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=-7.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 3B84BC43603 for ; Sun, 8 Dec 2019 16:56:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 16AD3205F4 for ; Sun, 8 Dec 2019 16:56:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726508AbfLHQ4X (ORCPT ); Sun, 8 Dec 2019 11:56:23 -0500 Received: from mga09.intel.com ([134.134.136.24]:14998 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726465AbfLHQ4X (ORCPT ); Sun, 8 Dec 2019 11:56:23 -0500 X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Dec 2019 08:56:22 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,292,1571727600"; d="scan'208";a="224546789" Received: from lkp-server01.sh.intel.com (HELO lkp-server01) ([10.239.97.150]) by orsmga002.jf.intel.com with ESMTP; 08 Dec 2019 08:56:21 -0800 Received: from kbuild by lkp-server01 with local (Exim 4.89) (envelope-from ) id 1idzr2-0009Ae-Ih; Mon, 09 Dec 2019 00:56:20 +0800 Date: Mon, 9 Dec 2019 00:55:22 +0800 From: kbuild test robot To: Rodrigo Rolim Mendes de Alencar <455.rodrigo.alencar@gmail.com> Cc: kbuild-all@lists.01.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, alencar.fmce@imbel.gov.br, Rodrigo Alencar <455.rodrigo.alencar@gmail.com> Subject: Re: [PATCH] video: fbdev: added driver for sharp memory lcd displays Message-ID: <201912090055.QXDo7ygw%lkp@intel.com> References: <1575554335-27197-1-git-send-email-alencar.fmce@imbel.gov.br> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1575554335-27197-1-git-send-email-alencar.fmce@imbel.gov.br> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Rodrigo, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linux/master] [also build test WARNING on robh/for-next linus/master v5.4 next-20191208] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Rodrigo-Rolim-Mendes-de-Alencar/video-fbdev-added-driver-for-sharp-memory-lcd-displays/20191207-112607 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 26bc672134241a080a83b2ab9aa8abede8d30e1c reproduce: # apt-get install sparse # sparse version: v0.6.1-91-g817270f-dirty make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot sparse warnings: (new ones prefixed by >>) >> drivers/video/fbdev/smemlcdfb.c:71:29: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected unsigned char [usertype] *vmem @@ got signed char [usertype] *vmem @@ >> drivers/video/fbdev/smemlcdfb.c:71:29: sparse: expected unsigned char [usertype] *vmem >> drivers/video/fbdev/smemlcdfb.c:71:29: sparse: got char [noderef] *screen_base vim +71 drivers/video/fbdev/smemlcdfb.c 67 68 static void smemlcd_update(struct smemlcd_par *par) 69 { 70 struct spi_device *spi = par->spi; > 71 u8 *vmem = par->info->screen_base; 72 u8 *buf_ptr = par->spi_buf; 73 int ret; 74 u32 i,j; 75 76 if (par->start + par->height > par->info->var.yres) { 77 par->start = 0; 78 par->height = 0; 79 } 80 /* go to start line */ 81 vmem += par->start * par->vmem_width; 82 /* update vcom */ 83 par->vcom ^= SMEMLCD_FRAME_INVERSION; 84 /* mode selection */ 85 *(buf_ptr++) = (par->height)? (SMEMLCD_DATA_UPDATE | par->vcom) : par->vcom; 86 87 /* not all SPI masters have LSB-first mode, bitrev8 is used */ 88 for (i = par->start + 1; i < par->start + par->height + 1; i++) { 89 /* gate line address */ 90 *(buf_ptr++) = bitrev8(i); 91 /* data writing */ 92 for (j = 0; j < par->spi_width; j++) 93 *(buf_ptr++) = bitrev8(*(vmem++)); 94 /* dummy data */ 95 *(buf_ptr++) = SMEMLCD_DUMMY_DATA; 96 /* video memory alignment */ 97 for (; j < par->vmem_width; j++) 98 vmem++; 99 } 100 /* dummy data */ 101 *(buf_ptr++) = SMEMLCD_DUMMY_DATA; 102 103 ret = spi_write(spi, &(par->spi_buf[0]), par->height * (par->spi_width + 2) + 2); 104 if (ret < 0) 105 dev_err(&spi->dev, "Couldn't send SPI command.\n"); 106 107 par->start = U32_MAX; 108 par->height = 0; 109 } 110 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation