all: cleanup switch fall-through comments for -Wimplicit-fallthrough warning

The -Wimplicit-fallthrough=3 warning is quite flexible of accepting
a fall-through warning.

Some comments were missing or not detected correctly.

Thereby, also change all other comments to follow the exact
same pattern.

(cherry picked from commit 7c6c8f0d8b)

libnm-core/nm-utils.c

@@ -1070,7 +1070,7 @@ nm_utils_security_valid (NMUtilsSecurityType type,
 	case NMU_SEC_LEAP: /* require PRIVACY bit for LEAP? */
 		if (adhoc)
 			return FALSE;
-		/* Fall through */
+		/* fall through */
 	case NMU_SEC_STATIC_WEP:
 		g_assert (have_ap);
 		if (!(ap_flags & NM_802_11_AP_FLAGS_PRIVACY))

libnm-util/nm-utils.c

@@ -697,7 +697,7 @@ nm_utils_security_valid (NMUtilsSecurityType type,
 	case NMU_SEC_LEAP: /* require PRIVACY bit for LEAP? */
 		if (adhoc)
 			return FALSE;
-		/* Fall through */
+		/* fall through */
 	case NMU_SEC_STATIC_WEP:
 		g_assert (have_ap);
 		if (!(ap_flags & NM_802_11_AP_FLAGS_PRIVACY))

libnm/nm-vpn-service-plugin.c

@@ -217,7 +217,7 @@ nm_vpn_service_plugin_disconnect (NMVpnServicePlugin *plugin, GError **err)
 		break;
 	case NM_VPN_SERVICE_STATE_STARTING:
 		_emit_failure (plugin, NM_VPN_PLUGIN_FAILURE_CONNECT_FAILED);
-		/* fallthru */
+		/* fall through */
 	case NM_VPN_SERVICE_STATE_STARTED:
 		nm_vpn_service_plugin_set_state (plugin, NM_VPN_SERVICE_STATE_STOPPING);
 		ret = NM_VPN_SERVICE_PLUGIN_GET_CLASS (plugin)->disconnect (plugin, err);

src/devices/nm-device-ethernet.c

@@ -1171,7 +1171,7 @@ dcb_state (NMDevice *device, gboolean timeout)
 			break;
 		}
 		_LOGD (LOGD_DCB, "dcb_state() preconfig down falling through");
-		/* carrier never went down? fall through */
+		/* fall through */
 	case DCB_WAIT_CARRIER_PRECONFIG_UP:
 		if (timeout || carrier) {
 			_LOGD (LOGD_DCB, "dcb_state() preconfig up configuring DCB");
@@ -1195,7 +1195,7 @@ dcb_state (NMDevice *device, gboolean timeout)
 			break;
 		}
 		_LOGD (LOGD_DCB, "dcb_state() postconfig down falling through");
-		/* carrier never went down? fall through */
+		/* fall through */
 	case DCB_WAIT_CARRIER_POSTCONFIG_UP:
 		if (timeout || carrier) {
 			_LOGD (LOGD_DCB, "dcb_state() postconfig up starting IP");

src/devices/nm-device.c

@@ -5340,7 +5340,7 @@ dhcp4_state_changed (NMDhcpClient *client,
 		/* Ignore expiry before we even have a lease (NAK, old lease, etc) */
 		if (priv->ip4_state == IP_CONF)
 			break;
-		/* Fall through */
+		/* fall through */
 	case NM_DHCP_STATE_DONE:
 	case NM_DHCP_STATE_FAIL:
 		dhcp4_fail (self, FALSE);
@@ -6159,7 +6159,7 @@ dhcp6_state_changed (NMDhcpClient *client,
 		 */
 		if (priv->dhcp6.mode == NM_NDISC_DHCP_LEVEL_OTHERCONF)
 			break;
-		/* Otherwise, fall through */
+		/* fall through */
 	case NM_DHCP_STATE_FAIL:
 		dhcp6_fail (self, FALSE);
 		break;
@@ -10336,7 +10336,7 @@ device_ipx_changed (NMPlatform *platform,
 			priv->dad6_failed_addrs = g_slist_append (priv->dad6_failed_addrs,
 			                                          g_memdup (addr, sizeof (NMPlatformIP6Address)));
 		}
-		/* fallthrough */
+		/* fall through */
 	case NMP_OBJECT_TYPE_IP6_ROUTE:
 		if (nm_device_get_unmanaged_flags (self, NM_UNMANAGED_PLATFORM_INIT)) {
 			priv->queued_ip6_config_pending = TRUE;

src/devices/wwan/nm-modem-broadband.c

@@ -489,7 +489,6 @@ connect_context_step (NMModemBroadband *self)
 		}
 		ctx->step++;
 		/* fall through */
-
 	case CONNECT_STEP_WAIT_FOR_READY: {
 		GError *error = NULL;
 
@@ -527,9 +526,8 @@ connect_context_step (NMModemBroadband *self)
 		}
 
 		ctx->step++;
-		/* fall through */
 	}
-
+		/* fall through */
 	case CONNECT_STEP_CONNECT:
 		if (ctx->ip_types_i < ctx->ip_types->len) {
 			NMModemIPType current;

src/devices/wwan/nm-modem.c

@@ -1127,8 +1127,7 @@ deactivate_step (DeactivateContext *ctx)
 	switch (ctx->step) {
 	case DEACTIVATE_CONTEXT_STEP_FIRST:
 		ctx->step++;
-		/* Fall down */
-
+		/* fall through */
 	case DEACTIVATE_CONTEXT_STEP_CLEANUP:
 		/* Make sure we keep a ref to the PPP manager if there is one */
 		if (priv->ppp_manager)
@@ -1136,8 +1135,7 @@ deactivate_step (DeactivateContext *ctx)
 		/* Run cleanup */
 		NM_MODEM_GET_CLASS (ctx->self)->deactivate_cleanup (ctx->self, ctx->device);
 		ctx->step++;
-		/* Fall down */
-
+		/* fall through */
 	case DEACTIVATE_CONTEXT_STEP_PPP_MANAGER_STOP:
 		/* If we have a PPP manager, stop it */
 		if (ctx->ppp_manager) {
@@ -1148,8 +1146,7 @@ deactivate_step (DeactivateContext *ctx)
 			return;
 		}
 		ctx->step++;
-		/* Fall down */
-
+		/* fall through */
 	case DEACTIVATE_CONTEXT_STEP_MM_DISCONNECT:
 		/* Disconnect asynchronously */
 		NM_MODEM_GET_CLASS (ctx->self)->disconnect (ctx->self,

src/dns/nm-dns-manager.c

@@ -1566,7 +1566,7 @@ _check_resconf_immutable (NMDnsManagerResolvConfManager rc_manager)
 	case NM_DNS_MANAGER_RESOLV_CONF_MAN_UNKNOWN:
 	case NM_DNS_MANAGER_RESOLV_CONF_MAN_IMMUTABLE:
 		nm_assert_not_reached ();
-		/* fall-through */
+		/* fall through */
 	case NM_DNS_MANAGER_RESOLV_CONF_MAN_UNMANAGED:
 		return NM_DNS_MANAGER_RESOLV_CONF_MAN_UNMANAGED;
 	default:
@@ -1586,7 +1586,7 @@ _check_resconf_immutable (NMDnsManagerResolvConfManager rc_manager)
 			case NM_DNS_MANAGER_RESOLV_CONF_MAN_UNMANAGED:
 			case NM_DNS_MANAGER_RESOLV_CONF_MAN_IMMUTABLE:
 				nm_assert_not_reached ();
-				/* fall-through */
+				/* fall through */
 			case NM_DNS_MANAGER_RESOLV_CONF_MAN_FILE:
 			case NM_DNS_MANAGER_RESOLV_CONF_MAN_RESOLVCONF:
 			case NM_DNS_MANAGER_RESOLV_CONF_MAN_NETCONFIG:

src/nm-config.c

@@ -1046,6 +1046,7 @@ _string_append_val (GString *str, const char *value)
 		case '#':
 		case ':':
 			g_string_append_c (str, '+');
+			/* fall through */
 		default:
 			g_string_append_c (str, *value);
 		}

src/tests/test-general.c

@@ -1291,7 +1291,7 @@ test_nm_utils_strbuf_append (void)
 					nm_utils_strbuf_append_c (&t_buf, &t_len, str[0]);
 					break;
 				}
-				/* fall-through */
+				/* fall through */
 			case 1:
 				nm_utils_strbuf_append_str (&t_buf, &t_len, str);
 				break;
@@ -1300,7 +1300,7 @@ test_nm_utils_strbuf_append (void)
 					nm_utils_strbuf_append (&t_buf, &t_len, "%c", str[0]);
 					break;
 				}
-				/* fall-through */
+				/* fall through */
 			case 3:
 				nm_utils_strbuf_append (&t_buf, &t_len, "%s", str);
 				break;

src/vpn/nm-vpn-connection.c

@@ -637,7 +637,7 @@ _set_vpn_state (NMVpnConnection *self,
 		/* Tear down and clean up the connection */
 		call_plugin_disconnect (self);
 		vpn_cleanup (self, parent_dev);
-		/* Fall through */
+		/* fall through */
 	default:
 		priv->secrets_idx = SECRETS_REQ_SYSTEM;
 		break;
@@ -1514,7 +1514,7 @@ nm_vpn_connection_ip4_config_get (NMVpnConnection *self, GVariant *dict)
 			switch (g_variant_n_children (v)) {
 			case 5:
 				g_variant_get_child (v, 4, "u", &route.pref_src);
-				/* fallthrough */
+				/* fall through */
 			case 4:
 				g_variant_get_child (v, 0, "u", &route.network);
 				g_variant_get_child (v, 1, "u", &plen);