On Fri, Aug 29, 2014 at 11:18:39AM +0800, vichy wrote: > hi all: > I have read the article below and try to do the same operation on my device. > http://lwn.net/Articles/143397/ > > My environment: > 1. my kernel is 3.16 > 2. device descriptor is attached. > 3. below are my operation logs: > # echo -n "4-2:1.0" > /sys/bus/usb/drivers/uas/unbind > # echo -n "4-2:1.0" > /sys/bus/usb/drivers/usb-storage/unbind > bash: echo: write error: No such device You unbound your device from two different drivers? Of course the second one doesn't work, it's not bound there :) See Alan's response for a better explanation of how to do this properly. 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