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x86/PCI: Factor out pcibios_allocate_dev_rom_resource() 

Factor pcibios_allocate_rom_resources() and
pcibios_allocate_dev_rom_resource() out of pcibios_assign_resources().
This will allow us to allocate ROM resources for hot-added root buses.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Yinghai Lu 2012-11-03 21:39:27 -07:00 committed by Bjorn Helgaas
parent 83edc87ce8
commit dc2f56fa84
1 changed files with 35 additions and 17 deletions
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52
arch/x86/pci/i386.c
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@ -298,27 +298,45 @@ static void __init pcibios_allocate_resources(struct pci_bus *bus, int pass)
}
}
static int __init pcibios_assign_resources(void)
static void __init pcibios_allocate_dev_rom_resource(struct pci_dev *dev)
{
struct pci_dev *dev = NULL;
struct resource *r;
if (!(pci_probe & PCI_ASSIGN_ROMS)) {
/*
* Try to use BIOS settings for ROMs, otherwise let
* pci_assign_unassigned_resources() allocate the new
* addresses.
*/
for_each_pci_dev(dev) {
r = &dev->resource[PCI_ROM_RESOURCE];
if (!r->flags || !r->start)
continue;
if (pci_claim_resource(dev, PCI_ROM_RESOURCE) < 0) {
r->end -= r->start;
r->start = 0;
}
}
/*
* Try to use BIOS settings for ROMs, otherwise let
* pci_assign_unassigned_resources() allocate the new
* addresses.
*/
r = &dev->resource[PCI_ROM_RESOURCE];
if (!r->flags || !r->start)
return;
if (pci_claim_resource(dev, PCI_ROM_RESOURCE) < 0) {
r->end -= r->start;
r->start = 0;
}
}
static void __init pcibios_allocate_rom_resources(struct pci_bus *bus)
{
struct pci_dev *dev;
struct pci_bus *child;
list_for_each_entry(dev, &bus->devices, bus_list) {
pcibios_allocate_dev_rom_resource(dev);
child = dev->subordinate;
if (child)
pcibios_allocate_rom_resources(child);
}
}
static int __init pcibios_assign_resources(void)
{
struct pci_bus *bus;
if (!(pci_probe & PCI_ASSIGN_ROMS))
list_for_each_entry(bus, &pci_root_buses, node)
pcibios_allocate_rom_resources(bus);
pci_assign_unassigned_resources();
pcibios_fw_addr_list_del();