diff options
| author | Jarod Wilson <jarod@redhat.com> | 2016-10-07 22:04:34 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-10-13 09:36:57 -0400 |
| commit | a52ad514fdf3b8a57ca4322c92d2d8d5c6182485 (patch) | |
| tree | d5c763c23ce3faa611fa00b386f9a095ad364315 /net/ethernet | |
| parent | 61e84623ace35ce48975e8f90bbbac7557c43d61 (diff) | |
| download | lwn-a52ad514fdf3b8a57ca4322c92d2d8d5c6182485.tar.gz lwn-a52ad514fdf3b8a57ca4322c92d2d8d5c6182485.zip | |
net: deprecate eth_change_mtu, remove usage
With centralized MTU checking, there's nothing productive done by
eth_change_mtu that isn't already done in dev_set_mtu, so mark it as
deprecated and remove all usage of it in the kernel. All callers have been
audited for calls to alloc_etherdev* or ether_setup directly, which means
they all have a valid dev->min_mtu and dev->max_mtu. Now eth_change_mtu
prints out a netdev_warn about being deprecated, for the benefit of
out-of-tree drivers that might be utilizing it.
Of note, dvb_net.c actually had dev->mtu = 4096, while using
eth_change_mtu, meaning that if you ever tried changing it's mtu, you
couldn't set it above 1500 anymore. It's now getting dev->max_mtu also set
to 4096 to remedy that.
v2: fix up lantiq_etop, missed breakage due to drive not compiling on x86
CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ethernet')
| -rw-r--r-- | net/ethernet/eth.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c index 66dff5e3d772..f983c102ebe3 100644 --- a/net/ethernet/eth.c +++ b/net/ethernet/eth.c @@ -322,8 +322,7 @@ EXPORT_SYMBOL(eth_mac_addr); */ int eth_change_mtu(struct net_device *dev, int new_mtu) { - if (new_mtu < 68 || new_mtu > ETH_DATA_LEN) - return -EINVAL; + netdev_warn(dev, "%s is deprecated\n", __func__); dev->mtu = new_mtu; return 0; } @@ -357,6 +356,8 @@ void ether_setup(struct net_device *dev) dev->type = ARPHRD_ETHER; dev->hard_header_len = ETH_HLEN; dev->mtu = ETH_DATA_LEN; + dev->min_mtu = ETH_MIN_MTU; + dev->max_mtu = ETH_DATA_LEN; dev->addr_len = ETH_ALEN; dev->tx_queue_len = 1000; /* Ethernet wants good queues */ dev->flags = IFF_BROADCAST|IFF_MULTICAST; |