On Sun, Jan 11, 2015 at 12:26:51AM +0800, vichy wrote: > hi all: > usually the usb_driver is matched by usb_device_id or usb_dynids. > But there is any of them above defined in usb fs driver. > if so, what is usb fs driver used for when registered in the usb_init > of core/usb.c? Look at /dev/usb/ for the device nodes that usbfs creates so that tools like 'lsusb' and libusb will work. hope this helps, 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