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    Subject[PATCH 5.12 617/700] iio: magn: rm3100: Fix alignment of buffer in iio_push_to_buffers_with_timestamp()
    Date
    From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

    [ Upstream commit b8f939fd20690623cb24845a563e7bc1e4a21482 ]

    Add __aligned(8) to ensure the buffer passed to
    iio_push_to_buffers_with_timestamp() is suitable for the naturally
    aligned timestamp that will be inserted.

    Here an explicit structure is not used, because this buffer is used in
    a non-trivial way for data repacking.

    Fixes: 121354b2eceb ("iio: magnetometer: Add driver support for PNI RM3100")
    Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
    Cc: Song Qiang <songqiang1304521@gmail.com>
    Reviewed-by: Nuno Sá <nuno.sa@analog.com>
    Link: https://lore.kernel.org/r/20210613152301.571002-6-jic23@kernel.org
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/iio/magnetometer/rm3100-core.c | 3 ++-
    1 file changed, 2 insertions(+), 1 deletion(-)

    diff --git a/drivers/iio/magnetometer/rm3100-core.c b/drivers/iio/magnetometer/rm3100-core.c
    index 7242897a05e9..720234a91db1 100644
    --- a/drivers/iio/magnetometer/rm3100-core.c
    +++ b/drivers/iio/magnetometer/rm3100-core.c
    @@ -78,7 +78,8 @@ struct rm3100_data {
    bool use_interrupt;
    int conversion_time;
    int scale;
    - u8 buffer[RM3100_SCAN_BYTES];
    + /* Ensure naturally aligned timestamp */
    + u8 buffer[RM3100_SCAN_BYTES] __aligned(8);
    struct iio_trigger *drdy_trig;

    /*
    --
    2.30.2


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