1 files changed, 29 insertions, 17 deletions

diff --git a/core/java/android/net/NetworkAgent.java b/core/java/android/net/NetworkAgent.java
index c2b06a2..1c18ba5 100644
--- a/core/java/android/net/NetworkAgent.java
+++ b/core/java/android/net/NetworkAgent.java
@@ -257,31 +257,43 @@ public abstract class NetworkAgent extends Handler {
     }
 
     /**
-     * called to go through our list of requests and see if we're
-     * good enough to try connecting.
+     * Called to go through our list of requests and see if we're
+     * good enough to try connecting, or if we have gotten worse and
+     * need to disconnect.
      *
-     * Only does connects - we disconnect when requested via
+     * Once we are registered, does nothing: we disconnect when requested via
      * CMD_CHANNEL_DISCONNECTED, generated by either a loss of connection
      * between modules (bearer or ConnectivityService dies) or more commonly
      * when the NetworkInfo reports to ConnectivityService it is disconnected.
      */
     private void evalScores() {
-        if (mConnectionRequested) {
-            if (VDBG) log("evalScores - already trying - size=" + mNetworkRequests.size());
-            // already trying
-            return;
-        }
-        if (VDBG) log("evalScores!");
-        for (int i=0; i < mNetworkRequests.size(); i++) {
-            int score = mNetworkRequests.valueAt(i).score;
-            if (VDBG) log(" checking request Min " + score + " vs my score " + mNetworkScore);
-            if (score < mNetworkScore) {
-                // have a request that has a lower scored network servicing it
-                // (or no network) than we could provide, so lets connect!
-                mConnectionRequested = true;
-                connect();
+        synchronized(mLockObj) {
+            if (mRegistered) {
+                if (VDBG) log("evalScores - already connected - size=" + mNetworkRequests.size());
+                // already trying
                 return;
             }
+            if (VDBG) log("evalScores!");
+            for (int i=0; i < mNetworkRequests.size(); i++) {
+                int score = mNetworkRequests.valueAt(i).score;
+                if (VDBG) log(" checking request Min " + score + " vs my score " + mNetworkScore);
+                if (score < mNetworkScore) {
+                    // have a request that has a lower scored network servicing it
+                    // (or no network) than we could provide, so let's connect!
+                    mConnectionRequested = true;
+                    connect();
+                    return;
+                }
+            }
+            // Our score is not high enough to satisfy any current request.
+            // This can happen if our score goes down after a connection is
+            // requested but before we actually connect. In this case, disconnect
+            // rather than continue trying - there's no point connecting if we know
+            // we'll just be torn down as soon as we do.
+            if (mConnectionRequested) {
+                mConnectionRequested = false;
+                disconnect();
+            }
         }
     }