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drivers/perf: arm_pmu: Fix failure path in PM notifier

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commit 0d7fd70f26 upstream.

Handling of the CPU_PM_ENTER_FAILED transition in the Arm PMU PM
notifier code incorrectly skips restoration of the counters. Fix the
logic so that CPU_PM_ENTER_FAILED follows the same path as CPU_PM_EXIT.

Cc: <stable@vger.kernel.org>
Fixes: da4e4f18af ("drivers/perf: arm_pmu: implement CPU_PM notifier")
Reported-by: Anders Roxell <anders.roxell@linaro.org>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Will Deacon
2019-07-29 11:43:48 +01:00
committed by Greg Kroah-Hartman
parent 45842c3b55
commit 1cc390b313
1 changed files with 1 additions and 1 deletions
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2
drivers/perf/arm_pmu.c
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@@ -751,8 +751,8 @@ static int cpu_pm_pmu_notify(struct notifier_block *b, unsigned long cmd,
cpu_pm_pmu_setup(armpmu, cmd);
break;
case CPU_PM_EXIT:
cpu_pm_pmu_setup(armpmu, cmd);
case CPU_PM_ENTER_FAILED:
cpu_pm_pmu_setup(armpmu, cmd);
armpmu->start(armpmu);
break;
default: