diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index 27dbc4e..21ffc06 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -740,15 +740,6 @@
     ALOGE_IF(err, "dequeueBuffer failed (%s)", strerror(-err));
     if (err == NO_ERROR) {
         sp<GraphicBuffer> backBuffer(GraphicBuffer::getSelf(out));
-        sp<Fence> fence(new Fence(fenceFd));
-
-        err = fence->waitForever("Surface::lock");
-        if (err != OK) {
-            ALOGE("Fence::wait failed (%s)", strerror(-err));
-            cancelBuffer(out, fenceFd);
-            return err;
-        }
-
         const Rect bounds(backBuffer->width, backBuffer->height);
 
         Region newDirtyRegion;
@@ -799,9 +790,9 @@
         }
 
         void* vaddr;
-        status_t res = backBuffer->lock(
+        status_t res = backBuffer->lockAsync(
                 GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_OFTEN,
-                newDirtyRegion.bounds(), &vaddr);
+                newDirtyRegion.bounds(), &vaddr, fenceFd);
 
         ALOGW_IF(res, "failed locking buffer (handle = %p)",
                 backBuffer->handle);
@@ -827,10 +818,11 @@
         return INVALID_OPERATION;
     }
 
-    status_t err = mLockedBuffer->unlock();
+    int fd = -1;
+    status_t err = mLockedBuffer->unlockAsync(&fd);
     ALOGE_IF(err, "failed unlocking buffer (%p)", mLockedBuffer->handle);
 
-    err = queueBuffer(mLockedBuffer.get(), -1);
+    err = queueBuffer(mLockedBuffer.get(), fd);
     ALOGE_IF(err, "queueBuffer (handle=%p) failed (%s)",
             mLockedBuffer->handle, strerror(-err));