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Message-ID: <5e00b4c7-8d3f-e1b2-4359-5ee8fdf92ea9@gmail.com>
Date:   Tue, 2 May 2023 11:30:36 -0700
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Subject: Re: [PATCH net 2/2] net: dsa: mt7530: fix network connectivity with
 multiple CPU ports
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To:     arinc9.unal@gmail.com, Sean Wang <sean.wang@mediatek.com>,
        Landen Chao <Landen.Chao@mediatek.com>,
        DENG Qingfang <dqfext@gmail.com>,
        Daniel Golle <daniel@makrotopia.org>,
        Andrew Lunn <andrew@lunn.ch>,
        Vladimir Oltean <olteanv@gmail.com>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        AngeloGioacchino Del Regno 
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        netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
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References: <20230501121538.57968-1-arinc.unal@arinc9.com>
 <20230501121538.57968-2-arinc.unal@arinc9.com>
From:   Florian Fainelli <f.fainelli@gmail.com>
In-Reply-To: <20230501121538.57968-2-arinc.unal@arinc9.com>
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On 5/1/2023 5:15 AM, arinc9.unal@gmail.com wrote:
> From: Arınç ÜNAL <arinc.unal@arinc9.com>
> 
> On mt753x_cpu_port_enable() there's code that enables flooding for the CPU
> port only. Since mt753x_cpu_port_enable() runs twice when both CPU ports
> are enabled, port 6 becomes the only port to forward the frames to. But
> port 5 is the active port, so no frames received from the user ports will
> be forwarded to port 5 which breaks network connectivity.
> 
> Every bit of the BC_FFP, UNM_FFP, and UNU_FFP bits represents a port. Fix
> this issue by setting the bit that corresponds to the CPU port without
> overwriting the other bits.
> 
> Clear the bits beforehand only for the MT7531 switch. According to the
> documents MT7621 Giga Switch Programming Guide v0.3 and MT7531 Reference
> Manual for Development Board v1.0, after reset, the BC_FFP, UNM_FFP, and
> UNU_FFP bits are set to 1 for MT7531, 0 for MT7530.
> 
> Tested-by: Arınç ÜNAL <arinc.unal@arinc9.com>

This tag is implied by your Signed-off-by tag. No Fixes tag for this one?
-- 
Florian