Check for null mBlastBufferQueue

If there is a sync transaction, but blast is not enabled,
mNextDrawUseBLASTSyncTransaction will be true, but mBlastBufferQueue
will be null. This will cause a NPE when trying to call
mBlastBufferQueue.setNextTransaction

Test: Use sync transaction without blast
Fixes: 154527936
Change-Id: Ibff2de7fc7460f882acaceb0182c68ea4b05afb7

1 files changed, 3 insertions, 1 deletions

diff --git a/core/java/android/view/ViewRootImpl.java b/core/java/android/view/ViewRootImpl.java
index ed1edc3bd526..bcfc8c34231c 100644
--- a/core/java/android/view/ViewRootImpl.java
+++ b/core/java/android/view/ViewRootImpl.java
@@ -3769,7 +3769,9 @@ public final class ViewRootImpl implements ViewParent,
                 mNextReportConsumeBLAST = true;
                 mNextDrawUseBLASTSyncTransaction = false;
 
-                mBlastBufferQueue.setNextTransaction(mRtBLASTSyncTransaction);
+                if (mBlastBufferQueue != null) {
+                    mBlastBufferQueue.setNextTransaction(mRtBLASTSyncTransaction);
+                }
             }
             boolean canUseAsync = draw(fullRedrawNeeded);
             if (usingAsyncReport && !canUseAsync) {