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 (file)
--- 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);