Re: [PATCH net-next 2/2] net: hns3: PF add support setting parameters of congestion control algorithm by devlink param

[kernel test robot]

Hi Guangbin,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on net-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Guangbin-Huang/net-hns3-add-support-setting-parameters-of-congestion-control-algorithm-by-devlink-param/20220923-094236
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git bcff1a37bafc144d67192f2f5e1f4b9c49b37bd6
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20220923/202209231935.JRvKASjh-lkp@xxxxxxxxx/config)
compiler: s390-linux-gcc (GCC) 12.1.0
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
        # https://github.com/intel-lab-lkp/linux/commit/fc0ab8f22c924e963b0e0a2723cbb49acc1d3bb3
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Guangbin-Huang/net-hns3-add-support-setting-parameters-of-congestion-control-algorithm-by-devlink-param/20220923-094236
        git checkout fc0ab8f22c924e963b0e0a2723cbb49acc1d3bb3
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/net/ethernet/hisilicon/hns3/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

   drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c: In function 'hclge_devlink_get_algo_param_value':
>> drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c:418:35: warning: variable 'tmp' set but not used [-Wunused-but-set-variable]
     418 |         char *value, *value_tmp, *tmp;
         |                                   ^~~
   drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c: In function 'hclge_devlink_algo_param_set':
>> drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c:690:13: warning: variable 'cnt' set but not used [-Wunused-but-set-variable]
     690 |         int cnt = 0;
         |             ^~~
   drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c: In function 'hclge_devlink_is_algo_param_valid':
   drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c:727:35: warning: variable 'tmp' set but not used [-Wunused-but-set-variable]
     727 |         char *value, *value_tmp, *tmp;
         |                                   ^~~


vim +/tmp +418 drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c

   415	
   416	static int hclge_devlink_get_algo_param_value(const char *str, u64 *param_value)
   417	{
 > 418		char *value, *value_tmp, *tmp;
   419		int ret = 0;
   420		int i;
   421	
   422		value = kmalloc(sizeof(char) * __DEVLINK_PARAM_MAX_STRING_VALUE,
   423				GFP_KERNEL);
   424		if (!value)
   425			return -ENOMEM;
   426	
   427		strncpy(value, str, __DEVLINK_PARAM_MAX_STRING_VALUE);
   428		value_tmp = value;
   429	
   430		tmp = strsep(&value, "@");
   431	
   432		for (i = 0; i < strlen(value); i++) {
   433			if (!(value[i] >= '0' && value[i] <= '9')) {
   434				kfree(value_tmp);
   435				return -EINVAL;
   436			}
   437		}
   438	
   439		ret = kstrtou64(value, 0, param_value);
   440	
   441		kfree(value_tmp);
   442		return ret;
   443	}
   444	

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