linux-kernel - Re: [PATCH 4/5] btrfs: Use common error handling code in update_ref

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Date:   Mon, 21 Aug 2017 09:08:04 -0400
From:   Jeff Mahoney <jeffm@...e.com>
To:     SF Markus Elfring <elfring@...rs.sourceforge.net>,
        linux-btrfs@...r.kernel.org, Chris Mason <clm@...com>,
        David Sterba <dsterba@...e.com>, Josef Bacik <jbacik@...com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 4/5] btrfs: Use common error handling code in
 update_ref_path()

On 8/21/17 8:41 AM, SF Markus Elfring wrote:
> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Mon, 21 Aug 2017 13:34:29 +0200
> 
> Add a jump target so that a bit of exception handling can be better reused
> in this function.
> 
> This issue was detected by using the Coccinelle software.

Adding a jump label in the middle of a conditional for "common" error
handling makes the code more difficult to understand.

-Jeff

> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  fs/btrfs/send.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
> index 59fb1ed6ca20..a96edc91a101 100644
> --- a/fs/btrfs/send.c
> +++ b/fs/btrfs/send.c
> @@ -3697,12 +3697,12 @@ static int update_ref_path(struct send_ctx *sctx, struct recorded_ref *ref)
>  		return -ENOMEM;
>  
>  	ret = get_cur_path(sctx, ref->dir, ref->dir_gen, new_path);
> -	if (ret < 0) {
> -		fs_path_free(new_path);
> -		return ret;
> -	}
> +	if (ret < 0)
> +		goto free_path;
> +
>  	ret = fs_path_add(new_path, ref->name, ref->name_len);
>  	if (ret < 0) {
> +free_path:
>  		fs_path_free(new_path);
>  		return ret;
>  	}
> 


-- 
Jeff Mahoney
SUSE Labs



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