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bus: arm-ccn: Handle correctly no-more-cpus case

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When migrating events the driver picks another cpu using
cpumask_any_but() function, which returns value >= nr_cpu_ids
when there is none available, not a negative value as the code
assumed. Fixed now.

Reported-by: Dan Carpenter <[email protected]>
Signed-off-by: Pawel Moll <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
This commit is contained in:
Pawel Moll 2015-10-15 14:32:45 +01:00 • committed by Arnd Bergmann
commit b20519fd50
1 changed files with 1 additions and 1 deletions
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2
drivers/bus/arm-ccn.c
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@ -1184,7 +1184,7 @@ static int arm_ccn_pmu_cpu_notifier(struct notifier_block *nb,
if (!cpumask_test_and_clear_cpu(cpu, &dt->cpu))
break;
target = cpumask_any_but(cpu_online_mask, cpu);
if (target < 0)
if (target >= nr_cpu_ids)
break;
perf_pmu_migrate_context(&dt->pmu, cpu, target);
cpumask_set_cpu(target, &dt->cpu);