On Friday 21 June 2013 09:12:38 Ming Lei wrote: > >> This should be enough since during remove path usbcore will wait for all > >> URBs' completion which is only triggered by tasklet, so once all URBs are > >> finished, the tasklet list has been empty already. > > > > No, usbcore only waits until the urb_list for each endpoint is empty. > > It doesn't keep track of the individual URB completions. Look at > > usb_hcd_flush_endpoint() and you'll see. > > But, if URBs still aren't completed after usb_disconnect(), it should be > bug of usbcore or driver, shouldn't it? A driver cannot know what caused the call to disconnect(). That includes driver unbind. Doing IO to a device that another driver may be bound to is certainly a bug. Nevertheless it usually works and it is desirable to keep that behavior. Regards Oliver -- 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
