diff --git a/net/rds/tcp.c b/net/rds/tcp.c
index 61ed2a8764ba..9134544941c2 100644
--- a/net/rds/tcp.c
+++ b/net/rds/tcp.c
@@ -127,7 +127,7 @@ void rds_tcp_restore_callbacks(struct socket *sock,
 
 /*
  * This is the only path that sets tc->t_sock.  Send and receive trust that
- * it is set.  The RDS_CONN_CONNECTED bit protects those paths from being
+ * it is set.  The RDS_CONN_UP bit protects those paths from being
  * called while it isn't set.
  */
 void rds_tcp_set_callbacks(struct socket *sock, struct rds_connection *conn)
diff --git a/net/rds/tcp_listen.c b/net/rds/tcp_listen.c
index 0936a4a32b47..0896187243d6 100644
--- a/net/rds/tcp_listen.c
+++ b/net/rds/tcp_listen.c
@@ -115,24 +115,32 @@ int rds_tcp_accept_one(struct socket *sock)
 	 * rds_tcp_state_change() will do that cleanup
 	 */
 	rs_tcp = (struct rds_tcp_connection *)conn->c_transport_data;
-	if (rs_tcp->t_sock &&
-	    ntohl(inet->inet_saddr) < ntohl(inet->inet_daddr)) {
-		struct sock *nsk = new_sock->sk;
-
-		nsk->sk_user_data = NULL;
-		nsk->sk_prot->disconnect(nsk, 0);
-		tcp_done(nsk);
-		new_sock = NULL;
-		ret = 0;
-		goto out;
-	} else if (rs_tcp->t_sock) {
-		rds_tcp_restore_callbacks(rs_tcp->t_sock, rs_tcp);
-		conn->c_outgoing = 0;
-	}
-
 	rds_conn_transition(conn, RDS_CONN_DOWN, RDS_CONN_CONNECTING);
+	if (rs_tcp->t_sock) {
+		/* Need to resolve a duelling SYN between peers.
+		 * We have an outstanding SYN to this peer, which may
+		 * potentially have transitioned to the RDS_CONN_UP state,
+		 * so we must quiesce any send threads before resetting
+		 * c_transport_data.
+		 */
+		wait_event(conn->c_waitq,
+			   !test_bit(RDS_IN_XMIT, &conn->c_flags));
+		if (ntohl(inet->inet_saddr) < ntohl(inet->inet_daddr)) {
+			struct sock *nsk = new_sock->sk;
+
+			nsk->sk_user_data = NULL;
+			nsk->sk_prot->disconnect(nsk, 0);
+			tcp_done(nsk);
+			new_sock = NULL;
+			ret = 0;
+			goto out;
+		} else if (rs_tcp->t_sock) {
+			rds_tcp_restore_callbacks(rs_tcp->t_sock, rs_tcp);
+			conn->c_outgoing = 0;
+		}
+	}
 	rds_tcp_set_callbacks(new_sock, conn);
-	rds_connect_complete(conn);
+	rds_connect_complete(conn); /* marks RDS_CONN_UP */
 	new_sock = NULL;
 	ret = 0;