From c40e021b83d9db9aec736a0cb992fd84d2e63c02 Mon Sep 17 00:00:00 2001
From: chenzhipeng <chenzhipeng@eswincomputing.com>
Date: Tue, 6 Dec 2022 17:24:38 +0800
Subject: [PATCH] cmd: spi: Judge the number of added parameters
When only sspi is entered, help information can be printed.
Signed-off-by: chenzhipeng <chenzhipeng@eswincomputing.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
cmd/spi.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/cmd/spi.c b/cmd/spi.c
index 454ebe37d7..f30018f33b 100644
--- a/cmd/spi.c
+++ b/cmd/spi.c
@@ -112,6 +112,9 @@ int do_spi(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
if ((flag & CMD_FLAG_REPEAT) == 0)
{
+ if (argc < 2)
+ return CMD_RET_USAGE;
+
if (argc >= 2) {
mode = CONFIG_DEFAULT_SPI_MODE;
bus = dectoul(argv[1], &cp);
--
2.39.5