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[v2,35/92] iio: adc: ti-ads131e08: Fix alignment for DMA safety

Message ID 20220508175712.647246-36-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: d935eddd2799 ("iio: adc: Add driver for Texas Instruments ADS131E0x ADC family")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Tomislav Denis <tomislav.denis@avl.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
 drivers/iio/adc/ti-ads131e08.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/drivers/iio/adc/ti-ads131e08.c b/drivers/iio/adc/ti-ads131e08.c
index 0c2025a22575..0dd9a50a9138 100644
--- a/drivers/iio/adc/ti-ads131e08.c
+++ b/drivers/iio/adc/ti-ads131e08.c
@@ -105,7 +105,7 @@  struct ads131e08_state {
 		s64 ts __aligned(8);
 	} tmp_buf;
-	u8 tx_buf[3] ____cacheline_aligned;
+	u8 tx_buf[3] __aligned(IIO_DMA_MINALIGN);
 	 * Add extra one padding byte to be able to access the last channel
 	 * value using u32 pointer