diff options
| author | Göran Weinholt <weinholt@csbnet.se> | 2011-03-02 07:07:21 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-07 23:30:12 +0300 |
| commit | f277e65e7a2d360189f760baca42f3ca2f62dd7a (patch) | |
| tree | 6d6cdfe42ad1b7b687ed18d870db95af4982bd1b | |
| parent | 9b3de1ef1ba0aa1129a9f857f07a6a97d954c6fd (diff) | |
| download | linux-f277e65e7a2d360189f760baca42f3ca2f62dd7a.tar.xz | |
net/smsc911x.c: Set the VLAN1 register to fix VLAN MTU problem
The smsc911x driver would drop frames longer than 1518 bytes, which is a
problem for networks with VLAN tagging. The VLAN1 tag register is used
to increase the legal frame size to 1522 when a VLAN tag is identified.
Signed-off-by: Göran Weinholt <weinholt@csbnet.se>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/smsc911x.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/smsc911x.c b/drivers/net/smsc911x.c index 64bfdae5956f..d70bde95460b 100644 --- a/drivers/net/smsc911x.c +++ b/drivers/net/smsc911x.c @@ -1178,6 +1178,11 @@ static int smsc911x_open(struct net_device *dev) smsc911x_reg_write(pdata, HW_CFG, 0x00050000); smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740); + /* Increase the legal frame size of VLAN tagged frames to 1522 bytes */ + spin_lock_irq(&pdata->mac_lock); + smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q); + spin_unlock_irq(&pdata->mac_lock); + /* Make sure EEPROM has finished loading before setting GPIO_CFG */ timeout = 50; while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) && |