lkml.org 
[lkml]   [2022]   [Aug]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 5.18 0660/1095] iio: imu: fxos8700: Fix alignment for DMA safety
    Date
    From: Jonathan Cameron <Jonathan.Cameron@huawei.com>

    [ Upstream commit c9a8417a13ed9c81383662fca8a4b89f84d31e78 ]

    ____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: 84e5ddd5c46e ("iio: imu: Add support for the FXOS8700 IMU")
    Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
    Cc: Robert Jones <rjones@gateworks.com>
    Acked-by: Nuno Sá <nuno.sa@analog.com>
    Link: https://lore.kernel.org/r/20220508175712.647246-77-jic23@kernel.org
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/iio/imu/fxos8700_core.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/iio/imu/fxos8700_core.c b/drivers/iio/imu/fxos8700_core.c
    index ab288186f36e..423cfe526f2a 100644
    --- a/drivers/iio/imu/fxos8700_core.c
    +++ b/drivers/iio/imu/fxos8700_core.c
    @@ -167,7 +167,7 @@
    struct fxos8700_data {
    struct regmap *regmap;
    struct iio_trigger *trig;
    - __be16 buf[FXOS8700_DATA_BUF_SIZE] ____cacheline_aligned;
    + __be16 buf[FXOS8700_DATA_BUF_SIZE] __aligned(IIO_DMA_MINALIGN);
    };

    /* Regmap info */
    --
    2.35.1


    \
     
     \ /
      Last update: 2022-08-15 23:50    [W:2.832 / U:0.076 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site