suspend: invalidate and remove modems on suspend, reprobe on resume

configure.ac

@@ -157,11 +157,16 @@ if test "x$with_suspend_resume" = "x"; then
 fi
 
 case $with_suspend_resume in
-    none) ;;
-    upower) ;;
+    none)
+        AC_DEFINE(WITH_SUSPEND_RESUME, 0, [Define if you have suspend-resume support])
+        ;;
+    upower)
+        AC_DEFINE(WITH_SUSPEND_RESUME, 1, [Define if you have suspend-resume support])
+        ;;
     systemd)
         PKG_CHECK_MODULES(SYSTEMD_INHIBIT, [libsystemd >= 209],,
                           [PKG_CHECK_MODULES(SYSTEMD_INHIBIT, [libsystemd-login >= 183])])
+        AC_DEFINE(WITH_SUSPEND_RESUME, 1, [Define if you have suspend-resume support])
         ;;
     *)
         AC_MSG_ERROR(--with-suspend-resume must be one of [none, upower, systemd])

src/main.c

@@ -30,6 +30,10 @@
 #include "mm-log.h"
 #include "mm-context.h"
 
+#if WITH_SUSPEND_RESUME
+# include "mm-sleep-monitor.h"
+#endif
+
 /* Maximum time to wait for all modems to get disabled and removed */
 #define MAX_SHUTDOWN_TIME_SECS 20
 
@@ -51,6 +55,24 @@ quit_cb (gpointer user_data)
     return FALSE;
 }
 
+#if WITH_SUSPEND_RESUME
+
+static void
+sleeping_cb (MMSleepMonitor *sleep_monitor)
+{
+    mm_dbg ("Removing devices... (sleeping)");
+    mm_base_manager_shutdown (manager, FALSE);
+}
+
+static void
+resuming_cb (MMSleepMonitor *sleep_monitor)
+{
+    mm_dbg ("Re-scanning (resuming)");
+    mm_base_manager_start (manager, FALSE);
+}
+
+#endif
+
 static void
 bus_acquired_cb (GDBusConnection *connection,
                  const gchar *name,
@@ -144,6 +166,15 @@ main (int argc, char *argv[])
                               name_lost_cb,
                               NULL,
                               NULL);
+#if WITH_SUSPEND_RESUME
+    {
+        MMSleepMonitor *sleep_monitor;
+
+        sleep_monitor = mm_sleep_monitor_get ();
+        g_signal_connect (sleep_monitor, MM_SLEEP_MONITOR_SLEEPING, G_CALLBACK (sleeping_cb), NULL);
+        g_signal_connect (sleep_monitor, MM_SLEEP_MONITOR_RESUMING, G_CALLBACK (resuming_cb), NULL);
+    }
+#endif
 
     /* Go into the main loop */
     loop = g_main_loop_new (NULL, FALSE);
@@ -157,7 +188,7 @@ main (int argc, char *argv[])
     if (manager) {
         GTimer *timer;
 
-        mm_base_manager_shutdown (manager);
+        mm_base_manager_shutdown (manager, TRUE);
 
         /* Wait for all modems to be disabled and removed, but don't wait
          * forever: if disabling the modems takes longer than 20s, just

src/mm-base-manager.c

@@ -538,6 +538,7 @@ remove_disable_ready (MMBaseModem *modem,
 
     device = find_device_by_modem (self, modem);
     if (device) {
+        g_cancellable_cancel (mm_base_modem_peek_cancellable (modem));
         mm_device_remove_modem (device);
         g_hash_table_remove (self->priv->devices, device);
     }
@@ -555,8 +556,23 @@ foreach_disable (gpointer key,
         mm_base_modem_disable (modem, (GAsyncReadyCallback)remove_disable_ready, self);
 }
 
+static gboolean
+foreach_remove (gpointer key,
+                MMDevice *device,
+                MMBaseManager *self)
+{
+    MMBaseModem *modem;
+
+    modem = mm_device_peek_modem (device);
+    if (modem)
+        g_cancellable_cancel (mm_base_modem_peek_cancellable (modem));
+    mm_device_remove_modem (device);
+    return TRUE;
+}
+
 void
-mm_base_manager_shutdown (MMBaseManager *self)
+mm_base_manager_shutdown (MMBaseManager *self,
+                          gboolean disable)
 {
     g_return_if_fail (self != NULL);
     g_return_if_fail (MM_IS_BASE_MANAGER (self));
@@ -564,12 +580,18 @@ mm_base_manager_shutdown (MMBaseManager *self)
     /* Cancel all ongoing auth requests */
     g_cancellable_cancel (self->priv->authp_cancellable);
 
+    if (disable) {
         g_hash_table_foreach (self->priv->devices, (GHFunc)foreach_disable, self);
 
         /* Disabling may take a few iterations of the mainloop, so the caller
          * has to iterate the mainloop until all devices have been disabled and
          * removed.
          */
+        return;
+    }
+
+    /* Otherwise, just remove directly */
+    g_hash_table_foreach_remove (self->priv->devices, (GHRFunc)foreach_remove, self);
 }
 
 guint32

src/mm-base-manager.h

@@ -57,7 +57,8 @@ MMBaseManager   *mm_base_manager_new         (GDBusConnection *bus,
 void             mm_base_manager_start       (MMBaseManager *manager,
                                               gboolean manual_scan);
 
-void             mm_base_manager_shutdown    (MMBaseManager *manager);
+void             mm_base_manager_shutdown    (MMBaseManager *manager,
+                                              gboolean disable);
 
 guint32          mm_base_manager_num_modems  (MMBaseManager *manager);