From 0f17380c1aae80fe0f2fa495cb627ba750b693de Mon Sep 17 00:00:00 2001 From: Andrzej Hajda Date: Tue, 23 Feb 2016 10:49:44 +0000 Subject: [PATCH] arm-cci: fix handling cpumask_any_but return value 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 Signed-off-by: Andrzej Hajda Acked-by: Will Deacon Signed-off-by: Suzuki K Poulose Signed-off-by: Will Deacon --- drivers/bus/arm-cci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c index ee47e6be9ab9..5fb1c06e0020 100644 --- a/drivers/bus/arm-cci.c +++ b/drivers/bus/arm-cci.c @@ -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 -- 2.20.1