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    Subject[PATCH 5.19 0706/1157] iio: imu: inv_icm42600: Fix alignment for DMA safety
    Date
    From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

    [ Upstream commit 848847702bd10bf0bf547e38adc44c14e9742784 ]

    Partial fix for this driver as a second instance was introduced in
    a later patch.

    ____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: a095fadb443b ("iio: imu: inv_icm42600: add gyroscope IIO device")
    Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
    Acked-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@tdk.com>
    Acked-by: Nuno Sá <nuno.sa@analog.com>
    Link: https://lore.kernel.org/r/20220508175712.647246-78-jic23@kernel.org
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/iio/imu/inv_icm42600/inv_icm42600.h | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/iio/imu/inv_icm42600/inv_icm42600.h b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
    index 995a9dc06521..3d91469beccb 100644
    --- a/drivers/iio/imu/inv_icm42600/inv_icm42600.h
    +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600.h
    @@ -141,7 +141,7 @@ struct inv_icm42600_state {
    struct inv_icm42600_suspended suspended;
    struct iio_dev *indio_gyro;
    struct iio_dev *indio_accel;
    - uint8_t buffer[2] ____cacheline_aligned;
    + uint8_t buffer[2] __aligned(IIO_DMA_MINALIGN);
    struct inv_icm42600_fifo fifo;
    struct {
    int64_t gyro;
    --
    2.35.1


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