iio: adc: ad7923: Fix alignment for DMA safety

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[ Upstream commit 908af45d70 ]

____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'.

Note that some other fixes have applied to this line of code
that may complicate automated backporting.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Fixes: 0eac259db2 ("IIO ADC support for AD7923")
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-19-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Jonathan Cameron 2022-05-08 18:55:58 +01:00 • committed by Greg Kroah-Hartman

parent c97a60f0cc

commit a221cace03

1 changed files with 2 additions and 2 deletions

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drivers/iio/adc/ad7923.c

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