diff --git a/libs/gui/CpuConsumer.cpp b/libs/gui/CpuConsumer.cpp
index f909e3b..e5e02b4 100644
--- a/libs/gui/CpuConsumer.cpp
+++ b/libs/gui/CpuConsumer.cpp
@@ -168,6 +168,9 @@
     status_t err;
 
     if (!nativeBuffer) return BAD_VALUE;
+
+    Mutex::Autolock _l(mMutex);
+
     if (mCurrentLockedBuffers == mMaxLockedBuffers) {
         CC_LOGW("Max buffers have been locked (%zd), cannot lock anymore.",
                 mMaxLockedBuffers);
@@ -175,9 +178,6 @@
     }
 
     BufferItem b;
-
-    Mutex::Autolock _l(mMutex);
-
     err = acquireBufferLocked(&b, 0);
     if (err != OK) {
         if (err == BufferQueue::NO_BUFFER_AVAILABLE) {