Do it in a same way we do it in spectrum. Check if port is usable first
and only in that case create a port instance.
Signed-off-by: NJiri Pirko <jiri@mellanox.com>
Reviewed-by: NElad Raz <eladr@mellanox.com>
Reviewed-by: NIdo Schimmel <idosch@mellanox.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>