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virtio/vhost-scsi: fix virtio-scsi/vhost-scsi 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-scsi/vhost-scsi 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>
(cherry picked from commit 1312f12bcc)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Gonglei 2014-09-30 14:10:30 +08:00 committed by Michael Roth
parent eb5388e260
commit f06c87b119
3 changed files with 6 additions and 0 deletions
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2
hw/s390x/s390-virtio-bus.c
View File

@ -258,6 +258,7 @@ static void s390_virtio_scsi_instance_init(Object *obj)
VirtIOSCSIS390 *dev = VIRTIO_SCSI_S390(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_unref(OBJECT(&dev->vdev));
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
}
@ -280,6 +281,7 @@ static void s390_vhost_scsi_instance_init(Object *obj)
VHostSCSIS390 *dev = VHOST_SCSI_S390(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_unref(OBJECT(&dev->vdev));
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
}
#endif

2
hw/s390x/virtio-ccw.c
View File

@ -938,6 +938,7 @@ static void virtio_ccw_scsi_instance_init(Object *obj)
VirtIOSCSICcw *dev = VIRTIO_SCSI_CCW(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_unref(OBJECT(&dev->vdev));
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
}
@ -960,6 +961,7 @@ static void vhost_ccw_scsi_instance_init(Object *obj)
VHostSCSICcw *dev = VHOST_SCSI_CCW(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_unref(OBJECT(&dev->vdev));
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
}
#endif

2
hw/virtio/virtio-pci.c
View File

@ -1188,6 +1188,7 @@ static void virtio_scsi_pci_instance_init(Object *obj)
VirtIOSCSIPCI *dev = VIRTIO_SCSI_PCI(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VIRTIO_SCSI);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_unref(OBJECT(&dev->vdev));
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
}
@ -1244,6 +1245,7 @@ static void vhost_scsi_pci_instance_init(Object *obj)
VHostSCSIPCI *dev = VHOST_SCSI_PCI(obj);
object_initialize(&dev->vdev, sizeof(dev->vdev), TYPE_VHOST_SCSI);
object_property_add_child(obj, "virtio-backend", OBJECT(&dev->vdev), NULL);
object_unref(OBJECT(&dev->vdev));
qdev_alias_all_properties(DEVICE(&dev->vdev), obj);
}