Commit dfc6a02d authored by zhangqilong's avatar zhangqilong Committed by Zheng Zengkai
Browse files

dmaengine: mediatek:Fix PM usage reference leak of mtk_uart_apdma_alloc_chan_resources

stable inclusion
from stable-v5.10.113
commit f714abf28f819849d2fd93a4a8db15cff3f8798e
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5ISAH

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=f714abf28f819849d2fd93a4a8db15cff3f8798e



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[ Upstream commit 545b2baa ]

pm_runtime_get_sync will increment pm usage counter even it failed.
Forgetting to putting operation will result in reference leak here.
We fix it:
1) Replacing it with pm_runtime_resume_and_get to keep usage counter
   balanced.
2) Add putting operation before returning error.

Fixes:9135408c ("dmaengine: mediatek: Add MediaTek UART APDMA support")
Signed-off-by: default avatarZhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20220319022142.142709-1-zhangqilong3@huawei.com


Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: default avatarXie XiuQi <xiexiuqi@huawei.com>
parent 4be6d449
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