linux-kernel - Re: [PATCH] UBI: fix return error code

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Date:	Fri, 20 Nov 2015 11:17:55 +0100
From:	Richard Weinberger <richard@....at>
To:	Sudip Mukherjee <sudipm.mukherjee@...il.com>,
	Artem Bityutskiy <dedekind1@...il.com>,
	David Woodhouse <dwmw2@...radead.org>,
	Brian Norris <computersforpeace@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-mtd@...ts.infradead.org
Subject: Re: [PATCH] UBI: fix return error code

Am 20.11.2015 um 11:14 schrieb Sudip Mukherjee:
> We are checking dfs_rootdir for error value or NULL. But in the
> conditional ternary operator we returned -ENODEV if dfs_rootdir contains
> an error value and returned PTR_ERR(dfs_rootdir) if dfs_rootdir is NULL.
> So in the case of dfs_rootdir being NULL we actually assigned 0 to err
> and returned it to the caller implying a success.
> Lets return -ENODEV when dfs_rootdir is NULL else return
> PTR_ERR(dfs_rootdir).
> 
> Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
> ---
>  drivers/mtd/ubi/debug.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mtd/ubi/debug.c b/drivers/mtd/ubi/debug.c
> index b077e43..c4cb15a 100644
> --- a/drivers/mtd/ubi/debug.c
> +++ b/drivers/mtd/ubi/debug.c
> @@ -236,7 +236,7 @@ int ubi_debugfs_init(void)
>  
>  	dfs_rootdir = debugfs_create_dir("ubi", NULL);
>  	if (IS_ERR_OR_NULL(dfs_rootdir)) {
> -		int err = dfs_rootdir ? -ENODEV : PTR_ERR(dfs_rootdir);
> +		int err = dfs_rootdir ? PTR_ERR(dfs_rootdir) : -ENODEV;
>  

Nice catch!

Thanks,
//richard
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