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virtio-rng: fix virtio-rng 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-rng 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 14:10:34 +08:00 committed by Paolo Bonzini
parent 8ee486ae33
commit 352fa88dfb
3 changed files with 3 additions and 0 deletions
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1
hw/s390x/s390-virtio-bus.c
View File

@ -312,6 +312,7 @@ static void s390_virtio_rng_instance_init(Object *obj)
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
object_unref(OBJECT(&dev->vdev));
object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
(Object **)&dev->vdev.conf.rng,
qdev_prop_allow_set_link_before_realize,

1
hw/s390x/virtio-ccw.c
View File

@ -1543,6 +1543,7 @@ static void virtio_ccw_rng_instance_init(Object *obj)
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
object_unref(OBJECT(&dev->vdev));
object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
(Object **)&dev->vdev.conf.rng,
qdev_prop_allow_set_link_before_realize,

1
hw/virtio/virtio-pci.c
View File

@ -1525,6 +1525,7 @@ static void virtio_rng_initfn(Object *obj)
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_RNG);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
object_unref(OBJECT(&dev->vdev));
object_property_add_link(obj, "rng", TYPE_RNG_BACKEND,
(Object **)&dev->vdev.conf.rng,
qdev_prop_allow_set_link_before_realize,