diff --git a/arch/mips/pci/pci.c b/arch/mips/pci/pci.c
index 170c665..21402ff 100644
--- a/arch/mips/pci/pci.c
+++ b/arch/mips/pci/pci.c
@@ -127,15 +127,20 @@
 		if (!hose->iommu)
 			PCI_DMA_BUS_IS_PHYS = 1;
 
+		if (hose->get_busno && pci_probe_only)
+			next_busno = (*hose->get_busno)();
+
 		bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
 		hose->bus = bus;
 		hose->need_domain_info = need_domain_info;
-		next_busno = bus->subordinate + 1;
-		/* Don't allow 8-bit bus number overflow inside the hose -
-		   reserve some space for bridges. */
-		if (next_busno > 224) {
-			next_busno = 0;
-			need_domain_info = 1;
+		if (bus) {
+			next_busno = bus->subordinate + 1;
+			/* Don't allow 8-bit bus number overflow inside the hose -
+			   reserve some space for bridges. */
+			if (next_busno > 224) {
+				next_busno = 0;
+				need_domain_info = 1;
+			}
 		}
 		continue;