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 0914982a80c116cf85613814e99563a22eddf7b6..39a56cedbc1f4239842998917fa1cbe866ebf46a 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, 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;
                }