X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvlib%2Fnode.c;h=2bb5bceadbcb26ca6b4b380dcb466e62fc7f698f;hb=2e8b0618b12d317f2a4632e69a0663dcd8dde472;hp=b6a44b2e99d0694c0e024d82407d3ec436780bce;hpb=bf103d99e651f3b221361f6d964ae84870fd7a6b;p=vpp.git

diff --git a/src/vlib/node.c b/src/vlib/node.c
index b6a44b2e99d..2bb5bceadbc 100644
--- a/src/vlib/node.c
+++ b/src/vlib/node.c
@@ -201,7 +201,8 @@ vlib_node_add_next_with_slot (vlib_main_t * vm,
 			      uword next_node_index, uword slot)
 {
   vlib_node_main_t *nm = &vm->node_main;
-  vlib_node_t *node, *next;
+  vlib_node_t *node, *next, *old_next;
+  u32 old_next_index;
   uword *p;
 
   ASSERT (vlib_get_thread_index () == 0);
@@ -228,6 +229,14 @@ vlib_node_add_next_with_slot (vlib_main_t * vm,
   vec_validate_init_empty (node->next_nodes, slot, ~0);
   vec_validate (node->n_vectors_by_next_node, slot);
 
+  if ((old_next_index = node->next_nodes[slot]) != ~0u)
+    {
+      hash_unset (node->next_slot_by_node, old_next_index);
+      old_next = vlib_get_node (vm, old_next_index);
+      old_next->prev_node_bitmap =
+	clib_bitmap_andnoti (old_next->prev_node_bitmap, node_index);
+    }
+
   node->next_nodes[slot] = next_node_index;
   hash_set (node->next_slot_by_node, next_node_index, slot);