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| H A D | stm32-usart.c | diff 2490a0ca5735714bd2ba8ba8a41fa9343b422113 Tue Aug 08 11:19:06 CDT 2023 Amelie Delaunay <amelie.delaunay@foss.st.com> serial: stm32: synchronize RX DMA channel in shutdown
In shutdown, RX DMA channel is terminated. If the DMA RX callback is
scheduled but not yet executed, while a new RX DMA transfer is started, the
callback can be executed, and then disturb the ongoing RX DMA transfer.
To avoid such a case, call dmaengine_synchronize in shutdown, after the
DMA RX channel is terminated.
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Signed-off-by: Valentin Caron <valentin.caron@foss.st.com>
Link: https://lore.kernel.org/r/20230808161906.178996-7-valentin.caron@foss.st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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