On Fri, Nov 20, 2020 at 8:12 PM Eugenio Pérez <eperezma@redhat.com> wrote:
>
> ... if sw lm is enabled
>
> Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
> ---
> hw/virtio/vhost.c | 15 ++++++++++-----
> 1 file changed, 10 insertions(+), 5 deletions(-)
>
> diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
> index cb44b9997f..cf000b979f 100644
> --- a/hw/virtio/vhost.c
> +++ b/hw/virtio/vhost.c
> @@ -1424,17 +1424,22 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev,
> struct vhost_vring_state state = {
> .index = vhost_vq_index,
> };
> - int r;
> + int r = -1;
>
> if (virtio_queue_get_desc_addr(vdev, idx) == 0) {
> /* Don't stop the virtqueue which might have not been started */
> return;
> }
>
> - r = dev->vhost_ops->vhost_get_vring_base(dev, &state);
> - if (r < 0) {
> - VHOST_OPS_DEBUG("vhost VQ %u ring restore failed: %d", idx, r);
> - /* Connection to the backend is broken, so let's sync internal
> + if (!dev->sw_lm_enabled) {
> + r = dev->vhost_ops->vhost_get_vring_base(dev, &state);
> + if (r < 0) {
> + VHOST_OPS_DEBUG("vhost VQ %u ring restore failed: %d", idx, r);
> + }
> + }
> +
> + if (!dev->sw_lm_enabled || r < 0) {
This test should actually test for `dev->sw_lm_enabled`, not for negation.
> + /* Connection to the backend is unusable, so let's sync internal
> * last avail idx to the device used idx.
> */
> virtio_queue_restore_last_avail_idx(vdev, idx);
> --
> 2.18.4
>