[PATCH 5.18 0615/1095] iio: adc: ti-adc12138: Fix alignment for DMA safety

Greg Kroah-Hartman
2022-08-15T21:39:02Z

From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

[ Upstream commit 76890c3bce6003caf53b283c49a210280cb8ea33 ]

____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: 50a6edb1b6e0 ("iio: adc: add ADC12130/ADC12132/ADC12138 ADC driver")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Akinobu Mita <akinobu.mita@gmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-32-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iio/adc/ti-adc12138.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ti-adc12138.c b/drivers/iio/adc/ti-adc12138.c
index 59d75d09604f..c0a72d72f3a9 100644
--- a/drivers/iio/adc/ti-adc12138.c
+++ b/drivers/iio/adc/ti-adc12138.c
@@ -55,7 +55,7 @@ struct adc12138 {
*/
__be16 data[20] __aligned(8);

- u8 tx_buf[2] ____cacheline_aligned;
+ u8 tx_buf[2] __aligned(IIO_DMA_MINALIGN);
u8 rx_buf[2];
};

--
2.35.1