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>
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@ -1178,6 +1178,11 @@ static int smsc911x_open(struct net_device *dev)
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smsc911x_reg_write(pdata, HW_CFG, 0x00050000);
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smsc911x_reg_write(pdata, AFC_CFG, 0x006E3740);
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/* Increase the legal frame size of VLAN tagged frames to 1522 bytes */
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spin_lock_irq(&pdata->mac_lock);
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smsc911x_mac_write(pdata, VLAN1, ETH_P_8021Q);
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spin_unlock_irq(&pdata->mac_lock);
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/* Make sure EEPROM has finished loading before setting GPIO_CFG */
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timeout = 50;
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while ((smsc911x_reg_read(pdata, E2P_CMD) & E2P_CMD_EPC_BUSY_) &&
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