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    Subject[PATCH 5.15 628/917] RDMA/mlx4: Return missed an error if device doesnt support steering
    Date
    From: Leon Romanovsky <leonro@nvidia.com>

    [ Upstream commit f4e56ec4452f48b8292dcf0e1c4bdac83506fb8b ]

    The error flow fixed in this patch is not possible because all kernel
    users of create QP interface check that device supports steering before
    set IB_QP_CREATE_NETIF_QP flag.

    Fixes: c1c98501121e ("IB/mlx4: Add support for steerable IB UD QPs")
    Link: https://lore.kernel.org/r/91c61f6e60eb0240f8bbc321fda7a1d2986dd03c.1634023677.git.leonro@nvidia.com
    Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
    Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
    Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/infiniband/hw/mlx4/qp.c | 4 +++-
    1 file changed, 3 insertions(+), 1 deletion(-)

    diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c
    index 8662f462e2a5f..3a1a4ac9dd33d 100644
    --- a/drivers/infiniband/hw/mlx4/qp.c
    +++ b/drivers/infiniband/hw/mlx4/qp.c
    @@ -1099,8 +1099,10 @@ static int create_qp_common(struct ib_pd *pd, struct ib_qp_init_attr *init_attr,
    if (dev->steering_support ==
    MLX4_STEERING_MODE_DEVICE_MANAGED)
    qp->flags |= MLX4_IB_QP_NETIF;
    - else
    + else {
    + err = -EINVAL;
    goto err;
    + }
    }

    err = set_kernel_sq_size(dev, &init_attr->cap, qp_type, qp);
    --
    2.33.0


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