linux-kernel - Re: [PATCH v2] drivers:block:Use IS_ERR() to check debugfs_create

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Message-ID: <20240823092959.00000c90@Huawei.com>
Date: Fri, 23 Aug 2024 09:29:59 +0100
From: Jonathan Cameron <Jonathan.Cameron@...wei.com>
To: Yang Ruibin <11162571@...o.com>
CC: Tony Luck <tony.luck@...el.com>, Borislav Petkov <bp@...en8.de>, "Andy
 Whitcroft" <apw@...onical.com>, Joe Perches <joe@...ches.com>, "Dwaipayan
 Ray" <dwaipayanray1@...il.com>, Lukas Bulwahn <lukas.bulwahn@...il.com>, Ingo
 Molnar <mingo@...nel.org>, <linux-edac@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <opensource.kernel@...o.com>
Subject: Re: [PATCH v2] drivers:block:Use IS_ERR() to check
 debugfs_create_dir() return value

On Thu, 22 Aug 2024 21:23:58 +0800
Yang Ruibin <11162571@...o.com> wrote:

Patch title needs an update as this isn't in block and that's not the
style used for this subsystem.

Otherwise fine.

> The debugfs_create_dir() function returns error pointers.It
> never returns NULL. So use IS_ERR() to check its return value.
> 
> Fixes: 011d82611172 ("RAS: Add a Corrected Errors Collector")
> Signed-off-by: Yang Ruibin <11162571@...o.com>
> ---
>  drivers/ras/cec.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/ras/cec.c b/drivers/ras/cec.c
> index e440b15fbabc..ebd4631b685b 100644
> --- a/drivers/ras/cec.c
> +++ b/drivers/ras/cec.c
> @@ -489,7 +489,7 @@ static int __init create_debugfs_nodes(void)
>  	}
>  
>  	d = debugfs_create_dir("cec", dfs);
> -	if (!d) {
> +	if (IS_ERR(d)) {
>  		pr_warn("Error creating cec debugfs node!\n");
>  		return -1;
>  	}