iio: adc: ad7606: Fix alignment for DMA safety

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[ Upstream commit 6268c6eebb ]

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

Update the comment to reflect the fact DMA safety 'may' require
separate cachelines.

Fixes: 7989b4bb23 ("iio: adc: ad7616: Add support for AD7616 ADC")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-15-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Jonathan Cameron 2022-05-08 18:55:54 +01:00 • committed by Greg Kroah-Hartman

parent 50d616f228

commit b724a7797d

1 changed files with 2 additions and 2 deletions

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drivers/iio/adc/ad7606.h

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