drivers/perf: arm_pmu: Fix failure path in PM notifier
commit 0d7fd70f26039bd4b33444ca47f0e69ce3ae0354 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>
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parent
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@ -730,8 +730,8 @@ static int cpu_pm_pmu_notify(struct notifier_block *b, unsigned long cmd,
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cpu_pm_pmu_setup(armpmu, cmd);
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break;
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case CPU_PM_EXIT:
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cpu_pm_pmu_setup(armpmu, cmd);
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case CPU_PM_ENTER_FAILED:
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cpu_pm_pmu_setup(armpmu, cmd);
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armpmu->start(armpmu);
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break;
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default:
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