[PATCH -next] platform/x86: intel-ips: remove unnecessary checks in ips_debugfs_init

[PATCH -next] platform/x86: intel-ips: remove unnecessary checks in ips_debugfs_init

[YueHaibing]

As Greg KH explained in:
https://lkml.org/lkml/2015/8/15/114

There no need to check the return value of debugfs_create_file/
debugfs_create_dir.

This also fix static code checker warnings:

drivers/platform/x86/intel_ips.c:1314
 ips_debugfs_init() warn: passing zero to 'PTR_ERR'
drivers/platform/x86/intel_ips.c:1328
 ips_debugfs_init() warn: passing zero to 'PTR_ERR'

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 drivers/platform/x86/intel_ips.c | 21 +++------------------
 1 file changed, 3 insertions(+), 18 deletions(-)

diff --git a/drivers/platform/x86/intel_ips.c b/drivers/platform/x86/intel_ips.c
index 225638a..5c5dc82 100644
--- a/drivers/platform/x86/intel_ips.c
+++ b/drivers/platform/x86/intel_ips.c
@@ -1310,32 +1310,17 @@ static void ips_debugfs_init(struct ips_driver *ips)
 	int i;
 
 	ips->debug_root = debugfs_create_dir("ips", NULL);
-	if (!ips->debug_root) {
-		dev_err(ips->dev, "failed to create debugfs entries: %ld\n",
-			PTR_ERR(ips->debug_root));
-		return;
-	}
 
 	for (i = 0; i < ARRAY_SIZE(ips_debug_files); i++) {
-		struct dentry *ent;
 		struct ips_debugfs_node *node = &ips_debug_files[i];
 
 		node->ips = ips;
-		ent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
-					  ips->debug_root, node,
-					  &ips_debugfs_ops);
-		if (!ent) {
-			dev_err(ips->dev, "failed to create debug file: %ld\n",
-				PTR_ERR(ent));
-			goto err_cleanup;
-		}
+		debugfs_create_file(node->name, S_IFREG | S_IRUGO,
+				    ips->debug_root, node,
+				    &ips_debugfs_ops);
 	}
 
 	return;
-
-err_cleanup:
-	ips_debugfs_cleanup(ips);
-	return;
 }
 #endif /* CONFIG_DEBUG_FS */
 
-- 
2.7.0

Re: [PATCH -next] platform/x86: intel-ips: remove unnecessary checks in ips_debugfs_init

[Andy Shevchenko]

On Tue, Nov 27, 2018 at 11:09:38AM +0800, YueHaibing wrote:
> As Greg KH explained in:
> https://lkml.org/lkml/2015/8/15/114
> 
> There no need to check the return value of debugfs_create_file/
> debugfs_create_dir.
> 
> This also fix static code checker warnings:
> 
> drivers/platform/x86/intel_ips.c:1314
>  ips_debugfs_init() warn: passing zero to 'PTR_ERR'
> drivers/platform/x86/intel_ips.c:1328
>  ips_debugfs_init() warn: passing zero to 'PTR_ERR'
> 

Pushed to my review and testing queue, thanks!

> Signed-off-by: YueHaibing <yuehaibing@huawei.com>
> ---
>  drivers/platform/x86/intel_ips.c | 21 +++------------------
>  1 file changed, 3 insertions(+), 18 deletions(-)
> 
> diff --git a/drivers/platform/x86/intel_ips.c b/drivers/platform/x86/intel_ips.c
> index 225638a..5c5dc82 100644
> --- a/drivers/platform/x86/intel_ips.c
> +++ b/drivers/platform/x86/intel_ips.c
> @@ -1310,32 +1310,17 @@ static void ips_debugfs_init(struct ips_driver *ips)
>  	int i;
>  
>  	ips->debug_root = debugfs_create_dir("ips", NULL);
> -	if (!ips->debug_root) {
> -		dev_err(ips->dev, "failed to create debugfs entries: %ld\n",
> -			PTR_ERR(ips->debug_root));
> -		return;
> -	}
>  
>  	for (i = 0; i < ARRAY_SIZE(ips_debug_files); i++) {
> -		struct dentry *ent;
>  		struct ips_debugfs_node *node = &ips_debug_files[i];
>  
>  		node->ips = ips;
> -		ent = debugfs_create_file(node->name, S_IFREG | S_IRUGO,
> -					  ips->debug_root, node,
> -					  &ips_debugfs_ops);
> -		if (!ent) {
> -			dev_err(ips->dev, "failed to create debug file: %ld\n",
> -				PTR_ERR(ent));
> -			goto err_cleanup;
> -		}
> +		debugfs_create_file(node->name, S_IFREG | S_IRUGO,
> +				    ips->debug_root, node,
> +				    &ips_debugfs_ops);
>  	}
>  
>  	return;
> -
> -err_cleanup:
> -	ips_debugfs_cleanup(ips);
> -	return;
>  }
>  #endif /* CONFIG_DEBUG_FS */
>  
> -- 
> 2.7.0
> 
> 

-- 
With Best Regards,
Andy Shevchenko