iio: dac: ad5421: Fix alignment for DMA safety

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[ Upstream commit d2b240d3d3 ]

____cacheline_aligned is an insufficient guarantee for non-coherent DMA
on platforms with 128 byte cachelines above L1.  Switch to the updated
IIO_DMA_MINALIGN definition.

Update the comment to include 'may'.

Fixes: 5691b23489 ("staging:iio:dac: Add AD5421 driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-46-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Jonathan Cameron 2022-05-08 18:56:25 +01:00 • committed by Greg Kroah-Hartman

parent 9f7a41a64a

commit a0bc019a08

1 changed files with 2 additions and 2 deletions

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drivers/iio/dac/ad5421.c

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