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virtio-balloon: fix virtio-balloon child refcount in transports

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object_initialize() leaves the object with a refcount of 1.
object_property_add_child() adds its own reference which is dropped
again when the property is deleted.

The upshot of this is that we always have a refcount >= 1.  Upon hot
unplug the virtio-balloon child is not finalized!

Drop our reference after the child property has been added to the
parent.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Gonglei 2014-09-30 14:10:35 +08:00 committed by Paolo Bonzini
parent 352fa88dfb
commit 91ba212088
2 changed files with 2 additions and 2 deletions
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2
hw/s390x/virtio-ccw.c
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@ -900,7 +900,7 @@ static void virtio_ccw_balloon_instance_init(Object *obj)
VirtIOBalloonCcw *dev = VIRTIO_BALLOON_CCW(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_unref(OBJECT(&dev->vdev));
object_property_add(obj, "guest-stats", "guest statistics",
balloon_ccw_stats_get_all, NULL, NULL, dev, NULL);

2
hw/virtio/virtio-pci.c
View File

@ -1325,7 +1325,7 @@ static void virtio_balloon_pci_instance_init(Object *obj)
VirtIOBalloonPCI *dev = VIRTIO_BALLOON_PCI(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BALLOON);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_unref(OBJECT(&dev->vdev));
object_property_add(obj, "guest-stats", "guest statistics",
balloon_pci_stats_get_all, NULL, NULL, dev,
NULL);