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

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

[Ishizaki Kou]

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.

Signed-off-by: Kou Ishizaki <kou.ishizaki@toshiba.co.jp>
---

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)

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

[Benjamin Herrenschmidt]

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 <kou.ishizaki@toshiba.co.jp>
> ---
> 
> 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
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev