zebra_mpls. Set best lsp nhlfe to null on deletion

When a nhlfe was deleted and it happened to be the best,
lsp->best_nhlfe was not updated causing lsp_process() to see
an inexistent nhlfe.
Fix: set lsp->best_nhlfe to null on deletion.

diff --git a/zebra/zebra_mpls.c b/zebra/zebra_mpls.c
index b057a78788294b29b0cf51ba49f9151915dd6a57..decf3f5f8df41aee3bea4fdc2abf4326d470a845 100644 (file)
--- a/zebra/zebra_mpls.c
+++ b/zebra/zebra_mpls.c
@@ -751,6 +751,9 @@ nhlfe_del (zebra_nhlfe_t *nhlfe)
   else
     lsp->nhlfe_list = nhlfe->next;
 
+  if (nhlfe == lsp->best_nhlfe)
+    lsp->best_nhlfe = NULL;
+
   XFREE (MTYPE_NHLFE, nhlfe);
 
   return 0;