span: add feature (rx only) (VPP-185)

[vpp.git] / vnet / vnet / feature / feature.c

diff --git a/vnet/vnet/feature/feature.c b/vnet/vnet/feature/feature.c
index 1f46285..c8cde36 100644 (file)
--- a/vnet/vnet/feature/feature.c
+++ b/vnet/vnet/feature/feature.c
@@ -187,6 +187,11 @@ vnet_feature_enable_disable_with_index (u8 arc_index, u32 feature_index,
   vec_validate_init_empty (cm->config_index_by_sw_if_index, sw_if_index, ~0);
   ci = cm->config_index_by_sw_if_index[sw_if_index];
 
+  vec_validate (fm->feature_count_by_sw_if_index[arc_index], sw_if_index);
+  if (!enable_disable
+      && fm->feature_count_by_sw_if_index[arc_index][sw_if_index] < 1)
+    return 0;
+
   ci = (enable_disable
        ? vnet_config_add_feature
        : vnet_config_del_feature)