diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index 413ec3e..2077d85 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -1227,7 +1227,7 @@
     ALOGV("%d died, releasing its sessions", pid);
     size_t num = mAudioSessionRefs.size();
     bool removed = false;
-    for (size_t i = 0; i< num; ) {
+    for (size_t i = 0; i < num; ) {
         AudioSessionRef *ref = mAudioSessionRefs.itemAt(i);
         ALOGV(" pid %d @ %d", ref->mPid, i);
         if (ref->mPid == pid) {
@@ -2154,7 +2154,7 @@
     }
 
     size_t num = mAudioSessionRefs.size();
-    for (size_t i = 0; i< num; i++) {
+    for (size_t i = 0; i < num; i++) {
         AudioSessionRef *ref = mAudioSessionRefs.editItemAt(i);
         if (ref->mSessionid == audioSession && ref->mPid == caller) {
             ref->mCnt++;
@@ -2175,7 +2175,7 @@
         caller = pid;
     }
     size_t num = mAudioSessionRefs.size();
-    for (size_t i = 0; i< num; i++) {
+    for (size_t i = 0; i < num; i++) {
         AudioSessionRef *ref = mAudioSessionRefs.itemAt(i);
         if (ref->mSessionid == audioSession && ref->mPid == caller) {
             ref->mCnt--;
@@ -2193,6 +2193,18 @@
     ALOGW_IF(caller != getpid_cached, "session id %d not found for pid %d", audioSession, caller);
 }
 
+bool AudioFlinger::isSessionAcquired_l(int audioSession)
+{
+    size_t num = mAudioSessionRefs.size();
+    for (size_t i = 0; i < num; i++) {
+        AudioSessionRef *ref = mAudioSessionRefs.itemAt(i);
+        if (ref->mSessionid == audioSession) {
+            return true;
+        }
+    }
+    return false;
+}
+
 void AudioFlinger::purgeStaleEffects_l() {
 
     ALOGV("purging stale effects");
@@ -2533,8 +2545,9 @@
         sp<Client> client = registerPid(pid);
 
         // create effect on selected output thread
+        bool pinned = (sessionId > AUDIO_SESSION_OUTPUT_MIX) && isSessionAcquired_l(sessionId);
         handle = thread->createEffect_l(client, effectClient, priority, sessionId,
-                &desc, enabled, &lStatus);
+                &desc, enabled, &lStatus, pinned);
         if (handle != 0 && id != NULL) {
             *id = handle->id();
         }
@@ -2734,8 +2747,8 @@
     ALOGV("updateOrphanEffectChains session %d index %d", session, index);
     if (index >= 0) {
         sp<EffectChain> chain = mOrphanEffectChains.valueAt(index);
-        if (chain->removeEffect_l(effect) == 0) {
-            ALOGV("updateOrphanEffectChains removing effect chain at index %d", index);
+        if (chain->removeEffect_l(effect, true) == 0) {
+            ALOGV("updateOrphanEffectChains removing effect chain at index %zd", index);
             mOrphanEffectChains.removeItemsAt(index);
         }
         return true;