Some calling may not have end decided yet, and may not pass busn_res in resources list. Try to do insert big one and shrink. Also print out one info about that, so we could find out which path does not have busn_res in resources list. Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx> --- drivers/pci/probe.c | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 3d11836..654c727 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -1736,12 +1736,34 @@ struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, int bus, struct pci_ops *ops, void *sysdata, struct list_head *resources) { struct pci_bus *b; + struct pci_host_bridge_window *window, *n; + struct resource *res; + bool found; + + list_for_each_entry_safe(window, n, resources, list) { + res = window->res; + if (res->flags & IORESOURCE_BUS) { + found = true; + break; + } + } b = pci_create_root_bus(parent, bus, ops, sysdata, resources); if (!b) return NULL; + if (!found) { + dev_info(&b->dev, + "No busn resource found for root bus, will use [%02x, ff]\n", + bus); + pci_bus_insert_busn_res(b, bus, 255); + } + b->subordinate = pci_scan_child_bus(b); + + if (!found) + pci_bus_update_busn_res_end(b, b->subordinate); + pci_bus_add_devices(b); return b; } -- 1.7.7 -- 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