netdev - Re: [PATCH net-next 2/2] virtio_net: Reuse buffer free function

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Date:   Mon, 16 Jan 2023 10:28:51 +0800
From:   Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To:     Parav Pandit <parav@...dia.com>
Cc:     <edumazet@...gle.com>, <pabeni@...hat.com>,
        <virtualization@...ts.linux-foundation.org>,
        Parav Pandit <parav@...dia.com>, <mst@...hat.com>,
        <jasowang@...hat.com>, <netdev@...r.kernel.org>,
        <davem@...emloft.net>, <kuba@...nel.org>
Subject: Re: [PATCH net-next 2/2] virtio_net: Reuse buffer free function

On Sat, 14 Jan 2023 00:36:19 +0200, Parav Pandit <parav@...dia.com> wrote:
> virtnet_rq_free_unused_buf() helper function to free the buffer
> already exists. Avoid code duplication by reusing existing function.
>
> Signed-off-by: Parav Pandit <parav@...dia.com>


Reviewed-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>


> ---
>  drivers/net/virtio_net.c | 8 +-------
>  1 file changed, 1 insertion(+), 7 deletions(-)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index d45e140b6852..c1faaf11fbcd 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -1251,13 +1251,7 @@ static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
>  	if (unlikely(len < vi->hdr_len + ETH_ZLEN)) {
>  		pr_debug("%s: short packet %i\n", dev->name, len);
>  		dev->stats.rx_length_errors++;
> -		if (vi->mergeable_rx_bufs) {
> -			put_page(virt_to_head_page(buf));
> -		} else if (vi->big_packets) {
> -			give_pages(rq, buf);
> -		} else {
> -			put_page(virt_to_head_page(buf));
> -		}
> +		virtnet_rq_free_unused_buf(rq->vq, buf);
>  		return;
>  	}
>
> --
> 2.26.2
>