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drivers: perf: marvell_cn10k: Fix hotplug callback leak in tad_pmu_init()

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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 26242b3300 ("bus:
arm-ccn: Prevent hotplug callback leak")

Fixes: 036a7584be ("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>
This commit is contained in:
Yuan Can 2022-11-15 07:02:07 +00:00 committed by Will Deacon
parent facafab761
commit 973ae93d80
1 changed files with 5 additions and 1 deletions
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6
drivers/perf/marvell_cn10k_tad_pmu.c
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@ -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)