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 76FBAC6FA8B for ; Wed, 21 Sep 2022 08:10:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229804AbiIUIKR (ORCPT ); Wed, 21 Sep 2022 04:10:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50996 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230204AbiIUIKN (ORCPT ); Wed, 21 Sep 2022 04:10:13 -0400 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0FD1324F1F for ; Wed, 21 Sep 2022 01:10:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1663747813; x=1695283813; h=date:from:to:cc:subject:message-id:mime-version; bh=FtupuEEq48sNG6dabCaExeYGA1olK93KQDsye1OyWyU=; b=jxPbN0xk8NQl0tnW5mV4qnTaVoC3STsoor6vGjNsyQJNoLTkMEI9Z7mb zvqsGrsQB/ZnuiHfCB1C0Pg9bx4Fc3wftcaKtdrW/UG5FUQQHcceCOCod BcNISSq6eZATDFKeFEJzjKAIkTNv5IruyIhHB6SH7u/LqmhGyVImui91X U20C9EdyFINMYLNwMDk8IC1iEJg6R2y5BQa/TCkt7fbuNYnhSAlzY+8lC C97EKXf7yXXzY3cQdC9QkKCK1ZF86EWCUUSM4Ur0N1PFjSfOx0suNgnwP 3BByWvRLV5GzJkdC8mAAWF42kKWQbEV5XdcE/nVHIS3aqaM3LCUOY36eF g==; X-IronPort-AV: E=McAfee;i="6500,9779,10476"; a="280309880" X-IronPort-AV: E=Sophos;i="5.93,332,1654585200"; d="scan'208";a="280309880" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Sep 2022 01:10:12 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,332,1654585200"; d="scan'208";a="570436331" Received: from lkp-server01.sh.intel.com (HELO c0a60f19fe7e) ([10.239.97.150]) by orsmga003.jf.intel.com with ESMTP; 21 Sep 2022 01:10:11 -0700 Received: from kbuild by c0a60f19fe7e with local (Exim 4.96) (envelope-from ) id 1oauo6-0003Ov-1k; Wed, 21 Sep 2022 08:10:10 +0000 Date: Wed, 21 Sep 2022 16:09:42 +0800 From: kernel test robot To: Stafford Horne Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: drivers/pci/pci.c:4195 pci_pio_to_address() warn: always true condition '(pio >= (0 - 0)) => (0-u32max >= 0)' Message-ID: <202209211647.5COmF7fM-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Stafford, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 60891ec99e141b74544d11e897a245ef06263052 commit: ded2ee36313c941f1a12b6f85cde295b575264ae openrisc: Add pci bus support date: 8 weeks ago config: openrisc-randconfig-m041-20220919 (https://download.01.org/0day-ci/archive/20220921/202209211647.5COmF7fM-lkp@intel.com/config) compiler: or1k-linux-gcc (GCC) 12.1.0 If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot smatch warnings: drivers/pci/pci.c:4195 pci_pio_to_address() warn: always true condition '(pio >= (0 - 0)) => (0-u32max >= 0)' drivers/media/pci/cx23885/cx23885-dvb.c:2579 dvb_register() error: we previously assumed 'fe1->dvb.frontend' could be null (see line 1743) vim +4195 drivers/pci/pci.c c5076cfe768998 Tomasz Nowicki 2016-05-11 4189 c5076cfe768998 Tomasz Nowicki 2016-05-11 4190 phys_addr_t pci_pio_to_address(unsigned long pio) c5076cfe768998 Tomasz Nowicki 2016-05-11 4191 { c5076cfe768998 Tomasz Nowicki 2016-05-11 4192 phys_addr_t address = (phys_addr_t)OF_BAD_ADDR; c5076cfe768998 Tomasz Nowicki 2016-05-11 4193 c5076cfe768998 Tomasz Nowicki 2016-05-11 4194 #ifdef PCI_IOBASE 5745392e0c2b78 Zhichang Yuan 2018-03-15 @4195 if (pio >= MMIO_UPPER_LIMIT) c5076cfe768998 Tomasz Nowicki 2016-05-11 4196 return address; c5076cfe768998 Tomasz Nowicki 2016-05-11 4197 5745392e0c2b78 Zhichang Yuan 2018-03-15 4198 address = logic_pio_to_hwaddr(pio); c5076cfe768998 Tomasz Nowicki 2016-05-11 4199 #endif c5076cfe768998 Tomasz Nowicki 2016-05-11 4200 c5076cfe768998 Tomasz Nowicki 2016-05-11 4201 return address; c5076cfe768998 Tomasz Nowicki 2016-05-11 4202 } 9cc742078c9a90 Jianjun Wang 2021-04-20 4203 EXPORT_SYMBOL_GPL(pci_pio_to_address); c5076cfe768998 Tomasz Nowicki 2016-05-11 4204 :::::: The code at line 4195 was first introduced by commit :::::: 5745392e0c2b78e0d73203281d5c42cbd6993194 PCI: Apply the new generic I/O management on PCI IO hosts :::::: TO: Zhichang Yuan :::::: CC: Bjorn Helgaas -- 0-DAY CI Kernel Test Service https://01.org/lkp