From d7c66073559386b836bded7cdc8b66ee5c049129 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= Date: Sat, 17 Jun 2023 09:26:46 +0300 Subject: [PATCH] net: dsa: mt7530: fix handling of BPDUs on MT7530 switch MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit BPDUs are link-local frames, therefore they must be trapped to the CPU port. Currently, the MT7530 switch treats BPDUs as regular multicast frames, therefore flooding them to user ports. To fix this, set BPDUs to be trapped to the CPU port. Group this on mt7530_setup() and mt7531_setup_common() into mt753x_trap_frames() and call that. Fixes: b8f126a8d543 ("net-next: dsa: add dsa support for Mediatek MT7530 switch") Signed-off-by: Arınç ÜNAL Reviewed-by: Vladimir Oltean Reviewed-by: Russell King (Oracle) Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- drivers/net/dsa/mt7530.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index 8c9acf109a4e..5e4f6965cebd 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -985,6 +985,14 @@ unlock_exit: mutex_unlock(&priv->reg_mutex); } +static void +mt753x_trap_frames(struct mt7530_priv *priv) +{ + /* Trap BPDUs to the CPU port(s) */ + mt7530_rmw(priv, MT753X_BPC, MT753X_BPDU_PORT_FW_MASK, + MT753X_BPDU_CPU_ONLY); +} + static int mt753x_cpu_port_enable(struct dsa_switch *ds, int port) { @@ -2262,6 +2270,8 @@ mt7530_setup(struct dsa_switch *ds) priv->p6_interface = PHY_INTERFACE_MODE_NA; + mt753x_trap_frames(priv); + /* Enable and reset MIB counters */ mt7530_mib_reset(ds); @@ -2361,9 +2371,7 @@ mt7531_setup_common(struct dsa_switch *ds) struct mt7530_priv *priv = ds->priv; int ret, i; - /* Trap BPDUs to the CPU port(s) */ - mt7530_rmw(priv, MT753X_BPC, MT753X_BPDU_PORT_FW_MASK, - MT753X_BPDU_CPU_ONLY); + mt753x_trap_frames(priv); /* Enable and reset MIB counters */ mt7530_mib_reset(ds); -- 2.11.0