diff --git a/libhwcomposer/hwc_mdpcomp.cpp b/libhwcomposer/hwc_mdpcomp.cpp
index ba6cae7..0e11590 100644
--- a/libhwcomposer/hwc_mdpcomp.cpp
+++ b/libhwcomposer/hwc_mdpcomp.cpp
@@ -52,6 +52,7 @@
 
 void MDPComp::dump(android::String8& buf)
 {
+    Locker::Autolock _l(mMdpCompLock);
     dumpsys_log(buf,"HWC Map for Dpy: %s \n",
                 mDpy ? "\"EXTERNAL\"" : "\"PRIMARY\"");
     dumpsys_log(buf,"PREV_FRAME: layerCount:%2d    mdpCount:%2d \
@@ -756,6 +757,9 @@
                  __FUNCTION__);
         return 0;
     }
+
+    Locker::Autolock _l(mMdpCompLock);
+
     //reset old data
     mCurrentFrame.reset(numLayers);
 
@@ -894,6 +898,8 @@
         return false;
     }
 
+    Locker::Autolock _l(mMdpCompLock);
+
     /* reset Invalidator */
     if(idleInvalidator && !sIdleFallBack && mCurrentFrame.mdpCount)
         idleInvalidator->markForSleep();
@@ -1063,6 +1069,8 @@
         return false;
     }
 
+    Locker::Autolock _l(mMdpCompLock);
+
     /* reset Invalidator */
     if(idleInvalidator && !sIdleFallBack && mCurrentFrame.mdpCount)
         idleInvalidator->markForSleep();
diff --git a/libhwcomposer/hwc_mdpcomp.h b/libhwcomposer/hwc_mdpcomp.h
index 6e04918..898771d 100644
--- a/libhwcomposer/hwc_mdpcomp.h
+++ b/libhwcomposer/hwc_mdpcomp.h
@@ -173,6 +173,7 @@
     static IdleInvalidator *idleInvalidator;
     struct FrameInfo mCurrentFrame;
     struct LayerCache mCachedFrame;
+    mutable Locker mMdpCompLock;
 };
 
 class MDPCompLowRes : public MDPComp {