netdev - Re: [PATCH 1/1] bridge: turn off carrier when the bridge is created

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Message-ID: <54FFAAF9.3000207@windriver.com>
Date:	Wed, 11 Mar 2015 10:39:53 +0800
From:	yzhu1 <Yanjun.Zhu@...driver.com>
To:	<netdev@...r.kernel.org>, <davem@...hat.com>,
	Stephen Hemminger <stephen@...workplumber.org>,
	<dsahern@...il.com>
Subject: Re: [PATCH 1/1] bridge: turn off carrier when the bridge is created

Hi, Stephen && David

Any comment?

Best Regards!
Zhu Yanjun
On 03/10/2015 03:09 PM, Zhu Yanjun wrote:
> When a bridge interface is created, there is no any sub interface
> in it. In this case, the packets should not go to this bridge interface.
> As such, carrier is turned off.
>
> CC: David Ahern <dsahern@...il.com>
> Suggested-by: Stephen Hemminger <stephen@...workplumber.org>
> Signed-off-by: Zhu Yanjun <Yanjun.Zhu@...driver.com>
> ---
>   net/bridge/br_device.c | 4 ++++
>   1 file changed, 4 insertions(+)
>
> diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
> index ffd379d..fcc4794 100644
> --- a/net/bridge/br_device.c
> +++ b/net/bridge/br_device.c
> @@ -394,4 +394,8 @@ void br_dev_setup(struct net_device *dev)
>   	br_netfilter_rtable_init(br);
>   	br_stp_timer_init(br);
>   	br_multicast_init(br);
> +
> +	/* Shutdown bridge to avoid packets */
> +	if (netif_carrier_ok(dev))
> +		netif_carrier_off(dev);
>   }

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