[PATCH RFC 07/15] SUNRPC: Refactor rpc_call_null_helper()

[Chuck Lever <chuck.lever@xxxxxxxxxx>]

We need to use RPC_TASK_TLSCRED instead of RPC_TASK_NULLCREDS in one
upcoming case.

Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---
 net/sunrpc/clnt.c |   15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 3d3be55205bb..3fb601d8a531 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -2734,8 +2734,7 @@ struct rpc_task *rpc_call_null_helper(struct rpc_clnt *clnt,
 		.rpc_op_cred = cred,
 		.callback_ops = ops ?: &rpc_null_ops,
 		.callback_data = data,
-		.flags = flags | RPC_TASK_SOFT | RPC_TASK_SOFTCONN |
-			 RPC_TASK_NULLCREDS,
+		.flags = flags | RPC_TASK_SOFT | RPC_TASK_SOFTCONN,
 	};
 
 	return rpc_run_task(&task_setup_data);
@@ -2743,7 +2742,8 @@ struct rpc_task *rpc_call_null_helper(struct rpc_clnt *clnt,
 
 struct rpc_task *rpc_call_null(struct rpc_clnt *clnt, struct rpc_cred *cred, int flags)
 {
-	return rpc_call_null_helper(clnt, NULL, cred, flags, NULL, NULL);
+	return rpc_call_null_helper(clnt, NULL, cred, flags | RPC_TASK_NULLCREDS,
+				    NULL, NULL);
 }
 EXPORT_SYMBOL_GPL(rpc_call_null);
 
@@ -2821,9 +2821,11 @@ int rpc_clnt_test_and_add_xprt(struct rpc_clnt *clnt,
 		goto success;
 	}
 
-	task = rpc_call_null_helper(clnt, xprt, NULL, RPC_TASK_ASYNC,
-			&rpc_cb_add_xprt_call_ops, data);
+	task = rpc_call_null_helper(clnt, xprt, NULL,
+				    RPC_TASK_ASYNC | RPC_TASK_NULLCREDS,
+				    &rpc_cb_add_xprt_call_ops, data);
 	data->xps->xps_nunique_destaddr_xprts++;
+
 	rpc_put_task(task);
 success:
 	return 1;
@@ -2864,7 +2866,8 @@ int rpc_clnt_setup_test_and_add_xprt(struct rpc_clnt *clnt,
 		goto out_err;
 
 	/* Test the connection */
-	task = rpc_call_null_helper(clnt, xprt, NULL, 0, NULL, NULL);
+	task = rpc_call_null_helper(clnt, xprt, NULL, RPC_TASK_NULLCREDS,
+				    NULL, NULL);
 	if (IS_ERR(task)) {
 		status = PTR_ERR(task);
 		goto out_err;