# \[PATCH 4.9 128/207\] RDMA/mlx4: Return missed an error if device doesnt support steering - From: Greg Kroah-Hartman \ - Date: 2021-11-24 12:24:21 - List: stable - Page: https://ratatoskr.run/stable/2021/11/1584080 - Thread: https://ratatoskr.run/stable/2021/11/1583929/t/2.md ```text From: Leon Romanovsky [ 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 Signed-off-by: Leon Romanovsky Signed-off-by: Jason Gunthorpe Signed-off-by: Sasha Levin --- 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 7284a9176844e..718d817265795 100644 --- a/drivers/infiniband/hw/mlx4/qp.c +++ b/drivers/infiniband/hw/mlx4/qp.c @@ -773,8 +773,10 @@ static int create_qp_common(struct mlx4_ib_dev *dev, struct ib_pd *pd, if (dev->steering_support == MLX4_STEERING_MODE_DEVICE_MANAGED) qp->flags |= MLX4_IB_QP_NETIF; - else + else { + err = -EINVAL; goto err; + } } memcpy(&backup_cap, &init_attr->cap, sizeof(backup_cap)); -- 2.33.0 ```