f2fs: clean up f2fs_lookup

This patch cleans up to avoid deep indentation.
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/namei.c

@@ -232,13 +232,16 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 	struct inode *inode = NULL;
 	struct f2fs_dir_entry *de;
 	struct page *page;
+	nid_t ino;
 
 	if (dentry->d_name.len > F2FS_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
 	de = f2fs_find_entry(dir, &dentry->d_name, &page);
-	if (de) {
-		nid_t ino = le32_to_cpu(de->ino);
+	if (!de)
+		return d_splice_alias(inode, dentry);
+
+	ino = le32_to_cpu(de->ino);
 	f2fs_dentry_kunmap(dir, page);
 	f2fs_put_page(page, 0);
 
@@ -255,8 +258,6 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 			return ERR_PTR(err);
 		}
 	}
-	}
-
 	return d_splice_alias(inode, dentry);
 }