ocfs2: should reclaim the inode if '__ocfs2_mknod_locked' returns an error

In ocfs2_mknod_locked if '__ocfs2_mknod_locked' returns an error, we should reclaim the inode successfully claimed above, otherwise, the inode never be reused. The case is described below:

ocfs2_mknod
ocfs2_mknod_locked
ocfs2_claim_new_inode
Successfully claim the inode
__ocfs2_mknod_locked
ocfs2_journal_access_di
Failed because of -ENOMEM or other reasons, the inode
lockres has not been initialized yet.

iput(inode)
ocfs2_evict_inode
ocfs2_delete_inode
ocfs2_inode_lock
ocfs2_inode_lock_full_nested
__ocfs2_cluster_lock
Return -EINVAL because of the inode lockres has not been initialized.

So the following operations are not performed ocfs2_wipe_inode
ocfs2_remove_inode
ocfs2_free_dinode
ocfs2_free_suballoc_bits

---
 fs/ocfs2/namei.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

index 1206392..3b48ac2 100644
@@ -655,9 +655,18 @@ static int ocfs2_mknod_locked(struct ocfs2_super *osb,
 		return status;
 	}
 
-	return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
+	status = __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
 				    parent_fe_bh, handle, inode_ac,
 				    fe_blkno, suballoc_loc, suballoc_bit);
+	if (status < 0) {
+		u64 bg_blkno = ocfs2_which_suballoc_group(fe_blkno, suballoc_bit);
+		int tmp = ocfs2_free_suballoc_bits(handle, inode_ac->ac_inode,
+				inode_ac->ac_bh, suballoc_bit, bg_blkno, 1);
+		if (tmp)
+			mlog_errno(tmp);
+	}
+
+	return status;
 }
 
 static int ocfs2_mkdir(struct inode *dir,

1.8.4.3