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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62DCDC43334 for ; Thu, 21 Jul 2022 16:00:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229680AbiGUQAq (ORCPT ); Thu, 21 Jul 2022 12:00:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229436AbiGUQAp (ORCPT ); Thu, 21 Jul 2022 12:00:45 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A550A868A2; Thu, 21 Jul 2022 09:00:44 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id y24so2222834plh.7; Thu, 21 Jul 2022 09:00:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=JuIHwz3RkYF7rkj+FsqTcQEnxEppDCpcRUBWvSutdgc=; b=ZByCULSTOU5yhfC/x3yOqAjox4WNGU92LFn/EIzCL3F5gzkLvI9M+Mpa9SbRExfuMF 8FRjFXbJBHba+anWMWud/ZOP4yb74aT48usajAOoFagcKz9TeXTWo5L/25UtaVqP0+1+ UzTyyLq9WyN2XQvc3udk8vBXPCk78oYs7GKzr+s7tcJWhhMC71t+ufPK2LAbvUHWYovV 5NwdETd+WiiWvYYrmcf5MH7dnt3F+hk/LQh9PwobHDkA+XxreJdMsXFoy4wgSWGvfhmd sMauRMgsoS9m4xipMyi2cKTlabLrN2eLD+hkJz0sVwPQffle7r24L0rtw/KbKscw8J+T GV9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=JuIHwz3RkYF7rkj+FsqTcQEnxEppDCpcRUBWvSutdgc=; b=Z62M1BR/c8bamchnKRVMkjgyEyPyFuP5WEmrtMig/q/lgea24Bhajm+67pxDhTTDtK DYc7VIdUq0dZMValj5QJri7YOON6ibXGQwQqN+9jEj3yJvWJnJOW+w/LeDZDAz4J8Zg5 aC5kpdWf5WXgICGKipuHfAmypFBtG5hd4e+8uDJg3/zPhlvLuJHaEJIJfWVfyNiMKUbn OiqcsKrMvENWPQqvKxxH94JxQhSBiNB9CxyY++eMMA2ZGqN7rN9yKDJT9lifugPD4GwN 6GBSDTJG4crpVhFZxmqIip13xJt5FhM0hXCQMYl3t0gpxD9TxKMo19xaPiDWjnPapWZY YpLA== X-Gm-Message-State: AJIora+KXCTiZNKOKVZxIUXbH4HVRmOUA89KJz8f259irwZ+y4KcIKx1 mQOzE0TGIUX+TSf+v4/IU9pRpQQBmpbyQg== X-Google-Smtp-Source: AGRyM1tmjCjVjuz7PbD1fsn9JySdUBw//MgQZlYicn28XRC9Cl9GZ1/HR2g63KLEyOsHb3ycXkMnaA== X-Received: by 2002:a17:90b:4c4e:b0:1f0:48e7:7258 with SMTP id np14-20020a17090b4c4e00b001f048e77258mr12250891pjb.223.1658419243611; Thu, 21 Jul 2022 09:00:43 -0700 (PDT) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id k11-20020a170902c40b00b0016c97d59f6asm1975310plk.93.2022.07.21.09.00.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 21 Jul 2022 09:00:43 -0700 (PDT) Sender: Vincent Mailhol From: Vincent Mailhol To: Nathan Chancellor , linux-can@vger.kernel.org Cc: davem@davemloft.net, kuba@kernel.org, netdev@vger.kernel.org, kernel@pengutronix.de, Marc Kleine-Budde , Frank Jungclaus , =?UTF-8?q?Stefan=20M=C3=A4tje?= , Vincent Mailhol Subject: [PATCH] can: pch_can: initialize errc before using it Date: Fri, 22 Jul 2022 01:00:32 +0900 Message-Id: <20220721160032.9348-1-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.35.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org After commit 3a5c7e4611dd, the variable errc is accessed before being initialized, c.f. below W=2 warning: | In function 'pch_can_error', | inlined from 'pch_can_poll' at drivers/net/can/pch_can.c:739:4: | drivers/net/can/pch_can.c:501:29: warning: 'errc' may be used uninitialized [-Wmaybe-uninitialized] | 501 | cf->data[6] = errc & PCH_TEC; | | ^ | drivers/net/can/pch_can.c: In function 'pch_can_poll': | drivers/net/can/pch_can.c:484:13: note: 'errc' was declared here | 484 | u32 errc, lec; | | ^~~~ Moving errc initialization up solves this issue. Fixes: 3a5c7e4611dd ("can: pch_can: do not report txerr and rxerr during bus-off") Reported-by: Nathan Chancellor Signed-off-by: Vincent Mailhol --- drivers/net/can/pch_can.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/can/pch_can.c b/drivers/net/can/pch_can.c index 50f6719b3aa4..32804fed116c 100644 --- a/drivers/net/can/pch_can.c +++ b/drivers/net/can/pch_can.c @@ -489,6 +489,7 @@ static void pch_can_error(struct net_device *ndev, u32 status) if (!skb) return; + errc = ioread32(&priv->regs->errc); if (status & PCH_BUS_OFF) { pch_can_set_tx_all(priv, 0); pch_can_set_rx_all(priv, 0); @@ -502,7 +503,6 @@ static void pch_can_error(struct net_device *ndev, u32 status) cf->data[7] = (errc & PCH_REC) >> 8; } - errc = ioread32(&priv->regs->errc); /* Warning interrupt. */ if (status & PCH_EWARN) { state = CAN_STATE_ERROR_WARNING; -- 2.35.1