From mboxrd@z Thu Jan  1 00:00:00 1970
From: Cong Wang <xiyou.wangcong@gmail.com>
Subject: Re: [PATCH net V2] bonding: send igmp report for its master
Date: Wed, 14 Mar 2012 21:58:46 +0800
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References: <f5d199e12d78dadcfb932e103984276d36b186e0.1331539261.git.panweiping3@gmail.com> <f5d199e12d78dadcfb932e103984276d36b186e0.1331539261.git.panweiping3@gmail.com>
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Cc: fubar@us.ibm.com, andy@greyhouse.net, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
To: Weiping Pan <panweiping3@gmail.com>
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On 03/14/2012 11:37 AM, Weiping Pan wrote:
> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> index 435984a..300c490 100644
> --- a/drivers/net/bonding/bond_main.c
> +++ b/drivers/net/bonding/bond_main.c
> @@ -794,6 +794,14 @@ static void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
>   {
>   	struct bonding *bond = container_of(work, struct bonding,
>   					    mcast_work.work);
> +	struct net_device *bond_dev, *master_dev = NULL;
> +	bond_dev = bond->dev;

IIRC, you need to hold read_lock for this...