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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>
This commit is contained in:
Mark Salter 2016-06-07 11:32:21 -05:00 committed by Will Deacon
parent bbb1681ee3
commit f7a6c1492a
1 changed files with 1 additions and 1 deletions
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2
drivers/perf/arm_pmu.c
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@ -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) {