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    Subject[PATCH 5.19 0711/1157] iio: potentiometer: max5481: Fix alignment for DMA safety
    Date
    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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