erofs: save one level of indentation

As Christoph said [1], ".. and save one
level of indentation."

[1] https://lore.kernel.org/r/20190829102426.GE20598@infradead.org/Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Link: https://lore.kernel.org/r/20190904020912.63925-22-gaoxiang25@huawei.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/erofs/inode.c

@@ -193,7 +193,9 @@ static int erofs_fill_inode(struct inode *inode, int isdir)
 	data = page_address(page);
 
 	err = erofs_read_inode(inode, data + ofs);
-	if (!err) {
+	if (err)
+		goto out_unlock;
+
 	/* setup the new inode */
 	switch (inode->i_mode & S_IFMT) {
 	case S_IFREG:
@@ -227,7 +229,6 @@ static int erofs_fill_inode(struct inode *inode, int isdir)
 		goto out_unlock;
 	}
 	inode->i_mapping->a_ops = &erofs_raw_access_aops;
-	}
 
 out_unlock:
 	unlock_page(page);