Commit f7a6c149 authored Jun 07, 2016 by Mark Salter Committed by Will Deacon Jun 15, 2016

arm: pmu: Fix non-devicetree probing



There is a problem in the non-devicetree PMU probing where some
probe functions may get the number of supported events through
smp_call_function_any() using the arm_pmu supported_cpus mask.
But at the time the probe function is called, the supported_cpus
mask is empty so the call fails. This patch makes sure the mask
is set before calling the init function rather than after.

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

parent bbb1681e

drivers/perf/arm_pmu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1010,8 +1010,8 @@ int arm_pmu_device_probe(struct platform_device *pdev,
		if (!ret)
		ret = init_fn(pmu);
		} else {
		ret = probe_current_pmu(pmu, probe_table);
		cpumask_setall(&pmu->supported_cpus);
		ret = probe_current_pmu(pmu, probe_table);
		}

		if (ret) {

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