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[2620:137:e000::1:20]) by mx.google.com with ESMTP id b4-20020a630c04000000b00517ce377586si13106220pgl.270.2023.04.17.22.24.23; Mon, 17 Apr 2023 22:24:36 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@intel.com header.s=Intel header.b=jm6W5vWt; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230002AbjDRFT3 (ORCPT + 99 others); Tue, 18 Apr 2023 01:19:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55818 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229719AbjDRFT2 (ORCPT ); Tue, 18 Apr 2023 01:19:28 -0400 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D2F1835BE; Mon, 17 Apr 2023 22:19:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681795166; x=1713331166; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=ApemhVgsU+TFdPtwqGDQRyH9z/W8/lC9uWid1us00p8=; b=jm6W5vWtURdp2gOlWJQBRL340792QWIMJYTuoD5HkQyscjpgcmhPOw9u +2VZ7kLGAA6xH6NylNEMyG09MgzgV6r63JlStLmpV9V1PivjXcJRx2cgz NSAWD40b/QgZE4QSuZ4s/ZVDUYgnVkMk+Ey1WZrv3GyU8zXEcj3F5H/3D 7yxGsoQYGKdfww9iegSxtieIleAOMwca4AnWK1UncKND8VnzXXDuxQPVV /6UeIT5ZpKZ4wwocX9p2E7wwH8bHCnl25X4yZVm4yLpmoP3WIL1B/gj/Z 9Tfl0XUwDE5DoTe7Z204E6lngPzR4uHWbA61rY0e7mP/73QNB0tuZj5Kp w==; X-IronPort-AV: E=McAfee;i="6600,9927,10683"; a="325417315" X-IronPort-AV: E=Sophos;i="5.99,206,1677571200"; d="scan'208";a="325417315" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Apr 2023 22:19:26 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10683"; a="815071972" X-IronPort-AV: E=Sophos;i="5.99,206,1677571200"; d="scan'208";a="815071972" Received: from lkp-server01.sh.intel.com (HELO b613635ddfff) ([10.239.97.150]) by orsmga004.jf.intel.com with ESMTP; 17 Apr 2023 22:19:22 -0700 Received: from kbuild by b613635ddfff with local (Exim 4.96) (envelope-from ) id 1podkP-000d1P-1u; Tue, 18 Apr 2023 05:19:21 +0000 Date: Tue, 18 Apr 2023 13:18:22 +0800 From: kernel test robot To: Souradeep Chowdhury , Andy Gross , Konrad Dybcio , Krzysztof Kozlowski , Bjorn Andersson , Rob Herring , Alex Elder , Arnd Bergmann , Greg Kroah-Hartman Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, Sibi Sankar , Rajendra Nayak , Souradeep Chowdhury Subject: Re: [PATCH V1 2/3] drivers: misc: dcc: Add driver support for Data Capture and Compare unit(DCC) Message-ID: <202304181327.0grVYsHS-lkp@intel.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Souradeep, kernel test robot noticed the following build warnings: [auto build test WARNING on char-misc/char-misc-testing] [also build test WARNING on char-misc/char-misc-next char-misc/char-misc-linus linus/master v6.3-rc7 next-20230417] [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/Souradeep-Chowdhury/dt-bindings-misc-qcom-dcc-Add-the-dtschema/20230414-220304 patch link: https://lore.kernel.org/r/b1a9cbbcfefe133cc9047a71a2acdaa74239df29.1681480351.git.quic_schowdhu%40quicinc.com patch subject: [PATCH V1 2/3] drivers: misc: dcc: Add driver support for Data Capture and Compare unit(DCC) config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20230418/202304181327.0grVYsHS-lkp@intel.com/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 9638da200e00bd069e6dd63604e14cbafede9324) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/f3f73f6008e1ebca6fba848e260b1f938d91be95 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Souradeep-Chowdhury/dt-bindings-misc-qcom-dcc-Add-the-dtschema/20230414-220304 git checkout f3f73f6008e1ebca6fba848e260b1f938d91be95 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/misc/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot | Link: https://lore.kernel.org/oe-kbuild-all/202304181327.0grVYsHS-lkp@intel.com/ All warnings (new ones prefixed by >>): >> drivers/misc/dcc.c:217:14: warning: variable 'ret' is used uninitialized whenever 'for' loop exits because its condition is false [-Wsometimes-uninitialized] for (i = 0; i < drvdata->nr_link_list; i++) { ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/dcc.c:238:9: note: uninitialized use occurs here return ret; ^~~ drivers/misc/dcc.c:217:14: note: remove the condition if it is always true for (i = 0; i < drvdata->nr_link_list; i++) { ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/misc/dcc.c:190:9: note: initialize the variable 'ret' to silence this warning int ret; ^ = 0 1 warning generated. vim +217 drivers/misc/dcc.c 186 187 static int dcc_sw_trigger(struct dcc_drvdata *drvdata) 188 { 189 void __iomem *addr; 190 int ret; 191 int i; 192 u32 status; 193 u32 ll_cfg; 194 u32 tmp_ll_cfg; 195 u32 val; 196 197 mutex_lock(&drvdata->mutex); 198 199 for (i = 0; i < drvdata->nr_link_list; i++) { 200 if (!test_bit(i, drvdata->enable_bitmap)) 201 continue; 202 ll_cfg = dcc_list_readl(drvdata, i, DCC_LL_CFG); 203 tmp_ll_cfg = ll_cfg & ~DCC_TRIGGER_MASK; 204 dcc_list_writel(drvdata, tmp_ll_cfg, i, DCC_LL_CFG); 205 dcc_list_writel(drvdata, 1, i, DCC_LL_SW_TRIGGER); 206 dcc_list_writel(drvdata, ll_cfg, i, DCC_LL_CFG); 207 } 208 209 addr = drvdata->base + DCC_STATUS(drvdata->mem_map_ver); 210 if (readl_poll_timeout(addr, val, !FIELD_GET(DCC_STATUS_MASK, val), 211 1, STATUS_READY_TIMEOUT)) { 212 dev_err(drvdata->dev, "DCC is busy after receiving sw trigger\n"); 213 ret = -EBUSY; 214 goto out_unlock; 215 } 216 > 217 for (i = 0; i < drvdata->nr_link_list; i++) { 218 if (!test_bit(i, drvdata->enable_bitmap)) 219 continue; 220 221 status = dcc_list_readl(drvdata, i, DCC_LL_BUS_ACCESS_STATUS); 222 if (!status) 223 continue; 224 225 dev_err(drvdata->dev, "Read access error for list %d err: 0x%x\n", 226 i, status); 227 ll_cfg = dcc_list_readl(drvdata, i, DCC_LL_CFG); 228 tmp_ll_cfg = ll_cfg & ~DCC_TRIGGER_MASK; 229 dcc_list_writel(drvdata, tmp_ll_cfg, i, DCC_LL_CFG); 230 dcc_list_writel(drvdata, DCC_STATUS_MASK, i, DCC_LL_BUS_ACCESS_STATUS); 231 dcc_list_writel(drvdata, ll_cfg, i, DCC_LL_CFG); 232 ret = -ENODATA; 233 break; 234 } 235 236 out_unlock: 237 mutex_unlock(&drvdata->mutex); 238 return ret; 239 } 240 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests