diff --git a/drivers/infiniband/core/nldev.c b/drivers/infiniband/core/nldev.c
index c90f6378d839..f7689bc10d14 100644
--- a/drivers/infiniband/core/nldev.c
+++ b/drivers/infiniband/core/nldev.c
@@ -541,7 +541,7 @@ static int fill_res_cm_id_entry(struct sk_buff *msg, bool has_cap_net_admin,
 	struct rdma_cm_id *cm_id = &id_priv->id;
 
 	if (port && port != cm_id->port_num)
-		return 0;
+		return -EAGAIN;
 
 	if (cm_id->port_num &&
 	    nla_put_u32(msg, RDMA_NLDEV_ATTR_PORT_INDEX, cm_id->port_num))