diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index c7aa26b..1907e12 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -1153,7 +1153,7 @@
             mSuspendedSessions.valueAt(index);
 
     for (size_t i = 0; i < sessionEffects.size(); i++) {
-        sp<SuspendedSessionDesc> desc = sessionEffects.valueAt(i);
+        const sp<SuspendedSessionDesc>& desc = sessionEffects.valueAt(i);
         for (int j = 0; j < desc->mRefCount; j++) {
             if (sessionEffects.keyAt(i) == EffectChain::kKeyForSuspendAll) {
                 chain->setEffectSuspendedAll_l(true);
@@ -2929,14 +2929,14 @@
 }
 
 status_t AudioFlinger::PlaybackThread::attachAuxEffect(
-        const sp<AudioFlinger::PlaybackThread::Track> track, int EffectId)
+        const sp<AudioFlinger::PlaybackThread::Track>& track, int EffectId)
 {
     Mutex::Autolock _l(mLock);
     return attachAuxEffect_l(track, EffectId);
 }
 
 status_t AudioFlinger::PlaybackThread::attachAuxEffect_l(
-        const sp<AudioFlinger::PlaybackThread::Track> track, int EffectId)
+        const sp<AudioFlinger::PlaybackThread::Track>& track, int EffectId)
 {
     status_t status = NO_ERROR;