diff options
-rw-r--r-- | drivers/thermal/thermal_core.c | 14 | ||||
-rw-r--r-- | include/linux/thermal.h | 2 |
2 files changed, 15 insertions, 1 deletions
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c index d2d089173165..a3282bfb343d 100644 --- a/drivers/thermal/thermal_core.c +++ b/drivers/thermal/thermal_core.c @@ -1036,6 +1036,7 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, if (!result) { list_add_tail(&dev->tz_node, &tz->thermal_instances); list_add_tail(&dev->cdev_node, &cdev->thermal_instances); + atomic_set(&tz->need_update, 1); } mutex_unlock(&cdev->lock); mutex_unlock(&tz->lock); @@ -1142,6 +1143,7 @@ __thermal_cooling_device_register(struct device_node *np, const struct thermal_cooling_device_ops *ops) { struct thermal_cooling_device *cdev; + struct thermal_zone_device *pos = NULL; int result; if (type && strlen(type) >= THERMAL_NAME_LENGTH) @@ -1186,6 +1188,12 @@ __thermal_cooling_device_register(struct device_node *np, /* Update binding information for 'this' new cdev */ bind_cdev(cdev); + mutex_lock(&thermal_list_lock); + list_for_each_entry(pos, &thermal_tz_list, node) + if (atomic_cmpxchg(&pos->need_update, 1, 0)) + thermal_zone_device_update(pos); + mutex_unlock(&thermal_list_lock); + return cdev; } @@ -1516,6 +1524,8 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, tz->trips = trips; tz->passive_delay = passive_delay; tz->polling_delay = polling_delay; + /* A new thermal zone needs to be updated anyway. */ + atomic_set(&tz->need_update, 1); dev_set_name(&tz->device, "thermal_zone%d", tz->id); result = device_register(&tz->device); @@ -1597,7 +1607,9 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, thermal_zone_device_set_polling(tz, 0); thermal_zone_device_reset(tz); - thermal_zone_device_update(tz); + /* Update the new thermal zone and mark it as already updated. */ + if (atomic_cmpxchg(&tz->need_update, 1, 0)) + thermal_zone_device_update(tz); return tz; diff --git a/include/linux/thermal.h b/include/linux/thermal.h index fb96b15693d4..2e7d0f7a0ecc 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -162,6 +162,7 @@ struct thermal_attr { * @forced_passive: If > 0, temperature at which to switch on all ACPI * processor cooling devices. Currently only used by the * step-wise governor. + * @need_update: if equals 1, thermal_zone_device_update needs to be invoked. * @ops: operations this &thermal_zone_device supports * @tzp: thermal zone parameters * @governor: pointer to the governor for this thermal zone @@ -188,6 +189,7 @@ struct thermal_zone_device { int emul_temperature; int passive; unsigned int forced_passive; + atomic_t need_update; struct thermal_zone_device_ops *ops; const struct thermal_zone_params *tzp; struct thermal_governor *governor; |