ACPI: thermal: Fix acpi_thermal_unregister_thermal_zone() cleanup

The acpi_thermal_unregister_thermal_zone() is paired with
acpi_thermal_register_thermal_zone() so it should mirror it.  It should
clean up all the resources that the register function allocated and
leave the stuff that was allocated elsewhere.

Unfortunately, it doesn't call thermal_zone_device_disable().  Also it
calls kfree(tz->trip_table) when it shouldn't.  That was allocated in
acpi_thermal_add().  Putting the kfree() here leads to a double free
in the acpi_thermal_add() clean up function.

Likewise, the acpi_thermal_remove() should mirror acpi_thermal_add() so
it should have an explicit kfree(tz->trip_table) as well.

Fixes: ec23c1c ("ACPI: thermal: Use trip point table to register thermal zones")
Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

Author: Dan Carpenter

drivers/acpi/thermal.c

@@ -736,9 +736,9 @@ static int acpi_thermal_register_thermal_zone(struct acpi_thermal *tz,
 
 static void acpi_thermal_unregister_thermal_zone(struct acpi_thermal *tz)
 {
+	thermal_zone_device_disable(tz->thermal_zone);
 	acpi_thermal_zone_sysfs_remove(tz);
 	thermal_zone_device_unregister(tz->thermal_zone);
-	kfree(tz->trip_table);
 	tz->thermal_zone = NULL;
 }
 
@@ -1001,7 +1001,7 @@ static void acpi_thermal_remove(struct acpi_device *device)
 
 	flush_workqueue(acpi_thermal_pm_queue);
 	acpi_thermal_unregister_thermal_zone(tz);
-
+	kfree(tz->trip_table);
 	acpi_thermal_free_thermal_zone(tz);
 }