ARM: 8351/1: perf: don't warn about missing interrupt-affinity property for PPIs

PPIs are affine by nature, so the interrupt-affinity property is not
used and therefore we shouldn't print a warning in its absence.

Reported-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 6 insertions, 1 deletions

diff --git a/arch/arm/kernel/perf_event_cpu.c b/arch/arm/kernel/perf_event_cpu.c
index 91c7ba182dcd..becf7ad6eddc 100644
--- a/arch/arm/kernel/perf_event_cpu.c
+++ b/arch/arm/kernel/perf_event_cpu.c
@@ -303,12 +303,17 @@ static int probe_current_pmu(struct arm_pmu *pmu)
 
 static int of_pmu_irq_cfg(struct platform_device *pdev)
 {
-        int i;
+        int i, irq;
         int *irqs = kcalloc(pdev->num_resources, sizeof(*irqs), GFP_KERNEL);
 
         if (!irqs)
                 return -ENOMEM;
 
+        /* Don't bother with PPIs; they're already affine */
+        irq = platform_get_irq(pdev, 0);
+        if (irq >= 0 && irq_is_percpu(irq))
+                return 0;
+
         for (i = 0; i < pdev->num_resources; ++i) {
                 struct device_node *dn;
                 int cpu;