PiControlGetRelatedDevice

INT64 __stdcall PiControlGetRelatedDevice(
        _PLUGPLAY_CONTROL_CLASS PnPControlClass,
        _PLUGPLAY_CONTROL_RELATED_DEVICE_DATA *RelatedData,
        UINT64 PnPControlDataLength,
        CHAR CallerMode){
  unsigned __int16 Length; 
  PWCHAR v7; 
  ULONG v8; 
  UINT64 v9; 
  int BufferForUserModeCaller; 
  int UserModeCallersCopy; 
  UINT64 AllocateDestination; 
  UINT64 AllocateDestinationa; 
  PWCHAR RelatedDeviceInstance; 
  UNICODE_STRING Destination; 
  UINT64 RelatedDeviceInstanceLength; 
  Length = RelatedData->TargetDeviceInstance.Length;
  Destination = 0i64;
  Destination.MaximumLength = Length;
  Destination.Length = Length;
  if( (unsigned __int16)(Length - 1) > 0x18Fu || (Length & 1) != 0 )
    return 3221225485i64;
  RelatedDeviceInstance = 0i64;
  Destination.Buffer = 0i64;
  v7 = RelatedData->RelatedDeviceInstance;
  if( v7 && (v8 = RelatedData->RelatedDeviceInstanceLength) != 0 )
    v9 = 2 * v8;
  else
    v9 = 0i64;
  LODWORD(RelatedDeviceInstanceLength) = v9;
  BufferForUserModeCaller = PiControlAllocateBufferForUserModeCaller(
                              (PVOID *)&RelatedDeviceInstance,
                              v9,
                              CallerMode,
                              v7);
  if( BufferForUserModeCaller >= 0 )
  {
    LODWORD(AllocateDestination) = 1;
    BufferForUserModeCaller = PiControlMakeUserModeCallersCopy(
                                (VOID **)&Destination.Buffer,
                                RelatedData->TargetDeviceInstance.Buffer,
                                Destination.Length,
                                2ui64,
                                CallerMode,
                                AllocateDestination);
    if( BufferForUserModeCaller >= 0 )
    {
      BufferForUserModeCaller = PiGetRelatedDevice(
                                  &Destination,
                                  RelatedDeviceInstance,
                                  &RelatedDeviceInstanceLength,
                                  RelatedData->Relation);
      if( RelatedDeviceInstance )
      {
        LODWORD(AllocateDestinationa) = 0;
        UserModeCallersCopy = PiControlMakeUserModeCallersCopy(
                                (VOID **)&RelatedData->RelatedDeviceInstance,
                                RelatedDeviceInstance,
                                2 * RelatedData->RelatedDeviceInstanceLength,
                                2ui64,
                                CallerMode,
                                AllocateDestinationa);
        if( UserModeCallersCopy < 0 )
          BufferForUserModeCaller = UserModeCallersCopy;
      }
      RelatedData->RelatedDeviceInstanceLength = (unsigned int)RelatedDeviceInstanceLength >> 1;
    }
  }
  PiControlFreeUserModeCallersBuffer(CallerMode, Destination.Buffer);
  PiControlFreeUserModeCallersBuffer(CallerMode, RelatedDeviceInstance);
  return(unsigned int)BufferForUserModeCaller;
}

Referenced by: