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-rw-r--r--arch/arc/kernel/perf_event.c27
1 files changed, 18 insertions, 9 deletions
diff --git a/arch/arc/kernel/perf_event.c b/arch/arc/kernel/perf_event.c
index 79849f37e782..145722f80c9b 100644
--- a/arch/arc/kernel/perf_event.c
+++ b/arch/arc/kernel/perf_event.c
@@ -562,7 +562,7 @@ static int arc_pmu_device_probe(struct platform_device *pdev)
{
struct arc_reg_pct_build pct_bcr;
struct arc_reg_cc_build cc_bcr;
- int i, has_interrupts, irq;
+ int i, has_interrupts, irq = -1;
int counter_size; /* in bits */
union cc_name {
@@ -637,19 +637,28 @@ static int arc_pmu_device_probe(struct platform_device *pdev)
.attr_groups = arc_pmu->attr_groups,
};
- if (has_interrupts && (irq = platform_get_irq(pdev, 0) >= 0)) {
+ if (has_interrupts) {
+ irq = platform_get_irq(pdev, 0);
+ if (irq >= 0) {
+ int ret;
- arc_pmu->irq = irq;
+ arc_pmu->irq = irq;
- /* intc map function ensures irq_set_percpu_devid() called */
- request_percpu_irq(irq, arc_pmu_intr, "ARC perf counters",
- this_cpu_ptr(&arc_pmu_cpu));
+ /* intc map function ensures irq_set_percpu_devid() called */
+ ret = request_percpu_irq(irq, arc_pmu_intr, "ARC perf counters",
+ this_cpu_ptr(&arc_pmu_cpu));
+
+ if (!ret)
+ on_each_cpu(arc_cpu_pmu_irq_init, &irq, 1);
+ else
+ irq = -1;
+ }
- on_each_cpu(arc_cpu_pmu_irq_init, &irq, 1);
- } else {
- arc_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
}
+ if (irq == -1)
+ arc_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
+
/*
* perf parser doesn't really like '-' symbol in events name, so let's
* use '_' in arc pct name as it goes to kernel PMU event prefix.