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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 03EC2C5CFC1 for ; Tue, 19 Jun 2018 10:08:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A457F2083D for ; Tue, 19 Jun 2018 10:08:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A457F2083D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756941AbeFSKIG (ORCPT ); Tue, 19 Jun 2018 06:08:06 -0400 Received: from hqemgate15.nvidia.com ([216.228.121.64]:5206 "EHLO hqemgate15.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755946AbeFSKIE (ORCPT ); Tue, 19 Jun 2018 06:08:04 -0400 Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1, AES128-SHA) id ; Tue, 19 Jun 2018 03:07:42 -0700 Received: from HQMAIL101.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Tue, 19 Jun 2018 03:08:08 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Tue, 19 Jun 2018 03:08:08 -0700 Received: from [10.21.132.148] (172.20.13.39) by HQMAIL101.nvidia.com (172.20.187.10) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 19 Jun 2018 10:08:01 +0000 Subject: Re: [PATCH v3] usb: xhci: remove the code build warning To: Dongjiu Geng , , , , , , References: <20180617023018.7952-1-gengdongjiu@huawei.com> From: Jon Hunter Message-ID: <44d08036-c147-ea05-90af-47e0836a0f0b@nvidia.com> Date: Tue, 19 Jun 2018 11:08:00 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.8.0 MIME-Version: 1.0 In-Reply-To: <20180617023018.7952-1-gengdongjiu@huawei.com> X-Originating-IP: [172.20.13.39] X-ClientProxiedBy: HQMAIL107.nvidia.com (172.20.187.13) To HQMAIL101.nvidia.com (172.20.187.10) Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 17/06/18 03:30, Dongjiu Geng wrote: > Initialize the 'err' variate to remove the build warning, > the warning is shown as below: > > drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_mbox_thread': > drivers/usb/host/xhci-tegra.c:552:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] > drivers/usb/host/xhci-tegra.c:482:6: note: 'err' was declared here > > Signed-off-by: Dongjiu Geng > Acked-by: Thierry Reding > --- > change since v1: > 1. Add 'Acked-by: Thierry Reding ' > > How to reproduce: > 1. make defconfig ARCH=arm > 2. make -j100 CROSS_COMPILE=arm-linux-gnueabi- ARCH=arm > > Then you can see below warnings: > drivers/usb/host/xhci-tegra.c: In function 'tegra_xusb_mbox_thread': > drivers/usb/host/xhci-tegra.c:552:6: warning: 'err' may be used uninitialized in this function [-Wuninitialized] > drivers/usb/host/xhci-tegra.c:482:6: note: 'err' was declared here > --- > drivers/usb/host/xhci-tegra.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c > index a8c1d07..d50549f 100644 > --- a/drivers/usb/host/xhci-tegra.c > +++ b/drivers/usb/host/xhci-tegra.c > @@ -481,7 +481,7 @@ static void tegra_xusb_mbox_handle(struct tegra_xusb *tegra, > unsigned long mask; > unsigned int port; > bool idle, enable; > - int err; > + int err = 0; > > memset(&rsp, 0, sizeof(rsp)); Acked-by: Jon Hunter Cheers! Jon -- nvpublic