[PATCH v2 2/4] thermal: core: Introduce thermal_cooling_device_present()

Rafael J. Wysocki
2023-03-13T14:34:59Z

From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Introduce a helper function, thermal_cooling_device_present(), for
checking if the given cooling device is in the list of registered
cooling devices to avoid some code duplication in a subsequent
patch.

No expected functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

v1 -> v2: No changes

---
drivers/thermal/thermal_core.c | 21 +++++++++++++++------
1 file changed, 15 insertions(+), 6 deletions(-)

Index: linux-pm/drivers/thermal/thermal_core.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_core.c
+++ linux-pm/drivers/thermal/thermal_core.c
@@ -1045,6 +1045,18 @@ devm_thermal_of_cooling_device_register(
}
EXPORT_SYMBOL_GPL(devm_thermal_of_cooling_device_register);

+static bool thermal_cooling_device_present(struct thermal_cooling_device *cdev)
+{
+ struct thermal_cooling_device *pos = NULL;
+
+ list_for_each_entry(pos, &thermal_cdev_list, node) {
+ if (pos == cdev)
+ return true;
+ }
+
+ return false;
+}
+
static void __unbind(struct thermal_zone_device *tz, int mask,
struct thermal_cooling_device *cdev)
{
@@ -1067,20 +1079,17 @@ void thermal_cooling_device_unregister(s
int i;
const struct thermal_zone_params *tzp;
struct thermal_zone_device *tz;
- struct thermal_cooling_device *pos = NULL;

if (!cdev)
return;

mutex_lock(&thermal_list_lock);
- list_for_each_entry(pos, &thermal_cdev_list, node)
- if (pos == cdev)
- break;
- if (pos != cdev) {
- /* thermal cooling device not found */
+
+ if (!thermal_cooling_device_present(cdev)) {
mutex_unlock(&thermal_list_lock);
return;
}
+
list_del(&cdev->node);

/* Unbind all thermal zones associated with 'this' cdev */