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x86/PCI: split out pci_mmconfig_alloc() for code reuse

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Split out pci_mmconfig_alloc() for code reuse, which will be used
when supporting PCI root bridge hotplug.

Reviewed-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jiang Liu <liuj97@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Jiang Liu 2012-06-22 14:55:11 +08:00 committed by Bjorn Helgaas
parent 2a76c450bd
commit 846e402300
1 changed files with 15 additions and 4 deletions
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19
arch/x86/pci/mmconfig-shared.c
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@ -61,8 +61,9 @@ static __init void list_add_sorted(struct pci_mmcfg_region *new)
list_add_tail(&new->list, &pci_mmcfg_list);
}
static __init struct pci_mmcfg_region *pci_mmconfig_add(int segment, int start,
int end, u64 addr)
static __devinit struct pci_mmcfg_region *pci_mmconfig_alloc(int segment,
int start,
int end, u64 addr)
{
struct pci_mmcfg_region *new;
struct resource *res;
@ -79,8 +80,6 @@ static __init struct pci_mmcfg_region *pci_mmconfig_add(int segment, int start,
new->start_bus = start;
new->end_bus = end;
list_add_sorted(new);
res = &new->res;
res->start = addr + PCI_MMCFG_BUS_OFFSET(start);
res->end = addr + PCI_MMCFG_BUS_OFFSET(end + 1) - 1;
@ -96,6 +95,18 @@ static __init struct pci_mmcfg_region *pci_mmconfig_add(int segment, int start,
return new;
}
static __init struct pci_mmcfg_region *pci_mmconfig_add(int segment, int start,
int end, u64 addr)
{
struct pci_mmcfg_region *new;
new = pci_mmconfig_alloc(segment, start, end, addr);
if (new)
list_add_sorted(new);
return new;
}
struct pci_mmcfg_region *pci_mmconfig_lookup(int segment, int bus)
{
struct pci_mmcfg_region *cfg;