shared: add NULL callback check in one more place

Follow-up for 9f65637308.

(cherry picked from commit d3d53e5cd143bf96d1eb0e254f16fa8d458d38ce)

Related: #1830861

1 files changed, 13 insertions, 18 deletions

diff --git a/src/shared/bus-wait-for-units.c b/src/shared/bus-wait-for-units.c
index 63ba3fd422..ba97922764 100644
--- a/src/shared/bus-wait-for-units.c
+++ b/src/shared/bus-wait-for-units.c
@@ -80,6 +80,15 @@ static WaitForItem *wait_for_item_free(WaitForItem *item) {
 
 DEFINE_TRIVIAL_CLEANUP_FUNC(WaitForItem*, wait_for_item_free);
 
+static void call_unit_callback_and_wait(BusWaitForUnits *d, WaitForItem *item, bool good) {
+        d->current = item;
+
+        if (item->unit_callback)
+                item->unit_callback(d, item->bus_path, good, item->userdata);
+
+        wait_for_item_free(item);
+}
+
 static void bus_wait_for_units_clear(BusWaitForUnits *d) {
         WaitForItem *item;
 
@@ -88,13 +97,8 @@ static void bus_wait_for_units_clear(BusWaitForUnits *d) {
         d->slot_disconnected = sd_bus_slot_unref(d->slot_disconnected);
         d->bus = sd_bus_unref(d->bus);
 
-        while ((item = hashmap_first(d->items))) {
-                d->current = item;
-
-                if (item->unit_callback)
-                        item->unit_callback(d, item->bus_path, false, item->userdata);
-                wait_for_item_free(item);
-        }
+        while ((item = hashmap_first(d->items)))
+                call_unit_callback_and_wait(d, item, false);
 
         d->items = hashmap_free(d->items);
 }
@@ -213,13 +217,7 @@ static void wait_for_item_check_ready(WaitForItem *item) {
                         return;
         }
 
-        if (item->unit_callback) {
-                d->current = item;
-                item->unit_callback(d, item->bus_path, true, item->userdata);
-        }
-
-        wait_for_item_free(item);
-
+        call_unit_callback_and_wait(d, item, true);
         bus_wait_for_units_check_ready(d);
 }
 
@@ -304,10 +302,7 @@ static int on_get_all_properties(sd_bus_message *m, void *userdata, sd_bus_error
                 log_debug_errno(sd_bus_error_get_errno(error), "GetAll() failed for %s: %s",
                                 item->bus_path, error->message);
 
-                d->current = item;
-                item->unit_callback(d, item->bus_path, false, item->userdata);
-                wait_for_item_free(item);
-
+                call_unit_callback_and_wait(d, item, false);
                 bus_wait_for_units_check_ready(d);
                 return 0;
         }