From: chenzhipeng <chenzhipeng@eswincomputing.com>
Date: Tue, 6 Dec 2022 09:24:38 +0000 (+0800)
Subject: cmd: spi: Judge the number of added parameters
X-Git-Url: http://git.dujemihanovic.xyz/img/sics.gif?a=commitdiff_plain;h=c40e021b83d9db9aec736a0cb992fd84d2e63c02;p=u-boot.git

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>
---

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);