Don't crash if we can't read the temperature for a zone while polling it.

ok dv@

diff --git a/sys/dev/ofw/ofw_thermal.c b/sys/dev/ofw/ofw_thermal.c
index 3e7ab68..b895281 100644 (file)
--- a/sys/dev/ofw/ofw_thermal.c
+++ b/sys/dev/ofw/ofw_thermal.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ofw_thermal.c,v 1.9 2024/06/27 09:37:07 kettenis Exp $        */
+/*     $OpenBSD: ofw_thermal.c,v 1.10 2024/07/01 14:13:43 kettenis Exp $       */
 /*
  * Copyright (c) 2019 Mark Kettenis
  *
@@ -306,12 +306,12 @@ thermal_zone_poll(void *arg)
        int32_t temp, delta;
        int i;
 
+       tp = tz->tz_trips;
        temp = thermal_get_temperature_cells(tz->tz_sensors);
        if (temp == THERMAL_SENSOR_MAX)
                goto out;
 
        newtp = NULL;
-       tp = tz->tz_trips;
        for (i = 0; i < tz->tz_ntrips; i++) {
                if (temp < tp->tp_temperature && tp != tz->tz_tp)
                        break;
@@ -372,7 +372,7 @@ out:
 
        if (polling_delay > 0)
                timeout_add_msec(&tz->tz_poll_to, polling_delay);
-       else
+       else if (tp)
                thermal_set_limit_cells(tz->tz_sensors, tp->tp_temperature);
 }