We need a port state cache in ib_core, later we will use in rdma_cm.
Signed-off-by: NJack Wang <jinpu.wang@profitbricks.com>
Reviewed-by: NMichael Wang <yun.wang@profitbricks.com>
Acked-by: NSean Hefty <sean.hefty@intel.com>
Signed-off-by: NDoug Ledford <dledford@redhat.com>