linux-kernel - Re: [RFC][PATCH 2/4] PM: Change suspend code ordering

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Message-ID: <alpine.LFD.2.00.0903021246250.3111@localhost.localdomain>
Date:	Mon, 2 Mar 2009 12:48:00 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
cc:	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	Len Brown <lenb@...nel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Arve  Hjønnevåg <arve@...roid.com>,
	Alan Stern <stern@...land.harvard.edu>,
	Johannes Berg <johannes@...solutions.net>
Subject: Re: [RFC][PATCH 2/4] PM: Change suspend code ordering



On Sun, 1 Mar 2009, Rafael J. Wysocki wrote:
>
> From: Rafael J. Wysocki <rjw@...k.pl>
> 
> Change the ordering of the suspend core code so that the platform
> "prepare" callback is executed and the nonboot CPUs are disabled
> after calling device drivers' "late suspend" methods.

Ok, ack on this whole series, looks fine.

I'd like to see a 5/4 though:

> This change will allow us to rework the PCI PM core so that the power
> state of devices is changed in the "late" phase of suspend (and
> analogously in the "early" phase of resume)

.. doing this. Right now we have that hacky "avoid ACPI by doing a special 
limited form of pci_set_power_state() and pci_enable() in the 
early_resume. I'd love to see the actual PCI code cleanup too.

			Linus
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