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| author | Tudor Ambarus <tudor.ambarus@microchip.com> | 2021-11-25 11:00:17 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 08:46:14 +0100 |
| commit | 08fbd3e9a0a96f0c2e95c83b5b5d6e00745439b4 (patch) | |
| tree | 2f9d2f0c0cb8de5699fe8a4f4c8df25056c8cff2 /include/linux/avtimer_kernel.h | |
| parent | 33e17a61ddaadf555e219f7c4d4a7c1c4e0355f8 (diff) | |
tty: serial: atmel: Check return code of dmaengine_submit()
[ Upstream commit 1e67bd2b8cb90b66e89562598e9c2046246832d3 ]
The tx_submit() method of struct dma_async_tx_descriptor is entitled
to do sanity checks and return errors if encountered. It's not the
case for the DMA controller drivers that this client is using
(at_h/xdmac), because they currently don't do sanity checks and always
return a positive cookie at tx_submit() method. In case the controller
drivers will implement sanity checks and return errors, print a message
so that the client will be informed that something went wrong at
tx_submit() level.
Fixes: 08f738be88bb ("serial: at91: add tx dma support")
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Richard Genoud <richard.genoud@gmail.com>
Link: https://lore.kernel.org/r/20211125090028.786832-3-tudor.ambarus@microchip.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux/avtimer_kernel.h')
0 files changed, 0 insertions, 0 deletions