bus: arm-ccn: Handle correctly no-more-cpus case
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 <dan.carpenter@oracle.com> Signed-off-by: Pawel Moll <pawel.moll@arm.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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@ -1184,7 +1184,7 @@ static int arm_ccn_pmu_cpu_notifier(struct notifier_block *nb,
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if (!cpumask_test_and_clear_cpu(cpu, &dt->cpu))
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break;
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target = cpumask_any_but(cpu_online_mask, cpu);
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if (target < 0)
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if (target >= nr_cpu_ids)
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break;
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perf_pmu_migrate_context(&dt->pmu, cpu, target);
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cpumask_set_cpu(target, &dt->cpu);
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