linux-kernel - Re: [PATCH] x86_64: don't need set default res if only have one root bus

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Date:	Sat, 12 Apr 2008 00:54:01 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	yhlu.kernel@...il.com
Cc:	Ingo Molnar <mingo@...e.hu>,
	kernel list <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] x86_64: don't need set default res if only have one root bus

On Saturday, 12 of April 2008, Yinghai Lu wrote:
> only one root bus, don't need to split that root resources.

This patch fixes the issue described at
http://lkml.org/lkml/2008/4/10/304 and in the following thread for me.

> Signed-off-by: Yinghai Lu <yhlu.kernel@...il.com>

Tested-by: Rafael J. Wysocki <rjw@...k.pl>
 
> diff --git a/arch/x86/pci/k8-bus_64.c b/arch/x86/pci/k8-bus_64.c
> index 7ed7f51..c433982 100644
> --- a/arch/x86/pci/k8-bus_64.c
> +++ b/arch/x86/pci/k8-bus_64.c
> @@ -69,7 +69,8 @@ void set_pci_bus_resources_arch_default(struct pci_bus *b)
>  	int j;
>  	struct pci_root_info *info;
>  
> -	if (!pci_root_num)
> +	/* if only one root bus, don't need to anything */
> +	if (pci_root_num < 2)
>  		return;
>  
>  	for (i = 0; i < pci_root_num; i++) {
> 
> 

Thanks,
Rafael
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