diff --git a/[refs] b/[refs]
index fffa7e1fab71..1f8de200e9bb 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8c8696553aa3895c2ad4289537e4af45a8877b62
+refs/heads/master: e247a8f5d018740220c66bd5df1928d21d277d63
diff --git a/trunk/net/tipc/socket.c b/trunk/net/tipc/socket.c
index 9ae8e9f74028..3220d5cb5b5d 100644
--- a/trunk/net/tipc/socket.c
+++ b/trunk/net/tipc/socket.c
@@ -1419,7 +1419,7 @@ static int accept(struct socket *sock, struct socket *newsock, int flags)
 /**
  * shutdown - shutdown socket connection
  * @sock: socket structure
- * @how: direction to close (unused; always treated as read + write)
+ * @how: direction to close (must be SHUT_RDWR)
  *
  * Terminates connection (if necessary), then purges socket's receive queue.
  *
@@ -1432,7 +1432,8 @@ static int shutdown(struct socket *sock, int how)
 	struct sk_buff *buf;
 	int res;
 
-	/* Could return -EINVAL for an invalid "how", but why bother? */
+	if (how != SHUT_RDWR)
+		return -EINVAL;
 
 	if (mutex_lock_interruptible(&tsock->lock))
 		return -ERESTARTSYS;