linux-kernel - Re: SATA link power management issues

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Message-ID: <20150421153121.GD9455@htj.duckdns.org>
Date:	Tue, 21 Apr 2015 11:31:21 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Gabriele Mazzotta <gabriele.mzt@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	stripathi@....com
Subject: Re: SATA link power management issues

On Mon, Apr 20, 2015 at 10:02:12PM +0200, Gabriele Mazzotta wrote:
> On Sunday 22 February 2015 21:53:35 Gabriele Mazzotta wrote:
> > It seems that the following patch prevents errors when the policy is
> > changed. Could anybody explain why?

The device is generating a spurious PHY event after LPM state change
and the patch is ignoring the event once after state change.  It's a
bit too specific.  Maybe we should do this timeout-based - e.g. ignore
phy events for 1s after LPM state change.  Gabriele, would be
interested in making such changes?

Thanks.

-- 
tejun
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