linux-kernel - Re: [RFC][PATCH] PM: Introduce new top level suspend and hibernation callbacks (rev. 6)

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Message-Id: <200804021728.45823.oliver@neukum.org>
Date:	Wed, 2 Apr 2008 17:28:44 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	Nigel Cunningham <ncunningham@...a.org.au>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Greg KH <greg@...ah.com>, Len Brown <lenb@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Alexey Starikovskiy <astarikovskiy@...e.de>,
	David Brownell <david-b@...bell.net>,
	Pavel Machek <pavel@....cz>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [RFC][PATCH] PM: Introduce new top level suspend and hibernation callbacks (rev. 6)

Am Mittwoch, 2. April 2008 17:13:11 schrieb Alan Stern:
> Basically yes.  Subsystems and drivers are allowed to keep devices
> suspended if they were suspended before the system went to sleep.  
> Remember, the purpose of the resume method is to let drivers know that
> the system is now awake, not to force them to put their devices into a
> high-power state.

Well, sometimes it is exactly that what we desire, eg. as a side effect
of lsusb. Should the callbacks have different semantics depending on
the reason you call them? And how should that information be transferred?

	Regards
		Oliver
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