x86/PCI: MMCONFIG: manage pci_mmcfg_region as a list, not a table

This changes pci_mmcfg_region from a table to a list, to make it easier
to add and remove MMCONFIG regions for PCI host bridge hotplug.

Reviewed-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 1 insertions, 4 deletions

diff --git a/arch/x86/pci/mmconfig_32.c b/arch/x86/pci/mmconfig_32.c
index a3cee532c935..c04523e09649 100644
--- a/arch/x86/pci/mmconfig_32.c
+++ b/arch/x86/pci/mmconfig_32.c
@@ -28,15 +28,12 @@ static int mmcfg_last_accessed_cpu;
 static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn)
 {
         struct pci_mmcfg_region *cfg;
-        int cfg_num;
 
-        for (cfg_num = 0; cfg_num < pci_mmcfg_config_num; cfg_num++) {
-                cfg = &pci_mmcfg_config[cfg_num];
+        list_for_each_entry(cfg, &pci_mmcfg_list, list)
                 if (cfg->segment == seg &&
                     (cfg->start_bus <= bus) &&
                     (cfg->end_bus >= bus))
                         return cfg->address;
-        }
 
         /* Fall back to type 0 */
         return 0;