RDMA/cxgb4: Cap CQ size at T4_MAX_IQ_SIZE

Signed-off-by: NSteve Wise <swise@opengridcomputing.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>

drivers/infiniband/hw/cxgb4/cq.c

@@ -881,7 +881,7 @@ struct ib_cq *c4iw_create_cq(struct ib_device *ibdev, int entries,
 	/*
 	 * Make actual HW queue 2x to avoid cdix_inc overflows.
 	 */
-	hwentries = entries * 2;
+	hwentries = min(entries * 2, T4_MAX_IQ_SIZE);
 
 	/*
 	 * Make HW queue at least 64 entries so GTS updates aren't too