linux-kernel - Re: [PATCH v2] hwmon: (pmbus/acbel-fsg032) Add firmware version debugfs attribute

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Date:   Thu, 29 Jun 2023 08:50:25 +0800
From:   kernel test robot <lkp@...el.com>
To:     Eddie James <eajames@...ux.ibm.com>, linux-hwmon@...r.kernel.org
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux@...ck-us.net, jdelvare@...e.com, lakshmiy@...ibm.com,
        Eddie James <eajames@...ux.ibm.com>
Subject: Re: [PATCH v2] hwmon: (pmbus/acbel-fsg032) Add firmware version
 debugfs attribute

Hi Eddie,

kernel test robot noticed the following build warnings:

[auto build test WARNING on groeck-staging/hwmon-next]
[also build test WARNING on linus/master v6.4 next-20230628]
[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/Eddie-James/hwmon-pmbus-acbel-fsg032-Add-firmware-version-debugfs-attribute/20230628-233840
base:   https://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging.git hwmon-next
patch link:    https://lore.kernel.org/r/20230628153453.122213-1-eajames%40linux.ibm.com
patch subject: [PATCH v2] hwmon: (pmbus/acbel-fsg032) Add firmware version debugfs attribute
config: i386-randconfig-i012-20230628 (https://download.01.org/0day-ci/archive/20230629/202306290818.2IuC4QCQ-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230629/202306290818.2IuC4QCQ-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306290818.2IuC4QCQ-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/hwmon/pmbus/acbel-fsg032.c: In function 'acbel_fsg032_debugfs_read':
>> drivers/hwmon/pmbus/acbel-fsg032.c:25:13: warning: unused variable 'i' [-Wunused-variable]
      25 |         int i;
         |             ^


vim +/i +25 drivers/hwmon/pmbus/acbel-fsg032.c

    17	
    18	static ssize_t acbel_fsg032_debugfs_read(struct file *file, char __user *buf, size_t count,
    19						 loff_t *ppos)
    20	{
    21		struct i2c_client *client = file->private_data;
    22		char data[I2C_SMBUS_BLOCK_MAX + 2] = { 0 };
    23		char out[8];
    24		int rc;
  > 25		int i;
    26	
    27		rc = i2c_smbus_read_block_data(client, ACBEL_MFR_FW_REVISION, data);
    28		if (rc < 0)
    29			return rc;
    30	
    31		rc = snprintf(out, sizeof(out), "%*phN\n", min(rc, 3), data);
    32		return simple_read_from_buffer(buf, count, ppos, out, rc);
    33	}
    34	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki