app/parse: add default return value for app parse function

Change-Id: Icae46bb96502c7edf3a453e0fff1d8560241c5ab
Signed-off-by: Chunyang Hui <chunyang.hui@intel.com>
Reviewed-on: https://review.gerrithub.io/c/441277
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>

app/iscsi_tgt/iscsi_tgt.c

@@ -79,8 +79,7 @@ iscsi_parse_arg(int ch, char *arg)
 		g_daemon_mode = 1;
 		break;
 	default:
-		assert(false);
-		break;
+		return -EINVAL;
 	}
 	return 0;
 }

app/spdk_tgt/spdk_tgt.c

@@ -89,6 +89,8 @@ spdk_tgt_parse_arg(int ch, char *arg)
 		spdk_vhost_set_socket_path(arg);
 		break;
 #endif
+	default:
+		return -EINVAL;
 	}
 	return 0;
 }

app/vhost/vhost.c

@@ -72,6 +72,8 @@ vhost_parse_arg(int ch, char *arg)
 	case 'S':
 		spdk_vhost_set_socket_path(arg);
 		break;
+	default:
+		return -EINVAL;
 	}
 	return 0;
 }

examples/bdev/hello_world/hello_bdev.c

@@ -73,6 +73,8 @@ static int hello_bdev_parse_arg(int ch, char *arg)
 	case 'b':
 		g_bdev_name = arg;
 		break;
+	default:
+		return -EINVAL;
 	}
 	return 0;
 }

examples/sock/hello_world/hello_sock.c

@@ -105,6 +105,9 @@ static int hello_sock_parse_arg(int ch, char *arg)
 		break;
 	case 'V':
 		g_verbose = true;
+		break;
+	default:
+		return -EINVAL;
 	}
 	return 0;
 }

test/bdev/bdevperf/bdevperf.c

@@ -852,6 +852,8 @@ bdevperf_parse_arg(int ch, char *arg)
 		g_show_performance_period_in_usec = spdk_max(g_show_performance_period_in_usec,
 						    g_show_performance_period_in_usec);
 		break;
+	default:
+		return -EINVAL;
 	}
 	return 0;
 }

test/blobfs/mkfs/mkfs.c

@@ -113,7 +113,7 @@ mkfs_parse_arg(int ch, char *arg)
 		spdk_parse_capacity(arg, &g_cluster_size, &has_prefix);
 		break;
 	default:
-		break;
+		return -EINVAL;
 	}
 	return 0;
 }