linux-kernel - Re: [PATCH 1/5] e1000e: fix resuming from runtime-suspend

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Date:	Tue, 29 Jan 2013 02:11:23 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Konstantin Khlebnikov <khlebnikov@...nvz.org>
Cc:	linux-kernel@...r.kernel.org, e1000-devel@...ts.sourceforge.net,
	linux-pci@...r.kernel.org, Bruce Allan <bruce.w.allan@...el.com>,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH 1/5] e1000e: fix resuming from runtime-suspend

On Monday, January 28, 2013 04:05:33 PM Bjorn Helgaas wrote:
> [+cc Rafael, author of patch you cited]
> 
> On Fri, Jan 18, 2013 at 4:42 AM, Konstantin Khlebnikov
> <khlebnikov@...nvz.org> wrote:
> > Bug was introduced in commit 23606cf5d1192c2b17912cb2ef6e62f9b11de133
> > ("e1000e / PCI / PM: Add basic runtime PM support (rev. 4)") in v2.6.35
> >
> > Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>
> > Cc: e1000-devel@...ts.sourceforge.net
> > Cc: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> > Cc: Bruce Allan <bruce.w.allan@...el.com>
> > ---
> >  drivers/net/ethernet/intel/e1000e/netdev.c |   13 ++++++++-----
> >  1 file changed, 8 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c
> > index fbf75fd..2853c11 100644
> > --- a/drivers/net/ethernet/intel/e1000e/netdev.c
> > +++ b/drivers/net/ethernet/intel/e1000e/netdev.c
> > @@ -5691,14 +5691,17 @@ static int e1000_runtime_suspend(struct device *dev)
> >         struct pci_dev *pdev = to_pci_dev(dev);
> >         struct net_device *netdev = pci_get_drvdata(pdev);
> >         struct e1000_adapter *adapter = netdev_priv(netdev);
> > +       int retval;
> > +       bool wake;
> >
> > -       if (e1000e_pm_ready(adapter)) {
> > -               bool wake;
> > +       if (!e1000e_pm_ready(adapter))
> > +               return 0;
> >
> > -               __e1000_shutdown(pdev, &wake, true);
> > -       }
> > +       retval = __e1000_shutdown(pdev, &wake, true);
> > +       if (!retval)
> > +               e1000_power_off(pdev, true, wake);
> >
> > -       return 0;
> > +       return retval;
> >  }
> >
> >  static int e1000_idle(struct device *dev)
> >

I'd like the changelog to say what the bug is and how it is being fixed in
general terms.

Thanks,
Rafael


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