From: Ilkka Koskinen ilkka@os.amperecomputing.com
[ Upstream commit 225d757012e0afa673d8c862e6fb39ed2f429b4d ]
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.... Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/perf/arm_cspmu/arm_cspmu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c index a3f1c410b4173..d0572162f0632 100644 --- 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)