Re: [PATCH 3/3] hw/virtio: Add error handling for vhost_virtqueue_mask failure

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Jul 24, 2026 at 05:37:59PM +0800, Weimin Xiong wrote:
> From: Xiong Weimin <xiongweimin@kylinos.cn>
> 
> In vhost_virtqueue_start(), the call to vhost_virtqueue_mask() has a
> TODO comment indicating errors are not handled. Add proper error
> checking and propagate errors to the caller.
> 
> Signed-off-by: Xiong Weimin <xiongweimin@kylinos.cn>

why is this part of this patchset?

> ---
>  hw/virtio/vhost.c | 10 +++++++--
>  1 file changed, 7 insertions(+), 3 deletions(-)
> 
> diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
> index 1234567890ab..fedcba098765 4321006
> --- a/hw/virtio/vhost.c
> +++ b/hw/virtio/vhost.c
> @@ -1467,9 +1467,13 @@ static int vhost_virtqueue_start(struct VirtIODevice *vdev,
>       * will do it later.
>       */
>      if (!vdev->use_guest_notifier_mask) {
> -        /* TODO: check and handle errors. */
> -        vhost_virtqueue_mask(dev, vdev, idx, false);
> +        int r = vhost_virtqueue_mask(dev, vdev, idx, false);
> +        if (r < 0) {
> +            VHOST_OPS_DEBUG(r, "vhost_virtqueue_mask failed");
> +            r = -1;
> +            goto fail;
> +        }


and then what happens?

>      }
>  
>      if (k->query_guest_notifiers &&