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powerpc/PCI: register busn_res for root buses

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Add the host bridge bus number aperture to the resource list.
Like the MMIO and I/O port apertures, this is used when assigning
resources to hot-added devices or in the case of conflicts.

[bhelgaas: changelog]
CC: Paul Mackerras <paulus@samba.org>
CC: linuxppc-dev@lists.ozlabs.org
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yinghai Lu
2012-05-17 18:51:12 -07:00
committed by Bjorn Helgaas
parent 3f1b540d46
commit be8e60d8be
3 changed files with 13 additions and 7 deletions
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17
arch/powerpc/kernel/pci-common.c
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@@ -1637,6 +1637,11 @@ void __devinit pcibios_scan_phb(struct pci_controller *hose)
/* Wire up PHB bus resources */
pcibios_setup_phb_resources(hose, &resources);
hose->busn.start = hose->first_busno;
hose->busn.end = hose->last_busno;
hose->busn.flags = IORESOURCE_BUS;
pci_add_resource(&resources, &hose->busn);
/* Create an empty bus for the toplevel */
bus = pci_create_root_bus(hose->parent, hose->first_busno,
hose->ops, hose, &resources);
@@ -1646,7 +1651,6 @@ void __devinit pcibios_scan_phb(struct pci_controller *hose)
pci_free_resource_list(&resources);
return;
}
bus->busn_res.start = hose->first_busno;
hose->bus = bus;
/* Get probe mode and perform scan */
@@ -1654,13 +1658,14 @@ void __devinit pcibios_scan_phb(struct pci_controller *hose)
if (node && ppc_md.pci_probe_mode)
mode = ppc_md.pci_probe_mode(bus);
pr_debug(" probe mode: %d\n", mode);
if (mode == PCI_PROBE_DEVTREE) {
bus->busn_res.end = hose->last_busno;
if (mode == PCI_PROBE_DEVTREE)
of_scan_bus(node, bus);
}
if (mode == PCI_PROBE_NORMAL)
hose->last_busno = bus->busn_res.end = pci_scan_child_bus(bus);
if (mode == PCI_PROBE_NORMAL) {
pci_bus_update_busn_res_end(bus, 255);
hose->last_busno = pci_scan_child_bus(bus);
pci_bus_update_busn_res_end(bus, hose->last_busno);
}
/* Platform gets a chance to do some global fixups before
* we proceed to resource allocation