From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6E462FC6196 for ; Fri, 8 Nov 2019 22:28:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3E015214DA for ; Fri, 8 Nov 2019 22:28:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573252120; bh=LG611A+ex7oq1k+JPYb9ycFte2tnXj4oZlhBs5QXIfU=; h=In-Reply-To:References:From:To:Subject:Date:List-ID:From; b=jgJ234T4jWLs7e80EQSgJ7JjEs9+ulrAhnpO+mpqp0lNLq0G7GCLv+m0All7tDgh6 hIgpPbtA4LU9yDHBOA6slNxB3sIzCe6j0u8In97KJW7XN1WR8DKUwogiKndQmgdtoQ GiEImLjkD0ySRYsOA8asi1b2zhQ7sgCWYM/B5qVY= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729232AbfKHW2j (ORCPT ); Fri, 8 Nov 2019 17:28:39 -0500 Received: from mail.kernel.org ([198.145.29.99]:40394 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726095AbfKHW2j (ORCPT ); Fri, 8 Nov 2019 17:28:39 -0500 Received: from kernel.org (unknown [104.132.0.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 07D7120865; Fri, 8 Nov 2019 22:28:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573252119; bh=LG611A+ex7oq1k+JPYb9ycFte2tnXj4oZlhBs5QXIfU=; h=In-Reply-To:References:From:To:Subject:Date:From; b=LeUbuj9WYeec1GKOZruYBgcjdf5hOZY7IaATePNLJiFvxYo0oEhb75+mln9EznTlR Zs2JNHzg6PtNV62t85S9ah3NXMYzKe83NxrR5YPY8d7bUUw6HT6EFtw6RaY1hD2a1q fpdRdiJZbq8D2riuDCxqLuhhtHN437AJQjbSbbHw= Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable In-Reply-To: References: From: Stephen Boyd To: Chengyu Song , Michael Turquette , Yizhuo Zhai , Zhiyun Qian , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: Potential uninitialized variable "reg" in clk: axi-clkgen User-Agent: alot/0.8.1 Date: Fri, 08 Nov 2019 14:28:38 -0800 Message-Id: <20191108222839.07D7120865@mail.kernel.org> Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org Quoting Yizhuo Zhai (2019-10-09 17:55:06) > Hi All: > drivers/clk/clk-axi-clkgen.c: >=20 > Inside function axi_clkgen_recalc_rate(), variable "reg" could be > uninitialized if axi_clkgen_mmcm_read() fails. However, "reg" is used > to decide the control flow later in the if statement, which is > potentially unsafe. >=20 > The patch for this case is not easy since the error return is not an > acceptable return value for axi_clkgen_recalc_rate(). >=20 I think we will do nothing unless you send some sort of patch. Sorry.