diff options
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/dsa/qca8k.c | 26 | ||||
| -rw-r--r-- | drivers/net/dsa/qca8k.h | 1 |
2 files changed, 9 insertions, 18 deletions
diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c index d3ed0a7f8077..4e27d9803a5f 100644 --- a/drivers/net/dsa/qca8k.c +++ b/drivers/net/dsa/qca8k.c @@ -2367,16 +2367,18 @@ static int qca8k_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu) { struct qca8k_priv *priv = ds->priv; - int i, mtu = 0; - priv->port_mtu[port] = new_mtu; - - for (i = 0; i < QCA8K_NUM_PORTS; i++) - if (priv->port_mtu[i] > mtu) - mtu = priv->port_mtu[i]; + /* We have only have a general MTU setting. + * DSA always set the CPU port's MTU to the largest MTU of the slave + * ports. + * Setting MTU just for the CPU port is sufficient to correctly set a + * value for every port. + */ + if (!dsa_is_cpu_port(ds, port)) + return 0; /* Include L2 header / FCS length */ - return qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, mtu + ETH_HLEN + ETH_FCS_LEN); + return qca8k_write(priv, QCA8K_MAX_FRAME_SIZE, new_mtu + ETH_HLEN + ETH_FCS_LEN); } static int @@ -3033,16 +3035,6 @@ qca8k_setup(struct dsa_switch *ds) QCA8K_PORT_HOL_CTRL1_WRED_EN, mask); } - - /* Set initial MTU for every port. - * We have only have a general MTU setting. So track - * every port and set the max across all port. - * Set per port MTU to 1500 as the MTU change function - * will add the overhead and if its set to 1518 then it - * will apply the overhead again and we will end up with - * MTU of 1536 instead of 1518 - */ - priv->port_mtu[i] = ETH_DATA_LEN; } /* Special GLOBAL_FC_THRESH value are needed for ar8327 switch */ diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h index f375627174c8..562d75997e55 100644 --- a/drivers/net/dsa/qca8k.h +++ b/drivers/net/dsa/qca8k.h @@ -398,7 +398,6 @@ struct qca8k_priv { struct device *dev; struct dsa_switch_ops ops; struct gpio_desc *reset_gpio; - unsigned int port_mtu[QCA8K_NUM_PORTS]; struct net_device *mgmt_master; /* Track if mdio/mib Ethernet is available */ struct qca8k_mgmt_eth_data mgmt_eth_data; struct qca8k_mib_eth_data mib_eth_data; |