linux-kernel - Re: [PATCH] drivers/net: caif: fix wrong rtnl_is

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Message-Id: <20130709.125632.1573031651619706332.davem@davemloft.net>
Date:	Tue, 09 Jul 2013 12:56:32 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	khlebnikov@...nvz.org
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	dmitry.tarnyagin@...kless.no
Subject: Re: [PATCH] drivers/net: caif: fix wrong rtnl_is_locked() usage

From: Konstantin Khlebnikov <khlebnikov@...nvz.org>
Date: Mon, 08 Jul 2013 11:23:04 +0400

> rtnl_is_locked() doesn't check who holds this lock, it just tells that it's
> locked right now. if caif::ldisc_close really can be called under rtrnl_lock
> then it should release net device in other context because there is no way
> to grab rtnl_lock without deadlock.
> 
> This patch adds work which releases these devices. Also this patch fixes calling
> dev_close/unregister_netdevice without rtnl_lock from caif_ser_exit().
> 
> Signed-off-by: Konstantin Khlebnikov <khlebnikov@...nvz.org>

Applied.
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