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| author | Yuan Can <yuancan@huawei.com> | 2022-11-15 08:02:07 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-11-15 14:45:02 +0100 |
| commit | 973ae93d80d9d262f695eb485a1902b74c4b9098 (patch) | |
| tree | 98677729b80358600a94554949efe991582b9317 /drivers/perf | |
| parent | perf: arm_dsu: Fix hotplug callback leak in dsu_pmu_init() (diff) | |
| download | linux-973ae93d80d9d262f695eb485a1902b74c4b9098.tar.xz linux-973ae93d80d9d262f695eb485a1902b74c4b9098.zip | |
drivers: perf: marvell_cn10k: Fix hotplug callback leak in tad_pmu_init()
tad_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: 036a7584bede ("drivers: perf: Add LLC-TAD perf counter support")
Signed-off-by: Yuan Can <yuancan@huawei.com>
Link: https://lore.kernel.org/r/20221115070207.32634-3-yuancan@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'drivers/perf')
| -rw-r--r-- | drivers/perf/marvell_cn10k_tad_pmu.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/perf/marvell_cn10k_tad_pmu.c b/drivers/perf/marvell_cn10k_tad_pmu.c index 69c3050a4348..a1166afb3702 100644 --- a/drivers/perf/marvell_cn10k_tad_pmu.c +++ b/drivers/perf/marvell_cn10k_tad_pmu.c @@ -408,7 +408,11 @@ static int __init tad_pmu_init(void) if (ret < 0) return ret; tad_pmu_cpuhp_state = ret; - return platform_driver_register(&tad_pmu_driver); + ret = platform_driver_register(&tad_pmu_driver); + if (ret) + cpuhp_remove_multi_state(tad_pmu_cpuhp_state); + + return ret; } static void __exit tad_pmu_exit(void) |