17 files changed, 30 insertions, 6 deletions
diff --git a/commands/boot.c b/commands/boot.c
index 8b3b407e12..102ca07980 100644
--- a/commands/boot.c
+++ b/commands/boot.c
@@ -53,6 +53,8 @@ static int do_boot(int argc, char *argv[])
 		case 'w':
 			boot_set_watchdog_timeout(simple_strtoul(optarg, NULL, 0));
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/bootm.c b/commands/bootm.c
index 61b9086a15..c7cbdbe0f4 100644
--- a/commands/bootm.c
+++ b/commands/bootm.c
@@ -97,7 +97,7 @@ static int do_bootm(int argc, char *argv[])
 			data.dryrun = 1;
 			break;
 		default:
-			break;
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/dhcp.c b/commands/dhcp.c
index eb98bfc2a7..4f4f5490c5 100644
--- a/commands/dhcp.c
+++ b/commands/dhcp.c
@@ -45,6 +45,8 @@ static int do_dhcp(int argc, char *argv[])
 		case 'r':
 			retries = simple_strtoul(optarg, NULL, 10);
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/fbtest.c b/commands/fbtest.c
index d070d1f7ab..bd0e140d07 100644
--- a/commands/fbtest.c
+++ b/commands/fbtest.c
@@ -137,6 +137,8 @@ static int do_fbtest(int argc, char *argv[])
 		case 'c':
 			color = simple_strtoul(optarg, NULL, 16);
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/hashsum.c b/commands/hashsum.c
index d05e571fb9..70aab2c4bf 100644
--- a/commands/hashsum.c
+++ b/commands/hashsum.c
@@ -42,6 +42,8 @@ static int do_hash(char *algo, int argc, char *argv[])
 			key = optarg;
 			keylen = strlen(key);
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/help.c b/commands/help.c
index 3d36d9bf48..819c40653c 100644
--- a/commands/help.c
+++ b/commands/help.c
@@ -98,6 +98,8 @@ static int do_help(int argc, char *argv[])
 		case 'a':
 			all = 1;
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/hwclock.c b/commands/hwclock.c
index 6a0fe0342a..5073618675 100644
--- a/commands/hwclock.c
+++ b/commands/hwclock.c
@@ -123,6 +123,8 @@ static int do_hwclock(int argc, char *argv[])
 			ntp_to_hw = 1;
 			ntpserver = optarg;
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/linux16.c b/commands/linux16.c
index bb678bdb83..db8d08105f 100644
--- a/commands/linux16.c
+++ b/commands/linux16.c
@@ -176,6 +176,8 @@ static int do_linux16(int argc, char *argv[])
 				}
 			}
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/loadb.c b/commands/loadb.c
index 6180ce371a..8c3906ca42 100644
--- a/commands/loadb.c
+++ b/commands/loadb.c
@@ -634,8 +634,7 @@ static int do_load_serial_bin(int argc, char *argv[])
 			console_dev_name = optarg;
 			break;
 		default:
-			perror(argv[0]);
-			return 1;
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/loadxy.c b/commands/loadxy.c
index a4b1bec94d..a2aab0fc85 100644
--- a/commands/loadxy.c
+++ b/commands/loadxy.c
@@ -67,8 +67,7 @@ static int do_loady(int argc, char *argv[])
 			cname = optarg;
 			break;
 		default:
-			perror(argv[0]);
-			return 1;
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/ls.c b/commands/ls.c
index ce02f16c49..331a4d2015 100644
--- a/commands/ls.c
+++ b/commands/ls.c
@@ -143,6 +143,8 @@ static int do_ls(int argc, char *argv[])
 		case 'l':
 			flags &= ~LS_COLUMN;
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/mem.c b/commands/mem.c
index 907f1f76a8..29eaa80b23 100644
--- a/commands/mem.c
+++ b/commands/mem.c
@@ -74,7 +74,7 @@ int mem_parse_options(int argc, char *argv[], char *optstr, int *mode,
 			*swab = 1;
 			break;
 		default:
-			return -1;
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/menutree.c b/commands/menutree.c
index ea5f65f3a1..cf37b01601 100644
--- a/commands/menutree.c
+++ b/commands/menutree.c
@@ -26,6 +26,8 @@ static int do_menutree(int argc, char *argv[])
 		case 'm':
 			path = optarg;
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/reset.c b/commands/reset.c
index 830048049a..6eac532623 100644
--- a/commands/reset.c
+++ b/commands/reset.c
@@ -34,6 +34,8 @@ static int cmd_reset(int argc, char *argv[])
 		case 'f':
 			shutdown_flag = 0;
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/splash.c b/commands/splash.c
index 15b296b680..2b70b29683 100644
--- a/commands/splash.c
+++ b/commands/splash.c
@@ -41,6 +41,8 @@ static int do_splash(int argc, char *argv[])
 		case 'y':
 			s.y = simple_strtoul(optarg, NULL, 0);
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/usb.c b/commands/usb.c
index 48c6619fde..9a23aa229d 100644
--- a/commands/usb.c
+++ b/commands/usb.c
@@ -123,6 +123,8 @@ static int do_usb(int argc, char *argv[])
 		case 's':
 			show = 1;
 			break;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}
 
diff --git a/commands/usbserial.c b/commands/usbserial.c
index e80b315250..ad6bc63fcc 100644
--- a/commands/usbserial.c
+++ b/commands/usbserial.c
@@ -44,6 +44,8 @@ static int do_usbserial(int argc, char *argv[])
 		case 'd':
 			usb_serial_unregister();
 			return 0;
+		default:
+			return COMMAND_ERROR_USAGE;
 		}
 	}