[PATCH rdma-rc 11/12] IB/mlx5: Fix NULL pointer dereference on debug print

[Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

From: Eli Cohen <eli-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>

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-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Maor Gottlieb <maorg-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Reviewed-by: Yishai Hadas <yishaih-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
Signed-off-by: Leon Romanovsky <leon-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 drivers/infiniband/hw/mlx5/qp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/hw/mlx5/qp.c b/drivers/infiniband/hw/mlx5/qp.c
index 2ba0bbf..9806868 100644
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -2079,8 +2079,8 @@ struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd,
 
 		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;
 
-- 
2.7.4

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