linux-kernel - Re: [RFC][PATCH] PM / Runtime: Add sysfs switch for disabling device run-time PM

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Date:	Wed, 20 Jan 2010 21:55:36 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Greg KH <greg@...ah.com>
Cc:	pm list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Matthew Garrett <mjg59@...f.ucam.org>,
	Alan Stern <stern@...land.harvard.edu>
Subject: Re: [RFC][PATCH] PM / Runtime: Add sysfs switch for disabling device run-time PM

On Wednesday 20 January 2010, Greg KH wrote:
> On Mon, Jan 18, 2010 at 01:29:55AM +0100, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rjw@...k.pl>
> > Subject: PM / Runtime: Add sysfs switch for disabling device run-time PM
> > 
> > Add new device sysfs attribute, power/runtime, allowing the user
> > space to block the run-time power management of the device.  If this
> > attribute is set to "disabled", the driver of the device won't be
> > able to enable run-time power management for it (without breaking the
> > rules).
> > 
> > Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
> > ---
> >  drivers/base/power/power.h   |    4 +
> >  drivers/base/power/runtime.c |  107 +++++++++++++++++++++++++++++++++----------
> >  drivers/base/power/sysfs.c   |   46 ++++++++++++++++++
> >  include/linux/pm.h           |    1 
> >  include/linux/pm_runtime.h   |   11 +---
> >  5 files changed, 139 insertions(+), 30 deletions(-)
> 
> You forgot to also add an entry into Documentation/ABI/ for when you
> add/change a sysfs file :)

There's no description for /sys/devices/.../power/wakeup in there too and
that one has been present for quite some time already.

I'd prefer adding them both in a separate patch if you don't mind.

Rafael
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