fixed a possible crash on WifiStateTracker

diff --git a/wifi/java/android/net/wifi/WifiStateTracker.java b/wifi/java/android/net/wifi/WifiStateTracker.java
index 26c848d..e0b4245 100644 (file)
--- a/wifi/java/android/net/wifi/WifiStateTracker.java
+++ b/wifi/java/android/net/wifi/WifiStateTracker.java
@@ -1272,6 +1272,8 @@ public class WifiStateTracker extends NetworkStateTracker {
      */
     public void resetConnections(boolean disableInterface) {
         if (LOCAL_LOGD) Log.d(TAG, "Reset connections and stopping DHCP");
+        if (mInterfaceName == null)
+            return;
         mHaveIpAddress = false;
         mObtainingIpAddress = false;
         mWifiInfo.setIpAddress(0);