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mv643xx_eth: fix unicast filter programming in promiscuous mode

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The Unicast Promiscious Mode (UPM) bit in the mv643xx_eth port
configuration register doesn't do exactly what its name would suggest:
setting this bit merely enables reception of all unicast frames with a
destination address that differs from our local MAC address in bits
[47:4].  In particular, it doesn't have any effect on unicast frames
with a destination address that matches our MAC address in bits [47:4]
-- these will still be tested against the 16-entry unicast address
filter table.

Therefore, if the interface is set to promiscuous mode, just setting
the unicast promiscuous bit isn't enough -- we need to set all filter
bits in the unicast filter table to 1 as well.

Reported-by: Sachin Sanap <ssanap@marvell.com>
Signed-off-by: Prabhanjan Sarnaik <sarnaik@marvell.com>
Tested-by: Siddarth Gore <gores@marvell.com>
Tested-by: Mahavir Jain <mjain@marvell.com>
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Cc: stable@kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Prabhanjan Sarnaik 2009-06-18 11:35:02 +00:00 committed by David S. Miller
parent 40c27eeac4
commit 6877f54e6a
1 changed files with 3 additions and 4 deletions
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7
drivers/net/mv643xx_eth.c
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@ -1750,12 +1750,12 @@ static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
uc_addr_set(mp, dev->dev_addr);
port_config = rdlp(mp, PORT_CONFIG);
port_config = rdlp(mp, PORT_CONFIG) & ~UNICAST_PROMISCUOUS_MODE;
nibbles = uc_addr_filter_mask(dev);
if (!nibbles) {
port_config |= UNICAST_PROMISCUOUS_MODE;
wrlp(mp, PORT_CONFIG, port_config);
return;
nibbles = 0xffff;
}
for (i = 0; i < 16; i += 4) {
@ -1776,7 +1776,6 @@ static void mv643xx_eth_program_unicast_filter(struct net_device *dev)
wrl(mp, off, v);
}
port_config &= ~UNICAST_PROMISCUOUS_MODE;
wrlp(mp, PORT_CONFIG, port_config);
}