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iio: adc: ti-adc12138: 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: 50a6edb1b6 ("iio: adc: add ADC12130/ADC12132/ADC12138 ADC driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-32-jic23@kernel.org
This commit is contained in:
Jonathan Cameron 2022-05-08 18:56:11 +01:00
parent 6909fe1788
commit 76890c3bce
1 changed files with 1 additions and 1 deletions
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2
drivers/iio/adc/ti-adc12138.c
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@ -55,7 +55,7 @@ struct adc12138 {
*/
__be16 data[20] __aligned(8);
u8 tx_buf[2] ____cacheline_aligned;
u8 tx_buf[2] __aligned(IIO_DMA_MINALIGN);
u8 rx_buf[2];
};