[PATCH 5.19 0639/1157] iio: adc: ad7280a: Fix alignment for DMA safety

[Greg Kroah-Hartman]

From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>

[ Upstream commit 4e2008429588b857bbc13d048b67b931a8d84816 ]

____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: 003f1d48de52 ("staging:iio:adc:ad7280a: Split buff[2] into tx and rx parts")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Acked-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220508175712.647246-11-jic23@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/iio/adc/ad7280a.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ad7280a.c b/drivers/iio/adc/ad7280a.c
index 3bdf3d9422f2..d4a4e15c8244 100644
--- a/drivers/iio/adc/ad7280a.c
+++ b/drivers/iio/adc/ad7280a.c
@@ -183,7 +183,7 @@ struct ad7280_state {
 	unsigned char			cb_mask[AD7280A_MAX_CHAIN];
 	struct mutex			lock; /* protect sensor state */
 
-	__be32				tx ____cacheline_aligned;
+	__be32				tx __aligned(IIO_DMA_MINALIGN);
 	__be32				rx;
 };
 
-- 
2.35.1