diff --git a/include/gui/ConsumerBase.h b/include/gui/ConsumerBase.h
index 891290b..7912528 100644
--- a/include/gui/ConsumerBase.h
+++ b/include/gui/ConsumerBase.h
@@ -241,9 +241,7 @@
 
     // mFrameAvailableListener is the listener object that will be called when a
     // new frame becomes available. If it is not NULL it will be called from
-    // queueBuffer. The listener object is protected by mFrameAvailableMutex
-    // (not mMutex).
-    Mutex mFrameAvailableMutex;
+    // queueBuffer.
     wp<FrameAvailableListener> mFrameAvailableListener;
 
     // The ConsumerBase has-a BufferQueue and is responsible for creating this object
diff --git a/libs/binder/tests/Android.bp b/libs/binder/tests/Android.bp
index 853ca16..3071408 100644
--- a/libs/binder/tests/Android.bp
+++ b/libs/binder/tests/Android.bp
@@ -15,6 +15,13 @@
 //
 
 cc_test {
+    name: "binderDriverInterfaceTest_IPC_32",
+    srcs: ["binderDriverInterfaceTest.cpp"],
+    compile_multilib: "32",
+    cflags: ["-DBINDER_IPC_32BIT=1"],
+}
+
+cc_test {
     product_variables: {
         binder32bit: {
             cflags: ["-DBINDER_IPC_32BIT=1"],
@@ -35,6 +42,23 @@
 }
 
 cc_test {
+    name: "binderLibTest_IPC_32",
+    srcs: ["binderLibTest.cpp"],
+    shared_libs: [
+        "libbinder",
+        "libutils",
+    ],
+    compile_multilib: "32",
+    cflags: ["-DBINDER_IPC_32BIT=1"],
+}
+
+cc_test {
+    product_variables: {
+        binder32bit: {
+            cflags: ["-DBINDER_IPC_32BIT=1"],
+        },
+    },
+
     name: "binderLibTest",
     srcs: ["binderLibTest.cpp"],
     shared_libs: [
diff --git a/libs/binder/tests/binderLibTest.cpp b/libs/binder/tests/binderLibTest.cpp
index 757291c..a04869a 100644
--- a/libs/binder/tests/binderLibTest.cpp
+++ b/libs/binder/tests/binderLibTest.cpp
@@ -681,10 +681,10 @@
 
     const flat_binder_object *fb = reply.readObject(false);
     ASSERT_TRUE(fb != NULL);
-    EXPECT_EQ(fb->type, BINDER_TYPE_HANDLE);
-    EXPECT_EQ(ProcessState::self()->getStrongProxyForHandle(fb->handle), m_server);
-    EXPECT_EQ(fb->cookie, (binder_uintptr_t)0);
-    EXPECT_EQ(fb->binder >> 32, (binder_uintptr_t)0);
+    EXPECT_EQ(BINDER_TYPE_HANDLE, fb->type);
+    EXPECT_EQ(m_server, ProcessState::self()->getStrongProxyForHandle(fb->handle));
+    EXPECT_EQ((binder_uintptr_t)0, fb->cookie);
+    EXPECT_EQ((uint64_t)0, (uint64_t)fb->binder >> 32);
 }
 
 TEST_F(BinderLibTest, FreedBinder) {
diff --git a/libs/gui/ConsumerBase.cpp b/libs/gui/ConsumerBase.cpp
index 3d36376..c2b10a9 100644
--- a/libs/gui/ConsumerBase.cpp
+++ b/libs/gui/ConsumerBase.cpp
@@ -106,7 +106,7 @@
 
     sp<FrameAvailableListener> listener;
     { // scope for the lock
-        Mutex::Autolock lock(mFrameAvailableMutex);
+        Mutex::Autolock lock(mMutex);
         listener = mFrameAvailableListener.promote();
     }
 
@@ -121,7 +121,7 @@
 
     sp<FrameAvailableListener> listener;
     {
-        Mutex::Autolock lock(mFrameAvailableMutex);
+        Mutex::Autolock lock(mMutex);
         listener = mFrameAvailableListener.promote();
     }
 
@@ -185,7 +185,7 @@
 void ConsumerBase::setFrameAvailableListener(
         const wp<FrameAvailableListener>& listener) {
     CB_LOGV("setFrameAvailableListener");
-    Mutex::Autolock lock(mFrameAvailableMutex);
+    Mutex::Autolock lock(mMutex);
     mFrameAvailableListener = listener;
 }
 
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 2305206..022b416 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -1947,6 +1947,7 @@
     mCurrentState.barrierLayer = nullptr;
     mCurrentState.frameNumber = 0;
     mCurrentState.modified = false;
+    ALOGE("Deferred transaction");
 }
 
 void Layer::deferTransactionUntil(const sp<IBinder>& barrierHandle,
@@ -2682,7 +2683,7 @@
         // for in the transform. We need to mirror this scaling in child surfaces
         // or we will break the contract where WM can treat child surfaces as
         // pixels in the parent surface.
-        if (p->isFixedSize() && p->mActiveBuffer != nullptr) {
+        if (p->isFixedSize()) {
             int bufferWidth;
             int bufferHeight;
             if ((p->mCurrentTransform & NATIVE_WINDOW_TRANSFORM_ROT_90) == 0) {
diff --git a/services/surfaceflinger/SurfaceFlingerConsumer.cpp b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
index abc8fde..9babeef 100644
--- a/services/surfaceflinger/SurfaceFlingerConsumer.cpp
+++ b/services/surfaceflinger/SurfaceFlingerConsumer.cpp
@@ -240,15 +240,10 @@
 }
 
 void SurfaceFlingerConsumer::onSidebandStreamChanged() {
-    FrameAvailableListener* unsafeFrameAvailableListener = nullptr;
-    {
-        Mutex::Autolock lock(mFrameAvailableMutex);
-        unsafeFrameAvailableListener = mFrameAvailableListener.unsafe_get();
-    }
     sp<ContentsChangedListener> listener;
     {   // scope for the lock
         Mutex::Autolock lock(mMutex);
-        ALOG_ASSERT(unsafeFrameAvailableListener == mContentsChangedListener.unsafe_get());
+        ALOG_ASSERT(mFrameAvailableListener.unsafe_get() == mContentsChangedListener.unsafe_get());
         listener = mContentsChangedListener.promote();
     }