leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ARM: 8401/1: perf: Set affinity for PPI based PMUs

Browse Source 
For PPI based PMUs, we bail out early in of_pmu_irq_cfg() without
setting the PMU's supported_cpus bitmap. This causes the
smp_call_function_any() in armv7_probe_num_events() to fail. Set
the bitmap to be all CPUs so that we properly probe PMUs that use
PPIs.

Fixes: cc88116da0 ("arm: perf: treat PMUs as CPU affine")
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Stephen Boyd 2015-07-07 18:16:15 +01:00 committed by Russell King
parent eeedcea69e
commit 8ded1e1a92
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm/kernel/perf_event.c
View File

@ -795,8 +795,10 @@ static int of_pmu_irq_cfg(struct arm_pmu *pmu)
/* Don't bother with PPIs; they're already affine */ /* Don't bother with PPIs; they're already affine */
irq = platform_get_irq(pdev, 0); irq = platform_get_irq(pdev, 0);
if (irq >= 0 && irq_is_percpu(irq)) if (irq >= 0 && irq_is_percpu(irq)) {
cpumask_setall(&pmu->supported_cpus);
return 0; return 0;
}
irqs = kcalloc(pdev->num_resources, sizeof(*irqs), GFP_KERNEL); irqs = kcalloc(pdev->num_resources, sizeof(*irqs), GFP_KERNEL);
if (!irqs) if (!irqs)