Re: [PATCH v1 1/5] pinctrl: at91: use devm_kasprintf() to avoid potential leaks (part 2)

[kernel test robot <lkp@xxxxxxxxx>]

Hi Andy,

I love your patch! Yet something to improve:

[auto build test ERROR on linusw-pinctrl/devel]
[also build test ERROR on linusw-pinctrl/for-next next-20230210]
[cannot apply to clk/clk-next soc/for-next linus/master v6.2-rc7]
[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/Andy-Shevchenko/pinctrl-at91-use-devm_kasprintf-to-avoid-potential-leaks-part-2/20230210-225817
base:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git devel
patch link:    https://lore.kernel.org/r/20230210145656.71838-2-andriy.shevchenko%40linux.intel.com
patch subject: [PATCH v1 1/5] pinctrl: at91: use devm_kasprintf() to avoid potential leaks (part 2)
config: arm-randconfig-r046-20230210 (https://download.01.org/0day-ci/archive/20230211/202302110407.TpDeAlpQ-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-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/0562771ccfa099db4361c2e5958ca1685f498cdf
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Andy-Shevchenko/pinctrl-at91-use-devm_kasprintf-to-avoid-potential-leaks-part-2/20230210-225817
        git checkout 0562771ccfa099db4361c2e5958ca1685f498cdf
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202302110407.TpDeAlpQ-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   drivers/pinctrl/pinctrl-at91.c: In function 'at91_pinctrl_probe':
>> drivers/pinctrl/pinctrl-at91.c:1402:22: error: 'names' undeclared (first use in this function)
    1402 |                 if (!names)
         |                      ^~~~~
   drivers/pinctrl/pinctrl-at91.c:1402:22: note: each undeclared identifier is reported only once for each function it appears in
   drivers/pinctrl/pinctrl-at91.c: In function 'at91_gpio_probe':
   drivers/pinctrl/pinctrl-at91.c:1889:28: warning: passing argument 1 of 'strreplace' makes pointer from integer without a cast [-Wint-conversion]
    1889 |                 strreplace('-', alias_idx + 'A');
         |                            ^~~
         |                            |
         |                            int
   In file included from include/linux/bitmap.h:11,
                    from include/linux/cpumask.h:12,
                    from include/linux/smp.h:13,
                    from include/linux/lockdep.h:14,
                    from include/linux/mutex.h:17,
                    from include/linux/notifier.h:14,
                    from include/linux/clk.h:14,
                    from drivers/pinctrl/pinctrl-at91.c:8:
   include/linux/string.h:172:24: note: expected 'char *' but argument is of type 'int'
     172 | char *strreplace(char *s, char old, char new);
         |                  ~~~~~~^
>> drivers/pinctrl/pinctrl-at91.c:1889:17: error: too few arguments to function 'strreplace'
    1889 |                 strreplace('-', alias_idx + 'A');
         |                 ^~~~~~~~~~
   include/linux/string.h:172:7: note: declared here
     172 | char *strreplace(char *s, char old, char new);
         |       ^~~~~~~~~~


vim +/names +1402 drivers/pinctrl/pinctrl-at91.c

  1372	
  1373	static int at91_pinctrl_probe(struct platform_device *pdev)
  1374	{
  1375		struct device *dev = &pdev->dev;
  1376		struct at91_pinctrl *info;
  1377		struct pinctrl_pin_desc *pdesc;
  1378		int ret, i, j, k;
  1379	
  1380		info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
  1381		if (!info)
  1382			return -ENOMEM;
  1383	
  1384		ret = at91_pinctrl_probe_dt(pdev, info);
  1385		if (ret)
  1386			return ret;
  1387	
  1388		at91_pinctrl_desc.name = dev_name(&pdev->dev);
  1389		at91_pinctrl_desc.npins = gpio_banks * MAX_NB_GPIO_PER_BANK;
  1390		at91_pinctrl_desc.pins = pdesc =
  1391			devm_kcalloc(&pdev->dev,
  1392				     at91_pinctrl_desc.npins, sizeof(*pdesc),
  1393				     GFP_KERNEL);
  1394	
  1395		if (!at91_pinctrl_desc.pins)
  1396			return -ENOMEM;
  1397	
  1398		for (i = 0, k = 0; i < gpio_banks; i++) {
  1399			char **pin_names;
  1400	
  1401			pin_names = devm_kasprintf_strarray(dev, "pio", MAX_NB_GPIO_PER_BANK);
> 1402			if (!names)
  1403				return -ENOMEM;
  1404	
  1405			for (j = 0; j < MAX_NB_GPIO_PER_BANK; j++, k++) {
  1406				char *pin_name = pin_names[j];
  1407	
  1408				strreplace(pin_name, '-', i + 'A');
  1409	
  1410				pdesc->number = k;
  1411				pdesc->name = pin_name;
  1412				pdesc++;
  1413			}
  1414		}
  1415	
  1416		platform_set_drvdata(pdev, info);
  1417		info->pctl = devm_pinctrl_register(&pdev->dev, &at91_pinctrl_desc,
  1418						   info);
  1419	
  1420		if (IS_ERR(info->pctl)) {
  1421			dev_err(&pdev->dev, "could not register AT91 pinctrl driver\n");
  1422			return PTR_ERR(info->pctl);
  1423		}
  1424	
  1425		/* We will handle a range of GPIO pins */
  1426		for (i = 0; i < gpio_banks; i++)
  1427			if (gpio_chips[i])
  1428				pinctrl_add_gpio_range(info->pctl, &gpio_chips[i]->range);
  1429	
  1430		dev_info(&pdev->dev, "initialized AT91 pinctrl driver\n");
  1431	
  1432		return 0;
  1433	}
  1434	

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