(1)驱动中调用usb_unlink_urb( )或usb_kill_urb( )主动取消一个已经提交给usb控制器的URB 调用usb_unlink_urb( )之后,URB的status值为-104(ECONNRESET) 调用usb_kill_urb( )之后,URB的status值为-2(ENOENT) (2)当URB已经提交给某个usb设备,但该设备被remove了,硬件断开了,比如将模块从主机上拔掉,这种...
调用usb_unlink_urb( )之后,URB的status值为-104(ECONNRESET) 调用usb_kill_urb( )之后,URB的status值为-2(ENOENT) (2)当URB已经提交给某个usb设备,但该设备被remove了,硬件断开了,比如将模块从主机上拔掉,这种情况下URB的status字段就为-108(ESHUTDOWN) 下面举几个例子: 使用busybox microcom /dev/ttyUS...
usb_kill_urb()会彻底终止 urb 的生命周期,它通常在设备的disconnect()函数中被调用。 当urb生命结束时(处理完成或被解除链接),通过 urb结构体的 status成员可以获知其原因,如 0表示传输成功,-ENOENT 表示被 usb_kill_urb()杀死,-ECONNRESET表示被 usb_unlink_urb()杀死, -EPROTO 表示传输中发生了 bitstuff...
USB 请求块(USB request block,urb)是 USB 设备驱动中用来描述与 USB 设备通信所用的基本载体和核心数据结构,非常类似于网络设备驱动中的 sk_buff 结构体。 1 urb结构体 定义位于:include\linux\usb.h 1structurb {2/*private: usb core and host controller only fields in the urb*/3structkref kref;/*...
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Centella asiatica is claimed to have a neuroprotective effect; however, its ability to protect the cerebrum against damage in diabetes has never been ident
8. Clients make payment for balance and Ship the goods , Inform the tracking number and check the status for clients. 9. Order can be say "finish" when you receive the goods and satisfy with them . 10. Feedback to our about Qualit...
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The most effective, yet dramatic change would be to remove the waste discharge exemption status for agriculture altogether and transition the industry from a Waiver program to a permit system. This major reform could either occur at the state or federal level. Two other nonpoint pollution sources ...
很多人做抖音做不好呢,其实就是因为太着急了,才发了几条视频,就来问我,孟老师,为什么我破不了500播放啊?哎,这有什么好说的,我的账号刚起号的时候也是一样,我前几条视频不也就四五百的播放嘛,直到发了第6条才爆的呀。 所以说啊,做抖音不要着急,开始比完美更重要,坚持比创意更重要,加油! : 回复...