linux-kernel - Re: [PATCH 09/16] virtio_net: use simplified virtqueue accessors.

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Message-ID: <5124A0F2.2030806@cn.fujitsu.com>
Date:	Wed, 20 Feb 2013 18:09:54 +0800
From:	Wanlong Gao <gaowanlong@...fujitsu.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
CC:	Paolo Bonzini <pbonzini@...hat.com>,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, "Michael S. Tsirkin" <mst@...hat.com>
Subject: Re: [PATCH 09/16] virtio_net: use simplified virtqueue accessors.

On 02/19/2013 03:56 PM, Rusty Russell wrote:
> We never add buffers with input and output parts, so use the new accessors.
> 
> Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>

Reviewed-by: Wanlong Gao <gaowanlong@...fujitsu.com>

> ---
>  drivers/net/virtio_net.c |   11 +++++------
>  1 file changed, 5 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index dbd5cd1..8ca69c0 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -443,7 +443,7 @@ static int add_recvbuf_small(struct receive_queue *rq, gfp_t gfp)
>  
>  	skb_to_sgvec(skb, rq->sg + 1, 0, skb->len);
>  
> -	err = virtqueue_add_buf(rq->vq, rq->sg, 0, 2, skb, gfp);
> +	err = virtqueue_add_inbuf(rq->vq, rq->sg, 2, skb, gfp);
>  	if (err < 0)
>  		dev_kfree_skb(skb);
>  
> @@ -488,8 +488,8 @@ static int add_recvbuf_big(struct receive_queue *rq, gfp_t gfp)
>  
>  	/* chain first in list head */
>  	first->private = (unsigned long)list;
> -	err = virtqueue_add_buf(rq->vq, rq->sg, 0, MAX_SKB_FRAGS + 2,
> -				first, gfp);
> +	err = virtqueue_add_inbuf(rq->vq, rq->sg, MAX_SKB_FRAGS + 2,
> +				  first, gfp);
>  	if (err < 0)
>  		give_pages(rq, first);
>  
> @@ -507,7 +507,7 @@ static int add_recvbuf_mergeable(struct receive_queue *rq, gfp_t gfp)
>  
>  	sg_init_one(rq->sg, page_address(page), PAGE_SIZE);
>  
> -	err = virtqueue_add_buf(rq->vq, rq->sg, 0, 1, page, gfp);
> +	err = virtqueue_add_inbuf(rq->vq, rq->sg, 1, page, gfp);
>  	if (err < 0)
>  		give_pages(rq, page);
>  
> @@ -710,8 +710,7 @@ static int xmit_skb(struct send_queue *sq, struct sk_buff *skb)
>  		sg_set_buf(sq->sg, &hdr->hdr, sizeof hdr->hdr);
>  
>  	num_sg = skb_to_sgvec(skb, sq->sg + 1, 0, skb->len) + 1;
> -	return virtqueue_add_buf(sq->vq, sq->sg, num_sg,
> -				 0, skb, GFP_ATOMIC);
> +	return virtqueue_add_outbuf(sq->vq, sq->sg, num_sg, skb, GFP_ATOMIC);
>  }
>  
>  static netdev_tx_t start_xmit(struct sk_buff *skb, struct net_device *dev)
> 

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