linux-kernel - Re: [PATCH V2] au1xmmc: dev_pm

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Date:	Mon, 3 Aug 2009 18:33:04 +0200
From:	Albin Tonnerre <albin.tonnerre@...e-electrons.com>
To:	Frans Pop <elendil@...net.nl>, "Rafael J. Wysocki" <rjw@...k.pl>
Cc:	linux-kernel@...r.kernel.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: Re: [PATCH V2] au1xmmc: dev_pm_ops conversion

On Sat, Jul 25, 2009, Frans Pop wrote:
> Yes, I see that in drivers/base/platform.c (legacy) .suspend resp. .resume
> also got called for those cases?
> Ouch :-(

This really looks like it's error-prone (I made this mistake for atmel_serial
and wouldn't have noticed if Frans hadn't told me), and AFAICS, for a number of
drivers we'll have suspend = freeze = poweroff and resume = thaw = restore.
Maybe putting something like this in pm.h would help ?

#define PM_OPS(name, suspend, resume) \
struct dev_pm_ops name = { \
	.suspend = suspend, \
	.resume = resume, \
	.freeze = suspend, \
	.thaw = resume, \
	.poweroff = suspend, \
	.restore = resume, \
};

Cheers,
-- 
Albin Tonnerre, Free Electrons
Kernel, drivers and embedded Linux development,
consulting, training and support.
http://free-electrons.com
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