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List:       freebsd-current
Subject:    Re: panic: don't do that, in ugen(4)
From:       Jay Cornwall <jay () evilrealms ! net>
Date:       2003-05-28 0:51:42
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On Wednesday 28 May 2003 00:06 am, Juli Mallett wrote:

> Running `quickcam' twice from:
> 	http://people.freebsd.org/~jmallett/qce-freebsd.tgz
>
> Yields the following loveliness:

[..]

This is the same issue another person (Mark Blackman) is seeing with the 
Speedtouch software. I submitted a patch to the kernel recently which 
alleviated the problem for me (and others), but Mark is still having problems 
(albeit slightly different since the patch) with ugen_set_interface panicing 
inside /sys/dev/usb/ugen.c.

I'll be looking into this either tomorrow or the next day, to try to work out 
how it's still occurring and fix it. If anyone else decides to take a look, 
it may help to see the patch recently committed to ugen.c:
 
http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/usb/ugen.c.diff?r1=1.69&r2=1.70&f=h

It's related to the way ugen treats device nodes since; since devfs was 
introduced into the kernel, there have been stricter rules on how the kernel 
can manipulate device nodes, and ugen.c is (apparently) still breaking these 
rules.

Cheers,
Jay

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