From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Yinghai Lu To: Jesse Barnes , x86 Cc: Bjorn Helgaas , Andrew Morton , Linus Torvalds , Greg Kroah-Hartman , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH v2 33/37] x86, PCI: Add pcibios_root_rescan() Date: Fri, 9 Mar 2012 23:00:33 -0800 Message-Id: <1331362837-10740-34-git-send-email-yinghai@kernel.org> In-Reply-To: <1331362837-10740-1-git-send-email-yinghai@kernel.org> References: <1331362837-10740-1-git-send-email-yinghai@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: Need use it to rescan root bus that was not added via acpi probe. Signed-off-by: Yinghai Lu --- arch/x86/include/asm/pci.h | 2 ++ arch/x86/pci/legacy.c | 25 +++++++++++++++++++++++++ 2 files changed, 27 insertions(+), 0 deletions(-) diff --git a/arch/x86/include/asm/pci.h b/arch/x86/include/asm/pci.h index bb015c7..332c191 100644 --- a/arch/x86/include/asm/pci.h +++ b/arch/x86/include/asm/pci.h @@ -30,6 +30,8 @@ extern struct pci_bus *pci_scan_bus_on_node(int busno, struct pci_ops *ops, int node); extern struct pci_bus *pci_scan_bus_with_sysdata(int busno); +void pcibios_root_rescan(void); + #ifdef CONFIG_PCI #ifdef CONFIG_PCI_DOMAINS diff --git a/arch/x86/pci/legacy.c b/arch/x86/pci/legacy.c index aab0e41..251f838 100644 --- a/arch/x86/pci/legacy.c +++ b/arch/x86/pci/legacy.c @@ -79,3 +79,28 @@ int __init pci_subsys_init(void) return 0; } subsys_initcall(pci_subsys_init); + +void __ref pcibios_root_rescan(void) +{ + int busn; + struct pci_bus *bus; + + if (pcibios_last_bus <= 0 || pcibios_last_bus > 0xff) + return; + + for (busn = 0; busn <= pcibios_last_bus; busn++) { + bus = pci_find_bus(0, busn); + + if (bus) + continue; + + bus = __pcibios_scan_specific_bus(busn, false); + + if (!bus) + continue; + + pci_assign_unassigned_bus_resources(bus); + + pci_bus_add_devices(bus); + } +} -- 1.7.7