Commit b20519fd authored Oct 15, 2015 by Pawel Moll Committed by Arnd Bergmann Oct 15, 2015

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>

parent f9e5ca86

drivers/bus/arm-ccn.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);