当一个底层驱动调用了 IoCompleteRequest() 函数时，基本上所有设备栈相关 IRP 处理工

作都是在它那里完成的。包括 IRP->Flags 的一些标志的判断，对 APC 的处理，抛出

MULTIPLE_IRP_COMPLETE_REQUESTS 错误等。当它延设备栈一直调用驱动所安装的 CompleteRoutine

时，如果发现 STATUS_MORE_PROCESSING_REQUIRED 这个标志，则会停止向上继续回滚。这也是

为什么在 CompleteRoutine 中使用这个标志即可暂停 IRP 的原因。-When a driver to call the bottom of the IoCompleteRequest () function, basically all equipment related to IRP stack processing is completed in it there. Including the IRP->　Flags to determine the number of signs on the APC handling error MULTIPLE_IRP_COMPLETE_REQUESTS out. Extension of equipment when it is driven by the call stack has been installed CompleteRoutine, if found STATUS_MORE_PROCESSING_REQUIRED logo, it will cease to continue to roll back up. That is why in CompleteRoutine can use the logo of the reasons for the suspension IRP.