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Date: Sun, 19 Sep 2004 20:57:27 -0400
From: David Schultz <das@FreeBSD.ORG>
To: Nate Lawson <nate@root.org>
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	Warner Losh <imp@FreeBSD.ORG>, src-committers@FreeBSD.ORG,
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cc: cvs-src@FreeBSD.ORG
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cc: Warner Losh <imp@FreeBSD.ORG>
cc: cvs-all@FreeBSD.ORG
Subject: Re: cvs commit: src/sys/dev/fdc fdc.c fdc_isa.c fdc_pccard.c
	fdcvar.h
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On Sun, Sep 19, 2004, Nate Lawson wrote:
> David Schultz wrote:
> >On Tue, Sep 14, 2004, Warner Losh wrote:
> >
> >>imp         2004-09-14 07:06:49 UTC
> >>
> >> FreeBSD src repository
> >>
> >> Modified files:
> >>   sys/dev/fdc          fdc.c fdc_isa.c fdc_pccard.c fdcvar.h 
> >> Log:
> >> Checkpoint the fdc resource changes:
> >> 
> >> o Allow for up to 3 resource I/O ranges to be given for the floppy
> >>   controller, rather than just two that are allowed for now.
> >> o Make sure that we can work with either a base address of 0x3f0 or 
> >> 0x3f2.
> >> o Create new inline functions to access the YE DATA's unique BDCR 
> >> register.
> >> o Update pccard attachment to add the fd device.
> >> o Do some minor style(9) polishing.
> >
> >
> >Hmm...this causes my system to hang immediately before the point
> >where I would expect GEOM to report that it had tasted ad0.  Any
> >ideas what's going on?  Below is the resulting kernel message
> >buffer, truncated due to ata(4) verbosity.  This is with
> >bootverbose, geom.debugflags=7, and debug.fdc.debugflags=0xff.  If
> >you need any other information (e.g. ps output) please let me
> >know and I'll try to dig up a serial cable.
> 
> It's likely the geom probe of the floppy media.  [...]

Yep.  With this commit, fdc gets confused about whether there's a
disk in there or not, which causes it to deadlock against the
g_event thread.  I've been discussing this with phk and Warner,
and I believe Warner is working on the problem.  Thanks for the hints.