oneshot:trigger exit early in no chan in oneshot

src/drivers/stm32/drv_io_timer.c

@@ -478,6 +478,8 @@ static inline void io_timer_set_PWM_mode(unsigned timer)
 void io_timer_trigger(void)
 {
 	int oneshots = io_timer_get_mode_channels(IOTimerChanMode_OneShot);
+
+	if (oneshots != 0) {
 		uint32_t action_cache[MAX_IO_TIMERS] = {0};
 		int actions = 0;
 
@@ -502,6 +504,7 @@ void io_timer_trigger(void)
 		}
 
 		px4_leave_critical_section(flags);
+	}
 }
 
 int io_timer_init_timer(unsigned timer)