linux-kernel - Re: [PATCH 1/3] PM: Introduce new top level suspend and hibernation callbacks (rev. 8)

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Date:	Mon, 14 Apr 2008 09:37:07 +0200
From:	Oliver Neukum <oliver@...kum.org>
To:	benh@...nel.crashing.org
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, Greg KH <greg@...ah.com>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Alan Stern <stern@...land.harvard.edu>,
	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>,
	Nigel Cunningham <ncunningham@...a.org.au>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 1/3] PM: Introduce new top level suspend and hibernation callbacks (rev. 8)

Am Montag, 14. April 2008 09:23:36 schrieb Benjamin Herrenschmidt:
> 
> On Mon, 2008-04-14 at 08:43 +0200, Oliver Neukum wrote:

> > If you want to request firmware in a PM callback, which makes a
> > certain
> > sense, as we should move to a comprehensive API, if we change the API
> > at all, we need a model with 3 callbacks.
> 
> No. At this pace, we'll find reasons to have 98213674 callbacks and will
> still not be happy.
> 
> Prepare() should be the right place to call request_firmware() and if
> that is a problem because of bugs in some USB things, then those bugs
> should be fixed.

This isn't a bug. USB simply needs to be able to register (and deregister)
children to be fully operative. You cannot expect a subsystem to work
while some core services are not available.

	Regards
		Oliver


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