linux-kernel - Re: [PATCH] ata: Disabling the async PM for JMicron chip 363/361

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Message-ID: <20140901124023.GA3255@mtj.dyndns.org>
Date:	Mon, 1 Sep 2014 08:40:23 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Chuansheng Liu <chuansheng.liu@...el.com>
Cc:	MyMailClone@...nline.de, rjw@...ysocki.net, aaron.lu@...el.com,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ata: Disabling the async PM for JMicron chip 363/361

On Mon, Sep 01, 2014 at 08:38:03AM +0800, Chuansheng Liu wrote:
> After enabled the PM feature that supporting async noirq(76569faa62
> (PM / sleep: Asynchronous threads for resume_noirq)),
> Jay hit the system resuming issue, that one of the JMicron controller
> can not be powered up.
> 
> His device tree is like below:
>              +-1c.4-[02]--+-00.0  JMicron Technology Corp. JMB363 SATA/IDE Controller
>              |            \-00.1  JMicron Technology Corp. JMB363 SATA/IDE Controller
> 
> After investigation, we found the the Micron chip 363 included
> one SATA controller(0000:02:00.0) and one PATA controller(0000:02:00.1),
> these two controllers do not have parent-children relationship,
> but the PATA controller only can be powered on after the SATA controller
> has finished the powering on.
> 
> If we enabled the async noirq(), then the below error is hit during noirq
> phase:
> pata_jmicron 0000:02:00.1: Refused to change power state, currently in D3
> 
> Here for JMicron chip 363/361, we need forcedly to disable the async method.
> 
> Bug detail: https://bugzilla.kernel.org/show_bug.cgi?id=81551
> 
> Reported-by: Jay <MyMailClone@...nline.de>
> Signed-off-by: Chuansheng Liu <chuansheng.liu@...el.com>

Applied to libata/for-3.17-fixes.

Thanks.

-- 
tejun
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