From 29d631c6f587e94f79c5362946e4fb07e81516e7 Mon Sep 17 00:00:00 2001
From: Simon Duquennoy <simonduq@sics.se>
Date: Wed, 3 Dec 2014 16:46:17 +0100
Subject: [PATCH] Do not use rpl_add_dag when RPL is used with a single dag per
 instance

---
 core/net/rpl/rpl-dag.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/core/net/rpl/rpl-dag.c b/core/net/rpl/rpl-dag.c
index 53ba956fa..5bc15d7af 100644
--- a/core/net/rpl/rpl-dag.c
+++ b/core/net/rpl/rpl-dag.c
@@ -948,6 +948,7 @@ rpl_join_instance(uip_ipaddr_t *from, rpl_dio_t *dio)
   }
 }
 
+#if RPL_MAX_DAG_PER_INSTANCE > 1
 /*---------------------------------------------------------------------------*/
 void
 rpl_add_dag(uip_ipaddr_t *from, rpl_dio_t *dio)
@@ -1027,6 +1028,7 @@ rpl_add_dag(uip_ipaddr_t *from, rpl_dio_t *dio)
   rpl_process_parent_event(instance, p);
   p->dtsn = dio->dtsn;
 }
+#endif /* RPL_MAX_DAG_PER_INSTANCE > 1 */
 
 /*---------------------------------------------------------------------------*/
 static void
@@ -1214,9 +1216,14 @@ rpl_process_dio(uip_ipaddr_t *from, rpl_dio_t *dio)
   }
 
   if(dag == NULL) {
+#if RPL_MAX_DAG_PER_INSTANCE > 1
     PRINTF("RPL: Adding new DAG to known instance.\n");
     rpl_add_dag(from, dio);
     return;
+#else /* RPL_MAX_DAG_PER_INSTANCE > 1 */
+    PRINTF("RPL: Only one instance supported.\n");
+    return;
+#endif /* RPL_MAX_DAG_PER_INSTANCE > 1 */
   }