[PATCH 4/4] thermal/core: Use the thermal class pointer as init guard

[Daniel Lezcano <daniel.lezcano@oss.qualcomm.com>]

The thermal class is now dynamically allocated and stored as a
pointer.

Use the thermal_class pointer itself to check whether the thermal
class has been created instead of keeping a separate
thermal_class_unavailable flag.

Signed-off-by: Daniel Lezcano <daniel.lezcano@oss.qualcomm.com>
---
 drivers/thermal/thermal_core.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 748ab76823a3..81f6bbaded65 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -950,7 +950,6 @@ static void thermal_unbind_cdev_from_trip(struct thermal_zone_device *tz,
 }
 
 static struct class *thermal_class;
-static bool thermal_class_unavailable __ro_after_init = true;
 
 static inline
 void print_bind_err_msg(struct thermal_zone_device *tz,
@@ -1053,7 +1052,7 @@ __thermal_cooling_device_register(struct device_node *np,
 	    !ops->set_cur_state)
 		return ERR_PTR(-EINVAL);
 
-	if (thermal_class_unavailable)
+	if (!thermal_class)
 		return ERR_PTR(-ENODEV);
 
 	cdev = kzalloc_obj(*cdev);
@@ -1536,7 +1535,7 @@ thermal_zone_device_register_with_trips(const char *type,
 	if (polling_delay && passive_delay > polling_delay)
 		return ERR_PTR(-EINVAL);
 
-	if (thermal_class_unavailable)
+	if (!thermal_class)
 		return ERR_PTR(-ENODEV);
 
 	tz = kzalloc_flex(*tz, trips, num_trips);
@@ -1834,7 +1833,7 @@ static void __thermal_pm_prepare(void)
 
 void thermal_pm_prepare(void)
 {
-	if (thermal_class_unavailable)
+	if (!thermal_class)
 		return;
 
 	__thermal_pm_prepare();
@@ -1865,7 +1864,7 @@ void thermal_pm_complete(void)
 {
 	struct thermal_zone_device *tz;
 
-	if (thermal_class_unavailable)
+	if (!thermal_class)
 		return;
 
 	guard(mutex)(&thermal_list_lock);
@@ -1902,8 +1901,6 @@ static int __init thermal_init(void)
 		goto unregister_governors;
 	}
 
-	thermal_class_unavailable = false;
-
 	return 0;
 
 unregister_governors:
-- 
2.43.0