usb的device id总在变化么？

作者: graydream

iSight firmware loader需要指定usb的device id作为参数。我写道udev rule里，但是每次启动device都变化

lsusb得到这个：

Bus 001 Device 010: ID 05ac:8501 Apple Computer, Inc. Built-in iSight [Micron]
Bus 001 Device 001: ID 0000:0000
Bus 005 Device 003: ID 05ac:1000 Apple Computer, Inc.
Bus 005 Device 001: ID 0000:0000
Bus 004 Device 003: ID 05ac:8240 Apple Computer, Inc. IR Receiver [build-in]
Bus 004 Device 001: ID 0000:0000
Bus 003 Device 006: ID 046d:c016 Logitech, Inc. M-UV69a Optical Wheel Mouse
Bus 003 Device 001: ID 0000:0000
Bus 002 Device 003: ID 05ac:021a Apple Computer, Inc.
Bus 002 Device 001: ID 0000:0000

第一行的Device每次启动都变。有没有办法不变