On Fri, Jul 12, 2013 at 04:49:54AM +0000, WangChen wrote: > Hi, Oliver, > Regarding skel_write, I see your current desgin only refuse its > execution when> WRITES_IN_FLIGHT are on the fly, but this is not > blocking IO due to write() will not wait before callback returns, > right? Do you think it's unnecessary to support blocking IO on write > or any special reason else? Take a step back. What type of USB driver do you wish to write? For what type of device? That will answer usually all of these types of questions as the userspace api for the device will dictate this type of thing. thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html