_assert_reset;
+			goto err_disable_clks;
 	}
 
 	/* Set PHY Power */
@@ -809,9 +809,6 @@ static int dwc3_meson_g12a_probe(struct platform_device *pdev)
 	for (i = 0 ; i < PHY_COUNT ; ++i)
 		phy_exit(priv->phys[i]);
 
-err_assert_reset:
-	reset_control_assert(priv->reset);
-
 err_disable_clks:
 	clk_bulk_disable_unprepare(priv->drvdata->num_clks,
 				   priv->drvdata->clks);
-- 
GitLab


From a18cd6c9b6bc73dc17e8b7e9bd07decaa8833c97 Mon Sep 17 00:00:00 2001
From: Zeng Tao <prime.zeng@hisilicon.com>
Date: Fri, 4 Sep 2020 14:37:44 +0800
Subject: [PATCH 1043/1341] usb: core: fix slab-out-of-bounds Read in
 read_descriptors

The USB device descriptor may get changed between two consecutive
enumerations on the same device for some reason, such as DFU or
malicius device.
In that case, we may access the changing descriptor if we don't take
the device lock here.

The issue is reported:
https://syzkaller.appspot.com/bug?id=901a0d9e6519ef8dc7acab25344bd287dd3c7be9

Cc: stable <stable@vger.kernel.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Reported-by: syzbot+256e56ddde8b8957eabd@syzkaller.appspotmail.com
Fixes: 217a9081d8e6 ("USB: add all configs to the "descriptors" attribute")
Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com>
Link: https://lore.kernel.org/r/1599201467-11000-1-git-send-email-prime.zeng@hisilicon.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/sysfs.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index a2ca38e25e0c3..8d134193fa0cf 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -889,7 +889,11 @@ read_descriptors(struct file *filp, struct kobject *kobj,
 	size_t srclen, n;
 	int cfgno;
 	void *src;
+	int retval;
 
+	retval = usb_lock_device_interruptible(udev);
+	if (retval < 0)
+		return -EINTR;
 	/* The binary attribute begins with the device descriptor.
 	 * Following that are the raw descriptor entries for all the
 	 * configurations (config plus subsidiary descriptors).
@@ -914,6 +918,7 @@ read_descriptors(struct file *filp, struct kobject *kobj,
 			off -= srclen;
 		}
 	}
+	usb_unlock_device(udev);
 	return count - nleft;
 }
 
-- 
GitLab


From b52a95eac112f6f21f0c93987c0bbf3e91bfbf88 Mon Sep 17 00:00:00 2001
From: Jim Cromie <jim.cromie@gmail.com>
Date: Mon, 31 Aug 2020 12:22:08 -0600
Subject: [PATCH 1044/1341] dyndbg: give %3u width in pr-format, cosmetic only

Specify the print-width so log entries line up nicely.

no functional changes.

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Link: https://lore.kernel.org/r/20200831182210.850852-2-jim.cromie@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 lib/dynamic_debug.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 1d012e597cc3f..01b7d0210412c 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -947,7 +947,7 @@ int ddebug_add_module(struct _ddebug *tab, unsigned int n,
 	list_add(&dt->link, &ddebug_tables);
 	mutex_unlock(&ddebug_lock);
 
-	v2pr_info("%u debug prints in module %s\n", n, dt->mod_name);
+	v2pr_info("%3u debug prints in module %s\n", n, dt->mod_name);
 	return 0;
 }
 
-- 
GitLab


From a2d375eda771a6a4866f3717a8ed81b63acb1dbd Mon Sep 17 00:00:00 2001
From: Jim Cromie <jim.cromie@gmail.com>
Date: Mon, 31 Aug 2020 12:22:09 -0600
Subject: [PATCH 1045/1341] dyndbg: refine export, rename to
 dynamic_debug_exec_queries()

commit 4c0d77828d4f ("dyndbg: export ddebug_exec_queries") had a few
problems:
 - broken non DYNAMIC_DEBUG_CORE configs, sparse warning
 - the exported function modifies query string, breaks on RO strings.
 - func name follows internal convention, shouldn't be exposed as is.

1st is fixed in header with ifdefd function prototype or stub defn.
Also remove an obsolete HAVE-symbol ifdef-comment, and add others.

Fix others by wrapping existing internal function with a new one,
named in accordance with module-prefix naming convention, before
export hits v5.9.0.  In new function, copy query string to a local
buffer, so users can pass hard-coded/RO queries, and internal function
can be used unchanged.

Fixes: 4c0d77828d4f ("dyndbg: export ddebug_exec_queries")
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Link: https://lore.kernel.org/r/20200831182210.850852-3-jim.cromie@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/dynamic_debug.h | 20 ++++++++++++++++----
 lib/dynamic_debug.c           | 27 +++++++++++++++++++++++++--
 2 files changed, 41 insertions(+), 6 deletions(-)

diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h
index aa9ff9e1c0b32..8aa0c7c2608cb 100644
--- a/include/linux/dynamic_debug.h
+++ b/include/linux/dynamic_debug.h
@@ -49,6 +49,10 @@ struct _ddebug {
 
 
 #if defined(CONFIG_DYNAMIC_DEBUG_CORE)
+
+/* exported for module authors to exercise >control */
+int dynamic_debug_exec_queries(const char *query, const char *modname);
+
 int ddebug_add_module(struct _ddebug *tab, unsigned int n,
 				const char *modname);
 extern int ddebug_remove_module(const char *mod_name);
@@ -105,7 +109,7 @@ void __dynamic_ibdev_dbg(struct _ddebug *descriptor,
 	static_branch_unlikely(&descriptor.key.dd_key_false)
 #endif
 
-#else /* !HAVE_JUMP_LABEL */
+#else /* !CONFIG_JUMP_LABEL */
 
 #define _DPRINTK_KEY_INIT
 
@@ -117,7 +121,7 @@ void __dynamic_ibdev_dbg(struct _ddebug *descriptor,
 	unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)
 #endif
 
-#endif
+#endif /* CONFIG_JUMP_LABEL */
 
 #define __dynamic_func_call(id, fmt, func, ...) do {	\
 	DEFINE_DYNAMIC_DEBUG_METADATA(id, fmt);		\
@@ -172,10 +176,11 @@ void __dynamic_ibdev_dbg(struct _ddebug *descriptor,
 				   KERN_DEBUG, prefix_str, prefix_type,	\
 				   rowsize, groupsize, buf, len, ascii)
 
-#else
+#else /* !CONFIG_DYNAMIC_DEBUG_CORE */
 
 #include <linux/string.h>
 #include <linux/errno.h>
+#include <linux/printk.h>
 
 static inline int ddebug_add_module(struct _ddebug *tab, unsigned int n,
 				    const char *modname)
@@ -210,6 +215,13 @@ static inline int ddebug_dyndbg_module_param_cb(char *param, char *val,
 		print_hex_dump(KERN_DEBUG, prefix_str, prefix_type,	\
 				rowsize, groupsize, buf, len, ascii);	\
 	} while (0)
-#endif
+
+static inline int dynamic_debug_exec_queries(const char *query, const char *modname)
+{
+	pr_warn("kernel not built with CONFIG_DYNAMIC_DEBUG_CORE\n");
+	return 0;
+}
+
+#endif /* !CONFIG_DYNAMIC_DEBUG_CORE */
 
 #endif
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 01b7d0210412c..08e4b057514c9 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -525,7 +525,7 @@ static int ddebug_exec_query(char *query_string, const char *modname)
    last error or number of matching callsites.  Module name is either
    in param (for boot arg) or perhaps in query string.
 */
-int ddebug_exec_queries(char *query, const char *modname)
+static int ddebug_exec_queries(char *query, const char *modname)
 {
 	char *split;
 	int i, errs = 0, exitcode = 0, rc, nfound = 0;
@@ -557,7 +557,30 @@ int ddebug_exec_queries(char *query, const char *modname)
 		return exitcode;
 	return nfound;
 }
-EXPORT_SYMBOL_GPL(ddebug_exec_queries);
+
+/**
+ * dynamic_debug_exec_queries - select and change dynamic-debug prints
+ * @query: query-string described in admin-guide/dynamic-debug-howto
+ * @modname: string containing module name, usually &module.mod_name
+ *
+ * This uses the >/proc/dynamic_debug/control reader, allowing module
+ * authors to modify their dynamic-debug callsites. The modname is
+ * canonically struct module.mod_name, but can also be null or a
+ * module-wildcard, for example: "drm*".
+ */
+int dynamic_debug_exec_queries(const char *query, const char *modname)
+{
+	int rc;
+	char *qry = kstrndup(query, PAGE_SIZE, GFP_KERNEL);
+
+	if (!query)
+		return -ENOMEM;
+
+	rc = ddebug_exec_queries(qry, modname);
+	kfree(qry);
+	return rc;
+}
+EXPORT_SYMBOL_GPL(dynamic_debug_exec_queries);
 
 #define PREFIX_SIZE 64
 
-- 
GitLab


From 42f07816ac0cc797928119cc039c414ae2b95d34 Mon Sep 17 00:00:00 2001
From: Jim Cromie <jim.cromie@gmail.com>
Date: Mon, 31 Aug 2020 12:22:10 -0600
Subject: [PATCH 1046/1341] dyndbg: fix problem parsing format="foo bar"

commit 14775b049642 ("dyndbg: accept query terms like file=bar and
module=foo") added the combined keyword=value parsing poorly; revert
most of it, keeping the keyword & arg change.

Instead, fix the tokenizer for the new input, by terminating the
keyword (an unquoted word) on '=' as well as space, thus letting the
tokenizer work on the quoted argument, like it would have previously.

Also add a few debug-prints to show more parsing context, into
tokenizer and parse-query, and use "keyword, value" in others.

Fixes: 14775b049642 ("dyndbg: accept query terms like file=bar and module=foo")
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Link: https://lore.kernel.org/r/20200831182210.850852-4-jim.cromie@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 lib/dynamic_debug.c | 38 +++++++++++++++++---------------------
 1 file changed, 17 insertions(+), 21 deletions(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 08e4b057514c9..04f4c80b0d162 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -237,6 +237,7 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
 {
 	int nwords = 0;
 
+	vpr_info("entry, buf:'%s'\n", buf);
 	while (*buf) {
 		char *end;
 
@@ -247,6 +248,8 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
 		if (*buf == '#')
 			break;	/* token starts comment, skip rest of line */
 
+		vpr_info("start-of-word:%d '%s'\n", nwords, buf);
+
 		/* find `end' of word, whitespace separated or quoted */
 		if (*buf == '"' || *buf == '\'') {
 			int quote = *buf++;
@@ -257,7 +260,9 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
 				return -EINVAL;	/* unclosed quote */
 			}
 		} else {
-			for (end = buf; *end && !isspace(*end); end++)
+			for (end = buf;
+			     *end && *end != '=' && !isspace(*end);
+			     end++)
 				;
 			BUG_ON(end == buf);
 		}
@@ -373,30 +378,21 @@ static int ddebug_parse_query(char *words[], int nwords,
 	unsigned int i;
 	int rc = 0;
 	char *fline;
-	char *keyword, *arg;
 
-	if (modname)
+	if (nwords % 2 != 0) {
+		pr_err("expecting pairs of match-spec <value>\n");
+		return -EINVAL;
+	}
+	if (modname) {
 		/* support $modname.dyndbg=<multiple queries> */
+		vpr_info("module:%s queries:'%s'\n", modname);
 		query->module = modname;
+	}
+	for (i = 0; i < nwords; i += 2) {
+		char *keyword = words[i];
+		char *arg = words[i+1];
 
-	for (i = 0; i < nwords; i++) {
-		/* accept keyword=arg */
-		vpr_info("%d w:%s\n", i, words[i]);
-
-		keyword = words[i];
-		arg = strchr(keyword, '=');
-		if (arg) {
-			*arg++ = '\0';
-		} else {
-			i++; /* next word is arg */
-			if (!(i < nwords)) {
-				pr_err("missing arg to keyword: %s\n", keyword);
-				return -EINVAL;
-			}
-			arg = words[i];
-		}
-		vpr_info("%d key:%s arg:%s\n", i, keyword, arg);
-
+		vpr_info("keyword:'%s' value:'%s'\n", keyword, arg);
 		if (!strcmp(keyword, "func")) {
 			rc = check_set(&query->function, arg, "func");
 		} else if (!strcmp(keyword, "file")) {
-- 
GitLab


From bd018a6a75cebb511bb55a0e7690024be975fe93 Mon Sep 17 00:00:00 2001
From: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Date: Mon, 31 Aug 2020 19:37:00 +0900
Subject: [PATCH 1047/1341] video: fbdev: fix OOB read in
 vga_8planes_imageblit()

syzbot is reporting OOB read at vga_8planes_imageblit() [1], for
"cdat[y] >> 4" can become a negative value due to "const char *cdat".

[1] https://syzkaller.appspot.com/bug?id=0d7a0da1557dcd1989e00cb3692b26d4173b4132

Reported-by: syzbot <syzbot+69fbd3e01470f169c8c4@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/90b55ec3-d5b0-3307-9f7c-7ff5c5fd6ad3@i-love.sakura.ne.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/video/fbdev/vga16fb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/vga16fb.c b/drivers/video/fbdev/vga16fb.c
index a20eeb8308ffd..578d3541e3d6f 100644
--- a/drivers/video/fbdev/vga16fb.c
+++ b/drivers/video/fbdev/vga16fb.c
@@ -1121,7 +1121,7 @@ static void vga_8planes_imageblit(struct fb_info *info, const struct fb_image *i
         char oldop = setop(0);
         char oldsr = setsr(0);
         char oldmask = selectmask();
-        const char *cdat = image->data;
+	const unsigned char *cdat = image->data;
 	u32 dx = image->dx;
         char __iomem *where;
         int y;
-- 
GitLab


From e3b9fc7eec55e6fdc8beeed18f2ed207086341e2 Mon Sep 17 00:00:00 2001
From: Vladis Dronov <vdronov@redhat.com>
Date: Tue, 11 Aug 2020 17:01:29 +0200
Subject: [PATCH 1048/1341] debugfs: Fix module state check condition

The '#ifdef MODULE' check in the original commit does not work as intended.
The code under the check is not built at all if CONFIG_DEBUG_FS=y. Fix this
by using a correct check.

Fixes: 275678e7a9be ("debugfs: Check module state before warning in {full/open}_proxy_open()")
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200811150129.53343-1-vdronov@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/debugfs/file.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index b167d2d021484..a768a09430c3a 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -177,7 +177,7 @@ static int open_proxy_open(struct inode *inode, struct file *filp)
 		goto out;
 
 	if (!fops_get(real_fops)) {
-#ifdef MODULE
+#ifdef CONFIG_MODULES
 		if (real_fops->owner &&
 		    real_fops->owner->state == MODULE_STATE_GOING)
 			goto out;
@@ -312,7 +312,7 @@ static int full_proxy_open(struct inode *inode, struct file *filp)
 		goto out;
 
 	if (!fops_get(real_fops)) {
-#ifdef MODULE
+#ifdef CONFIG_MODULES
 		if (real_fops->owner &&
 		    real_fops->owner->state == MODULE_STATE_GOING)
 			goto out;
-- 
GitLab


From 693a8e936590f93451e6f5a3d748616f5a59c80b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Miros=C5=82aw?= <mirq-linux@rere.qmqm.pl>
Date: Fri, 28 Aug 2020 18:14:35 +0200
Subject: [PATCH 1049/1341] driver code: print symbolic error code
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

dev_err_probe() prepends the message with an error code. Let's make it
more readable by translating the code to a more recognisable symbol.

Fixes: a787e5400a1c ("driver core: add device probe log helper")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://lore.kernel.org/r/ea3f973e4708919573026fdce52c264db147626d.1598630856.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/base/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index ac1046a382bc0..1a4706310b28a 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -4237,10 +4237,10 @@ int dev_err_probe(const struct device *dev, int err, const char *fmt, ...)
 	vaf.va = &args;
 
 	if (err != -EPROBE_DEFER) {
-		dev_err(dev, "error %d: %pV", err, &vaf);
+		dev_err(dev, "error %pe: %pV", ERR_PTR(err), &vaf);
 	} else {
 		device_set_deferred_probe_reason(dev, &vaf);
-		dev_dbg(dev, "error %d: %pV", err, &vaf);
+		dev_dbg(dev, "error %pe: %pV", ERR_PTR(err), &vaf);
 	}
 
 	va_end(args);
-- 
GitLab


From 51de18bff23362bfaa3c7af33bb455de274b49c9 Mon Sep 17 00:00:00 2001
From: Krzysztof Kozlowski <krzk@kernel.org>
Date: Thu, 27 Aug 2020 20:20:29 +0200
Subject: [PATCH 1050/1341] MAINTAINERS: Add the security document to SECURITY
 CONTACT

When changing the document related to kernel security workflow, notify
the security mailing list as its concerned by this.

Cc: <security@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200827182029.3458-1-krzk@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index f0068bceeb615..c5317a7ddee0a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -15546,6 +15546,7 @@ F:	include/uapi/linux/sed*
 SECURITY CONTACT
 M:	Security Officers <security@kernel.org>
 S:	Supported
+F:	Documentation/admin-guide/security-bugs.rst
 
 SECURITY SUBSYSTEM
 M:	James Morris <jmorris@namei.org>
-- 
GitLab


From 7b81ce7cdcef3a3ae71eb3fb863433c646b4a2f4 Mon Sep 17 00:00:00 2001
From: Barret Rhoden <brho@google.com>
Date: Fri, 4 Sep 2020 09:53:32 -0400
Subject: [PATCH 1051/1341] init: fix error check in clean_path()

init_stat() returns 0 on success, same as vfs_lstat().  When it replaced
vfs_lstat(), the '!' was dropped.

Fixes: 716308a5331b ("init: add an init_stat helper")
Signed-off-by: Barret Rhoden <brho@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 init/initramfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/init/initramfs.c b/init/initramfs.c
index e6dbfb767057d..1f97c0328a7ae 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -297,7 +297,7 @@ static void __init clean_path(char *path, umode_t fmode)
 {
 	struct kstat st;
 
-	if (init_stat(path, &st, AT_SYMLINK_NOFOLLOW) &&
+	if (!init_stat(path, &st, AT_SYMLINK_NOFOLLOW) &&
 	    (st.mode ^ fmode) & S_IFMT) {
 		if (S_ISDIR(st.mode))
 			init_rmdir(path);
-- 
GitLab


From cfc905f158eaa099d6258031614d11869e7ef71c Mon Sep 17 00:00:00 2001
From: Leon Romanovsky <leonro@nvidia.com>
Date: Fri, 4 Sep 2020 18:58:08 +0300
Subject: [PATCH 1052/1341] gcov: Disable gcov build with GCC 10

GCOV built with GCC 10 doesn't initialize n_function variable.  This
produces different kernel panics as was seen by Colin in Ubuntu and me
in FC 32.

As a workaround, let's disable GCOV build for broken GCC 10 version.

Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1891288
Link: https://lore.kernel.org/lkml/20200827133932.3338519-1-leon@kernel.org
Link: https://lore.kernel.org/lkml/CAHk-=whbijeSdSvx-Xcr0DPMj0BiwhJ+uiNnDSVZcr_h_kg7UA@mail.gmail.com/
Cc: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 kernel/gcov/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig
index 3110c77230c7f..bb4b680e8455a 100644
--- a/kernel/gcov/Kconfig
+++ b/kernel/gcov/Kconfig
@@ -4,6 +4,7 @@ menu "GCOV-based kernel profiling"
 config GCOV_KERNEL
 	bool "Enable gcov-based kernel profiling"
 	depends on DEBUG_FS
+	depends on !CC_IS_GCC || GCC_VERSION < 100000
 	select CONSTRUCTORS if !UML
 	default n
 	help
-- 
GitLab


From 6b57b15abe11aa334ebf726e02c0deaf123ba040 Mon Sep 17 00:00:00 2001
From: Saravana Kannan <saravanak@google.com>
Date: Tue, 1 Sep 2020 11:44:44 -0700
Subject: [PATCH 1053/1341] driver core: Fix device_pm_lock() locking for
 device links

This commit fixes two issues:

1. The lockdep warning reported by Dong Aisheng <dongas86@gmail.com> [1].

It is a warning about a cycle (dpm_list_mtx --> kn->active#3 --> fw_lock)
that was introduced when device-link devices were added to expose device
link information in sysfs.

The patch that "introduced" this cycle can't be reverted because it's fixes
a real SRCU issue and also ensures that the device-link device is deleted
as soon as the device-link is deleted. This is important to avoid sysfs
name collisions if the device-link is create again immediately (this can
happen a lot with deferred probing).

2. Inconsistency in grabbing device_pm_lock() during device link deletion

Some device link deletion code paths grab device_pm_lock(), while others
don't.  The device_pm_lock() is grabbed during device_link_add() because it
checks if the supplier is in the dpm_list and also reorders the dpm_list.
However, when a device link is deleted, it does not do either of those and
therefore device_pm_lock() is not necessary. Dropping the device_pm_lock()
in all the device link deletion paths removes the inconsistency in locking.

Thanks to Stephen Boyd for helping me understand the lockdep splat.

Fixes: 843e600b8a2b ("driver core: Fix sleeping in invalid context during device link deletion")
[1] - https://lore.kernel.org/lkml/CAA+hA=S4eAreb7vo69LAXSk2t5=DEKNxHaiY1wSpk4xTp9urLg@mail.gmail.com/
Reported-by: Dong Aisheng <dongas86@gmail.com>
Signed-off-by: Saravana Kannan <saravanak@google.com>
Tested-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20200901184445.1736658-1-saravanak@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/base/core.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 1a4706310b28a..97812a5f42b88 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -807,9 +807,7 @@ static void device_link_put_kref(struct device_link *link)
 void device_link_del(struct device_link *link)
 {
 	device_links_write_lock();
-	device_pm_lock();
 	device_link_put_kref(link);
-	device_pm_unlock();
 	device_links_write_unlock();
 }
 EXPORT_SYMBOL_GPL(device_link_del);
@@ -830,7 +828,6 @@ void device_link_remove(void *consumer, struct device *supplier)
 		return;
 
 	device_links_write_lock();
-	device_pm_lock();
 
 	list_for_each_entry(link, &supplier->links.consumers, s_node) {
 		if (link->consumer == consumer) {
@@ -839,7 +836,6 @@ void device_link_remove(void *consumer, struct device *supplier)
 		}
 	}
 
-	device_pm_unlock();
 	device_links_write_unlock();
 }
 EXPORT_SYMBOL_GPL(device_link_remove);
-- 
GitLab


From 09854ba94c6aad7886996bfbee2530b3d8a7f4f4 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Fri, 21 Aug 2020 19:49:55 -0400
Subject: [PATCH 1054/1341] mm: do_wp_page() simplification

How about we just make sure we're the only possible valid user fo the
page before we bother to reuse it?

Simplify, simplify, simplify.

And get rid of the nasty serialization on the page lock at the same time.

[peterx: add subject prefix]

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/memory.c | 59 +++++++++++++++--------------------------------------
 1 file changed, 17 insertions(+), 42 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 3ecad55103adb..56ae945c6845d 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2924,50 +2924,25 @@ static vm_fault_t do_wp_page(struct vm_fault *vmf)
 	 * not dirty accountable.
 	 */
 	if (PageAnon(vmf->page)) {
-		int total_map_swapcount;
-		if (PageKsm(vmf->page) && (PageSwapCache(vmf->page) ||
-					   page_count(vmf->page) != 1))
+		struct page *page = vmf->page;
+
+		/* PageKsm() doesn't necessarily raise the page refcount */
+		if (PageKsm(page) || page_count(page) != 1)
+			goto copy;
+		if (!trylock_page(page))
+			goto copy;
+		if (PageKsm(page) || page_mapcount(page) != 1 || page_count(page) != 1) {
+			unlock_page(page);
 			goto copy;
-		if (!trylock_page(vmf->page)) {
-			get_page(vmf->page);
-			pte_unmap_unlock(vmf->pte, vmf->ptl);
-			lock_page(vmf->page);
-			vmf->pte = pte_offset_map_lock(vma->vm_mm, vmf->pmd,
-					vmf->address, &vmf->ptl);
-			if (!pte_same(*vmf->pte, vmf->orig_pte)) {
-				update_mmu_tlb(vma, vmf->address, vmf->pte);
-				unlock_page(vmf->page);
-				pte_unmap_unlock(vmf->pte, vmf->ptl);
-				put_page(vmf->page);
-				return 0;
-			}
-			put_page(vmf->page);
-		}
-		if (PageKsm(vmf->page)) {
-			bool reused = reuse_ksm_page(vmf->page, vmf->vma,
-						     vmf->address);
-			unlock_page(vmf->page);
-			if (!reused)
-				goto copy;
-			wp_page_reuse(vmf);
-			return VM_FAULT_WRITE;
-		}
-		if (reuse_swap_page(vmf->page, &total_map_swapcount)) {
-			if (total_map_swapcount == 1) {
-				/*
-				 * The page is all ours. Move it to
-				 * our anon_vma so the rmap code will
-				 * not search our parent or siblings.
-				 * Protected against the rmap code by
-				 * the page lock.
-				 */
-				page_move_anon_rmap(vmf->page, vma);
-			}
-			unlock_page(vmf->page);
-			wp_page_reuse(vmf);
-			return VM_FAULT_WRITE;
 		}
-		unlock_page(vmf->page);
+		/*
+		 * Ok, we've got the only map reference, and the only
+		 * page count reference, and the page is locked,
+		 * it's dark out, and we're wearing sunglasses. Hit it.
+		 */
+		wp_page_reuse(vmf);
+		unlock_page(page);
+		return VM_FAULT_WRITE;
 	} else if (unlikely((vma->vm_flags & (VM_WRITE|VM_SHARED)) ==
 					(VM_WRITE|VM_SHARED))) {
 		return wp_page_shared(vmf);
-- 
GitLab


From 1a0cf26323c80e2f1c58fc04f15686de61bfab0c Mon Sep 17 00:00:00 2001
From: Peter Xu <peterx@redhat.com>
Date: Fri, 21 Aug 2020 19:49:56 -0400
Subject: [PATCH 1055/1341] mm/ksm: Remove reuse_ksm_page()

Remove the function as the last reference has gone away with the do_wp_page()
changes.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/ksm.h |  7 -------
 mm/ksm.c            | 25 -------------------------
 2 files changed, 32 deletions(-)

diff --git a/include/linux/ksm.h b/include/linux/ksm.h
index e48b1e453ff51..161e8164abcf5 100644
--- a/include/linux/ksm.h
+++ b/include/linux/ksm.h
@@ -53,8 +53,6 @@ struct page *ksm_might_need_to_copy(struct page *page,
 
 void rmap_walk_ksm(struct page *page, struct rmap_walk_control *rwc);
 void ksm_migrate_page(struct page *newpage, struct page *oldpage);
-bool reuse_ksm_page(struct page *page,
-			struct vm_area_struct *vma, unsigned long address);
 
 #else  /* !CONFIG_KSM */
 
@@ -88,11 +86,6 @@ static inline void rmap_walk_ksm(struct page *page,
 static inline void ksm_migrate_page(struct page *newpage, struct page *oldpage)
 {
 }
-static inline bool reuse_ksm_page(struct page *page,
-			struct vm_area_struct *vma, unsigned long address)
-{
-	return false;
-}
 #endif /* CONFIG_MMU */
 #endif /* !CONFIG_KSM */
 
diff --git a/mm/ksm.c b/mm/ksm.c
index 4102034cd55a1..12958287fac35 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -2660,31 +2660,6 @@ void rmap_walk_ksm(struct page *page, struct rmap_walk_control *rwc)
 		goto again;
 }
 
-bool reuse_ksm_page(struct page *page,
-		    struct vm_area_struct *vma,
-		    unsigned long address)
-{
-#ifdef CONFIG_DEBUG_VM
-	if (WARN_ON(is_zero_pfn(page_to_pfn(page))) ||
-			WARN_ON(!page_mapped(page)) ||
-			WARN_ON(!PageLocked(page))) {
-		dump_page(page, "reuse_ksm_page");
-		return false;
-	}
-#endif
-
-	if (PageSwapCache(page) || !page_stable_node(page))
-		return false;
-	/* Prohibit parallel get_ksm_page() */
-	if (!page_ref_freeze(page, 1))
-		return false;
-
-	page_move_anon_rmap(page, vma);
-	page->index = linear_page_index(vma, address);
-	page_ref_unfreeze(page, 1);
-
-	return true;
-}
 #ifdef CONFIG_MIGRATION
 void ksm_migrate_page(struct page *newpage, struct page *oldpage)
 {
-- 
GitLab


From a308c71bf1e6e19cc2e4ced31853ee0fc7cb439a Mon Sep 17 00:00:00 2001
From: Peter Xu <peterx@redhat.com>
Date: Fri, 21 Aug 2020 19:49:57 -0400
Subject: [PATCH 1056/1341] mm/gup: Remove enfornced COW mechanism

With the more strict (but greatly simplified) page reuse logic in
do_wp_page(), we can safely go back to the world where cow is not
enforced with writes.

This essentially reverts commit 17839856fd58 ("gup: document and work
around 'COW can break either way' issue").  There are some context
differences due to some changes later on around it:

  2170ecfa7688 ("drm/i915: convert get_user_pages() --> pin_user_pages()", 2020-06-03)
  376a34efa4ee ("mm/gup: refactor and de-duplicate gup_fast() code", 2020-06-03)

Some lines moved back and forth with those, but this revert patch should
have striped out and covered all the enforced cow bits anyways.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/gpu/drm/i915/gem/i915_gem_userptr.c |  8 -----
 mm/gup.c                                    | 40 +++------------------
 mm/huge_memory.c                            |  7 ++--
 3 files changed, 9 insertions(+), 46 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
index c31a6744daee9..853184db8e831 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
@@ -599,14 +599,6 @@ static int i915_gem_userptr_get_pages(struct drm_i915_gem_object *obj)
 				      GFP_KERNEL |
 				      __GFP_NORETRY |
 				      __GFP_NOWARN);
-		/*
-		 * Using __get_user_pages_fast() with a read-only
-		 * access is questionable. A read-only page may be
-		 * COW-broken, and then this might end up giving
-		 * the wrong side of the COW..
-		 *
-		 * We may or may not care.
-		 */
 		if (pvec) {
 			/* defer to worker if malloc fails */
 			if (!i915_gem_object_is_readonly(obj))
diff --git a/mm/gup.c b/mm/gup.c
index 6f47697f8fb0b..e3bd0d0b51205 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -381,22 +381,13 @@ static int follow_pfn_pte(struct vm_area_struct *vma, unsigned long address,
 }
 
 /*
- * FOLL_FORCE or a forced COW break can write even to unwritable pte's,
- * but only after we've gone through a COW cycle and they are dirty.
+ * FOLL_FORCE can write to even unwritable pte's, but only
+ * after we've gone through a COW cycle and they are dirty.
  */
 static inline bool can_follow_write_pte(pte_t pte, unsigned int flags)
 {
-	return pte_write(pte) || ((flags & FOLL_COW) && pte_dirty(pte));
-}
-
-/*
- * A (separate) COW fault might break the page the other way and
- * get_user_pages() would return the page from what is now the wrong
- * VM. So we need to force a COW break at GUP time even for reads.
- */
-static inline bool should_force_cow_break(struct vm_area_struct *vma, unsigned int flags)
-{
-	return is_cow_mapping(vma->vm_flags) && (flags & (FOLL_GET | FOLL_PIN));
+	return pte_write(pte) ||
+		((flags & FOLL_FORCE) && (flags & FOLL_COW) && pte_dirty(pte));
 }
 
 static struct page *follow_page_pte(struct vm_area_struct *vma,
@@ -1075,11 +1066,9 @@ static long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 				goto out;
 			}
 			if (is_vm_hugetlb_page(vma)) {
-				if (should_force_cow_break(vma, foll_flags))
-					foll_flags |= FOLL_WRITE;
 				i = follow_hugetlb_page(mm, vma, pages, vmas,
 						&start, &nr_pages, i,
-						foll_flags, locked);
+						gup_flags, locked);
 				if (locked && *locked == 0) {
 					/*
 					 * We've got a VM_FAULT_RETRY
@@ -1093,10 +1082,6 @@ static long __get_user_pages(struct task_struct *tsk, struct mm_struct *mm,
 				continue;
 			}
 		}
-
-		if (should_force_cow_break(vma, foll_flags))
-			foll_flags |= FOLL_WRITE;
-
 retry:
 		/*
 		 * If we have a pending SIGKILL, don't keep faulting pages and
@@ -2763,19 +2748,6 @@ static int internal_get_user_pages_fast(unsigned long start, int nr_pages,
 		return -EFAULT;
 
 	/*
-	 * The FAST_GUP case requires FOLL_WRITE even for pure reads,
-	 * because get_user_pages() may need to cause an early COW in
-	 * order to avoid confusing the normal COW routines. So only
-	 * targets that are already writable are safe to do by just
-	 * looking at the page tables.
-	 *
-	 * NOTE! With FOLL_FAST_ONLY we allow read-only gup_fast() here,
-	 * because there is no slow path to fall back on. But you'd
-	 * better be careful about possible COW pages - you'll get _a_
-	 * COW page, but not necessarily the one you intended to get
-	 * depending on what COW event happens after this. COW may break
-	 * the page copy in a random direction.
-	 *
 	 * Disable interrupts. The nested form is used, in order to allow
 	 * full, general purpose use of this routine.
 	 *
@@ -2788,8 +2760,6 @@ static int internal_get_user_pages_fast(unsigned long start, int nr_pages,
 	 */
 	if (IS_ENABLED(CONFIG_HAVE_FAST_GUP) && gup_fast_permitted(start, end)) {
 		unsigned long fast_flags = gup_flags;
-		if (!(gup_flags & FOLL_FAST_ONLY))
-			fast_flags |= FOLL_WRITE;
 
 		local_irq_save(flags);
 		gup_pgd_range(addr, end, fast_flags, pages, &nr_pinned);
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 78c84bee7e294..6f74f3d938399 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1312,12 +1312,13 @@ vm_fault_t do_huge_pmd_wp_page(struct vm_fault *vmf, pmd_t orig_pmd)
 }
 
 /*
- * FOLL_FORCE or a forced COW break can write even to unwritable pmd's,
- * but only after we've gone through a COW cycle and they are dirty.
+ * FOLL_FORCE can write to even unwritable pmd's, but only
+ * after we've gone through a COW cycle and they are dirty.
  */
 static inline bool can_follow_write_pmd(pmd_t pmd, unsigned int flags)
 {
-	return pmd_write(pmd) || ((flags & FOLL_COW) && pmd_dirty(pmd));
+	return pmd_write(pmd) ||
+	       ((flags & FOLL_FORCE) && (flags & FOLL_COW) && pmd_dirty(pmd));
 }
 
 struct page *follow_trans_huge_pmd(struct vm_area_struct *vma,
-- 
GitLab


From 798a6b87ecd72828a6c6b5469aaa2032a57e92b7 Mon Sep 17 00:00:00 2001
From: Peter Xu <peterx@redhat.com>
Date: Fri, 21 Aug 2020 19:49:58 -0400
Subject: [PATCH 1057/1341] mm: Add PGREUSE counter

This accounts for wp_page_reuse() case, where we reused a page for COW.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/vm_event_item.h | 1 +
 mm/memory.c                   | 1 +
 mm/vmstat.c                   | 1 +
 3 files changed, 3 insertions(+)

diff --git a/include/linux/vm_event_item.h b/include/linux/vm_event_item.h
index 24fc7c3ae7d64..58d3f91baad15 100644
--- a/include/linux/vm_event_item.h
+++ b/include/linux/vm_event_item.h
@@ -30,6 +30,7 @@ enum vm_event_item { PGPGIN, PGPGOUT, PSWPIN, PSWPOUT,
 		PGFAULT, PGMAJFAULT,
 		PGLAZYFREED,
 		PGREFILL,
+		PGREUSE,
 		PGSTEAL_KSWAPD,
 		PGSTEAL_DIRECT,
 		PGSCAN_KSWAPD,
diff --git a/mm/memory.c b/mm/memory.c
index 56ae945c6845d..20d93001ef933 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2619,6 +2619,7 @@ static inline void wp_page_reuse(struct vm_fault *vmf)
 	if (ptep_set_access_flags(vma, vmf->address, vmf->pte, entry, 1))
 		update_mmu_cache(vma, vmf->address, vmf->pte);
 	pte_unmap_unlock(vmf->pte, vmf->ptl);
+	count_vm_event(PGREUSE);
 }
 
 /*
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 3fb23a21f6dd6..907a5045bfa3d 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -1198,6 +1198,7 @@ const char * const vmstat_text[] = {
 	"pglazyfreed",
 
 	"pgrefill",
+	"pgreuse",
 	"pgsteal_kswapd",
 	"pgsteal_direct",
 	"pgscan_kswapd",
-- 
GitLab


From 84b43284af40742abeb2cdd6998a4084866ba015 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Fri, 4 Sep 2020 18:27:27 +0200
Subject: [PATCH 1058/1341] ACPICA: Validate GPE blocks at init time

Some of the checks done by acpi_hw_read() and acpi_hw_write(),
which are used for accessing GPE registers, are redundant in the
specific case of GPE registers and the ones that are not redundant
can be done upfront at the initialization time so as to fail the
initialization if they are not passed instead of failing every
access to the affected GPE registers going forward (including
accesses from the SCI interrupt handler).

Modify the GPE blocks initialization code accordingly.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/acpica/achware.h  |  2 ++
 drivers/acpi/acpica/evgpeblk.c | 17 +++++++++++++++++
 drivers/acpi/acpica/hwvalid.c  | 30 ++++++++++++++++++++++++++++++
 3 files changed, 49 insertions(+)

diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h
index ebf6453d0e214..f1f644b58b153 100644
--- a/drivers/acpi/acpica/achware.h
+++ b/drivers/acpi/acpica/achware.h
@@ -73,6 +73,8 @@ acpi_status acpi_hw_read_port(acpi_io_address address, u32 *value, u32 width);
 
 acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width);
 
+acpi_status acpi_hw_validate_io_block(u64 address, u32 bit_width, u32 count);
+
 /*
  * hwgpe - GPE support
  */
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index 132adff1e1316..eb5d98757fdcd 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -317,6 +317,23 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
 		return_ACPI_STATUS(AE_OK);
 	}
 
+	/* Validate the space_ID */
+
+	if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
+	    (space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
+		ACPI_ERROR((AE_INFO,
+			    "Unsupported address space: 0x%X", space_id));
+		return_ACPI_STATUS(AE_SUPPORT);
+	}
+
+	if (space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
+		status = acpi_hw_validate_io_block(address,
+						   ACPI_GPE_REGISTER_WIDTH,
+						   register_count);
+		if (ACPI_FAILURE(status))
+			return_ACPI_STATUS(status);
+	}
+
 	/* Allocate a new GPE block */
 
 	gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info));
diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c
index 4d94861e60934..b2ca7dfd3fc92 100644
--- a/drivers/acpi/acpica/hwvalid.c
+++ b/drivers/acpi/acpica/hwvalid.c
@@ -292,3 +292,33 @@ acpi_status acpi_hw_write_port(acpi_io_address address, u32 value, u32 width)
 
 	return (AE_OK);
 }
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_validate_io_block
+ *
+ * PARAMETERS:  Address             Address of I/O port/register blobk
+ *              bit_width           Number of bits (8,16,32) in each register
+ *              count               Number of registers in the block
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Validates a block of I/O ports/registers.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_validate_io_block(u64 address, u32 bit_width, u32 count)
+{
+	acpi_status status;
+
+	while (count--) {
+		status = acpi_hw_validate_io_request((acpi_io_address)address,
+						     bit_width);
+		if (ACPI_FAILURE(status))
+			return_ACPI_STATUS(status);
+
+		address += ACPI_DIV_8(bit_width);
+	}
+
+	return_ACPI_STATUS(AE_OK);
+}
-- 
GitLab


From f06011ad6225b0f5e4246b5635c5570fa8d5fcdf Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Fri, 4 Sep 2020 18:27:43 +0200
Subject: [PATCH 1059/1341] ACPICA: Introduce acpi_hw_gpe_read() and
 acpi_hw_gpe_write()

Now that GPE blocks are validated at the initialization time, accesses
to GPE registers can be made more straightforward by ommitting all of
the redundant checks in acpi_hw_read() and acpi_hw_write() and only
invoking the OS-provided helper for the given type of access (read or
write) and the address space holding these registers.

For this reason, introduce simplified routines for accessing GPE
registers, acpi_hw_gpe_read() and acpi_hw_gpe_write(), designed in
accordance with the above observation, and modify all of the code
accessing GPE registers to use them instead of acpi_hw_read() and
acpi_hw_write(), respectively.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/acpica/achware.h  |  4 ++
 drivers/acpi/acpica/evgpe.c    |  4 +-
 drivers/acpi/acpica/evgpeblk.c |  4 +-
 drivers/acpi/acpica/hwgpe.c    | 92 ++++++++++++++++++++++++++++------
 4 files changed, 84 insertions(+), 20 deletions(-)

diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h
index f1f644b58b153..4dba7229f9c11 100644
--- a/drivers/acpi/acpica/achware.h
+++ b/drivers/acpi/acpica/achware.h
@@ -78,6 +78,10 @@ acpi_status acpi_hw_validate_io_block(u64 address, u32 bit_width, u32 count);
 /*
  * hwgpe - GPE support
  */
+acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_generic_address *reg);
+
+acpi_status acpi_hw_gpe_write(u64 value, struct acpi_generic_address *reg);
+
 u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info);
 
 acpi_status
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 3e39907fedd9f..06b9c8dd11c96 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -656,14 +656,14 @@ acpi_ev_detect_gpe(struct acpi_namespace_node *gpe_device,
 
 	/* GPE currently enabled (enable bit == 1)? */
 
-	status = acpi_hw_read(&enable_reg, &gpe_register_info->enable_address);
+	status = acpi_hw_gpe_read(&enable_reg, &gpe_register_info->enable_address);
 	if (ACPI_FAILURE(status)) {
 		goto error_exit;
 	}
 
 	/* GPE currently active (status bit == 1)? */
 
-	status = acpi_hw_read(&status_reg, &gpe_register_info->status_address);
+	status = acpi_hw_gpe_read(&status_reg, &gpe_register_info->status_address);
 	if (ACPI_FAILURE(status)) {
 		goto error_exit;
 	}
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index eb5d98757fdcd..150c916dca5e3 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -251,14 +251,14 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
 
 		/* Disable all GPEs within this register */
 
-		status = acpi_hw_write(0x00, &this_register->enable_address);
+		status = acpi_hw_gpe_write(0x00, &this_register->enable_address);
 		if (ACPI_FAILURE(status)) {
 			goto error_exit;
 		}
 
 		/* Clear any pending GPE events within this register */
 
-		status = acpi_hw_write(0xFF, &this_register->status_address);
+		status = acpi_hw_gpe_write(0xFF, &this_register->status_address);
 		if (ACPI_FAILURE(status)) {
 			goto error_exit;
 		}
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
index 49c46d4dd070a..6cc88524839d6 100644
--- a/drivers/acpi/acpica/hwgpe.c
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -24,6 +24,66 @@ static acpi_status
 acpi_hw_gpe_enable_write(u8 enable_mask,
 			 struct acpi_gpe_register_info *gpe_register_info);
 
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_gpe_read
+ *
+ * PARAMETERS:  value               - Where the value is returned
+ *              reg                 - GAS register structure
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Read from a GPE register in either memory or IO space.
+ *
+ * LIMITATIONS: <These limitations also apply to acpi_hw_gpe_write>
+ *      space_ID must be system_memory or system_IO.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_generic_address *reg)
+{
+	acpi_status status;
+	u32 value32;
+
+	if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+		return acpi_os_read_memory((acpi_physical_address)reg->address,
+					    value, ACPI_GPE_REGISTER_WIDTH);
+	}
+
+	status = acpi_os_read_port((acpi_io_address)reg->address,
+				   &value32, ACPI_GPE_REGISTER_WIDTH);
+	if (ACPI_FAILURE(status))
+		return_ACPI_STATUS(status);
+
+	*value = (u64)value32;
+
+	return_ACPI_STATUS(AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION:    acpi_hw_gpe_write
+ *
+ * PARAMETERS:  value               - Value to be written
+ *              reg                 - GAS register structure
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Write to a GPE register in either memory or IO space.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_gpe_write(u64 value, struct acpi_generic_address *reg)
+{
+	if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+		return acpi_os_write_memory((acpi_physical_address)reg->address,
+					    value, ACPI_GPE_REGISTER_WIDTH);
+	}
+
+	return acpi_os_write_port((acpi_io_address)reg->address, (u32)value,
+				  ACPI_GPE_REGISTER_WIDTH);
+}
+
 /******************************************************************************
  *
  * FUNCTION:	acpi_hw_get_gpe_register_bit
@@ -79,7 +139,8 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
 
 	/* Get current value of the enable register that contains this GPE */
 
-	status = acpi_hw_read(&enable_mask, &gpe_register_info->enable_address);
+	status = acpi_hw_gpe_read(&enable_mask,
+				  &gpe_register_info->enable_address);
 	if (ACPI_FAILURE(status)) {
 		return (status);
 	}
@@ -118,9 +179,8 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
 
 		/* Write the updated enable mask */
 
-		status =
-		    acpi_hw_write(enable_mask,
-				  &gpe_register_info->enable_address);
+		status = acpi_hw_gpe_write(enable_mask,
+					   &gpe_register_info->enable_address);
 	}
 	return (status);
 }
@@ -158,8 +218,8 @@ acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info *gpe_event_info)
 	 */
 	register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
 
-	status =
-	    acpi_hw_write(register_bit, &gpe_register_info->status_address);
+	status = acpi_hw_gpe_write(register_bit,
+				   &gpe_register_info->status_address);
 	return (status);
 }
 
@@ -227,7 +287,7 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
 
 	/* GPE currently enabled (enable bit == 1)? */
 
-	status = acpi_hw_read(&in_byte, &gpe_register_info->enable_address);
+	status = acpi_hw_gpe_read(&in_byte, &gpe_register_info->enable_address);
 	if (ACPI_FAILURE(status)) {
 		return (status);
 	}
@@ -238,7 +298,7 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
 
 	/* GPE currently active (status bit == 1)? */
 
-	status = acpi_hw_read(&in_byte, &gpe_register_info->status_address);
+	status = acpi_hw_gpe_read(&in_byte, &gpe_register_info->status_address);
 	if (ACPI_FAILURE(status)) {
 		return (status);
 	}
@@ -274,7 +334,8 @@ acpi_hw_gpe_enable_write(u8 enable_mask,
 
 	gpe_register_info->enable_mask = enable_mask;
 
-	status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
+	status = acpi_hw_gpe_write(enable_mask,
+				   &gpe_register_info->enable_address);
 	return (status);
 }
 
@@ -341,9 +402,8 @@ acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
 
 		/* Clear status on all GPEs in this register */
 
-		status =
-		    acpi_hw_write(0xFF,
-				  &gpe_block->register_info[i].status_address);
+		status = acpi_hw_gpe_write(0xFF,
+					   &gpe_block->register_info[i].status_address);
 		if (ACPI_FAILURE(status)) {
 			return (status);
 		}
@@ -481,14 +541,14 @@ acpi_hw_get_gpe_block_status(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
 	for (i = 0; i < gpe_block->register_count; i++) {
 		gpe_register_info = &gpe_block->register_info[i];
 
-		status = acpi_hw_read(&in_enable,
-				      &gpe_register_info->enable_address);
+		status = acpi_hw_gpe_read(&in_enable,
+					  &gpe_register_info->enable_address);
 		if (ACPI_FAILURE(status)) {
 			continue;
 		}
 
-		status = acpi_hw_read(&in_status,
-				      &gpe_register_info->status_address);
+		status = acpi_hw_gpe_read(&in_status,
+					  &gpe_register_info->status_address);
 		if (ACPI_FAILURE(status)) {
 			continue;
 		}
-- 
GitLab


From 9da8e9ac171438525e4c1c377609818ef1a6237b Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Fri, 4 Sep 2020 18:27:52 +0200
Subject: [PATCH 1060/1341] ACPICA: Introduce special struct type for GPE
 register addresses

Notice that the bit_width, bit_offset and access_width fields in
struct acpi_generic_address are not used during GPE register
accesses any more, so introduce a simplified address structure
type, struct acpi_gpe_address, to represent addresses of GPE
registers and use it instead of struct acpi_generic_address in
struct acpi_gpe_register_info.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/acpica/achware.h  |  4 ++--
 drivers/acpi/acpica/aclocal.h  | 11 +++++++++--
 drivers/acpi/acpica/evgpeblk.c |  6 ------
 drivers/acpi/acpica/hwgpe.c    |  8 ++++----
 4 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/drivers/acpi/acpica/achware.h b/drivers/acpi/acpica/achware.h
index 4dba7229f9c11..6ab92e28330d5 100644
--- a/drivers/acpi/acpica/achware.h
+++ b/drivers/acpi/acpica/achware.h
@@ -78,9 +78,9 @@ acpi_status acpi_hw_validate_io_block(u64 address, u32 bit_width, u32 count);
 /*
  * hwgpe - GPE support
  */
-acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_generic_address *reg);
+acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_gpe_address *reg);
 
-acpi_status acpi_hw_gpe_write(u64 value, struct acpi_generic_address *reg);
+acpi_status acpi_hw_gpe_write(u64 value, struct acpi_gpe_address *reg);
 
 u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info);
 
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h
index af58cd2dc9d37..f83b98fa13ac6 100644
--- a/drivers/acpi/acpica/aclocal.h
+++ b/drivers/acpi/acpica/aclocal.h
@@ -454,11 +454,18 @@ struct acpi_gpe_event_info {
 	u8 disable_for_dispatch;	/* Masked during dispatching */
 };
 
+/* GPE register address */
+
+struct acpi_gpe_address {
+	u8 space_id;	/* Address space where the register exists */
+	u64 address;	/* 64-bit address of the register */
+};
+
 /* Information about a GPE register pair, one per each status/enable pair in an array */
 
 struct acpi_gpe_register_info {
-	struct acpi_generic_address status_address;	/* Address of status reg */
-	struct acpi_generic_address enable_address;	/* Address of enable reg */
+	struct acpi_gpe_address status_address;	/* Address of status reg */
+	struct acpi_gpe_address enable_address;	/* Address of enable reg */
 	u16 base_gpe_number;	/* Base GPE number for this register */
 	u8 enable_for_wake;	/* GPEs to keep enabled when sleeping */
 	u8 enable_for_run;	/* GPEs to keep enabled when running */
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index 150c916dca5e3..f5298be4273a8 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -233,12 +233,6 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
 
 		this_register->status_address.space_id = gpe_block->space_id;
 		this_register->enable_address.space_id = gpe_block->space_id;
-		this_register->status_address.bit_width =
-		    ACPI_GPE_REGISTER_WIDTH;
-		this_register->enable_address.bit_width =
-		    ACPI_GPE_REGISTER_WIDTH;
-		this_register->status_address.bit_offset = 0;
-		this_register->enable_address.bit_offset = 0;
 
 		/* Init the event_info for each GPE within this register */
 
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
index 6cc88524839d6..a0e71f34c77ab 100644
--- a/drivers/acpi/acpica/hwgpe.c
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -29,7 +29,7 @@ acpi_hw_gpe_enable_write(u8 enable_mask,
  * FUNCTION:    acpi_hw_gpe_read
  *
  * PARAMETERS:  value               - Where the value is returned
- *              reg                 - GAS register structure
+ *              reg                 - GPE register structure
  *
  * RETURN:      Status
  *
@@ -40,7 +40,7 @@ acpi_hw_gpe_enable_write(u8 enable_mask,
  *
  ******************************************************************************/
 
-acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_generic_address *reg)
+acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_gpe_address *reg)
 {
 	acpi_status status;
 	u32 value32;
@@ -65,7 +65,7 @@ acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_generic_address *reg)
  * FUNCTION:    acpi_hw_gpe_write
  *
  * PARAMETERS:  value               - Value to be written
- *              reg                 - GAS register structure
+ *              reg                 - GPE register structure
  *
  * RETURN:      Status
  *
@@ -73,7 +73,7 @@ acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_generic_address *reg)
  *
  ******************************************************************************/
 
-acpi_status acpi_hw_gpe_write(u64 value, struct acpi_generic_address *reg)
+acpi_status acpi_hw_gpe_write(u64 value, struct acpi_gpe_address *reg)
 {
 	if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
 		return acpi_os_write_memory((acpi_physical_address)reg->address,
-- 
GitLab


From acf69c946233259ab4d64f8869d4037a198c7f06 Mon Sep 17 00:00:00 2001
From: Or Cohen <orcohen@paloaltonetworks.com>
Date: Thu, 3 Sep 2020 21:05:28 -0700
Subject: [PATCH 1061/1341] net/packet: fix overflow in tpacket_rcv

Using tp_reserve to calculate netoff can overflow as
tp_reserve is unsigned int and netoff is unsigned short.

This may lead to macoff receving a smaller value then
sizeof(struct virtio_net_hdr), and if po->has_vnet_hdr
is set, an out-of-bounds write will occur when
calling virtio_net_hdr_from_skb.

The bug is fixed by converting netoff to unsigned int
and checking if it exceeds USHRT_MAX.

This addresses CVE-2020-14386

Fixes: 8913336a7e8d ("packet: add PACKET_RESERVE sockopt")
Signed-off-by: Or Cohen <orcohen@paloaltonetworks.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 net/packet/af_packet.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index da8254e680f94..2b33e977a9059 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2170,7 +2170,8 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
 	int skb_len = skb->len;
 	unsigned int snaplen, res;
 	unsigned long status = TP_STATUS_USER;
-	unsigned short macoff, netoff, hdrlen;
+	unsigned short macoff, hdrlen;
+	unsigned int netoff;
 	struct sk_buff *copy_skb = NULL;
 	struct timespec64 ts;
 	__u32 ts_status;
@@ -2239,6 +2240,10 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
 		}
 		macoff = netoff - maclen;
 	}
+	if (netoff > USHRT_MAX) {
+		atomic_inc(&po->tp_drops);
+		goto drop_n_restore;
+	}
 	if (po->tp_version <= TPACKET_V2) {
 		if (macoff + snaplen > po->rx_ring.frame_size) {
 			if (po->copy_thresh &&
-- 
GitLab


From 34221545d2069dc947131f42392fd4cebabe1b39 Mon Sep 17 00:00:00 2001
From: Jordan Crouse <jcrouse@codeaurora.org>
Date: Thu, 3 Sep 2020 20:03:10 -0600
Subject: [PATCH 1062/1341] drm/msm: Split the a5xx preemption record

The main a5xx preemption record can be marked as privileged to
protect it from user access but the counters storage needs to be
remain unprivileged. Split the buffers and mark the critical memory
as privileged.

Cc: stable@vger.kernel.org
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a5xx_gpu.h     |  1 +
 drivers/gpu/drm/msm/adreno/a5xx_preempt.c | 25 ++++++++++++++++++-----
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.h b/drivers/gpu/drm/msm/adreno/a5xx_gpu.h
index 54868d4e3958f..1e5b1a15a70f0 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.h
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.h
@@ -31,6 +31,7 @@ struct a5xx_gpu {
 	struct msm_ringbuffer *next_ring;
 
 	struct drm_gem_object *preempt_bo[MSM_GPU_MAX_RINGS];
+	struct drm_gem_object *preempt_counters_bo[MSM_GPU_MAX_RINGS];
 	struct a5xx_preempt_record *preempt[MSM_GPU_MAX_RINGS];
 	uint64_t preempt_iova[MSM_GPU_MAX_RINGS];
 
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_preempt.c b/drivers/gpu/drm/msm/adreno/a5xx_preempt.c
index 9cf9353a7ff11..9f3fe177b00e9 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_preempt.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_preempt.c
@@ -226,19 +226,31 @@ static int preempt_init_ring(struct a5xx_gpu *a5xx_gpu,
 	struct adreno_gpu *adreno_gpu = &a5xx_gpu->base;
 	struct msm_gpu *gpu = &adreno_gpu->base;
 	struct a5xx_preempt_record *ptr;
-	struct drm_gem_object *bo = NULL;
-	u64 iova = 0;
+	void *counters;
+	struct drm_gem_object *bo = NULL, *counters_bo = NULL;
+	u64 iova = 0, counters_iova = 0;
 
 	ptr = msm_gem_kernel_new(gpu->dev,
 		A5XX_PREEMPT_RECORD_SIZE + A5XX_PREEMPT_COUNTER_SIZE,
-		MSM_BO_UNCACHED, gpu->aspace, &bo, &iova);
+		MSM_BO_UNCACHED | MSM_BO_MAP_PRIV, gpu->aspace, &bo, &iova);
 
 	if (IS_ERR(ptr))
 		return PTR_ERR(ptr);
 
+	/* The buffer to store counters needs to be unprivileged */
+	counters = msm_gem_kernel_new(gpu->dev,
+		A5XX_PREEMPT_COUNTER_SIZE,
+		MSM_BO_UNCACHED, gpu->aspace, &counters_bo, &counters_iova);
+	if (IS_ERR(counters)) {
+		msm_gem_kernel_put(bo, gpu->aspace, true);
+		return PTR_ERR(counters);
+	}
+
 	msm_gem_object_set_name(bo, "preempt");
+	msm_gem_object_set_name(counters_bo, "preempt_counters");
 
 	a5xx_gpu->preempt_bo[ring->id] = bo;
+	a5xx_gpu->preempt_counters_bo[ring->id] = counters_bo;
 	a5xx_gpu->preempt_iova[ring->id] = iova;
 	a5xx_gpu->preempt[ring->id] = ptr;
 
@@ -249,7 +261,7 @@ static int preempt_init_ring(struct a5xx_gpu *a5xx_gpu,
 	ptr->data = 0;
 	ptr->cntl = MSM_GPU_RB_CNTL_DEFAULT;
 	ptr->rptr_addr = rbmemptr(ring, rptr);
-	ptr->counter = iova + A5XX_PREEMPT_RECORD_SIZE;
+	ptr->counter = counters_iova;
 
 	return 0;
 }
@@ -260,8 +272,11 @@ void a5xx_preempt_fini(struct msm_gpu *gpu)
 	struct a5xx_gpu *a5xx_gpu = to_a5xx_gpu(adreno_gpu);
 	int i;
 
-	for (i = 0; i < gpu->nr_rings; i++)
+	for (i = 0; i < gpu->nr_rings; i++) {
 		msm_gem_kernel_put(a5xx_gpu->preempt_bo[i], gpu->aspace, true);
+		msm_gem_kernel_put(a5xx_gpu->preempt_counters_bo[i],
+			gpu->aspace, true);
+	}
 }
 
 void a5xx_preempt_init(struct msm_gpu *gpu)
-- 
GitLab


From 604234f33658cdd72f686be405a99646b397d0b3 Mon Sep 17 00:00:00 2001
From: Jordan Crouse <jcrouse@codeaurora.org>
Date: Thu, 3 Sep 2020 20:03:11 -0600
Subject: [PATCH 1063/1341] drm/msm: Enable expanded apriv support for a650

a650 supports expanded apriv support that allows us to map critical buffers
(ringbuffer and memstore) as as privileged to protect them from corruption.

Cc: stable@vger.kernel.org
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c |  6 +++++-
 drivers/gpu/drm/msm/msm_gpu.c         |  2 +-
 drivers/gpu/drm/msm/msm_gpu.h         | 11 +++++++++++
 drivers/gpu/drm/msm/msm_ringbuffer.c  |  4 ++--
 4 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index c5a3e4d4c0078..406efaac95a7c 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -678,7 +678,8 @@ static int a6xx_hw_init(struct msm_gpu *gpu)
 			A6XX_PROTECT_RDONLY(0x980, 0x4));
 	gpu_write(gpu, REG_A6XX_CP_PROTECT(25), A6XX_PROTECT_RW(0xa630, 0x0));
 
-	if (adreno_is_a650(adreno_gpu)) {
+	/* Enable expanded apriv for targets that support it */
+	if (gpu->hw_apriv) {
 		gpu_write(gpu, REG_A6XX_CP_APRIV_CNTL,
 			(1 << 6) | (1 << 5) | (1 << 3) | (1 << 2) | (1 << 1));
 	}
@@ -1056,6 +1057,9 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
 	adreno_gpu->registers = NULL;
 	adreno_gpu->reg_offsets = a6xx_register_offsets;
 
+	if (adreno_is_a650(adreno_gpu))
+		adreno_gpu->base.hw_apriv = true;
+
 	ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 1);
 	if (ret) {
 		a6xx_destroy(&(a6xx_gpu->base.base));
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index d5645472b25da..57ddc9438351e 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -908,7 +908,7 @@ int msm_gpu_init(struct drm_device *drm, struct platform_device *pdev,
 
 	memptrs = msm_gem_kernel_new(drm,
 		sizeof(struct msm_rbmemptrs) * nr_rings,
-		MSM_BO_UNCACHED, gpu->aspace, &gpu->memptrs_bo,
+		check_apriv(gpu, MSM_BO_UNCACHED), gpu->aspace, &gpu->memptrs_bo,
 		&memptrs_iova);
 
 	if (IS_ERR(memptrs)) {
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index 0db117a7339b6..37cffac4cbe34 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -15,6 +15,7 @@
 #include "msm_drv.h"
 #include "msm_fence.h"
 #include "msm_ringbuffer.h"
+#include "msm_gem.h"
 
 struct msm_gem_submit;
 struct msm_gpu_perfcntr;
@@ -139,6 +140,8 @@ struct msm_gpu {
 	} devfreq;
 
 	struct msm_gpu_state *crashstate;
+	/* True if the hardware supports expanded apriv (a650 and newer) */
+	bool hw_apriv;
 };
 
 /* It turns out that all targets use the same ringbuffer size */
@@ -327,4 +330,12 @@ static inline void msm_gpu_crashstate_put(struct msm_gpu *gpu)
 	mutex_unlock(&gpu->dev->struct_mutex);
 }
 
+/*
+ * Simple macro to semi-cleanly add the MAP_PRIV flag for targets that can
+ * support expanded privileges
+ */
+#define check_apriv(gpu, flags) \
+	(((gpu)->hw_apriv ? MSM_BO_MAP_PRIV : 0) | (flags))
+
+
 #endif /* __MSM_GPU_H__ */
diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.c b/drivers/gpu/drm/msm/msm_ringbuffer.c
index 39ecb5a18431e..935bf9b1d9418 100644
--- a/drivers/gpu/drm/msm/msm_ringbuffer.c
+++ b/drivers/gpu/drm/msm/msm_ringbuffer.c
@@ -27,8 +27,8 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
 	ring->id = id;
 
 	ring->start = msm_gem_kernel_new(gpu->dev, MSM_GPU_RINGBUFFER_SZ,
-		MSM_BO_WC | MSM_BO_GPU_READONLY, gpu->aspace, &ring->bo,
-		&ring->iova);
+		check_apriv(gpu, MSM_BO_WC | MSM_BO_GPU_READONLY),
+		gpu->aspace, &ring->bo, &ring->iova);
 
 	if (IS_ERR(ring->start)) {
 		ret = PTR_ERR(ring->start);
-- 
GitLab


From 7b3f3948c8b7053d771acc9f79810cc410f5e2e0 Mon Sep 17 00:00:00 2001
From: Jordan Crouse <jcrouse@codeaurora.org>
Date: Thu, 3 Sep 2020 20:03:12 -0600
Subject: [PATCH 1064/1341] drm/msm: Disable preemption on all 5xx targets

Temporarily disable preemption on a5xx targets pending some improvements
to protect the RPTR shadow from being corrupted.

Cc: stable@vger.kernel.org
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index 9e63a190642cc..e718f964d5902 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -1511,7 +1511,8 @@ struct msm_gpu *a5xx_gpu_init(struct drm_device *dev)
 
 	check_speed_bin(&pdev->dev);
 
-	ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 4);
+	/* Restricting nr_rings to 1 to temporarily disable preemption */
+	ret = adreno_gpu_init(dev, pdev, adreno_gpu, &funcs, 1);
 	if (ret) {
 		a5xx_destroy(&(a5xx_gpu->base.base));
 		return ERR_PTR(ret);
-- 
GitLab


From f6828e0c4045f03f9cf2df6c2a768102641183f4 Mon Sep 17 00:00:00 2001
From: Jordan Crouse <jcrouse@codeaurora.org>
Date: Thu, 3 Sep 2020 20:03:13 -0600
Subject: [PATCH 1065/1341] drm/msm: Disable the RPTR shadow

Disable the RPTR shadow across all targets. It will be selectively
re-enabled later for targets that need it.

Cc: stable@vger.kernel.org
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
 drivers/gpu/drm/msm/adreno/a2xx_gpu.c   |  5 +++++
 drivers/gpu/drm/msm/adreno/a3xx_gpu.c   | 10 +++++++++
 drivers/gpu/drm/msm/adreno/a4xx_gpu.c   | 10 +++++++++
 drivers/gpu/drm/msm/adreno/a5xx_gpu.c   | 11 ++++++++--
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c   |  7 +++++++
 drivers/gpu/drm/msm/adreno/adreno_gpu.c | 27 ++-----------------------
 6 files changed, 43 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/msm/adreno/a2xx_gpu.c b/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
index 6021f8d9efd1f..48fa49f69d6d0 100644
--- a/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a2xx_gpu.c
@@ -164,6 +164,11 @@ static int a2xx_hw_init(struct msm_gpu *gpu)
 	if (ret)
 		return ret;
 
+	gpu_write(gpu, REG_AXXX_CP_RB_CNTL,
+		MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
+	gpu_write(gpu, REG_AXXX_CP_RB_BASE, lower_32_bits(gpu->rb[0]->iova));
+
 	/* NOTE: PM4/micro-engine firmware registers look to be the same
 	 * for a2xx and a3xx.. we could possibly push that part down to
 	 * adreno_gpu base class.  Or push both PM4 and PFP but
diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
index 0a5ea9f56cb88..f6471145a7a60 100644
--- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
@@ -211,6 +211,16 @@ static int a3xx_hw_init(struct msm_gpu *gpu)
 	if (ret)
 		return ret;
 
+	/*
+	 * Use the default ringbuffer size and block size but disable the RPTR
+	 * shadow
+	 */
+	gpu_write(gpu, REG_AXXX_CP_RB_CNTL,
+		MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
+	/* Set the ringbuffer address */
+	gpu_write(gpu, REG_AXXX_CP_RB_BASE, lower_32_bits(gpu->rb[0]->iova));
+
 	/* setup access protection: */
 	gpu_write(gpu, REG_A3XX_CP_PROTECT_CTRL, 0x00000007);
 
diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
index b9b26b2bf9c54..9547536006254 100644
--- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
@@ -267,6 +267,16 @@ static int a4xx_hw_init(struct msm_gpu *gpu)
 	if (ret)
 		return ret;
 
+	/*
+	 * Use the default ringbuffer size and block size but disable the RPTR
+	 * shadow
+	 */
+	gpu_write(gpu, REG_A4XX_CP_RB_CNTL,
+		MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
+	/* Set the ringbuffer address */
+	gpu_write(gpu, REG_A4XX_CP_RB_BASE, lower_32_bits(gpu->rb[0]->iova));
+
 	/* Load PM4: */
 	ptr = (uint32_t *)(adreno_gpu->fw[ADRENO_FW_PM4]->data);
 	len = adreno_gpu->fw[ADRENO_FW_PM4]->size / 4;
diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
index e718f964d5902..ce3c0b5c167b5 100644
--- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
@@ -703,8 +703,6 @@ static int a5xx_hw_init(struct msm_gpu *gpu)
 	if (ret)
 		return ret;
 
-	a5xx_preempt_hw_init(gpu);
-
 	if (!adreno_is_a510(adreno_gpu))
 		a5xx_gpmu_ucode_init(gpu);
 
@@ -712,6 +710,15 @@ static int a5xx_hw_init(struct msm_gpu *gpu)
 	if (ret)
 		return ret;
 
+	/* Set the ringbuffer address */
+	gpu_write64(gpu, REG_A5XX_CP_RB_BASE, REG_A5XX_CP_RB_BASE_HI,
+		gpu->rb[0]->iova);
+
+	gpu_write(gpu, REG_A5XX_CP_RB_CNTL,
+		MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
+	a5xx_preempt_hw_init(gpu);
+
 	/* Disable the interrupts through the initial bringup stage */
 	gpu_write(gpu, REG_A5XX_RBBM_INT_0_MASK, A5XX_INT_MASK);
 
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 406efaac95a7c..74bc27eb4203c 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -695,6 +695,13 @@ static int a6xx_hw_init(struct msm_gpu *gpu)
 	if (ret)
 		goto out;
 
+	/* Set the ringbuffer address */
+	gpu_write64(gpu, REG_A6XX_CP_RB_BASE, REG_A6XX_CP_RB_BASE_HI,
+		gpu->rb[0]->iova);
+
+	gpu_write(gpu, REG_A6XX_CP_RB_CNTL,
+		MSM_GPU_RB_CNTL_DEFAULT | AXXX_CP_RB_CNTL_NO_UPDATE);
+
 	/* Always come up on rb 0 */
 	a6xx_gpu->cur_ring = gpu->rb[0];
 
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index d2dbb6968cba4..459f10a3710b7 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -400,26 +400,6 @@ int adreno_hw_init(struct msm_gpu *gpu)
 		ring->memptrs->rptr = 0;
 	}
 
-	/*
-	 * Setup REG_CP_RB_CNTL.  The same value is used across targets (with
-	 * the excpetion of A430 that disables the RPTR shadow) - the cacluation
-	 * for the ringbuffer size and block size is moved to msm_gpu.h for the
-	 * pre-processor to deal with and the A430 variant is ORed in here
-	 */
-	adreno_gpu_write(adreno_gpu, REG_ADRENO_CP_RB_CNTL,
-		MSM_GPU_RB_CNTL_DEFAULT |
-		(adreno_is_a430(adreno_gpu) ? AXXX_CP_RB_CNTL_NO_UPDATE : 0));
-
-	/* Setup ringbuffer address - use ringbuffer[0] for GPU init */
-	adreno_gpu_write64(adreno_gpu, REG_ADRENO_CP_RB_BASE,
-		REG_ADRENO_CP_RB_BASE_HI, gpu->rb[0]->iova);
-
-	if (!adreno_is_a430(adreno_gpu)) {
-		adreno_gpu_write64(adreno_gpu, REG_ADRENO_CP_RB_RPTR_ADDR,
-			REG_ADRENO_CP_RB_RPTR_ADDR_HI,
-			rbmemptr(gpu->rb[0], rptr));
-	}
-
 	return 0;
 }
 
@@ -427,11 +407,8 @@ int adreno_hw_init(struct msm_gpu *gpu)
 static uint32_t get_rptr(struct adreno_gpu *adreno_gpu,
 		struct msm_ringbuffer *ring)
 {
-	if (adreno_is_a430(adreno_gpu))
-		return ring->memptrs->rptr = adreno_gpu_read(
-			adreno_gpu, REG_ADRENO_CP_RB_RPTR);
-	else
-		return ring->memptrs->rptr;
+	return ring->memptrs->rptr = adreno_gpu_read(
+		adreno_gpu, REG_ADRENO_CP_RB_RPTR);
 }
 
 struct msm_ringbuffer *adreno_active_ring(struct msm_gpu *gpu)
-- 
GitLab


From 66138621f2473e29625dfa6bb229872203b71b90 Mon Sep 17 00:00:00 2001
From: Robin Gong <yibin.gong@nxp.com>
Date: Tue, 1 Sep 2020 18:21:49 +0800
Subject: [PATCH 1066/1341] arm64: dts: imx8mp: correct sdma1 clk setting

Correct sdma1 ahb clk, otherwise wrong 1:1 clk ratio will be chosed so
that sdma1 function broken. sdma1 should use 1:2 clk, while sdma2/3 use
1:1.

Fixes: 6d9b8d20431f ("arm64: dts: freescale: Add i.MX8MP dtsi support")
Cc: <stable@vger.kernel.org>
Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm64/boot/dts/freescale/imx8mp.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
index 9de2aa1c573c7..a5154f13a18e9 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
@@ -702,7 +702,7 @@ sdma1: dma-controller@30bd0000 {
 				reg = <0x30bd0000 0x10000>;
 				interrupts = <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&clk IMX8MP_CLK_SDMA1_ROOT>,
-					 <&clk IMX8MP_CLK_SDMA1_ROOT>;
+					 <&clk IMX8MP_CLK_AHB>;
 				clock-names = "ipg", "ahb";
 				#dma-cells = <3>;
 				fsl,sdma-ram-script-name = "imx/sdma/sdma-imx7d.bin";
-- 
GitLab


From 3ee99f6a2379eca87ab11122b7e9abd68f3441e2 Mon Sep 17 00:00:00 2001
From: Fugang Duan <fugang.duan@nxp.com>
Date: Thu, 3 Sep 2020 18:05:21 +0800
Subject: [PATCH 1067/1341] ARM: dts: imx6sx: fix the pad QSPI1B_SCLK mux mode
 for uart3

The pad QSPI1B_SCLK mux mode 0x1 is for function UART3_DTE_TX,
correct the mux mode.

Fixes: 743636f25f1d ("ARM: dts: imx: add pin function header for imx6sx")
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
---
 arch/arm/boot/dts/imx6sx-pinfunc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6sx-pinfunc.h b/arch/arm/boot/dts/imx6sx-pinfunc.h
index 0b02c7e60c174..f4dc46207954c 100644
--- a/arch/arm/boot/dts/imx6sx-pinfunc.h
+++ b/arch/arm/boot/dts/imx6sx-pinfunc.h
@@ -1026,7 +1026,7 @@
 #define MX6SX_PAD_QSPI1B_DQS__SIM_M_HADDR_15                      0x01B0 0x04F8 0x0000 0x7 0x0
 #define MX6SX_PAD_QSPI1B_SCLK__QSPI1_B_SCLK                       0x01B4 0x04FC 0x0000 0x0 0x0
 #define MX6SX_PAD_QSPI1B_SCLK__UART3_DCE_RX                       0x01B4 0x04FC 0x0840 0x1 0x4
-#define MX6SX_PAD_QSPI1B_SCLK__UART3_DTE_TX                       0x01B4 0x04FC 0x0000 0x0 0x0
+#define MX6SX_PAD_QSPI1B_SCLK__UART3_DTE_TX                       0x01B4 0x04FC 0x0000 0x1 0x0
 #define MX6SX_PAD_QSPI1B_SCLK__ECSPI3_SCLK                        0x01B4 0x04FC 0x0730 0x2 0x1
 #define MX6SX_PAD_QSPI1B_SCLK__ESAI_RX_HF_CLK                     0x01B4 0x04FC 0x0780 0x3 0x2
 #define MX6SX_PAD_QSPI1B_SCLK__CSI1_DATA_16                       0x01B4 0x04FC 0x06DC 0x4 0x1
-- 
GitLab


From 644c9f40cf71969f29add32f32349e71d4995c0b Mon Sep 17 00:00:00 2001
From: Chuck Lever <chuck.lever@oracle.com>
Date: Fri, 4 Sep 2020 17:39:12 -0400
Subject: [PATCH 1068/1341] NFS: Zero-stateid SETATTR should first return
 delegation

If a write delegation isn't available, the Linux NFS client uses
a zero-stateid when performing a SETATTR.

NFSv4.0 provides no mechanism for an NFS server to match such a
request to a particular client. It recalls all delegations for that
file, even delegations held by the client issuing the request. If
that client happens to hold a read delegation, the server will
recall it immediately, resulting in an NFS4ERR_DELAY/CB_RECALL/
DELEGRETURN sequence.

Optimize out this pipeline bubble by having the client return any
delegations it may hold on a file before it issues a
SETATTR(zero-stateid) on that file.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/nfs4proc.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 4a6cfb497103a..3e824110b4703 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3293,8 +3293,10 @@ static int _nfs4_do_setattr(struct inode *inode,
 
 	/* Servers should only apply open mode checks for file size changes */
 	truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
-	if (!truncate)
+	if (!truncate) {
+		nfs4_inode_make_writeable(inode);
 		goto zero_stateid;
+	}
 
 	if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) {
 		/* Use that stateid */
-- 
GitLab


From 8c6b6c793ed32b8f9770ebcdf1ba99af423c303b Mon Sep 17 00:00:00 2001
From: "J. Bruce Fields" <bfields@redhat.com>
Date: Sat, 5 Sep 2020 10:03:26 -0400
Subject: [PATCH 1069/1341] SUNRPC: stop printk reading past end of string

Since p points at raw xdr data, there's no guarantee that it's NULL
terminated, so we should give a length.  And probably escape any special
characters too.

Reported-by: Zhi Li <yieli@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 net/sunrpc/rpcb_clnt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index c27123e6ba80c..4a67685c83eb4 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -982,8 +982,8 @@ static int rpcb_dec_getaddr(struct rpc_rqst *req, struct xdr_stream *xdr,
 	p = xdr_inline_decode(xdr, len);
 	if (unlikely(p == NULL))
 		goto out_fail;
-	dprintk("RPC: %5u RPCB_%s reply: %s\n", req->rq_task->tk_pid,
-			req->rq_task->tk_msg.rpc_proc->p_name, (char *)p);
+	dprintk("RPC: %5u RPCB_%s reply: %*pE\n", req->rq_task->tk_pid,
+			req->rq_task->tk_msg.rpc_proc->p_name, len, (char *)p);
 
 	if (rpc_uaddr2sockaddr(req->rq_xprt->xprt_net, (char *)p, len,
 				sap, sizeof(address)) == 0)
-- 
GitLab


From c183edff33fdcd639d222a8f473bf44602adc655 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Fri, 4 Sep 2020 22:36:52 -0600
Subject: [PATCH 1070/1341] io_uring: fix explicit async read/write mapping for
 large segments

If we exceed UIO_FASTIOV, we don't handle the transition correctly
between an allocated vec for requests that are queued with IOSQE_ASYNC.
Store the iovec appropriately and re-set it in the iter iov in case
it changed.

Fixes: ff6165b2d7f6 ("io_uring: retain iov_iter state over io_read/io_write calls")
Reported-by: Nick Hill <nick@nickhill.org>
Tested-by: Norman Maurer <norman.maurer@googlemail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 64c5a52fad126..f703182df2d4d 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -2980,14 +2980,15 @@ static inline int io_rw_prep_async(struct io_kiocb *req, int rw,
 				   bool force_nonblock)
 {
 	struct io_async_rw *iorw = &req->io->rw;
+	struct iovec *iov;
 	ssize_t ret;
 
-	iorw->iter.iov = iorw->fast_iov;
-	ret = __io_import_iovec(rw, req, (struct iovec **) &iorw->iter.iov,
-				&iorw->iter, !force_nonblock);
+	iorw->iter.iov = iov = iorw->fast_iov;
+	ret = __io_import_iovec(rw, req, &iov, &iorw->iter, !force_nonblock);
 	if (unlikely(ret < 0))
 		return ret;
 
+	iorw->iter.iov = iov;
 	io_req_map_rw(req, iorw->iter.iov, iorw->fast_iov, &iorw->iter);
 	return 0;
 }
-- 
GitLab


From d2b86100245080cfdf1e95e9e07477474c1be2bd Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Wed, 29 Jul 2020 01:19:40 +0300
Subject: [PATCH 1071/1341] rapidio: Replace 'select' DMAENGINES 'with depends
 on'

Enabling a whole subsystem from a single driver 'select' is frowned
upon and won't be accepted in new drivers, that need to use 'depends on'
instead. Existing selection of DMAENGINES will then cause circular
dependencies. Replace them with a dependency.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
---
 drivers/rapidio/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rapidio/Kconfig b/drivers/rapidio/Kconfig
index e4c422d806bee..b9f8514909bf0 100644
--- a/drivers/rapidio/Kconfig
+++ b/drivers/rapidio/Kconfig
@@ -37,7 +37,7 @@ config RAPIDIO_ENABLE_RX_TX_PORTS
 config RAPIDIO_DMA_ENGINE
 	bool "DMA Engine support for RapidIO"
 	depends on RAPIDIO
-	select DMADEVICES
+	depends on DMADEVICES
 	select DMA_ENGINE
 	help
 	  Say Y here if you want to use DMA Engine frameork for RapidIO data
-- 
GitLab


From 3e8b2403545efd46c6347002e27eae4708205fd4 Mon Sep 17 00:00:00 2001
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Date: Wed, 29 Jul 2020 01:23:32 +0300
Subject: [PATCH 1072/1341] drm: xlnx: dpsub: Fix DMADEVICES Kconfig dependency

The dpsub driver uses the DMA engine API, and thus selects DMA_ENGINE to
provide that API. DMA_ENGINE depends on DMADEVICES, which can be
deselected by the user, creating a possibly unmet indirect dependency:

WARNING: unmet direct dependencies detected for DMA_ENGINE
  Depends on [n]: DMADEVICES [=n]
  Selected by [m]:
  - DRM_ZYNQMP_DPSUB [=m] && HAS_IOMEM [=y] && (ARCH_ZYNQMP || COMPILE_TEST [=y]) && COMMON_CLK [=y] && DRM [=m] && OF [=y]

Add a dependency on DMADEVICES to fix this.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
---
 drivers/gpu/drm/xlnx/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/xlnx/Kconfig b/drivers/gpu/drm/xlnx/Kconfig
index aa6cd889bd119..b52c6cdfc0b87 100644
--- a/drivers/gpu/drm/xlnx/Kconfig
+++ b/drivers/gpu/drm/xlnx/Kconfig
@@ -2,6 +2,7 @@ config DRM_ZYNQMP_DPSUB
 	tristate "ZynqMP DisplayPort Controller Driver"
 	depends on ARCH_ZYNQMP || COMPILE_TEST
 	depends on COMMON_CLK && DRM && OF
+	depends on DMADEVICES
 	select DMA_ENGINE
 	select DRM_GEM_CMA_HELPER
 	select DRM_KMS_CMA_HELPER
-- 
GitLab


From 1ef6ea0efe8e68d0299dad44c39dc6ad9e5d1f39 Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@redhat.com>
Date: Sat, 5 Sep 2020 08:12:01 -0400
Subject: [PATCH 1073/1341] ext2: don't update mtime on COW faults

When running in a dax mode, if the user maps a page with MAP_PRIVATE and
PROT_WRITE, the ext2 filesystem would incorrectly update ctime and mtime
when the user hits a COW fault.

This breaks building of the Linux kernel.  How to reproduce:

 1. extract the Linux kernel tree on dax-mounted ext2 filesystem
 2. run make clean
 3. run make -j12
 4. run make -j12

at step 4, make would incorrectly rebuild the whole kernel (although it
was already built in step 3).

The reason for the breakage is that almost all object files depend on
objtool.  When we run objtool, it takes COW page fault on its .data
section, and these faults will incorrectly update the timestamp of the
objtool binary.  The updated timestamp causes make to rebuild the whole
tree.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/ext2/file.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 60378ddf1424b..96044f5dbc0e0 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -93,8 +93,10 @@ static vm_fault_t ext2_dax_fault(struct vm_fault *vmf)
 	struct inode *inode = file_inode(vmf->vma->vm_file);
 	struct ext2_inode_info *ei = EXT2_I(inode);
 	vm_fault_t ret;
+	bool write = (vmf->flags & FAULT_FLAG_WRITE) &&
+		(vmf->vma->vm_flags & VM_SHARED);
 
-	if (vmf->flags & FAULT_FLAG_WRITE) {
+	if (write) {
 		sb_start_pagefault(inode->i_sb);
 		file_update_time(vmf->vma->vm_file);
 	}
@@ -103,7 +105,7 @@ static vm_fault_t ext2_dax_fault(struct vm_fault *vmf)
 	ret = dax_iomap_fault(vmf, PE_SIZE_PTE, NULL, NULL, &ext2_iomap_ops);
 
 	up_read(&ei->dax_sem);
-	if (vmf->flags & FAULT_FLAG_WRITE)
+	if (write)
 		sb_end_pagefault(inode->i_sb);
 	return ret;
 }
-- 
GitLab


From b17164e258e3888d376a7434415013175d637377 Mon Sep 17 00:00:00 2001
From: Mikulas Patocka <mpatocka@redhat.com>
Date: Sat, 5 Sep 2020 08:13:02 -0400
Subject: [PATCH 1074/1341] xfs: don't update mtime on COW faults

When running in a dax mode, if the user maps a page with MAP_PRIVATE and
PROT_WRITE, the xfs filesystem would incorrectly update ctime and mtime
when the user hits a COW fault.

This breaks building of the Linux kernel.  How to reproduce:

 1. extract the Linux kernel tree on dax-mounted xfs filesystem
 2. run make clean
 3. run make -j12
 4. run make -j12

at step 4, make would incorrectly rebuild the whole kernel (although it
was already built in step 3).

The reason for the breakage is that almost all object files depend on
objtool.  When we run objtool, it takes COW page fault on its .data
section, and these faults will incorrectly update the timestamp of the
objtool binary.  The updated timestamp causes make to rebuild the whole
tree.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/xfs/xfs_file.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index c31cd3be9fb24..a29f78a663ca5 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -1223,6 +1223,14 @@ __xfs_filemap_fault(
 	return ret;
 }
 
+static inline bool
+xfs_is_write_fault(
+	struct vm_fault		*vmf)
+{
+	return (vmf->flags & FAULT_FLAG_WRITE) &&
+	       (vmf->vma->vm_flags & VM_SHARED);
+}
+
 static vm_fault_t
 xfs_filemap_fault(
 	struct vm_fault		*vmf)
@@ -1230,7 +1238,7 @@ xfs_filemap_fault(
 	/* DAX can shortcut the normal fault path on write faults! */
 	return __xfs_filemap_fault(vmf, PE_SIZE_PTE,
 			IS_DAX(file_inode(vmf->vma->vm_file)) &&
-			(vmf->flags & FAULT_FLAG_WRITE));
+			xfs_is_write_fault(vmf));
 }
 
 static vm_fault_t
@@ -1243,7 +1251,7 @@ xfs_filemap_huge_fault(
 
 	/* DAX can shortcut the normal fault path on write faults! */
 	return __xfs_filemap_fault(vmf, pe_size,
-			(vmf->flags & FAULT_FLAG_WRITE));
+			xfs_is_write_fault(vmf));
 }
 
 static vm_fault_t
-- 
GitLab


From f1796544a0ca0f14386a679d3d05fbc69235015e Mon Sep 17 00:00:00 2001
From: Michal Hocko <mhocko@suse.com>
Date: Fri, 4 Sep 2020 16:35:24 -0700
Subject: [PATCH 1075/1341] memcg: fix use-after-free in uncharge_batch

syzbot has reported an use-after-free in the uncharge_batch path

  BUG: KASAN: use-after-free in instrument_atomic_write include/linux/instrumented.h:71 [inline]
  BUG: KASAN: use-after-free in atomic64_sub_return include/asm-generic/atomic-instrumented.h:970 [inline]
  BUG: KASAN: use-after-free in atomic_long_sub_return include/asm-generic/atomic-long.h:113 [inline]
  BUG: KASAN: use-after-free in page_counter_cancel mm/page_counter.c:54 [inline]
  BUG: KASAN: use-after-free in page_counter_uncharge+0x3d/0xc0 mm/page_counter.c:155
  Write of size 8 at addr ffff8880371c0148 by task syz-executor.0/9304

  CPU: 0 PID: 9304 Comm: syz-executor.0 Not tainted 5.8.0-syzkaller #0
  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
  Call Trace:
    __dump_stack lib/dump_stack.c:77 [inline]
    dump_stack+0x1f0/0x31e lib/dump_stack.c:118
    print_address_description+0x66/0x620 mm/kasan/report.c:383
    __kasan_report mm/kasan/report.c:513 [inline]
    kasan_report+0x132/0x1d0 mm/kasan/report.c:530
    check_memory_region_inline mm/kasan/generic.c:183 [inline]
    check_memory_region+0x2b5/0x2f0 mm/kasan/generic.c:192
    instrument_atomic_write include/linux/instrumented.h:71 [inline]
    atomic64_sub_return include/asm-generic/atomic-instrumented.h:970 [inline]
    atomic_long_sub_return include/asm-generic/atomic-long.h:113 [inline]
    page_counter_cancel mm/page_counter.c:54 [inline]
    page_counter_uncharge+0x3d/0xc0 mm/page_counter.c:155
    uncharge_batch+0x6c/0x350 mm/memcontrol.c:6764
    uncharge_page+0x115/0x430 mm/memcontrol.c:6796
    uncharge_list mm/memcontrol.c:6835 [inline]
    mem_cgroup_uncharge_list+0x70/0xe0 mm/memcontrol.c:6877
    release_pages+0x13a2/0x1550 mm/swap.c:911
    tlb_batch_pages_flush mm/mmu_gather.c:49 [inline]
    tlb_flush_mmu_free mm/mmu_gather.c:242 [inline]
    tlb_flush_mmu+0x780/0x910 mm/mmu_gather.c:249
    tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:328
    exit_mmap+0x296/0x550 mm/mmap.c:3185
    __mmput+0x113/0x370 kernel/fork.c:1076
    exit_mm+0x4cd/0x550 kernel/exit.c:483
    do_exit+0x576/0x1f20 kernel/exit.c:793
    do_group_exit+0x161/0x2d0 kernel/exit.c:903
    get_signal+0x139b/0x1d30 kernel/signal.c:2743
    arch_do_signal+0x33/0x610 arch/x86/kernel/signal.c:811
    exit_to_user_mode_loop kernel/entry/common.c:135 [inline]
    exit_to_user_mode_prepare+0x8d/0x1b0 kernel/entry/common.c:166
    syscall_exit_to_user_mode+0x5e/0x1a0 kernel/entry/common.c:241
    entry_SYSCALL_64_after_hwframe+0x44/0xa9

Commit 1a3e1f40962c ("mm: memcontrol: decouple reference counting from
page accounting") reworked the memcg lifetime to be bound the the struct
page rather than charges.  It also removed the css_put_many from
uncharge_batch and that is causing the above splat.

uncharge_batch() is supposed to uncharge accumulated charges for all
pages freed from the same memcg.  The queuing is done by uncharge_page
which however drops the memcg reference after it adds charges to the
batch.  If the current page happens to be the last one holding the
reference for its memcg then the memcg is OK to go and the next page to
be freed will trigger batched uncharge which needs to access the memcg
which is gone already.

Fix the issue by taking a reference for the memcg in the current batch.

Fixes: 1a3e1f40962c ("mm: memcontrol: decouple reference counting from page accounting")
Reported-by: syzbot+b305848212deec86eabe@syzkaller.appspotmail.com
Reported-by: syzbot+b5ea6fb6f139c8b9482b@syzkaller.appspotmail.com
Signed-off-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Hugh Dickins <hughd@google.com>
Link: https://lkml.kernel.org/r/20200820090341.GC5033@dhcp22.suse.cz
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/memcontrol.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b807952b4d431..cfa6cbad21d55 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -6774,6 +6774,9 @@ static void uncharge_batch(const struct uncharge_gather *ug)
 	__this_cpu_add(ug->memcg->vmstats_percpu->nr_page_events, ug->nr_pages);
 	memcg_check_events(ug->memcg, ug->dummy_page);
 	local_irq_restore(flags);
+
+	/* drop reference from uncharge_page */
+	css_put(&ug->memcg->css);
 }
 
 static void uncharge_page(struct page *page, struct uncharge_gather *ug)
@@ -6797,6 +6800,9 @@ static void uncharge_page(struct page *page, struct uncharge_gather *ug)
 			uncharge_gather_clear(ug);
 		}
 		ug->memcg = page->mem_cgroup;
+
+		/* pairs with css_put in uncharge_batch */
+		css_get(&ug->memcg->css);
 	}
 
 	nr_pages = compound_nr(page);
-- 
GitLab


From e3336cab2579012b1e72b5265adf98e2d6e244ad Mon Sep 17 00:00:00 2001
From: Xunlei Pang <xlpang@linux.alibaba.com>
Date: Fri, 4 Sep 2020 16:35:27 -0700
Subject: [PATCH 1076/1341] mm: memcg: fix memcg reclaim soft lockup

We've met softlockup with "CONFIG_PREEMPT_NONE=y", when the target memcg
doesn't have any reclaimable memory.

It can be easily reproduced as below:

  watchdog: BUG: soft lockup - CPU#0 stuck for 111s![memcg_test:2204]
  CPU: 0 PID: 2204 Comm: memcg_test Not tainted 5.9.0-rc2+ #12
  Call Trace:
    shrink_lruvec+0x49f/0x640
    shrink_node+0x2a6/0x6f0
    do_try_to_free_pages+0xe9/0x3e0
    try_to_free_mem_cgroup_pages+0xef/0x1f0
    try_charge+0x2c1/0x750
    mem_cgroup_charge+0xd7/0x240
    __add_to_page_cache_locked+0x2fd/0x370
    add_to_page_cache_lru+0x4a/0xc0
    pagecache_get_page+0x10b/0x2f0
    filemap_fault+0x661/0xad0
    ext4_filemap_fault+0x2c/0x40
    __do_fault+0x4d/0xf9
    handle_mm_fault+0x1080/0x1790

It only happens on our 1-vcpu instances, because there's no chance for
oom reaper to run to reclaim the to-be-killed process.

Add a cond_resched() at the upper shrink_node_memcgs() to solve this
issue, this will mean that we will get a scheduling point for each memcg
in the reclaimed hierarchy without any dependency on the reclaimable
memory in that memcg thus making it more predictable.

Suggested-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Xunlei Pang <xlpang@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Chris Down <chris@chrisdown.name>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Link: http://lkml.kernel.org/r/1598495549-67324-1-git-send-email-xlpang@linux.alibaba.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/vmscan.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 99e1796eb8336..9727dd8e2581b 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2615,6 +2615,14 @@ static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)
 		unsigned long reclaimed;
 		unsigned long scanned;
 
+		/*
+		 * This loop can become CPU-bound when target memcgs
+		 * aren't eligible for reclaim - either because they
+		 * don't have any reclaimable pages, or because their
+		 * memory is explicitly protected. Avoid soft lockups.
+		 */
+		cond_resched();
+
 		mem_cgroup_calculate_protection(target_memcg, memcg);
 
 		if (mem_cgroup_below_min(memcg)) {
-- 
GitLab


From dc07a728d49cf025f5da2c31add438d839d076c0 Mon Sep 17 00:00:00 2001
From: Eugeniu Rosca <erosca@de.adit-jv.com>
Date: Fri, 4 Sep 2020 16:35:30 -0700
Subject: [PATCH 1077/1341] mm: slub: fix conversion of freelist_corrupted()

Commit 52f23478081ae0 ("mm/slub.c: fix corrupted freechain in
deactivate_slab()") suffered an update when picked up from LKML [1].

Specifically, relocating 'freelist = NULL' into 'freelist_corrupted()'
created a no-op statement.  Fix it by sticking to the behavior intended
in the original patch [1].  In addition, make freelist_corrupted()
immune to passing NULL instead of &freelist.

The issue has been spotted via static analysis and code review.

[1] https://lore.kernel.org/linux-mm/20200331031450.12182-1-dongli.zhang@oracle.com/

Fixes: 52f23478081ae0 ("mm/slub.c: fix corrupted freechain in deactivate_slab()")
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Dongli Zhang <dongli.zhang@oracle.com>
Cc: Joe Jin <joe.jin@oracle.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200824130643.10291-1-erosca@de.adit-jv.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/slub.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 68c02b2eecd90..d4177aecedf6b 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -672,12 +672,12 @@ static void slab_fix(struct kmem_cache *s, char *fmt, ...)
 }
 
 static bool freelist_corrupted(struct kmem_cache *s, struct page *page,
-			       void *freelist, void *nextfree)
+			       void **freelist, void *nextfree)
 {
 	if ((s->flags & SLAB_CONSISTENCY_CHECKS) &&
-	    !check_valid_pointer(s, page, nextfree)) {
-		object_err(s, page, freelist, "Freechain corrupt");
-		freelist = NULL;
+	    !check_valid_pointer(s, page, nextfree) && freelist) {
+		object_err(s, page, *freelist, "Freechain corrupt");
+		*freelist = NULL;
 		slab_fix(s, "Isolate corrupted freechain");
 		return true;
 	}
@@ -1494,7 +1494,7 @@ static inline void dec_slabs_node(struct kmem_cache *s, int node,
 							int objects) {}
 
 static bool freelist_corrupted(struct kmem_cache *s, struct page *page,
-			       void *freelist, void *nextfree)
+			       void **freelist, void *nextfree)
 {
 	return false;
 }
@@ -2184,7 +2184,7 @@ static void deactivate_slab(struct kmem_cache *s, struct page *page,
 		 * 'freelist' is already corrupted.  So isolate all objects
 		 * starting at 'freelist'.
 		 */
-		if (freelist_corrupted(s, page, freelist, nextfree))
+		if (freelist_corrupted(s, page, &freelist, nextfree))
 			break;
 
 		do {
-- 
GitLab


From f548a64570cbb7ca3760643b9e2d7c45b9fe2931 Mon Sep 17 00:00:00 2001
From: Robert Richter <rric@kernel.org>
Date: Fri, 4 Sep 2020 16:35:33 -0700
Subject: [PATCH 1078/1341] MAINTAINERS: update Cavium/Marvell entries

I am leaving Marvell and already do not have access to my @marvell.com
email address.  So switching over to my korg mail address or removing my
address there another maintainer is already listed.  For the entries
there no other maintainer is listed I will keep looking into patches for
Cavium systems for a while until someone from Marvell takes it over.

Since I might have limited access to hardware and also limited time I
changed state to 'Odd Fixes' for those entries.

Signed-off-by: Robert Richter <rric@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Ganapatrao Kulkarni <gkulkarni@marvell.com>
Cc: Sunil Goutham <sgoutham@marvell.com>
CC: Borislav Petkov <bp@alien8.de>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Wolfram Sang <wsa@kernel.org>,
Link: https://lkml.kernel.org/r/20200824122050.31164-1-rric@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 MAINTAINERS | 28 +++++++++++++---------------
 1 file changed, 13 insertions(+), 15 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index dca9bfd8c8880..94cfce940c6c3 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1694,7 +1694,6 @@ F:	arch/arm/mach-cns3xxx/
 
 ARM/CAVIUM THUNDER NETWORK DRIVER
 M:	Sunil Goutham <sgoutham@marvell.com>
-M:	Robert Richter <rrichter@marvell.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Supported
 F:	drivers/net/ethernet/cavium/thunder/
@@ -3948,8 +3947,8 @@ W:	https://wireless.wiki.kernel.org/en/users/Drivers/carl9170
 F:	drivers/net/wireless/ath/carl9170/
 
 CAVIUM I2C DRIVER
-M:	Robert Richter <rrichter@marvell.com>
-S:	Supported
+M:	Robert Richter <rric@kernel.org>
+S:	Odd Fixes
 W:	http://www.marvell.com
 F:	drivers/i2c/busses/i2c-octeon*
 F:	drivers/i2c/busses/i2c-thunderx*
@@ -3964,8 +3963,8 @@ W:	http://www.marvell.com
 F:	drivers/net/ethernet/cavium/liquidio/
 
 CAVIUM MMC DRIVER
-M:	Robert Richter <rrichter@marvell.com>
-S:	Supported
+M:	Robert Richter <rric@kernel.org>
+S:	Odd Fixes
 W:	http://www.marvell.com
 F:	drivers/mmc/host/cavium*
 
@@ -3977,9 +3976,9 @@ W:	http://www.marvell.com
 F:	drivers/crypto/cavium/cpt/
 
 CAVIUM THUNDERX2 ARM64 SOC
-M:	Robert Richter <rrichter@marvell.com>
+M:	Robert Richter <rric@kernel.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-S:	Maintained
+S:	Odd Fixes
 F:	Documentation/devicetree/bindings/arm/cavium-thunder2.txt
 F:	arch/arm64/boot/dts/cavium/thunder2-99xx*
 
@@ -6191,16 +6190,15 @@ F:	drivers/edac/highbank*
 
 EDAC-CAVIUM OCTEON
 M:	Ralf Baechle <ralf@linux-mips.org>
-M:	Robert Richter <rrichter@marvell.com>
 L:	linux-edac@vger.kernel.org
 L:	linux-mips@vger.kernel.org
 S:	Supported
 F:	drivers/edac/octeon_edac*
 
 EDAC-CAVIUM THUNDERX
-M:	Robert Richter <rrichter@marvell.com>
+M:	Robert Richter <rric@kernel.org>
 L:	linux-edac@vger.kernel.org
-S:	Supported
+S:	Odd Fixes
 F:	drivers/edac/thunderx_edac*
 
 EDAC-CORE
@@ -6208,7 +6206,7 @@ M:	Borislav Petkov <bp@alien8.de>
 M:	Mauro Carvalho Chehab <mchehab@kernel.org>
 M:	Tony Luck <tony.luck@intel.com>
 R:	James Morse <james.morse@arm.com>
-R:	Robert Richter <rrichter@marvell.com>
+R:	Robert Richter <rric@kernel.org>
 L:	linux-edac@vger.kernel.org
 S:	Supported
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras.git edac-for-next
@@ -13446,10 +13444,10 @@ F:	Documentation/devicetree/bindings/pci/axis,artpec*
 F:	drivers/pci/controller/dwc/*artpec*
 
 PCIE DRIVER FOR CAVIUM THUNDERX
-M:	Robert Richter <rrichter@marvell.com>
+M:	Robert Richter <rric@kernel.org>
 L:	linux-pci@vger.kernel.org
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
-S:	Supported
+S:	Odd Fixes
 F:	drivers/pci/controller/pci-thunder-*
 
 PCIE DRIVER FOR HISILICON
@@ -17237,8 +17235,8 @@ S:	Maintained
 F:	drivers/net/thunderbolt.c
 
 THUNDERX GPIO DRIVER
-M:	Robert Richter <rrichter@marvell.com>
-S:	Maintained
+M:	Robert Richter <rric@kernel.org>
+S:	Odd Fixes
 F:	drivers/gpio/gpio-thunderx.c
 
 TI AM437X VPFE DRIVER
-- 
GitLab


From b9644289657748314dbfe6502c316b3f09e251ed Mon Sep 17 00:00:00 2001
From: Nick Desaulniers <ndesaulniers@google.com>
Date: Fri, 4 Sep 2020 16:35:37 -0700
Subject: [PATCH 1079/1341] MAINTAINERS: add LLVM maintainers

Nominate Nathan and myself to be point of contact for clang/LLVM related
support, after a poll at the LLVM BoF at Linux Plumbers Conf 2020.

While corporate sponsorship is beneficial, its important to not entrust
the keys to the nukes with any one entity.  Should Nathan and I find
ourselves at the same employer, I would gladly step down.

Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Sedat Dilek <sedat.dilek@gmail.com>
Acked-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Acked-by: Masahiro Yamada <masahiroy@kernel.org>
Link: https://lkml.kernel.org/r/20200825143540.2948637-1-ndesaulniers@google.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 MAINTAINERS | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 94cfce940c6c3..9f5937cbf9de6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4257,6 +4257,8 @@ S:	Maintained
 F:	.clang-format
 
 CLANG/LLVM BUILD SUPPORT
+M:	Nathan Chancellor <natechancellor@gmail.com>
+M:	Nick Desaulniers <ndesaulniers@google.com>
 L:	clang-built-linux@googlegroups.com
 S:	Supported
 W:	https://clangbuiltlinux.github.io/
-- 
GitLab


From 9d90dd188d5e25742d41bd8b91dd5f22da587cdc Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Fri, 4 Sep 2020 16:35:40 -0700
Subject: [PATCH 1080/1341] MAINTAINERS: IA64: mark Status as Odd Fixes only

IA64 isn't really being maintained, so mark it as Odd Fixes only.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/7e719139-450f-52c2-59a2-7964a34eda1f@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 MAINTAINERS | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 9f5937cbf9de6..cef55acca692d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8272,7 +8272,7 @@ IA64 (Itanium) PLATFORM
 M:	Tony Luck <tony.luck@intel.com>
 M:	Fenghua Yu <fenghua.yu@intel.com>
 L:	linux-ia64@vger.kernel.org
-S:	Maintained
+S:	Odd Fixes
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux.git
 F:	Documentation/ia64/
 F:	arch/ia64/
-- 
GitLab


From e80d3909be42f7e38cc350c1ba109cf0aa51956a Mon Sep 17 00:00:00 2001
From: Joerg Roedel <jroedel@suse.de>
Date: Fri, 4 Sep 2020 16:35:43 -0700
Subject: [PATCH 1081/1341] mm: track page table modifications in
 __apply_to_page_range()

__apply_to_page_range() is also used to change and/or allocate
page-table pages in the vmalloc area of the address space.  Make sure
these changes get synchronized to other page-tables in the system by
calling arch_sync_kernel_mappings() when necessary.

The impact appears limited to x86-32, where apply_to_page_range may miss
updating the PMD.  That leads to explosions in drivers like

  BUG: unable to handle page fault for address: fe036000
  #PF: supervisor write access in kernel mode
  #PF: error_code(0x0002) - not-present page
  *pde = 00000000
  Oops: 0002 [#1] SMP
  CPU: 3 PID: 1300 Comm: gem_concurrent_ Not tainted 5.9.0-rc1+ #16
  Hardware name:  /NUC6i3SYB, BIOS SYSKLi35.86A.0024.2015.1027.2142 10/27/2015
  EIP: __execlists_context_alloc+0x132/0x2d0 [i915]
  Code: 31 d2 89 f0 e8 2f 55 02 00 89 45 e8 3d 00 f0 ff ff 0f 87 11 01 00 00 8b 4d e8 03 4b 30 b8 5a 5a 5a 5a ba 01 00 00 00 8d 79 04 <c7> 01 5a 5a 5a 5a c7 81 fc 0f 00 00 5a 5a 5a 5a 83 e7 fc 29 f9 81
  EAX: 5a5a5a5a EBX: f60ca000 ECX: fe036000 EDX: 00000001
  ESI: f43b7340 EDI: fe036004 EBP: f6389cb8 ESP: f6389c9c
  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00010286
  CR0: 80050033 CR2: fe036000 CR3: 2d361000 CR4: 001506d0
  DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
  DR6: fffe0ff0 DR7: 00000400
  Call Trace:
    execlists_context_alloc+0x10/0x20 [i915]
    intel_context_alloc_state+0x3f/0x70 [i915]
    __intel_context_do_pin+0x117/0x170 [i915]
    i915_gem_do_execbuffer+0xcc7/0x2500 [i915]
    i915_gem_execbuffer2_ioctl+0xcd/0x1f0 [i915]
    drm_ioctl_kernel+0x8f/0xd0
    drm_ioctl+0x223/0x3d0
    __ia32_sys_ioctl+0x1ab/0x760
    __do_fast_syscall_32+0x3f/0x70
    do_fast_syscall_32+0x29/0x60
    do_SYSENTER_32+0x15/0x20
    entry_SYSENTER_32+0x9f/0xf2
  EIP: 0xb7f28559
  Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d 76 00 58 b8 77 00 00 00 cd 80 90 8d 76
  EAX: ffffffda EBX: 00000005 ECX: c0406469 EDX: bf95556c
  ESI: b7e68000 EDI: c0406469 EBP: 00000005 ESP: bf9554d8
  DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b EFLAGS: 00000296
  Modules linked in: i915 x86_pkg_temp_thermal intel_powerclamp crc32_pclmul crc32c_intel intel_cstate intel_uncore intel_gtt drm_kms_helper intel_pch_thermal video button autofs4 i2c_i801 i2c_smbus fan
  CR2: 00000000fe036000

It looks like kasan, xen and i915 are vulnerable.

Actual impact is "on thinkpad X60 in 5.9-rc1, screen starts blinking
after 30-or-so minutes, and machine is unusable"

[sfr@canb.auug.org.au: ARCH_PAGE_TABLE_SYNC_MASK needs vmalloc.h]
  Link: https://lkml.kernel.org/r/20200825172508.16800a4f@canb.auug.org.au
[chris@chris-wilson.co.uk: changelog addition]
[pavel@ucw.cz: changelog addition]

Fixes: 2ba3e6947aed ("mm/vmalloc: track which page-table levels were modified")
Fixes: 86cf69f1d893 ("x86/mm/32: implement arch_sync_kernel_mappings()")
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Chris Wilson <chris@chris-wilson.co.uk>	[x86-32]
Tested-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: <stable@vger.kernel.org>	[5.8+]
Link: https://lkml.kernel.org/r/20200821123746.16904-1-joro@8bytes.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/memory.c | 37 ++++++++++++++++++++++++-------------
 1 file changed, 24 insertions(+), 13 deletions(-)

diff --git a/mm/memory.c b/mm/memory.c
index 602f4283122f7..547b81a140591 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -73,6 +73,7 @@
 #include <linux/numa.h>
 #include <linux/perf_event.h>
 #include <linux/ptrace.h>
+#include <linux/vmalloc.h>
 
 #include <trace/events/kmem.h>
 
@@ -83,6 +84,7 @@
 #include <asm/tlb.h>
 #include <asm/tlbflush.h>
 
+#include "pgalloc-track.h"
 #include "internal.h"
 
 #if defined(LAST_CPUPID_NOT_IN_PAGE_FLAGS) && !defined(CONFIG_COMPILE_TEST)
@@ -2206,7 +2208,8 @@ EXPORT_SYMBOL(vm_iomap_memory);
 
 static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
 				     unsigned long addr, unsigned long end,
-				     pte_fn_t fn, void *data, bool create)
+				     pte_fn_t fn, void *data, bool create,
+				     pgtbl_mod_mask *mask)
 {
 	pte_t *pte;
 	int err = 0;
@@ -2214,7 +2217,7 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
 
 	if (create) {
 		pte = (mm == &init_mm) ?
-			pte_alloc_kernel(pmd, addr) :
+			pte_alloc_kernel_track(pmd, addr, mask) :
 			pte_alloc_map_lock(mm, pmd, addr, &ptl);
 		if (!pte)
 			return -ENOMEM;
@@ -2235,6 +2238,7 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
 				break;
 		}
 	} while (addr += PAGE_SIZE, addr != end);
+	*mask |= PGTBL_PTE_MODIFIED;
 
 	arch_leave_lazy_mmu_mode();
 
@@ -2245,7 +2249,8 @@ static int apply_to_pte_range(struct mm_struct *mm, pmd_t *pmd,
 
 static int apply_to_pmd_range(struct mm_struct *mm, pud_t *pud,
 				     unsigned long addr, unsigned long end,
-				     pte_fn_t fn, void *data, bool create)
+				     pte_fn_t fn, void *data, bool create,
+				     pgtbl_mod_mask *mask)
 {
 	pmd_t *pmd;
 	unsigned long next;
@@ -2254,7 +2259,7 @@ static int apply_to_pmd_range(struct mm_struct *mm, pud_t *pud,
 	BUG_ON(pud_huge(*pud));
 
 	if (create) {
-		pmd = pmd_alloc(mm, pud, addr);
+		pmd = pmd_alloc_track(mm, pud, addr, mask);
 		if (!pmd)
 			return -ENOMEM;
 	} else {
@@ -2264,7 +2269,7 @@ static int apply_to_pmd_range(struct mm_struct *mm, pud_t *pud,
 		next = pmd_addr_end(addr, end);
 		if (create || !pmd_none_or_clear_bad(pmd)) {
 			err = apply_to_pte_range(mm, pmd, addr, next, fn, data,
-						 create);
+						 create, mask);
 			if (err)
 				break;
 		}
@@ -2274,14 +2279,15 @@ static int apply_to_pmd_range(struct mm_struct *mm, pud_t *pud,
 
 static int apply_to_pud_range(struct mm_struct *mm, p4d_t *p4d,
 				     unsigned long addr, unsigned long end,
-				     pte_fn_t fn, void *data, bool create)
+				     pte_fn_t fn, void *data, bool create,
+				     pgtbl_mod_mask *mask)
 {
 	pud_t *pud;
 	unsigned long next;
 	int err = 0;
 
 	if (create) {
-		pud = pud_alloc(mm, p4d, addr);
+		pud = pud_alloc_track(mm, p4d, addr, mask);
 		if (!pud)
 			return -ENOMEM;
 	} else {
@@ -2291,7 +2297,7 @@ static int apply_to_pud_range(struct mm_struct *mm, p4d_t *p4d,
 		next = pud_addr_end(addr, end);
 		if (create || !pud_none_or_clear_bad(pud)) {
 			err = apply_to_pmd_range(mm, pud, addr, next, fn, data,
-						 create);
+						 create, mask);
 			if (err)
 				break;
 		}
@@ -2301,14 +2307,15 @@ static int apply_to_pud_range(struct mm_struct *mm, p4d_t *p4d,
 
 static int apply_to_p4d_range(struct mm_struct *mm, pgd_t *pgd,
 				     unsigned long addr, unsigned long end,
-				     pte_fn_t fn, void *data, bool create)
+				     pte_fn_t fn, void *data, bool create,
+				     pgtbl_mod_mask *mask)
 {
 	p4d_t *p4d;
 	unsigned long next;
 	int err = 0;
 
 	if (create) {
-		p4d = p4d_alloc(mm, pgd, addr);
+		p4d = p4d_alloc_track(mm, pgd, addr, mask);
 		if (!p4d)
 			return -ENOMEM;
 	} else {
@@ -2318,7 +2325,7 @@ static int apply_to_p4d_range(struct mm_struct *mm, pgd_t *pgd,
 		next = p4d_addr_end(addr, end);
 		if (create || !p4d_none_or_clear_bad(p4d)) {
 			err = apply_to_pud_range(mm, p4d, addr, next, fn, data,
-						 create);
+						 create, mask);
 			if (err)
 				break;
 		}
@@ -2331,8 +2338,9 @@ static int __apply_to_page_range(struct mm_struct *mm, unsigned long addr,
 				 void *data, bool create)
 {
 	pgd_t *pgd;
-	unsigned long next;
+	unsigned long start = addr, next;
 	unsigned long end = addr + size;
+	pgtbl_mod_mask mask = 0;
 	int err = 0;
 
 	if (WARN_ON(addr >= end))
@@ -2343,11 +2351,14 @@ static int __apply_to_page_range(struct mm_struct *mm, unsigned long addr,
 		next = pgd_addr_end(addr, end);
 		if (!create && pgd_none_or_clear_bad(pgd))
 			continue;
-		err = apply_to_p4d_range(mm, pgd, addr, next, fn, data, create);
+		err = apply_to_p4d_range(mm, pgd, addr, next, fn, data, create, &mask);
 		if (err)
 			break;
 	} while (pgd++, addr = next, addr != end);
 
+	if (mask & ARCH_PAGE_TABLE_SYNC_MASK)
+		arch_sync_kernel_mappings(start, start + size);
+
 	return err;
 }
 
-- 
GitLab


From fff1662cc423be00c5a7dffc6cf2332161c882d6 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 4 Sep 2020 16:35:46 -0700
Subject: [PATCH 1082/1341] ipc: adjust proc_ipc_sem_dointvec definition to
 match prototype

Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ctl_table.proc_handler to take a kernel pointer.  Adjust the
signature of proc_ipc_sem_dointvec to match ctl_table.proc_handler which
fixes the following sparse error/warning:

  ipc/ipc_sysctl.c:94:47: warning: incorrect type in argument 3 (different address spaces)
  ipc/ipc_sysctl.c:94:47:    expected void *buffer
  ipc/ipc_sysctl.c:94:47:    got void [noderef] __user *buffer
  ipc/ipc_sysctl.c:194:35: warning: incorrect type in initializer (incompatible argument 3 (different address spaces))
  ipc/ipc_sysctl.c:194:35:    expected int ( [usertype] *proc_handler )( ... )
  ipc/ipc_sysctl.c:194:35:    got int ( * )( ... )

Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/20200825105846.5193-1-tklauser@distanz.ch
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 ipc/ipc_sysctl.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ipc/ipc_sysctl.c b/ipc/ipc_sysctl.c
index d1b8644bfb884..3f312bf2b1163 100644
--- a/ipc/ipc_sysctl.c
+++ b/ipc/ipc_sysctl.c
@@ -85,7 +85,7 @@ static int proc_ipc_auto_msgmni(struct ctl_table *table, int write,
 }
 
 static int proc_ipc_sem_dointvec(struct ctl_table *table, int write,
-	void __user *buffer, size_t *lenp, loff_t *ppos)
+	void *buffer, size_t *lenp, loff_t *ppos)
 {
 	int ret, semmni;
 	struct ipc_namespace *ns = current->nsproxy->ipc_ns;
-- 
GitLab


From b0daa2c73f3a8ab9183a9d298495b583b6c1bd19 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 4 Sep 2020 16:35:49 -0700
Subject: [PATCH 1083/1341] fork: adjust sysctl_max_threads definition to match
 prototype

Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ctl_table.proc_handler to take a kernel pointer.  Adjust the
definition of sysctl_max_threads to match its prototype in
linux/sysctl.h which fixes the following sparse error/warning:

  kernel/fork.c:3050:47: warning: incorrect type in argument 3 (different address spaces)
  kernel/fork.c:3050:47:    expected void *
  kernel/fork.c:3050:47:    got void [noderef] __user *buffer
  kernel/fork.c:3036:5: error: symbol 'sysctl_max_threads' redeclared with different type (incompatible argument 3 (different address spaces)):
  kernel/fork.c:3036:5:    int extern [addressable] [signed] [toplevel] sysctl_max_threads( ... )
  kernel/fork.c: note: in included file (through include/linux/key.h, include/linux/cred.h, include/linux/sched/signal.h, include/linux/sched/cputime.h):
  include/linux/sysctl.h:242:5: note: previously declared as:
  include/linux/sysctl.h:242:5:    int extern [addressable] [signed] [toplevel] sysctl_max_threads( ... )

Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/20200825093647.24263-1-tklauser@distanz.ch
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 kernel/fork.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index 4d32190861bdc..49677d668de4d 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -3014,7 +3014,7 @@ int unshare_files(struct files_struct **displaced)
 }
 
 int sysctl_max_threads(struct ctl_table *table, int write,
-		       void __user *buffer, size_t *lenp, loff_t *ppos)
+		       void *buffer, size_t *lenp, loff_t *ppos)
 {
 	struct ctl_table t;
 	int ret;
-- 
GitLab


From 13e45417cedbfc44b1926124b1846f5ee8c6ba4a Mon Sep 17 00:00:00 2001
From: Mrinal Pandey <mrinalmni@gmail.com>
Date: Fri, 4 Sep 2020 16:35:52 -0700
Subject: [PATCH 1084/1341] checkpatch: fix the usage of capture group ( ... )

The usage of "capture group (...)" in the immediate condition after `&&`
results in `$1` being uninitialized.  This issues a warning "Use of
uninitialized value $1 in regexp compilation at ./scripts/checkpatch.pl
line 2638".

I noticed this bug while running checkpatch on the set of commits from
v5.7 to v5.8-rc1 of the kernel on the commits with a diff content in
their commit message.

This bug was introduced in the script by commit e518e9a59ec3
("checkpatch: emit an error when there's a diff in a changelog").  It
has been in the script since then.

The author intended to store the match made by capture group in variable
`$1`.  This should have contained the name of the file as `[\w/]+`
matched.  However, this couldn't be accomplished due to usage of capture
group and `$1` in the same regular expression.

Fix this by placing the capture group in the condition before `&&`.
Thus, `$1` can be initialized to the text that capture group matches
thereby setting it to the desired and required value.

Fixes: e518e9a59ec3 ("checkpatch: emit an error when there's a diff in a changelog")
Signed-off-by: Mrinal Pandey <mrinalmni@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Reviewed-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
Cc: Joe Perches <joe@perches.com>
Link: https://lkml.kernel.org/r/20200714032352.f476hanaj2dlmiot@mrinalpandey
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 scripts/checkpatch.pl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index 60d4a79674b6e..504d2e431c604 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2639,8 +2639,8 @@ sub process {
 
 # Check if the commit log has what seems like a diff which can confuse patch
 		if ($in_commit_log && !$commit_log_has_diff &&
-		    (($line =~ m@^\s+diff\b.*a/[\w/]+@ &&
-		      $line =~ m@^\s+diff\b.*a/([\w/]+)\s+b/$1\b@) ||
+		    (($line =~ m@^\s+diff\b.*a/([\w/]+)@ &&
+		      $line =~ m@^\s+diff\b.*a/[\w/]+\s+b/$1\b@) ||
 		     $line =~ m@^\s*(?:\-\-\-\s+a/|\+\+\+\s+b/)@ ||
 		     $line =~ m/^\s*\@\@ \-\d+,\d+ \+\d+,\d+ \@\@/)) {
 			ERROR("DIFF_IN_COMMIT_MSG",
-- 
GitLab


From 7867fd7cc44e63c6673cd0f8fea155456d34d0de Mon Sep 17 00:00:00 2001
From: Yang Shi <shy828301@gmail.com>
Date: Fri, 4 Sep 2020 16:35:55 -0700
Subject: [PATCH 1085/1341] mm: madvise: fix vma user-after-free

The syzbot reported the below use-after-free:

  BUG: KASAN: use-after-free in madvise_willneed mm/madvise.c:293 [inline]
  BUG: KASAN: use-after-free in madvise_vma mm/madvise.c:942 [inline]
  BUG: KASAN: use-after-free in do_madvise.part.0+0x1c8b/0x1cf0 mm/madvise.c:1145
  Read of size 8 at addr ffff8880a6163eb0 by task syz-executor.0/9996

  CPU: 0 PID: 9996 Comm: syz-executor.0 Not tainted 5.9.0-rc1-syzkaller #0
  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
  Call Trace:
    __dump_stack lib/dump_stack.c:77 [inline]
    dump_stack+0x18f/0x20d lib/dump_stack.c:118
    print_address_description.constprop.0.cold+0xae/0x497 mm/kasan/report.c:383
    __kasan_report mm/kasan/report.c:513 [inline]
    kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
    madvise_willneed mm/madvise.c:293 [inline]
    madvise_vma mm/madvise.c:942 [inline]
    do_madvise.part.0+0x1c8b/0x1cf0 mm/madvise.c:1145
    do_madvise mm/madvise.c:1169 [inline]
    __do_sys_madvise mm/madvise.c:1171 [inline]
    __se_sys_madvise mm/madvise.c:1169 [inline]
    __x64_sys_madvise+0xd9/0x110 mm/madvise.c:1169
    do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    entry_SYSCALL_64_after_hwframe+0x44/0xa9

  Allocated by task 9992:
    kmem_cache_alloc+0x138/0x3a0 mm/slab.c:3482
    vm_area_alloc+0x1c/0x110 kernel/fork.c:347
    mmap_region+0x8e5/0x1780 mm/mmap.c:1743
    do_mmap+0xcf9/0x11d0 mm/mmap.c:1545
    vm_mmap_pgoff+0x195/0x200 mm/util.c:506
    ksys_mmap_pgoff+0x43a/0x560 mm/mmap.c:1596
    do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    entry_SYSCALL_64_after_hwframe+0x44/0xa9

  Freed by task 9992:
    kmem_cache_free.part.0+0x67/0x1f0 mm/slab.c:3693
    remove_vma+0x132/0x170 mm/mmap.c:184
    remove_vma_list mm/mmap.c:2613 [inline]
    __do_munmap+0x743/0x1170 mm/mmap.c:2869
    do_munmap mm/mmap.c:2877 [inline]
    mmap_region+0x257/0x1780 mm/mmap.c:1716
    do_mmap+0xcf9/0x11d0 mm/mmap.c:1545
    vm_mmap_pgoff+0x195/0x200 mm/util.c:506
    ksys_mmap_pgoff+0x43a/0x560 mm/mmap.c:1596
    do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    entry_SYSCALL_64_after_hwframe+0x44/0xa9

It is because vma is accessed after releasing mmap_lock, but someone
else acquired the mmap_lock and the vma is gone.

Releasing mmap_lock after accessing vma should fix the problem.

Fixes: 692fe62433d4c ("mm: Handle MADV_WILLNEED through vfs_fadvise()")
Reported-by: syzbot+b90df26038d1d5d85c97@syzkaller.appspotmail.com
Signed-off-by: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: <stable@vger.kernel.org>	[5.4+]
Link: https://lkml.kernel.org/r/20200816141204.162624-1-shy828301@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/madvise.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/madvise.c b/mm/madvise.c
index dd1d43cf026de..d4aa5f7765435 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -289,9 +289,9 @@ static long madvise_willneed(struct vm_area_struct *vma,
 	 */
 	*prev = NULL;	/* tell sys_madvise we drop mmap_lock */
 	get_file(file);
-	mmap_read_unlock(current->mm);
 	offset = (loff_t)(start - vma->vm_start)
 			+ ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
+	mmap_read_unlock(current->mm);
 	vfs_fadvise(file, offset, end - start, POSIX_FADV_WILLNEED);
 	fput(file);
 	mmap_read_lock(current->mm);
-- 
GitLab


From ebdf8321eeeb623aed60f7ed16f7445363230118 Mon Sep 17 00:00:00 2001
From: Alistair Popple <alistair@popple.id.au>
Date: Fri, 4 Sep 2020 16:35:58 -0700
Subject: [PATCH 1086/1341] mm/migrate: fixup setting UFFD_WP flag
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Commit f45ec5ff16a75 ("userfaultfd: wp: support swap and page migration")
introduced support for tracking the uffd wp bit during page migration.
However the non-swap PTE variant was used to set the flag for zone device
private pages which are a type of swap page.

This leads to corruption of the swap offset if the original PTE has the
uffd_wp flag set.

Fixes: f45ec5ff16a75 ("userfaultfd: wp: support swap and page migration")
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Link: https://lkml.kernel.org/r/20200825064232.10023-1-alistair@popple.id.au
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/migrate.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 34a842a8eb6a7..ddb64253fe3ea 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -251,7 +251,7 @@ static bool remove_migration_pte(struct page *page, struct vm_area_struct *vma,
 				entry = make_device_private_entry(new, pte_write(pte));
 				pte = swp_entry_to_pte(entry);
 				if (pte_swp_uffd_wp(*pvmw.pte))
-					pte = pte_mkuffd_wp(pte);
+					pte = pte_swp_mkuffd_wp(pte);
 			}
 		}
 
-- 
GitLab


From ad7df764b7e1c7dc64e016da7ada2e3e1bb90700 Mon Sep 17 00:00:00 2001
From: Alistair Popple <alistair@popple.id.au>
Date: Fri, 4 Sep 2020 16:36:01 -0700
Subject: [PATCH 1087/1341] mm/rmap: fixup copying of soft dirty and uffd ptes
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

During memory migration a pte is temporarily replaced with a migration
swap pte.  Some pte bits from the existing mapping such as the soft-dirty
and uffd write-protect bits are preserved by copying these to the
temporary migration swap pte.

However these bits are not stored at the same location for swap and
non-swap ptes.  Therefore testing these bits requires using the
appropriate helper function for the given pte type.

Unfortunately several code locations were found where the wrong helper
function is being used to test soft_dirty and uffd_wp bits which leads to
them getting incorrectly set or cleared during page-migration.

Fix these by using the correct tests based on pte type.

Fixes: a5430dda8a3a ("mm/migrate: support un-addressable ZONE_DEVICE page in migration")
Fixes: 8c3328f1f36a ("mm/migrate: migrate_vma() unmap page from vma while collecting pages")
Fixes: f45ec5ff16a7 ("userfaultfd: wp: support swap and page migration")
Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Peter Xu <peterx@redhat.com>
Cc: Jérôme Glisse <jglisse@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Alistair Popple <alistair@popple.id.au>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200825064232.10023-2-alistair@popple.id.au
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/migrate.c | 15 +++++++++++----
 mm/rmap.c    |  9 +++++++--
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index ddb64253fe3ea..12f63806d0ac6 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2427,10 +2427,17 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp,
 			entry = make_migration_entry(page, mpfn &
 						     MIGRATE_PFN_WRITE);
 			swp_pte = swp_entry_to_pte(entry);
-			if (pte_soft_dirty(pte))
-				swp_pte = pte_swp_mksoft_dirty(swp_pte);
-			if (pte_uffd_wp(pte))
-				swp_pte = pte_swp_mkuffd_wp(swp_pte);
+			if (pte_present(pte)) {
+				if (pte_soft_dirty(pte))
+					swp_pte = pte_swp_mksoft_dirty(swp_pte);
+				if (pte_uffd_wp(pte))
+					swp_pte = pte_swp_mkuffd_wp(swp_pte);
+			} else {
+				if (pte_swp_soft_dirty(pte))
+					swp_pte = pte_swp_mksoft_dirty(swp_pte);
+				if (pte_swp_uffd_wp(pte))
+					swp_pte = pte_swp_mkuffd_wp(swp_pte);
+			}
 			set_pte_at(mm, addr, ptep, swp_pte);
 
 			/*
diff --git a/mm/rmap.c b/mm/rmap.c
index 83cc459edc407..9425260774a1f 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1511,9 +1511,14 @@ static bool try_to_unmap_one(struct page *page, struct vm_area_struct *vma,
 			 */
 			entry = make_migration_entry(page, 0);
 			swp_pte = swp_entry_to_pte(entry);
-			if (pte_soft_dirty(pteval))
+
+			/*
+			 * pteval maps a zone device page and is therefore
+			 * a swap pte.
+			 */
+			if (pte_swp_soft_dirty(pteval))
 				swp_pte = pte_swp_mksoft_dirty(swp_pte);
-			if (pte_uffd_wp(pteval))
+			if (pte_swp_uffd_wp(pteval))
 				swp_pte = pte_swp_mkuffd_wp(swp_pte);
 			set_pte_at(mm, pvmw.address, pvmw.pte, swp_pte);
 			/*
-- 
GitLab


From 6128763fc3244d1b4868e5f0aa401f7f987b5c4d Mon Sep 17 00:00:00 2001
From: Ralph Campbell <rcampbell@nvidia.com>
Date: Fri, 4 Sep 2020 16:36:04 -0700
Subject: [PATCH 1088/1341] mm/migrate: remove unnecessary
 is_zone_device_page() check

Patch series "mm/migrate: preserve soft dirty in remove_migration_pte()".

I happened to notice this from code inspection after seeing Alistair
Popple's patch ("mm/rmap: Fixup copying of soft dirty and uffd ptes").

This patch (of 2):

The check for is_zone_device_page() and is_device_private_page() is
unnecessary since the latter is sufficient to determine if the page is a
device private page.  Simplify the code for easier reading.

Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Bharata B Rao <bharata@linux.ibm.com>
Link: https://lkml.kernel.org/r/20200831212222.22409-1-rcampbell@nvidia.com
Link: https://lkml.kernel.org/r/20200831212222.22409-2-rcampbell@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/migrate.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 12f63806d0ac6..1d791d4207254 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -246,13 +246,11 @@ static bool remove_migration_pte(struct page *page, struct vm_area_struct *vma,
 		else if (pte_swp_uffd_wp(*pvmw.pte))
 			pte = pte_mkuffd_wp(pte);
 
-		if (unlikely(is_zone_device_page(new))) {
-			if (is_device_private_page(new)) {
-				entry = make_device_private_entry(new, pte_write(pte));
-				pte = swp_entry_to_pte(entry);
-				if (pte_swp_uffd_wp(*pvmw.pte))
-					pte = pte_swp_mkuffd_wp(pte);
-			}
+		if (unlikely(is_device_private_page(new))) {
+			entry = make_device_private_entry(new, pte_write(pte));
+			pte = swp_entry_to_pte(entry);
+			if (pte_swp_uffd_wp(*pvmw.pte))
+				pte = pte_swp_mkuffd_wp(pte);
 		}
 
 #ifdef CONFIG_HUGETLB_PAGE
-- 
GitLab


From 3d321bf82c4be8e33261754a5775bc65fc5d2184 Mon Sep 17 00:00:00 2001
From: Ralph Campbell <rcampbell@nvidia.com>
Date: Fri, 4 Sep 2020 16:36:07 -0700
Subject: [PATCH 1089/1341] mm/migrate: preserve soft dirty in
 remove_migration_pte()

The code to remove a migration PTE and replace it with a device private
PTE was not copying the soft dirty bit from the migration entry.  This
could lead to page contents not being marked dirty when faulting the page
back from device private memory.

Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Bharata B Rao <bharata@linux.ibm.com>
Link: https://lkml.kernel.org/r/20200831212222.22409-3-rcampbell@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/migrate.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/migrate.c b/mm/migrate.c
index 1d791d4207254..941b89383cf3d 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -249,6 +249,8 @@ static bool remove_migration_pte(struct page *page, struct vm_area_struct *vma,
 		if (unlikely(is_device_private_page(new))) {
 			entry = make_device_private_entry(new, pte_write(pte));
 			pte = swp_entry_to_pte(entry);
+			if (pte_swp_soft_dirty(*pvmw.pte))
+				pte = pte_swp_mksoft_dirty(pte);
 			if (pte_swp_uffd_wp(*pvmw.pte))
 				pte = pte_swp_mkuffd_wp(pte);
 		}
-- 
GitLab


From 953f064aa6b29debcc211869b60bd59f26d19c34 Mon Sep 17 00:00:00 2001
From: Li Xinhai <lixinhai.lxh@gmail.com>
Date: Fri, 4 Sep 2020 16:36:10 -0700
Subject: [PATCH 1090/1341] mm/hugetlb: try preferred node first when alloc
 gigantic page from cma

Since commit cf11e85fc08c ("mm: hugetlb: optionally allocate gigantic
hugepages using cma"), the gigantic page would be allocated from node
which is not the preferred node, although there are pages available from
that node.  The reason is that the nid parameter has been ignored in
alloc_gigantic_page().

Besides, the __GFP_THISNODE also need be checked if user required to
alloc only from the preferred node.

After this patch, the preferred node is tried first before other allowed
nodes, and don't try to allocate from other nodes if __GFP_THISNODE is
specified.  If user don't specify the preferred node, the current node
will be used as preferred node, which makes sure consistent behavior of
allocating gigantic and non-gigantic hugetlb page.

Fixes: cf11e85fc08c ("mm: hugetlb: optionally allocate gigantic hugepages using cma")
Signed-off-by: Li Xinhai <lixinhai.lxh@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Roman Gushchin <guro@fb.com>
Link: https://lkml.kernel.org/r/20200902025016.697260-1-lixinhai.lxh@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/hugetlb.c | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index a301c2d672bf5..5957dc80ebb18 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1250,21 +1250,32 @@ static struct page *alloc_gigantic_page(struct hstate *h, gfp_t gfp_mask,
 		int nid, nodemask_t *nodemask)
 {
 	unsigned long nr_pages = 1UL << huge_page_order(h);
+	if (nid == NUMA_NO_NODE)
+		nid = numa_mem_id();
 
 #ifdef CONFIG_CMA
 	{
 		struct page *page;
 		int node;
 
-		for_each_node_mask(node, *nodemask) {
-			if (!hugetlb_cma[node])
-				continue;
-
-			page = cma_alloc(hugetlb_cma[node], nr_pages,
-					 huge_page_order(h), true);
+		if (hugetlb_cma[nid]) {
+			page = cma_alloc(hugetlb_cma[nid], nr_pages,
+					huge_page_order(h), true);
 			if (page)
 				return page;
 		}
+
+		if (!(gfp_mask & __GFP_THISNODE)) {
+			for_each_node_mask(node, *nodemask) {
+				if (node == nid || !hugetlb_cma[node])
+					continue;
+
+				page = cma_alloc(hugetlb_cma[node], nr_pages,
+						huge_page_order(h), true);
+				if (page)
+					return page;
+			}
+		}
 	}
 #endif
 
-- 
GitLab


From 17743798d81238ab13050e8e2833699b54e15467 Mon Sep 17 00:00:00 2001
From: Muchun Song <songmuchun@bytedance.com>
Date: Fri, 4 Sep 2020 16:36:13 -0700
Subject: [PATCH 1091/1341] mm/hugetlb: fix a race between hugetlb sysctl
 handlers

There is a race between the assignment of `table->data` and write value
to the pointer of `table->data` in the __do_proc_doulongvec_minmax() on
the other thread.

  CPU0:                                 CPU1:
                                        proc_sys_write
  hugetlb_sysctl_handler                  proc_sys_call_handler
  hugetlb_sysctl_handler_common             hugetlb_sysctl_handler
    table->data = &tmp;                       hugetlb_sysctl_handler_common
                                                table->data = &tmp;
      proc_doulongvec_minmax
        do_proc_doulongvec_minmax           sysctl_head_finish
          __do_proc_doulongvec_minmax         unuse_table
            i = table->data;
            *i = val;  // corrupt CPU1's stack

Fix this by duplicating the `table`, and only update the duplicate of
it.  And introduce a helper of proc_hugetlb_doulongvec_minmax() to
simplify the code.

The following oops was seen:

    BUG: kernel NULL pointer dereference, address: 0000000000000000
    #PF: supervisor instruction fetch in kernel mode
    #PF: error_code(0x0010) - not-present page
    Code: Bad RIP value.
    ...
    Call Trace:
     ? set_max_huge_pages+0x3da/0x4f0
     ? alloc_pool_huge_page+0x150/0x150
     ? proc_doulongvec_minmax+0x46/0x60
     ? hugetlb_sysctl_handler_common+0x1c7/0x200
     ? nr_hugepages_store+0x20/0x20
     ? copy_fd_bitmaps+0x170/0x170
     ? hugetlb_sysctl_handler+0x1e/0x20
     ? proc_sys_call_handler+0x2f1/0x300
     ? unregister_sysctl_table+0xb0/0xb0
     ? __fd_install+0x78/0x100
     ? proc_sys_write+0x14/0x20
     ? __vfs_write+0x4d/0x90
     ? vfs_write+0xef/0x240
     ? ksys_write+0xc0/0x160
     ? __ia32_sys_read+0x50/0x50
     ? __close_fd+0x129/0x150
     ? __x64_sys_write+0x43/0x50
     ? do_syscall_64+0x6c/0x200
     ? entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: e5ff215941d5 ("hugetlb: multiple hstates for multiple page sizes")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/20200828031146.43035-1-songmuchun@bytedance.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/hugetlb.c | 26 ++++++++++++++++++++------
 1 file changed, 20 insertions(+), 6 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 5957dc80ebb18..67fc6383995b4 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3465,6 +3465,22 @@ static unsigned int allowed_mems_nr(struct hstate *h)
 }
 
 #ifdef CONFIG_SYSCTL
+static int proc_hugetlb_doulongvec_minmax(struct ctl_table *table, int write,
+					  void *buffer, size_t *length,
+					  loff_t *ppos, unsigned long *out)
+{
+	struct ctl_table dup_table;
+
+	/*
+	 * In order to avoid races with __do_proc_doulongvec_minmax(), we
+	 * can duplicate the @table and alter the duplicate of it.
+	 */
+	dup_table = *table;
+	dup_table.data = out;
+
+	return proc_doulongvec_minmax(&dup_table, write, buffer, length, ppos);
+}
+
 static int hugetlb_sysctl_handler_common(bool obey_mempolicy,
 			 struct ctl_table *table, int write,
 			 void *buffer, size_t *length, loff_t *ppos)
@@ -3476,9 +3492,8 @@ static int hugetlb_sysctl_handler_common(bool obey_mempolicy,
 	if (!hugepages_supported())
 		return -EOPNOTSUPP;
 
-	table->data = &tmp;
-	table->maxlen = sizeof(unsigned long);
-	ret = proc_doulongvec_minmax(table, write, buffer, length, ppos);
+	ret = proc_hugetlb_doulongvec_minmax(table, write, buffer, length, ppos,
+					     &tmp);
 	if (ret)
 		goto out;
 
@@ -3521,9 +3536,8 @@ int hugetlb_overcommit_handler(struct ctl_table *table, int write,
 	if (write && hstate_is_gigantic(h))
 		return -EINVAL;
 
-	table->data = &tmp;
-	table->maxlen = sizeof(unsigned long);
-	ret = proc_doulongvec_minmax(table, write, buffer, length, ppos);
+	ret = proc_hugetlb_doulongvec_minmax(table, write, buffer, length, ppos,
+					     &tmp);
 	if (ret)
 		goto out;
 
-- 
GitLab


From e5a59d308f52bb0052af5790c22173651b187465 Mon Sep 17 00:00:00 2001
From: David Howells <dhowells@redhat.com>
Date: Fri, 4 Sep 2020 16:36:16 -0700
Subject: [PATCH 1092/1341] mm/khugepaged.c: fix khugepaged's request size in
 collapse_file

collapse_file() in khugepaged passes PAGE_SIZE as the number of pages to
be read to page_cache_sync_readahead().  The intent was probably to read
a single page.  Fix it to use the number of pages to the end of the
window instead.

Fixes: 99cb0dbd47a1 ("mm,thp: add read-only THP support for (non-shmem) FS")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Yang Shi <shy828301@gmail.com>
Acked-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Cc: Eric Biggers <ebiggers@google.com>
Link: https://lkml.kernel.org/r/20200903140844.14194-2-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/khugepaged.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index e749e568e1eab..cfa0dba5fd3bc 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1709,7 +1709,7 @@ static void collapse_file(struct mm_struct *mm,
 				xas_unlock_irq(&xas);
 				page_cache_sync_readahead(mapping, &file->f_ra,
 							  file, index,
-							  PAGE_SIZE);
+							  end - index);
 				/* drain pagevecs to help isolate_lru_page() */
 				lru_add_drain();
 				page = find_lock_page(mapping, index);
-- 
GitLab


From 428fc0aff4e59399ec719ffcc1f7a5d29a4ee476 Mon Sep 17 00:00:00 2001
From: Jason Gunthorpe <jgg@nvidia.com>
Date: Fri, 4 Sep 2020 16:36:19 -0700
Subject: [PATCH 1093/1341] include/linux/log2.h: add missing () around n in
 roundup_pow_of_two()

Otherwise gcc generates warnings if the expression is complicated.

Fixes: 312a0c170945 ("[PATCH] LOG2: Alter roundup_pow_of_two() so that it can use a ilog2() on a constant")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.kernel.org/r/0-v1-8a2697e3c003+41165-log_brackets_jgg@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/log2.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/log2.h b/include/linux/log2.h
index 83a4a3ca3e8a7..c619ec6eff4ae 100644
--- a/include/linux/log2.h
+++ b/include/linux/log2.h
@@ -173,7 +173,7 @@ unsigned long __rounddown_pow_of_two(unsigned long n)
 #define roundup_pow_of_two(n)			\
 (						\
 	__builtin_constant_p(n) ? (		\
-		(n == 1) ? 1 :			\
+		((n) == 1) ? 1 :		\
 		(1UL << (ilog2((n) - 1) + 1))	\
 				   ) :		\
 	__roundup_pow_of_two(n)			\
-- 
GitLab


From b7ddce3cbf010edbfac6c6d8cc708560a7bcd7a4 Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Sun, 6 Sep 2020 00:45:14 +0300
Subject: [PATCH 1094/1341] io_uring: fix cancel of deferred reqs with ->files

While trying to cancel requests with ->files, it also should look for
requests in ->defer_list, otherwise it might end up hanging a thread.

Cancel all requests in ->defer_list up to the last request there with
matching ->files, that's needed to follow drain ordering semantics.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index f703182df2d4d..6129c67b0e3be 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8098,12 +8098,39 @@ static void io_attempt_cancel(struct io_ring_ctx *ctx, struct io_kiocb *req)
 	io_timeout_remove_link(ctx, req);
 }
 
+static void io_cancel_defer_files(struct io_ring_ctx *ctx,
+				  struct files_struct *files)
+{
+	struct io_defer_entry *de = NULL;
+	LIST_HEAD(list);
+
+	spin_lock_irq(&ctx->completion_lock);
+	list_for_each_entry_reverse(de, &ctx->defer_list, list) {
+		if ((de->req->flags & REQ_F_WORK_INITIALIZED)
+			&& de->req->work.files == files) {
+			list_cut_position(&list, &ctx->defer_list, &de->list);
+			break;
+		}
+	}
+	spin_unlock_irq(&ctx->completion_lock);
+
+	while (!list_empty(&list)) {
+		de = list_first_entry(&list, struct io_defer_entry, list);
+		list_del_init(&de->list);
+		req_set_fail_links(de->req);
+		io_put_req(de->req);
+		io_req_complete(de->req, -ECANCELED);
+		kfree(de);
+	}
+}
+
 static void io_uring_cancel_files(struct io_ring_ctx *ctx,
 				  struct files_struct *files)
 {
 	if (list_empty_careful(&ctx->inflight_list))
 		return;
 
+	io_cancel_defer_files(ctx, files);
 	/* cancel all at once, should be faster than doing it one by one*/
 	io_wq_cancel_cb(ctx->io_wq, io_wq_files_match, files, true);
 
-- 
GitLab


From c127a2a1b7baa5eb40a7e2de4b7f0c51ccbbb2ef Mon Sep 17 00:00:00 2001
From: Pavel Begunkov <asml.silence@gmail.com>
Date: Sun, 6 Sep 2020 00:45:15 +0300
Subject: [PATCH 1095/1341] io_uring: fix linked deferred ->files cancellation

While looking for ->files in ->defer_list, consider that requests there
may actually be links.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/io_uring.c | 25 +++++++++++++++++++++++--
 1 file changed, 23 insertions(+), 2 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 6129c67b0e3be..175fb647d099b 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8024,6 +8024,28 @@ static bool io_match_link(struct io_kiocb *preq, struct io_kiocb *req)
 	return false;
 }
 
+static inline bool io_match_files(struct io_kiocb *req,
+				       struct files_struct *files)
+{
+	return (req->flags & REQ_F_WORK_INITIALIZED) && req->work.files == files;
+}
+
+static bool io_match_link_files(struct io_kiocb *req,
+				struct files_struct *files)
+{
+	struct io_kiocb *link;
+
+	if (io_match_files(req, files))
+		return true;
+	if (req->flags & REQ_F_LINK_HEAD) {
+		list_for_each_entry(link, &req->link_list, link_list) {
+			if (io_match_files(link, files))
+				return true;
+		}
+	}
+	return false;
+}
+
 /*
  * We're looking to cancel 'req' because it's holding on to our files, but
  * 'req' could be a link to another request. See if it is, and cancel that
@@ -8106,8 +8128,7 @@ static void io_cancel_defer_files(struct io_ring_ctx *ctx,
 
 	spin_lock_irq(&ctx->completion_lock);
 	list_for_each_entry_reverse(de, &ctx->defer_list, list) {
-		if ((de->req->flags & REQ_F_WORK_INITIALIZED)
-			&& de->req->work.files == files) {
+		if (io_match_link_files(de->req, files)) {
 			list_cut_position(&list, &ctx->defer_list, &de->list);
 			break;
 		}
-- 
GitLab


From f4d51dffc6c01a9e94650d95ce0104964f8ae822 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 6 Sep 2020 17:11:40 -0700
Subject: [PATCH 1096/1341] Linux 5.9-rc4

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index ff5e0731d26df..ec2330ce0fc58 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 VERSION = 5
 PATCHLEVEL = 9
 SUBLEVEL = 0
-EXTRAVERSION = -rc3
+EXTRAVERSION = -rc4
 NAME = Kleptomaniac Octopus
 
 # *DOCUMENTATION*
-- 
GitLab


From 01ec372cef1e5afa4ab843bbaf88a6fcb64dc14c Mon Sep 17 00:00:00 2001
From: Ronnie Sahlberg <lsahlber@redhat.com>
Date: Thu, 3 Sep 2020 10:02:39 +1000
Subject: [PATCH 1097/1341] cifs: fix DFS mount with cifsacl/modefromsid

RHBZ: 1871246

If during cifs_lookup()/get_inode_info() we encounter a DFS link
and we use the cifsacl or modefromsid mount options we must suppress
any -EREMOTE errors that triggers or else we will not be able to follow
the DFS link and automount the target.

This fixes an issue with modefromsid/cifsacl where these mountoptions
would break DFS and we would no longer be able to access the share.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
---
 fs/cifs/inode.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 3989d08396acb..1f75b25e559a7 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1017,6 +1017,8 @@ cifs_get_inode_info(struct inode **inode,
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) {
 		rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, true,
 				       full_path, fid);
+		if (rc == -EREMOTE)
+			rc = 0;
 		if (rc) {
 			cifs_dbg(FYI, "%s: Get mode from SID failed. rc=%d\n",
 				 __func__, rc);
@@ -1025,6 +1027,8 @@ cifs_get_inode_info(struct inode **inode,
 	} else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 		rc = cifs_acl_to_fattr(cifs_sb, &fattr, *inode, false,
 				       full_path, fid);
+		if (rc == -EREMOTE)
+			rc = 0;
 		if (rc) {
 			cifs_dbg(FYI, "%s: Getting ACL failed with error: %d\n",
 				 __func__, rc);
-- 
GitLab


From 2cf9bfe9be75ed3656bbf882fb70c3e3047866e4 Mon Sep 17 00:00:00 2001
From: Raul E Rangel <rrangel@chromium.org>
Date: Mon, 31 Aug 2020 15:10:32 -0600
Subject: [PATCH 1098/1341] mmc: sdhci-acpi: Clear amd_sdhci_host on reset

The commit 61d7437ed1390 ("mmc: sdhci-acpi: Fix HS400 tuning for AMDI0040")
broke resume for eMMC HS400. When the system suspends the eMMC controller
is powered down. So, on resume we need to reinitialize the controller.
Although, amd_sdhci_host was not getting cleared, so the DLL was never
re-enabled on resume. This results in HS400 being non-functional.

To fix the problem, this change clears the tuned_clock flag, clears the
dll_enabled flag and disables the DLL on reset.

Fixes: 61d7437ed1390 ("mmc: sdhci-acpi: Fix HS400 tuning for AMDI0040")
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20200831150517.1.I93c78bfc6575771bb653c9d3fca5eb018a08417d@changeid
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/sdhci-acpi.c | 31 ++++++++++++++++++++++++-------
 1 file changed, 24 insertions(+), 7 deletions(-)

diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c
index 962f074ca1742..284cba11e2795 100644
--- a/drivers/mmc/host/sdhci-acpi.c
+++ b/drivers/mmc/host/sdhci-acpi.c
@@ -551,12 +551,18 @@ static int amd_select_drive_strength(struct mmc_card *card,
 	return MMC_SET_DRIVER_TYPE_A;
 }
 
-static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host)
+static void sdhci_acpi_amd_hs400_dll(struct sdhci_host *host, bool enable)
 {
+	struct sdhci_acpi_host *acpi_host = sdhci_priv(host);
+	struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host);
+
 	/* AMD Platform requires dll setting */
 	sdhci_writel(host, 0x40003210, SDHCI_AMD_RESET_DLL_REGISTER);
 	usleep_range(10, 20);
-	sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER);
+	if (enable)
+		sdhci_writel(host, 0x40033210, SDHCI_AMD_RESET_DLL_REGISTER);
+
+	amd_host->dll_enabled = enable;
 }
 
 /*
@@ -596,10 +602,8 @@ static void amd_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 
 		/* DLL is only required for HS400 */
 		if (host->timing == MMC_TIMING_MMC_HS400 &&
-		    !amd_host->dll_enabled) {
-			sdhci_acpi_amd_hs400_dll(host);
-			amd_host->dll_enabled = true;
-		}
+		    !amd_host->dll_enabled)
+			sdhci_acpi_amd_hs400_dll(host, true);
 	}
 }
 
@@ -620,10 +624,23 @@ static int amd_sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode)
 	return err;
 }
 
+static void amd_sdhci_reset(struct sdhci_host *host, u8 mask)
+{
+	struct sdhci_acpi_host *acpi_host = sdhci_priv(host);
+	struct amd_sdhci_host *amd_host = sdhci_acpi_priv(acpi_host);
+
+	if (mask & SDHCI_RESET_ALL) {
+		amd_host->tuned_clock = false;
+		sdhci_acpi_amd_hs400_dll(host, false);
+	}
+
+	sdhci_reset(host, mask);
+}
+
 static const struct sdhci_ops sdhci_acpi_ops_amd = {
 	.set_clock	= sdhci_set_clock,
 	.set_bus_width	= sdhci_set_bus_width,
-	.reset		= sdhci_reset,
+	.reset		= amd_sdhci_reset,
 	.set_uhs_signaling = sdhci_set_uhs_signaling,
 };
 
-- 
GitLab


From 9d5dcefb7b114d610aeb2371f6a6f119af316e43 Mon Sep 17 00:00:00 2001
From: Douglas Anderson <dianders@chromium.org>
Date: Thu, 27 Aug 2020 07:58:41 -0700
Subject: [PATCH 1099/1341] mmc: sdhci-msm: Add retries when all tuning phases
 are found valid

As the comments in this patch say, if we tune and find all phases are
valid it's _almost_ as bad as no phases being found valid.  Probably
all phases are not really reliable but we didn't detect where the
unreliable place is.  That means we'll essentially be guessing and
hoping we get a good phase.

This is not just a problem in theory.  It was causing real problems on
a real board.  On that board, most often phase 10 is found as the only
invalid phase, though sometimes 10 and 11 are invalid and sometimes
just 11.  Some percentage of the time, however, all phases are found
to be valid.  When this happens, the current logic will decide to use
phase 11.  Since phase 11 is sometimes found to be invalid, this is a
bad choice.  Sure enough, when phase 11 is picked we often get mmc
errors later in boot.

I have seen cases where all phases were found to be valid 3 times in a
row, so increase the retry count to 10 just to be extra sure.

Fixes: 415b5a75da43 ("mmc: sdhci-msm: Add platform_execute_tuning implementation")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Link: https://lore.kernel.org/r/20200827075809.1.If179abf5ecb67c963494db79c3bc4247d987419b@changeid
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/sdhci-msm.c | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 5a33389037cd0..729868abd2dba 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -1166,7 +1166,7 @@ static void sdhci_msm_set_cdr(struct sdhci_host *host, bool enable)
 static int sdhci_msm_execute_tuning(struct mmc_host *mmc, u32 opcode)
 {
 	struct sdhci_host *host = mmc_priv(mmc);
-	int tuning_seq_cnt = 3;
+	int tuning_seq_cnt = 10;
 	u8 phase, tuned_phases[16], tuned_phase_cnt = 0;
 	int rc;
 	struct mmc_ios ios = host->mmc->ios;
@@ -1222,6 +1222,22 @@ static int sdhci_msm_execute_tuning(struct mmc_host *mmc, u32 opcode)
 	} while (++phase < ARRAY_SIZE(tuned_phases));
 
 	if (tuned_phase_cnt) {
+		if (tuned_phase_cnt == ARRAY_SIZE(tuned_phases)) {
+			/*
+			 * All phases valid is _almost_ as bad as no phases
+			 * valid.  Probably all phases are not really reliable
+			 * but we didn't detect where the unreliable place is.
+			 * That means we'll essentially be guessing and hoping
+			 * we get a good phase.  Better to try a few times.
+			 */
+			dev_dbg(mmc_dev(mmc), "%s: All phases valid; try again\n",
+				mmc_hostname(mmc));
+			if (--tuning_seq_cnt) {
+				tuned_phase_cnt = 0;
+				goto retry;
+			}
+		}
+
 		rc = msm_find_most_appropriate_phase(host, tuned_phases,
 						     tuned_phase_cnt);
 		if (rc < 0)
-- 
GitLab


From a395acf0f6dc6409a704dea6fc3cd71eb8e3e4ec Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Tue, 1 Sep 2020 17:04:38 +0200
Subject: [PATCH 1100/1341] mmc: mmc_spi: Allow the driver to be built when
 CONFIG_HAS_DMA is unset

The commit cd57d07b1e4e ("sh: don't allow non-coherent DMA for NOMMU") made
CONFIG_NO_DMA to be set for some platforms, for good reasons.
Consequentially, CONFIG_HAS_DMA doesn't get set, which makes the DMA
mapping interface to be built as stub functions, but also prevent the
mmc_spi driver from being built as it depends on CONFIG_HAS_DMA.

It turns out that for some odd cases, the driver still relied on the DMA
mapping interface, even if the DMA was not actively being used.

To fixup the behaviour, let's drop the build dependency for CONFIG_HAS_DMA.
Moreover, as to allow the driver to succeed probing, let's move the DMA
initializations behind "#ifdef CONFIG_HAS_DMA".

Fixes: cd57d07b1e4e ("sh: don't allow non-coherent DMA for NOMMU")
Reported-by: Rich Felker <dalias@libc.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Rich Felker <dalias@libc.org>
Link: https://lore.kernel.org/r/20200901150438.228887-1-ulf.hansson@linaro.org
---
 drivers/mmc/host/Kconfig   |  2 +-
 drivers/mmc/host/mmc_spi.c | 86 +++++++++++++++++++++++---------------
 2 files changed, 53 insertions(+), 35 deletions(-)

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 9c89a5b780e85..9a34c827c96ef 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -602,7 +602,7 @@ config MMC_GOLDFISH
 
 config MMC_SPI
 	tristate "MMC/SD/SDIO over SPI"
-	depends on SPI_MASTER && HAS_DMA
+	depends on SPI_MASTER
 	select CRC7
 	select CRC_ITU_T
 	help
diff --git a/drivers/mmc/host/mmc_spi.c b/drivers/mmc/host/mmc_spi.c
index 39bb1e30c2d72..5055a7eb134ac 100644
--- a/drivers/mmc/host/mmc_spi.c
+++ b/drivers/mmc/host/mmc_spi.c
@@ -1278,6 +1278,52 @@ mmc_spi_detect_irq(int irq, void *mmc)
 	return IRQ_HANDLED;
 }
 
+#ifdef CONFIG_HAS_DMA
+static int mmc_spi_dma_alloc(struct mmc_spi_host *host)
+{
+	struct spi_device *spi = host->spi;
+	struct device *dev;
+
+	if (!spi->master->dev.parent->dma_mask)
+		return 0;
+
+	dev = spi->master->dev.parent;
+
+	host->ones_dma = dma_map_single(dev, host->ones, MMC_SPI_BLOCKSIZE,
+					DMA_TO_DEVICE);
+	if (dma_mapping_error(dev, host->ones_dma))
+		return -ENOMEM;
+
+	host->data_dma = dma_map_single(dev, host->data, sizeof(*host->data),
+					DMA_BIDIRECTIONAL);
+	if (dma_mapping_error(dev, host->data_dma)) {
+		dma_unmap_single(dev, host->ones_dma, MMC_SPI_BLOCKSIZE,
+				 DMA_TO_DEVICE);
+		return -ENOMEM;
+	}
+
+	dma_sync_single_for_cpu(dev, host->data_dma, sizeof(*host->data),
+				DMA_BIDIRECTIONAL);
+
+	host->dma_dev = dev;
+	return 0;
+}
+
+static void mmc_spi_dma_free(struct mmc_spi_host *host)
+{
+	if (!host->dma_dev)
+		return;
+
+	dma_unmap_single(host->dma_dev, host->ones_dma, MMC_SPI_BLOCKSIZE,
+			 DMA_TO_DEVICE);
+	dma_unmap_single(host->dma_dev, host->data_dma,	sizeof(*host->data),
+			 DMA_BIDIRECTIONAL);
+}
+#else
+static inline mmc_spi_dma_alloc(struct mmc_spi_host *host) { return 0; }
+static inline void mmc_spi_dma_free(struct mmc_spi_host *host) {}
+#endif
+
 static int mmc_spi_probe(struct spi_device *spi)
 {
 	void			*ones;
@@ -1374,23 +1420,9 @@ static int mmc_spi_probe(struct spi_device *spi)
 	if (!host->data)
 		goto fail_nobuf1;
 
-	if (spi->master->dev.parent->dma_mask) {
-		struct device	*dev = spi->master->dev.parent;
-
-		host->dma_dev = dev;
-		host->ones_dma = dma_map_single(dev, ones,
-				MMC_SPI_BLOCKSIZE, DMA_TO_DEVICE);
-		if (dma_mapping_error(dev, host->ones_dma))
-			goto fail_ones_dma;
-		host->data_dma = dma_map_single(dev, host->data,
-				sizeof(*host->data), DMA_BIDIRECTIONAL);
-		if (dma_mapping_error(dev, host->data_dma))
-			goto fail_data_dma;
-
-		dma_sync_single_for_cpu(host->dma_dev,
-				host->data_dma, sizeof(*host->data),
-				DMA_BIDIRECTIONAL);
-	}
+	status = mmc_spi_dma_alloc(host);
+	if (status)
+		goto fail_dma;
 
 	/* setup message for status/busy readback */
 	spi_message_init(&host->readback);
@@ -1458,20 +1490,12 @@ static int mmc_spi_probe(struct spi_device *spi)
 fail_add_host:
 	mmc_remove_host(mmc);
 fail_glue_init:
-	if (host->dma_dev)
-		dma_unmap_single(host->dma_dev, host->data_dma,
-				sizeof(*host->data), DMA_BIDIRECTIONAL);
-fail_data_dma:
-	if (host->dma_dev)
-		dma_unmap_single(host->dma_dev, host->ones_dma,
-				MMC_SPI_BLOCKSIZE, DMA_TO_DEVICE);
-fail_ones_dma:
+	mmc_spi_dma_free(host);
+fail_dma:
 	kfree(host->data);
-
 fail_nobuf1:
 	mmc_free_host(mmc);
 	mmc_spi_put_pdata(spi);
-
 nomem:
 	kfree(ones);
 	return status;
@@ -1489,13 +1513,7 @@ static int mmc_spi_remove(struct spi_device *spi)
 
 	mmc_remove_host(mmc);
 
-	if (host->dma_dev) {
-		dma_unmap_single(host->dma_dev, host->ones_dma,
-			MMC_SPI_BLOCKSIZE, DMA_TO_DEVICE);
-		dma_unmap_single(host->dma_dev, host->data_dma,
-			sizeof(*host->data), DMA_BIDIRECTIONAL);
-	}
-
+	mmc_spi_dma_free(host);
 	kfree(host->data);
 	kfree(host->ones);
 
-- 
GitLab


From 060522d89705f9d961ef1762dc1468645dd21fbd Mon Sep 17 00:00:00 2001
From: Chris Packham <chris.packham@alliedtelesis.co.nz>
Date: Thu, 3 Sep 2020 13:20:29 +1200
Subject: [PATCH 1101/1341] mmc: sdhci-of-esdhc: Don't walk device-tree on
 every interrupt

Commit b214fe592ab7 ("mmc: sdhci-of-esdhc: add erratum eSDHC7 support")
added code to check for a specific compatible string in the device-tree
on every esdhc interrupat. Instead of doing this record the quirk in
struct sdhci_esdhc and lookup the struct in esdhc_irq.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20200903012029.25673-1-chris.packham@alliedtelesis.co.nz
Fixes: b214fe592ab7 ("mmc: sdhci-of-esdhc: add erratum eSDHC7 support")
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/host/sdhci-of-esdhc.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 7c73d243dc6ce..45881b3099567 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -81,6 +81,7 @@ struct sdhci_esdhc {
 	bool quirk_tuning_erratum_type2;
 	bool quirk_ignore_data_inhibit;
 	bool quirk_delay_before_data_reset;
+	bool quirk_trans_complete_erratum;
 	bool in_sw_tuning;
 	unsigned int peripheral_clock;
 	const struct esdhc_clk_fixup *clk_fixup;
@@ -1177,10 +1178,11 @@ static void esdhc_set_uhs_signaling(struct sdhci_host *host,
 
 static u32 esdhc_irq(struct sdhci_host *host, u32 intmask)
 {
+	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+	struct sdhci_esdhc *esdhc = sdhci_pltfm_priv(pltfm_host);
 	u32 command;
 
-	if (of_find_compatible_node(NULL, NULL,
-				"fsl,p2020-esdhc")) {
+	if (esdhc->quirk_trans_complete_erratum) {
 		command = SDHCI_GET_CMD(sdhci_readw(host,
 					SDHCI_COMMAND));
 		if (command == MMC_WRITE_MULTIPLE_BLOCK &&
@@ -1334,8 +1336,10 @@ static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
 		esdhc->clk_fixup = match->data;
 	np = pdev->dev.of_node;
 
-	if (of_device_is_compatible(np, "fsl,p2020-esdhc"))
+	if (of_device_is_compatible(np, "fsl,p2020-esdhc")) {
 		esdhc->quirk_delay_before_data_reset = true;
+		esdhc->quirk_trans_complete_erratum = true;
+	}
 
 	clk = of_clk_get(np, 0);
 	if (!IS_ERR(clk)) {
-- 
GitLab


From f0c393e2104e48c8a881719a8bd37996f71b0aee Mon Sep 17 00:00:00 2001
From: Adrian Hunter <adrian.hunter@intel.com>
Date: Thu, 3 Sep 2020 11:20:07 +0300
Subject: [PATCH 1102/1341] mmc: sdio: Use mmc_pre_req() / mmc_post_req()

SDHCI changed from using a tasklet to finish requests, to using an IRQ
thread i.e. commit c07a48c2651965 ("mmc: sdhci: Remove finish_tasklet").
Because this increased the latency to complete requests, a preparatory
change was made to complete the request from the IRQ handler if
possible i.e. commit 19d2f695f4e827 ("mmc: sdhci: Call mmc_request_done()
from IRQ handler if possible").  That alleviated the situation for MMC
block devices because the MMC block driver makes use of mmc_pre_req()
and mmc_post_req() so that successful requests are completed in the IRQ
handler and any DMA unmapping is handled separately in mmc_post_req().
However SDIO was still affected, and an example has been reported with
up to 20% degradation in performance.

Looking at SDIO I/O helper functions, sdio_io_rw_ext_helper() appeared
to be a possible candidate for making use of asynchronous requests
within its I/O loops, but analysis revealed that these loops almost
never iterate more than once, so the complexity of the change would not
be warrented.

Instead, mmc_pre_req() and mmc_post_req() are added before and after I/O
submission (mmc_wait_for_req) in mmc_io_rw_extended().  This still has
the potential benefit of reducing the duration of interrupt handlers, as
well as addressing the latency issue for SDHCI.  It also seems a more
reasonable solution than forcing drivers to do everything in the IRQ
handler.

Reported-by: Dmitry Osipenko <digetx@gmail.com>
Fixes: c07a48c2651965 ("mmc: sdhci: Remove finish_tasklet")
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Dmitry Osipenko <digetx@gmail.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200903082007.18715-1-adrian.hunter@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/mmc/core/sdio_ops.c | 39 +++++++++++++++++++++----------------
 1 file changed, 22 insertions(+), 17 deletions(-)

diff --git a/drivers/mmc/core/sdio_ops.c b/drivers/mmc/core/sdio_ops.c
index 93d346c01110d..4c229dd2b6e54 100644
--- a/drivers/mmc/core/sdio_ops.c
+++ b/drivers/mmc/core/sdio_ops.c
@@ -121,6 +121,7 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
 	struct sg_table sgtable;
 	unsigned int nents, left_size, i;
 	unsigned int seg_size = card->host->max_seg_size;
+	int err;
 
 	WARN_ON(blksz == 0);
 
@@ -170,28 +171,32 @@ int mmc_io_rw_extended(struct mmc_card *card, int write, unsigned fn,
 
 	mmc_set_data_timeout(&data, card);
 
-	mmc_wait_for_req(card->host, &mrq);
+	mmc_pre_req(card->host, &mrq);
 
-	if (nents > 1)
-		sg_free_table(&sgtable);
+	mmc_wait_for_req(card->host, &mrq);
 
 	if (cmd.error)
-		return cmd.error;
-	if (data.error)
-		return data.error;
-
-	if (mmc_host_is_spi(card->host)) {
+		err = cmd.error;
+	else if (data.error)
+		err = data.error;
+	else if (mmc_host_is_spi(card->host))
 		/* host driver already reported errors */
-	} else {
-		if (cmd.resp[0] & R5_ERROR)
-			return -EIO;
-		if (cmd.resp[0] & R5_FUNCTION_NUMBER)
-			return -EINVAL;
-		if (cmd.resp[0] & R5_OUT_OF_RANGE)
-			return -ERANGE;
-	}
+		err = 0;
+	else if (cmd.resp[0] & R5_ERROR)
+		err = -EIO;
+	else if (cmd.resp[0] & R5_FUNCTION_NUMBER)
+		err = -EINVAL;
+	else if (cmd.resp[0] & R5_OUT_OF_RANGE)
+		err = -ERANGE;
+	else
+		err = 0;
 
-	return 0;
+	mmc_post_req(card->host, &mrq, err);
+
+	if (nents > 1)
+		sg_free_table(&sgtable);
+
+	return err;
 }
 
 int sdio_reset(struct mmc_host *host)
-- 
GitLab


From c3cdf189276c2a63da62ee250615bd55e3fb680d Mon Sep 17 00:00:00 2001
From: Luke D Jones <luke@ljones.dev>
Date: Mon, 7 Sep 2020 20:19:59 +1200
Subject: [PATCH 1103/1341] ALSA: hda: fixup headset for ASUS GX502 laptop

The GX502 requires a few steps to enable the headset i/o: pincfg,
verbs to enable and unmute the amp used for headpone out, and
a jacksense callback to toggle output via internal or jack using
a verb.

Signed-off-by: Luke D Jones <luke@ljones.dev>
Cc: <stable@vger.kernel.org>
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=208005
Link: https://lore.kernel.org/r/20200907081959.56186-1-luke@ljones.dev
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_realtek.c | 65 +++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index c521a1f170969..abfc602c3b923 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -5993,6 +5993,40 @@ static void alc_fixup_disable_mic_vref(struct hda_codec *codec,
 		snd_hda_codec_set_pin_target(codec, 0x19, PIN_VREFHIZ);
 }
 
+
+static void alc294_gx502_toggle_output(struct hda_codec *codec,
+					struct hda_jack_callback *cb)
+{
+	/* The Windows driver sets the codec up in a very different way where
+	 * it appears to leave 0x10 = 0x8a20 set. For Linux we need to toggle it
+	 */
+	if (snd_hda_jack_detect_state(codec, 0x21) == HDA_JACK_PRESENT)
+		alc_write_coef_idx(codec, 0x10, 0x8a20);
+	else
+		alc_write_coef_idx(codec, 0x10, 0x0a20);
+}
+
+static void alc294_fixup_gx502_hp(struct hda_codec *codec,
+					const struct hda_fixup *fix, int action)
+{
+	/* Pin 0x21: headphones/headset mic */
+	if (!is_jack_detectable(codec, 0x21))
+		return;
+
+	switch (action) {
+	case HDA_FIXUP_ACT_PRE_PROBE:
+		snd_hda_jack_detect_enable_callback(codec, 0x21,
+				alc294_gx502_toggle_output);
+		break;
+	case HDA_FIXUP_ACT_INIT:
+		/* Make sure to start in a correct state, i.e. if
+		 * headphones have been plugged in before powering up the system
+		 */
+		alc294_gx502_toggle_output(codec, NULL);
+		break;
+	}
+}
+
 static void  alc285_fixup_hp_gpio_amp_init(struct hda_codec *codec,
 			      const struct hda_fixup *fix, int action)
 {
@@ -6173,6 +6207,9 @@ enum {
 	ALC285_FIXUP_THINKPAD_HEADSET_JACK,
 	ALC294_FIXUP_ASUS_HPE,
 	ALC294_FIXUP_ASUS_COEF_1B,
+	ALC294_FIXUP_ASUS_GX502_HP,
+	ALC294_FIXUP_ASUS_GX502_PINS,
+	ALC294_FIXUP_ASUS_GX502_VERBS,
 	ALC285_FIXUP_HP_GPIO_LED,
 	ALC285_FIXUP_HP_MUTE_LED,
 	ALC236_FIXUP_HP_MUTE_LED,
@@ -7338,6 +7375,33 @@ static const struct hda_fixup alc269_fixups[] = {
 		.chained = true,
 		.chain_id = ALC294_FIXUP_ASUS_HEADSET_MIC
 	},
+	[ALC294_FIXUP_ASUS_GX502_PINS] = {
+		.type = HDA_FIXUP_PINS,
+		.v.pins = (const struct hda_pintbl[]) {
+			{ 0x19, 0x03a11050 }, /* front HP mic */
+			{ 0x1a, 0x01a11830 }, /* rear external mic */
+			{ 0x21, 0x03211020 }, /* front HP out */
+			{ }
+		},
+		.chained = true,
+		.chain_id = ALC294_FIXUP_ASUS_GX502_VERBS
+	},
+	[ALC294_FIXUP_ASUS_GX502_VERBS] = {
+		.type = HDA_FIXUP_VERBS,
+		.v.verbs = (const struct hda_verb[]) {
+			/* set 0x15 to HP-OUT ctrl */
+			{ 0x15, AC_VERB_SET_PIN_WIDGET_CONTROL, 0xc0 },
+			/* unmute the 0x15 amp */
+			{ 0x15, AC_VERB_SET_AMP_GAIN_MUTE, 0xb000 },
+			{ }
+		},
+		.chained = true,
+		.chain_id = ALC294_FIXUP_ASUS_GX502_HP
+	},
+	[ALC294_FIXUP_ASUS_GX502_HP] = {
+		.type = HDA_FIXUP_FUNC,
+		.v.func = alc294_fixup_gx502_hp,
+	},
 	[ALC294_FIXUP_ASUS_COEF_1B] = {
 		.type = HDA_FIXUP_VERBS,
 		.v.verbs = (const struct hda_verb[]) {
@@ -7711,6 +7775,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x1043, 0x1ccd, "ASUS X555UB", ALC256_FIXUP_ASUS_MIC),
 	SND_PCI_QUIRK(0x1043, 0x1e11, "ASUS Zephyrus G15", ALC289_FIXUP_ASUS_GA502),
 	SND_PCI_QUIRK(0x1043, 0x1f11, "ASUS Zephyrus G14", ALC289_FIXUP_ASUS_GA401),
+	SND_PCI_QUIRK(0x1043, 0x1881, "ASUS Zephyrus S/M", ALC294_FIXUP_ASUS_GX502_PINS),
 	SND_PCI_QUIRK(0x1043, 0x3030, "ASUS ZN270IE", ALC256_FIXUP_ASUS_AIO_GPIO2),
 	SND_PCI_QUIRK(0x1043, 0x831a, "ASUS P901", ALC269_FIXUP_STEREO_DMIC),
 	SND_PCI_QUIRK(0x1043, 0x834a, "ASUS S101", ALC269_FIXUP_STEREO_DMIC),
-- 
GitLab


From 07ecc6693f9157cf293da5d165c73fb28fd69bf4 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Mon, 3 Aug 2020 11:35:20 +0300
Subject: [PATCH 1104/1341] kobject: Drop unneeded conditional in
 __kobject_del()

__kobject_del() is called from two places, in one where kobj is dereferenced
before and thus can't be NULL, and in the other the NULL check is done before
call. Drop unneeded conditional in __kobject_del().

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20200803083520.5460-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 lib/kobject.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/lib/kobject.c b/lib/kobject.c
index 9dce68c378e61..ea53b30cf4837 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -604,9 +604,6 @@ static void __kobject_del(struct kobject *kobj)
 	struct kernfs_node *sd;
 	const struct kobj_type *ktype;
 
-	if (!kobj)
-		return;
-
 	sd = kobj->sd;
 	ktype = get_ktype(kobj);
 
-- 
GitLab


From f44d04e696feaf13d192d942c4f14ad2e117065a Mon Sep 17 00:00:00 2001
From: Ilya Dryomov <idryomov@gmail.com>
Date: Thu, 3 Sep 2020 13:24:11 +0200
Subject: [PATCH 1105/1341] rbd: require global CAP_SYS_ADMIN for mapping and
 unmapping

It turns out that currently we rely only on sysfs attribute
permissions:

  $ ll /sys/bus/rbd/{add*,remove*}
  --w------- 1 root root 4096 Sep  3 20:37 /sys/bus/rbd/add
  --w------- 1 root root 4096 Sep  3 20:37 /sys/bus/rbd/add_single_major
  --w------- 1 root root 4096 Sep  3 20:37 /sys/bus/rbd/remove
  --w------- 1 root root 4096 Sep  3 20:38 /sys/bus/rbd/remove_single_major

This means that images can be mapped and unmapped (i.e. block devices
can be created and deleted) by a UID 0 process even after it drops all
privileges or by any process with CAP_DAC_OVERRIDE in its user namespace
as long as UID 0 is mapped into that user namespace.

Be consistent with other virtual block devices (loop, nbd, dm, md, etc)
and require CAP_SYS_ADMIN in the initial user namespace for mapping and
unmapping, and also for dumping the configuration string and refreshing
the image header.

Cc: stable@vger.kernel.org
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
---
 drivers/block/rbd.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 0115390396932..e77eaab5cf23e 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -5120,6 +5120,9 @@ static ssize_t rbd_config_info_show(struct device *dev,
 {
 	struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
 
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
 	return sprintf(buf, "%s\n", rbd_dev->config_info);
 }
 
@@ -5231,6 +5234,9 @@ static ssize_t rbd_image_refresh(struct device *dev,
 	struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
 	int ret;
 
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
 	ret = rbd_dev_refresh(rbd_dev);
 	if (ret)
 		return ret;
@@ -7059,6 +7065,9 @@ static ssize_t do_rbd_add(struct bus_type *bus,
 	struct rbd_client *rbdc;
 	int rc;
 
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
 	if (!try_module_get(THIS_MODULE))
 		return -ENODEV;
 
@@ -7209,6 +7218,9 @@ static ssize_t do_rbd_remove(struct bus_type *bus,
 	bool force = false;
 	int ret;
 
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
 	dev_id = -1;
 	opt_buf[0] = '\0';
 	sscanf(buf, "%d %5s", &dev_id, opt_buf);
-- 
GitLab


From 20244b2a8a8728c63233d33146e007dcacbcc5c4 Mon Sep 17 00:00:00 2001
From: Cezary Rojewski <cezary.rojewski@intel.com>
Date: Mon, 7 Sep 2020 13:19:39 +0200
Subject: [PATCH 1106/1341] ASoC: core: Do not cleanup uninitialized dais on
 soc_pcm_open failure

Introduce for_each_rtd_dais_rollback macro which behaves exactly like
for_each_codec_dais_rollback and its cpu_dais equivalent but for all
dais instead.

Use newly added macro to fix soc_pcm_open error path and prevent
uninitialized dais from being cleaned-up.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Fixes: 5d9fa03e6c35 ("ASoC: soc-pcm: tidyup soc_pcm_open() order")
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/20200907111939.16169-1-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 include/sound/soc.h | 2 ++
 sound/soc/soc-pcm.c | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index 4176071f61bfd..fc4fcac72cf79 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1193,6 +1193,8 @@ struct snd_soc_pcm_runtime {
 	     ((i) < (rtd)->num_cpus + (rtd)->num_codecs) &&		\
 		     ((dai) = (rtd)->dais[i]);				\
 	     (i)++)
+#define for_each_rtd_dais_rollback(rtd, i, dai)		\
+	for (; (--(i) >= 0) && ((dai) = (rtd)->dais[i]);)
 
 void snd_soc_close_delayed_work(struct snd_soc_pcm_runtime *rtd);
 
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 00ac1cbf6f880..4c9d4cd8cf0b9 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -812,7 +812,7 @@ static int soc_pcm_open(struct snd_pcm_substream *substream)
 	return 0;
 
 config_err:
-	for_each_rtd_dais(rtd, i, dai)
+	for_each_rtd_dais_rollback(rtd, i, dai)
 		snd_soc_dai_shutdown(dai, substream);
 
 	snd_soc_link_shutdown(substream);
-- 
GitLab


From ea8be08cc9358f811e4175ba7fa7fea23c5d393e Mon Sep 17 00:00:00 2001
From: Marek Vasut <marex@denx.de>
Date: Sat, 5 Sep 2020 17:19:13 +0200
Subject: [PATCH 1107/1341] spi: stm32: Rate-limit the 'Communication
 suspended' message

The 'spi_stm32 44004000.spi: Communication suspended' message means that
when using PIO, the kernel did not read the FIFO fast enough and so the
SPI controller paused the transfer. Currently, this is printed on every
single such event, so if the kernel is busy and the controller is pausing
the transfers often, the kernel will be all the more busy scrolling this
message into the log buffer every few milliseconds. That is not helpful.

Instead, rate-limit the message and print it every once in a while. It is
not possible to use the default dev_warn_ratelimited(), because that is
still too verbose, as it prints 10 lines (DEFAULT_RATELIMIT_BURST) every
5 seconds (DEFAULT_RATELIMIT_INTERVAL). The policy here is to print 1 line
every 50 seconds (DEFAULT_RATELIMIT_INTERVAL * 10), because 1 line is more
than enough and the cycles saved on printing are better left to the CPU to
handle the SPI. However, dev_warn_once() is also not useful, as the user
should be aware that this condition is possibly recurring or ongoing. Thus
the custom rate-limit policy.

Finally, turn the message from dev_warn() to dev_dbg(), since the system
does not suffer any sort of malfunction if this message appears, it is
just slowing down. This further reduces the printing into the log buffer
and frees the CPU to do useful work.

Fixes: dcbe0d84dfa5 ("spi: add driver for STM32 SPI controller")
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Amelie Delaunay <amelie.delaunay@st.com>
Cc: Antonio Borneo <borneo.antonio@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200905151913.117775-1-marex@denx.de
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-stm32.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index d4b33b358a31e..a00f6b51ccbfc 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -936,7 +936,11 @@ static irqreturn_t stm32h7_spi_irq_thread(int irq, void *dev_id)
 	}
 
 	if (sr & STM32H7_SPI_SR_SUSP) {
-		dev_warn(spi->dev, "Communication suspended\n");
+		static DEFINE_RATELIMIT_STATE(rs,
+					      DEFAULT_RATELIMIT_INTERVAL * 10,
+					      1);
+		if (__ratelimit(&rs))
+			dev_dbg_ratelimited(spi->dev, "Communication suspended\n");
 		if (!spi->cur_usedma && (spi->rx_buf && (spi->rx_len > 0)))
 			stm32h7_spi_read_rxfifo(spi, false);
 		/*
-- 
GitLab


From 141d170495beb4772fad653312364dac6f4716f5 Mon Sep 17 00:00:00 2001
From: Stafford Horne <shorne@gmail.com>
Date: Sun, 30 Aug 2020 20:58:11 +0900
Subject: [PATCH 1108/1341] openrisc: Reserve memblock for initrd

Recently OpenRISC added support for external initrd images, but I found
some instability when using larger buildroot initrd images. It turned
out that I forgot to reserve the memblock space for the initrd image.

This patch fixes the instability issue by reserving memblock space.

Fixes: ff6c923dbec3 ("openrisc: Add support for external initrd images")
Signed-off-by: Stafford Horne <shorne@gmail.com>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
---
 arch/openrisc/kernel/setup.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c
index b18e775f8be3b..13c87f1f872b4 100644
--- a/arch/openrisc/kernel/setup.c
+++ b/arch/openrisc/kernel/setup.c
@@ -80,6 +80,16 @@ static void __init setup_memory(void)
 	 */
 	memblock_reserve(__pa(_stext), _end - _stext);
 
+#ifdef CONFIG_BLK_DEV_INITRD
+	/* Then reserve the initrd, if any */
+	if (initrd_start && (initrd_end > initrd_start)) {
+		unsigned long aligned_start = ALIGN_DOWN(initrd_start, PAGE_SIZE);
+		unsigned long aligned_end = ALIGN(initrd_end, PAGE_SIZE);
+
+		memblock_reserve(__pa(aligned_start), aligned_end - aligned_start);
+	}
+#endif /* CONFIG_BLK_DEV_INITRD */
+
 	early_init_fdt_reserve_self();
 	early_init_fdt_scan_reserved_mem();
 
-- 
GitLab


From 3ae90d764093dfcd6ab8ab6875377302892c87d4 Mon Sep 17 00:00:00 2001
From: Stafford Horne <shorne@gmail.com>
Date: Thu, 3 Sep 2020 05:48:58 +0900
Subject: [PATCH 1109/1341] openrisc: Fix cache API compile issue when not
 inlining

I found this when compiling a kbuild random config with GCC 11.  The
config enables CONFIG_DEBUG_SECTION_MISMATCH, which sets CFLAGS
-fno-inline-functions-called-once. This causes the call to cache_loop in
cache.c to not be inlined causing the below compile error.

    In file included from arch/openrisc/mm/cache.c:13:
    arch/openrisc/mm/cache.c: In function 'cache_loop':
    ./arch/openrisc/include/asm/spr.h:16:27: warning: 'asm' operand 0 probably does not match constraints
       16 | #define mtspr(_spr, _val) __asm__ __volatile__ (  \
	  |                           ^~~~~~~
    arch/openrisc/mm/cache.c:25:3: note: in expansion of macro 'mtspr'
       25 |   mtspr(reg, line);
	  |   ^~~~~
    ./arch/openrisc/include/asm/spr.h:16:27: error: impossible constraint in 'asm'
       16 | #define mtspr(_spr, _val) __asm__ __volatile__ (  \
	  |                           ^~~~~~~
    arch/openrisc/mm/cache.c:25:3: note: in expansion of macro 'mtspr'
       25 |   mtspr(reg, line);
	  |   ^~~~~
    make[1]: *** [scripts/Makefile.build:283: arch/openrisc/mm/cache.o] Error 1

The asm constraint "K" requires a immediate constant argument to mtspr,
however because of no inlining a register argument is passed causing a
failure.  Fix this by using __always_inline.

Link: https://lore.kernel.org/lkml/202008200453.ohnhqkjQ%25lkp@intel.com/
Signed-off-by: Stafford Horne <shorne@gmail.com>
---
 arch/openrisc/mm/cache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/openrisc/mm/cache.c b/arch/openrisc/mm/cache.c
index 08f56af387ac4..534a52ec5e667 100644
--- a/arch/openrisc/mm/cache.c
+++ b/arch/openrisc/mm/cache.c
@@ -16,7 +16,7 @@
 #include <asm/cacheflush.h>
 #include <asm/tlbflush.h>
 
-static void cache_loop(struct page *page, const unsigned int reg)
+static __always_inline void cache_loop(struct page *page, const unsigned int reg)
 {
 	unsigned long paddr = page_to_pfn(page) << PAGE_SHIFT;
 	unsigned long line = paddr & ~(L1_CACHE_BYTES - 1);
-- 
GitLab


From 1c30474826682bc970c3200700d8bcfa2b771278 Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Sun, 6 Sep 2020 20:42:52 -0700
Subject: [PATCH 1110/1341] PM: <linux/device.h>: fix @em_pd kernel-doc warning

Fix kernel-doc warning in <linux/device.h>:

../include/linux/device.h:613: warning: Function parameter or member 'em_pd' not described in 'device'

Fixes: 1bc138c62295 ("PM / EM: add support for other devices than CPUs in Energy Model")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/d97f40ad-3033-703a-c3cb-2843ce0f6371@infradead.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 include/linux/device.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/device.h b/include/linux/device.h
index ca18da4768e3e..9e6ea8931a52e 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -454,6 +454,7 @@ struct dev_links_info {
  * @pm_domain:	Provide callbacks that are executed during system suspend,
  * 		hibernation, system resume and during runtime PM transitions
  * 		along with subsystem-level and driver-level callbacks.
+ * @em_pd:	device's energy model performance domain
  * @pins:	For device pin management.
  *		See Documentation/driver-api/pinctl.rst for details.
  * @msi_list:	Hosts MSI descriptors
-- 
GitLab


From fccc0007b8dc952c6bc0805cdf842eb8ea06a639 Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@toxicpanda.com>
Date: Mon, 31 Aug 2020 10:52:42 -0400
Subject: [PATCH 1111/1341] btrfs: fix lockdep splat in add_missing_dev

Nikolay reported a lockdep splat in generic/476 that I could reproduce
with btrfs/187.

  ======================================================
  WARNING: possible circular locking dependency detected
  5.9.0-rc2+ #1 Tainted: G        W
  ------------------------------------------------------
  kswapd0/100 is trying to acquire lock:
  ffff9e8ef38b6268 (&delayed_node->mutex){+.+.}-{3:3}, at: __btrfs_release_delayed_node.part.0+0x3f/0x330

  but task is already holding lock:
  ffffffffa9d74700 (fs_reclaim){+.+.}-{0:0}, at: __fs_reclaim_acquire+0x5/0x30

  which lock already depends on the new lock.

  the existing dependency chain (in reverse order) is:

  -> #2 (fs_reclaim){+.+.}-{0:0}:
	 fs_reclaim_acquire+0x65/0x80
	 slab_pre_alloc_hook.constprop.0+0x20/0x200
	 kmem_cache_alloc_trace+0x3a/0x1a0
	 btrfs_alloc_device+0x43/0x210
	 add_missing_dev+0x20/0x90
	 read_one_chunk+0x301/0x430
	 btrfs_read_sys_array+0x17b/0x1b0
	 open_ctree+0xa62/0x1896
	 btrfs_mount_root.cold+0x12/0xea
	 legacy_get_tree+0x30/0x50
	 vfs_get_tree+0x28/0xc0
	 vfs_kern_mount.part.0+0x71/0xb0
	 btrfs_mount+0x10d/0x379
	 legacy_get_tree+0x30/0x50
	 vfs_get_tree+0x28/0xc0
	 path_mount+0x434/0xc00
	 __x64_sys_mount+0xe3/0x120
	 do_syscall_64+0x33/0x40
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  -> #1 (&fs_info->chunk_mutex){+.+.}-{3:3}:
	 __mutex_lock+0x7e/0x7e0
	 btrfs_chunk_alloc+0x125/0x3a0
	 find_free_extent+0xdf6/0x1210
	 btrfs_reserve_extent+0xb3/0x1b0
	 btrfs_alloc_tree_block+0xb0/0x310
	 alloc_tree_block_no_bg_flush+0x4a/0x60
	 __btrfs_cow_block+0x11a/0x530
	 btrfs_cow_block+0x104/0x220
	 btrfs_search_slot+0x52e/0x9d0
	 btrfs_lookup_inode+0x2a/0x8f
	 __btrfs_update_delayed_inode+0x80/0x240
	 btrfs_commit_inode_delayed_inode+0x119/0x120
	 btrfs_evict_inode+0x357/0x500
	 evict+0xcf/0x1f0
	 vfs_rmdir.part.0+0x149/0x160
	 do_rmdir+0x136/0x1a0
	 do_syscall_64+0x33/0x40
	 entry_SYSCALL_64_after_hwframe+0x44/0xa9

  -> #0 (&delayed_node->mutex){+.+.}-{3:3}:
	 __lock_acquire+0x1184/0x1fa0
	 lock_acquire+0xa4/0x3d0
	 __mutex_lock+0x7e/0x7e0
	 __btrfs_release_delayed_node.part.0+0x3f/0x330
	 btrfs_evict_inode+0x24c/0x500
	 evict+0xcf/0x1f0
	 dispose_list+0x48/0x70
	 prune_icache_sb+0x44/0x50
	 super_cache_scan+0x161/0x1e0
	 do_shrink_slab+0x178/0x3c0
	 shrink_slab+0x17c/0x290
	 shrink_node+0x2b2/0x6d0
	 balance_pgdat+0x30a/0x670
	 kswapd+0x213/0x4c0
	 kthread+0x138/0x160
	 ret_from_fork+0x1f/0x30

  other info that might help us debug this:

  Chain exists of:
    &delayed_node->mutex --> &fs_info->chunk_mutex --> fs_reclaim

   Possible unsafe locking scenario:

	 CPU0                    CPU1
	 ----                    ----
    lock(fs_reclaim);
				 lock(&fs_info->chunk_mutex);
				 lock(fs_reclaim);
    lock(&delayed_node->mutex);

   *** DEADLOCK ***

  3 locks held by kswapd0/100:
   #0: ffffffffa9d74700 (fs_reclaim){+.+.}-{0:0}, at: __fs_reclaim_acquire+0x5/0x30
   #1: ffffffffa9d65c50 (shrinker_rwsem){++++}-{3:3}, at: shrink_slab+0x115/0x290
   #2: ffff9e8e9da260e0 (&type->s_umount_key#48){++++}-{3:3}, at: super_cache_scan+0x38/0x1e0

  stack backtrace:
  CPU: 1 PID: 100 Comm: kswapd0 Tainted: G        W         5.9.0-rc2+ #1
  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.13.0-2.fc32 04/01/2014
  Call Trace:
   dump_stack+0x92/0xc8
   check_noncircular+0x12d/0x150
   __lock_acquire+0x1184/0x1fa0
   lock_acquire+0xa4/0x3d0
   ? __btrfs_release_delayed_node.part.0+0x3f/0x330
   __mutex_lock+0x7e/0x7e0
   ? __btrfs_release_delayed_node.part.0+0x3f/0x330
   ? __btrfs_release_delayed_node.part.0+0x3f/0x330
   ? lock_acquire+0xa4/0x3d0
   ? btrfs_evict_inode+0x11e/0x500
   ? find_held_lock+0x2b/0x80
   __btrfs_release_delayed_node.part.0+0x3f/0x330
   btrfs_evict_inode+0x24c/0x500
   evict+0xcf/0x1f0
   dispose_list+0x48/0x70
   prune_icache_sb+0x44/0x50
   super_cache_scan+0x161/0x1e0
   do_shrink_slab+0x178/0x3c0
   shrink_slab+0x17c/0x290
   shrink_node+0x2b2/0x6d0
   balance_pgdat+0x30a/0x670
   kswapd+0x213/0x4c0
   ? _raw_spin_unlock_irqrestore+0x46/0x60
   ? add_wait_queue_exclusive+0x70/0x70
   ? balance_pgdat+0x670/0x670
   kthread+0x138/0x160
   ? kthread_create_worker_on_cpu+0x40/0x40
   ret_from_fork+0x1f/0x30

This is because we are holding the chunk_mutex when we call
btrfs_alloc_device, which does a GFP_KERNEL allocation.  We don't want
to switch that to a GFP_NOFS lock because this is the only place where
it matters.  So instead use memalloc_nofs_save() around the allocation
in order to avoid the lockdep splat.

Reported-by: Nikolay Borisov <nborisov@suse.com>
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/volumes.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 214856c4ccb12..117b43367629e 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -4,6 +4,7 @@
  */
 
 #include <linux/sched.h>
+#include <linux/sched/mm.h>
 #include <linux/bio.h>
 #include <linux/slab.h>
 #include <linux/blkdev.h>
@@ -6484,8 +6485,17 @@ static struct btrfs_device *add_missing_dev(struct btrfs_fs_devices *fs_devices,
 					    u64 devid, u8 *dev_uuid)
 {
 	struct btrfs_device *device;
+	unsigned int nofs_flag;
 
+	/*
+	 * We call this under the chunk_mutex, so we want to use NOFS for this
+	 * allocation, however we don't want to change btrfs_alloc_device() to
+	 * always do NOFS because we use it in a lot of other GFP_KERNEL safe
+	 * places.
+	 */
+	nofs_flag = memalloc_nofs_save();
 	device = btrfs_alloc_device(NULL, &devid, dev_uuid);
+	memalloc_nofs_restore(nofs_flag);
 	if (IS_ERR(device))
 		return device;
 
-- 
GitLab


From ea57788eb76dc81f6003245427356a1dcd0ac524 Mon Sep 17 00:00:00 2001
From: Qu Wenruo <wqu@suse.com>
Date: Wed, 26 Aug 2020 17:26:43 +0800
Subject: [PATCH 1112/1341] btrfs: require only sector size alignment for
 parent eb bytenr

[BUG]
A completely sane converted fs will cause kernel warning at balance
time:

  [ 1557.188633] BTRFS info (device sda7): relocating block group 8162107392 flags data
  [ 1563.358078] BTRFS info (device sda7): found 11722 extents
  [ 1563.358277] BTRFS info (device sda7): leaf 7989321728 gen 95 total ptrs 213 free space 3458 owner 2
  [ 1563.358280] 	item 0 key (7984947200 169 0) itemoff 16250 itemsize 33
  [ 1563.358281] 		extent refs 1 gen 90 flags 2
  [ 1563.358282] 		ref#0: tree block backref root 4
  [ 1563.358285] 	item 1 key (7985602560 169 0) itemoff 16217 itemsize 33
  [ 1563.358286] 		extent refs 1 gen 93 flags 258
  [ 1563.358287] 		ref#0: shared block backref parent 7985602560
  [ 1563.358288] 			(parent 7985602560 is NOT ALIGNED to nodesize 16384)
  [ 1563.358290] 	item 2 key (7985635328 169 0) itemoff 16184 itemsize 33
  ...
  [ 1563.358995] BTRFS error (device sda7): eb 7989321728 invalid extent inline ref type 182
  [ 1563.358996] ------------[ cut here ]------------
  [ 1563.359005] WARNING: CPU: 14 PID: 2930 at 0xffffffff9f231766

Then with transaction abort, and obviously failed to balance the fs.

[CAUSE]
That mentioned inline ref type 182 is completely sane, it's
BTRFS_SHARED_BLOCK_REF_KEY, it's some extra check making kernel to
believe it's invalid.

Commit 64ecdb647ddb ("Btrfs: add one more sanity check for shared ref
type") introduced extra checks for backref type.

One of the requirement is, parent bytenr must be aligned to node size,
which is not correct.

One example is like this:

0	1G  1G+4K		2G 2G+4K
	|   |///////////////////|//|  <- A chunk starts at 1G+4K
            |   |	<- A tree block get reserved at bytenr 1G+4K

Then we have a valid tree block at bytenr 1G+4K, but not aligned to
nodesize (16K).

Such chunk is not ideal, but current kernel can handle it pretty well.
We may warn about such tree block in the future, but should not reject
them.

[FIX]
Change the alignment requirement from node size alignment to sector size
alignment.

Also, to make our lives a little easier, also output @iref when
btrfs_get_extent_inline_ref_type() failed, so we can locate the item
easier.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=205475
Fixes: 64ecdb647ddb ("Btrfs: add one more sanity check for shared ref type")
CC: stable@vger.kernel.org # 4.14+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
[ update comments and messages ]
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/extent-tree.c | 19 +++++++++----------
 fs/btrfs/print-tree.c  | 12 +++++++-----
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index e9eedc053fc52..780b9c9a98fe3 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -400,12 +400,11 @@ int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
 			if (type == BTRFS_SHARED_BLOCK_REF_KEY) {
 				ASSERT(eb->fs_info);
 				/*
-				 * Every shared one has parent tree
-				 * block, which must be aligned to
-				 * nodesize.
+				 * Every shared one has parent tree block,
+				 * which must be aligned to sector size.
 				 */
 				if (offset &&
-				    IS_ALIGNED(offset, eb->fs_info->nodesize))
+				    IS_ALIGNED(offset, eb->fs_info->sectorsize))
 					return type;
 			}
 		} else if (is_data == BTRFS_REF_TYPE_DATA) {
@@ -414,12 +413,11 @@ int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
 			if (type == BTRFS_SHARED_DATA_REF_KEY) {
 				ASSERT(eb->fs_info);
 				/*
-				 * Every shared one has parent tree
-				 * block, which must be aligned to
-				 * nodesize.
+				 * Every shared one has parent tree block,
+				 * which must be aligned to sector size.
 				 */
 				if (offset &&
-				    IS_ALIGNED(offset, eb->fs_info->nodesize))
+				    IS_ALIGNED(offset, eb->fs_info->sectorsize))
 					return type;
 			}
 		} else {
@@ -429,8 +427,9 @@ int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb,
 	}
 
 	btrfs_print_leaf((struct extent_buffer *)eb);
-	btrfs_err(eb->fs_info, "eb %llu invalid extent inline ref type %d",
-		  eb->start, type);
+	btrfs_err(eb->fs_info,
+		  "eb %llu iref 0x%lx invalid extent inline ref type %d",
+		  eb->start, (unsigned long)iref, type);
 	WARN_ON(1);
 
 	return BTRFS_REF_TYPE_INVALID;
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index 61f44e78e3c9e..80567c11ec122 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -95,9 +95,10 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 			 * offset is supposed to be a tree block which
 			 * must be aligned to nodesize.
 			 */
-			if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
-				pr_info("\t\t\t(parent %llu is NOT ALIGNED to nodesize %llu)\n",
-					offset, (unsigned long long)eb->fs_info->nodesize);
+			if (!IS_ALIGNED(offset, eb->fs_info->sectorsize))
+				pr_info(
+			"\t\t\t(parent %llu not aligned to sectorsize %u)\n",
+					offset, eb->fs_info->sectorsize);
 			break;
 		case BTRFS_EXTENT_DATA_REF_KEY:
 			dref = (struct btrfs_extent_data_ref *)(&iref->offset);
@@ -112,8 +113,9 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int type)
 			 * must be aligned to nodesize.
 			 */
 			if (!IS_ALIGNED(offset, eb->fs_info->nodesize))
-				pr_info("\t\t\t(parent %llu is NOT ALIGNED to nodesize %llu)\n",
-				     offset, (unsigned long long)eb->fs_info->nodesize);
+				pr_info(
+			"\t\t\t(parent %llu not aligned to sectorsize %u)\n",
+				     offset, eb->fs_info->sectorsize);
 			break;
 		default:
 			pr_cont("(extent %llu has INVALID ref type %d)\n",
-- 
GitLab


From 9e3aa8054453d23d9f477f0cdae70a6a1ea6ec8a Mon Sep 17 00:00:00 2001
From: Josef Bacik <josef@toxicpanda.com>
Date: Thu, 3 Sep 2020 14:29:50 -0400
Subject: [PATCH 1113/1341] btrfs: free data reloc tree on failed mount

While testing a weird problem with -o degraded, I noticed I was getting
leaked root errors

  BTRFS warning (device loop0): writable mount is not allowed due to too many missing devices
  BTRFS error (device loop0): open_ctree failed
  BTRFS error (device loop0): leaked root -9-0 refcount 1

This is the DATA_RELOC root, which gets read before the other fs roots,
but is included in the fs roots radix tree.  Handle this by adding a
btrfs_drop_and_free_fs_root() on the data reloc root if it exists.  This
is ok to do here if we fail further up because we will only drop the ref
if we delete the root from the radix tree, and all other cleanup won't
be duplicated.

CC: stable@vger.kernel.org # 5.8+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/disk-io.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 465bc8372e099..9fe9ec6aab710 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3441,6 +3441,8 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
 	btrfs_put_block_group_cache(fs_info);
 
 fail_tree_roots:
+	if (fs_info->data_reloc_root)
+		btrfs_drop_and_free_fs_root(fs_info, fs_info->data_reloc_root);
 	free_root_pointers(fs_info, true);
 	invalidate_inode_pages2(fs_info->btree_inode->i_mapping);
 
-- 
GitLab


From 162343a876f14f7604881dd2bc53ca140c82c230 Mon Sep 17 00:00:00 2001
From: Rustam Kovhaev <rkovhaev@gmail.com>
Date: Mon, 10 Aug 2020 08:36:50 -0700
Subject: [PATCH 1114/1341] scripts/tags.sh: exclude tools directory from tags
 generation

when COMPILED_SOURCE is set, running 'make ARCH=x86_64 COMPILED_SOURCE=1
cscope tags' in KBUILD_OUTPUT directory produces lots of "No such file
or directory" warnings:
...
realpath: sigchain.h: No such file or directory
realpath: orc_gen.c: No such file or directory
realpath: objtool.c: No such file or directory
...
let's exclude tools directory from tags generation

Fixes: 4f491bb6ea2a ("scripts/tags.sh: collect compiled source precisely")
Link: https://lore.kernel.org/lkml/20200809210056.GA1344537@thinkpad
Signed-off-by: Rustam Kovhaev <rkovhaev@gmail.com>
Link: https://lore.kernel.org/r/20200810153650.1822316-1-rkovhaev@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 scripts/tags.sh | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/scripts/tags.sh b/scripts/tags.sh
index 32d3f53af10ba..850f4ccb6afcf 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -26,7 +26,11 @@ else
 fi
 
 # ignore userspace tools
-ignore="$ignore ( -path ${tree}tools ) -prune -o"
+if [ -n "$COMPILED_SOURCE" ]; then
+	ignore="$ignore ( -path ./tools ) -prune -o"
+else
+	ignore="$ignore ( -path ${tree}tools ) -prune -o"
+fi
 
 # Detect if ALLSOURCE_ARCHS is set. If not, we assume SRCARCH
 if [ "${ALLSOURCE_ARCHS}" = "" ]; then
@@ -92,7 +96,7 @@ all_sources()
 all_compiled_sources()
 {
 	realpath -es $([ -z "$KBUILD_ABS_SRCTREE" ] && echo --relative-to=.) \
-		include/generated/autoconf.h $(find -name "*.cmd" -exec \
+		include/generated/autoconf.h $(find $ignore -name "*.cmd" -exec \
 		grep -Poh '(?(?=^source_.* \K).*|(?=^  \K\S).*(?= \\))' {} \+ |
 		awk '!a[$0]++') | sort -u
 }
-- 
GitLab


From 294955fd43dbf1e8f3a84cffa4797c6f22badc31 Mon Sep 17 00:00:00 2001
From: Utkarsh Patel <utkarsh.h.patel@intel.com>
Date: Mon, 7 Sep 2020 17:21:51 +0300
Subject: [PATCH 1115/1341] usb: typec: intel_pmc_mux: Do not configure Altmode
 HPD High

According to the PMC Type C Subsystem (TCSS) Mux programming guide rev
0.7, bit 14 is reserved in Alternate mode.
In DP Alternate Mode state, if the HPD_STATE (bit 7) field in the
status update command VDO is set to HPD_HIGH, HPD is configured via
separate HPD mode request after configuring DP Alternate mode request.
Configuring reserved bit may show unexpected behaviour.
So do not configure them while issuing the Alternate Mode request.

Fixes: 7990be48ef4d ("usb: typec: mux: intel: Handle alt mode HPD_HIGH")
Cc: stable@vger.kernel.org
Signed-off-by: Utkarsh Patel <utkarsh.h.patel@intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20200907142152.35678-2-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/mux/intel_pmc_mux.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
index fd9008f192087..bb9cb4ec4d6f8 100644
--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -68,7 +68,6 @@ enum {
 #define PMC_USB_ALTMODE_DP_MODE_SHIFT	8
 
 /* TBT specific Mode Data bits */
-#define PMC_USB_ALTMODE_HPD_HIGH	BIT(14)
 #define PMC_USB_ALTMODE_TBT_TYPE	BIT(17)
 #define PMC_USB_ALTMODE_CABLE_TYPE	BIT(18)
 #define PMC_USB_ALTMODE_ACTIVE_LINK	BIT(20)
@@ -185,9 +184,6 @@ pmc_usb_mux_dp(struct pmc_usb_port *port, struct typec_mux_state *state)
 	req.mode_data |= (state->mode - TYPEC_STATE_MODAL) <<
 			 PMC_USB_ALTMODE_DP_MODE_SHIFT;
 
-	if (data->status & DP_STATUS_HPD_STATE)
-		req.mode_data |= PMC_USB_ALTMODE_HPD_HIGH;
-
 	ret = pmc_usb_command(port, (void *)&req, sizeof(req));
 	if (ret)
 		return ret;
-- 
GitLab


From 7c6bbdf086ac7f1374bcf1ef0994b15109ecaf48 Mon Sep 17 00:00:00 2001
From: Utkarsh Patel <utkarsh.h.patel@intel.com>
Date: Mon, 7 Sep 2020 17:21:52 +0300
Subject: [PATCH 1116/1341] usb: typec: intel_pmc_mux: Do not configure SBU and
 HSL Orientation in Alternate modes

According to the PMC Type C Subsystem (TCSS) Mux programming guide rev
0.7, bits 4 and 5 are reserved in Alternate modes.
SBU Orientation and HSL Orientation needs to be configured only during
initial cable detection in USB connect flow based on device property of
"sbu-orientation" and "hsl-orientation".
Configuring these reserved bits in the Alternate modes may result in delay
in display link training or some unexpected behaviour.
So do not configure them while issuing Alternate Mode requests.

Fixes: ff4a30d5e243 ("usb: typec: mux: intel_pmc_mux: Support for static SBU/HSL orientation")
Signed-off-by: Utkarsh Patel <utkarsh.h.patel@intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20200907142152.35678-3-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/mux/intel_pmc_mux.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
index bb9cb4ec4d6f8..ec7da0fa3cf8c 100644
--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -61,8 +61,6 @@ enum {
 
 #define PMC_USB_ALTMODE_ORI_SHIFT	1
 #define PMC_USB_ALTMODE_UFP_SHIFT	3
-#define PMC_USB_ALTMODE_ORI_AUX_SHIFT	4
-#define PMC_USB_ALTMODE_ORI_HSL_SHIFT	5
 
 /* DP specific Mode Data bits */
 #define PMC_USB_ALTMODE_DP_MODE_SHIFT	8
@@ -178,9 +176,6 @@ pmc_usb_mux_dp(struct pmc_usb_port *port, struct typec_mux_state *state)
 	req.mode_data = (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT;
 	req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT;
 
-	req.mode_data |= sbu_orientation(port) << PMC_USB_ALTMODE_ORI_AUX_SHIFT;
-	req.mode_data |= hsl_orientation(port) << PMC_USB_ALTMODE_ORI_HSL_SHIFT;
-
 	req.mode_data |= (state->mode - TYPEC_STATE_MODAL) <<
 			 PMC_USB_ALTMODE_DP_MODE_SHIFT;
 
@@ -208,9 +203,6 @@ pmc_usb_mux_tbt(struct pmc_usb_port *port, struct typec_mux_state *state)
 	req.mode_data = (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT;
 	req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT;
 
-	req.mode_data |= sbu_orientation(port) << PMC_USB_ALTMODE_ORI_AUX_SHIFT;
-	req.mode_data |= hsl_orientation(port) << PMC_USB_ALTMODE_ORI_HSL_SHIFT;
-
 	if (TBT_ADAPTER(data->device_mode) == TBT_ADAPTER_TBT3)
 		req.mode_data |= PMC_USB_ALTMODE_TBT_TYPE;
 
-- 
GitLab


From 2d892ccdc163a3d2e08c5ed1cea8b61bf7e4f531 Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@suse.com>
Date: Fri, 4 Sep 2020 17:22:57 +0100
Subject: [PATCH 1117/1341] btrfs: fix NULL pointer dereference after failure
 to create snapshot

When trying to get a new fs root for a snapshot during the transaction
at transaction.c:create_pending_snapshot(), if btrfs_get_new_fs_root()
fails we leave "pending->snap" pointing to an error pointer, and then
later at ioctl.c:create_snapshot() we dereference that pointer, resulting
in a crash:

  [12264.614689] BUG: kernel NULL pointer dereference, address: 00000000000007c4
  [12264.615650] #PF: supervisor write access in kernel mode
  [12264.616487] #PF: error_code(0x0002) - not-present page
  [12264.617436] PGD 0 P4D 0
  [12264.618328] Oops: 0002 [#1] PREEMPT SMP DEBUG_PAGEALLOC PTI
  [12264.619150] CPU: 0 PID: 2310635 Comm: fsstress Tainted: G        W         5.9.0-rc3-btrfs-next-67 #1
  [12264.619960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
  [12264.621769] RIP: 0010:btrfs_mksubvol+0x438/0x4a0 [btrfs]
  [12264.622528] Code: bc ef ff ff (...)
  [12264.624092] RSP: 0018:ffffaa6fc7277cd8 EFLAGS: 00010282
  [12264.624669] RAX: 00000000fffffff4 RBX: ffff9d3e8f151a60 RCX: 0000000000000000
  [12264.625249] RDX: 0000000000000001 RSI: ffffffff9d56c9be RDI: fffffffffffffff4
  [12264.625830] RBP: ffff9d3e8f151b48 R08: 0000000000000000 R09: 0000000000000000
  [12264.626413] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000fffffff4
  [12264.626994] R13: ffff9d3ede380538 R14: ffff9d3ede380500 R15: ffff9d3f61b2eeb8
  [12264.627582] FS:  00007f140d5d8200(0000) GS:ffff9d3fb5e00000(0000) knlGS:0000000000000000
  [12264.628176] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [12264.628773] CR2: 00000000000007c4 CR3: 000000020f8e8004 CR4: 00000000003706f0
  [12264.629379] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
  [12264.629994] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
  [12264.630594] Call Trace:
  [12264.631227]  btrfs_mksnapshot+0x7b/0xb0 [btrfs]
  [12264.631840]  __btrfs_ioctl_snap_create+0x16f/0x1a0 [btrfs]
  [12264.632458]  btrfs_ioctl_snap_create_v2+0xb0/0xf0 [btrfs]
  [12264.633078]  btrfs_ioctl+0x1864/0x3130 [btrfs]
  [12264.633689]  ? do_sys_openat2+0x1a7/0x2d0
  [12264.634295]  ? kmem_cache_free+0x147/0x3a0
  [12264.634899]  ? __x64_sys_ioctl+0x83/0xb0
  [12264.635488]  __x64_sys_ioctl+0x83/0xb0
  [12264.636058]  do_syscall_64+0x33/0x80
  [12264.636616]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

  (gdb) list *(btrfs_mksubvol+0x438)
  0x7c7b8 is in btrfs_mksubvol (fs/btrfs/ioctl.c:858).
  853		ret = 0;
  854		pending_snapshot->anon_dev = 0;
  855	fail:
  856		/* Prevent double freeing of anon_dev */
  857		if (ret && pending_snapshot->snap)
  858			pending_snapshot->snap->anon_dev = 0;
  859		btrfs_put_root(pending_snapshot->snap);
  860		btrfs_subvolume_release_metadata(root, &pending_snapshot->block_rsv);
  861	free_pending:
  862		if (pending_snapshot->anon_dev)

So fix this by setting "pending->snap" to NULL if we get an error from the
call to btrfs_get_new_fs_root() at transaction.c:create_pending_snapshot().

Fixes: 2dfb1e43f57dd3 ("btrfs: preallocate anon block device at first phase of snapshot creation")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/transaction.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 20c6ac1a5de7f..d2fc292ac61b1 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1636,6 +1636,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
 	pending->snap = btrfs_get_new_fs_root(fs_info, objectid, pending->anon_dev);
 	if (IS_ERR(pending->snap)) {
 		ret = PTR_ERR(pending->snap);
+		pending->snap = NULL;
 		btrfs_abort_transaction(trans, ret);
 		goto fail;
 	}
-- 
GitLab


From 437ef802e0adc9f162a95213a3488e8646e5fc03 Mon Sep 17 00:00:00 2001
From: Alexey Kardashevskiy <aik@ozlabs.ru>
Date: Tue, 8 Sep 2020 11:51:06 +1000
Subject: [PATCH 1118/1341] powerpc/dma: Fix dma_map_ops::get_required_mask

There are 2 problems with it:
  1. "<" vs expected "<<"
  2. the shift number is an IOMMU page number mask, not an address
  mask as the IOMMU page shift is missing.

This did not hit us before f1565c24b596 ("powerpc: use the generic
dma_ops_bypass mode") because we had additional code to handle bypass
mask so this chunk (almost?) never executed.However there were
reports that aacraid does not work with "iommu=nobypass".

After f1565c24b596, aacraid (and probably others which call
dma_get_required_mask() before setting the mask) was unable to enable
64bit DMA and fall back to using IOMMU which was known not to work,
one of the problems is double free of an IOMMU page.

This fixes DMA for aacraid, both with and without "iommu=nobypass" in
the kernel command line. Verified with "stress-ng -d 4".

Fixes: 6a5c7be5e484 ("powerpc: Override dma_get_required_mask by platform hook and ops")
Cc: stable@vger.kernel.org # v3.2+
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200908015106.79661-1-aik@ozlabs.ru
---
 arch/powerpc/kernel/dma-iommu.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c
index 569fecd7b5b23..9053fc9d20c72 100644
--- a/arch/powerpc/kernel/dma-iommu.c
+++ b/arch/powerpc/kernel/dma-iommu.c
@@ -120,7 +120,8 @@ u64 dma_iommu_get_required_mask(struct device *dev)
 	if (!tbl)
 		return 0;
 
-	mask = 1ULL < (fls_long(tbl->it_offset + tbl->it_size) - 1);
+	mask = 1ULL << (fls_long(tbl->it_offset + tbl->it_size) +
+			tbl->it_page_shift - 1);
 	mask += mask - 1;
 
 	return mask;
-- 
GitLab


From 4993a8a378088be8b2f64fd9d00de9c6fb0a7ce9 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Tue, 8 Sep 2020 15:40:43 +1000
Subject: [PATCH 1119/1341] Revert "drm/i915: Remove
 i915_gem_object_get_dirty_page()"

These commits caused a regression on Lenovo t520 sandybridge
machine belonging to reporter. We are reverting them for 5.10
for other reasons, so just do it for 5.9 as well.

This reverts commit 763fedd6a216f94c2eb98d2f7ca21be3d3806e69.

Reported-by: Harald Arnesen <harald@skogtun.org>
Signed-off-by: Dave Airlie <airied@redhat.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_object.h |  4 ++++
 drivers/gpu/drm/i915/gem/i915_gem_pages.c  | 14 ++++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
index e5b9276d254c0..9cf4ad78ece6e 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
@@ -258,6 +258,10 @@ struct page *
 i915_gem_object_get_page(struct drm_i915_gem_object *obj,
 			 unsigned int n);
 
+struct page *
+i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj,
+			       unsigned int n);
+
 dma_addr_t
 i915_gem_object_get_dma_address_len(struct drm_i915_gem_object *obj,
 				    unsigned long n,
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pages.c b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
index d15ff6748a50b..e8a083743e092 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_pages.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_pages.c
@@ -548,6 +548,20 @@ i915_gem_object_get_page(struct drm_i915_gem_object *obj, unsigned int n)
 	return nth_page(sg_page(sg), offset);
 }
 
+/* Like i915_gem_object_get_page(), but mark the returned page dirty */
+struct page *
+i915_gem_object_get_dirty_page(struct drm_i915_gem_object *obj,
+			       unsigned int n)
+{
+	struct page *page;
+
+	page = i915_gem_object_get_page(obj, n);
+	if (!obj->mm.dirty)
+		set_page_dirty(page);
+
+	return page;
+}
+
 dma_addr_t
 i915_gem_object_get_dma_address_len(struct drm_i915_gem_object *obj,
 				    unsigned long n,
-- 
GitLab


From ad5d95e4d538737ed3fa25493777decf264a3011 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Tue, 8 Sep 2020 15:41:17 +1000
Subject: [PATCH 1120/1341] Revert "drm/i915/gem: Async GPU relocations only"

These commits caused a regression on Lenovo t520 sandybridge
machine belonging to reporter. We are reverting them for 5.10
for other reasons, so just do it for 5.9 as well.

This reverts commit 9e0f9464e2ab36b864359a59b0e9058fdef0ce47.

Reported-by: Harald Arnesen <harald@skogtun.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 295 ++++++++++++++++--
 .../i915/gem/selftests/i915_gem_execbuffer.c  |  21 +-
 2 files changed, 289 insertions(+), 27 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 6b4ec66cb558d..64901cf52b7ae 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -45,6 +45,13 @@ struct eb_vma_array {
 	struct eb_vma vma[];
 };
 
+enum {
+	FORCE_CPU_RELOC = 1,
+	FORCE_GTT_RELOC,
+	FORCE_GPU_RELOC,
+#define DBG_FORCE_RELOC 0 /* choose one of the above! */
+};
+
 #define __EXEC_OBJECT_HAS_PIN		BIT(31)
 #define __EXEC_OBJECT_HAS_FENCE		BIT(30)
 #define __EXEC_OBJECT_NEEDS_MAP		BIT(29)
@@ -253,6 +260,8 @@ struct i915_execbuffer {
 	 */
 	struct reloc_cache {
 		struct drm_mm_node node; /** temporary GTT binding */
+		unsigned long vaddr; /** Current kmap address */
+		unsigned long page; /** Currently mapped page index */
 		unsigned int gen; /** Cached value of INTEL_GEN */
 		bool use_64bit_reloc : 1;
 		bool has_llc : 1;
@@ -596,6 +605,23 @@ eb_add_vma(struct i915_execbuffer *eb,
 	}
 }
 
+static inline int use_cpu_reloc(const struct reloc_cache *cache,
+				const struct drm_i915_gem_object *obj)
+{
+	if (!i915_gem_object_has_struct_page(obj))
+		return false;
+
+	if (DBG_FORCE_RELOC == FORCE_CPU_RELOC)
+		return true;
+
+	if (DBG_FORCE_RELOC == FORCE_GTT_RELOC)
+		return false;
+
+	return (cache->has_llc ||
+		obj->cache_dirty ||
+		obj->cache_level != I915_CACHE_NONE);
+}
+
 static int eb_reserve_vma(const struct i915_execbuffer *eb,
 			  struct eb_vma *ev,
 			  u64 pin_flags)
@@ -926,6 +952,8 @@ relocation_target(const struct drm_i915_gem_relocation_entry *reloc,
 static void reloc_cache_init(struct reloc_cache *cache,
 			     struct drm_i915_private *i915)
 {
+	cache->page = -1;
+	cache->vaddr = 0;
 	/* Must be a variable in the struct to allow GCC to unroll. */
 	cache->gen = INTEL_GEN(i915);
 	cache->has_llc = HAS_LLC(i915);
@@ -1049,6 +1077,181 @@ static int reloc_gpu_flush(struct reloc_cache *cache)
 	return err;
 }
 
+static void reloc_cache_reset(struct reloc_cache *cache)
+{
+	void *vaddr;
+
+	if (!cache->vaddr)
+		return;
+
+	vaddr = unmask_page(cache->vaddr);
+	if (cache->vaddr & KMAP) {
+		if (cache->vaddr & CLFLUSH_AFTER)
+			mb();
+
+		kunmap_atomic(vaddr);
+		i915_gem_object_finish_access((struct drm_i915_gem_object *)cache->node.mm);
+	} else {
+		struct i915_ggtt *ggtt = cache_to_ggtt(cache);
+
+		intel_gt_flush_ggtt_writes(ggtt->vm.gt);
+		io_mapping_unmap_atomic((void __iomem *)vaddr);
+
+		if (drm_mm_node_allocated(&cache->node)) {
+			ggtt->vm.clear_range(&ggtt->vm,
+					     cache->node.start,
+					     cache->node.size);
+			mutex_lock(&ggtt->vm.mutex);
+			drm_mm_remove_node(&cache->node);
+			mutex_unlock(&ggtt->vm.mutex);
+		} else {
+			i915_vma_unpin((struct i915_vma *)cache->node.mm);
+		}
+	}
+
+	cache->vaddr = 0;
+	cache->page = -1;
+}
+
+static void *reloc_kmap(struct drm_i915_gem_object *obj,
+			struct reloc_cache *cache,
+			unsigned long page)
+{
+	void *vaddr;
+
+	if (cache->vaddr) {
+		kunmap_atomic(unmask_page(cache->vaddr));
+	} else {
+		unsigned int flushes;
+		int err;
+
+		err = i915_gem_object_prepare_write(obj, &flushes);
+		if (err)
+			return ERR_PTR(err);
+
+		BUILD_BUG_ON(KMAP & CLFLUSH_FLAGS);
+		BUILD_BUG_ON((KMAP | CLFLUSH_FLAGS) & PAGE_MASK);
+
+		cache->vaddr = flushes | KMAP;
+		cache->node.mm = (void *)obj;
+		if (flushes)
+			mb();
+	}
+
+	vaddr = kmap_atomic(i915_gem_object_get_dirty_page(obj, page));
+	cache->vaddr = unmask_flags(cache->vaddr) | (unsigned long)vaddr;
+	cache->page = page;
+
+	return vaddr;
+}
+
+static void *reloc_iomap(struct drm_i915_gem_object *obj,
+			 struct reloc_cache *cache,
+			 unsigned long page)
+{
+	struct i915_ggtt *ggtt = cache_to_ggtt(cache);
+	unsigned long offset;
+	void *vaddr;
+
+	if (cache->vaddr) {
+		intel_gt_flush_ggtt_writes(ggtt->vm.gt);
+		io_mapping_unmap_atomic((void __force __iomem *) unmask_page(cache->vaddr));
+	} else {
+		struct i915_vma *vma;
+		int err;
+
+		if (i915_gem_object_is_tiled(obj))
+			return ERR_PTR(-EINVAL);
+
+		if (use_cpu_reloc(cache, obj))
+			return NULL;
+
+		i915_gem_object_lock(obj);
+		err = i915_gem_object_set_to_gtt_domain(obj, true);
+		i915_gem_object_unlock(obj);
+		if (err)
+			return ERR_PTR(err);
+
+		vma = i915_gem_object_ggtt_pin(obj, NULL, 0, 0,
+					       PIN_MAPPABLE |
+					       PIN_NONBLOCK /* NOWARN */ |
+					       PIN_NOEVICT);
+		if (IS_ERR(vma)) {
+			memset(&cache->node, 0, sizeof(cache->node));
+			mutex_lock(&ggtt->vm.mutex);
+			err = drm_mm_insert_node_in_range
+				(&ggtt->vm.mm, &cache->node,
+				 PAGE_SIZE, 0, I915_COLOR_UNEVICTABLE,
+				 0, ggtt->mappable_end,
+				 DRM_MM_INSERT_LOW);
+			mutex_unlock(&ggtt->vm.mutex);
+			if (err) /* no inactive aperture space, use cpu reloc */
+				return NULL;
+		} else {
+			cache->node.start = vma->node.start;
+			cache->node.mm = (void *)vma;
+		}
+	}
+
+	offset = cache->node.start;
+	if (drm_mm_node_allocated(&cache->node)) {
+		ggtt->vm.insert_page(&ggtt->vm,
+				     i915_gem_object_get_dma_address(obj, page),
+				     offset, I915_CACHE_NONE, 0);
+	} else {
+		offset += page << PAGE_SHIFT;
+	}
+
+	vaddr = (void __force *)io_mapping_map_atomic_wc(&ggtt->iomap,
+							 offset);
+	cache->page = page;
+	cache->vaddr = (unsigned long)vaddr;
+
+	return vaddr;
+}
+
+static void *reloc_vaddr(struct drm_i915_gem_object *obj,
+			 struct reloc_cache *cache,
+			 unsigned long page)
+{
+	void *vaddr;
+
+	if (cache->page == page) {
+		vaddr = unmask_page(cache->vaddr);
+	} else {
+		vaddr = NULL;
+		if ((cache->vaddr & KMAP) == 0)
+			vaddr = reloc_iomap(obj, cache, page);
+		if (!vaddr)
+			vaddr = reloc_kmap(obj, cache, page);
+	}
+
+	return vaddr;
+}
+
+static void clflush_write32(u32 *addr, u32 value, unsigned int flushes)
+{
+	if (unlikely(flushes & (CLFLUSH_BEFORE | CLFLUSH_AFTER))) {
+		if (flushes & CLFLUSH_BEFORE) {
+			clflushopt(addr);
+			mb();
+		}
+
+		*addr = value;
+
+		/*
+		 * Writes to the same cacheline are serialised by the CPU
+		 * (including clflush). On the write path, we only require
+		 * that it hits memory in an orderly fashion and place
+		 * mb barriers at the start and end of the relocation phase
+		 * to ensure ordering of clflush wrt to the system.
+		 */
+		if (flushes & CLFLUSH_AFTER)
+			clflushopt(addr);
+	} else
+		*addr = value;
+}
+
 static int reloc_move_to_gpu(struct i915_request *rq, struct i915_vma *vma)
 {
 	struct drm_i915_gem_object *obj = vma->obj;
@@ -1214,6 +1417,17 @@ static u32 *reloc_gpu(struct i915_execbuffer *eb,
 	return cmd;
 }
 
+static inline bool use_reloc_gpu(struct i915_vma *vma)
+{
+	if (DBG_FORCE_RELOC == FORCE_GPU_RELOC)
+		return true;
+
+	if (DBG_FORCE_RELOC)
+		return false;
+
+	return !dma_resv_test_signaled_rcu(vma->resv, true);
+}
+
 static unsigned long vma_phys_addr(struct i915_vma *vma, u32 offset)
 {
 	struct page *page;
@@ -1228,10 +1442,10 @@ static unsigned long vma_phys_addr(struct i915_vma *vma, u32 offset)
 	return addr + offset_in_page(offset);
 }
 
-static int __reloc_entry_gpu(struct i915_execbuffer *eb,
-			     struct i915_vma *vma,
-			     u64 offset,
-			     u64 target_addr)
+static bool __reloc_entry_gpu(struct i915_execbuffer *eb,
+			      struct i915_vma *vma,
+			      u64 offset,
+			      u64 target_addr)
 {
 	const unsigned int gen = eb->reloc_cache.gen;
 	unsigned int len;
@@ -1247,7 +1461,7 @@ static int __reloc_entry_gpu(struct i915_execbuffer *eb,
 
 	batch = reloc_gpu(eb, vma, len);
 	if (IS_ERR(batch))
-		return PTR_ERR(batch);
+		return false;
 
 	addr = gen8_canonical_addr(vma->node.start + offset);
 	if (gen >= 8) {
@@ -1296,21 +1510,55 @@ static int __reloc_entry_gpu(struct i915_execbuffer *eb,
 		*batch++ = target_addr;
 	}
 
-	return 0;
+	return true;
+}
+
+static bool reloc_entry_gpu(struct i915_execbuffer *eb,
+			    struct i915_vma *vma,
+			    u64 offset,
+			    u64 target_addr)
+{
+	if (eb->reloc_cache.vaddr)
+		return false;
+
+	if (!use_reloc_gpu(vma))
+		return false;
+
+	return __reloc_entry_gpu(eb, vma, offset, target_addr);
 }
 
 static u64
-relocate_entry(struct i915_execbuffer *eb,
-	       struct i915_vma *vma,
+relocate_entry(struct i915_vma *vma,
 	       const struct drm_i915_gem_relocation_entry *reloc,
+	       struct i915_execbuffer *eb,
 	       const struct i915_vma *target)
 {
 	u64 target_addr = relocation_target(reloc, target);
-	int err;
-
-	err = __reloc_entry_gpu(eb, vma, reloc->offset, target_addr);
-	if (err)
-		return err;
+	u64 offset = reloc->offset;
+
+	if (!reloc_entry_gpu(eb, vma, offset, target_addr)) {
+		bool wide = eb->reloc_cache.use_64bit_reloc;
+		void *vaddr;
+
+repeat:
+		vaddr = reloc_vaddr(vma->obj,
+				    &eb->reloc_cache,
+				    offset >> PAGE_SHIFT);
+		if (IS_ERR(vaddr))
+			return PTR_ERR(vaddr);
+
+		GEM_BUG_ON(!IS_ALIGNED(offset, sizeof(u32)));
+		clflush_write32(vaddr + offset_in_page(offset),
+				lower_32_bits(target_addr),
+				eb->reloc_cache.vaddr);
+
+		if (wide) {
+			offset += sizeof(u32);
+			target_addr >>= 32;
+			wide = false;
+			goto repeat;
+		}
+	}
 
 	return target->node.start | UPDATE;
 }
@@ -1375,7 +1623,8 @@ eb_relocate_entry(struct i915_execbuffer *eb,
 	 * If the relocation already has the right value in it, no
 	 * more work needs to be done.
 	 */
-	if (gen8_canonical_addr(target->vma->node.start) == reloc->presumed_offset)
+	if (!DBG_FORCE_RELOC &&
+	    gen8_canonical_addr(target->vma->node.start) == reloc->presumed_offset)
 		return 0;
 
 	/* Check that the relocation address is valid... */
@@ -1407,7 +1656,7 @@ eb_relocate_entry(struct i915_execbuffer *eb,
 	ev->flags &= ~EXEC_OBJECT_ASYNC;
 
 	/* and update the user's relocation entry */
-	return relocate_entry(eb, ev->vma, reloc, target->vma);
+	return relocate_entry(ev->vma, reloc, eb, target->vma);
 }
 
 static int eb_relocate_vma(struct i915_execbuffer *eb, struct eb_vma *ev)
@@ -1445,8 +1694,10 @@ static int eb_relocate_vma(struct i915_execbuffer *eb, struct eb_vma *ev)
 		 * this is bad and so lockdep complains vehemently.
 		 */
 		copied = __copy_from_user(r, urelocs, count * sizeof(r[0]));
-		if (unlikely(copied))
-			return -EFAULT;
+		if (unlikely(copied)) {
+			remain = -EFAULT;
+			goto out;
+		}
 
 		remain -= count;
 		do {
@@ -1454,7 +1705,8 @@ static int eb_relocate_vma(struct i915_execbuffer *eb, struct eb_vma *ev)
 
 			if (likely(offset == 0)) {
 			} else if ((s64)offset < 0) {
-				return (int)offset;
+				remain = (int)offset;
+				goto out;
 			} else {
 				/*
 				 * Note that reporting an error now
@@ -1484,8 +1736,9 @@ static int eb_relocate_vma(struct i915_execbuffer *eb, struct eb_vma *ev)
 		} while (r++, --count);
 		urelocs += ARRAY_SIZE(stack);
 	} while (remain);
-
-	return 0;
+out:
+	reloc_cache_reset(&eb->reloc_cache);
+	return remain;
 }
 
 static int eb_relocate(struct i915_execbuffer *eb)
@@ -2392,7 +2645,7 @@ i915_gem_do_execbuffer(struct drm_device *dev,
 	eb.i915 = i915;
 	eb.file = file;
 	eb.args = args;
-	if (!(args->flags & I915_EXEC_NO_RELOC))
+	if (DBG_FORCE_RELOC || !(args->flags & I915_EXEC_NO_RELOC))
 		args->flags |= __EXEC_HAS_RELOC;
 
 	eb.exec = exec;
diff --git a/drivers/gpu/drm/i915/gem/selftests/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/selftests/i915_gem_execbuffer.c
index 57c14d3340cde..a49016f8ee0dc 100644
--- a/drivers/gpu/drm/i915/gem/selftests/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/selftests/i915_gem_execbuffer.c
@@ -37,14 +37,20 @@ static int __igt_gpu_reloc(struct i915_execbuffer *eb,
 		return err;
 
 	/* 8-Byte aligned */
-	err = __reloc_entry_gpu(eb, vma, offsets[0] * sizeof(u32), 0);
-	if (err)
+	if (!__reloc_entry_gpu(eb, vma,
+			       offsets[0] * sizeof(u32),
+			       0)) {
+		err = -EIO;
 		goto unpin_vma;
+	}
 
 	/* !8-Byte aligned */
-	err = __reloc_entry_gpu(eb, vma, offsets[1] * sizeof(u32), 1);
-	if (err)
+	if (!__reloc_entry_gpu(eb, vma,
+			       offsets[1] * sizeof(u32),
+			       1)) {
+		err = -EIO;
 		goto unpin_vma;
+	}
 
 	/* Skip to the end of the cmd page */
 	i = PAGE_SIZE / sizeof(u32) - RELOC_TAIL - 1;
@@ -54,9 +60,12 @@ static int __igt_gpu_reloc(struct i915_execbuffer *eb,
 	eb->reloc_cache.rq_size += i;
 
 	/* Force batch chaining */
-	err = __reloc_entry_gpu(eb, vma, offsets[2] * sizeof(u32), 2);
-	if (err)
+	if (!__reloc_entry_gpu(eb, vma,
+			       offsets[2] * sizeof(u32),
+			       2)) {
+		err = -EIO;
 		goto unpin_vma;
+	}
 
 	GEM_BUG_ON(!eb->reloc_cache.rq);
 	rq = i915_request_get(eb->reloc_cache.rq);
-- 
GitLab


From 20561da3a2e1e0e827ef5510cb0f74bcfd377e41 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Tue, 8 Sep 2020 15:41:43 +1000
Subject: [PATCH 1121/1341] Revert "drm/i915/gem: Delete unused code"

These commits caused a regression on Lenovo t520 sandybridge
machine belonging to reporter. We are reverting them for 5.10
for other reasons, so just do it for 5.9 as well.

This reverts commit 7ac2d2536dfa71c275a74813345779b1e7522c91.

Reported-by: Harald Arnesen <harald@skogtun.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
 .../gpu/drm/i915/gem/i915_gem_execbuffer.c    | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
index 64901cf52b7ae..446e76e95c381 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_execbuffer.c
@@ -965,6 +965,25 @@ static void reloc_cache_init(struct reloc_cache *cache,
 	cache->target = NULL;
 }
 
+static inline void *unmask_page(unsigned long p)
+{
+	return (void *)(uintptr_t)(p & PAGE_MASK);
+}
+
+static inline unsigned int unmask_flags(unsigned long p)
+{
+	return p & ~PAGE_MASK;
+}
+
+#define KMAP 0x4 /* after CLFLUSH_FLAGS */
+
+static inline struct i915_ggtt *cache_to_ggtt(struct reloc_cache *cache)
+{
+	struct drm_i915_private *i915 =
+		container_of(cache, struct i915_execbuffer, reloc_cache)->i915;
+	return &i915->ggtt;
+}
+
 #define RELOC_TAIL 4
 
 static int reloc_gpu_chain(struct reloc_cache *cache)
-- 
GitLab


From 06be67266a0c9a6a1ffb330a4ab50c2f21612e2b Mon Sep 17 00:00:00 2001
From: Tali Perry <tali.perry1@gmail.com>
Date: Mon, 31 Aug 2020 00:31:21 +0300
Subject: [PATCH 1122/1341] i2c: npcm7xx: Fix timeout calculation

timeout_usec value calculation was wrong, the calculated value
was in msec instead of usec.

Fixes: 56a1485b102e ("i2c: npcm7xx: Add Nuvoton NPCM I2C controller driver")
Signed-off-by: Tali Perry <tali.perry1@gmail.com>
Reviewed-by: Avi Fishman <avifishman70@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Alex Qiu <xqiu@google.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/busses/i2c-npcm7xx.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-npcm7xx.c b/drivers/i2c/busses/i2c-npcm7xx.c
index 75f07138a6fa2..dfcf04e1967f1 100644
--- a/drivers/i2c/busses/i2c-npcm7xx.c
+++ b/drivers/i2c/busses/i2c-npcm7xx.c
@@ -2093,8 +2093,12 @@ static int npcm_i2c_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
 		}
 	}
 
-	/* Adaptive TimeOut: astimated time in usec + 100% margin */
-	timeout_usec = (2 * 10000 / bus->bus_freq) * (2 + nread + nwrite);
+	/*
+	 * Adaptive TimeOut: estimated time in usec + 100% margin:
+	 * 2: double the timeout for clock stretching case
+	 * 9: bits per transaction (including the ack/nack)
+	 */
+	timeout_usec = (2 * 9 * USEC_PER_SEC / bus->bus_freq) * (2 + nread + nwrite);
 	timeout = max(msecs_to_jiffies(35), usecs_to_jiffies(timeout_usec));
 	if (nwrite >= 32 * 1024 || nread >= 32 * 1024) {
 		dev_err(bus->dev, "i2c%d buffer too big\n", bus->num);
-- 
GitLab


From 1d3ee7df009a46440c58508b8819213c09503acd Mon Sep 17 00:00:00 2001
From: "Gautham R. Shenoy" <ego@linux.vnet.ibm.com>
Date: Thu, 3 Sep 2020 14:57:27 +0530
Subject: [PATCH 1123/1341] cpuidle: pseries: Fix CEDE latency conversion from
 tb to us

Commit d947fb4c965c ("cpuidle: pseries: Fixup exit latency for
CEDE(0)") sets the exit latency of CEDE(0) based on the latency values
of the Extended CEDE states advertised by the platform. The values
advertised by the platform are in timebase ticks. However the cpuidle
framework requires the latency values in microseconds.

If the tb-ticks value advertised by the platform correspond to a value
smaller than 1us, during the conversion from tb-ticks to microseconds,
in the current code, the result becomes zero. This is incorrect as it
puts a CEDE state on par with the snooze state.

This patch fixes this by rounding up the result obtained while
converting the latency value from tb-ticks to microseconds. It also
prints a warning in case we discover an extended-cede state with
wakeup latency to be 0. In such a case, ensure that CEDE(0) has a
non-zero wakeup latency.

Fixes: d947fb4c965c ("cpuidle: pseries: Fixup exit latency for CEDE(0)")
Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/1599125247-28488-1-git-send-email-ego@linux.vnet.ibm.com
---
 drivers/cpuidle/cpuidle-pseries.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-pseries.c b/drivers/cpuidle/cpuidle-pseries.c
index ff6d99e923a49..a2b5c6f60cf0e 100644
--- a/drivers/cpuidle/cpuidle-pseries.c
+++ b/drivers/cpuidle/cpuidle-pseries.c
@@ -361,7 +361,10 @@ static void __init fixup_cede0_latency(void)
 	for (i = 0; i < nr_xcede_records; i++) {
 		struct xcede_latency_record *record = &payload->records[i];
 		u64 latency_tb = be64_to_cpu(record->latency_ticks);
-		u64 latency_us = tb_to_ns(latency_tb) / NSEC_PER_USEC;
+		u64 latency_us = DIV_ROUND_UP_ULL(tb_to_ns(latency_tb), NSEC_PER_USEC);
+
+		if (latency_us == 0)
+			pr_warn("cpuidle: xcede record %d has an unrealistic latency of 0us.\n", i);
 
 		if (latency_us < min_latency_us)
 			min_latency_us = latency_us;
@@ -378,10 +381,14 @@ static void __init fixup_cede0_latency(void)
 	 * Perform the fix-up.
 	 */
 	if (min_latency_us < dedicated_states[1].exit_latency) {
-		u64 cede0_latency = min_latency_us - 1;
+		/*
+		 * We set a minimum of 1us wakeup latency for cede0 to
+		 * distinguish it from snooze
+		 */
+		u64 cede0_latency = 1;
 
-		if (cede0_latency <= 0)
-			cede0_latency = min_latency_us;
+		if (min_latency_us > cede0_latency)
+			cede0_latency = min_latency_us - 1;
 
 		dedicated_states[1].exit_latency = cede0_latency;
 		dedicated_states[1].target_residency = 10 * (cede0_latency);
-- 
GitLab


From 0c4c801b31f89cfc1b97207abbab687f43d8e258 Mon Sep 17 00:00:00 2001
From: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Date: Tue, 1 Sep 2020 18:10:36 +0300
Subject: [PATCH 1124/1341] drm/i915: fix regression leading to display audio
 probe failure on GLK
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

In commit 4f0b4352bd26 ("drm/i915: Extract cdclk requirements checking
to separate function") the order of force_min_cdclk_changed check and
intel_modeset_checks(), was reversed. This broke the mechanism to
immediately force a new CDCLK minimum, and lead to driver probe
errors for display audio on GLK platform with 5.9-rc1 kernel. Fix
the issue by moving intel_modeset_checks() call later.

[vsyrjala: It also broke the ability of planes to bump up the cdclk
and thus could lead to underruns when eg. flipping from 32bpp to
64bpp framebuffer. To be clear, we still compute the new cdclk
correctly but fail to actually program it to the hardware due to
intel_set_cdclk_{pre,post}_plane_update() not getting called on
account of state->modeset==false.]

Fixes: 4f0b4352bd26 ("drm/i915: Extract cdclk requirements checking to separate function")
BugLink: https://github.com/thesofproject/linux/issues/2410
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200901151036.1312357-1-kai.vehmanen@linux.intel.com
(cherry picked from commit cf696856bc54a31f78e6538b84c8f7a006b6108b)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 68325678f5ef9..b18c5ac2934dc 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -14956,12 +14956,6 @@ static int intel_atomic_check(struct drm_device *dev,
 	if (dev_priv->wm.distrust_bios_wm)
 		any_ms = true;
 
-	if (any_ms) {
-		ret = intel_modeset_checks(state);
-		if (ret)
-			goto fail;
-	}
-
 	intel_fbc_choose_crtc(dev_priv, state);
 	ret = calc_watermark_data(state);
 	if (ret)
@@ -14976,6 +14970,10 @@ static int intel_atomic_check(struct drm_device *dev,
 		goto fail;
 
 	if (any_ms) {
+		ret = intel_modeset_checks(state);
+		if (ret)
+			goto fail;
+
 		ret = intel_modeset_calc_cdclk(state);
 		if (ret)
 			return ret;
-- 
GitLab


From 88ce2a530cc9865a894454b2e40eba5957a60e1a Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Tue, 8 Sep 2020 16:15:06 +0200
Subject: [PATCH 1125/1341] block: restore a specific error code in
 bdev_del_partition

mdadm relies on the fact that deleting an invalid partition returns
-ENXIO or -ENOTTY to detect if a block device is a partition or a
whole device.

Fixes: 08fc1ab6d748 ("block: fix locking in bdev_del_partition")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/partitions/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/partitions/core.c b/block/partitions/core.c
index 5b4869c08fb38..722406b841dfc 100644
--- a/block/partitions/core.c
+++ b/block/partitions/core.c
@@ -537,7 +537,7 @@ int bdev_del_partition(struct block_device *bdev, int partno)
 
 	bdevp = bdget_disk(bdev->bd_disk, partno);
 	if (!bdevp)
-		return -ENOMEM;
+		return -ENXIO;
 
 	mutex_lock(&bdevp->bd_mutex);
 	mutex_lock_nested(&bdev->bd_mutex, 1);
-- 
GitLab


From 83048015ff7710b46e7c489458a93c6fe348229d Mon Sep 17 00:00:00 2001
From: Vignesh Raghavendra <vigneshr@ti.com>
Date: Mon, 31 Aug 2020 18:37:20 +0530
Subject: [PATCH 1126/1341] spi: spi-cadence-quadspi: Fix mapping of buffers
 for DMA reads

Buffers need to mapped to DMA channel's device pointer instead of SPI
controller's device pointer as its system DMA that actually does data
transfer.
Data inconsistencies have been reported when reading from flash
without this fix.

Fixes: ffa639e069fb ("mtd: spi-nor: cadence-quadspi: Add DMA support for direct mode reads")
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Tested-by: Jan Kiszka <jan.kiszka@siemens.com>
Link: https://lore.kernel.org/r/20200831130720.4524-1-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-cadence-quadspi.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/spi/spi-cadence-quadspi.c b/drivers/spi/spi-cadence-quadspi.c
index 508b219eabf80..c6795c684b16a 100644
--- a/drivers/spi/spi-cadence-quadspi.c
+++ b/drivers/spi/spi-cadence-quadspi.c
@@ -907,14 +907,16 @@ static int cqspi_direct_read_execute(struct cqspi_flash_pdata *f_pdata,
 	struct dma_async_tx_descriptor *tx;
 	dma_cookie_t cookie;
 	dma_addr_t dma_dst;
+	struct device *ddev;
 
 	if (!cqspi->rx_chan || !virt_addr_valid(buf)) {
 		memcpy_fromio(buf, cqspi->ahb_base + from, len);
 		return 0;
 	}
 
-	dma_dst = dma_map_single(dev, buf, len, DMA_FROM_DEVICE);
-	if (dma_mapping_error(dev, dma_dst)) {
+	ddev = cqspi->rx_chan->device->dev;
+	dma_dst = dma_map_single(ddev, buf, len, DMA_FROM_DEVICE);
+	if (dma_mapping_error(ddev, dma_dst)) {
 		dev_err(dev, "dma mapping failed\n");
 		return -ENOMEM;
 	}
@@ -948,7 +950,7 @@ static int cqspi_direct_read_execute(struct cqspi_flash_pdata *f_pdata,
 	}
 
 err_unmap:
-	dma_unmap_single(dev, dma_dst, len, DMA_FROM_DEVICE);
+	dma_unmap_single(ddev, dma_dst, len, DMA_FROM_DEVICE);
 
 	return ret;
 }
-- 
GitLab


From 1a5ce48fd667128e369fdc7fb87e21539aed21b5 Mon Sep 17 00:00:00 2001
From: Camel Guo <camelg@axis.com>
Date: Tue, 8 Sep 2020 10:35:21 +0200
Subject: [PATCH 1127/1341] ASoC: tlv320adcx140: Wake up codec before accessing
 register

According to its datasheet, after reset this codec goes into sleep
mode. In this mode, any register accessing should be avoided except for
exiting sleep mode. Hence this commit moves SLEEP_CFG access before any
register accessing.

Signed-off-by: Camel Guo <camelg@axis.com>
Acked-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200908083521.14105-2-camel.guo@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/tlv320adcx140.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/sound/soc/codecs/tlv320adcx140.c b/sound/soc/codecs/tlv320adcx140.c
index 7ae6ec374be36..8efe20605f9be 100644
--- a/sound/soc/codecs/tlv320adcx140.c
+++ b/sound/soc/codecs/tlv320adcx140.c
@@ -842,6 +842,18 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
 	if (ret)
 		goto out;
 
+	if (adcx140->supply_areg == NULL)
+		sleep_cfg_val |= ADCX140_AREG_INTERNAL;
+
+	ret = regmap_write(adcx140->regmap, ADCX140_SLEEP_CFG, sleep_cfg_val);
+	if (ret) {
+		dev_err(adcx140->dev, "setting sleep config failed %d\n", ret);
+		goto out;
+	}
+
+	/* 8.4.3: Wait >= 1ms after entering active mode. */
+	usleep_range(1000, 100000);
+
 	pdm_count = device_property_count_u32(adcx140->dev,
 					      "ti,pdm-edge-select");
 	if (pdm_count <= ADCX140_NUM_PDM_EDGES && pdm_count > 0) {
@@ -889,18 +901,6 @@ static int adcx140_codec_probe(struct snd_soc_component *component)
 	if (ret)
 		goto out;
 
-	if (adcx140->supply_areg == NULL)
-		sleep_cfg_val |= ADCX140_AREG_INTERNAL;
-
-	ret = regmap_write(adcx140->regmap, ADCX140_SLEEP_CFG, sleep_cfg_val);
-	if (ret) {
-		dev_err(adcx140->dev, "setting sleep config failed %d\n", ret);
-		goto out;
-	}
-
-	/* 8.4.3: Wait >= 1ms after entering active mode. */
-	usleep_range(1000, 100000);
-
 	ret = regmap_update_bits(adcx140->regmap, ADCX140_BIAS_CFG,
 				ADCX140_MIC_BIAS_VAL_MSK |
 				ADCX140_MIC_BIAS_VREF_MSK, bias_cfg);
-- 
GitLab


From b63de8400a6e1001b5732286cf6f5ec27799b7b4 Mon Sep 17 00:00:00 2001
From: James Smart <james.smart@broadcom.com>
Date: Fri, 28 Aug 2020 12:01:50 -0700
Subject: [PATCH 1128/1341] nvme: Revert: Fix controller creation races with
 teardown flow

The indicated patch introduced a barrier in the sysfs_delete attribute
for the controller that rejects the request if the controller isn't
created. "Created" is defined as at least 1 call to nvme_start_ctrl().

This is problematic in error-injection testing.  If an error occurs on
the initial attempt to create an association and the controller enters
reconnect(s) attempts, the admin cannot delete the controller until
either there is a successful association created or ctrl_loss_tmo
times out.

Where this issue is particularly hurtful is when the "admin" is the
nvme-cli, it is performing a connection to a discovery controller, and
it is initiated via auto-connect scripts.  With the FC transport, if the
first connection attempt fails, the controller enters a normal reconnect
state but returns control to the cli thread that created the controller.
In this scenario, the cli attempts to read the discovery log via ioctl,
which fails, causing the cli to see it as an empty log and then proceeds
to delete the discovery controller. The delete is rejected and the
controller is left live. If the discovery controller reconnect then
succeeds, there is no action to delete it, and it sits live doing nothing.

Cc: <stable@vger.kernel.org> # v5.7+
Fixes: ce1518139e69 ("nvme: Fix controller creation races with teardown flow")
Signed-off-by: James Smart <james.smart@broadcom.com>
CC: Israel Rukshin <israelr@mellanox.com>
CC: Max Gurtovoy <maxg@mellanox.com>
CC: Christoph Hellwig <hch@lst.de>
CC: Keith Busch <kbusch@kernel.org>
CC: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/core.c | 5 -----
 drivers/nvme/host/nvme.h | 1 -
 2 files changed, 6 deletions(-)

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 5702a3843746f..8b75f6ca0b611 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -3525,10 +3525,6 @@ static ssize_t nvme_sysfs_delete(struct device *dev,
 {
 	struct nvme_ctrl *ctrl = dev_get_drvdata(dev);
 
-	/* Can't delete non-created controllers */
-	if (!ctrl->created)
-		return -EBUSY;
-
 	if (device_remove_file_self(dev, attr))
 		nvme_delete_ctrl_sync(ctrl);
 	return count;
@@ -4403,7 +4399,6 @@ void nvme_start_ctrl(struct nvme_ctrl *ctrl)
 		nvme_queue_scan(ctrl);
 		nvme_start_queues(ctrl);
 	}
-	ctrl->created = true;
 }
 EXPORT_SYMBOL_GPL(nvme_start_ctrl);
 
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 2910f6caab7d6..9fd45ff656da8 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -307,7 +307,6 @@ struct nvme_ctrl {
 	struct nvme_command ka_cmd;
 	struct work_struct fw_act_work;
 	unsigned long events;
-	bool created;
 
 #ifdef CONFIG_NVME_MULTIPATH
 	/* asymmetric namespace access: */
-- 
GitLab


From e126e8210e950bb83414c4f57b3120ddb8450742 Mon Sep 17 00:00:00 2001
From: David Milburn <dmilburn@redhat.com>
Date: Wed, 2 Sep 2020 17:42:54 -0500
Subject: [PATCH 1129/1341] nvme-fc: cancel async events before freeing event
 struct

Cancel async event work in case async event has been queued up, and
nvme_fc_submit_async_event() runs after event has been freed.

Signed-off-by: David Milburn <dmilburn@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/fc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c
index a7f474ddfff76..e8ef42b9d50c2 100644
--- a/drivers/nvme/host/fc.c
+++ b/drivers/nvme/host/fc.c
@@ -2160,6 +2160,7 @@ nvme_fc_term_aen_ops(struct nvme_fc_ctrl *ctrl)
 	struct nvme_fc_fcp_op *aen_op;
 	int i;
 
+	cancel_work_sync(&ctrl->ctrl.async_event_work);
 	aen_op = ctrl->aen_ops;
 	for (i = 0; i < NVME_NR_AEN_COMMANDS; i++, aen_op++) {
 		__nvme_fc_exit_request(ctrl, aen_op);
-- 
GitLab


From 925dd04c1f9825194b9e444c12478084813b2b5d Mon Sep 17 00:00:00 2001
From: David Milburn <dmilburn@redhat.com>
Date: Wed, 2 Sep 2020 17:42:52 -0500
Subject: [PATCH 1130/1341] nvme-rdma: cancel async events before freeing event
 struct

Cancel async event work in case async event has been queued up, and
nvme_rdma_submit_async_event() runs after event has been freed.

Signed-off-by: David Milburn <dmilburn@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/rdma.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 1d8ea5305d60f..3247d4ee46b1a 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -835,6 +835,7 @@ static void nvme_rdma_destroy_admin_queue(struct nvme_rdma_ctrl *ctrl,
 		blk_mq_free_tag_set(ctrl->ctrl.admin_tagset);
 	}
 	if (ctrl->async_event_sqe.data) {
+		cancel_work_sync(&ctrl->ctrl.async_event_work);
 		nvme_rdma_free_qe(ctrl->device->dev, &ctrl->async_event_sqe,
 				sizeof(struct nvme_command), DMA_TO_DEVICE);
 		ctrl->async_event_sqe.data = NULL;
-- 
GitLab


From ceb1e0874dba5cbfc4e0b4145796a4bfb3716e6a Mon Sep 17 00:00:00 2001
From: David Milburn <dmilburn@redhat.com>
Date: Wed, 2 Sep 2020 17:42:53 -0500
Subject: [PATCH 1131/1341] nvme-tcp: cancel async events before freeing event
 struct

Cancel async event work in case async event has been queued up, and
nvme_tcp_submit_async_event() runs after event has been freed.

Signed-off-by: David Milburn <dmilburn@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/tcp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c
index 873d6afcbc9ee..245a73d0a1caf 100644
--- a/drivers/nvme/host/tcp.c
+++ b/drivers/nvme/host/tcp.c
@@ -1597,6 +1597,7 @@ static struct blk_mq_tag_set *nvme_tcp_alloc_tagset(struct nvme_ctrl *nctrl,
 static void nvme_tcp_free_admin_queue(struct nvme_ctrl *ctrl)
 {
 	if (to_tcp_ctrl(ctrl)->async_req.pdu) {
+		cancel_work_sync(&ctrl->async_event_work);
 		nvme_tcp_free_async_req(to_tcp_ctrl(ctrl));
 		to_tcp_ctrl(ctrl)->async_req.pdu = NULL;
 	}
-- 
GitLab


From a566a9012acd7c9a4be7e30dc7acb7a811ec2260 Mon Sep 17 00:00:00 2001
From: Tycho Andersen <tycho@tycho.pizza>
Date: Tue, 1 Sep 2020 19:40:16 -0600
Subject: [PATCH 1132/1341] seccomp: don't leak memory when filter install
 races

In seccomp_set_mode_filter() with TSYNC | NEW_LISTENER, we first initialize
the listener fd, then check to see if we can actually use it later in
seccomp_may_assign_mode(), which can fail if anyone else in our thread
group has installed a filter and caused some divergence. If we can't, we
partially clean up the newly allocated file: we put the fd, put the file,
but don't actually clean up the *memory* that was allocated at
filter->notif. Let's clean that up too.

To accomplish this, let's hoist the actual "detach a notifier from a
filter" code to its own helper out of seccomp_notify_release(), so that in
case anyone adds stuff to init_listener(), they only have to add the
cleanup code in one spot. This does a bit of extra locking and such on the
failure path when the filter is not attached, but it's a slow failure path
anyway.

Fixes: 51891498f2da ("seccomp: allow TSYNC and USER_NOTIF together")
Reported-by: syzbot+3ad9614a12f80994c32e@syzkaller.appspotmail.com
Signed-off-by: Tycho Andersen <tycho@tycho.pizza>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20200902014017.934315-1-tycho@tycho.pizza
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 kernel/seccomp.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 3ee59ce0a323d..bb0dd9ae699a4 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -1109,13 +1109,12 @@ static long seccomp_set_mode_strict(void)
 }
 
 #ifdef CONFIG_SECCOMP_FILTER
-static int seccomp_notify_release(struct inode *inode, struct file *file)
+static void seccomp_notify_detach(struct seccomp_filter *filter)
 {
-	struct seccomp_filter *filter = file->private_data;
 	struct seccomp_knotif *knotif;
 
 	if (!filter)
-		return 0;
+		return;
 
 	mutex_lock(&filter->notify_lock);
 
@@ -1142,6 +1141,13 @@ static int seccomp_notify_release(struct inode *inode, struct file *file)
 	kfree(filter->notif);
 	filter->notif = NULL;
 	mutex_unlock(&filter->notify_lock);
+}
+
+static int seccomp_notify_release(struct inode *inode, struct file *file)
+{
+	struct seccomp_filter *filter = file->private_data;
+
+	seccomp_notify_detach(filter);
 	__put_seccomp_filter(filter);
 	return 0;
 }
@@ -1581,6 +1587,7 @@ static long seccomp_set_mode_filter(unsigned int flags,
 			listener_f->private_data = NULL;
 			fput(listener_f);
 			put_unused_fd(listener);
+			seccomp_notify_detach(prepared);
 		} else {
 			fd_install(listener, listener_f);
 			ret = listener;
-- 
GitLab


From 19d1d49f2a8ce7adb10d93ff31909b0932c0d628 Mon Sep 17 00:00:00 2001
From: Tycho Andersen <tycho@tycho.pizza>
Date: Tue, 1 Sep 2020 19:40:17 -0600
Subject: [PATCH 1133/1341] mailmap, MAINTAINERS: move to tycho.pizza

I've changed my e-mail address to tycho.pizza, so let's reflect that in
these files.

Signed-off-by: Tycho Andersen <tycho@tycho.pizza>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20200902014017.934315-2-tycho@tycho.pizza
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 .mailmap    | 1 +
 MAINTAINERS | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/.mailmap b/.mailmap
index 332c7833057f5..50096b96c85df 100644
--- a/.mailmap
+++ b/.mailmap
@@ -308,6 +308,7 @@ Tony Luck <tony.luck@intel.com>
 TripleX Chung <xxx.phy@gmail.com> <triplex@zh-kernel.org>
 TripleX Chung <xxx.phy@gmail.com> <zhongyu@18mail.cn>
 Tsuneo Yoshioka <Tsuneo.Yoshioka@f-secure.com>
+Tycho Andersen <tycho@tycho.pizza> <tycho@tycho.ws>
 Uwe Kleine-König <ukleinek@informatik.uni-freiburg.de>
 Uwe Kleine-König <ukl@pengutronix.de>
 Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index f0068bceeb615..adc4f0619b19b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9775,7 +9775,7 @@ F:	drivers/scsi/53c700*
 
 LEAKING_ADDRESSES
 M:	Tobin C. Harding <me@tobin.cc>
-M:	Tycho Andersen <tycho@tycho.ws>
+M:	Tycho Andersen <tycho@tycho.pizza>
 L:	kernel-hardening@lists.openwall.com
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/tobin/leaks.git
-- 
GitLab


From e839317900e9f13c83d8711d684de88c625b307a Mon Sep 17 00:00:00 2001
From: Tycho Andersen <tycho@tycho.pizza>
Date: Wed, 2 Sep 2020 08:09:53 -0600
Subject: [PATCH 1134/1341] seccomp: don't leave dangling ->notif if file
 allocation fails

Christian and Kees both pointed out that this is a bit sloppy to open-code
both places, and Christian points out that we leave a dangling pointer to
->notif if file allocation fails. Since we check ->notif for null in order
to determine if it's ok to install a filter, this means people won't be
able to install a filter if the file allocation fails for some reason, even
if they subsequently should be able to.

To fix this, let's hoist this free+null into its own little helper and use
it.

Reported-by: Kees Cook <keescook@chromium.org>
Reported-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Tycho Andersen <tycho@tycho.pizza>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20200902140953.1201956-1-tycho@tycho.pizza
Signed-off-by: Kees Cook <keescook@chromium.org>
---
 kernel/seccomp.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index bb0dd9ae699a4..676d4af621038 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -1109,6 +1109,12 @@ static long seccomp_set_mode_strict(void)
 }
 
 #ifdef CONFIG_SECCOMP_FILTER
+static void seccomp_notify_free(struct seccomp_filter *filter)
+{
+	kfree(filter->notif);
+	filter->notif = NULL;
+}
+
 static void seccomp_notify_detach(struct seccomp_filter *filter)
 {
 	struct seccomp_knotif *knotif;
@@ -1138,8 +1144,7 @@ static void seccomp_notify_detach(struct seccomp_filter *filter)
 		complete(&knotif->ready);
 	}
 
-	kfree(filter->notif);
-	filter->notif = NULL;
+	seccomp_notify_free(filter);
 	mutex_unlock(&filter->notify_lock);
 }
 
@@ -1494,7 +1499,7 @@ static struct file *init_listener(struct seccomp_filter *filter)
 
 out_notif:
 	if (IS_ERR(ret))
-		kfree(filter->notif);
+		seccomp_notify_free(filter);
 out:
 	return ret;
 }
-- 
GitLab


From c4440b8a457779adeec42c5e181cb4016f19ce0f Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Tue, 8 Sep 2020 16:27:29 -0700
Subject: [PATCH 1135/1341] Input: i8042 - add Entroware Proteus EL07R4 to
 nomux and reset lists

The keyboard drops keypresses early during boot unless both the nomux
and reset quirks are set. Add DMI table entries for this.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1806085
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20200907095656.13155-1-hdegoede@redhat.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/serio/i8042-x86ia64io.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h
index 7d7f737027264..37fb9aa88f9c3 100644
--- a/drivers/input/serio/i8042-x86ia64io.h
+++ b/drivers/input/serio/i8042-x86ia64io.h
@@ -548,6 +548,14 @@ static const struct dmi_system_id __initconst i8042_dmi_nomux_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"),
 		},
 	},
+	{
+		/* Entroware Proteus */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Entroware"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Proteus"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "EL07R4"),
+		},
+	},
 	{ }
 };
 
@@ -676,6 +684,14 @@ static const struct dmi_system_id __initconst i8042_dmi_reset_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "33474HU"),
 		},
 	},
+	{
+		/* Entroware Proteus */
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Entroware"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Proteus"),
+			DMI_MATCH(DMI_PRODUCT_VERSION, "EL07R4"),
+		},
+	},
 	{ }
 };
 
-- 
GitLab


From e8a8a185051a460e3eb0617dca33f996f4e31516 Mon Sep 17 00:00:00 2001
From: Omar Sandoval <osandov@fb.com>
Date: Tue, 8 Sep 2020 13:46:37 -0700
Subject: [PATCH 1136/1341] block: only call sched requeue_request() for
 scheduled requests

Yang Yang reported the following crash caused by requeueing a flush
request in Kyber:

  [    2.517297] Unable to handle kernel paging request at virtual address ffffffd8071c0b00
  ...
  [    2.517468] pc : clear_bit+0x18/0x2c
  [    2.517502] lr : sbitmap_queue_clear+0x40/0x228
  [    2.517503] sp : ffffff800832bc60 pstate : 00c00145
  ...
  [    2.517599] Process ksoftirqd/5 (pid: 51, stack limit = 0xffffff8008328000)
  [    2.517602] Call trace:
  [    2.517606]  clear_bit+0x18/0x2c
  [    2.517619]  kyber_finish_request+0x74/0x80
  [    2.517627]  blk_mq_requeue_request+0x3c/0xc0
  [    2.517637]  __scsi_queue_insert+0x11c/0x148
  [    2.517640]  scsi_softirq_done+0x114/0x130
  [    2.517643]  blk_done_softirq+0x7c/0xb0
  [    2.517651]  __do_softirq+0x208/0x3bc
  [    2.517657]  run_ksoftirqd+0x34/0x60
  [    2.517663]  smpboot_thread_fn+0x1c4/0x2c0
  [    2.517667]  kthread+0x110/0x120
  [    2.517669]  ret_from_fork+0x10/0x18

This happens because Kyber doesn't track flush requests, so
kyber_finish_request() reads a garbage domain token. Only call the
scheduler's requeue_request() hook if RQF_ELVPRIV is set (like we do for
the finish_request() hook in blk_mq_free_request()). Now that we're
handling it in blk-mq, also remove the check from BFQ.

Reported-by: Yang Yang <yang.yang@vivo.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/bfq-iosched.c  | 12 ------------
 block/blk-mq-sched.h |  2 +-
 2 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index a4c0bec920cbd..ee767fa000e4f 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -5895,18 +5895,6 @@ static void bfq_finish_requeue_request(struct request *rq)
 	struct bfq_queue *bfqq = RQ_BFQQ(rq);
 	struct bfq_data *bfqd;
 
-	/*
-	 * Requeue and finish hooks are invoked in blk-mq without
-	 * checking whether the involved request is actually still
-	 * referenced in the scheduler. To handle this fact, the
-	 * following two checks make this function exit in case of
-	 * spurious invocations, for which there is nothing to do.
-	 *
-	 * First, check whether rq has nothing to do with an elevator.
-	 */
-	if (unlikely(!(rq->rq_flags & RQF_ELVPRIV)))
-		return;
-
 	/*
 	 * rq either is not associated with any icq, or is an already
 	 * requeued request that has not (yet) been re-inserted into
diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h
index 126021fc3a11f..e81ca1bf6e10b 100644
--- a/block/blk-mq-sched.h
+++ b/block/blk-mq-sched.h
@@ -66,7 +66,7 @@ static inline void blk_mq_sched_requeue_request(struct request *rq)
 	struct request_queue *q = rq->q;
 	struct elevator_queue *e = q->elevator;
 
-	if (e && e->type->ops.requeue_request)
+	if ((rq->rq_flags & RQF_ELVPRIV) && e && e->type->ops.requeue_request)
 		e->type->ops.requeue_request(rq);
 }
 
-- 
GitLab


From 123aaf774f70ba48fb9ab064b6ce75a9b64d7b85 Mon Sep 17 00:00:00 2001
From: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Date: Wed, 19 Aug 2020 10:34:48 +0900
Subject: [PATCH 1137/1341] f2fs: Fix type of section block count variables

Commit da52f8ade40b ("f2fs: get the right gc victim section when section
has several segments") added code to count blocks of each section using
variables with type 'unsigned short', which has 2 bytes size in many
systems. However, the counts can be larger than the 2 bytes range and
type conversion results in wrong values. Especially when the f2fs
sections have blocks as many as USHRT_MAX + 1, the count is handled as 0.
This triggers eternal loop in init_dirty_segmap() at mount system call.
Fix this by changing the type of the variables to block_t.

Fixes: da52f8ade40b ("f2fs: get the right gc victim section when section has several segments")
Signed-off-by: Shin'ichiro Kawasaki <shinichiro.kawasaki@wdc.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/segment.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index a65d357f89a9f..e247a5ef3713f 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -799,7 +799,7 @@ static void __locate_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
 
 		if (__is_large_section(sbi)) {
 			unsigned int secno = GET_SEC_FROM_SEG(sbi, segno);
-			unsigned short valid_blocks =
+			block_t valid_blocks =
 				get_valid_blocks(sbi, segno, true);
 
 			f2fs_bug_on(sbi, unlikely(!valid_blocks ||
@@ -815,7 +815,7 @@ static void __remove_dirty_segment(struct f2fs_sb_info *sbi, unsigned int segno,
 		enum dirty_type dirty_type)
 {
 	struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
-	unsigned short valid_blocks;
+	block_t valid_blocks;
 
 	if (test_and_clear_bit(segno, dirty_i->dirty_segmap[dirty_type]))
 		dirty_i->nr_dirty[dirty_type]--;
@@ -4316,8 +4316,8 @@ static void init_dirty_segmap(struct f2fs_sb_info *sbi)
 	struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
 	struct free_segmap_info *free_i = FREE_I(sbi);
 	unsigned int segno = 0, offset = 0, secno;
-	unsigned short valid_blocks;
-	unsigned short blks_per_sec = BLKS_PER_SEC(sbi);
+	block_t valid_blocks;
+	block_t blks_per_sec = BLKS_PER_SEC(sbi);
 
 	while (1) {
 		/* find dirty segment based on free segmap */
-- 
GitLab


From e2cab031ba7b5003cd12185b3ef38f1a75e3dae8 Mon Sep 17 00:00:00 2001
From: Sahitya Tummala <stummala@codeaurora.org>
Date: Tue, 18 Aug 2020 15:40:14 +0530
Subject: [PATCH 1138/1341] f2fs: fix indefinite loop scanning for free nid

If the sbi->ckpt->next_free_nid is not NAT block aligned and if there
are free nids in that NAT block between the start of the block and
next_free_nid, then those free nids will not be scanned in scan_nat_page().
This results into mismatch between nm_i->available_nids and the sum of
nm_i->free_nid_count of all NAT blocks scanned. And nm_i->available_nids
will always be greater than the sum of free nids in all the blocks.
Under this condition, if we use all the currently scanned free nids,
then it will loop forever in f2fs_alloc_nid() as nm_i->available_nids
is still not zero but nm_i->free_nid_count of that partially scanned
NAT block is zero.

Fix this to align the nm_i->next_scan_nid to the first nid of the
corresponding NAT block.

Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/node.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 3ad7bdbda5ca1..cb1b5b61a1dab 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -2373,6 +2373,9 @@ static int __f2fs_build_free_nids(struct f2fs_sb_info *sbi,
 	if (unlikely(nid >= nm_i->max_nid))
 		nid = 0;
 
+	if (unlikely(nid % NAT_ENTRY_PER_BLOCK))
+		nid = NAT_BLOCK_OFFSET(nid) * NAT_ENTRY_PER_BLOCK;
+
 	/* Enough entries */
 	if (nm_i->nid_cnt[FREE_NID] >= NAT_ENTRY_PER_BLOCK)
 		return 0;
-- 
GitLab


From 20d0a107fb35f37578b919f62bd474d6d358d579 Mon Sep 17 00:00:00 2001
From: Gabriel Krisman Bertazi <krisman@collabora.com>
Date: Wed, 19 Aug 2020 16:07:31 -0400
Subject: [PATCH 1139/1341] f2fs: Return EOF on unaligned end of file DIO read

Reading past end of file returns EOF for aligned reads but -EINVAL for
unaligned reads on f2fs.  While documentation is not strict about this
corner case, most filesystem returns EOF on this case, like iomap
filesystems.  This patch consolidates the behavior for f2fs, by making
it return EOF(0).

it can be verified by a read loop on a file that does a partial read
before EOF (A file that doesn't end at an aligned address).  The
following code fails on an unaligned file on f2fs, but not on
btrfs, ext4, and xfs.

  while (done < total) {
    ssize_t delta = pread(fd, buf + done, total - done, off + done);
    if (!delta)
      break;
    ...
  }

It is arguable whether filesystems should actually return EOF or
-EINVAL, but since iomap filesystems support it, and so does the
original DIO code, it seems reasonable to consolidate on that.

Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
 fs/f2fs/data.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index ed2bca0fce922..73683e58a08d5 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -3550,6 +3550,9 @@ static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
 	unsigned long align = offset | iov_iter_alignment(iter);
 	struct block_device *bdev = inode->i_sb->s_bdev;
 
+	if (iov_iter_rw(iter) == READ && offset >= i_size_read(inode))
+		return 1;
+
 	if (align & blocksize_mask) {
 		if (bdev)
 			blkbits = blksize_bits(bdev_logical_block_size(bdev));
-- 
GitLab


From 0460534b532e5518c657c7d6492b9337d975eaa3 Mon Sep 17 00:00:00 2001
From: Vaibhav Jain <vaibhav@linux.ibm.com>
Date: Mon, 7 Sep 2020 16:35:40 +0530
Subject: [PATCH 1140/1341] powerpc/papr_scm: Limit the readability of
 'perf_stats' sysfs attribute

The newly introduced 'perf_stats' attribute uses the default access
mode of 0444, allowing non-root users to access performance stats of
an nvdimm and potentially force the kernel into issuing a large number
of expensive hypercalls. Since the information exposed by this
attribute cannot be cached it is better to ward off access to this
attribute from users who don't need to access to these performance
statistics.

Hence update the access mode of 'perf_stats' attribute to be only
readable by root users.

Fixes: 2d02bf835e57 ("powerpc/papr_scm: Fetch nvdimm performance stats from PHYP")
Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200907110540.21349-1-vaibhav@linux.ibm.com
---
 arch/powerpc/platforms/pseries/papr_scm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c
index f439f0dfea7d1..a88a707a608aa 100644
--- a/arch/powerpc/platforms/pseries/papr_scm.c
+++ b/arch/powerpc/platforms/pseries/papr_scm.c
@@ -822,7 +822,7 @@ static ssize_t perf_stats_show(struct device *dev,
 	kfree(stats);
 	return rc ? rc : seq_buf_used(&s);
 }
-DEVICE_ATTR_RO(perf_stats);
+DEVICE_ATTR_ADMIN_RO(perf_stats);
 
 static ssize_t flags_show(struct device *dev,
 			  struct device_attribute *attr, char *buf)
-- 
GitLab


From 73a5379937ec89b91e907bb315e2434ee9696a2c Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Tue, 8 Sep 2020 12:56:08 -0700
Subject: [PATCH 1141/1341] nvme-fabrics: allow to queue requests for live
 queues

Right now we are failing requests based on the controller state (which
is checked inline in nvmf_check_ready) however we should definitely
accept requests if the queue is live.

When entering controller reset, we transition the controller into
NVME_CTRL_RESETTING, and then return BLK_STS_RESOURCE for non-mpath
requests (have blk_noretry_request set).

This is also the case for NVME_REQ_USER for the wrong reason. There
shouldn't be any reason for us to reject this I/O in a controller reset.
We do want to prevent passthru commands on the admin queue because we
need the controller to fully initialize first before we let user passthru
admin commands to be issued.

In a non-mpath setup, this means that the requests will simply be
requeued over and over forever not allowing the q_usage_counter to drop
its final reference, causing controller reset to hang if running
concurrently with heavy I/O.

Fixes: 35897b920c8a ("nvme-fabrics: fix and refine state checks in __nvmf_check_ready")
Reviewed-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/fabrics.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c
index 32f61fc5f4c57..8575724734e02 100644
--- a/drivers/nvme/host/fabrics.c
+++ b/drivers/nvme/host/fabrics.c
@@ -565,10 +565,14 @@ bool __nvmf_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
 	struct nvme_request *req = nvme_req(rq);
 
 	/*
-	 * If we are in some state of setup or teardown only allow
-	 * internally generated commands.
+	 * currently we have a problem sending passthru commands
+	 * on the admin_q if the controller is not LIVE because we can't
+	 * make sure that they are going out after the admin connect,
+	 * controller enable and/or other commands in the initialization
+	 * sequence. until the controller will be LIVE, fail with
+	 * BLK_STS_RESOURCE so that they will be rescheduled.
 	 */
-	if (!blk_rq_is_passthrough(rq) || (req->flags & NVME_REQ_USERCMD))
+	if (rq->q == ctrl->admin_q && (req->flags & NVME_REQ_USERCMD))
 		return false;
 
 	/*
@@ -577,7 +581,7 @@ bool __nvmf_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
 	 */
 	switch (ctrl->state) {
 	case NVME_CTRL_CONNECTING:
-		if (nvme_is_fabrics(req->cmd) &&
+		if (blk_rq_is_passthrough(rq) && nvme_is_fabrics(req->cmd) &&
 		    req->cmd->fabrics.fctype == nvme_fabrics_type_connect)
 			return true;
 		break;
-- 
GitLab


From 76366050eb1b3151c4b4110c76538ff14dffb74c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20D=C3=ADaz?= <daniel.diaz@linaro.org>
Date: Wed, 19 Aug 2020 12:32:24 -0500
Subject: [PATCH 1142/1341] x86/defconfigs: Explicitly unset CONFIG_64BIT in
 i386_defconfig
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

A recent refresh of the defconfigs got rid of the following
(unset) config:

  # CONFIG_64BIT is not set

Innocuous as it seems, when the config file is saved again the
behavior is changed so that CONFIG_64BIT=y.

Currently,

  $ make i386_defconfig
  $ grep CONFIG_64BIT .config
  CONFIG_64BIT=y

whereas previously (and with this patch):

  $ make i386_defconfig
  $ grep CONFIG_64BIT .config
  # CONFIG_64BIT is not set

( This was found with weird compiler errors on OpenEmbedded
  builds, as the compiler was unable to cope with 64-bits data
  types. )

Fixes: 1d0e12fd3a84 ("x86/defconfigs: Refresh defconfig files")
Reported-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Daniel Díaz <daniel.diaz@linaro.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
 arch/x86/configs/i386_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
index d7577fece9eba..4cfdf5755ab5d 100644
--- a/arch/x86/configs/i386_defconfig
+++ b/arch/x86/configs/i386_defconfig
@@ -19,6 +19,7 @@ CONFIG_CGROUP_CPUACCT=y
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_COMPAT_BRK is not set
 CONFIG_PROFILING=y
+# CONFIG_64BIT is not set
 CONFIG_SMP=y
 CONFIG_X86_GENERIC=y
 CONFIG_HPET_TIMER=y
-- 
GitLab


From 0a355aeb24081e4538d4d424cd189f16c0bbd983 Mon Sep 17 00:00:00 2001
From: Evan Nimmo <evan.nimmo@alliedtelesis.co.nz>
Date: Wed, 9 Sep 2020 08:32:47 +1200
Subject: [PATCH 1143/1341] i2c: algo: pca: Reapply i2c bus settings after
 reset

If something goes wrong (such as the SCL being stuck low) then we need
to reset the PCA chip. The issue with this is that on reset we lose all
config settings and the chip ends up in a disabled state which results
in a lock up/high CPU usage. We need to re-apply any configuration that
had previously been set and re-enable the chip.

Signed-off-by: Evan Nimmo <evan.nimmo@alliedtelesis.co.nz>
Reviewed-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/algos/i2c-algo-pca.c | 35 +++++++++++++++++++++-----------
 include/linux/i2c-algo-pca.h     | 15 ++++++++++++++
 2 files changed, 38 insertions(+), 12 deletions(-)

diff --git a/drivers/i2c/algos/i2c-algo-pca.c b/drivers/i2c/algos/i2c-algo-pca.c
index 710fbef9a9c20..384af88e58ada 100644
--- a/drivers/i2c/algos/i2c-algo-pca.c
+++ b/drivers/i2c/algos/i2c-algo-pca.c
@@ -41,8 +41,22 @@ static void pca_reset(struct i2c_algo_pca_data *adap)
 		pca_outw(adap, I2C_PCA_INDPTR, I2C_PCA_IPRESET);
 		pca_outw(adap, I2C_PCA_IND, 0xA5);
 		pca_outw(adap, I2C_PCA_IND, 0x5A);
+
+		/*
+		 * After a reset we need to re-apply any configuration
+		 * (calculated in pca_init) to get the bus in a working state.
+		 */
+		pca_outw(adap, I2C_PCA_INDPTR, I2C_PCA_IMODE);
+		pca_outw(adap, I2C_PCA_IND, adap->bus_settings.mode);
+		pca_outw(adap, I2C_PCA_INDPTR, I2C_PCA_ISCLL);
+		pca_outw(adap, I2C_PCA_IND, adap->bus_settings.tlow);
+		pca_outw(adap, I2C_PCA_INDPTR, I2C_PCA_ISCLH);
+		pca_outw(adap, I2C_PCA_IND, adap->bus_settings.thi);
+
+		pca_set_con(adap, I2C_PCA_CON_ENSIO);
 	} else {
 		adap->reset_chip(adap->data);
+		pca_set_con(adap, I2C_PCA_CON_ENSIO | adap->bus_settings.clock_freq);
 	}
 }
 
@@ -423,13 +437,14 @@ static int pca_init(struct i2c_adapter *adap)
 				" Use the nominal frequency.\n", adap->name);
 		}
 
-		pca_reset(pca_data);
-
 		clock = pca_clock(pca_data);
 		printk(KERN_INFO "%s: Clock frequency is %dkHz\n",
 		     adap->name, freqs[clock]);
 
-		pca_set_con(pca_data, I2C_PCA_CON_ENSIO | clock);
+		/* Store settings as these will be needed when the PCA chip is reset */
+		pca_data->bus_settings.clock_freq = clock;
+
+		pca_reset(pca_data);
 	} else {
 		int clock;
 		int mode;
@@ -496,19 +511,15 @@ static int pca_init(struct i2c_adapter *adap)
 			thi = tlow * min_thi / min_tlow;
 		}
 
+		/* Store settings as these will be needed when the PCA chip is reset */
+		pca_data->bus_settings.mode = mode;
+		pca_data->bus_settings.tlow = tlow;
+		pca_data->bus_settings.thi = thi;
+
 		pca_reset(pca_data);
 
 		printk(KERN_INFO
 		     "%s: Clock frequency is %dHz\n", adap->name, clock * 100);
-
-		pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_IMODE);
-		pca_outw(pca_data, I2C_PCA_IND, mode);
-		pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_ISCLL);
-		pca_outw(pca_data, I2C_PCA_IND, tlow);
-		pca_outw(pca_data, I2C_PCA_INDPTR, I2C_PCA_ISCLH);
-		pca_outw(pca_data, I2C_PCA_IND, thi);
-
-		pca_set_con(pca_data, I2C_PCA_CON_ENSIO);
 	}
 	udelay(500); /* 500 us for oscillator to stabilise */
 
diff --git a/include/linux/i2c-algo-pca.h b/include/linux/i2c-algo-pca.h
index d03071732db4a..7c522fdd9ea73 100644
--- a/include/linux/i2c-algo-pca.h
+++ b/include/linux/i2c-algo-pca.h
@@ -53,6 +53,20 @@
 #define I2C_PCA_CON_SI		0x08 /* Serial Interrupt */
 #define I2C_PCA_CON_CR		0x07 /* Clock Rate (MASK) */
 
+/**
+ * struct pca_i2c_bus_settings - The configured PCA i2c bus settings
+ * @mode: Configured i2c bus mode
+ * @tlow: Configured SCL LOW period
+ * @thi: Configured SCL HIGH period
+ * @clock_freq: The configured clock frequency
+ */
+struct pca_i2c_bus_settings {
+	int mode;
+	int tlow;
+	int thi;
+	int clock_freq;
+};
+
 struct i2c_algo_pca_data {
 	void 				*data;	/* private low level data */
 	void (*write_byte)		(void *data, int reg, int val);
@@ -64,6 +78,7 @@ struct i2c_algo_pca_data {
 	 * For PCA9665, use the frequency you want here. */
 	unsigned int			i2c_clock;
 	unsigned int			chip;
+	struct pca_i2c_bus_settings		bus_settings;
 };
 
 int i2c_pca_add_bus(struct i2c_adapter *);
-- 
GitLab


From fc19d559b0d31b5b831fd468b10d7dadafc0d0ec Mon Sep 17 00:00:00 2001
From: Hui Wang <hui.wang@canonical.com>
Date: Wed, 9 Sep 2020 10:00:41 +0800
Subject: [PATCH 1144/1341] ALSA: hda/realtek - The Mic on a RedmiBook doesn't
 work

The Mic connects to the Nid 0x19, but the configuration of Nid 0x19
is not defined to Mic, and also need to set the coeff to enable the
auto detection on the Nid 0x19. After this change, the Mic plugging
in or plugging out could be detected and could record the sound from
the Mic.

And the coeff value is suggested by Kailang of Realtek.

Cc: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20200909020041.8967-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/pci/hda/patch_realtek.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/sound/pci/hda/patch_realtek.c b/sound/pci/hda/patch_realtek.c
index abfc602c3b923..85e207173f5d4 100644
--- a/sound/pci/hda/patch_realtek.c
+++ b/sound/pci/hda/patch_realtek.c
@@ -6228,6 +6228,7 @@ enum {
 	ALC269_FIXUP_LEMOTE_A1802,
 	ALC269_FIXUP_LEMOTE_A190X,
 	ALC256_FIXUP_INTEL_NUC8_RUGGED,
+	ALC255_FIXUP_XIAOMI_HEADSET_MIC,
 };
 
 static const struct hda_fixup alc269_fixups[] = {
@@ -7591,6 +7592,16 @@ static const struct hda_fixup alc269_fixups[] = {
 		.chained = true,
 		.chain_id = ALC269_FIXUP_HEADSET_MODE
 	},
+	[ALC255_FIXUP_XIAOMI_HEADSET_MIC] = {
+		.type = HDA_FIXUP_VERBS,
+		.v.verbs = (const struct hda_verb[]) {
+			{ 0x20, AC_VERB_SET_COEF_INDEX, 0x45 },
+			{ 0x20, AC_VERB_SET_PROC_COEF, 0x5089 },
+			{ }
+		},
+		.chained = true,
+		.chain_id = ALC289_FIXUP_ASUS_GA401
+	},
 };
 
 static const struct snd_pci_quirk alc269_fixup_tbl[] = {
@@ -7888,6 +7899,7 @@ static const struct snd_pci_quirk alc269_fixup_tbl[] = {
 	SND_PCI_QUIRK(0x1b35, 0x1236, "CZC TMI", ALC269_FIXUP_CZC_TMI),
 	SND_PCI_QUIRK(0x1b35, 0x1237, "CZC L101", ALC269_FIXUP_CZC_L101),
 	SND_PCI_QUIRK(0x1b7d, 0xa831, "Ordissimo EVE2 ", ALC269VB_FIXUP_ORDISSIMO_EVE2), /* Also known as Malata PC-B1303 */
+	SND_PCI_QUIRK(0x1d72, 0x1602, "RedmiBook", ALC255_FIXUP_XIAOMI_HEADSET_MIC),
 	SND_PCI_QUIRK(0x1d72, 0x1901, "RedmiBook 14", ALC256_FIXUP_ASUS_HEADSET_MIC),
 	SND_PCI_QUIRK(0x10ec, 0x118c, "Medion EE4254 MD62100", ALC256_FIXUP_MEDION_HEADSET_NO_PRESENCE),
 	SND_PCI_QUIRK(0x1c06, 0x2013, "Lemote A1802", ALC269_FIXUP_LEMOTE_A1802),
@@ -8065,6 +8077,7 @@ static const struct hda_model_fixup alc269_fixup_models[] = {
 	{.id = ALC298_FIXUP_HUAWEI_MBX_STEREO, .name = "huawei-mbx-stereo"},
 	{.id = ALC256_FIXUP_MEDION_HEADSET_NO_PRESENCE, .name = "alc256-medion-headset"},
 	{.id = ALC298_FIXUP_SAMSUNG_HEADPHONE_VERY_QUIET, .name = "alc298-samsung-headphone"},
+	{.id = ALC255_FIXUP_XIAOMI_HEADSET_MIC, .name = "alc255-xiaomi-headset"},
 	{}
 };
 #define ALC225_STANDARD_PINS \
-- 
GitLab


From f022ff7bf377ca94367be05de61277934d42ea74 Mon Sep 17 00:00:00 2001
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Date: Mon, 7 Sep 2020 12:20:36 +0300
Subject: [PATCH 1145/1341] thunderbolt: Retry DROM read once if parsing fails

Kai-Heng reported that sometimes DROM parsing of ASUS PA27AC Thunderbolt 3
monitor fails. This makes the driver to fail to add the device so only
DisplayPort tunneling is functional.

It is not clear what exactly happens but waiting for 100 ms and retrying
the read seems to work this around so we do that here.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=206493
Reported-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Tested-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Cc: stable@vger.kernel.org
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
---
 drivers/thunderbolt/eeprom.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/drivers/thunderbolt/eeprom.c b/drivers/thunderbolt/eeprom.c
index 3ebca44ab3faa..0c8471be3e32f 100644
--- a/drivers/thunderbolt/eeprom.c
+++ b/drivers/thunderbolt/eeprom.c
@@ -7,6 +7,7 @@
  */
 
 #include <linux/crc32.h>
+#include <linux/delay.h>
 #include <linux/property.h>
 #include <linux/slab.h>
 #include "tb.h"
@@ -389,8 +390,8 @@ static int tb_drom_parse_entries(struct tb_switch *sw)
 		struct tb_drom_entry_header *entry = (void *) (sw->drom + pos);
 		if (pos + 1 == drom_size || pos + entry->len > drom_size
 				|| !entry->len) {
-			tb_sw_warn(sw, "drom buffer overrun, aborting\n");
-			return -EIO;
+			tb_sw_warn(sw, "DROM buffer overrun\n");
+			return -EILSEQ;
 		}
 
 		switch (entry->type) {
@@ -526,7 +527,8 @@ int tb_drom_read(struct tb_switch *sw)
 	u16 size;
 	u32 crc;
 	struct tb_drom_header *header;
-	int res;
+	int res, retries = 1;
+
 	if (sw->drom)
 		return 0;
 
@@ -612,7 +614,17 @@ int tb_drom_read(struct tb_switch *sw)
 		tb_sw_warn(sw, "drom device_rom_revision %#x unknown\n",
 			header->device_rom_revision);
 
-	return tb_drom_parse_entries(sw);
+	res = tb_drom_parse_entries(sw);
+	/* If the DROM parsing fails, wait a moment and retry once */
+	if (res == -EILSEQ && retries--) {
+		tb_sw_warn(sw, "parsing DROM failed, retrying\n");
+		msleep(100);
+		res = tb_drom_read_n(sw, 0, sw->drom, size);
+		if (!res)
+			goto parse;
+	}
+
+	return res;
 err:
 	kfree(sw->drom);
 	sw->drom = NULL;
-- 
GitLab


From 19873eec7e13fda140a0ebc75d6664e57c00bfb1 Mon Sep 17 00:00:00 2001
From: Dexuan Cui <decui@microsoft.com>
Date: Fri, 4 Sep 2020 19:55:55 -0700
Subject: [PATCH 1146/1341] Drivers: hv: vmbus: hibernation: do not hang
 forever in vmbus_bus_resume()

After we Stop and later Start a VM that uses Accelerated Networking (NIC
SR-IOV), currently the VF vmbus device's Instance GUID can change, so after
vmbus_bus_resume() -> vmbus_request_offers(), vmbus_onoffer() can not find
the original vmbus channel of the VF, and hence we can't complete()
vmbus_connection.ready_for_resume_event in check_ready_for_resume_event(),
and the VM hangs in vmbus_bus_resume() forever.

Fix the issue by adding a timeout, so the resuming can still succeed, and
the saved state is not lost, and according to my test, the user can disable
Accelerated Networking and then will be able to SSH into the VM for
further recovery. Also prevent the VM in question from suspending again.

The host will be fixed so in future the Instance GUID will stay the same
across hibernation.

Fixes: d8bd2d442bb2 ("Drivers: hv: vmbus: Resume after fixing up old primary channels")
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20200905025555.45614-1-decui@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
---
 drivers/hv/vmbus_drv.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
index 45c954d75e701..0f2d6a60f769e 100644
--- a/drivers/hv/vmbus_drv.c
+++ b/drivers/hv/vmbus_drv.c
@@ -2387,7 +2387,10 @@ static int vmbus_bus_suspend(struct device *dev)
 	if (atomic_read(&vmbus_connection.nr_chan_close_on_suspend) > 0)
 		wait_for_completion(&vmbus_connection.ready_for_suspend_event);
 
-	WARN_ON(atomic_read(&vmbus_connection.nr_chan_fixup_on_resume) != 0);
+	if (atomic_read(&vmbus_connection.nr_chan_fixup_on_resume) != 0) {
+		pr_err("Can not suspend due to a previous failed resuming\n");
+		return -EBUSY;
+	}
 
 	mutex_lock(&vmbus_connection.channel_mutex);
 
@@ -2463,7 +2466,9 @@ static int vmbus_bus_resume(struct device *dev)
 
 	vmbus_request_offers();
 
-	wait_for_completion(&vmbus_connection.ready_for_resume_event);
+	if (wait_for_completion_timeout(
+		&vmbus_connection.ready_for_resume_event, 10 * HZ) == 0)
+		pr_err("Some vmbus device is missing after suspending?\n");
 
 	/* Reset the event for the next suspend. */
 	reinit_completion(&vmbus_connection.ready_for_suspend_event);
-- 
GitLab


From b59a7ca15464c78ea1ba3b280cfc5ac5ece11ade Mon Sep 17 00:00:00 2001
From: Gustav Wiklander <gustavwi@axis.com>
Date: Tue, 8 Sep 2020 17:11:29 +0200
Subject: [PATCH 1147/1341] spi: Fix memory leak on splited transfers

In the prepare_message callback the bus driver has the
opportunity to split a transfer into smaller chunks.
spi_map_msg is done after prepare_message.

Function spi_res_release releases the splited transfers
in the message. Therefore spi_res_release should be called
after spi_map_msg.

The previous try at this was commit c9ba7a16d0f1
which released the splited transfers after
spi_finalize_current_message had been called.
This introduced a race since the message struct could be
out of scope because the spi_sync call got completed.

Fixes this leak on spi bus driver spi-bcm2835.c when transfer
size is greater than 65532:

Kmemleak:
sg_alloc_table+0x28/0xc8
spi_map_buf+0xa4/0x300
__spi_pump_messages+0x370/0x748
__spi_sync+0x1d4/0x270
spi_sync+0x34/0x58
spi_test_execute_msg+0x60/0x340 [spi_loopback_test]
spi_test_run_iter+0x548/0x578 [spi_loopback_test]
spi_test_run_test+0x94/0x140 [spi_loopback_test]
spi_test_run_tests+0x150/0x180 [spi_loopback_test]
spi_loopback_test_probe+0x50/0xd0 [spi_loopback_test]
spi_drv_probe+0x84/0xe0

Signed-off-by: Gustav Wiklander <gustavwi@axis.com>
Link: https://lore.kernel.org/r/20200908151129.15915-1-gustav.wiklander@axis.com
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 92b8fb416dca0..832926b27c920 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -1327,8 +1327,6 @@ static int spi_transfer_one_message(struct spi_controller *ctlr,
 	if (msg->status && ctlr->handle_err)
 		ctlr->handle_err(ctlr, msg);
 
-	spi_res_release(ctlr, msg);
-
 	spi_finalize_current_message(ctlr);
 
 	return ret;
@@ -1727,6 +1725,13 @@ void spi_finalize_current_message(struct spi_controller *ctlr)
 
 	spi_unmap_msg(ctlr, mesg);
 
+	/* In the prepare_messages callback the spi bus has the opportunity to
+	 * split a transfer to smaller chunks.
+	 * Release splited transfers here since spi_map_msg is done on the
+	 * splited transfers.
+	 */
+	spi_res_release(ctlr, mesg);
+
 	if (ctlr->cur_msg_prepared && ctlr->unprepare_message) {
 		ret = ctlr->unprepare_message(ctlr, mesg);
 		if (ret) {
-- 
GitLab


From c170a5a3b6944ad8e76547c4a1d9fe81c8f23ac8 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 9 Sep 2020 12:43:04 +0300
Subject: [PATCH 1148/1341] spi: stm32: fix pm_runtime_get_sync() error
 checking

The pm_runtime_get_sync() can return either 0 or 1 on success but this
code treats 1 as a failure.

Fixes: db96bf976a4f ("spi: stm32: fixes suspend/resume management")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Alain Volmat <alain.volmat@st.com>
Link: https://lore.kernel.org/r/20200909094304.GA420136@mwanda
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 drivers/spi/spi-stm32.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c
index a00f6b51ccbfc..3056428b09f31 100644
--- a/drivers/spi/spi-stm32.c
+++ b/drivers/spi/spi-stm32.c
@@ -2064,7 +2064,7 @@ static int stm32_spi_resume(struct device *dev)
 	}
 
 	ret = pm_runtime_get_sync(dev);
-	if (ret) {
+	if (ret < 0) {
 		dev_err(dev, "Unable to power device:%d\n", ret);
 		return ret;
 	}
-- 
GitLab


From 2cd896a5e86fc326bda8614b96c0401dcc145868 Mon Sep 17 00:00:00 2001
From: Ritesh Harjani <riteshh@linux.ibm.com>
Date: Wed, 9 Sep 2020 08:44:25 +0530
Subject: [PATCH 1149/1341] block: Set same_page to false in
 __bio_try_merge_page if ret is false

If we hit the UINT_MAX limit of bio->bi_iter.bi_size and so we are anyway
not merging this page in this bio, then it make sense to make same_page
also as false before returning.

Without this patch, we hit below WARNING in iomap.
This mostly happens with very large memory system and / or after tweaking
vm dirty threshold params to delay writeback of dirty data.

WARNING: CPU: 18 PID: 5130 at fs/iomap/buffered-io.c:74 iomap_page_release+0x120/0x150
 CPU: 18 PID: 5130 Comm: fio Kdump: loaded Tainted: G        W         5.8.0-rc3 #6
 Call Trace:
  __remove_mapping+0x154/0x320 (unreliable)
  iomap_releasepage+0x80/0x180
  try_to_release_page+0x94/0xe0
  invalidate_inode_page+0xc8/0x110
  invalidate_mapping_pages+0x1dc/0x540
  generic_fadvise+0x3c8/0x450
  xfs_file_fadvise+0x2c/0xe0 [xfs]
  vfs_fadvise+0x3c/0x60
  ksys_fadvise64_64+0x68/0xe0
  sys_fadvise64+0x28/0x40
  system_call_exception+0xf8/0x1c0
  system_call_common+0xf0/0x278

Fixes: cc90bc68422 ("block: fix "check bi_size overflow before merge"")
Reported-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/bio.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/block/bio.c b/block/bio.c
index a9931f23d9332..e865ea55b9f9a 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -879,8 +879,10 @@ bool __bio_try_merge_page(struct bio *bio, struct page *page,
 		struct bio_vec *bv = &bio->bi_io_vec[bio->bi_vcnt - 1];
 
 		if (page_is_mergeable(bv, page, len, off, same_page)) {
-			if (bio->bi_iter.bi_size > UINT_MAX - len)
+			if (bio->bi_iter.bi_size > UINT_MAX - len) {
+				*same_page = false;
 				return false;
+			}
 			bv->bv_len += len;
 			bio->bi_iter.bi_size += len;
 			return true;
-- 
GitLab


From 9e712446a80bba9ede824ff00f2af630ed9ac0be Mon Sep 17 00:00:00 2001
From: YueHaibing <yuehaibing@huawei.com>
Date: Sat, 5 Sep 2020 20:16:24 +0800
Subject: [PATCH 1150/1341] RDMA/bnxt_re: Remove set but not used variable
 'qplib_ctx'
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

drivers/infiniband/hw/bnxt_re/main.c:1012:25:
 warning: variable ‘qplib_ctx’ set but not used [-Wunused-but-set-variable]

Fixes: f86b31c6a28f ("RDMA/bnxt_re: Static NQ depth allocation")
Link: https://lore.kernel.org/r/20200905121624.32776-1-yuehaibing@huawei.com
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/hw/bnxt_re/main.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c
index 13bbeb42794f9..53aee5a42ab85 100644
--- a/drivers/infiniband/hw/bnxt_re/main.c
+++ b/drivers/infiniband/hw/bnxt_re/main.c
@@ -1009,7 +1009,6 @@ static void bnxt_re_free_res(struct bnxt_re_dev *rdev)
 static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
 {
 	struct bnxt_re_ring_attr rattr = {};
-	struct bnxt_qplib_ctx *qplib_ctx;
 	int num_vec_created = 0;
 	int rc = 0, i;
 	u8 type;
@@ -1032,7 +1031,6 @@ static int bnxt_re_alloc_res(struct bnxt_re_dev *rdev)
 	if (rc)
 		goto dealloc_res;
 
-	qplib_ctx = &rdev->qplib_ctx;
 	for (i = 0; i < rdev->num_msix - 1; i++) {
 		struct bnxt_qplib_nq *nq;
 
-- 
GitLab


From 39c2d639ca183a400ba3259fa0825714cbb09c53 Mon Sep 17 00:00:00 2001
From: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Date: Mon, 7 Sep 2020 15:52:16 +0530
Subject: [PATCH 1151/1341] RDMA/rtrs-srv: Set .release function for rtrs srv
 device during device init

The device .release function was not being set during the device
initialization. This was leading to the below warning, in error cases when
put_srv was called before device_add was called.

Warning:

Device '(null)' does not have a release() function, it is broken and must
be fixed. See Documentation/kobject.txt.

So, set the device .release function during device initialization in the
__alloc_srv() function.

Fixes: baa5b28b7a47 ("RDMA/rtrs-srv: Replace device_register with device_initialize and device_add")
Link: https://lore.kernel.org/r/20200907102216.104041-1-haris.iqbal@cloud.ionos.com
Signed-off-by: Md Haris Iqbal <haris.iqbal@cloud.ionos.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c | 8 --------
 drivers/infiniband/ulp/rtrs/rtrs-srv.c       | 8 ++++++++
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
index 2f981ae970767..cf6a2be61695d 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv-sysfs.c
@@ -152,13 +152,6 @@ static struct attribute_group rtrs_srv_stats_attr_group = {
 	.attrs = rtrs_srv_stats_attrs,
 };
 
-static void rtrs_srv_dev_release(struct device *dev)
-{
-	struct rtrs_srv *srv = container_of(dev, struct rtrs_srv, dev);
-
-	kfree(srv);
-}
-
 static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
 {
 	struct rtrs_srv *srv = sess->srv;
@@ -172,7 +165,6 @@ static int rtrs_srv_create_once_sysfs_root_folders(struct rtrs_srv_sess *sess)
 		goto unlock;
 	}
 	srv->dev.class = rtrs_dev_class;
-	srv->dev.release = rtrs_srv_dev_release;
 	err = dev_set_name(&srv->dev, "%s", sess->s.sessname);
 	if (err)
 		goto unlock;
diff --git a/drivers/infiniband/ulp/rtrs/rtrs-srv.c b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
index b61a18e57aeba..28f6414dfa3dc 100644
--- a/drivers/infiniband/ulp/rtrs/rtrs-srv.c
+++ b/drivers/infiniband/ulp/rtrs/rtrs-srv.c
@@ -1319,6 +1319,13 @@ static int rtrs_srv_get_next_cq_vector(struct rtrs_srv_sess *sess)
 	return sess->cur_cq_vector;
 }
 
+static void rtrs_srv_dev_release(struct device *dev)
+{
+	struct rtrs_srv *srv = container_of(dev, struct rtrs_srv, dev);
+
+	kfree(srv);
+}
+
 static struct rtrs_srv *__alloc_srv(struct rtrs_srv_ctx *ctx,
 				     const uuid_t *paths_uuid)
 {
@@ -1337,6 +1344,7 @@ static struct rtrs_srv *__alloc_srv(struct rtrs_srv_ctx *ctx,
 	srv->queue_depth = sess_queue_depth;
 	srv->ctx = ctx;
 	device_initialize(&srv->dev);
+	srv->dev.release = rtrs_srv_dev_release;
 
 	srv->chunks = kcalloc(srv->queue_depth, sizeof(*srv->chunks),
 			      GFP_KERNEL);
-- 
GitLab


From 0b089c1ef7047652b13b4cdfdb1e0e7dbdb8c9ab Mon Sep 17 00:00:00 2001
From: Sagi Grimberg <sagi@grimberg.me>
Date: Fri, 4 Sep 2020 12:50:39 -0700
Subject: [PATCH 1152/1341] IB/isert: Fix unaligned immediate-data handling

Currently we allocate rx buffers in a single contiguous buffers for
headers (iser and iscsi) and data trailer. This means that most likely the
data starting offset is aligned to 76 bytes (size of both headers).

This worked fine for years, but at some point this broke, resulting in
data corruptions in isert when a command comes with immediate data and the
underlying backend device assumes 512 bytes buffer alignment.

We assume a hard-requirement for all direct I/O buffers to be 512 bytes
aligned. To fix this, we should avoid passing unaligned buffers for I/O.

Instead, we allocate our recv buffers with some extra space such that we
can have the data portion align to 512 byte boundary. This also means that
we cannot reference headers or data using structure but rather
accessors (as they may move based on alignment). Also, get rid of the
wrong __packed annotation from iser_rx_desc as this has only harmful
effects (not aligned to anything).

This affects the rx descriptors for iscsi login and data plane.

Fixes: 3d75ca0adef4 ("block: introduce multi-page bvec helpers")
Link: https://lore.kernel.org/r/20200904195039.31687-1-sagi@grimberg.me
Reported-by: Stephen Rust <srust@blockbridge.com>
Tested-by: Doug Dumitru <doug@dumitru.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
 drivers/infiniband/ulp/isert/ib_isert.c | 93 +++++++++++++------------
 drivers/infiniband/ulp/isert/ib_isert.h | 41 ++++++++---
 2 files changed, 78 insertions(+), 56 deletions(-)

diff --git a/drivers/infiniband/ulp/isert/ib_isert.c b/drivers/infiniband/ulp/isert/ib_isert.c
index 61e2f7fc513d0..62a61ca949c55 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.c
+++ b/drivers/infiniband/ulp/isert/ib_isert.c
@@ -140,15 +140,15 @@ isert_alloc_rx_descriptors(struct isert_conn *isert_conn)
 	rx_desc = isert_conn->rx_descs;
 
 	for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++)  {
-		dma_addr = ib_dma_map_single(ib_dev, (void *)rx_desc,
-					ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+		dma_addr = ib_dma_map_single(ib_dev, rx_desc->buf,
+					ISER_RX_SIZE, DMA_FROM_DEVICE);
 		if (ib_dma_mapping_error(ib_dev, dma_addr))
 			goto dma_map_fail;
 
 		rx_desc->dma_addr = dma_addr;
 
 		rx_sg = &rx_desc->rx_sg;
-		rx_sg->addr = rx_desc->dma_addr;
+		rx_sg->addr = rx_desc->dma_addr + isert_get_hdr_offset(rx_desc);
 		rx_sg->length = ISER_RX_PAYLOAD_SIZE;
 		rx_sg->lkey = device->pd->local_dma_lkey;
 		rx_desc->rx_cqe.done = isert_recv_done;
@@ -160,7 +160,7 @@ isert_alloc_rx_descriptors(struct isert_conn *isert_conn)
 	rx_desc = isert_conn->rx_descs;
 	for (j = 0; j < i; j++, rx_desc++) {
 		ib_dma_unmap_single(ib_dev, rx_desc->dma_addr,
-				    ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+				    ISER_RX_SIZE, DMA_FROM_DEVICE);
 	}
 	kfree(isert_conn->rx_descs);
 	isert_conn->rx_descs = NULL;
@@ -181,7 +181,7 @@ isert_free_rx_descriptors(struct isert_conn *isert_conn)
 	rx_desc = isert_conn->rx_descs;
 	for (i = 0; i < ISERT_QP_MAX_RECV_DTOS; i++, rx_desc++)  {
 		ib_dma_unmap_single(ib_dev, rx_desc->dma_addr,
-				    ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+				    ISER_RX_SIZE, DMA_FROM_DEVICE);
 	}
 
 	kfree(isert_conn->rx_descs);
@@ -299,10 +299,9 @@ isert_free_login_buf(struct isert_conn *isert_conn)
 			    ISER_RX_PAYLOAD_SIZE, DMA_TO_DEVICE);
 	kfree(isert_conn->login_rsp_buf);
 
-	ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
-			    ISER_RX_PAYLOAD_SIZE,
-			    DMA_FROM_DEVICE);
-	kfree(isert_conn->login_req_buf);
+	ib_dma_unmap_single(ib_dev, isert_conn->login_desc->dma_addr,
+			    ISER_RX_SIZE, DMA_FROM_DEVICE);
+	kfree(isert_conn->login_desc);
 }
 
 static int
@@ -311,25 +310,25 @@ isert_alloc_login_buf(struct isert_conn *isert_conn,
 {
 	int ret;
 
-	isert_conn->login_req_buf = kzalloc(sizeof(*isert_conn->login_req_buf),
+	isert_conn->login_desc = kzalloc(sizeof(*isert_conn->login_desc),
 			GFP_KERNEL);
-	if (!isert_conn->login_req_buf)
+	if (!isert_conn->login_desc)
 		return -ENOMEM;
 
-	isert_conn->login_req_dma = ib_dma_map_single(ib_dev,
-				isert_conn->login_req_buf,
-				ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
-	ret = ib_dma_mapping_error(ib_dev, isert_conn->login_req_dma);
+	isert_conn->login_desc->dma_addr = ib_dma_map_single(ib_dev,
+				isert_conn->login_desc->buf,
+				ISER_RX_SIZE, DMA_FROM_DEVICE);
+	ret = ib_dma_mapping_error(ib_dev, isert_conn->login_desc->dma_addr);
 	if (ret) {
-		isert_err("login_req_dma mapping error: %d\n", ret);
-		isert_conn->login_req_dma = 0;
-		goto out_free_login_req_buf;
+		isert_err("login_desc dma mapping error: %d\n", ret);
+		isert_conn->login_desc->dma_addr = 0;
+		goto out_free_login_desc;
 	}
 
 	isert_conn->login_rsp_buf = kzalloc(ISER_RX_PAYLOAD_SIZE, GFP_KERNEL);
 	if (!isert_conn->login_rsp_buf) {
 		ret = -ENOMEM;
-		goto out_unmap_login_req_buf;
+		goto out_unmap_login_desc;
 	}
 
 	isert_conn->login_rsp_dma = ib_dma_map_single(ib_dev,
@@ -346,11 +345,11 @@ isert_alloc_login_buf(struct isert_conn *isert_conn,
 
 out_free_login_rsp_buf:
 	kfree(isert_conn->login_rsp_buf);
-out_unmap_login_req_buf:
-	ib_dma_unmap_single(ib_dev, isert_conn->login_req_dma,
-			    ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
-out_free_login_req_buf:
-	kfree(isert_conn->login_req_buf);
+out_unmap_login_desc:
+	ib_dma_unmap_single(ib_dev, isert_conn->login_desc->dma_addr,
+			    ISER_RX_SIZE, DMA_FROM_DEVICE);
+out_free_login_desc:
+	kfree(isert_conn->login_desc);
 	return ret;
 }
 
@@ -476,7 +475,7 @@ isert_connect_release(struct isert_conn *isert_conn)
 	if (isert_conn->qp)
 		isert_destroy_qp(isert_conn);
 
-	if (isert_conn->login_req_buf)
+	if (isert_conn->login_desc)
 		isert_free_login_buf(isert_conn);
 
 	isert_device_put(device);
@@ -862,17 +861,18 @@ isert_login_post_recv(struct isert_conn *isert_conn)
 	int ret;
 
 	memset(&sge, 0, sizeof(struct ib_sge));
-	sge.addr = isert_conn->login_req_dma;
+	sge.addr = isert_conn->login_desc->dma_addr +
+		isert_get_hdr_offset(isert_conn->login_desc);
 	sge.length = ISER_RX_PAYLOAD_SIZE;
 	sge.lkey = isert_conn->device->pd->local_dma_lkey;
 
 	isert_dbg("Setup sge: addr: %llx length: %d 0x%08x\n",
 		sge.addr, sge.length, sge.lkey);
 
-	isert_conn->login_req_buf->rx_cqe.done = isert_login_recv_done;
+	isert_conn->login_desc->rx_cqe.done = isert_login_recv_done;
 
 	memset(&rx_wr, 0, sizeof(struct ib_recv_wr));
-	rx_wr.wr_cqe = &isert_conn->login_req_buf->rx_cqe;
+	rx_wr.wr_cqe = &isert_conn->login_desc->rx_cqe;
 	rx_wr.sg_list = &sge;
 	rx_wr.num_sge = 1;
 
@@ -949,7 +949,7 @@ isert_put_login_tx(struct iscsi_conn *conn, struct iscsi_login *login,
 static void
 isert_rx_login_req(struct isert_conn *isert_conn)
 {
-	struct iser_rx_desc *rx_desc = isert_conn->login_req_buf;
+	struct iser_rx_desc *rx_desc = isert_conn->login_desc;
 	int rx_buflen = isert_conn->login_req_len;
 	struct iscsi_conn *conn = isert_conn->conn;
 	struct iscsi_login *login = conn->conn_login;
@@ -961,7 +961,7 @@ isert_rx_login_req(struct isert_conn *isert_conn)
 
 	if (login->first_request) {
 		struct iscsi_login_req *login_req =
-			(struct iscsi_login_req *)&rx_desc->iscsi_header;
+			(struct iscsi_login_req *)isert_get_iscsi_hdr(rx_desc);
 		/*
 		 * Setup the initial iscsi_login values from the leading
 		 * login request PDU.
@@ -980,13 +980,13 @@ isert_rx_login_req(struct isert_conn *isert_conn)
 		login->tsih		= be16_to_cpu(login_req->tsih);
 	}
 
-	memcpy(&login->req[0], (void *)&rx_desc->iscsi_header, ISCSI_HDR_LEN);
+	memcpy(&login->req[0], isert_get_iscsi_hdr(rx_desc), ISCSI_HDR_LEN);
 
 	size = min(rx_buflen, MAX_KEY_VALUE_PAIRS);
 	isert_dbg("Using login payload size: %d, rx_buflen: %d "
 		  "MAX_KEY_VALUE_PAIRS: %d\n", size, rx_buflen,
 		  MAX_KEY_VALUE_PAIRS);
-	memcpy(login->req_buf, &rx_desc->data[0], size);
+	memcpy(login->req_buf, isert_get_data(rx_desc), size);
 
 	if (login->first_request) {
 		complete(&isert_conn->login_comp);
@@ -1051,14 +1051,15 @@ isert_handle_scsi_cmd(struct isert_conn *isert_conn,
 	if (imm_data_len != data_len) {
 		sg_nents = max(1UL, DIV_ROUND_UP(imm_data_len, PAGE_SIZE));
 		sg_copy_from_buffer(cmd->se_cmd.t_data_sg, sg_nents,
-				    &rx_desc->data[0], imm_data_len);
+				    isert_get_data(rx_desc), imm_data_len);
 		isert_dbg("Copy Immediate sg_nents: %u imm_data_len: %d\n",
 			  sg_nents, imm_data_len);
 	} else {
 		sg_init_table(&isert_cmd->sg, 1);
 		cmd->se_cmd.t_data_sg = &isert_cmd->sg;
 		cmd->se_cmd.t_data_nents = 1;
-		sg_set_buf(&isert_cmd->sg, &rx_desc->data[0], imm_data_len);
+		sg_set_buf(&isert_cmd->sg, isert_get_data(rx_desc),
+				imm_data_len);
 		isert_dbg("Transfer Immediate imm_data_len: %d\n",
 			  imm_data_len);
 	}
@@ -1127,9 +1128,9 @@ isert_handle_iscsi_dataout(struct isert_conn *isert_conn,
 	}
 	isert_dbg("Copying DataOut: sg_start: %p, sg_off: %u "
 		  "sg_nents: %u from %p %u\n", sg_start, sg_off,
-		  sg_nents, &rx_desc->data[0], unsol_data_len);
+		  sg_nents, isert_get_data(rx_desc), unsol_data_len);
 
-	sg_copy_from_buffer(sg_start, sg_nents, &rx_desc->data[0],
+	sg_copy_from_buffer(sg_start, sg_nents, isert_get_data(rx_desc),
 			    unsol_data_len);
 
 	rc = iscsit_check_dataout_payload(cmd, hdr, false);
@@ -1188,7 +1189,7 @@ isert_handle_text_cmd(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd
 	}
 	cmd->text_in_ptr = text_in;
 
-	memcpy(cmd->text_in_ptr, &rx_desc->data[0], payload_length);
+	memcpy(cmd->text_in_ptr, isert_get_data(rx_desc), payload_length);
 
 	return iscsit_process_text_cmd(conn, cmd, hdr);
 }
@@ -1198,7 +1199,7 @@ isert_rx_opcode(struct isert_conn *isert_conn, struct iser_rx_desc *rx_desc,
 		uint32_t read_stag, uint64_t read_va,
 		uint32_t write_stag, uint64_t write_va)
 {
-	struct iscsi_hdr *hdr = &rx_desc->iscsi_header;
+	struct iscsi_hdr *hdr = isert_get_iscsi_hdr(rx_desc);
 	struct iscsi_conn *conn = isert_conn->conn;
 	struct iscsi_cmd *cmd;
 	struct isert_cmd *isert_cmd;
@@ -1296,8 +1297,8 @@ isert_recv_done(struct ib_cq *cq, struct ib_wc *wc)
 	struct isert_conn *isert_conn = wc->qp->qp_context;
 	struct ib_device *ib_dev = isert_conn->cm_id->device;
 	struct iser_rx_desc *rx_desc = cqe_to_rx_desc(wc->wr_cqe);
-	struct iscsi_hdr *hdr = &rx_desc->iscsi_header;
-	struct iser_ctrl *iser_ctrl = &rx_desc->iser_header;
+	struct iscsi_hdr *hdr = isert_get_iscsi_hdr(rx_desc);
+	struct iser_ctrl *iser_ctrl = isert_get_iser_hdr(rx_desc);
 	uint64_t read_va = 0, write_va = 0;
 	uint32_t read_stag = 0, write_stag = 0;
 
@@ -1311,7 +1312,7 @@ isert_recv_done(struct ib_cq *cq, struct ib_wc *wc)
 	rx_desc->in_use = true;
 
 	ib_dma_sync_single_for_cpu(ib_dev, rx_desc->dma_addr,
-			ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+			ISER_RX_SIZE, DMA_FROM_DEVICE);
 
 	isert_dbg("DMA: 0x%llx, iSCSI opcode: 0x%02x, ITT: 0x%08x, flags: 0x%02x dlen: %d\n",
 		 rx_desc->dma_addr, hdr->opcode, hdr->itt, hdr->flags,
@@ -1346,7 +1347,7 @@ isert_recv_done(struct ib_cq *cq, struct ib_wc *wc)
 			read_stag, read_va, write_stag, write_va);
 
 	ib_dma_sync_single_for_device(ib_dev, rx_desc->dma_addr,
-			ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+			ISER_RX_SIZE, DMA_FROM_DEVICE);
 }
 
 static void
@@ -1360,8 +1361,8 @@ isert_login_recv_done(struct ib_cq *cq, struct ib_wc *wc)
 		return;
 	}
 
-	ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_req_dma,
-			ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+	ib_dma_sync_single_for_cpu(ib_dev, isert_conn->login_desc->dma_addr,
+			ISER_RX_SIZE, DMA_FROM_DEVICE);
 
 	isert_conn->login_req_len = wc->byte_len - ISER_HEADERS_LEN;
 
@@ -1376,8 +1377,8 @@ isert_login_recv_done(struct ib_cq *cq, struct ib_wc *wc)
 	complete(&isert_conn->login_req_comp);
 	mutex_unlock(&isert_conn->mutex);
 
-	ib_dma_sync_single_for_device(ib_dev, isert_conn->login_req_dma,
-				ISER_RX_PAYLOAD_SIZE, DMA_FROM_DEVICE);
+	ib_dma_sync_single_for_device(ib_dev, isert_conn->login_desc->dma_addr,
+				ISER_RX_SIZE, DMA_FROM_DEVICE);
 }
 
 static void
diff --git a/drivers/infiniband/ulp/isert/ib_isert.h b/drivers/infiniband/ulp/isert/ib_isert.h
index c55f7d9bfced6..7fee4a65e181a 100644
--- a/drivers/infiniband/ulp/isert/ib_isert.h
+++ b/drivers/infiniband/ulp/isert/ib_isert.h
@@ -59,9 +59,11 @@
 				ISERT_MAX_TX_MISC_PDUS	+ \
 				ISERT_MAX_RX_MISC_PDUS)
 
-#define ISER_RX_PAD_SIZE	(ISCSI_DEF_MAX_RECV_SEG_LEN + 4096 - \
-		(ISER_RX_PAYLOAD_SIZE + sizeof(u64) + sizeof(struct ib_sge) + \
-		 sizeof(struct ib_cqe) + sizeof(bool)))
+/*
+ * RX size is default of 8k plus headers, but data needs to align to
+ * 512 boundary, so use 1024 to have the extra space for alignment.
+ */
+#define ISER_RX_SIZE		(ISCSI_DEF_MAX_RECV_SEG_LEN + 1024)
 
 /* Maximum support is 16MB I/O size */
 #define ISCSI_ISER_MAX_SG_TABLESIZE	4096
@@ -81,21 +83,41 @@ enum iser_conn_state {
 };
 
 struct iser_rx_desc {
-	struct iser_ctrl iser_header;
-	struct iscsi_hdr iscsi_header;
-	char		data[ISCSI_DEF_MAX_RECV_SEG_LEN];
+	char		buf[ISER_RX_SIZE];
 	u64		dma_addr;
 	struct ib_sge	rx_sg;
 	struct ib_cqe	rx_cqe;
 	bool		in_use;
-	char		pad[ISER_RX_PAD_SIZE];
-} __packed;
+};
 
 static inline struct iser_rx_desc *cqe_to_rx_desc(struct ib_cqe *cqe)
 {
 	return container_of(cqe, struct iser_rx_desc, rx_cqe);
 }
 
+static void *isert_get_iser_hdr(struct iser_rx_desc *desc)
+{
+	return PTR_ALIGN(desc->buf + ISER_HEADERS_LEN, 512) - ISER_HEADERS_LEN;
+}
+
+static size_t isert_get_hdr_offset(struct iser_rx_desc *desc)
+{
+	return isert_get_iser_hdr(desc) - (void *)desc->buf;
+}
+
+static void *isert_get_iscsi_hdr(struct iser_rx_desc *desc)
+{
+	return isert_get_iser_hdr(desc) + sizeof(struct iser_ctrl);
+}
+
+static void *isert_get_data(struct iser_rx_desc *desc)
+{
+	void *data = isert_get_iser_hdr(desc) + ISER_HEADERS_LEN;
+
+	WARN_ON((uintptr_t)data & 511);
+	return data;
+}
+
 struct iser_tx_desc {
 	struct iser_ctrl iser_header;
 	struct iscsi_hdr iscsi_header;
@@ -142,9 +164,8 @@ struct isert_conn {
 	u32			responder_resources;
 	u32			initiator_depth;
 	bool			pi_support;
-	struct iser_rx_desc	*login_req_buf;
+	struct iser_rx_desc	*login_desc;
 	char			*login_rsp_buf;
-	u64			login_req_dma;
 	int			login_req_len;
 	u64			login_rsp_dma;
 	struct iser_rx_desc	*rx_descs;
-- 
GitLab


From fcd2e4b9ca20faf6de959f67df5b454a5b055c56 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Wed, 26 Aug 2020 16:40:13 -0700
Subject: [PATCH 1153/1341] dt-bindings: spi: Fix spi-bcm-qspi compatible
 ordering

The binding is currently incorrectly defining the compatible strings
from least specifice to most specific instead of the converse. Re-order
them from most specific (left) to least specific (right) and fix the
examples as well.

Fixes: 5fc78f4c842a ("spi: Broadcom BRCMSTB, NSP, NS2 SoC bindings")
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 .../bindings/spi/brcm,spi-bcm-qspi.txt           | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt b/Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt
index f5e518d099f2c..62d4ed2d7fd79 100644
--- a/Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt
+++ b/Documentation/devicetree/bindings/spi/brcm,spi-bcm-qspi.txt
@@ -23,8 +23,8 @@ Required properties:
 
 - compatible:
     Must be one of :
-    "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-qspi" : MSPI+BSPI on BRCMSTB SoCs
-    "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI
+    "brcm,spi-brcmstb-qspi", "brcm,spi-bcm-qspi" : MSPI+BSPI on BRCMSTB SoCs
+    "brcm,spi-brcmstb-mspi", "brcm,spi-bcm-qspi" : Second Instance of MSPI
 						   BRCMSTB  SoCs
     "brcm,spi-bcm7425-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI
     			     			  			    BRCMSTB  SoCs
@@ -36,8 +36,8 @@ Required properties:
     			     			  			    BRCMSTB  SoCs
     "brcm,spi-bcm7278-qspi", "brcm,spi-bcm-qspi", "brcm,spi-brcmstb-mspi" : Second Instance of MSPI
     			     			  			    BRCMSTB  SoCs
-    "brcm,spi-bcm-qspi", "brcm,spi-nsp-qspi"     : MSPI+BSPI on Cygnus, NSP
-    "brcm,spi-bcm-qspi", "brcm,spi-ns2-qspi"     : NS2 SoCs
+    "brcm,spi-nsp-qspi", "brcm,spi-bcm-qspi"     : MSPI+BSPI on Cygnus, NSP
+    "brcm,spi-ns2-qspi", "brcm,spi-bcm-qspi"     : NS2 SoCs
 
 - reg:
     Define the bases and ranges of the associated I/O address spaces.
@@ -86,7 +86,7 @@ BRCMSTB SoC Example:
     spi@f03e3400 {
 		#address-cells = <0x1>;
 		#size-cells = <0x0>;
-		compatible = "brcm,spi-brcmstb-qspi", "brcm,spi-brcmstb-qspi";
+		compatible = "brcm,spi-brcmstb-qspi", "brcm,spi-bcm-qspi";
 		reg = <0xf03e0920 0x4 0xf03e3400 0x188 0xf03e3200 0x50>;
 		reg-names = "cs_reg", "mspi", "bspi";
 		interrupts = <0x6 0x5 0x4 0x3 0x2 0x1 0x0>;
@@ -149,7 +149,7 @@ BRCMSTB SoC Example:
 		#address-cells = <1>;
 		#size-cells = <0>;
 		clocks = <&upg_fixed>;
-		compatible = "brcm,spi-brcmstb-qspi", "brcm,spi-brcmstb-mspi";
+		compatible = "brcm,spi-brcmstb-mspi", "brcm,spi-bcm-qspi";
 		reg = <0xf0416000 0x180>;
 		reg-names = "mspi";
 		interrupts = <0x14>;
@@ -160,7 +160,7 @@ BRCMSTB SoC Example:
 iProc SoC Example:
 
     qspi: spi@18027200 {
-	compatible = "brcm,spi-bcm-qspi", "brcm,spi-nsp-qspi";
+	compatible = "brcm,spi-nsp-qspi", "brcm,spi-bcm-qspi";
 	reg = <0x18027200 0x184>,
 	      <0x18027000 0x124>,
 	      <0x1811c408 0x004>,
@@ -191,7 +191,7 @@ iProc SoC Example:
  NS2 SoC Example:
 
 	       qspi: spi@66470200 {
-		       compatible = "brcm,spi-bcm-qspi", "brcm,spi-ns2-qspi";
+		       compatible = "brcm,spi-ns2-qspi", "brcm,spi-bcm-qspi";
 		       reg = <0x66470200 0x184>,
 			     <0x66470000 0x124>,
 			     <0x67017408 0x004>,
-- 
GitLab


From d663186293a818af97c648624bee6c7a59e8218b Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Wed, 26 Aug 2020 16:43:41 -0700
Subject: [PATCH 1154/1341] ARM: dts: bcm: HR2: Fixed QSPI compatible string

The string was incorrectly defined before from least to most specific,
swap the compatible strings accordingly.

Fixes: b9099ec754b5 ("ARM: dts: Add Broadcom Hurricane 2 DTS include file")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/boot/dts/bcm-hr2.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/bcm-hr2.dtsi b/arch/arm/boot/dts/bcm-hr2.dtsi
index cbebed5f050eb..e8df458aad392 100644
--- a/arch/arm/boot/dts/bcm-hr2.dtsi
+++ b/arch/arm/boot/dts/bcm-hr2.dtsi
@@ -217,7 +217,7 @@ rng: rng@33000 {
 		};
 
 		qspi: spi@27200 {
-			compatible = "brcm,spi-bcm-qspi", "brcm,spi-nsp-qspi";
+			compatible = "brcm,spi-nsp-qspi", "brcm,spi-bcm-qspi";
 			reg = <0x027200 0x184>,
 			      <0x027000 0x124>,
 			      <0x11c408 0x004>,
-- 
GitLab


From d1ecc40a954fd0f5e3789b91fa80f15e82284e39 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Wed, 26 Aug 2020 16:44:25 -0700
Subject: [PATCH 1155/1341] ARM: dts: NSP: Fixed QSPI compatible string

The string was incorrectly defined before from least to most
specific, swap the compatible strings accordingly.

Fixes: 329f98c1974e ("ARM: dts: NSP: Add QSPI nodes to NSPI and bcm958625k DTSes")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/boot/dts/bcm-nsp.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/bcm-nsp.dtsi b/arch/arm/boot/dts/bcm-nsp.dtsi
index 0346ea621f0f9..c846fa3c244d3 100644
--- a/arch/arm/boot/dts/bcm-nsp.dtsi
+++ b/arch/arm/boot/dts/bcm-nsp.dtsi
@@ -284,7 +284,7 @@ nand: nand@26000 {
 		};
 
 		qspi: spi@27200 {
-			compatible = "brcm,spi-bcm-qspi", "brcm,spi-nsp-qspi";
+			compatible = "brcm,spi-nsp-qspi", "brcm,spi-bcm-qspi";
 			reg = <0x027200 0x184>,
 			      <0x027000 0x124>,
 			      <0x11c408 0x004>,
-- 
GitLab


From b793dab8d811e103665d6bddaaea1c25db3776eb Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Wed, 26 Aug 2020 16:45:29 -0700
Subject: [PATCH 1156/1341] ARM: dts: BCM5301X: Fixed QSPI compatible string

The string was incorrectly defined before from least to most
specific, swap the compatible strings accordingly.

Fixes: 1c8f40650723 ("ARM: dts: BCM5301X: convert to iProc QSPI")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm/boot/dts/bcm5301x.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/bcm5301x.dtsi b/arch/arm/boot/dts/bcm5301x.dtsi
index 2d9b4dd058307..0016720ce5300 100644
--- a/arch/arm/boot/dts/bcm5301x.dtsi
+++ b/arch/arm/boot/dts/bcm5301x.dtsi
@@ -488,7 +488,7 @@ nand: nand@18028000 {
 	};
 
 	spi@18029200 {
-		compatible = "brcm,spi-bcm-qspi", "brcm,spi-nsp-qspi";
+		compatible = "brcm,spi-nsp-qspi", "brcm,spi-bcm-qspi";
 		reg = <0x18029200 0x184>,
 		      <0x18029000 0x124>,
 		      <0x1811b408 0x004>,
-- 
GitLab


From 686e0a0c8c61e0e3f55321d0181fece3efd92777 Mon Sep 17 00:00:00 2001
From: Florian Fainelli <f.fainelli@gmail.com>
Date: Wed, 26 Aug 2020 16:49:19 -0700
Subject: [PATCH 1157/1341] arm64: dts: ns2: Fixed QSPI compatible string

The string was incorrectly defined before from least to most specific,
swap the compatible strings accordingly.

Fixes: ff73917d38a6 ("ARM64: dts: Add QSPI Device Tree node for NS2")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
---
 arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi b/arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi
index 15f7b0ed38369..39802066232e1 100644
--- a/arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi
+++ b/arch/arm64/boot/dts/broadcom/northstar2/ns2.dtsi
@@ -745,7 +745,7 @@ nand: nand@66460000 {
 		};
 
 		qspi: spi@66470200 {
-			compatible = "brcm,spi-bcm-qspi", "brcm,spi-ns2-qspi";
+			compatible = "brcm,spi-ns2-qspi", "brcm,spi-bcm-qspi";
 			reg = <0x66470200 0x184>,
 				<0x66470000 0x124>,
 				<0x67017408 0x004>,
-- 
GitLab


From 244359c99fd90f1c61c3944f93250f8219435c75 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Sat, 5 Sep 2020 15:58:36 +0300
Subject: [PATCH 1158/1341] scsi: libsas: Fix error path in
 sas_notify_lldd_dev_found()

In sas_notify_lldd_dev_found(), if we can't allocate the necessary
resources, then it seems like the wrong thing to mark the device as found
and to increment the reference count.  None of the callers ever drop the
reference in that situation.

[mkp: tweaked commit desc based on feedback from John]

Link: https://lore.kernel.org/r/20200905125836.GF183976@mwanda
Fixes: 735f7d2fedf5 ("[SCSI] libsas: fix domain_device leak")
Reviewed-by: Jason Yan <yanaijie@huawei.com>
Acked-by: John Garry <john.garry@huawei.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---
 drivers/scsi/libsas/sas_discover.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/libsas/sas_discover.c b/drivers/scsi/libsas/sas_discover.c
index daf951b0b3f55..13ad2b3d314e2 100644
--- a/drivers/scsi/libsas/sas_discover.c
+++ b/drivers/scsi/libsas/sas_discover.c
@@ -182,10 +182,11 @@ int sas_notify_lldd_dev_found(struct domain_device *dev)
 		pr_warn("driver on host %s cannot handle device %016llx, error:%d\n",
 			dev_name(sas_ha->dev),
 			SAS_ADDR(dev->sas_addr), res);
+		return res;
 	}
 	set_bit(SAS_DEV_FOUND, &dev->state);
 	kref_get(&dev->kref);
-	return res;
+	return 0;
 }
 
 
-- 
GitLab


From 73a203b0dc56d2e8d4facc3820b0fcab43a300e1 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Thu, 3 Sep 2020 10:26:36 +0200
Subject: [PATCH 1159/1341] clk: bcm: dvp: Select the reset framework

The DVP driver depends both on the RESET_SIMPLE driver but also on the
reset framework itself. Let's make sure we have it enabled.

Fixes: 1bc95972715a ("clk: bcm: Add BCM2711 DVP driver")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20200903082636.3844629-1-maxime@cerno.tech
Acked-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
 drivers/clk/bcm/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/bcm/Kconfig b/drivers/clk/bcm/Kconfig
index 784f12c72365b..ec738f74a026c 100644
--- a/drivers/clk/bcm/Kconfig
+++ b/drivers/clk/bcm/Kconfig
@@ -5,6 +5,7 @@ config CLK_BCM2711_DVP
 	depends on ARCH_BCM2835 ||COMPILE_TEST
 	depends on COMMON_CLK
 	default ARCH_BCM2835
+	select RESET_CONTROLLER
 	select RESET_SIMPLE
 	help
 	  Enable common clock framework support for the Broadcom BCM2711
-- 
GitLab


From da9c43dc0e2ec5c42a3d414e389feb30467000e2 Mon Sep 17 00:00:00 2001
From: Sumera Priyadarsini <sylphrenadin@gmail.com>
Date: Sat, 29 Aug 2020 23:27:04 +0530
Subject: [PATCH 1160/1341] clk: versatile: Add of_node_put() before return
 statement

Every iteration of for_each_available_child_of_node() decrements
the reference count of the previous node, however when control is
transferred from the middle of the loop, as in the case of a return
or break or goto, there is no decrement thus ultimately resulting in
a memory leak.

Fix a potential memory leak in clk-impd1.c by inserting
of_node_put() before a return statement.

Issue found with Coccinelle.

Signed-off-by: Sumera Priyadarsini <sylphrenadin@gmail.com>
Link: https://lore.kernel.org/r/20200829175704.GA10998@Kaladin
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
 drivers/clk/versatile/clk-impd1.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/versatile/clk-impd1.c b/drivers/clk/versatile/clk-impd1.c
index ca798249544d0..85c395df9c008 100644
--- a/drivers/clk/versatile/clk-impd1.c
+++ b/drivers/clk/versatile/clk-impd1.c
@@ -109,8 +109,10 @@ static int integrator_impd1_clk_probe(struct platform_device *pdev)
 
 	for_each_available_child_of_node(np, child) {
 		ret = integrator_impd1_clk_spawn(dev, np, child);
-		if (ret)
+		if (ret) {
+			of_node_put(child);
 			break;
+		}
 	}
 
 	return ret;
-- 
GitLab


From baaabecfc80fad255f866563b53b8c7a3eec176e Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Wed, 9 Sep 2020 15:53:54 -0700
Subject: [PATCH 1161/1341] test_firmware: Test platform fw loading on non-EFI
 systems

On non-EFI systems, it wasn't possible to test the platform firmware
loader because it will have never set "checked_fw" during __init.
Instead, allow the test code to override this check. Additionally split
the declarations into a private symbol namespace so there is greater
enforcement of the symbol visibility.

Fixes: 548193cba2a7 ("test_firmware: add support for firmware_request_platform")
Cc: stable@vger.kernel.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20200909225354.3118328-1-keescook@chromium.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/firmware/efi/embedded-firmware.c | 10 +++++-----
 include/linux/efi_embedded_fw.h          |  6 ++----
 lib/test_firmware.c                      |  9 +++++++++
 3 files changed, 16 insertions(+), 9 deletions(-)

diff --git a/drivers/firmware/efi/embedded-firmware.c b/drivers/firmware/efi/embedded-firmware.c
index e97a9c9d010c8..21ae0c48232a1 100644
--- a/drivers/firmware/efi/embedded-firmware.c
+++ b/drivers/firmware/efi/embedded-firmware.c
@@ -16,9 +16,9 @@
 
 /* Exported for use by lib/test_firmware.c only */
 LIST_HEAD(efi_embedded_fw_list);
-EXPORT_SYMBOL_GPL(efi_embedded_fw_list);
-
-static bool checked_for_fw;
+EXPORT_SYMBOL_NS_GPL(efi_embedded_fw_list, TEST_FIRMWARE);
+bool efi_embedded_fw_checked;
+EXPORT_SYMBOL_NS_GPL(efi_embedded_fw_checked, TEST_FIRMWARE);
 
 static const struct dmi_system_id * const embedded_fw_table[] = {
 #ifdef CONFIG_TOUCHSCREEN_DMI
@@ -116,14 +116,14 @@ void __init efi_check_for_embedded_firmwares(void)
 		}
 	}
 
-	checked_for_fw = true;
+	efi_embedded_fw_checked = true;
 }
 
 int efi_get_embedded_fw(const char *name, const u8 **data, size_t *size)
 {
 	struct efi_embedded_fw *iter, *fw = NULL;
 
-	if (!checked_for_fw) {
+	if (!efi_embedded_fw_checked) {
 		pr_warn("Warning %s called while we did not check for embedded fw\n",
 			__func__);
 		return -ENOENT;
diff --git a/include/linux/efi_embedded_fw.h b/include/linux/efi_embedded_fw.h
index 57eac5241303a..a97a12bb2c9ef 100644
--- a/include/linux/efi_embedded_fw.h
+++ b/include/linux/efi_embedded_fw.h
@@ -8,8 +8,8 @@
 #define EFI_EMBEDDED_FW_PREFIX_LEN		8
 
 /*
- * This struct and efi_embedded_fw_list are private to the efi-embedded fw
- * implementation they are in this header for use by lib/test_firmware.c only!
+ * This struct is private to the efi-embedded fw implementation.
+ * They are in this header for use by lib/test_firmware.c only!
  */
 struct efi_embedded_fw {
 	struct list_head list;
@@ -18,8 +18,6 @@ struct efi_embedded_fw {
 	size_t length;
 };
 
-extern struct list_head efi_embedded_fw_list;
-
 /**
  * struct efi_embedded_fw_desc - This struct is used by the EFI embedded-fw
  *                               code to search for embedded firmwares.
diff --git a/lib/test_firmware.c b/lib/test_firmware.c
index 9fee2b93a8d18..06c9550577564 100644
--- a/lib/test_firmware.c
+++ b/lib/test_firmware.c
@@ -26,6 +26,8 @@
 #include <linux/vmalloc.h>
 #include <linux/efi_embedded_fw.h>
 
+MODULE_IMPORT_NS(TEST_FIRMWARE);
+
 #define TEST_FIRMWARE_NAME	"test-firmware.bin"
 #define TEST_FIRMWARE_NUM_REQS	4
 #define TEST_FIRMWARE_BUF_SIZE	SZ_1K
@@ -489,6 +491,9 @@ static ssize_t trigger_request_store(struct device *dev,
 static DEVICE_ATTR_WO(trigger_request);
 
 #ifdef CONFIG_EFI_EMBEDDED_FIRMWARE
+extern struct list_head efi_embedded_fw_list;
+extern bool efi_embedded_fw_checked;
+
 static ssize_t trigger_request_platform_store(struct device *dev,
 					      struct device_attribute *attr,
 					      const char *buf, size_t count)
@@ -501,6 +506,7 @@ static ssize_t trigger_request_platform_store(struct device *dev,
 	};
 	struct efi_embedded_fw efi_embedded_fw;
 	const struct firmware *firmware = NULL;
+	bool saved_efi_embedded_fw_checked;
 	char *name;
 	int rc;
 
@@ -513,6 +519,8 @@ static ssize_t trigger_request_platform_store(struct device *dev,
 	efi_embedded_fw.data = (void *)test_data;
 	efi_embedded_fw.length = sizeof(test_data);
 	list_add(&efi_embedded_fw.list, &efi_embedded_fw_list);
+	saved_efi_embedded_fw_checked = efi_embedded_fw_checked;
+	efi_embedded_fw_checked = true;
 
 	pr_info("loading '%s'\n", name);
 	rc = firmware_request_platform(&firmware, name, dev);
@@ -530,6 +538,7 @@ static ssize_t trigger_request_platform_store(struct device *dev,
 	rc = count;
 
 out:
+	efi_embedded_fw_checked = saved_efi_embedded_fw_checked;
 	release_firmware(firmware);
 	list_del(&efi_embedded_fw.list);
 	kfree(name);
-- 
GitLab


From 7f6e1f3072b6842b2491b2cce28360e8cfea12ad Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Thu, 10 Sep 2020 18:42:38 +0200
Subject: [PATCH 1162/1341] Revert "dyndbg: fix problem parsing format="foo
 bar""

This reverts commit 42f07816ac0cc797928119cc039c414ae2b95d34 as it
still causes problems.  It will be resolved later, let's revert it so we
can also revert the original patch this was supposed to be helping with.

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Fixes: 42f07816ac0c ("dyndbg: fix problem parsing format="foo bar"")
Cc: Jim Cromie <jim.cromie@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 lib/dynamic_debug.c | 38 +++++++++++++++++++++-----------------
 1 file changed, 21 insertions(+), 17 deletions(-)

diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 04f4c80b0d162..08e4b057514c9 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -237,7 +237,6 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
 {
 	int nwords = 0;
 
-	vpr_info("entry, buf:'%s'\n", buf);
 	while (*buf) {
 		char *end;
 
@@ -248,8 +247,6 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
 		if (*buf == '#')
 			break;	/* token starts comment, skip rest of line */
 
-		vpr_info("start-of-word:%d '%s'\n", nwords, buf);
-
 		/* find `end' of word, whitespace separated or quoted */
 		if (*buf == '"' || *buf == '\'') {
 			int quote = *buf++;
@@ -260,9 +257,7 @@ static int ddebug_tokenize(char *buf, char *words[], int maxwords)
 				return -EINVAL;	/* unclosed quote */
 			}
 		} else {
-			for (end = buf;
-			     *end && *end != '=' && !isspace(*end);
-			     end++)
+			for (end = buf; *end && !isspace(*end); end++)
 				;
 			BUG_ON(end == buf);
 		}
@@ -378,21 +373,30 @@ static int ddebug_parse_query(char *words[], int nwords,
 	unsigned int i;
 	int rc = 0;
 	char *fline;
+	char *keyword, *arg;
 
-	if (nwords % 2 != 0) {
-		pr_err("expecting pairs of match-spec <value>\n");
-		return -EINVAL;
-	}
-	if (modname) {
+	if (modname)
 		/* support $modname.dyndbg=<multiple queries> */
-		vpr_info("module:%s queries:'%s'\n", modname);
 		query->module = modname;
-	}
-	for (i = 0; i < nwords; i += 2) {
-		char *keyword = words[i];
-		char *arg = words[i+1];
 
-		vpr_info("keyword:'%s' value:'%s'\n", keyword, arg);
+	for (i = 0; i < nwords; i++) {
+		/* accept keyword=arg */
+		vpr_info("%d w:%s\n", i, words[i]);
+
+		keyword = words[i];
+		arg = strchr(keyword, '=');
+		if (arg) {
+			*arg++ = '\0';
+		} else {
+			i++; /* next word is arg */
+			if (!(i < nwords)) {
+				pr_err("missing arg to keyword: %s\n", keyword);
+				return -EINVAL;
+			}
+			arg = words[i];
+		}
+		vpr_info("%d key:%s arg:%s\n", i, keyword, arg);
+
 		if (!strcmp(keyword, "func")) {
 			rc = check_set(&query->function, arg, "func");
 		} else if (!strcmp(keyword, "file")) {
-- 
GitLab


From 952e934d7f682a961c92eb9bbd521a4876e201fe Mon Sep 17 00:00:00 2001
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: Thu, 10 Sep 2020 18:45:03 +0200
Subject: [PATCH 1163/1341] Revert "dyndbg: accept query terms like file=bar
 and module=foo"

This reverts commit 14775b04964264189caa4a0862eac05dab8c0502 as there
were still some parsing problems with it, and the follow-on patch for
it.

Let's revisit it later, just drop it for now.

Cc: <jbaron@akamai.com>
Cc: Jim Cromie <jim.cromie@gmail.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 14775b049642 ("dyndbg: accept query terms like file=bar and module=foo")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 .../admin-guide/dynamic-debug-howto.rst       |  1 -
 lib/dynamic_debug.c                           | 53 +++++++------------
 2 files changed, 20 insertions(+), 34 deletions(-)

diff --git a/Documentation/admin-guide/dynamic-debug-howto.rst b/Documentation/admin-guide/dynamic-debug-howto.rst
index e5a8def45f3f8..6c04aea8f4cd8 100644
--- a/Documentation/admin-guide/dynamic-debug-howto.rst
+++ b/Documentation/admin-guide/dynamic-debug-howto.rst
@@ -156,7 +156,6 @@ against.  Possible keywords are:::
   ``line-range`` cannot contain space, e.g.
   "1-30" is valid range but "1 - 30" is not.
 
-  ``module=foo`` combined keyword=value form is interchangably accepted
 
 The meanings of each keyword are:
 
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 08e4b057514c9..2d4dfd44b0fa5 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -353,8 +353,7 @@ static int check_set(const char **dest, char *src, char *name)
 
 /*
  * Parse words[] as a ddebug query specification, which is a series
- * of (keyword, value) pairs or combined keyword=value terms,
- * chosen from these possibilities:
+ * of (keyword, value) pairs chosen from these possibilities:
  *
  * func <function-name>
  * file <full-pathname>
@@ -373,34 +372,22 @@ static int ddebug_parse_query(char *words[], int nwords,
 	unsigned int i;
 	int rc = 0;
 	char *fline;
-	char *keyword, *arg;
+
+	/* check we have an even number of words */
+	if (nwords % 2 != 0) {
+		pr_err("expecting pairs of match-spec <value>\n");
+		return -EINVAL;
+	}
 
 	if (modname)
 		/* support $modname.dyndbg=<multiple queries> */
 		query->module = modname;
 
-	for (i = 0; i < nwords; i++) {
-		/* accept keyword=arg */
-		vpr_info("%d w:%s\n", i, words[i]);
-
-		keyword = words[i];
-		arg = strchr(keyword, '=');
-		if (arg) {
-			*arg++ = '\0';
-		} else {
-			i++; /* next word is arg */
-			if (!(i < nwords)) {
-				pr_err("missing arg to keyword: %s\n", keyword);
-				return -EINVAL;
-			}
-			arg = words[i];
-		}
-		vpr_info("%d key:%s arg:%s\n", i, keyword, arg);
-
-		if (!strcmp(keyword, "func")) {
-			rc = check_set(&query->function, arg, "func");
-		} else if (!strcmp(keyword, "file")) {
-			if (check_set(&query->filename, arg, "file"))
+	for (i = 0; i < nwords; i += 2) {
+		if (!strcmp(words[i], "func")) {
+			rc = check_set(&query->function, words[i+1], "func");
+		} else if (!strcmp(words[i], "file")) {
+			if (check_set(&query->filename, words[i+1], "file"))
 				return -EINVAL;
 
 			/* tail :$info is function or line-range */
@@ -416,18 +403,18 @@ static int ddebug_parse_query(char *words[], int nwords,
 				if (parse_linerange(query, fline))
 					return -EINVAL;
 			}
-		} else if (!strcmp(keyword, "module")) {
-			rc = check_set(&query->module, arg, "module");
-		} else if (!strcmp(keyword, "format")) {
-			string_unescape_inplace(arg, UNESCAPE_SPACE |
+		} else if (!strcmp(words[i], "module")) {
+			rc = check_set(&query->module, words[i+1], "module");
+		} else if (!strcmp(words[i], "format")) {
+			string_unescape_inplace(words[i+1], UNESCAPE_SPACE |
 							    UNESCAPE_OCTAL |
 							    UNESCAPE_SPECIAL);
-			rc = check_set(&query->format, arg, "format");
-		} else if (!strcmp(keyword, "line")) {
-			if (parse_linerange(query, arg))
+			rc = check_set(&query->format, words[i+1], "format");
+		} else if (!strcmp(words[i], "line")) {
+			if (parse_linerange(query, words[i+1]))
 				return -EINVAL;
 		} else {
-			pr_err("unknown keyword \"%s\"\n", keyword);
+			pr_err("unknown keyword \"%s\"\n", words[i]);
 			return -EINVAL;
 		}
 		if (rc)
-- 
GitLab


From 57a2fb068a9513bf0fe51a1f2057235423330709 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@intel.com>
Date: Thu, 10 Sep 2020 15:48:58 +0800
Subject: [PATCH 1164/1341] powercap/intel_rapl: add support for TigerLake
 Desktop

Add intel_rapl support for the TigerLake desktop platform.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/powercap/intel_rapl_common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c
index 6f55aaef8afc9..60dbe0e43dd4e 100644
--- a/drivers/powercap/intel_rapl_common.c
+++ b/drivers/powercap/intel_rapl_common.c
@@ -1035,6 +1035,7 @@ static const struct x86_cpu_id rapl_ids[] __initconst = {
 	X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE_L,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L,		&rapl_defaults_core),
+	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X,	&rapl_defaults_spr_server),
 
 	X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT,	&rapl_defaults_byt),
-- 
GitLab


From 64e5f367155fe64854a0555bfa809af45f6e7e39 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@intel.com>
Date: Thu, 10 Sep 2020 15:49:11 +0800
Subject: [PATCH 1165/1341] powercap/intel_rapl: add support for RocketLake

Add intel_rapl support for the RocketLake platform.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/powercap/intel_rapl_common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c
index 60dbe0e43dd4e..55a219e968b36 100644
--- a/drivers/powercap/intel_rapl_common.c
+++ b/drivers/powercap/intel_rapl_common.c
@@ -1036,6 +1036,7 @@ static const struct x86_cpu_id rapl_ids[] __initconst = {
 	X86_MATCH_INTEL_FAM6_MODEL(COMETLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE,		&rapl_defaults_core),
+	X86_MATCH_INTEL_FAM6_MODEL(ROCKETLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X,	&rapl_defaults_spr_server),
 
 	X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT,	&rapl_defaults_byt),
-- 
GitLab


From ba92a4201167d945ccdc5a84e6a0994f7ab71870 Mon Sep 17 00:00:00 2001
From: Zhang Rui <rui.zhang@intel.com>
Date: Thu, 10 Sep 2020 15:49:21 +0800
Subject: [PATCH 1166/1341] powercap/intel_rapl: add support for AlderLake

Add intel_rapl support for the AlderLake platform.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/powercap/intel_rapl_common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c
index 55a219e968b36..25c764905f9bd 100644
--- a/drivers/powercap/intel_rapl_common.c
+++ b/drivers/powercap/intel_rapl_common.c
@@ -1037,6 +1037,7 @@ static const struct x86_cpu_id rapl_ids[] __initconst = {
 	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(ROCKETLAKE,		&rapl_defaults_core),
+	X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X,	&rapl_defaults_spr_server),
 
 	X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT,	&rapl_defaults_byt),
-- 
GitLab


From 95035eac763294eb4543aea9afd48d2f7c8caa5c Mon Sep 17 00:00:00 2001
From: Randy Dunlap <rdunlap@infradead.org>
Date: Sun, 6 Sep 2020 20:42:52 -0700
Subject: [PATCH 1167/1341] PM: <linux/device.h>: fix @em_pd kernel-doc warning

Fix kernel-doc warning in <linux/device.h>:

../include/linux/device.h:613: warning: Function parameter or member 'em_pd' not described in 'device'

Fixes: 1bc138c62295 ("PM / EM: add support for other devices than CPUs in Energy Model")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 include/linux/device.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/device.h b/include/linux/device.h
index ca18da4768e3e..9e6ea8931a52e 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -454,6 +454,7 @@ struct dev_links_info {
  * @pm_domain:	Provide callbacks that are executed during system suspend,
  * 		hibernation, system resume and during runtime PM transitions
  * 		along with subsystem-level and driver-level callbacks.
+ * @em_pd:	device's energy model performance domain
  * @pins:	For device pin management.
  *		See Documentation/driver-api/pinctl.rst for details.
  * @msi_list:	Hosts MSI descriptors
-- 
GitLab


From cc88b78c0870ebcab2123ba9e73689d97fbf3b14 Mon Sep 17 00:00:00 2001
From: Amit Kucheria <amitk@kernel.org>
Date: Thu, 10 Sep 2020 15:57:46 +0530
Subject: [PATCH 1168/1341] powercap: make documentation reflect code

Fix up the documentation of the struct powercap_control_type members
to match the code.

Also fixup stray whitespace.

Signed-off-by: Amit Kucheria <amitk@kernel.org>
[ rjw: Changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 include/linux/powercap.h | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/include/linux/powercap.h b/include/linux/powercap.h
index 4537f57f9e42f..3d557bbcd2c71 100644
--- a/include/linux/powercap.h
+++ b/include/linux/powercap.h
@@ -44,19 +44,18 @@ struct powercap_control_type_ops {
 };
 
 /**
- * struct powercap_control_type- Defines a powercap control_type
- * @name:		name of control_type
+ * struct powercap_control_type - Defines a powercap control_type
  * @dev:		device for this control_type
  * @idr:		idr to have unique id for its child
- * @root_node:		Root holding power zones for this control_type
+ * @nr_zones:		counter for number of zones of this type
  * @ops:		Pointer to callback struct
- * @node_lock:		mutex for control type
+ * @lock:		mutex for control type
  * @allocated:		This is possible that client owns the memory
  *			used by this structure. In this case
  *			this flag is set to false by framework to
  *			prevent deallocation during release process.
  *			Otherwise this flag is set to true.
- * @ctrl_inst:		link to the control_type list
+ * @node:		linked-list node
  *
  * Defines powercap control_type. This acts as a container for power
  * zones, which use same method to control power. E.g. RAPL, RAPL-PCI etc.
@@ -129,7 +128,7 @@ struct powercap_zone_ops {
  *			this flag is set to false by framework to
  *			prevent deallocation during release process.
  *			Otherwise this flag is set to true.
- * @constraint_ptr:	List of constraints for this zone.
+ * @constraints:	List of constraints for this zone.
  *
  * This defines a power zone instance. The fields of this structure are
  * private, and should not be used by client drivers.
-- 
GitLab


From d2249bf25c565b6e310453962fef63f8d38677a6 Mon Sep 17 00:00:00 2001
From: Jing Xiangfeng <jingxiangfeng@huawei.com>
Date: Thu, 27 Aug 2020 22:16:29 +0800
Subject: [PATCH 1169/1341] clk: qcom: lpass: Correct goto target in
 lpass_core_sc7180_probe()

lpass_core_sc7180_probe() misses to call pm_clk_destroy() and
pm_runtime_disable() in error paths. Correct goto target to fix it.
This issue is found by code inspection.

Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Link: https://lore.kernel.org/r/20200827141629.101802-1-jingxiangfeng@huawei.com
Fixes: edab812d802d ("clk: qcom: lpass: Add support for LPASS clock controller for SC7180")
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
---
 drivers/clk/qcom/lpasscorecc-sc7180.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/qcom/lpasscorecc-sc7180.c b/drivers/clk/qcom/lpasscorecc-sc7180.c
index d4c1864e1ee94..228d08f5d26fa 100644
--- a/drivers/clk/qcom/lpasscorecc-sc7180.c
+++ b/drivers/clk/qcom/lpasscorecc-sc7180.c
@@ -420,17 +420,18 @@ static int lpass_core_sc7180_probe(struct platform_device *pdev)
 	pm_runtime_enable(&pdev->dev);
 	ret = pm_clk_create(&pdev->dev);
 	if (ret)
-		return ret;
+		goto disable_pm_runtime;
 
 	ret = pm_clk_add(&pdev->dev, "iface");
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to acquire iface clock\n");
-		goto disable_pm_runtime;
+		goto destroy_pm_clk;
 	}
 
+	ret = -EINVAL;
 	clk_probe = of_device_get_match_data(&pdev->dev);
 	if (!clk_probe)
-		return -EINVAL;
+		goto destroy_pm_clk;
 
 	ret = clk_probe(pdev);
 	if (ret)
-- 
GitLab


From 7a8379eb41a47d37e93d34f09ca1c3b7d10de073 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Fri, 11 Sep 2020 16:44:45 +0200
Subject: [PATCH 1170/1341] ACPICA: Add support for using logical addresses of
 GPE blocks

The logical address of every GPE block in system memory must be
known before passing it to acpi_ev_initialize_gpe_block(), because
memory cannot be mapped on the fly from an interrupt handler.
Accordingly, the host OS must map every GPE block in system
memory upfront and it can store the logical addresses of GPE
blocks for future use.

If these logical addresses were known to ACPICA, it could use them
instead of the corresponding physical addresses of GPE block for
GPE register accesses and the memory mapping lookups carried out
by acpi_os_read_memory() and acpi_os_write_memory() on every
attempt to access a GPE register would not be necessary any more.

To allow that to happen, introduce the ACPI_GPE_USE_LOGICAL_ADDRESSES
symbol to indicate whether or not the host OS wants ACPICA to use the
logical addresses of GPE registers in system memory directly (which
is the case if this symbol is defined).  Moreover, conditional on
whether ACPI_GPE_USE_LOGICAL_ADDRESSES is defined, introduce two new
global variables for storing the logical addresses of the FADT GPE
blocks 0 and 1, respectively, acpi_gbl_xgpe0_block_logical_address and
acpi_gbl_xgpe1_block_logical_address, make acpi_ev_gpe_initialize()
pass their values instead of the physical addresses of the GPE blocks
in question to acpi_ev_create_gpe_block() and modify
acpi_hw_gpe_read() and acpi_hw_gpe_write() to access memory directly
via the addresses stored in the struct acpi_gpe_address objects,
which are expected to be the logical addresses of GPE registers if
ACPI_GPE_USE_LOGICAL_ADDRESSES is defined.

With the above changes in place, a host OS wanting ACPICA to
access GPE registers directly through their logical addresses
needs to define the ACPI_GPE_USE_LOGICAL_ADDRESSES symbol and
make sure that the logical addresses of the FADT GPE blocks 0
and 1 are stored in acpi_gbl_xgpe0_block_logical_address and
acpi_gbl_xgpe1_block_logical_address, respectively, prior to
calling acpi_ev_gpe_initialize().

[If such a host OS also uses acpi_install_gpe_block() to add
 non-FADT GPE register blocks located in system memory, it must
 pass their logical addresses instead of their physical addresses
 to this function.]

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/acpica/acglobal.h  |  6 ++++++
 drivers/acpi/acpica/evgpeinit.c | 23 +++++++++++++++++------
 drivers/acpi/acpica/hwgpe.c     | 10 ++++++++++
 3 files changed, 33 insertions(+), 6 deletions(-)

diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index 1030a0ce15998..2fee91f57b213 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -42,6 +42,12 @@ ACPI_GLOBAL(struct acpi_generic_address, acpi_gbl_xpm1a_enable);
 ACPI_GLOBAL(struct acpi_generic_address, acpi_gbl_xpm1b_status);
 ACPI_GLOBAL(struct acpi_generic_address, acpi_gbl_xpm1b_enable);
 
+#ifdef ACPI_GPE_USE_LOGICAL_ADDRESSES
+ACPI_GLOBAL(unsigned long, acpi_gbl_xgpe0_block_logical_address);
+ACPI_GLOBAL(unsigned long, acpi_gbl_xgpe1_block_logical_address);
+
+#endif				/* ACPI_GPE_USE_LOGICAL_ADDRESSES */
+
 /*
  * Handle both ACPI 1.0 and ACPI 2.0+ Integer widths. The integer width is
  * determined by the revision of the DSDT: If the DSDT revision is less than
diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c
index 6effd8076dcc8..6d82d30d8f7b0 100644
--- a/drivers/acpi/acpica/evgpeinit.c
+++ b/drivers/acpi/acpica/evgpeinit.c
@@ -32,6 +32,16 @@ ACPI_MODULE_NAME("evgpeinit")
  * kernel boot time as well.
  */
 
+#ifdef ACPI_GPE_USE_LOGICAL_ADDRESSES
+#define ACPI_FADT_GPE_BLOCK_ADDRESS(N)	\
+	acpi_gbl_FADT.xgpe##N##_block.space_id == \
+					ACPI_ADR_SPACE_SYSTEM_MEMORY ? \
+		(u64)acpi_gbl_xgpe##N##_block_logical_address : \
+		acpi_gbl_FADT.xgpe##N##_block.address
+#else
+#define ACPI_FADT_GPE_BLOCK_ADDRESS(N)	acpi_gbl_FADT.xgpe##N##_block.address
+#endif		/* ACPI_GPE_USE_LOGICAL_ADDRESSES */
+
 /*******************************************************************************
  *
  * FUNCTION:    acpi_ev_gpe_initialize
@@ -49,6 +59,7 @@ acpi_status acpi_ev_gpe_initialize(void)
 	u32 register_count1 = 0;
 	u32 gpe_number_max = 0;
 	acpi_status status;
+	u64 address;
 
 	ACPI_FUNCTION_TRACE(ev_gpe_initialize);
 
@@ -85,8 +96,9 @@ acpi_status acpi_ev_gpe_initialize(void)
 	 * If EITHER the register length OR the block address are zero, then that
 	 * particular block is not supported.
 	 */
-	if (acpi_gbl_FADT.gpe0_block_length &&
-	    acpi_gbl_FADT.xgpe0_block.address) {
+	address = ACPI_FADT_GPE_BLOCK_ADDRESS(0);
+
+	if (acpi_gbl_FADT.gpe0_block_length && address) {
 
 		/* GPE block 0 exists (has both length and address > 0) */
 
@@ -97,7 +109,6 @@ acpi_status acpi_ev_gpe_initialize(void)
 		/* Install GPE Block 0 */
 
 		status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
-						  acpi_gbl_FADT.xgpe0_block.
 						  address,
 						  acpi_gbl_FADT.xgpe0_block.
 						  space_id, register_count0, 0,
@@ -110,8 +121,9 @@ acpi_status acpi_ev_gpe_initialize(void)
 		}
 	}
 
-	if (acpi_gbl_FADT.gpe1_block_length &&
-	    acpi_gbl_FADT.xgpe1_block.address) {
+	address = ACPI_FADT_GPE_BLOCK_ADDRESS(1);
+
+	if (acpi_gbl_FADT.gpe1_block_length && address) {
 
 		/* GPE block 1 exists (has both length and address > 0) */
 
@@ -137,7 +149,6 @@ acpi_status acpi_ev_gpe_initialize(void)
 
 			status =
 			    acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
-						     acpi_gbl_FADT.xgpe1_block.
 						     address,
 						     acpi_gbl_FADT.xgpe1_block.
 						     space_id, register_count1,
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
index a0e71f34c77ab..37bb67ef32325 100644
--- a/drivers/acpi/acpica/hwgpe.c
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -46,8 +46,13 @@ acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_gpe_address *reg)
 	u32 value32;
 
 	if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+#ifdef ACPI_GPE_USE_LOGICAL_ADDRESSES
+		*value = (u64)ACPI_GET8(reg->address);
+		return_ACPI_STATUS(AE_OK);
+#else
 		return acpi_os_read_memory((acpi_physical_address)reg->address,
 					    value, ACPI_GPE_REGISTER_WIDTH);
+#endif
 	}
 
 	status = acpi_os_read_port((acpi_io_address)reg->address,
@@ -76,8 +81,13 @@ acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_gpe_address *reg)
 acpi_status acpi_hw_gpe_write(u64 value, struct acpi_gpe_address *reg)
 {
 	if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+#ifdef ACPI_GPE_USE_LOGICAL_ADDRESSES
+		ACPI_SET8(reg->address, value);
+		return_ACPI_STATUS(AE_OK);
+#else
 		return acpi_os_write_memory((acpi_physical_address)reg->address,
 					    value, ACPI_GPE_REGISTER_WIDTH);
+#endif
 	}
 
 	return acpi_os_write_port((acpi_io_address)reg->address, (u32)value,
-- 
GitLab


From 6915564dc5a8ab831a016e0cd0a8a3c68230287b Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Fri, 11 Sep 2020 14:59:35 +0200
Subject: [PATCH 1171/1341] ACPI: OSL: Change the type of
 acpi_os_map_generic_address() return value

Modify acpi_os_map_generic_address() to return the pointer returned
by acpi_os_map_iomem() which represents the logical address
corresponding to the struct acpi_generic_address argument passed to
it or NULL if that address cannot be obtained (for example, the
argument does not represent an address in system memory or it could
not be mapped by the OS).

Among other things, that will allow the ACPI OS layer to pass the
logical addresses of the FADT GPE blocks 0 and 1 to ACPICA going
forward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/apei/apei-base.c |  6 +++++-
 drivers/acpi/osl.c            | 18 +++++++-----------
 include/acpi/acpi_io.h        |  2 +-
 3 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
index e358d00464947..552fd9ffaca4e 100644
--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -632,7 +632,11 @@ int apei_map_generic_address(struct acpi_generic_address *reg)
 	rc = apei_check_gar(reg, &address, &access_bit_width);
 	if (rc)
 		return rc;
-	return acpi_os_map_generic_address(reg);
+
+	if (!acpi_os_map_generic_address(reg))
+		return -ENXIO;
+
+	return 0;
 }
 EXPORT_SYMBOL_GPL(apei_map_generic_address);
 
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 4a0b07792233e..3a50d8fa310bf 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -447,24 +447,19 @@ void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
 }
 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
 
-int acpi_os_map_generic_address(struct acpi_generic_address *gas)
+void __iomem *acpi_os_map_generic_address(struct acpi_generic_address *gas)
 {
 	u64 addr;
-	void __iomem *virt;
 
 	if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
-		return 0;
+		return NULL;
 
 	/* Handle possible alignment issues */
 	memcpy(&addr, &gas->address, sizeof(addr));
 	if (!addr || !gas->bit_width)
-		return -EINVAL;
-
-	virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
-	if (!virt)
-		return -EIO;
+		return NULL;
 
-	return 0;
+	return acpi_os_map_iomem(addr, gas->bit_width / 8);
 }
 EXPORT_SYMBOL(acpi_os_map_generic_address);
 
@@ -1756,10 +1751,11 @@ acpi_status __init acpi_os_initialize(void)
 		 * Use acpi_os_map_generic_address to pre-map the reset
 		 * register if it's in system memory.
 		 */
-		int rv;
+		void *rv;
 
 		rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
-		pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
+		pr_debug(PREFIX "%s: map reset_reg %s\n", __func__,
+			 rv ? "successful" : "failed");
 	}
 	acpi_os_initialized = true;
 
diff --git a/include/acpi/acpi_io.h b/include/acpi/acpi_io.h
index 12d8bd333fe74..027faa8883aab 100644
--- a/include/acpi/acpi_io.h
+++ b/include/acpi/acpi_io.h
@@ -21,7 +21,7 @@ void __iomem __ref
 void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size);
 void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size);
 
-int acpi_os_map_generic_address(struct acpi_generic_address *addr);
+void __iomem *acpi_os_map_generic_address(struct acpi_generic_address *addr);
 void acpi_os_unmap_generic_address(struct acpi_generic_address *addr);
 
 #endif
-- 
GitLab


From 85f94020033f931a5918ab26281b2afbe4d68b73 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Fri, 11 Sep 2020 14:59:42 +0200
Subject: [PATCH 1172/1341] ACPI: OSL: Make ACPICA use logical addresses of GPE
 blocks

Define ACPI_GPE_USE_LOGICAL_ADDRESSES in aclinux.h and modify
acpi_os_initialize() to store the logical addresses of the FADT GPE
blocks 0 and 1 in acpi_gbl_xgpe0_block_logical_address and
acpi_gbl_xgpe1_block_logical_address, respectively, so as to allow
ACPICA to use them for accessing GPE registers in system memory,
instead of using their physical addresses and looking up the
corresponding logical addresses on every access attempt, which is
inefficient.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/osl.c              | 12 ++++++++++--
 include/acpi/platform/aclinux.h |  4 ++++
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c
index 3a50d8fa310bf..0418febc5cf20 100644
--- a/drivers/acpi/osl.c
+++ b/drivers/acpi/osl.c
@@ -1744,8 +1744,12 @@ acpi_status __init acpi_os_initialize(void)
 {
 	acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
 	acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
-	acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
-	acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
+
+	acpi_gbl_xgpe0_block_logical_address =
+		(unsigned long)acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
+	acpi_gbl_xgpe1_block_logical_address =
+		(unsigned long)acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
+
 	if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
 		/*
 		 * Use acpi_os_map_generic_address to pre-map the reset
@@ -1783,8 +1787,12 @@ acpi_status acpi_os_terminate(void)
 
 	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
 	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
+	acpi_gbl_xgpe0_block_logical_address = 0UL;
+	acpi_gbl_xgpe1_block_logical_address = 0UL;
+
 	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
 	acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
+
 	if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
 		acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
 
diff --git a/include/acpi/platform/aclinux.h b/include/acpi/platform/aclinux.h
index 987e2af7c3356..4151c76141fac 100644
--- a/include/acpi/platform/aclinux.h
+++ b/include/acpi/platform/aclinux.h
@@ -118,6 +118,10 @@
 
 #define USE_NATIVE_ALLOCATE_ZEROED
 
+/* Use logical addresses for accessing GPE registers in system memory */
+
+#define ACPI_GPE_USE_LOGICAL_ADDRESSES
+
 /*
  * Overrides for in-kernel ACPICA
  */
-- 
GitLab


From 40249c6962075c040fd071339acae524f18bfac9 Mon Sep 17 00:00:00 2001
From: Peter Oberparleiter <oberpar@linux.ibm.com>
Date: Thu, 10 Sep 2020 14:52:01 +0200
Subject: [PATCH 1173/1341] gcov: add support for GCC 10.1

Using gcov to collect coverage data for kernels compiled with GCC 10.1
causes random malfunctions and kernel crashes.  This is the result of a
changed GCOV_COUNTERS value in GCC 10.1 that causes a mismatch between
the layout of the gcov_info structure created by GCC profiling code and
the related structure used by the kernel.

Fix this by updating the in-kernel GCOV_COUNTERS value.  Also re-enable
config GCOV_KERNEL for use with GCC 10.

Reported-by: Colin Ian King <colin.king@canonical.com>
Reported-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Tested-by: Leon Romanovsky <leonro@nvidia.com>
Tested-and-Acked-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 kernel/gcov/Kconfig   | 1 -
 kernel/gcov/gcc_4_7.c | 4 +++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig
index bb4b680e8455a..3110c77230c7f 100644
--- a/kernel/gcov/Kconfig
+++ b/kernel/gcov/Kconfig
@@ -4,7 +4,6 @@ menu "GCOV-based kernel profiling"
 config GCOV_KERNEL
 	bool "Enable gcov-based kernel profiling"
 	depends on DEBUG_FS
-	depends on !CC_IS_GCC || GCC_VERSION < 100000
 	select CONSTRUCTORS if !UML
 	default n
 	help
diff --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c
index 908fdf5098c32..53c67c87f141b 100644
--- a/kernel/gcov/gcc_4_7.c
+++ b/kernel/gcov/gcc_4_7.c
@@ -19,7 +19,9 @@
 #include <linux/vmalloc.h>
 #include "gcov.h"
 
-#if (__GNUC__ >= 7)
+#if (__GNUC__ >= 10)
+#define GCOV_COUNTERS			8
+#elif (__GNUC__ >= 7)
 #define GCOV_COUNTERS			9
 #elif (__GNUC__ > 5) || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1)
 #define GCOV_COUNTERS			10
-- 
GitLab


From 43fea4e42599c3eb4109996698f5c25761d3f815 Mon Sep 17 00:00:00 2001
From: Peter Shier <pshier@google.com>
Date: Thu, 20 Aug 2020 16:05:45 -0700
Subject: [PATCH 1174/1341] KVM: nVMX: Update VMCS02 when L2 PAE PDPTE updates
 detected

When L2 uses PAE, L0 intercepts of L2 writes to CR0/CR3/CR4 call
load_pdptrs to read the possibly updated PDPTEs from the guest
physical address referenced by CR3.  It loads them into
vcpu->arch.walk_mmu->pdptrs and sets VCPU_EXREG_PDPTR in
vcpu->arch.regs_dirty.

At the subsequent assumed reentry into L2, the mmu will call
vmx_load_mmu_pgd which calls ept_load_pdptrs. ept_load_pdptrs sees
VCPU_EXREG_PDPTR set in vcpu->arch.regs_dirty and loads
VMCS02.GUEST_PDPTRn from vcpu->arch.walk_mmu->pdptrs[]. This all works
if the L2 CRn write intercept always resumes L2.

The resume path calls vmx_check_nested_events which checks for
exceptions, MTF, and expired VMX preemption timers. If
vmx_check_nested_events finds any of these conditions pending it will
reflect the corresponding exit into L1. Live migration at this point
would also cause a missed immediate reentry into L2.

After L1 exits, vmx_vcpu_run calls vmx_register_cache_reset which
clears VCPU_EXREG_PDPTR in vcpu->arch.regs_dirty.  When L2 next
resumes, ept_load_pdptrs finds VCPU_EXREG_PDPTR clear in
vcpu->arch.regs_dirty and does not load VMCS02.GUEST_PDPTRn from
vcpu->arch.walk_mmu->pdptrs[]. prepare_vmcs02 will then load
VMCS02.GUEST_PDPTRn from vmcs12->pdptr0/1/2/3 which contain the stale
values stored at last L2 exit. A repro of this bug showed L2 entering
triple fault immediately due to the bad VMCS02.GUEST_PDPTRn values.

When L2 is in PAE paging mode add a call to ept_load_pdptrs before
leaving L2. This will update VMCS02.GUEST_PDPTRn if they are dirty in
vcpu->arch.walk_mmu->pdptrs[].

Tested:
kvm-unit-tests with new directed test: vmx_mtf_pdpte_test.
Verified that test fails without the fix.

Also ran Google internal VMM with an Ubuntu 16.04 4.4.0-83 guest running a
custom hypervisor with a 32-bit Windows XP L2 guest using PAE. Prior to fix
would repro readily. Ran 14 simultaneous L2s for 140 iterations with no
failures.

Signed-off-by: Peter Shier <pshier@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Message-Id: <20200820230545.2411347-1-pshier@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/vmx/nested.c | 8 ++++++++
 arch/x86/kvm/vmx/vmx.c    | 4 ++--
 arch/x86/kvm/vmx/vmx.h    | 1 +
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 23b58c28a1c92..d7482ccf6a8de 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -4404,6 +4404,14 @@ void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
 	if (kvm_check_request(KVM_REQ_TLB_FLUSH_CURRENT, vcpu))
 		kvm_vcpu_flush_tlb_current(vcpu);
 
+	/*
+	 * VCPU_EXREG_PDPTR will be clobbered in arch/x86/kvm/vmx/vmx.h between
+	 * now and the new vmentry.  Ensure that the VMCS02 PDPTR fields are
+	 * up-to-date before switching to L1.
+	 */
+	if (enable_ept && is_pae_paging(vcpu))
+		vmx_ept_load_pdptrs(vcpu);
+
 	leave_guest_mode(vcpu);
 
 	if (nested_cpu_has_preemption_timer(vmcs12))
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 46ba2e03a8926..19a599bebd5cf 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2971,7 +2971,7 @@ static void vmx_flush_tlb_guest(struct kvm_vcpu *vcpu)
 	vpid_sync_context(to_vmx(vcpu)->vpid);
 }
 
-static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
+void vmx_ept_load_pdptrs(struct kvm_vcpu *vcpu)
 {
 	struct kvm_mmu *mmu = vcpu->arch.walk_mmu;
 
@@ -3114,7 +3114,7 @@ static void vmx_load_mmu_pgd(struct kvm_vcpu *vcpu, unsigned long pgd,
 			guest_cr3 = vcpu->arch.cr3;
 		else /* vmcs01.GUEST_CR3 is already up-to-date. */
 			update_guest_cr3 = false;
-		ept_load_pdptrs(vcpu);
+		vmx_ept_load_pdptrs(vcpu);
 	} else {
 		guest_cr3 = pgd;
 	}
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 26175a4759fa5..a2f82127c1707 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -356,6 +356,7 @@ void vmx_update_host_rsp(struct vcpu_vmx *vmx, unsigned long host_rsp);
 int vmx_find_msr_index(struct vmx_msrs *m, u32 msr);
 int vmx_handle_memory_failure(struct kvm_vcpu *vcpu, int r,
 			      struct x86_exception *e);
+void vmx_ept_load_pdptrs(struct kvm_vcpu *vcpu);
 
 #define POSTED_INTR_ON  0
 #define POSTED_INTR_SN  1
-- 
GitLab


From 0f990222108d214a0924d920e6095b58107d7b59 Mon Sep 17 00:00:00 2001
From: Haiwei Li <lihaiwei@tencent.com>
Date: Tue, 1 Sep 2020 19:41:37 +0800
Subject: [PATCH 1175/1341] KVM: Check the allocation of pv cpu mask

check the allocation of per-cpu __pv_cpu_mask. Initialize ops only when
successful.

Signed-off-by: Haiwei Li <lihaiwei@tencent.com>
Message-Id: <d59f05df-e6d3-3d31-a036-cc25a2b2f33f@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kernel/kvm.c | 22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 08320b0b2b276..9e7dd3a96873e 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -654,7 +654,6 @@ static void __init kvm_guest_init(void)
 	}
 
 	if (pv_tlb_flush_supported()) {
-		pv_ops.mmu.flush_tlb_others = kvm_flush_tlb_others;
 		pv_ops.mmu.tlb_remove_table = tlb_remove_table;
 		pr_info("KVM setup pv remote TLB flush\n");
 	}
@@ -767,6 +766,14 @@ static __init int activate_jump_labels(void)
 }
 arch_initcall(activate_jump_labels);
 
+static void kvm_free_pv_cpu_mask(void)
+{
+	unsigned int cpu;
+
+	for_each_possible_cpu(cpu)
+		free_cpumask_var(per_cpu(__pv_cpu_mask, cpu));
+}
+
 static __init int kvm_alloc_cpumask(void)
 {
 	int cpu;
@@ -785,11 +792,20 @@ static __init int kvm_alloc_cpumask(void)
 
 	if (alloc)
 		for_each_possible_cpu(cpu) {
-			zalloc_cpumask_var_node(per_cpu_ptr(&__pv_cpu_mask, cpu),
-				GFP_KERNEL, cpu_to_node(cpu));
+			if (!zalloc_cpumask_var_node(
+				per_cpu_ptr(&__pv_cpu_mask, cpu),
+				GFP_KERNEL, cpu_to_node(cpu))) {
+				goto zalloc_cpumask_fail;
+			}
 		}
 
+	apic->send_IPI_mask_allbutself = kvm_send_ipi_mask_allbutself;
+	pv_ops.mmu.flush_tlb_others = kvm_flush_tlb_others;
 	return 0;
+
+zalloc_cpumask_fail:
+	kvm_free_pv_cpu_mask();
+	return -ENOMEM;
 }
 arch_initcall(kvm_alloc_cpumask);
 
-- 
GitLab


From f65886606c2d3b562716de030706dfe1bea4ed5e Mon Sep 17 00:00:00 2001
From: Rustam Kovhaev <rkovhaev@gmail.com>
Date: Mon, 7 Sep 2020 11:55:35 -0700
Subject: [PATCH 1176/1341] KVM: fix memory leak in kvm_io_bus_unregister_dev()

when kmalloc() fails in kvm_io_bus_unregister_dev(), before removing
the bus, we should iterate over all other devices linked to it and call
kvm_iodevice_destructor() for them

Fixes: 90db10434b16 ("KVM: kvm_io_bus_unregister_dev() should never fail")
Cc: stable@vger.kernel.org
Reported-and-tested-by: syzbot+f196caa45793d6374707@syzkaller.appspotmail.com
Link: https://syzkaller.appspot.com/bug?extid=f196caa45793d6374707
Signed-off-by: Rustam Kovhaev <rkovhaev@gmail.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200907185535.233114-1-rkovhaev@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 virt/kvm/kvm_main.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 67cd0b88a6b6f..cf88233b819a0 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -4332,7 +4332,7 @@ int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
 void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
 			       struct kvm_io_device *dev)
 {
-	int i;
+	int i, j;
 	struct kvm_io_bus *new_bus, *bus;
 
 	bus = kvm_get_bus(kvm, bus_idx);
@@ -4349,17 +4349,20 @@ void kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
 
 	new_bus = kmalloc(struct_size(bus, range, bus->dev_count - 1),
 			  GFP_KERNEL_ACCOUNT);
-	if (!new_bus)  {
+	if (new_bus) {
+		memcpy(new_bus, bus, sizeof(*bus) + i * sizeof(struct kvm_io_range));
+		new_bus->dev_count--;
+		memcpy(new_bus->range + i, bus->range + i + 1,
+		       (new_bus->dev_count - i) * sizeof(struct kvm_io_range));
+	} else {
 		pr_err("kvm: failed to shrink bus, removing it completely\n");
-		goto broken;
+		for (j = 0; j < bus->dev_count; j++) {
+			if (j == i)
+				continue;
+			kvm_iodevice_destructor(bus->range[j].dev);
+		}
 	}
 
-	memcpy(new_bus, bus, sizeof(*bus) + i * sizeof(struct kvm_io_range));
-	new_bus->dev_count--;
-	memcpy(new_bus->range + i, bus->range + i + 1,
-	       (new_bus->dev_count - i) * sizeof(struct kvm_io_range));
-
-broken:
 	rcu_assign_pointer(kvm->buses[bus_idx], new_bus);
 	synchronize_srcu_expedited(&kvm->srcu);
 	kfree(bus);
-- 
GitLab


From c6b177a3beb9140dc0ba05b61c5142fcec5f2bf7 Mon Sep 17 00:00:00 2001
From: Chenyi Qiang <chenyi.qiang@intel.com>
Date: Fri, 28 Aug 2020 16:56:21 +0800
Subject: [PATCH 1177/1341] KVM: nVMX: Fix the update value of nested load
 IA32_PERF_GLOBAL_CTRL control

A minor fix for the update of VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL field
in exit_ctls_high.

Fixes: 03a8871add95 ("KVM: nVMX: Expose load IA32_PERF_GLOBAL_CTRL
VM-{Entry,Exit} control")
Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20200828085622.8365-5-chenyi.qiang@intel.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/vmx/nested.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index d7482ccf6a8de..1bb6b31eb6466 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -4676,7 +4676,7 @@ void nested_vmx_pmu_entry_exit_ctls_update(struct kvm_vcpu *vcpu)
 		vmx->nested.msrs.entry_ctls_high &=
 				~VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
 		vmx->nested.msrs.exit_ctls_high &=
-				~VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
+				~VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL;
 	}
 }
 
-- 
GitLab


From f6f6195b888c28a0b59ceb0562daff92a2be86c3 Mon Sep 17 00:00:00 2001
From: Lai Jiangshan <laijs@linux.alibaba.com>
Date: Wed, 2 Sep 2020 21:54:21 +0800
Subject: [PATCH 1178/1341] kvm x86/mmu: use KVM_REQ_MMU_SYNC to sync when
 needed

When kvm_mmu_get_page() gets a page with unsynced children, the spt
pagetable is unsynchronized with the guest pagetable. But the
guest might not issue a "flush" operation on it when the pagetable
entry is changed from zero or other cases. The hypervisor has the
responsibility to synchronize the pagetables.

KVM behaved as above for many years, But commit 8c8560b83390
("KVM: x86/mmu: Use KVM_REQ_TLB_FLUSH_CURRENT for MMU specific flushes")
inadvertently included a line of code to change it without giving any
reason in the changelog. It is clear that the commit's intention was to
change KVM_REQ_TLB_FLUSH -> KVM_REQ_TLB_FLUSH_CURRENT, so we don't
needlessly flush other contexts; however, one of the hunks changed
a nearby KVM_REQ_MMU_SYNC instead.  This patch changes it back.

Link: https://lore.kernel.org/lkml/20200320212833.3507-26-sean.j.christopherson@intel.com/
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20200902135421.31158-1-jiangshanlai@gmail.com>
fixes: 8c8560b83390 ("KVM: x86/mmu: Use KVM_REQ_TLB_FLUSH_CURRENT for MMU specific flushes")
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/mmu/mmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index a5d0207e71897..76c5826e29a20 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -2469,7 +2469,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
 		}
 
 		if (sp->unsync_children)
-			kvm_make_request(KVM_REQ_TLB_FLUSH_CURRENT, vcpu);
+			kvm_make_request(KVM_REQ_MMU_SYNC, vcpu);
 
 		__clear_sp_write_flooding_count(sp);
 
-- 
GitLab


From 15e9e35cd1dec2bc138464de6bf8ef828df19235 Mon Sep 17 00:00:00 2001
From: Huacai Chen <chenhc@lemote.com>
Date: Thu, 10 Sep 2020 18:33:51 +0800
Subject: [PATCH 1179/1341] KVM: MIPS: Change the definition of kvm type

MIPS defines two kvm types:

 #define KVM_VM_MIPS_TE          0
 #define KVM_VM_MIPS_VZ          1

In Documentation/virt/kvm/api.rst it is said that "You probably want to
use 0 as machine type", which implies that type 0 be the "automatic" or
"default" type. And, in user-space libvirt use the null-machine (with
type 0) to detect the kvm capability, which returns "KVM not supported"
on a VZ platform.

I try to fix it in QEMU but it is ugly:
https://lists.nongnu.org/archive/html/qemu-devel/2020-08/msg05629.html

And Thomas Huth suggests me to change the definition of kvm type:
https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg03281.html

So I define like this:

 #define KVM_VM_MIPS_AUTO        0
 #define KVM_VM_MIPS_VZ          1
 #define KVM_VM_MIPS_TE          2

Since VZ and TE cannot co-exists, using type 0 on a TE platform will
still return success (so old user-space tools have no problems on new
kernels); the advantage is that using type 0 on a VZ platform will not
return failure. So, the only problem is "new user-space tools use type
2 on old kernels", but if we treat this as a kernel bug, we can backport
this patch to old stable kernels.

Signed-off-by: Huacai Chen <chenhc@lemote.com>
Message-Id: <1599734031-28746-1-git-send-email-chenhc@lemote.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/mips/kvm/mips.c     | 2 ++
 include/uapi/linux/kvm.h | 5 +++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index 7de85d2253ff5..0c50ac4442221 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -137,6 +137,8 @@ extern void kvm_init_loongson_ipi(struct kvm *kvm);
 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 {
 	switch (type) {
+	case KVM_VM_MIPS_AUTO:
+		break;
 #ifdef CONFIG_KVM_MIPS_VZ
 	case KVM_VM_MIPS_VZ:
 #else
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 3d8023474f2a6..7d8eced6f459b 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -790,9 +790,10 @@ struct kvm_ppc_resize_hpt {
 #define KVM_VM_PPC_HV 1
 #define KVM_VM_PPC_PR 2
 
-/* on MIPS, 0 forces trap & emulate, 1 forces VZ ASE */
-#define KVM_VM_MIPS_TE		0
+/* on MIPS, 0 indicates auto, 1 forces VZ ASE, 2 forces trap & emulate */
+#define KVM_VM_MIPS_AUTO	0
 #define KVM_VM_MIPS_VZ		1
+#define KVM_VM_MIPS_TE		2
 
 #define KVM_S390_SIE_PAGE_OFFSET 1
 
-- 
GitLab


From 7be74942f184fdfba34ddd19a0d995deb34d4a03 Mon Sep 17 00:00:00 2001
From: David Rientjes <rientjes@google.com>
Date: Tue, 25 Aug 2020 12:56:28 -0700
Subject: [PATCH 1180/1341] KVM: SVM: Periodically schedule when unregistering
 regions on destroy

There may be many encrypted regions that need to be unregistered when a
SEV VM is destroyed.  This can lead to soft lockups.  For example, on a
host running 4.15:

watchdog: BUG: soft lockup - CPU#206 stuck for 11s! [t_virtual_machi:194348]
CPU: 206 PID: 194348 Comm: t_virtual_machi
RIP: 0010:free_unref_page_list+0x105/0x170
...
Call Trace:
 [<0>] release_pages+0x159/0x3d0
 [<0>] sev_unpin_memory+0x2c/0x50 [kvm_amd]
 [<0>] __unregister_enc_region_locked+0x2f/0x70 [kvm_amd]
 [<0>] svm_vm_destroy+0xa9/0x200 [kvm_amd]
 [<0>] kvm_arch_destroy_vm+0x47/0x200
 [<0>] kvm_put_kvm+0x1a8/0x2f0
 [<0>] kvm_vm_release+0x25/0x30
 [<0>] do_exit+0x335/0xc10
 [<0>] do_group_exit+0x3f/0xa0
 [<0>] get_signal+0x1bc/0x670
 [<0>] do_signal+0x31/0x130

Although the CLFLUSH is no longer issued on every encrypted region to be
unregistered, there are no other changes that can prevent soft lockups for
very large SEV VMs in the latest kernel.

Periodically schedule if necessary.  This still holds kvm->lock across the
resched, but since this only happens when the VM is destroyed this is
assumed to be acceptable.

Signed-off-by: David Rientjes <rientjes@google.com>
Message-Id: <alpine.DEB.2.23.453.2008251255240.2987727@chino.kir.corp.google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/svm/sev.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 402dc4234e397..7bf7bf7349794 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -1106,6 +1106,7 @@ void sev_vm_destroy(struct kvm *kvm)
 		list_for_each_safe(pos, q, head) {
 			__unregister_enc_region_locked(kvm,
 				list_entry(pos, struct enc_region, list));
+			cond_resched();
 		}
 	}
 
-- 
GitLab


From d831de177217cd494bfb99f2c849a0d40c2a7890 Mon Sep 17 00:00:00 2001
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Fri, 11 Sep 2020 11:31:47 +0200
Subject: [PATCH 1181/1341] KVM: x86: always allow writing '0' to
 MSR_KVM_ASYNC_PF_EN

Even without in-kernel LAPIC we should allow writing '0' to
MSR_KVM_ASYNC_PF_EN as we're not enabling the mechanism. In
particular, QEMU with 'kernel-irqchip=off' fails to start
a guest with

qemu-system-x86_64: error: failed to set MSR 0x4b564d02 to 0x0

Fixes: 9d3c447c72fb2 ("KVM: X86: Fix async pf caused null-ptr-deref")
Reported-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200911093147.484565-1-vkuznets@redhat.com>
[Actually commit the version proposed by Sean Christopherson. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/x86.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 432ef34b9ea91..e3de0fe5af377 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2735,7 +2735,7 @@ static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data)
 		return 1;
 
 	if (!lapic_in_kernel(vcpu))
-		return 1;
+		return data ? 1 : 0;
 
 	vcpu->arch.apf.msr_en_val = data;
 
-- 
GitLab


From 66d18dbda8469a944dfec6c49d26d5946efba218 Mon Sep 17 00:00:00 2001
From: Palmer Dabbelt <palmerdabbelt@google.com>
Date: Mon, 24 Aug 2020 17:21:22 -0700
Subject: [PATCH 1182/1341] RISC-V: Take text_mutex in ftrace_init_nop()

Without this we get lockdep failures.  They're spurious failures as SMP isn't
up when ftrace_init_nop() is called.  As far as I can tell the easiest fix is
to just take the lock, which also seems like the safest fix.

Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Acked-by: Guo Ren <guoren@kernel.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/include/asm/ftrace.h |  7 +++++++
 arch/riscv/kernel/ftrace.c      | 19 +++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/arch/riscv/include/asm/ftrace.h b/arch/riscv/include/asm/ftrace.h
index ace8a6e2d11d3..845002cc2e571 100644
--- a/arch/riscv/include/asm/ftrace.h
+++ b/arch/riscv/include/asm/ftrace.h
@@ -66,6 +66,13 @@ do {									\
  * Let auipc+jalr be the basic *mcount unit*, so we make it 8 bytes here.
  */
 #define MCOUNT_INSN_SIZE 8
+
+#ifndef __ASSEMBLY__
+struct dyn_ftrace;
+int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec);
+#define ftrace_init_nop ftrace_init_nop
+#endif
+
 #endif
 
 #endif /* _ASM_RISCV_FTRACE_H */
diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c
index 2ff63d0cbb500..99e12faa54986 100644
--- a/arch/riscv/kernel/ftrace.c
+++ b/arch/riscv/kernel/ftrace.c
@@ -97,6 +97,25 @@ int ftrace_make_nop(struct module *mod, struct dyn_ftrace *rec,
 	return __ftrace_modify_call(rec->ip, addr, false);
 }
 
+
+/*
+ * This is called early on, and isn't wrapped by
+ * ftrace_arch_code_modify_{prepare,post_process}() and therefor doesn't hold
+ * text_mutex, which triggers a lockdep failure.  SMP isn't running so we could
+ * just directly poke the text, but it's simpler to just take the lock
+ * ourselves.
+ */
+int ftrace_init_nop(struct module *mod, struct dyn_ftrace *rec)
+{
+	int out;
+
+	ftrace_arch_code_modify_prepare();
+	out = ftrace_make_nop(mod, rec, MCOUNT_ADDR);
+	ftrace_arch_code_modify_post_process();
+
+	return out;
+}
+
 int ftrace_update_ftrace_func(ftrace_func_t func)
 {
 	int ret = __ftrace_modify_call((unsigned long)&ftrace_call,
-- 
GitLab


From e42c68281b444f9a20d72a062f8c6fd0d31e4de8 Mon Sep 17 00:00:00 2001
From: Wanpeng Li <kernellwpQ@gmail.com>
Date: Sat, 12 Sep 2020 02:16:39 -0400
Subject: [PATCH 1183/1341] KVM: SVM: avoid emulation with stale next_rip

svm->next_rip is reset in svm_vcpu_run() only after calling
svm_exit_handlers_fastpath(), which will cause SVM's
skip_emulated_instruction() to write a stale RIP.

We can move svm_exit_handlers_fastpath towards the end of
svm_vcpu_run().  To align VMX with SVM, keep svm_complete_interrupts()
close as well.

Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Paul K. <kronenpj@kronenpj.dyndns.org>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
[Also move vmcb_mark_all_clean before any possible write to the VMCB.
 - Paolo]
---
 arch/x86/kvm/svm/svm.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 03dd7bac80348..8ba4a32843fa3 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2938,8 +2938,6 @@ static int handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath)
 	if (npt_enabled)
 		vcpu->arch.cr3 = svm->vmcb->save.cr3;
 
-	svm_complete_interrupts(svm);
-
 	if (is_guest_mode(vcpu)) {
 		int vmexit;
 
@@ -3504,7 +3502,6 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
 	stgi();
 
 	/* Any pending NMI will happen here */
-	exit_fastpath = svm_exit_handlers_fastpath(vcpu);
 
 	if (unlikely(svm->vmcb->control.exit_code == SVM_EXIT_NMI))
 		kvm_after_interrupt(&svm->vcpu);
@@ -3518,6 +3515,7 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
 	}
 
 	svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
+	vmcb_mark_all_clean(svm->vmcb);
 
 	/* if exit due to PF check for async PF */
 	if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
@@ -3537,7 +3535,8 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
 		     SVM_EXIT_EXCP_BASE + MC_VECTOR))
 		svm_handle_mce(svm);
 
-	vmcb_mark_all_clean(svm->vmcb);
+	svm_complete_interrupts(svm);
+	exit_fastpath = svm_exit_handlers_fastpath(vcpu);
 	return exit_fastpath;
 }
 
-- 
GitLab


From 99b82a1437cb31340dbb2c437a2923b9814a7b15 Mon Sep 17 00:00:00 2001
From: Wanpeng Li <wanpengli@tencent.com>
Date: Wed, 19 Aug 2020 16:55:27 +0800
Subject: [PATCH 1184/1341] KVM: VMX: Don't freeze guest when event delivery
 causes an APIC-access exit

According to SDM 27.2.4, Event delivery causes an APIC-access VM exit.
Don't report internal error and freeze guest when event delivery causes
an APIC-access exit, it is handleable and the event will be re-injected
during the next vmentry.

Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1597827327-25055-2-git-send-email-wanpengli@tencent.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/vmx/vmx.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 19a599bebd5cf..75cd720c9e8c3 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6054,6 +6054,7 @@ static int vmx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath)
 			(exit_reason != EXIT_REASON_EXCEPTION_NMI &&
 			exit_reason != EXIT_REASON_EPT_VIOLATION &&
 			exit_reason != EXIT_REASON_PML_FULL &&
+			exit_reason != EXIT_REASON_APIC_ACCESS &&
 			exit_reason != EXIT_REASON_TASK_SWITCH)) {
 		vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
 		vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV;
-- 
GitLab


From 244081f9073fe934adbcb2db6496b91b8fc51655 Mon Sep 17 00:00:00 2001
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Tue, 8 Sep 2020 15:53:49 +0200
Subject: [PATCH 1185/1341] x86/kvm: properly use DEFINE_IDTENTRY_SYSVEC()
 macro

DEFINE_IDTENTRY_SYSVEC() already contains irqentry_enter()/
irqentry_exit().

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200908135350.355053-2-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kernel/kvm.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 9e7dd3a96873e..02d15485ff1d0 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -270,9 +270,6 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_asyncpf_interrupt)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
 	u32 token;
-	irqentry_state_t state;
-
-	state = irqentry_enter(regs);
 
 	inc_irq_stat(irq_hv_callback_count);
 
@@ -283,7 +280,6 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_asyncpf_interrupt)
 		wrmsrl(MSR_KVM_ASYNC_PF_ACK, 1);
 	}
 
-	irqentry_exit(regs, state);
 	set_irq_regs(old_regs);
 }
 
-- 
GitLab


From cc17b22559d9b9c8b7540810df172f3d7af901ce Mon Sep 17 00:00:00 2001
From: Vitaly Kuznetsov <vkuznets@redhat.com>
Date: Tue, 8 Sep 2020 15:53:50 +0200
Subject: [PATCH 1186/1341] x86/kvm: don't forget to ACK async PF IRQ

Merge commit 26d05b368a5c0 ("Merge branch 'kvm-async-pf-int' into HEAD")
tried to adapt the new interrupt based async PF mechanism to the newly
introduced IDTENTRY magic but unfortunately it missed the fact that
DEFINE_IDTENTRY_SYSVEC() doesn't call ack_APIC_irq() on its own and
all DEFINE_IDTENTRY_SYSVEC() users have to call it manually.

As the result all multi-CPU KVM guest hang on boot when
KVM_FEATURE_ASYNC_PF_INT is present. The breakage went unnoticed because no
KVM userspace (e.g. QEMU) currently set it (and thus async PF mechanism
is currently disabled) but we're about to change that.

Fixes: 26d05b368a5c0 ("Merge branch 'kvm-async-pf-int' into HEAD")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20200908135350.355053-3-vkuznets@redhat.com>
Tested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kernel/kvm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 02d15485ff1d0..1b51b727b1405 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -271,6 +271,8 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_asyncpf_interrupt)
 	struct pt_regs *old_regs = set_irq_regs(regs);
 	u32 token;
 
+	ack_APIC_irq();
+
 	inc_irq_stat(irq_hv_callback_count);
 
 	if (__this_cpu_read(apf_reason.enabled)) {
-- 
GitLab


From d877322bc1adcab9850732275670409e8bcca4c4 Mon Sep 17 00:00:00 2001
From: Stafford Horne <shorne@gmail.com>
Date: Thu, 3 Sep 2020 05:54:40 +0900
Subject: [PATCH 1187/1341] openrisc: Fix issue with get_user for 64-bit values

A build failure was raised by kbuild with the following error.

    drivers/android/binder.c: Assembler messages:
    drivers/android/binder.c:3861: Error: unrecognized keyword/register name `l.lwz ?ap,4(r24)'
    drivers/android/binder.c:3866: Error: unrecognized keyword/register name `l.addi ?ap,r0,0'

The issue is with 64-bit get_user() calls on openrisc.  I traced this to
a problem where in the internally in the get_user macros there is a cast
to long __gu_val this causes GCC to think the get_user call is 32-bit.
This binder code is really long and GCC allocates register r30, which
triggers the issue. The 64-bit get_user asm tries to get the 64-bit pair
register, which for r30 overflows the general register names and returns
the dummy register ?ap.

The fix here is to move the temporary variables into the asm macros.  We
use a 32-bit __gu_tmp for 32-bit and smaller macro and a 64-bit tmp in
the 64-bit macro.  The cast in the 64-bit macro has a trick of casting
through __typeof__((x)-(x)) which avoids the below warning.  This was
barrowed from riscv.

    arch/openrisc/include/asm/uaccess.h:240:8: warning: cast to pointer from integer of different size

I tested this in a small unit test to check reading between 64-bit and
32-bit pointers to 64-bit and 32-bit values in all combinations.  Also I
ran make C=1 to confirm no new sparse warnings came up.  It all looks
clean to me.

Link: https://lore.kernel.org/lkml/202008200453.ohnhqkjQ%25lkp@intel.com/
Signed-off-by: Stafford Horne <shorne@gmail.com>
Reviewed-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 arch/openrisc/include/asm/uaccess.h | 33 ++++++++++++++++++-----------
 1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/arch/openrisc/include/asm/uaccess.h b/arch/openrisc/include/asm/uaccess.h
index f0390211236bf..120f5005461b8 100644
--- a/arch/openrisc/include/asm/uaccess.h
+++ b/arch/openrisc/include/asm/uaccess.h
@@ -165,19 +165,19 @@ struct __large_struct {
 
 #define __get_user_nocheck(x, ptr, size)			\
 ({								\
-	long __gu_err, __gu_val;				\
-	__get_user_size(__gu_val, (ptr), (size), __gu_err);	\
-	(x) = (__force __typeof__(*(ptr)))__gu_val;		\
+	long __gu_err;						\
+	__get_user_size((x), (ptr), (size), __gu_err);		\
 	__gu_err;						\
 })
 
 #define __get_user_check(x, ptr, size)					\
 ({									\
-	long __gu_err = -EFAULT, __gu_val = 0;				\
+	long __gu_err = -EFAULT;					\
 	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
-	if (access_ok(__gu_addr, size))			\
-		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
-	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
+	if (access_ok(__gu_addr, size))					\
+		__get_user_size((x), __gu_addr, (size), __gu_err);	\
+	else								\
+		(x) = (__typeof__(*(ptr))) 0;				\
 	__gu_err;							\
 })
 
@@ -191,11 +191,13 @@ do {									\
 	case 2: __get_user_asm(x, ptr, retval, "l.lhz"); break;		\
 	case 4: __get_user_asm(x, ptr, retval, "l.lwz"); break;		\
 	case 8: __get_user_asm2(x, ptr, retval); break;			\
-	default: (x) = __get_user_bad();				\
+	default: (x) = (__typeof__(*(ptr)))__get_user_bad();		\
 	}								\
 } while (0)
 
 #define __get_user_asm(x, addr, err, op)		\
+{							\
+	unsigned long __gu_tmp;				\
 	__asm__ __volatile__(				\
 		"1:	"op" %1,0(%2)\n"		\
 		"2:\n"					\
@@ -209,10 +211,14 @@ do {									\
 		"	.align 2\n"			\
 		"	.long 1b,3b\n"			\
 		".previous"				\
-		: "=r"(err), "=r"(x)			\
-		: "r"(addr), "i"(-EFAULT), "0"(err))
+		: "=r"(err), "=r"(__gu_tmp)		\
+		: "r"(addr), "i"(-EFAULT), "0"(err));	\
+	(x) = (__typeof__(*(addr)))__gu_tmp;		\
+}
 
 #define __get_user_asm2(x, addr, err)			\
+{							\
+	unsigned long long __gu_tmp;			\
 	__asm__ __volatile__(				\
 		"1:	l.lwz %1,0(%2)\n"		\
 		"2:	l.lwz %H1,4(%2)\n"		\
@@ -229,8 +235,11 @@ do {									\
 		"	.long 1b,4b\n"			\
 		"	.long 2b,4b\n"			\
 		".previous"				\
-		: "=r"(err), "=&r"(x)			\
-		: "r"(addr), "i"(-EFAULT), "0"(err))
+		: "=r"(err), "=&r"(__gu_tmp)		\
+		: "r"(addr), "i"(-EFAULT), "0"(err));	\
+	(x) = (__typeof__(*(addr)))(			\
+		(__typeof__((x)-(x)))__gu_tmp);		\
+}
 
 /* more complex routines */
 
-- 
GitLab


From 9883764ad0ce037c554ac0ef302dcf671f8d1ccb Mon Sep 17 00:00:00 2001
From: Maxim Levitsky <mlevitsk@redhat.com>
Date: Thu, 27 Aug 2020 19:27:18 +0300
Subject: [PATCH 1188/1341] SVM: nSVM: correctly restore GIF on vmexit from
 nesting after migration

Currently code in svm_set_nested_state copies the current vmcb control
area to L1 control area (hsave->control), under assumption that
it mostly reflects the defaults that kvm choose, and later qemu
overrides  these defaults with L2 state using standard KVM interfaces,
like KVM_SET_REGS.

However nested GIF (which is AMD specific thing) is by default is true,
and it is copied to hsave area as such.

This alone is not a big deal since on VMexit, GIF is always set to false,
regardless of what it was on VM entry.  However in nested_svm_vmexit we
were first were setting GIF to false, but then we overwrite the control
fields with value from the hsave area.  (including the nested GIF field
itself if GIF virtualization is enabled).

Now on normal vm entry this is not a problem, since GIF is usually false
prior to normal vm entry, and this is the value that copied to hsave,
and then restored, but this is not always the case when the nested state
is loaded as explained above.

To fix this issue, move svm_set_gif after we restore the L1 control
state in nested_svm_vmexit, so that even with wrong GIF in the
saved L1 control area, we still clear GIF as the spec says.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200827162720.278690-2-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/svm/nested.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index fb68467e60496..95fdf068fe4c1 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -586,7 +586,6 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
 	svm->vcpu.arch.mp_state = KVM_MP_STATE_RUNNABLE;
 
 	/* Give the current vmcb to the guest */
-	svm_set_gif(svm, false);
 
 	nested_vmcb->save.es     = vmcb->save.es;
 	nested_vmcb->save.cs     = vmcb->save.cs;
@@ -632,6 +631,9 @@ int nested_svm_vmexit(struct vcpu_svm *svm)
 	/* Restore the original control entries */
 	copy_vmcb_control_area(&vmcb->control, &hsave->control);
 
+	/* On vmexit the  GIF is set to false */
+	svm_set_gif(svm, false);
+
 	svm->vmcb->control.tsc_offset = svm->vcpu.arch.tsc_offset =
 		svm->vcpu.arch.l1_tsc_offset;
 
-- 
GitLab


From 772b81bb2f9b191a046ba7bba1f232eb7b109b84 Mon Sep 17 00:00:00 2001
From: Maxim Levitsky <mlevitsk@redhat.com>
Date: Thu, 27 Aug 2020 19:27:19 +0300
Subject: [PATCH 1189/1341] SVM: nSVM: setup nested msr permission bitmap on
 nested state load

This code was missing and was forcing the L2 run with L1's msr
permission bitmap

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200827162720.278690-3-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/svm/nested.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c
index 95fdf068fe4c1..e90bc436f5849 100644
--- a/arch/x86/kvm/svm/nested.c
+++ b/arch/x86/kvm/svm/nested.c
@@ -1134,6 +1134,9 @@ static int svm_set_nested_state(struct kvm_vcpu *vcpu,
 	load_nested_vmcb_control(svm, &ctl);
 	nested_prepare_vmcb_control(svm);
 
+	if (!nested_svm_vmrun_msrpm(svm))
+		return -EINVAL;
+
 out_set_gif:
 	svm_set_gif(svm, !!(kvm_state->flags & KVM_STATE_NESTED_GIF_SET));
 	return 0;
-- 
GitLab


From 3ebb5d2617fbf45567975f878232178c5b292d58 Mon Sep 17 00:00:00 2001
From: Maxim Levitsky <mlevitsk@redhat.com>
Date: Thu, 27 Aug 2020 19:27:20 +0300
Subject: [PATCH 1190/1341] KVM: nSVM: more strict SMM checks when returning to
 nested guest

* check that guest is 64 bit guest, otherwise the SVM related fields
  in the smm state area are not defined

* If the SMM area indicates that SMM interrupted a running guest,
  check that EFER.SVME which is also saved in this area is set, otherwise
  the guest might have tampered with SMM save area, and so indicate
  emulation failure which should triple fault the guest.

* Check that that guest CPUID supports SVM (due to the same issue as above)

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200827162720.278690-4-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/svm/svm.c | 29 ++++++++++++++++++-----------
 1 file changed, 18 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 8ba4a32843fa3..5764b87379cff 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3899,21 +3899,28 @@ static int svm_pre_enter_smm(struct kvm_vcpu *vcpu, char *smstate)
 static int svm_pre_leave_smm(struct kvm_vcpu *vcpu, const char *smstate)
 {
 	struct vcpu_svm *svm = to_svm(vcpu);
-	struct vmcb *nested_vmcb;
 	struct kvm_host_map map;
-	u64 guest;
-	u64 vmcb;
 	int ret = 0;
 
-	guest = GET_SMSTATE(u64, smstate, 0x7ed8);
-	vmcb = GET_SMSTATE(u64, smstate, 0x7ee0);
+	if (guest_cpuid_has(vcpu, X86_FEATURE_LM)) {
+		u64 saved_efer = GET_SMSTATE(u64, smstate, 0x7ed0);
+		u64 guest = GET_SMSTATE(u64, smstate, 0x7ed8);
+		u64 vmcb = GET_SMSTATE(u64, smstate, 0x7ee0);
 
-	if (guest) {
-		if (kvm_vcpu_map(&svm->vcpu, gpa_to_gfn(vmcb), &map) == -EINVAL)
-			return 1;
-		nested_vmcb = map.hva;
-		ret = enter_svm_guest_mode(svm, vmcb, nested_vmcb);
-		kvm_vcpu_unmap(&svm->vcpu, &map, true);
+		if (guest) {
+			if (!guest_cpuid_has(vcpu, X86_FEATURE_SVM))
+				return 1;
+
+			if (!(saved_efer & EFER_SVME))
+				return 1;
+
+			if (kvm_vcpu_map(&svm->vcpu,
+					 gpa_to_gfn(vmcb), &map) == -EINVAL)
+				return 1;
+
+			ret = enter_svm_guest_mode(svm, vmcb, map.hva);
+			kvm_vcpu_unmap(&svm->vcpu, &map, true);
+		}
 	}
 
 	return ret;
-- 
GitLab


From 37f66bbef0920429b8cb5eddba849ec4308a9f8e Mon Sep 17 00:00:00 2001
From: Maxim Levitsky <mlevitsk@redhat.com>
Date: Thu, 27 Aug 2020 20:11:44 +0300
Subject: [PATCH 1191/1341] KVM: emulator: more strict rsm checks.

Don't ignore return values in rsm_load_state_64/32 to avoid
loading invalid state from SMM state area if it was tampered with
by the guest.

This is primarly intended to avoid letting guest set bits in EFER
(like EFER.SVME when nesting is disabled) by manipulating SMM save area.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20200827171145.374620-8-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 arch/x86/kvm/emulate.c | 22 +++++++++++++++++-----
 1 file changed, 17 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index d0e2825ae6174..1d450d7710d63 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -2505,9 +2505,14 @@ static int rsm_load_state_32(struct x86_emulate_ctxt *ctxt,
 		*reg_write(ctxt, i) = GET_SMSTATE(u32, smstate, 0x7fd0 + i * 4);
 
 	val = GET_SMSTATE(u32, smstate, 0x7fcc);
-	ctxt->ops->set_dr(ctxt, 6, (val & DR6_VOLATILE) | DR6_FIXED_1);
+
+	if (ctxt->ops->set_dr(ctxt, 6, (val & DR6_VOLATILE) | DR6_FIXED_1))
+		return X86EMUL_UNHANDLEABLE;
+
 	val = GET_SMSTATE(u32, smstate, 0x7fc8);
-	ctxt->ops->set_dr(ctxt, 7, (val & DR7_VOLATILE) | DR7_FIXED_1);
+
+	if (ctxt->ops->set_dr(ctxt, 7, (val & DR7_VOLATILE) | DR7_FIXED_1))
+		return X86EMUL_UNHANDLEABLE;
 
 	selector =                 GET_SMSTATE(u32, smstate, 0x7fc4);
 	set_desc_base(&desc,       GET_SMSTATE(u32, smstate, 0x7f64));
@@ -2560,16 +2565,23 @@ static int rsm_load_state_64(struct x86_emulate_ctxt *ctxt,
 	ctxt->eflags = GET_SMSTATE(u32, smstate, 0x7f70) | X86_EFLAGS_FIXED;
 
 	val = GET_SMSTATE(u32, smstate, 0x7f68);
-	ctxt->ops->set_dr(ctxt, 6, (val & DR6_VOLATILE) | DR6_FIXED_1);
+
+	if (ctxt->ops->set_dr(ctxt, 6, (val & DR6_VOLATILE) | DR6_FIXED_1))
+		return X86EMUL_UNHANDLEABLE;
+
 	val = GET_SMSTATE(u32, smstate, 0x7f60);
-	ctxt->ops->set_dr(ctxt, 7, (val & DR7_VOLATILE) | DR7_FIXED_1);
+
+	if (ctxt->ops->set_dr(ctxt, 7, (val & DR7_VOLATILE) | DR7_FIXED_1))
+		return X86EMUL_UNHANDLEABLE;
 
 	cr0 =                       GET_SMSTATE(u64, smstate, 0x7f58);
 	cr3 =                       GET_SMSTATE(u64, smstate, 0x7f50);
 	cr4 =                       GET_SMSTATE(u64, smstate, 0x7f48);
 	ctxt->ops->set_smbase(ctxt, GET_SMSTATE(u32, smstate, 0x7f00));
 	val =                       GET_SMSTATE(u64, smstate, 0x7ed0);
-	ctxt->ops->set_msr(ctxt, MSR_EFER, val & ~EFER_LMA);
+
+	if (ctxt->ops->set_msr(ctxt, MSR_EFER, val & ~EFER_LMA))
+		return X86EMUL_UNHANDLEABLE;
 
 	selector =                  GET_SMSTATE(u32, smstate, 0x7e90);
 	rsm_set_desc_flags(&desc,   GET_SMSTATE(u32, smstate, 0x7e92) << 8);
-- 
GitLab


From ed888cb0d1ebce69f12794e89fbd5e2c86d40b8d Mon Sep 17 00:00:00 2001
From: Marc Zyngier <maz@kernel.org>
Date: Fri, 11 Sep 2020 19:16:11 +0100
Subject: [PATCH 1192/1341] arm64: Allow CPUs unffected by ARM erratum 1418040
 to come in late

Now that we allow CPUs affected by erratum 1418040 to come in late,
this prevents their unaffected sibblings from coming in late (or
coming back after a suspend or hotplug-off, which amounts to the
same thing).

To allow this, we need to add ARM64_CPUCAP_OPTIONAL_FOR_LATE_CPU,
which amounts to set .type to ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE.

Fixes: bf87bb0881d0 ("arm64: Allow booting of late CPUs affected by erratum 1418040")
Reported-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Tested-by: Matthias Kaehlcke <mka@chromium.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200911181611.2073183-1-maz@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/cpu_errata.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index c332d49780dc9..560ba69e13c11 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -910,8 +910,12 @@ const struct arm64_cpu_capabilities arm64_errata[] = {
 		.desc = "ARM erratum 1418040",
 		.capability = ARM64_WORKAROUND_1418040,
 		ERRATA_MIDR_RANGE_LIST(erratum_1418040_list),
-		.type = (ARM64_CPUCAP_SCOPE_LOCAL_CPU |
-			 ARM64_CPUCAP_PERMITTED_FOR_LATE_CPU),
+		/*
+		 * We need to allow affected CPUs to come in late, but
+		 * also need the non-affected CPUs to be able to come
+		 * in at any point in time. Wonderful.
+		 */
+		.type = ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE,
 	},
 #endif
 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT
-- 
GitLab


From 856deb866d16e29bd65952e0289066f6078af773 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 13 Sep 2020 16:06:00 -0700
Subject: [PATCH 1193/1341] Linux 5.9-rc5

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 2b1061ec98ed0..19d012810fbbc 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 VERSION = 5
 PATCHLEVEL = 9
 SUBLEVEL = 0
-EXTRAVERSION = -rc4
+EXTRAVERSION = -rc5
 NAME = Kleptomaniac Octopus
 
 # *DOCUMENTATION*
-- 
GitLab


From ca6345de57a46ba1bd35bd15b0ceb42e05b3d71f Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@libc.org>
Date: Wed, 2 Sep 2020 13:40:17 -0400
Subject: [PATCH 1194/1341] sh: remove spurious circular inclusion from
 asm/smp.h

Commit 0cd39f4600ed4de8 added inclusion of smp.h to lockdep.h,
creating a circular include dependency where arch/sh's asm/smp.h in
turn includes spinlock.h which depends on lockdep.h. Since our
asm/smp.h does not actually need spinlock.h, just remove it.

Fixes: 0cd39f4600ed4de8 ("locking/seqlock, headers: Untangle the spaghetti monster")
Tested-by: Rob Landley <rob@landley.net>
Signed-off-by: Rich Felker <dalias@libc.org>
---
 arch/sh/include/asm/smp.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/sh/include/asm/smp.h b/arch/sh/include/asm/smp.h
index 1a0d7cf71c102..100bf241340b9 100644
--- a/arch/sh/include/asm/smp.h
+++ b/arch/sh/include/asm/smp.h
@@ -8,7 +8,6 @@
 
 #ifdef CONFIG_SMP
 
-#include <linux/spinlock.h>
 #include <linux/atomic.h>
 #include <asm/current.h>
 #include <asm/percpu.h>
-- 
GitLab


From b0cfc315ff38c423a5ce9ce159bd5baa4135e688 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@libc.org>
Date: Fri, 28 Aug 2020 21:01:41 -0400
Subject: [PATCH 1195/1341] sh: fix syscall tracing

Addition of SECCOMP_FILTER exposed a longstanding bug in
do_syscall_trace_enter, whereby r0 (the 5th argument register) was
mistakenly used where r3 (syscall_nr) was intended. By overwriting r0
rather than r3 with -1 when attempting to block a syscall, the
existing code would instead have caused the syscall to execute with an
argument clobbered.

Commit 0bb605c2c7f2b4b3 then introduced skipping of the syscall when
do_syscall_trace_enter returns -1, so that the return value set by
seccomp filters would not be clobbered by -ENOSYS. This eliminated the
clobbering of the 5th argument register, but instead caused syscalls
made with a 5th argument of -1 to be misinterpreted as a request by
do_syscall_trace_enter to suppress the syscall.

Fixes: 0bb605c2c7f2b4b3 ("sh: Add SECCOMP_FILTER")
Fixes: ab99c733ae73cce3 ("sh: Make syscall tracer use tracehook notifiers, add TIF_NOTIFY_RESUME.")
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Rich Felker <dalias@libc.org>
---
 arch/sh/kernel/entry-common.S |  1 -
 arch/sh/kernel/ptrace_32.c    | 15 +++++----------
 2 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/arch/sh/kernel/entry-common.S b/arch/sh/kernel/entry-common.S
index ad963104d22d4..91ab2607a1ff9 100644
--- a/arch/sh/kernel/entry-common.S
+++ b/arch/sh/kernel/entry-common.S
@@ -370,7 +370,6 @@ syscall_trace_entry:
 	 nop
 	cmp/eq	#-1, r0
 	bt	syscall_exit
-	mov.l	r0, @(OFF_R0,r15)	! Save return value
 	!			Reload R0-R4 from kernel stack, where the
 	!   	    	    	parent may have modified them using
 	!   	    	    	ptrace(POKEUSR).  (Note that R0-R2 are
diff --git a/arch/sh/kernel/ptrace_32.c b/arch/sh/kernel/ptrace_32.c
index b05bf92f9c325..5281685f6ad1f 100644
--- a/arch/sh/kernel/ptrace_32.c
+++ b/arch/sh/kernel/ptrace_32.c
@@ -455,16 +455,11 @@ long arch_ptrace(struct task_struct *child, long request,
 
 asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
 {
-	long ret = 0;
-
 	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
-	    tracehook_report_syscall_entry(regs))
-		/*
-		 * Tracing decided this syscall should not happen.
-		 * We'll return a bogus call number to get an ENOSYS
-		 * error, but leave the original number in regs->regs[0].
-		 */
-		ret = -1L;
+	    tracehook_report_syscall_entry(regs)) {
+		regs->regs[0] = -ENOSYS;
+		return -1;
+	}
 
 	if (secure_computing() == -1)
 		return -1;
@@ -475,7 +470,7 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
 	audit_syscall_entry(regs->regs[3], regs->regs[4], regs->regs[5],
 			    regs->regs[6], regs->regs[7]);
 
-	return ret ?: regs->regs[0];
+	return 0;
 }
 
 asmlinkage void do_syscall_trace_leave(struct pt_regs *regs)
-- 
GitLab


From 1a1d6db23ddacde0b15ea589e9103373e05af8de Mon Sep 17 00:00:00 2001
From: Eddie James <eajames@linux.ibm.com>
Date: Wed, 9 Sep 2020 15:30:57 -0500
Subject: [PATCH 1196/1341] i2c: aspeed: Mask IRQ status to relevant bits

Mask the IRQ status to only the bits that the driver checks. This
prevents excessive driver warnings when operating in slave mode
when additional bits are set that the driver doesn't handle.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Tao Ren <rentao.bupt@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/busses/i2c-aspeed.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/i2c/busses/i2c-aspeed.c b/drivers/i2c/busses/i2c-aspeed.c
index 31268074c4221..724bf30600d60 100644
--- a/drivers/i2c/busses/i2c-aspeed.c
+++ b/drivers/i2c/busses/i2c-aspeed.c
@@ -69,6 +69,7 @@
  * These share bit definitions, so use the same values for the enable &
  * status bits.
  */
+#define ASPEED_I2CD_INTR_RECV_MASK			0xf000ffff
 #define ASPEED_I2CD_INTR_SDA_DL_TIMEOUT			BIT(14)
 #define ASPEED_I2CD_INTR_BUS_RECOVER_DONE		BIT(13)
 #define ASPEED_I2CD_INTR_SLAVE_MATCH			BIT(7)
@@ -604,6 +605,7 @@ static irqreturn_t aspeed_i2c_bus_irq(int irq, void *dev_id)
 	writel(irq_received & ~ASPEED_I2CD_INTR_RX_DONE,
 	       bus->base + ASPEED_I2C_INTR_STS_REG);
 	readl(bus->base + ASPEED_I2C_INTR_STS_REG);
+	irq_received &= ASPEED_I2CD_INTR_RECV_MASK;
 	irq_remaining = irq_received;
 
 #if IS_ENABLED(CONFIG_I2C_SLAVE)
-- 
GitLab


From 66d402e2e9455cf0213c42b97f22a0493372d7cc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Volker=20R=C3=BCmelin?= <vr_qemu@t-online.de>
Date: Tue, 1 Sep 2020 15:22:21 +0200
Subject: [PATCH 1197/1341] i2c: i801: Fix resume bug
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

On suspend the original host configuration gets restored. The
resume routine has to undo this, otherwise the SMBus master
may be left in disabled state or in i2c mode.

[JD: Rebased on v5.8, moved the write into i801_setup_hstcfg.]

Signed-off-by: Volker Rümelin <vr_qemu@t-online.de>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Cc: stable@vger.kernel.org
---
 drivers/i2c/busses/i2c-i801.c | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index e32ef3f01fe8b..22597fa415f1d 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1709,6 +1709,16 @@ static inline int i801_acpi_probe(struct i801_priv *priv) { return 0; }
 static inline void i801_acpi_remove(struct i801_priv *priv) { }
 #endif
 
+static unsigned char i801_setup_hstcfg(struct i801_priv *priv)
+{
+	unsigned char hstcfg = priv->original_hstcfg;
+
+	hstcfg &= ~SMBHSTCFG_I2C_EN;	/* SMBus timing */
+	hstcfg |= SMBHSTCFG_HST_EN;
+	pci_write_config_byte(priv->pci_dev, SMBHSTCFG, hstcfg);
+	return hstcfg;
+}
+
 static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	unsigned char temp;
@@ -1830,14 +1840,10 @@ static int i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
 		return err;
 	}
 
-	pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &temp);
-	priv->original_hstcfg = temp;
-	temp &= ~SMBHSTCFG_I2C_EN;	/* SMBus timing */
-	if (!(temp & SMBHSTCFG_HST_EN)) {
+	pci_read_config_byte(priv->pci_dev, SMBHSTCFG, &priv->original_hstcfg);
+	temp = i801_setup_hstcfg(priv);
+	if (!(priv->original_hstcfg & SMBHSTCFG_HST_EN))
 		dev_info(&dev->dev, "Enabling SMBus device\n");
-		temp |= SMBHSTCFG_HST_EN;
-	}
-	pci_write_config_byte(priv->pci_dev, SMBHSTCFG, temp);
 
 	if (temp & SMBHSTCFG_SMB_SMI_EN) {
 		dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n");
@@ -1963,6 +1969,7 @@ static int i801_resume(struct device *dev)
 {
 	struct i801_priv *priv = dev_get_drvdata(dev);
 
+	i801_setup_hstcfg(priv);
 	i801_enable_host_notify(&priv->adapter);
 
 	return 0;
-- 
GitLab


From 811a6e18a8633ef66c6c9bad09f359dd9daa9ec1 Mon Sep 17 00:00:00 2001
From: Jean Delvare <jdelvare@suse.de>
Date: Tue, 1 Sep 2020 15:28:37 +0200
Subject: [PATCH 1198/1341] i2c: i801: Simplify the suspend callback

We don't actually need to derive the PCI device from the device
structure, as we already have a pointer to it in our private data
structure.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/busses/i2c-i801.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 22597fa415f1d..ebb4c0b03057d 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -1958,10 +1958,9 @@ static void i801_shutdown(struct pci_dev *dev)
 #ifdef CONFIG_PM_SLEEP
 static int i801_suspend(struct device *dev)
 {
-	struct pci_dev *pci_dev = to_pci_dev(dev);
-	struct i801_priv *priv = pci_get_drvdata(pci_dev);
+	struct i801_priv *priv = dev_get_drvdata(dev);
 
-	pci_write_config_byte(pci_dev, SMBHSTCFG, priv->original_hstcfg);
+	pci_write_config_byte(priv->pci_dev, SMBHSTCFG, priv->original_hstcfg);
 	return 0;
 }
 
-- 
GitLab


From ca589ea8d1b64938329c016a5c07fc2eea985712 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Tue, 8 Sep 2020 15:30:31 +0200
Subject: [PATCH 1199/1341] s390/idle: fix suspicious RCU usage

After commit eb1f00237aca ("lockdep,trace: Expose tracepoints") the
lock tracepoints are visible to lockdep and RCU-lockdep is finding a
bunch more RCU violations that were previously hidden.

Switch the idle->seqcount over to using raw_write_*() to avoid the
lockdep annotation and thus the lock tracepoints.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 arch/s390/kernel/idle.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/arch/s390/kernel/idle.c b/arch/s390/kernel/idle.c
index c73f50649e7e4..f7f1e64e0d980 100644
--- a/arch/s390/kernel/idle.c
+++ b/arch/s390/kernel/idle.c
@@ -39,14 +39,13 @@ void enabled_wait(void)
 	local_irq_restore(flags);
 
 	/* Account time spent with enabled wait psw loaded as idle time. */
-	/* XXX seqcount has tracepoints that require RCU */
-	write_seqcount_begin(&idle->seqcount);
+	raw_write_seqcount_begin(&idle->seqcount);
 	idle_time = idle->clock_idle_exit - idle->clock_idle_enter;
 	idle->clock_idle_enter = idle->clock_idle_exit = 0ULL;
 	idle->idle_time += idle_time;
 	idle->idle_count++;
 	account_idle_time(cputime_to_nsecs(idle_time));
-	write_seqcount_end(&idle->seqcount);
+	raw_write_seqcount_end(&idle->seqcount);
 }
 NOKPROBE_SYMBOL(enabled_wait);
 
-- 
GitLab


From b6186d7fb53349efd274263a45f0b08749ccaa2d Mon Sep 17 00:00:00 2001
From: Harald Freudenberger <freude@linux.ibm.com>
Date: Wed, 9 Sep 2020 11:59:43 +0200
Subject: [PATCH 1200/1341] s390/zcrypt: fix kmalloc 256k failure

Tests showed that under stress conditions the kernel may
temporary fail to allocate 256k with kmalloc. However,
this fix reworks the related code in the cca_findcard2()
function to use kvmalloc instead.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Ingo Franzki <ifranzki@linux.ibm.com>
Cc: Stable <stable@vger.kernel.org>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 drivers/s390/crypto/zcrypt_ccamisc.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/s390/crypto/zcrypt_ccamisc.c b/drivers/s390/crypto/zcrypt_ccamisc.c
index 3f5b61351cde5..c793dcabd551c 100644
--- a/drivers/s390/crypto/zcrypt_ccamisc.c
+++ b/drivers/s390/crypto/zcrypt_ccamisc.c
@@ -1692,9 +1692,9 @@ int cca_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
 	*nr_apqns = 0;
 
 	/* fetch status of all crypto cards */
-	device_status = kmalloc_array(MAX_ZDEV_ENTRIES_EXT,
-				      sizeof(struct zcrypt_device_status_ext),
-				      GFP_KERNEL);
+	device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
+				       sizeof(struct zcrypt_device_status_ext),
+				       GFP_KERNEL);
 	if (!device_status)
 		return -ENOMEM;
 	zcrypt_device_status_mask_ext(device_status);
@@ -1762,7 +1762,7 @@ int cca_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
 		verify = 0;
 	}
 
-	kfree(device_status);
+	kvfree(device_status);
 	return rc;
 }
 EXPORT_SYMBOL(cca_findcard2);
-- 
GitLab


From fcb2b70cdb194157678fb1a75f9ff499aeba3d2a Mon Sep 17 00:00:00 2001
From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Wed, 9 Sep 2020 14:27:25 +0200
Subject: [PATCH 1201/1341] s390/init: add missing __init annotations

Add __init to reserve_memory_end, reserve_oldmem and remove_oldmem.
Sometimes these functions are not inlined, and then the build
complains about section mismatch.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 arch/s390/kernel/setup.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index e600f6953d7ce..c2c1b4e723eaf 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -619,7 +619,7 @@ static struct notifier_block kdump_mem_nb = {
 /*
  * Make sure that the area behind memory_end is protected
  */
-static void reserve_memory_end(void)
+static void __init reserve_memory_end(void)
 {
 	if (memory_end_set)
 		memblock_reserve(memory_end, ULONG_MAX);
@@ -628,7 +628,7 @@ static void reserve_memory_end(void)
 /*
  * Make sure that oldmem, where the dump is stored, is protected
  */
-static void reserve_oldmem(void)
+static void __init reserve_oldmem(void)
 {
 #ifdef CONFIG_CRASH_DUMP
 	if (OLDMEM_BASE)
@@ -640,7 +640,7 @@ static void reserve_oldmem(void)
 /*
  * Make sure that oldmem, where the dump is stored, is protected
  */
-static void remove_oldmem(void)
+static void __init remove_oldmem(void)
 {
 #ifdef CONFIG_CRASH_DUMP
 	if (OLDMEM_BASE)
-- 
GitLab


From afdf9550e54627fcf4dd609bdc1153059378cdf5 Mon Sep 17 00:00:00 2001
From: Niklas Schnelle <schnelle@linux.ibm.com>
Date: Thu, 3 Sep 2020 13:42:57 +0200
Subject: [PATCH 1202/1341] s390/pci: fix leak of DMA tables on hard unplug

commit f606b3ef47c9 ("s390/pci: adapt events for zbus") removed the
zpci_disable_device() call for a zPCI event with PEC 0x0304 because
the device is already deconfigured by the platform.
This however skips the Linux side of the disable in particular it leads
to leaking the DMA tables and bitmaps because zpci_dma_exit_device() is
never called on the device.

If the device transitions to the Reserved state we call zpci_zdev_put()
but zpci_release_device() will not call zpci_disable_device() because
the state of the zPCI function is already ZPCI_FN_STATE_STANDBY.

If the device is put into the Standby state, zpci_disable_device() is
not called and the device is assumed to have been put in Standby through
platform action.
At this point the device may be removed by a subsequent event with PEC
0x0308 or 0x0306 which calls zpci_zdev_put() with the same problem
as above or the device may be configured again in which case
zpci_disable_device() is also not called.

Fix this by calling zpci_disable_device() explicitly for PEC 0x0304 as
before. To make it more clear that zpci_disable_device() may be called,
even if the lower level device has already been disabled by the
platform, add a comment to zpci_disable_device().

Cc: <stable@vger.kernel.org> # 5.8
Fixes: f606b3ef47c9 ("s390/pci: adapt events for zbus")
Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 arch/s390/pci/pci.c       | 4 ++++
 arch/s390/pci/pci_event.c | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index 4b62d6b550246..1804230dd8d82 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -668,6 +668,10 @@ EXPORT_SYMBOL_GPL(zpci_enable_device);
 int zpci_disable_device(struct zpci_dev *zdev)
 {
 	zpci_dma_exit_device(zdev);
+	/*
+	 * The zPCI function may already be disabled by the platform, this is
+	 * detected in clp_disable_fh() which becomes a no-op.
+	 */
 	return clp_disable_fh(zdev);
 }
 EXPORT_SYMBOL_GPL(zpci_disable_device);
diff --git a/arch/s390/pci/pci_event.c b/arch/s390/pci/pci_event.c
index 9a3a291cad432..d9ae7456dd4c8 100644
--- a/arch/s390/pci/pci_event.c
+++ b/arch/s390/pci/pci_event.c
@@ -143,6 +143,8 @@ static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
 			zpci_remove_device(zdev);
 		}
 
+		zdev->fh = ccdf->fh;
+		zpci_disable_device(zdev);
 		zdev->state = ZPCI_FN_STATE_STANDBY;
 		if (!clp_get_state(ccdf->fid, &state) &&
 		    state == ZPCI_FN_STATE_RESERVED) {
-- 
GitLab


From 73ac74c7d489756d2313219a108809921dbfaea1 Mon Sep 17 00:00:00 2001
From: Sven Schnelle <svens@linux.ibm.com>
Date: Thu, 10 Sep 2020 12:24:53 +0200
Subject: [PATCH 1203/1341] lockdep: fix order in trace_hardirqs_off_caller()

Switch order so that locking state is consistent even
if the IRQ tracer calls into lockdep again.

Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 kernel/trace/trace_preemptirq.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/trace/trace_preemptirq.c b/kernel/trace/trace_preemptirq.c
index f10073e626030..f4938040c2286 100644
--- a/kernel/trace/trace_preemptirq.c
+++ b/kernel/trace/trace_preemptirq.c
@@ -102,14 +102,14 @@ NOKPROBE_SYMBOL(trace_hardirqs_on_caller);
 
 __visible void trace_hardirqs_off_caller(unsigned long caller_addr)
 {
+	lockdep_hardirqs_off(CALLER_ADDR0);
+
 	if (!this_cpu_read(tracing_irq_cpu)) {
 		this_cpu_write(tracing_irq_cpu, 1);
 		tracer_hardirqs_off(CALLER_ADDR0, caller_addr);
 		if (!in_nmi())
 			trace_irq_disable_rcuidle(CALLER_ADDR0, caller_addr);
 	}
-
-	lockdep_hardirqs_off(CALLER_ADDR0);
 }
 EXPORT_SYMBOL(trace_hardirqs_off_caller);
 NOKPROBE_SYMBOL(trace_hardirqs_off_caller);
-- 
GitLab


From cd4d3d5f21ddbfae3f686ac0ff405f21f7847ad3 Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Tue, 8 Sep 2020 09:05:04 -0400
Subject: [PATCH 1204/1341] s390: add 3f program exception handler

Program exception 3f (secure storage violation) can only be detected
when the CPU is running in SIE with a format 4 state description,
e.g. running a protected guest. Because of this and because user
space partly controls the guest memory mapping and can trigger this
exception, we want to send a SIGSEGV to the process running the guest
and not panic the kernel.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Cc: <stable@vger.kernel.org> # 5.7
Fixes: 084ea4d611a3 ("s390/mm: add (non)secure page access exceptions handlers")
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 arch/s390/kernel/entry.h     |  1 +
 arch/s390/kernel/pgm_check.S |  2 +-
 arch/s390/mm/fault.c         | 20 ++++++++++++++++++++
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/arch/s390/kernel/entry.h b/arch/s390/kernel/entry.h
index faca269d5f278..a44ddc2f2dec5 100644
--- a/arch/s390/kernel/entry.h
+++ b/arch/s390/kernel/entry.h
@@ -26,6 +26,7 @@ void do_protection_exception(struct pt_regs *regs);
 void do_dat_exception(struct pt_regs *regs);
 void do_secure_storage_access(struct pt_regs *regs);
 void do_non_secure_storage_access(struct pt_regs *regs);
+void do_secure_storage_violation(struct pt_regs *regs);
 
 void addressing_exception(struct pt_regs *regs);
 void data_exception(struct pt_regs *regs);
diff --git a/arch/s390/kernel/pgm_check.S b/arch/s390/kernel/pgm_check.S
index 2c27907a5ffcb..9a92638360eee 100644
--- a/arch/s390/kernel/pgm_check.S
+++ b/arch/s390/kernel/pgm_check.S
@@ -80,7 +80,7 @@ PGM_CHECK(do_dat_exception)		/* 3b */
 PGM_CHECK_DEFAULT			/* 3c */
 PGM_CHECK(do_secure_storage_access)	/* 3d */
 PGM_CHECK(do_non_secure_storage_access)	/* 3e */
-PGM_CHECK_DEFAULT			/* 3f */
+PGM_CHECK(do_secure_storage_violation)	/* 3f */
 PGM_CHECK(monitor_event_exception)	/* 40 */
 PGM_CHECK_DEFAULT			/* 41 */
 PGM_CHECK_DEFAULT			/* 42 */
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index 4c8c063bce5b1..996884dcc9fdb 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -859,6 +859,21 @@ void do_non_secure_storage_access(struct pt_regs *regs)
 }
 NOKPROBE_SYMBOL(do_non_secure_storage_access);
 
+void do_secure_storage_violation(struct pt_regs *regs)
+{
+	/*
+	 * Either KVM messed up the secure guest mapping or the same
+	 * page is mapped into multiple secure guests.
+	 *
+	 * This exception is only triggered when a guest 2 is running
+	 * and can therefore never occur in kernel context.
+	 */
+	printk_ratelimited(KERN_WARNING
+			   "Secure storage violation in task: %s, pid %d\n",
+			   current->comm, current->pid);
+	send_sig(SIGSEGV, current, 0);
+}
+
 #else
 void do_secure_storage_access(struct pt_regs *regs)
 {
@@ -869,4 +884,9 @@ void do_non_secure_storage_access(struct pt_regs *regs)
 {
 	default_trap_handler(regs);
 }
+
+void do_secure_storage_violation(struct pt_regs *regs)
+{
+	default_trap_handler(regs);
+}
 #endif
-- 
GitLab


From 09e43968db40c33a73e9ddbfd937f46d5c334924 Mon Sep 17 00:00:00 2001
From: Arvind Sankar <nivedita@alum.mit.edu>
Date: Tue, 11 Aug 2020 20:43:08 -0400
Subject: [PATCH 1205/1341] x86/boot/compressed: Disable relocation relaxation

The x86-64 psABI [0] specifies special relocation types
(R_X86_64_[REX_]GOTPCRELX) for indirection through the Global Offset
Table, semantically equivalent to R_X86_64_GOTPCREL, which the linker
can take advantage of for optimization (relaxation) at link time. This
is supported by LLD and binutils versions 2.26 onwards.

The compressed kernel is position-independent code, however, when using
LLD or binutils versions before 2.27, it must be linked without the -pie
option. In this case, the linker may optimize certain instructions into
a non-position-independent form, by converting foo@GOTPCREL(%rip) to $foo.

This potential issue has been present with LLD and binutils-2.26 for a
long time, but it has never manifested itself before now:

- LLD and binutils-2.26 only relax
	movq	foo@GOTPCREL(%rip), %reg
  to
	leaq	foo(%rip), %reg
  which is still position-independent, rather than
	mov	$foo, %reg
  which is permitted by the psABI when -pie is not enabled.

- GCC happens to only generate GOTPCREL relocations on mov instructions.

- CLang does generate GOTPCREL relocations on non-mov instructions, but
  when building the compressed kernel, it uses its integrated assembler
  (due to the redefinition of KBUILD_CFLAGS dropping -no-integrated-as),
  which has so far defaulted to not generating the GOTPCRELX
  relocations.

Nick Desaulniers reports [1,2]:

  "A recent change [3] to a default value of configuration variable
   (ENABLE_X86_RELAX_RELOCATIONS OFF -> ON) in LLVM now causes Clang's
   integrated assembler to emit R_X86_64_GOTPCRELX/R_X86_64_REX_GOTPCRELX
   relocations. LLD will relax instructions with these relocations based
   on whether the image is being linked as position independent or not.
   When not, then LLD will relax these instructions to use absolute
   addressing mode (R_RELAX_GOT_PC_NOPIC). This causes kernels built with
   Clang and linked with LLD to fail to boot."

Patch series [4] is a solution to allow the compressed kernel to be
linked with -pie unconditionally, but even if merged is unlikely to be
backported. As a simple solution that can be applied to stable as well,
prevent the assembler from generating the relaxed relocation types using
the -mrelax-relocations=no option. For ease of backporting, do this
unconditionally.

[0] https://gitlab.com/x86-psABIs/x86-64-ABI/-/blob/master/x86-64-ABI/linker-optimization.tex#L65
[1] https://lore.kernel.org/lkml/20200807194100.3570838-1-ndesaulniers@google.com/
[2] https://github.com/ClangBuiltLinux/linux/issues/1121
[3] https://reviews.llvm.org/rGc41a18cf61790fc898dcda1055c3efbf442c14c0
[4] https://lore.kernel.org/lkml/20200731202738.2577854-1-nivedita@alum.mit.edu/

Reported-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20200812004308.1448603-1-nivedita@alum.mit.edu
---
 arch/x86/boot/compressed/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 3962f592633d1..ff7894f39e0ea 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -43,6 +43,8 @@ KBUILD_CFLAGS += -Wno-pointer-sign
 KBUILD_CFLAGS += $(call cc-option,-fmacro-prefix-map=$(srctree)/=)
 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 KBUILD_CFLAGS += -D__DISABLE_EXPORTS
+# Disable relocation relaxation in case the link is not PIE.
+KBUILD_CFLAGS += $(call as-option,-Wa$(comma)-mrelax-relocations=no)
 
 KBUILD_AFLAGS  := $(KBUILD_CFLAGS) -D__ASSEMBLY__
 GCOV_PROFILE := n
-- 
GitLab


From 911e1987efc8f3e6445955fbae7f54b428b92bd3 Mon Sep 17 00:00:00 2001
From: Michael Kelley <mikelley@microsoft.com>
Date: Sun, 13 Sep 2020 12:47:29 -0700
Subject: [PATCH 1206/1341] Drivers: hv: vmbus: Add timeout to
 vmbus_wait_for_unload

vmbus_wait_for_unload() looks for a CHANNELMSG_UNLOAD_RESPONSE message
coming from Hyper-V.  But if the message isn't found for some reason,
the panic path gets hung forever.  Add a timeout of 10 seconds to prevent
this.

Fixes: 415719160de3 ("Drivers: hv: vmbus: avoid scheduling in interrupt context in vmbus_initiate_unload()")
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Link: https://lore.kernel.org/r/1600026449-23651-1-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
---
 drivers/hv/channel_mgmt.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 417a95e5094dd..af7832e131674 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -750,7 +750,7 @@ static void vmbus_wait_for_unload(void)
 	void *page_addr;
 	struct hv_message *msg;
 	struct vmbus_channel_message_header *hdr;
-	u32 message_type;
+	u32 message_type, i;
 
 	/*
 	 * CHANNELMSG_UNLOAD_RESPONSE is always delivered to the CPU which was
@@ -760,8 +760,11 @@ static void vmbus_wait_for_unload(void)
 	 * functional and vmbus_unload_response() will complete
 	 * vmbus_connection.unload_event. If not, the last thing we can do is
 	 * read message pages for all CPUs directly.
+	 *
+	 * Wait no more than 10 seconds so that the panic path can't get
+	 * hung forever in case the response message isn't seen.
 	 */
-	while (1) {
+	for (i = 0; i < 1000; i++) {
 		if (completion_done(&vmbus_connection.unload_event))
 			break;
 
-- 
GitLab


From 1c78544eaa4660096aeb6a57ec82b42cdb3bfe5a Mon Sep 17 00:00:00 2001
From: Filipe Manana <fdmanana@suse.com>
Date: Mon, 14 Sep 2020 09:01:04 +0100
Subject: [PATCH 1207/1341] btrfs: fix wrong address when faulting in pages in
 the search ioctl

When faulting in the pages for the user supplied buffer for the search
ioctl, we are passing only the base address of the buffer to the function
fault_in_pages_writeable(). This means that after the first iteration of
the while loop that searches for leaves, when we have a non-zero offset,
stored in 'sk_offset', we try to fault in a wrong page range.

So fix this by adding the offset in 'sk_offset' to the base address of the
user supplied buffer when calling fault_in_pages_writeable().

Several users have reported that the applications compsize and bees have
started to operate incorrectly since commit a48b73eca4ceb9 ("btrfs: fix
potential deadlock in the search ioctl") was added to stable trees, and
these applications make heavy use of the search ioctls. This fixes their
issues.

Link: https://lore.kernel.org/linux-btrfs/632b888d-a3c3-b085-cdf5-f9bb61017d92@lechevalier.se/
Link: https://github.com/kilobyte/compsize/issues/34
Fixes: a48b73eca4ceb9 ("btrfs: fix potential deadlock in the search ioctl")
CC: stable@vger.kernel.org # 4.4+
Tested-by: A L <mail@lechevalier.se>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---
 fs/btrfs/ioctl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index ac45f022b4958..2d9109d9e98f9 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -2193,7 +2193,8 @@ static noinline int search_ioctl(struct inode *inode,
 	key.offset = sk->min_offset;
 
 	while (1) {
-		ret = fault_in_pages_writeable(ubuf, *buf_size - sk_offset);
+		ret = fault_in_pages_writeable(ubuf + sk_offset,
+					       *buf_size - sk_offset);
 		if (ret)
 			break;
 
-- 
GitLab


From 7d90a9b2693a753abfc7034eacea5bbcbb566560 Mon Sep 17 00:00:00 2001
From: Yicong Yang <yangyicong@hisilicon.com>
Date: Fri, 4 Sep 2020 15:47:19 +0800
Subject: [PATCH 1208/1341] Revert "mtd: spi-nor: Disable the flash quad mode
 in spi_nor_restore()"

Previous patch intends to restore the flash's QE bit when removed/shutdown,
but may have some problems and break the flash:

- for those originally in Quad mode, this patch will clear the QE bit
  when unloaded the flash, which is incorrect.
- even with above problem solved, it may still break the flash as some
  flash's QE bit is non-volatile and lots of set/reset will wear out
  the bit.
- the restore method cannot be proved to be valid as if a hard
  reset or accident crash happened, the spi_nor_restore() won't be
  performed the the QE bit will not be restored as we expected to.

So let's revert it to fix this. The discussion can be found at [1].

This reverts commit cc59e6bb6cd69d3347c06ccce088c5c6052e041e.

[1] https://lore.kernel.org/linux-mtd/CAO8h3eFLVLRmw7u+rurKsg7=Nh2q-HVq-HgVXig8gf5Dffk8MA@mail.gmail.com/

Reported-by: Matthias Weisser <m.weisser.m@gmail.com>
Suggested-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/1599205640-26690-1-git-send-email-yangyicong@hisilicon.com
---
 drivers/mtd/spi-nor/core.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 65eff4ce6ab1f..ab8f55438e21b 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -3000,8 +3000,6 @@ void spi_nor_restore(struct spi_nor *nor)
 	if (nor->addr_width == 4 && !(nor->flags & SNOR_F_4B_OPCODES) &&
 	    nor->flags & SNOR_F_BROKEN_RESET)
 		nor->params->set_4byte_addr_mode(nor, false);
-
-	spi_nor_quad_enable(nor, false);
 }
 EXPORT_SYMBOL_GPL(spi_nor_restore);
 
-- 
GitLab


From 1afc0c89f6a155c54c76d65ffcf72cd1232daf3a Mon Sep 17 00:00:00 2001
From: Yicong Yang <yangyicong@hisilicon.com>
Date: Fri, 4 Sep 2020 15:47:20 +0800
Subject: [PATCH 1209/1341] Revert "mtd: spi-nor: Add capability to disable
 flash quad mode"

As the only user has been removed in previous patch, let's revert
this one together.

This reverts commit be192209d5a33c912caa4a05d6f92b89328d8db8.

Reported-by: Matthias Weisser <m.weisser.m@gmail.com>
Suggested-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/1599205640-26690-2-git-send-email-yangyicong@hisilicon.com
---
 drivers/mtd/spi-nor/core.c | 55 +++++++++++++-------------------------
 drivers/mtd/spi-nor/core.h | 10 +++----
 2 files changed, 24 insertions(+), 41 deletions(-)

diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index ab8f55438e21b..0369d98b2d12e 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -1907,16 +1907,15 @@ static int spi_nor_is_locked(struct mtd_info *mtd, loff_t ofs, uint64_t len)
 }
 
 /**
- * spi_nor_sr1_bit6_quad_enable() - Set/Unset the Quad Enable BIT(6) in the
- *                                  Status Register 1.
+ * spi_nor_sr1_bit6_quad_enable() - Set the Quad Enable BIT(6) in the Status
+ * Register 1.
  * @nor:	pointer to a 'struct spi_nor'
- * @enable:	true to enable Quad mode, false to disable Quad mode.
  *
  * Bit 6 of the Status Register 1 is the QE bit for Macronix like QSPI memories.
  *
  * Return: 0 on success, -errno otherwise.
  */
-int spi_nor_sr1_bit6_quad_enable(struct spi_nor *nor, bool enable)
+int spi_nor_sr1_bit6_quad_enable(struct spi_nor *nor)
 {
 	int ret;
 
@@ -1924,56 +1923,45 @@ int spi_nor_sr1_bit6_quad_enable(struct spi_nor *nor, bool enable)
 	if (ret)
 		return ret;
 
-	if ((enable && (nor->bouncebuf[0] & SR1_QUAD_EN_BIT6)) ||
-	    (!enable && !(nor->bouncebuf[0] & SR1_QUAD_EN_BIT6)))
+	if (nor->bouncebuf[0] & SR1_QUAD_EN_BIT6)
 		return 0;
 
-	if (enable)
-		nor->bouncebuf[0] |= SR1_QUAD_EN_BIT6;
-	else
-		nor->bouncebuf[0] &= ~SR1_QUAD_EN_BIT6;
+	nor->bouncebuf[0] |= SR1_QUAD_EN_BIT6;
 
 	return spi_nor_write_sr1_and_check(nor, nor->bouncebuf[0]);
 }
 
 /**
- * spi_nor_sr2_bit1_quad_enable() - set/unset the Quad Enable BIT(1) in the
- *                                  Status Register 2.
+ * spi_nor_sr2_bit1_quad_enable() - set the Quad Enable BIT(1) in the Status
+ * Register 2.
  * @nor:       pointer to a 'struct spi_nor'.
- * @enable:	true to enable Quad mode, false to disable Quad mode.
  *
  * Bit 1 of the Status Register 2 is the QE bit for Spansion like QSPI memories.
  *
  * Return: 0 on success, -errno otherwise.
  */
-int spi_nor_sr2_bit1_quad_enable(struct spi_nor *nor, bool enable)
+int spi_nor_sr2_bit1_quad_enable(struct spi_nor *nor)
 {
 	int ret;
 
 	if (nor->flags & SNOR_F_NO_READ_CR)
-		return spi_nor_write_16bit_cr_and_check(nor,
-						enable ? SR2_QUAD_EN_BIT1 : 0);
+		return spi_nor_write_16bit_cr_and_check(nor, SR2_QUAD_EN_BIT1);
 
 	ret = spi_nor_read_cr(nor, nor->bouncebuf);
 	if (ret)
 		return ret;
 
-	if ((enable && (nor->bouncebuf[0] & SR2_QUAD_EN_BIT1)) ||
-	    (!enable && !(nor->bouncebuf[0] & SR2_QUAD_EN_BIT1)))
+	if (nor->bouncebuf[0] & SR2_QUAD_EN_BIT1)
 		return 0;
 
-	if (enable)
-		nor->bouncebuf[0] |= SR2_QUAD_EN_BIT1;
-	else
-		nor->bouncebuf[0] &= ~SR2_QUAD_EN_BIT1;
+	nor->bouncebuf[0] |= SR2_QUAD_EN_BIT1;
 
 	return spi_nor_write_16bit_cr_and_check(nor, nor->bouncebuf[0]);
 }
 
 /**
- * spi_nor_sr2_bit7_quad_enable() - set/unset QE bit in Status Register 2.
+ * spi_nor_sr2_bit7_quad_enable() - set QE bit in Status Register 2.
  * @nor:	pointer to a 'struct spi_nor'
- * @enable:	true to enable Quad mode, false to disable Quad mode.
  *
  * Set the Quad Enable (QE) bit in the Status Register 2.
  *
@@ -1983,7 +1971,7 @@ int spi_nor_sr2_bit1_quad_enable(struct spi_nor *nor, bool enable)
  *
  * Return: 0 on success, -errno otherwise.
  */
-int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor, bool enable)
+int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor)
 {
 	u8 *sr2 = nor->bouncebuf;
 	int ret;
@@ -1993,15 +1981,11 @@ int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor, bool enable)
 	ret = spi_nor_read_sr2(nor, sr2);
 	if (ret)
 		return ret;
-	if ((enable && (*sr2 & SR2_QUAD_EN_BIT7)) ||
-	    (!enable && !(*sr2 & SR2_QUAD_EN_BIT7)))
+	if (*sr2 & SR2_QUAD_EN_BIT7)
 		return 0;
 
 	/* Update the Quad Enable bit. */
-	if (enable)
-		*sr2 |= SR2_QUAD_EN_BIT7;
-	else
-		*sr2 &= ~SR2_QUAD_EN_BIT7;
+	*sr2 |= SR2_QUAD_EN_BIT7;
 
 	ret = spi_nor_write_sr2(nor, sr2);
 	if (ret)
@@ -2914,13 +2898,12 @@ static int spi_nor_init_params(struct spi_nor *nor)
 }
 
 /**
- * spi_nor_quad_enable() - enable/disable Quad I/O if needed.
+ * spi_nor_quad_enable() - enable Quad I/O if needed.
  * @nor:                pointer to a 'struct spi_nor'
- * @enable:             true to enable Quad mode. false to disable Quad mode.
  *
  * Return: 0 on success, -errno otherwise.
  */
-static int spi_nor_quad_enable(struct spi_nor *nor, bool enable)
+static int spi_nor_quad_enable(struct spi_nor *nor)
 {
 	if (!nor->params->quad_enable)
 		return 0;
@@ -2929,7 +2912,7 @@ static int spi_nor_quad_enable(struct spi_nor *nor, bool enable)
 	      spi_nor_get_protocol_width(nor->write_proto) == 4))
 		return 0;
 
-	return nor->params->quad_enable(nor, enable);
+	return nor->params->quad_enable(nor);
 }
 
 /**
@@ -2953,7 +2936,7 @@ static int spi_nor_init(struct spi_nor *nor)
 {
 	int err;
 
-	err = spi_nor_quad_enable(nor, true);
+	err = spi_nor_quad_enable(nor);
 	if (err) {
 		dev_dbg(nor->dev, "quad mode not supported\n");
 		return err;
diff --git a/drivers/mtd/spi-nor/core.h b/drivers/mtd/spi-nor/core.h
index 95aa32f3ceb18..6f2f6b27173fd 100644
--- a/drivers/mtd/spi-nor/core.h
+++ b/drivers/mtd/spi-nor/core.h
@@ -198,7 +198,7 @@ struct spi_nor_locking_ops {
  *                      higher index in the array, the higher priority.
  * @erase_map:		the erase map parsed from the SFDP Sector Map Parameter
  *                      Table.
- * @quad_enable:	enables/disables SPI NOR Quad mode.
+ * @quad_enable:	enables SPI NOR quad mode.
  * @set_4byte_addr_mode: puts the SPI NOR in 4 byte addressing mode.
  * @convert_addr:	converts an absolute address into something the flash
  *                      will understand. Particularly useful when pagesize is
@@ -219,7 +219,7 @@ struct spi_nor_flash_parameter {
 
 	struct spi_nor_erase_map        erase_map;
 
-	int (*quad_enable)(struct spi_nor *nor, bool enable);
+	int (*quad_enable)(struct spi_nor *nor);
 	int (*set_4byte_addr_mode)(struct spi_nor *nor, bool enable);
 	u32 (*convert_addr)(struct spi_nor *nor, u32 addr);
 	int (*setup)(struct spi_nor *nor, const struct spi_nor_hwcaps *hwcaps);
@@ -406,9 +406,9 @@ int spi_nor_write_ear(struct spi_nor *nor, u8 ear);
 int spi_nor_wait_till_ready(struct spi_nor *nor);
 int spi_nor_lock_and_prep(struct spi_nor *nor);
 void spi_nor_unlock_and_unprep(struct spi_nor *nor);
-int spi_nor_sr1_bit6_quad_enable(struct spi_nor *nor, bool enable);
-int spi_nor_sr2_bit1_quad_enable(struct spi_nor *nor, bool enable);
-int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor, bool enable);
+int spi_nor_sr1_bit6_quad_enable(struct spi_nor *nor);
+int spi_nor_sr2_bit1_quad_enable(struct spi_nor *nor);
+int spi_nor_sr2_bit7_quad_enable(struct spi_nor *nor);
 
 int spi_nor_xread_sr(struct spi_nor *nor, u8 *sr);
 ssize_t spi_nor_read_data(struct spi_nor *nor, loff_t from, size_t len,
-- 
GitLab


From 50145474f6ef4a9c19205b173da6264a644c7489 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Mon, 7 Sep 2020 11:45:27 -0700
Subject: [PATCH 1210/1341] fbcon: remove soft scrollback code

This (and the VGA soft scrollback) turns out to have various nasty small
special cases that nobody really is willing to fight.  The soft
scrollback code was really useful a few decades ago when you typically
used the console interactively as the main way to interact with the
machine, but that just isn't the case any more.

So it's not worth dragging along.

Tested-by: Yuan Ming <yuanmingbuaa@gmail.com>
Tested-by: Willy Tarreau <w@1wt.eu>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/video/fbdev/core/fbcon.c | 334 +------------------------------
 1 file changed, 4 insertions(+), 330 deletions(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 66167830fefd1..983472dbd2aa3 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -122,12 +122,6 @@ static int logo_lines;
 /* logo_shown is an index to vc_cons when >= 0; otherwise follows FBCON_LOGO
    enums.  */
 static int logo_shown = FBCON_LOGO_CANSHOW;
-/* Software scrollback */
-static int fbcon_softback_size = 32768;
-static unsigned long softback_buf, softback_curr;
-static unsigned long softback_in;
-static unsigned long softback_top, softback_end;
-static int softback_lines;
 /* console mappings */
 static int first_fb_vc;
 static int last_fb_vc = MAX_NR_CONSOLES - 1;
@@ -167,8 +161,6 @@ static int margin_color;
 
 static const struct consw fb_con;
 
-#define CM_SOFTBACK	(8)
-
 #define advance_row(p, delta) (unsigned short *)((unsigned long)(p) + (delta) * vc->vc_size_row)
 
 static int fbcon_set_origin(struct vc_data *);
@@ -373,18 +365,6 @@ static int get_color(struct vc_data *vc, struct fb_info *info,
 	return color;
 }
 
-static void fbcon_update_softback(struct vc_data *vc)
-{
-	int l = fbcon_softback_size / vc->vc_size_row;
-
-	if (l > 5)
-		softback_end = softback_buf + l * vc->vc_size_row;
-	else
-		/* Smaller scrollback makes no sense, and 0 would screw
-		   the operation totally */
-		softback_top = 0;
-}
-
 static void fb_flashcursor(struct work_struct *work)
 {
 	struct fb_info *info = container_of(work, struct fb_info, queue);
@@ -414,7 +394,7 @@ static void fb_flashcursor(struct work_struct *work)
 	c = scr_readw((u16 *) vc->vc_pos);
 	mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 		CM_ERASE : CM_DRAW;
-	ops->cursor(vc, info, mode, softback_lines, get_color(vc, info, c, 1),
+	ops->cursor(vc, info, mode, 0, get_color(vc, info, c, 1),
 		    get_color(vc, info, c, 0));
 	console_unlock();
 }
@@ -471,13 +451,7 @@ static int __init fb_console_setup(char *this_opt)
 		}
 		
 		if (!strncmp(options, "scrollback:", 11)) {
-			options += 11;
-			if (*options) {
-				fbcon_softback_size = simple_strtoul(options, &options, 0);
-				if (*options == 'k' || *options == 'K') {
-					fbcon_softback_size *= 1024;
-				}
-			}
+			pr_warn("Ignoring scrollback size option\n");
 			continue;
 		}
 		
@@ -1022,31 +996,6 @@ static const char *fbcon_startup(void)
 
 	set_blitting_type(vc, info);
 
-	if (info->fix.type != FB_TYPE_TEXT) {
-		if (fbcon_softback_size) {
-			if (!softback_buf) {
-				softback_buf =
-				    (unsigned long)
-				    kvmalloc(fbcon_softback_size,
-					    GFP_KERNEL);
-				if (!softback_buf) {
-					fbcon_softback_size = 0;
-					softback_top = 0;
-				}
-			}
-		} else {
-			if (softback_buf) {
-				kvfree((void *) softback_buf);
-				softback_buf = 0;
-				softback_top = 0;
-			}
-		}
-		if (softback_buf)
-			softback_in = softback_top = softback_curr =
-			    softback_buf;
-		softback_lines = 0;
-	}
-
 	/* Setup default font */
 	if (!p->fontdata && !vc->vc_font.data) {
 		if (!fontname[0] || !(font = find_font(fontname)))
@@ -1220,9 +1169,6 @@ static void fbcon_init(struct vc_data *vc, int init)
 	if (logo)
 		fbcon_prepare_logo(vc, info, cols, rows, new_cols, new_rows);
 
-	if (vc == svc && softback_buf)
-		fbcon_update_softback(vc);
-
 	if (ops->rotate_font && ops->rotate_font(info, vc)) {
 		ops->rotate = FB_ROTATE_UR;
 		set_blitting_type(vc, info);
@@ -1385,7 +1331,6 @@ static void fbcon_cursor(struct vc_data *vc, int mode)
 {
 	struct fb_info *info = registered_fb[con2fb_map[vc->vc_num]];
 	struct fbcon_ops *ops = info->fbcon_par;
-	int y;
  	int c = scr_readw((u16 *) vc->vc_pos);
 
 	ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
@@ -1399,16 +1344,8 @@ static void fbcon_cursor(struct vc_data *vc, int mode)
 		fbcon_add_cursor_timer(info);
 
 	ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
-	if (mode & CM_SOFTBACK) {
-		mode &= ~CM_SOFTBACK;
-		y = softback_lines;
-	} else {
-		if (softback_lines)
-			fbcon_set_origin(vc);
-		y = 0;
-	}
 
-	ops->cursor(vc, info, mode, y, get_color(vc, info, c, 1),
+	ops->cursor(vc, info, mode, 0, get_color(vc, info, c, 1),
 		    get_color(vc, info, c, 0));
 }
 
@@ -1479,8 +1416,6 @@ static void fbcon_set_disp(struct fb_info *info, struct fb_var_screeninfo *var,
 
 	if (con_is_visible(vc)) {
 		update_screen(vc);
-		if (softback_buf)
-			fbcon_update_softback(vc);
 	}
 }
 
@@ -1618,99 +1553,6 @@ static __inline__ void ypan_down_redraw(struct vc_data *vc, int t, int count)
 	scrollback_current = 0;
 }
 
-static void fbcon_redraw_softback(struct vc_data *vc, struct fbcon_display *p,
-				  long delta)
-{
-	int count = vc->vc_rows;
-	unsigned short *d, *s;
-	unsigned long n;
-	int line = 0;
-
-	d = (u16 *) softback_curr;
-	if (d == (u16 *) softback_in)
-		d = (u16 *) vc->vc_origin;
-	n = softback_curr + delta * vc->vc_size_row;
-	softback_lines -= delta;
-	if (delta < 0) {
-		if (softback_curr < softback_top && n < softback_buf) {
-			n += softback_end - softback_buf;
-			if (n < softback_top) {
-				softback_lines -=
-				    (softback_top - n) / vc->vc_size_row;
-				n = softback_top;
-			}
-		} else if (softback_curr >= softback_top
-			   && n < softback_top) {
-			softback_lines -=
-			    (softback_top - n) / vc->vc_size_row;
-			n = softback_top;
-		}
-	} else {
-		if (softback_curr > softback_in && n >= softback_end) {
-			n += softback_buf - softback_end;
-			if (n > softback_in) {
-				n = softback_in;
-				softback_lines = 0;
-			}
-		} else if (softback_curr <= softback_in && n > softback_in) {
-			n = softback_in;
-			softback_lines = 0;
-		}
-	}
-	if (n == softback_curr)
-		return;
-	softback_curr = n;
-	s = (u16 *) softback_curr;
-	if (s == (u16 *) softback_in)
-		s = (u16 *) vc->vc_origin;
-	while (count--) {
-		unsigned short *start;
-		unsigned short *le;
-		unsigned short c;
-		int x = 0;
-		unsigned short attr = 1;
-
-		start = s;
-		le = advance_row(s, 1);
-		do {
-			c = scr_readw(s);
-			if (attr != (c & 0xff00)) {
-				attr = c & 0xff00;
-				if (s > start) {
-					fbcon_putcs(vc, start, s - start,
-						    line, x);
-					x += s - start;
-					start = s;
-				}
-			}
-			if (c == scr_readw(d)) {
-				if (s > start) {
-					fbcon_putcs(vc, start, s - start,
-						    line, x);
-					x += s - start + 1;
-					start = s + 1;
-				} else {
-					x++;
-					start++;
-				}
-			}
-			s++;
-			d++;
-		} while (s < le);
-		if (s > start)
-			fbcon_putcs(vc, start, s - start, line, x);
-		line++;
-		if (d == (u16 *) softback_end)
-			d = (u16 *) softback_buf;
-		if (d == (u16 *) softback_in)
-			d = (u16 *) vc->vc_origin;
-		if (s == (u16 *) softback_end)
-			s = (u16 *) softback_buf;
-		if (s == (u16 *) softback_in)
-			s = (u16 *) vc->vc_origin;
-	}
-}
-
 static void fbcon_redraw_move(struct vc_data *vc, struct fbcon_display *p,
 			      int line, int count, int dy)
 {
@@ -1850,31 +1692,6 @@ static void fbcon_redraw(struct vc_data *vc, struct fbcon_display *p,
 	}
 }
 
-static inline void fbcon_softback_note(struct vc_data *vc, int t,
-				       int count)
-{
-	unsigned short *p;
-
-	if (vc->vc_num != fg_console)
-		return;
-	p = (unsigned short *) (vc->vc_origin + t * vc->vc_size_row);
-
-	while (count) {
-		scr_memcpyw((u16 *) softback_in, p, vc->vc_size_row);
-		count--;
-		p = advance_row(p, 1);
-		softback_in += vc->vc_size_row;
-		if (softback_in == softback_end)
-			softback_in = softback_buf;
-		if (softback_in == softback_top) {
-			softback_top += vc->vc_size_row;
-			if (softback_top == softback_end)
-				softback_top = softback_buf;
-		}
-	}
-	softback_curr = softback_in;
-}
-
 static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
 		enum con_scroll dir, unsigned int count)
 {
@@ -1897,8 +1714,6 @@ static bool fbcon_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
 	case SM_UP:
 		if (count > vc->vc_rows)	/* Maximum realistic size */
 			count = vc->vc_rows;
-		if (softback_top)
-			fbcon_softback_note(vc, t, count);
 		if (logo_shown >= 0)
 			goto redraw_up;
 		switch (p->scrollmode) {
@@ -2269,14 +2084,6 @@ static int fbcon_switch(struct vc_data *vc)
 	info = registered_fb[con2fb_map[vc->vc_num]];
 	ops = info->fbcon_par;
 
-	if (softback_top) {
-		if (softback_lines)
-			fbcon_set_origin(vc);
-		softback_top = softback_curr = softback_in = softback_buf;
-		softback_lines = 0;
-		fbcon_update_softback(vc);
-	}
-
 	if (logo_shown >= 0) {
 		struct vc_data *conp2 = vc_cons[logo_shown].d;
 
@@ -2600,9 +2407,6 @@ static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
 	int cnt;
 	char *old_data = NULL;
 
-	if (con_is_visible(vc) && softback_lines)
-		fbcon_set_origin(vc);
-
 	resize = (w != vc->vc_font.width) || (h != vc->vc_font.height);
 	if (p->userfont)
 		old_data = vc->vc_font.data;
@@ -2628,8 +2432,6 @@ static int fbcon_do_set_font(struct vc_data *vc, int w, int h,
 		cols /= w;
 		rows /= h;
 		vc_resize(vc, cols, rows);
-		if (con_is_visible(vc) && softback_buf)
-			fbcon_update_softback(vc);
 	} else if (con_is_visible(vc)
 		   && vc->vc_mode == KD_TEXT) {
 		fbcon_clear_margins(vc, 0);
@@ -2788,19 +2590,7 @@ static void fbcon_set_palette(struct vc_data *vc, const unsigned char *table)
 
 static u16 *fbcon_screen_pos(struct vc_data *vc, int offset)
 {
-	unsigned long p;
-	int line;
-	
-	if (vc->vc_num != fg_console || !softback_lines)
-		return (u16 *) (vc->vc_origin + offset);
-	line = offset / vc->vc_size_row;
-	if (line >= softback_lines)
-		return (u16 *) (vc->vc_origin + offset -
-				softback_lines * vc->vc_size_row);
-	p = softback_curr + offset;
-	if (p >= softback_end)
-		p += softback_buf - softback_end;
-	return (u16 *) p;
+	return (u16 *) (vc->vc_origin + offset);
 }
 
 static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
@@ -2814,22 +2604,7 @@ static unsigned long fbcon_getxy(struct vc_data *vc, unsigned long pos,
 
 		x = offset % vc->vc_cols;
 		y = offset / vc->vc_cols;
-		if (vc->vc_num == fg_console)
-			y += softback_lines;
 		ret = pos + (vc->vc_cols - x) * 2;
-	} else if (vc->vc_num == fg_console && softback_lines) {
-		unsigned long offset = pos - softback_curr;
-
-		if (pos < softback_curr)
-			offset += softback_end - softback_buf;
-		offset /= 2;
-		x = offset % vc->vc_cols;
-		y = offset / vc->vc_cols;
-		ret = pos + (vc->vc_cols - x) * 2;
-		if (ret == softback_end)
-			ret = softback_buf;
-		if (ret == softback_in)
-			ret = vc->vc_origin;
 	} else {
 		/* Should not happen */
 		x = y = 0;
@@ -2857,106 +2632,11 @@ static void fbcon_invert_region(struct vc_data *vc, u16 * p, int cnt)
 			a = ((a) & 0x88ff) | (((a) & 0x7000) >> 4) |
 			    (((a) & 0x0700) << 4);
 		scr_writew(a, p++);
-		if (p == (u16 *) softback_end)
-			p = (u16 *) softback_buf;
-		if (p == (u16 *) softback_in)
-			p = (u16 *) vc->vc_origin;
-	}
-}
-
-static void fbcon_scrolldelta(struct vc_data *vc, int lines)
-{
-	struct fb_info *info = registered_fb[con2fb_map[fg_console]];
-	struct fbcon_ops *ops = info->fbcon_par;
-	struct fbcon_display *disp = &fb_display[fg_console];
-	int offset, limit, scrollback_old;
-
-	if (softback_top) {
-		if (vc->vc_num != fg_console)
-			return;
-		if (vc->vc_mode != KD_TEXT || !lines)
-			return;
-		if (logo_shown >= 0) {
-			struct vc_data *conp2 = vc_cons[logo_shown].d;
-
-			if (conp2->vc_top == logo_lines
-			    && conp2->vc_bottom == conp2->vc_rows)
-				conp2->vc_top = 0;
-			if (logo_shown == vc->vc_num) {
-				unsigned long p, q;
-				int i;
-
-				p = softback_in;
-				q = vc->vc_origin +
-				    logo_lines * vc->vc_size_row;
-				for (i = 0; i < logo_lines; i++) {
-					if (p == softback_top)
-						break;
-					if (p == softback_buf)
-						p = softback_end;
-					p -= vc->vc_size_row;
-					q -= vc->vc_size_row;
-					scr_memcpyw((u16 *) q, (u16 *) p,
-						    vc->vc_size_row);
-				}
-				softback_in = softback_curr = p;
-				update_region(vc, vc->vc_origin,
-					      logo_lines * vc->vc_cols);
-			}
-			logo_shown = FBCON_LOGO_CANSHOW;
-		}
-		fbcon_cursor(vc, CM_ERASE | CM_SOFTBACK);
-		fbcon_redraw_softback(vc, disp, lines);
-		fbcon_cursor(vc, CM_DRAW | CM_SOFTBACK);
-		return;
 	}
-
-	if (!scrollback_phys_max)
-		return;
-
-	scrollback_old = scrollback_current;
-	scrollback_current -= lines;
-	if (scrollback_current < 0)
-		scrollback_current = 0;
-	else if (scrollback_current > scrollback_max)
-		scrollback_current = scrollback_max;
-	if (scrollback_current == scrollback_old)
-		return;
-
-	if (fbcon_is_inactive(vc, info))
-		return;
-
-	fbcon_cursor(vc, CM_ERASE);
-
-	offset = disp->yscroll - scrollback_current;
-	limit = disp->vrows;
-	switch (disp->scrollmode) {
-	case SCROLL_WRAP_MOVE:
-		info->var.vmode |= FB_VMODE_YWRAP;
-		break;
-	case SCROLL_PAN_MOVE:
-	case SCROLL_PAN_REDRAW:
-		limit -= vc->vc_rows;
-		info->var.vmode &= ~FB_VMODE_YWRAP;
-		break;
-	}
-	if (offset < 0)
-		offset += limit;
-	else if (offset >= limit)
-		offset -= limit;
-
-	ops->var.xoffset = 0;
-	ops->var.yoffset = offset * vc->vc_font.height;
-	ops->update_start(info);
-
-	if (!scrollback_current)
-		fbcon_cursor(vc, CM_DRAW);
 }
 
 static int fbcon_set_origin(struct vc_data *vc)
 {
-	if (softback_lines)
-		fbcon_scrolldelta(vc, softback_lines);
 	return 0;
 }
 
@@ -3020,8 +2700,6 @@ static void fbcon_modechanged(struct fb_info *info)
 
 		fbcon_set_palette(vc, color_table);
 		update_screen(vc);
-		if (softback_buf)
-			fbcon_update_softback(vc);
 	}
 }
 
@@ -3432,7 +3110,6 @@ static const struct consw fb_con = {
 	.con_font_default	= fbcon_set_def_font,
 	.con_font_copy 		= fbcon_copy_font,
 	.con_set_palette 	= fbcon_set_palette,
-	.con_scrolldelta 	= fbcon_scrolldelta,
 	.con_set_origin 	= fbcon_set_origin,
 	.con_invert_region 	= fbcon_invert_region,
 	.con_screen_pos 	= fbcon_screen_pos,
@@ -3667,9 +3344,6 @@ static void fbcon_exit(void)
 	}
 #endif
 
-	kvfree((void *)softback_buf);
-	softback_buf = 0UL;
-
 	for_each_registered_fb(i) {
 		int pending = 0;
 
-- 
GitLab


From 06a0df4d1b8b13b551668e47b11fd7629033b7df Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue, 8 Sep 2020 10:56:27 -0700
Subject: [PATCH 1211/1341] fbcon: remove now unusued 'softback_lines' cursor()
 argument

Since the softscroll code got removed, this argument is always zero and
makes no sense any more.

Tested-by: Yuan Ming <yuanmingbuaa@gmail.com>
Tested-by: Willy Tarreau <w@1wt.eu>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 drivers/video/fbdev/core/bitblit.c   | 11 +----------
 drivers/video/fbdev/core/fbcon.c     |  4 ++--
 drivers/video/fbdev/core/fbcon.h     |  2 +-
 drivers/video/fbdev/core/fbcon_ccw.c | 11 +----------
 drivers/video/fbdev/core/fbcon_cw.c  | 11 +----------
 drivers/video/fbdev/core/fbcon_ud.c  | 11 +----------
 drivers/video/fbdev/core/tileblit.c  |  2 +-
 7 files changed, 8 insertions(+), 44 deletions(-)

diff --git a/drivers/video/fbdev/core/bitblit.c b/drivers/video/fbdev/core/bitblit.c
index 4e6cbc24346d3..9725ecd1255ba 100644
--- a/drivers/video/fbdev/core/bitblit.c
+++ b/drivers/video/fbdev/core/bitblit.c
@@ -234,7 +234,7 @@ static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
 }
 
 static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
-		       int softback_lines, int fg, int bg)
+		       int fg, int bg)
 {
 	struct fb_cursor cursor;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -247,15 +247,6 @@ static void bit_cursor(struct vc_data *vc, struct fb_info *info, int mode,
 
 	cursor.set = 0;
 
-	if (softback_lines) {
-		if (y + softback_lines >= vc->vc_rows) {
-			mode = CM_ERASE;
-			ops->cursor_flash = 0;
-			return;
-		} else
-			y += softback_lines;
-	}
-
  	c = scr_readw((u16 *) vc->vc_pos);
 	attribute = get_attribute(info, c);
 	src = vc->vc_font.data + ((c & charmask) * (w * vc->vc_font.height));
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 983472dbd2aa3..0b49b0f44edfc 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -394,7 +394,7 @@ static void fb_flashcursor(struct work_struct *work)
 	c = scr_readw((u16 *) vc->vc_pos);
 	mode = (!ops->cursor_flash || ops->cursor_state.enable) ?
 		CM_ERASE : CM_DRAW;
-	ops->cursor(vc, info, mode, 0, get_color(vc, info, c, 1),
+	ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
 		    get_color(vc, info, c, 0));
 	console_unlock();
 }
@@ -1345,7 +1345,7 @@ static void fbcon_cursor(struct vc_data *vc, int mode)
 
 	ops->cursor_flash = (mode == CM_ERASE) ? 0 : 1;
 
-	ops->cursor(vc, info, mode, 0, get_color(vc, info, c, 1),
+	ops->cursor(vc, info, mode, get_color(vc, info, c, 1),
 		    get_color(vc, info, c, 0));
 }
 
diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h
index 20dea853765f5..78bb14c03643e 100644
--- a/drivers/video/fbdev/core/fbcon.h
+++ b/drivers/video/fbdev/core/fbcon.h
@@ -62,7 +62,7 @@ struct fbcon_ops {
 	void (*clear_margins)(struct vc_data *vc, struct fb_info *info,
 			      int color, int bottom_only);
 	void (*cursor)(struct vc_data *vc, struct fb_info *info, int mode,
-		       int softback_lines, int fg, int bg);
+		       int fg, int bg);
 	int  (*update_start)(struct fb_info *info);
 	int  (*rotate_font)(struct fb_info *info, struct vc_data *vc);
 	struct fb_var_screeninfo var;  /* copy of the current fb_var_screeninfo */
diff --git a/drivers/video/fbdev/core/fbcon_ccw.c b/drivers/video/fbdev/core/fbcon_ccw.c
index 5b177131e062d..bbd869efd03bc 100644
--- a/drivers/video/fbdev/core/fbcon_ccw.c
+++ b/drivers/video/fbdev/core/fbcon_ccw.c
@@ -219,7 +219,7 @@ static void ccw_clear_margins(struct vc_data *vc, struct fb_info *info,
 }
 
 static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
-		       int softback_lines, int fg, int bg)
+		       int fg, int bg)
 {
 	struct fb_cursor cursor;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -236,15 +236,6 @@ static void ccw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
 
 	cursor.set = 0;
 
-	if (softback_lines) {
-		if (y + softback_lines >= vc->vc_rows) {
-			mode = CM_ERASE;
-			ops->cursor_flash = 0;
-			return;
-		} else
-			y += softback_lines;
-	}
-
  	c = scr_readw((u16 *) vc->vc_pos);
 	attribute = get_attribute(info, c);
 	src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
diff --git a/drivers/video/fbdev/core/fbcon_cw.c b/drivers/video/fbdev/core/fbcon_cw.c
index 894d01a62f30d..a34cbe8e98744 100644
--- a/drivers/video/fbdev/core/fbcon_cw.c
+++ b/drivers/video/fbdev/core/fbcon_cw.c
@@ -202,7 +202,7 @@ static void cw_clear_margins(struct vc_data *vc, struct fb_info *info,
 }
 
 static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
-		      int softback_lines, int fg, int bg)
+		      int fg, int bg)
 {
 	struct fb_cursor cursor;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -219,15 +219,6 @@ static void cw_cursor(struct vc_data *vc, struct fb_info *info, int mode,
 
 	cursor.set = 0;
 
-	if (softback_lines) {
-		if (y + softback_lines >= vc->vc_rows) {
-			mode = CM_ERASE;
-			ops->cursor_flash = 0;
-			return;
-		} else
-			y += softback_lines;
-	}
-
  	c = scr_readw((u16 *) vc->vc_pos);
 	attribute = get_attribute(info, c);
 	src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.width));
diff --git a/drivers/video/fbdev/core/fbcon_ud.c b/drivers/video/fbdev/core/fbcon_ud.c
index 01b87f278d796..199cbc7abe353 100644
--- a/drivers/video/fbdev/core/fbcon_ud.c
+++ b/drivers/video/fbdev/core/fbcon_ud.c
@@ -249,7 +249,7 @@ static void ud_clear_margins(struct vc_data *vc, struct fb_info *info,
 }
 
 static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
-		      int softback_lines, int fg, int bg)
+		      int fg, int bg)
 {
 	struct fb_cursor cursor;
 	struct fbcon_ops *ops = info->fbcon_par;
@@ -267,15 +267,6 @@ static void ud_cursor(struct vc_data *vc, struct fb_info *info, int mode,
 
 	cursor.set = 0;
 
-	if (softback_lines) {
-		if (y + softback_lines >= vc->vc_rows) {
-			mode = CM_ERASE;
-			ops->cursor_flash = 0;
-			return;
-		} else
-			y += softback_lines;
-	}
-
  	c = scr_readw((u16 *) vc->vc_pos);
 	attribute = get_attribute(info, c);
 	src = ops->fontbuffer + ((c & charmask) * (w * vc->vc_font.height));
diff --git a/drivers/video/fbdev/core/tileblit.c b/drivers/video/fbdev/core/tileblit.c
index 1dfaff0881fb9..31b85b71cc377 100644
--- a/drivers/video/fbdev/core/tileblit.c
+++ b/drivers/video/fbdev/core/tileblit.c
@@ -80,7 +80,7 @@ static void tile_clear_margins(struct vc_data *vc, struct fb_info *info,
 }
 
 static void tile_cursor(struct vc_data *vc, struct fb_info *info, int mode,
-			int softback_lines, int fg, int bg)
+			int fg, int bg)
 {
 	struct fb_tilecursor cursor;
 	int use_sw = vc->vc_cursor_type & CUR_SW;
-- 
GitLab


From 973c096f6a85e5b5f2a295126ba6928d9a6afd45 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Wed, 9 Sep 2020 14:53:50 -0700
Subject: [PATCH 1212/1341] vgacon: remove software scrollback support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Yunhai Zhang recently fixed a VGA software scrollback bug in commit
ebfdfeeae8c0 ("vgacon: Fix for missing check in scrollback handling"),
but that then made people look more closely at some of this code, and
there were more problems on the vgacon side, but also the fbcon software
scrollback.

We don't really have anybody who maintains this code - probably because
nobody actually _uses_ it any more.  Sure, people still use both VGA and
the framebuffer consoles, but they are no longer the main user
interfaces to the kernel, and haven't been for decades, so these kinds
of extra features end up bitrotting and not really being used.

So rather than try to maintain a likely unused set of code, I'll just
aggressively remove it, and see if anybody even notices.  Maybe there
are people who haven't jumped on the whole GUI badnwagon yet, and think
it's just a fad.  And maybe those people use the scrollback code.

If that turns out to be the case, we can resurrect this again, once
we've found the sucker^Wmaintainer for it who actually uses it.

Reported-by: NopNop Nop <nopitydays@gmail.com>
Tested-by: Willy Tarreau <w@1wt.eu>
Cc: 张云海 <zhangyunhai@nsfocus.com>
Acked-by: Andy Lutomirski <luto@amacapital.net>
Acked-by: Willy Tarreau <w@1wt.eu>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 arch/powerpc/configs/pasemi_defconfig |   1 -
 arch/powerpc/configs/ppc6xx_defconfig |   1 -
 arch/x86/configs/i386_defconfig       |   1 -
 arch/x86/configs/x86_64_defconfig     |   1 -
 drivers/video/console/Kconfig         |  46 ------
 drivers/video/console/vgacon.c        | 221 +-------------------------
 6 files changed, 1 insertion(+), 270 deletions(-)

diff --git a/arch/powerpc/configs/pasemi_defconfig b/arch/powerpc/configs/pasemi_defconfig
index af9af03059e45..15ed8d0aa0146 100644
--- a/arch/powerpc/configs/pasemi_defconfig
+++ b/arch/powerpc/configs/pasemi_defconfig
@@ -108,7 +108,6 @@ CONFIG_FB_NVIDIA=y
 CONFIG_FB_NVIDIA_I2C=y
 CONFIG_FB_RADEON=y
 # CONFIG_LCD_CLASS_DEVICE is not set
-CONFIG_VGACON_SOFT_SCROLLBACK=y
 CONFIG_LOGO=y
 CONFIG_SOUND=y
 CONFIG_SND=y
diff --git a/arch/powerpc/configs/ppc6xx_defconfig b/arch/powerpc/configs/ppc6xx_defconfig
index 5e6f92ba3210e..66e9a0fd64ff2 100644
--- a/arch/powerpc/configs/ppc6xx_defconfig
+++ b/arch/powerpc/configs/ppc6xx_defconfig
@@ -743,7 +743,6 @@ CONFIG_FB_TRIDENT=m
 CONFIG_FB_SM501=m
 CONFIG_FB_IBM_GXT4500=y
 CONFIG_LCD_PLATFORM=m
-CONFIG_VGACON_SOFT_SCROLLBACK=y
 CONFIG_FRAMEBUFFER_CONSOLE=y
 CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y
 CONFIG_LOGO=y
diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
index d7577fece9eba..f556827dea580 100644
--- a/arch/x86/configs/i386_defconfig
+++ b/arch/x86/configs/i386_defconfig
@@ -186,7 +186,6 @@ CONFIG_DRM_I915=y
 CONFIG_FB_MODE_HELPERS=y
 CONFIG_FB_TILEBLITTING=y
 CONFIG_FB_EFI=y
-CONFIG_VGACON_SOFT_SCROLLBACK=y
 CONFIG_LOGO=y
 # CONFIG_LOGO_LINUX_MONO is not set
 # CONFIG_LOGO_LINUX_VGA16 is not set
diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig
index f856001437476..9936528e19393 100644
--- a/arch/x86/configs/x86_64_defconfig
+++ b/arch/x86/configs/x86_64_defconfig
@@ -181,7 +181,6 @@ CONFIG_DRM_I915=y
 CONFIG_FB_MODE_HELPERS=y
 CONFIG_FB_TILEBLITTING=y
 CONFIG_FB_EFI=y
-CONFIG_VGACON_SOFT_SCROLLBACK=y
 CONFIG_LOGO=y
 # CONFIG_LOGO_LINUX_MONO is not set
 # CONFIG_LOGO_LINUX_VGA16 is not set
diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig
index 5e850cc9f891d..39deb22a41807 100644
--- a/drivers/video/console/Kconfig
+++ b/drivers/video/console/Kconfig
@@ -22,52 +22,6 @@ config VGA_CONSOLE
 
 	  Say Y.
 
-config VGACON_SOFT_SCROLLBACK
-       bool "Enable Scrollback Buffer in System RAM"
-       depends on VGA_CONSOLE
-       default n
-       help
-	 The scrollback buffer of the standard VGA console is located in
-	 the VGA RAM.  The size of this RAM is fixed and is quite small.
-	 If you require a larger scrollback buffer, this can be placed in
-	 System RAM which is dynamically allocated during initialization.
-	 Placing the scrollback buffer in System RAM will slightly slow
-	 down the console.
-
-	 If you want this feature, say 'Y' here and enter the amount of
-	 RAM to allocate for this buffer.  If unsure, say 'N'.
-
-config VGACON_SOFT_SCROLLBACK_SIZE
-       int "Scrollback Buffer Size (in KB)"
-       depends on VGACON_SOFT_SCROLLBACK
-       range 1 1024
-       default "64"
-       help
-	  Enter the amount of System RAM to allocate for scrollback
-	  buffers of VGA consoles. Each 64KB will give you approximately
-	  16 80x25 screenfuls of scrollback buffer.
-
-config VGACON_SOFT_SCROLLBACK_PERSISTENT_ENABLE_BY_DEFAULT
-	bool "Persistent Scrollback History for each console by default"
-	depends on VGACON_SOFT_SCROLLBACK
-	default n
-	help
-	  Say Y here if the scrollback history should persist by default when
-	  switching between consoles. Otherwise, the scrollback history will be
-	  flushed each time the console is switched. This feature can also be
-	  enabled using the boot command line parameter
-	  'vgacon.scrollback_persistent=1'.
-
-	  This feature might break your tool of choice to flush the scrollback
-	  buffer, e.g. clear(1) will work fine but Debian's clear_console(1)
-	  will be broken, which might cause security issues.
-	  You can use the escape sequence \e[3J instead if this feature is
-	  activated.
-
-	  Note that a buffer of VGACON_SOFT_SCROLLBACK_SIZE is taken for each
-	  created tty device.
-	  So if you use a RAM-constrained system, say N here.
-
 config MDA_CONSOLE
 	depends on !M68K && !PARISC && ISA
 	tristate "MDA text console (dual-headed)"
diff --git a/drivers/video/console/vgacon.c b/drivers/video/console/vgacon.c
index a52bb37400734..17876f0179b57 100644
--- a/drivers/video/console/vgacon.c
+++ b/drivers/video/console/vgacon.c
@@ -165,214 +165,6 @@ static inline void vga_set_mem_top(struct vc_data *c)
 	write_vga(12, (c->vc_visible_origin - vga_vram_base) / 2);
 }
 
-#ifdef CONFIG_VGACON_SOFT_SCROLLBACK
-/* software scrollback */
-struct vgacon_scrollback_info {
-	void *data;
-	int tail;
-	int size;
-	int rows;
-	int cnt;
-	int cur;
-	int save;
-	int restore;
-};
-
-static struct vgacon_scrollback_info *vgacon_scrollback_cur;
-static struct vgacon_scrollback_info vgacon_scrollbacks[MAX_NR_CONSOLES];
-static bool scrollback_persistent = \
-	IS_ENABLED(CONFIG_VGACON_SOFT_SCROLLBACK_PERSISTENT_ENABLE_BY_DEFAULT);
-module_param_named(scrollback_persistent, scrollback_persistent, bool, 0000);
-MODULE_PARM_DESC(scrollback_persistent, "Enable persistent scrollback for all vga consoles");
-
-static void vgacon_scrollback_reset(int vc_num, size_t reset_size)
-{
-	struct vgacon_scrollback_info *scrollback = &vgacon_scrollbacks[vc_num];
-
-	if (scrollback->data && reset_size > 0)
-		memset(scrollback->data, 0, reset_size);
-
-	scrollback->cnt  = 0;
-	scrollback->tail = 0;
-	scrollback->cur  = 0;
-}
-
-static void vgacon_scrollback_init(int vc_num)
-{
-	int pitch = vga_video_num_columns * 2;
-	size_t size = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024;
-	int rows = size / pitch;
-	void *data;
-
-	data = kmalloc_array(CONFIG_VGACON_SOFT_SCROLLBACK_SIZE, 1024,
-			     GFP_NOWAIT);
-
-	vgacon_scrollbacks[vc_num].data = data;
-	vgacon_scrollback_cur = &vgacon_scrollbacks[vc_num];
-
-	vgacon_scrollback_cur->rows = rows - 1;
-	vgacon_scrollback_cur->size = rows * pitch;
-
-	vgacon_scrollback_reset(vc_num, size);
-}
-
-static void vgacon_scrollback_switch(int vc_num)
-{
-	if (!scrollback_persistent)
-		vc_num = 0;
-
-	if (!vgacon_scrollbacks[vc_num].data) {
-		vgacon_scrollback_init(vc_num);
-	} else {
-		if (scrollback_persistent) {
-			vgacon_scrollback_cur = &vgacon_scrollbacks[vc_num];
-		} else {
-			size_t size = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024;
-
-			vgacon_scrollback_reset(vc_num, size);
-		}
-	}
-}
-
-static void vgacon_scrollback_startup(void)
-{
-	vgacon_scrollback_cur = &vgacon_scrollbacks[0];
-	vgacon_scrollback_init(0);
-}
-
-static void vgacon_scrollback_update(struct vc_data *c, int t, int count)
-{
-	void *p;
-
-	if (!vgacon_scrollback_cur->data || !vgacon_scrollback_cur->size ||
-	    c->vc_num != fg_console)
-		return;
-
-	p = (void *) (c->vc_origin + t * c->vc_size_row);
-
-	while (count--) {
-		if ((vgacon_scrollback_cur->tail + c->vc_size_row) >
-		    vgacon_scrollback_cur->size)
-			vgacon_scrollback_cur->tail = 0;
-
-		scr_memcpyw(vgacon_scrollback_cur->data +
-			    vgacon_scrollback_cur->tail,
-			    p, c->vc_size_row);
-
-		vgacon_scrollback_cur->cnt++;
-		p += c->vc_size_row;
-		vgacon_scrollback_cur->tail += c->vc_size_row;
-
-		if (vgacon_scrollback_cur->tail >= vgacon_scrollback_cur->size)
-			vgacon_scrollback_cur->tail = 0;
-
-		if (vgacon_scrollback_cur->cnt > vgacon_scrollback_cur->rows)
-			vgacon_scrollback_cur->cnt = vgacon_scrollback_cur->rows;
-
-		vgacon_scrollback_cur->cur = vgacon_scrollback_cur->cnt;
-	}
-}
-
-static void vgacon_restore_screen(struct vc_data *c)
-{
-	c->vc_origin = c->vc_visible_origin;
-	vgacon_scrollback_cur->save = 0;
-
-	if (!vga_is_gfx && !vgacon_scrollback_cur->restore) {
-		scr_memcpyw((u16 *) c->vc_origin, (u16 *) c->vc_screenbuf,
-			    c->vc_screenbuf_size > vga_vram_size ?
-			    vga_vram_size : c->vc_screenbuf_size);
-		vgacon_scrollback_cur->restore = 1;
-		vgacon_scrollback_cur->cur = vgacon_scrollback_cur->cnt;
-	}
-}
-
-static void vgacon_scrolldelta(struct vc_data *c, int lines)
-{
-	int start, end, count, soff;
-
-	if (!lines) {
-		vgacon_restore_screen(c);
-		return;
-	}
-
-	if (!vgacon_scrollback_cur->data)
-		return;
-
-	if (!vgacon_scrollback_cur->save) {
-		vgacon_cursor(c, CM_ERASE);
-		vgacon_save_screen(c);
-		c->vc_origin = (unsigned long)c->vc_screenbuf;
-		vgacon_scrollback_cur->save = 1;
-	}
-
-	vgacon_scrollback_cur->restore = 0;
-	start = vgacon_scrollback_cur->cur + lines;
-	end = start + abs(lines);
-
-	if (start < 0)
-		start = 0;
-
-	if (start > vgacon_scrollback_cur->cnt)
-		start = vgacon_scrollback_cur->cnt;
-
-	if (end < 0)
-		end = 0;
-
-	if (end > vgacon_scrollback_cur->cnt)
-		end = vgacon_scrollback_cur->cnt;
-
-	vgacon_scrollback_cur->cur = start;
-	count = end - start;
-	soff = vgacon_scrollback_cur->tail -
-		((vgacon_scrollback_cur->cnt - end) * c->vc_size_row);
-	soff -= count * c->vc_size_row;
-
-	if (soff < 0)
-		soff += vgacon_scrollback_cur->size;
-
-	count = vgacon_scrollback_cur->cnt - start;
-
-	if (count > c->vc_rows)
-		count = c->vc_rows;
-
-	if (count) {
-		int copysize;
-
-		int diff = c->vc_rows - count;
-		void *d = (void *) c->vc_visible_origin;
-		void *s = (void *) c->vc_screenbuf;
-
-		count *= c->vc_size_row;
-		/* how much memory to end of buffer left? */
-		copysize = min(count, vgacon_scrollback_cur->size - soff);
-		scr_memcpyw(d, vgacon_scrollback_cur->data + soff, copysize);
-		d += copysize;
-		count -= copysize;
-
-		if (count) {
-			scr_memcpyw(d, vgacon_scrollback_cur->data, count);
-			d += count;
-		}
-
-		if (diff)
-			scr_memcpyw(d, s, diff * c->vc_size_row);
-	} else
-		vgacon_cursor(c, CM_MOVE);
-}
-
-static void vgacon_flush_scrollback(struct vc_data *c)
-{
-	size_t size = CONFIG_VGACON_SOFT_SCROLLBACK_SIZE * 1024;
-
-	vgacon_scrollback_reset(c->vc_num, size);
-}
-#else
-#define vgacon_scrollback_startup(...) do { } while (0)
-#define vgacon_scrollback_init(...)    do { } while (0)
-#define vgacon_scrollback_update(...)  do { } while (0)
-#define vgacon_scrollback_switch(...)  do { } while (0)
-
 static void vgacon_restore_screen(struct vc_data *c)
 {
 	if (c->vc_origin != c->vc_visible_origin)
@@ -386,11 +178,6 @@ static void vgacon_scrolldelta(struct vc_data *c, int lines)
 	vga_set_mem_top(c);
 }
 
-static void vgacon_flush_scrollback(struct vc_data *c)
-{
-}
-#endif /* CONFIG_VGACON_SOFT_SCROLLBACK */
-
 static const char *vgacon_startup(void)
 {
 	const char *display_desc = NULL;
@@ -573,10 +360,7 @@ static const char *vgacon_startup(void)
 	vgacon_xres = screen_info.orig_video_cols * VGA_FONTWIDTH;
 	vgacon_yres = vga_scan_lines;
 
-	if (!vga_init_done) {
-		vgacon_scrollback_startup();
-		vga_init_done = true;
-	}
+	vga_init_done = true;
 
 	return display_desc;
 }
@@ -869,7 +653,6 @@ static int vgacon_switch(struct vc_data *c)
 			vgacon_doresize(c, c->vc_cols, c->vc_rows);
 	}
 
-	vgacon_scrollback_switch(c->vc_num);
 	return 0;		/* Redrawing not needed */
 }
 
@@ -1386,7 +1169,6 @@ static bool vgacon_scroll(struct vc_data *c, unsigned int t, unsigned int b,
 	oldo = c->vc_origin;
 	delta = lines * c->vc_size_row;
 	if (dir == SM_UP) {
-		vgacon_scrollback_update(c, t, lines);
 		if (c->vc_scr_end + delta >= vga_vram_end) {
 			scr_memcpyw((u16 *) vga_vram_base,
 				    (u16 *) (oldo + delta),
@@ -1450,7 +1232,6 @@ const struct consw vga_con = {
 	.con_save_screen = vgacon_save_screen,
 	.con_build_attr = vgacon_build_attr,
 	.con_invert_region = vgacon_invert_region,
-	.con_flush_scrollback = vgacon_flush_scrollback,
 };
 EXPORT_SYMBOL(vga_con);
 
-- 
GitLab


From 6c77545af100a72bf5e28142b510ba042a17648d Mon Sep 17 00:00:00 2001
From: Vincent Huang <vincent.huang@tw.synaptics.com>
Date: Mon, 14 Sep 2020 12:19:08 -0700
Subject: [PATCH 1213/1341] Input: trackpoint - add new trackpoint variant IDs

Add trackpoint variant IDs to allow supported control on Synaptics
trackpoints.

Signed-off-by: Vincent Huang <vincent.huang@tw.synaptics.com>
Link: https://lore.kernel.org/r/20200914120327.2592-1-vincent.huang@tw.synaptics.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
---
 drivers/input/mouse/trackpoint.c | 10 ++++++----
 drivers/input/mouse/trackpoint.h | 10 ++++++----
 2 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/drivers/input/mouse/trackpoint.c b/drivers/input/mouse/trackpoint.c
index 3eefee2ee2a12..854d5e7587241 100644
--- a/drivers/input/mouse/trackpoint.c
+++ b/drivers/input/mouse/trackpoint.c
@@ -17,10 +17,12 @@
 #include "trackpoint.h"
 
 static const char * const trackpoint_variants[] = {
-	[TP_VARIANT_IBM]	= "IBM",
-	[TP_VARIANT_ALPS]	= "ALPS",
-	[TP_VARIANT_ELAN]	= "Elan",
-	[TP_VARIANT_NXP]	= "NXP",
+	[TP_VARIANT_IBM]		= "IBM",
+	[TP_VARIANT_ALPS]		= "ALPS",
+	[TP_VARIANT_ELAN]		= "Elan",
+	[TP_VARIANT_NXP]		= "NXP",
+	[TP_VARIANT_JYT_SYNAPTICS]	= "JYT_Synaptics",
+	[TP_VARIANT_SYNAPTICS]		= "Synaptics",
 };
 
 /*
diff --git a/drivers/input/mouse/trackpoint.h b/drivers/input/mouse/trackpoint.h
index 5cb93ed260856..eb5412904fe07 100644
--- a/drivers/input/mouse/trackpoint.h
+++ b/drivers/input/mouse/trackpoint.h
@@ -24,10 +24,12 @@
  * 0x01 was the original IBM trackpoint, others implement very limited
  * subset of trackpoint features.
  */
-#define TP_VARIANT_IBM		0x01
-#define TP_VARIANT_ALPS		0x02
-#define TP_VARIANT_ELAN		0x03
-#define TP_VARIANT_NXP		0x04
+#define TP_VARIANT_IBM			0x01
+#define TP_VARIANT_ALPS			0x02
+#define TP_VARIANT_ELAN			0x03
+#define TP_VARIANT_NXP			0x04
+#define TP_VARIANT_JYT_SYNAPTICS	0x05
+#define TP_VARIANT_SYNAPTICS		0x06
 
 /*
  * Commands
-- 
GitLab


From b6ec413461034d49f9e586845825adb35ba308f6 Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Fri, 11 Sep 2020 17:58:26 -0700
Subject: [PATCH 1214/1341] core/entry: Report syscall correctly for trace and
 audit

On v5.8 when doing seccomp syscall rewrites (e.g. getpid into getppid
as seen in the seccomp selftests), trace (and audit) correctly see the
rewritten syscall on entry and exit:

	seccomp_bpf-1307  [000] .... 22974.874393: sys_enter: NR 110 (...
	seccomp_bpf-1307  [000] .N.. 22974.874401: sys_exit: NR 110 = 1304

With mainline we see a mismatched enter and exit (the original syscall
is incorrectly visible on entry):

	seccomp_bpf-1030  [000] ....    21.806766: sys_enter: NR 39 (...
	seccomp_bpf-1030  [000] ....    21.806767: sys_exit: NR 110 = 1027

When ptrace or seccomp change the syscall, this needs to be visible to
trace and audit at that time as well. Update the syscall earlier so they
see the correct value.

Fixes: d88d59b64ca3 ("core/entry: Respect syscall number rewrites")
Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20200912005826.586171-1-keescook@chromium.org
---
 kernel/entry/common.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/entry/common.c b/kernel/entry/common.c
index 18683598edbc6..6fdb6105e6d61 100644
--- a/kernel/entry/common.c
+++ b/kernel/entry/common.c
@@ -60,13 +60,15 @@ static long syscall_trace_enter(struct pt_regs *regs, long syscall,
 			return ret;
 	}
 
+	/* Either of the above might have changed the syscall number */
+	syscall = syscall_get_nr(current, regs);
+
 	if (unlikely(ti_work & _TIF_SYSCALL_TRACEPOINT))
 		trace_sys_enter(regs, syscall);
 
 	syscall_enter_audit(regs, syscall);
 
-	/* The above might have changed the syscall number */
-	return ret ? : syscall_get_nr(current, regs);
+	return ret ? : syscall;
 }
 
 static __always_inline long
-- 
GitLab


From 8a39e8c4d9baf65d88f66d49ac684df381e30055 Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@kernel.org>
Date: Fri, 11 Sep 2020 15:00:05 +0200
Subject: [PATCH 1215/1341] perf test: Fix the "signal" test inline assembly

When compiling with DEBUG=1 on Fedora 32 I'm getting crash for 'perf
test signal':

  Program received signal SIGSEGV, Segmentation fault.
  0x0000000000c68548 in __test_function ()
  (gdb) bt
  #0  0x0000000000c68548 in __test_function ()
  #1  0x00000000004d62e9 in test_function () at tests/bp_signal.c:61
  #2  0x00000000004d689a in test__bp_signal (test=0xa8e280 <generic_ ...
  #3  0x00000000004b7d49 in run_test (test=0xa8e280 <generic_tests+1 ...
  #4  0x00000000004b7e7f in test_and_print (t=0xa8e280 <generic_test ...
  #5  0x00000000004b8927 in __cmd_test (argc=1, argv=0x7fffffffdce0, ...
  ...

It's caused by the symbol __test_function being in the ".bss" section:

  $ readelf -a ./perf | less
    [Nr] Name              Type             Address           Offset
         Size              EntSize          Flags  Link  Info  Align
    ...
    [28] .bss              NOBITS           0000000000c356a0  008346a0
         00000000000511f8  0000000000000000  WA       0     0     32

  $ nm perf | grep __test_function
  0000000000c68548 B __test_function

I guess most of the time we're just lucky the inline asm ended up in the
".text" section, so making it specific explicit with push and pop
section clauses.

  $ readelf -a ./perf | less
    [Nr] Name              Type             Address           Offset
         Size              EntSize          Flags  Link  Info  Align
    ...
    [13] .text             PROGBITS         0000000000431240  00031240
         0000000000306faa  0000000000000000  AX       0     0     16

  $ nm perf | grep __test_function
  00000000004d62c8 T __test_function

Committer testing:

  $ readelf -wi ~/bin/perf | grep producer -m1
    <c>   DW_AT_producer    : (indirect string, offset: 0x254a): GNU C99 10.2.1 20200723 (Red Hat 10.2.1-1) -mtune=generic -march=x86-64 -ggdb3 -std=gnu99 -fno-omit-frame-pointer -funwind-tables -fstack-protector-all
                                                                                                                                         ^^^^^
                                                                                                                                         ^^^^^
                                                                                                                                         ^^^^^
  $

Before:

  $ perf test signal
  20: Breakpoint overflow signal handler                    : FAILED!
  $

After:

  $ perf test signal
  20: Breakpoint overflow signal handler                    : Ok
  $

Fixes: 8fd34e1cce18 ("perf test: Improve bp_signal")
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lore.kernel.org/lkml/20200911130005.1842138-1-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/bp_signal.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/bp_signal.c b/tools/perf/tests/bp_signal.c
index da8ec1e8e0648..cc9fbcedb3646 100644
--- a/tools/perf/tests/bp_signal.c
+++ b/tools/perf/tests/bp_signal.c
@@ -45,10 +45,13 @@ volatile long the_var;
 #if defined (__x86_64__)
 extern void __test_function(volatile long *ptr);
 asm (
+	".pushsection .text;"
 	".globl __test_function\n"
+	".type __test_function, @function;"
 	"__test_function:\n"
 	"incq (%rdi)\n"
-	"ret\n");
+	"ret\n"
+	".popsection\n");
 #else
 static void __test_function(volatile long *ptr)
 {
-- 
GitLab


From d2c73501a767514b6c85c7feff9457a165d51057 Mon Sep 17 00:00:00 2001
From: Ian Rogers <irogers@google.com>
Date: Fri, 11 Sep 2020 22:37:25 -0700
Subject: [PATCH 1216/1341] perf bench: Fix 2 memory sanitizer warnings

Memory sanitizer warns if a write is performed where the memory being
read for the write is uninitialized. Avoid this warning by initializing
the memory.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200912053725.1405857-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/bench/sched-messaging.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/bench/sched-messaging.c b/tools/perf/bench/sched-messaging.c
index 71d830d7b9231..cecce93ccc636 100644
--- a/tools/perf/bench/sched-messaging.c
+++ b/tools/perf/bench/sched-messaging.c
@@ -66,11 +66,10 @@ static void fdpair(int fds[2])
 /* Block until we're ready to go */
 static void ready(int ready_out, int wakefd)
 {
-	char dummy;
 	struct pollfd pollfd = { .fd = wakefd, .events = POLLIN };
 
 	/* Tell them we're ready. */
-	if (write(ready_out, &dummy, 1) != 1)
+	if (write(ready_out, "R", 1) != 1)
 		err(EXIT_FAILURE, "CLIENT: ready write");
 
 	/* Wait for "GO" signal */
@@ -85,6 +84,7 @@ static void *sender(struct sender_context *ctx)
 	unsigned int i, j;
 
 	ready(ctx->ready_out, ctx->wakefd);
+	memset(data, 'S', sizeof(data));
 
 	/* Now pump to every receiver. */
 	for (i = 0; i < nr_loops; i++) {
-- 
GitLab


From ce4326d2752fd51726be50e94b750d3f74670ae3 Mon Sep 17 00:00:00 2001
From: David Sharp <dhsharp@google.com>
Date: Fri, 11 Sep 2020 19:56:52 -0700
Subject: [PATCH 1217/1341] perf record: Set PERF_RECORD_PERIOD if attr->freq
 is set.

evsel__config() would only set PERF_RECORD_PERIOD if it set attr->freq
from perf record options. When it is set by libpfm events, it would not
get set. This changes evsel__config to see if attr->freq is set outside
of whether or not it changes attr->freq itself.

Signed-off-by: David Sharp <dhsharp@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Ian Rogers <irogers@google.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yonghong Song <yhs@fb.com>
Cc: david sharp <dhsharp@google.com>
Link: http://lore.kernel.org/lkml/20200912025655.1337192-2-irogers@google.com
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evsel.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index fd865002cbbd4..3e985016da7e0 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -979,13 +979,18 @@ void evsel__config(struct evsel *evsel, struct record_opts *opts,
 	if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
 				     opts->user_interval != ULLONG_MAX)) {
 		if (opts->freq) {
-			evsel__set_sample_bit(evsel, PERIOD);
 			attr->freq		= 1;
 			attr->sample_freq	= opts->freq;
 		} else {
 			attr->sample_period = opts->default_interval;
 		}
 	}
+	/*
+	 * If attr->freq was set (here or earlier), ask for period
+	 * to be sampled.
+	 */
+	if (attr->freq)
+		evsel__set_sample_bit(evsel, PERIOD);
 
 	if (opts->no_samples)
 		attr->sample_freq = 0;
-- 
GitLab


From ae5dcc8abe311ceafd8753fb488e38c4f5e8e699 Mon Sep 17 00:00:00 2001
From: Stephane Eranian <eranian@google.com>
Date: Fri, 11 Sep 2020 19:56:53 -0700
Subject: [PATCH 1218/1341] perf record: Prevent override of
 attr->sample_period for libpfm4 events

Before:

  $ perf record -c 10000 --pfm-events=cycles:period=77777

Would yield a cycles event with period=10000, instead of 77777.

the event string and perf record initializing the event.
This was due to an ordering issue between libpfm4 parsing

events with attr->sample_period != 0 by the time
intent of the author.
perf_evsel__config() is invoked. This seems to have been the
This patch fixes the problem by preventing override for

Signed-off-by: Stephane Eranian <eranian@google.com>
Reviewed-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Yonghong Song <yhs@fb.com>
Link: http://lore.kernel.org/lkml/20200912025655.1337192-3-irogers@google.com
Signed-off-by: Ian Rogers <irogers@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evsel.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 3e985016da7e0..459b51e900636 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -976,8 +976,7 @@ void evsel__config(struct evsel *evsel, struct record_opts *opts,
 	 * We default some events to have a default interval. But keep
 	 * it a weak assumption overridable by the user.
 	 */
-	if (!attr->sample_period || (opts->user_freq != UINT_MAX ||
-				     opts->user_interval != ULLONG_MAX)) {
+	if (!attr->sample_period) {
 		if (opts->freq) {
 			attr->freq		= 1;
 			attr->sample_freq	= opts->freq;
-- 
GitLab


From 8d761d2ccc3d41107b7805383a0baeeff05e91c9 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Mon, 14 Sep 2020 19:02:18 -0300
Subject: [PATCH 1219/1341] tools headers UAPI: Sync kvm.h headers with the
 kernel sources

To pick the changes in:

  15e9e35cd1dec2bc ("KVM: MIPS: Change the definition of kvm type")
  004a01241c5a0d37 ("arm64/x86: KVM: Introduce steal-time cap")

That do not result in any change in tooling, as the additions are not
being used in any table generator.

This silences these perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
  diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andrew Jones <drjones@redhat.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/include/uapi/linux/kvm.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/include/uapi/linux/kvm.h b/tools/include/uapi/linux/kvm.h
index f6d86033c4fa3..7d8eced6f459b 100644
--- a/tools/include/uapi/linux/kvm.h
+++ b/tools/include/uapi/linux/kvm.h
@@ -790,9 +790,10 @@ struct kvm_ppc_resize_hpt {
 #define KVM_VM_PPC_HV 1
 #define KVM_VM_PPC_PR 2
 
-/* on MIPS, 0 forces trap & emulate, 1 forces VZ ASE */
-#define KVM_VM_MIPS_TE		0
+/* on MIPS, 0 indicates auto, 1 forces VZ ASE, 2 forces trap & emulate */
+#define KVM_VM_MIPS_AUTO	0
 #define KVM_VM_MIPS_VZ		1
+#define KVM_VM_MIPS_TE		2
 
 #define KVM_S390_SIE_PAGE_OFFSET 1
 
@@ -1035,6 +1036,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_LAST_CPU 184
 #define KVM_CAP_SMALLER_MAXPHYADDR 185
 #define KVM_CAP_S390_DIAG318 186
+#define KVM_CAP_STEAL_TIME 187
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
-- 
GitLab


From 2fa3fc9579c9f7682d832cd1dfdc56f46f4d2b67 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Mon, 14 Sep 2020 19:06:41 -0300
Subject: [PATCH 1220/1341] tools headers UAPI: update linux/in.h copy

To get the changes from:

  645f08975f49441b ("net: Fix some comments")

That don't cause any changes in tooling, its just a typo fix.

This silences this tools/perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/in.h' differs from latest version at 'include/uapi/linux/in.h'
  diff -u tools/include/uapi/linux/in.h include/uapi/linux/in.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/include/uapi/linux/in.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/include/uapi/linux/in.h b/tools/include/uapi/linux/in.h
index 3d0d8231dc196..7d6687618d808 100644
--- a/tools/include/uapi/linux/in.h
+++ b/tools/include/uapi/linux/in.h
@@ -135,7 +135,7 @@ struct in_addr {
  * this socket to prevent accepting spoofed ones.
  */
 #define IP_PMTUDISC_INTERFACE		4
-/* weaker version of IP_PMTUDISC_INTERFACE, which allos packets to get
+/* weaker version of IP_PMTUDISC_INTERFACE, which allows packets to get
  * fragmented if they exeed the interface mtu
  */
 #define IP_PMTUDISC_OMIT		5
-- 
GitLab


From 3b0a18c1aa6cbfa7b0dd513b6be9893ef6e6ac30 Mon Sep 17 00:00:00 2001
From: Ian Rogers <irogers@google.com>
Date: Fri, 11 Sep 2020 19:56:54 -0700
Subject: [PATCH 1221/1341] perf record: Don't clear event's period if set by a
 term

If events in a group explicitly set a frequency or period with leader
sampling, don't disable the samples on those events.

Prior to 5.8:

  perf record -e '{cycles/period=12345000/,instructions/period=6789000/}:S'

would clear the attributes then apply the config terms. In commit
5f34278867b7 leader sampling configuration was moved to after applying the
config terms, in the example, making the instructions' event have its period
cleared.

This change makes it so that sampling is only disabled if configuration
terms aren't present.

Committer testing:

Before:

  # perf record -e '{cycles/period=1/,instructions/period=2/}:S' sleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.051 MB perf.data (6 samples) ]
  #
  # perf evlist -v
  cycles/period=1/: size: 120, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|READ|ID, read_format: ID|GROUP, disabled: 1, mmap: 1, comm: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1
  instructions/period=2/: size: 120, config: 0x1, sample_type: IP|TID|TIME|READ|ID, read_format: ID|GROUP, sample_id_all: 1, exclude_guest: 1
  #

After:

  # perf record -e '{cycles/period=1/,instructions/period=2/}:S' sleep 0.0001
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.052 MB perf.data (4 samples) ]
  # perf evlist -v
  cycles/period=1/: size: 120, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|READ|ID, read_format: ID|GROUP, disabled: 1, mmap: 1, comm: 1, enable_on_exec: 1, task: 1, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1
  instructions/period=2/: size: 120, config: 0x1, { sample_period, sample_freq }: 2, sample_type: IP|TID|TIME|READ|ID, read_format: ID|GROUP, sample_id_all: 1, exclude_guest: 1
  #

Fixes: 5f34278867b7 ("perf evlist: Move leader-sampling configuration")
Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yonghong Song <yhs@fb.com>
Link: http://lore.kernel.org/lkml/20200912025655.1337192-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/record.c | 34 ++++++++++++++++++++++++++--------
 1 file changed, 26 insertions(+), 8 deletions(-)

diff --git a/tools/perf/util/record.c b/tools/perf/util/record.c
index a4cc11592f6b3..ea9aa1d7cf501 100644
--- a/tools/perf/util/record.c
+++ b/tools/perf/util/record.c
@@ -2,6 +2,7 @@
 #include "debug.h"
 #include "evlist.h"
 #include "evsel.h"
+#include "evsel_config.h"
 #include "parse-events.h"
 #include <errno.h>
 #include <limits.h>
@@ -33,11 +34,24 @@ static struct evsel *evsel__read_sampler(struct evsel *evsel, struct evlist *evl
 	return leader;
 }
 
+static u64 evsel__config_term_mask(struct evsel *evsel)
+{
+	struct evsel_config_term *term;
+	struct list_head *config_terms = &evsel->config_terms;
+	u64 term_types = 0;
+
+	list_for_each_entry(term, config_terms, list) {
+		term_types |= 1 << term->type;
+	}
+	return term_types;
+}
+
 static void evsel__config_leader_sampling(struct evsel *evsel, struct evlist *evlist)
 {
 	struct perf_event_attr *attr = &evsel->core.attr;
 	struct evsel *leader = evsel->leader;
 	struct evsel *read_sampler;
+	u64 term_types, freq_mask;
 
 	if (!leader->sample_read)
 		return;
@@ -47,16 +61,20 @@ static void evsel__config_leader_sampling(struct evsel *evsel, struct evlist *ev
 	if (evsel == read_sampler)
 		return;
 
+	term_types = evsel__config_term_mask(evsel);
 	/*
-	 * Disable sampling for all group members other than the leader in
-	 * case the leader 'leads' the sampling, except when the leader is an
-	 * AUX area event, in which case the 2nd event in the group is the one
-	 * that 'leads' the sampling.
+	 * Disable sampling for all group members except those with explicit
+	 * config terms or the leader. In the case of an AUX area event, the 2nd
+	 * event in the group is the one that 'leads' the sampling.
 	 */
-	attr->freq           = 0;
-	attr->sample_freq    = 0;
-	attr->sample_period  = 0;
-	attr->write_backward = 0;
+	freq_mask = (1 << EVSEL__CONFIG_TERM_FREQ) | (1 << EVSEL__CONFIG_TERM_PERIOD);
+	if ((term_types & freq_mask) == 0) {
+		attr->freq           = 0;
+		attr->sample_freq    = 0;
+		attr->sample_period  = 0;
+	}
+	if ((term_types & (1 << EVSEL__CONFIG_TERM_OVERWRITE)) == 0)
+		attr->write_backward = 0;
 
 	/*
 	 * We don't get a sample for slave events, we make them when delivering
-- 
GitLab


From 880a784344fb8a7c498a1145fb541fe8e8d2040f Mon Sep 17 00:00:00 2001
From: Ian Rogers <irogers@google.com>
Date: Fri, 11 Sep 2020 19:56:55 -0700
Subject: [PATCH 1222/1341] perf test: Leader sampling shouldn't clear sample
 period

Add test that a sibling with leader sampling doesn't have its period
cleared.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@chromium.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yonghong Song <yhs@fb.com>
Cc: bpf@vger.kernel.org
Cc: netdev@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200912025655.1337192-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/attr/README             |  1 +
 tools/perf/tests/attr/test-record-group2 | 29 ++++++++++++++++++++++++
 2 files changed, 30 insertions(+)
 create mode 100644 tools/perf/tests/attr/test-record-group2

diff --git a/tools/perf/tests/attr/README b/tools/perf/tests/attr/README
index 6cd4081085955..a36f49fb4dbea 100644
--- a/tools/perf/tests/attr/README
+++ b/tools/perf/tests/attr/README
@@ -49,6 +49,7 @@ Following tests are defined (with perf commands):
   perf record --call-graph fp kill              (test-record-graph-fp)
   perf record --group -e cycles,instructions kill (test-record-group)
   perf record -e '{cycles,instructions}' kill   (test-record-group1)
+  perf record -e '{cycles/period=1/,instructions/period=2/}:S' kill (test-record-group2)
   perf record -D kill                           (test-record-no-delay)
   perf record -i kill                           (test-record-no-inherit)
   perf record -n kill                           (test-record-no-samples)
diff --git a/tools/perf/tests/attr/test-record-group2 b/tools/perf/tests/attr/test-record-group2
new file mode 100644
index 0000000000000..6b9f8d182ce10
--- /dev/null
+++ b/tools/perf/tests/attr/test-record-group2
@@ -0,0 +1,29 @@
+[config]
+command = record
+args    = --no-bpf-event -e '{cycles/period=1234000/,instructions/period=6789000/}:S' kill >/dev/null 2>&1
+ret     = 1
+
+[event-1:base-record]
+fd=1
+group_fd=-1
+config=0|1
+sample_period=1234000
+sample_type=87
+read_format=12
+inherit=0
+freq=0
+
+[event-2:base-record]
+fd=2
+group_fd=1
+config=0|1
+sample_period=6789000
+sample_type=87
+read_format=12
+disabled=0
+inherit=0
+mmap=0
+comm=0
+freq=0
+enable_on_exec=0
+task=0
-- 
GitLab


From cd8100f1f3be406a4e0e122e7307ac0fca6d57cc Mon Sep 17 00:00:00 2001
From: Borislav Petkov <bp@suse.de>
Date: Fri, 11 Sep 2020 12:55:55 +0200
Subject: [PATCH 1223/1341] EDAC/ghes: Clear scanned data on unload

Commit

  b972fdba8665 ("EDAC/ghes: Fix NULL pointer dereference in ghes_edac_register()")

didn't clear all the information from the scanned system and, more
specifically, left ghes_hw.num_dimms to its previous value. On a
second load (CONFIG_DEBUG_TEST_DRIVER_REMOVE=y), the driver would use
the leftover num_dimms value which is not 0 and thus the 0 check in
enumerate_dimms() will get bypassed and it would go directly to the
pointer deref:

  d = &hw->dimms[hw->num_dimms];

which is, of course, NULL:

  #PF: supervisor write access in kernel mode
  #PF: error_code(0x0002) - not-present page
  PGD 0 P4D 0
  Oops: 0002 [#1] PREEMPT SMP
  CPU: 7 PID: 1 Comm: swapper/0 Not tainted 5.9.0-rc4+ #7
  Hardware name: GIGABYTE MZ01-CE1-00/MZ01-CE1-00, BIOS F02 08/29/2018
  RIP: 0010:enumerate_dimms.cold+0x7b/0x375

Reset the whole ghes_hw on driver unregister so that no stale values are
used on a second system scan.

Fixes: b972fdba8665 ("EDAC/ghes: Fix NULL pointer dereference in ghes_edac_register()")
Cc: Shiju Jose <shiju.jose@huawei.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200911164817.GA19320@zn.tnic
---
 drivers/edac/ghes_edac.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index 54ebc8afc6b1b..bf7fb9f3e1172 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -632,6 +632,7 @@ void ghes_edac_unregister(struct ghes *ghes)
 	mutex_lock(&ghes_reg_mutex);
 
 	system_scanned = false;
+	memset(&ghes_hw, 0, sizeof(struct ghes_hw_desc));
 
 	if (!refcount_dec_and_test(&ghes_refcount))
 		goto unlock;
-- 
GitLab


From 251c54ea26fa6029b01a76161a37a12fde5124e4 Mon Sep 17 00:00:00 2001
From: Borislav Petkov <bp@suse.de>
Date: Fri, 11 Sep 2020 18:17:30 +0200
Subject: [PATCH 1224/1341] EDAC/ghes: Check whether the driver is on the safe
 list correctly

With CONFIG_DEBUG_TEST_DRIVER_REMOVE=y, a system would try to probe,
unregister and probe again a driver.

When ghes_edac is attempted to be loaded on a system which is not on
the safe platforms list, ghes_edac_register() would return early. The
unregister counterpart ghes_edac_unregister() would still attempt to
unregister and exit early at the refcount test, leading to the refcount
underflow below.

In order to not do *anything* on the unregister path too, reuse the
force_load parameter and check it on that path too, before fumbling with
the refcount.

  ghes_edac: ghes_edac_register: entry
  ghes_edac: ghes_edac_register: return -ENODEV
  ------------[ cut here ]------------
  refcount_t: underflow; use-after-free.
  WARNING: CPU: 10 PID: 1 at lib/refcount.c:28 refcount_warn_saturate+0xb9/0x100
  Modules linked in:
  CPU: 10 PID: 1 Comm: swapper/0 Not tainted 5.9.0-rc4+ #12
  Hardware name: GIGABYTE MZ01-CE1-00/MZ01-CE1-00, BIOS F02 08/29/2018
  RIP: 0010:refcount_warn_saturate+0xb9/0x100
  Code: 82 e8 fb 8f 4d 00 90 0f 0b 90 90 c3 80 3d 55 4c f5 00 00 75 88 c6 05 4c 4c f5 00 01 90 48 c7 c7 d0 8a 10 82 e8 d8 8f 4d 00 90 <0f> 0b 90 90 c3 80 3d 30 4c f5 00 00 0f 85 61 ff ff ff c6 05 23 4c
  RSP: 0018:ffffc90000037d58 EFLAGS: 00010292
  RAX: 0000000000000026 RBX: ffff88840b8da000 RCX: 0000000000000000
  RDX: 0000000000000001 RSI: ffffffff8216b24f RDI: 00000000ffffffff
  RBP: ffff88840c662e00 R08: 0000000000000001 R09: 0000000000000001
  R10: 0000000000000001 R11: 0000000000000046 R12: 0000000000000000
  R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000000
  FS:  0000000000000000(0000) GS:ffff88840ee80000(0000) knlGS:0000000000000000
  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  CR2: 0000000000000000 CR3: 0000800002211000 CR4: 00000000003506e0
  Call Trace:
   ghes_edac_unregister
   ghes_remove
   platform_drv_remove
   really_probe
   driver_probe_device
   device_driver_attach
   __driver_attach
   ? device_driver_attach
   ? device_driver_attach
   bus_for_each_dev
   bus_add_driver
   driver_register
   ? bert_init
   ghes_init
   do_one_initcall
   ? rcu_read_lock_sched_held
   kernel_init_freeable
   ? rest_init
   kernel_init
   ret_from_fork
   ...
  ghes_edac: ghes_edac_unregister: FALSE, refcount: -1073741824

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200911164950.GB19320@zn.tnic
---
 drivers/edac/ghes_edac.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index bf7fb9f3e1172..94d1e31650527 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -508,6 +508,7 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
 		if (!force_load && idx < 0)
 			return -ENODEV;
 	} else {
+		force_load = true;
 		idx = 0;
 	}
 
@@ -629,6 +630,9 @@ void ghes_edac_unregister(struct ghes *ghes)
 	struct mem_ctl_info *mci;
 	unsigned long flags;
 
+	if (!force_load)
+		return;
+
 	mutex_lock(&ghes_reg_mutex);
 
 	system_scanned = false;
-- 
GitLab


From 564c836fd945a94b5dd46597d6b7adb464092650 Mon Sep 17 00:00:00 2001
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: Mon, 14 Sep 2020 18:05:00 +0200
Subject: [PATCH 1225/1341] MIPS: SNI: Fix MIPS_L1_CACHE_SHIFT

Commit 930beb5ac09a ("MIPS: introduce MIPS_L1_CACHE_SHIFT_<N>") forgot
to select the correct MIPS_L1_CACHE_SHIFT for SNI RM. This breaks non
coherent DMA because of a wrong allocation alignment.

Fixes: 930beb5ac09a ("MIPS: introduce MIPS_L1_CACHE_SHIFT_<N>")
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index c95fa3a2484cf..8f328298f8cc8 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -877,6 +877,7 @@ config SNI_RM
 	select I8253
 	select I8259
 	select ISA
+	select MIPS_L1_CACHE_SHIFT_6
 	select SWAP_IO_SPACE if CPU_BIG_ENDIAN
 	select SYS_HAS_CPU_R4X00
 	select SYS_HAS_CPU_R5000
-- 
GitLab


From 56f3a1cdafc25c5f78e4267ba9e2f341da3eec16 Mon Sep 17 00:00:00 2001
From: Henry Burns <henrywolfeburns@gmail.com>
Date: Mon, 14 Sep 2020 20:40:49 -0400
Subject: [PATCH 1226/1341] perf vendor events amd: Remove trailing commas

The amdzen2/core.json and amdzen/core.json vendor events files have the
occasional trailing comma. Since that goes against the JSON standard,
lets remove it.

Signed-off-by: Henry Burns <henrywolfeburns@gmail.com>
Acked-by: Kim Phillips <kim.phillips@amd.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vijay Thakkar <vijaythakkar@me.com>
Link: http://lore.kernel.org/lkml/20200915004125.971-1-henrywolfeburns@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/pmu-events/arch/x86/amdzen1/core.json | 2 +-
 tools/perf/pmu-events/arch/x86/amdzen2/core.json | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/pmu-events/arch/x86/amdzen1/core.json b/tools/perf/pmu-events/arch/x86/amdzen1/core.json
index 7e1aa8273935c..653b11b233992 100644
--- a/tools/perf/pmu-events/arch/x86/amdzen1/core.json
+++ b/tools/perf/pmu-events/arch/x86/amdzen1/core.json
@@ -61,7 +61,7 @@
   {
     "EventName": "ex_ret_brn_ind_misp",
     "EventCode": "0xca",
-    "BriefDescription": "Retired Indirect Branch Instructions Mispredicted.",
+    "BriefDescription": "Retired Indirect Branch Instructions Mispredicted."
   },
   {
     "EventName": "ex_ret_mmx_fp_instr.sse_instr",
diff --git a/tools/perf/pmu-events/arch/x86/amdzen2/core.json b/tools/perf/pmu-events/arch/x86/amdzen2/core.json
index de89e5a44ff15..4b75183da94ae 100644
--- a/tools/perf/pmu-events/arch/x86/amdzen2/core.json
+++ b/tools/perf/pmu-events/arch/x86/amdzen2/core.json
@@ -125,6 +125,6 @@
   {
     "EventName": "ex_ret_fus_brnch_inst",
     "EventCode": "0x1d0",
-    "BriefDescription": "Retired Fused Instructions. The number of fuse-branch instructions retired per cycle. The number of events logged per cycle can vary from 0-8.",
+    "BriefDescription": "Retired Fused Instructions. The number of fuse-branch instructions retired per cycle. The number of events logged per cycle can vary from 0-8."
   }
 ]
-- 
GitLab


From 22fe5a25b5d8c4f8008dc4a8738d6d8a5f5ddbe9 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:18 +0900
Subject: [PATCH 1227/1341] perf test: Free aliases for PMU event map aliases
 test

The aliases were never released causing the following leaks:

  Indirect leak of 1224 byte(s) in 9 object(s) allocated from:
    #0 0x7feefb830628 in malloc (/lib/x86_64-linux-gnu/libasan.so.5+0x107628)
    #1 0x56332c8f1b62 in __perf_pmu__new_alias util/pmu.c:322
    #2 0x56332c8f401f in pmu_add_cpu_aliases_map util/pmu.c:778
    #3 0x56332c792ce9 in __test__pmu_event_aliases tests/pmu-events.c:295
    #4 0x56332c792ce9 in test_aliases tests/pmu-events.c:367
    #5 0x56332c76a09b in run_test tests/builtin-test.c:410
    #6 0x56332c76a09b in test_and_print tests/builtin-test.c:440
    #7 0x56332c76ce69 in __cmd_test tests/builtin-test.c:695
    #8 0x56332c76ce69 in cmd_test tests/builtin-test.c:807
    #9 0x56332c7d2214 in run_builtin /home/namhyung/project/linux/tools/perf/perf.c:312
    #10 0x56332c6701a8 in handle_internal_command /home/namhyung/project/linux/tools/perf/perf.c:364
    #11 0x56332c6701a8 in run_argv /home/namhyung/project/linux/tools/perf/perf.c:408
    #12 0x56332c6701a8 in main /home/namhyung/project/linux/tools/perf/perf.c:538
    #13 0x7feefb359cc9 in __libc_start_main ../csu/libc-start.c:308

Fixes: 956a78356c24c ("perf test: Test pmu-events aliases")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Reviewed-by: John Garry <john.garry@huawei.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-11-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/pmu-events.c | 5 +++++
 tools/perf/util/pmu.c         | 2 +-
 tools/perf/util/pmu.h         | 1 +
 3 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/pmu-events.c b/tools/perf/tests/pmu-events.c
index eb19f9a0bc153..d3517a74d95e3 100644
--- a/tools/perf/tests/pmu-events.c
+++ b/tools/perf/tests/pmu-events.c
@@ -274,6 +274,7 @@ static int __test__pmu_event_aliases(char *pmu_name, int *count)
 	int res = 0;
 	bool use_uncore_table;
 	struct pmu_events_map *map = __test_pmu_get_events_map();
+	struct perf_pmu_alias *a, *tmp;
 
 	if (!map)
 		return -1;
@@ -347,6 +348,10 @@ static int __test__pmu_event_aliases(char *pmu_name, int *count)
 			  pmu_name, alias->name);
 	}
 
+	list_for_each_entry_safe(a, tmp, &aliases, list) {
+		list_del(&a->list);
+		perf_pmu_free_alias(a);
+	}
 	free(pmu);
 	return res;
 }
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index f1688e1f6ed78..555cb3524c25f 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -274,7 +274,7 @@ static void perf_pmu_update_alias(struct perf_pmu_alias *old,
 }
 
 /* Delete an alias entry. */
-static void perf_pmu_free_alias(struct perf_pmu_alias *newalias)
+void perf_pmu_free_alias(struct perf_pmu_alias *newalias)
 {
 	zfree(&newalias->name);
 	zfree(&newalias->desc);
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 44ccbdbb1c374..b63c4c5e335e7 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -113,6 +113,7 @@ void pmu_add_cpu_aliases_map(struct list_head *head, struct perf_pmu *pmu,
 
 struct pmu_events_map *perf_pmu__find_map(struct perf_pmu *pmu);
 bool pmu_uncore_alias_match(const char *pmu_name, const char *name);
+void perf_pmu_free_alias(struct perf_pmu_alias *alias);
 
 int perf_pmu__convert_scale(const char *scale, char **end, double *sval);
 
-- 
GitLab


From 4f57a1ed749a81ec553d89233cab53db9365e193 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:09 +0900
Subject: [PATCH 1228/1341] perf metric: Fix some memory leaks

I found some memory leaks while reading the metric code.  Some are real
and others only occur in the error path.  When it failed during metric
or event parsing, it should release all resources properly.

Fixes: b18f3e365019d ("perf stat: Support JSON metrics in perf stat")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/metricgroup.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index 8831b964288fa..af664d6218d64 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -530,6 +530,9 @@ void metricgroup__print(bool metrics, bool metricgroups, char *filter,
 						continue;
 					strlist__add(me->metrics, s);
 				}
+
+				if (!raw)
+					free(s);
 			}
 			free(omg);
 		}
@@ -1040,7 +1043,7 @@ static int parse_groups(struct evlist *perf_evlist, const char *str,
 	ret = metricgroup__add_metric_list(str, metric_no_group,
 					   &extra_events, &metric_list, map);
 	if (ret)
-		return ret;
+		goto out;
 	pr_debug("adding %s\n", extra_events.buf);
 	bzero(&parse_error, sizeof(parse_error));
 	ret = __parse_events(perf_evlist, extra_events.buf, &parse_error, fake_pmu);
@@ -1048,11 +1051,11 @@ static int parse_groups(struct evlist *perf_evlist, const char *str,
 		parse_events_print_error(&parse_error, extra_events.buf);
 		goto out;
 	}
-	strbuf_release(&extra_events);
 	ret = metricgroup__setup_events(&metric_list, metric_no_merge,
 					perf_evlist, metric_events);
 out:
 	metricgroup__free_metrics(&metric_list);
+	strbuf_release(&extra_events);
 	return ret;
 }
 
-- 
GitLab


From b033ab11ad0c7f9a9c9fa4a1ac2ffad14454a9f3 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:10 +0900
Subject: [PATCH 1229/1341] perf metric: Fix some memory leaks - part 2

The metric_event_delete() missed to free expr->metric_events and it
should free an expr when metric_refs allocation failed.

Fixes: 4ea2896715e67 ("perf metric: Collect referenced metrics in struct metric_expr")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/metricgroup.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index af664d6218d64..b28c09447c102 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -85,6 +85,7 @@ static void metric_event_delete(struct rblist *rblist __maybe_unused,
 
 	list_for_each_entry_safe(expr, tmp, &me->head, nd) {
 		free(expr->metric_refs);
+		free(expr->metric_events);
 		free(expr);
 	}
 
@@ -316,6 +317,7 @@ static int metricgroup__setup_events(struct list_head *groups,
 			if (!metric_refs) {
 				ret = -ENOMEM;
 				free(metric_events);
+				free(expr);
 				break;
 			}
 
-- 
GitLab


From bfd1b83d75e44a9f65de30accb3dd3b5940bd3ac Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:11 +0900
Subject: [PATCH 1230/1341] perf evlist: Fix cpu/thread map leak

Asan reported leak of cpu and thread maps as they have one more refcount
than released.  I found that after setting evlist maps it should release
it's refcount.

It seems to be broken from the beginning so I chose the original commit
as the culprit.  But not sure how it's applied to stable trees since
there are many changes in the code after that.

Fixes: 7e2ed097538c5 ("perf evlist: Store pointer to the cpu and thread maps")
Fixes: 4112eb1899c0e ("perf evlist: Default to syswide target when no thread/cpu maps set")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/evlist.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index e3fa3bf7498a2..c0768c61eb430 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -946,6 +946,10 @@ int perf_evlist__create_maps(struct evlist *evlist, struct target *target)
 
 	perf_evlist__set_maps(&evlist->core, cpus, threads);
 
+	/* as evlist now has references, put count here */
+	perf_cpu_map__put(cpus);
+	perf_thread_map__put(threads);
+
 	return 0;
 
 out_delete_threads:
@@ -1273,11 +1277,12 @@ static int perf_evlist__create_syswide_maps(struct evlist *evlist)
 		goto out_put;
 
 	perf_evlist__set_maps(&evlist->core, cpus, threads);
-out:
-	return err;
+
+	perf_thread_map__put(threads);
 out_put:
 	perf_cpu_map__put(cpus);
-	goto out;
+out:
+	return err;
 }
 
 int evlist__open(struct evlist *evlist)
-- 
GitLab


From b12eea5ad8e77f8a380a141e3db67c07432dde16 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:13 +0900
Subject: [PATCH 1231/1341] perf parse-event: Fix memory leak in evsel->unit

The evsel->unit borrows a pointer of pmu event or alias instead of
owns a string.  But tool event (duration_time) passes a result of
strdup() caused a leak.

It was found by ASAN during metric test:

  Direct leak of 210 byte(s) in 70 object(s) allocated from:
    #0 0x7fe366fca0b5 in strdup (/lib/x86_64-linux-gnu/libasan.so.5+0x920b5)
    #1 0x559fbbcc6ea3 in add_event_tool util/parse-events.c:414
    #2 0x559fbbcc6ea3 in parse_events_add_tool util/parse-events.c:1414
    #3 0x559fbbd8474d in parse_events_parse util/parse-events.y:439
    #4 0x559fbbcc95da in parse_events__scanner util/parse-events.c:2096
    #5 0x559fbbcc95da in __parse_events util/parse-events.c:2141
    #6 0x559fbbc28555 in check_parse_id tests/pmu-events.c:406
    #7 0x559fbbc28555 in check_parse_id tests/pmu-events.c:393
    #8 0x559fbbc28555 in check_parse_cpu tests/pmu-events.c:415
    #9 0x559fbbc28555 in test_parsing tests/pmu-events.c:498
    #10 0x559fbbc0109b in run_test tests/builtin-test.c:410
    #11 0x559fbbc0109b in test_and_print tests/builtin-test.c:440
    #12 0x559fbbc03e69 in __cmd_test tests/builtin-test.c:695
    #13 0x559fbbc03e69 in cmd_test tests/builtin-test.c:807
    #14 0x559fbbc691f4 in run_builtin /home/namhyung/project/linux/tools/perf/perf.c:312
    #15 0x559fbbb071a8 in handle_internal_command /home/namhyung/project/linux/tools/perf/perf.c:364
    #16 0x559fbbb071a8 in run_argv /home/namhyung/project/linux/tools/perf/perf.c:408
    #17 0x559fbbb071a8 in main /home/namhyung/project/linux/tools/perf/perf.c:538
    #18 0x7fe366b68cc9 in __libc_start_main ../csu/libc-start.c:308

Fixes: f0fbb114e3025 ("perf stat: Implement duration_time as a proper event")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/parse-events.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index c4d2394e2b2dc..667cbca1547ac 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -411,7 +411,7 @@ static int add_event_tool(struct list_head *list, int *idx,
 		return -ENOMEM;
 	evsel->tool_event = tool_event;
 	if (tool_event == PERF_TOOL_DURATION_TIME)
-		evsel->unit = strdup("ns");
+		evsel->unit = "ns";
 	return 0;
 }
 
-- 
GitLab


From f5a56570a3f2c01e5307a972ae7d4636edff7b13 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:14 +0900
Subject: [PATCH 1232/1341] perf test: Fix memory leaks in parse-metric test

It didn't release resources when there's an error so the
test_recursion_fail() will leak some memory.

Fixes: 0a507af9c681a ("perf tests: Add parse metric test for ipc metric")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-7-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/parse-metric.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c
index 23db8acc492df..cd7331aac3bdf 100644
--- a/tools/perf/tests/parse-metric.c
+++ b/tools/perf/tests/parse-metric.c
@@ -153,8 +153,10 @@ static int __compute_metric(const char *name, struct value *vals,
 		return -ENOMEM;
 
 	cpus = perf_cpu_map__new("0");
-	if (!cpus)
+	if (!cpus) {
+		evlist__delete(evlist);
 		return -ENOMEM;
+	}
 
 	perf_evlist__set_maps(&evlist->core, cpus, NULL);
 
@@ -163,10 +165,11 @@ static int __compute_metric(const char *name, struct value *vals,
 					     false, false,
 					     &metric_events);
 	if (err)
-		return err;
+		goto out;
 
-	if (perf_evlist__alloc_stats(evlist, false))
-		return -1;
+	err = perf_evlist__alloc_stats(evlist, false);
+	if (err)
+		goto out;
 
 	/* Load the runtime stats with given numbers for events. */
 	runtime_stat__init(&st);
@@ -178,13 +181,14 @@ static int __compute_metric(const char *name, struct value *vals,
 	if (name2 && ratio2)
 		*ratio2 = compute_single(&metric_events, evlist, &st, name2);
 
+out:
 	/* ... clenup. */
 	metricgroup__rblist_exit(&metric_events);
 	runtime_stat__exit(&st);
 	perf_evlist__free_stats(evlist);
 	perf_cpu_map__put(cpus);
 	evlist__delete(evlist);
-	return 0;
+	return err;
 }
 
 static int compute_metric(const char *name, struct value *vals, double *ratio)
-- 
GitLab


From 437822bf38c1dc3bda6ffde52689e4e667046a6a Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:15 +0900
Subject: [PATCH 1233/1341] perf metric: Release expr_parse_ctx after testing

The test_generic_metric() missed to release entries in the pctx.  Asan
reported following leak (and more):

  Direct leak of 128 byte(s) in 1 object(s) allocated from:
    #0 0x7f4c9396980e in calloc (/lib/x86_64-linux-gnu/libasan.so.5+0x10780e)
    #1 0x55f7e748cc14 in hashmap_grow (/home/namhyung/project/linux/tools/perf/perf+0x90cc14)
    #2 0x55f7e748d497 in hashmap__insert (/home/namhyung/project/linux/tools/perf/perf+0x90d497)
    #3 0x55f7e7341667 in hashmap__set /home/namhyung/project/linux/tools/perf/util/hashmap.h:111
    #4 0x55f7e7341667 in expr__add_ref util/expr.c:120
    #5 0x55f7e7292436 in prepare_metric util/stat-shadow.c:783
    #6 0x55f7e729556d in test_generic_metric util/stat-shadow.c:858
    #7 0x55f7e712390b in compute_single tests/parse-metric.c:128
    #8 0x55f7e712390b in __compute_metric tests/parse-metric.c:180
    #9 0x55f7e712446d in compute_metric tests/parse-metric.c:196
    #10 0x55f7e712446d in test_dcache_l2 tests/parse-metric.c:295
    #11 0x55f7e712446d in test__parse_metric tests/parse-metric.c:355
    #12 0x55f7e70be09b in run_test tests/builtin-test.c:410
    #13 0x55f7e70be09b in test_and_print tests/builtin-test.c:440
    #14 0x55f7e70c101a in __cmd_test tests/builtin-test.c:661
    #15 0x55f7e70c101a in cmd_test tests/builtin-test.c:807
    #16 0x55f7e7126214 in run_builtin /home/namhyung/project/linux/tools/perf/perf.c:312
    #17 0x55f7e6fc41a8 in handle_internal_command /home/namhyung/project/linux/tools/perf/perf.c:364
    #18 0x55f7e6fc41a8 in run_argv /home/namhyung/project/linux/tools/perf/perf.c:408
    #19 0x55f7e6fc41a8 in main /home/namhyung/project/linux/tools/perf/perf.c:538
    #20 0x7f4c93492cc9 in __libc_start_main ../csu/libc-start.c:308

Fixes: 6d432c4c8aa56 ("perf tools: Add test_generic_metric function")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-8-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/stat-shadow.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index e1ba6c1b916a6..a5f42c22c4846 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -853,14 +853,16 @@ static void generic_metric(struct perf_stat_config *config,
 double test_generic_metric(struct metric_expr *mexp, int cpu, struct runtime_stat *st)
 {
 	struct expr_parse_ctx pctx;
-	double ratio;
+	double ratio = 0.0;
 
 	if (prepare_metric(mexp->metric_events, mexp->metric_refs, &pctx, cpu, st) < 0)
-		return 0.;
+		goto out;
 
 	if (expr__parse(&ratio, &pctx, mexp->metric_expr, 1))
-		return 0.;
+		ratio = 0.0;
 
+out:
+	expr__ctx_clear(&pctx);
 	return ratio;
 }
 
-- 
GitLab


From 27adafcda3d8b8a818e85d58eea95b85b5f513f9 Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:16 +0900
Subject: [PATCH 1234/1341] perf metric: Free metric when it failed to resolve

The metricgroup__add_metric() can find multiple match for a metric group
and it's possible to fail.  Also it can fail in the middle like in
resolve_metric() even for single metric.

In those cases, the intermediate list and ids will be leaked like:

  Direct leak of 3 byte(s) in 1 object(s) allocated from:
    #0 0x7f4c938f40b5 in strdup (/lib/x86_64-linux-gnu/libasan.so.5+0x920b5)
    #1 0x55f7e71c1bef in __add_metric util/metricgroup.c:683
    #2 0x55f7e71c31d0 in add_metric util/metricgroup.c:906
    #3 0x55f7e71c3844 in metricgroup__add_metric util/metricgroup.c:940
    #4 0x55f7e71c488d in metricgroup__add_metric_list util/metricgroup.c:993
    #5 0x55f7e71c488d in parse_groups util/metricgroup.c:1045
    #6 0x55f7e71c60a4 in metricgroup__parse_groups_test util/metricgroup.c:1087
    #7 0x55f7e71235ae in __compute_metric tests/parse-metric.c:164
    #8 0x55f7e7124650 in compute_metric tests/parse-metric.c:196
    #9 0x55f7e7124650 in test_recursion_fail tests/parse-metric.c:318
    #10 0x55f7e7124650 in test__parse_metric tests/parse-metric.c:356
    #11 0x55f7e70be09b in run_test tests/builtin-test.c:410
    #12 0x55f7e70be09b in test_and_print tests/builtin-test.c:440
    #13 0x55f7e70c101a in __cmd_test tests/builtin-test.c:661
    #14 0x55f7e70c101a in cmd_test tests/builtin-test.c:807
    #15 0x55f7e7126214 in run_builtin /home/namhyung/project/linux/tools/perf/perf.c:312
    #16 0x55f7e6fc41a8 in handle_internal_command /home/namhyung/project/linux/tools/perf/perf.c:364
    #17 0x55f7e6fc41a8 in run_argv /home/namhyung/project/linux/tools/perf/perf.c:408
    #18 0x55f7e6fc41a8 in main /home/namhyung/project/linux/tools/perf/perf.c:538
    #19 0x7f4c93492cc9 in __libc_start_main ../csu/libc-start.c:308

Fixes: 83de0b7d535de ("perf metric: Collect referenced metrics in struct metric_ref_node")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-9-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/metricgroup.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index b28c09447c102..c8904e471a71e 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -939,7 +939,7 @@ static int metricgroup__add_metric(const char *metric, bool metric_no_group,
 
 		ret = add_metric(&list, pe, metric_no_group, &m, NULL, &ids);
 		if (ret)
-			return ret;
+			goto out;
 
 		/*
 		 * Process any possible referenced metrics
@@ -948,12 +948,14 @@ static int metricgroup__add_metric(const char *metric, bool metric_no_group,
 		ret = resolve_metric(metric_no_group,
 				     &list, map, &ids);
 		if (ret)
-			return ret;
+			goto out;
 	}
 
 	/* End of pmu events. */
-	if (!has_match)
-		return -EINVAL;
+	if (!has_match) {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	list_for_each_entry(m, &list, nd) {
 		if (events->len > 0)
@@ -968,9 +970,14 @@ static int metricgroup__add_metric(const char *metric, bool metric_no_group,
 		}
 	}
 
+out:
+	/*
+	 * add to metric_list so that they can be released
+	 * even if it's failed
+	 */
 	list_splice(&list, metric_list);
 	expr_ids__exit(&ids);
-	return 0;
+	return ret;
 }
 
 static int metricgroup__add_metric_list(const char *list, bool metric_no_group,
-- 
GitLab


From 6f47ed6cd12a0ea9b55b19b5d6e4a3b490a97bdf Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:17 +0900
Subject: [PATCH 1235/1341] perf metric: Do not free metric when failed to
 resolve

It's dangerous to free the original metric when it's called from
resolve_metric() as it's already in the metric_list and might have other
resources too.  Instead, it'd better let them bail out and be released
properly at the later stage.

So add a check when it's called from metricgroup__add_metric() and
release it.  Also make sure that mp is set properly.

Fixes: 83de0b7d535de ("perf metric: Collect referenced metrics in struct metric_ref_node")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-10-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/metricgroup.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/tools/perf/util/metricgroup.c b/tools/perf/util/metricgroup.c
index c8904e471a71e..ab5030fcfed4e 100644
--- a/tools/perf/util/metricgroup.c
+++ b/tools/perf/util/metricgroup.c
@@ -672,7 +672,6 @@ static int __add_metric(struct list_head *metric_list,
 		m->has_constraint = metric_no_group || metricgroup__has_constraint(pe);
 		INIT_LIST_HEAD(&m->metric_refs);
 		m->metric_refs_cnt = 0;
-		*mp = m;
 
 		parent = expr_ids__alloc(ids);
 		if (!parent) {
@@ -685,6 +684,7 @@ static int __add_metric(struct list_head *metric_list,
 			free(m);
 			return -ENOMEM;
 		}
+		*mp = m;
 	} else {
 		/*
 		 * We got here for the referenced metric, via the
@@ -719,8 +719,11 @@ static int __add_metric(struct list_head *metric_list,
 	 * all the metric's IDs and add it to the parent context.
 	 */
 	if (expr__find_other(pe->metric_expr, NULL, &m->pctx, runtime) < 0) {
-		expr__ctx_clear(&m->pctx);
-		free(m);
+		if (m->metric_refs_cnt == 0) {
+			expr__ctx_clear(&m->pctx);
+			free(m);
+			*mp = NULL;
+		}
 		return -EINVAL;
 	}
 
-- 
GitLab


From d26383dcb2b4b8629fde05270b4e3633be9e3d4b Mon Sep 17 00:00:00 2001
From: Namhyung Kim <namhyung@kernel.org>
Date: Tue, 15 Sep 2020 12:18:19 +0900
Subject: [PATCH 1236/1341] perf test: Free formats for perf pmu parse test

The following leaks were detected by ASAN:

  Indirect leak of 360 byte(s) in 9 object(s) allocated from:
    #0 0x7fecc305180e in calloc (/lib/x86_64-linux-gnu/libasan.so.5+0x10780e)
    #1 0x560578f6dce5 in perf_pmu__new_format util/pmu.c:1333
    #2 0x560578f752fc in perf_pmu_parse util/pmu.y:59
    #3 0x560578f6a8b7 in perf_pmu__format_parse util/pmu.c:73
    #4 0x560578e07045 in test__pmu tests/pmu.c:155
    #5 0x560578de109b in run_test tests/builtin-test.c:410
    #6 0x560578de109b in test_and_print tests/builtin-test.c:440
    #7 0x560578de401a in __cmd_test tests/builtin-test.c:661
    #8 0x560578de401a in cmd_test tests/builtin-test.c:807
    #9 0x560578e49354 in run_builtin /home/namhyung/project/linux/tools/perf/perf.c:312
    #10 0x560578ce71a8 in handle_internal_command /home/namhyung/project/linux/tools/perf/perf.c:364
    #11 0x560578ce71a8 in run_argv /home/namhyung/project/linux/tools/perf/perf.c:408
    #12 0x560578ce71a8 in main /home/namhyung/project/linux/tools/perf/perf.c:538
    #13 0x7fecc2b7acc9 in __libc_start_main ../csu/libc-start.c:308

Fixes: cff7f956ec4a1 ("perf tests: Move pmu tests into separate object")
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20200915031819.386559-12-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/pmu.c |  1 +
 tools/perf/util/pmu.c  | 11 +++++++++++
 tools/perf/util/pmu.h  |  1 +
 3 files changed, 13 insertions(+)

diff --git a/tools/perf/tests/pmu.c b/tools/perf/tests/pmu.c
index 5c11fe2b30406..714e6830a758f 100644
--- a/tools/perf/tests/pmu.c
+++ b/tools/perf/tests/pmu.c
@@ -173,6 +173,7 @@ int test__pmu(struct test *test __maybe_unused, int subtest __maybe_unused)
 		ret = 0;
 	} while (0);
 
+	perf_pmu__del_formats(&formats);
 	test_format_dir_put(format);
 	return ret;
 }
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 555cb3524c25f..d41caeb35cf6c 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1354,6 +1354,17 @@ void perf_pmu__set_format(unsigned long *bits, long from, long to)
 		set_bit(b, bits);
 }
 
+void perf_pmu__del_formats(struct list_head *formats)
+{
+	struct perf_pmu_format *fmt, *tmp;
+
+	list_for_each_entry_safe(fmt, tmp, formats, list) {
+		list_del(&fmt->list);
+		free(fmt->name);
+		free(fmt);
+	}
+}
+
 static int sub_non_neg(int a, int b)
 {
 	if (b > a)
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index b63c4c5e335e7..a64e9c9ce731a 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -94,6 +94,7 @@ int perf_pmu__new_format(struct list_head *list, char *name,
 			 int config, unsigned long *bits);
 void perf_pmu__set_format(unsigned long *bits, long from, long to);
 int perf_pmu__format_parse(char *dir, struct list_head *head);
+void perf_pmu__del_formats(struct list_head *formats);
 
 struct perf_pmu *perf_pmu__scan(struct perf_pmu *pmu);
 
-- 
GitLab


From 46908326c6b801201f1e46f5ed0db6e85bef74ae Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ardb@kernel.org>
Date: Tue, 15 Sep 2020 18:12:09 +0300
Subject: [PATCH 1237/1341] efi: efibc: check for efivars write capability

Branden reports that commit

  f88814cc2578c1 ("efi/efivars: Expose RT service availability via efivars abstraction")

regresses UEFI platforms that implement GetVariable but not SetVariable
when booting kernels that have EFIBC (bootloader control) enabled.

The reason is that EFIBC is a user of the efivars abstraction, which was
updated to permit users that rely only on the read capability, but not on
the write capability. EFIBC is in the latter category, so it has to check
explicitly whether efivars supports writes.

Fixes: f88814cc2578c1 ("efi/efivars: Expose RT service availability via efivars abstraction")
Tested-by: Branden Sherrell <sherrellbc@gmail.com>
Link: https://lore.kernel.org/linux-efi/AE217103-C96F-4AFC-8417-83EC11962004@gmail.com/
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 drivers/firmware/efi/efibc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/efi/efibc.c b/drivers/firmware/efi/efibc.c
index 35dccc88ac0af..15a47539dc563 100644
--- a/drivers/firmware/efi/efibc.c
+++ b/drivers/firmware/efi/efibc.c
@@ -84,7 +84,7 @@ static int __init efibc_init(void)
 {
 	int ret;
 
-	if (!efi_enabled(EFI_RUNTIME_SERVICES))
+	if (!efivars_kobject() || !efivar_supports_writes())
 		return -ENODEV;
 
 	ret = register_reboot_notifier(&efibc_reboot_notifier);
-- 
GitLab


From 5f155515d37351f90dbb1c8a5a5cae13190c8564 Mon Sep 17 00:00:00 2001
From: Wang Qing <wangqing@vivo.com>
Date: Thu, 13 Aug 2020 10:49:10 +0800
Subject: [PATCH 1238/1341] ACPI: NFIT: Use kobj_to_dev() instead

Use kobj_to_dev() instead of container_of()

Signed-off-by: Wang Qing <wangqing@vivo.com>
Acked-by: Vishal Verma <vishal.l.verma@intel.com>
[ rjw: Subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/nfit/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 26dd208a0d636..1904ae88a11cc 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -1389,7 +1389,7 @@ static bool ars_supported(struct nvdimm_bus *nvdimm_bus)
 
 static umode_t nfit_visible(struct kobject *kobj, struct attribute *a, int n)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct nvdimm_bus *nvdimm_bus = to_nvdimm_bus(dev);
 
 	if (a == &dev_attr_scrub.attr)
@@ -1679,7 +1679,7 @@ static struct attribute *acpi_nfit_dimm_attributes[] = {
 static umode_t acpi_nfit_dimm_attr_visible(struct kobject *kobj,
 		struct attribute *a, int n)
 {
-	struct device *dev = container_of(kobj, struct device, kobj);
+	struct device *dev = kobj_to_dev(kobj);
 	struct nvdimm *nvdimm = to_nvdimm(dev);
 	struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm);
 
-- 
GitLab


From fa870509d9ecd408714d8888568ccc9f2c52af2a Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 14 Aug 2020 16:27:25 +0300
Subject: [PATCH 1239/1341] ACPI / PMIC: Split out Kconfig and Makefile
 specific for ACPI PMIC

It's a bit better to maintain and allows to avoid mistakes in the future
with PMIC OpRegion drivers, if we split out Kconfig and Makefile
for ACPI PMIC to its own folder.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/Kconfig       | 51 ++------------------------------------
 drivers/acpi/Makefile      |  9 +------
 drivers/acpi/pmic/Kconfig  | 51 ++++++++++++++++++++++++++++++++++++++
 drivers/acpi/pmic/Makefile |  9 +++++++
 4 files changed, 63 insertions(+), 57 deletions(-)
 create mode 100644 drivers/acpi/pmic/Kconfig
 create mode 100644 drivers/acpi/pmic/Makefile

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 7540a5179a47e..6fb9453396dce 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -504,55 +504,6 @@ config ACPI_EXTLOG
 config ACPI_ADXL
 	bool
 
-menuconfig PMIC_OPREGION
-	bool "PMIC (Power Management Integrated Circuit) operation region support"
-	help
-	  Select this option to enable support for ACPI operation
-	  region of the PMIC chip. The operation region can be used
-	  to control power rails and sensor reading/writing on the
-	  PMIC chip.
-
-if PMIC_OPREGION
-config BYTCRC_PMIC_OPREGION
-	bool "ACPI operation region support for Bay Trail Crystal Cove PMIC"
-	depends on INTEL_SOC_PMIC
-	help
-	  This config adds ACPI operation region support for the Bay Trail
-	  version of the Crystal Cove PMIC.
-
-config CHTCRC_PMIC_OPREGION
-	bool "ACPI operation region support for Cherry Trail Crystal Cove PMIC"
-	depends on INTEL_SOC_PMIC
-	help
-	  This config adds ACPI operation region support for the Cherry Trail
-	  version of the Crystal Cove PMIC.
-
-config XPOWER_PMIC_OPREGION
-	bool "ACPI operation region support for XPower AXP288 PMIC"
-	depends on MFD_AXP20X_I2C && IOSF_MBI=y
-	help
-	  This config adds ACPI operation region support for XPower AXP288 PMIC.
-
-config BXT_WC_PMIC_OPREGION
-	bool "ACPI operation region support for BXT WhiskeyCove PMIC"
-	depends on INTEL_SOC_PMIC_BXTWC
-	help
-	  This config adds ACPI operation region support for BXT WhiskeyCove PMIC.
-
-config CHT_WC_PMIC_OPREGION
-	bool "ACPI operation region support for CHT Whiskey Cove PMIC"
-	depends on INTEL_SOC_PMIC_CHTWC
-	help
-	  This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
-
-config CHT_DC_TI_PMIC_OPREGION
-	bool "ACPI operation region support for Dollar Cove TI PMIC"
-	depends on INTEL_SOC_PMIC_CHTDC_TI
-	help
-	  This config adds ACPI operation region support for Dollar Cove TI PMIC.
-
-endif
-
 config ACPI_CONFIGFS
 	tristate "ACPI configfs support"
 	select CONFIGFS_FS
@@ -568,6 +519,8 @@ config ACPI_PPTT
 	bool
 endif
 
+source "drivers/acpi/pmic/Kconfig"
+
 config TPS68470_PMIC_OPREGION
 	bool "ACPI operation region support for TPS68470 PMIC"
 	depends on MFD_TPS68470
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 9a957544e3573..44929d248bfaa 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -107,16 +107,9 @@ obj-$(CONFIG_ACPI_APEI)		+= apei/
 
 obj-$(CONFIG_ACPI_EXTLOG)	+= acpi_extlog.o
 
-obj-$(CONFIG_PMIC_OPREGION)	+= pmic/intel_pmic.o
-obj-$(CONFIG_BYTCRC_PMIC_OPREGION) += pmic/intel_pmic_bytcrc.o
-obj-$(CONFIG_CHTCRC_PMIC_OPREGION) += pmic/intel_pmic_chtcrc.o
-obj-$(CONFIG_XPOWER_PMIC_OPREGION) += pmic/intel_pmic_xpower.o
-obj-$(CONFIG_BXT_WC_PMIC_OPREGION) += pmic/intel_pmic_bxtwc.o
-obj-$(CONFIG_CHT_WC_PMIC_OPREGION) += pmic/intel_pmic_chtwc.o
-obj-$(CONFIG_CHT_DC_TI_PMIC_OPREGION) += pmic/intel_pmic_chtdc_ti.o
-
 obj-$(CONFIG_ACPI_CONFIGFS)	+= acpi_configfs.o
 
+obj-y				+= pmic/
 obj-$(CONFIG_TPS68470_PMIC_OPREGION)	+= pmic/tps68470_pmic.o
 
 video-objs			+= acpi_video.o video_detect.o
diff --git a/drivers/acpi/pmic/Kconfig b/drivers/acpi/pmic/Kconfig
new file mode 100644
index 0000000000000..357d1a846e68b
--- /dev/null
+++ b/drivers/acpi/pmic/Kconfig
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0
+
+menuconfig PMIC_OPREGION
+	bool "PMIC (Power Management Integrated Circuit) operation region support"
+	help
+	  Select this option to enable support for ACPI operation
+	  region of the PMIC chip. The operation region can be used
+	  to control power rails and sensor reading/writing on the
+	  PMIC chip.
+
+if PMIC_OPREGION
+
+config BYTCRC_PMIC_OPREGION
+	bool "ACPI operation region support for Bay Trail Crystal Cove PMIC"
+	depends on INTEL_SOC_PMIC
+	help
+	  This config adds ACPI operation region support for the Bay Trail
+	  version of the Crystal Cove PMIC.
+
+config CHTCRC_PMIC_OPREGION
+	bool "ACPI operation region support for Cherry Trail Crystal Cove PMIC"
+	depends on INTEL_SOC_PMIC
+	help
+	  This config adds ACPI operation region support for the Cherry Trail
+	  version of the Crystal Cove PMIC.
+
+config XPOWER_PMIC_OPREGION
+	bool "ACPI operation region support for XPower AXP288 PMIC"
+	depends on MFD_AXP20X_I2C && IOSF_MBI=y
+	help
+	  This config adds ACPI operation region support for XPower AXP288 PMIC.
+
+config BXT_WC_PMIC_OPREGION
+	bool "ACPI operation region support for BXT WhiskeyCove PMIC"
+	depends on INTEL_SOC_PMIC_BXTWC
+	help
+	  This config adds ACPI operation region support for BXT WhiskeyCove PMIC.
+
+config CHT_WC_PMIC_OPREGION
+	bool "ACPI operation region support for CHT Whiskey Cove PMIC"
+	depends on INTEL_SOC_PMIC_CHTWC
+	help
+	  This config adds ACPI operation region support for CHT Whiskey Cove PMIC.
+
+config CHT_DC_TI_PMIC_OPREGION
+	bool "ACPI operation region support for Dollar Cove TI PMIC"
+	depends on INTEL_SOC_PMIC_CHTDC_TI
+	help
+	  This config adds ACPI operation region support for Dollar Cove TI PMIC.
+
+endif	# PMIC_OPREGION
diff --git a/drivers/acpi/pmic/Makefile b/drivers/acpi/pmic/Makefile
new file mode 100644
index 0000000000000..773c267420bc9
--- /dev/null
+++ b/drivers/acpi/pmic/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_PMIC_OPREGION)		+= intel_pmic.o
+obj-$(CONFIG_BYTCRC_PMIC_OPREGION)	+= intel_pmic_bytcrc.o
+obj-$(CONFIG_CHTCRC_PMIC_OPREGION)	+= intel_pmic_chtcrc.o
+obj-$(CONFIG_XPOWER_PMIC_OPREGION)	+= intel_pmic_xpower.o
+obj-$(CONFIG_BXT_WC_PMIC_OPREGION)	+= intel_pmic_bxtwc.o
+obj-$(CONFIG_CHT_WC_PMIC_OPREGION)	+= intel_pmic_chtwc.o
+obj-$(CONFIG_CHT_DC_TI_PMIC_OPREGION)	+= intel_pmic_chtdc_ti.o
-- 
GitLab


From e410c43b66d52dde6a4b8554dc85a9dc06e57937 Mon Sep 17 00:00:00 2001
From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Fri, 14 Aug 2020 16:27:26 +0300
Subject: [PATCH 1240/1341] ACPI / PMIC: Move TPS68470 OpRegion driver to
 drivers/acpi/pmic/

It is revealed now that TPS68470 OpRegion driver has been added
in slightly different scope. Let's move it to the drivers/acpi/pmic/
folder for sake of the unification.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/Kconfig       | 16 ----------------
 drivers/acpi/Makefile      |  1 -
 drivers/acpi/pmic/Kconfig  | 16 ++++++++++++++++
 drivers/acpi/pmic/Makefile |  1 +
 4 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 6fb9453396dce..edf1558c11052 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -521,22 +521,6 @@ endif
 
 source "drivers/acpi/pmic/Kconfig"
 
-config TPS68470_PMIC_OPREGION
-	bool "ACPI operation region support for TPS68470 PMIC"
-	depends on MFD_TPS68470
-	help
-	  This config adds ACPI operation region support for TI TPS68470 PMIC.
-	  TPS68470 device is an advanced power management unit that powers
-	  a Compact Camera Module (CCM), generates clocks for image sensors,
-	  drives a dual LED for flash and incorporates two LED drivers for
-	  general purpose indicators.
-	  This driver enables ACPI operation region support control voltage
-	  regulators and clocks.
-
-	  This option is a bool as it provides an ACPI operation
-	  region, which must be available before any of the devices
-	  using this, are probed.
-
 endif	# ACPI
 
 config X86_PM_TIMER
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 44929d248bfaa..44e4125063178 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -110,7 +110,6 @@ obj-$(CONFIG_ACPI_EXTLOG)	+= acpi_extlog.o
 obj-$(CONFIG_ACPI_CONFIGFS)	+= acpi_configfs.o
 
 obj-y				+= pmic/
-obj-$(CONFIG_TPS68470_PMIC_OPREGION)	+= pmic/tps68470_pmic.o
 
 video-objs			+= acpi_video.o video_detect.o
 obj-y				+= dptf/
diff --git a/drivers/acpi/pmic/Kconfig b/drivers/acpi/pmic/Kconfig
index 357d1a846e68b..56bbcb2ce61b2 100644
--- a/drivers/acpi/pmic/Kconfig
+++ b/drivers/acpi/pmic/Kconfig
@@ -49,3 +49,19 @@ config CHT_DC_TI_PMIC_OPREGION
 	  This config adds ACPI operation region support for Dollar Cove TI PMIC.
 
 endif	# PMIC_OPREGION
+
+config TPS68470_PMIC_OPREGION
+	bool "ACPI operation region support for TPS68470 PMIC"
+	depends on MFD_TPS68470
+	help
+	  This config adds ACPI operation region support for TI TPS68470 PMIC.
+	  TPS68470 device is an advanced power management unit that powers
+	  a Compact Camera Module (CCM), generates clocks for image sensors,
+	  drives a dual LED for flash and incorporates two LED drivers for
+	  general purpose indicators.
+	  This driver enables ACPI operation region support control voltage
+	  regulators and clocks.
+
+	  This option is a bool as it provides an ACPI operation
+	  region, which must be available before any of the devices
+	  using this, are probed.
diff --git a/drivers/acpi/pmic/Makefile b/drivers/acpi/pmic/Makefile
index 773c267420bc9..cd072c64920c6 100644
--- a/drivers/acpi/pmic/Makefile
+++ b/drivers/acpi/pmic/Makefile
@@ -7,3 +7,4 @@ obj-$(CONFIG_XPOWER_PMIC_OPREGION)	+= intel_pmic_xpower.o
 obj-$(CONFIG_BXT_WC_PMIC_OPREGION)	+= intel_pmic_bxtwc.o
 obj-$(CONFIG_CHT_WC_PMIC_OPREGION)	+= intel_pmic_chtwc.o
 obj-$(CONFIG_CHT_DC_TI_PMIC_OPREGION)	+= intel_pmic_chtdc_ti.o
+obj-$(CONFIG_TPS68470_PMIC_OPREGION)	+= tps68470_pmic.o
-- 
GitLab


From 66a5710beaf42903d553378f609166034bd219c7 Mon Sep 17 00:00:00 2001
From: Dennis Li <Dennis.Li@amd.com>
Date: Wed, 2 Sep 2020 12:57:59 +0800
Subject: [PATCH 1241/1341] drm/kfd: fix a system crash issue during GPU
 recovery

The crash log as the below:

[Thu Aug 20 23:18:14 2020] general protection fault: 0000 [#1] SMP NOPTI
[Thu Aug 20 23:18:14 2020] CPU: 152 PID: 1837 Comm: kworker/152:1 Tainted: G           OE     5.4.0-42-generic #46~18.04.1-Ubuntu
[Thu Aug 20 23:18:14 2020] Hardware name: GIGABYTE G482-Z53-YF/MZ52-G40-00, BIOS R12 05/13/2020
[Thu Aug 20 23:18:14 2020] Workqueue: events amdgpu_ras_do_recovery [amdgpu]
[Thu Aug 20 23:18:14 2020] RIP: 0010:evict_process_queues_cpsch+0xc9/0x130 [amdgpu]
[Thu Aug 20 23:18:14 2020] Code: 49 8d 4d 10 48 39 c8 75 21 eb 44 83 fa 03 74 36 80 78 72 00 74 0c 83 ab 68 01 00 00 01 41 c6 45 41 00 48 8b 00 48 39 c8 74 25 <80> 78 70 00 c6 40 6d 01 74 ee 8b 50 28 c6 40 70 00 83 ab 60 01 00
[Thu Aug 20 23:18:14 2020] RSP: 0018:ffffb29b52f6fc90 EFLAGS: 00010213
[Thu Aug 20 23:18:14 2020] RAX: 1c884edb0a118914 RBX: ffff8a0d45ff3c00 RCX: ffff8a2d83e41038
[Thu Aug 20 23:18:14 2020] RDX: 0000000000000000 RSI: 0000000000000082 RDI: ffff8a0e2e4178c0
[Thu Aug 20 23:18:14 2020] RBP: ffffb29b52f6fcb0 R08: 0000000000001b64 R09: 0000000000000004
[Thu Aug 20 23:18:14 2020] R10: ffffb29b52f6fb78 R11: 0000000000000001 R12: ffff8a0d45ff3d28
[Thu Aug 20 23:18:14 2020] R13: ffff8a2d83e41028 R14: 0000000000000000 R15: 0000000000000000
[Thu Aug 20 23:18:14 2020] FS:  0000000000000000(0000) GS:ffff8a0e2e400000(0000) knlGS:0000000000000000
[Thu Aug 20 23:18:14 2020] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Thu Aug 20 23:18:14 2020] CR2: 000055c783c0e6a8 CR3: 00000034a1284000 CR4: 0000000000340ee0
[Thu Aug 20 23:18:14 2020] Call Trace:
[Thu Aug 20 23:18:14 2020]  kfd_process_evict_queues+0x43/0xd0 [amdgpu]
[Thu Aug 20 23:18:14 2020]  kfd_suspend_all_processes+0x60/0xf0 [amdgpu]
[Thu Aug 20 23:18:14 2020]  kgd2kfd_suspend.part.7+0x43/0x50 [amdgpu]
[Thu Aug 20 23:18:14 2020]  kgd2kfd_pre_reset+0x46/0x60 [amdgpu]
[Thu Aug 20 23:18:14 2020]  amdgpu_amdkfd_pre_reset+0x1a/0x20 [amdgpu]
[Thu Aug 20 23:18:14 2020]  amdgpu_device_gpu_recover+0x377/0xf90 [amdgpu]
[Thu Aug 20 23:18:14 2020]  ? amdgpu_ras_error_query+0x1b8/0x2a0 [amdgpu]
[Thu Aug 20 23:18:14 2020]  amdgpu_ras_do_recovery+0x159/0x190 [amdgpu]
[Thu Aug 20 23:18:14 2020]  process_one_work+0x20f/0x400
[Thu Aug 20 23:18:14 2020]  worker_thread+0x34/0x410

When GPU hang, user process will fail to create a compute queue whose
struct object will be freed later, but driver wrongly add this queue to
queue list of the proccess. And then kfd_process_evict_queues will
access a freed memory, which cause a system crash.

v2:
The failure to execute_queues should probably not be reported to
the caller of create_queue, because the queue was already created.
Therefore change to ignore the return value from execute_queues.

Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Dennis Li <Dennis.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
---
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index e0e60b0d0669e..ef78492ef956f 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -1326,7 +1326,7 @@ static int create_queue_cpsch(struct device_queue_manager *dqm, struct queue *q,
 	if (q->properties.is_active) {
 		increment_queue_count(dqm, q->properties.type);
 
-		retval = execute_queues_cpsch(dqm,
+		execute_queues_cpsch(dqm,
 				KFD_UNMAP_QUEUES_FILTER_DYNAMIC_QUEUES, 0);
 	}
 
-- 
GitLab


From 087d764159996ae378b08c0fdd557537adfd6899 Mon Sep 17 00:00:00 2001
From: Dennis Li <Dennis.Li@amd.com>
Date: Wed, 2 Sep 2020 17:11:09 +0800
Subject: [PATCH 1242/1341] drm/amdkfd: fix a memory leak issue

In the resume stage of GPU recovery, start_cpsch will call pm_init
which set pm->allocated as false, cause the next pm_release_ib has
no chance to release ib memory.

Add pm_release_ib in stop_cpsch which will be called in the suspend
stage of GPU recovery.

Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Dennis Li <Dennis.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
index ef78492ef956f..0f4508b4903e7 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
@@ -1216,6 +1216,8 @@ static int stop_cpsch(struct device_queue_manager *dqm)
 	dqm->sched_running = false;
 	dqm_unlock(dqm);
 
+	pm_release_ib(&dqm->packets);
+
 	kfd_gtt_sa_free(dqm->dev, dqm->fence_mem);
 	pm_uninit(&dqm->packets, hanging);
 
-- 
GitLab


From cc8e66e769ebd1d10c406a3152474bab24ac1730 Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Mon, 14 Sep 2020 14:42:51 +0800
Subject: [PATCH 1243/1341] drm/amd/pm: support runtime pptable update for
 sienna_cichlid etc.

This avoids smu issue when enabling runtime pptable update for
sienna_cichlid and so on. Runtime pptable udpate is needed for test
and debug purpose.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index 0826625573dce..63f945f9f3317 100644
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -1126,7 +1126,7 @@ static int smu_disable_dpms(struct smu_context *smu)
 	 */
 	if (smu->uploading_custom_pp_table &&
 	    (adev->asic_type >= CHIP_NAVI10) &&
-	    (adev->asic_type <= CHIP_NAVI12))
+	    (adev->asic_type <= CHIP_NAVY_FLOUNDER))
 		return 0;
 
 	/*
@@ -1211,7 +1211,9 @@ static int smu_hw_fini(void *handle)
 int smu_reset(struct smu_context *smu)
 {
 	struct amdgpu_device *adev = smu->adev;
-	int ret = 0;
+	int ret;
+
+	amdgpu_gfx_off_ctrl(smu->adev, false);
 
 	ret = smu_hw_fini(adev);
 	if (ret)
@@ -1222,8 +1224,12 @@ int smu_reset(struct smu_context *smu)
 		return ret;
 
 	ret = smu_late_init(adev);
+	if (ret)
+		return ret;
 
-	return ret;
+	amdgpu_gfx_off_ctrl(smu->adev, true);
+
+	return 0;
 }
 
 static int smu_suspend(void *handle)
-- 
GitLab


From 4cdd7b332ed139b1e37faeb82409a14490adb644 Mon Sep 17 00:00:00 2001
From: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Date: Fri, 28 Aug 2020 11:09:38 -0400
Subject: [PATCH 1244/1341] drm/amd/display: Don't use DRM_ERROR() for DTM add
 topology

[Why]
Previously we were only calling add_topology when hdcp was being enabled.
Now we call add_topology by default so the ERROR messages are printed if
the firmware is not loaded.

This error message is not relevant for normal display functionality so
no need to print a ERROR message.

[How]
Change DRM_ERROR to DRM_INFO

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
index fb1161dd7ea80..3a367a5968ae1 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_psp.c
@@ -88,7 +88,7 @@ enum mod_hdcp_status mod_hdcp_add_display_to_topology(struct mod_hdcp *hdcp,
 	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 
 	if (!psp->dtm_context.dtm_initialized) {
-		DRM_ERROR("Failed to add display topology, DTM TA is not initialized.");
+		DRM_INFO("Failed to add display topology, DTM TA is not initialized.");
 		display->state = MOD_HDCP_DISPLAY_INACTIVE;
 		return MOD_HDCP_STATUS_FAILURE;
 	}
-- 
GitLab


From c4790a8894232f39c25c7c546c06efe074e63384 Mon Sep 17 00:00:00 2001
From: Jun Lei <jun.lei@amd.com>
Date: Thu, 3 Sep 2020 16:17:46 -0400
Subject: [PATCH 1245/1341] drm/amd/display: update nv1x stutter latencies

[why]
Recent characterization shows increased stutter latencies on some SKUs,
leading to underflow.

[how]
Update SOC params to account for this worst case latency.

Signed-off-by: Jun Lei <jun.lei@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
index 9140b3fc767ab..f31f48dd0da29 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c
@@ -409,8 +409,8 @@ static struct _vcs_dpi_soc_bounding_box_st dcn2_0_nv14_soc = {
 			},
 		},
 	.num_states = 5,
-	.sr_exit_time_us = 8.6,
-	.sr_enter_plus_exit_time_us = 10.9,
+	.sr_exit_time_us = 11.6,
+	.sr_enter_plus_exit_time_us = 13.9,
 	.urgent_latency_us = 4.0,
 	.urgent_latency_pixel_data_only_us = 4.0,
 	.urgent_latency_pixel_mixed_with_vm_data_us = 4.0,
-- 
GitLab


From 5367eb6d8a98b8682877961f4ccee1088d5735f3 Mon Sep 17 00:00:00 2001
From: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Date: Thu, 10 Sep 2020 13:59:33 -0400
Subject: [PATCH 1246/1341] drm/amdgpu: Include sienna_cichlid in USBC PD FW
 support.

Create sysfs interface also for sienna_cichlid.

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index d8c6520ff74ad..06757681b2cec 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -178,7 +178,7 @@ static int psp_sw_init(void *handle)
 		return ret;
 	}
 
-	if (adev->asic_type == CHIP_NAVI10) {
+	if (adev->asic_type == CHIP_NAVI10 || adev->asic_type == CHIP_SIENNA_CICHLID) {
 		ret= psp_sysfs_init(adev);
 		if (ret) {
 			return ret;
-- 
GitLab


From 40eab0f8956724b0c2bb9e5679269632afb72b26 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Christian=20K=C3=B6nig?= <christian.koenig@amd.com>
Date: Wed, 9 Sep 2020 13:12:46 +0200
Subject: [PATCH 1247/1341] drm/radeon: revert "Prefer lower feedback dividers"
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Turns out this breaks a lot of different hardware.

This reverts commit fc8c70526bd30733ea8667adb8b8ffebea30a8ed.

Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/radeon/radeon_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 7b69d6dfe44a3..e0ae911ef427d 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -933,7 +933,7 @@ static void avivo_get_fb_ref_div(unsigned nom, unsigned den, unsigned post_div,
 
 	/* get matching reference and feedback divider */
 	*ref_div = min(max(den/post_div, 1u), ref_div_max);
-	*fb_div = max(nom * *ref_div * post_div / den, 1u);
+	*fb_div = DIV_ROUND_CLOSEST(nom * *ref_div * post_div, den);
 
 	/* limit fb divider to its maximum */
 	if (*fb_div > fb_div_max) {
-- 
GitLab


From 2f228aab21bbc74e90e267a721215ec8be51daf7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <mdaenzer@redhat.com>
Date: Fri, 4 Sep 2020 12:43:04 +0200
Subject: [PATCH 1248/1341] drm/amdgpu/dc: Require primary plane to be enabled
 whenever the CRTC is
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Don't check drm_crtc_state::active for this either, per its
documentation in include/drm/drm_crtc.h:

 * Hence drivers must not consult @active in their various
 * &drm_mode_config_funcs.atomic_check callback to reject an atomic
 * commit.

atomic_remove_fb disables the CRTC as needed for disabling the primary
plane.

This prevents at least the following problems if the primary plane gets
disabled (e.g. due to destroying the FB assigned to the primary plane,
as happens e.g. with mutter in Wayland mode):

* The legacy cursor ioctl returned EINVAL for a non-0 cursor FB ID
  (which enables the cursor plane).
* If the cursor plane was enabled, changing the legacy DPMS property
  value from off to on returned EINVAL.

v2:
* Minor changes to code comment and commit log, per review feedback.

GitLab: https://gitlab.gnome.org/GNOME/mutter/-/issues/1108
GitLab: https://gitlab.gnome.org/GNOME/mutter/-/issues/1165
GitLab: https://gitlab.gnome.org/GNOME/mutter/-/issues/1344
Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 32 ++++++-------------
 1 file changed, 10 insertions(+), 22 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index b51c527a3f0de..4ba8b54a26956 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5278,19 +5278,6 @@ static void dm_crtc_helper_disable(struct drm_crtc *crtc)
 {
 }
 
-static bool does_crtc_have_active_cursor(struct drm_crtc_state *new_crtc_state)
-{
-	struct drm_device *dev = new_crtc_state->crtc->dev;
-	struct drm_plane *plane;
-
-	drm_for_each_plane_mask(plane, dev, new_crtc_state->plane_mask) {
-		if (plane->type == DRM_PLANE_TYPE_CURSOR)
-			return true;
-	}
-
-	return false;
-}
-
 static int count_crtc_active_planes(struct drm_crtc_state *new_crtc_state)
 {
 	struct drm_atomic_state *state = new_crtc_state->state;
@@ -5354,19 +5341,20 @@ static int dm_crtc_helper_atomic_check(struct drm_crtc *crtc,
 		return ret;
 	}
 
-	/* In some use cases, like reset, no stream is attached */
-	if (!dm_crtc_state->stream)
-		return 0;
-
 	/*
-	 * We want at least one hardware plane enabled to use
-	 * the stream with a cursor enabled.
+	 * We require the primary plane to be enabled whenever the CRTC is, otherwise
+	 * drm_mode_cursor_universal may end up trying to enable the cursor plane while all other
+	 * planes are disabled, which is not supported by the hardware. And there is legacy
+	 * userspace which stops using the HW cursor altogether in response to the resulting EINVAL.
 	 */
-	if (state->enable && state->active &&
-	    does_crtc_have_active_cursor(state) &&
-	    dm_crtc_state->active_planes == 0)
+	if (state->enable &&
+	    !(state->plane_mask & drm_plane_mask(crtc->primary)))
 		return -EINVAL;
 
+	/* In some use cases, like reset, no stream is attached */
+	if (!dm_crtc_state->stream)
+		return 0;
+
 	if (dc_validate_stream(dc, dm_crtc_state->stream) == DC_OK)
 		return 0;
 
-- 
GitLab


From e7d95527f27a6d9edcffbd74eee38e5cb6b91785 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 30 Jul 2020 10:28:56 +0100
Subject: [PATCH 1249/1341] drm/i915/gem: Delay tracking the GEM context until
 it is registered

Avoid exposing a partially constructed context by deferring the
list_add() from the initial construction to the end of registration.
Otherwise, if we peek into the list of contexts from inside debugfs, we
may see the partially constructed context and chase down some dangling
incomplete pointers.

Reported-by: CQ Tang <cq.tang@intel.com>
Fixes: 3aa9945a528e ("drm/i915: Separate GEM context construction and registration to userspace")
References: f6e8aa387171 ("drm/i915: Report the number of closed vma held by each context in debugfs")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: CQ Tang <cq.tang@intel.com>
Cc: <stable@vger.kernel.org> # v5.2+
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200730092856.23615-1-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit eb4dedae920a07c485328af3da2202ec5184fb17)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_context.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index d0bdb6d447ed4..efc4ba34c06e8 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -713,6 +713,7 @@ __create_context(struct drm_i915_private *i915)
 	ctx->i915 = i915;
 	ctx->sched.priority = I915_USER_PRIORITY(I915_PRIORITY_NORMAL);
 	mutex_init(&ctx->mutex);
+	INIT_LIST_HEAD(&ctx->link);
 
 	spin_lock_init(&ctx->stale.lock);
 	INIT_LIST_HEAD(&ctx->stale.engines);
@@ -740,10 +741,6 @@ __create_context(struct drm_i915_private *i915)
 	for (i = 0; i < ARRAY_SIZE(ctx->hang_timestamp); i++)
 		ctx->hang_timestamp[i] = jiffies - CONTEXT_FAST_HANG_JIFFIES;
 
-	spin_lock(&i915->gem.contexts.lock);
-	list_add_tail(&ctx->link, &i915->gem.contexts.list);
-	spin_unlock(&i915->gem.contexts.lock);
-
 	return ctx;
 
 err_free:
@@ -931,6 +928,7 @@ static int gem_context_register(struct i915_gem_context *ctx,
 				struct drm_i915_file_private *fpriv,
 				u32 *id)
 {
+	struct drm_i915_private *i915 = ctx->i915;
 	struct i915_address_space *vm;
 	int ret;
 
@@ -949,8 +947,16 @@ static int gem_context_register(struct i915_gem_context *ctx,
 	/* And finally expose ourselves to userspace via the idr */
 	ret = xa_alloc(&fpriv->context_xa, id, ctx, xa_limit_32b, GFP_KERNEL);
 	if (ret)
-		put_pid(fetch_and_zero(&ctx->pid));
+		goto err_pid;
+
+	spin_lock(&i915->gem.contexts.lock);
+	list_add_tail(&ctx->link, &i915->gem.contexts.list);
+	spin_unlock(&i915->gem.contexts.lock);
+
+	return 0;
 
+err_pid:
+	put_pid(fetch_and_zero(&ctx->pid));
 	return ret;
 }
 
-- 
GitLab


From c2314b8bd4c009793b6f9d57bc8363af034e02ca Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 6 Aug 2020 11:59:54 +0100
Subject: [PATCH 1250/1341] drm/i915/gem: Reduce context termination list
 iteration guard to RCU

As we now protect the timeline list using RCU, we can drop the
timeline->mutex for guarding the list iteration during context close, as
we are searching for an inflight request. Any new request will see the
context is banned and not be submitted. In doing so, pull the checks for
a concurrent submission of the request (notably the
i915_request_completed()) under the engine spinlock, to fully serialise
with __i915_request_submit()). That is in the case of preempt-to-busy
where the request may be completed during the __i915_request_submit(),
we need to be careful that we sample the request status after
serialising so that we don't miss the request the engine is actually
submitting.

Fixes: 4a3174152147 ("drm/i915/gem: Refine occupancy test in kill_context()")
References: d22d2d073ef8 ("drm/i915: Protect i915_request_await_start from early waits") # rcu protection of timeline->requests
References: https://gitlab.freedesktop.org/drm/intel/-/issues/1622
References: https://gitlab.freedesktop.org/drm/intel/-/issues/2158
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200806105954.7766-1-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit 736e785f9b28cd9ef2d16a80960a04fd00e64b22)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_context.c | 32 ++++++++++++---------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_context.c b/drivers/gpu/drm/i915/gem/i915_gem_context.c
index efc4ba34c06e8..ef755dd5e68fc 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_context.c
@@ -439,29 +439,36 @@ static bool __cancel_engine(struct intel_engine_cs *engine)
 	return __reset_engine(engine);
 }
 
-static struct intel_engine_cs *__active_engine(struct i915_request *rq)
+static bool
+__active_engine(struct i915_request *rq, struct intel_engine_cs **active)
 {
 	struct intel_engine_cs *engine, *locked;
+	bool ret = false;
 
 	/*
 	 * Serialise with __i915_request_submit() so that it sees
 	 * is-banned?, or we know the request is already inflight.
+	 *
+	 * Note that rq->engine is unstable, and so we double
+	 * check that we have acquired the lock on the final engine.
 	 */
 	locked = READ_ONCE(rq->engine);
 	spin_lock_irq(&locked->active.lock);
 	while (unlikely(locked != (engine = READ_ONCE(rq->engine)))) {
 		spin_unlock(&locked->active.lock);
-		spin_lock(&engine->active.lock);
 		locked = engine;
+		spin_lock(&locked->active.lock);
 	}
 
-	engine = NULL;
-	if (i915_request_is_active(rq) && rq->fence.error != -EIO)
-		engine = rq->engine;
+	if (!i915_request_completed(rq)) {
+		if (i915_request_is_active(rq) && rq->fence.error != -EIO)
+			*active = locked;
+		ret = true;
+	}
 
 	spin_unlock_irq(&locked->active.lock);
 
-	return engine;
+	return ret;
 }
 
 static struct intel_engine_cs *active_engine(struct intel_context *ce)
@@ -472,17 +479,16 @@ static struct intel_engine_cs *active_engine(struct intel_context *ce)
 	if (!ce->timeline)
 		return NULL;
 
-	mutex_lock(&ce->timeline->mutex);
-	list_for_each_entry_reverse(rq, &ce->timeline->requests, link) {
-		if (i915_request_completed(rq))
-			break;
+	rcu_read_lock();
+	list_for_each_entry_rcu(rq, &ce->timeline->requests, link) {
+		if (i915_request_is_active(rq) && i915_request_completed(rq))
+			continue;
 
 		/* Check with the backend if the request is inflight */
-		engine = __active_engine(rq);
-		if (engine)
+		if (__active_engine(rq, &engine))
 			break;
 	}
-	mutex_unlock(&ce->timeline->mutex);
+	rcu_read_unlock();
 
 	return engine;
 }
-- 
GitLab


From b82a8b93b4f9008de97d6920184948563980df37 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Thu, 16 Jul 2020 15:22:06 +0100
Subject: [PATCH 1251/1341] drm/i915: Be wary of data races when reading the
 active execlists

To implement preempt-to-busy (and so efficient timeslicing and best utilization
of the hardware submission ports) we let the GPU run asynchronously in respect
to the ELSP submission queue. This created challenges in keeping and accessing
the driver state mirroring the asynchronous GPU execution.

The latest occurence of this was spotted by KCSAN:

[ 1413.563200] BUG: KCSAN: data-race in __await_execution+0x217/0x370 [i915]
[ 1413.563221]
[ 1413.563236] race at unknown origin, with read to 0xffff88885bb6c478 of 8 bytes by task 9654 on cpu 1:
[ 1413.563548]  __await_execution+0x217/0x370 [i915]
[ 1413.563891]  i915_request_await_dma_fence+0x4eb/0x6a0 [i915]
[ 1413.564235]  i915_request_await_object+0x421/0x490 [i915]
[ 1413.564577]  i915_gem_do_execbuffer+0x29b7/0x3c40 [i915]
[ 1413.564967]  i915_gem_execbuffer2_ioctl+0x22f/0x5c0 [i915]
[ 1413.564998]  drm_ioctl_kernel+0x156/0x1b0
[ 1413.565022]  drm_ioctl+0x2ff/0x480
[ 1413.565046]  __x64_sys_ioctl+0x87/0xd0
[ 1413.565069]  do_syscall_64+0x4d/0x80
[ 1413.565094]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

To complicate matters, we have to both avoid the read tearing of *active and
avoid any write tearing as perform the pending[] -> inflight[] promotion of the
execlists.

This is because we cannot rely on the memcpy doing u64 aligned copies on all
kernels/platforms and so we opt to open-code it with explicit WRITE_ONCE
annotations to satisfy KCSAN.

v2: When in doubt, write the same comment again.
v3: Expanded commit message.

Fixes: b55230e5e800 ("drm/i915: Check for awaits on still currently executing requests")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200716142207.13003-1-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
[Joonas: Rebased and reordered into drm-intel-gt-next branch]
[Joonas: Added expanded commit message from Tvrtko and Chris]
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit b4d9145b0154f8c71dafc2db5fd445f1f3db9426)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/gt/intel_lrc.c | 15 +++++++++++----
 drivers/gpu/drm/i915/i915_request.c | 25 +++++++++++++++++++++++--
 2 files changed, 34 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c
index 24322ef08aa40..9eeaca957a7e2 100644
--- a/drivers/gpu/drm/i915/gt/intel_lrc.c
+++ b/drivers/gpu/drm/i915/gt/intel_lrc.c
@@ -2060,6 +2060,14 @@ static inline void clear_ports(struct i915_request **ports, int count)
 	memset_p((void **)ports, NULL, count);
 }
 
+static inline void
+copy_ports(struct i915_request **dst, struct i915_request **src, int count)
+{
+	/* A memcpy_p() would be very useful here! */
+	while (count--)
+		WRITE_ONCE(*dst++, *src++); /* avoid write tearing */
+}
+
 static void execlists_dequeue(struct intel_engine_cs *engine)
 {
 	struct intel_engine_execlists * const execlists = &engine->execlists;
@@ -2648,10 +2656,9 @@ static void process_csb(struct intel_engine_cs *engine)
 
 			/* switch pending to inflight */
 			GEM_BUG_ON(!assert_pending_valid(execlists, "promote"));
-			memcpy(execlists->inflight,
-			       execlists->pending,
-			       execlists_num_ports(execlists) *
-			       sizeof(*execlists->pending));
+			copy_ports(execlists->inflight,
+				   execlists->pending,
+				   execlists_num_ports(execlists));
 			smp_wmb(); /* complete the seqlock */
 			WRITE_ONCE(execlists->active, execlists->inflight);
 
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 0b2fe55e61945..781a6783affe9 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -388,17 +388,38 @@ static bool __request_in_flight(const struct i915_request *signal)
 	 * As we know that there are always preemption points between
 	 * requests, we know that only the currently executing request
 	 * may be still active even though we have cleared the flag.
-	 * However, we can't rely on our tracking of ELSP[0] to known
+	 * However, we can't rely on our tracking of ELSP[0] to know
 	 * which request is currently active and so maybe stuck, as
 	 * the tracking maybe an event behind. Instead assume that
 	 * if the context is still inflight, then it is still active
 	 * even if the active flag has been cleared.
+	 *
+	 * To further complicate matters, if there a pending promotion, the HW
+	 * may either perform a context switch to the second inflight execlists,
+	 * or it may switch to the pending set of execlists. In the case of the
+	 * latter, it may send the ACK and we process the event copying the
+	 * pending[] over top of inflight[], _overwriting_ our *active. Since
+	 * this implies the HW is arbitrating and not struck in *active, we do
+	 * not worry about complete accuracy, but we do require no read/write
+	 * tearing of the pointer [the read of the pointer must be valid, even
+	 * as the array is being overwritten, for which we require the writes
+	 * to avoid tearing.]
+	 *
+	 * Note that the read of *execlists->active may race with the promotion
+	 * of execlists->pending[] to execlists->inflight[], overwritting
+	 * the value at *execlists->active. This is fine. The promotion implies
+	 * that we received an ACK from the HW, and so the context is not
+	 * stuck -- if we do not see ourselves in *active, the inflight status
+	 * is valid. If instead we see ourselves being copied into *active,
+	 * we are inflight and may signal the callback.
 	 */
 	if (!intel_context_inflight(signal->context))
 		return false;
 
 	rcu_read_lock();
-	for (port = __engine_active(signal->engine); (rq = *port); port++) {
+	for (port = __engine_active(signal->engine);
+	     (rq = READ_ONCE(*port)); /* may race with promotion of pending[] */
+	     port++) {
 		if (rq->context == signal->context) {
 			inflight = i915_seqno_passed(rq->fence.seqno,
 						     signal->fence.seqno);
-- 
GitLab


From 20612303a0b45de748d31331407e84300c38e497 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 28 Jul 2020 16:21:44 +0100
Subject: [PATCH 1252/1341] drm/i915: Filter wake_flags passed to
 default_wake_function

(NOTE: This is the minimal backportable fix, a full fix is being
developed at https://patchwork.freedesktop.org/patch/388048/)

The flags passed to the wait_entry.func are passed onwards to
try_to_wake_up(), which has a very particular interpretation for its
wake_flags. In particular, beyond the published WF_SYNC, it has a few
internal flags as well. Since we passed the fence->error down the chain
via the flags argument, these ended up in the default_wake_function
confusing the kernel/sched.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/2110
Fixes: ef4688497512 ("drm/i915: Propagate fence errors")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Matthew Auld <matthew.auld@intel.com>
Cc: <stable@vger.kernel.org> # v5.4+
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200728152144.1100-1-chris@chris-wilson.co.uk
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
[Joonas: Rebased and reordered into drm-intel-gt-next branch]
[Joonas: Added a note and link about more complete fix]
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
(cherry picked from commit f4b3c395540aa3d4f5a6275c5bdd83ab89034806)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/i915_sw_fence.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_sw_fence.c b/drivers/gpu/drm/i915/i915_sw_fence.c
index 295b9829e2da5..4cd2038cbe359 100644
--- a/drivers/gpu/drm/i915/i915_sw_fence.c
+++ b/drivers/gpu/drm/i915/i915_sw_fence.c
@@ -164,9 +164,13 @@ static void __i915_sw_fence_wake_up_all(struct i915_sw_fence *fence,
 
 		do {
 			list_for_each_entry_safe(pos, next, &x->head, entry) {
-				pos->func(pos,
-					  TASK_NORMAL, fence->error,
-					  &extra);
+				int wake_flags;
+
+				wake_flags = fence->error;
+				if (pos->func == autoremove_wake_function)
+					wake_flags = 0;
+
+				pos->func(pos, TASK_NORMAL, wake_flags, &extra);
 			}
 
 			if (list_empty(&extra))
-- 
GitLab


From 130a96d698d7bee9f339832d1e47ab26aad8dbf1 Mon Sep 17 00:00:00 2001
From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Date: Wed, 16 Sep 2020 12:00:33 +0300
Subject: [PATCH 1253/1341] usb: typec: ucsi: acpi: Increase command completion
 timeout value

UCSI specification quite clearly states that if a command
can't be completed in 10ms, the firmware must notify
about BUSY condition. Unfortunately almost none of the
platforms (the firmware on them) generate the BUSY
notification even if a command can't be completed in time.

The driver already considered that, and used a timeout
value of 5 seconds, but processing especially the alternate
mode discovery commands takes often considerable amount of
time from the firmware, much more than the 5 seconds. That
happens especially after bootup when devices are already
connected to the USB Type-C connector. For now on those
platforms the alternate mode discovery has simply failed
because of the timeout.

To improve the situation, increasing the timeout value for
the command completion to 1 minute. That should give enough
time for even the slowest firmware to process the commands.

Fixes: f56de278e8ec ("usb: typec: ucsi: acpi: Move to the new API")
Cc: stable@vger.kernel.org
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20200916090034.25119-2-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/ucsi/ucsi_acpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/typec/ucsi/ucsi_acpi.c b/drivers/usb/typec/ucsi/ucsi_acpi.c
index c0aca2f0f23f0..fbfe8f5933af8 100644
--- a/drivers/usb/typec/ucsi/ucsi_acpi.c
+++ b/drivers/usb/typec/ucsi/ucsi_acpi.c
@@ -78,7 +78,7 @@ static int ucsi_acpi_sync_write(struct ucsi *ucsi, unsigned int offset,
 	if (ret)
 		goto out_clear_bit;
 
-	if (!wait_for_completion_timeout(&ua->complete, msecs_to_jiffies(5000)))
+	if (!wait_for_completion_timeout(&ua->complete, 60 * HZ))
 		ret = -ETIMEDOUT;
 
 out_clear_bit:
-- 
GitLab


From 386e15a650447f53de3d2d8819ce9393f31650a4 Mon Sep 17 00:00:00 2001
From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Date: Wed, 16 Sep 2020 12:00:34 +0300
Subject: [PATCH 1254/1341] usb: typec: ucsi: Prevent mode overrun

Sometimes the embedded controller firmware does not
terminate the list of alternate modes that the partner
supports in its response to the GET_ALTERNATE_MODES command.
Instead the firmware returns the supported alternate modes
over and over again until the driver stops requesting them.

If that happens, the number of modes for each alternate mode
will exceed the maximum 6 that is defined in the USB Power
Delivery specification. Making sure that can't happen by
adding a check for it.

This fixes NULL pointer dereference that is caused by the
overrun.

Fixes: ad74b8649beaf ("usb: typec: ucsi: Preliminary support for alternate modes")
Cc: stable@vger.kernel.org
Reported-by: Zwane Mwaikambo <zwanem@gmail.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20200916090034.25119-3-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/ucsi/ucsi.c | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/drivers/usb/typec/ucsi/ucsi.c b/drivers/usb/typec/ucsi/ucsi.c
index e680fcfdee609..758b988ac518a 100644
--- a/drivers/usb/typec/ucsi/ucsi.c
+++ b/drivers/usb/typec/ucsi/ucsi.c
@@ -216,14 +216,18 @@ void ucsi_altmode_update_active(struct ucsi_connector *con)
 					    con->partner_altmode[i] == altmode);
 }
 
-static u8 ucsi_altmode_next_mode(struct typec_altmode **alt, u16 svid)
+static int ucsi_altmode_next_mode(struct typec_altmode **alt, u16 svid)
 {
 	u8 mode = 1;
 	int i;
 
-	for (i = 0; alt[i]; i++)
+	for (i = 0; alt[i]; i++) {
+		if (i > MODE_DISCOVERY_MAX)
+			return -ERANGE;
+
 		if (alt[i]->svid == svid)
 			mode++;
+	}
 
 	return mode;
 }
@@ -258,8 +262,11 @@ static int ucsi_register_altmode(struct ucsi_connector *con,
 			goto err;
 		}
 
-		desc->mode = ucsi_altmode_next_mode(con->port_altmode,
-						    desc->svid);
+		ret = ucsi_altmode_next_mode(con->port_altmode, desc->svid);
+		if (ret < 0)
+			return ret;
+
+		desc->mode = ret;
 
 		switch (desc->svid) {
 		case USB_TYPEC_DP_SID:
@@ -292,8 +299,11 @@ static int ucsi_register_altmode(struct ucsi_connector *con,
 			goto err;
 		}
 
-		desc->mode = ucsi_altmode_next_mode(con->partner_altmode,
-						    desc->svid);
+		ret = ucsi_altmode_next_mode(con->partner_altmode, desc->svid);
+		if (ret < 0)
+			return ret;
+
+		desc->mode = ret;
 
 		alt = typec_partner_register_altmode(con->partner, desc);
 		if (IS_ERR(alt)) {
-- 
GitLab


From 325b008723b2dd31de020e85ab9d2e9aa4637d35 Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oneukum@suse.com>
Date: Wed, 16 Sep 2020 11:40:25 +0200
Subject: [PATCH 1255/1341] USB: UAS: fix disconnect by unplugging a hub

The SCSI layer can go into an ugly loop if you ignore that a device is
gone. You need to report an error in the command rather than in the
return value of the queue method.

We need to specifically check for ENODEV. The issue goes back to the
introduction of the driver.

Fixes: 115bb1ffa54c3 ("USB: Add UAS driver")
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200916094026.30085-2-oneukum@suse.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/storage/uas.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/storage/uas.c b/drivers/usb/storage/uas.c
index 08f9296431e9a..8183504e3abbc 100644
--- a/drivers/usb/storage/uas.c
+++ b/drivers/usb/storage/uas.c
@@ -662,8 +662,7 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
 	if (devinfo->resetting) {
 		cmnd->result = DID_ERROR << 16;
 		cmnd->scsi_done(cmnd);
-		spin_unlock_irqrestore(&devinfo->lock, flags);
-		return 0;
+		goto zombie;
 	}
 
 	/* Find a free uas-tag */
@@ -699,6 +698,16 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
 		cmdinfo->state &= ~(SUBMIT_DATA_IN_URB | SUBMIT_DATA_OUT_URB);
 
 	err = uas_submit_urbs(cmnd, devinfo);
+	/*
+	 * in case of fatal errors the SCSI layer is peculiar
+	 * a command that has finished is a success for the purpose
+	 * of queueing, no matter how fatal the error
+	 */
+	if (err == -ENODEV) {
+		cmnd->result = DID_ERROR << 16;
+		cmnd->scsi_done(cmnd);
+		goto zombie;
+	}
 	if (err) {
 		/* If we did nothing, give up now */
 		if (cmdinfo->state & SUBMIT_STATUS_URB) {
@@ -709,6 +718,7 @@ static int uas_queuecommand_lck(struct scsi_cmnd *cmnd,
 	}
 
 	devinfo->cmnd[idx] = cmnd;
+zombie:
 	spin_unlock_irqrestore(&devinfo->lock, flags);
 	return 0;
 }
-- 
GitLab


From bcea6dafeeef7d1a6a8320a249aabf981d63b881 Mon Sep 17 00:00:00 2001
From: Penghao <penghao@uniontech.com>
Date: Mon, 7 Sep 2020 10:30:26 +0800
Subject: [PATCH 1256/1341] USB: quirks: Add USB_QUIRK_IGNORE_REMOTE_WAKEUP
 quirk for BYD zhaoxin notebook

Add a USB_QUIRK_IGNORE_REMOTE_WAKEUP quirk for the BYD zhaoxin notebook.
This notebook come with usb touchpad. And we would like to disable
touchpad wakeup on this notebook by default.

Signed-off-by: Penghao <penghao@uniontech.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200907023026.28189-1-penghao@uniontech.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/core/quirks.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index f232914de5fd4..10574fa3f9277 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -397,6 +397,10 @@ static const struct usb_device_id usb_quirk_list[] = {
 	/* Generic RTL8153 based ethernet adapters */
 	{ USB_DEVICE(0x0bda, 0x8153), .driver_info = USB_QUIRK_NO_LPM },
 
+	/* SONiX USB DEVICE Touchpad */
+	{ USB_DEVICE(0x0c45, 0x7056), .driver_info =
+			USB_QUIRK_IGNORE_REMOTE_WAKEUP },
+
 	/* Action Semiconductor flash disk */
 	{ USB_DEVICE(0x10d6, 0x2200), .driver_info =
 			USB_QUIRK_STRING_FETCH_255 },
-- 
GitLab


From d69030c91b3765934048151792f141f0571efa86 Mon Sep 17 00:00:00 2001
From: Madhusudanarao Amara <madhusudanarao.amara@intel.com>
Date: Wed, 16 Sep 2020 12:11:02 +0300
Subject: [PATCH 1257/1341] usb: typec: intel_pmc_mux: Handle SCU IPC error
 conditions

Check and return if there are errors. The response bits are valid
only on no errors.

Fixes: b7404a29cd3d ("usb: typec: intel_pmc_mux: Definitions for response status bits")
Signed-off-by: Madhusudanarao Amara <madhusudanarao.amara@intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20200916091102.27118-4-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/typec/mux/intel_pmc_mux.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/usb/typec/mux/intel_pmc_mux.c b/drivers/usb/typec/mux/intel_pmc_mux.c
index ec7da0fa3cf8c..676b525c2a662 100644
--- a/drivers/usb/typec/mux/intel_pmc_mux.c
+++ b/drivers/usb/typec/mux/intel_pmc_mux.c
@@ -125,13 +125,19 @@ static int hsl_orientation(struct pmc_usb_port *port)
 static int pmc_usb_command(struct pmc_usb_port *port, u8 *msg, u32 len)
 {
 	u8 response[4];
+	int ret;
 
 	/*
 	 * Error bit will always be 0 with the USBC command.
-	 * Status can be checked from the response message.
+	 * Status can be checked from the response message if the
+	 * function intel_scu_ipc_dev_command succeeds.
 	 */
-	intel_scu_ipc_dev_command(port->pmc->ipc, PMC_USBC_CMD, 0, msg, len,
-				  response, sizeof(response));
+	ret = intel_scu_ipc_dev_command(port->pmc->ipc, PMC_USBC_CMD, 0, msg,
+					len, response, sizeof(response));
+
+	if (ret)
+		return ret;
+
 	if (response[2] & PMC_USB_RESP_STATUS_FAILURE) {
 		if (response[2] & PMC_USB_RESP_STATUS_FATAL)
 			return -EIO;
-- 
GitLab


From fe88c6489264eaea23570dfdf03e1d3f5f47f423 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Wed, 9 Sep 2020 16:31:00 +0200
Subject: [PATCH 1258/1341] serial: core: fix port-lock initialisation

Commit f743061a85f5 ("serial: core: Initialise spin lock before use in
uart_configure_port()") tried to work around a breakage introduced by
commit a3cb39d258ef ("serial: core: Allow detach and attach serial
device for console") by adding a second initialisation of the port lock
when registering the port.

As reported by the build robots [1], this doesn't really solve the
regression introduced by the console-detach changes and also adds a
second redundant initialisation of the lock for normal ports.

Start cleaning up this mess by removing the redundant initialisation and
making sure that the port lock is again initialised once-only for ports
that aren't already in use as a console.

[1] https://lore.kernel.org/r/20200802054852.GR23458@shao2-debian

Fixes: f743061a85f5 ("serial: core: Initialise spin lock before use in uart_configure_port()")
Fixes: a3cb39d258ef ("serial: core: Allow detach and attach serial device for console")
Cc: stable <stable@vger.kernel.org>     # 5.7
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200909143101.15389-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/serial_core.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index f797c971cd82f..53b79e1fcbc8d 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2378,13 +2378,6 @@ uart_configure_port(struct uart_driver *drv, struct uart_state *state,
 		/* Power up port for set_mctrl() */
 		uart_change_pm(state, UART_PM_STATE_ON);
 
-		/*
-		 * If this driver supports console, and it hasn't been
-		 * successfully registered yet, initialise spin lock for it.
-		 */
-		if (port->cons && !(port->cons->flags & CON_ENABLED))
-			__uart_port_spin_lock_init(port);
-
 		/*
 		 * Ensure that the modem control lines are de-activated.
 		 * keep the DTR setting that is set in uart_set_options()
@@ -2900,7 +2893,12 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
 		goto out;
 	}
 
-	uart_port_spin_lock_init(uport);
+	/*
+	 * If this port is in use as a console then the spinlock is already
+	 * initialised.
+	 */
+	if (!uart_console_enabled(uport))
+		__uart_port_spin_lock_init(uport);
 
 	if (uport->cons && uport->dev)
 		of_console_check(uport->dev->of_node, uport->cons->name, uport->line);
-- 
GitLab


From e0830dbf71f191851ed3772d2760f007b7c5bc3a Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Wed, 9 Sep 2020 16:31:01 +0200
Subject: [PATCH 1259/1341] serial: core: fix console port-lock regression

Fix the port-lock initialisation regression introduced by commit
a3cb39d258ef ("serial: core: Allow detach and attach serial device for
console") by making sure that the lock is again initialised during
console setup.

The console may be registered before the serial controller has been
probed in which case the port lock needs to be initialised during
console setup by a call to uart_set_options(). The console-detach
changes introduced a regression in several drivers by effectively
removing that initialisation by not initialising the lock when the port
is used as a console (which is always the case during console setup).

Add back the early lock initialisation and instead use a new
console-reinit flag to handle the case where a console is being
re-attached through sysfs.

The question whether the console-detach interface should have been added
in the first place is left for another discussion.

Note that the console-enabled check in uart_set_options() is not
redundant because of kgdboc, which can end up reinitialising an already
enabled console (see commit 42b6a1baa3ec ("serial_core: Don't
re-initialize a previously initialized spinlock.")).

Fixes: a3cb39d258ef ("serial: core: Allow detach and attach serial device for console")
Cc: stable <stable@vger.kernel.org>     # 5.7
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200909143101.15389-3-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/serial_core.c | 32 +++++++++++++++-----------------
 include/linux/serial_core.h      |  1 +
 2 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 53b79e1fcbc8d..124524ecfe262 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1916,24 +1916,12 @@ static inline bool uart_console_enabled(struct uart_port *port)
 	return uart_console(port) && (port->cons->flags & CON_ENABLED);
 }
 
-static void __uart_port_spin_lock_init(struct uart_port *port)
+static void uart_port_spin_lock_init(struct uart_port *port)
 {
 	spin_lock_init(&port->lock);
 	lockdep_set_class(&port->lock, &port_lock_key);
 }
 
-/*
- * Ensure that the serial console lock is initialised early.
- * If this port is a console, then the spinlock is already initialised.
- */
-static inline void uart_port_spin_lock_init(struct uart_port *port)
-{
-	if (uart_console(port))
-		return;
-
-	__uart_port_spin_lock_init(port);
-}
-
 #if defined(CONFIG_SERIAL_CORE_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
 /**
  *	uart_console_write - write a console message to a serial port
@@ -2086,7 +2074,15 @@ uart_set_options(struct uart_port *port, struct console *co,
 	struct ktermios termios;
 	static struct ktermios dummy;
 
-	uart_port_spin_lock_init(port);
+	/*
+	 * Ensure that the serial-console lock is initialised early.
+	 *
+	 * Note that the console-enabled check is needed because of kgdboc,
+	 * which can end up calling uart_set_options() for an already enabled
+	 * console via tty_find_polling_driver() and uart_poll_init().
+	 */
+	if (!uart_console_enabled(port) && !port->console_reinit)
+		uart_port_spin_lock_init(port);
 
 	memset(&termios, 0, sizeof(struct ktermios));
 
@@ -2794,10 +2790,12 @@ static ssize_t console_store(struct device *dev,
 		if (oldconsole && !newconsole) {
 			ret = unregister_console(uport->cons);
 		} else if (!oldconsole && newconsole) {
-			if (uart_console(uport))
+			if (uart_console(uport)) {
+				uport->console_reinit = 1;
 				register_console(uport->cons);
-			else
+			} else {
 				ret = -ENOENT;
+			}
 		}
 	} else {
 		ret = -ENXIO;
@@ -2898,7 +2896,7 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
 	 * initialised.
 	 */
 	if (!uart_console_enabled(uport))
-		__uart_port_spin_lock_init(uport);
+		uart_port_spin_lock_init(uport);
 
 	if (uport->cons && uport->dev)
 		of_console_check(uport->dev->of_node, uport->cons->name, uport->line);
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 01fc4d9c9c540..8a99279a579bc 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -248,6 +248,7 @@ struct uart_port {
 
 	unsigned char		hub6;			/* this should be in the 8250 driver */
 	unsigned char		suspended;
+	unsigned char		console_reinit;
 	const char		*name;			/* port name */
 	struct attribute_group	*attr_group;		/* port specific attributes */
 	const struct attribute_group **tty_groups;	/* all attributes (serial core use only) */
-- 
GitLab


From 3c5a87be170aba8ac40982182f812dcff6ed1ad1 Mon Sep 17 00:00:00 2001
From: Tobias Diedrich <tobiasdiedrich@gmail.com>
Date: Mon, 14 Sep 2020 19:36:28 +0200
Subject: [PATCH 1260/1341] serial: 8250_pci: Add Realtek 816a and 816b

These serial ports are exposed by the OOB-management-engine on
RealManage-enabled network cards (e.g. AMD DASH enabled systems using
Realtek cards).

Because these have 3 BARs, they fail the "num_iomem <= 1" check in
serial_pci_guess_board.

I've manually checked the two IOMEM regions and BAR 2 doesn't seem to
respond to reads, but BAR 4 seems to be an MMIO version of the IO ports
(untested).

With this change, the ports are detected:
0000:02:00.1: ttyS0 at I/O 0x2200 (irq = 82, base_baud = 115200) is a 16550A
0000:02:00.2: ttyS1 at I/O 0x2100 (irq = 55, base_baud = 115200) is a 16550A

lspci output:
02:00.1 0700: 10ec:816a (rev 0e) (prog-if 02 [16550])
        Subsystem: 17aa:5082
        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort+ <TAbort- <MAbort- >SERR- <PERR- INTx-
        Interrupt: pin B routed to IRQ 82
        IOMMU group: 11
        Region 0: I/O ports at 2200 [size=256]
        Region 2: Memory at fd715000 (64-bit, non-prefetchable) [size=4K]
        Region 4: Memory at fd704000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [40] Power Management version 3
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA PME(D0+,D1+,D2+,D3hot+,D3cold+)
                Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [50] MSI: Enable- Count=1/1 Maskable- 64bit+
                Address: 0000000000000000  Data: 0000
        Capabilities: [70] Express (v2) Endpoint, MSI 01
                DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s unlimited, L1 <64us
                        ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset- SlotPowerLimit 0.000W
                DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq-
                        RlxdOrd+ ExtTag- PhantFunc- AuxPwr- NoSnoop-
                        MaxPayload 128 bytes, MaxReadReq 512 bytes
                DevSta: CorrErr+ NonFatalErr- FatalErr- UnsupReq+ AuxPwr+ TransPend-
                LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s unlimited, L1 <64us
                        ClockPM+ Surprise- LLActRep- BwNot- ASPMOptComp+
                LnkCtl: ASPM L1 Enabled; RCB 64 bytes, Disabled- CommClk+
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 2.5GT/s (ok), Width x1 (ok)
                        TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
                DevCap2: Completion Timeout: Range ABCD, TimeoutDis+ NROPrPrP- LTR+
                         10BitTagComp- 10BitTagReq- OBFF Via message/WAKE#, ExtFmt- EETLPPrefix-
                         EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
                         FRS- TPHComp- ExtTPHComp-
                         AtomicOpsCap: 32bit- 64bit- 128bitCAS-
                DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis- LTR- OBFF Disabled,
                         AtomicOpsCtl: ReqEn-
                LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- EqualizationPhase1-
                         EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest-
                         Retimer- 2Retimers- CrosslinkRes: unsupported
        Capabilities: [b0] MSI-X: Enable- Count=4 Masked-
                Vector table: BAR=4 offset=00000000
                PBA: BAR=4 offset=00000800
        Capabilities: [d0] Vital Product Data
                Not readable
        Capabilities: [100 v2] Advanced Error Reporting
                UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
                UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
                UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
                CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+
                CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr+
                AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- ECRCChkCap+ ECRCChkEn-
                        MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap-
                HeaderLog: 00000000 00000000 00000000 00000000
        Capabilities: [160 v1] Device Serial Number 00-00-00-00-00-00-00-00
        Capabilities: [170 v1] Latency Tolerance Reporting
                Max snoop latency: 0ns
                Max no snoop latency: 0ns
        Capabilities: [178 v1] L1 PM Substates
                L1SubCap: PCI-PM_L1.2+ PCI-PM_L1.1+ ASPM_L1.2+ ASPM_L1.1+ L1_PM_Substates+
                          PortCommonModeRestoreTime=150us PortTPowerOnTime=150us
                L1SubCtl1: PCI-PM_L1.2- PCI-PM_L1.1- ASPM_L1.2- ASPM_L1.1-
                           T_CommonMode=0us LTR1.2_Threshold=0ns
                L1SubCtl2: T_PwrOn=10us
02:00.2 0700: 10ec:816b (rev 0e)
[...same...]

Signed-off-by: Tobias Diedrich <tobiasdiedrich@gmail.com>
Cc: stable <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20200914173628.GA22508@yamamaya.is-a-geek.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/tty/serial/8250/8250_pci.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_pci.c b/drivers/tty/serial/8250/8250_pci.c
index 3eb2d485eaeb0..55bb7b897d976 100644
--- a/drivers/tty/serial/8250/8250_pci.c
+++ b/drivers/tty/serial/8250/8250_pci.c
@@ -5566,6 +5566,17 @@ static const struct pci_device_id serial_pci_tbl[] = {
 		PCI_ANY_ID, PCI_ANY_ID,
 		0, 0, pbn_wch384_4 },
 
+	/*
+	 * Realtek RealManage
+	 */
+	{	PCI_VENDOR_ID_REALTEK, 0x816a,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, pbn_b0_1_115200 },
+
+	{	PCI_VENDOR_ID_REALTEK, 0x816b,
+		PCI_ANY_ID, PCI_ANY_ID,
+		0, 0, pbn_b0_1_115200 },
+
 	/* Fintek PCI serial cards */
 	{ PCI_DEVICE(0x1c29, 0x1104), .driver_data = pbn_fintek_4 },
 	{ PCI_DEVICE(0x1c29, 0x1108), .driver_data = pbn_fintek_8 },
-- 
GitLab


From e1c2d96cd0196383e6c390c8abf0b9045a9616b2 Mon Sep 17 00:00:00 2001
From: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
Date: Fri, 21 Aug 2020 11:48:10 -0700
Subject: [PATCH 1261/1341] powercap: RAPL: Add support for Lakefield

Simply add Lakefield model ID. No additional changes are needed.

Signed-off-by: Ricardo Neri <ricardo.neri-calderon@linux.intel.com>
[ rjw: Minor subject edit ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/powercap/intel_rapl_common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c
index 25c764905f9bd..983d75bd5bd19 100644
--- a/drivers/powercap/intel_rapl_common.c
+++ b/drivers/powercap/intel_rapl_common.c
@@ -1039,6 +1039,7 @@ static const struct x86_cpu_id rapl_ids[] __initconst = {
 	X86_MATCH_INTEL_FAM6_MODEL(ROCKETLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(ALDERLAKE,		&rapl_defaults_core),
 	X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X,	&rapl_defaults_spr_server),
+	X86_MATCH_INTEL_FAM6_MODEL(LAKEFIELD,		&rapl_defaults_core),
 
 	X86_MATCH_INTEL_FAM6_MODEL(ATOM_SILVERMONT,	&rapl_defaults_byt),
 	X86_MATCH_INTEL_FAM6_MODEL(ATOM_AIRMONT,	&rapl_defaults_cht),
-- 
GitLab


From ec0972adecb391a8d8650832263a4790f3bfb4df Mon Sep 17 00:00:00 2001
From: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date: Fri, 11 Sep 2020 07:57:06 +0900
Subject: [PATCH 1262/1341] fbcon: Fix user font detection test at
 fbcon_resize().

syzbot is reporting OOB read at fbcon_resize() [1], for
commit 39b3cffb8cf31117 ("fbcon: prevent user font height or width change
 from causing potential out-of-bounds access") is by error using
registered_fb[con2fb_map[vc->vc_num]]->fbcon_par->p->userfont (which was
set to non-zero) instead of fb_display[vc->vc_num].userfont (which remains
zero for that display).

We could remove tricky userfont flag [2], for we can determine it by
comparing address of the font data and addresses of built-in font data.
But since that commit is failing to fix the original OOB read [3], this
patch keeps the change minimal in case we decide to revert altogether.

[1] https://syzkaller.appspot.com/bug?id=ebcbbb6576958a496500fee9cf7aa83ea00b5920
[2] https://syzkaller.appspot.com/text?tag=Patch&x=14030853900000
[3] https://syzkaller.appspot.com/bug?id=6fba8c186d97cf1011ab17660e633b1cc4e080c9

Reported-by: syzbot <syzbot+b38b1ef6edf0c74a8d97@syzkaller.appspotmail.com>
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Fixes: 39b3cffb8cf31117 ("fbcon: prevent user font height or width change from causing potential out-of-bounds access")
Cc: George Kennedy <george.kennedy@oracle.com>
Link: https://lore.kernel.org/r/f6e3e611-8704-1263-d163-f52c906a4f06@I-love.SAKURA.ne.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/video/fbdev/core/fbcon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 66167830fefd1..dae7ae7f225ae 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -2203,7 +2203,7 @@ static int fbcon_resize(struct vc_data *vc, unsigned int width,
 	struct fb_var_screeninfo var = info->var;
 	int x_diff, y_diff, virt_w, virt_h, virt_fw, virt_fh;
 
-	if (ops->p && ops->p->userfont && FNTSIZE(vc->vc_font.data)) {
+	if (p->userfont && FNTSIZE(vc->vc_font.data)) {
 		int size;
 		int pitch = PITCH(vc->vc_font.width);
 
-- 
GitLab


From ce9c13f31b10560d4e4d801f9f94895f595756aa Mon Sep 17 00:00:00 2001
From: Qi Liu <liuqi115@huawei.com>
Date: Wed, 16 Sep 2020 18:48:51 +0800
Subject: [PATCH 1263/1341] perf stat: Fix the ratio comments of miss-events

'perf stat' displays miss ratio of L1-dcache, L1-icache, dTLB cache,
iTLB cache and LL-cache. Take L1-dcache for example, miss ratio is
caculated as "L1-dcache-load-misses/L1-dcache-loads". So "of all
L1-dcache hits" is unsuitable to describe it, and "of all L1-dcache
accesses" seems better.

The comments of L1-icache, dTLB cache, iTLB cache and LL-cache are
fixed in the same way.

Signed-off-by: Qi Liu <liuqi115@huawei.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Cc: linuxarm@huawei.com
Link: http://lore.kernel.org/lkml/1600253331-10535-1-git-send-email-liuqi115@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/stat-shadow.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/tools/perf/util/stat-shadow.c b/tools/perf/util/stat-shadow.c
index a5f42c22c4846..924b54d15d540 100644
--- a/tools/perf/util/stat-shadow.c
+++ b/tools/perf/util/stat-shadow.c
@@ -517,7 +517,7 @@ static void print_l1_dcache_misses(struct perf_stat_config *config,
 
 	color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 
-	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-dcache hits", ratio);
+	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-dcache accesses", ratio);
 }
 
 static void print_l1_icache_misses(struct perf_stat_config *config,
@@ -538,7 +538,7 @@ static void print_l1_icache_misses(struct perf_stat_config *config,
 		ratio = avg / total * 100.0;
 
 	color = get_ratio_color(GRC_CACHE_MISSES, ratio);
-	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-icache hits", ratio);
+	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all L1-icache accesses", ratio);
 }
 
 static void print_dtlb_cache_misses(struct perf_stat_config *config,
@@ -558,7 +558,7 @@ static void print_dtlb_cache_misses(struct perf_stat_config *config,
 		ratio = avg / total * 100.0;
 
 	color = get_ratio_color(GRC_CACHE_MISSES, ratio);
-	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all dTLB cache hits", ratio);
+	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all dTLB cache accesses", ratio);
 }
 
 static void print_itlb_cache_misses(struct perf_stat_config *config,
@@ -578,7 +578,7 @@ static void print_itlb_cache_misses(struct perf_stat_config *config,
 		ratio = avg / total * 100.0;
 
 	color = get_ratio_color(GRC_CACHE_MISSES, ratio);
-	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all iTLB cache hits", ratio);
+	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all iTLB cache accesses", ratio);
 }
 
 static void print_ll_cache_misses(struct perf_stat_config *config,
@@ -598,7 +598,7 @@ static void print_ll_cache_misses(struct perf_stat_config *config,
 		ratio = avg / total * 100.0;
 
 	color = get_ratio_color(GRC_CACHE_MISSES, ratio);
-	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all LL-cache hits", ratio);
+	out->print_metric(config, out->ctx, color, "%7.2f%%", "of all LL-cache accesses", ratio);
 }
 
 /*
@@ -920,7 +920,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
 		if (runtime_stat_n(st, STAT_L1_DCACHE, ctx, cpu) != 0)
 			print_l1_dcache_misses(config, cpu, evsel, avg, out, st);
 		else
-			print_metric(config, ctxp, NULL, NULL, "of all L1-dcache hits", 0);
+			print_metric(config, ctxp, NULL, NULL, "of all L1-dcache accesses", 0);
 	} else if (
 		evsel->core.attr.type == PERF_TYPE_HW_CACHE &&
 		evsel->core.attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
@@ -930,7 +930,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
 		if (runtime_stat_n(st, STAT_L1_ICACHE, ctx, cpu) != 0)
 			print_l1_icache_misses(config, cpu, evsel, avg, out, st);
 		else
-			print_metric(config, ctxp, NULL, NULL, "of all L1-icache hits", 0);
+			print_metric(config, ctxp, NULL, NULL, "of all L1-icache accesses", 0);
 	} else if (
 		evsel->core.attr.type == PERF_TYPE_HW_CACHE &&
 		evsel->core.attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
@@ -940,7 +940,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
 		if (runtime_stat_n(st, STAT_DTLB_CACHE, ctx, cpu) != 0)
 			print_dtlb_cache_misses(config, cpu, evsel, avg, out, st);
 		else
-			print_metric(config, ctxp, NULL, NULL, "of all dTLB cache hits", 0);
+			print_metric(config, ctxp, NULL, NULL, "of all dTLB cache accesses", 0);
 	} else if (
 		evsel->core.attr.type == PERF_TYPE_HW_CACHE &&
 		evsel->core.attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
@@ -950,7 +950,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
 		if (runtime_stat_n(st, STAT_ITLB_CACHE, ctx, cpu) != 0)
 			print_itlb_cache_misses(config, cpu, evsel, avg, out, st);
 		else
-			print_metric(config, ctxp, NULL, NULL, "of all iTLB cache hits", 0);
+			print_metric(config, ctxp, NULL, NULL, "of all iTLB cache accesses", 0);
 	} else if (
 		evsel->core.attr.type == PERF_TYPE_HW_CACHE &&
 		evsel->core.attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
@@ -960,7 +960,7 @@ void perf_stat__print_shadow_stats(struct perf_stat_config *config,
 		if (runtime_stat_n(st, STAT_LL_CACHE, ctx, cpu) != 0)
 			print_ll_cache_misses(config, cpu, evsel, avg, out, st);
 		else
-			print_metric(config, ctxp, NULL, NULL, "of all LL-cache hits", 0);
+			print_metric(config, ctxp, NULL, NULL, "of all LL-cache accesses", 0);
 	} else if (evsel__match(evsel, HARDWARE, HW_CACHE_MISSES)) {
 		total = runtime_stat_avg(st, STAT_CACHEREFS, ctx, cpu);
 
-- 
GitLab


From e6b1a44eccfcab5e5e280be376f65478c3b2c7a2 Mon Sep 17 00:00:00 2001
From: Hou Tao <houtao1@huawei.com>
Date: Tue, 15 Sep 2020 22:07:50 +0800
Subject: [PATCH 1264/1341] locking/percpu-rwsem: Use this_cpu_{inc,dec}() for
 read_count

The __this_cpu*() accessors are (in general) IRQ-unsafe which, given
that percpu-rwsem is a blocking primitive, should be just fine.

However, file_end_write() is used from IRQ context and will cause
load-store issues on architectures where the per-cpu accessors are not
natively irq-safe.

Fix it by using the IRQ-safe this_cpu_*() for operations on
read_count. This will generate more expensive code on a number of
platforms, which might cause a performance regression for some of the
other percpu-rwsem users.

If any such is reported, we can consider alternative solutions.

Fixes: 70fe2f48152e ("aio: fix freeze protection of aio writes")
Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Link: https://lkml.kernel.org/r/20200915140750.137881-1-houtao1@huawei.com
---
 include/linux/percpu-rwsem.h  | 8 ++++----
 kernel/locking/percpu-rwsem.c | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h
index 5e033fe1ff4e9..5fda40f97fe91 100644
--- a/include/linux/percpu-rwsem.h
+++ b/include/linux/percpu-rwsem.h
@@ -60,7 +60,7 @@ static inline void percpu_down_read(struct percpu_rw_semaphore *sem)
 	 * anything we did within this RCU-sched read-size critical section.
 	 */
 	if (likely(rcu_sync_is_idle(&sem->rss)))
-		__this_cpu_inc(*sem->read_count);
+		this_cpu_inc(*sem->read_count);
 	else
 		__percpu_down_read(sem, false); /* Unconditional memory barrier */
 	/*
@@ -79,7 +79,7 @@ static inline bool percpu_down_read_trylock(struct percpu_rw_semaphore *sem)
 	 * Same as in percpu_down_read().
 	 */
 	if (likely(rcu_sync_is_idle(&sem->rss)))
-		__this_cpu_inc(*sem->read_count);
+		this_cpu_inc(*sem->read_count);
 	else
 		ret = __percpu_down_read(sem, true); /* Unconditional memory barrier */
 	preempt_enable();
@@ -103,7 +103,7 @@ static inline void percpu_up_read(struct percpu_rw_semaphore *sem)
 	 * Same as in percpu_down_read().
 	 */
 	if (likely(rcu_sync_is_idle(&sem->rss))) {
-		__this_cpu_dec(*sem->read_count);
+		this_cpu_dec(*sem->read_count);
 	} else {
 		/*
 		 * slowpath; reader will only ever wake a single blocked
@@ -115,7 +115,7 @@ static inline void percpu_up_read(struct percpu_rw_semaphore *sem)
 		 * aggregate zero, as that is the only time it matters) they
 		 * will also see our critical section.
 		 */
-		__this_cpu_dec(*sem->read_count);
+		this_cpu_dec(*sem->read_count);
 		rcuwait_wake_up(&sem->writer);
 	}
 	preempt_enable();
diff --git a/kernel/locking/percpu-rwsem.c b/kernel/locking/percpu-rwsem.c
index 8bbafe3e5203d..70a32a576f3f2 100644
--- a/kernel/locking/percpu-rwsem.c
+++ b/kernel/locking/percpu-rwsem.c
@@ -45,7 +45,7 @@ EXPORT_SYMBOL_GPL(percpu_free_rwsem);
 
 static bool __percpu_down_read_trylock(struct percpu_rw_semaphore *sem)
 {
-	__this_cpu_inc(*sem->read_count);
+	this_cpu_inc(*sem->read_count);
 
 	/*
 	 * Due to having preemption disabled the decrement happens on
@@ -71,7 +71,7 @@ static bool __percpu_down_read_trylock(struct percpu_rw_semaphore *sem)
 	if (likely(!atomic_read_acquire(&sem->block)))
 		return true;
 
-	__this_cpu_dec(*sem->read_count);
+	this_cpu_dec(*sem->read_count);
 
 	/* Prod writer to re-evaluate readers_active_check() */
 	rcuwait_wake_up(&sem->writer);
-- 
GitLab


From aa6b43d57f995f6eec0e9e744dcb200e09ecb8e0 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Tue, 15 Sep 2020 12:31:58 +0200
Subject: [PATCH 1265/1341] ACPI: processor: Use CPUIDLE_FLAG_TIMER_STOP

Make acpi_processor_idle use the common broadcast code, there's no
reason not to. This also removes some RCU usage after
rcu_idle_enter().

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reported-by: Borislav Petkov <bp@suse.de>
Tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/processor_idle.c | 47 +++++++++++------------------------
 1 file changed, 15 insertions(+), 32 deletions(-)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 71a30b0d0f05a..01ea986b61973 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -161,18 +161,10 @@ static void lapic_timer_propagate_broadcast(struct acpi_processor *pr)
 }
 
 /* Power(C) State timer broadcast control */
-static void lapic_timer_state_broadcast(struct acpi_processor *pr,
-				       struct acpi_processor_cx *cx,
-				       int broadcast)
+static bool lapic_timer_needs_broadcast(struct acpi_processor *pr,
+					struct acpi_processor_cx *cx)
 {
-	int state = cx - pr->power.states;
-
-	if (state >= pr->power.timer_broadcast_on_state) {
-		if (broadcast)
-			tick_broadcast_enter();
-		else
-			tick_broadcast_exit();
-	}
+	return cx - pr->power.states >= pr->power.timer_broadcast_on_state;
 }
 
 #else
@@ -180,9 +172,9 @@ static void lapic_timer_state_broadcast(struct acpi_processor *pr,
 static void lapic_timer_check_state(int state, struct acpi_processor *pr,
 				   struct acpi_processor_cx *cstate) { }
 static void lapic_timer_propagate_broadcast(struct acpi_processor *pr) { }
-static void lapic_timer_state_broadcast(struct acpi_processor *pr,
-				       struct acpi_processor_cx *cx,
-				       int broadcast)
+
+static bool lapic_timer_needs_broadcast(struct acpi_processor *pr,
+					struct acpi_processor_cx *cx)
 {
 }
 
@@ -568,20 +560,12 @@ static DEFINE_RAW_SPINLOCK(c3_lock);
  * acpi_idle_enter_bm - enters C3 with proper BM handling
  * @pr: Target processor
  * @cx: Target state context
- * @timer_bc: Whether or not to change timer mode to broadcast
  */
 static void acpi_idle_enter_bm(struct acpi_processor *pr,
-			       struct acpi_processor_cx *cx, bool timer_bc)
+			       struct acpi_processor_cx *cx)
 {
 	acpi_unlazy_tlb(smp_processor_id());
 
-	/*
-	 * Must be done before busmaster disable as we might need to
-	 * access HPET !
-	 */
-	if (timer_bc)
-		lapic_timer_state_broadcast(pr, cx, 1);
-
 	/*
 	 * disable bus master
 	 * bm_check implies we need ARB_DIS
@@ -609,9 +593,6 @@ static void acpi_idle_enter_bm(struct acpi_processor *pr,
 		c3_cpu_count--;
 		raw_spin_unlock(&c3_lock);
 	}
-
-	if (timer_bc)
-		lapic_timer_state_broadcast(pr, cx, 0);
 }
 
 static int acpi_idle_enter(struct cpuidle_device *dev,
@@ -630,7 +611,7 @@ static int acpi_idle_enter(struct cpuidle_device *dev,
 			cx = per_cpu(acpi_cstate[index], dev->cpu);
 		} else if (cx->type == ACPI_STATE_C3 && pr->flags.bm_check) {
 			if (cx->bm_sts_skip || !acpi_idle_bm_check()) {
-				acpi_idle_enter_bm(pr, cx, true);
+				acpi_idle_enter_bm(pr, cx);
 				return index;
 			} else if (drv->safe_state_index >= 0) {
 				index = drv->safe_state_index;
@@ -642,15 +623,11 @@ static int acpi_idle_enter(struct cpuidle_device *dev,
 		}
 	}
 
-	lapic_timer_state_broadcast(pr, cx, 1);
-
 	if (cx->type == ACPI_STATE_C3)
 		ACPI_FLUSH_CPU_CACHE();
 
 	acpi_idle_do_entry(cx);
 
-	lapic_timer_state_broadcast(pr, cx, 0);
-
 	return index;
 }
 
@@ -666,7 +643,7 @@ static int acpi_idle_enter_s2idle(struct cpuidle_device *dev,
 			return 0;
 
 		if (pr->flags.bm_check) {
-			acpi_idle_enter_bm(pr, cx, false);
+			acpi_idle_enter_bm(pr, cx);
 			return 0;
 		} else {
 			ACPI_FLUSH_CPU_CACHE();
@@ -682,6 +659,7 @@ static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr,
 {
 	int i, count = ACPI_IDLE_STATE_START;
 	struct acpi_processor_cx *cx;
+	struct cpuidle_state *state;
 
 	if (max_cstate == 0)
 		max_cstate = 1;
@@ -694,6 +672,11 @@ static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr,
 
 		per_cpu(acpi_cstate[count], dev->cpu) = cx;
 
+		if (lapic_timer_needs_broadcast(pr, cx)) {
+			state = &acpi_idle_driver.states[count];
+			state->flags |= CPUIDLE_FLAG_TIMER_STOP;
+		}
+
 		count++;
 		if (count == CPUIDLE_STATE_MAX)
 			break;
-- 
GitLab


From a889a23a98fee183c9b6b0b14b2fd70583429c5e Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Tue, 15 Sep 2020 12:31:59 +0200
Subject: [PATCH 1266/1341] ACPI: processor: Use CPUIDLE_FLAG_TLB_FLUSHED

Make acpi_processor_idle() use the generic TLB flushing code.
This again removes RCU usage after rcu_idle_enter().

(XXX make every C3 invalidate TLBs, not just C3-BM)

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 arch/ia64/include/asm/acpi.h  |  2 --
 arch/x86/include/asm/acpi.h   |  2 --
 drivers/acpi/processor_idle.c | 10 +++++-----
 3 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/arch/ia64/include/asm/acpi.h b/arch/ia64/include/asm/acpi.h
index b66ba907019ce..87927eb824ccd 100644
--- a/arch/ia64/include/asm/acpi.h
+++ b/arch/ia64/include/asm/acpi.h
@@ -74,8 +74,6 @@ static inline void arch_acpi_set_pdc_bits(u32 *buf)
 	buf[2] |= ACPI_PDC_EST_CAPABILITY_SMP;
 }
 
-#define acpi_unlazy_tlb(x)
-
 #ifdef CONFIG_ACPI_NUMA
 extern cpumask_t early_cpu_possible_map;
 #define for_each_possible_early_cpu(cpu)  \
diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index ca0976456a6b0..6d2df1ee427b9 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -159,8 +159,6 @@ static inline u64 x86_default_get_root_pointer(void)
 extern int x86_acpi_numa_init(void);
 #endif /* CONFIG_ACPI_NUMA */
 
-#define acpi_unlazy_tlb(x)	leave_mm(x)
-
 #ifdef CONFIG_ACPI_APEI
 static inline pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr)
 {
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 01ea986b61973..9ec504067f984 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -564,8 +564,6 @@ static DEFINE_RAW_SPINLOCK(c3_lock);
 static void acpi_idle_enter_bm(struct acpi_processor *pr,
 			       struct acpi_processor_cx *cx)
 {
-	acpi_unlazy_tlb(smp_processor_id());
-
 	/*
 	 * disable bus master
 	 * bm_check implies we need ARB_DIS
@@ -665,6 +663,7 @@ static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr,
 		max_cstate = 1;
 
 	for (i = 1; i < ACPI_PROCESSOR_MAX_POWER && i <= max_cstate; i++) {
+		state = &acpi_idle_driver.states[count];
 		cx = &pr->power.states[i];
 
 		if (!cx->valid)
@@ -672,10 +671,11 @@ static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr,
 
 		per_cpu(acpi_cstate[count], dev->cpu) = cx;
 
-		if (lapic_timer_needs_broadcast(pr, cx)) {
-			state = &acpi_idle_driver.states[count];
+		if (lapic_timer_needs_broadcast(pr, cx))
 			state->flags |= CPUIDLE_FLAG_TIMER_STOP;
-		}
+
+		if (cx->type == ACPI_STATE_C3)
+			state->flags |= CPUIDLE_FLAG_TLB_FLUSHED;
 
 		count++;
 		if (count == CPUIDLE_STATE_MAX)
-- 
GitLab


From 8747f2022fe8d8029193707ee86ff5c792cbef9b Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Tue, 15 Sep 2020 12:32:00 +0200
Subject: [PATCH 1267/1341] cpuidle: Allow cpuidle drivers to take over
 RCU-idle

Some drivers have to do significant work, some of which relies on RCU
still being active. Instead of using RCU_NONIDLE in the drivers and
flipping RCU back on, allow drivers to take over RCU-idle duty.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpuidle/cpuidle.c | 15 ++++++++++-----
 include/linux/cpuidle.h   |  1 +
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 04becd70cc41f..6c7e5621cf9a8 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -138,6 +138,7 @@ static void enter_s2idle_proper(struct cpuidle_driver *drv,
 				struct cpuidle_device *dev, int index)
 {
 	ktime_t time_start, time_end;
+	struct cpuidle_state *target_state = &drv->states[index];
 
 	time_start = ns_to_ktime(local_clock());
 
@@ -153,8 +154,9 @@ static void enter_s2idle_proper(struct cpuidle_driver *drv,
 	 * suspended is generally unsafe.
 	 */
 	stop_critical_timings();
-	rcu_idle_enter();
-	drv->states[index].enter_s2idle(dev, drv, index);
+	if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE))
+		rcu_idle_enter();
+	target_state->enter_s2idle(dev, drv, index);
 	if (WARN_ON_ONCE(!irqs_disabled()))
 		local_irq_disable();
 	/*
@@ -162,7 +164,8 @@ static void enter_s2idle_proper(struct cpuidle_driver *drv,
 	 * first CPU executing it calls functions containing RCU read-side
 	 * critical sections, so tell RCU about that.
 	 */
-	rcu_idle_exit();
+	if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE))
+		rcu_idle_exit();
 	tick_unfreeze();
 	start_critical_timings();
 
@@ -239,9 +242,11 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
 	time_start = ns_to_ktime(local_clock());
 
 	stop_critical_timings();
-	rcu_idle_enter();
+	if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE))
+		rcu_idle_enter();
 	entered_state = target_state->enter(dev, drv, index);
-	rcu_idle_exit();
+	if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE))
+		rcu_idle_exit();
 	start_critical_timings();
 
 	sched_clock_idle_wakeup_event();
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 75895e6363b89..6175c77bf25e7 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -82,6 +82,7 @@ struct cpuidle_state {
 #define CPUIDLE_FLAG_UNUSABLE		BIT(3) /* avoid using this state */
 #define CPUIDLE_FLAG_OFF		BIT(4) /* disable this state by default */
 #define CPUIDLE_FLAG_TLB_FLUSHED	BIT(5) /* idle-state flushes TLBs */
+#define CPUIDLE_FLAG_RCU_IDLE		BIT(6) /* idle-state takes care of RCU */
 
 struct cpuidle_device_kobj;
 struct cpuidle_state_kobj;
-- 
GitLab


From 1fecfdbb7acc6624655450a609221c89b5197a06 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Tue, 15 Sep 2020 12:32:01 +0200
Subject: [PATCH 1268/1341] ACPI: processor: Take over RCU-idle for C3-BM idle

The C3 BusMaster idle code takes lock in a number of places, some deep
inside the ACPI code. Instead of wrapping it all in RCU_NONIDLE, have
the driver take over RCU-idle duty and avoid flipping RCU state back
and forth a lot.

( by marking 'C3 && bm_check' as RCU_IDLE, we _must_ call enter_bm() for
  that combination, otherwise we'll loose RCU-idle, this requires
  shuffling some code around )

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/processor_idle.c | 69 +++++++++++++++++++++++++----------
 1 file changed, 49 insertions(+), 20 deletions(-)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 9ec504067f984..7ecb90e90afde 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -558,22 +558,43 @@ static DEFINE_RAW_SPINLOCK(c3_lock);
 
 /**
  * acpi_idle_enter_bm - enters C3 with proper BM handling
+ * @drv: cpuidle driver
  * @pr: Target processor
  * @cx: Target state context
+ * @index: index of target state
  */
-static void acpi_idle_enter_bm(struct acpi_processor *pr,
-			       struct acpi_processor_cx *cx)
+static int acpi_idle_enter_bm(struct cpuidle_driver *drv,
+			       struct acpi_processor *pr,
+			       struct acpi_processor_cx *cx,
+			       int index)
 {
+	static struct acpi_processor_cx safe_cx = {
+		.entry_method = ACPI_CSTATE_HALT,
+	};
+
 	/*
 	 * disable bus master
 	 * bm_check implies we need ARB_DIS
 	 * bm_control implies whether we can do ARB_DIS
 	 *
-	 * That leaves a case where bm_check is set and bm_control is
-	 * not set. In that case we cannot do much, we enter C3
-	 * without doing anything.
+	 * That leaves a case where bm_check is set and bm_control is not set.
+	 * In that case we cannot do much, we enter C3 without doing anything.
 	 */
-	if (pr->flags.bm_control) {
+	bool dis_bm = pr->flags.bm_control;
+
+	/* If we can skip BM, demote to a safe state. */
+	if (!cx->bm_sts_skip && acpi_idle_bm_check()) {
+		dis_bm = false;
+		index = drv->safe_state_index;
+		if (index >= 0) {
+			cx = this_cpu_read(acpi_cstate[index]);
+		} else {
+			cx = &safe_cx;
+			index = -EBUSY;
+		}
+	}
+
+	if (dis_bm) {
 		raw_spin_lock(&c3_lock);
 		c3_cpu_count++;
 		/* Disable bus master arbitration when all CPUs are in C3 */
@@ -582,15 +603,21 @@ static void acpi_idle_enter_bm(struct acpi_processor *pr,
 		raw_spin_unlock(&c3_lock);
 	}
 
+	rcu_idle_enter();
+
 	acpi_idle_do_entry(cx);
 
+	rcu_idle_exit();
+
 	/* Re-enable bus master arbitration */
-	if (pr->flags.bm_control) {
+	if (dis_bm) {
 		raw_spin_lock(&c3_lock);
 		acpi_write_bit_register(ACPI_BITREG_ARB_DISABLE, 0);
 		c3_cpu_count--;
 		raw_spin_unlock(&c3_lock);
 	}
+
+	return index;
 }
 
 static int acpi_idle_enter(struct cpuidle_device *dev,
@@ -604,20 +631,13 @@ static int acpi_idle_enter(struct cpuidle_device *dev,
 		return -EINVAL;
 
 	if (cx->type != ACPI_STATE_C1) {
+		if (cx->type == ACPI_STATE_C3 && pr->flags.bm_check)
+			return acpi_idle_enter_bm(drv, pr, cx, index);
+
+		/* C2 to C1 demotion. */
 		if (acpi_idle_fallback_to_c1(pr) && num_online_cpus() > 1) {
 			index = ACPI_IDLE_STATE_START;
 			cx = per_cpu(acpi_cstate[index], dev->cpu);
-		} else if (cx->type == ACPI_STATE_C3 && pr->flags.bm_check) {
-			if (cx->bm_sts_skip || !acpi_idle_bm_check()) {
-				acpi_idle_enter_bm(pr, cx);
-				return index;
-			} else if (drv->safe_state_index >= 0) {
-				index = drv->safe_state_index;
-				cx = per_cpu(acpi_cstate[index], dev->cpu);
-			} else {
-				acpi_safe_halt();
-				return -EBUSY;
-			}
 		}
 	}
 
@@ -641,7 +661,13 @@ static int acpi_idle_enter_s2idle(struct cpuidle_device *dev,
 			return 0;
 
 		if (pr->flags.bm_check) {
-			acpi_idle_enter_bm(pr, cx);
+			u8 bm_sts_skip = cx->bm_sts_skip;
+
+			/* Don't check BM_STS, do an unconditional ARB_DIS for S2IDLE */
+			cx->bm_sts_skip = 1;
+			acpi_idle_enter_bm(drv, pr, cx, index);
+			cx->bm_sts_skip = bm_sts_skip;
+
 			return 0;
 		} else {
 			ACPI_FLUSH_CPU_CACHE();
@@ -674,8 +700,11 @@ static int acpi_processor_setup_cpuidle_cx(struct acpi_processor *pr,
 		if (lapic_timer_needs_broadcast(pr, cx))
 			state->flags |= CPUIDLE_FLAG_TIMER_STOP;
 
-		if (cx->type == ACPI_STATE_C3)
+		if (cx->type == ACPI_STATE_C3) {
 			state->flags |= CPUIDLE_FLAG_TLB_FLUSHED;
+			if (pr->flags.bm_check)
+				state->flags |= CPUIDLE_FLAG_RCU_IDLE;
+		}
 
 		count++;
 		if (count == CPUIDLE_STATE_MAX)
-- 
GitLab


From 6279e774b0e4abfab20ff6cfaff99e752a32f27a Mon Sep 17 00:00:00 2001
From: Leon Romanovsky <leonro@nvidia.com>
Date: Tue, 15 Sep 2020 11:27:41 +0300
Subject: [PATCH 1269/1341] MAINTAINERS: Fix Max's and Shravan's emails

Max's and Shravan's usernames were changed while @mellanox.com emails
were transferred to be @nvidia.com.

Fixes: f6da70d99c96 ("MAINTAINERS: Update Mellanox and Cumulus Network addresses to new domain")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 MAINTAINERS | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index 0d0862b19ce5d..d746519253c3a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6180,7 +6180,7 @@ F:	Documentation/devicetree/bindings/edac/aspeed-sdram-edac.txt
 F:	drivers/edac/aspeed_edac.c
 
 EDAC-BLUEFIELD
-M:	Shravan Kumar Ramani <sramani@nvidia.com>
+M:	Shravan Kumar Ramani <shravankr@nvidia.com>
 S:	Supported
 F:	drivers/edac/bluefield_edac.c
 
@@ -9251,7 +9251,7 @@ F:	drivers/firmware/iscsi_ibft*
 
 ISCSI EXTENSIONS FOR RDMA (ISER) INITIATOR
 M:	Sagi Grimberg <sagi@grimberg.me>
-M:	Max Gurtovoy <maxg@nvidia.com>
+M:	Max Gurtovoy <mgurtovoy@nvidia.com>
 L:	linux-rdma@vger.kernel.org
 S:	Supported
 W:	http://www.openfabrics.org
-- 
GitLab


From b959b97860d0fee8c8f6a3e641d3c2ad76eab6be Mon Sep 17 00:00:00 2001
From: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Date: Wed, 16 Sep 2020 15:54:37 +0200
Subject: [PATCH 1270/1341] MIPS: SNI: Fix spurious interrupts

On A20R machines the interrupt pending bits in cause register need to be
updated by requesting the chipset to do it. This needs to be done to
find the interrupt cause and after interrupt service. In
commit 0b888c7f3a03 ("MIPS: SNI: Convert to new irq_chip functions") the
function to do after service update got lost, which caused spurious
interrupts.

Fixes: 0b888c7f3a03 ("MIPS: SNI: Convert to new irq_chip functions")
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
---
 arch/mips/sni/a20r.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/mips/sni/a20r.c b/arch/mips/sni/a20r.c
index b09dc844985a8..eeeec18c420a6 100644
--- a/arch/mips/sni/a20r.c
+++ b/arch/mips/sni/a20r.c
@@ -143,7 +143,10 @@ static struct platform_device sc26xx_pdev = {
 	},
 };
 
-static u32 a20r_ack_hwint(void)
+/*
+ * Trigger chipset to update CPU's CAUSE IP field
+ */
+static u32 a20r_update_cause_ip(void)
 {
 	u32 status = read_c0_status();
 
@@ -205,12 +208,14 @@ static void a20r_hwint(void)
 	int irq;
 
 	clear_c0_status(IE_IRQ0);
-	status = a20r_ack_hwint();
+	status = a20r_update_cause_ip();
 	cause = read_c0_cause();
 
 	irq = ffs(((cause & status) >> 8) & 0xf8);
 	if (likely(irq > 0))
 		do_IRQ(SNI_A20R_IRQ_BASE + irq - 1);
+
+	a20r_update_cause_ip();
 	set_c0_status(IE_IRQ0);
 }
 
-- 
GitLab


From 855f3e08d5565811ab109d9c0f64ee11c24feabf Mon Sep 17 00:00:00 2001
From: Wang Hai <wanghai38@huawei.com>
Date: Wed, 19 Aug 2020 10:58:29 +0800
Subject: [PATCH 1271/1341] drm/mediatek: Remove duplicated include

Remove mtk_drm_ddp.h which is included more than once

Fixes: 9aef5867c86c ("drm/mediatek: drop use of drmP.h")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 040a8f393fe24..a34fd805ce6d9 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -27,7 +27,6 @@
 
 #include "mtk_drm_crtc.h"
 #include "mtk_drm_ddp.h"
-#include "mtk_drm_ddp.h"
 #include "mtk_drm_ddp_comp.h"
 #include "mtk_drm_drv.h"
 #include "mtk_drm_gem.h"
-- 
GitLab


From f85acdad07fe36b91f2244263a890bf372528326 Mon Sep 17 00:00:00 2001
From: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Date: Tue, 1 Sep 2020 07:39:52 +0800
Subject: [PATCH 1272/1341] drm/mediatek: Use CPU when fail to get cmdq event

Even though cmdq client is created successfully, without the cmdq event,
cmdq could not work correctly, so use CPU when fail to get cmdq event.

Fixes: 60fa8c13ab1a ("drm/mediatek: Move gce event property to mutex device node")
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
index 3fc5511330b9f..4d29568be3f53 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -831,13 +831,19 @@ int mtk_drm_crtc_create(struct drm_device *drm_dev,
 			drm_crtc_index(&mtk_crtc->base));
 		mtk_crtc->cmdq_client = NULL;
 	}
-	ret = of_property_read_u32_index(priv->mutex_node,
-					 "mediatek,gce-events",
-					 drm_crtc_index(&mtk_crtc->base),
-					 &mtk_crtc->cmdq_event);
-	if (ret)
-		dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
-			drm_crtc_index(&mtk_crtc->base));
+
+	if (mtk_crtc->cmdq_client) {
+		ret = of_property_read_u32_index(priv->mutex_node,
+						 "mediatek,gce-events",
+						 drm_crtc_index(&mtk_crtc->base),
+						 &mtk_crtc->cmdq_event);
+		if (ret) {
+			dev_dbg(dev, "mtk_crtc %d failed to get mediatek,gce-events property\n",
+				drm_crtc_index(&mtk_crtc->base));
+			cmdq_mbox_destroy(mtk_crtc->cmdq_client);
+			mtk_crtc->cmdq_client = NULL;
+		}
+	}
 #endif
 	return 0;
 }
-- 
GitLab


From d494c257271153633a05c11e6dec85ddfc7700ee Mon Sep 17 00:00:00 2001
From: Yu Kuai <yukuai3@huawei.com>
Date: Sat, 5 Sep 2020 16:30:58 +0800
Subject: [PATCH 1273/1341] drm/mediatek: Add missing put_device() call in
 mtk_ddp_comp_init()

if of_find_device_by_node() succeed, mtk_ddp_comp_init() doesn't have
a corresponding put_device(). Thus add put_device() to fix the exception
handling for this function implementation.

Fixes: d0afe37f5209 ("drm/mediatek: support CMDQ interface in ddp component")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 57c88de9a3293..526648885b97e 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -496,6 +496,7 @@ int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 	if (of_address_to_resource(node, 0, &res) != 0) {
 		dev_err(dev, "Missing reg in %s node\n", node->full_name);
+		put_device(&larb_pdev->dev);
 		return -EINVAL;
 	}
 	comp->regs_pa = res.start;
-- 
GitLab


From 64c194c00789889b0f9454f583712f079ba414ee Mon Sep 17 00:00:00 2001
From: Yu Kuai <yukuai3@huawei.com>
Date: Wed, 9 Sep 2020 16:49:42 +0800
Subject: [PATCH 1274/1341] drm/mediatek: Add exception handing in
 mtk_drm_probe() if component init fail

mtk_ddp_comp_init() is called in a loop in mtk_drm_probe(), if it
fail, previous successive init component is not proccessed.

Thus uninitialize valid component and put their device if component
init failed.

Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index a34fd805ce6d9..215f3f7979e0f 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -543,8 +543,13 @@ static int mtk_drm_probe(struct platform_device *pdev)
 	pm_runtime_disable(dev);
 err_node:
 	of_node_put(private->mutex_node);
-	for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
+	for (i = 0; i < DDP_COMPONENT_ID_MAX; i++) {
 		of_node_put(private->comp_node[i]);
+		if (private->ddp_comp[i]) {
+			put_device(private->ddp_comp[i]->larb_dev);
+			private->ddp_comp[i] = NULL;
+		}
+	}
 	return ret;
 }
 
-- 
GitLab


From 2132940f2192824acf160d115192755f7c58a847 Mon Sep 17 00:00:00 2001
From: Yu Kuai <yukuai3@huawei.com>
Date: Fri, 11 Sep 2020 19:21:19 +0800
Subject: [PATCH 1275/1341] drm/mediatek: Add missing put_device() call in
 mtk_drm_kms_init()

if of_find_device_by_node() succeed, mtk_drm_kms_init() doesn't have
a corresponding put_device(). Thus add jump target to fix the exception
handling for this function implementation.

Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 215f3f7979e0f..2d982740b1a4c 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -164,7 +164,7 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 
 	ret = drmm_mode_config_init(drm);
 	if (ret)
-		return ret;
+		goto put_mutex_dev;
 
 	drm->mode_config.min_width = 64;
 	drm->mode_config.min_height = 64;
@@ -181,7 +181,7 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 
 	ret = component_bind_all(drm->dev, drm);
 	if (ret)
-		return ret;
+		goto put_mutex_dev;
 
 	/*
 	 * We currently support two fixed data streams, each optional,
@@ -228,7 +228,7 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 	}
 	if (!dma_dev->dma_parms) {
 		ret = -ENOMEM;
-		goto err_component_unbind;
+		goto put_dma_dev;
 	}
 
 	ret = dma_set_max_seg_size(dma_dev, (unsigned int)DMA_BIT_MASK(32));
@@ -255,9 +255,12 @@ static int mtk_drm_kms_init(struct drm_device *drm)
 err_unset_dma_parms:
 	if (private->dma_parms_allocated)
 		dma_dev->dma_parms = NULL;
+put_dma_dev:
+	put_device(private->dma_dev);
 err_component_unbind:
 	component_unbind_all(drm->dev, drm);
-
+put_mutex_dev:
+	put_device(private->mutex_dev);
 	return ret;
 }
 
-- 
GitLab


From 0680a622318b8d657323b94082f4b9a44038dfee Mon Sep 17 00:00:00 2001
From: Yu Kuai <yukuai3@huawei.com>
Date: Fri, 11 Sep 2020 19:21:51 +0800
Subject: [PATCH 1276/1341] drm/mediatek: Add missing put_device() call in
 mtk_hdmi_dt_parse_pdata()

if of_find_device_by_node() succeed, mtk_drm_kms_init() doesn't have
a corresponding put_device(). Thus add jump target to fix the exception
handling for this function implementation.

Fixes: 8f83f26891e1 ("drm/mediatek: Add HDMI support")
Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_hdmi.c | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index f2e9b429960b9..a97725680d4ea 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1507,25 +1507,30 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
 		dev_err(dev,
 			"Failed to get system configuration registers: %d\n",
 			ret);
-		return ret;
+		goto put_device;
 	}
 	hdmi->sys_regmap = regmap;
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	hdmi->regs = devm_ioremap_resource(dev, mem);
-	if (IS_ERR(hdmi->regs))
-		return PTR_ERR(hdmi->regs);
+	if (IS_ERR(hdmi->regs)) {
+		ret = PTR_ERR(hdmi->regs);
+		goto put_device;
+	}
 
 	remote = of_graph_get_remote_node(np, 1, 0);
-	if (!remote)
-		return -EINVAL;
+	if (!remote) {
+		ret = -EINVAL;
+		goto put_device;
+	}
 
 	if (!of_device_is_compatible(remote, "hdmi-connector")) {
 		hdmi->next_bridge = of_drm_find_bridge(remote);
 		if (!hdmi->next_bridge) {
 			dev_err(dev, "Waiting for external bridge\n");
 			of_node_put(remote);
-			return -EPROBE_DEFER;
+			ret = -EPROBE_DEFER;
+			goto put_device;
 		}
 	}
 
@@ -1534,7 +1539,8 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
 		dev_err(dev, "Failed to find ddc-i2c-bus node in %pOF\n",
 			remote);
 		of_node_put(remote);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto put_device;
 	}
 	of_node_put(remote);
 
@@ -1542,10 +1548,14 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
 	of_node_put(i2c_np);
 	if (!hdmi->ddc_adpt) {
 		dev_err(dev, "Failed to get ddc i2c adapter by node\n");
-		return -EINVAL;
+		ret = -EINVAL;
+		goto put_device;
 	}
 
 	return 0;
+put_device:
+	put_device(hdmi->cec_dev);
+	return ret;
 }
 
 /*
-- 
GitLab


From e60c27f1ffc733e729319662f75419f4d4fb6a80 Mon Sep 17 00:00:00 2001
From: Jiansong Chen <Jiansong.Chen@amd.com>
Date: Wed, 16 Sep 2020 19:17:20 +0800
Subject: [PATCH 1277/1341] drm/amdgpu: declare ta firmware for navy_flounder

The firmware provided via MODULE_FIRMWARE appears in the
module information. External tools(eg. dracut) may use the
list of fw files to include them as appropriate in an initramfs,
thus missing declaration will lead to request firmware failure
in boot time.

Signed-off-by: Jiansong Chen <Jiansong.Chen@amd.com>
Reviewed-by: Tianci Yin <tianci.yin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/psp_v11_0.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c b/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
index e16874f30d5dc..6c5d9612abcb6 100644
--- a/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/psp_v11_0.c
@@ -58,7 +58,7 @@ MODULE_FIRMWARE("amdgpu/arcturus_ta.bin");
 MODULE_FIRMWARE("amdgpu/sienna_cichlid_sos.bin");
 MODULE_FIRMWARE("amdgpu/sienna_cichlid_ta.bin");
 MODULE_FIRMWARE("amdgpu/navy_flounder_sos.bin");
-MODULE_FIRMWARE("amdgpu/navy_flounder_asd.bin");
+MODULE_FIRMWARE("amdgpu/navy_flounder_ta.bin");
 
 /* address block */
 #define smnMP1_FIRMWARE_FLAGS		0x3010024
-- 
GitLab


From 875d369d8f75275d30e59421602d9366426abff7 Mon Sep 17 00:00:00 2001
From: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Date: Tue, 15 Sep 2020 17:26:29 -0400
Subject: [PATCH 1278/1341] drm/amd/display: Don't log hdcp module warnings in
 dmesg

[Why]
DTM topology updates happens by default now. This results in DTM
warnings when hdcp is not even being enabled. This spams the dmesg
and doesn't effect normal display functionality so it is better to log it
using DRM_DEBUG_KMS()

[How]
Change the DRM_WARN() to DRM_DEBUG_KMS()

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 drivers/gpu/drm/amd/display/modules/hdcp/hdcp_log.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_log.h b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_log.h
index d3192b9d0c3d8..47f8ee2832ff0 100644
--- a/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_log.h
+++ b/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_log.h
@@ -27,7 +27,7 @@
 #define MOD_HDCP_LOG_H_
 
 #ifdef CONFIG_DRM_AMD_DC_HDCP
-#define HDCP_LOG_ERR(hdcp, ...) DRM_WARN(__VA_ARGS__)
+#define HDCP_LOG_ERR(hdcp, ...) DRM_DEBUG_KMS(__VA_ARGS__)
 #define HDCP_LOG_VER(hdcp, ...) DRM_DEBUG_KMS(__VA_ARGS__)
 #define HDCP_LOG_FSM(hdcp, ...) DRM_DEBUG_KMS(__VA_ARGS__)
 #define HDCP_LOG_TOP(hdcp, ...) pr_debug("[HDCP_TOP]:"__VA_ARGS__)
-- 
GitLab


From 29231826f3bd65500118c473fccf31c0cf14dbc0 Mon Sep 17 00:00:00 2001
From: Quentin Perret <qperret@google.com>
Date: Wed, 16 Sep 2020 18:18:25 +0100
Subject: [PATCH 1279/1341] ehci-hcd: Move include to keep CRC stable

The CRC calculation done by genksyms is triggered when the parser hits
EXPORT_SYMBOL*() macros. At this point, genksyms recursively expands the
types of the function parameters, and uses that as the input for the CRC
calculation. In the case of forward-declared structs, the type expands
to 'UNKNOWN'. Following this, it appears that the result of the
expansion of each type is cached somewhere, and seems to be re-used
when/if the same type is seen again for another exported symbol in the
same C file.

Unfortunately, this can cause CRC 'stability' issues when a struct
definition becomes visible in the middle of a C file. For example, let's
assume code with the following pattern:

    struct foo;

    int bar(struct foo *arg)
    {
	/* Do work ... */
    }
    EXPORT_SYMBOL_GPL(bar);

    /* This contains struct foo's definition */
    #include "foo.h"

    int baz(struct foo *arg)
    {
	/* Do more work ... */
    }
    EXPORT_SYMBOL_GPL(baz);

Here, baz's CRC will be computed using the expansion of struct foo that
was cached after bar's CRC calculation ('UNKOWN' here). But if
EXPORT_SYMBOL_GPL(bar) is removed from the file (because of e.g. symbol
trimming using CONFIG_TRIM_UNUSED_KSYMS), struct foo will be expanded
late, during baz's CRC calculation, which now has visibility over the
full struct definition, hence resulting in a different CRC for baz.

The proper fix for this certainly is in genksyms, but that will take me
some time to get right. In the meantime, we have seen one occurrence of
this in the ehci-hcd code which hits this problem because of the way it
includes C files halfway through the code together with an unlucky mix
of symbol trimming.

In order to workaround this, move the include done in ehci-hub.c early
in ehci-hcd.c, hence making sure the struct definitions are visible to
the entire file. This improves CRC stability of the ehci-hcd exports
even when symbol trimming is enabled.

Acked-by: Alan Stern <stern@rowland.harvard.edu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Link: https://lore.kernel.org/r/20200916171825.3228122-1-qperret@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/host/ehci-hcd.c | 1 +
 drivers/usb/host/ehci-hub.c | 1 -
 2 files changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 6257be4110ca2..3575b72018810 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -22,6 +22,7 @@
 #include <linux/interrupt.h>
 #include <linux/usb.h>
 #include <linux/usb/hcd.h>
+#include <linux/usb/otg.h>
 #include <linux/moduleparam.h>
 #include <linux/dma-mapping.h>
 #include <linux/debugfs.h>
diff --git a/drivers/usb/host/ehci-hub.c b/drivers/usb/host/ehci-hub.c
index ce0eaf7d7c12a..087402aec5cbe 100644
--- a/drivers/usb/host/ehci-hub.c
+++ b/drivers/usb/host/ehci-hub.c
@@ -14,7 +14,6 @@
  */
 
 /*-------------------------------------------------------------------------*/
-#include <linux/usb/otg.h>
 
 #define	PORT_WAKE_BITS	(PORT_WKOC_E|PORT_WKDISC_E|PORT_WKCONN_E)
 
-- 
GitLab


From 32f6865c7aa3c422f710903baa6eb81abc6f559b Mon Sep 17 00:00:00 2001
From: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Date: Thu, 17 Sep 2020 11:49:25 +0300
Subject: [PATCH 1280/1341] arm64: bpf: Fix branch offset in JIT

Running the eBPF test_verifier leads to random errors looking like this:

[ 6525.735488] Unexpected kernel BRK exception at EL1
[ 6525.735502] Internal error: ptrace BRK handler: f2000100 [#1] SMP
[ 6525.741609] Modules linked in: nls_utf8 cifs libdes libarc4 dns_resolver fscache binfmt_misc nls_ascii nls_cp437 vfat fat aes_ce_blk crypto_simd cryptd aes_ce_cipher ghash_ce gf128mul efi_pstore sha2_ce sha256_arm64 sha1_ce evdev efivars efivarfs ip_tables x_tables autofs4 btrfs blake2b_generic xor xor_neon zstd_compress raid6_pq libcrc32c crc32c_generic ahci xhci_pci libahci xhci_hcd igb libata i2c_algo_bit nvme realtek usbcore nvme_core scsi_mod t10_pi netsec mdio_devres of_mdio gpio_keys fixed_phy libphy gpio_mb86s7x
[ 6525.787760] CPU: 3 PID: 7881 Comm: test_verifier Tainted: G        W         5.9.0-rc1+ #47
[ 6525.796111] Hardware name: Socionext SynQuacer E-series DeveloperBox, BIOS build #1 Jun  6 2020
[ 6525.804812] pstate: 20000005 (nzCv daif -PAN -UAO BTYPE=--)
[ 6525.810390] pc : bpf_prog_c3d01833289b6311_F+0xc8/0x9f4
[ 6525.815613] lr : bpf_prog_d53bb52e3f4483f9_F+0x38/0xc8c
[ 6525.820832] sp : ffff8000130cbb80
[ 6525.824141] x29: ffff8000130cbbb0 x28: 0000000000000000
[ 6525.829451] x27: 000005ef6fcbf39b x26: 0000000000000000
[ 6525.834759] x25: ffff8000130cbb80 x24: ffff800011dc7038
[ 6525.840067] x23: ffff8000130cbd00 x22: ffff0008f624d080
[ 6525.845375] x21: 0000000000000001 x20: ffff800011dc7000
[ 6525.850682] x19: 0000000000000000 x18: 0000000000000000
[ 6525.855990] x17: 0000000000000000 x16: 0000000000000000
[ 6525.861298] x15: 0000000000000000 x14: 0000000000000000
[ 6525.866606] x13: 0000000000000000 x12: 0000000000000000
[ 6525.871913] x11: 0000000000000001 x10: ffff8000000a660c
[ 6525.877220] x9 : ffff800010951810 x8 : ffff8000130cbc38
[ 6525.882528] x7 : 0000000000000000 x6 : 0000009864cfa881
[ 6525.887836] x5 : 00ffffffffffffff x4 : 002880ba1a0b3e9f
[ 6525.893144] x3 : 0000000000000018 x2 : ffff8000000a4374
[ 6525.898452] x1 : 000000000000000a x0 : 0000000000000009
[ 6525.903760] Call trace:
[ 6525.906202]  bpf_prog_c3d01833289b6311_F+0xc8/0x9f4
[ 6525.911076]  bpf_prog_d53bb52e3f4483f9_F+0x38/0xc8c
[ 6525.915957]  bpf_dispatcher_xdp_func+0x14/0x20
[ 6525.920398]  bpf_test_run+0x70/0x1b0
[ 6525.923969]  bpf_prog_test_run_xdp+0xec/0x190
[ 6525.928326]  __do_sys_bpf+0xc88/0x1b28
[ 6525.932072]  __arm64_sys_bpf+0x24/0x30
[ 6525.935820]  el0_svc_common.constprop.0+0x70/0x168
[ 6525.940607]  do_el0_svc+0x28/0x88
[ 6525.943920]  el0_sync_handler+0x88/0x190
[ 6525.947838]  el0_sync+0x140/0x180
[ 6525.951154] Code: d4202000 d4202000 d4202000 d4202000 (d4202000)
[ 6525.957249] ---[ end trace cecc3f93b14927e2 ]---

The reason is the offset[] creation and later usage, while building
the eBPF body. The code currently omits the first instruction, since
build_insn() will increase our ctx->idx before saving it.
That was fine up until bounded eBPF loops were introduced. After that
introduction, offset[0] must be the offset of the end of prologue which
is the start of the 1st insn while, offset[n] holds the
offset of the end of n-th insn.

When "taken loop with back jump to 1st insn" test runs, it will
eventually call bpf2a64_offset(-1, 2, ctx). Since negative indexing is
permitted, the current outcome depends on the value stored in
ctx->offset[-1], which has nothing to do with our array.
If the value happens to be 0 the tests will work. If not this error
triggers.

commit 7c2e988f400e ("bpf: fix x64 JIT code generation for jmp to 1st insn")
fixed an indentical bug on x86 when eBPF bounded loops were introduced.

So let's fix it by creating the ctx->offset[] differently. Track the
beginning of instruction and account for the extra instruction while
calculating the arm instruction offsets.

Fixes: 2589726d12a1 ("bpf: introduce bounded loops")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reported-by: Jiri Olsa <jolsa@kernel.org>
Co-developed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Co-developed-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Signed-off-by: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200917084925.177348-1-ilias.apalodimas@linaro.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/net/bpf_jit_comp.c | 43 +++++++++++++++++++++++++----------
 1 file changed, 31 insertions(+), 12 deletions(-)

diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c
index f8912e45be7ab..ef9f1d5e989d0 100644
--- a/arch/arm64/net/bpf_jit_comp.c
+++ b/arch/arm64/net/bpf_jit_comp.c
@@ -143,14 +143,17 @@ static inline void emit_addr_mov_i64(const int reg, const u64 val,
 	}
 }
 
-static inline int bpf2a64_offset(int bpf_to, int bpf_from,
+static inline int bpf2a64_offset(int bpf_insn, int off,
 				 const struct jit_ctx *ctx)
 {
-	int to = ctx->offset[bpf_to];
-	/* -1 to account for the Branch instruction */
-	int from = ctx->offset[bpf_from] - 1;
-
-	return to - from;
+	/* BPF JMP offset is relative to the next instruction */
+	bpf_insn++;
+	/*
+	 * Whereas arm64 branch instructions encode the offset
+	 * from the branch itself, so we must subtract 1 from the
+	 * instruction offset.
+	 */
+	return ctx->offset[bpf_insn + off] - (ctx->offset[bpf_insn] - 1);
 }
 
 static void jit_fill_hole(void *area, unsigned int size)
@@ -642,7 +645,7 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx,
 
 	/* JUMP off */
 	case BPF_JMP | BPF_JA:
-		jmp_offset = bpf2a64_offset(i + off, i, ctx);
+		jmp_offset = bpf2a64_offset(i, off, ctx);
 		check_imm26(jmp_offset);
 		emit(A64_B(jmp_offset), ctx);
 		break;
@@ -669,7 +672,7 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx,
 	case BPF_JMP32 | BPF_JSLE | BPF_X:
 		emit(A64_CMP(is64, dst, src), ctx);
 emit_cond_jmp:
-		jmp_offset = bpf2a64_offset(i + off, i, ctx);
+		jmp_offset = bpf2a64_offset(i, off, ctx);
 		check_imm19(jmp_offset);
 		switch (BPF_OP(code)) {
 		case BPF_JEQ:
@@ -908,10 +911,21 @@ static int build_body(struct jit_ctx *ctx, bool extra_pass)
 	const struct bpf_prog *prog = ctx->prog;
 	int i;
 
+	/*
+	 * - offset[0] offset of the end of prologue,
+	 *   start of the 1st instruction.
+	 * - offset[1] - offset of the end of 1st instruction,
+	 *   start of the 2nd instruction
+	 * [....]
+	 * - offset[3] - offset of the end of 3rd instruction,
+	 *   start of 4th instruction
+	 */
 	for (i = 0; i < prog->len; i++) {
 		const struct bpf_insn *insn = &prog->insnsi[i];
 		int ret;
 
+		if (ctx->image == NULL)
+			ctx->offset[i] = ctx->idx;
 		ret = build_insn(insn, ctx, extra_pass);
 		if (ret > 0) {
 			i++;
@@ -919,11 +933,16 @@ static int build_body(struct jit_ctx *ctx, bool extra_pass)
 				ctx->offset[i] = ctx->idx;
 			continue;
 		}
-		if (ctx->image == NULL)
-			ctx->offset[i] = ctx->idx;
 		if (ret)
 			return ret;
 	}
+	/*
+	 * offset is allocated with prog->len + 1 so fill in
+	 * the last element with the offset after the last
+	 * instruction (end of program)
+	 */
+	if (ctx->image == NULL)
+		ctx->offset[i] = ctx->idx;
 
 	return 0;
 }
@@ -1002,7 +1021,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
 	memset(&ctx, 0, sizeof(ctx));
 	ctx.prog = prog;
 
-	ctx.offset = kcalloc(prog->len, sizeof(int), GFP_KERNEL);
+	ctx.offset = kcalloc(prog->len + 1, sizeof(int), GFP_KERNEL);
 	if (ctx.offset == NULL) {
 		prog = orig_prog;
 		goto out_off;
@@ -1089,7 +1108,7 @@ struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)
 	prog->jited_len = prog_size;
 
 	if (!prog->is_func || extra_pass) {
-		bpf_prog_fill_jited_linfo(prog, ctx.offset);
+		bpf_prog_fill_jited_linfo(prog, ctx.offset + 1);
 out_off:
 		kfree(ctx.offset);
 		kfree(jit_data);
-- 
GitLab


From 9cdabcb3ef8c24ca3a456e4db7b012befb688e73 Mon Sep 17 00:00:00 2001
From: Oliver Neukum <oneukum@suse.com>
Date: Thu, 17 Sep 2020 12:34:27 +0200
Subject: [PATCH 1281/1341] usblp: fix race between disconnect() and read()

read() needs to check whether the device has been
disconnected before it tries to talk to the device.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Reported-by: syzbot+be5b5f86a162a6c281e6@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/20200917103427.15740-1-oneukum@suse.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/usb/class/usblp.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/usb/class/usblp.c b/drivers/usb/class/usblp.c
index 084c48c5848fc..67cbd42421bee 100644
--- a/drivers/usb/class/usblp.c
+++ b/drivers/usb/class/usblp.c
@@ -827,6 +827,11 @@ static ssize_t usblp_read(struct file *file, char __user *buffer, size_t len, lo
 	if (rv < 0)
 		return rv;
 
+	if (!usblp->present) {
+		count = -ENODEV;
+		goto done;
+	}
+
 	if ((avail = usblp->rstatus) < 0) {
 		printk(KERN_ERR "usblp%d: error %d reading from printer\n",
 		    usblp->minor, (int)avail);
-- 
GitLab


From 75df529bec9110dad43ab30e2d9490242529e8b8 Mon Sep 17 00:00:00 2001
From: Andrew Jones <drjones@redhat.com>
Date: Wed, 16 Sep 2020 17:45:30 +0200
Subject: [PATCH 1282/1341] arm64: paravirt: Initialize steal time when cpu is
 online

Steal time initialization requires mapping a memory region which
invokes a memory allocation. Doing this at CPU starting time results
in the following trace when CONFIG_DEBUG_ATOMIC_SLEEP is enabled:

BUG: sleeping function called from invalid context at mm/slab.h:498
in_atomic(): 1, irqs_disabled(): 128, non_block: 0, pid: 0, name: swapper/1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.9.0-rc5+ #1
Call trace:
 dump_backtrace+0x0/0x208
 show_stack+0x1c/0x28
 dump_stack+0xc4/0x11c
 ___might_sleep+0xf8/0x130
 __might_sleep+0x58/0x90
 slab_pre_alloc_hook.constprop.101+0xd0/0x118
 kmem_cache_alloc_node_trace+0x84/0x270
 __get_vm_area_node+0x88/0x210
 get_vm_area_caller+0x38/0x40
 __ioremap_caller+0x70/0xf8
 ioremap_cache+0x78/0xb0
 memremap+0x9c/0x1a8
 init_stolen_time_cpu+0x54/0xf0
 cpuhp_invoke_callback+0xa8/0x720
 notify_cpu_starting+0xc8/0xd8
 secondary_start_kernel+0x114/0x180
CPU1: Booted secondary processor 0x0000000001 [0x431f0a11]

However we don't need to initialize steal time at CPU starting time.
We can simply wait until CPU online time, just sacrificing a bit of
accuracy by returning zero for steal time until we know better.

While at it, add __init to the functions that are only called by
pv_time_init() which is __init.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Fixes: e0685fa228fd ("arm64: Retrieve stolen time as paravirtualized guest")
Cc: stable@vger.kernel.org
Reviewed-by: Steven Price <steven.price@arm.com>
Link: https://lore.kernel.org/r/20200916154530.40809-1-drjones@redhat.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
---
 arch/arm64/kernel/paravirt.c | 26 +++++++++++++++-----------
 include/linux/cpuhotplug.h   |  1 -
 2 files changed, 15 insertions(+), 12 deletions(-)

diff --git a/arch/arm64/kernel/paravirt.c b/arch/arm64/kernel/paravirt.c
index 295d66490584b..c07d7a0349410 100644
--- a/arch/arm64/kernel/paravirt.c
+++ b/arch/arm64/kernel/paravirt.c
@@ -50,16 +50,19 @@ static u64 pv_steal_clock(int cpu)
 	struct pv_time_stolen_time_region *reg;
 
 	reg = per_cpu_ptr(&stolen_time_region, cpu);
-	if (!reg->kaddr) {
-		pr_warn_once("stolen time enabled but not configured for cpu %d\n",
-			     cpu);
+
+	/*
+	 * paravirt_steal_clock() may be called before the CPU
+	 * online notification callback runs. Until the callback
+	 * has run we just return zero.
+	 */
+	if (!reg->kaddr)
 		return 0;
-	}
 
 	return le64_to_cpu(READ_ONCE(reg->kaddr->stolen_time));
 }
 
-static int stolen_time_dying_cpu(unsigned int cpu)
+static int stolen_time_cpu_down_prepare(unsigned int cpu)
 {
 	struct pv_time_stolen_time_region *reg;
 
@@ -73,7 +76,7 @@ static int stolen_time_dying_cpu(unsigned int cpu)
 	return 0;
 }
 
-static int init_stolen_time_cpu(unsigned int cpu)
+static int stolen_time_cpu_online(unsigned int cpu)
 {
 	struct pv_time_stolen_time_region *reg;
 	struct arm_smccc_res res;
@@ -103,19 +106,20 @@ static int init_stolen_time_cpu(unsigned int cpu)
 	return 0;
 }
 
-static int pv_time_init_stolen_time(void)
+static int __init pv_time_init_stolen_time(void)
 {
 	int ret;
 
-	ret = cpuhp_setup_state(CPUHP_AP_ARM_KVMPV_STARTING,
-				"hypervisor/arm/pvtime:starting",
-				init_stolen_time_cpu, stolen_time_dying_cpu);
+	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN,
+				"hypervisor/arm/pvtime:online",
+				stolen_time_cpu_online,
+				stolen_time_cpu_down_prepare);
 	if (ret < 0)
 		return ret;
 	return 0;
 }
 
-static bool has_pv_steal_clock(void)
+static bool __init has_pv_steal_clock(void)
 {
 	struct arm_smccc_res res;
 
diff --git a/include/linux/cpuhotplug.h b/include/linux/cpuhotplug.h
index 3215023d48523..bf9181cef444d 100644
--- a/include/linux/cpuhotplug.h
+++ b/include/linux/cpuhotplug.h
@@ -142,7 +142,6 @@ enum cpuhp_state {
 	/* Must be the last timer callback */
 	CPUHP_AP_DUMMY_TIMER_STARTING,
 	CPUHP_AP_ARM_XEN_STARTING,
-	CPUHP_AP_ARM_KVMPV_STARTING,
 	CPUHP_AP_ARM_CORESIGHT_STARTING,
 	CPUHP_AP_ARM_CORESIGHT_CTI_STARTING,
 	CPUHP_AP_ARM64_ISNDEP_STARTING,
-- 
GitLab


From 5ef64cc8987a9211d3f3667331ba3411a94ddc79 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 13 Sep 2020 14:05:35 -0700
Subject: [PATCH 1283/1341] mm: allow a controlled amount of unfairness in the
 page lock

Commit 2a9127fcf229 ("mm: rewrite wait_on_page_bit_common() logic") made
the page locking entirely fair, in that if a waiter came in while the
lock was held, the lock would be transferred to the lockers strictly in
order.

That was intended to finally get rid of the long-reported watchdog
failures that involved the page lock under extreme load, where a process
could end up waiting essentially forever, as other page lockers stole
the lock from under it.

It also improved some benchmarks, but it ended up causing huge
performance regressions on others, simply because fair lock behavior
doesn't end up giving out the lock as aggressively, causing better
worst-case latency, but potentially much worse average latencies and
throughput.

Instead of reverting that change entirely, this introduces a controlled
amount of unfairness, with a sysctl knob to tune it if somebody needs
to.  But the default value should hopefully be good for any normal load,
allowing a few rounds of lock stealing, but enforcing the strict
ordering before the lock has been stolen too many times.

There is also a hint from Matthieu Baerts that the fair page coloring
may end up exposing an ABBA deadlock that is hidden by the usual
optimistic lock stealing, and while the unfairness doesn't fix the
fundamental issue (and I'm still looking at that), it avoids it in
practice.

The amount of unfairness can be modified by writing a new value to the
'sysctl_page_lock_unfairness' variable (default value of 5, exposed
through /proc/sys/vm/page_lock_unfairness), but that is hopefully
something we'd use mainly for debugging rather than being necessary for
any deep system tuning.

This whole issue has exposed just how critical the page lock can be, and
how contended it gets under certain locks.  And the main contention
doesn't really seem to be anything related to IO (which was the origin
of this lock), but for things like just verifying that the page file
mapping is stable while faulting in the page into a page table.

Link: https://lore.kernel.org/linux-fsdevel/ed8442fd-6f54-dd84-cd4a-941e8b7ee603@MichaelLarabel.com/
Link: https://www.phoronix.com/scan.php?page=article&item=linux-50-59&num=1
Link: https://lore.kernel.org/linux-fsdevel/c560a38d-8313-51fb-b1ec-e904bd8836bc@tessares.net/
Reported-and-tested-by: Michael Larabel <Michael@michaellarabel.com>
Tested-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Chris Mason <clm@fb.com>
Cc: Jan Kara <jack@suse.cz>
Cc: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/mm.h   |   2 +
 include/linux/wait.h |   1 +
 kernel/sysctl.c      |   8 +++
 mm/filemap.c         | 160 ++++++++++++++++++++++++++++++++++---------
 4 files changed, 140 insertions(+), 31 deletions(-)

diff --git a/include/linux/mm.h b/include/linux/mm.h
index ca6e6a81576b9..b2f370f0b4208 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -41,6 +41,8 @@ struct writeback_control;
 struct bdi_writeback;
 struct pt_regs;
 
+extern int sysctl_page_lock_unfairness;
+
 void init_mm_internals(void);
 
 #ifndef CONFIG_NEED_MULTIPLE_NODES	/* Don't use mapnrs, do it properly */
diff --git a/include/linux/wait.h b/include/linux/wait.h
index 898c890fc153f..27fb99cfeb026 100644
--- a/include/linux/wait.h
+++ b/include/linux/wait.h
@@ -21,6 +21,7 @@ int default_wake_function(struct wait_queue_entry *wq_entry, unsigned mode, int
 #define WQ_FLAG_WOKEN		0x02
 #define WQ_FLAG_BOOKMARK	0x04
 #define WQ_FLAG_CUSTOM		0x08
+#define WQ_FLAG_DONE		0x10
 
 /*
  * A single wait-queue entry structure:
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 09e70ee2332ed..afad085960b81 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -2912,6 +2912,14 @@ static struct ctl_table vm_table[] = {
 		.proc_handler	= percpu_pagelist_fraction_sysctl_handler,
 		.extra1		= SYSCTL_ZERO,
 	},
+	{
+		.procname	= "page_lock_unfairness",
+		.data		= &sysctl_page_lock_unfairness,
+		.maxlen		= sizeof(sysctl_page_lock_unfairness),
+		.mode		= 0644,
+		.proc_handler	= proc_dointvec_minmax,
+		.extra1		= SYSCTL_ZERO,
+	},
 #ifdef CONFIG_MMU
 	{
 		.procname	= "max_map_count",
diff --git a/mm/filemap.c b/mm/filemap.c
index 1aaea26556cc7..6aa08e7714ce6 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -988,9 +988,43 @@ void __init pagecache_init(void)
 	page_writeback_init();
 }
 
+/*
+ * The page wait code treats the "wait->flags" somewhat unusually, because
+ * we have multiple different kinds of waits, not just he usual "exclusive"
+ * one.
+ *
+ * We have:
+ *
+ *  (a) no special bits set:
+ *
+ *	We're just waiting for the bit to be released, and when a waker
+ *	calls the wakeup function, we set WQ_FLAG_WOKEN and wake it up,
+ *	and remove it from the wait queue.
+ *
+ *	Simple and straightforward.
+ *
+ *  (b) WQ_FLAG_EXCLUSIVE:
+ *
+ *	The waiter is waiting to get the lock, and only one waiter should
+ *	be woken up to avoid any thundering herd behavior. We'll set the
+ *	WQ_FLAG_WOKEN bit, wake it up, and remove it from the wait queue.
+ *
+ *	This is the traditional exclusive wait.
+ *
+ *  (b) WQ_FLAG_EXCLUSIVE | WQ_FLAG_CUSTOM:
+ *
+ *	The waiter is waiting to get the bit, and additionally wants the
+ *	lock to be transferred to it for fair lock behavior. If the lock
+ *	cannot be taken, we stop walking the wait queue without waking
+ *	the waiter.
+ *
+ *	This is the "fair lock handoff" case, and in addition to setting
+ *	WQ_FLAG_WOKEN, we set WQ_FLAG_DONE to let the waiter easily see
+ *	that it now has the lock.
+ */
 static int wake_page_function(wait_queue_entry_t *wait, unsigned mode, int sync, void *arg)
 {
-	int ret;
+	unsigned int flags;
 	struct wait_page_key *key = arg;
 	struct wait_page_queue *wait_page
 		= container_of(wait, struct wait_page_queue, wait);
@@ -999,35 +1033,44 @@ static int wake_page_function(wait_queue_entry_t *wait, unsigned mode, int sync,
 		return 0;
 
 	/*
-	 * If it's an exclusive wait, we get the bit for it, and
-	 * stop walking if we can't.
-	 *
-	 * If it's a non-exclusive wait, then the fact that this
-	 * wake function was called means that the bit already
-	 * was cleared, and we don't care if somebody then
-	 * re-took it.
+	 * If it's a lock handoff wait, we get the bit for it, and
+	 * stop walking (and do not wake it up) if we can't.
 	 */
-	ret = 0;
-	if (wait->flags & WQ_FLAG_EXCLUSIVE) {
-		if (test_and_set_bit(key->bit_nr, &key->page->flags))
+	flags = wait->flags;
+	if (flags & WQ_FLAG_EXCLUSIVE) {
+		if (test_bit(key->bit_nr, &key->page->flags))
 			return -1;
-		ret = 1;
+		if (flags & WQ_FLAG_CUSTOM) {
+			if (test_and_set_bit(key->bit_nr, &key->page->flags))
+				return -1;
+			flags |= WQ_FLAG_DONE;
+		}
 	}
-	wait->flags |= WQ_FLAG_WOKEN;
 
+	/*
+	 * We are holding the wait-queue lock, but the waiter that
+	 * is waiting for this will be checking the flags without
+	 * any locking.
+	 *
+	 * So update the flags atomically, and wake up the waiter
+	 * afterwards to avoid any races. This store-release pairs
+	 * with the load-acquire in wait_on_page_bit_common().
+	 */
+	smp_store_release(&wait->flags, flags | WQ_FLAG_WOKEN);
 	wake_up_state(wait->private, mode);
 
 	/*
 	 * Ok, we have successfully done what we're waiting for,
 	 * and we can unconditionally remove the wait entry.
 	 *
-	 * Note that this has to be the absolute last thing we do,
-	 * since after list_del_init(&wait->entry) the wait entry
+	 * Note that this pairs with the "finish_wait()" in the
+	 * waiter, and has to be the absolute last thing we do.
+	 * After this list_del_init(&wait->entry) the wait entry
 	 * might be de-allocated and the process might even have
 	 * exited.
 	 */
 	list_del_init_careful(&wait->entry);
-	return ret;
+	return (flags & WQ_FLAG_EXCLUSIVE) != 0;
 }
 
 static void wake_up_page_bit(struct page *page, int bit_nr)
@@ -1107,8 +1150,8 @@ enum behavior {
 };
 
 /*
- * Attempt to check (or get) the page bit, and mark the
- * waiter woken if successful.
+ * Attempt to check (or get) the page bit, and mark us done
+ * if successful.
  */
 static inline bool trylock_page_bit_common(struct page *page, int bit_nr,
 					struct wait_queue_entry *wait)
@@ -1119,13 +1162,17 @@ static inline bool trylock_page_bit_common(struct page *page, int bit_nr,
 	} else if (test_bit(bit_nr, &page->flags))
 		return false;
 
-	wait->flags |= WQ_FLAG_WOKEN;
+	wait->flags |= WQ_FLAG_WOKEN | WQ_FLAG_DONE;
 	return true;
 }
 
+/* How many times do we accept lock stealing from under a waiter? */
+int sysctl_page_lock_unfairness = 5;
+
 static inline int wait_on_page_bit_common(wait_queue_head_t *q,
 	struct page *page, int bit_nr, int state, enum behavior behavior)
 {
+	int unfairness = sysctl_page_lock_unfairness;
 	struct wait_page_queue wait_page;
 	wait_queue_entry_t *wait = &wait_page.wait;
 	bool thrashing = false;
@@ -1143,11 +1190,18 @@ static inline int wait_on_page_bit_common(wait_queue_head_t *q,
 	}
 
 	init_wait(wait);
-	wait->flags = behavior == EXCLUSIVE ? WQ_FLAG_EXCLUSIVE : 0;
 	wait->func = wake_page_function;
 	wait_page.page = page;
 	wait_page.bit_nr = bit_nr;
 
+repeat:
+	wait->flags = 0;
+	if (behavior == EXCLUSIVE) {
+		wait->flags = WQ_FLAG_EXCLUSIVE;
+		if (--unfairness < 0)
+			wait->flags |= WQ_FLAG_CUSTOM;
+	}
+
 	/*
 	 * Do one last check whether we can get the
 	 * page bit synchronously.
@@ -1170,27 +1224,63 @@ static inline int wait_on_page_bit_common(wait_queue_head_t *q,
 
 	/*
 	 * From now on, all the logic will be based on
-	 * the WQ_FLAG_WOKEN flag, and the and the page
-	 * bit testing (and setting) will be - or has
-	 * already been - done by the wake function.
+	 * the WQ_FLAG_WOKEN and WQ_FLAG_DONE flag, to
+	 * see whether the page bit testing has already
+	 * been done by the wake function.
 	 *
 	 * We can drop our reference to the page.
 	 */
 	if (behavior == DROP)
 		put_page(page);
 
+	/*
+	 * Note that until the "finish_wait()", or until
+	 * we see the WQ_FLAG_WOKEN flag, we need to
+	 * be very careful with the 'wait->flags', because
+	 * we may race with a waker that sets them.
+	 */
 	for (;;) {
+		unsigned int flags;
+
 		set_current_state(state);
 
-		if (signal_pending_state(state, current))
+		/* Loop until we've been woken or interrupted */
+		flags = smp_load_acquire(&wait->flags);
+		if (!(flags & WQ_FLAG_WOKEN)) {
+			if (signal_pending_state(state, current))
+				break;
+
+			io_schedule();
+			continue;
+		}
+
+		/* If we were non-exclusive, we're done */
+		if (behavior != EXCLUSIVE)
 			break;
 
-		if (wait->flags & WQ_FLAG_WOKEN)
+		/* If the waker got the lock for us, we're done */
+		if (flags & WQ_FLAG_DONE)
 			break;
 
-		io_schedule();
+		/*
+		 * Otherwise, if we're getting the lock, we need to
+		 * try to get it ourselves.
+		 *
+		 * And if that fails, we'll have to retry this all.
+		 */
+		if (unlikely(test_and_set_bit(bit_nr, &page->flags)))
+			goto repeat;
+
+		wait->flags |= WQ_FLAG_DONE;
+		break;
 	}
 
+	/*
+	 * If a signal happened, this 'finish_wait()' may remove the last
+	 * waiter from the wait-queues, but the PageWaiters bit will remain
+	 * set. That's ok. The next wakeup will take care of it, and trying
+	 * to do it here would be difficult and prone to races.
+	 */
 	finish_wait(q, wait);
 
 	if (thrashing) {
@@ -1200,12 +1290,20 @@ static inline int wait_on_page_bit_common(wait_queue_head_t *q,
 	}
 
 	/*
-	 * A signal could leave PageWaiters set. Clearing it here if
-	 * !waitqueue_active would be possible (by open-coding finish_wait),
-	 * but still fail to catch it in the case of wait hash collision. We
-	 * already can fail to clear wait hash collision cases, so don't
-	 * bother with signals either.
+	 * NOTE! The wait->flags weren't stable until we've done the
+	 * 'finish_wait()', and we could have exited the loop above due
+	 * to a signal, and had a wakeup event happen after the signal
+	 * test but before the 'finish_wait()'.
+	 *
+	 * So only after the finish_wait() can we reliably determine
+	 * if we got woken up or not, so we can now figure out the final
+	 * return value based on that state without races.
+	 *
+	 * Also note that WQ_FLAG_WOKEN is sufficient for a non-exclusive
+	 * waiter, but an exclusive one requires WQ_FLAG_DONE.
 	 */
+	if (behavior == EXCLUSIVE)
+		return wait->flags & WQ_FLAG_DONE ? 0 : -EINTR;
 
 	return wait->flags & WQ_FLAG_WOKEN ? 0 : -EINTR;
 }
-- 
GitLab


From b3b33d3c43bbe0177d70653f4e889c78cc37f097 Mon Sep 17 00:00:00 2001
From: Sunghyun Jin <mcsmonk@gmail.com>
Date: Thu, 3 Sep 2020 21:41:16 +0900
Subject: [PATCH 1284/1341] percpu: fix first chunk size calculation for
 populated bitmap

Variable populated, which is a member of struct pcpu_chunk, is used as a
unit of size of unsigned long.
However, size of populated is miscounted. So, I fix this minor part.

Fixes: 8ab16c43ea79 ("percpu: change the number of pages marked in the first_chunk pop bitmap")
Cc: <stable@vger.kernel.org> # 4.14+
Signed-off-by: Sunghyun Jin <mcsmonk@gmail.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
---
 mm/percpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/percpu.c b/mm/percpu.c
index f4709629e6dee..1ed1a349eab83 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -1316,7 +1316,7 @@ static struct pcpu_chunk * __init pcpu_alloc_first_chunk(unsigned long tmp_addr,
 
 	/* allocate chunk */
 	alloc_size = sizeof(struct pcpu_chunk) +
-		BITS_TO_LONGS(region_size >> PAGE_SHIFT);
+		BITS_TO_LONGS(region_size >> PAGE_SHIFT) * sizeof(unsigned long);
 	chunk = memblock_alloc(alloc_size, SMP_CACHE_BYTES);
 	if (!chunk)
 		panic("%s: Failed to allocate %zu bytes\n", __func__,
-- 
GitLab


From 21653a4181ff292480599dad996a2b759ccf050f Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Wed, 9 Sep 2020 12:32:33 +0200
Subject: [PATCH 1285/1341] i2c: core: Call i2c_acpi_install_space_handler()
 before i2c_acpi_register_devices()

Some ACPI i2c-devices _STA method (which is used to detect if the device
is present) use autodetection code which probes which device is present
over i2c. This requires the I2C ACPI OpRegion handler to be registered
before we enumerate i2c-clients under the i2c-adapter.

This fixes the i2c touchpad on the Lenovo ThinkBook 14-IIL and
ThinkBook 15 IIL not getting an i2c-client instantiated and thus not
working.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1842039
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/i2c-core-base.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c
index 5ec082e2039d9..573b5da145d1e 100644
--- a/drivers/i2c/i2c-core-base.c
+++ b/drivers/i2c/i2c-core-base.c
@@ -1464,8 +1464,8 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
 
 	/* create pre-declared device nodes */
 	of_i2c_register_devices(adap);
-	i2c_acpi_register_devices(adap);
 	i2c_acpi_install_space_handler(adap);
+	i2c_acpi_register_devices(adap);
 
 	if (adap->nr < __i2c_first_dynamic_bus_num)
 		i2c_scan_static_board_info(adap);
-- 
GitLab


From 6f9885a36c006d798319661fa849f9c2922223b9 Mon Sep 17 00:00:00 2001
From: Josh Poimboeuf <jpoimboe@redhat.com>
Date: Mon, 14 Sep 2020 12:04:22 -0500
Subject: [PATCH 1286/1341] x86/unwind/fp: Fix FP unwinding in ret_from_fork

There have been some reports of "bad bp value" warnings printed by the
frame pointer unwinder:

  WARNING: kernel stack regs at 000000005bac7112 in sh:1014 has bad 'bp' value 0000000000000000

This warning happens when unwinding from an interrupt in
ret_from_fork(). If entry code gets interrupted, the state of the
frame pointer (rbp) may be undefined, which can confuse the unwinder,
resulting in warnings like the above.

There's an in_entry_code() check which normally silences such
warnings for entry code. But in this case, ret_from_fork() is getting
interrupted. It recently got moved out of .entry.text, so the
in_entry_code() check no longer works.

It could be moved back into .entry.text, but that would break the
noinstr validation because of the call to schedule_tail().

Instead, initialize each new task's RBP to point to the task's entry
regs via an encoded frame pointer.  That will allow the unwinder to
reach the end of the stack gracefully.

Fixes: b9f6976bfb94 ("x86/entry/64: Move non entry code into .text section")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reported-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/f366bbf5a8d02e2318ee312f738112d0af74d16f.1600103007.git.jpoimboe@redhat.com
---
 arch/x86/include/asm/frame.h | 19 +++++++++++++++++++
 arch/x86/kernel/process.c    |  3 ++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/frame.h b/arch/x86/include/asm/frame.h
index 296b346184b27..fb42659f6e988 100644
--- a/arch/x86/include/asm/frame.h
+++ b/arch/x86/include/asm/frame.h
@@ -60,12 +60,26 @@
 #define FRAME_END "pop %" _ASM_BP "\n"
 
 #ifdef CONFIG_X86_64
+
 #define ENCODE_FRAME_POINTER			\
 	"lea 1(%rsp), %rbp\n\t"
+
+static inline unsigned long encode_frame_pointer(struct pt_regs *regs)
+{
+	return (unsigned long)regs + 1;
+}
+
 #else /* !CONFIG_X86_64 */
+
 #define ENCODE_FRAME_POINTER			\
 	"movl %esp, %ebp\n\t"			\
 	"andl $0x7fffffff, %ebp\n\t"
+
+static inline unsigned long encode_frame_pointer(struct pt_regs *regs)
+{
+	return (unsigned long)regs & 0x7fffffff;
+}
+
 #endif /* CONFIG_X86_64 */
 
 #endif /* __ASSEMBLY__ */
@@ -83,6 +97,11 @@
 
 #define ENCODE_FRAME_POINTER
 
+static inline unsigned long encode_frame_pointer(struct pt_regs *regs)
+{
+	return 0;
+}
+
 #endif
 
 #define FRAME_BEGIN
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 13ce616cc7afb..ba4593a913fab 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -42,6 +42,7 @@
 #include <asm/spec-ctrl.h>
 #include <asm/io_bitmap.h>
 #include <asm/proto.h>
+#include <asm/frame.h>
 
 #include "process.h"
 
@@ -133,7 +134,7 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, unsigned long arg,
 	fork_frame = container_of(childregs, struct fork_frame, regs);
 	frame = &fork_frame->frame;
 
-	frame->bp = 0;
+	frame->bp = encode_frame_pointer(childregs);
 	frame->ret_addr = (unsigned long) ret_from_fork;
 	p->thread.sp = (unsigned long) fork_frame;
 	p->thread.io_bitmap = NULL;
-- 
GitLab


From 14c4acc5ed22c21f9821103be7c48efdf9763584 Mon Sep 17 00:00:00 2001
From: Joao Martins <joao.m.martins@oracle.com>
Date: Thu, 10 Sep 2020 18:16:21 +0100
Subject: [PATCH 1287/1341] iommu/amd: Fix potential @entry null deref

After commit 26e495f34107 ("iommu/amd: Restore IRTE.RemapEn bit after
programming IRTE"), smatch warns:

	drivers/iommu/amd/iommu.c:3870 amd_iommu_deactivate_guest_mode()
        warn: variable dereferenced before check 'entry' (see line 3867)

Fix this by moving the @valid assignment to after @entry has been checked
for NULL.

Fixes: 26e495f34107 ("iommu/amd: Restore IRTE.RemapEn bit after programming IRTE")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Cc: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20200910171621.12879-1-joao.m.martins@oracle.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/amd/iommu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 07ae8b93887e5..8abe1c7ad45be 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3864,12 +3864,14 @@ int amd_iommu_deactivate_guest_mode(void *data)
 	struct amd_ir_data *ir_data = (struct amd_ir_data *)data;
 	struct irte_ga *entry = (struct irte_ga *) ir_data->entry;
 	struct irq_cfg *cfg = ir_data->cfg;
-	u64 valid = entry->lo.fields_remap.valid;
+	u64 valid;
 
 	if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) ||
 	    !entry || !entry->lo.fields_vapic.guest_mode)
 		return 0;
 
+	valid = entry->lo.fields_remap.valid;
+
 	entry->lo.val = 0;
 	entry->hi.val = 0;
 
-- 
GitLab


From e97685abd5d711c885053d4949178f7ab9acbaef Mon Sep 17 00:00:00 2001
From: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Date: Wed, 16 Sep 2020 11:17:20 +0000
Subject: [PATCH 1288/1341] iommu/amd: Restore IRTE.RemapEn bit for
 amd_iommu_activate_guest_mode

Commit e52d58d54a32 ("iommu/amd: Use cmpxchg_double() when updating
128-bit IRTE") removed an assumption that modify_irte_ga always set
the valid bit, which requires the callers to set the appropriate value
for the struct irte_ga.valid bit before calling the function.

Similar to the commit 26e495f34107 ("iommu/amd: Restore IRTE.RemapEn
bit after programming IRTE"), which is for the function
amd_iommu_deactivate_guest_mode().

The same change is also needed for the amd_iommu_activate_guest_mode().
Otherwise, this could trigger IO_PAGE_FAULT for the VFIO based VMs with
AVIC enabled.

Fixes: e52d58d54a321 ("iommu/amd: Use cmpxchg_double() when updating 128-bit IRTE")
Reported-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Tested-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Cc: Joao Martins <joao.m.martins@oracle.com>
Link: https://lore.kernel.org/r/20200916111720.43913-1-suravee.suthikulpanit@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
 drivers/iommu/amd/iommu.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 8abe1c7ad45be..10e4200d35520 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -3840,14 +3840,18 @@ int amd_iommu_activate_guest_mode(void *data)
 {
 	struct amd_ir_data *ir_data = (struct amd_ir_data *)data;
 	struct irte_ga *entry = (struct irte_ga *) ir_data->entry;
+	u64 valid;
 
 	if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir) ||
 	    !entry || entry->lo.fields_vapic.guest_mode)
 		return 0;
 
+	valid = entry->lo.fields_vapic.valid;
+
 	entry->lo.val = 0;
 	entry->hi.val = 0;
 
+	entry->lo.fields_vapic.valid       = valid;
 	entry->lo.fields_vapic.guest_mode  = 1;
 	entry->lo.fields_vapic.ga_log_intr = 1;
 	entry->hi.fields.ga_root_ptr       = ir_data->ga_root_ptr;
-- 
GitLab


From a608b6a646e8816bc0db156baad2e0679fa4d137 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Wed, 9 Sep 2020 07:16:37 +0900
Subject: [PATCH 1289/1341] kconfig: qconf: use delete[] instead of delete to
 free array (again)

Commit c9b09a9249e6 ("kconfig: qconf: use delete[] instead of delete
to free array") fixed two lines, but there is one more.
(cppcheck does not report it for some reason...)

This was detected by Clang.

"make HOSTCXX=clang++ xconfig" reports the following:

scripts/kconfig/qconf.cc:1279:2: warning: 'delete' applied to a pointer that was allocated with 'new[]'; did you mean 'delete[]'? [-Wmismatched-new-delete]
        delete data;
        ^
              []
scripts/kconfig/qconf.cc:1239:15: note: allocated with 'new[]' here
        char *data = new char[count + 1];
                     ^

Fixes: c4f7398bee9c ("kconfig: qconf: make debug links work again")
Fixes: c9b09a9249e6 ("kconfig: qconf: use delete[] instead of delete to free array")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
---
 scripts/kconfig/qconf.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 8638785328a7f..c7216b9110fcd 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1276,7 +1276,7 @@ void ConfigInfoView::clicked(const QUrl &url)
 	}
 
 	free(result);
-	delete data;
+	delete[] data;
 }
 
 void ConfigInfoView::contextMenuEvent(QContextMenuEvent *event)
-- 
GitLab


From 2ce6324eadb014136a4baaf7a174f47d771364a0 Mon Sep 17 00:00:00 2001
From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Date: Tue, 15 Sep 2020 16:18:14 -0700
Subject: [PATCH 1290/1341] ACPI: DPTF: Add PCH FIVR participant driver

This driver adds support for Dynamic Platform and Thermal Framework
(DPTF) PCH (Platform Controller Hub) FIVR (Fully Integrated Voltage
Regulator) participant support.

This participant is responsible for exposing platform telemetry and
control for:
	freq_mhz_high_clock
	freq_mhz_low_clock

These attributes are used to get and set PCH FIVR switching frequency
for thermal and radio frequency interference mitigation.

Refer to Documentation/ABI/testing/sysfs-platform-dptf for ABI details.

ACPI methods description used in this driver:
RFC0: This ACPI method to set PCH FIVR switching frequency when FIVR
clock is 19.2MHz or 24MHz. The ACPI method takes a DWORD value.
GFC0: This ACPI method to get PCH FIVR switching frequency when FIVR
clock is 19.2MHz or 24MHz.
RFC1: This ACPI method to set PCH FIVR switching frequency when FIVR
clock is 38.4MHz. The ACPI method takes a DWORD value.
GFC1: This ACPI method to get PCH FIVR switching frequency when FIVR
clock is 38.4MHz.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 Documentation/ABI/testing/sysfs-platform-dptf |  16 +++
 drivers/acpi/dptf/Kconfig                     |  14 ++
 drivers/acpi/dptf/Makefile                    |   1 +
 drivers/acpi/dptf/dptf_pch_fivr.c             | 126 ++++++++++++++++++
 drivers/acpi/dptf/int340x_thermal.c           |   1 +
 5 files changed, 158 insertions(+)
 create mode 100644 drivers/acpi/dptf/dptf_pch_fivr.c

diff --git a/Documentation/ABI/testing/sysfs-platform-dptf b/Documentation/ABI/testing/sysfs-platform-dptf
index eeed81ca6949d..2cbc660d163b2 100644
--- a/Documentation/ABI/testing/sysfs-platform-dptf
+++ b/Documentation/ABI/testing/sysfs-platform-dptf
@@ -92,3 +92,19 @@ Contact:	linux-acpi@vger.kernel.org
 Description:
 		(RO) The battery discharge current capability obtained from battery fuel gauge in
 		milli Amps.
+
+What:		/sys/bus/platform/devices/INTC1045:00/pch_fivr_switch_frequency/freq_mhz_low_clock
+Date:		November, 2020
+KernelVersion:	v5.10
+Contact:	linux-acpi@vger.kernel.org
+Description:
+		(RW) The PCH FIVR (Fully Integrated Voltage Regulator) switching frequency in MHz,
+		when FIVR clock is 19.2MHz or 24MHz.
+
+What:		/sys/bus/platform/devices/INTC1045:00/pch_fivr_switch_frequency/freq_mhz_high_clock
+Date:		November, 2020
+KernelVersion:	v5.10
+Contact:	linux-acpi@vger.kernel.org
+Description:
+		(RW) The PCH FIVR (Fully Integrated Voltage Regulator) switching frequency in MHz,
+		when FIVR clock is 38.4MHz.
diff --git a/drivers/acpi/dptf/Kconfig b/drivers/acpi/dptf/Kconfig
index 90a2fd9792823..51f06f36cafa9 100644
--- a/drivers/acpi/dptf/Kconfig
+++ b/drivers/acpi/dptf/Kconfig
@@ -14,3 +14,17 @@ config DPTF_POWER
 
 	  To compile this driver as a module, choose M here:
 	  the module will be called dptf_power.
+
+config DPTF_PCH_FIVR
+	tristate "DPTF PCH FIVR Participant"
+	depends on X86
+	help
+	  This driver adds support for Dynamic Platform and Thermal Framework
+	  (DPTF) PCH FIVR Participant device support. This driver allows to
+	  switch PCH FIVR (Fully Integrated Voltage Regulator) frequency.
+	  This participant is responsible for exposing:
+		freq_mhz_low_clock
+		freq_mhz_high_clock
+
+	  To compile this driver as a module, choose M here:
+	  the module will be called dptf_pch_fivr.
diff --git a/drivers/acpi/dptf/Makefile b/drivers/acpi/dptf/Makefile
index 1a9b0a2b25bf2..297340682f660 100644
--- a/drivers/acpi/dptf/Makefile
+++ b/drivers/acpi/dptf/Makefile
@@ -1,3 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_ACPI)             += int340x_thermal.o
 obj-$(CONFIG_DPTF_POWER)	+= dptf_power.o
+obj-$(CONFIG_DPTF_PCH_FIVR)	+= dptf_pch_fivr.o
diff --git a/drivers/acpi/dptf/dptf_pch_fivr.c b/drivers/acpi/dptf/dptf_pch_fivr.c
new file mode 100644
index 0000000000000..4ab2888277475
--- /dev/null
+++ b/drivers/acpi/dptf/dptf_pch_fivr.c
@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * dptf_pch_fivr:  DPTF PCH FIVR Participant driver
+ * Copyright (c) 2020, Intel Corporation.
+ */
+
+#include <linux/acpi.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+/*
+ * Presentation of attributes which are defined for INT1045
+ * They are:
+ * freq_mhz_low_clock : Set PCH FIVR switching freq for
+ *			FIVR clock 19.2MHz and 24MHz
+ * freq_mhz_high_clock : Set PCH FIVR switching freq for
+ *			FIVR clock 38.4MHz
+ */
+#define PCH_FIVR_SHOW(name, method) \
+static ssize_t name##_show(struct device *dev,\
+			   struct device_attribute *attr,\
+			   char *buf)\
+{\
+	struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
+	unsigned long long val;\
+	acpi_status status;\
+\
+	status = acpi_evaluate_integer(acpi_dev->handle, #method,\
+				       NULL, &val);\
+	if (ACPI_SUCCESS(status))\
+		return sprintf(buf, "%d\n", (int)val);\
+	else\
+		return -EINVAL;\
+}
+
+#define PCH_FIVR_STORE(name, method) \
+static ssize_t name##_store(struct device *dev,\
+			    struct device_attribute *attr,\
+			    const char *buf, size_t count)\
+{\
+	struct acpi_device *acpi_dev = dev_get_drvdata(dev);\
+	acpi_status status;\
+	u32 val;\
+\
+	if (kstrtouint(buf, 0, &val) < 0)\
+		return -EINVAL;\
+\
+	status = acpi_execute_simple_method(acpi_dev->handle, #method, val);\
+	if (ACPI_SUCCESS(status))\
+		return count;\
+\
+	return -EINVAL;\
+}
+
+PCH_FIVR_SHOW(freq_mhz_low_clock, GFC0)
+PCH_FIVR_SHOW(freq_mhz_high_clock, GFC1)
+PCH_FIVR_STORE(freq_mhz_low_clock, RFC0)
+PCH_FIVR_STORE(freq_mhz_high_clock, RFC1)
+
+static DEVICE_ATTR_RW(freq_mhz_low_clock);
+static DEVICE_ATTR_RW(freq_mhz_high_clock);
+
+static struct attribute *fivr_attrs[] = {
+	&dev_attr_freq_mhz_low_clock.attr,
+	&dev_attr_freq_mhz_high_clock.attr,
+	NULL
+};
+
+static const struct attribute_group pch_fivr_attribute_group = {
+	.attrs = fivr_attrs,
+	.name = "pch_fivr_switch_frequency"
+};
+
+static int pch_fivr_add(struct platform_device *pdev)
+{
+	struct acpi_device *acpi_dev;
+	unsigned long long ptype;
+	acpi_status status;
+	int result;
+
+	acpi_dev = ACPI_COMPANION(&(pdev->dev));
+	if (!acpi_dev)
+		return -ENODEV;
+
+	status = acpi_evaluate_integer(acpi_dev->handle, "PTYP", NULL, &ptype);
+	if (ACPI_FAILURE(status) || ptype != 0x05)
+		return -ENODEV;
+
+	result = sysfs_create_group(&pdev->dev.kobj,
+				    &pch_fivr_attribute_group);
+	if (result)
+		return result;
+
+	platform_set_drvdata(pdev, acpi_dev);
+
+	return 0;
+}
+
+static int pch_fivr_remove(struct platform_device *pdev)
+{
+	sysfs_remove_group(&pdev->dev.kobj, &pch_fivr_attribute_group);
+
+	return 0;
+}
+
+static const struct acpi_device_id pch_fivr_device_ids[] = {
+	{"INTC1045", 0},
+	{"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, pch_fivr_device_ids);
+
+static struct platform_driver pch_fivr_driver = {
+	.probe = pch_fivr_add,
+	.remove = pch_fivr_remove,
+	.driver = {
+		.name = "DPTF PCH FIVR",
+		.acpi_match_table = pch_fivr_device_ids,
+	},
+};
+
+module_platform_driver(pch_fivr_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ACPI DPTF PCH FIVR driver");
diff --git a/drivers/acpi/dptf/int340x_thermal.c b/drivers/acpi/dptf/int340x_thermal.c
index bc71a6a603345..8d420c7e71781 100644
--- a/drivers/acpi/dptf/int340x_thermal.c
+++ b/drivers/acpi/dptf/int340x_thermal.c
@@ -27,6 +27,7 @@ static const struct acpi_device_id int340x_thermal_device_ids[] = {
 	{"INTC1040"},
 	{"INTC1043"},
 	{"INTC1044"},
+	{"INTC1045"},
 	{"INTC1047"},
 	{""},
 };
-- 
GitLab


From 0a10d3fe3e5c601031676e81b41fb2977650b4d4 Mon Sep 17 00:00:00 2001
From: Ionela Voinescu <ionela.voinescu@arm.com>
Date: Tue, 1 Sep 2020 21:55:45 +0100
Subject: [PATCH 1291/1341] arch_topology: validate input frequencies to
 arch_set_freq_scale()

The current frequency passed to arch_set_freq_scale() could end up
being 0, signaling an error in setting a new frequency. Also, if the
maximum frequency in 0, this will result in a division by 0 error.

Therefore, validate these input values before using them for the
setting of the frequency scale factor.

Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/base/arch_topology.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 75f72d6842941..42a08ef693aeb 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -33,6 +33,9 @@ void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
 	unsigned long scale;
 	int i;
 
+	if (WARN_ON_ONCE(!cur_freq || !max_freq))
+		return;
+
 	/*
 	 * If the use of counters for FIE is enabled, just return as we don't
 	 * want to update the scale factor with information from CPUFREQ.
-- 
GitLab


From 1a0419b0db4647107a9cf4a28b331c343c0378a0 Mon Sep 17 00:00:00 2001
From: Ionela Voinescu <ionela.voinescu@arm.com>
Date: Tue, 1 Sep 2020 21:55:46 +0100
Subject: [PATCH 1292/1341] cpufreq: move invariance setter calls in cpufreq
 core

To properly scale its per-entity load-tracking signals, the task scheduler
needs to be given a frequency scale factor, i.e. some image of the current
frequency the CPU is running at. Currently, this scale can be computed
either by using counters (APERF/MPERF on x86, AMU on arm64), or by
piggy-backing on the frequency selection done by cpufreq.

For the latter, drivers have to explicitly set the scale factor
themselves, despite it being purely boiler-plate code: the required
information depends entirely on the kind of frequency switch callback
implemented by the driver, i.e. either of: target_index(), target(),
fast_switch() and setpolicy().

The fitness of those callbacks with regard to driving the Frequency
Invariance Engine (FIE) is studied below:

target_index()
==============
Documentation states that the chosen frequency "must be determined by
freq_table[index].frequency". It isn't clear if it *has* to be that
frequency, or if it can use that frequency value to do some computation
that ultimately leads to a different frequency selection. All drivers
go for the former, while the vexpress-spc-cpufreq has an atypical
implementation which is handled separately.

Therefore, the hook works on the assumption the core can use
freq_table[index].frequency.

target()
=======
This has been flagged as deprecated since:

  commit 9c0ebcf78fde ("cpufreq: Implement light weight ->target_index() routine")

It also doesn't have that many users:

  gx-suspmod.c:439:       .target = cpufreq_gx_target,
  s3c24xx-cpufreq.c:428:  .target = s3c_cpufreq_target,
  intel_pstate.c:2528:    .target = intel_cpufreq_target,
  cppc_cpufreq.c:401:     .target = cppc_cpufreq_set_target,
  cpufreq-nforce2.c:371:  .target = nforce2_target,
  sh-cpufreq.c:163:       .target = sh_cpufreq_target,
  pcc-cpufreq.c:573:      .target = pcc_cpufreq_target,

Similarly to the path taken for target_index() calls in the cpufreq core
during a frequency change, all of the drivers above will mark the end of a
frequency change by a call to cpufreq_freq_transition_end().

Therefore, cpufreq_freq_transition_end() can be used as the location for
the arch_set_freq_scale() call to potentially inform the scheduler of the
frequency change.

This change maintains the previous functionality for the drivers that
implement the target_index() callback, while also adding support for the
few drivers that implement the deprecated target() callback.

fast_switch()
=============
This callback *has* to return the frequency that was selected.

setpolicy()
===========
This callback does not have any designated way of informing what was the
end choice. But there are only two drivers using setpolicy(), and none
of them have current FIE support:

  drivers/cpufreq/longrun.c:281:	.setpolicy	= longrun_set_policy,
  drivers/cpufreq/intel_pstate.c:2215:	.setpolicy	= intel_pstate_set_policy,

The intel_pstate is known to use counter-driven frequency invariance.

Conclusion
==========

Given that the significant majority of current FIE enabled drivers use
callbacks that lend themselves to triggering the setting of the FIE scale
factor in a generic way, move the invariance setter calls to cpufreq core.

As a result of setting the frequency scale factor in cpufreq core, after
callbacks that lend themselves to trigger it, remove this functionality
from the driver side.

To be noted that despite marking a successful frequency change, many
cpufreq drivers will consider the new frequency as the requested
frequency, although this is might not be the one granted by the hardware.

Therefore, the call to arch_set_freq_scale() is a "best effort" one, and
it is up to the architecture if the new frequency is used in the new
frequency scale factor setting (determined by the implementation of
arch_set_freq_scale()) or eventually used by the scheduler (determined
by the implementation of arch_scale_freq_capacity()). The architecture
is in a better position to decide if it has better methods to obtain
more accurate information regarding the current frequency and use that
information instead (for example, the use of counters).

Also, the implementation to arch_set_freq_scale() will now have to handle
error conditions (current frequency == 0) in order to prevent the
overhead in cpufreq core when the default arch_set_freq_scale()
implementation is used.

Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Suggested-by: Valentin Schneider <valentin.schneider@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpufreq/cpufreq-dt.c           | 10 +---------
 drivers/cpufreq/cpufreq.c              | 12 +++++++++++-
 drivers/cpufreq/qcom-cpufreq-hw.c      |  9 +--------
 drivers/cpufreq/scmi-cpufreq.c         | 12 ++----------
 drivers/cpufreq/scpi-cpufreq.c         |  6 +-----
 drivers/cpufreq/vexpress-spc-cpufreq.c | 12 ++----------
 6 files changed, 18 insertions(+), 43 deletions(-)

diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 944d7b45afe9a..9fd4ce774f129 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -40,16 +40,8 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
 {
 	struct private_data *priv = policy->driver_data;
 	unsigned long freq = policy->freq_table[index].frequency;
-	int ret;
-
-	ret = dev_pm_opp_set_rate(priv->cpu_dev, freq * 1000);
 
-	if (!ret) {
-		arch_set_freq_scale(policy->related_cpus, freq,
-				    policy->cpuinfo.max_freq);
-	}
-
-	return ret;
+	return dev_pm_opp_set_rate(priv->cpu_dev, freq * 1000);
 }
 
 /*
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 47aa90f9a7c2e..4d5fe777184a9 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -446,6 +446,10 @@ void cpufreq_freq_transition_end(struct cpufreq_policy *policy,
 
 	cpufreq_notify_post_transition(policy, freqs, transition_failed);
 
+	arch_set_freq_scale(policy->related_cpus,
+			    policy->cur,
+			    policy->cpuinfo.max_freq);
+
 	policy->transition_ongoing = false;
 	policy->transition_task = NULL;
 
@@ -2056,9 +2060,15 @@ EXPORT_SYMBOL(cpufreq_unregister_notifier);
 unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
 					unsigned int target_freq)
 {
+	unsigned int freq;
+
 	target_freq = clamp_val(target_freq, policy->min, policy->max);
+	freq = cpufreq_driver->fast_switch(policy, target_freq);
+
+	arch_set_freq_scale(policy->related_cpus, freq,
+			    policy->cpuinfo.max_freq);
 
-	return cpufreq_driver->fast_switch(policy, target_freq);
+	return freq;
 }
 EXPORT_SYMBOL_GPL(cpufreq_driver_fast_switch);
 
diff --git a/drivers/cpufreq/qcom-cpufreq-hw.c b/drivers/cpufreq/qcom-cpufreq-hw.c
index 3fb044b907a83..aabe4306d92f9 100644
--- a/drivers/cpufreq/qcom-cpufreq-hw.c
+++ b/drivers/cpufreq/qcom-cpufreq-hw.c
@@ -85,8 +85,6 @@ static int qcom_cpufreq_hw_target_index(struct cpufreq_policy *policy,
 	if (icc_scaling_enabled)
 		qcom_cpufreq_set_bw(policy, freq);
 
-	arch_set_freq_scale(policy->related_cpus, freq,
-			    policy->cpuinfo.max_freq);
 	return 0;
 }
 
@@ -113,16 +111,11 @@ static unsigned int qcom_cpufreq_hw_fast_switch(struct cpufreq_policy *policy,
 {
 	void __iomem *perf_state_reg = policy->driver_data;
 	unsigned int index;
-	unsigned long freq;
 
 	index = policy->cached_resolved_idx;
 	writel_relaxed(index, perf_state_reg);
 
-	freq = policy->freq_table[index].frequency;
-	arch_set_freq_scale(policy->related_cpus, freq,
-			    policy->cpuinfo.max_freq);
-
-	return freq;
+	return policy->freq_table[index].frequency;
 }
 
 static int qcom_cpufreq_hw_read_lut(struct device *cpu_dev,
diff --git a/drivers/cpufreq/scmi-cpufreq.c b/drivers/cpufreq/scmi-cpufreq.c
index fb42e33903776..6dd1311660b56 100644
--- a/drivers/cpufreq/scmi-cpufreq.c
+++ b/drivers/cpufreq/scmi-cpufreq.c
@@ -48,16 +48,11 @@ static unsigned int scmi_cpufreq_get_rate(unsigned int cpu)
 static int
 scmi_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int index)
 {
-	int ret;
 	struct scmi_data *priv = policy->driver_data;
 	struct scmi_perf_ops *perf_ops = handle->perf_ops;
 	u64 freq = policy->freq_table[index].frequency;
 
-	ret = perf_ops->freq_set(handle, priv->domain_id, freq * 1000, false);
-	if (!ret)
-		arch_set_freq_scale(policy->related_cpus, freq,
-				    policy->cpuinfo.max_freq);
-	return ret;
+	return perf_ops->freq_set(handle, priv->domain_id, freq * 1000, false);
 }
 
 static unsigned int scmi_cpufreq_fast_switch(struct cpufreq_policy *policy,
@@ -67,11 +62,8 @@ static unsigned int scmi_cpufreq_fast_switch(struct cpufreq_policy *policy,
 	struct scmi_perf_ops *perf_ops = handle->perf_ops;
 
 	if (!perf_ops->freq_set(handle, priv->domain_id,
-				target_freq * 1000, true)) {
-		arch_set_freq_scale(policy->related_cpus, target_freq,
-				    policy->cpuinfo.max_freq);
+				target_freq * 1000, true))
 		return target_freq;
-	}
 
 	return 0;
 }
diff --git a/drivers/cpufreq/scpi-cpufreq.c b/drivers/cpufreq/scpi-cpufreq.c
index b0f5388b88544..43db05b949d95 100644
--- a/drivers/cpufreq/scpi-cpufreq.c
+++ b/drivers/cpufreq/scpi-cpufreq.c
@@ -47,9 +47,8 @@ static unsigned int scpi_cpufreq_get_rate(unsigned int cpu)
 static int
 scpi_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int index)
 {
-	unsigned long freq = policy->freq_table[index].frequency;
+	u64 rate = policy->freq_table[index].frequency * 1000;
 	struct scpi_data *priv = policy->driver_data;
-	u64 rate = freq * 1000;
 	int ret;
 
 	ret = clk_set_rate(priv->clk, rate);
@@ -60,9 +59,6 @@ scpi_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int index)
 	if (clk_get_rate(priv->clk) != rate)
 		return -EIO;
 
-	arch_set_freq_scale(policy->related_cpus, freq,
-			    policy->cpuinfo.max_freq);
-
 	return 0;
 }
 
diff --git a/drivers/cpufreq/vexpress-spc-cpufreq.c b/drivers/cpufreq/vexpress-spc-cpufreq.c
index 4e8b1dee7c9aa..e89b905754d21 100644
--- a/drivers/cpufreq/vexpress-spc-cpufreq.c
+++ b/drivers/cpufreq/vexpress-spc-cpufreq.c
@@ -182,7 +182,6 @@ static int ve_spc_cpufreq_set_target(struct cpufreq_policy *policy,
 {
 	u32 cpu = policy->cpu, cur_cluster, new_cluster, actual_cluster;
 	unsigned int freqs_new;
-	int ret;
 
 	cur_cluster = cpu_to_cluster(cpu);
 	new_cluster = actual_cluster = per_cpu(physical_cluster, cpu);
@@ -197,15 +196,8 @@ static int ve_spc_cpufreq_set_target(struct cpufreq_policy *policy,
 			new_cluster = A15_CLUSTER;
 	}
 
-	ret = ve_spc_cpufreq_set_rate(cpu, actual_cluster, new_cluster,
-				      freqs_new);
-
-	if (!ret) {
-		arch_set_freq_scale(policy->related_cpus, freqs_new,
-				    policy->cpuinfo.max_freq);
-	}
-
-	return ret;
+	return ve_spc_cpufreq_set_rate(cpu, actual_cluster, new_cluster,
+				       freqs_new);
 }
 
 static inline u32 get_table_count(struct cpufreq_frequency_table *table)
-- 
GitLab


From 874f635310648a5adcedbd7e02ea0555cfa1da56 Mon Sep 17 00:00:00 2001
From: Ionela Voinescu <ionela.voinescu@arm.com>
Date: Tue, 1 Sep 2020 21:55:47 +0100
Subject: [PATCH 1293/1341] cpufreq: report whether cpufreq supports Frequency
 Invariance (FI)

Now that the update of the FI scale factor is done in cpufreq core for
selected functions - target(), target_index() and fast_switch(),
we can provide feedback to the task scheduler and architecture code
on whether cpufreq supports FI.

For this purpose provide an external function to expose whether the
cpufreq drivers support FI, by using a static key.

The logic behind the enablement of cpufreq-based invariance is as
follows:
 - cpufreq-based invariance is disabled by default
 - cpufreq-based invariance is enabled if any of the callbacks
   above is implemented while the unsupported setpolicy() is not

The cpufreq_supports_freq_invariance() function only returns whether
cpufreq is instrumented with the arch_set_freq_scale() calls that
result in support for frequency invariance. Due to the lack of knowledge
on whether the implementation of arch_set_freq_scale() actually results
in the setting of a scale factor based on cpufreq information, it is up
to the architecture code to ensure the setting and provision of the
scale factor to the scheduler.

Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpufreq/cpufreq.c | 16 ++++++++++++++++
 include/linux/cpufreq.h   |  5 +++++
 2 files changed, 21 insertions(+)

diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 4d5fe777184a9..570bf2ebe9d4b 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -61,6 +61,12 @@ static struct cpufreq_driver *cpufreq_driver;
 static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
 static DEFINE_RWLOCK(cpufreq_driver_lock);
 
+static DEFINE_STATIC_KEY_FALSE(cpufreq_freq_invariance);
+bool cpufreq_supports_freq_invariance(void)
+{
+	return static_branch_likely(&cpufreq_freq_invariance);
+}
+
 /* Flag to suspend/resume CPUFreq governors */
 static bool cpufreq_suspended;
 
@@ -2720,6 +2726,15 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
 	cpufreq_driver = driver_data;
 	write_unlock_irqrestore(&cpufreq_driver_lock, flags);
 
+	/*
+	 * Mark support for the scheduler's frequency invariance engine for
+	 * drivers that implement target(), target_index() or fast_switch().
+	 */
+	if (!cpufreq_driver->setpolicy) {
+		static_branch_enable_cpuslocked(&cpufreq_freq_invariance);
+		pr_debug("supports frequency invariance");
+	}
+
 	if (driver_data->setpolicy)
 		driver_data->flags |= CPUFREQ_CONST_LOOPS;
 
@@ -2789,6 +2804,7 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver)
 	cpus_read_lock();
 	subsys_interface_unregister(&cpufreq_interface);
 	remove_boost_sysfs_file();
+	static_branch_disable_cpuslocked(&cpufreq_freq_invariance);
 	cpuhp_remove_state_nocalls_cpuslocked(hp_online);
 
 	write_lock_irqsave(&cpufreq_driver_lock, flags);
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index a911e5d068454..e54767e2a68a6 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -217,6 +217,7 @@ void refresh_frequency_limits(struct cpufreq_policy *policy);
 void cpufreq_update_policy(unsigned int cpu);
 void cpufreq_update_limits(unsigned int cpu);
 bool have_governor_per_policy(void);
+bool cpufreq_supports_freq_invariance(void);
 struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
 void cpufreq_enable_fast_switch(struct cpufreq_policy *policy);
 void cpufreq_disable_fast_switch(struct cpufreq_policy *policy);
@@ -237,6 +238,10 @@ static inline unsigned int cpufreq_get_hw_max_freq(unsigned int cpu)
 {
 	return 0;
 }
+static inline bool cpufreq_supports_freq_invariance(void)
+{
+	return false;
+}
 static inline void disable_cpufreq(void) { }
 #endif
 
-- 
GitLab


From ecddc3a0d5d752071c627aa1a1d4d7b529ddae67 Mon Sep 17 00:00:00 2001
From: Valentin Schneider <valentin.schneider@arm.com>
Date: Tue, 1 Sep 2020 21:55:48 +0100
Subject: [PATCH 1294/1341] arch_topology, cpufreq: constify arch_* cpumasks

The passed cpumask arguments to arch_set_freq_scale() and
arch_freq_counters_available() are only iterated over, so reflect this
in the prototype. This also allows to pass system cpumasks like
cpu_online_mask without getting a warning.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 arch/arm64/kernel/topology.c  | 2 +-
 drivers/base/arch_topology.c  | 4 ++--
 drivers/cpufreq/cpufreq.c     | 5 +++--
 include/linux/arch_topology.h | 2 +-
 include/linux/cpufreq.h       | 3 ++-
 5 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
index 0801a0f3c156a..9a9f2b8dedf5b 100644
--- a/arch/arm64/kernel/topology.c
+++ b/arch/arm64/kernel/topology.c
@@ -253,7 +253,7 @@ static int __init init_amu_fie(void)
 }
 late_initcall_sync(init_amu_fie);
 
-bool arch_freq_counters_available(struct cpumask *cpus)
+bool arch_freq_counters_available(const struct cpumask *cpus)
 {
 	return amu_freq_invariant() &&
 	       cpumask_subset(cpus, amu_fie_cpus);
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 42a08ef693aeb..91de5331ac8a5 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -21,13 +21,13 @@
 #include <linux/sched.h>
 #include <linux/smp.h>
 
-__weak bool arch_freq_counters_available(struct cpumask *cpus)
+__weak bool arch_freq_counters_available(const struct cpumask *cpus)
 {
 	return false;
 }
 DEFINE_PER_CPU(unsigned long, freq_scale) = SCHED_CAPACITY_SCALE;
 
-void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
+void arch_set_freq_scale(const struct cpumask *cpus, unsigned long cur_freq,
 			 unsigned long max_freq)
 {
 	unsigned long scale;
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 570bf2ebe9d4b..2ea245a6c0c07 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -160,8 +160,9 @@ u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)
 }
 EXPORT_SYMBOL_GPL(get_cpu_idle_time);
 
-__weak void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
-		unsigned long max_freq)
+__weak void arch_set_freq_scale(const struct cpumask *cpus,
+				unsigned long cur_freq,
+				unsigned long max_freq)
 {
 }
 EXPORT_SYMBOL_GPL(arch_set_freq_scale);
diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h
index 69b1dabe39dc3..810c833362577 100644
--- a/include/linux/arch_topology.h
+++ b/include/linux/arch_topology.h
@@ -30,7 +30,7 @@ static inline unsigned long topology_get_freq_scale(int cpu)
 	return per_cpu(freq_scale, cpu);
 }
 
-bool arch_freq_counters_available(struct cpumask *cpus);
+bool arch_freq_counters_available(const struct cpumask *cpus);
 
 DECLARE_PER_CPU(unsigned long, thermal_pressure);
 
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index e54767e2a68a6..9f779fbdbe7bb 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -1011,7 +1011,8 @@ static inline void sched_cpufreq_governor_change(struct cpufreq_policy *policy,
 extern void arch_freq_prepare_all(void);
 extern unsigned int arch_freq_get_on_cpu(int cpu);
 
-extern void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
+extern void arch_set_freq_scale(const struct cpumask *cpus,
+				unsigned long cur_freq,
 				unsigned long max_freq);
 
 /* the following are really really optional */
-- 
GitLab


From 15e5d5b45b2b7072214af519357a1c0af078c50b Mon Sep 17 00:00:00 2001
From: Valentin Schneider <valentin.schneider@arm.com>
Date: Tue, 1 Sep 2020 21:55:49 +0100
Subject: [PATCH 1295/1341] arch_topology, arm, arm64: define
 arch_scale_freq_invariant()

arch_scale_freq_invariant() is used by schedutil to determine whether
the scheduler's load-tracking signals are frequency invariant. Its
definition is overridable, though by default it is hardcoded to 'true'
if arch_scale_freq_capacity() is defined ('false' otherwise).

This behaviour is not overridden on arm, arm64 and other users of the
generic arch topology driver, which is somewhat precarious:
arch_scale_freq_capacity() will always be defined, yet not all cpufreq
drivers are guaranteed to drive the frequency invariance scale factor
setting. In other words, the load-tracking signals may very well *not*
be frequency invariant.

Now that cpufreq can be queried on whether the current driver is driving
the Frequency Invariance (FI) scale setting, the current situation can
be improved. This combines the query of whether cpufreq supports the
setting of the frequency scale factor, with whether all online CPUs are
counter-based FI enabled.

While cpufreq FI enablement applies at system level, for all CPUs,
counter-based FI support could also be used for only a subset of CPUs to
set the invariance scale factor. Therefore, if cpufreq-based FI support
is present, we consider the system to be invariant. If missing, we
require all online CPUs to be counter-based FI enabled in order for the
full system to be considered invariant.

If the system ends up not being invariant, a new condition is needed in
the counter initialization code that disables all scale factor setting
based on counters.

Precedence of counters over cpufreq use is not important here. The
invariant status is only given to the system if all CPUs have at least
one method of setting the frequency scale factor.

Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Ionela Voinescu <ionela.voinescu@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 arch/arm/include/asm/topology.h   | 1 +
 arch/arm64/include/asm/topology.h | 1 +
 arch/arm64/kernel/topology.c      | 7 +++++++
 drivers/base/arch_topology.c      | 6 ++++++
 include/linux/arch_topology.h     | 2 ++
 5 files changed, 17 insertions(+)

diff --git a/arch/arm/include/asm/topology.h b/arch/arm/include/asm/topology.h
index e0593cf095d05..9219e67befbe5 100644
--- a/arch/arm/include/asm/topology.h
+++ b/arch/arm/include/asm/topology.h
@@ -9,6 +9,7 @@
 
 /* Replace task scheduler's default frequency-invariant accounting */
 #define arch_scale_freq_capacity topology_get_freq_scale
+#define arch_scale_freq_invariant topology_scale_freq_invariant
 
 /* Replace task scheduler's default cpu-invariant accounting */
 #define arch_scale_cpu_capacity topology_get_cpu_scale
diff --git a/arch/arm64/include/asm/topology.h b/arch/arm64/include/asm/topology.h
index e042f6527981e..7cb519473fbd8 100644
--- a/arch/arm64/include/asm/topology.h
+++ b/arch/arm64/include/asm/topology.h
@@ -27,6 +27,7 @@ void topology_scale_freq_tick(void);
 
 /* Replace task scheduler's default frequency-invariant accounting */
 #define arch_scale_freq_capacity topology_get_freq_scale
+#define arch_scale_freq_invariant topology_scale_freq_invariant
 
 /* Replace task scheduler's default cpu-invariant accounting */
 #define arch_scale_cpu_capacity topology_get_cpu_scale
diff --git a/arch/arm64/kernel/topology.c b/arch/arm64/kernel/topology.c
index 9a9f2b8dedf5b..4064d39bb66d8 100644
--- a/arch/arm64/kernel/topology.c
+++ b/arch/arm64/kernel/topology.c
@@ -246,6 +246,13 @@ static int __init init_amu_fie(void)
 		static_branch_enable(&amu_fie_key);
 	}
 
+	/*
+	 * If the system is not fully invariant after AMU init, disable
+	 * partial use of counters for frequency invariance.
+	 */
+	if (!topology_scale_freq_invariant())
+		static_branch_disable(&amu_fie_key);
+
 free_valid_mask:
 	free_cpumask_var(valid_cpus);
 
diff --git a/drivers/base/arch_topology.c b/drivers/base/arch_topology.c
index 91de5331ac8a5..89cae168b076b 100644
--- a/drivers/base/arch_topology.c
+++ b/drivers/base/arch_topology.c
@@ -21,6 +21,12 @@
 #include <linux/sched.h>
 #include <linux/smp.h>
 
+bool topology_scale_freq_invariant(void)
+{
+	return cpufreq_supports_freq_invariance() ||
+	       arch_freq_counters_available(cpu_online_mask);
+}
+
 __weak bool arch_freq_counters_available(const struct cpumask *cpus)
 {
 	return false;
diff --git a/include/linux/arch_topology.h b/include/linux/arch_topology.h
index 810c833362577..083df331a3c9f 100644
--- a/include/linux/arch_topology.h
+++ b/include/linux/arch_topology.h
@@ -30,6 +30,8 @@ static inline unsigned long topology_get_freq_scale(int cpu)
 	return per_cpu(freq_scale, cpu);
 }
 
+bool topology_scale_freq_invariant(void);
+
 bool arch_freq_counters_available(const struct cpumask *cpus);
 
 DECLARE_PER_CPU(unsigned long, thermal_pressure);
-- 
GitLab


From db6c6a0df840e3f52c84cc302cc1a08ba11a4416 Mon Sep 17 00:00:00 2001
From: Josh Poimboeuf <jpoimboe@redhat.com>
Date: Thu, 10 Sep 2020 10:24:57 -0500
Subject: [PATCH 1296/1341] objtool: Fix noreturn detection for ignored
 functions

When a function is annotated with STACK_FRAME_NON_STANDARD, objtool
doesn't validate its code paths.  It also skips sibling call detection
within the function.

But sibling call detection is actually needed for the case where the
ignored function doesn't have any return instructions.  Otherwise
objtool naively marks the function as implicit static noreturn, which
affects the reachability of its callers, resulting in "unreachable
instruction" warnings.

Fix it by just enabling sibling call detection for ignored functions.
The 'insn->ignore' check in add_jump_destinations() is no longer needed
after

  e6da9567959e ("objtool: Don't use ignore flag for fake jumps").

Fixes the following warning:

  arch/x86/kvm/vmx/vmx.o: warning: objtool: vmx_handle_exit_irqoff()+0x142: unreachable instruction

which triggers on an allmodconfig with CONFIG_GCOV_KERNEL unset.

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lkml.kernel.org/r/5b1e2536cdbaa5246b60d7791b76130a74082c62.1599751464.git.jpoimboe@redhat.com
---
 tools/objtool/check.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index e034a8f24f466..90a66891441ab 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -619,7 +619,7 @@ static int add_jump_destinations(struct objtool_file *file)
 		if (!is_static_jump(insn))
 			continue;
 
-		if (insn->ignore || insn->offset == FAKE_JUMP_OFFSET)
+		if (insn->offset == FAKE_JUMP_OFFSET)
 			continue;
 
 		reloc = find_reloc_by_dest_range(file->elf, insn->sec,
-- 
GitLab


From ff6f3aff46beb3c29e0802cffcc559e1756c4814 Mon Sep 17 00:00:00 2001
From: Qii Wang <qii.wang@mediatek.com>
Date: Thu, 17 Sep 2020 19:55:41 +0800
Subject: [PATCH 1297/1341] i2c: mediatek: Fix generic definitions for bus
 frequency

The max frequency of mediatek i2c controller driver is
I2C_MAX_HIGH_SPEED_MODE_FREQ, not I2C_MAX_FAST_MODE_PLUS_FREQ.
Fix it.

Fixes: 90224e6468e1 ("i2c: drivers: Use generic definitions for bus frequencies")
Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Qii Wang <qii.wang@mediatek.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/busses/i2c-mt65xx.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index efc14041d45b3..a1978ebd8177f 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -681,8 +681,8 @@ static int mtk_i2c_calculate_speed(struct mtk_i2c *i2c, unsigned int clk_src,
 	unsigned int cnt_mul;
 	int ret = -EINVAL;
 
-	if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
-		target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
+	if (target_speed > I2C_MAX_HIGH_SPEED_MODE_FREQ)
+		target_speed = I2C_MAX_HIGH_SPEED_MODE_FREQ;
 
 	max_step_cnt = mtk_i2c_max_step_cnt(target_speed);
 	base_step_cnt = max_step_cnt;
-- 
GitLab


From b44658e755b5a733e9df04449facbc738df09170 Mon Sep 17 00:00:00 2001
From: Qii Wang <qii.wang@mediatek.com>
Date: Thu, 17 Sep 2020 19:55:42 +0800
Subject: [PATCH 1298/1341] i2c: mediatek: Send i2c master code at more than
 1MHz

The master code needs to being sent when the speed is more than
I2C_MAX_FAST_MODE_PLUS_FREQ, not I2C_MAX_FAST_MODE_FREQ in the
latest I2C-bus specification and user manual.

Signed-off-by: Qii Wang <qii.wang@mediatek.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/busses/i2c-mt65xx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index a1978ebd8177f..0cbdfbe605b55 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -759,7 +759,7 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
 	for (clk_div = 1; clk_div <= max_clk_div; clk_div++) {
 		clk_src = parent_clk / clk_div;
 
-		if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
+		if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ) {
 			/* Set master code speed register */
 			ret = mtk_i2c_calculate_speed(i2c, clk_src,
 						      I2C_MAX_FAST_MODE_FREQ,
-- 
GitLab


From 6eb158ec0a45dbfd98bc6971c461b7d4d5bf61b3 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Date: Fri, 11 Sep 2020 17:01:39 +0200
Subject: [PATCH 1299/1341] i2c: mxs: use MXS_DMA_CTRL_WAIT4END instead of
 DMA_CTRL_ACK

The driver-specific usage of the DMA_CTRL_ACK flag was replaced with a
custom flag in commit ceeeb99cd821 ("dmaengine: mxs: rename custom flag"),
but i2c-mxs was not updated to use the new flag, completely breaking I2C
transactions using DMA.

Fixes: ceeeb99cd821 ("dmaengine: mxs: rename custom flag")
Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
---
 drivers/i2c/busses/i2c-mxs.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/busses/i2c-mxs.c b/drivers/i2c/busses/i2c-mxs.c
index 9587347447f0f..c4b08a9244614 100644
--- a/drivers/i2c/busses/i2c-mxs.c
+++ b/drivers/i2c/busses/i2c-mxs.c
@@ -25,6 +25,7 @@
 #include <linux/of_device.h>
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
+#include <linux/dma/mxs-dma.h>
 
 #define DRIVER_NAME "mxs-i2c"
 
@@ -200,7 +201,8 @@ static int mxs_i2c_dma_setup_xfer(struct i2c_adapter *adap,
 		dma_map_sg(i2c->dev, &i2c->sg_io[0], 1, DMA_TO_DEVICE);
 		desc = dmaengine_prep_slave_sg(i2c->dmach, &i2c->sg_io[0], 1,
 					DMA_MEM_TO_DEV,
-					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+					DMA_PREP_INTERRUPT |
+					MXS_DMA_CTRL_WAIT4END);
 		if (!desc) {
 			dev_err(i2c->dev,
 				"Failed to get DMA data write descriptor.\n");
@@ -228,7 +230,8 @@ static int mxs_i2c_dma_setup_xfer(struct i2c_adapter *adap,
 		dma_map_sg(i2c->dev, &i2c->sg_io[1], 1, DMA_FROM_DEVICE);
 		desc = dmaengine_prep_slave_sg(i2c->dmach, &i2c->sg_io[1], 1,
 					DMA_DEV_TO_MEM,
-					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+					DMA_PREP_INTERRUPT |
+					MXS_DMA_CTRL_WAIT4END);
 		if (!desc) {
 			dev_err(i2c->dev,
 				"Failed to get DMA data write descriptor.\n");
@@ -260,7 +263,8 @@ static int mxs_i2c_dma_setup_xfer(struct i2c_adapter *adap,
 		dma_map_sg(i2c->dev, i2c->sg_io, 2, DMA_TO_DEVICE);
 		desc = dmaengine_prep_slave_sg(i2c->dmach, i2c->sg_io, 2,
 					DMA_MEM_TO_DEV,
-					DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
+					DMA_PREP_INTERRUPT |
+					MXS_DMA_CTRL_WAIT4END);
 		if (!desc) {
 			dev_err(i2c->dev,
 				"Failed to get DMA data write descriptor.\n");
-- 
GitLab


From b5bfe7dca3e00a7c7de900b2d671c06cd66d7dee Mon Sep 17 00:00:00 2001
From: Kees Cook <keescook@chromium.org>
Date: Fri, 18 Sep 2020 21:20:00 -0700
Subject: [PATCH 1300/1341] mailmap: add older email addresses for Kees Cook

This adds explicit mailmap entries for my older/other email addresses.

Reported-by: Joe Perches <joe@perches.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Link: https://lkml.kernel.org/r/20200910193939.3798377-1-keescook@chromium.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 .mailmap | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.mailmap b/.mailmap
index 50096b96c85df..a780211468e4e 100644
--- a/.mailmap
+++ b/.mailmap
@@ -169,6 +169,10 @@ Juha Yrjola <juha.yrjola@solidboot.com>
 Julien Thierry <julien.thierry.kdev@gmail.com> <julien.thierry@arm.com>
 Kamil Konieczny <k.konieczny@samsung.com> <k.konieczny@partner.samsung.com>
 Kay Sievers <kay.sievers@vrfy.org>
+Kees Cook <keescook@chromium.org> <kees.cook@canonical.com>
+Kees Cook <keescook@chromium.org> <keescook@google.com>
+Kees Cook <keescook@chromium.org> <kees@outflux.net>
+Kees Cook <keescook@chromium.org> <kees@ubuntu.com>
 Kenneth W Chen <kenneth.w.chen@intel.com>
 Konstantin Khlebnikov <koct9i@gmail.com> <khlebnikov@yandex-team.ru>
 Konstantin Khlebnikov <koct9i@gmail.com> <k.khlebnikov@samsung.com>
-- 
GitLab


From 62fdb1632bcbed30c40f6bd2b58297617e442658 Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hughd@google.com>
Date: Fri, 18 Sep 2020 21:20:03 -0700
Subject: [PATCH 1301/1341] ksm: reinstate memcg charge on copied pages

Patch series "mm: fixes to past from future testing".

Here's a set of independent fixes against 5.9-rc2: prompted by
testing Alex Shi's "warning on !memcg" and lru_lock series, but
I think fit for 5.9 - though maybe only the first for stable.

This patch (of 5):

In 5.8 some instances of memcg charging in do_swap_page() and unuse_pte()
were removed, on the understanding that swap cache is now already charged
at those points; but a case was missed, when ksm_might_need_to_copy() has
decided it must allocate a substitute page: such pages were never charged.
Fix it inside ksm_might_need_to_copy().

This was discovered by Alex Shi's prospective commit "mm/memcg: warning on
!memcg after readahead page charged".

But there is a another surprise: this also fixes some rarer uncharged
PageAnon cases, when KSM is configured in, but has never been activated.
ksm_might_need_to_copy()'s anon_vma->root and linear_page_index() check
sometimes catches a case which would need to have been copied if KSM were
turned on.  Or that's my optimistic interpretation (of my own old code),
but it leaves some doubt as to whether everything is working as intended
there - might it hint at rare anon ptes which rmap cannot find?  A
question not easily answered: put in the fix for missed memcg charges.

Cc; Matthew Wilcox <willy@infradead.org>

Fixes: 4c6355b25e8b ("mm: memcontrol: charge swapin pages on instantiation")
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Qian Cai <cai@lca.pw>
Cc: <stable@vger.kernel.org>	[5.8]
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008301343270.5954@eggly.anvils
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008301358020.5954@eggly.anvils
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/ksm.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/mm/ksm.c b/mm/ksm.c
index 235f55d015410..9afccc36dbd20 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -2586,6 +2586,10 @@ struct page *ksm_might_need_to_copy(struct page *page,
 		return page;		/* let do_swap_page report the error */
 
 	new_page = alloc_page_vma(GFP_HIGHUSER_MOVABLE, vma, address);
+	if (new_page && mem_cgroup_charge(new_page, vma->vm_mm, GFP_KERNEL)) {
+		put_page(new_page);
+		new_page = NULL;
+	}
 	if (new_page) {
 		copy_user_highpage(new_page, page, address, vma);
 
-- 
GitLab


From a333e3e73b6648d3bd3ef6b971a59a6363bfcfc5 Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hughd@google.com>
Date: Fri, 18 Sep 2020 21:20:06 -0700
Subject: [PATCH 1302/1341] mm: migration of hugetlbfs page skip memcg

hugetlbfs pages do not participate in memcg: so although they do find most
of migrate_page_states() useful, it would be better if they did not call
into mem_cgroup_migrate() - where Qian Cai reported that LTP's
move_pages12 triggers the warning in Alex Shi's prospective commit
"mm/memcg: warning on !memcg after readahead page charged".

Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Johannes Weiner <hannes@cmpxch.org>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Qian Cai <cai@lca.pw>
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008301359460.5954@eggly.anvils
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/migrate.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index 941b89383cf3d..aecb1433cf3cc 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -668,7 +668,8 @@ void migrate_page_states(struct page *newpage, struct page *page)
 
 	copy_page_owner(page, newpage);
 
-	mem_cgroup_migrate(page, newpage);
+	if (!PageHuge(page))
+		mem_cgroup_migrate(page, newpage);
 }
 EXPORT_SYMBOL(migrate_page_states);
 
-- 
GitLab


From 8d8869ca5d2d9d86db96271ab063fdcfa9baf5b4 Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hughd@google.com>
Date: Fri, 18 Sep 2020 21:20:12 -0700
Subject: [PATCH 1303/1341] mm: fix check_move_unevictable_pages() on THP

check_move_unevictable_pages() is used in making unevictable shmem pages
evictable: by shmem_unlock_mapping(), drm_gem_check_release_pagevec() and
i915/gem check_release_pagevec().  Those may pass down subpages of a huge
page, when /sys/kernel/mm/transparent_hugepage/shmem_enabled is "force".

That does not crash or warn at present, but the accounting of vmstats
unevictable_pgs_scanned and unevictable_pgs_rescued is inconsistent:
scanned being incremented on each subpage, rescued only on the head (since
tails already appear evictable once the head has been updated).

5.8 commit 5d91f31faf8e ("mm: swap: fix vmstats for huge page") has
established that vm_events in general (and unevictable_pgs_rescued in
particular) should count every subpage: so follow that precedent here.

Do this in such a way that if mem_cgroup_page_lruvec() is made stricter
(to check page->mem_cgroup is always set), no problem: skip the tails
before calling it, and add thp_nr_pages() to vmstats on the head.

Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Yang Shi <shy828301@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Qian Cai <cai@lca.pw>
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008301405000.5954@eggly.anvils
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/vmscan.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 9727dd8e2581b..466fc3144fffc 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -4268,8 +4268,14 @@ void check_move_unevictable_pages(struct pagevec *pvec)
 	for (i = 0; i < pvec->nr; i++) {
 		struct page *page = pvec->pages[i];
 		struct pglist_data *pagepgdat = page_pgdat(page);
+		int nr_pages;
+
+		if (PageTransTail(page))
+			continue;
+
+		nr_pages = thp_nr_pages(page);
+		pgscanned += nr_pages;
 
-		pgscanned++;
 		if (pagepgdat != pgdat) {
 			if (pgdat)
 				spin_unlock_irq(&pgdat->lru_lock);
@@ -4288,7 +4294,7 @@ void check_move_unevictable_pages(struct pagevec *pvec)
 			ClearPageUnevictable(page);
 			del_page_from_lru_list(page, lruvec, LRU_UNEVICTABLE);
 			add_page_to_lru_list(page, lruvec, lru);
-			pgrescued++;
+			pgrescued += nr_pages;
 		}
 	}
 
-- 
GitLab


From 0964730bf46b4e271c5ecad5badbbd95737c087b Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hughd@google.com>
Date: Fri, 18 Sep 2020 21:20:15 -0700
Subject: [PATCH 1304/1341] mlock: fix unevictable_pgs event counts on THP

5.8 commit 5d91f31faf8e ("mm: swap: fix vmstats for huge page") has
established that vm_events should count every subpage of a THP, including
unevictable_pgs_culled and unevictable_pgs_rescued; but
lru_cache_add_inactive_or_unevictable() was not doing so for
unevictable_pgs_mlocked, and mm/mlock.c was not doing so for
unevictable_pgs mlocked, munlocked, cleared and stranded.

Fix them; but THPs don't go the pagevec way in mlock.c, so no fixes needed
on that path.

Fixes: 5d91f31faf8e ("mm: swap: fix vmstats for huge page")
Signed-off-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Yang Shi <shy828301@gmail.com>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Qian Cai <cai@lca.pw>
Link: http://lkml.kernel.org/r/alpine.LSU.2.11.2008301408230.5954@eggly.anvils
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/mlock.c | 24 +++++++++++++++---------
 mm/swap.c  |  6 +++---
 2 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/mm/mlock.c b/mm/mlock.c
index 93ca2bf30b4fd..884b1216da6a6 100644
--- a/mm/mlock.c
+++ b/mm/mlock.c
@@ -58,11 +58,14 @@ EXPORT_SYMBOL(can_do_mlock);
  */
 void clear_page_mlock(struct page *page)
 {
+	int nr_pages;
+
 	if (!TestClearPageMlocked(page))
 		return;
 
-	mod_zone_page_state(page_zone(page), NR_MLOCK, -thp_nr_pages(page));
-	count_vm_event(UNEVICTABLE_PGCLEARED);
+	nr_pages = thp_nr_pages(page);
+	mod_zone_page_state(page_zone(page), NR_MLOCK, -nr_pages);
+	count_vm_events(UNEVICTABLE_PGCLEARED, nr_pages);
 	/*
 	 * The previous TestClearPageMlocked() corresponds to the smp_mb()
 	 * in __pagevec_lru_add_fn().
@@ -76,7 +79,7 @@ void clear_page_mlock(struct page *page)
 		 * We lost the race. the page already moved to evictable list.
 		 */
 		if (PageUnevictable(page))
-			count_vm_event(UNEVICTABLE_PGSTRANDED);
+			count_vm_events(UNEVICTABLE_PGSTRANDED, nr_pages);
 	}
 }
 
@@ -93,9 +96,10 @@ void mlock_vma_page(struct page *page)
 	VM_BUG_ON_PAGE(PageCompound(page) && PageDoubleMap(page), page);
 
 	if (!TestSetPageMlocked(page)) {
-		mod_zone_page_state(page_zone(page), NR_MLOCK,
-				    thp_nr_pages(page));
-		count_vm_event(UNEVICTABLE_PGMLOCKED);
+		int nr_pages = thp_nr_pages(page);
+
+		mod_zone_page_state(page_zone(page), NR_MLOCK, nr_pages);
+		count_vm_events(UNEVICTABLE_PGMLOCKED, nr_pages);
 		if (!isolate_lru_page(page))
 			putback_lru_page(page);
 	}
@@ -138,7 +142,7 @@ static void __munlock_isolated_page(struct page *page)
 
 	/* Did try_to_unlock() succeed or punt? */
 	if (!PageMlocked(page))
-		count_vm_event(UNEVICTABLE_PGMUNLOCKED);
+		count_vm_events(UNEVICTABLE_PGMUNLOCKED, thp_nr_pages(page));
 
 	putback_lru_page(page);
 }
@@ -154,10 +158,12 @@ static void __munlock_isolated_page(struct page *page)
  */
 static void __munlock_isolation_failed(struct page *page)
 {
+	int nr_pages = thp_nr_pages(page);
+
 	if (PageUnevictable(page))
-		__count_vm_event(UNEVICTABLE_PGSTRANDED);
+		__count_vm_events(UNEVICTABLE_PGSTRANDED, nr_pages);
 	else
-		__count_vm_event(UNEVICTABLE_PGMUNLOCKED);
+		__count_vm_events(UNEVICTABLE_PGMUNLOCKED, nr_pages);
 }
 
 /**
diff --git a/mm/swap.c b/mm/swap.c
index d16d65d9b4e09..e7bdf094f76a0 100644
--- a/mm/swap.c
+++ b/mm/swap.c
@@ -494,14 +494,14 @@ void lru_cache_add_inactive_or_unevictable(struct page *page,
 
 	unevictable = (vma->vm_flags & (VM_LOCKED | VM_SPECIAL)) == VM_LOCKED;
 	if (unlikely(unevictable) && !TestSetPageMlocked(page)) {
+		int nr_pages = thp_nr_pages(page);
 		/*
 		 * We use the irq-unsafe __mod_zone_page_stat because this
 		 * counter is not modified from interrupt context, and the pte
 		 * lock is held(spinlock), which implies preemption disabled.
 		 */
-		__mod_zone_page_state(page_zone(page), NR_MLOCK,
-				    thp_nr_pages(page));
-		count_vm_event(UNEVICTABLE_PGMLOCKED);
+		__mod_zone_page_state(page_zone(page), NR_MLOCK, nr_pages);
+		count_vm_events(UNEVICTABLE_PGMLOCKED, nr_pages);
 	}
 	lru_cache_add(page);
 }
-- 
GitLab


From bb3e96d63eb75a2f4ff790b089f6b93614c729a1 Mon Sep 17 00:00:00 2001
From: Byron Stanoszek <gandalf@winds.org>
Date: Fri, 18 Sep 2020 21:20:18 -0700
Subject: [PATCH 1305/1341] tmpfs: restore functionality of nr_inodes=0

Commit e809d5f0b5c9 ("tmpfs: per-superblock i_ino support") made changes
to shmem_reserve_inode() in mm/shmem.c, however the original test for
(sbinfo->max_inodes) got dropped.  This causes mounting tmpfs with option
nr_inodes=0 to fail:

  # mount -ttmpfs -onr_inodes=0 none /ext0
  mount: /ext0: mount(2) system call failed: Cannot allocate memory.

This patch restores the nr_inodes=0 functionality.

Fixes: e809d5f0b5c9 ("tmpfs: per-superblock i_ino support")
Signed-off-by: Byron Stanoszek <gandalf@winds.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: Chris Down <chris@chrisdown.name>
Link: https://lkml.kernel.org/r/20200902035715.16414-1-gandalf@winds.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/shmem.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/mm/shmem.c b/mm/shmem.c
index 271548ca20f31..8e2b35ba93ad1 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -279,11 +279,13 @@ static int shmem_reserve_inode(struct super_block *sb, ino_t *inop)
 
 	if (!(sb->s_flags & SB_KERNMOUNT)) {
 		spin_lock(&sbinfo->stat_lock);
-		if (!sbinfo->free_inodes) {
-			spin_unlock(&sbinfo->stat_lock);
-			return -ENOSPC;
+		if (sbinfo->max_inodes) {
+			if (!sbinfo->free_inodes) {
+				spin_unlock(&sbinfo->stat_lock);
+				return -ENOSPC;
+			}
+			sbinfo->free_inodes--;
 		}
-		sbinfo->free_inodes--;
 		if (inop) {
 			ino = sbinfo->next_ino++;
 			if (unlikely(is_zero_ino(ino)))
-- 
GitLab


From b0399092ccebd9feef68d4ceb8d6219a8c0caa05 Mon Sep 17 00:00:00 2001
From: Muchun Song <songmuchun@bytedance.com>
Date: Fri, 18 Sep 2020 21:20:21 -0700
Subject: [PATCH 1306/1341] kprobes: fix kill kprobe which has been marked as
 gone

If a kprobe is marked as gone, we should not kill it again.  Otherwise, we
can disarm the kprobe more than once.  In that case, the statistics of
kprobe_ftrace_enabled can unbalance which can lead to that kprobe do not
work.

Fixes: e8386a0cb22f ("kprobes: support probing module __exit function")
Co-developed-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: "Naveen N . Rao" <naveen.n.rao@linux.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Song Liu <songliubraving@fb.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200822030055.32383-1-songmuchun@bytedance.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 kernel/kprobes.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 287b263c9cb95..049da84e19525 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -2140,6 +2140,9 @@ static void kill_kprobe(struct kprobe *p)
 
 	lockdep_assert_held(&kprobe_mutex);
 
+	if (WARN_ON_ONCE(kprobe_gone(p)))
+		return;
+
 	p->flags |= KPROBE_FLAG_GONE;
 	if (kprobe_aggrprobe(p)) {
 		/*
@@ -2419,7 +2422,10 @@ static int kprobes_module_callback(struct notifier_block *nb,
 	mutex_lock(&kprobe_mutex);
 	for (i = 0; i < KPROBE_TABLE_SIZE; i++) {
 		head = &kprobe_table[i];
-		hlist_for_each_entry(p, head, hlist)
+		hlist_for_each_entry(p, head, hlist) {
+			if (kprobe_gone(p))
+				continue;
+
 			if (within_module_init((unsigned long)p->addr, mod) ||
 			    (checkcore &&
 			     within_module_core((unsigned long)p->addr, mod))) {
@@ -2436,6 +2442,7 @@ static int kprobes_module_callback(struct notifier_block *nb,
 				 */
 				kill_kprobe(p);
 			}
+		}
 	}
 	if (val == MODULE_STATE_GOING)
 		remove_module_kprobe_blacklist(mod);
-- 
GitLab


From ec0abae6dcdf7ef88607c869bf35a4b63ce1b370 Mon Sep 17 00:00:00 2001
From: Ralph Campbell <rcampbell@nvidia.com>
Date: Fri, 18 Sep 2020 21:20:24 -0700
Subject: [PATCH 1307/1341] mm/thp: fix __split_huge_pmd_locked() for migration
 PMD

A migrating transparent huge page has to already be unmapped.  Otherwise,
the page could be modified while it is being copied to a new page and data
could be lost.  The function __split_huge_pmd() checks for a PMD migration
entry before calling __split_huge_pmd_locked() leading one to think that
__split_huge_pmd_locked() can handle splitting a migrating PMD.

However, the code always increments the page->_mapcount and adjusts the
memory control group accounting assuming the page is mapped.

Also, if the PMD entry is a migration PMD entry, the call to
is_huge_zero_pmd(*pmd) is incorrect because it calls pmd_pfn(pmd) instead
of migration_entry_to_pfn(pmd_to_swp_entry(pmd)).  Fix these problems by
checking for a PMD migration entry.

Fixes: 84c3fc4e9c56 ("mm: thp: check pmd migration entry in common path")
Signed-off-by: Ralph Campbell <rcampbell@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Yang Shi <shy828301@gmail.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Alistair Popple <apopple@nvidia.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Bharata B Rao <bharata@linux.ibm.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: <stable@vger.kernel.org>	[4.14+]
Link: https://lkml.kernel.org/r/20200903183140.19055-1-rcampbell@nvidia.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/huge_memory.c | 42 +++++++++++++++++++++++-------------------
 1 file changed, 23 insertions(+), 19 deletions(-)

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 7ff29cc3d55cb..faadc449cca59 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -2022,7 +2022,7 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
 		put_page(page);
 		add_mm_counter(mm, mm_counter_file(page), -HPAGE_PMD_NR);
 		return;
-	} else if (is_huge_zero_pmd(*pmd)) {
+	} else if (pmd_trans_huge(*pmd) && is_huge_zero_pmd(*pmd)) {
 		/*
 		 * FIXME: Do we want to invalidate secondary mmu by calling
 		 * mmu_notifier_invalidate_range() see comments below inside
@@ -2116,30 +2116,34 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
 		pte = pte_offset_map(&_pmd, addr);
 		BUG_ON(!pte_none(*pte));
 		set_pte_at(mm, addr, pte, entry);
-		atomic_inc(&page[i]._mapcount);
-		pte_unmap(pte);
-	}
-
-	/*
-	 * Set PG_double_map before dropping compound_mapcount to avoid
-	 * false-negative page_mapped().
-	 */
-	if (compound_mapcount(page) > 1 && !TestSetPageDoubleMap(page)) {
-		for (i = 0; i < HPAGE_PMD_NR; i++)
+		if (!pmd_migration)
 			atomic_inc(&page[i]._mapcount);
+		pte_unmap(pte);
 	}
 
-	lock_page_memcg(page);
-	if (atomic_add_negative(-1, compound_mapcount_ptr(page))) {
-		/* Last compound_mapcount is gone. */
-		__dec_lruvec_page_state(page, NR_ANON_THPS);
-		if (TestClearPageDoubleMap(page)) {
-			/* No need in mapcount reference anymore */
+	if (!pmd_migration) {
+		/*
+		 * Set PG_double_map before dropping compound_mapcount to avoid
+		 * false-negative page_mapped().
+		 */
+		if (compound_mapcount(page) > 1 &&
+		    !TestSetPageDoubleMap(page)) {
 			for (i = 0; i < HPAGE_PMD_NR; i++)
-				atomic_dec(&page[i]._mapcount);
+				atomic_inc(&page[i]._mapcount);
+		}
+
+		lock_page_memcg(page);
+		if (atomic_add_negative(-1, compound_mapcount_ptr(page))) {
+			/* Last compound_mapcount is gone. */
+			__dec_lruvec_page_state(page, NR_ANON_THPS);
+			if (TestClearPageDoubleMap(page)) {
+				/* No need in mapcount reference anymore */
+				for (i = 0; i < HPAGE_PMD_NR; i++)
+					atomic_dec(&page[i]._mapcount);
+			}
 		}
+		unlock_page_memcg(page);
 	}
-	unlock_page_memcg(page);
 
 	smp_wmb(); /* make pte visible before pmd */
 	pmd_populate(mm, pmd, pgtable);
-- 
GitLab


From 1ec882fc81e3177faf055877310dbdb0c68eb7db Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@csgroup.eu>
Date: Fri, 18 Sep 2020 21:20:28 -0700
Subject: [PATCH 1308/1341] selftests/vm: fix display of page size in
 map_hugetlb

The displayed size is in bytes while the text says it is in kB.

Shift it by 10 to really display kBytes.

Fixes: fa7b9a805c79 ("tools/selftest/vm: allow choosing mem size and page size in map_hugetlb")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/e27481224564a93d14106e750de31189deaa8bc8.1598861977.git.christophe.leroy@csgroup.eu
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 tools/testing/selftests/vm/map_hugetlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/vm/map_hugetlb.c b/tools/testing/selftests/vm/map_hugetlb.c
index 6af951900aa39..312889edb84ab 100644
--- a/tools/testing/selftests/vm/map_hugetlb.c
+++ b/tools/testing/selftests/vm/map_hugetlb.c
@@ -83,7 +83,7 @@ int main(int argc, char **argv)
 	}
 
 	if (shift)
-		printf("%u kB hugepages\n", 1 << shift);
+		printf("%u kB hugepages\n", 1 << (shift - 10));
 	else
 		printf("Default size hugepages\n");
 	printf("Mapping %lu Mbytes\n", (unsigned long)length >> 20);
-- 
GitLab


From 9683182612214aa5f5e709fad49444b847cd866a Mon Sep 17 00:00:00 2001
From: Pavel Tatashin <pasha.tatashin@soleen.com>
Date: Fri, 18 Sep 2020 21:20:31 -0700
Subject: [PATCH 1309/1341] mm/memory_hotplug: drain per-cpu pages again during
 memory offline

There is a race during page offline that can lead to infinite loop:
a page never ends up on a buddy list and __offline_pages() keeps
retrying infinitely or until a termination signal is received.

Thread#1 - a new process:

load_elf_binary
 begin_new_exec
  exec_mmap
   mmput
    exit_mmap
     tlb_finish_mmu
      tlb_flush_mmu
       release_pages
        free_unref_page_list
         free_unref_page_prepare
          set_pcppage_migratetype(page, migratetype);
             // Set page->index migration type below  MIGRATE_PCPTYPES

Thread#2 - hot-removes memory
__offline_pages
  start_isolate_page_range
    set_migratetype_isolate
      set_pageblock_migratetype(page, MIGRATE_ISOLATE);
        Set migration type to MIGRATE_ISOLATE-> set
        drain_all_pages(zone);
             // drain per-cpu page lists to buddy allocator.

Thread#1 - continue
         free_unref_page_commit
           migratetype = get_pcppage_migratetype(page);
              // get old migration type
           list_add(&page->lru, &pcp->lists[migratetype]);
              // add new page to already drained pcp list

Thread#2
Never drains pcp again, and therefore gets stuck in the loop.

The fix is to try to drain per-cpu lists again after
check_pages_isolated_cb() fails.

Fixes: c52e75935f8d ("mm: remove extra drain pages on pcp list")
Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: <stable@vger.kernel.org>
Link: https://lkml.kernel.org/r/20200903140032.380431-1-pasha.tatashin@soleen.com
Link: https://lkml.kernel.org/r/20200904151448.100489-2-pasha.tatashin@soleen.com
Link: http://lkml.kernel.org/r/20200904070235.GA15277@dhcp22.suse.cz
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/memory_hotplug.c | 14 ++++++++++++++
 mm/page_isolation.c |  8 ++++++++
 2 files changed, 22 insertions(+)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index e9d5ab5d3ca09..b11a269e23561 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -1575,6 +1575,20 @@ static int __ref __offline_pages(unsigned long start_pfn,
 		/* check again */
 		ret = walk_system_ram_range(start_pfn, end_pfn - start_pfn,
 					    NULL, check_pages_isolated_cb);
+		/*
+		 * per-cpu pages are drained in start_isolate_page_range, but if
+		 * there are still pages that are not free, make sure that we
+		 * drain again, because when we isolated range we might
+		 * have raced with another thread that was adding pages to pcp
+		 * list.
+		 *
+		 * Forward progress should be still guaranteed because
+		 * pages on the pcp list can only belong to MOVABLE_ZONE
+		 * because has_unmovable_pages explicitly checks for
+		 * PageBuddy on freed pages on other zones.
+		 */
+		if (ret)
+			drain_all_pages(zone);
 	} while (ret);
 
 	/* Ok, all of our target is isolated.
diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 242c03121d731..63a3db10a8c0c 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -170,6 +170,14 @@ __first_valid_page(unsigned long pfn, unsigned long nr_pages)
  * pageblocks we may have modified and return -EBUSY to caller. This
  * prevents two threads from simultaneously working on overlapping ranges.
  *
+ * Please note that there is no strong synchronization with the page allocator
+ * either. Pages might be freed while their page blocks are marked ISOLATED.
+ * In some cases pages might still end up on pcp lists and that would allow
+ * for their allocation even when they are in fact isolated already. Depending
+ * on how strong of a guarantee the caller needs drain_all_pages might be needed
+ * (e.g. __offline_pages will need to call it after check for isolated range for
+ * a next retry).
+ *
  * Return: the number of isolated pageblocks on success and -EBUSY if any part
  * of range cannot be isolated.
  */
-- 
GitLab


From 7bb82ac30c3dd4ecf1485685cbe84d2ba10dddf4 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 18 Sep 2020 21:20:34 -0700
Subject: [PATCH 1310/1341] ftrace: let ftrace_enable_sysctl take a kernel
 pointer buffer

Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ctl_table.proc_handler to take a kernel pointer.  Adjust the
signature of ftrace_enable_sysctl to match ctl_table.proc_handler which
fixes the following sparse warning:

kernel/trace/ftrace.c:7544:43: warning: incorrect type in argument 3 (different address spaces)
kernel/trace/ftrace.c:7544:43:    expected void *
kernel/trace/ftrace.c:7544:43:    got void [noderef] __user *buffer

Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/20200907093207.13540-1-tklauser@distanz.ch
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/ftrace.h | 3 +--
 kernel/trace/ftrace.c  | 3 +--
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index ce2c06f72e863..e5c2d5cc6e6ad 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -85,8 +85,7 @@ static inline int ftrace_mod_get_kallsym(unsigned int symnum, unsigned long *val
 extern int ftrace_enabled;
 extern int
 ftrace_enable_sysctl(struct ctl_table *table, int write,
-		     void __user *buffer, size_t *lenp,
-		     loff_t *ppos);
+		     void *buffer, size_t *lenp, loff_t *ppos);
 
 struct ftrace_ops;
 
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 275441254bb57..e9fa580f3083a 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -7531,8 +7531,7 @@ static bool is_permanent_ops_registered(void)
 
 int
 ftrace_enable_sysctl(struct ctl_table *table, int write,
-		     void __user *buffer, size_t *lenp,
-		     loff_t *ppos)
+		     void *buffer, size_t *lenp, loff_t *ppos)
 {
 	int ret = -ENODEV;
 
-- 
GitLab


From 4773ef33fc6e59bad2e5d19e334de2fa79c27b74 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 18 Sep 2020 21:20:37 -0700
Subject: [PATCH 1311/1341] stackleak: let stack_erasing_sysctl take a kernel
 pointer buffer

Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ctl_table.proc_handler to take a kernel pointer.  Adjust the
signature of stack_erasing_sysctl to match ctl_table.proc_handler which
fixes the following sparse warning:

kernel/stackleak.c:31:50: warning: incorrect type in argument 3 (different address spaces)
kernel/stackleak.c:31:50:    expected void *
kernel/stackleak.c:31:50:    got void [noderef] __user *buffer

Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/20200907093253.13656-1-tklauser@distanz.ch
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/stackleak.h | 2 +-
 kernel/stackleak.c        | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/stackleak.h b/include/linux/stackleak.h
index 3d5c3271a9a8c..a59db2f08e76b 100644
--- a/include/linux/stackleak.h
+++ b/include/linux/stackleak.h
@@ -25,7 +25,7 @@ static inline void stackleak_task_init(struct task_struct *t)
 
 #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE
 int stack_erasing_sysctl(struct ctl_table *table, int write,
-			void __user *buffer, size_t *lenp, loff_t *ppos);
+			void *buffer, size_t *lenp, loff_t *ppos);
 #endif
 
 #else /* !CONFIG_GCC_PLUGIN_STACKLEAK */
diff --git a/kernel/stackleak.c b/kernel/stackleak.c
index a8fc9ae1d03d9..ce161a8e8d975 100644
--- a/kernel/stackleak.c
+++ b/kernel/stackleak.c
@@ -20,7 +20,7 @@
 static DEFINE_STATIC_KEY_FALSE(stack_erasing_bypass);
 
 int stack_erasing_sysctl(struct ctl_table *table, int write,
-			void __user *buffer, size_t *lenp, loff_t *ppos)
+			void *buffer, size_t *lenp, loff_t *ppos)
 {
 	int ret = 0;
 	int state = !static_branch_unlikely(&stack_erasing_bypass);
-- 
GitLab


From 9ca48e20ec5cb3427ca57ffac9ed2b87090ab488 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Fri, 18 Sep 2020 21:20:39 -0700
Subject: [PATCH 1312/1341] fs/fs-writeback.c: adjust
 dirtytime_interval_handler definition to match prototype

Commit 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
changed ctl_table.proc_handler to take a kernel pointer.  Adjust the
definition of dirtytime_interval_handler to match its prototype in
linux/writeback.h which fixes the following sparse error/warning:

fs/fs-writeback.c:2189:50: warning: incorrect type in argument 3 (different address spaces)
fs/fs-writeback.c:2189:50:    expected void *
fs/fs-writeback.c:2189:50:    got void [noderef] __user *buffer
fs/fs-writeback.c:2184:5: error: symbol 'dirtytime_interval_handler' redeclared with different type (incompatible argument 3 (different address spaces)):
fs/fs-writeback.c:2184:5:    int extern [addressable] [signed] [toplevel] dirtytime_interval_handler( ... )
fs/fs-writeback.c: note: in included file:
./include/linux/writeback.h:374:5: note: previously declared as:
./include/linux/writeback.h:374:5:    int extern [addressable] [signed] [toplevel] dirtytime_interval_handler( ... )

Fixes: 32927393dc1c ("sysctl: pass kernel pointers to ->proc_handler")
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Link: https://lkml.kernel.org/r/20200907093140.13434-1-tklauser@distanz.ch
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 fs/fs-writeback.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 149227160ff0b..58b27e4070a30 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -2184,7 +2184,7 @@ static int __init start_dirtytime_writeback(void)
 __initcall(start_dirtytime_writeback);
 
 int dirtytime_interval_handler(struct ctl_table *table, int write,
-			       void __user *buffer, size_t *lenp, loff_t *ppos)
+			       void *buffer, size_t *lenp, loff_t *ppos)
 {
 	int ret;
 
-- 
GitLab


From 2645d432051cd4e6c04ee8af23be07c92f1f52a2 Mon Sep 17 00:00:00 2001
From: Changbin Du <changbin.du@gmail.com>
Date: Fri, 18 Sep 2020 21:20:42 -0700
Subject: [PATCH 1313/1341] kcsan: kconfig: move to menu 'Generic Kernel
 Debugging Instruments'

This moves the KCSAN kconfig items under menu 'Generic Kernel Debugging
Instruments' where UBSAN resides.

Signed-off-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Marco Elver <elver@google.com>
Link: https://lkml.kernel.org/r/20200904152224.5570-1-changbin.du@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 lib/Kconfig.debug | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index e068c3c7189a1..0c781f912f9f0 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -520,8 +520,8 @@ config DEBUG_FS_ALLOW_NONE
 endchoice
 
 source "lib/Kconfig.kgdb"
-
 source "lib/Kconfig.ubsan"
+source "lib/Kconfig.kcsan"
 
 endmenu
 
@@ -1620,8 +1620,6 @@ config PROVIDE_OHCI1394_DMA_INIT
 
 source "samples/Kconfig"
 
-source "lib/Kconfig.kcsan"
-
 config ARCH_HAS_DEVMEM_IS_ALLOWED
 	bool
 
-- 
GitLab


From 21190b74bcf3a36ebab9a715088c29f59877e1f3 Mon Sep 17 00:00:00 2001
From: Greentime Hu <greentime.hu@sifive.com>
Date: Tue, 4 Aug 2020 11:02:05 +0800
Subject: [PATCH 1314/1341] riscv: Add sfence.vma after early page table
 changes

This invalidates local TLB after modifying the page tables during early init as
it's too early to handle suprious faults as we otherwise do.

Fixes: f2c17aabc917 ("RISC-V: Implement compile-time fixed mappings")
Reported-by: Syven Wang <syven.wang@sifive.com>
Signed-off-by: Syven Wang <syven.wang@sifive.com>
Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
[Palmer: Cleaned up the commit text]
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/mm/init.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 787c75f751a55..ca03762a37338 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -226,12 +226,11 @@ void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t prot)
 
 	ptep = &fixmap_pte[pte_index(addr)];
 
-	if (pgprot_val(prot)) {
+	if (pgprot_val(prot))
 		set_pte(ptep, pfn_pte(phys >> PAGE_SHIFT, prot));
-	} else {
+	else
 		pte_clear(&init_mm, addr, ptep);
-		local_flush_tlb_page(addr);
-	}
+	local_flush_tlb_page(addr);
 }
 
 static pte_t *__init get_pte_virt(phys_addr_t pa)
-- 
GitLab


From f025d9d9934b84cd03b7796072d10686029c408e Mon Sep 17 00:00:00 2001
From: Damien Le Moal <damien.lemoal@wdc.com>
Date: Wed, 16 Sep 2020 16:59:41 +0900
Subject: [PATCH 1315/1341] riscv: Fix Kendryte K210 device tree

The Kendryte K210 SoC CLINT is compatible with Sifive clint v0
(sifive,clint0). Fix the Kendryte K210 device tree clint entry to be
inline with the sifive timer definition documented in
Documentation/devicetree/bindings/timer/sifive,clint.yaml.
The device tree clint entry is renamed similarly to u-boot device tree
definition to improve compatibility with u-boot defined device tree.
To ensure correct initialization, the interrup-cells attribute is added
and the interrupt-extended attribute definition fixed.

This fixes boot failures with Kendryte K210 SoC boards.

Note that the clock referenced is kept as K210_CLK_ACLK, which does not
necessarilly match the clint MTIME increment rate. This however does not
seem to cause any problem for now.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/boot/dts/kendryte/k210.dtsi | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/boot/dts/kendryte/k210.dtsi b/arch/riscv/boot/dts/kendryte/k210.dtsi
index c1df56ccb8d55..d2d0ff6456325 100644
--- a/arch/riscv/boot/dts/kendryte/k210.dtsi
+++ b/arch/riscv/boot/dts/kendryte/k210.dtsi
@@ -95,10 +95,12 @@ sysctl: sysctl@50440000 {
 			#clock-cells = <1>;
 		};
 
-		clint0: interrupt-controller@2000000 {
+		clint0: clint@2000000 {
+			#interrupt-cells = <1>;
 			compatible = "riscv,clint0";
 			reg = <0x2000000 0xC000>;
-			interrupts-extended = <&cpu0_intc 3>,  <&cpu1_intc 3>;
+			interrupts-extended =  <&cpu0_intc 3 &cpu0_intc 7
+						&cpu1_intc 3 &cpu1_intc 7>;
 			clocks = <&sysctl K210_CLK_ACLK>;
 		};
 
-- 
GitLab


From d5be89a8d118a8e8d09cd74a921a808f17fbdd09 Mon Sep 17 00:00:00 2001
From: Palmer Dabbelt <palmerdabbelt@google.com>
Date: Mon, 14 Sep 2020 09:56:30 -0700
Subject: [PATCH 1316/1341] RISC-V: Resurrect the MMIO timer implementation for
 M-mode systems

The K210 doesn't implement rdtime in M-mode, and since that's where Linux runs
in the NOMMU systems that means we can't use rdtime.  The K210 is the only
system that anyone is currently running NOMMU or M-mode on, so here we're just
inlining the timer read directly.

This also adds the CLINT driver as an !MMU dependency, as it's currently the
only timer driver availiable for these systems and without it we get a build
failure for some configurations.

Tested-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
---
 arch/riscv/Kconfig                |  1 +
 arch/riscv/include/asm/clint.h    | 26 ++++++++++++++++++++++++++
 arch/riscv/include/asm/timex.h    | 27 +++++++++++++++++++++++++++
 drivers/clocksource/timer-clint.c | 17 +++++++++++++++++
 4 files changed, 71 insertions(+)
 create mode 100644 arch/riscv/include/asm/clint.h

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index df18372861d8d..7766e1289468b 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -32,6 +32,7 @@ config RISCV
 	select ARCH_WANT_FRAME_POINTERS
 	select ARCH_WANT_HUGE_PMD_SHARE if 64BIT
 	select CLONE_BACKWARDS
+	select CLINT_TIMER if !MMU
 	select COMMON_CLK
 	select EDAC_SUPPORT
 	select GENERIC_ARCH_TOPOLOGY if SMP
diff --git a/arch/riscv/include/asm/clint.h b/arch/riscv/include/asm/clint.h
new file mode 100644
index 0000000000000..0789fd37b40ae
--- /dev/null
+++ b/arch/riscv/include/asm/clint.h
@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020 Google, Inc
+ */
+
+#ifndef _ASM_RISCV_CLINT_H
+#define _ASM_RISCV_CLINT_H
+
+#include <linux/types.h>
+#include <asm/mmio.h>
+
+#ifdef CONFIG_RISCV_M_MODE
+/*
+ * This lives in the CLINT driver, but is accessed directly by timex.h to avoid
+ * any overhead when accessing the MMIO timer.
+ *
+ * The ISA defines mtime as a 64-bit memory-mapped register that increments at
+ * a constant frequency, but it doesn't define some other constraints we depend
+ * on (most notably ordering constraints, but also some simpler stuff like the
+ * memory layout).  Thus, this is called "clint_time_val" instead of something
+ * like "riscv_mtime", to signify that these non-ISA assumptions must hold.
+ */
+extern u64 __iomem *clint_time_val;
+#endif
+
+#endif
diff --git a/arch/riscv/include/asm/timex.h b/arch/riscv/include/asm/timex.h
index a3fb85d505d44..7f659dda00323 100644
--- a/arch/riscv/include/asm/timex.h
+++ b/arch/riscv/include/asm/timex.h
@@ -10,6 +10,31 @@
 
 typedef unsigned long cycles_t;
 
+#ifdef CONFIG_RISCV_M_MODE
+
+#include <asm/clint.h>
+
+#ifdef CONFIG_64BIT
+static inline cycles_t get_cycles(void)
+{
+	return readq_relaxed(clint_time_val);
+}
+#else /* !CONFIG_64BIT */
+static inline u32 get_cycles(void)
+{
+	return readl_relaxed(((u32 *)clint_time_val));
+}
+#define get_cycles get_cycles
+
+static inline u32 get_cycles_hi(void)
+{
+	return readl_relaxed(((u32 *)clint_time_val) + 1);
+}
+#define get_cycles_hi get_cycles_hi
+#endif /* CONFIG_64BIT */
+
+#else /* CONFIG_RISCV_M_MODE */
+
 static inline cycles_t get_cycles(void)
 {
 	return csr_read(CSR_TIME);
@@ -41,6 +66,8 @@ static inline u64 get_cycles64(void)
 }
 #endif /* CONFIG_64BIT */
 
+#endif /* !CONFIG_RISCV_M_MODE */
+
 #define ARCH_HAS_READ_CURRENT_TIMER
 static inline int read_current_timer(unsigned long *timer_val)
 {
diff --git a/drivers/clocksource/timer-clint.c b/drivers/clocksource/timer-clint.c
index 8eeafa82c03d3..d17367dee02cc 100644
--- a/drivers/clocksource/timer-clint.c
+++ b/drivers/clocksource/timer-clint.c
@@ -19,6 +19,11 @@
 #include <linux/interrupt.h>
 #include <linux/of_irq.h>
 #include <linux/smp.h>
+#include <linux/timex.h>
+
+#ifndef CONFIG_RISCV_M_MODE
+#include <asm/clint.h>
+#endif
 
 #define CLINT_IPI_OFF		0
 #define CLINT_TIMER_CMP_OFF	0x4000
@@ -31,6 +36,10 @@ static u64 __iomem *clint_timer_val;
 static unsigned long clint_timer_freq;
 static unsigned int clint_timer_irq;
 
+#ifdef CONFIG_RISCV_M_MODE
+u64 __iomem *clint_time_val;
+#endif
+
 static void clint_send_ipi(const struct cpumask *target)
 {
 	unsigned int cpu;
@@ -184,6 +193,14 @@ static int __init clint_timer_init_dt(struct device_node *np)
 	clint_timer_val = base + CLINT_TIMER_VAL_OFF;
 	clint_timer_freq = riscv_timebase;
 
+#ifdef CONFIG_RISCV_M_MODE
+	/*
+	 * Yes, that's an odd naming scheme.  time_val is public, but hopefully
+	 * will die in favor of something cleaner.
+	 */
+	clint_time_val = clint_timer_val;
+#endif
+
 	pr_info("%pOFP: timer running at %ld Hz\n", np, clint_timer_freq);
 
 	rc = clocksource_register_hz(&clint_clocksource, clint_timer_freq);
-- 
GitLab


From 19b835a5db93254a46cb90c95ddde6959d7e1e06 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Wed, 9 Sep 2020 07:16:38 +0900
Subject: [PATCH 1317/1341] kconfig: qconf: fix incomplete type 'struct gstr'
 warning

"make HOSTCXX=clang++ xconfig" reports the following:

  HOSTCXX scripts/kconfig/qconf.o
In file included from scripts/kconfig/qconf.cc:23:
In file included from scripts/kconfig/lkc.h:15:
scripts/kconfig/lkc_proto.h:26:13: warning: 'get_relations_str' has C-linkage specified, but returns incomplete type 'struct gstr' which could be incompatible with C [-Wreturn-type-c-linkage]
struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head);
            ^

Currently, get_relations_str() is declared before the struct gstr
definition.

Move all declarations of menu.c functions below.

BTW, some are declared in lkc.h and some in lkc_proto.h, but the
difference is unclear. I guess some refactoring is needed.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Boris Kolpackov <boris@codesynthesis.com>
---
 scripts/kconfig/lkc.h       | 47 +++++++++++++++++++++++--------------
 scripts/kconfig/lkc_proto.h | 14 -----------
 2 files changed, 30 insertions(+), 31 deletions(-)

diff --git a/scripts/kconfig/lkc.h b/scripts/kconfig/lkc.h
index d4ca8297364f9..8454649b17bd5 100644
--- a/scripts/kconfig/lkc.h
+++ b/scripts/kconfig/lkc.h
@@ -66,23 +66,6 @@ static inline void xfwrite(const void *str, size_t len, size_t count, FILE *out)
 		fprintf(stderr, "Error in writing or end of file.\n");
 }
 
-/* menu.c */
-void _menu_init(void);
-void menu_warn(struct menu *menu, const char *fmt, ...);
-struct menu *menu_add_menu(void);
-void menu_end_menu(void);
-void menu_add_entry(struct symbol *sym);
-void menu_add_dep(struct expr *dep);
-void menu_add_visibility(struct expr *dep);
-struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep);
-void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep);
-void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep);
-void menu_add_option_modules(void);
-void menu_add_option_defconfig_list(void);
-void menu_add_option_allnoconfig_y(void);
-void menu_finalize(struct menu *parent);
-void menu_set_type(int type);
-
 /* util.c */
 struct file *file_lookup(const char *name);
 void *xmalloc(size_t size);
@@ -109,6 +92,36 @@ void str_append(struct gstr *gs, const char *s);
 void str_printf(struct gstr *gs, const char *fmt, ...);
 const char *str_get(struct gstr *gs);
 
+/* menu.c */
+void _menu_init(void);
+void menu_warn(struct menu *menu, const char *fmt, ...);
+struct menu *menu_add_menu(void);
+void menu_end_menu(void);
+void menu_add_entry(struct symbol *sym);
+void menu_add_dep(struct expr *dep);
+void menu_add_visibility(struct expr *dep);
+struct property *menu_add_prompt(enum prop_type type, char *prompt, struct expr *dep);
+void menu_add_expr(enum prop_type type, struct expr *expr, struct expr *dep);
+void menu_add_symbol(enum prop_type type, struct symbol *sym, struct expr *dep);
+void menu_add_option_modules(void);
+void menu_add_option_defconfig_list(void);
+void menu_add_option_allnoconfig_y(void);
+void menu_finalize(struct menu *parent);
+void menu_set_type(int type);
+
+extern struct menu rootmenu;
+
+bool menu_is_empty(struct menu *menu);
+bool menu_is_visible(struct menu *menu);
+bool menu_has_prompt(struct menu *menu);
+const char *menu_get_prompt(struct menu *menu);
+struct menu *menu_get_root_menu(struct menu *menu);
+struct menu *menu_get_parent_menu(struct menu *menu);
+bool menu_has_help(struct menu *menu);
+const char *menu_get_help(struct menu *menu);
+struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head);
+void menu_get_ext_help(struct menu *menu, struct gstr *help);
+
 /* symbol.c */
 void sym_clear_all_valid(void);
 struct symbol *sym_choice_default(struct symbol *sym);
diff --git a/scripts/kconfig/lkc_proto.h b/scripts/kconfig/lkc_proto.h
index f9ab98238aeff..9e81be33c40fa 100644
--- a/scripts/kconfig/lkc_proto.h
+++ b/scripts/kconfig/lkc_proto.h
@@ -12,20 +12,6 @@ bool conf_get_changed(void);
 void conf_set_changed_callback(void (*fn)(void));
 void conf_set_message_callback(void (*fn)(const char *s));
 
-/* menu.c */
-extern struct menu rootmenu;
-
-bool menu_is_empty(struct menu *menu);
-bool menu_is_visible(struct menu *menu);
-bool menu_has_prompt(struct menu *menu);
-const char * menu_get_prompt(struct menu *menu);
-struct menu * menu_get_root_menu(struct menu *menu);
-struct menu * menu_get_parent_menu(struct menu *menu);
-bool menu_has_help(struct menu *menu);
-const char * menu_get_help(struct menu *menu);
-struct gstr get_relations_str(struct symbol **sym_arr, struct list_head *head);
-void menu_get_ext_help(struct menu *menu, struct gstr *help);
-
 /* symbol.c */
 extern struct symbol * symbol_hash[SYMBOL_HASHSIZE];
 
-- 
GitLab


From a46afd11414758233f23798cc5be51e554d04efe Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <masahiroy@kernel.org>
Date: Mon, 14 Sep 2020 23:59:48 +0900
Subject: [PATCH 1318/1341] kconfig: qconf: revive help message in the info
 view

Since commit 68fd110b3e7e ("kconfig: qconf: remove redundant help in
the info view"), the help message is no longer displayed.

I intended to drop duplicated "Symbol:", "Type:", but precious info
about help and reverse dependencies was lost too.

Revive it now.

"defined at" is contained in menu_get_ext_help(), so I made sure
to not display it twice.

Fixes: 68fd110b3e7e ("kconfig: qconf: remove redundant help in the info view")
Reported-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---
 scripts/kconfig/qconf.cc | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index c7216b9110fcd..8ce624a3b54b1 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1108,6 +1108,11 @@ void ConfigInfoView::menuInfo(void)
 		if (showDebug())
 			stream << debug_info(sym);
 
+		struct gstr help_gstr = str_new();
+
+		menu_get_ext_help(_menu, &help_gstr);
+		stream << print_filter(str_get(&help_gstr));
+		str_free(&help_gstr);
 	} else if (_menu->prompt) {
 		stream << "<big><b>";
 		stream << print_filter(_menu->prompt->text);
@@ -1119,11 +1124,11 @@ void ConfigInfoView::menuInfo(void)
 					   expr_print_help, &stream, E_NONE);
 				stream << "<br><br>";
 			}
+
+			stream << "defined at " << _menu->file->name << ":"
+			       << _menu->lineno << "<br><br>";
 		}
 	}
-	if (showDebug())
-		stream << "defined at " << _menu->file->name << ":"
-		       << _menu->lineno << "<br><br>";
 
 	setText(info);
 }
-- 
GitLab


From 02186d8897d49b0afd3c80b6cf23437d91024065 Mon Sep 17 00:00:00 2001
From: Dan Williams <dan.j.williams@intel.com>
Date: Fri, 18 Sep 2020 12:51:15 -0700
Subject: [PATCH 1319/1341] dm/dax: Fix table reference counts

A recent fix to the dm_dax_supported() flow uncovered a latent bug. When
dm_get_live_table() fails it is still required to drop the
srcu_read_lock(). Without this change the lvm2 test-suite triggers this
warning:

    # lvm2-testsuite --only pvmove-abort-all.sh

    WARNING: lock held when returning to user space!
    5.9.0-rc5+ #251 Tainted: G           OE
    ------------------------------------------------
    lvm/1318 is leaving the kernel with locks still held!
    1 lock held by lvm/1318:
     #0: ffff9372abb5a340 (&md->io_barrier){....}-{0:0}, at: dm_get_live_table+0x5/0xb0 [dm_mod]

...and later on this hang signature:

    INFO: task lvm:1344 blocked for more than 122 seconds.
          Tainted: G           OE     5.9.0-rc5+ #251
    "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
    task:lvm             state:D stack:    0 pid: 1344 ppid:     1 flags:0x00004000
    Call Trace:
     __schedule+0x45f/0xa80
     ? finish_task_switch+0x249/0x2c0
     ? wait_for_completion+0x86/0x110
     schedule+0x5f/0xd0
     schedule_timeout+0x212/0x2a0
     ? __schedule+0x467/0xa80
     ? wait_for_completion+0x86/0x110
     wait_for_completion+0xb0/0x110
     __synchronize_srcu+0xd1/0x160
     ? __bpf_trace_rcu_utilization+0x10/0x10
     __dm_suspend+0x6d/0x210 [dm_mod]
     dm_suspend+0xf6/0x140 [dm_mod]

Fixes: 7bf7eac8d648 ("dax: Arrange for dax_supported check to span multiple devices")
Cc: <stable@vger.kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: Mike Snitzer <snitzer@redhat.com>
Reported-by: Adrian Huang <ahuang12@lenovo.com>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Tested-by: Adrian Huang <ahuang12@lenovo.com>
Link: https://lore.kernel.org/r/160045867590.25663.7548541079217827340.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/md/dm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index fb0255d25e4b2..4a40df8af7d36 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1136,15 +1136,16 @@ static bool dm_dax_supported(struct dax_device *dax_dev, struct block_device *bd
 {
 	struct mapped_device *md = dax_get_private(dax_dev);
 	struct dm_table *map;
+	bool ret = false;
 	int srcu_idx;
-	bool ret;
 
 	map = dm_get_live_table(md, &srcu_idx);
 	if (!map)
-		return false;
+		goto out;
 
 	ret = dm_table_supports_dax(map, device_supports_dax, &blocksize);
 
+out:
 	dm_put_live_table(md, srcu_idx);
 
 	return ret;
-- 
GitLab


From e2ec5128254518cae320d5dc631b71b94160f663 Mon Sep 17 00:00:00 2001
From: Jan Kara <jack@suse.cz>
Date: Sun, 20 Sep 2020 08:54:42 -0700
Subject: [PATCH 1320/1341] dm: Call proper helper to determine dax support

DM was calling generic_fsdax_supported() to determine whether a device
referenced in the DM table supports DAX. However this is a helper for "leaf" device drivers so that
they don't have to duplicate common generic checks. High level code
should call dax_supported() helper which that calls into appropriate
helper for the particular device. This problem manifested itself as
kernel messages:

dm-3: error: dax access failed (-95)

when lvm2-testsuite run in cases where a DM device was stacked on top of
another DM device.

Fixes: 7bf7eac8d648 ("dax: Arrange for dax_supported check to span multiple devices")
Cc: <stable@vger.kernel.org>
Tested-by: Adrian Huang <ahuang12@lenovo.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/160061715195.13131.5503173247632041975.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/dax/super.c   |  4 ++++
 drivers/md/dm-table.c | 10 +++++++---
 include/linux/dax.h   | 22 ++++++++++++++++++++--
 3 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index e5767c83ea23d..b6284c5cae0a8 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -325,11 +325,15 @@ EXPORT_SYMBOL_GPL(dax_direct_access);
 bool dax_supported(struct dax_device *dax_dev, struct block_device *bdev,
 		int blocksize, sector_t start, sector_t len)
 {
+	if (!dax_dev)
+		return false;
+
 	if (!dax_alive(dax_dev))
 		return false;
 
 	return dax_dev->ops->dax_supported(dax_dev, bdev, blocksize, start, len);
 }
+EXPORT_SYMBOL_GPL(dax_supported);
 
 size_t dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr,
 		size_t bytes, struct iov_iter *i)
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
index 5edc3079e7c19..229f461e7def3 100644
--- a/drivers/md/dm-table.c
+++ b/drivers/md/dm-table.c
@@ -860,10 +860,14 @@ EXPORT_SYMBOL_GPL(dm_table_set_type);
 int device_supports_dax(struct dm_target *ti, struct dm_dev *dev,
 			sector_t start, sector_t len, void *data)
 {
-	int blocksize = *(int *) data;
+	int blocksize = *(int *) data, id;
+	bool rc;
 
-	return generic_fsdax_supported(dev->dax_dev, dev->bdev, blocksize,
-				       start, len);
+	id = dax_read_lock();
+	rc = dax_supported(dev->dax_dev, dev->bdev, blocksize, start, len);
+	dax_read_unlock(id);
+
+	return rc;
 }
 
 /* Check devices support synchronous DAX */
diff --git a/include/linux/dax.h b/include/linux/dax.h
index 6904d4e0b2e0a..497031392e0ad 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -130,6 +130,8 @@ static inline bool generic_fsdax_supported(struct dax_device *dax_dev,
 	return __generic_fsdax_supported(dax_dev, bdev, blocksize, start,
 			sectors);
 }
+bool dax_supported(struct dax_device *dax_dev, struct block_device *bdev,
+		int blocksize, sector_t start, sector_t len);
 
 static inline void fs_put_dax(struct dax_device *dax_dev)
 {
@@ -157,6 +159,13 @@ static inline bool generic_fsdax_supported(struct dax_device *dax_dev,
 	return false;
 }
 
+static inline bool dax_supported(struct dax_device *dax_dev,
+		struct block_device *bdev, int blocksize, sector_t start,
+		sector_t len)
+{
+	return false;
+}
+
 static inline void fs_put_dax(struct dax_device *dax_dev)
 {
 }
@@ -189,14 +198,23 @@ static inline void dax_unlock_page(struct page *page, dax_entry_t cookie)
 }
 #endif
 
+#if IS_ENABLED(CONFIG_DAX)
 int dax_read_lock(void);
 void dax_read_unlock(int id);
+#else
+static inline int dax_read_lock(void)
+{
+	return 0;
+}
+
+static inline void dax_read_unlock(int id)
+{
+}
+#endif /* CONFIG_DAX */
 bool dax_alive(struct dax_device *dax_dev);
 void *dax_get_private(struct dax_device *dax_dev);
 long dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff, long nr_pages,
 		void **kaddr, pfn_t *pfn);
-bool dax_supported(struct dax_device *dax_dev, struct block_device *bdev,
-		int blocksize, sector_t start, sector_t len);
 size_t dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr,
 		size_t bytes, struct iov_iter *i);
 size_t dax_copy_to_iter(struct dax_device *dax_dev, pgoff_t pgoff, void *addr,
-- 
GitLab


From d4c5da5049ac27c6ef8f6f98548c3a1ade352d25 Mon Sep 17 00:00:00 2001
From: Adrian Huang <ahuang12@lenovo.com>
Date: Thu, 17 Sep 2020 19:15:49 +0800
Subject: [PATCH 1321/1341] dax: Fix stack overflow when mounting fsdax pmem
 device

When mounting fsdax pmem device, commit 6180bb446ab6 ("dax: fix
detection of dax support for non-persistent memory block devices")
introduces the stack overflow [1][2]. Here is the call path for
mounting ext4 file system:
  ext4_fill_super
    bdev_dax_supported
      __bdev_dax_supported
        dax_supported
          generic_fsdax_supported
            __generic_fsdax_supported
              bdev_dax_supported

The call path leads to the infinite calling loop, so we cannot
call bdev_dax_supported() in __generic_fsdax_supported(). The sanity
checking of the variable 'dax_dev' is moved prior to the two
bdev_dax_pgoff() checks [3][4].

[1] https://lore.kernel.org/linux-nvdimm/1420999447.1004543.1600055488770.JavaMail.zimbra@redhat.com/
[2] https://lore.kernel.org/linux-nvdimm/alpine.LRH.2.02.2009141131220.30651@file01.intranet.prod.int.rdu2.redhat.com/
[3] https://lore.kernel.org/linux-nvdimm/CA+RJvhxBHriCuJhm-D8NvJRe3h2MLM+ZMFgjeJjrRPerMRLvdg@mail.gmail.com/
[4] https://lore.kernel.org/linux-nvdimm/20200903160608.GU878166@iweiny-DESK2.sc.intel.com/

Fixes: 6180bb446ab6 ("dax: fix detection of dax support for non-persistent memory block devices")
Reported-by: Yi Zhang <yi.zhang@redhat.com>
Reported-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Adrian Huang <ahuang12@lenovo.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Tested-by: Ritesh Harjani <riteshh@linux.ibm.com>
Cc: Coly Li <colyli@suse.de>
Cc: Ira Weiny <ira.weiny@intel.com>
Cc: John Pittman <jpittman@redhat.com>
Link: https://lore.kernel.org/r/20200917111549.6367-1-adrianhuang0701@gmail.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
 drivers/dax/super.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index b6284c5cae0a8..e84070b554636 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -85,6 +85,12 @@ bool __generic_fsdax_supported(struct dax_device *dax_dev,
 		return false;
 	}
 
+	if (!dax_dev) {
+		pr_debug("%s: error: dax unsupported by block device\n",
+				bdevname(bdev, buf));
+		return false;
+	}
+
 	err = bdev_dax_pgoff(bdev, start, PAGE_SIZE, &pgoff);
 	if (err) {
 		pr_info("%s: error: unaligned partition for dax\n",
@@ -100,12 +106,6 @@ bool __generic_fsdax_supported(struct dax_device *dax_dev,
 		return false;
 	}
 
-	if (!dax_dev || !bdev_dax_supported(bdev, blocksize)) {
-		pr_debug("%s: error: dax unsupported by block device\n",
-				bdevname(bdev, buf));
-		return false;
-	}
-
 	id = dax_read_lock();
 	len = dax_direct_access(dax_dev, pgoff, 1, &kaddr, &pfn);
 	len2 = dax_direct_access(dax_dev, pgoff_end, 1, &end_kaddr, &end_pfn);
-- 
GitLab


From 5868ec267de5eade3ef80bd8716d6b7621a0c4c0 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 20 Sep 2020 10:38:47 -0700
Subject: [PATCH 1322/1341] mm: fix wake_page_function() comment typos

Sedat Dilek pointed out some silly comment typo issues.

Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/filemap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/filemap.c b/mm/filemap.c
index 6aa08e7714ce6..5202e38ab79e8 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -990,7 +990,7 @@ void __init pagecache_init(void)
 
 /*
  * The page wait code treats the "wait->flags" somewhat unusually, because
- * we have multiple different kinds of waits, not just he usual "exclusive"
+ * we have multiple different kinds of waits, not just the usual "exclusive"
  * one.
  *
  * We have:
@@ -1011,7 +1011,7 @@ void __init pagecache_init(void)
  *
  *	This is the traditional exclusive wait.
  *
- *  (b) WQ_FLAG_EXCLUSIVE | WQ_FLAG_CUSTOM:
+ *  (c) WQ_FLAG_EXCLUSIVE | WQ_FLAG_CUSTOM:
  *
  *	The waiter is waiting to get the bit, and additionally wants the
  *	lock to be transferred to it for fair lock behavior. If the lock
-- 
GitLab


From ba4f184e126b751d1bffad5897f263108befc780 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 20 Sep 2020 16:33:55 -0700
Subject: [PATCH 1323/1341] Linux 5.9-rc6

---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 19d012810fbbc..2b66d33988783 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 VERSION = 5
 PATCHLEVEL = 9
 SUBLEVEL = 0
-EXTRAVERSION = -rc5
+EXTRAVERSION = -rc6
 NAME = Kleptomaniac Octopus
 
 # *DOCUMENTATION*
-- 
GitLab


From 3ad1c8ef083bef96ec922688966484be1039e6b5 Mon Sep 17 00:00:00 2001
From: Borislav Petkov <bp@suse.de>
Date: Mon, 21 Sep 2020 12:31:36 +0200
Subject: [PATCH 1324/1341] rcu/tree: Export rcu_idle_{enter,exit} to modules

Fix this link error:

  ERROR: modpost: "rcu_idle_enter" [drivers/acpi/processor.ko] undefined!
  ERROR: modpost: "rcu_idle_exit" [drivers/acpi/processor.ko] undefined!

when CONFIG_ACPI_PROCESSOR is built as module. PeterZ says that in light
of ARM needing those soon too, they should simply be exported.

Fixes: 1fecfdbb7acc ("ACPI: processor: Take over RCU-idle for C3-BM idle")
Reported-by: Sven Joachim <svenjoac@gmx.de>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Paul E. McKenney <paulmckrcu@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 kernel/rcu/tree.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c
index 8ce77d9ac716c..f78ee759af9cb 100644
--- a/kernel/rcu/tree.c
+++ b/kernel/rcu/tree.c
@@ -673,6 +673,7 @@ void rcu_idle_enter(void)
 	lockdep_assert_irqs_disabled();
 	rcu_eqs_enter(false);
 }
+EXPORT_SYMBOL_GPL(rcu_idle_enter);
 
 #ifdef CONFIG_NO_HZ_FULL
 /**
@@ -886,6 +887,7 @@ void rcu_idle_exit(void)
 	rcu_eqs_exit(false);
 	local_irq_restore(flags);
 }
+EXPORT_SYMBOL_GPL(rcu_idle_exit);
 
 #ifdef CONFIG_NO_HZ_FULL
 /**
-- 
GitLab


From 36050d8984ab743f9990a2eb97a0062fdc3d7bbd Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Fri, 4 Sep 2020 08:47:05 +0200
Subject: [PATCH 1325/1341] cpuidle: psci: Fix suspicious RCU usage

The commit eb1f00237aca ("lockdep,trace: Expose tracepoints"), started to
expose us for tracepoints. This lead to the following RCU splat on an ARM64
Qcom board.

[    5.529634] WARNING: suspicious RCU usage
[    5.537307] sdhci-pltfm: SDHCI platform and OF driver helper
[    5.541092] 5.9.0-rc3 #86 Not tainted
[    5.541098] -----------------------------
[    5.541105] ../include/trace/events/lock.h:37 suspicious rcu_dereference_check() usage!
[    5.541110]
[    5.541110] other info that might help us debug this:
[    5.541110]
[    5.541116]
[    5.541116] rcu_scheduler_active = 2, debug_locks = 1
[    5.541122] RCU used illegally from extended quiescent state!
[    5.541129] no locks held by swapper/0/0.
[    5.541134]
[    5.541134] stack backtrace:
[    5.541143] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.9.0-rc3 #86
[    5.541149] Hardware name: Qualcomm Technologies, Inc. APQ 8016 SBC (DT)
[    5.541157] Call trace:
[    5.568185] sdhci_msm 7864900.sdhci: Got CD GPIO
[    5.574186]  dump_backtrace+0x0/0x1c8
[    5.574206]  show_stack+0x14/0x20
[    5.574229]  dump_stack+0xe8/0x154
[    5.574250]  lockdep_rcu_suspicious+0xd4/0xf8
[    5.574269]  lock_acquire+0x3f0/0x460
[    5.574292]  _raw_spin_lock_irqsave+0x80/0xb0
[    5.574314]  __pm_runtime_suspend+0x4c/0x188
[    5.574341]  psci_enter_domain_idle_state+0x40/0xa0
[    5.574362]  cpuidle_enter_state+0xc0/0x610
[    5.646487]  cpuidle_enter+0x38/0x50
[    5.650651]  call_cpuidle+0x18/0x40
[    5.654467]  do_idle+0x228/0x278
[    5.657678]  cpu_startup_entry+0x24/0x70
[    5.661153]  rest_init+0x1a4/0x278
[    5.665061]  arch_call_rest_init+0xc/0x14
[    5.668272]  start_kernel+0x508/0x540

Following the path in pm_runtime_put_sync_suspend() from
psci_enter_domain_idle_state(), it seems like we end up using the RCU.
Therefore, let's simply silence the splat by informing the RCU about it
with RCU_NONIDLE.

Note that, this is a temporary solution. Instead we should strive to avoid
using RCU_NONIDLE (and similar), but rather push rcu_idle_enter|exit()
further down, closer to the arch specific code. However, as the CPU PM
notifiers are also using the RCU, additional rework is needed.

Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpuidle/cpuidle-psci.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-psci.c b/drivers/cpuidle/cpuidle-psci.c
index 74463841805f2..d928b37718bde 100644
--- a/drivers/cpuidle/cpuidle-psci.c
+++ b/drivers/cpuidle/cpuidle-psci.c
@@ -66,7 +66,7 @@ static int psci_enter_domain_idle_state(struct cpuidle_device *dev,
 		return -1;
 
 	/* Do runtime PM to manage a hierarchical CPU toplogy. */
-	pm_runtime_put_sync_suspend(pd_dev);
+	RCU_NONIDLE(pm_runtime_put_sync_suspend(pd_dev));
 
 	state = psci_get_domain_state();
 	if (!state)
@@ -74,7 +74,7 @@ static int psci_enter_domain_idle_state(struct cpuidle_device *dev,
 
 	ret = psci_cpu_suspend_enter(state) ? -1 : idx;
 
-	pm_runtime_get_sync(pd_dev);
+	RCU_NONIDLE(pm_runtime_get_sync(pd_dev));
 
 	cpu_pm_exit();
 
-- 
GitLab


From f8be29ebd427cbb41c0bc9a25610a6c7bb4f5bf7 Mon Sep 17 00:00:00 2001
From: Grygorii Strashko <grygorii.strashko@ti.com>
Date: Fri, 18 Sep 2020 19:55:18 +0300
Subject: [PATCH 1326/1341] PM: runtime: Fix timer_expires data type on 32-bit
 arches

Commit 8234f6734c5d ("PM-runtime: Switch autosuspend over to using
hrtimers") switched PM runtime autosuspend to use hrtimers and all
related time accounting in ns, but missed to update the timer_expires
data type in struct dev_pm_info to u64.

This causes the timer_expires value to be truncated on 32-bit
architectures when assignment is done from u64 values:

rpm_suspend()
|- dev->power.timer_expires = expires;

Fix it by changing the timer_expires type to u64.

Fixes: 8234f6734c5d ("PM-runtime: Switch autosuspend over to using hrtimers")
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Vincent Guittot <vincent.guittot@linaro.org>
Cc: 5.0+ <stable@vger.kernel.org> # 5.0+
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 include/linux/pm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/pm.h b/include/linux/pm.h
index a30a4b54df528..47aca6bac1d6a 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -590,7 +590,7 @@ struct dev_pm_info {
 #endif
 #ifdef CONFIG_PM
 	struct hrtimer		suspend_timer;
-	unsigned long		timer_expires;
+	u64			timer_expires;
 	struct work_struct	work;
 	wait_queue_head_t	wait_queue;
 	struct wake_irq		*wakeirq;
-- 
GitLab


From 1170433e6611402b869c583fa1fbfd85106ff066 Mon Sep 17 00:00:00 2001
From: Dmitry Osipenko <digetx@gmail.com>
Date: Thu, 9 Jul 2020 20:35:32 +0300
Subject: [PATCH 1327/1341] cpuidle: tegra: Correctly handle result of
 arm_cpuidle_simple_enter()

The enter() callback of CPUIDLE drivers returns index of the entered idle
state on success or a negative value on failure. The negative value could
any negative value, i.e. it doesn't necessarily needs to be a error code.
That's because CPUIDLE core only cares about the fact of failure and not
about the reason of the enter() failure.

Like every other enter() callback, the arm_cpuidle_simple_enter() returns
the entered idle-index on success. Unlike some of other drivers, it never
fails. It happened that TEGRA_C1=index=err=0 in the code of cpuidle-tegra
driver, and thus, there is no problem for the cpuidle-tegra driver created
by the typo in the code which assumes that the arm_cpuidle_simple_enter()
returns a error code.

The arm_cpuidle_simple_enter() also may return a -ENODEV error if CPU_IDLE
is disabled in a kernel's config, but all CPUIDLE drivers are disabled if
CPU_IDLE is disabled, including the cpuidle-tegra driver. So we can't ever
see the error code from arm_cpuidle_simple_enter() today.

Of course the code may get some changes in the future and then the
typo may transform into a real bug, so let's correct the typo! The
tegra_cpuidle_state_enter() is now changed to make it return the entered
idle-index on success and negative error code on fail, which puts it on
par with the arm_cpuidle_simple_enter(), making code consistent in regards
to the error handling.

This patch fixes a minor typo in the code, it doesn't fix any bugs.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpuidle/cpuidle-tegra.c | 34 +++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-tegra.c b/drivers/cpuidle/cpuidle-tegra.c
index a12fb141875a7..e8956706a2917 100644
--- a/drivers/cpuidle/cpuidle-tegra.c
+++ b/drivers/cpuidle/cpuidle-tegra.c
@@ -172,7 +172,7 @@ static int tegra_cpuidle_coupled_barrier(struct cpuidle_device *dev)
 static int tegra_cpuidle_state_enter(struct cpuidle_device *dev,
 				     int index, unsigned int cpu)
 {
-	int ret;
+	int err;
 
 	/*
 	 * CC6 state is the "CPU cluster power-off" state.  In order to
@@ -183,9 +183,9 @@ static int tegra_cpuidle_state_enter(struct cpuidle_device *dev,
 	 * CPU cores, GIC and L2 cache).
 	 */
 	if (index == TEGRA_CC6) {
-		ret = tegra_cpuidle_coupled_barrier(dev);
-		if (ret)
-			return ret;
+		err = tegra_cpuidle_coupled_barrier(dev);
+		if (err)
+			return err;
 	}
 
 	local_fiq_disable();
@@ -194,15 +194,15 @@ static int tegra_cpuidle_state_enter(struct cpuidle_device *dev,
 
 	switch (index) {
 	case TEGRA_C7:
-		ret = tegra_cpuidle_c7_enter();
+		err = tegra_cpuidle_c7_enter();
 		break;
 
 	case TEGRA_CC6:
-		ret = tegra_cpuidle_cc6_enter(cpu);
+		err = tegra_cpuidle_cc6_enter(cpu);
 		break;
 
 	default:
-		ret = -EINVAL;
+		err = -EINVAL;
 		break;
 	}
 
@@ -210,7 +210,7 @@ static int tegra_cpuidle_state_enter(struct cpuidle_device *dev,
 	tegra_pm_clear_cpu_in_lp2();
 	local_fiq_enable();
 
-	return ret;
+	return err ?: index;
 }
 
 static int tegra_cpuidle_adjust_state_index(int index, unsigned int cpu)
@@ -236,21 +236,27 @@ static int tegra_cpuidle_enter(struct cpuidle_device *dev,
 			       int index)
 {
 	unsigned int cpu = cpu_logical_map(dev->cpu);
-	int err;
+	int ret;
 
 	index = tegra_cpuidle_adjust_state_index(index, cpu);
 	if (dev->states_usage[index].disable)
 		return -1;
 
 	if (index == TEGRA_C1)
-		err = arm_cpuidle_simple_enter(dev, drv, index);
+		ret = arm_cpuidle_simple_enter(dev, drv, index);
 	else
-		err = tegra_cpuidle_state_enter(dev, index, cpu);
+		ret = tegra_cpuidle_state_enter(dev, index, cpu);
 
-	if (err && (err != -EINTR || index != TEGRA_CC6))
-		pr_err_once("failed to enter state %d err: %d\n", index, err);
+	if (ret < 0) {
+		if (ret != -EINTR || index != TEGRA_CC6)
+			pr_err_once("failed to enter state %d err: %d\n",
+				    index, ret);
+		index = -1;
+	} else {
+		index = ret;
+	}
 
-	return err ? -1 : index;
+	return index;
 }
 
 static int tegra114_enter_s2idle(struct cpuidle_device *dev,
-- 
GitLab


From 653f68b6ecd15cf147817bb01c2b7d02f4bffc8e Mon Sep 17 00:00:00 2001
From: Chen Yu <yu.c.chen@intel.com>
Date: Wed, 19 Aug 2020 11:23:54 +0800
Subject: [PATCH 1328/1341] ACPI: processor: Print more information when
 acpi_processor_evaluate_cst() fails

Some platforms have bogus _CST which might cause unexpectd behavior
in the CPU idle driver. Some bogus _CST might be unable to be
disassembled by acpica-tools due to broken format.

Print extra log if the _CST extraction/verification failes.

This can be used to help narrow down why the CPU idle driver fails
to behave as expected.

Suggested-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
[ rjw: Subject and changelog edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/acpi_processor.c | 34 ++++++++++++++++++++++++++++------
 1 file changed, 28 insertions(+), 6 deletions(-)

diff --git a/drivers/acpi/acpi_processor.c b/drivers/acpi/acpi_processor.c
index b51ddf3bb6167..412a9725cc1eb 100644
--- a/drivers/acpi/acpi_processor.c
+++ b/drivers/acpi/acpi_processor.c
@@ -798,22 +798,34 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
 		memset(&cx, 0, sizeof(cx));
 
 		element = &cst->package.elements[i];
-		if (element->type != ACPI_TYPE_PACKAGE)
+		if (element->type != ACPI_TYPE_PACKAGE) {
+			acpi_handle_info(handle, "_CST C%d type(%x) is not package, skip...\n",
+					 i, element->type);
 			continue;
+		}
 
-		if (element->package.count != 4)
+		if (element->package.count != 4) {
+			acpi_handle_info(handle, "_CST C%d package count(%d) is not 4, skip...\n",
+					 i, element->package.count);
 			continue;
+		}
 
 		obj = &element->package.elements[0];
 
-		if (obj->type != ACPI_TYPE_BUFFER)
+		if (obj->type != ACPI_TYPE_BUFFER) {
+			acpi_handle_info(handle, "_CST C%d package element[0] type(%x) is not buffer, skip...\n",
+					 i, obj->type);
 			continue;
+		}
 
 		reg = (struct acpi_power_register *)obj->buffer.pointer;
 
 		obj = &element->package.elements[1];
-		if (obj->type != ACPI_TYPE_INTEGER)
+		if (obj->type != ACPI_TYPE_INTEGER) {
+			acpi_handle_info(handle, "_CST C[%d] package element[1] type(%x) is not integer, skip...\n",
+					 i, obj->type);
 			continue;
+		}
 
 		cx.type = obj->integer.value;
 		/*
@@ -850,6 +862,8 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
 				cx.entry_method = ACPI_CSTATE_HALT;
 				snprintf(cx.desc, ACPI_CX_DESC_LEN, "ACPI HLT");
 			} else {
+				acpi_handle_info(handle, "_CST C%d declares FIXED_HARDWARE C-state but not supported in hardware, skip...\n",
+						 i);
 				continue;
 			}
 		} else if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
@@ -857,6 +871,8 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
 			snprintf(cx.desc, ACPI_CX_DESC_LEN, "ACPI IOPORT 0x%x",
 				 cx.address);
 		} else {
+			acpi_handle_info(handle, "_CST C%d space_id(%x) neither FIXED_HARDWARE nor SYSTEM_IO, skip...\n",
+					 i, reg->space_id);
 			continue;
 		}
 
@@ -864,14 +880,20 @@ int acpi_processor_evaluate_cst(acpi_handle handle, u32 cpu,
 			cx.valid = 1;
 
 		obj = &element->package.elements[2];
-		if (obj->type != ACPI_TYPE_INTEGER)
+		if (obj->type != ACPI_TYPE_INTEGER) {
+			acpi_handle_info(handle, "_CST C%d package element[2] type(%x) not integer, skip...\n",
+					 i, obj->type);
 			continue;
+		}
 
 		cx.latency = obj->integer.value;
 
 		obj = &element->package.elements[3];
-		if (obj->type != ACPI_TYPE_INTEGER)
+		if (obj->type != ACPI_TYPE_INTEGER) {
+			acpi_handle_info(handle, "_CST C%d package element[3] type(%x) not integer, skip...\n",
+					 i, obj->type);
 			continue;
+		}
 
 		memcpy(&info->states[++last_index], &cx, sizeof(cx));
 	}
-- 
GitLab


From 10942019040c5557556ec22aae0f771b2a1a1a6d Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Tue, 1 Sep 2020 16:28:58 +0200
Subject: [PATCH 1329/1341] firmware: psci: Extend psci_set_osi_mode() to allow
 reset to PC mode

The current user (cpuidle-psci) of psci_set_osi_mode() only needs to enable
the PSCI OSI mode. Although, as subsequent changes shows, there is a need
to be able to reset back into the PSCI PC mode.

Therefore, let's extend psci_set_osi_mode() to take a bool as in-parameter,
to let the user indicate whether to enable OSI or to switch back to PC
mode.

Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpuidle/cpuidle-psci-domain.c |  2 +-
 drivers/firmware/psci/psci.c          | 12 +++++++-----
 include/linux/psci.h                  |  2 +-
 3 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
index b6e9649ab0da3..b6ab0415f450a 100644
--- a/drivers/cpuidle/cpuidle-psci-domain.c
+++ b/drivers/cpuidle/cpuidle-psci-domain.c
@@ -278,7 +278,7 @@ static int psci_cpuidle_domain_probe(struct platform_device *pdev)
 		goto remove_pd;
 
 	/* Try to enable OSI mode. */
-	ret = psci_set_osi_mode();
+	ret = psci_set_osi_mode(true);
 	if (ret) {
 		pr_warn("failed to enable OSI mode: %d\n", ret);
 		psci_pd_remove_topology(np);
diff --git a/drivers/firmware/psci/psci.c b/drivers/firmware/psci/psci.c
index 92013ecc2d9ed..00af99b6f97c1 100644
--- a/drivers/firmware/psci/psci.c
+++ b/drivers/firmware/psci/psci.c
@@ -151,12 +151,15 @@ static u32 psci_get_version(void)
 	return invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
 }
 
-int psci_set_osi_mode(void)
+int psci_set_osi_mode(bool enable)
 {
+	unsigned long suspend_mode;
 	int err;
 
-	err = invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE,
-			     PSCI_1_0_SUSPEND_MODE_OSI, 0, 0);
+	suspend_mode = enable ? PSCI_1_0_SUSPEND_MODE_OSI :
+			PSCI_1_0_SUSPEND_MODE_PC;
+
+	err = invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE, suspend_mode, 0, 0);
 	return psci_to_linux_errno(err);
 }
 
@@ -546,8 +549,7 @@ static int __init psci_1_0_init(struct device_node *np)
 		pr_info("OSI mode supported.\n");
 
 		/* Default to PC mode. */
-		invoke_psci_fn(PSCI_1_0_FN_SET_SUSPEND_MODE,
-			       PSCI_1_0_SUSPEND_MODE_PC, 0, 0);
+		psci_set_osi_mode(false);
 	}
 
 	return 0;
diff --git a/include/linux/psci.h b/include/linux/psci.h
index 14ad9b9ebcd66..2a1bfb890e588 100644
--- a/include/linux/psci.h
+++ b/include/linux/psci.h
@@ -18,7 +18,7 @@ bool psci_tos_resident_on(int cpu);
 
 int psci_cpu_suspend_enter(u32 state);
 bool psci_power_state_is_valid(u32 state);
-int psci_set_osi_mode(void);
+int psci_set_osi_mode(bool enable);
 bool psci_has_osi_support(void);
 
 struct psci_operations {
-- 
GitLab


From 70c179b49870929ca183421935415622d30875b5 Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Tue, 1 Sep 2020 16:28:59 +0200
Subject: [PATCH 1330/1341] cpuidle: psci: Allow PM domain to be initialized
 even if no OSI mode

If the PSCI OSI mode isn't supported or fails to be enabled, the PM domain
topology with the genpd providers isn't initialized. This is perfectly fine
from cpuidle-psci point of view.

However, since the PM domain topology in the DTS files is a description of
the HW, no matter of whether the PSCI OSI mode is supported or not, other
consumers besides the CPUs may rely on it.

Therefore, let's always allow the initialization of the PM domain topology
to succeed, independently of whether the PSCI OSI mode is supported.
Consequentially we need to track if we succeed to enable the OSI mode, as
to know when a domain idlestate can be selected.

Note that, CPU devices are still not being attached to the PM domain
topology, unless the PSCI OSI mode is supported.

Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpuidle/cpuidle-psci-domain.c | 59 ++++++++++++++-------------
 1 file changed, 31 insertions(+), 28 deletions(-)

diff --git a/drivers/cpuidle/cpuidle-psci-domain.c b/drivers/cpuidle/cpuidle-psci-domain.c
index b6ab0415f450a..4a031c62f92a1 100644
--- a/drivers/cpuidle/cpuidle-psci-domain.c
+++ b/drivers/cpuidle/cpuidle-psci-domain.c
@@ -105,7 +105,7 @@ static void psci_pd_free_states(struct genpd_power_state *states,
 	kfree(states);
 }
 
-static int psci_pd_init(struct device_node *np)
+static int psci_pd_init(struct device_node *np, bool use_osi)
 {
 	struct generic_pm_domain *pd;
 	struct psci_pd_provider *pd_provider;
@@ -135,11 +135,16 @@ static int psci_pd_init(struct device_node *np)
 
 	pd->free_states = psci_pd_free_states;
 	pd->name = kbasename(pd->name);
-	pd->power_off = psci_pd_power_off;
 	pd->states = states;
 	pd->state_count = state_count;
 	pd->flags |= GENPD_FLAG_IRQ_SAFE | GENPD_FLAG_CPU_DOMAIN;
 
+	/* Allow power off when OSI has been successfully enabled. */
+	if (use_osi)
+		pd->power_off = psci_pd_power_off;
+	else
+		pd->flags |= GENPD_FLAG_ALWAYS_ON;
+
 	/* Use governor for CPU PM domains if it has some states to manage. */
 	pd_gov = state_count > 0 ? &pm_domain_cpu_gov : NULL;
 
@@ -190,7 +195,7 @@ static void psci_pd_remove(void)
 	}
 }
 
-static int psci_pd_init_topology(struct device_node *np, bool add)
+static int psci_pd_init_topology(struct device_node *np)
 {
 	struct device_node *node;
 	struct of_phandle_args child, parent;
@@ -203,9 +208,7 @@ static int psci_pd_init_topology(struct device_node *np, bool add)
 
 		child.np = node;
 		child.args_count = 0;
-
-		ret = add ? of_genpd_add_subdomain(&parent, &child) :
-			of_genpd_remove_subdomain(&parent, &child);
+		ret = of_genpd_add_subdomain(&parent, &child);
 		of_node_put(parent.np);
 		if (ret) {
 			of_node_put(node);
@@ -216,14 +219,20 @@ static int psci_pd_init_topology(struct device_node *np, bool add)
 	return 0;
 }
 
-static int psci_pd_add_topology(struct device_node *np)
+static bool psci_pd_try_set_osi_mode(void)
 {
-	return psci_pd_init_topology(np, true);
-}
+	int ret;
 
-static void psci_pd_remove_topology(struct device_node *np)
-{
-	psci_pd_init_topology(np, false);
+	if (!psci_has_osi_support())
+		return false;
+
+	ret = psci_set_osi_mode(true);
+	if (ret) {
+		pr_warn("failed to enable OSI mode: %d\n", ret);
+		return false;
+	}
+
+	return true;
 }
 
 static void psci_cpuidle_domain_sync_state(struct device *dev)
@@ -244,14 +253,14 @@ static int psci_cpuidle_domain_probe(struct platform_device *pdev)
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct device_node *node;
+	bool use_osi;
 	int ret = 0, pd_count = 0;
 
 	if (!np)
 		return -ENODEV;
 
-	/* Currently limit the hierarchical topology to be used in OSI mode. */
-	if (!psci_has_osi_support())
-		return 0;
+	/* If OSI mode is supported, let's try to enable it. */
+	use_osi = psci_pd_try_set_osi_mode();
 
 	/*
 	 * Parse child nodes for the "#power-domain-cells" property and
@@ -261,7 +270,7 @@ static int psci_cpuidle_domain_probe(struct platform_device *pdev)
 		if (!of_find_property(node, "#power-domain-cells", NULL))
 			continue;
 
-		ret = psci_pd_init(node);
+		ret = psci_pd_init(node, use_osi);
 		if (ret)
 			goto put_node;
 
@@ -270,30 +279,24 @@ static int psci_cpuidle_domain_probe(struct platform_device *pdev)
 
 	/* Bail out if not using the hierarchical CPU topology. */
 	if (!pd_count)
-		return 0;
+		goto no_pd;
 
 	/* Link genpd masters/subdomains to model the CPU topology. */
-	ret = psci_pd_add_topology(np);
+	ret = psci_pd_init_topology(np);
 	if (ret)
 		goto remove_pd;
 
-	/* Try to enable OSI mode. */
-	ret = psci_set_osi_mode(true);
-	if (ret) {
-		pr_warn("failed to enable OSI mode: %d\n", ret);
-		psci_pd_remove_topology(np);
-		goto remove_pd;
-	}
-
 	pr_info("Initialized CPU PM domain topology\n");
 	return 0;
 
 put_node:
 	of_node_put(node);
 remove_pd:
-	if (pd_count)
-		psci_pd_remove();
+	psci_pd_remove();
 	pr_err("failed to create CPU PM domains ret=%d\n", ret);
+no_pd:
+	if (use_osi)
+		psci_set_osi_mode(false);
 	return ret;
 }
 
-- 
GitLab


From 3ffe2e7318ba705b8e0060d4696cafc75170e819 Mon Sep 17 00:00:00 2001
From: Liu Shixin <liushixin2@huawei.com>
Date: Tue, 15 Sep 2020 11:26:29 +0800
Subject: [PATCH 1331/1341] PM: AVS: qcom-cpr: simplify the return expression
 of cpr_disable()

Simplify the return expression.

Signed-off-by: Liu Shixin <liushixin2@huawei.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Kevin Hilman <khilman@baylibre.com>
[ rjw: Minor subject edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/power/avs/qcom-cpr.c | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/drivers/power/avs/qcom-cpr.c b/drivers/power/avs/qcom-cpr.c
index bd7c3e48b3860..b24cc77d1889f 100644
--- a/drivers/power/avs/qcom-cpr.c
+++ b/drivers/power/avs/qcom-cpr.c
@@ -665,8 +665,6 @@ static int cpr_enable(struct cpr_drv *drv)
 
 static int cpr_disable(struct cpr_drv *drv)
 {
-	int ret;
-
 	mutex_lock(&drv->lock);
 
 	if (cpr_is_allowed(drv)) {
@@ -676,11 +674,7 @@ static int cpr_disable(struct cpr_drv *drv)
 
 	mutex_unlock(&drv->lock);
 
-	ret = regulator_disable(drv->vdd_apc);
-	if (ret)
-		return ret;
-
-	return 0;
+	return regulator_disable(drv->vdd_apc);
 }
 
 static int cpr_config(struct cpr_drv *drv)
-- 
GitLab


From bd805274577457f301bf826f86543f550cf5c1ef Mon Sep 17 00:00:00 2001
From: Ulf Hansson <ulf.hansson@linaro.org>
Date: Tue, 22 Sep 2020 11:15:50 +0200
Subject: [PATCH 1332/1341] cpuidle: Drop misleading comments about RCU usage

The commit 1098582a0f6c ("sched,idle,rcu: Push rcu_idle deeper into the
idle path"), moved the calls rcu_idle_enter|exit() into the cpuidle core.

However, it forgot to remove a couple of comments in enter_s2idle_proper()
about why RCU_NONIDLE earlier was needed. So, let's drop them as they have
become a bit misleading.

Fixes: 1098582a0f6c ("sched,idle,rcu: Push rcu_idle deeper into the idle path")
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/cpuidle/cpuidle.c | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 6c7e5621cf9a8..29e84687f3c39 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -142,11 +142,6 @@ static void enter_s2idle_proper(struct cpuidle_driver *drv,
 
 	time_start = ns_to_ktime(local_clock());
 
-	/*
-	 * trace_suspend_resume() called by tick_freeze() for the last CPU
-	 * executing it contains RCU usage regarded as invalid in the idle
-	 * context, so tell RCU about that.
-	 */
 	tick_freeze();
 	/*
 	 * The state used here cannot be a "coupled" one, because the "coupled"
@@ -159,11 +154,6 @@ static void enter_s2idle_proper(struct cpuidle_driver *drv,
 	target_state->enter_s2idle(dev, drv, index);
 	if (WARN_ON_ONCE(!irqs_disabled()))
 		local_irq_disable();
-	/*
-	 * timekeeping_resume() that will be called by tick_unfreeze() for the
-	 * first CPU executing it calls functions containing RCU read-side
-	 * critical sections, so tell RCU about that.
-	 */
 	if (!(target_state->flags & CPUIDLE_FLAG_RCU_IDLE))
 		rcu_idle_exit();
 	tick_unfreeze();
-- 
GitLab


From bf23e1cd46d6a3277aad5921e14eac40bf32b90a Mon Sep 17 00:00:00 2001
From: Kevin Hilman <khilman@baylibre.com>
Date: Fri, 18 Sep 2020 13:16:33 -0700
Subject: [PATCH 1333/1341] MAINTAINERS: drop myself from PM AVS drivers

I haven't had the time or the expertise to adequately review and
maintain these drivers for awhile, so make it official.

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 MAINTAINERS | 1 -
 1 file changed, 1 deletion(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index d746519253c3a..4f1a56f6efaa7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -5380,7 +5380,6 @@ F:	include/linux/kobj*
 F:	lib/kobj*
 
 DRIVERS FOR ADAPTIVE VOLTAGE SCALING (AVS)
-M:	Kevin Hilman <khilman@kernel.org>
 M:	Nishanth Menon <nm@ti.com>
 L:	linux-pm@vger.kernel.org
 S:	Maintained
-- 
GitLab


From 955921289dcdbc49b46a731ec07978fb7d4e1fc7 Mon Sep 17 00:00:00 2001
From: "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Date: Wed, 23 Sep 2020 13:50:12 +0200
Subject: [PATCH 1334/1341] ACPI: processor: Fix build for
 ARCH_APICTIMER_STOPS_ON_C3 unset

Fix the lapic_timer_needs_broadcast() stub for
ARCH_APICTIMER_STOPS_ON_C3 unset to actually return
a value.

Fixes: aa6b43d57f99 ("ACPI: processor: Use CPUIDLE_FLAG_TIMER_STOP")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/processor_idle.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 7ecb90e90afde..f66236cff69b0 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -176,6 +176,7 @@ static void lapic_timer_propagate_broadcast(struct acpi_processor *pr) { }
 static bool lapic_timer_needs_broadcast(struct acpi_processor *pr,
 					struct acpi_processor_cx *cx)
 {
+	return false;
 }
 
 #endif
-- 
GitLab


From f49735f4978f479b0de4f50ab217d5a56bc83c55 Mon Sep 17 00:00:00 2001
From: Lina Iyer <ilina@codeaurora.org>
Date: Tue, 22 Sep 2020 12:34:16 -0600
Subject: [PATCH 1335/1341] cpuidle: record state entry rejection statistics

CPUs may fail to enter the chosen idle state if there was a
pending interrupt, causing the cpuidle driver to return an error
value.

Record that and export it via sysfs along with the other idle state
statistics.

This could prove useful in understanding behavior of the governor
and the system during usecases that involve multiple CPUs.

Signed-off-by: Lina Iyer <ilina@codeaurora.org>
[ rjw: Changelog and documentation edits ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 Documentation/admin-guide/pm/cpuidle.rst | 9 +++++++++
 drivers/cpuidle/cpuidle.c                | 1 +
 drivers/cpuidle/sysfs.c                  | 3 +++
 include/linux/cpuidle.h                  | 1 +
 4 files changed, 14 insertions(+)

diff --git a/Documentation/admin-guide/pm/cpuidle.rst b/Documentation/admin-guide/pm/cpuidle.rst
index a96a423e37791..830868e526f48 100644
--- a/Documentation/admin-guide/pm/cpuidle.rst
+++ b/Documentation/admin-guide/pm/cpuidle.rst
@@ -528,6 +528,10 @@ object corresponding to it, as follows:
 	Total number of times the hardware has been asked by the given CPU to
 	enter this idle state.
 
+``rejected``
+	Total number of times a request to enter this idle state on the given
+	CPU was rejected.
+
 The :file:`desc` and :file:`name` files both contain strings.  The difference
 between them is that the name is expected to be more concise, while the
 description may be longer and it may contain white space or special characters.
@@ -572,6 +576,11 @@ particular case.  For these reasons, the only reliable way to find out how
 much time has been spent by the hardware in different idle states supported by
 it is to use idle state residency counters in the hardware, if available.
 
+Generally, an interrupt received when trying to enter an idle state causes the
+idle state entry request to be rejected, in which case the ``CPUIdle`` driver
+may return an error code to indicate that this was the case. The :file:`usage`
+and :file:`rejected` files report the number of times the given idle state
+was entered successfully or rejected, respectively.
 
 .. _cpu-pm-qos:
 
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 6c7e5621cf9a8..0ed5030b89d6d 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -307,6 +307,7 @@ int cpuidle_enter_state(struct cpuidle_device *dev, struct cpuidle_driver *drv,
 		}
 	} else {
 		dev->last_residency_ns = 0;
+		dev->states_usage[index].rejected++;
 	}
 
 	return entered_state;
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index 091d1caceb417..53ec9585ccd44 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -256,6 +256,7 @@ define_show_state_time_function(exit_latency)
 define_show_state_time_function(target_residency)
 define_show_state_function(power_usage)
 define_show_state_ull_function(usage)
+define_show_state_ull_function(rejected)
 define_show_state_str_function(name)
 define_show_state_str_function(desc)
 define_show_state_ull_function(above)
@@ -312,6 +313,7 @@ define_one_state_ro(latency, show_state_exit_latency);
 define_one_state_ro(residency, show_state_target_residency);
 define_one_state_ro(power, show_state_power_usage);
 define_one_state_ro(usage, show_state_usage);
+define_one_state_ro(rejected, show_state_rejected);
 define_one_state_ro(time, show_state_time);
 define_one_state_rw(disable, show_state_disable, store_state_disable);
 define_one_state_ro(above, show_state_above);
@@ -325,6 +327,7 @@ static struct attribute *cpuidle_state_default_attrs[] = {
 	&attr_residency.attr,
 	&attr_power.attr,
 	&attr_usage.attr,
+	&attr_rejected.attr,
 	&attr_time.attr,
 	&attr_disable.attr,
 	&attr_above.attr,
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index 6175c77bf25e7..ed0da0e58e8b0 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -38,6 +38,7 @@ struct cpuidle_state_usage {
 	u64			time_ns;
 	unsigned long long	above; /* Number of times it's been too deep */
 	unsigned long long	below; /* Number of times it's been too shallow */
+	unsigned long long	rejected; /* Number of times idle entry was rejected */
 #ifdef CONFIG_SUSPEND
 	unsigned long long	s2idle_usage;
 	unsigned long long	s2idle_time; /* in US */
-- 
GitLab


From 8a3decac087aa897df5af04358c2089e52e70ac4 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Tue, 18 Aug 2020 22:24:25 +0800
Subject: [PATCH 1336/1341] ACPI: Add out of bounds and numa_off protections to
 pxm_to_node()

The function should check the validity of the pxm value before using
it to index the pxm_to_node_map[] array.

Whilst hardening this code may be good in general, the main intent
here is to enable following patches that use this function to replace
acpi_map_pxm_to_node() for non SRAT usecases which should return
NO_NUMA_NODE for PXM entries not matching with those in SRAT.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Barry Song <song.bao.hua@hisilicon.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/numa/srat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c
index 15bbaab8500b9..1fb486f46ee20 100644
--- a/drivers/acpi/numa/srat.c
+++ b/drivers/acpi/numa/srat.c
@@ -31,7 +31,7 @@ int acpi_numa __initdata;
 
 int pxm_to_node(int pxm)
 {
-	if (pxm < 0)
+	if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
 		return NUMA_NO_NODE;
 	return pxm_to_node_map[pxm];
 }
-- 
GitLab


From 01feba590cd610780c463aa3d498200ba4503703 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Tue, 18 Aug 2020 22:24:26 +0800
Subject: [PATCH 1337/1341] ACPI: Do not create new NUMA domains from ACPI
 static tables that are not SRAT

Several ACPI static tables contain references to proximity domains.

ACPI 6.3 has clarified that only entries in SRAT may define a new
domain (sec 5.2.16).

Those tables described in the ACPI spec have additional clarifying text.

NFIT: Table 5-132,

"Integer that represents the proximity domain to which the memory
 belongs. This number must match with corresponding entry in the
 SRAT table."

HMAT: Table 5-145,

"... This number must match with the corresponding entry in the SRAT
 table's processor affinity structure ... if the initiator is a processor,
 or the Generic Initiator Affinity Structure if the initiator is a generic
 initiator".

IORT and DMAR are defined by external specifications.

Intel Virtualization Technology for Directed I/O Rev 3.1 does not make any
explicit statements, but the general SRAT statement above will still apply.
https://software.intel.com/sites/default/files/managed/c5/15/vt-directed-io-spec.pdf

IO Remapping Table, Platform Design Document rev D, also makes not explicit
statement, but refers to ACPI SRAT table for more information and again the
generic SRAT statement above applies.
https://developer.arm.com/documentation/den0049/d/

In conclusion, any proximity domain specified in these tables, should be a
reference to a proximity domain also found in SRAT, and they should not be
able to instantiate a new domain.  Hence we switch to pxm_to_node() which
will only return existing nodes.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Barry Song <song.bao.hua@hisilicon.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/arm64/iort.c  | 2 +-
 drivers/acpi/nfit/core.c   | 3 +--
 drivers/acpi/numa/hmat.c   | 2 +-
 drivers/iommu/intel/dmar.c | 2 +-
 4 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
index ec782e4a0fe41..26005a15cb8b8 100644
--- a/drivers/acpi/arm64/iort.c
+++ b/drivers/acpi/arm64/iort.c
@@ -1335,7 +1335,7 @@ static int  __init arm_smmu_v3_set_proximity(struct device *dev,
 
 	smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
 	if (smmu->flags & ACPI_IORT_SMMU_V3_PXM_VALID) {
-		int dev_node = acpi_map_pxm_to_node(smmu->pxm);
+		int dev_node = pxm_to_node(smmu->pxm);
 
 		if (dev_node != NUMA_NO_NODE && !node_online(dev_node))
 			return -EINVAL;
diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index 26dd208a0d636..ea0557cb54f78 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -3008,8 +3008,7 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
 	if (spa->flags & ACPI_NFIT_PROXIMITY_VALID) {
 		ndr_desc->numa_node = acpi_map_pxm_to_online_node(
 						spa->proximity_domain);
-		ndr_desc->target_node = acpi_map_pxm_to_node(
-				spa->proximity_domain);
+		ndr_desc->target_node = pxm_to_node(spa->proximity_domain);
 	} else {
 		ndr_desc->numa_node = NUMA_NO_NODE;
 		ndr_desc->target_node = NUMA_NO_NODE;
diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
index 2c32cfb723701..cf6df2df26cda 100644
--- a/drivers/acpi/numa/hmat.c
+++ b/drivers/acpi/numa/hmat.c
@@ -666,7 +666,7 @@ static void hmat_register_target_device(struct memory_target *target,
 
 	pdev->dev.numa_node = acpi_map_pxm_to_online_node(target->memory_pxm);
 	info = (struct memregion_info) {
-		.target_node = acpi_map_pxm_to_node(target->memory_pxm),
+		.target_node = pxm_to_node(target->memory_pxm),
 	};
 	rc = platform_device_add_data(pdev, &info, sizeof(info));
 	if (rc < 0) {
diff --git a/drivers/iommu/intel/dmar.c b/drivers/iommu/intel/dmar.c
index 93e6345f3414f..2f3badd41e1b2 100644
--- a/drivers/iommu/intel/dmar.c
+++ b/drivers/iommu/intel/dmar.c
@@ -473,7 +473,7 @@ static int dmar_parse_one_rhsa(struct acpi_dmar_header *header, void *arg)
 	rhsa = (struct acpi_dmar_rhsa *)header;
 	for_each_drhd_unit(drhd) {
 		if (drhd->reg_base_addr == rhsa->base_address) {
-			int node = acpi_map_pxm_to_node(rhsa->proximity_domain);
+			int node = pxm_to_node(rhsa->proximity_domain);
 
 			if (!node_online(node))
 				node = NUMA_NO_NODE;
-- 
GitLab


From fe205d984e7730f4d21f6f8ebc60f0698404ac31 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Tue, 18 Aug 2020 22:24:27 +0800
Subject: [PATCH 1338/1341] ACPI: Remove side effect of partly creating a node
 in acpi_map_pxm_to_online_node()

While this function will only return an online node, it can have the side
effect of partially creating a new node.  The existing comments suggest this
is intentional, but the usecases of this function are related to NFIT and
HMAT parsing, neither of which should be able to define new nodes.

One route by which the existing behaviour would cause a crash is to have a
_PXM entry in ACPI DSDT attempt to place a device within this partly
created proximity domain. A subsequent call to devm_kzalloc() or similar
would result in an attempt to allocate memory on a node for which zone
lists have not been set up and a NULL pointer dereference.

Prevent such cases by switching to pxm_to_node() within
acpi_map_pxm_to_online_node() which cannot cause a new node to be
partly created. If one would previously have been created we now
return NO_NUMA_NODE.  Documentation updated to reflect this change.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 include/linux/acpi.h | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 1e4cdc6c7ae20..a9fd122ae878b 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -430,13 +430,12 @@ int acpi_get_node(acpi_handle handle);
  * ACPI device drivers, which are called after the NUMA initialization has
  * completed in the kernel, can call this interface to obtain their device
  * NUMA topology from ACPI tables.  Such drivers do not have to deal with
- * offline nodes.  A node may be offline when a device proximity ID is
- * unique, SRAT memory entry does not exist, or NUMA is disabled, ex.
- * "numa=off" on x86.
+ * offline nodes.  A node may be offline when SRAT memory entry does not exist,
+ * or NUMA is disabled, ex. "numa=off" on x86.
  */
 static inline int acpi_map_pxm_to_online_node(int pxm)
 {
-	int node = acpi_map_pxm_to_node(pxm);
+	int node = pxm_to_node(pxm);
 
 	return numa_map_to_online_node(node);
 }
-- 
GitLab


From 4eb3723f18e9ba4d4b13d82b6f7e68dd50a852ea Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Tue, 18 Aug 2020 22:24:28 +0800
Subject: [PATCH 1339/1341] ACPI: Rename acpi_map_pxm_to_online_node() to
 pxm_to_online_node()

As this function is no longer allowed to create new mappings
let us rename it to reflect this.

Note all nodes should already exist before any of the users
of this function are called.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/nfit/core.c | 3 +--
 drivers/acpi/numa/hmat.c | 2 +-
 include/linux/acpi.h     | 8 ++++----
 3 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c
index ea0557cb54f78..8df2f16d1fdf0 100644
--- a/drivers/acpi/nfit/core.c
+++ b/drivers/acpi/nfit/core.c
@@ -3006,8 +3006,7 @@ static int acpi_nfit_register_region(struct acpi_nfit_desc *acpi_desc,
 	ndr_desc->provider_data = nfit_spa;
 	ndr_desc->attr_groups = acpi_nfit_region_attribute_groups;
 	if (spa->flags & ACPI_NFIT_PROXIMITY_VALID) {
-		ndr_desc->numa_node = acpi_map_pxm_to_online_node(
-						spa->proximity_domain);
+		ndr_desc->numa_node = pxm_to_online_node(spa->proximity_domain);
 		ndr_desc->target_node = pxm_to_node(spa->proximity_domain);
 	} else {
 		ndr_desc->numa_node = NUMA_NO_NODE;
diff --git a/drivers/acpi/numa/hmat.c b/drivers/acpi/numa/hmat.c
index cf6df2df26cda..e7add2609c03b 100644
--- a/drivers/acpi/numa/hmat.c
+++ b/drivers/acpi/numa/hmat.c
@@ -664,7 +664,7 @@ static void hmat_register_target_device(struct memory_target *target,
 		goto out_pdev;
 	}
 
-	pdev->dev.numa_node = acpi_map_pxm_to_online_node(target->memory_pxm);
+	pdev->dev.numa_node = pxm_to_online_node(target->memory_pxm);
 	info = (struct memregion_info) {
 		.target_node = pxm_to_node(target->memory_pxm),
 	};
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index a9fd122ae878b..e9f6cd67943e4 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -420,10 +420,10 @@ int acpi_map_pxm_to_node(int pxm);
 int acpi_get_node(acpi_handle handle);
 
 /**
- * acpi_map_pxm_to_online_node - Map proximity ID to online node
+ * pxm_to_online_node - Map proximity ID to online node
  * @pxm: ACPI proximity ID
  *
- * This is similar to acpi_map_pxm_to_node(), but always returns an online
+ * This is similar to pxm_to_node(), but always returns an online
  * node.  When the mapped node from a given proximity ID is offline, it
  * looks up the node distance table and returns the nearest online node.
  *
@@ -433,14 +433,14 @@ int acpi_get_node(acpi_handle handle);
  * offline nodes.  A node may be offline when SRAT memory entry does not exist,
  * or NUMA is disabled, ex. "numa=off" on x86.
  */
-static inline int acpi_map_pxm_to_online_node(int pxm)
+static inline int pxm_to_online_node(int pxm)
 {
 	int node = pxm_to_node(pxm);
 
 	return numa_map_to_online_node(node);
 }
 #else
-static inline int acpi_map_pxm_to_online_node(int pxm)
+static inline int pxm_to_online_node(int pxm)
 {
 	return 0;
 }
-- 
GitLab


From a62d07e0006a3a3ce77041ca07f3c488ec880790 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Tue, 18 Aug 2020 22:24:29 +0800
Subject: [PATCH 1340/1341] ACPI: Remove side effect of partly creating a node
 in acpi_get_node()

acpi_get_node() calls acpi_get_pxm() to evaluate the _PXM AML method
for entries found in DSDT/SSDT. ACPI 6.3 sec 6.2.14 states
"_PXM evaluates to an integer that identifies a device as belonging to
 a Proximity Domain defined in the System Resource Affinity Table (SRAT)."
Hence a _PXM method should not result in creation of a new NUMA node.

Before this patch, _PXM could result in partial instantiation of
NUMA node, missing elements such as zone lists.  A call to
devm_kzalloc(), for example, results in a NULL pointer dereference.

This patch therefore replaces the acpi_map_pxm_to_node() with a call
to pxm_to_node().

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Barry Song <song.bao.hua@hisilicon.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/acpi/numa/srat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/acpi/numa/srat.c b/drivers/acpi/numa/srat.c
index 1fb486f46ee20..2c9a66c203ff5 100644
--- a/drivers/acpi/numa/srat.c
+++ b/drivers/acpi/numa/srat.c
@@ -436,6 +436,6 @@ int acpi_get_node(acpi_handle handle)
 
 	pxm = acpi_get_pxm(handle);
 
-	return acpi_map_pxm_to_node(pxm);
+	return pxm_to_node(pxm);
 }
 EXPORT_SYMBOL(acpi_get_node);
-- 
GitLab


From 95ac5bf4e471ab1f37bca522e5ea4e474fbcec31 Mon Sep 17 00:00:00 2001
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Date: Tue, 18 Aug 2020 22:24:30 +0800
Subject: [PATCH 1341/1341] irq-chip/gic-v3-its: Fix crash if ITS is in a
 proximity domain without processor or memory

Note this crash is present before any of the patches in this series, but
as explained below it is highly unlikely anyone is shipping a firmware that
causes it. Tests were done using an overriden SRAT.

On ARM64, the gic-v3 driver directly parses SRAT to locate GIC Interrupt
Translation Service (ITS) Affinity Structures. This is done much later
in the boot than the parses of SRAT which identify proximity domains.

As a result, an ITS placed in a proximity domain that is not defined by
another SRAT structure will result in a NUMA node that is not completely
configured and a crash.

ITS [mem 0x202100000-0x20211ffff]
ITS@0x0000000202100000: Using ITS number 0
Unable to handle kernel paging request at virtual address 0000000000001a08
...

Call trace:
  __alloc_pages_nodemask+0xe8/0x338
  alloc_pages_node.constprop.0+0x34/0x40
  its_probe_one+0x2f8/0xb18
  gic_acpi_parse_madt_its+0x108/0x150
  acpi_table_parse_entries_array+0x17c/0x264
  acpi_table_parse_entries+0x48/0x6c
  acpi_table_parse_madt+0x30/0x3c
  its_init+0x1c4/0x644
  gic_init_bases+0x4b8/0x4ec
  gic_acpi_init+0x134/0x264
  acpi_match_madt+0x4c/0x84
  acpi_table_parse_entries_array+0x17c/0x264
  acpi_table_parse_entries+0x48/0x6c
  acpi_table_parse_madt+0x30/0x3c
  __acpi_probe_device_table+0x8c/0xe8
  irqchip_init+0x3c/0x48
  init_IRQ+0xcc/0x100
  start_kernel+0x33c/0x548

ACPI 6.3 allows any set of Affinity Structures in SRAT to define a proximity
domain.  However, as we do not see this crash, we can conclude that no
firmware is currently placing an ITS in a node that is separate from
those containing memory and / or processors.

We could modify the SRAT parsing behavior to identify the existence
of Proximity Domains unique to the ITS structures, and handle them as
a special case of a generic initiator (once support for those merges).

This patch avoids the complexity that would be needed to handle this corner
case, by not allowing the ITS entry parsing code to instantiate new NUMA
Nodes.  If one is encountered that does not already exist, then NO_NUMA_NODE
is assigned and a warning printed just as if the value had been greater than
allowed NUMA Nodes.

"SRAT: Invalid NUMA node -1 in ITS affinity"

Whilst this does not provide the full flexibility allowed by ACPI,
it does fix the problem.  We can revisit a more sophisticated solution if
needed by future platforms.

Change is simply to replace acpi_map_pxm_to_node with pxm_to_node reflecting
the fact a new mapping is not created.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/irqchip/irq-gic-v3-its.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 548de7538632a..c8ffec5d9b8ae 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -5263,7 +5263,12 @@ static int __init gic_acpi_parse_srat_its(union acpi_subtable_headers *header,
 		return -EINVAL;
 	}
 
-	node = acpi_map_pxm_to_node(its_affinity->proximity_domain);
+	/*
+	 * Note that in theory a new proximity node could be created by this
+	 * entry as it is an SRAT resource allocation structure.
+	 * We do not currently support doing so.
+	 */
+	node = pxm_to_node(its_affinity->proximity_domain);
 
 	if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) {
 		pr_err("SRAT: Invalid NUMA node %d in ITS affinity\n", node);
-- 
GitLab