On Fri, 29 Aug 2014, 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 > # Why do you want to bind your drive to usb-storage instead of uas? > My questions: > 1. is there anything I need to do, such as PCI driver, before bind to > usb-storage driver? Normally, if uas will bind to a device then usb-storage won't. You can change this by using a module paramter for usb-storage: modprobe usb-storage quirks=1759:5002:u (1759 and 5002 are the vendor and product IDs for this device.) > 2. I can check whether the usb device is bound to specific driver > through "cat /sys/kernel/debug/usb/devices". > is there any alternative way to do so? how about other drivers, > except usb, to let user know whether the binding/unbinding > successfully and which device is bound to which driver? ls -l /sys/bus/usb/devices/.../driver where you fill in the "..." with the path for the interface you are interested in, such as 1-4:1.0. Alternatively, ls /sys/bus/usb/drivers/.../ where you fill in the "..." with the name of the driver you are interested in. Alan Stern -- 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
