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Date:      Fri, 17 Jan 2003 13:34:42 +0000
From:      Josef Karthauser <joe@FreeBSD.org>
To:        Darren Pilgrim <dmp@pantherdragon.org>
Cc:        Anish Mistry <mistry.7@osu.edu>, freebsd-hackers@freebsd.org
Subject:   Re: USB hub detach causing panic in 4.7p3
Message-ID:  <20030117133442.GH91944@genius.tao.org.uk>
In-Reply-To: <3E246D91.50701@pantherdragon.org>
References:  <3E23F9A4.9030101@pantherdragon.org> <200301141003.16160.mistry.7@osu.edu> <3E246D91.50701@pantherdragon.org>

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On Tue, Jan 14, 2003 at 12:05:37PM -0800, Darren Pilgrim wrote:
> >
> >>I have a USB hub that's built into my Viewsonic PT775 monitor.  The hub=
=20
> >>probes during boot and post-boot attach as follows:
> >>
> >>When the hub is disconnected, whether by unplugging it or turning
> >>off the monitor, I get a panic in 4.7p3 if there are no devices=20
> >>connected to the hub's downstream ports.
> <mass snip>
> >
> >Would this PR be related?=20
> >http://www.freebsd.org/cgi/query-pr.cgi?pr=3Dports/45579
>=20
> I'm not sure?  I didn't have anything running, that I could tell, that=20
> would have had the uhub device open.  The machine was sitting idle at the=
=20
> login prompt.  If someone would like to point me at a list of what I need=
=20
> to do to produce useful debugging information, I'll gladly do so.
>=20

There are a number of brokenisms in the USB stack in -stable.  As to
whether they will get fixed or not is a matter of whether anyone has the
time to MFC the USB stack from -current or not.  It's much better over
there, and I've already merged the framework to make it easier to MFC,
but it is very unlikely that I will be attempting the work myself as I
don't use USB on -stable myself.

Joe
--=20
Josef Karthauser (joe@tao.org.uk)	       http://www.josef-k.net/
FreeBSD (cvs meister, admin and hacker)     http://www.uk.FreeBSD.org/
Physics Particle Theory (student)   http://www.pact.cpes.sussex.ac.uk/
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D An eclectic mix of fact an=
d theory. =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

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