diff --git a/drivers/wdm/audio/backpln/portcls/dma_slave.cpp b/drivers/wdm/audio/backpln/portcls/dma_slave.cpp
index 4a0553b3ba8..40d5132f6f4 100644
--- a/drivers/wdm/audio/backpln/portcls/dma_slave.cpp
+++ b/drivers/wdm/audio/backpln/portcls/dma_slave.cpp
@@ -24,10 +24,7 @@ public:
         POOL_TYPE PoolType,
         ULONG Tag)
     {
-        PVOID P = ExAllocatePoolWithTag(PoolType, Size, Tag);
-        if (P)
-            RtlZeroMemory(P, Size);
-        return P;
+        return ExAllocatePoolWithTag(PoolType, Size, Tag);
     }
 
     STDMETHODIMP QueryInterface( REFIID InterfaceId, PVOID* Interface);
@@ -49,7 +46,24 @@ public:
         return m_Ref;
     }
     IMP_IDmaChannelInit;
-    CDmaChannelInit(IUnknown * OuterUnknown){}
+    CDmaChannelInit(IUnknown * OuterUnknown) :
+        m_pDeviceObject(nullptr),
+        m_pAdapter(nullptr),
+        m_DmaStarted(FALSE),
+        m_MapSize(0),
+        m_MapRegisterBase(nullptr),
+        m_LastTransferCount(0),
+        m_MaximumBufferSize(0),
+        m_MaxMapRegisters(0),
+        m_AllocatedBufferSize(0),
+        m_BufferSize(0),
+        m_Address({0}),
+        m_Buffer(nullptr),
+        m_Mdl(nullptr),
+        m_WriteToDevice(FALSE),
+        m_Ref(0)
+    {
+    }
     virtual ~CDmaChannelInit(){}
 
 protected:
diff --git a/drivers/wdm/audio/backpln/portcls/pin_wavecyclic.cpp b/drivers/wdm/audio/backpln/portcls/pin_wavecyclic.cpp
index 56eba19a438..07451f6190a 100644
--- a/drivers/wdm/audio/backpln/portcls/pin_wavecyclic.cpp
+++ b/drivers/wdm/audio/backpln/portcls/pin_wavecyclic.cpp
@@ -25,10 +25,7 @@ public:
         POOL_TYPE PoolType,
         ULONG Tag)
     {
-        PVOID P = ExAllocatePoolWithTag(PoolType, Size, Tag);
-        if (P)
-            RtlZeroMemory(P, Size);
-        return P;
+        return ExAllocatePoolWithTag(PoolType, Size, Tag);
     }
 
     STDMETHODIMP QueryInterface( REFIID InterfaceId, PVOID* Interface);
@@ -51,7 +48,35 @@ public:
     }
     IMP_IPortPinWaveCyclic;
     IMP_IServiceSink;
-    CPortPinWaveCyclic(IUnknown *OuterUnknown){}
+    CPortPinWaveCyclic(IUnknown *OuterUnknown) :
+        m_Port(nullptr),
+        m_Filter(nullptr),
+        m_KsPinDescriptor(nullptr),
+        m_Miniport(nullptr),
+        m_ServiceGroup(nullptr),
+        m_DmaChannel(nullptr),
+        m_Stream(nullptr),
+        m_State(KSSTATE_STOP),
+        m_Format(nullptr),
+        m_ConnectDetails(nullptr),
+        m_CommonBuffer(nullptr),
+        m_CommonBufferSize(0),
+        m_CommonBufferOffset(0),
+        m_IrpQueue(nullptr),
+        m_FrameSize(0),
+        m_Capture(FALSE),
+        m_TotalPackets(0),
+        m_StopCount(0),
+        m_Position({0}),
+        m_AllocatorFraming({{0}}),
+        m_Descriptor(nullptr),
+        m_EventListLock(0),
+        m_EventList({nullptr}),
+        m_ResetState(KSRESET_BEGIN),
+        m_Delay(0),
+        m_Ref(0)
+    {
+    }
     virtual ~CPortPinWaveCyclic(){}
 
 protected: