linux-kernel - Re: [PATCH 12/24] PCI, ia64: Register busn

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Date:	Tue, 28 Feb 2012 17:01:42 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Tony Luck <tony.luck@...el.com>,
	David Miller <davem@...emloft.net>, x86 <x86@...nel.org>,
	Dominik Brodowski <linux@...inikbrodowski.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arch@...r.kernel.org, Fenghua Yu <fenghua.yu@...el.com>,
	linux-ia64@...r.kernel.org
Subject: Re: [PATCH 12/24] PCI, ia64: Register busn_res for root buses

On Tue, Feb 28, 2012 at 3:07 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> Cc: Tony Luck <tony.luck@...el.com>
> Cc: Fenghua Yu <fenghua.yu@...el.com>
> Cc: linux-ia64@...r.kernel.org
> ---
>  arch/ia64/include/asm/pci.h |    1 +
>  arch/ia64/pci/pci.c         |    5 +++++
>  2 files changed, 6 insertions(+), 0 deletions(-)
>
> diff --git a/arch/ia64/include/asm/pci.h b/arch/ia64/include/asm/pci.h
> index b22e5f5..6e54220 100644
> --- a/arch/ia64/include/asm/pci.h
> +++ b/arch/ia64/include/asm/pci.h
> @@ -94,6 +94,7 @@ struct pci_controller {
>
>        unsigned int windows;
>        struct pci_window *window;
> +       struct resource busn;

Why do you add a new struct resource here?  Can't you just use the one
passed in from acpi_pci_root_add()?

>
>        void *platform_data;
>  };
> diff --git a/arch/ia64/pci/pci.c b/arch/ia64/pci/pci.c
> index d1ce320..b250f0f 100644
> --- a/arch/ia64/pci/pci.c
> +++ b/arch/ia64/pci/pci.c
> @@ -332,6 +332,7 @@ pci_acpi_scan_root(struct acpi_pci_root *root)
>        struct acpi_device *device = root->device;
>        int domain = root->segment;
>        int bus = root->secondary.start;
> +       int busmax = root->secondary.end;
>        struct pci_controller *controller;
>        unsigned int windows = 0;
>        struct pci_root_info info;
> @@ -372,6 +373,10 @@ pci_acpi_scan_root(struct acpi_pci_root *root)
>                acpi_walk_resources(device->handle, METHOD_NAME__CRS,
>                        add_window, &info);
>        }
> +       controller->busn.start = bus;
> +       controller->busn.end = busmax;
> +       conttoller->busn.flags = IORESOURCE_BUS;

Typo here - "conttoller" should be "controller".

> +       pci_add_resource(&info.resources, &controller->busn);
>        /*
>         * See arch/x86/pci/acpi.c.
>         * The desired pci bus might already be scanned in a quirk. We
> --
> 1.7.7
>
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