From: Yuan Can <yuancan@xxxxxxxxxx>
[ Upstream commit facafab7611f7b872c6b9eeaff53461ef11f482e ]
dsu_pmu_init() won't remove the callback added by cpuhp_setup_state_multi()
when platform_driver_register() failed. Remove the callback by
cpuhp_remove_multi_state() in fail path.
Similar to the handling of arm_ccn_init() in commit 26242b330093 ("bus:
arm-ccn: Prevent hotplug callback leak")
Fixes: 7520fa99246d ("perf: ARM DynamIQ Shared Unit PMU support")
Signed-off-by: Yuan Can <yuancan@xxxxxxxxxx>
Acked-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Link: https://lore.kernel.org/r/20221115070207.32634-2-yuancan@xxxxxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/perf/arm_dsu_pmu.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/perf/arm_dsu_pmu.c b/drivers/perf/arm_dsu_pmu.c
index a36698a90d2f..54b8ba032c78 100644
--- a/drivers/perf/arm_dsu_pmu.c
+++ b/drivers/perf/arm_dsu_pmu.c
@@ -858,7 +858,11 @@ static int __init dsu_pmu_init(void)
if (ret < 0)
return ret;
dsu_pmu_cpuhp_state = ret;
- return platform_driver_register(&dsu_pmu_driver);
+ ret = platform_driver_register(&dsu_pmu_driver);
+ if (ret)
+ cpuhp_remove_multi_state(dsu_pmu_cpuhp_state);
+
+ return ret;
}
static void __exit dsu_pmu_exit(void)
--
2.35.1
