[Ocfs2-devel] [PATCH] ocfs2: do not put bh when buffer_uptodate failed

[alex chen <alex.chen@huawei.com>]

On 2014/3/26 2:45, Srinivas Eeda wrote:
> These changes looks good to me. However ocfs2_read_blocks and 
> ocfs2_read_blocks_sync needs the same fix ? :)

There is no need to do this in ocfs2_read_blocks and
ocfs2_read_blocks_sync, because bh will be set to NULL after put_bh,
and brelse will handle it.

> 
> On 03/25/2014 12:05 AM, alex chen wrote:
>> Do not put bh when buffer_uptodate failed in ocfs2_write_block and
>> ocfs2_write_super_or_backup, because it will put bh in b_end_io.
>> Otherwise it will hit a warning "VFS: brelse: Trying to free free
>> buffer".
>>
>> Signed-off-by: Alex Chen <alex.chen@huawei.com>
>> Reviewed-by: Joseph Qi <joseph.qi@huawei.com>
>> ---
>>   fs/ocfs2/buffer_head_io.c | 2 --
>>   1 file changed, 2 deletions(-)
>>
>> diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c
>> index 5b704c6..1edcb14 100644
>> --- a/fs/ocfs2/buffer_head_io.c
>> +++ b/fs/ocfs2/buffer_head_io.c
>> @@ -90,7 +90,6 @@ int ocfs2_write_block(struct ocfs2_super *osb, struct buffer_head *bh,
>>   		 * information for this bh as it's not marked locally
>>   		 * uptodate. */
>>   		ret = -EIO;
>> -		put_bh(bh);
>>   		mlog_errno(ret);
>>   	}
>>
>> @@ -420,7 +419,6 @@ int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
>>
>>   	if (!buffer_uptodate(bh)) {
>>   		ret = -EIO;
>> -		put_bh(bh);
>>   		mlog_errno(ret);
>>   	}
>>
> 
> 
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