Merge branch 'misc-2.6.33' into release
[linux-2.6.git] / drivers / thermal / thermal_sys.c
index 800e0c5..5066de5 100644 (file)
@@ -225,6 +225,12 @@ passive_store(struct device *dev, struct device_attribute *attr,
        if (!sscanf(buf, "%d\n", &state))
                return -EINVAL;
 
+       /* sanity check: values below 1000 millicelcius don't make sense
+        * and can cause the system to go into a thermal heart attack
+        */
+       if (state && state < 1000)
+               return -EINVAL;
+
        if (state && !tz->forced_passive) {
                mutex_lock(&thermal_list_lock);
                list_for_each_entry(cdev, &thermal_cdev_list, node) {
@@ -235,6 +241,8 @@ passive_store(struct device *dev, struct device_attribute *attr,
                                                                 cdev);
                }
                mutex_unlock(&thermal_list_lock);
+               if (!tz->passive_delay)
+                       tz->passive_delay = 1000;
        } else if (!state && tz->forced_passive) {
                mutex_lock(&thermal_list_lock);
                list_for_each_entry(cdev, &thermal_cdev_list, node) {
@@ -245,17 +253,12 @@ passive_store(struct device *dev, struct device_attribute *attr,
                                                                   cdev);
                }
                mutex_unlock(&thermal_list_lock);
+               tz->passive_delay = 0;
        }
 
        tz->tc1 = 1;
        tz->tc2 = 1;
 
-       if (!tz->passive_delay)
-               tz->passive_delay = 1000;
-
-       if (!tz->polling_delay)
-               tz->polling_delay = 10000;
-
        tz->forced_passive = state;
 
        thermal_zone_device_update(tz);
@@ -1016,6 +1019,8 @@ void thermal_zone_device_update(struct thermal_zone_device *tz)
                thermal_zone_device_set_polling(tz, tz->passive_delay);
        else if (tz->polling_delay)
                thermal_zone_device_set_polling(tz, tz->polling_delay);
+       else
+               thermal_zone_device_set_polling(tz, 0);
        mutex_unlock(&tz->lock);
 }
 EXPORT_SYMBOL(thermal_zone_device_update);