linux-kernel - Re: Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume, COMRESET failed

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Message-ID: <20120206161943.GA3926@google.com>
Date:	Mon, 6 Feb 2012 08:19:43 -0800
From:	Tejun Heo <tj@...nel.org>
To:	Lin Ming <ming.m.lin@...el.com>
Cc:	Norbert Preining <preining@...ic.at>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, jeff@...zik.org,
	"stern@...land.harvard.edu >> Alan Stern" <stern@...land.harvard.edu>,
	linux-ide@...r.kernel.org,
	Linux PM mailing list <linux-pm@...r.kernel.org>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Jian Peng <jipeng2005@...il.com>
Subject: Re: Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume,
 COMRESET failed

Hello,

(cc'ing Jian Peng, hi)

On Mon, Feb 06, 2012 at 12:42:56PM +0800, Lin Ming wrote:
> On Mon, 2012-02-06 at 12:15 +0900, Norbert Preining wrote:
> > On Mo, 06 Feb 2012, Lin Ming wrote:
> > > Only this patch on top of HEAD *without* reverting 7faa33da9b7.
> > 
> > Works. Am I right that it differs from 7faa33da9b7 only in that
> > the later also changes:
> 
> Right.
> 
> Tejun,
> 
> This regression is caused by 7faa33da9b7(ahci: start engine only during
> soft/hard resets).
> 
> But I can't reproduce it.
> 
> What's your guess?

Urgh.... yeah, following standard can sometimes be silly thing to do.
Jian, I think we'll have to add a flag for your controller and revert
to the original behavior for others.  How can your controller be
distinguished?

Thanks.

-- 
tejun
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