[PATCH v1 1/2] Revert "thermal/core: Use the thermal class pointer as init guard"

["Rafael J. Wysocki" <rafael@kernel.org>]

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

This reverts commit 499274d078d0 ("thermal/core: Use the thermal class
pointer as init guard") because it depends on another commit that needs
to be reverted.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 drivers/thermal/thermal_core.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 28a20d4b475c..2d9d8740491f 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -890,6 +890,7 @@ static void thermal_unbind_cdev_from_trip(struct thermal_zone_device *tz,
 }
 
 static struct class *thermal_class __ro_after_init;
+static bool thermal_class_unavailable __ro_after_init = true;
 
 static inline
 void print_bind_err_msg(struct thermal_zone_device *tz,
@@ -973,7 +974,7 @@ thermal_cooling_device_alloc(const char *type, const struct thermal_cooling_devi
 	    !ops->set_cur_state)
 		return ERR_PTR(-EINVAL);
 
-	if (!thermal_class)
+	if (thermal_class_unavailable)
 		return ERR_PTR(-ENODEV);
 
 	cdev = kzalloc_obj(*cdev);
@@ -1447,7 +1448,7 @@ thermal_zone_device_register_with_trips(const char *type,
 	if (polling_delay && passive_delay > polling_delay)
 		return ERR_PTR(-EINVAL);
 
-	if (!thermal_class)
+	if (thermal_class_unavailable)
 		return ERR_PTR(-ENODEV);
 
 	tz = kzalloc_flex(*tz, trips, num_trips);
@@ -1745,7 +1746,7 @@ static void __thermal_pm_prepare(void)
 
 void thermal_pm_prepare(void)
 {
-	if (!thermal_class)
+	if (thermal_class_unavailable)
 		return;
 
 	__thermal_pm_prepare();
@@ -1776,7 +1777,7 @@ void thermal_pm_complete(void)
 {
 	struct thermal_zone_device *tz;
 
-	if (!thermal_class)
+	if (thermal_class_unavailable)
 		return;
 
 	guard(mutex)(&thermal_list_lock);
@@ -1815,6 +1816,8 @@ static int __init thermal_init(void)
 	}
 
 	thermal_class = tc;
+	thermal_class_unavailable = false;
+
 	return 0;
 
 unregister_governors:
-- 
2.51.0