iio: adc: ti-adc0832: 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: efc945fb729c ("iio: adc: add support for ADC0831/ADC0832/ADC0834/ADC0838 chips")
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/20220508175712.647246-29-jic23@kernel.org

diff --git a/drivers/iio/adc/ti-adc0832.c b/drivers/iio/adc/ti-adc0832.c
index fb5e72600b9680790253d0e230c79ccbb7089e61..b11ce555ba3b9c21d1926bfab7660066c37dbcab 100644 (file)
--- a/drivers/iio/adc/ti-adc0832.c
+++ b/drivers/iio/adc/ti-adc0832.c
@@ -36,7 +36,7 @@ struct adc0832 {
         */
        u8 data[24] __aligned(8);
 
-       u8 tx_buf[2] ____cacheline_aligned;
+       u8 tx_buf[2] __aligned(IIO_DMA_MINALIGN);
        u8 rx_buf[2];
 };