Nothing in the codebase saves the notify ID when calling
qmi_service_register.  Nothing, therefore ever calls
qmi_service_unregister, either.
---
 drivers/qmimodem/qmi.c | 43 +++----------------------------------------
 drivers/qmimodem/qmi.h |  3 +--
 2 files changed, 4 insertions(+), 42 deletions(-)

diff --git a/drivers/qmimodem/qmi.c b/drivers/qmimodem/qmi.c
index 6cc858be..5ed41e0a 100644
--- a/drivers/qmimodem/qmi.c
+++ b/drivers/qmimodem/qmi.c
@@ -85,7 +85,6 @@ struct qmi_service {
 	uint16_t major;
 	uint16_t minor;
 	uint8_t client_id;
-	uint16_t next_notify_id;
 	GList *notify_list;
 };
 
@@ -112,7 +111,6 @@ struct qmi_request {
 };
 
 struct qmi_notify {
-	uint16_t id;
 	uint16_t message;
 	qmi_result_func_t callback;
 	void *user_data;
@@ -266,14 +264,6 @@ static void __notify_free(gpointer data, gpointer user_data)
 	g_free(notify);
 }
 
-static gint __notify_compare(gconstpointer a, gconstpointer b)
-{
-	const struct qmi_notify *notify = a;
-	uint16_t id = GPOINTER_TO_UINT(b);
-
-	return notify->id - id;
-}
-
 static gboolean __service_compare_shared(gpointer key, gpointer value,
 							gpointer user_data)
 {
@@ -2338,23 +2328,19 @@ bool qmi_service_cancel_all(struct qmi_service *service)
 	return true;
 }
 
-uint16_t qmi_service_register(struct qmi_service *service,
+bool qmi_service_register(struct qmi_service *service,
 				uint16_t message, qmi_result_func_t func,
 				void *user_data, qmi_destroy_func_t destroy)
 {
 	struct qmi_notify *notify;
 
 	if (!service || !func)
-		return 0;
+		return false;
 
 	notify = g_try_new0(struct qmi_notify, 1);
 	if (!notify)
-		return 0;
-
-	if (service->next_notify_id < 1)
-		service->next_notify_id = 1;
+		return false;
 
-	notify->id = service->next_notify_id++;
 	notify->message = message;
 	notify->callback = func;
 	notify->user_data = user_data;
@@ -2362,29 +2348,6 @@ uint16_t qmi_service_register(struct qmi_service *service,
 
 	service->notify_list = g_list_append(service->notify_list, notify);
 
-	return notify->id;
-}
-
-bool qmi_service_unregister(struct qmi_service *service, uint16_t id)
-{
-	unsigned int nid = id;
-	struct qmi_notify *notify;
-	GList *list;
-
-	if (!service || !id)
-		return false;
-
-	list = g_list_find_custom(service->notify_list,
-				GUINT_TO_POINTER(nid), __notify_compare);
-	if (!list)
-		return false;
-
-	notify = list->data;
-
-	service->notify_list = g_list_delete_link(service->notify_list, list);
-
-	__notify_free(notify, NULL);
-
 	return true;
 }
 
diff --git a/drivers/qmimodem/qmi.h b/drivers/qmimodem/qmi.h
index bb8eb4a0..2c0d5aff 100644
--- a/drivers/qmimodem/qmi.h
+++ b/drivers/qmimodem/qmi.h
@@ -172,8 +172,7 @@ uint16_t qmi_service_send(struct qmi_service *service,
 				void *user_data, qmi_destroy_func_t destroy);
 bool qmi_service_cancel_all(struct qmi_service *service);
 
-uint16_t qmi_service_register(struct qmi_service *service,
+bool qmi_service_register(struct qmi_service *service,
 				uint16_t message, qmi_result_func_t func,
 				void *user_data, qmi_destroy_func_t destroy);
-bool qmi_service_unregister(struct qmi_service *service, uint16_t id);
 bool qmi_service_unregister_all(struct qmi_service *service);
-- 
2.15.1