linux-kernel - Re: [PATCH 1/6] ACPI/EC: Introduce STARTED/STOPPED flags to replace BLOCKED flag.

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Message-ID: <20141120213448.GB13221@node.dhcp.inet.fi>
Date:	Thu, 20 Nov 2014 23:34:48 +0200
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	"Zheng, Lv" <lv.zheng@...el.com>
Cc:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
	"Brown, Len" <len.brown@...el.com>, Lv Zheng <zetalog@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>
Subject: Re: [PATCH 1/6] ACPI/EC: Introduce STARTED/STOPPED flags to replace
 BLOCKED flag.

On Thu, Nov 20, 2014 at 02:34:12AM +0000, Zheng, Lv wrote:
> Hi,
> 
> > From: Kirill A. Shutemov [mailto:kirill@...temov.name]
> > Sent: Wednesday, November 19, 2014 8:16 PM
> > 
> > On Tue, Nov 18, 2014 at 10:20:11PM +0100, Rafael J. Wysocki wrote:
> > > On Tuesday, November 18, 2014 03:23:28 PM Kirill A. Shutemov wrote:
> > > > On Wed, Nov 05, 2014 at 02:52:36AM +0000, Zheng, Lv wrote:
> > >
> > > [cut]
> > >
> > > >
> > > > Here's lockdep warning I see on -next:
> > >
> > > Is patch [1/6] sufficient to trigger this or do you need all [1-4/6]?
> > 
> > I only saw it on -next. I've tried to apply patches directly on -rc5 and
> > don't see the warning. I don't have time for proper bisecting, sorry.
> 
> Also I want to know if there is a real dead lock issue triggered?

I didn't see system hung or something. The laptop is usable at least.

> I think we have worked the dead lock issue around to make it working even when the fix is not merged so that we can have other EC work proceeded.
> So maybe I only need to prevent the warning from being triggered at current situation.
> 
> Thanks and best regards
> -Lv
> --
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-- 
 Kirill A. Shutemov
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