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From:   Viresh Kumar <viresh.kumar@linaro.org>
To:     "Rafael J. Wysocki" <rafael@kernel.org>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Amit Kucheria <amitk@kernel.org>,
        Zhang Rui <rui.zhang@intel.com>
Cc:     Viresh Kumar <viresh.kumar@linaro.org>, linux-pm@vger.kernel.org,
        Vincent Guittot <vincent.guittot@linaro.org>,
        Caleb Connolly <caleb.connolly@linaro.org>,
        Yang Yingliang <yangyingliang@huawei.com>,
        linux-kernel@vger.kernel.org
Subject: [PATCH 2/3] thermal: core: Move cdev cleanup to thermal_release()
Date:   Wed, 18 Jan 2023 14:08:25 +0530
Message-Id: <d043f685320f4c5956293aff139b07034f24f0a5.1674030722.git.viresh.kumar@linaro.org>
In-Reply-To: <cover.1674030722.git.viresh.kumar@linaro.org>
References: <cover.1674030722.git.viresh.kumar@linaro.org>
MIME-Version: 1.0
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Precedence: bulk

thermal_release() already frees cdev, let it do rest of the cleanup as
well in order to simplify the error paths in
__thermal_cooling_device_register().

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/thermal/thermal_core.c | 33 ++++++++++++++-------------------
 1 file changed, 14 insertions(+), 19 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 77bd47d976a2..1fb109a97ff6 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -774,6 +774,9 @@ static void thermal_release(struct device *dev)
 	} else if (!strncmp(dev_name(dev), "cooling_device",
 			    sizeof("cooling_device") - 1)) {
 		cdev = to_cooling_device(dev);
+		thermal_cooling_device_destroy_sysfs(cdev);
+		kfree(cdev->type);
+		ida_free(&thermal_cdev_ida, cdev->id);
 		kfree(cdev);
 	}
 }
@@ -909,23 +912,21 @@ __thermal_cooling_device_register(struct device_node *np,
 	cdev->devdata = devdata;
 
 	ret = cdev->ops->get_max_state(cdev, &cdev->max_state);
-	if (ret) {
-		kfree(cdev->type);
-		goto out_ida_remove;
-	}
+	if (ret)
+		goto out_cdev_type;
 
 	thermal_cooling_device_setup_sysfs(cdev);
 
 	ret = dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
-	if (ret) {
-		kfree(cdev->type);
-		thermal_cooling_device_destroy_sysfs(cdev);
-		goto out_ida_remove;
-	}
+	if (ret)
+		goto out_cooling_dev;
 
 	ret = device_register(&cdev->device);
-	if (ret)
-		goto out_kfree_type;
+	if (ret) {
+		/* thermal_release() handles rest of the cleanup */
+		put_device(&cdev->device);
+		return ERR_PTR(ret);
+	}
 
 	/* Add 'this' new cdev to the global cdev list */
 	mutex_lock(&thermal_list_lock);
@@ -944,13 +945,10 @@ __thermal_cooling_device_register(struct device_node *np,
 
 	return cdev;
 
-out_kfree_type:
+out_cooling_dev:
 	thermal_cooling_device_destroy_sysfs(cdev);
+out_cdev_type:
 	kfree(cdev->type);
-	put_device(&cdev->device);
-
-	/* thermal_release() takes care of the rest */
-	cdev = NULL;
 out_ida_remove:
 	ida_free(&thermal_cdev_ida, id);
 out_kfree_cdev:
@@ -1111,10 +1109,7 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *cdev)
 
 	mutex_unlock(&thermal_list_lock);
 
-	ida_free(&thermal_cdev_ida, cdev->id);
 	device_del(&cdev->device);
-	thermal_cooling_device_destroy_sysfs(cdev);
-	kfree(cdev->type);
 	put_device(&cdev->device);
 }
 EXPORT_SYMBOL_GPL(thermal_cooling_device_unregister);
-- 
2.31.1.272.g89b43f80a514