commit 846e402300ffa2131239dcf82265b5366cd755f4
author Jiang Liu <jiang.liu@huawei.com> Fri Jun 22 14:55:11 2012 +0800
committer Bjorn Helgaas <bhelgaas@google.com> Fri Jun 22 15:16:14 2012 -0600
tree 75647c417de63d4e5f9f4a712ea2387ff910d3a6
parent 2a76c450bd0377f715caf313ded530290d7dc7d7

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

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>

arch/x86/pci/mmconfig-shared.c

diff --git a/arch/x86/pci/mmconfig-shared.c b/arch/x86/pci/mmconfig-shared.c
index f799949..5e2cd2a 100644
--- a/arch/x86/pci/mmconfig-shared.c
+++ b/arch/x86/pci/mmconfig-shared.c
@@ -61,8 +61,9 @@
 	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 @@
 	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 @@
 	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;