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

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-serial 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 14:10:32 +08:00 committed by Paolo Bonzini
parent 4f456d8025
commit e77ca8b92a
3 changed files with 3 additions and 0 deletions
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1
hw/s390x/s390-virtio-bus.c
View File

@ -227,6 +227,7 @@ static void s390_virtio_serial_instance_init(Object *obj)
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
object_unref(OBJECT(&dev->vdev));
}
static int s390_virtio_scsi_init(VirtIOS390Device *s390_dev)

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

@ -853,6 +853,7 @@ static void virtio_ccw_serial_instance_init(Object *obj)
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
object_unref(OBJECT(&dev->vdev));
}
static int virtio_ccw_balloon_init(VirtioCcwDevice *ccw_dev)

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

@ -1410,6 +1410,7 @@ static void virtio_serial_pci_instance_init(Object *obj)
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SERIAL);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
object_unref(OBJECT(&dev->vdev));
}
static const TypeInfo virtio_serial_pci_info = {