IopQueryLegacyBusInformation

NTSTATUS __stdcall IopQueryLegacyBusInformation(
        PDEVICE_OBJECT DeviceObject,
        _LPGUID InterfaceType,
        _INTERFACE_TYPE *BusNumber,
        UINT32 *a4){
  int v7; 
  UINT32 *v9; 
  _QWORD *DeviceNode; 
  __int64 v11; 
  _IO_STACK_LOCATION TopStackLocation; 
  UINT64 Information; 

  Information = 0i64;
  memset(&TopStackLocation, 0i64, sizeof(TopStackLocation));
  *(_WORD *)&TopStackLocation.MajorFunction = 6171;
  v7 = IopSynchronousCall(DeviceObject, &TopStackLocation, 3221225659i64, 0i64, &Information);
  if( v7 >= 0 )
  {
    v9 = (UINT32 *)Information;
    if( Information )
    {
      if( BusNumber )
        *BusNumber = *(_INTERFACE_TYPE *)(Information + 16);
      if( a4 )
        *a4 = v9[5];
      ExFreePoolWithTag(v9, 0);
    }
    else
    {
      DeviceNode = DeviceObject->DeviceObjectExtension->DeviceNode;
      if( DeviceNode )
      {
        v11 = DeviceNode[2];
        if( v11 )
        {
          if( *(_QWORD *)(v11 + 64) )
          {
            DbgPrint("*** IopQueryLegacyBusInformation - Driver %wZ returned STATUS_SUCCESS\n", v11 + 56);
            DbgPrint("    for IRP_MN_QUERY_LEGACY_BUS_INFORMATION, and a NULL POINTER.\n");
          }
        }
      }
    }
  }
  return v7;
}

Referenced by: