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bus: arm-ccn: Fix irq affinity setting on CPU migration

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When PMU context is migrating between CPUs, interrupt affinity is set as
well. Only this should not happen when the CCN interrupt is not being
used at all (the driver is using a hrtimer tick instead).

Fixed now.

Cc: <stable@vger.kernel.org> # 4.2+
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Pawel Moll 2015-10-15 14:32:46 +01:00 committed by Arnd Bergmann
parent b20519fd50
commit a0bcbe969f
1 changed files with 2 additions and 1 deletions
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3
drivers/bus/arm-ccn.c
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@ -1188,7 +1188,8 @@ static int arm_ccn_pmu_cpu_notifier(struct notifier_block *nb,
break;
perf_pmu_migrate_context(&dt->pmu, cpu, target);
cpumask_set_cpu(target, &dt->cpu);
WARN_ON(irq_set_affinity(ccn->irq, &dt->cpu) != 0);
if (ccn->irq)
WARN_ON(irq_set_affinity(ccn->irq, &dt->cpu) != 0);
default:
break;
}