linux-kernel - Re: [PATCH 1/3] PCI PM: Do not disable and enable bridges during suspend-resume

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Message-ID: <20090207094720.GA1507@ucw.cz>
Date:	Sat, 7 Feb 2009 10:50:42 +0100
From:	Pavel Machek <pavel@...e.cz>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux PCI <linux-pci@...r.kernel.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] PCI PM: Do not disable and enable bridges during
	suspend-resume

Hi!

> their standard config spaces are restored.  Fix this by not attempting
> to disable bridges during suspend and enable them during resume.

...

> Index: linux-2.6/drivers/pci/pci-driver.c
> ===================================================================
> --- linux-2.6.orig/drivers/pci/pci-driver.c
> +++ linux-2.6/drivers/pci/pci-driver.c
> @@ -428,16 +428,18 @@ static int pci_pm_default_resume(struct 
>  {
>  	pci_fixup_device(pci_fixup_resume, pci_dev);
>  
> -	if (!pci_is_bridge(pci_dev))
> -		pci_enable_wake(pci_dev, PCI_D0, false);
> +	if (pci_is_bridge(pci_dev))
> +		return 0;
>  
> +	pci_enable_wake(pci_dev, PCI_D0, false);
>  	return pci_pm_reenable_device(pci_dev);
>  }

Are you sure? This goes from doing reenable_device to not doing it for
bridges, seemingly contradicting changelog?
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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