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iio: adc: max1241: Fix alignment for DMA safety

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[ Upstream commit 9d7019e43ee67a48cef63f8f23f002233064d390 ]

____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: 8a80a71d9020 ("iio: adc: Add MAX1241 driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Alexandru Lazar <alazar@startmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-27-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jonathan Cameron 2022-05-08 18:56:06 +01:00 committed by Greg Kroah-Hartman
parent 7890446278
commit b4f25b4a89
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/max1241.c
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@ -26,7 +26,7 @@ struct max1241 {
struct regulator *vref;
struct gpio_desc *shutdown;
__be16 data ____cacheline_aligned;
__be16 data __aligned(IIO_DMA_MINALIGN);
};
static const struct iio_chan_spec max1241_channels[] = {