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Date: Fri, 20 Feb 2009 15:52:55 +0000
From: Ed Maste <emaste@freebsd.org>
To: pluknet <pluknet@gmail.com>
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Cc: attilio@freebsd.org, freebsd-current@freebsd.org
Subject: Re: svn commit: r188743 - head/sys/dev/aac
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On Fri, Feb 20, 2009 at 09:14:35AM +0300, pluknet wrote:

> 2009/2/20 Ed Maste <emaste@freebsd.org>:
> >> Author: emaste
> >> Date: Wed Feb 18 01:36:20 2009
> >> New Revision: 188743
> >> URL: http://svn.freebsd.org/changeset/base/188743
> >>
> >> Log:
> >>   Use outbound message register 0 instead of mailbox 7 in
> >>   aac_{rx,rkt}_get_fwstatus, as done in Adaptec's vendor driver as well as
> >>   the Linux drivers.
> >>
> >>   Submitted by:   jkim, from Adaptec's driver
> >
> > This change to the aac(4) driver comes from Adaptec's vendor driver,
> > but it might break older controllers (Dell PERC 3, Adaptec 2200, etc.)
> > and/or controllers running with older firmware.
> >
> 
> Hi.
> 
> Can you describe a little more what is the purpose of this change?
 
Unfortunately I do not know the specifics, just that this is what's done
in Adaptec's driver.  There is some speculation it may be related to
command timeouts observed with the latest series of controllers.  In any
case the change is part of a larger project to sync the in-tree driver
with Adaptec's version.

I have one report so far -- a PERC3 running firmware 2.7-1 BUILD 3170
works with this change.

- Ed