]> git.baikalelectronics.ru Git - kernel.git/commit
dmaengine: mediatek:Fix PM usage reference leak of mtk_uart_apdma_alloc_chan_resources
authorzhangqilong <zhangqilong3@huawei.com>
Sat, 19 Mar 2022 02:21:42 +0000 (10:21 +0800)
committerVinod Koul <vkoul@kernel.org>
Tue, 12 Apr 2022 11:15:42 +0000 (16:45 +0530)
commit5e1b5067968e99d3b15206561716451bacdef6b4
treeabd0f234d5df0937fe287fb5fefe4254936929e6
parenta21f568389072d9c2ee7b4622ca5da672ded913a
dmaengine: mediatek:Fix PM usage reference leak of mtk_uart_apdma_alloc_chan_resources

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:985edc7678771 ("dmaengine: mediatek: Add MediaTek UART APDMA support")
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20220319022142.142709-1-zhangqilong3@huawei.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
drivers/dma/mediatek/mtk-uart-apdma.c