config: only shutdown libhal if the connection is valid.

Thanks to libdbus' extensive use of assert we won't just get an error, it'll
bring the whole server down for us.
(cherry picked from commit fb07fab2c07e7b0834724541dc47bfba02ba8574)

1 files changed, 7 insertions, 5 deletions

diff --git a/config/hal.c b/config/hal.c
index 52a011333..1575422c3 100644
--- a/config/hal.c
+++ b/config/hal.c
@@ -283,12 +283,14 @@ disconnect_hook(void *data)
     struct config_hal_info *info = data;
 
     if (info->hal_ctx) {
-        dbus_error_init(&error);
-        if (!libhal_ctx_shutdown(info->hal_ctx, &error))
-            DebugF("[config/hal] couldn't shut down context: %s (%s)\n",
-                   error.name, error.message);
+        if (dbus_connection_get_is_connected(info->system_bus)) {
+            dbus_error_init(&error);
+            if (!libhal_ctx_shutdown(info->hal_ctx, &error))
+                DebugF("[config/hal] couldn't shut down context: %s (%s)\n",
+                        error.name, error.message);
+            dbus_error_free(&error);
+        }
         libhal_ctx_free(info->hal_ctx);
-        dbus_error_free(&error);
     }
 
     info->hal_ctx = NULL;