PnpQueryDeviceRelations

__int64 __fastcall PnpQueryDeviceRelations(
        _DEVICE_OBJECT *DeviceObject,
        int a2,
        int (__fastcall *a3)(_DEVICE_OBJECT *, _IRP *, void *),
        UINT64 *a4){
  __int64 v8; 
  _IO_STACK_LOCATION TopStackLocation; 

  memset(&TopStackLocation, 0i64, sizeof(TopStackLocation));
  *(_WORD *)&TopStackLocation.MajorFunction = 1819;
  LODWORD(TopStackLocation.Parameters.SecurityContext) = a2;
  return PnpSendIrp(DeviceObject, &TopStackLocation, v8, a3, a4);
}

Referenced by:

PiDcHandleCustomDeviceEvent
PiQueryDeviceRelations
PiQueryPowerRelations
PipEnumerateDevice
PnpProcessRelation