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

wildea01 · Russell King · commit 338d9dd3e2ae · 2015-05-03T23:23:44.000+01:00
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 &lt;maxime.ripard@free-electrons.com&gt;
Reviewed-by: Maxime Ripard &lt;maxime.ripard@free-electrons.com&gt;
Signed-off-by: Will Deacon &lt;will.deacon@arm.com&gt;
Signed-off-by: Russell King &lt;rmk+kernel@arm.linux.org.uk&gt;
diff --git 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;
