From 6877f54e6a3326c99aaf84b7bff6a3019da0b847 Mon Sep 17 00:00:00 2001 From: Prabhanjan Sarnaik Date: Thu, 18 Jun 2009 11:35:02 +0000 Subject: [PATCH] mv643xx_eth: fix unicast filter programming in promiscuous mode 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 Signed-off-by: Prabhanjan Sarnaik Tested-by: Siddarth Gore Tested-by: Mahavir Jain Signed-off-by: Lennert Buytenhek Cc: stable@kernel.org Signed-off-by: David S. Miller --- drivers/net/mv643xx_eth.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index 745ae8b4..0f32db3 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -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); } -- 2.7.4