6.6-stable review patch. If anyone has any objections, please let me know.
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From: Lorenzo Bianconi lorenzo@kernel.org
[ Upstream commit ccc2f5a436fbb0ae1fb598932a9b8e48423c1959 ]
On MMIO devices (e.g. MT7988 or EN7581) unicast traffic received on lanX port is flooded on all other user ports if the DSA switch is configured without VLAN support since PORT_MATRIX in PCR regs contains all user ports. Similar to MDIO devices (e.g. MT7530 and MT7531) fix the issue defining default VLAN-ID 0 for MT7530 MMIO devices.
Fixes: 110c18bfed414 ("net: dsa: mt7530: introduce driver for MT7988 built-in switch") Signed-off-by: Lorenzo Bianconi lorenzo@kernel.org Reviewed-by: Chester A. Unal chester.a.unal@arinc9.com Link: https://patch.msgid.link/20250304-mt7988-flooding-fix-v1-1-905523ae83e9@kern... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/dsa/mt7530.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c index 53ead0989777f..90ab2f1058ce0 100644 --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -2640,7 +2640,8 @@ mt7531_setup_common(struct dsa_switch *ds) if (ret < 0) return ret;
- return 0; + /* Setup VLAN ID 0 for VLAN-unaware bridges */ + return mt7530_setup_vlan0(priv); }
static int @@ -2734,11 +2735,6 @@ mt7531_setup(struct dsa_switch *ds)
mt7531_setup_common(ds);
- /* Setup VLAN ID 0 for VLAN-unaware bridges */ - ret = mt7530_setup_vlan0(priv); - if (ret) - return ret; - ds->assisted_learning_on_cpu_port = true; ds->mtu_enforcement_ingress = true;