diff options
| -rw-r--r-- | drivers/pci/probe.c | 39 | ||||
| -rw-r--r-- | include/linux/pci.h | 1 |
2 files changed, 40 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index e3f6965..690f0b3 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -2426,6 +2426,45 @@ void pci_bus_release_busn_res(struct pci_bus *b) res, ret ? "can not be" : "is"); } +int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge) +{ + struct resource_entry *window; + bool found = false; + struct pci_bus *b; + int max, bus, ret; + + if (!bridge) + return -EINVAL; + + resource_list_for_each_entry(window, &bridge->windows) + if (window->res->flags & IORESOURCE_BUS) { + found = true; + break; + } + + ret = pci_register_host_bridge(bridge); + if (ret < 0) + return ret; + + b = bridge->bus; + bus = bridge->busnr; + + if (!found) { + dev_info(&b->dev, + "No busn resource found for root bus, will use [bus %02x-ff]\n", + bus); + pci_bus_insert_busn_res(b, bus, 255); + } + + max = pci_scan_child_bus(b); + + if (!found) + pci_bus_update_busn_res_end(b, max); + + return 0; +} +EXPORT_SYMBOL(pci_scan_root_bus_bridge); + struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources, struct msi_controller *msi) diff --git a/include/linux/pci.h b/include/linux/pci.h index d39a66d..fe1eafd 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -857,6 +857,7 @@ struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus, struct pci_bus *pci_scan_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources); +int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge); struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev, int busnr); void pcie_update_link_speed(struct pci_bus *bus, u16 link_status); |
