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arm64: perf: fix unassigned cpu_pmu->plat_device when probing PMU PPIs 

Commit d795ef9aa8 ("arm64: perf: don't warn about missing
interrupt-affinity property for PPIs") added a check for PPIs so that
we avoid parsing the interrupt-affinity property for these naturally
affine interrupts.

Unfortunately, this check can trigger an early (successful) return and
we will not assign the value of cpu_pmu->plat_device. This patch fixes
the issue.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
steinar/wifi_calib_4_9_kernel
Shannon Zhao 2015-06-29 09:02:40 +01:00 committed by Catalin Marinas
parent 18a11b5e79
commit b265da5a45
1 changed files with 2 additions and 1 deletions
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3
arch/arm64/kernel/perf_event.c
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@ -1318,7 +1318,7 @@ static int armpmu_device_probe(struct platform_device *pdev)
/* Don't bother with PPIs; they're already affine */
irq = platform_get_irq(pdev, 0);
if (irq >= 0 && irq_is_percpu(irq))
return 0;
goto out;
irqs = kcalloc(pdev->num_resources, sizeof(*irqs), GFP_KERNEL);
if (!irqs)
@ -1356,6 +1356,7 @@ static int armpmu_device_probe(struct platform_device *pdev)
else
kfree(irqs);
out:
cpu_pmu->plat_device = pdev;
return 0;
}