qdev: Add wrapper to set BUS as HotplugHandler

To be used for conversion of SCSI and USB devices,
and would allow to make every HBA/USB host switch
to HotplugHandler API without touching each controller
explicitly.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>

hw/core/qdev.c

diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 9f18520..b1da409 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -112,6 +112,25 @@
     bus_add_child(bus, dev);
 }
 
+static void qbus_set_hotplug_handler_internal(BusState *bus, Object *handler,
+                                              Error **errp)
+{
+
+    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)
+{
+    qbus_set_hotplug_handler_internal(bus, OBJECT(handler), errp);
+}
+
+void qbus_set_bus_hotplug_handler(BusState *bus, Error **errp)
+{
+    qbus_set_hotplug_handler_internal(bus, OBJECT(bus), errp);
+}
+
 /* Create a new device.  This only initializes the device state structure
    and allows properties to be set.  qdev_init should be called to
    initialize the actual device emulation.  */

include/hw/qdev-core.h

diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index ba812c5..48e9579 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -363,13 +363,10 @@
 
 char *qdev_get_dev_path(DeviceState *dev);
 
-static inline void qbus_set_hotplug_handler(BusState *bus, DeviceState *handler,
-                                            Error **errp)
-{
-    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);
+
+void qbus_set_bus_hotplug_handler(BusState *bus, Error **errp);
 
 static inline bool qbus_is_hotpluggable(BusState *bus)
 {