Re: [PATCH v5] mfd: intel-lpss: Clean up and modernize DebugFS usage

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

On Wed, Sep 16, 2026 at 03:13:35AM +0500, Maria Lisina wrote:

Thank you for the update, my comments below.

> The DebugFS API is designed to handle errors gracefully.
> Any explicit checking on return values is considered an anti-pattern.
> 
> This patch removes unnecessary error checking and converts
> intel_lpss_debugfs_add() into a void function.

Yep, these two paragraphs are good!

> While at it, this patch also clean ups legacy and deprecated usage
> of S_IRUGO macro and debugfs_remove_recursive() function.

No, this should be a separate patch.

...

> -static int intel_lpss_debugfs_add(struct intel_lpss *lpss)
> +static void intel_lpss_debugfs_add(struct intel_lpss *lpss)
>  {

> -	struct dentry *dir;
> -
> -	dir = debugfs_create_dir(dev_name(lpss->dev), intel_lpss_debugfs);

> +	lpss->debugfs =
> +		debugfs_create_dir(dev_name(lpss->dev), intel_lpss_debugfs);

> -	lpss->debugfs = dir;

This is unneeded churn. Yes, I understand that dir won't be used, but if you
really want to refactor do it in a separate change.

>  }

...

>  static void intel_lpss_debugfs_remove(struct intel_lpss *lpss)
>  {
> -	debugfs_remove_recursive(lpss->debugfs);
> +	debugfs_remove(lpss->debugfs);

Hmm... Why?

>  }

...

So, if you really want a refactoring, split this to up to three patches:
1) drop debugfs checks along with the warn message (as your initial goal);
2) replace macros by plain octal values for the permissions (optional);
3) assign debugfs directory directly (optional).

-- 
With Best Regards,
Andy Shevchenko