[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 --- 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);