linux-kernel - Re: [PATCH v1] bus:Fix error checking for debugfs_create_dir() in mvebu_mbus_debugfs

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Date:   Fri, 4 Aug 2023 16:08:31 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Wang Ming <machel@...o.com>
Cc:     Liu Shixin <liushixin2@...wei.com>, Rob Herring <robh@...nel.org>,
        linux-kernel@...r.kernel.org, opensource.kernel@...o.com
Subject: Re: [PATCH v1] bus:Fix error checking for debugfs_create_dir() in
 mvebu_mbus_debugfs_init()

On Wed, Jul 12, 2023 at 09:23:28PM +0800, Wang Ming wrote:
> debugfs_create_dir() does not return NULL,but it is
> possible to return error pointer. Most incorrect error checks
> were fixed,but the one in mvebu_mbus_debugfs_init() was forgotten.
> 
> Fix the remaining error check.
> 
> Signed-off-by: Wang Ming <machel@...o.com>
> ---
>  drivers/bus/mvebu-mbus.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/bus/mvebu-mbus.c b/drivers/bus/mvebu-mbus.c
> index 00cb792bda18..4c514894cc1f 100644
> --- a/drivers/bus/mvebu-mbus.c
> +++ b/drivers/bus/mvebu-mbus.c
> @@ -993,7 +993,7 @@ static __init int mvebu_mbus_debugfs_init(void)
>  		return 0;
>  
>  	s->debugfs_root = debugfs_create_dir("mvebu-mbus", NULL);
> -	if (s->debugfs_root) {
> +	if (!IS_ERR(s->debugfs_root)) {

No need for this check at all.

thanks,

greg k-h