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 3C56FC433F5 for ; Fri, 31 Dec 2021 20:43:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231705AbhLaUmP (ORCPT ); Fri, 31 Dec 2021 15:42:15 -0500 Received: from mga05.intel.com ([192.55.52.43]:45521 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230182AbhLaUmO (ORCPT ); Fri, 31 Dec 2021 15:42:14 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1640983334; x=1672519334; h=date:from:to:cc:subject:message-id:mime-version; bh=8elW+lqaNwCgVQR16drVD3/HOGfS55e1vCJPLAvQSxo=; b=KFoAyh3OuXqvAri+6sl+CJdHeNISunvjuyJUyzcQrN7c5IKaoIq8R78W /w625oBkamVqGIIc8l3ZoeJZoVp1OmCEnCcnRyY55nVFp1oJdMdMtmmpw lY4TiQQGuoRZhTTiuf7z3bhiOyCJwyMVM2mkdYMtEINWzxyT6iGZcM9Nr ofL5XWGilIcHpKMfAYRYIrTtjr4LrxUaRCnDgd9wiSMfet5gKBWDi1lOI 02QeCZS+GSNdg5vm5I48l1eYUw9ljxeA4ufOK2WyUq1yk50xPRGLLiNew diut0Ehh9nBQpFUzDO6omWNSZ91eZnr0gmRDuhtaKaidKr9vfz3CuOwft A==; X-IronPort-AV: E=McAfee;i="6200,9189,10213"; a="328178827" X-IronPort-AV: E=Sophos;i="5.88,252,1635231600"; d="scan'208";a="328178827" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Dec 2021 12:42:14 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.88,252,1635231600"; d="scan'208";a="471022899" Received: from lkp-server01.sh.intel.com (HELO e357b3ef1427) ([10.239.97.150]) by orsmga006.jf.intel.com with ESMTP; 31 Dec 2021 12:42:12 -0800 Received: from kbuild by e357b3ef1427 with local (Exim 4.92) (envelope-from ) id 1n3Oj5-000BfB-PC; Fri, 31 Dec 2021 20:42:11 +0000 Date: Sat, 1 Jan 2022 04:42:05 +0800 From: kernel test robot To: Luc Van Oostenryck Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List Subject: drivers/net/usb/lan78xx.c:2963:27: sparse: sparse: incorrect type in assignment (different base types) Message-ID: <202201010449.pwZ9p571-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 4f3d93c6eaff6b84e43b63e0d7a119c5920e1020 commit: d991bb1c8da842a2a0b9dc83b1005e655783f861 include/linux/compiler-gcc.h: sparse can do constant folding of __builtin_bswap*() date: 8 months ago config: i386-randconfig-s002-20211123 (https://download.01.org/0day-ci/archive/20220101/202201010449.pwZ9p571-lkp@intel.com/config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d991bb1c8da842a2a0b9dc83b1005e655783f861 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout d991bb1c8da842a2a0b9dc83b1005e655783f861 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) drivers/net/usb/lan78xx.c:2963:29: sparse: sparse: cast to restricted __be16 >> drivers/net/usb/lan78xx.c:2963:27: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __wsum [usertype] csum @@ got unsigned short [usertype] @@ drivers/net/usb/lan78xx.c:2963:27: sparse: expected restricted __wsum [usertype] csum drivers/net/usb/lan78xx.c:2963:27: sparse: got unsigned short [usertype] vim +2963 drivers/net/usb/lan78xx.c 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2949 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2950 static void lan78xx_rx_csum_offload(struct lan78xx_net *dev, 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2951 struct sk_buff *skb, 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2952 u32 rx_cmd_a, u32 rx_cmd_b) 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2953 { 9343ac87f2a4e0 Dave Stevenson 2018-06-25 2954 /* HW Checksum offload appears to be flawed if used when not stripping 9343ac87f2a4e0 Dave Stevenson 2018-06-25 2955 * VLAN headers. Drop back to S/W checksums under these conditions. 9343ac87f2a4e0 Dave Stevenson 2018-06-25 2956 */ 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2957 if (!(dev->net->features & NETIF_F_RXCSUM) || 9343ac87f2a4e0 Dave Stevenson 2018-06-25 2958 unlikely(rx_cmd_a & RX_CMD_A_ICSM_) || 9343ac87f2a4e0 Dave Stevenson 2018-06-25 2959 ((rx_cmd_a & RX_CMD_A_FVTG_) && 9343ac87f2a4e0 Dave Stevenson 2018-06-25 2960 !(dev->net->features & NETIF_F_HW_VLAN_CTAG_RX))) { 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2961 skb->ip_summed = CHECKSUM_NONE; 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2962 } else { 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 @2963 skb->csum = ntohs((u16)(rx_cmd_b >> RX_CMD_B_CSUM_SHIFT_)); 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2964 skb->ip_summed = CHECKSUM_COMPLETE; 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2965 } 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2966 } 55d7de9de6c30a Woojung.Huh@microchip.com 2015-07-30 2967 :::::: The code at line 2963 was first introduced by commit :::::: 55d7de9de6c30adce8d675c7ce513e283829c2ff Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver :::::: TO: Woojung.Huh@microchip.com :::::: CC: David S. Miller --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org