On Mon, Feb 27, 2012 at 7:09 PM, Yinghai Lu <yinghai@xxxxxxxxxx> wrote:
> Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
> Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
> Cc: Paul Mackerras <paulus@xxxxxxxxx>
> Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
> ---
> arch/powerpc/kernel/pci-common.c | 7 ++++++-
> 1 files changed, 6 insertions(+), 1 deletions(-)
>
> diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
> index 910b9de..ae5ae5f 100644
> --- a/arch/powerpc/kernel/pci-common.c
> +++ b/arch/powerpc/kernel/pci-common.c
> @@ -1660,6 +1660,8 @@ void __devinit pcibios_scan_phb(struct pci_controller *hose)
> bus->secondary = hose->first_busno;
> hose->bus = bus;
>
> + pci_bus_insert_busn_res(bus, hose->first_busno, hose->last_busno);
> +
> /* Get probe mode and perform scan */
> mode = PCI_PROBE_NORMAL;
> if (node && ppc_md.pci_probe_mode)
> @@ -1670,8 +1672,11 @@ void __devinit pcibios_scan_phb(struct pci_controller *hose)
> of_scan_bus(node, bus);
> }
>
> - if (mode == PCI_PROBE_NORMAL)
> + if (mode == PCI_PROBE_NORMAL) {
> + pci_bus_update_busn_res_end(bus, 255);
> hose->last_busno = bus->subordinate = pci_scan_child_bus(bus);
> + pci_bus_update_busn_res_end(bus, bus->subordinate);
> + }
There's a lot of powerpc code that does this:
bus_range = of_get_property(pcictrl, "bus-range", &len);
hose->first_busno = bus_range[0];
hose->last_busno = bus_range[1];
That *looks* like it is discovering the bus number aperture. Is it?
If it is, why are we using the largest bus number found by
pci_scan_child_bus() rather than "last_busno"?
Bjorn
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