linux-ext4 - Re: [PATCH 2/2] ext2: fix error handling in ext2_fill

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Date:	Thu, 15 May 2014 15:42:04 +0200
From:	Jan Kara <jack@...e.cz>
To:	Seunghun Lee <waydi1@...il.com>
Cc:	jack@...e.cz, lczerner@...hat.com, linux-ext4@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] ext2: fix error handling in ext2_fill_super()

On Thu 15-05-14 21:26:16, Seunghun Lee wrote:
> ext2_fill_super is using err variable, but it is not applied to return value.
> 
> This patch fixes it.
  I see no point why we should have 'err' and 'ret' variables. Just use
'ret' where 'err' is used and be done with it...

								Honza
> 
> Signed-off-by: Seunghun Lee <waydi1@...il.com>
> ---
>  fs/ext2/super.c |   10 ++++++----
>  1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/fs/ext2/super.c b/fs/ext2/super.c
> index e3fc51e..7e36536 100644
> --- a/fs/ext2/super.c
> +++ b/fs/ext2/super.c
> @@ -770,14 +770,13 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
>  	unsigned long logic_sb_block;
>  	unsigned long offset = 0;
>  	unsigned long def_mount_opts;
> -	int ret = -EINVAL;
> +	int ret = -ENOMEM;
>  	int blocksize = BLOCK_SIZE;
>  	int db_count;
>  	int i, j;
>  	__le32 features;
> -	int err;
> +	int err = 0;
>  
> -	err = -ENOMEM;
>  	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
>  	if (!sbi)
>  		goto failed;
> @@ -793,6 +792,9 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
>  
>  	spin_lock_init(&sbi->s_lock);
>  
> +	/* -EINVAL is default */
> +	ret = -EINVAL;
> +
>  	/*
>  	 * See what the current blocksize for the device is, and
>  	 * use that as the blocksize.  Otherwise (or if the blocksize
> @@ -1140,7 +1142,7 @@ failed_sbi:
>  	kfree(sbi->s_blockgroup_lock);
>  	kfree(sbi);
>  failed:
> -	return ret;
> +	return err ? err : ret;
>  }
>  
>  static void ext2_clear_super_error(struct super_block *sb)
> -- 
> 1.7.9.5
> 
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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