From: Lennert Buytenhek Date: Fri, 13 Mar 2009 22:48:02 +0000 (-0700) Subject: mv643xx_eth: fix unicast address filter corruption on mtu change X-Git-Tag: firefly_0821_release~15263^2~29 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=5a89392225c6147d10328a64b06b756561e97edf;p=firefly-linux-kernel-4.4.55.git mv643xx_eth: fix unicast address filter corruption on mtu change When mv643xx_eth_open() is called to up an interface, port_start() will first re-program the unicast address filter, and then re-initialise the PORT_CONFIG register, but that will disable unicast promiscuous mode if it was enabled by the unicast address filter setup. This isn't a problem on ifconfig up, as ->set_rx_mode() will be called shortly afterwards which will program the filters again, but it does trigger when changing the MTU, which calls mv643xx_eth_stop() and then mv643xx_eth_open() by hand to repopulate the receive rings with skbuffs of the new size. Swap the initialisation of the PORT_START register and the call to the unicast filter setup function to fix this. Signed-off-by: Lennert Buytenhek Signed-off-by: David S. Miller --- diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index 13f11f402a99..b0bc3bc18e9c 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -2029,11 +2029,6 @@ static void port_start(struct mv643xx_eth_private *mp) txq_set_fixed_prio_mode(txq); } - /* - * Add configured unicast address to address filter table. - */ - mv643xx_eth_program_unicast_filter(mp->dev); - /* * Receive all unmatched unicast, TCP, UDP, BPDU and broadcast * frames to RX queue #0, and include the pseudo-header when @@ -2046,6 +2041,11 @@ static void port_start(struct mv643xx_eth_private *mp) */ wrlp(mp, PORT_CONFIG_EXT, 0x00000000); + /* + * Add configured unicast addresses to address filter table. + */ + mv643xx_eth_program_unicast_filter(mp->dev); + /* * Enable the receive queues. */