2012/2/24 Danny Kukawka [off-list ref]:

Second Part of series patches to unifiy the return value of
.ndo_set_mac_address if the given address isn't valid.

These changes check if a given (MAC) address is valid in
.ndo_set_mac_address, if invalid return -EADDRNOTAVAIL
as eth_mac_addr() already does if is_valid_ether_addr() fails.

Why not just fix dev_set_mac_address() and make do_setlink() use that?
Checks are specific to address family, not device model I assume.

Best Regards,
Michał Mirosław