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

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Date:	Sun, 22 Jun 2014 08:13:16 -0400
From:	Neil Horman <nhorman@...driver.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Cc:	Cong Wang <xiyou.wangcong@...il.com>, netdev@...r.kernel.org,
	s.priebe@...fihost.ag, "David S. Miller" <davem@...emloft.net>
Subject: Re: [Patch net-next] veth: add netpoll support

On Sat, Jun 21, 2014 at 12:15:46AM +0400, Sergei Shtylyov wrote:
> Hello.
> 
> On 06/21/2014 12:07 AM, Neil Horman 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;
> >>
> >>    Not needed.
> 
> >It is, a valid function poniter is how the stack determines if a given driver
> >supports netpoll. See the tun_poll_controller for another example
> >Neil
> 
>    I just said that *return* was not needed. :-)
> 
> >>
> >>>+}
> >>>+#endif	/* CONFIG_NET_POLL_CONTROLLER */
> >>>+
> >>>  static const struct net_device_ops veth_netdev_ops = {
> >>>  	.ndo_init            = veth_dev_init,
> >>>  	.ndo_open            = veth_open,
> 
> WBR, Sergei
> 
> 
My bad, thought you were referring to the function as a whole
Regards
Neil

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