perf/smmuv3: Fix hotplug callback leak in arm_smmu_pmu_init()
authorShang XiaoJing <shangxiaojing@huawei.com>
Tue, 15 Nov 2022 11:55:40 +0000 (19:55 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sat, 31 Dec 2022 12:31:51 +0000 (13:31 +0100)
commit582babe17ea878ec1d76f30e03f3a6ce6e30eb91
tree2d7457661f74548b34720393347fd542737e6105
parentadf7c3bbcc819db6e95b6a61c9822230f0ef4778
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>
drivers/perf/arm_smmuv3_pmu.c