linux-kernel - [PATCH] net: dsa: lan9303: allow vid != 0 in port_fdb

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Message-Id: <20230531143826.477267-1-alexander.sverdlin@siemens.com>
Date:   Wed, 31 May 2023 16:38:26 +0200
From:   "A. Sverdlin" <alexander.sverdlin@...mens.com>
To:     netdev@...r.kernel.org
Cc:     Alexander Sverdlin <alexander.sverdlin@...mens.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-kernel@...r.kernel.org,
        Egil Hjelmeland <privat@...l-hjelmeland.no>
Subject: [PATCH] net: dsa: lan9303: allow vid != 0 in port_fdb_{add|del} methods

From: Alexander Sverdlin <alexander.sverdlin@...mens.com>

LAN9303 doesn't associate FDB (ALR) entries with VLANs, it has just one
global Address Logic Resolution table [1].

Ignore VID in port_fdb_{add|del} methods, go on with the global table. This
is the same semantics as hellcreek or RZ/N1 implement.

Visible symptoms:
LAN9303_MDIO 5b050000.ethernet-1:00: port 2 failed to delete 00:xx:xx:xx:xx:cf vid 1 from fdb: -2
LAN9303_MDIO 5b050000.ethernet-1:00: port 2 failed to add 00:xx:xx:xx:xx:cf vid 1 to fdb: -95

[1] https://ww1.microchip.com/downloads/en/DeviceDoc/00002308A.pdf

Fixes: 0620427ea0d6 ("net: dsa: lan9303: Add fdb/mdb manipulation")
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@...mens.com>
---
 drivers/net/dsa/lan9303-core.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/net/dsa/lan9303-core.c b/drivers/net/dsa/lan9303-core.c
index cbe831875347..c0215a8770f4 100644
--- a/drivers/net/dsa/lan9303-core.c
+++ b/drivers/net/dsa/lan9303-core.c
@@ -1188,8 +1188,6 @@ static int lan9303_port_fdb_add(struct dsa_switch *ds, int port,
 	struct lan9303 *chip = ds->priv;
 
 	dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
-	if (vid)
-		return -EOPNOTSUPP;
 
 	return lan9303_alr_add_port(chip, addr, port, false);
 }
@@ -1201,8 +1199,6 @@ static int lan9303_port_fdb_del(struct dsa_switch *ds, int port,
 	struct lan9303 *chip = ds->priv;
 
 	dev_dbg(chip->dev, "%s(%d, %pM, %d)\n", __func__, port, addr, vid);
-	if (vid)
-		return -EOPNOTSUPP;
 	lan9303_alr_del_port(chip, addr, port);
 
 	return 0;
-- 
2.40.1