diff --git a/sys/dev/pci/pci_host_generic.c b/sys/dev/pci/pci_host_generic.c
--- a/sys/dev/pci/pci_host_generic.c
+++ b/sys/dev/pci/pci_host_generic.c
@@ -80,6 +80,7 @@
 	struct resource_map map;
 #endif
 	struct generic_pcie_core_softc *sc;
+	struct rman *rm;
 	uint64_t phys_base;
 	uint64_t pci_base;
 	uint64_t size;
@@ -183,75 +184,51 @@
 			range_descr = "prefetch";
 			flags = RF_PREFETCHABLE;
 			type = SYS_RES_MEMORY;
-			error = rman_manage_region(&sc->pmem_rman,
-			   pci_base, pci_base + size - 1);
+			rm = &sc->pmem_rman;
 			break;
 		case FLAG_TYPE_MEM:
 			range_descr = "memory";
 			flags = 0;
 			type = SYS_RES_MEMORY;
-			error = rman_manage_region(&sc->mem_rman,
-			   pci_base, pci_base + size - 1);
+			rm = &sc->mem_rman;
 			break;
 		case FLAG_TYPE_IO:
 			range_descr = "I/O port";
 			flags = 0;
 			type = SYS_RES_IOPORT;
-			error = rman_manage_region(&sc->io_rman,
-			   pci_base, pci_base + size - 1);
+			rm = &sc->io_rman;
 			break;
 		default:
 			continue;
 		}
-		if (error) {
-			device_printf(dev, "rman_manage_region() failed."
-						"error = %d\n", error);
-			goto err_rman_manage;
-		}
+		if (bootverbose)
+			device_printf(dev,
+			    "PCI addr: 0x%jx, CPU addr: 0x%jx, Size: 0x%jx, Type: %s\n",
+			    pci_base, phys_base, size, range_descr);
 		error = bus_set_resource(dev, type, rid, phys_base, size);
 		if (error != 0) {
 			device_printf(dev,
 			    "failed to set resource for range %d: %d\n", tuple,
 			    error);
-			goto err_rman_manage;
+			continue;
 		}
 		sc->ranges[tuple].res = bus_alloc_resource_any(dev, type, &rid,
 		    RF_ACTIVE | RF_UNMAPPED | flags);
 		if (sc->ranges[tuple].res == NULL) {
 			device_printf(dev,
 			    "failed to allocate resource for range %d\n", tuple);
-			error = ENXIO;
-			goto err_rman_manage;
+			continue;
+		}
+		error = rman_manage_region(rm, pci_base, pci_base + size - 1);
+		if (error) {
+			device_printf(dev, "rman_manage_region() failed."
+						"error = %d\n", error);
+			continue;
 		}
-		if (bootverbose)
-			device_printf(dev,
-			    "PCI addr: 0x%jx, CPU addr: 0x%jx, Size: 0x%jx, Type: %s\n",
-			    pci_base, phys_base, size, range_descr);
 	}
 
 	return (0);
 
-err_rman_manage:
-	for (tuple = 0; tuple < MAX_RANGES_TUPLES; tuple++) {
-		if (sc->ranges[tuple].size == 0)
-			continue; /* empty range element */
-		switch (FLAG_TYPE(sc->ranges[tuple].flags)) {
-		case FLAG_TYPE_PMEM:
-		case FLAG_TYPE_MEM:
-			type = SYS_RES_MEMORY;
-			break;
-		case FLAG_TYPE_IO:
-			type = SYS_RES_IOPORT;
-			break;
-		default:
-			continue;
-		}
-		if (sc->ranges[tuple].res != NULL)
-			bus_release_resource(dev, type, tuple + 1,
-			    sc->ranges[tuple].res);
-		bus_delete_resource(dev, type, tuple + 1);
-	}
-	rman_fini(&sc->io_rman);
 err_io_rman:
 	rman_fini(&sc->mem_rman);
 err_mem_rman: