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From: Tejun Heo <tj@kernel.org>
To: Gabriele Mazzotta <gabriele.mzt@gmail.com>
Cc: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
	stripathi@apm.com
Subject: Re: SATA link power management issues
Date: Tue, 21 Apr 2015 11:31:21 -0400	[thread overview]
Message-ID: <20150421153121.GD9455@htj.duckdns.org> (raw)
In-Reply-To: <2356903.cA2H5W8V2D@xps13>

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

  reply	other threads:[~2015-04-21 15:31 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-08 19:37 Gabriele Mazzotta
2015-01-09 22:00 ` Tejun Heo
2015-01-09 22:02   ` Tejun Heo
2015-01-09 22:05     ` Tejun Heo
2015-01-09 22:50     ` Gabriele Mazzotta
2015-01-12 13:16       ` Tejun Heo
2015-01-12 17:03         ` Gabriele Mazzotta
2015-01-12 17:07           ` Tejun Heo
2015-01-12 17:15             ` Gabriele Mazzotta
2015-01-09 22:40   ` Gabriele Mazzotta
     [not found] ` <CAOHikRDTgVWL7_WUS3Yvce01GyP5TcyRm8ojfAyTHLTZ7xiR7A@mail.gmail.com>
2015-01-12 17:16   ` Suman Tripathi
2015-01-12 20:26     ` Gabriele Mazzotta
     [not found]       ` <CAOHikRCp=m6tgKEmdg2pLj=XB2ugCGhj0rkeqCzF2+DPR8O9sw@mail.gmail.com>
2015-01-12 20:36         ` Gabriele Mazzotta
     [not found]           ` <CAOHikRC43JBMwCahBqT1znJLBnbr3Ui+szKhVQoK8cpfapTQyg@mail.gmail.com>
2015-01-12 20:54             ` Gabriele Mazzotta
2015-01-12 23:05 ` Gabriele Mazzotta
2015-02-22 20:53   ` Gabriele Mazzotta
2015-04-20 20:02     ` Gabriele Mazzotta
2015-04-21 15:31       ` Tejun Heo [this message]
2015-04-21 20:29         ` Gabriele Mazzotta
2015-04-21 20:56           ` Tejun Heo
2015-04-21 21:44             ` Gabriele Mazzotta
2015-04-24 21:44               ` Tejun Heo
2015-04-25  9:34                 ` [PATCH] libata: Ignore spurious PHY events on LPM policy change Gabriele Mazzotta
2015-04-25 15:37                   ` Tejun Heo
2015-04-25 17:57                     ` Gabriele Mazzotta

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