x86/PCI: MMCONFIG: add lookup function
This patch factors out the search for an MMCONFIG region, which was
previously implemented in both mmconfig_32 and mmconfig_64. No functional
change.
Reviewed-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/arch/x86/pci/mmconfig_32.c b/arch/x86/pci/mmconfig_32.c
index c04523e..90d5fd47 100644
--- a/arch/x86/pci/mmconfig_32.c
+++ b/arch/x86/pci/mmconfig_32.c
@@ -27,15 +27,10 @@
*/
static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn)
{
- struct pci_mmcfg_region *cfg;
+ struct pci_mmcfg_region *cfg = pci_mmconfig_lookup(seg, bus);
- 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 */
+ if (cfg)
+ return cfg->address;
return 0;
}