diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c
index dab2a96ea032ef72b3291358b7328ec58202b0f4..5ed6ec9d6a93ad9276f79799750d8458c2f06266 100644
--- a/drivers/infiniband/core/cma.c
+++ b/drivers/infiniband/core/cma.c
@@ -3683,6 +3683,9 @@ static int cma_accept_iw(struct rdma_id_private *id_priv,
 	struct iw_cm_conn_param iw_param;
 	int ret;
 
+	if (!conn_param)
+		return -EINVAL;
+
 	ret = cma_modify_qp_rtr(id_priv, conn_param);
 	if (ret)
 		return ret;