netdev - Re: [Patch net-next v3] netpoll: fix a rtnl lock assertion failure

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Message-ID: <1358183396.8744.3100.camel@edumazet-glaptop>
Date:	Mon, 14 Jan 2013 09:09:56 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cong Wang <amwang@...hat.com>
Cc:	netdev@...r.kernel.org, Jiri Pirko <jiri@...nulli.us>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [Patch net-next v3] netpoll: fix a rtnl lock assertion failure

On Mon, 2013-01-14 at 09:07 -0800, Eric Dumazet wrote:

> Strange, why dont we call netdev_master_upper_dev_get() instead ?
> 
> 

What I meant is : the result of this check might be of little use, if we
don't hold any lock preventing another thread to change things behind
us.



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