Hello All,

I have a problem I cannot solve for a time.

I receive this when I unplug the device:
unregister_netdevice: waiting for eth1 to become free. Usage count = 1

My kernel is: 3.0
Used drivers: usbnet and GobiNet

I know this is a old bug, but I found nothing useful.

I checked the kernel source code and I do not know what there is a reference on the interface means. So, in short any good idea is nice which can help me to understand what is happening. And finally find solution.
Who can I guess out who is use the device yet?
And anyway what mean there is some reference to this device?

(comment out the reference number checking is not a solution, because it can cause other problem later)

It is interesting I get this not too frequently, but it simple makes my system is instable.

Tamas

In kernel, there is a usage count each device. If a module use it, the count is increased.
Yes, the system isn't stable if the device is focused to release when the count isn't zero.

Thanks. As I noticed it is a really general problem,
I mean lots of reason can be.

I noticed which module is responsible for this in my case.
I have a led device which is triggered by the net device.

In some special cases (I do not know why) there is a interrupt in a mux
and a dead lock comes.

I would like to ask something else:
how can cause such problem a interrupt?
I mean how can I guess out what happens the thread which locked one function and received a interrupt?
Why does not the control go back?

Too dependant on the code. In general, code review could help it.