Subject: Re: [PATCH 6/19] powerpc: avoid claiming some PCI bus

From: Benjamin Herrenschmidt <[email-masked]>
Date: Thu, 14 Dec 2006 15:55:15 +1100

On Thu, 2006-12-14 at 11:28 +0900, Ishizaki Kou wrote:
> Celleb has multiple PCI buses. Devices on some of those PCI buses
> require to assign resources by Linux.  This patch is for such buses
> not to claim resources, because claimed resource does not become a
> target for resource assign.

I don't fully understand what's going on here, and why you have this
insert_resource() hacks in the platform PCI code as well...

Care to explain ? Unfortunately, we haven't received the HW yet so I
can't have a look by myself and propose alternate patches just yet...

Cheers,
Ben.

> Signed-off-by: Kou Ishizaki <[email-masked]>
> ---
> 
> Index: linux-powerpc-git/arch/powerpc/kernel/pci_64.c
> diff -u linux-powerpc-git/arch/powerpc/kernel/pci_64.c:1.1.1.1 linux-powerpc-git/arch/powerpc/kernel/pci_64.c:1.3
> --- linux-powerpc-git/arch/powerpc/kernel/pci_64.c:1.1.1.1	Wed Dec  6 08:25:43 2006
> +++ linux-powerpc-git/arch/powerpc/kernel/pci_64.c	Tue Dec 12 15:37:56 2006
> @@ -249,8 +249,13 @@
>  	if (firmware_has_feature(FW_FEATURE_ISERIES))
>  		return;
>  
> -	list_for_each_entry(b, &pci_root_buses, node)
> -		pcibios_claim_one_bus(b);
> +	list_for_each_entry(b, &pci_root_buses, node) {
> +		if (machine_is(celleb) &&
> +		    ppc_md.pci_probe_mode(b) != PCI_PROBE_DEVTREE)
> +			;
> +		else
> +			pcibios_claim_one_bus(b);
> +	}
>  }
>  
>  static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
> _______________________________________________
> Linuxppc-dev mailing list
> [email-masked]
> https://ozlabs.org/mailman/listinfo/linuxppc-dev