pktoss@xxxxxxxxx said: > >> I 'm imagining this driver having attributes in sysfs where a > >> userspace rogram can inform it about what ports the program wishes > >> o grab. > > Note that "ports" can be renumbered across reboots, so be > > careful about that. > Yes, I 've bumped into that once already. It is not a very big deal if > you don't reboot very often, but I guess I should see if there is any > way to have somewhat persistent naming for ports based on their > physical location. I doubt this is implementable with current > technology though. (At least in a straightforward way) Would somebody please say a bit more about this area. What "number" space are we discussing? Do ports get renumbered on booting because of timing issues (race conditions)? I guess I would expect that if a system had 2 USB host controllers./hubs on a PCI bus with one type X gizmo on each USB bus. Another possibility is that things get assigned numbers in the order they are plugged in and then get a new set of numbers based on probe order when the system is rebooted. I have a box with several serial (GPS) things. I had troubles until I added things like the following to udev rules: KERNEL=="ttyUSB*", KERNELS=="5-2:1.0", MODE="0666", SYMLINK+="gps4" -- These are my opinions, not necessarily my employer's. I hate spam. -- 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
