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[v2,28/92] iio: adc: ti-adc0832: Fix alignment for DMA safety

Message ID 20220508175712.647246-29-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: 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>
---
 drivers/iio/adc/ti-adc0832.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/drivers/iio/adc/ti-adc0832.c b/drivers/iio/adc/ti-adc0832.c
index fb5e72600b96..b11ce555ba3b 100644
--- 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];
 };