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Message-ID: <5e00b4c7-8d3f-e1b2-4359-5ee8fdf92ea9@gmail.com> Date: Tue, 2 May 2023 11:30:36 -0700 From: Florian Fainelli <f.fainelli@...il.com> To: arinc9.unal@...il.com, Sean Wang <sean.wang@...iatek.com>, Landen Chao <Landen.Chao@...iatek.com>, DENG Qingfang <dqfext@...il.com>, Daniel Golle <daniel@...rotopia.org>, Andrew Lunn <andrew@...n.ch>, Vladimir Oltean <olteanv@...il.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Matthias Brugger <matthias.bgg@...il.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, René van Dorst <opensource@...rst.com> Cc: Arınç ÜNAL <arinc.unal@...nc9.com>, Richard van Schagen <richard@...terhints.com>, Richard van Schagen <vschagen@...com>, Frank Wunderlich <frank-w@...lic-files.de>, Bartel Eerdekens <bartel.eerdekens@...stell8.be>, mithat.guner@...ont.com, erkin.bozoglu@...ont.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org Subject: Re: [PATCH net 2/2] net: dsa: mt7530: fix network connectivity with multiple CPU ports On 5/1/2023 5:15 AM, arinc9.unal@...il.com wrote: > From: Arınç ÜNAL <arinc.unal@...nc9.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@...nc9.com> This tag is implied by your Signed-off-by tag. No Fixes tag for this one? -- Florian
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