diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index bce7e25..f0f1dc9 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -10222,19 +10222,22 @@
 
 void AudioFlinger::MmapThread::checkInvalidTracks_l()
 {
+    sp<MmapStreamCallback> callback;
     for (const sp<MmapTrack> &track : mActiveTracks) {
         if (track->isInvalid()) {
-            sp<MmapStreamCallback> callback = mCallback.promote();
-            if (callback != 0) {
-                mLock.unlock();
-                callback->onTearDown(track->portId());
-                mLock.lock();
-            } else if (mNoCallbackWarningCount < kMaxNoCallbackWarnings) {
-                ALOGW("Could not notify MMAP stream tear down: no onTearDown callback!");
+            callback = mCallback.promote();
+            if (callback == nullptr &&  mNoCallbackWarningCount < kMaxNoCallbackWarnings) {
+                ALOGW("Could not notify MMAP stream tear down: no onRoutingChanged callback!");
                 mNoCallbackWarningCount++;
             }
+            break;
         }
     }
+    if (callback != 0) {
+        mLock.unlock();
+        callback->onRoutingChanged(AUDIO_PORT_HANDLE_NONE);
+        mLock.lock();
+    }
 }
 
 void AudioFlinger::MmapThread::dumpInternals_l(int fd, const Vector<String16>& args __unused)