[PATCH] CMD: random: fix return code

[Eugeniy Paltsev]

As of today 'random' command return 1 (CMD_RET_FAILURE) in case
of successful execution and 0 (CMD_RET_SUCCESS) in case of bad
arguments. Fix that.

NOTE: we remove printing usage information from command body
so it won't print twice.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev at synopsys.com>
---
 cmd/mem.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/cmd/mem.c b/cmd/mem.c
index 6d54f195272..6b4897dfd94 100644
--- a/cmd/mem.c
+++ b/cmd/mem.c
@@ -1102,10 +1102,8 @@ static int do_random(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 	unsigned char *buf8;
 	unsigned int i;
 
-	if (argc < 3 || argc > 4) {
-		printf("usage: %s <addr> <len> [<seed>]\n", argv[0]);
-		return 0;
-	}
+	if (argc < 3 || argc > 4)
+		return CMD_RET_USAGE;
 
 	len = simple_strtoul(argv[2], NULL, 16);
 	addr = simple_strtoul(argv[1], NULL, 16);
@@ -1132,7 +1130,8 @@ static int do_random(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 
 	unmap_sysmem(start);
 	printf("%lu bytes filled with random data\n", len);
-	return 1;
+
+	return CMD_RET_SUCCESS;
 }
 #endif
 
-- 
2.21.1