From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Yinghai Lu To: Jesse Barnes , Benjamin Herrenschmidt , Tony Luck , David Miller , x86 Cc: Bjorn Helgaas , Dominik Brodowski , Andrew Morton , Linus Torvalds , Greg Kroah-Hartman , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Yinghai Lu Subject: [PATCH -v11 08/30] PCI: Checking busn_res in pci_scan_root_bus() Date: Sun, 18 Mar 2012 22:42:39 -0700 Message-Id: <1332135781-13695-9-git-send-email-yinghai@kernel.org> In-Reply-To: <1332135781-13695-1-git-send-email-yinghai@kernel.org> References: <1332135781-13695-1-git-send-email-yinghai@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: 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 --- 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