From 6dcacc1a08d8adb67b4a3d6b59e12ced5343848f Mon Sep 17 00:00:00 2001
From: Brendan Jackman <brendan.jackman@arm.com>
Date: Tue, 21 Mar 2017 16:24:41 +0000
Subject: [PATCH] libs/utils/energy: Slightly improve error for missing hwmon
 channel

---
 libs/utils/energy.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libs/utils/energy.py b/libs/utils/energy.py
index 57fbde74f..9e78f45cf 100644
--- a/libs/utils/energy.py
+++ b/libs/utils/energy.py
@@ -195,6 +195,10 @@ class HWMon(EnergyMeter):
         # Reformat data for output generation
         clusters_nrg = {}
         for channel in self._channels:
+            if channel not in nrg:
+                raise RuntimeError('hwmon channel "{}" not available. '
+                                   'Selected channels: {}'.format(
+                                       channel, nrg.keys()))
             label = self._channels[channel]
             nrg_total = nrg[label]['total']
             self._log.debug('Energy [%16s]: %.6f', label, nrg_total)
-- 
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