netdev - Re: [net PATCH 1/1] drivers: net: cpsw: fix dual EMAC stall when connected to same switch

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Date:	Sat, 21 Jun 2014 17:18:30 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	mugunthanvnm@...com
Cc:	netdev@...r.kernel.org, yegorslists@...glemail.com, balbi@...com
Subject: Re: [net PATCH 1/1] drivers: net: cpsw: fix dual EMAC stall when
 connected to same switch

From: Mugunthan V N <mugunthanvnm@...com>
Date: Wed, 18 Jun 2014 17:21:48 +0530

> In commit 629c9a8fd0bbdfc6d702526b327470166ec39c6b (drivers: net: cpsw: Add
> default vlan for dual emac case also), api cpsw_add_default_vlan() also
> changes the port vlan which is required to seperate the ports which results
> in the following behavior
> 
> In Dual EMAC mode, when both the Etnernet connected is connected to same
> switch, it creates a loop in the switch and when a broadcast packet is
> received it is forwarded to the other port which stalls the whole switch
> and needs a reset/power cycle to the switch to recover. So intead of using
> the api, add only the default VLAN entry in dual EMAC case.
> 
> Cc: Yegor Yefremov <yegorslists@...glemail.com>
> Cc: Felipe Balbi <balbi@...com>
> Signed-off-by: Mugunthan V N <mugunthanvnm@...com>

Applied and queued up for -stable, thanks.
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