diff options
Diffstat (limited to 'drivers/thermal/thermal_sys.c')
| -rw-r--r-- | drivers/thermal/thermal_sys.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 800e0c56cc83..5066de5cfc0c 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -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); |