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From: jhandvil <jhandvil@tampabay.rr.com>
To: Bruce M Simpson <bms@spc.org>
Date: Sun, 11 Jul 2004 15:12:10 -0400
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cc: freebsd-current@freebsd.org
cc: Ivan Voras <ivoras@fer.hr>
Subject: Re: 5.2.1 p9 --> 5.2 current 20040708 upgrade ATA_IDENTIFY
	no	interrupt
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On Sunday 11 July 2004 02:29 pm, Bruce M Simpson wrote:
> On Sun, Jul 11, 2004 at 10:43:21AM -0400, jhandvil wrote:
> > > > ata0-master: FAILURE - ATA_IDENTIFY no interrupt
> > > > ata0-master: FAILURE - ATA_IDENTIFY no interrupt
> > > > Mounting root from ufs:/dev/ad0s1a
> > > > setrootbyname failed
> > > > ffs_mountroot: can't find rootvp
> > > > Root mount failed: 6
>
> This is a very, very similar situation to what I've just observed on
> several IBM ThinkPad T41 systems with the Panasonic UJDA755 CDRW module!
>
> Please post as much information about your hardware configuration as you
> can; please also see my recent posts to -mobile for descriptions of how
> to pull a backtrace in the situation where your machine faults and drops
> into the debugger without the ability to 'call doadump'.
>
> I now strongly suspect we have a bug in ata(4). I will backtrack through
> green@'s recent commits concerning atapicam as I think this may tell
> part of the story (he identified some other issues and suggested fixes,
> I have a hunch he is on a similar track).
>
> I'm in a debugging session now and will post further results of my findings
> on -mobile.

Excellent!  I added a panic immediately after the error in ata_completed so 
that I can perform the backtrace.  I will post the response to the group as 
soon as I rebuild the kernel and reboot.

Thanks,
Justin