On Fri, Oct 22, 2021 at 10:44 AM Wu Zongyong
<wuzongyong@xxxxxxxxxxxxxxxxx> wrote:
>
> Just failed to probe the vdpa device if the min virtqueue num returned
> by get_vq_num_min is greater than the max virtqueue num returned by
> get_vq_num_max.
>
> Signed-off-by: Wu Zongyong <wuzongyong@xxxxxxxxxxxxxxxxx>
Acked-by: Jason Wang <jasowang@xxxxxxxxxx>
> ---
> drivers/vdpa/vdpa.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
> index 1dc121a07a93..fd014ecec711 100644
> --- a/drivers/vdpa/vdpa.c
> +++ b/drivers/vdpa/vdpa.c
> @@ -26,8 +26,16 @@ static int vdpa_dev_probe(struct device *d)
> {
> struct vdpa_device *vdev = dev_to_vdpa(d);
> struct vdpa_driver *drv = drv_to_vdpa(vdev->dev.driver);
> + const struct vdpa_config_ops *ops = vdev->config;
> + u32 max_num, min_num = 0;
> int ret = 0;
>
> + max_num = ops->get_vq_num_max(vdev);
> + if (ops->get_vq_num_min)
> + min_num = ops->get_vq_num_min(vdev);
> + if (max_num < min_num)
> + return -EINVAL;
> +
> if (drv && drv->probe)
> ret = drv->probe(vdev);
>
> --
> 2.31.1
>
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