From 6158bd564f058ac09d7d03d388a078e5fd2914ac Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Tue, 9 Feb 2016 01:31:00 +0100
Subject: [PATCH] Bug 1246850 - check the NotifyIpInterfaceChange() return
 code, r=mcmanus

---
 netwerk/system/win32/nsNotifyAddrListener.cpp | 25 +++++++++++--------
 1 file changed, 15 insertions(+), 10 deletions(-)

diff --git a/netwerk/system/win32/nsNotifyAddrListener.cpp b/netwerk/system/win32/nsNotifyAddrListener.cpp
index 83318a9108b..68d830ea88b 100644
--- a/netwerk/system/win32/nsNotifyAddrListener.cpp
+++ b/netwerk/system/win32/nsNotifyAddrListener.cpp
@@ -220,16 +220,21 @@ nsNotifyAddrListener::Run()
             false, // no initial notification
             &interfacechange);
 
-        do {
-            ret = WaitForSingleObject(mCheckEvent, waitTime);
-            if (!mShutdown) {
-                waitTime = nextCoalesceWaitTime();
-            }
-            else {
-                break;
-            }
-        } while (ret != WAIT_FAILED);
-        sCancelMibChangeNotify2(interfacechange);
+        if (ret == NO_ERROR) {
+            do {
+                ret = WaitForSingleObject(mCheckEvent, waitTime);
+                if (!mShutdown) {
+                    waitTime = nextCoalesceWaitTime();
+                }
+                else {
+                    break;
+                }
+            } while (ret != WAIT_FAILED);
+            sCancelMibChangeNotify2(interfacechange);
+        } else {
+            LOG(("Link Monitor: sNotifyIpInterfaceChange returned %d\n",
+                 (int)ret));
+        }
     }
     return NS_OK;
 }