[PATCH] vhost: fix read vs write lock mismatch

[Stephen Hemminger]

If lock is acquired for write, it must be released for write
or a deadlock is likely.

Bugzilla ID: 1582
Fixes: 9fc93a1e2320 ("vhost: fix virtqueue access check in datapath")
Cc: david.marchand at redhat.com
Cc: stable at dpdk.org

Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
---
 lib/vhost/virtio_net.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index 298a5dae74..d764d4bc6a 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -2538,7 +2538,7 @@ virtio_dev_rx_async_submit(struct virtio_net *dev, struct vhost_virtqueue *vq,
 
 	if (unlikely(!vq->access_ok)) {
 		vhost_user_iotlb_rd_unlock(vq);
-		rte_rwlock_read_unlock(&vq->access_lock);
+		rte_rwlock_write_unlock(&vq->access_lock);
 
 		virtio_dev_vring_translate(dev, vq);
 		goto out_no_unlock;
-- 
2.45.2