From 7dbc20d2ddecc65d84622c7f2c9ff7e1c18e77bd Mon Sep 17 00:00:00 2001
From: Jonathan Hui <jonhui@nestlabs.com>
Date: Wed, 27 Sep 2017 12:18:41 -0700
Subject: [PATCH] [mle] fix MLE Link Accept timeout on resync after boot
 (#2230)

---
 src/core/thread/mle_router.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/core/thread/mle_router.cpp b/src/core/thread/mle_router.cpp
index 42affd985..ccd5c7aec 100644
--- a/src/core/thread/mle_router.cpp
+++ b/src/core/thread/mle_router.cpp
@@ -1793,8 +1793,13 @@ void MleRouter::HandleStateUpdateTimer(void)
         break;
 
     case OT_DEVICE_ROLE_DETACHED:
-        BecomeDetached();
-        ExitNow();
+        if (mChallengeTimeout == 0)
+        {
+            BecomeDetached();
+            ExitNow();
+        }
+
+        break;
 
     case OT_DEVICE_ROLE_CHILD:
         if (routerStateUpdate)