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[v2,37/92] iio: adc: ti-ads8344: Fix alignment for DMA safety

Message ID 20220508175712.647246-38-jic23@kernel.org (mailing list archive)
State Accepted
Headers show
Series IIO: Fix alignment of buffers for DMA | expand

Commit Message

Jonathan Cameron May 8, 2022, 5:56 p.m. UTC
From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

____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: 8dd2d7c0fed7 ("iio: adc: Add driver for the TI ADS8344 A/DC chips")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
 drivers/iio/adc/ti-ads8344.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/iio/adc/ti-ads8344.c b/drivers/iio/adc/ti-ads8344.c
index c96d2a9ba924..bbd85cb47f81 100644
--- a/drivers/iio/adc/ti-ads8344.c
+++ b/drivers/iio/adc/ti-ads8344.c
@@ -28,7 +28,7 @@  struct ads8344 {
 	struct mutex lock;
-	u8 tx_buf ____cacheline_aligned;
+	u8 tx_buf __aligned(IIO_DMA_MINALIGN);
 	u8 rx_buf[3];