[PATCH v2] hwmon:(pmbus/ucd9000): Drop unnecessary error check for debugfs_create_dir

[PATCH v2] hwmon:(pmbus/ucd9000): Drop unnecessary error check for debugfs_create_dir

[Osama Muhammad]

This patch removes the error checking for debugfs_create_dir
in ucd9000.c. This is because the debugfs_create_dir() does not
return NULL but an ERR_PTR after an error.
The DebugFS kernel API is developed in a way that the
caller can safely ignore the errors that occur during
the creation of DebugFS nodes.The debugfs Api handles
it gracefully. The check is unnecessary.

Link to the comment above debugfs_create_dir:
https://elixir.bootlin.com/linux/latest/source/fs/debugfs/inode.c#L565

Signed-off-by: Osama Muhammad <osmtendev@gmail.com>

---
changes since v1
	-Added more descriptive commit message.
---
 drivers/hwmon/pmbus/ucd9000.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/hwmon/pmbus/ucd9000.c b/drivers/hwmon/pmbus/ucd9000.c
index 3daaf2237832..73559afa8ba7 100644
--- a/drivers/hwmon/pmbus/ucd9000.c
+++ b/drivers/hwmon/pmbus/ucd9000.c
@@ -512,8 +512,6 @@ static int ucd9000_init_debugfs(struct i2c_client *client,
 		return -ENOENT;
 
 	data->debugfs = debugfs_create_dir(client->name, debugfs);
-	if (!data->debugfs)
-		return -ENOENT;
 
 	/*
 	 * Of the chips this driver supports, only the UCD9090, UCD90160,
-- 
2.34.1

Re: [PATCH v2] hwmon:(pmbus/ucd9000): Drop unnecessary error check for debugfs_create_dir

[Guenter Roeck]

On Fri, May 26, 2023 at 08:49:06PM +0500, Osama Muhammad wrote:
> This patch removes the error checking for debugfs_create_dir
> in ucd9000.c. This is because the debugfs_create_dir() does not
> return NULL but an ERR_PTR after an error.
> The DebugFS kernel API is developed in a way that the
> caller can safely ignore the errors that occur during
> the creation of DebugFS nodes.The debugfs Api handles
> it gracefully. The check is unnecessary.
> 
> Link to the comment above debugfs_create_dir:
> https://elixir.bootlin.com/linux/latest/source/fs/debugfs/inode.c#L565
> 
> Signed-off-by: Osama Muhammad <osmtendev@gmail.com>

Applied.

Thanks,
Guenter

> ---
> changes since v1
> 	-Added more descriptive commit message.
> ---
>  drivers/hwmon/pmbus/ucd9000.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/drivers/hwmon/pmbus/ucd9000.c b/drivers/hwmon/pmbus/ucd9000.c
> index 3daaf2237832..73559afa8ba7 100644
> --- a/drivers/hwmon/pmbus/ucd9000.c
> +++ b/drivers/hwmon/pmbus/ucd9000.c
> @@ -512,8 +512,6 @@ static int ucd9000_init_debugfs(struct i2c_client *client,
>  		return -ENOENT;
>  
>  	data->debugfs = debugfs_create_dir(client->name, debugfs);
> -	if (!data->debugfs)
> -		return -ENOENT;
>  
>  	/*
>  	 * Of the chips this driver supports, only the UCD9090, UCD90160,