linux-kernel - Re: cd/dvd inaccessible in 2.6.24-rc2

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Date:	Sat, 10 Nov 2007 16:13:01 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Will Trives <will@...vescon.com.au>, linux-kernel@...r.kernel.org,
	linux-ide@...r.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>,
	linux-acpi@...r.kernel.org
Subject: Re: cd/dvd inaccessible in 2.6.24-rc2

On Sat, 10 Nov 2007 23:05:53 +0000 Alan Cox <alan@...rguk.ukuu.org.uk> wrote:

> > > ata9.00: qc timeout (cmd 0xa0)
> > > ata9.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
> > > ata9.00: cmd a0/00:00:00:02:00/00:00:00:00:00/a0 tag 0 cdb 0x5a data 2
> > > in
> > >          res 51/54:03:00:02:00/00:00:00:00:00/a0 Emask 0x5 (timeout)
> > > ata9.00: status: { DRDY ERR }
> 
> Could be an IRQ/ACPI regression, and in fact to me it looks more like
> that, than an IDE one.

Drat.  Seems that once we break that sort of thing we never fix it again.

> Probably worth trying the various IRQ routing
> options and seeing if they help.

Yup.

Please, if you have time, bisect it down to the offending commit?

There's info at http://www.kernel.org/doc/local/git-quick.html which should
help.

Thanks.
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