linux-kernel - Re: [PATCH 2/7] PCI PM: Check if the state has been saved before trying to restore it

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Message-Id: <1233712466.16867.134.camel@pasglop>
Date:	Wed, 04 Feb 2009 12:54:26 +1100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	pm list <linux-pm@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux PCI <linux-pci@...r.kernel.org>
Subject: Re: [PATCH 2/7] PCI PM: Check if the state has been saved before
 trying to restore it

On Wed, 2009-02-04 at 01:57 +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rjw@...k.pl>
> 
> Check if the standard configuration registers of a PCI device have
> been saved during suspend before trying to restore them during
> resume.
> 
> Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>

Acked-By: Benjamin Herrenschmidt <benh@...nel.crashing.org>


> ---
>  drivers/pci/pci.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> Index: linux-2.6/drivers/pci/pci.c
> ===================================================================
> --- linux-2.6.orig/drivers/pci/pci.c
> +++ linux-2.6/drivers/pci/pci.c
> @@ -1421,7 +1421,7 @@ int pci_restore_standard_config(struct p
>  	dev->current_state = PCI_D0;
>  
>   Restore:
> -	return pci_restore_state(dev);
> +	return dev->state_saved ? pci_restore_state(dev) : 0;
>  }
>  
>  /**

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