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iio: adc: max1027: Fix alignment for DMA safety 

____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: fc167f6248 ("iio: add support of the max1027")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-24-jic23@kernel.org
This commit is contained in:
Jonathan Cameron 2022-05-08 18:56:03 +01:00
parent 6ebf401d55
commit e754fb7e7a
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/max1027.c
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@ -272,7 +272,7 @@ struct max1027_state {
struct mutex lock;
struct completion complete;
u8 reg ____cacheline_aligned;
u8 reg __aligned(IIO_DMA_MINALIGN);
};
static int max1027_wait_eoc(struct iio_dev *indio_dev)