linux-kernel - Re: [PATCH v4 09/14] vhost/vdpa: use get_config_size callback in vhost_vdpa_config

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Message-ID: <32d55226-445e-4de5-2f5e-327bc724f0c4@redhat.com>
Date:   Thu, 18 Mar 2021 11:22:22 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Stefano Garzarella <sgarzare@...hat.com>,
        virtualization@...ts.linux-foundation.org
Cc:     netdev@...r.kernel.org, Xie Yongji <xieyongji@...edance.com>,
        Laurent Vivier <lvivier@...hat.com>,
        Stefan Hajnoczi <stefanha@...hat.com>,
        linux-kernel@...r.kernel.org, Max Gurtovoy <mgurtovoy@...dia.com>,
        Parav Pandit <parav@...dia.com>,
        "Michael S. Tsirkin" <mst@...hat.com>, kvm@...r.kernel.org
Subject: Re: [PATCH v4 09/14] vhost/vdpa: use get_config_size callback in
 vhost_vdpa_config_validate()


在 2021/3/16 上午12:34, Stefano Garzarella 写道:
> Let's use the new 'get_config_size()' callback available instead of
> using the 'virtio_id' to get the size of the device config space.
>
> Signed-off-by: Stefano Garzarella <sgarzare@...hat.com>


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


> ---
>   drivers/vhost/vdpa.c | 9 ++-------
>   1 file changed, 2 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> index e0a27e336293..7ae4080e57d8 100644
> --- a/drivers/vhost/vdpa.c
> +++ b/drivers/vhost/vdpa.c
> @@ -188,13 +188,8 @@ static long vhost_vdpa_set_status(struct vhost_vdpa *v, u8 __user *statusp)
>   static int vhost_vdpa_config_validate(struct vhost_vdpa *v,
>   				      struct vhost_vdpa_config *c)
>   {
> -	long size = 0;
> -
> -	switch (v->virtio_id) {
> -	case VIRTIO_ID_NET:
> -		size = sizeof(struct virtio_net_config);
> -		break;
> -	}
> +	struct vdpa_device *vdpa = v->vdpa;
> +	long size = vdpa->config->get_config_size(vdpa);
>   
>   	if (c->len == 0)
>   		return -EINVAL;