qdev: Drop legacy hotplug fields/methods

It removes not needed anymore BusState::allow_hotplug field and
DeviceClass::unplug callback.
Signed-off-by: NIgor Mammedov <imammedo@redhat.com>
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NAndreas Färber <afaerber@suse.de>

hw/core/qdev.c

@@ -114,7 +114,6 @@ static void qbus_set_hotplug_handler_internal(BusState *bus, Object *handler,
 
     object_property_set_link(OBJECT(bus), OBJECT(handler),
                              QDEV_HOTPLUG_HANDLER_PROPERTY, errp);
-    bus->allow_hotplug = 1;
 }
 
 void qbus_set_hotplug_handler(BusState *bus, DeviceState *handler, Error **errp)
@@ -254,10 +253,7 @@ void qdev_unplug(DeviceState *dev, Error **errp)
             hotplug_handler_unplug(dev->parent_bus->hotplug_handler, dev, errp);
         }
     } else {
-        assert(dc->unplug != NULL);
-        if (dc->unplug(dev) < 0) { /* legacy handler */
-            error_set(errp, QERR_UNDEFINED_ERROR);
-        }
+        assert(0);
     }
 }
 
@@ -294,17 +290,11 @@ void qbus_reset_all_fn(void *opaque)
 }
 
 /* can be used as ->unplug() callback for the simple cases */
-int qdev_simple_unplug_cb(DeviceState *dev)
-{
-    /* just zap it */
-    object_unparent(OBJECT(dev));
-    return 0;
-}
-
 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
                                   DeviceState *dev, Error **errp)
 {
-    qdev_simple_unplug_cb(dev);
+    /* just zap it */
+    object_unparent(OBJECT(dev));
 }
 
 /* Like qdev_init(), but terminate program via error_report() instead of

include/hw/qdev-core.h

@@ -126,7 +126,6 @@ typedef struct DeviceClass {
 
     /* Private to qdev / bus.  */
     qdev_initfn init; /* TODO remove, once users are converted to realize */
-    qdev_event unplug;
     qdev_event exit; /* TODO remove, once users are converted to unrealize */
     const char *bus_type;
 } DeviceClass;
@@ -210,7 +209,6 @@ struct BusState {
     Object obj;
     DeviceState *parent;
     const char *name;
-    int allow_hotplug;
     HotplugHandler *hotplug_handler;
     int max_index;
     bool realized;
@@ -264,7 +262,6 @@ void qdev_init_nofail(DeviceState *dev);
 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
                                  int required_for_version);
 void qdev_unplug(DeviceState *dev, Error **errp);
-int qdev_simple_unplug_cb(DeviceState *dev);
 void qdev_simple_device_unplug_cb(HotplugHandler *hotplug_dev,
                                   DeviceState *dev, Error **errp);
 void qdev_machine_creation_done(void);
@@ -370,6 +367,6 @@ void qbus_set_bus_hotplug_handler(BusState *bus, Error **errp);
 
 static inline bool qbus_is_hotpluggable(BusState *bus)
 {
-   return bus->allow_hotplug || bus->hotplug_handler;
+   return bus->hotplug_handler;
 }
 #endif