ocfs2: unlock bh_state if bg check fails

We should unlock bh_stat if bg->bg_free_bits_count > bg->bg_bits

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Changwei Ge <[email protected]>
Suggested-by: Jan Kara <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Mark Fasheh <[email protected]>
Cc: Joel Becker <[email protected]>
Cc: Junxiao Bi <[email protected]>
Cc: Joseph Qi <[email protected]>
Cc: Changwei Ge <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

Author: Changwei Ge

fs/ocfs2/suballoc.c

@@ -2438,6 +2438,8 @@ static int ocfs2_block_group_clear_bits(handle_t *handle,
 	}
 	le16_add_cpu(&bg->bg_free_bits_count, num_bits);
 	if (le16_to_cpu(bg->bg_free_bits_count) > le16_to_cpu(bg->bg_bits)) {
+		if (undo_fn)
+			jbd_unlock_bh_state(group_bh);
 		return ocfs2_error(alloc_inode->i_sb, "Group descriptor # %llu has bit count %u but claims %u are freed. num_bits %d\n",
 				   (unsigned long long)le64_to_cpu(bg->bg_blkno),
 				   le16_to_cpu(bg->bg_bits),