From: Will Deacon <will.deacon@arm.com>
Date: Wed, 4 Jul 2018 10:50:50 +0000 (+0100)
Subject: drivers/perf: Initialise return value in armpmu_request_irqs()
X-Git-Tag: v4.19~379^2~11^2~10
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=59b62e7ad0874681dc4f84cac90cc991dc265809;p=platform%2Fkernel%2Flinux-rpi.git

drivers/perf: Initialise return value in armpmu_request_irqs()

If a PMU doesn't have any IRQs, we should return 0 from
armpmu_request_irqs(), rather than uninitialised stack.

Signed-off-by: Will Deacon <will.deacon@arm.com>
---

diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c
index 971ff33..96075ce 100644
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -160,7 +160,7 @@ static int pmu_parse_irqs(struct arm_pmu *pmu)
 static int armpmu_request_irqs(struct arm_pmu *armpmu)
 {
 	struct pmu_hw_events __percpu *hw_events = armpmu->hw_events;
-	int cpu, err;
+	int cpu, err = 0;
 
 	for_each_cpu(cpu, &armpmu->supported_cpus) {
 		int irq = per_cpu(hw_events->irq, cpu);