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Date: Sun, 25 Jan 2004 14:18:03 +0000
From: Michael McGoldrick <michael@mcgoldrick.org>
To: current@freebsd.org
Message-ID: <20040125141802.GA879@uriel.mcgoldrick.org>
References: <20040124133246.GA862@uriel.mcgoldrick.org>
	<20040124190618.GN64193@cnd.mcgill.ca>
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Subject: Re: Fatal trap 12 pcm / devfs related?
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This patch seems to work perfectly. Thanks!

On Sat, Jan 24, 2004 at 02:06:18PM -0500, Mathew Kanner wrote:
> On Jan 24, Michael McGoldrick wrote:
> > (kgdb) l *0xc051be9a
> > 0xc051be9a is in dsp_clone (/usr/src/sys/dev/sound/pcm/dsp.c:1096).
> > 1091            if (unit == -1 || unit >= devclass_get_maxunit(pcm_devclass))
> > 1092                    return;
> > 1093
> > 1094            pcm_dev = devclass_get_softc(pcm_devclass, unit);
> > 1095
> > 1096            SLIST_FOREACH(pcm_chan, &pcm_dev->channels, link) {
> > 1097
> > 1098                    switch(devtype) {
> > 1099                            case SND_DEV_DSP:
> > 1100                                    pdev = pcm_chan->dsp_devt;
> > (kgdb) 
> 
> 	Hello Michael,
> 	I'm not exactly sure why this is happening and I'm not really
> in a place to do debugging, but could you try sticking a
> 
> 	if (pcm_dev == NULL)
> 		return;
> 
> 	at line 1095 and try again.
> 
> 	Thanks,
> 	--Mat
> 	
> -- 
> 	sig machine broken
-- 
Michael McGoldrick: michael@mcgoldrick.org