This patch changes when we decide what the device's MAC address
is from per ifconfig up to once when the device is connected.
Without this patch, a manually forced device MAC is overwritten
on ifconfig down/up. Also devices that have no EEPROM are
assigned a new random address on ifconfig down/up instead of
persisting the same one.
Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net> Reported-by: Robert Cunningham <rcunningham@nsmsurveillance.com> Cc: Bjorn Mork <bjorn@mork.no> Cc: Dan Williams <dcbw@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>