1 files changed, 30 insertions, 6 deletions

diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index c62ff9e7f8c6..dadc486b92f0 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -349,7 +349,8 @@ static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_a
 	return ret;
 }
 
-static int cma_acquire_dev(struct rdma_id_private *id_priv)
+static int cma_acquire_dev(struct rdma_id_private *id_priv,
+			   struct rdma_id_private *listen_id_priv)
 {
 	struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
 	struct cma_device *cma_dev;
@@ -367,8 +368,30 @@ static int cma_acquire_dev(struct rdma_id_private *id_priv)
 	iboe_addr_get_sgid(dev_addr, &iboe_gid);
 	memcpy(&gid, dev_addr->src_dev_addr +
 	       rdma_addr_gid_offset(dev_addr), sizeof gid);
+	if (listen_id_priv &&
+	    rdma_port_get_link_layer(listen_id_priv->id.device,
+				     listen_id_priv->id.port_num) == dev_ll) {
+		cma_dev = listen_id_priv->cma_dev;
+		port = listen_id_priv->id.port_num;
+		if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
+		    rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
+			ret = ib_find_cached_gid(cma_dev->device, &iboe_gid,
+						 &found_port, NULL);
+		else
+			ret = ib_find_cached_gid(cma_dev->device, &gid,
+						 &found_port, NULL);
+
+		if (!ret && (port  == found_port)) {
+			id_priv->id.port_num = found_port;
+			goto out;
+		}
+	}
 	list_for_each_entry(cma_dev, &dev_list, list) {
-		for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port)
+		for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
+			if (listen_id_priv &&
+			    listen_id_priv->cma_dev == cma_dev &&
+			    listen_id_priv->id.port_num == port)
+				continue;
 			if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
 				if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
 				    rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
@@ -381,6 +404,7 @@ static int cma_acquire_dev(struct rdma_id_private *id_priv)
 					goto out;
 				}
 			}
+		}
 	}
 
 out:
@@ -1269,7 +1293,7 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
 	}
 
 	mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
-	ret = cma_acquire_dev(conn_id);
+	ret = cma_acquire_dev(conn_id, listen_id);
 	if (ret)
 		goto err2;
 
@@ -1458,7 +1482,7 @@ static int iw_conn_req_handler(struct iw_cm_id *cm_id,
 		goto out;
 	}
 
-	ret = cma_acquire_dev(conn_id);
+	ret = cma_acquire_dev(conn_id, listen_id);
 	if (ret) {
 		mutex_unlock(&conn_id->handler_mutex);
 		rdma_destroy_id(new_cm_id);
@@ -2027,7 +2051,7 @@ static void addr_handler(int status, struct sockaddr *src_addr,
 		goto out;
 
 	if (!status && !id_priv->cma_dev)
-		status = cma_acquire_dev(id_priv);
+		status = cma_acquire_dev(id_priv, NULL);
 
 	if (status) {
 		if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
@@ -2524,7 +2548,7 @@ int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
 		if (ret)
 			goto err1;
 
-		ret = cma_acquire_dev(id_priv);
+		ret = cma_acquire_dev(id_priv, NULL);
 		if (ret)
 			goto err1;
 	}