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 8ED4FC77B60 for ; Wed, 26 Apr 2023 06:08:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239541AbjDZGIc (ORCPT ); Wed, 26 Apr 2023 02:08:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239530AbjDZGIZ (ORCPT ); Wed, 26 Apr 2023 02:08:25 -0400 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A52B02D4A for ; Tue, 25 Apr 2023 23:07:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1682489273; x=1714025273; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=61rcuQojzawqY3VT1NZUTOHb6tPHTiO+dnB8VHoY9UQ=; b=DzlIAypwnqpxivF1CONrN/3sp6mbenGPIQ2CtsVG0CavtgmGl5doiICj trIvz+In/6XlJi/3t580KxufxACLRB2sNJz7sbMBgpo/mKnGqFbqDfMAs NB23fg31uiqXTeXaGN9DfrNKNxi5zpWVwE0IWZObEjQ/r7r4/eOQdVxmv caEOed7CBe/MMgPxETmP+a/WEWa1HDXaDRwMxUxc9kAME57UeWGw/4qfn 7Gp/oo2cbNtSp2bEGPuesGhDdGiVa8IUaX4b+FQUclPirqw66zvd1cHYN JIEPff9glZAA0B7vviP6Q+G/0aCD+SeyfkpBZt5O0alCXvPJtc7jS+r65 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10691"; a="348943223" X-IronPort-AV: E=Sophos;i="5.99,227,1677571200"; d="scan'208";a="348943223" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Apr 2023 23:07:39 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10691"; a="758467967" X-IronPort-AV: E=Sophos;i="5.99,227,1677571200"; d="scan'208";a="758467967" Received: from lkp-server01.sh.intel.com (HELO 98ee5a99fc83) ([10.239.97.150]) by fmsmga008.fm.intel.com with ESMTP; 25 Apr 2023 23:07:35 -0700 Received: from kbuild by 98ee5a99fc83 with local (Exim 4.96) (envelope-from ) id 1prYJS-0000C4-1P; Wed, 26 Apr 2023 06:07:34 +0000 Date: Wed, 26 Apr 2023 14:07:03 +0800 From: kernel test robot To: Thomas Zimmermann , maarten.lankhorst@linux.intel.com, mripard@kernel.org, airlied@gmail.com, daniel@ffwll.ch, javierm@redhat.com, deller@gmx.de, geert@linux-m68k.org, sudipm.mukherjee@gmail.com, teddy.wang@siliconmotion.com Cc: oe-kbuild-all@lists.linux.dev, linux-fbdev@vger.kernel.org, Thomas Zimmermann , dri-devel@lists.freedesktop.org Subject: Re: [PATCH 5/6] fbdev: Move CFB read and write code into helper functions Message-ID: <202304261333.9giYEbEl-lkp@intel.com> References: <20230425142846.730-6-tzimmermann@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20230425142846.730-6-tzimmermann@suse.de> Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Hi Thomas, kernel test robot noticed the following build warnings: [auto build test WARNING on drm-misc/drm-misc-next] [also build test WARNING on linus/master next-20230425] [cannot apply to v6.3] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Thomas-Zimmermann/fbdev-Return-number-of-bytes-read-or-written/20230425-223011 base: git://anongit.freedesktop.org/drm/drm-misc drm-misc-next patch link: https://lore.kernel.org/r/20230425142846.730-6-tzimmermann%40suse.de patch subject: [PATCH 5/6] fbdev: Move CFB read and write code into helper functions config: nios2-randconfig-s031-20230423 (https://download.01.org/0day-ci/archive/20230426/202304261333.9giYEbEl-lkp@intel.com/config) compiler: nios2-linux-gcc (GCC) 12.1.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-39-gce1a6720-dirty # https://github.com/intel-lab-lkp/linux/commit/d4a150f3dfa8e73f2e92f1c7efc9271e17632cc2 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Thomas-Zimmermann/fbdev-Return-number-of-bytes-read-or-written/20230425-223011 git checkout d4a150f3dfa8e73f2e92f1c7efc9271e17632cc2 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=nios2 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=nios2 SHELL=/bin/bash drivers/video/fbdev/core/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Link: https://lore.kernel.org/oe-kbuild-all/202304261333.9giYEbEl-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) >> drivers/video/fbdev/core/fb_cfb_fops.c:44:39: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const *s @@ got unsigned char [noderef] [usertype] __iomem *[assigned] src @@ drivers/video/fbdev/core/fb_cfb_fops.c:44:39: sparse: expected void const *s drivers/video/fbdev/core/fb_cfb_fops.c:44:39: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] src >> drivers/video/fbdev/core/fb_cfb_fops.c:113:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void *d @@ got unsigned char [noderef] [usertype] __iomem *[assigned] dst @@ drivers/video/fbdev/core/fb_cfb_fops.c:113:32: sparse: expected void *d drivers/video/fbdev/core/fb_cfb_fops.c:113:32: sparse: got unsigned char [noderef] [usertype] __iomem *[assigned] dst vim +44 drivers/video/fbdev/core/fb_cfb_fops.c 6 7 ssize_t fb_cfb_read(struct fb_info *info, char __user *buf, size_t count, loff_t *ppos) 8 { 9 unsigned long p = *ppos; 10 u8 *buffer, *dst; 11 u8 __iomem *src; 12 int c, cnt = 0, err = 0; 13 unsigned long total_size; 14 15 if (!info->screen_base) 16 return -ENODEV; 17 18 total_size = info->screen_size; 19 20 if (total_size == 0) 21 total_size = info->fix.smem_len; 22 23 if (p >= total_size) 24 return 0; 25 26 if (count >= total_size) 27 count = total_size; 28 29 if (count + p > total_size) 30 count = total_size - p; 31 32 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, GFP_KERNEL); 33 if (!buffer) 34 return -ENOMEM; 35 36 src = (u8 __iomem *)(info->screen_base + p); 37 38 if (info->fbops->fb_sync) 39 info->fbops->fb_sync(info); 40 41 while (count) { 42 c = (count > PAGE_SIZE) ? PAGE_SIZE : count; 43 dst = buffer; > 44 fb_memcpy_fromfb(dst, src, c); 45 dst += c; 46 src += c; 47 48 if (copy_to_user(buf, buffer, c)) { 49 err = -EFAULT; 50 break; 51 } 52 *ppos += c; 53 buf += c; 54 cnt += c; 55 count -= c; 56 } 57 58 kfree(buffer); 59 60 return cnt ? cnt : err; 61 } 62 EXPORT_SYMBOL(fb_cfb_read); 63 64 ssize_t fb_cfb_write(struct fb_info *info, const char __user *buf, size_t count, loff_t *ppos) 65 { 66 unsigned long p = *ppos; 67 u8 *buffer, *src; 68 u8 __iomem *dst; 69 int c, cnt = 0, err = 0; 70 unsigned long total_size; 71 72 if (!info->screen_base) 73 return -ENODEV; 74 75 total_size = info->screen_size; 76 77 if (total_size == 0) 78 total_size = info->fix.smem_len; 79 80 if (p > total_size) 81 return -EFBIG; 82 83 if (count > total_size) { 84 err = -EFBIG; 85 count = total_size; 86 } 87 88 if (count + p > total_size) { 89 if (!err) 90 err = -ENOSPC; 91 92 count = total_size - p; 93 } 94 95 buffer = kmalloc((count > PAGE_SIZE) ? PAGE_SIZE : count, GFP_KERNEL); 96 if (!buffer) 97 return -ENOMEM; 98 99 dst = (u8 __iomem *)(info->screen_base + p); 100 101 if (info->fbops->fb_sync) 102 info->fbops->fb_sync(info); 103 104 while (count) { 105 c = (count > PAGE_SIZE) ? PAGE_SIZE : count; 106 src = buffer; 107 108 if (copy_from_user(src, buf, c)) { 109 err = -EFAULT; 110 break; 111 } 112 > 113 fb_memcpy_tofb(dst, src, c); -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests