x86/PCI: MMCONFIG: add PCI_MMCFG_BUS_OFFSET() to factor common expression

This factors out the common "bus << 20" expression used when computing the
MMCONFIG address.

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, 1 deletions

diff --git a/arch/x86/pci/mmconfig_32.c b/arch/x86/pci/mmconfig_32.c
index f10a7e94a84c..8c19df89ad75 100644
--- a/arch/x86/pci/mmconfig_32.c
+++ b/arch/x86/pci/mmconfig_32.c
@@ -47,7 +47,7 @@ static u32 get_base_addr(unsigned int seg, int bus, unsigned devfn)
  */
 static void pci_exp_set_dev_base(unsigned int base, int bus, int devfn)
 {
-        u32 dev_base = base | (bus << 20) | (devfn << 12);
+        u32 dev_base = base | PCI_MMCFG_BUS_OFFSET(bus) | (devfn << 12);
         int cpu = smp_processor_id();
         if (dev_base != mmcfg_last_accessed_device ||
             cpu != mmcfg_last_accessed_cpu) {