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iio: proximity: as3935: Fix alignment for DMA safety

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[ Upstream commit 2386c0f8c5b740873a4b9126c3706601b127fe22 ]

____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.

Fixes: 24ddb0e4bba4 ("iio: Add AS3935 lightning sensor support")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Matt Ranostay <mranostay@gmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-87-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2022-05-08 18:57:06 +01:00 committed by Greg Kroah-Hartman
parent 5179a57372
commit 59ee01f392
1 changed files with 1 additions and 1 deletions
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drivers/iio/proximity/as3935.c
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@ -65,7 +65,7 @@ struct as3935_state {
u8 chan;
s64 timestamp __aligned(8);
} scan;
u8 buf[2] ____cacheline_aligned;
u8 buf[2] __aligned(IIO_DMA_MINALIGN);
};
static const struct iio_chan_spec as3935_channels[] = {