netdev - Re: [PATCH] bridge: master device stuck in no-carrier state forever when in user-stp mode

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Message-ID: <20111201104409.2d04ca06@nehalam.linuxnetplumber.net>
Date:	Thu, 1 Dec 2011 10:44:09 -0800
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Vitalii Demianets <vitas@...factor.kiev.ua>
Cc:	netdev@...r.kernel.org, bridge@...ts.linux-foundation.org,
	Michael Tremer <michael.tremer@...ire.org>
Subject: Re: [PATCH] bridge: master device stuck in no-carrier state forever
 when in user-stp mode

On Fri, 25 Nov 2011 12:16:37 +0200
Vitalii Demianets <vitas@...factor.kiev.ua> wrote:

> When in user-stp mode, bridge master do not follow state of its slaves, so 
> after the following sequence of events it can stuck forever in no-carrier 
> state:
> 1) turn stp off
> 2) put all slaves down - master device will follow their state and also go in 
> no-carrier state
> 3) turn stp on with bridge-stp script returning 0 (go to the user-stp mode)
> Now bridge master won't follow slaves' state and will never reach running 
> state.
> 
> This patch solves the problem by making user-stp and kernel-stp behavior 
> similar regarding master following slaves' states.
> 
> Signed-off-by: Vitalii Demianets <vitas@...factor.kiev.ua>

This method works fine. David please apply to -net.

Acked-by: Stephen Hemminger <shemminger@...tta.com>
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