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=-7.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED 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 A2C95C433E1 for ; Mon, 20 Jul 2020 19:32:50 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 76295207DF for ; Mon, 20 Jul 2020 19:32:50 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 76295207DF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arndb.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id B39C789DA6; Mon, 20 Jul 2020 19:32:49 +0000 (UTC) X-Greylist: delayed 303 seconds by postgrey-1.36 at gabe; Mon, 20 Jul 2020 19:32:47 UTC Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.126.135]) by gabe.freedesktop.org (Postfix) with ESMTPS id DC54389DA6 for ; Mon, 20 Jul 2020 19:32:47 +0000 (UTC) Received: from mail-qv1-f45.google.com ([209.85.219.45]) by mrelayeu.kundenserver.de (mreue012 [212.227.15.129]) with ESMTPSA (Nemesis) id 1MPaQU-1kBGii1aS2-00MgHU for ; Mon, 20 Jul 2020 21:27:42 +0200 Received: by mail-qv1-f45.google.com with SMTP id u8so8083030qvj.12 for ; Mon, 20 Jul 2020 12:27:42 -0700 (PDT) X-Gm-Message-State: AOAM533tMMtZDh3XPINXFNDjLHE0vIE0y+y1A2ffFn9PYGn2fx8/tNGr GxAp/RyPOs3og1lvpSjF87RCWvI+Eioyw/GldNM= X-Google-Smtp-Source: ABdhPJz4/GVi095uNagL1zwS7AisRzIt6vFPRcHiAqGZBWpvnfFu77t7jzve1fhi4YSFXXrmPSs1LFCvIBKpCGPSz7M= X-Received: by 2002:ad4:4c09:: with SMTP id bz9mr21965168qvb.210.1595273261190; Mon, 20 Jul 2020 12:27:41 -0700 (PDT) MIME-Version: 1.0 References: <20200720191845.20115-1-trix@redhat.com> In-Reply-To: <20200720191845.20115-1-trix@redhat.com> From: Arnd Bergmann Date: Mon, 20 Jul 2020 21:27:25 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH] video: fbdev: pvr2fb: initialize variables To: trix@redhat.com X-Provags-ID: V03:K1:OB/SsfxHaAFRHoD2pmkyGRCmLks+cNwnMVPWAdjt0o3rroIh+JM O67qm4cVTE19ssm9YFXZLOyCovQAQpIvtKMHZKvqlqjq2VUzztdTNlCnLEW8DI2XEKeLvZd yzQWbbvFFLf+2bRqugYB+PEzvlJxDJIv7ioeHjZamXzO/EToaOG27HJecVTH51mKJWxAo1J eGwrJUppCEIKqVvi4uamA== X-UI-Out-Filterresults: notjunk:1;V03:K0:S+RLFtfQobg=:KjnCGhxfRJtrstF3fYvPrC XkUx1a7E2rKRmFgYEQHymO9RgBp3lFRFXJ9wCl6N8BPe9GULDkztXViYlQVVlCSJ1hGKnTq/o 32CAhjeOck8xt7QYTzKBa9hsxYMr9lIYVM4YsaQI8Ay5YK8xoUBzpdYu2IwpmW47gscD1xBhG B0q3mIE1ikZn+P2XmKn5N98SJareEiBnKqx8LZopIiSxJ5lydnGdYzFuM346gXN9lHbb/+ZA9 D8clsS4Fy8I967Abpfy064vmJmssM9PtxG0C6Dd0WcDRlMW43CjZrO4+IhvPEEjB9t6bFf5sq Cspd87CnGzqNbxStRLvphMK7tVjmV7ZnLArSNqDWDuK2qvdKQKVEZafTqWS6xp6JvY0DaPMMU DQGIdd8iB7eiy4Kj9qR1RKX1BbgS9c63rxiqsVp+hIx+TEafF+rF/IHCt592RmW33N5slFX8n zdFysA8k1ssdEw+bBVFZq7bwKxflF7iAMFxOibHVyqzS+RRI+C6kHa3RCbpOSrJHtwSUiRnYK hEIafwtLGVRD9hCMK4bmmkWYIhU4+ul2ZIWRRf0AQHeJOWolwkoHw85cKOSH7HdWnrN3t7/vw +XPdJtJmcrcEBgz24FUo/nZMEfKUi7qdbZPp49BdNv6qj7ycZtfmkNtnHq+NPf1uHOAL8SkSV j4REf8Km4n+CsRJle31pxB8+uF58CFkPuD+2Nkz6pJIHOoMndhrgZJTzygxPK/nXhxpAIHWdo PCbOFoisossp9Ef8HqQdCgic0j5BlGSyKujdXO2CF1+JSj4Z+o2NEe8L5BH+KRjLW/pwlbeyC gO7ojElJac/4Wys10P9qXAh3CPiOw7zE4pbTGxlLhZkKKZm1UyNXasCjie40nouYpg4+GOr X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Linux Fbdev development list , "Gustavo A. R. Silva" , Jani Nikula , Daniel Vetter , Bartlomiej Zolnierkiewicz , "linux-kernel@vger.kernel.org" , dri-devel , John Hubbard , Sam Ravnborg Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Mon, Jul 20, 2020 at 9:19 PM wrote: > > From: Tom Rix > > clang static analysis reports this repesentative error > > pvr2fb.c:1049:2: warning: 1st function call argument > is an uninitialized value [core.CallAndMessage] > if (*cable_arg) > ^~~~~~~~~~~~~~~ > > Problem is that cable_arg depends on the input loop to > set the cable_arg[0]. If it does not, then some random > value from the stack is used. > > A similar problem exists for output_arg. > > So initialize cable_arg and output_arg. Adding a zero-initialization is almost never the correct way to deal with these warnings, so one has to be careful doing this. I checked this file, and your patch is absolutely correct here. ;-) > Signed-off-by: Tom Rix Acked-by: Arnd Bergmann _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel