Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.19 0711/1157] iio: potentiometer: max5481: Fix alignment for DMA safety | Date | Mon, 15 Aug 2022 20:01:07 +0200 |
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From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
[ Upstream commit ec1ac1c0e7a14657d729159ccfbea72f434bdaf1 ]
____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: df1fd2de118e ("iio: max5481: Add support for Maxim digital potentiometers") Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Nuno Sá <nuno.sa@analog.com> Link: https://lore.kernel.org/r/20220508175712.647246-83-jic23@kernel.org Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/iio/potentiometer/max5481.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iio/potentiometer/max5481.c b/drivers/iio/potentiometer/max5481.c index 098d144a8fdd..b40e5ac218d7 100644 --- a/drivers/iio/potentiometer/max5481.c +++ b/drivers/iio/potentiometer/max5481.c @@ -44,7 +44,7 @@ static const struct max5481_cfg max5481_cfg[] = { struct max5481_data { struct spi_device *spi; const struct max5481_cfg *cfg; - u8 msg[3] ____cacheline_aligned; + u8 msg[3] __aligned(IIO_DMA_MINALIGN); }; #define MAX5481_CHANNEL { \ -- 2.35.1
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