Question

I’m having a builddroot assembled busybox distribution running on my micro.
It all works well so far but I realized one thing. When I boot my box up and
I do an lsusb I see this:

# lsusb
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0409:005a NEC Corp. HighSpeed Hub
Bus 001 Device 003: ID 12d1:14ac Huawei Technologies Co., Ltd. 
Bus 001 Device 004: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x 

Composite Device
and I have following links:

ttyUSB0  ttyUSB1  ttyUSB2  ttyUSB3

buyt none of those links seem to go to Device 0004 but if I replug the
CP210x device, I get this:

# lsusb
Bus 001 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 0409:005a NEC Corp. HighSpeed Hub
Bus 001 Device 003: ID 12d1:14ac Huawei Technologies Co., Ltd. 
Bus 001 Device 005: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x 

Composite Device
and these links:

ttyUSB0  ttyUSB1  ttyUSB2  ttyUSB3  ttyUSB4

and now ttyUSB4 is linking to my Device 005 why do I need to replug my
device in order to get a working symlink? That’s not what I want? 🙁
How can I fix this? The cp210x module is compiled into the kernel (not
attached as a separate module) – any suggestions?

Answer 1

This for some reason just stop happening probably due to the fact that we’re only using one usb device now. Inodes would have been a solution but got never implemented in our system.