This patch fixes the rte_vhost_dequeue_burst return value
when the virtqueue is not ready. Without it, a discrepancy
between the packet array and its size is faced by the caller
of this API when the virtqueue is not ready.

Fixes: 9fc93a1e2320 ("vhost: fix virtqueue access check in datapath")
Cc: sta...@dpdk.org

Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
 lib/vhost/virtio_net.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/vhost/virtio_net.c b/lib/vhost/virtio_net.c
index 69901ab3b5..a340e5a772 100644
--- a/lib/vhost/virtio_net.c
+++ b/lib/vhost/virtio_net.c
@@ -3629,6 +3629,8 @@ rte_vhost_dequeue_burst(int vid, uint16_t queue_id,
                rte_rwlock_read_unlock(&vq->access_lock);
 
                virtio_dev_vring_translate(dev, vq);
+
+               count = 0;
                goto out_no_unlock;
        }
 
-- 
2.47.1

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