[PATCH net-next v6 5/6] net: dsa: microchip: enable MTU normalization for KSZ8795 and KSZ9477 compatible switches

From: Oleksij Rempel <o.rempel@pengutronix.de>
To: Woojung Huh <woojung.huh@microchip.com>,
	UNGLinuxDriver@microchip.com, Andrew Lunn <andrew@lunn.ch>,
	Vivien Didelot <vivien.didelot@gmail.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Vladimir Oltean <olteanv@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>,
	kernel@pengutronix.de, linux-kernel@vger.kernel.org,
	netdev@vger.kernel.org, Arun.Ramadoss@microchip.com
Subject: [PATCH net-next v6 5/6] net: dsa: microchip: enable MTU normalization for KSZ8795 and KSZ9477 compatible switches
Date: Thu, 24 Nov 2022 11:14:57 +0100	[thread overview]
Message-ID: <20221124101458.3353902-6-o.rempel@pengutronix.de> (raw)
In-Reply-To: <20221124101458.3353902-1-o.rempel@pengutronix.de>

KSZ8795 and KSZ9477 compatible series of switches use global max frame
size configuration register. So, enable MTU normalization for this reason.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 drivers/net/dsa/microchip/ksz8795.c | 2 ++
 drivers/net/dsa/microchip/ksz9477.c | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/net/dsa/microchip/ksz8795.c b/drivers/net/dsa/microchip/ksz8795.c
index d01bfd609130..060e41b9b6ef 100644
--- a/drivers/net/dsa/microchip/ksz8795.c
+++ b/drivers/net/dsa/microchip/ksz8795.c
@@ -1357,6 +1357,8 @@ int ksz8_setup(struct dsa_switch *ds)
 	struct ksz_device *dev = ds->priv;
 	int i;
 
+	ds->mtu_enforcement_ingress = true;
+
 	ksz_cfg(dev, S_REPLACE_VID_CTRL, SW_FLOW_CTRL, true);
 
 	/* Enable automatic fast aging when link changed detected. */
diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index f6e7968ab105..47b54ecf2c6f 100644
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -1134,6 +1134,8 @@ int ksz9477_setup(struct dsa_switch *ds)
 	struct ksz_device *dev = ds->priv;
 	int ret = 0;
 
+	ds->mtu_enforcement_ingress = true;
+
 	/* Required for port partitioning. */
 	ksz9477_cfg32(dev, REG_SW_QM_CTRL__4, UNICAST_VLAN_BOUNDARY,
 		      true);
-- 
2.30.2

