[Patch] infiniband: check local reserved ports

[Amerigo Wang <amwang@redhat.com>]

Since Tetsuo's patch already got merged, now this is the missing part
for local port reservation.

Cc: Roland Dreier <rdreier@cisco.com>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Signed-off-by: WANG Cong <amwang@redhat.com>

---
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index b930b81..7b89bab 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -1978,6 +1978,7 @@ static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
 	rover = net_random() % remaining + low;
 retry:
 	if (last_used_port != rover &&
+	    !inet_is_reserved_local_port(rover) &&
 	    !idr_find(ps, (unsigned short) rover)) {
 		int ret = cma_alloc_port(ps, id_priv, rover);
 		/*