From: Bjorn Helgaas Date: Fri, 28 Oct 2011 22:26:57 +0000 (-0600) Subject: mips/PCI: convert to pci_scan_root_bus() for correct root bus resources X-Git-Tag: firefly_0821_release~3680^2~3753^2~27 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=7c090e5bfa;p=firefly-linux-kernel-4.4.55.git mips/PCI: convert to pci_scan_root_bus() for correct root bus resources Convert from pci_scan_bus() to pci_scan_root_bus() and remove root bus resource fixups. This fixes the problem of "early" and "header" quirks seeing incorrect root bus resources. Based on original patch by Deng-Cheng Zhu. Reference: https://lkml.org/lkml/2011/8/26/89 CC: Ralf Baechle Signed-off-by: Deng-Cheng Zhu Signed-off-by: Bjorn Helgaas Signed-off-by: Jesse Barnes --- diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c index 0586535872cf..fa8e378413b1 100644 --- a/arch/mips/pci/pci.c +++ b/arch/mips/pci/pci.c @@ -81,6 +81,7 @@ static void __devinit pcibios_scanbus(struct pci_controller *hose) { static int next_busno; static int need_domain_info; + LIST_HEAD(resources); struct pci_bus *bus; if (!hose->iommu) @@ -89,7 +90,13 @@ static void __devinit pcibios_scanbus(struct pci_controller *hose) if (hose->get_busno && pci_probe_only) next_busno = (*hose->get_busno)(); - bus = pci_scan_bus(next_busno, hose->pci_ops, hose); + pci_add_resource(&resources, hose->mem_resource); + pci_add_resource(&resources, hose->io_resource); + bus = pci_scan_root_bus(NULL, next_busno, hose->pci_ops, hose, + &resources); + if (!bus) + pci_free_resource_list(&resources); + hose->bus = bus; need_domain_info = need_domain_info || hose->index; @@ -245,15 +252,11 @@ void __devinit pcibios_fixup_bus(struct pci_bus *bus) { /* Propagate hose info into the subordinate devices. */ - struct pci_controller *hose = bus->sysdata; struct list_head *ln; struct pci_dev *dev = bus->self; - if (!dev) { - bus->resource[0] = hose->io_resource; - bus->resource[1] = hose->mem_resource; - } else if (pci_probe_only && - (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { + if (pci_probe_only && dev && + (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) { pci_read_bridge_bases(bus); pcibios_fixup_device_resources(dev, bus); }