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iio: potentiometer: max5481: Fix alignment for DMA safety

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____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: df1fd2de11 ("iio: max5481: Add support for Maxim digital potentiometers")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-83-jic23@kernel.org
This commit is contained in:
Jonathan Cameron 2022-05-08 18:57:02 +01:00
parent da80365253
commit ec1ac1c0e7
1 changed files with 1 additions and 1 deletions
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drivers/iio/potentiometer/max5481.c
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@ -44,7 +44,7 @@ static const struct max5481_cfg max5481_cfg[] = {
struct max5481_data {
struct spi_device *spi;
const struct max5481_cfg *cfg;
u8 msg[3] ____cacheline_aligned;
u8 msg[3] __aligned(IIO_DMA_MINALIGN);
};
#define MAX5481_CHANNEL { \