linux-kernel - Re: [ 094/136 ] e1000e: fix runtime power management transitions

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Date:	Mon, 20 May 2013 15:35:50 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	jeffrey.t.kirsher@...el.com
Cc:	Konstantin Khlebnikov <khlebnikov@...nvz.org>,
	"Allan, Bruce W" <bruce.w.allan@...el.com>,
	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Borislav Petkov <bp@...e.de>,
	Aaron Brown <aaron.f.brown@...el.com>
Subject: Re: [ 094/136 ] e1000e: fix runtime power management transitions

On Fri, 2013-05-17 at 22:40 -0700, Jeff Kirsher wrote:
> On Sat, 2013-05-18 at 09:35 +0400, Konstantin Khlebnikov wrote:
> > Steven Rostedt wrote:
> > > 3.6.11.4 stable review patch.
> > > If anyone has any objections, please let me know.
> > 
> > I don't think that 3.6.y needs this. That was fix for problem which appeared
> > in 3.8 after some changes in PCI power management code. Probably it depends
> > on these changes. If no one complains about problems we should leave it as is.
> 
> My thoughts are the same as Konstantin, but I would like Bruce Allan to
> weigh in on this since he is the e1000e maintainer.  Since it is late
> Friday night, Bruce probably won't see this until Monday to respond.

Any word on this? I'll wait till tomorrow to do the release. If I don't
hear anything, then I may just remove it.

Thanks,

-- Steve

> 
> > >
> > > ------------------
> > >
> > > From: Konstantin Khlebnikov<khlebnikov@...nvz.org>
> > >
> > > [ Upstream commit 66148babe728f3e00e13c56f6b0ecf325abd80da ]
> > >
> > > This patch removes redundant actions from driver and fixes its interaction
> > > with actions in pci-bus runtime power management code.
> > >
> > > It removes pci_save_state() from __e1000_shutdown() for normal adapters,
> > > PCI bus callbacks pci_pm_*() will do all this for us. Now __e1000_shutdown()
> > > switches to D3-state only quad-port adapters, because they needs quirk for
> > > clearing false-positive error from downsteam pci-e port.
> > >
> > > pci_save_state() now called after clearing bus-master bit, thus __e1000_resume()
> > > and e1000_io_slot_reset() must set it back after restoring configuration space.
> > >
> > > This patch set get_link_status before calling pm_runtime_put() in e1000_open()
> > > to allow e1000_idle() get real link status and schedule first runtime suspend.
> > >
> > > This patch also enables wakeup for device if management mode is enabled
> > > (like for WoL) as result pci_prepare_to_sleep() would setup wakeup without
> > > special actions like custom 'enable_wakeup' sign.
> > >
> > > Cc: Bruce Allan<bruce.w.allan@...el.com>
> > > Signed-off-by: Konstantin Khlebnikov<khlebnikov@...nvz.org>
> > > Acked-by: Rafael J. Wysocki<rafael.j.wysocki@...el.com>
> > > Tested-by: Borislav Petkov<bp@...e.de>
> > > Tested-by: Aaron Brown<aaron.f.brown@...el.com>
> > > Signed-off-by: Jeff Kirsher<jeffrey.t.kirsher@...el.com>
> > > Signed-off-by: Steven Rostedt<rostedt@...dmis.org>
> > 
> 
> 


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