[PATCH 5.19 0662/1157] iio: adc: ti-adc161s626: Fix alignment for DMA safety

Greg Kroah-Hartman
2022-08-16T00:14:52Z

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

[ Upstream commit 3a828f204a110dc9f253c4cf3c1103d00a0681da ]

____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: 4d671b71beef ("iio: adc: ti-adc161s626: add support for TI 1-channel differential ADCs")
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Matt Ranostay <mranostay@gmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220508175712.647246-34-jic23@kernel.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iio/adc/ti-adc161s626.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ti-adc161s626.c b/drivers/iio/adc/ti-adc161s626.c
index 75ca7f1c8726..b789891dcf49 100644
--- a/drivers/iio/adc/ti-adc161s626.c
+++ b/drivers/iio/adc/ti-adc161s626.c
@@ -71,7 +71,7 @@ struct ti_adc_data {
u8 read_size;
u8 shift;

- u8 buffer[16] ____cacheline_aligned;
+ u8 buffer[16] __aligned(IIO_DMA_MINALIGN);
};

static int ti_adc_read_measurement(struct ti_adc_data *data,
--
2.35.1