From dce921c1cd8be6d5d0bb1cdac3de6781197052cd Mon Sep 17 00:00:00 2001
From: Librae <librae8226@gmail.com>
Date: Mon, 27 Jul 2015 14:16:45 -0600
Subject: [PATCH] Check if DNS server has been initialized before trying to
 lookup the server address in the cache.  From Librae

---
 libc/netdb/lib_dnsclient.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libc/netdb/lib_dnsclient.c b/libc/netdb/lib_dnsclient.c
index 873022f459..a959005f53 100644
--- a/libc/netdb/lib_dnsclient.c
+++ b/libc/netdb/lib_dnsclient.c
@@ -1029,6 +1029,14 @@ int dns_find_answer(FAR const char *hostname, FAR struct sockaddr *addr,
   int next;
   int ndx;
 
+  /* If DNS not initialized, no need to proceed */
+
+  if (!g_dns_initialized)
+    {
+      ndbg("ERROR: DNS not initialized yet\n");
+      return -EAGAIN;
+    }
+
   /* Get exclusive access to the DNS cache */
 
   dns_semtake();