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    Subject[PATCH 5.9 577/757] vdpa/mlx5: Make use of a specific 16 bit endianness API
    Date
    From: Eli Cohen <elic@nvidia.com>

    [ Upstream commit 36bdcf318bc21af24de10b68e32cdea6b9a8d17f ]

    Introduce a dedicated function to be used for setting 16 bit fields per
    virio endianness requirements and use it to set the mtu field.

    Signed-off-by: Eli Cohen <elic@nvidia.com>
    Link: https://lore.kernel.org/r/20200917121425.GA98139@mtl-vdi-166.wap.labs.mlnx
    Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
    Acked-by: Jason Wang <jasowang@redhat.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/vdpa/mlx5/net/mlx5_vnet.c | 8 ++++++--
    1 file changed, 6 insertions(+), 2 deletions(-)

    diff --git a/drivers/vdpa/mlx5/net/mlx5_vnet.c b/drivers/vdpa/mlx5/net/mlx5_vnet.c
    index 74264e5906951..56228467d7ec6 100644
    --- a/drivers/vdpa/mlx5/net/mlx5_vnet.c
    +++ b/drivers/vdpa/mlx5/net/mlx5_vnet.c
    @@ -1522,6 +1522,11 @@ static inline bool mlx5_vdpa_is_little_endian(struct mlx5_vdpa_dev *mvdev)
    (mvdev->actual_features & (1ULL << VIRTIO_F_VERSION_1));
    }

    +static __virtio16 cpu_to_mlx5vdpa16(struct mlx5_vdpa_dev *mvdev, u16 val)
    +{
    + return __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev), val);
    +}
    +
    static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features)
    {
    struct mlx5_vdpa_dev *mvdev = to_mvdev(vdev);
    @@ -1535,8 +1540,7 @@ static int mlx5_vdpa_set_features(struct vdpa_device *vdev, u64 features)
    return err;

    ndev->mvdev.actual_features = features & ndev->mvdev.mlx_features;
    - ndev->config.mtu = __cpu_to_virtio16(mlx5_vdpa_is_little_endian(mvdev),
    - ndev->mtu);
    + ndev->config.mtu = cpu_to_mlx5vdpa16(mvdev, ndev->mtu);
    return err;
    }

    --
    2.25.1


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