RDMA/cxgb4: Don't use null ep ptr

In c4iw_modify_qp() error path, only use qhp->ep if ep is not already set.
Otherwise qhp->ep can be NULL and we crash.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/cxgb4/qp.c b/drivers/infiniband/hw/cxgb4/qp.c
index 5d11f8601599621a0eaea34260a32d0f969640c5..4f5dd66da39d0b89cc758d61bf46462fee149a4c 100644 (file)
--- a/drivers/infiniband/hw/cxgb4/qp.c
+++ b/drivers/infiniband/hw/cxgb4/qp.c
@@ -1305,7 +1305,8 @@ int c4iw_modify_qp(struct c4iw_dev *rhp, struct c4iw_qp *qhp,
 
        /* disassociate the LLP connection */
        qhp->attr.llp_stream_handle = NULL;
-       ep = qhp->ep;
+       if (!ep)
+               ep = qhp->ep;
        qhp->ep = NULL;
        qhp->attr.state = C4IW_QP_STATE_ERROR;
        free = 1;