[PATCH 1/4] ARM: perf: don't warn about missing interrupt-affinity property for PPIs

Mark Rutland
2015-04-23T14:01:00Z

On Thu, Apr 23, 2015 at 02:50:30PM +0100, Will Deacon wrote:
> 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>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> ---
> arch/arm/kernel/perf_event_cpu.c | 7 ++++++-
> 1 file changed, 6 insertions(+), 1 deletion(-)
>
> 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;

Is 0 still a valid IRQ on any ARM platforms?

Otherwise, looks fine to me.

Acked-by: Mark Rutland <mark.rutland@arm.com>

Mark