diff mbox series

[2/3] thermal: core: Move cdev cleanup to thermal_release()

Message ID d043f685320f4c5956293aff139b07034f24f0a5.1674030722.git.viresh.kumar@linaro.org
State New
Headers
Series thermal: Fix/cleanup error paths in __thermal_cooling_device_register() |

Commit Message

Viresh Kumar Jan. 18, 2023, 8:38 a.m. UTC 
  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(-)

Comments

Yang Yingliang Jan. 19, 2023, 8:25 a.m. UTC | #1 
On 2023/1/18 16:38, Viresh Kumar wrote:
> 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>
> ---
Reviewed-by: Yang Yingliang <yangyingliang@huawei.com>
>   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);
diff mbox series

Patch

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);