linux-kernel - Re: [PATCH 1/1] btrfs: fix improper return value

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Message-ID: <20161203184521.GA8207@mew>
Date:   Sat, 3 Dec 2016 10:45:21 -0800
From:   Omar Sandoval <osandov@...ndov.com>
To:     Pan Bian <bianpan2016@....com>
Cc:     Chris Mason <clm@...com>, Josef Bacik <jbacik@...com>,
        David Sterba <dsterba@...e.com>, linux-btrfs@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] btrfs: fix improper return value

On Sat, Dec 03, 2016 at 06:55:16PM +0800, Pan Bian wrote:
> In function btrfs_uuid_tree_iterate(), errno is assigned to variable
> ret on errors. However, it directly returns 0. It may be better to
> return ret.
> 
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=188731
> 
> Signed-off-by: Pan Bian <bianpan2016@....com>
> ---
>  fs/btrfs/uuid-tree.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/btrfs/uuid-tree.c b/fs/btrfs/uuid-tree.c
> index 7fc89e4..44bcc1f 100644
> --- a/fs/btrfs/uuid-tree.c
> +++ b/fs/btrfs/uuid-tree.c
> @@ -353,5 +353,5 @@ int btrfs_uuid_tree_iterate(struct btrfs_fs_info *fs_info,
>  	btrfs_free_path(path);
>  	if (ret)
>  		btrfs_warn(fs_info, "btrfs_uuid_tree_iterate failed %d", ret);
> -	return 0;
> +	return ret;

This one makes sense, since the caller is checking the return value. The
caller is already printing a warning, can you also get rid of the
btrfs_warn(fs_info, "btrfs_uuid_tree_iterate failed %d", ret)?