diff --git a/libgralloc/alloc_controller.cpp b/libgralloc/alloc_controller.cpp
index a69e6ee..1702336 100644
--- a/libgralloc/alloc_controller.cpp
+++ b/libgralloc/alloc_controller.cpp
@@ -271,7 +271,12 @@
 //-------------- IonController-----------------------//
 IonController::IonController()
 {
-    mIonAlloc = new IonAlloc();
+    allocateIonMem();
+}
+
+void IonController::allocateIonMem()
+{
+   mIonAlloc = new IonAlloc();
 }
 
 int IonController::allocate(alloc_data& data, int usage)
diff --git a/libgralloc/alloc_controller.h b/libgralloc/alloc_controller.h
index 5fe81fa..f0b8ed9 100644
--- a/libgralloc/alloc_controller.h
+++ b/libgralloc/alloc_controller.h
@@ -65,6 +65,7 @@
 
     private:
     IonAlloc* mIonAlloc;
+    void allocateIonMem();
 
 };
 } //end namespace gralloc
diff --git a/libgralloc/gralloc.cpp b/libgralloc/gralloc.cpp
index 6b41ce6..c1c61aa 100644
--- a/libgralloc/gralloc.cpp
+++ b/libgralloc/gralloc.cpp
@@ -105,6 +105,9 @@
         gpu_context_t *dev;
         IAllocController* alloc_ctrl = IAllocController::getInstance();
         dev = new gpu_context_t(m, alloc_ctrl);
+        if(!dev)
+            return status;
+
         *device = &dev->common;
         status = 0;
     } else {
diff --git a/libhwcomposer/hwc_copybit.cpp b/libhwcomposer/hwc_copybit.cpp
index d7afa19..f379cf8 100644
--- a/libhwcomposer/hwc_copybit.cpp
+++ b/libhwcomposer/hwc_copybit.cpp
@@ -811,7 +811,7 @@
 }
 
 CopyBit::CopyBit(hwc_context_t *ctx, const int& dpy) : mIsModeOn(false),
-        mCopyBitDraw(false), mCurRenderBufferIndex(0) {
+        mCopyBitDraw(false), mCurRenderBufferIndex(0), mEngine(0) {
 
     getBufferSizeAndDimensions(ctx->dpyAttr[dpy].xres,
             ctx->dpyAttr[dpy].yres,
diff --git a/liboverlay/overlay.cpp b/liboverlay/overlay.cpp
index d53b46d..c637e23 100644
--- a/liboverlay/overlay.cpp
+++ b/liboverlay/overlay.cpp
@@ -283,14 +283,13 @@
 
 bool Overlay::commit(utils::eDest dest) {
     bool ret = false;
-    int index = (int)dest;
-    validate(index);
+    validate((int)dest);
 
-    if(mPipeBook[index].mPipe->commit()) {
+    if(mPipeBook[dest].mPipe->commit()) {
         ret = true;
         PipeBook::setUse((int)dest);
     } else {
-        int dpy = mPipeBook[index].mDisplay;
+        int dpy = mPipeBook[dest].mDisplay;
         for(int i = 0; i < PipeBook::NUM_PIPES; i++) {
             if (mPipeBook[i].mDisplay == dpy) {
                 PipeBook::resetAllocation(i);
@@ -303,52 +302,46 @@
 
 bool Overlay::queueBuffer(int fd, uint32_t offset,
         utils::eDest dest) {
-    int index = (int)dest;
     bool ret = false;
-    validate(index);
+    validate((int)dest);
     //Queue only if commit() has succeeded (and the bit set)
     if(PipeBook::isUsed((int)dest)) {
-        ret = mPipeBook[index].mPipe->queueBuffer(fd, offset);
+        ret = mPipeBook[dest].mPipe->queueBuffer(fd, offset);
     }
     return ret;
 }
 
 void Overlay::setCrop(const utils::Dim& d,
         utils::eDest dest) {
-    int index = (int)dest;
-    validate(index);
-    mPipeBook[index].mPipe->setCrop(d);
+    validate((int)dest);
+    mPipeBook[dest].mPipe->setCrop(d);
 }
 
 void Overlay::setColor(const uint32_t color,
         utils::eDest dest) {
-    int index = (int)dest;
-    validate(index);
-    mPipeBook[index].mPipe->setColor(color);
+    validate((int)dest);
+    mPipeBook[dest].mPipe->setColor(color);
 }
 
 void Overlay::setPosition(const utils::Dim& d,
         utils::eDest dest) {
-    int index = (int)dest;
-    validate(index);
-    mPipeBook[index].mPipe->setPosition(d);
+    validate((int)dest);
+    mPipeBook[dest].mPipe->setPosition(d);
 }
 
 void Overlay::setTransform(const int orient,
         utils::eDest dest) {
-    int index = (int)dest;
-    validate(index);
+    validate((int)dest);
 
     utils::eTransform transform =
             static_cast<utils::eTransform>(orient);
-    mPipeBook[index].mPipe->setTransform(transform);
+    mPipeBook[dest].mPipe->setTransform(transform);
 
 }
 
 void Overlay::setSource(const utils::PipeArgs args,
         utils::eDest dest) {
-    int index = (int)dest;
-    validate(index);
+    validate((int)dest);
 
     PipeArgs newArgs(args);
     if(PipeBook::getPipeType(dest) == OV_MDP_PIPE_VG) {
@@ -363,13 +356,12 @@
         clearMdpFlags(newArgs.mdpFlags, OV_MDP_PIPE_FORCE_DMA);
     }
 
-    mPipeBook[index].mPipe->setSource(newArgs);
+    mPipeBook[dest].mPipe->setSource(newArgs);
 }
 
 void Overlay::setVisualParams(const MetaData_t& metadata, utils::eDest dest) {
-    int index = (int)dest;
-    validate(index);
-    mPipeBook[index].mPipe->setVisualParams(metadata);
+    validate((int)dest);
+    mPipeBook[dest].mPipe->setVisualParams(metadata);
 }
 
 Overlay* Overlay::getInstance() {
@@ -530,7 +522,7 @@
 
 bool Overlay::validateAndSet(const int& dpy, const int& fbFd) {
     GenericPipe* pipeArray[PipeBook::NUM_PIPES];
-    memset(&pipeArray, 0, sizeof(pipeArray));
+    memset(pipeArray, 0, sizeof(GenericPipe*)*(PipeBook::NUM_PIPES));
 
     int num = 0;
     for(int i = 0; i < PipeBook::NUM_PIPES; i++) {