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    Subject[PATCH 5.19 0655/1157] iio: adc: max1241: Fix alignment for DMA safety
    Date
    From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

    [ Upstream commit 9d7019e43ee67a48cef63f8f23f002233064d390 ]

    ____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: 8a80a71d9020 ("iio: adc: Add MAX1241 driver")
    Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
    Acked-by: Alexandru Lazar <alazar@startmail.com>
    Acked-by: Nuno Sá <nuno.sa@analog.com>
    Link: https://lore.kernel.org/r/20220508175712.647246-27-jic23@kernel.org
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/iio/adc/max1241.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/iio/adc/max1241.c b/drivers/iio/adc/max1241.c
    index a5afd84af58b..a815ad1f6913 100644
    --- a/drivers/iio/adc/max1241.c
    +++ b/drivers/iio/adc/max1241.c
    @@ -26,7 +26,7 @@ struct max1241 {
    struct regulator *vref;
    struct gpio_desc *shutdown;

    - __be16 data ____cacheline_aligned;
    + __be16 data __aligned(IIO_DMA_MINALIGN);
    };

    static const struct iio_chan_spec max1241_channels[] = {
    --
    2.35.1


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