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Message-ID: <20240822100507.00000566@Huawei.com>
Date: Thu, 22 Aug 2024 10:05:07 +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>,
<linux-edac@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<opensource.kernel@...o.com>
Subject: Re: [PATCH v1] drivers:ras:Fix the NULL vs IS_ERR() bug for
debugfs_create_dir()
On Wed, 21 Aug 2024 03:17:18 -0400
Yang Ruibin <11162571@...o.com> wrote:
> The debugfs_create_dir() function returns error pointers.
> It never returns NULL. So use IS_ERR() to check it.
>
> Signed-off-by: Yang Ruibin <11162571@...o.com>
Ideally needs a fixes tag.
Otherwise (given I looked into a similar one last night
with the same pattern).
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.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;
> }
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