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| author | Will Deacon <will@kernel.org> | 2019-07-29 11:43:48 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-06 18:29:41 +0200 |
| commit | 9224305cc02b5012496f530e6468a3e06a7f6618 (patch) | |
| tree | 85827dc088bc69b6f804009ea326d8d57adacbb6 | |
| parent | 0a87819292e88db7717a5d52f268a47563c53f19 (diff) | |
| download | linux-9224305cc02b5012496f530e6468a3e06a7f6618.tar.gz linux-9224305cc02b5012496f530e6468a3e06a7f6618.tar.bz2 linux-9224305cc02b5012496f530e6468a3e06a7f6618.zip | |
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: da4e4f18afe0f372 ("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>
| -rw-r--r-- | drivers/perf/arm_pmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c index af82edc7fa5c..9b899af86cd5 100644 --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -804,8 +804,8 @@ 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: |