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vhost: fix zcopy reference counting
author
Michael S. Tsirkin
<mst@redhat.com>
Tue, 19 Jul 2011 10:19:18 +0000
(13:19 +0300)
committer
Michael S. Tsirkin
<mst@redhat.com>
Tue, 19 Jul 2011 10:28:34 +0000
(13:28 +0300)
Fix get/put refcount imbalance with zero copy,
which caused qemu to hang forever on guest driver unload.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
drivers/vhost/vhost.c
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diff --git
a/drivers/vhost/vhost.c
b/drivers/vhost/vhost.c
index
46822c0
..
c16d225
100644
(file)
--- a/
drivers/vhost/vhost.c
+++ b/
drivers/vhost/vhost.c
@@
-1578,7
+1578,6
@@
struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq,
if (!ubufs)
return ERR_PTR(-ENOMEM);
kref_init(&ubufs->kref);
- kref_get(&ubufs->kref);
init_waitqueue_head(&ubufs->wait);
ubufs->vq = vq;
return ubufs;