Re: [PATCH 06/11] pci: introduce pci_assign_unassigned_bridge_resources

Alex Chiang
2010-01-16T04:47:38Z

> +static void pdev_assign_resources_sorted(struct pci_dev *dev,
> + struct resource_list_x *fail_head)
> +{
> + struct resource *res;
> + struct resource_list head, *list, *tmp;
> + int idx;
> + u16 class = dev->class >> 8;
> +
> + head.next = NULL;
> +
> + /* Don't touch classless devices or host bridges or ioapics. */
> + if (class == PCI_CLASS_NOT_DEFINED || class == PCI_CLASS_BRIDGE_HOST)
> + return;
> +
> + /* Don't touch ioapic devices already enabled by firmware */
> + if (class == PCI_CLASS_SYSTEM_PIC) {
> + u16 command;
> + pci_read_config_word(dev, PCI_COMMAND, &command);
> + if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY))
> + return;
> + }
> +
> + pdev_sort_resources(dev, &head);
> +
> + for (list = head.next; list;) {
> + res = list->res;
> + idx = res - &list->dev->resource[0];
> + if (pci_assign_resource(list->dev, idx)) {
> + if (fail_head && !pci_is_root_bus(list->dev->bus)) {
> + /*
> + * device need to keep flags and size
> + * for second try
> + */
> + add_to_failed_list(fail_head, list->dev, res);
> + }
> + res->start = 0;
> + res->end = 0;
> + res->flags = 0;
> + }
> + tmp = list;
> + list = list->next;
> + kfree(tmp);
> + }
> +}

This is extremely similar to pbus_assign_resources_sorted(). Any
chance you could factor out the commonalities and reduce the
amount of duplicated code?

> +static void __ref __pci_bridge_assign_resources(const struct pci_dev *bridge,
> + struct resource_list_x *fail_head)
> +{
> + struct pci_bus *b;
> +
> + pdev_assign_resources_sorted((struct pci_dev *)bridge, fail_head);
> +
> + b = bridge->subordinate;
> + if (!b)
> + return;
> +
> + __pci_bus_assign_resources(b, fail_head);
> +
> + switch (bridge->class >> 8) {
> + case PCI_CLASS_BRIDGE_PCI:
> + pci_setup_bridge(b);
> + break;
> +
> + case PCI_CLASS_BRIDGE_CARDBUS:
> + pci_setup_cardbus(b);
> + break;
> +
> + default:
> + dev_info(&bridge->dev, "not setting up bridge for bus "
> + "%04x:%02x\n", pci_domain_nr(b), b->number);

I think this should probably be a dev_dbg.

thanks,
/ac