net: dsa: b53: fix learning on VLAN unaware bridges

[ Upstream commit 9f34ad89bcf0e6df6f8b01f1bdab211493fc66d1 ]

When VLAN filtering is off, we configure the switch to forward, but not
learn on VLAN table misses. This effectively disables learning while not
filtering.

Fix this by switching to forward and learn. Setting the learning disable
register will still control whether learning actually happens.

Fixes: dad8d7c6452b ("net: dsa: b53: Properly account for VLAN filtering")
Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
Tested-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20250429201710.330937-11-jonas.gorski@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c
index aa449fa1826839b11fd0f49a7cb052aa8427bab9..d2ff2c2fcbbfc4e00bfae003a418e01eef85dd3d 100644 (file)
--- a/drivers/net/dsa/b53/b53_common.c
+++ b/drivers/net/dsa/b53/b53_common.c
@@ -383,7 +383,7 @@ static void b53_enable_vlan(struct b53_device *dev, int port, bool enable,
                        vc4 |= VC4_ING_VID_VIO_DROP << VC4_ING_VID_CHECK_S;
                        vc5 |= VC5_DROP_VTABLE_MISS;
                } else {
-                       vc4 |= VC4_ING_VID_VIO_FWD << VC4_ING_VID_CHECK_S;
+                       vc4 |= VC4_NO_ING_VID_CHK << VC4_ING_VID_CHECK_S;
                        vc5 &= ~VC5_DROP_VTABLE_MISS;
                }