lance: QOM cast cleanup

Signed-off-by: Andreas Färber <afaerber@suse.de>

hw/net/lance.c

@@ -43,8 +43,13 @@
 #include "pcnet.h"
 #include "trace.h"
 
+#define TYPE_LANCE "lance"
+#define SYSBUS_PCNET(obj) \
+    OBJECT_CHECK(SysBusPCNetState, (obj), TYPE_LANCE)
+
 typedef struct {
-    SysBusDevice busdev;
+    SysBusDevice parent_obj;
+
     PCNetState state;
 } SysBusPCNetState;
 
@@ -112,28 +117,29 @@ static const VMStateDescription vmstate_lance = {
     }
 };
 
-static int lance_init(SysBusDevice *dev)
+static int lance_init(SysBusDevice *sbd)
 {
-    SysBusPCNetState *d = FROM_SYSBUS(SysBusPCNetState, dev);
+    DeviceState *dev = DEVICE(sbd);
+    SysBusPCNetState *d = SYSBUS_PCNET(dev);
     PCNetState *s = &d->state;
 
     memory_region_init_io(&s->mmio, OBJECT(d), &lance_mem_ops, d,
                           "lance-mmio", 4);
 
-    qdev_init_gpio_in(&dev->qdev, parent_lance_reset, 1);
+    qdev_init_gpio_in(dev, parent_lance_reset, 1);
 
-    sysbus_init_mmio(dev, &s->mmio);
+    sysbus_init_mmio(sbd, &s->mmio);
 
-    sysbus_init_irq(dev, &s->irq);
+    sysbus_init_irq(sbd, &s->irq);
 
     s->phys_mem_read = ledma_memory_read;
     s->phys_mem_write = ledma_memory_write;
-    return pcnet_common_init(&dev->qdev, s, &net_lance_info);
+    return pcnet_common_init(dev, s, &net_lance_info);
 }
 
 static void lance_reset(DeviceState *dev)
 {
-    SysBusPCNetState *d = DO_UPCAST(SysBusPCNetState, busdev.qdev, dev);
+    SysBusPCNetState *d = SYSBUS_PCNET(dev);
 
     pcnet_h_reset(&d->state);
 }
@@ -158,7 +164,7 @@ static void lance_class_init(ObjectClass *klass, void *data)
 }
 
 static const TypeInfo lance_info = {
-    .name          = "lance",
+    .name          = TYPE_LANCE,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(SysBusPCNetState),
     .class_init    = lance_class_init,