Returns -46 for the MAC being passed as argument

dev: eth1 ioctl: 0x89f0
   cmd: 127 buf: 0x7fff7cec len: 12
   send: -> A87EFF7F 001124C9 6E6E4100
   recv: -> C8FFFFFF 001124C9 6E6E4100
   ret: 0

Here is an empty result (with no MAC)

dev: eth1 ioctl: 0x89f0
   cmd: 127 buf: 0x7fff7cec len: 12
   send: -> A87EFF7F 00000000 00004100
   recv: -> A87EFF7F 00000000 00004100
   ret: -22