From: Gonglei Date: Tue, 30 Sep 2014 06:10:28 +0000 (+0800) Subject: virtio-net: fix virtio-net child refcount in transports X-Git-Tag: qemu-xen-4.6.0-rc1~144^2~28 X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=6a0c6b59788627541faf70864464f1e155dc18d7;p=qemu-upstream-4.6-testing.git virtio-net: fix virtio-net 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-net child is not finalized! Drop our reference after the child property has been added to the parent. Signed-off-by: Gonglei Reviewed-by: Cornelia Huck Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini --- diff --git a/hw/s390x/s390-virtio-bus.c b/hw/s390x/s390-virtio-bus.c index 5b5d59583..297eac236 100644 --- a/hw/s390x/s390-virtio-bus.c +++ b/hw/s390x/s390-virtio-bus.c @@ -161,6 +161,7 @@ static void s390_virtio_net_instance_init(Object *obj) VirtIONetS390 *dev = VIRTIO_NET_S390(obj); object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET); object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); + object_unref(OBJECT(&dev->vdev)); qdev_alias_all_properties(DEVICE(&dev->vdev), obj); } diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 7d675772e..bb699f27f 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -794,6 +794,7 @@ static void virtio_ccw_net_instance_init(Object *obj) VirtIONetCcw *dev = VIRTIO_NET_CCW(obj); object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET); object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); + object_unref(OBJECT(&dev->vdev)); qdev_alias_all_properties(DEVICE(&dev->vdev), obj); } diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 155fac9e8..b82b7380b 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1465,6 +1465,7 @@ static void virtio_net_pci_instance_init(Object *obj) VirtIONetPCI *dev = VIRTIO_NET_PCI(obj); object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_NET); object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL); + object_unref(OBJECT(&dev->vdev)); qdev_alias_all_properties(DEVICE(&dev->vdev), obj); }