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=-9.4 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT 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 F2CCEC2BC61 for ; Tue, 30 Oct 2018 13:30:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BA57120827 for ; Tue, 30 Oct 2018 13:30:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="YjWuT9Kr" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BA57120827 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org 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 S1729024AbeJ3WYR (ORCPT ); Tue, 30 Oct 2018 18:24:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:54192 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727826AbeJ3WYQ (ORCPT ); Tue, 30 Oct 2018 18:24:16 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 69B2E20827; Tue, 30 Oct 2018 13:30:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1540906248; bh=SOJxcm9dReDwSv9uaioWCpulJhLK2b/yU4PS86iNi8A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YjWuT9KrcfYlxDBLP+XG61qSTDVEq+kQi4K20m2mGfD3f2bPNRVRZVhpDwLxgiWcj Pvnnq5zq7sLFeHextfFRrzzUzaSsnM6s8IsZkGw8eA+Z1JQ5qgzFh85d/3lKX1hzhd yZIAH6qkBl45z0ERo/4STATJbEF7xLOB+LCRDMJ8= From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Nathan Chancellor , "David S . Miller" , Sasha Levin Subject: [PATCH AUTOSEL 4.9 09/13] net: qla3xxx: Remove overflowing shift statement Date: Tue, 30 Oct 2018 09:29:19 -0400 Message-Id: <20181030132923.218124-9-sashal@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20181030132923.218124-1-sashal@kernel.org> References: <20181030132923.218124-1-sashal@kernel.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nathan Chancellor [ Upstream commit 8c3bf9b62b667456a57aefcf1689e826df146159 ] Clang currently warns: drivers/net/ethernet/qlogic/qla3xxx.c:384:24: warning: signed shift result (0xF00000000) requires 37 bits to represent, but 'int' only has 32 bits [-Wshift-overflow] ((ISP_NVRAM_MASK << 16) | qdev->eeprom_cmd_data)); ~~~~~~~~~~~~~~ ^ ~~ 1 warning generated. The warning is certainly accurate since ISP_NVRAM_MASK is defined as (0x000F << 16) which is then shifted by 16, resulting in 64424509440, well above UINT_MAX. Given that this is the only location in this driver where ISP_NVRAM_MASK is shifted again, it seems likely that ISP_NVRAM_MASK was originally defined without a shift and during the move of the shift to the definition, this statement wasn't properly removed (since ISP_NVRAM_MASK is used in the statenent right above this). Only the maintainers can confirm this since this statment has been here since the driver was first added to the kernel. Link: https://github.com/ClangBuiltLinux/linux/issues/127 Signed-off-by: Nathan Chancellor Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/qlogic/qla3xxx.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qla3xxx.c b/drivers/net/ethernet/qlogic/qla3xxx.c index b09a6b80d107..355c5fb802cd 100644 --- a/drivers/net/ethernet/qlogic/qla3xxx.c +++ b/drivers/net/ethernet/qlogic/qla3xxx.c @@ -380,8 +380,6 @@ static void fm93c56a_select(struct ql3_adapter *qdev) qdev->eeprom_cmd_data = AUBURN_EEPROM_CS_1; ql_write_nvram_reg(qdev, spir, ISP_NVRAM_MASK | qdev->eeprom_cmd_data); - ql_write_nvram_reg(qdev, spir, - ((ISP_NVRAM_MASK << 16) | qdev->eeprom_cmd_data)); } /* -- 2.17.1