scsi/esp: Use QOM realize for scsi esp

Signed-off-by: NHu Tao <hutao@cn.fujitsu.com>
[AF: Drop sysbus_esp_init()]
Signed-off-by: NAndreas Färber <afaerber@suse.de>

hw/scsi/esp.c

@@ -671,23 +671,27 @@ static void sysbus_esp_gpio_demux(void *opaque, int irq, int level)
     }
 }
 
-static int sysbus_esp_init(SysBusDevice *dev)
+static void sysbus_esp_realize(DeviceState *dev, Error **errp)
 {
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     SysBusESPState *sysbus = ESP(dev);
     ESPState *s = &sysbus->esp;
 
-    sysbus_init_irq(dev, &s->irq);
+    sysbus_init_irq(sbd, &s->irq);
     assert(sysbus->it_shift != -1);
 
     s->chip_id = TCHI_FAS100A;
     memory_region_init_io(&sysbus->iomem, OBJECT(sysbus), &sysbus_esp_mem_ops,
                           sysbus, "esp", ESP_REGS << sysbus->it_shift);
-    sysbus_init_mmio(dev, &sysbus->iomem);
+    sysbus_init_mmio(sbd, &sysbus->iomem);
 
-    qdev_init_gpio_in(&dev->qdev, sysbus_esp_gpio_demux, 2);
+    qdev_init_gpio_in(dev, sysbus_esp_gpio_demux, 2);
 
-    scsi_bus_new(&s->bus, &dev->qdev, &esp_scsi_info, NULL);
-    return scsi_bus_legacy_handle_cmdline(&s->bus);
+    scsi_bus_new(&s->bus, dev, &esp_scsi_info, NULL);
+    if (scsi_bus_legacy_handle_cmdline(&s->bus) < 0) {
+        error_setg(errp, "Handling legacy SCSI command line failed");
+        return;
+    }
 }
 
 static void sysbus_esp_hard_reset(DeviceState *dev)
@@ -710,9 +714,8 @@ static const VMStateDescription vmstate_sysbus_esp_scsi = {
 static void sysbus_esp_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
-    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
 
-    k->init = sysbus_esp_init;
+    dc->realize = sysbus_esp_realize;
     dc->reset = sysbus_esp_hard_reset;
     dc->vmsd = &vmstate_sysbus_esp_scsi;
 }