Am 04.02.2013 02:14, schrieb Greg KH:

So you are right in that your driver will wait for forever for a
disconnect() to happen, as it will never be called.  I don't understand
the problem that this is causing when it happens.  What's wrong with
udlfb that having the cpu suddently reset as the powerdown happened
without it knowing about it?

There is nothing wrong with that. I've just explained why a problem 
doesn't occur on shutdown but on disconnect (of the device).

Regards,

Alexander