--- zzzz-none-000/linux-3.10.107/arch/alpha/kernel/pci.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/arch/alpha/kernel/pci.c	2021-02-04 17:41:59.000000000 +0000
@@ -245,21 +245,15 @@
 	struct pci_dev *dev = bus->self;
 
 	if (pci_has_flag(PCI_PROBE_ONLY) && dev &&
- 		   (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
- 		pci_read_bridge_bases(bus);
-	} 
+	    (dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
+		pci_read_bridge_bases(bus);
+	}
 
 	list_for_each_entry(dev, &bus->devices, bus_list) {
 		pdev_save_srm_config(dev);
 	}
 }
 
-int
-pcibios_enable_device(struct pci_dev *dev, int mask)
-{
-	return pci_enable_resources(dev, mask);
-}
-
 /*
  *  If we set up a device for bus mastering, we need to check the latency
  *  timer as certain firmware forgets to set it properly, as seen
@@ -291,8 +285,12 @@
 			if (r->parent || !r->start || !r->flags)
 				continue;
 			if (pci_has_flag(PCI_PROBE_ONLY) ||
-			    (r->flags & IORESOURCE_PCI_FIXED))
-				pci_claim_resource(dev, i);
+			    (r->flags & IORESOURCE_PCI_FIXED)) {
+				if (pci_claim_resource(dev, i) == 0)
+					continue;
+
+				pci_claim_bridge_resource(dev, i);
+			}
 		}
 	}
 
@@ -340,6 +338,8 @@
 
 		bus = pci_scan_root_bus(NULL, next_busno, alpha_mv.pci_ops,
 					hose, &resources);
+		if (!bus)
+			continue;
 		hose->bus = bus;
 		hose->need_domain_info = need_domain_info;
 		next_busno = bus->busn_res.end + 1;
@@ -355,6 +355,11 @@
 
 	pci_assign_unassigned_resources();
 	pci_fixup_irqs(alpha_mv.pci_swizzle, alpha_mv.pci_map_irq);
+	for (hose = hose_head; hose; hose = hose->next) {
+		bus = hose->bus;
+		if (bus)
+			pci_bus_add_devices(bus);
+	}
 }