netdev - Re: [Patch net-next] veth: add netpoll support

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Message-ID: <20140620192921.GA18996@hmsreliant.think-freely.org>
Date:	Fri, 20 Jun 2014 15:29:21 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	Cong Wang <xiyou.wangcong@...il.com>
Cc:	netdev@...r.kernel.org, s.priebe@...fihost.ag,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [Patch net-next] veth: add netpoll support

On Fri, Jun 20, 2014 at 12:17:58PM -0700, Cong Wang wrote:
> It is trivial to add netpoll support to veth, since
> it is not stacked device, we don't need to setup and cleanup
> netpoll.
> 
> Reported-by: Stefan Priebe <s.priebe@...fihost.ag>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Neil Horman <nhorman@...driver.com>
> Signed-off-by: Cong Wang <xiyou.wangcong@...il.com>
> 
> ---
> diff --git a/drivers/net/veth.c b/drivers/net/veth.c
> index b4a10bc..03e781b 100644
> --- a/drivers/net/veth.c
> +++ b/drivers/net/veth.c
> @@ -248,6 +248,13 @@ static void veth_dev_free(struct net_device *dev)
>  	free_netdev(dev);
>  }
>  
> +#ifdef CONFIG_NET_POLL_CONTROLLER
> +static void veth_poll_controller(struct net_device *dev)
> +{
> +	return;
> +}
> +#endif	/* CONFIG_NET_POLL_CONTROLLER */
> +
>  static const struct net_device_ops veth_netdev_ops = {
>  	.ndo_init            = veth_dev_init,
>  	.ndo_open            = veth_open,
> @@ -257,6 +264,9 @@ static const struct net_device_ops veth_netdev_ops = {
>  	.ndo_get_stats64     = veth_get_stats64,
>  	.ndo_set_rx_mode     = veth_set_multicast_list,
>  	.ndo_set_mac_address = eth_mac_addr,
> +#ifdef CONFIG_NET_POLL_CONTROLLER
> +	.ndo_poll_controller	= veth_poll_controller,
> +#endif
>  };
>  
>  #define VETH_FEATURES (NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO |    \
> 

Maybe add a comment to the function (like in the tun/tap driver to indicate why
you have a function that only returns there, and why thats importatn.

Otherwise
Acked-by: Neil Horman <nhorman@...driver.com>

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