linux-kernel - RE: [PATCH v2] PCI: PM: Move to D0 before calling pci_legacy_resume

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Message-ID: <PU1P153MB0169DECAA73E88F49B333CF7BF870@PU1P153MB0169.APCP153.PROD.OUTLOOK.COM>
Date:   Wed, 25 Sep 2019 22:25:00 +0000
From:   Dexuan Cui <decui@...rosoft.com>
To:     Dexuan Cui <decui@...rosoft.com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
CC:     "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "jackm@...lanox.com" <jackm@...lanox.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        "driverdev-devel@...uxdriverproject.org" 
        <driverdev-devel@...uxdriverproject.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Michael Kelley <mikelley@...rosoft.com>,
        Sasha Levin <Alexander.Levin@...rosoft.com>,
        "marcelo.cerri@...onical.com" <marcelo.cerri@...onical.com>,
        "olaf@...fle.de" <olaf@...fle.de>,
        "apw@...onical.com" <apw@...onical.com>,
        vkuznets <vkuznets@...hat.com>,
        "jasowang@...hat.com" <jasowang@...hat.com>
Subject: RE: [PATCH v2] PCI: PM: Move to D0 before calling
 pci_legacy_resume_early()

> From: devel <driverdev-devel-bounces@...uxdriverproject.org> On Behalf Of
> Dexuan Cui
> Sent: Monday, September 2, 2019 5:35 PM
> To: lorenzo.pieralisi@....com; bhelgaas@...gle.com;
> linux-pci@...r.kernel.org
> [..snipped...]
> > ---
> >
> > changes in v2:
> > 	Updated the changelog with more details.
> >
> >  drivers/pci/pci-driver.c | 7 ++++---
> >  1 file changed, 4 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
> > index 36dbe960306b..27dfc68db9e7 100644
> > --- a/drivers/pci/pci-driver.c
> > +++ b/drivers/pci/pci-driver.c
> > @@ -1074,15 +1074,16 @@ static int pci_pm_thaw_noirq(struct device
> *dev)
> >  			return error;
> >  	}
> >
> > -	if (pci_has_legacy_pm_support(pci_dev))
> > -		return pci_legacy_resume_early(dev);
> > -
> >  	/*
> >  	 * pci_restore_state() requires the device to be in D0 (because of MSI
> >  	 * restoration among other things), so force it into D0 in case the
> >  	 * driver's "freeze" callbacks put it into a low-power state directly.
> >  	 */
> >  	pci_set_power_state(pci_dev, PCI_D0);
> > +
> > +	if (pci_has_legacy_pm_support(pci_dev))
> > +		return pci_legacy_resume_early(dev);
> > +
> >  	pci_restore_state(pci_dev);
> >
> >  	if (drv && drv->pm && drv->pm->thaw_noirq)
> > --
> 
> Hi, Lorenzo, Bjorn,
> 
> Can you please take a look at the v2 ?
> 
> -- Dexuan

Hi Lorenzo, Bjorn, and all,
It looks this patch has not been acked by anyone.

Should I resend it? There is no change since v2.

Thanks,
-- Dexuan