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Date:	Fri, 26 Jan 2007 11:59:05 -0800
From:	Andrew Morton <akpm@...l.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	David Brownell <david-b@...bell.net>, linux-kernel@...r.kernel.org,
	gregkh@...e.de
Subject: Re: [PATCH] Fix /sys/device/.../power/state regression

On Thu, 25 Jan 2007 05:00:09 +0000
Matthew Garrett <mjg59@...f.ucam.org> wrote:

> In 2.6.19, support for splitting driver suspend and resume callbacks 
> into interrupt and non-interrupt contexts was added. Unfortunately, this 
> broke /sys/device/.../power/state support for all devices. In the long 
> run, this should be obsoleted by power management support in the 
> individual drivers - however, in the case of network drivers (for 
> example), currently only three drivers implement any sort of useful 
> run-time power management.
> 
> This patch allows the bus driver to check whether a specific driver 
> requires the split. If not, the 2.6.18 functionality is restored. It 
> also alters feature-removals.txt to note that the deprecated 
> functionality should not be removed until a replacement actually exists.

That sounds like material for 2.6.20 as well as for 2.6.19.x.
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