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 9d410c21416f9b04a80e7525f56363d446f4314a..1a23fcc0445cb8c87715fb11cb73e1ff702e0cc9 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;
                }