diff options
| author | Vladimir Oltean <vladimir.oltean@nxp.com> | 2021-08-04 16:54:34 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-08-05 11:05:48 +0100 |
| commit | 777e55e30d1275e0ddd70efdbcd8cf6f4dae554e (patch) | |
| tree | 965f2b14534ecaa6aa97cc364eeffe778d246136 /drivers/net/dsa | |
| parent | c513002980838af4d65551497f63e403d961ea36 (diff) | |
| download | linux-777e55e30d1275e0ddd70efdbcd8cf6f4dae554e.tar.bz2 | |
net: dsa: sja1105: increase MTU to account for VLAN header on DSA ports
Since all packets are transmitted as VLAN-tagged over a DSA link (this
VLAN tag represents the tag_8021q header), we need to increase the MTU
of these interfaces to account for the possibility that we are already
transporting a user-visible VLAN header.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
| -rw-r--r-- | drivers/net/dsa/sja1105/sja1105_main.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/dsa/sja1105/sja1105_main.c b/drivers/net/dsa/sja1105/sja1105_main.c index d1d4d956cae8..fffcaef6b148 100644 --- a/drivers/net/dsa/sja1105/sja1105_main.c +++ b/drivers/net/dsa/sja1105/sja1105_main.c @@ -982,7 +982,7 @@ static int sja1105_init_l2_policing(struct sja1105_private *priv) for (port = 0; port < ds->num_ports; port++) { int mtu = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN; - if (dsa_is_cpu_port(priv->ds, port)) + if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) mtu += VLAN_HLEN; policing[port].smax = 65535; /* Burst size in bytes */ @@ -2664,7 +2664,7 @@ static int sja1105_change_mtu(struct dsa_switch *ds, int port, int new_mtu) new_mtu += VLAN_ETH_HLEN + ETH_FCS_LEN; - if (dsa_is_cpu_port(ds, port)) + if (dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)) new_mtu += VLAN_HLEN; policing = priv->static_config.tables[BLK_IDX_L2_POLICING].entries; |