On Wed, 18 Mar 2009 16:39:56 -0600 Alex Chiang <achiang@xxxxxx> 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?
--
To unsubscribe from this list: send the line "unsubscribe linux-pci" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
