Re: [PATCH net v2] net: dsa: mt7530: fix VLAN traffic leaks

From: Florian Fainelli <f.fainelli@gmail.com>
To: DENG Qingfang <dqfext@gmail.com>,
	Sean Wang <sean.wang@mediatek.com>,
	Landen Chao <Landen.Chao@mediatek.com>,
	Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@gmail.com>,
	Vladimir Oltean <olteanv@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	netdev@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Frank Wunderlich <frank-w@public-files.de>
Subject: Re: [PATCH net v2] net: dsa: mt7530: fix VLAN traffic leaks
Date: Sun, 23 May 2021 08:55:07 -0700	[thread overview]
Message-ID: <385fe766-0886-e96d-3e2b-fc2c346685a6@gmail.com> (raw)
In-Reply-To: <20210523145154.655325-1-dqfext@gmail.com>


On 5/23/2021 7:51 AM, DENG Qingfang wrote:
> PCR_MATRIX field was set to all 1's when VLAN filtering is enabled, but
> was not reset when it is disabled, which may cause traffic leaks:
> 
> 	ip link add br0 type bridge vlan_filtering 1
> 	ip link add br1 type bridge vlan_filtering 1
> 	ip link set swp0 master br0
> 	ip link set swp1 master br1
> 	ip link set br0 type bridge vlan_filtering 0
> 	ip link set br1 type bridge vlan_filtering 0
> 	# traffic in br0 and br1 will start leaking to each other
> 
> As port_bridge_{add,del} have set up PCR_MATRIX properly, remove the
> PCR_MATRIX write from mt7530_port_set_vlan_aware.
> 
> Fixes: 83163f7dca56 ("net: dsa: mediatek: add VLAN support for MT7530")
> Signed-off-by: DENG Qingfang <dqfext@gmail.com>

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
-- 
Florian