Fixes hang of 'ovs-appctl ofproto/tnl-push-pop' when an invalid
argument passed.

Signed-off-by: Ilya Maximets <i.maxim...@samsung.com>
---
 ofproto/ofproto-dpif.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ofproto/ofproto-dpif.c b/ofproto/ofproto-dpif.c
index d920ed0..6561c65 100644
--- a/ofproto/ofproto-dpif.c
+++ b/ofproto/ofproto-dpif.c
@@ -5328,6 +5328,8 @@ disable_tnl_push_pop(struct unixctl_conn *conn 
OVS_UNUSED, int argc OVS_UNUSED,
         ofproto_use_tnl_push_pop = true;
         unixctl_command_reply(conn, "Tunnel push-pop on");
         ofproto_revalidate_all_backers();
+    } else {
+        unixctl_command_reply_error(conn, "Invalid argument");
     }
 }
 
-- 
2.1.4

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