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    SubjectRe: [PATCH v6 5/8] vdpa: min vq num of vdpa device cannot be greater than max vq num
    On Fri, Oct 22, 2021 at 10:44 AM Wu Zongyong
    <wuzongyong@linux.alibaba.com> 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@linux.alibaba.com>

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

    > ---
    > 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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