dbus: properly serialize calendar timer data

[elogind.git] / src / core / timer.c

diff --git a/src/core/timer.c b/src/core/timer.c
index 31ef176e7e3d750c8867bc94d96d32063494262c..4453aa0781f5ef64bf14e9609959c7a091688d7a 100644 (file)
--- a/src/core/timer.c
+++ b/src/core/timer.c
@@ -323,7 +323,7 @@ static void timer_enter_waiting(Timer *t, bool initial) {
                 log_debug_unit(UNIT(t)->id,
                                "%s: Monotonic timer elapses in %s the next time.",
                                UNIT(t)->id,
-                               format_timespan(buf, sizeof(buf), t->next_elapse_monotonic - ts.monotonic));
+                               format_timespan(buf, sizeof(buf), t->next_elapse_monotonic > ts.monotonic ? t->next_elapse_monotonic - ts.monotonic : 0));
 
                 r = unit_watch_timer(UNIT(t), CLOCK_MONOTONIC, false, t->next_elapse_monotonic, &t->monotonic_watch);
                 if (r < 0)