DO NOT MERGE: MDST is not ready until connected to DcTracker.

When the system becomes loaded the PhoneApp can be delayed
significantly and a call to setEnableFailFastMobileData may not
occur because the channel between the MobileDataStateTracker (MDST)
and DcTracker (DCT) is not connected.

Solution: Add a isReady to MDST and isMobileDataStateTrackerReady to
ConnectivityService and call it from isMobileOk.

Bug: 10351868
Change-Id: I92f9d58121b88186b636cd71c2fd2ef9a28f7cf6

2 files changed, 30 insertions, 5 deletions

diff --git a/core/java/android/net/MobileDataStateTracker.java b/core/java/android/net/MobileDataStateTracker.java
index adad8decca89..98cccb869d2f 100644
--- a/core/java/android/net/MobileDataStateTracker.java
+++ b/core/java/android/net/MobileDataStateTracker.java
@@ -375,6 +375,13 @@ public class MobileDataStateTracker implements NetworkStateTracker {
         return (setEnableApn(mApnType, false) != PhoneConstants.APN_REQUEST_FAILED);
     }
 
+    /**
+     * @return true if this is ready to operate
+     */
+    public boolean isReady() {
+        return mDataConnectionTrackerAc != null;
+    }
+
     @Override
     public void captivePortalCheckComplete() {
         // not implemented
diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index fa016f458748..06708191d9e4 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -3572,6 +3572,12 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                          enabled));
     }
 
+    private boolean isMobileDataStateTrackerReady() {
+        MobileDataStateTracker mdst =
+                (MobileDataStateTracker) mNetTrackers[ConnectivityManager.TYPE_MOBILE];
+        return (mdst != null) && (mdst.isReady());
+    }
+
     @Override
     public int checkMobileProvisioning(boolean sendNotification, int suggestedTimeOutMs,
             final ResultReceiver resultReceiver) {
@@ -3739,14 +3745,26 @@ public class ConnectivityService extends IConnectivityManager.Stub {
             }
 
             try {
-                // Enable fail fast as we'll do retries here and use a
-                // hipri connection so the default connection stays active.
-                log("isMobileOk: start hipri url=" + params.mUrl);
-                mCs.setEnableFailFastMobileData(DctConstants.ENABLED);
-
                 // Continue trying to connect until time has run out
                 long endTime = SystemClock.elapsedRealtime() + params.mTimeOutMs;
 
+                if (!mCs.isMobileDataStateTrackerReady()) {
+                    // Wait for MobileDataStateTracker to be ready.
+                    if (DBG) log("isMobileOk: mdst is not ready");
+                    while(SystemClock.elapsedRealtime() < endTime) {
+                        if (mCs.isMobileDataStateTrackerReady()) {
+                            // Enable fail fast as we'll do retries here and use a
+                            // hipri connection so the default connection stays active.
+                            if (DBG) log("isMobileOk: mdst ready, enable fail fast of mobile data");
+                            mCs.setEnableFailFastMobileData(DctConstants.ENABLED);
+                            break;
+                        }
+                        sleep(1);
+                    }
+                }
+
+                log("isMobileOk: start hipri url=" + params.mUrl);
+
                 // First wait until we can start using hipri
                 Binder binder = new Binder();
                 while(SystemClock.elapsedRealtime() < endTime) {