- information about USB interfaces must be available. One device contains
- the device node, the other device contains the interface data. Both
- devices are at the same level in sysfs (siblings) and one can't access
- the other. The device node created directly by the usbdev is the parent
- device of the interface and therefore easily accessible from the interface
- event.
-
- This option provides backward compatibility if needed.
+ information about USB interfaces must be available. One device
+ contains the device node, the other device contains the interface
+ data. Both devices are at the same level in sysfs (siblings) and one
+ can't access the other. The device node created directly by the
+ usb device is the parent device of the interface and therefore
+ easily accessible from the interface event.
+
+ This option provides backward compatibility for libusb device
+ nodes (lsusb) when usbfs is not used, and the following udev rule
+ doesn't exist:
+ SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", \
+ NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}", MODE="0644"