linux-kernel - Re: [PATCH v6 26/46] virtio_net: bigger header when VERSION

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Message-Id: <1417163517.5822.6@smtp.corp.redhat.com>
Date:	Fri, 28 Nov 2014 08:39:57 +0008
From:	Jason Wang <jasowang@...hat.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	linux-kernel@...r.kernel.org, thuth@...ux.vnet.ibm.com,
	rusty@....ibm.com, netdev@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, dahi@...ux.vnet.ibm.com,
	pbonzini@...hat.com, David Miller <davem@...emloft.net>
Subject: Re: [PATCH v6 26/46] virtio_net: bigger header when VERSION_1 is
 set



On Fri, Nov 28, 2014 at 4:10 AM, Michael S. Tsirkin <mst@...hat.com> 
wrote:
> With VERSION_1 virtio_net uses same header size
> whether mergeable buffers are enabled or not.
> 
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> Reviewed-by: Cornelia Huck <cornelia.huck@...ibm.com>
> ---
>  drivers/net/virtio_net.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 098f443..a0e64cf 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -1805,7 +1805,8 @@ static int virtnet_probe(struct virtio_device 
> *vdev)
>  	if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF))
>  		vi->mergeable_rx_bufs = true;
>  
> -	if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF))
> +	if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF) ||
> +	    virtio_has_feature(vdev, VIRTIO_F_VERSION_1))
>  		vi->hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
>  	else
>  		vi->hdr_len = sizeof(struct virtio_net_hdr);
> -- 
> MST

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

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