iio: adc: ltc2496: Fix alignment for DMA safety

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[ Upstream commit 1673b7ca2d ]

____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: e4c5c4dfaa ("iio: adc: new driver to support Linear technology's ltc2496")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-22-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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

parent 3ad6dfff2c

commit 0bd54a894e

1 changed files with 2 additions and 2 deletions

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drivers/iio/adc/ltc2496.c

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