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    Subject[PATCH 5.18 0674/1095] iio: temp: maxim_thermocouple: Fix alignment for DMA safety
    Date
    From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

    [ Upstream commit 10897f34309b3c7bc14698407436c82d11c07f47 ]

    ____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: 1f25ca11d84a ("iio: temperature: add support for Maxim thermocouple chips")
    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/20220508175712.647246-93-jic23@kernel.org
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/iio/temperature/maxim_thermocouple.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/iio/temperature/maxim_thermocouple.c b/drivers/iio/temperature/maxim_thermocouple.c
    index 98c41cddc6f0..c28a7a6dea5f 100644
    --- a/drivers/iio/temperature/maxim_thermocouple.c
    +++ b/drivers/iio/temperature/maxim_thermocouple.c
    @@ -122,7 +122,7 @@ struct maxim_thermocouple_data {
    struct spi_device *spi;
    const struct maxim_thermocouple_chip *chip;

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

    --
    2.35.1


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