4.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Eli Cohen <eli@xxxxxxxxxxxx> commit a1ab8402d15d2305d2315d96ec3294bfdf16587e upstream. For XRC QP CQs may not exist. Check before attempting dereference. Fixes: e126ba97dba9 ('mlx5: Add driver for Mellanox Connect-IB adapters') Signed-off-by: Eli Cohen <eli@xxxxxxxxxxxx> Signed-off-by: Maor Gottlieb <maorg@xxxxxxxxxxxx> Reviewed-by: Yishai Hadas <yishaih@xxxxxxxxxxxx> Signed-off-by: Leon Romanovsky <leon@xxxxxxxxxx> Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/infiniband/hw/mlx5/qp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -2037,8 +2037,8 @@ struct ib_qp *mlx5_ib_create_qp(struct i mlx5_ib_dbg(dev, "ib qpnum 0x%x, mlx qpn 0x%x, rcqn 0x%x, scqn 0x%x\n", qp->ibqp.qp_num, qp->trans_qp.base.mqp.qpn, - to_mcq(init_attr->recv_cq)->mcq.cqn, - to_mcq(init_attr->send_cq)->mcq.cqn); + init_attr->recv_cq ? to_mcq(init_attr->recv_cq)->mcq.cqn : -1, + init_attr->send_cq ? to_mcq(init_attr->send_cq)->mcq.cqn : -1); qp->trans_qp.xrcdn = xrcdn; -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html