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

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Date:	Mon, 06 Feb 2012 12:42:56 +0800
From:	Lin Ming <ming.m.lin@...el.com>
To:	Norbert Preining <preining@...ic.at>
Cc:	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, jeff@...zik.org,
	Tejun Heo <tj@...nel.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>
Subject: Re: Regression 3.2 -> 3.3-rc1 10 sec hang at boot and resume,
 COMRESET failed

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?

Thanks,
Lin Ming

> @@ -2019,7 +2022,7 @@ static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
>                 ahci_power_down(ap);
>         else {
>                 ata_port_err(ap, "%s (%d)\n", emsg, rc);
> -               ata_port_freeze(ap);
> +               ahci_start_port(ap);
>         }
> 
> 
> Best wishes
> 
> Norbert
> ------------------------------------------------------------------------
> Norbert Preining            preining@...ist.ac.jp, logic.at, debian.org}
> JAIST, Japan                                 TeX Live & Debian Developer
> DSA: 0x09C5B094   fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
> ------------------------------------------------------------------------
> HOVE (adj.)
> Descriptive of the expression seen on the face of one person in the
> presence of another who clearly isn't going to stop talking for a very
> long time.
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