This is a note to let you know that I've just added the patch titled
net: dsa: mt7530: fix handling of 802.1X PAE frames
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-dsa-mt7530-fix-handling-of-802.1x-pae-frames.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b185524939a3dc9d451961da052a6cdd48b2a0d3
Author: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
Date: Sun Aug 13 13:59:17 2023 +0300
net: dsa: mt7530: fix handling of 802.1X PAE frames
[ Upstream commit e94b590abfff2cdbf0bdaa7d9904364c8d480af5 ]
802.1X PAE frames are link-local frames, therefore they must be trapped to
the CPU port. Currently, the MT753X switches treat 802.1X PAE frames as
regular multicast frames, therefore flooding them to user ports. To fix
this, set 802.1X PAE frames to be trapped to the CPU port(s).
Fixes: b8f126a8d543 ("net-next: dsa: add dsa support for Mediatek MT7530 switch")
Signed-off-by: Arınç ÜNAL <arinc.unal@xxxxxxxxxx>
Reviewed-by: Vladimir Oltean <olteanv@xxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Stable-dep-of: e8bf353577f3 ("net: dsa: mt7530: fix link-local frames that ingress vlan filtering ports")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index 252e8eaa92767..30570b9dc88f2 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1000,6 +1000,10 @@ mt753x_trap_frames(struct mt7530_priv *priv)
mt7530_rmw(priv, MT753X_BPC, MT753X_BPDU_PORT_FW_MASK,
MT753X_BPDU_CPU_ONLY);
+ /* Trap 802.1X PAE frames to the CPU port(s) */
+ mt7530_rmw(priv, MT753X_BPC, MT753X_PAE_PORT_FW_MASK,
+ MT753X_PAE_PORT_FW(MT753X_BPDU_CPU_ONLY));
+
/* Trap LLDP frames with :0E MAC DA to the CPU port(s) */
mt7530_rmw(priv, MT753X_RGAC2, MT753X_R0E_PORT_FW_MASK,
MT753X_R0E_PORT_FW(MT753X_BPDU_CPU_ONLY));
diff --git a/drivers/net/dsa/mt7530.h b/drivers/net/dsa/mt7530.h
index 8cee462d5f1cb..2c895f35383e2 100644
--- a/drivers/net/dsa/mt7530.h
+++ b/drivers/net/dsa/mt7530.h
@@ -65,6 +65,8 @@ enum mt753x_id {
/* Registers for BPDU and PAE frame control*/
#define MT753X_BPC 0x24
#define MT753X_BPDU_PORT_FW_MASK GENMASK(2, 0)
+#define MT753X_PAE_PORT_FW_MASK GENMASK(18, 16)
+#define MT753X_PAE_PORT_FW(x) FIELD_PREP(MT753X_PAE_PORT_FW_MASK, x)
/* Register for :03 and :0E MAC DA frame control */
#define MT753X_RGAC2 0x2c
