[05/17] qdev: Don't assume existence of parent bus on unparenting

Message ID 1357678594-427-6-git-send-email-afaerber@suse.de
State New
Headers show

Commit Message

Andreas Färber Jan. 8, 2013, 8:56 p.m.
Commit 667d22d1ae59da46b4c1fbd094ca61145f19b8c3 (qdev: move bus removal
to object_unparent) made the assumption that at unparenting time
parent_bus is not NULL. This assumption is unjustified since
object_unparent() may well be called directly after object_initialize(),
without any qdev_set_parent_bus().

This did not cause any issues yet because qdev_[try_]create() does call
qdev_set_parent_bus(), falling back to SysBus if unsupplied.

While at it, ensure that this new function uses the device_ prefix and
make the name more neutral in light of this semantic change.

Reported-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Tested-by: Igor Mammedov <imammedo@redhat.com>
 hw/qdev.c |    8 +++++---
 1 Datei geändert, 5 Zeilen hinzugefügt(+), 3 Zeilen entfernt(-)


diff --git a/hw/qdev.c b/hw/qdev.c
index f2c2484..e2a5c57 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -698,16 +698,18 @@  static void device_class_base_init(ObjectClass *class, void *data)
     klass->props = NULL;
-static void qdev_remove_from_bus(Object *obj)
+static void device_unparent(Object *obj)
     DeviceState *dev = DEVICE(obj);
-    bus_remove_child(dev->parent_bus, dev);
+    if (dev->parent_bus != NULL) {
+        bus_remove_child(dev->parent_bus, dev);
+    }
 static void device_class_init(ObjectClass *class, void *data)
-    class->unparent = qdev_remove_from_bus;
+    class->unparent = device_unparent;
 void device_reset(DeviceState *dev)