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[Qemu-devel] [PATCH v3 7/8] virtio: fix virtio-blk child refcount in tra
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH v3 7/8] virtio: fix virtio-blk child refcount in transports |
Date: |
Fri, 30 May 2014 13:17:48 +0200 |
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-blk child is not finalized!
Drop our reference after the child property has been added to the
parent.
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
hw/s390x/s390-virtio-bus.c | 1 +
hw/s390x/virtio-ccw.c | 1 +
hw/virtio/virtio-pci.c | 1 +
3 files changed, 3 insertions(+)
diff --git a/hw/s390x/s390-virtio-bus.c b/hw/s390x/s390-virtio-bus.c
index 041d4e2..bf92cb6 100644
--- a/hw/s390x/s390-virtio-bus.c
+++ b/hw/s390x/s390-virtio-bus.c
@@ -191,6 +191,7 @@ static void s390_virtio_blk_instance_init(Object *obj)
VirtIOBlkS390 *dev = VIRTIO_BLK_S390(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK);
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 0cc8132..9360892 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -813,6 +813,7 @@ static void virtio_ccw_blk_instance_init(Object *obj)
VirtIOBlkCcw *dev = VIRTIO_BLK_CCW(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK);
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 3bb782f..abf05a9 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -1102,6 +1102,7 @@ static void virtio_blk_pci_instance_init(Object *obj)
VirtIOBlkPCI *dev = VIRTIO_BLK_PCI(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_BLK);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
+ object_unref(OBJECT(&dev->vdev));
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
}
--
1.9.3
- [Qemu-devel] [PATCH v3 0/8] virtio-blk: use alias properties in transport devices, Stefan Hajnoczi, 2014/05/30
- [Qemu-devel] [PATCH v3 2/8] virtio-blk: avoid qdev property definition duplication, Stefan Hajnoczi, 2014/05/30
- [Qemu-devel] [PATCH v3 1/8] qom: add object_property_add_alias(), Stefan Hajnoczi, 2014/05/30
- [Qemu-devel] [PATCH v3 3/8] virtio-blk: move x-data-plane qdev property to virtio-blk.h, Stefan Hajnoczi, 2014/05/30
- [Qemu-devel] [PATCH v3 4/8] qdev: add qdev_alias_all_properties(), Stefan Hajnoczi, 2014/05/30
- [Qemu-devel] [PATCH v3 6/8] virtio-blk: drop virtio_blk_set_conf(), Stefan Hajnoczi, 2014/05/30
- [Qemu-devel] [PATCH v3 5/8] virtio-blk: use aliases instead of duplicate qdev properties, Stefan Hajnoczi, 2014/05/30
- [Qemu-devel] [PATCH v3 8/8] virtio-blk: move qdev properties into virtio-blk.c, Stefan Hajnoczi, 2014/05/30
- [Qemu-devel] [PATCH v3 7/8] virtio: fix virtio-blk child refcount in transports,
Stefan Hajnoczi <=