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[PATCH] devfreq: fix double call put_device

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  [PATCH] devfreq: fix double call put_device Caizhiyong <caizhiyong@hisilicon.com> - 2016-05-14 08:30 +0200
    Re: [PATCH] devfreq: fix double call put_device Chanwoo Choi <cw00.choi@samsung.com> - 2016-05-18 13:10 +0200

#1401065 — [PATCH] devfreq: fix double call put_device

From: Cai Zhiyong <caizhiyong@huawei.com>
Date: Sat, 14 May 2016 14:13:30 +0800
Subject: [PATCH] devfreq: fix double call put_device

1295  */
1296 void device_unregister(struct device *dev)
1297 {
1298         pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
1299         device_del(dev);
1300         put_device(dev);
1301 }
1302 EXPORT_SYMBOL_GPL(device_unregister);
1303

device_unregister is called put_device, there is no need to call
put_device(&devfreq->dev) again.

Signed-off-by: Cai Zhiyong <caizhiyong@huawei.com>
---
 drivers/devfreq/devfreq.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 1d6c803..8de22c0 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -621,7 +621,6 @@ int devfreq_remove_device(struct devfreq *devfreq)
 		return -EINVAL;
 
 	device_unregister(&devfreq->dev);
-	put_device(&devfreq->dev);
 
 	return 0;
 }
-- 
1.7.9.5

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#1402893

Hi Cai,

On 2016년 05월 14일 15:28, Caizhiyong wrote:
> From: Cai Zhiyong <caizhiyong@huawei.com>
> Date: Sat, 14 May 2016 14:13:30 +0800
> Subject: [PATCH] devfreq: fix double call put_device

The patch description don't need to include the 'Date/Subject'.
You need to delete them.

> 
> 1295  */
> 1296 void device_unregister(struct device *dev)
> 1297 {
> 1298         pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
> 1299         device_del(dev);
> 1300         put_device(dev);
> 1301 }
> 1302 EXPORT_SYMBOL_GPL(device_unregister);
> 1303

Also, you don't need to include the source code of device_unregister()
because below description explains the why this patch is needed.

> 
> device_unregister is called put_device, there is no need to call
> put_device(&devfreq->dev) again.
> 
> Signed-off-by: Cai Zhiyong <caizhiyong@huawei.com>
> ---
>  drivers/devfreq/devfreq.c |    1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index 1d6c803..8de22c0 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -621,7 +621,6 @@ int devfreq_remove_device(struct devfreq *devfreq)
>  		return -EINVAL;
>  
>  	device_unregister(&devfreq->dev);
> -	put_device(&devfreq->dev);
>  
>  	return 0;
>  }
> 

If you modify the patch description, Looks good to me.

Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>

Thanks,
Chanwoo Choi

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