diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index 66cb043ddd49d8b3389505ede540302cc8777367..f1dd0ca34d833f971065a1f348cc03c99790b31a 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -1379,6 +1379,9 @@ static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
 
 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
 {
+	if (addr->sa_family == AF_IB)
+		return ((struct sockaddr_ib *) addr)->sib_sid;
+
 	return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
 }