ocfs2: Release buffer_head in case of error in ocfs2_double_lock.
In ocfs2_double_lock, when ocfs2_inode_lock for inode1 fails, we just unlock inode2 and return without releasing buffer we get from inode_lock(inode2). The good thing is that it is freed by the only caller ocfs2_rename when it exits. But I don't think this is a right way for error handling. We should free the buffer_head we get in ocfs2_double_lock before exit so that the caller doesn't need to take care of it. Signed-off-by: NTao Ma <boyu.mt@taobao.com> Signed-off-by: NJoel Becker <joel.becker@oracle.com>
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