Thermal: List thermal_instance in thermal_cooling_device.

List thermal_instance in thermal_cooling_device so that
cooling device can know the cooling state requirement
of all the thermal instances.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Eduardo Valentin <eduardo.valentin@ti.com>

2 files changed, 7 insertions, 1 deletions

diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 288437651da..70045c12d7d 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -57,6 +57,7 @@ struct thermal_instance {
         char attr_name[THERMAL_NAME_LENGTH];
         struct device_attribute attr;
         struct list_head tz_node; /* node in tz->thermal_instances */
+        struct list_head cdev_node; /* node in cdev->thermal_instances */
 };
 
 static DEFINE_IDR(thermal_tz_idr);
@@ -878,8 +879,10 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz,
                 result = -EEXIST;
                 break;
         }
-        if (!result)
+        if (!result) {
                 list_add_tail(&dev->tz_node, &tz->thermal_instances);
+                list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
+        }
         mutex_unlock(&tz->lock);
 
         if (!result)
@@ -915,6 +918,7 @@ int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz,
         list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {
                 if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
                         list_del(&pos->tz_node);
+                        list_del(&pos->cdev_node);
                         mutex_unlock(&tz->lock);
                         goto unbind;
                 }
@@ -984,6 +988,7 @@ thermal_cooling_device_register(char *type, void *devdata,
         }
 
         strcpy(cdev->type, type);
+        INIT_LIST_HEAD(&cdev->thermal_instances);
         cdev->ops = ops;
         cdev->device.class = &thermal_class;
         cdev->devdata = devdata;
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index cb0b0e3ffd9..9ae378a4a55 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -94,6 +94,7 @@ struct thermal_cooling_device {
         struct device device;
         void *devdata;
         const struct thermal_cooling_device_ops *ops;
+        struct list_head thermal_instances;
         struct list_head node;
 };