iio: gyro: adis16080: 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 tag is inaccurate but unlikely anyone will backport this
beyond that point so I haven't chased the history futher than 2013.

Fixes: 3c80372dae17 ("staging:iio:adis16080: be16 cleanups")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-73-jic23@kernel.org

diff --git a/drivers/iio/gyro/adis16080.c b/drivers/iio/gyro/adis16080.c
index acef59d..14b3abf 100644 (file)
--- a/drivers/iio/gyro/adis16080.c
+++ b/drivers/iio/gyro/adis16080.c
@@ -45,7 +45,7 @@ struct adis16080_state {
        const struct adis16080_chip_info *info;
        struct mutex                    lock;
 
-       __be16 buf ____cacheline_aligned;
+       __be16 buf __aligned(IIO_DMA_MINALIGN);
 };
 
 static int adis16080_read_sample(struct iio_dev *indio_dev,