Hi,

I had no luck to obtain DHCP response when I changed the MAC address of eth0, which is created by sis190 module:

ifconfig eth0 down
ifconfig eth0 hw ether XX:XX:XX:XX:XX:XX
ifconfig eth0 up

<- this was ok, MAC is ok (ISP requires it), but dhclient eth0 no luck

The problem seems to be the check of MAC address in the hardware for Rx packets, sis190.c, function sis190_init_rxfilter().

static const struct net_device_ops sis190_netdev_ops = {
...
.ndo_set_mac_address    = eth_mac_addr,
...

but eth_mac_addr() does not call sis190_init_rxfilter() to change the MAC address check in the hardware. Probably it would be better to create a function like .ndo_set_mac_address = si190_set_mac_address, which would call both eth_mac_addr and sis190_init_rxfilter.

As a workaround I set eth0 to promiscuous mode, but that's not very cool :)

ifconfig eth0 promisc