Commit f277e65e authored by Göran Weinholt's avatar Göran Weinholt Committed by David S. Miller
Browse files

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: default avatarGöran Weinholt <weinholt@csbnet.se>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9b3de1ef

drivers/net/smsc911x.c

+5 −0
Original line number Diff line number Diff line
@@ -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_) &&