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Subject: Re: [PATCH v3 3/6] staging: r8188eu: add error handling of rtw_read8
To:     kernel test robot <lkp@intel.com>, Larry.Finger@lwfinger.net,
        phil@philpotter.co.uk, gregkh@linuxfoundation.org,
        straube.linux@gmail.com, fmdefrancesco@gmail.com
Cc:     clang-built-linux@googlegroups.com, kbuild-all@lists.01.org,
        linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org
References: <c59d5d850bf9aab208704182c83086609289cb9c.1629789580.git.paskripkin@gmail.com>
 <202108251911.Vwmzl4rI-lkp@intel.com>
From:   Pavel Skripkin <paskripkin@gmail.com>
Message-ID: <9743e1ee-75f4-6231-427b-8c7f659fb252@gmail.com>
Date:   Wed, 25 Aug 2021 15:17:06 +0300
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On 8/25/21 3:05 PM, kernel test robot wrote:
> Hi Pavel,
> 
> Thank you for the patch! Yet something to improve:
> 
> [auto build test ERROR on staging/staging-testing]
> 
> url:    https://github.com/0day-ci/linux/commits/Pavel-Skripkin/staging-r8188eu-remove-read-write-_macreg/20210824-162756
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git 093991aaadf0fbb34184fa37a46e7a157da3f386
> config: arm-buildonly-randconfig-r001-20210825 (attached as .config)
> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project ea08c4cd1c0869ec5024a8bb3f5cdf06ab03ae83)
> 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 arm cross compiling tool for clang build
>          # apt-get install 11.1.1
>          # https://github.com/0day-ci/linux/commit/d4e4bbed4e59df37967086f60fe92cb1b4504d37
>          git remote add linux-review https://github.com/0day-ci/linux
>          git fetch --no-tags linux-review Pavel-Skripkin/staging-r8188eu-remove-read-write-_macreg/20210824-162756
>          git checkout d4e4bbed4e59df37967086f60fe92cb1b4504d37
>          # save the attached .config to linux build tree
>          mkdir build_dir
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=arm SHELL=/bin/bash drivers/staging/r8188eu/
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
> 
> All errors (new ones prefixed by >>):
> 
>>> drivers/staging/r8188eu/hal/usb_halinit.c:2022:3: error: expected expression
>                     u8 tmp;
>                     ^
>     1 error generated.
> 
> Kconfig warnings: (for reference only)
>     WARNING: unmet direct dependencies detected for QCOM_SCM
>     Depends on (ARM || ARM64) && HAVE_ARM_SMCCC
>     Selected by
>     - ARM_QCOM_SPM_CPUIDLE && CPU_IDLE && (ARM || ARM64) && (ARCH_QCOM || COMPILE_TEST && !ARM64 && MMU
> 
> 

We need to fix Kconfig, ok, I will take a look at it later

> vim +2022 drivers/staging/r8188eu/hal/usb_halinit.c
> 

>    2020		case HW_VAR_BCN_VALID:
>    2021			/* BCN_VALID, BIT(16) of REG_TDECTRL = BIT(0) of REG_TDECTRL+2, write 1 to clear, Clear by sw */
>> 2022				u8 tmp;

Hm, I don't know anything about ARM compilers, so should I wrap this 
code block with {}?

My local gcc 11.1.1 (x86_64) does not produce any warnings/errors

>    2023	
>    2024			error = rtw_read8(Adapter, REG_TDECTRL + 2, &tmp);
>    2025			if (error)
>    2026				return;
>    2027	
>    2028			rtw_write8(Adapter, REG_TDECTRL + 2, tmp | BIT(0));
>    2029			break;
>    2030		default:
>    2031			break;
>    2032		}
>    2033	
> 


With regards,
Pavel Skripkin