Messages in this thread | | | Date | Thu, 19 Mar 2009 02:27:35 -0700 | From | Andrew Morton <> | Subject | Re: [PATCH v4 06/12] PCI: Introduce pci_rescan_bus() |
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On Wed, 18 Mar 2009 16:39:56 -0600 Alex Chiang <achiang@hp.com> wrote:
> This API is used by the PCI core to rescan a bus and rediscover > newly added devices. > > Over time, it is expected that the various PCI hotplug drivers > will migrate to this interface and away from the old > pci_do_scan_bus() interface. > > ... > > @@ -1195,10 +1195,39 @@ struct pci_bus * __devinit pci_scan_bus_parented(struct device *parent, > EXPORT_SYMBOL(pci_scan_bus_parented); > > #ifdef CONFIG_HOTPLUG > +/** > + * pci_rescan_bus - scan a PCI bus for devices. > + * @bus: PCI bus to scan > + * > + * Scan a PCI bus and child buses for new devices, adds them, > + * and enables them. > + * > + * Returns the max number of subordinate bus discovered. > + */ > +unsigned int __devinit pci_rescan_bus(struct pci_bus *bus) > +{ > + unsigned int max; > + struct pci_dev *dev; > + > + max = pci_scan_child_bus(bus); > + list_for_each_entry(dev, &bus->devices, bus_list) > + if (dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || > + dev->hdr_type == PCI_HEADER_TYPE_CARDBUS) > + if (dev->subordinate) > + pci_bus_size_bridges(dev->subordinate); > + > + pci_bus_assign_resources(bus); > + pci_enable_bridges(bus); > + pci_bus_add_devices(bus); > + > + return max; > +} > + > EXPORT_SYMBOL(pci_add_new_bus); > EXPORT_SYMBOL(pci_scan_slot); > EXPORT_SYMBOL(pci_scan_bridge); > EXPORT_SYMBOL_GPL(pci_scan_child_bus); > +EXPORT_SYMBOL_GPL(pci_rescan_bus);
uhm, is there any rationale for the seemingly-random mixup of export types in this interface?
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