On Sat, 21 Apr 2012, Wang YanQing wrote: > On Fri, Apr 20, 2012 at 08:32:37PM -0400, Alan Stern wrote: > > In this particular case, it is guaranteed that the left USB port will > > always be numbered as X-1.1:1.0 and the right port as X-1.2:1.0, where > > the number X may change from one boot to another. But the -1.1:1.0 and > > -1.2:1.0 parts will always be the same. > > > > This is because X is the bus number, which is allowed to change. The > > -1.1:1.0 and -1.2:1.0 values are port, configuration, and interface > > numbers. They will never change, because they come from the hardware. > Yes, configuration and interface come from the hardware, > but I don't know where the port come from, at least I don't think the port > comes from the same hardware with the configuration and interface, do you > mean port come from the hub? Yes, it does. 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
