diff options
author | Shang XiaoJing <shangxiaojing@huawei.com> | 2022-11-15 14:55:40 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-14 12:15:12 +0300 |
commit | 359286f886feef38536eaa7e673dc3440f03b0a1 (patch) | |
tree | 55c02160e03bb111ff0d1983c42e32ccacfff206 /drivers/perf | |
parent | 9afac95b87fa1816ac3362168a7d77a280380594 (diff) | |
download | linux-359286f886feef38536eaa7e673dc3440f03b0a1.tar.xz |
perf/smmuv3: Fix hotplug callback leak in arm_smmu_pmu_init()
[ Upstream commit 6f2d566b46436a50a80d6445e82879686b89588c ]
arm_smmu_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: 7d839b4b9e00 ("perf/smmuv3: Add arm64 smmuv3 pmu driver")
Signed-off-by: Shang XiaoJing <shangxiaojing@huawei.com>
Reviewed-by: Punit Agrawal <punit.agrawal@bytedance.com>
Link: https://lore.kernel.org/r/20221115115540.6245-3-shangxiaojing@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/perf')
-rw-r--r-- | drivers/perf/arm_smmuv3_pmu.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c index afa8efbdad8f..f5a33dbe7acb 100644 --- a/drivers/perf/arm_smmuv3_pmu.c +++ b/drivers/perf/arm_smmuv3_pmu.c @@ -870,6 +870,8 @@ static struct platform_driver smmu_pmu_driver = { static int __init arm_smmu_pmu_init(void) { + int ret; + cpuhp_state_num = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "perf/arm/pmcg:online", NULL, @@ -877,7 +879,11 @@ static int __init arm_smmu_pmu_init(void) if (cpuhp_state_num < 0) return cpuhp_state_num; - return platform_driver_register(&smmu_pmu_driver); + ret = platform_driver_register(&smmu_pmu_driver); + if (ret) + cpuhp_remove_multi_state(cpuhp_state_num); + + return ret; } module_init(arm_smmu_pmu_init); |