diff --git a/services/surfaceflinger/BufferLayerConsumer.cpp b/services/surfaceflinger/BufferLayerConsumer.cpp
index 648d129..8722952 100644
--- a/services/surfaceflinger/BufferLayerConsumer.cpp
+++ b/services/surfaceflinger/BufferLayerConsumer.cpp
@@ -452,6 +452,13 @@
 }
 
 void BufferLayerConsumer::onDisconnect() {
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        // Nothing to do if we're already abandoned.
+        return;
+    }
+
     mLayer->onDisconnect();
 }
 
@@ -486,6 +493,13 @@
 
 void BufferLayerConsumer::addAndGetFrameTimestamps(const NewFrameEventsEntry* newTimestamps,
                                                    FrameEventHistoryDelta* outDelta) {
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        // Nothing to do if we're already abandoned.
+        return;
+    }
+
     mLayer->addAndGetFrameTimestamps(newTimestamps, outDelta);
 }