[PATCH 2/2] modem-manager: workaround issue in 'GDBusObjectManagerClient'

[Aleksander Morgado <aleksander lanedo com>]

The 'GDBusObjectManagerClient' won't signal added or removed objects when it
was created but no name owner was available in the bus. We can still use it for
name-owner changes, but in order to have added/removed object signals, we'll
need to re-create the whole 'MMManager' when we know the service came alive in
the bus.

See GLib/GIO/GDBus bug:
   https://bugzilla.gnome.org/show_bug.cgi?id=693285
---
 src/modem-manager/nm-modem-manager.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/modem-manager/nm-modem-manager.c b/src/modem-manager/nm-modem-manager.c
index ce74920..e0c6733 100644
--- a/src/modem-manager/nm-modem-manager.c
+++ b/src/modem-manager/nm-modem-manager.c
@@ -540,6 +540,7 @@ modem_manager_1_available (NMModemManager *self)
 
 static void schedule_modem_manager_1_relaunch (NMModemManager *self,
                                                guint n_seconds);
+static void ensure_client                     (NMModemManager *self);
 
 static void
 modem_manager_1_name_owner_changed (MMManager *modem_manager_1,
@@ -563,7 +564,18 @@ modem_manager_1_name_owner_changed (MMManager *modem_manager_1,
 
 	/* Available! */
 	g_free (name_owner);
-	modem_manager_1_available (self);
+
+	/* Hack alert: GDBusObjectManagerClient won't signal neither 'object-added'
+	 * nor 'object-removed' if it was created while there was no ModemManager in
+	 * the bus. This hack avoids this issue until we get a GIO with the fix
+	 * included... */
+	modem_manager_1_clear_signals (self);
+	g_clear_object (&self->priv->modem_manager_1);
+	ensure_client (self);
+
+	/* Whenever GDBusObjectManagerClient is fixed, we can just do the following:
+	 * modem_manager_1_available (self);
+	 */
 }
 
 static void
-- 
1.8.1