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    Subject[PATCH 5.19 0671/1157] iio: common: ssp: Fix alignment for DMA safety
    Date
    From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

    [ Upstream commit 314d2b1978bb3d20b1ec239f4e28c394da493f36 ]

    ____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: 50dd64d57eee ("iio: common: ssp_sensors: Add sensorhub driver")
    Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
    Acked-by: Nuno Sá <nuno.sa@analog.com>
    Link: https://lore.kernel.org/r/20220508175712.647246-43-jic23@kernel.org
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/iio/common/ssp_sensors/ssp.h | 3 +--
    1 file changed, 1 insertion(+), 2 deletions(-)

    diff --git a/drivers/iio/common/ssp_sensors/ssp.h b/drivers/iio/common/ssp_sensors/ssp.h
    index abb832795619..f649cdecc277 100644
    --- a/drivers/iio/common/ssp_sensors/ssp.h
    +++ b/drivers/iio/common/ssp_sensors/ssp.h
    @@ -221,8 +221,7 @@ struct ssp_data {
    struct iio_dev *sensor_devs[SSP_SENSOR_MAX];
    atomic_t enable_refcount;

    - __le16 header_buffer[SSP_HEADER_BUFFER_SIZE / sizeof(__le16)]
    - ____cacheline_aligned;
    + __le16 header_buffer[SSP_HEADER_BUFFER_SIZE / sizeof(__le16)] __aligned(IIO_DMA_MINALIGN);
    };

    void ssp_clean_pending_list(struct ssp_data *data);
    --
    2.35.1


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