Commit 58a83c61 authored by Stefan Hajnoczi's avatar Stefan Hajnoczi Committed by Michael S. Tsirkin
Browse files

virtio: decrement vq->inuse in virtqueue_discard() 



virtqueue_discard() moves vq->last_avail_idx back so the element can be
popped again.  It's necessary to decrement vq->inuse to avoid "leaking"
the element count.

Cc: qemu-stable@nongnu.org
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Reviewed-by: default avatarCornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent bccdef6b

hw/virtio/virtio.c

+1 −0
Original line number Diff line number Diff line
@@ -268,6 +268,7 @@ void virtqueue_discard(VirtQueue *vq, const VirtQueueElement *elem, 
                       unsigned int len)

{

    vq->last_avail_idx--;

    vq->inuse--;

    virtqueue_unmap_sg(vq, elem, len);

}