iio: dac: ltc2688: Fix alignment for DMA safety

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[ Upstream commit 2030708377 ]

____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: 832cb9eeb9 ("iio: dac: add support for ltc2688")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-60-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Jonathan Cameron 2022-05-08 18:56:39 +01:00 • committed by Greg Kroah-Hartman

parent 8e23928dcb

commit 21cd3bb91b

1 changed files with 2 additions and 2 deletions

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drivers/iio/dac/ltc2688.c

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