staging: most: core: track aim modules with linked list

The core needs to know what modules are registered. This patch makes the
core keep track of the registered modules.
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/most/core.c

@@ -1294,8 +1294,8 @@ int most_register_aim(struct most_aim *aim)
 		pr_err("registering device %s failed\n", aim->name);
 		return ret;
 	}
-	pr_info("registered new application interfacing module %s\n",
-		aim->name);
+	list_add_tail(&aim->list, &mc.mod_list);
+	pr_info("registered new application interfacing module %s\n", aim->name);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(most_register_aim);
@@ -1326,6 +1326,7 @@ int most_deregister_aim(struct most_aim *aim)
 		}
 	}
 	device_unregister(&aim->dev);
+	list_del(&aim->list);
 	pr_info("deregistering application interfacing module %s\n", aim->name);
 	return 0;
 }
@@ -1545,6 +1546,7 @@ static int __init most_init(void)
 
 	pr_info("init()\n");
 	INIT_LIST_HEAD(&instance_list);
+	INIT_LIST_HEAD(&mc.mod_list);
 	ida_init(&mdev_id);
 
 	mc.bus.name = "most",

drivers/staging/most/core.h

@@ -263,6 +263,7 @@ struct most_interface {
  */
 struct most_aim {
 	struct device dev;
+	struct list_head list;
 	const char *name;
 	int (*probe_channel)(struct most_interface *iface, int channel_idx,
 			     struct most_channel_config *cfg, char *name);