From 41cc10520d2a28dfd3fa5dc50833155531739678 Mon Sep 17 00:00:00 2001
From: Johann Fischer <j.fischer@phytec.de>
Date: Wed, 6 May 2015 17:36:31 +0200
Subject: [PATCH] sys/.../icmp.c: fix prefix search

Replace equal operator inside ndp_prefix_info_search by not equal.
Otherwise, the existing prefix can not be found.
---
 sys/net/network_layer/sixlowpan/icmp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/net/network_layer/sixlowpan/icmp.c b/sys/net/network_layer/sixlowpan/icmp.c
index 391bf81b3a..f5e0cda532 100644
--- a/sys/net/network_layer/sixlowpan/icmp.c
+++ b/sys/net/network_layer/sixlowpan/icmp.c
@@ -1846,7 +1846,7 @@ ndp_prefix_info_t *ndp_prefix_info_search(int if_id, const ipv6_addr_t *addr,
                 }
             }
 
-            if (prefix->prefix_len == 0 && match > best_match) {
+            if ((prefix->prefix_len != 0) && (match > best_match)) {
                 tmp = prefix;
                 best_match = match;
             }