diff options
author | Jarod Wilson <jarod@redhat.com> | 2016-10-17 15:54:03 -0400 |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2016-10-18 11:34:18 -0400 |
commit | 67bef942801842ce7486a23dd3940e320f217319 (patch) | |
tree | 72f6631b36ce03e0a8ea2671f511a3181ca22e3a /drivers/net/ethernet/atheros/atl1c/atl1c_main.c | |
parent | 60d2d8dd9e1a2580541a3d28eb90d092381e2153 (diff) | |
download | linux-stable-67bef942801842ce7486a23dd3940e320f217319.tar.gz linux-stable-67bef942801842ce7486a23dd3940e320f217319.tar.bz2 linux-stable-67bef942801842ce7486a23dd3940e320f217319.zip |
ethernet/atheros: use core min/max MTU checking
atl2: min_mtu 40, max_mtu 1504
- Remove a few redundant defines that already have equivalents in
if_ether.h.
atl1: min_mtu 42, max_mtu 10218
atl1e: min_mtu 42, max_mtu 8170
atl1c: min_mtu 42, max_mtu 6122/1500
- GbE hardware gets a max_mtu of 6122, slower hardware gets 1500.
alx: min_mtu 34, max_mtu 9256
- Not so sure that minimum MTU number is really what was intended, but
that's what the math actually makes it out to be, due to max_frame
manipulations and comparison in alx_change_mtu, rather than just
comparing new_mtu. (I think 68 was the intended min_mtu value).
CC: netdev@vger.kernel.org
CC: Jay Cliburn <jcliburn@gmail.com>
CC: Chris Snook <chris.snook@gmail.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/atheros/atl1c/atl1c_main.c')
-rw-r--r-- | drivers/net/ethernet/atheros/atl1c/atl1c_main.c | 41 |
1 files changed, 26 insertions, 15 deletions
diff --git a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c index a3200ea6d765..773d3b7d8dd5 100644 --- a/drivers/net/ethernet/atheros/atl1c/atl1c_main.c +++ b/drivers/net/ethernet/atheros/atl1c/atl1c_main.c @@ -519,6 +519,26 @@ static int atl1c_set_features(struct net_device *netdev, return 0; } +static void atl1c_set_max_mtu(struct net_device *netdev) +{ + struct atl1c_adapter *adapter = netdev_priv(netdev); + struct atl1c_hw *hw = &adapter->hw; + + switch (hw->nic_type) { + /* These (GbE) devices support jumbo packets, max_mtu 6122 */ + case athr_l1c: + case athr_l1d: + case athr_l1d_2: + netdev->max_mtu = MAX_JUMBO_FRAME_SIZE - + (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); + break; + /* The 10/100 devices don't support jumbo packets, max_mtu 1500 */ + default: + netdev->max_mtu = ETH_DATA_LEN; + break; + } +} + /** * atl1c_change_mtu - Change the Maximum Transfer Unit * @netdev: network interface device structure @@ -529,22 +549,9 @@ static int atl1c_set_features(struct net_device *netdev, static int atl1c_change_mtu(struct net_device *netdev, int new_mtu) { struct atl1c_adapter *adapter = netdev_priv(netdev); - struct atl1c_hw *hw = &adapter->hw; - int old_mtu = netdev->mtu; - int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN; - - /* Fast Ethernet controller doesn't support jumbo packet */ - if (((hw->nic_type == athr_l2c || - hw->nic_type == athr_l2c_b || - hw->nic_type == athr_l2c_b2) && new_mtu > ETH_DATA_LEN) || - max_frame < ETH_ZLEN + ETH_FCS_LEN || - max_frame > MAX_JUMBO_FRAME_SIZE) { - if (netif_msg_link(adapter)) - dev_warn(&adapter->pdev->dev, "invalid MTU setting\n"); - return -EINVAL; - } + /* set MTU */ - if (old_mtu != new_mtu && netif_running(netdev)) { + if (netif_running(netdev)) { while (test_and_set_bit(__AT_RESETTING, &adapter->flags)) msleep(1); netdev->mtu = new_mtu; @@ -2511,6 +2518,7 @@ static int atl1c_init_netdev(struct net_device *netdev, struct pci_dev *pdev) netdev->netdev_ops = &atl1c_netdev_ops; netdev->watchdog_timeo = AT_TX_WATCHDOG; + netdev->min_mtu = ETH_ZLEN - (ETH_HLEN + VLAN_HLEN); atl1c_set_ethtool_ops(netdev); /* TODO: add when ready */ @@ -2613,6 +2621,9 @@ static int atl1c_probe(struct pci_dev *pdev, const struct pci_device_id *ent) dev_err(&pdev->dev, "net device private data init failed\n"); goto err_sw_init; } + /* set max MTU */ + atl1c_set_max_mtu(netdev); + atl1c_reset_pcie(&adapter->hw, ATL1C_PCIE_L0S_L1_DISABLE); /* Init GPHY as early as possible due to power saving issue */ |