iio: adc: ad7887: Fix alignment for DMA safety

Browse source

[ Upstream commit b330ea6bc5 ]

____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 tag is clearly not where this was introduced but it is very unlikely
anyone will back port it past that point.

Fixes: 65dd3d3d7a ("staging:iio:ad7887: Squash everything into one file")
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/20220508175712.647246-18-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

This commit is contained in:

Jonathan Cameron 2022-05-08 18:55:57 +01:00 • committed by Greg Kroah-Hartman

parent c02e8accba

commit c97a60f0cc

1 changed files with 2 additions and 3 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

5

drivers/iio/adc/ad7887.c

View file