diff options
Diffstat (limited to 'drivers/net/e1000/e1000_main.c')
| -rw-r--r-- | drivers/net/e1000/e1000_main.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c index 6603bd13906..58561a4955e 100644 --- a/drivers/net/e1000/e1000_main.c +++ b/drivers/net/e1000/e1000_main.c @@ -2978,6 +2978,7 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu) { struct e1000_adapter *adapter = netdev_priv(netdev); int max_frame = new_mtu + ENET_HEADER_SIZE + ETHERNET_FCS_SIZE; + uint16_t eeprom_data = 0; if ((max_frame < MINIMUM_ETHERNET_FRAME_SIZE) || (max_frame > MAX_JUMBO_FRAME_SIZE)) { @@ -2989,12 +2990,25 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu) switch (adapter->hw.mac_type) { case e1000_82542_rev2_0: case e1000_82542_rev2_1: - case e1000_82573: if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) { DPRINTK(PROBE, ERR, "Jumbo Frames not supported.\n"); return -EINVAL; } break; + case e1000_82573: + /* only enable jumbo frames if ASPM is disabled completely + * this means both bits must be zero in 0x1A bits 3:2 */ + e1000_read_eeprom(&adapter->hw, EEPROM_INIT_3GIO_3, 1, + &eeprom_data); + if (eeprom_data & EEPROM_WORD1A_ASPM_MASK) { + if (max_frame > MAXIMUM_ETHERNET_FRAME_SIZE) { + DPRINTK(PROBE, ERR, + "Jumbo Frames not supported.\n"); + return -EINVAL; + } + break; + } + /* fall through to get support */ case e1000_82571: case e1000_82572: #define MAX_STD_JUMBO_FRAME_SIZE 9234 |