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List:       freebsd-current
Subject:    Re: USB ugen_set_interface issue (+ possible patch)
From:       Jay Cornwall <jay () evilrealms ! net>
Date:       2003-05-26 12:58:37
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On Sunday 25 May 2003 20:12 pm, Mark Blackman wrote:

> Thanks for the effort here, but using a -current from May 24,
> (patch committed on May 18), I'm still getting device
> panics of the same type when using modem_run (from pppoa). However,
> the modem_run gets a bit further and most of the upload/download
> operations succeed. The panic now occurs at BLOCK4 instead
> of immediately.

Hmm. I've had a thorough look into /sys/dev/usb/ugen.c, and I can't see how 
this panic could be occurring since the patch.

Firstly, could you try a more recent version of the Speedtouch software? The 
- -current port is only for 1.1b2, and some of the USB code has changed since. 
You can download the most recent version from http://speedtouch.sf.net/.

In order to help me trace the panic, could you also try to obtain a core dump 
from the kernel, and a backtrace to the panic from the dump? A short guide on 
doing this is given here:
  http://www.onlamp.com/pub/a/bsd/2002/03/21/Big_Scary_Daemons.html
  http://www.onlamp.com/pub/a/bsd/2002/04/04/Big_Scary_Daemons.html

If you can send me the backtrace (the 'where' output of kgdb), it will greatly 
help in finding the cause of the problem. If you need help in getting a 
backtrace, feel free to mail me privately and I'll explain it step by step. 
(I can't reproduce the panic on my system, unfortunately)

Cheers,
Jay

- -- 
http://www.evilrealms.net/ - Systems Administrator & Developer
http://www.ic.ac.uk/ - Imperial College, 2nd year CS student
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