1 files changed, 6 insertions, 0 deletions

diff --git a/arch/x86_64/pci/mmconfig.c b/arch/x86_64/pci/mmconfig.c
index 918fc5b95a06..65d82736987e 100644
--- a/arch/x86_64/pci/mmconfig.c
+++ b/arch/x86_64/pci/mmconfig.c
@@ -126,6 +126,12 @@ static void __iomem * __init mcfg_ioremap(struct acpi_mcfg_allocation *cfg)
         return addr;
 }
 
+int __init pci_mmcfg_arch_reachable(unsigned int seg, unsigned int bus,
+                                    unsigned int devfn)
+{
+        return pci_dev_base(seg, bus, devfn) != NULL;
+}
+
 int __init pci_mmcfg_arch_init(void)
 {
         int i;