hw/s390x/s390-pci-bus: Convert sysbus init function to realize function

The SysBusDeviceClass->init() interface is considered as a legacy interface
and there are currently some efforts going on to get rid of it. Thus let's
convert the init function in the s390x code to realize() instead.
Signed-off-by: NThomas Huth <thuth@redhat.com>
Message-Id: <1538466491-2073-1-git-send-email-thuth@redhat.com>
Reviewed-by: NPhilippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: NDavid Hildenbrand <david@redhat.com>
Signed-off-by: NCornelia Huck <cohuck@redhat.com>

hw/s390x/s390-pci-bus.c

@@ -692,27 +692,35 @@ static void s390_pci_iommu_free(S390pciState *s, PCIBus *bus, int32_t devfn)
     object_unref(OBJECT(iommu));
 }
 
-static int s390_pcihost_init(SysBusDevice *dev)
+static void s390_pcihost_realize(DeviceState *dev, Error **errp)
 {
     PCIBus *b;
     BusState *bus;
     PCIHostState *phb = PCI_HOST_BRIDGE(dev);
     S390pciState *s = S390_PCI_HOST_BRIDGE(dev);
+    Error *local_err = NULL;
 
     DPRINTF("host_init\n");
 
-    b = pci_register_root_bus(DEVICE(dev), NULL,
-                              s390_pci_set_irq, s390_pci_map_irq, NULL,
-                              get_system_memory(), get_system_io(), 0, 64,
-                              TYPE_PCI_BUS);
+    b = pci_register_root_bus(dev, NULL, s390_pci_set_irq, s390_pci_map_irq,
+                              NULL, get_system_memory(), get_system_io(), 0,
+                              64, TYPE_PCI_BUS);
     pci_setup_iommu(b, s390_pci_dma_iommu, s);
 
     bus = BUS(b);
-    qbus_set_hotplug_handler(bus, DEVICE(dev), NULL);
+    qbus_set_hotplug_handler(bus, dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
     phb->bus = b;
 
-    s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, DEVICE(s), NULL));
-    qbus_set_hotplug_handler(BUS(s->bus), DEVICE(s), NULL);
+    s->bus = S390_PCI_BUS(qbus_create(TYPE_S390_PCI_BUS, dev, NULL));
+    qbus_set_hotplug_handler(BUS(s->bus), dev, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+        return;
+    }
 
     s->iommu_table = g_hash_table_new_full(g_int64_hash, g_int64_equal,
                                            NULL, g_free);
@@ -722,9 +730,10 @@ static int s390_pcihost_init(SysBusDevice *dev)
     QTAILQ_INIT(&s->zpci_devs);
 
     css_register_io_adapters(CSS_IO_ADAPTER_PCI, true, false,
-                             S390_ADAPTER_SUPPRESSIBLE, &error_abort);
-
-    return 0;
+                             S390_ADAPTER_SUPPRESSIBLE, &local_err);
+    if (local_err) {
+        error_propagate(errp, local_err);
+    }
 }
 
 static int s390_pci_msix_init(S390PCIBusDevice *pbdev)
@@ -1018,12 +1027,11 @@ static void s390_pcihost_reset(DeviceState *dev)
 
 static void s390_pcihost_class_init(ObjectClass *klass, void *data)
 {
-    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);
     HotplugHandlerClass *hc = HOTPLUG_HANDLER_CLASS(klass);
 
     dc->reset = s390_pcihost_reset;
-    k->init = s390_pcihost_init;
+    dc->realize = s390_pcihost_realize;
     hc->plug = s390_pcihost_hot_plug;
     hc->unplug = s390_pcihost_hot_unplug;
     msi_nonbroken = true;