diff options
| author | Xiyu Yang <xiyuyang19@fudan.edu.cn> | 2020-05-25 17:12:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-06-25 16:33:01 +0300 |
| commit | ad936c11d4574a52241bd56706a150375b970f42 (patch) | |
| tree | 00ad3b3d25aa9dfed03042d417f3443febb4247c /drivers/vfio | |
| parent | b74933661c68cbc9cead48817dd07bb8cdc579d0 (diff) | |
| download | linux-ad936c11d4574a52241bd56706a150375b970f42.tar.xz | |
ASoC: fsl_asrc_dma: Fix dma_chan leak when config DMA channel failed
[ Upstream commit 36124fb19f1ae68a500cd76a76d40c6e81bee346 ]
fsl_asrc_dma_hw_params() invokes dma_request_channel() or
fsl_asrc_get_dma_channel(), which returns a reference of the specified
dma_chan object to "pair->dma_chan[dir]" with increased refcnt.
The reference counting issue happens in one exception handling path of
fsl_asrc_dma_hw_params(). When config DMA channel failed for Back-End,
the function forgets to decrease the refcnt increased by
dma_request_channel() or fsl_asrc_get_dma_channel(), causing a refcnt
leak.
Fix this issue by calling dma_release_channel() when config DMA channel
failed.
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Link: https://lore.kernel.org/r/1590415966-52416-1-git-send-email-xiyuyang19@fudan.edu.cn
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/vfio')
0 files changed, 0 insertions, 0 deletions