[bug] rdma-core/librdmacm/cma.c rdma_create_qp_ex：add id->cq refer to qp_attr->cq, when qp_attr->cq is not NULL, and id->cq is NULL

[靳文宾 <jinwenbinxue@163.com>]

I think the following modification is more correct, 
if there have something i dont know, pls tell me, thx





diff --git a/librdmacm/cma.c b/librdmacm/cma.c
index 7b924bd0d..9e71ba858 100644
--- a/librdmacm/cma.c
+++ b/librdmacm/cma.c
@@ -1654,10 +1654,20 @@ int rdma_create_qp_ex(struct rdma_cm_id *id,
        if (ret)
                return ret;


-       if (!attr->send_cq)
+       if (!attr->send_cq) {
                attr->send_cq = id->send_cq;
-       if (!attr->recv_cq)
+       } else {
+               if (!id->recv_cq)
+                       id->recv_cq = attr->recv_cq;
+       }
+       if (!attr->recv_cq) {
                attr->recv_cq = id->recv_cq;
+       } else {
+               if (!id->recv_cq)
+                       id->recv_cq = attr->recv_cq;
+       }
+
+       
        if (id->srq && !attr->srq)
                attr->srq = id->srq;
        qp = ibv_create_qp_ex(id->verbs, attr);