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authorAmelie Delaunay <amelie.delaunay@foss.st.com>2024-11-05 17:02:42 +0300
committerMark Brown <broonie@kernel.org>2024-11-05 19:26:03 +0300
commit9bb4af400c386374ab1047df44c508512c08c31f (patch)
tree7b11533c9e1c9872d8f509afbdfbcdb096df95a8 /tools/perf/scripts/python/flamegraph.py
parent08a3b241adfd90361c16c3e92f5275b816a73f04 (diff)
downloadlinux-9bb4af400c386374ab1047df44c508512c08c31f.tar.xz
ASoC: stm32: spdifrx: fix dma channel release in stm32_spdifrx_remove
In case of error when requesting ctrl_chan DMA channel, ctrl_chan is not null. So the release of the dma channel leads to the following issue: [ 4.879000] st,stm32-spdifrx 500d0000.audio-controller: dma_request_slave_channel error -19 [ 4.888975] Unable to handle kernel NULL pointer dereference at virtual address 000000000000003d [...] [ 5.096577] Call trace: [ 5.099099] dma_release_channel+0x24/0x100 [ 5.103235] stm32_spdifrx_remove+0x24/0x60 [snd_soc_stm32_spdifrx] [ 5.109494] stm32_spdifrx_probe+0x320/0x4c4 [snd_soc_stm32_spdifrx] To avoid this issue, release channel only if the pointer is valid. Fixes: 794df9448edb ("ASoC: stm32: spdifrx: manage rebind issue") Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com> Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> Link: https://patch.msgid.link/20241105140242.527279-1-olivier.moysan@foss.st.com Signed-off-by: Mark Brown <broonie@kernel.org>
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