linux-kernel - Re: [PATCH 03/13] ext4: correct return value of ext4_convert_meta

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Date:   Thu, 17 Aug 2023 10:48:51 +0800
From:   Kemeng Shi <shikemeng@...weicloud.com>
To:     Theodore Ts'o <tytso@....edu>
Cc:     adilger.kernel@...ger.ca, linux-ext4@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/13] ext4: correct return value of ext4_convert_meta_bg



on 8/16/2023 11:00 AM, Theodore Ts'o wrote:
> On Thu, Jun 29, 2023 at 08:00:34PM +0800, Kemeng Shi wrote:
>> We return error in "ret", so collect previous error in "ret" instead
>> of "err" or previous error will be ignored.
>>
>> Signed-off-by: Kemeng Shi <shikemeng@...weicloud.com>
>> ---
>>  fs/ext4/resize.c | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
>> index 7cbc695b7005..0b3d8c808de1 100644
>> --- a/fs/ext4/resize.c
>> +++ b/fs/ext4/resize.c
>> @@ -1984,8 +1984,8 @@ static int ext4_convert_meta_bg(struct super_block *sb, struct inode *inode)
>>  
>>  errout:
>>  	ret = ext4_journal_stop(handle);
>> -	if (!err)
>> -		err = ret;
>> +	if (!ret)
>> +		ret = err;
>>  	return ret;
> 
> If there is a previous error in "err", I think we would want to
> prioritize returning that error, as opposed to the potential error
> from ext4_journal_stop().  So how about this instead?
> 
> errout:
> 	ret = ext4_journal_stop(handle);
> 	if (!err)
> 		ret = err;
> 	return ret;
> 
I think you mean:
errout:
	ret = ext4_journal_stop(handle);
	if (*err*)
		ret = err;
	return ret;
And I will fix in this way if I don't get wrong.
> 
> 						- Ted
>