[PATCH 4.9 32/42] drivers/perf: arm_pmu: Fix failure path in PM notifier

[Greg Kroah-Hartman]

From: Will Deacon <will@xxxxxxxxxx>

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@xxxxxxxxxxxxxxx>
Fixes: da4e4f18afe0f372 ("drivers/perf: arm_pmu: implement CPU_PM notifier")
Reported-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/perf/arm_pmu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -804,8 +804,8 @@ static int cpu_pm_pmu_notify(struct noti
 		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: