diff options
Diffstat (limited to 'net/dsa')
| -rw-r--r-- | net/dsa/master.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/net/dsa/master.c b/net/dsa/master.c index c90ee3227dea..42f525bc68e2 100644 --- a/net/dsa/master.c +++ b/net/dsa/master.c @@ -158,8 +158,24 @@ static void dsa_master_ethtool_teardown(struct net_device *dev) cpu_dp->orig_ethtool_ops = NULL; } +void dsa_master_set_mtu(struct net_device *dev, struct dsa_port *cpu_dp) +{ + unsigned int mtu = ETH_DATA_LEN + cpu_dp->tag_ops->overhead; + int err; + + rtnl_lock(); + if (mtu <= dev->max_mtu) { + err = dev_set_mtu(dev, mtu); + if (err) + netdev_dbg(dev, "Unable to set MTU to include for DSA overheads\n"); + } + rtnl_unlock(); +} + int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp) { + dsa_master_set_mtu(dev, cpu_dp); + /* If we use a tagging format that doesn't have an ethertype * field, make sure that all packets from this point on get * sent to the tag format's receive function. |