linux-kernel - Re: NAK new drivers without proper power management?

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Message-ID: <20070211194202.GC15445@elf.ucw.cz>
Date:	Sun, 11 Feb 2007 20:42:02 +0100
From:	Pavel Machek <pavel@....cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Arjan van de Ven <arjan@...radead.org>, nigel@...el.suspend2.net,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: NAK new drivers without proper power management?

Hi!

> > > > Can we start to NAK new drivers that don't have proper power management
> > > > implemented? There really is no excuse for writing a new driver and not
> > > > putting .suspend and .resume methods in anymore, is there?
> > > 
> > > to a large degree, a device driver that doesn't suspend is better than
> > > no device driver at all, right?
> > > now.. if you want to make the core warn about it, that's very fair
> > 
> > Well, driver that is broken on SMP is arguably better than no driver
> > at all, yet we'd probably avoid merging that. It would be nice to
> > start including suspend in 'must work' list...
> 
> What about this:
> 
> "If the device requires that, implement .suspend and .resume or at least
> define .suspend that will always return -ENOSYS (then people will know they
> have to unload the driver before the suspend).  Similarly, if you aren't sure
> whether or not the device requires .suspend and .resume, define .suspend that
> will always return -ENOSYS."

Sounds ok to me. Where should this text go?
Documentation/SubmittingDrivers ?

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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