x86/PCI: Implement pcibios_resource_survey_bus()
During testing remove/rescan root bus 00, found [ 338.142574] bus: 'pci': really_probe: probing driver ata_piix with device 0000:00:01.1 [ 338.146788] ata_piix 0000:00:01.1: device not available (can't reserve [io 0x01f0-0x01f7]) [ 338.150565] ata_piix: probe of 0000:00:01.1 failed with error -22 because that fixed resource is not claimed. For bootint path it is claimed in from arch/x86/pci/i386.c::pcibios_allocate_resources() Claim those resources, so on the remove/rescan will still use old resources. It is some kind honoring FW setting in the registers during hot add. esp root-bus hot add is through acpi, BIOS has chance to set some registers before handing over. [bhelgaas: move weak definition to patch that uses it] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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@ -352,6 +352,19 @@ static int __init pcibios_assign_resources(void)
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return 0;
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}
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void pcibios_resource_survey_bus(struct pci_bus *bus)
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{
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dev_printk(KERN_DEBUG, &bus->dev, "Allocating resources\n");
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pcibios_allocate_bus_resources(bus);
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pcibios_allocate_resources(bus, 0);
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pcibios_allocate_resources(bus, 1);
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if (!(pci_probe & PCI_ASSIGN_ROMS))
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pcibios_allocate_rom_resources(bus);
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}
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void __init pcibios_resource_survey(void)
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{
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struct pci_bus *bus;
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