sf: Modify the order of acquiring locks in getVsyncPeriodFromHWCcb

CRs-Fixed: 3391004
Change-Id: Ib2a234ef1401cd7aa0873ee3be2b345b8862c410

1 files changed, 2 insertions, 2 deletions

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index bc19446747..af25be9fa2 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -2442,9 +2442,9 @@ nsecs_t SurfaceFlinger::getVsyncPeriodFromHWC() const {
 }
 
 nsecs_t SurfaceFlinger::getVsyncPeriodFromHWCcb() {
-    std::lock_guard<std::recursive_mutex> lockVsync(mVsyncLock);
-
     Mutex::Autolock lock(mStateLock);
+
+    std::lock_guard<std::recursive_mutex> lockVsync(mVsyncLock);
     auto display = getDefaultDisplayDeviceLocked();
     if (mNextVsyncSource) {
         display = mNextVsyncSource;