Re: [RFC PATCH v7 03/25] vdpa: Fix bad index calculus at vhost_vdpa_get_vring_base

[Jason Wang]

在 2022/4/14 00:31, Eugenio Pérez 写道:
> Fixes: 6d0b222666 ("vdpa: Adapt vhost_vdpa_get_vring_base to SVQ")
>
> Signed-off-by: Eugenio Pérez <eperezma@redhat.com>


Acked-by: Jason Wang <jasowang@redhat.com>


> ---
>   hw/virtio/vhost-vdpa.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
> index 9e5fe15d03..1f229ff4cb 100644
> --- a/hw/virtio/vhost-vdpa.c
> +++ b/hw/virtio/vhost-vdpa.c
> @@ -1172,11 +1172,11 @@ static int vhost_vdpa_get_vring_base(struct vhost_dev 
> *dev,
>                                          struct vhost_vring_state *ring)
>   {
>       struct vhost_vdpa *v = dev->opaque;
> +    int vdpa_idx = ring->index - dev->vq_index;
>       int ret;
>   
>       if (v->shadow_vqs_enabled) {
> -        VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs,
> -                                                      ring->index);
> +        VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, vdpa_idx);
>   
>           /*
>            * Setting base as last used idx, so destination will see as available