Previously, cma_match_net_dev called cma_protocol_roce which
tried to verify that the IB device uses RoCE protocol. However,
if rdma_id wasn't bound to a port, then the check would occur
against the first port of the device without regard to whether
that port was even of the same type as the type of port the
incoming packet was received on.

Fix this by passing the port of the request and only checking
against the same port of the device.
Reported-by: NOr Gerlitz <gerlitz.or@gmail.com>
Fixes: b8cab5da ('IB/cma: Accept connection without a valid netdev on RoCE')
Signed-off-by: NMatan Barak <matanb@mellanox.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>