perf: arm_cspmu: Set irq affinitiy only if overflow interrupt is used

Don't try to set irq affinity if PMU doesn't have an overflow interrupt.

Fixes: e37dfd65731d ("perf: arm_cspmu: Add support for ARM CoreSight PMU driver")
Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Link: https://lore.kernel.org/r/20230608203742.3503486-1-ilkka@os.amperecomputing.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c
index a3f1c410b4173d44137c6906b128711a871e947e..d0572162f0632db097f227649fd7bacd0fd8e43b 100644 (file)
--- a/drivers/perf/arm_cspmu/arm_cspmu.c
+++ b/drivers/perf/arm_cspmu/arm_cspmu.c
@@ -1232,7 +1232,8 @@ static struct platform_driver arm_cspmu_driver = {
 static void arm_cspmu_set_active_cpu(int cpu, struct arm_cspmu *cspmu)
 {
        cpumask_set_cpu(cpu, &cspmu->active_cpu);
-       WARN_ON(irq_set_affinity(cspmu->irq, &cspmu->active_cpu));
+       if (cspmu->irq)
+               WARN_ON(irq_set_affinity(cspmu->irq, &cspmu->active_cpu));
 }
 
 static int arm_cspmu_cpu_online(unsigned int cpu, struct hlist_node *node)