linux-kernel - [PATCH] Do not add all User ports to the CPU by default. This will break Multi CPU when added a seperate patch. It will be overwritten by .port_enable and since we are forcing output to a port via the Special Tag this is not needed.

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Message-Id: <20230212215152.673221-1-richard@routerhints.com>
Date:   Sun, 12 Feb 2023 22:51:52 +0100
From:   Richard van Schagen <richard@...terhints.com>
To:     Sean Wang <sean.wang@...iatek.com>,
        Landen Chao <Landen.Chao@...iatek.com>,
        DENG Qingfang <dqfext@...il.com>, Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        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>,
        Arinc Unal <arinc.unal@...nc9.com>,
        Frank Wunderlich <frank-w@...lic-files.de>
Cc:     Richard van Schagen <richard@...terhints.com>,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH] Do not add all User ports to the CPU by default. This will break Multi CPU when added a seperate patch. It will be overwritten by .port_enable and since we are forcing output to a port via the Special Tag this is not needed.

---
 drivers/net/dsa/mt7530.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index f456541a68bc..f59f706d176e 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1019,12 +1019,6 @@ mt753x_cpu_port_enable(struct dsa_switch *ds, int port)
 	if (priv->id == ID_MT7621)
 		mt7530_rmw(priv, MT7530_MFC, CPU_MASK, CPU_EN | CPU_PORT(port));
 
-	/* CPU port gets connected to all user ports of
-	 * the switch.
-	 */
-	mt7530_write(priv, MT7530_PCR_P(port),
-		     PCR_MATRIX(dsa_user_ports(priv->ds)));
-
 	/* Set to fallback mode for independent VLAN learning */
 	mt7530_rmw(priv, MT7530_PCR_P(port), PCR_PORT_VLAN_MASK,
 		   MT7530_PORT_FALLBACK_MODE);
-- 
2.30.2