diff options
| author | Ansuel Smith <ansuelsmth@gmail.com> | 2022-04-16 01:30:12 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2022-04-17 13:28:28 +0100 |
| commit | 69fd055957a02309ffdc23d887a01988b6e5bab1 (patch) | |
| tree | 2d52c82c391d3d24d75f821ab37f7b12cc884577 /drivers/net/dsa/qca8k.c | |
| parent | f9a2fb73318eb4dbf8cd84866b8b0dd012d8b116 (diff) | |
net: dsa: qca8k: drop MTU tracking from qca8k_priv
DSA set the CPU port based on the largest MTU of all the slave ports.
Based on this we can drop the MTU array from qca8k_priv and set the
port_change_mtu logic on DSA changing MTU of the CPU port as the switch
have a global MTU settingfor each port.
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa/qca8k.c')
| -rw-r--r-- | drivers/net/dsa/qca8k.c | 26 |
1 files changed, 9 insertions, 17 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 */ |