platform/x86: thinkpad_acpi: disable ACPI fan access for T495* and E560
T495, T495s, and E560 laptops have the FANG+FANW ACPI methods (therefore fang_handle and fanw_handle are not NULL) but they do not actually work, which results in a "No such device or address" error. The DSDT table code for the FANG+FANW methods doesn't seem to do anything special regarding the fan being secondary. The bug was introduced in commit 57d0557d ("platform/x86: thinkpad_acpi: Add Thinkpad Edge E531 fan support"), which added a new fan control method via the FANG+FANW ACPI methods. Add a quirk for T495, T495s, and E560 to avoid the FANG+FANW methods. Fan access and control is restored after forcing the legacy non-ACPI fan control method by setting both fang_handle and fanw_handle to NULL. Reported-by:Vlastimil Holer <vlastimil.holer@gmail.com> Fixes: 57d0557d ("platform/x86: thinkpad_acpi: Add Thinkpad Edge E531 fan support") Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219643 Cc: stable@vger.kernel.org Tested-by:
Alireza Elikahi <scr0lll0ck1s4b0v3h0m3k3y@gmail.com> Reviewed-by:
Kurt Borja <kuurtb@gmail.com> Signed-off-by:
Eduard Christian Dumitrescu <eduard.c.dumitrescu@gmail.com> Co-developed-by:
Seyediman Seyedarab <ImanDevel@gmail.com> Signed-off-by:
Seyediman Seyedarab <ImanDevel@gmail.com> Link: https://lore.kernel.org/r/20250324152442.106113-1-ImanDevel@gmail.com Reviewed-by:
Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> Signed-off-by:
Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
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