linux-kernel - Re: [PATCH v2.6.38-rc7] Revert "libata: ahci_start

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Date:	Fri, 20 May 2011 14:25:59 -0400
From:	Valdis.Kletnieks@...edu
To:	Jian Peng <jipeng2005@...il.com>
Cc:	Tejun Heo <tj@...nel.org>, "Rafael J. Wysocki" <rjw@...k.pl>,
	Jeff Garzik <jgarzik@...ox.com>,
	Michael Leun <lkml20100708@...ton.leun.net>,
	linux-ide@...r.kernel.org,
	Linux PM mailing list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2.6.38-rc7] Revert "libata: ahci_start_engine compliant to AHCI spec"

On Fri, 20 May 2011 10:02:56 PDT, Jian Peng said:
> --20cf307f38f6d842a904a3b81730

> You are both right that adding this majic 5ms delay at this place should not
> be the final solution.
> 
> If this magic 5ms delay works on other affected systems, I plan to post a
> new patch that inside ahci_start_engine(), still perform same check, and
> show warning message if failed, but will set a flag, then still set START
> bit, and if there is such failure flag, add 5ms delay.
> 
> Valdis, could you apply the following patch and retest it?

I should be able to do that this weekend.  To clarify - should this be with the
problem commit 270dac35c26433d06a89150c51e75ca0181ca7e4 applied, or reverted?


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