[qemu-s390x] [PATCH v2 3/3] qdev: Provide qdev_get_bus_hotplug_handler()

[David Hildenbrand]

Let's use a wrapper instead of looking it up manually. This function can
than be reused when we explicitly want to have the bus hotplug handler
(e.g. when the bus hotplug handler was overwritten by the machine
hotplug handler).

Reviewed-by: Igor Mammedov <address@hidden>
Signed-off-by: David Hildenbrand <address@hidden>
---
 hw/core/qdev.c         | 10 +++++++++-
 include/hw/qdev-core.h |  1 +
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 7ad45c0bd6..e2207d77a4 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -233,12 +233,20 @@ HotplugHandler 
*qdev_get_machine_hotplug_handler(DeviceState *dev)
     return NULL;
 }
 
+HotplugHandler *qdev_get_bus_hotplug_handler(DeviceState *dev)
+{
+    if (dev->parent_bus) {
+        return dev->parent_bus->hotplug_handler;
+    }
+    return NULL;
+}
+
 HotplugHandler *qdev_get_hotplug_handler(DeviceState *dev)
 {
     HotplugHandler *hotplug_ctrl = qdev_get_machine_hotplug_handler(dev);
 
     if (hotplug_ctrl == NULL && dev->parent_bus) {
-        hotplug_ctrl = dev->parent_bus->hotplug_handler;
+        hotplug_ctrl = qdev_get_bus_hotplug_handler(dev);
     }
     return hotplug_ctrl;
 }
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 52562555cd..8e0938248b 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -280,6 +280,7 @@ DeviceState *qdev_try_create(BusState *bus, const char 
*name);
 void qdev_init_nofail(DeviceState *dev);
 void qdev_set_legacy_instance_id(DeviceState *dev, int alias_id,
                                  int required_for_version);
+HotplugHandler *qdev_get_bus_hotplug_handler(DeviceState *dev);
 HotplugHandler *qdev_get_machine_hotplug_handler(DeviceState *dev);
 /**
  * qdev_get_hotplug_handler: Get handler responsible for device wiring
-- 
2.17.2