The rdma core is taking care of return the right error code when the
rdma device callbacks aren't supported.
Signed-off-by: NKamal Heib <kamalheib1@gmail.com>
Acked-by: NShiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>