plugin-manager: new defer-until-suggested support check result handling

'net' ports will be supported as soon as there is another port reporting
successful support.

src/mm-plugin-base.c

@@ -617,15 +617,18 @@ supports_port (MMPlugin *plugin,
     }
 
     /* Before launching any probing, check if the port is a net device (which
-     * cannot be probed). */
+     * cannot be probed).
+     * TODO: With the new defer-until-suggested we probably don't need the modem
+     * object being passed down here just for this. */
     if (g_str_equal (subsys, "net")) {
         /* If we already have a existing modem, then mark it as supported.
          * Otherwise, just defer a bit */
-        g_simple_async_result_set_op_res_gpointer (async_result,
-                                                   GUINT_TO_POINTER ((existing ?
-                                                                      MM_PLUGIN_SUPPORTS_PORT_SUPPORTED :
-                                                                      MM_PLUGIN_SUPPORTS_PORT_DEFER)),
-                                                   NULL);
+        g_simple_async_result_set_op_res_gpointer (
+            async_result,
+            GUINT_TO_POINTER ((existing ?
+                               MM_PLUGIN_SUPPORTS_PORT_SUPPORTED :
+                               MM_PLUGIN_SUPPORTS_PORT_DEFER_UNTIL_SUGGESTED)),
+            NULL);
         g_simple_async_result_complete_in_idle (async_result);
         goto out;
     }

src/mm-plugin-manager.c

@@ -271,6 +271,30 @@ supports_port_ready_cb (MMPlugin *plugin,
                                                  (GSourceFunc)find_port_support_idle,
                                                  info);
         break;
+
+    case MM_PLUGIN_SUPPORTS_PORT_DEFER_UNTIL_SUGGESTED:
+        /* We were told to defer until getting a suggested plugin, and we already
+         * got one here, so we're done. */
+        if (info->suggested_plugin) {
+            mm_dbg ("(%s): (%s) support check finished, got suggested",
+                    mm_plugin_get_name (MM_PLUGIN (info->suggested_plugin)),
+                    info->name);
+            info->best_plugin = info->suggested_plugin;
+            info->current = NULL;
+
+            /* Schedule checking support, which will end the operation */
+            info->source_id = g_idle_add ((GSourceFunc)find_port_support_idle,
+                                          info);
+        } else {
+            mm_dbg ("(%s): (%s) deferring support check until result suggested",
+                    mm_plugin_get_name (MM_PLUGIN (info->current->data)),
+                    info->name);
+            /* Schedule checking support */
+            info->source_id = g_timeout_add_seconds (SUPPORTS_DEFER_TIMEOUT_SECS,
+                                                     (GSourceFunc)find_port_support_idle,
+                                                     info);
+        }
+        break;
     }
 }
 
@@ -673,4 +697,3 @@ mm_plugin_manager_class_init (MMPluginManagerClass *manager_class)
     /* Virtual methods */
     object_class->finalize = finalize;
 }
-

src/mm-plugin.h

@@ -50,6 +50,7 @@ typedef void (*MMSupportsPortResultFunc) (MMPlugin *plugin,
 typedef enum {
     MM_PLUGIN_SUPPORTS_PORT_UNSUPPORTED = 0x0,
     MM_PLUGIN_SUPPORTS_PORT_DEFER,
+    MM_PLUGIN_SUPPORTS_PORT_DEFER_UNTIL_SUGGESTED,
     MM_PLUGIN_SUPPORTS_PORT_SUPPORTED
 } MMPluginSupportsResult;
 
@@ -137,4 +138,3 @@ MMBaseModem *mm_plugin_grab_port    (MMPlugin *plugin,
                                      GError **error);
 
 #endif /* MM_PLUGIN_H */
-