session: avoid transport cleanup if previously deleted

Type: fix

Change-Id: I485d38c7d9473e2ad1cbd8e17a788ec8d29ab001
Signed-off-by: Florin Coras <fcoras@cisco.com>
(cherry picked from commit cac31a4a23)

src/vnet/session/session.c

@@ -1283,6 +1283,7 @@ session_transport_cleanup (session_t * s)
 
   /* Delete from main lookup table before we axe the the transport */
   session_lookup_del_session (s);
+  if (s->session_state != SESSION_STATE_TRANSPORT_DELETED)
     transport_cleanup (session_get_transport_proto (s), s->connection_index,
 		       s->thread_index);
   /* Since we called cleanup, no delete notification will come. So, make