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

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Message-Id: <200702120124.51180.rjw@sisk.pl>
Date:	Mon, 12 Feb 2007 01:24:50 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Alan <alan@...rguk.ukuu.org.uk>
Cc:	Pavel Machek <pavel@....cz>,
	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?

On Monday, 12 February 2007 01:28, Alan wrote:
> > +PM support:	Since Linux is used on many portable and desktop systems, your
> > +		driver is likely to be used on such a system and therefore it
> > +		should support basic power management by implementing, if
> > +		necessary, the .suspend and .resume methods used during the
> > +		system-wide suspend and resume transitions.  You should verify
> > +		that your driver correctly handles the suspend and resume, but
> > +		if you are unable to ensure that, please at least define the
> > +		.suspend method returning the -ENOSYS ("Function not
> > +		implemented") error.  Note, however, that in such a case your
> > +		submission is likely to be suspended and only resumed when the
> > +		driver correctly handles this feature.
> 
> I'd lose the last bit. Just end it at "error.", there are going to be
> people who produce good reasons not to handle suspend/resume.

OK, I will.
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