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arm-cci: fix handling cpumask_any_but return value

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cpumask_any_but returns value >= nr_cpu_ids if there are no more CPUs.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2038576

Acked-by: Olof Johansson <[email protected]>
Signed-off-by: Andrzej Hajda <[email protected]>
Acked-by: Will Deacon <[email protected]>
Signed-off-by: Suzuki K Poulose <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
This commit is contained in:
Andrzej Hajda 2016-02-23 10:49:44 +00:00 • committed by Will Deacon
commit 0f17380c1a
1 changed files with 1 additions and 1 deletions
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2
drivers/bus/arm-cci.c
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@ -1270,7 +1270,7 @@ static int cci_pmu_cpu_notifier(struct notifier_block *self,
if (!cpumask_test_and_clear_cpu(cpu, &cci_pmu->cpus))
break;
target = cpumask_any_but(cpu_online_mask, cpu);
if (target < 0) // UP, last CPU
if (target >= nr_cpu_ids) // UP, last CPU
break;
/*
* TODO: migrate context once core races on event->ctx have