On Thu, Mar 28, 2013 at 03:16:08PM -0400, Alan Stern wrote: > On Thu, 28 Mar 2013, Greg KH wrote: > > > On Thu, Mar 28, 2013 at 02:44:01PM -0400, Alan Stern wrote: > > > On Thu, 28 Mar 2013, Greg KH wrote: > > > > > > > > >>ls /sys/bus/usb/devices > > > > > >>1-0:1.0 2-0:1.0 port1-1 port1-1.3 port2-1.2 port2-2 port4-3 > > > > > >>1-1 2-1 port1-1.1 port1-1.4 port2-1.3 port3-1 port4-4 > > > > > >>1-1.1 2-1:1.0 port1-1.2 port1-1.5 port2-1.4 port3-2 usb1 > > > > > >>1-1:1.0 3-0:1.0 port1-1.2.1 port1-1.6 port2-1.5 port3-3 usb2 > > > > > >>1-1.1:1.0 3-1 port1-1.2.2 port1-2 port2-1.6 port3-4 usb3 > > > > > >>1-1.2 3-1:1.0 port1-1.2.3 port2-1 port2-1.7 port4-1 usb4 > > > > > >>1-1.2:1.0 4-0:1.0 port1-1.2.4 port2-1.1 port2-1.8 port4-2 > > > > > > > > > > > >What does it look like if you reverse the naming scheme (hub dev name + > > > > > >"port")? Doesn't that show the devices in a bit more logical way? > > > > > Hi Greg: > > > > > Do you mean e.g "port1.2-1", originally it's "port2-1.1". > > > > > 2-1 is hub dev name? > > > > > > > > No, I mean "2-1.port1" as these are the ports on the device, the device > > > > prefix should go first, right? > > > > > > > > > If right, how about root hub port and it should be port2.usb1? > > > > > > > > "usb1.port2" > > > > > > Is this a good idea? There are userspace programs that look through > > > the list of files in /sys/bus/usb/devices, and they probably expect > > > filenames beginning with a number or with 'usb' to be USB devices and > > > interfaces. > > > > What userspace programs? > > In the past I have answered questions from people wanting to know how > to write a program that could go from bus & device numbers to paths in > sysfs. The answer was to look at all the links in /sys/bus/usb/devices > for names beginning with a digit or with "usb", eliminate those whose > names contain ':' as they are interfaces rather than devices, and then > check the busnum and devnum files in each of the remaining directories. > > Also, libusb/libusbx uses a similar scheme to search through the > entries in /sys/bus/usb/devices, looking for parent-child > relationships. Ok, then we can't put them in this class, it will have to be separate or things will break. Has anyone tried this patch with libusb? 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
