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

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Message-Id: <1208143380.6958.105.camel@pasglop>
Date:	Mon, 14 Apr 2008 13:23:00 +1000
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	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>, Oliver Neukum <oliver@...kum.org>,
	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)


> To avoid breaking things (from the functional point of view) unnecessarily.
> 
> In short, I don't really see the difference between moving ->prepare() before
> the freezer and droppig the freezer, which I'm not going to do right now.

I believe the use of prepare for things like request_firmware etc... is
worth the effort of fixing the known breakage of not having the freezer
while preventing insertion of new devices (mostly USB). In fact, it
won't be such a big issue as the core should/will return an error from
attempting to add the device in that case.

Ben.


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