[v2] media: aspeed: Drop unnecessary error check for debugfs_create_file()

debugfs_create_file() return ERR_PTR and never return NULL.

When calling debugfs functions, there is no need to ever check the
return value. The function can work or not, but the code logic should
never do something different based on this.

Fixes: 52fed10ad756 ("media: aspeed: add debugfs")
Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
Suggested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
---
v2:
- Remove the err check instead of using IS_ERR to replace NULL check.
- Add suggested-by.
- Update the commit title and message.
---
 drivers/media/platform/aspeed/aspeed-video.c | 15 +++------------
 1 file changed, 3 insertions(+), 12 deletions(-)

On 10/7/23 03:43, Jinjie Ruan wrote:
> debugfs_create_file() return ERR_PTR and never return NULL.
>
> When calling debugfs functions, there is no need to ever check the
> return value. The function can work or not, but the code logic should
> never do something different based on this.


Thanks!

Reviewed-by: Eddie James <eajames@linux.ibm.com>


>
> Fixes: 52fed10ad756 ("media: aspeed: add debugfs")
> Signed-off-by: Jinjie Ruan <ruanjinjie@huawei.com>
> Suggested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
> ---
> v2:
> - Remove the err check instead of using IS_ERR to replace NULL check.
> - Add suggested-by.
> - Update the commit title and message.
> ---
>   drivers/media/platform/aspeed/aspeed-video.c | 15 +++------------
>   1 file changed, 3 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/media/platform/aspeed/aspeed-video.c b/drivers/media/platform/aspeed/aspeed-video.c
> index a9c2c69b2ed9..d08aa7f73d4f 100644
> --- a/drivers/media/platform/aspeed/aspeed-video.c
> +++ b/drivers/media/platform/aspeed/aspeed-video.c
> @@ -1970,22 +1970,15 @@ static void aspeed_video_debugfs_remove(struct aspeed_video *video)
>   	debugfs_entry = NULL;
>   }
>   
> -static int aspeed_video_debugfs_create(struct aspeed_video *video)
> +static void aspeed_video_debugfs_create(struct aspeed_video *video)
>   {
>   	debugfs_entry = debugfs_create_file(DEVICE_NAME, 0444, NULL,
>   					    video,
>   					    &aspeed_video_debugfs_fops);
> -	if (!debugfs_entry)
> -		aspeed_video_debugfs_remove(video);
> -
> -	return !debugfs_entry ? -EIO : 0;
>   }
>   #else
>   static void aspeed_video_debugfs_remove(struct aspeed_video *video) { }
> -static int aspeed_video_debugfs_create(struct aspeed_video *video)
> -{
> -	return 0;
> -}
> +static void aspeed_video_debugfs_create(struct aspeed_video *video) { }
>   #endif /* CONFIG_DEBUG_FS */
>   
>   static int aspeed_video_setup_video(struct aspeed_video *video)
> @@ -2198,9 +2191,7 @@ static int aspeed_video_probe(struct platform_device *pdev)
>   		return rc;
>   	}
>   
> -	rc = aspeed_video_debugfs_create(video);
> -	if (rc)
> -		dev_err(video->dev, "debugfs create failed\n");
> +	aspeed_video_debugfs_create(video);
>   
>   	return 0;
>   }