dmaengine: stm32-mdma: abort resume if no ongoing transfer

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commit 81337b9a72 upstream.

chan->desc can be null, if transfer is terminated when resume is called,
leading to a NULL pointer when retrieving the hwdesc.
To avoid this case, check that chan->desc is not null and channel is
disabled (transfer previously paused or terminated).

Fixes: a4ffb13c89 ("dmaengine: Add STM32 MDMA driver")
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20231004163531.2864160-1-amelie.delaunay@foss.st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Amelie Delaunay 2023-10-04 18:35:28 +02:00 • committed by Greg Kroah-Hartman

parent 0796c53424

commit 8e7dfe9c2a

1 changed files with 4 additions and 0 deletions

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drivers/dma/stm32-mdma.c

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