linux-kernel - Re: [PATCH 01/13] USB: chipidea: fix memory leak with using debugfs

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Message-ID: <20230210085108.GA1991028@nchen-desktop>
Date:   Fri, 10 Feb 2023 16:51:08 +0800
From:   Peter Chen <peter.chen@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/13] USB: chipidea: fix memory leak with using
 debugfs_lookup()

On 23-02-02 16:32:23, Greg Kroah-Hartman wrote:
> When calling debugfs_lookup() the result must have dput() called on it,
> otherwise the memory will leak over time.  To make things simpler, just
> call debugfs_lookup_and_remove() instead which handles all of the logic
> at once.
> 
> Cc: Peter Chen <peter.chen@...nel.org>
> Cc: linux-usb@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

Acked-by: Peter Chen <peter.chen@...nel.org>
> ---
>  drivers/usb/chipidea/debug.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/chipidea/debug.c b/drivers/usb/chipidea/debug.c
> index faf6b078b6c4..bbc610e5bd69 100644
> --- a/drivers/usb/chipidea/debug.c
> +++ b/drivers/usb/chipidea/debug.c
> @@ -364,5 +364,5 @@ void dbg_create_files(struct ci_hdrc *ci)
>   */
>  void dbg_remove_files(struct ci_hdrc *ci)
>  {
> -	debugfs_remove(debugfs_lookup(dev_name(ci->dev), usb_debug_root));
> +	debugfs_lookup_and_remove(dev_name(ci->dev), usb_debug_root);
>  }
> -- 
> 2.39.1
> 

-- 

Thanks,
Peter Chen