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-rw-r--r--common/cmd_mii.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/common/cmd_mii.c b/common/cmd_mii.c
index 48a4e77..ee5e43e 100644
--- a/common/cmd_mii.c
+++ b/common/cmd_mii.c
@@ -57,6 +57,11 @@ int do_mii (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
int rcode = 0;
char *devname;
+ if (argc < 2) {
+ printf ("Usage:\n%s\n", cmdtp->usage);
+ return 1;
+ }
+
#if defined(CONFIG_8xx) || defined(CONFIG_MCF52x2)
mii_init ();
#endif