linux-kernel - [PATCH 0/2] PM / Runtime: Rework the "runtime idle" helper routine (was: Re: [PATCH RFC] PM / Runtime: Rework the "runtime idle" helper routine)

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Message-ID: <2033252.LiVeuYIhnT@vostro.rjw.lan>
Date:	Sun, 02 Jun 2013 23:50:46 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Alan Stern <stern@...land.harvard.edu>,
	Linux PM list <linux-pm@...r.kernel.org>
Cc:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Linux PCI <linux-pci@...r.kernel.org>,
	Kevin Hilman <khilman@...aro.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Ulf Hansson <ulf.hansson@...aro.org>
Subject: [PATCH 0/2] PM / Runtime: Rework the "runtime idle" helper routine (was: Re: [PATCH RFC] PM / Runtime: Rework the "runtime idle" helper routine)

On Thursday, May 30, 2013 01:08:08 PM Alan Stern wrote:
> On Thu, 30 May 2013, Rafael J. Wysocki wrote:
> 
> > > Since you're making this change, wouldn't it be a good idea to adopt
> > > Mika's original suggestion and turn on the RPM_AUTO bit in rpmflags
> > > when the use_autosuspend flag is set?
> > 
> > I'm not actually sure.  It can be done, but I'd prefer to do that as a separate
> > change in any case.
> 
> That makes sense.
> 
> > > What about cases where the runtime-idle callback does
> > > rpm_schedule_suspend or rpm_request_suspend?  You'd have to make sure
> > > that it returns -EBUSY in such cases.  Did you audit for this?
> > 
> > As far as I could.
> > 
> > I'm not worried about the subsystems modified by this patch, because the
> > functionality there won't change (except for PCI, that is).
> 
> Right.  The subsystems that _aren't_ modified are the ones to worry 
> about -- like the USB callback.  They are the ones where the behavior 
> might change.

OK, this time I think I've caught all of them. :-)

I've retained the ACKs and Reviewed-by tags in [1/2], because it only makes
more changes in addition to the previously ACKed ones.  The PCI changeset
has been updated and [2/2] is the documentation update.

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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