Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.19 0710/1157] iio: potentiometer: ad5272: Fix alignment for DMA safety | Date | Mon, 15 Aug 2022 20:01:06 +0200 |
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From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
[ Upstream commit da803652534271dbb4af0802bd678c759e27e6de ]
____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: 79e8a32d2aa9 ("iio: ad5272: Add support for Analog Devices digital potentiometers") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Phil Reid <preid@electromag.com.au> Acked-by: Nuno Sá <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20220508175712.647246-82-jic23@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/iio/potentiometer/ad5272.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/potentiometer/ad5272.c b/drivers/iio/potentiometer/ad5272.c index d8cbd170262f..ed5fc0b50fe9 100644 --- a/drivers/iio/potentiometer/ad5272.c +++ b/drivers/iio/potentiometer/ad5272.c @@ -50,7 +50,7 @@ struct ad5272_data { struct i2c_client *client; struct mutex lock; const struct ad5272_cfg *cfg; - u8 buf[2] ____cacheline_aligned; + u8 buf[2] __aligned(IIO_DMA_MINALIGN); }; static const struct iio_chan_spec ad5272_channel = { -- 2.35.1
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