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[Qemu-devel] [PATCH v2 9/9] virtio-balloon: fix virtio-balloon child ref
From: |
arei.gonglei |
Subject: |
[Qemu-devel] [PATCH v2 9/9] virtio-balloon: fix virtio-balloon child refcount in transports |
Date: |
Tue, 9 Sep 2014 14:35:10 +0800 |
From: Gonglei <address@hidden>
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 <address@hidden>
---
hw/s390x/virtio-ccw.c | 2 +-
hw/virtio/virtio-pci.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index de0764d..c074f64 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -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);
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index d93ffad..e6cdaca 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1314,7 +1314,7 @@ 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);
--
1.7.12.4
- [Qemu-devel] [PATCH v2 0/9] virtio: fix virtio child recount in transports, arei.gonglei, 2014/09/09
- [Qemu-devel] [PATCH v2 9/9] virtio-balloon: fix virtio-balloon child refcount in transports,
arei.gonglei <=
- [Qemu-devel] [PATCH v2 4/9] virtio/vhost-scsi: fix virtio-scsi/vhost-scsi child refcount in transports, arei.gonglei, 2014/09/09
- [Qemu-devel] [PATCH v2 8/9] virtio-rng: fix virtio-rng child refcount in transports, arei.gonglei, 2014/09/09
- [Qemu-devel] [PATCH v2 2/9] virtio: fix virtio-net child refcount in transports, arei.gonglei, 2014/09/09
- [Qemu-devel] [PATCH v2 3/9] virtio/vhost scsi: use aliases instead of duplicate qdev properties, arei.gonglei, 2014/09/09
- [Qemu-devel] [PATCH v2 1/9] virtio-net: use aliases instead of duplicate qdev properties, arei.gonglei, 2014/09/09