virtio-rng: Convert to QOM realize

Signed-off-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

hw/virtio/virtio-rng.c

@@ -133,16 +133,16 @@ static void check_rate_limit(void *opaque)
                    qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + vrng->conf.period_ms);
 }
 
-static int virtio_rng_device_init(VirtIODevice *vdev)
+static void virtio_rng_device_realize(DeviceState *dev, Error **errp)
 {
-    DeviceState *dev = DEVICE(vdev);
+    VirtIODevice *vdev = VIRTIO_DEVICE(dev);
     VirtIORNG *vrng = VIRTIO_RNG(dev);
     Error *local_err = NULL;
 
     if (!vrng->conf.period_ms > 0) {
-        qerror_report(QERR_INVALID_PARAMETER_VALUE, "period",
-                      "a positive number");
-        return -1;
+        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "period",
+                  "a positive number");
+        return;
     }
 
     if (vrng->conf.rng == NULL) {
@@ -162,15 +162,14 @@ static int virtio_rng_device_init(VirtIODevice *vdev)
 
     vrng->rng = vrng->conf.rng;
     if (vrng->rng == NULL) {
-        qerror_report(QERR_INVALID_PARAMETER_VALUE, "rng", "a valid object");
-        return -1;
+        error_set(errp, QERR_INVALID_PARAMETER_VALUE, "rng", "a valid object");
+        return;
     }
 
     rng_backend_open(vrng->rng, &local_err);
     if (local_err) {
-        qerror_report_err(local_err);
-        error_free(local_err);
-        return -1;
+        error_propagate(errp, local_err);
+        return;
     }
 
     vrng->vq = virtio_add_queue(vdev, 8, handle_input);
@@ -186,8 +185,6 @@ static int virtio_rng_device_init(VirtIODevice *vdev)
 
     register_savevm(dev, "virtio-rng", -1, 1, virtio_rng_save,
                     virtio_rng_load, vrng);
-
-    return 0;
 }
 
 static void virtio_rng_device_exit(VirtIODevice *vdev)
@@ -209,9 +206,10 @@ static void virtio_rng_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
     VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
+
     dc->props = virtio_rng_properties;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
-    vdc->init = virtio_rng_device_init;
+    vdc->realize = virtio_rng_device_realize;
     vdc->exit = virtio_rng_device_exit;
     vdc->get_features = get_features;
 }

include/hw/virtio/virtio-rng.h

@@ -18,6 +18,8 @@
 #define TYPE_VIRTIO_RNG "virtio-rng-device"
 #define VIRTIO_RNG(obj) \
         OBJECT_CHECK(VirtIORNG, (obj), TYPE_VIRTIO_RNG)
+#define VIRTIO_RNG_GET_PARENT_CLASS(obj) \
+        OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_RNG)
 
 /* The Virtio ID for the virtio rng device */
 #define VIRTIO_ID_RNG    4