diff --git a/media/libaudioclient/AudioSystem.cpp b/media/libaudioclient/AudioSystem.cpp
index 1c4a80e82a..39ee437044 100644
--- a/media/libaudioclient/AudioSystem.cpp
+++ b/media/libaudioclient/AudioSystem.cpp
@@ -20,6 +20,7 @@
 #include <utils/Log.h>
 #include <binder/IServiceManager.h>
 #include <binder/ProcessState.h>
+#include <binder/IPCThreadState.h>
 #include <media/AudioResamplerPublic.h>
 #include <media/AudioSystem.h>
 #include <media/IAudioFlinger.h>
@@ -75,7 +76,9 @@ const sp<IAudioFlinger> AudioSystem::get_audio_flinger()
         af = gAudioFlinger;
     }
     if (afc != 0) {
+        int64_t token = IPCThreadState::self()->clearCallingIdentity();
         af->registerClient(afc);
+        IPCThreadState::self()->restoreCallingIdentity(token);
     }
     return af;
 }
@@ -767,7 +770,10 @@ const sp<IAudioPolicyService> AudioSystem::get_audio_policy_service()
         ap = gAudioPolicyService;
     }
     if (apc != 0) {
+        int64_t token = IPCThreadState::self()->clearCallingIdentity();
         ap->registerClient(apc);
+        ap->setAudioPortCallbacksEnabled(apc->isAudioPortCbEnabled());
+        IPCThreadState::self()->restoreCallingIdentity(token);
     }
 
     return ap;
diff --git a/media/libaudioclient/include/media/AudioSystem.h b/media/libaudioclient/include/media/AudioSystem.h
index 22b700d6b7..0c4d6ee9a8 100644
--- a/media/libaudioclient/include/media/AudioSystem.h
+++ b/media/libaudioclient/include/media/AudioSystem.h
@@ -431,6 +431,7 @@ private:
 
         int addAudioPortCallback(const sp<AudioPortCallback>& callback);
         int removeAudioPortCallback(const sp<AudioPortCallback>& callback);
+        bool isAudioPortCbEnabled() const { return (mAudioPortCallbacks.size() != 0); }
 
         // DeathRecipient
         virtual void binderDied(const wp<IBinder>& who);