linux-kernel - Re: [PATCH v2] pinctrl: berlin: fix 'pctrl->functions' allocation in berlin_pinctrl_build

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Message-ID: <201808011354.CtuLL3aU%fengguang.wu@intel.com>
Date:   Wed, 1 Aug 2018 13:54:12 +0800
From:   kbuild test robot <lkp@...el.com>
To:     YueHaibing <yuehaibing@...wei.com>
Cc:     kbuild-all@...org, linus.walleij@...aro.org,
        yamada.masahiro@...ionext.com, keescook@...omium.org,
        Jisheng.Zhang@...aptics.com, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org, YueHaibing <yuehaibing@...wei.com>
Subject: Re: [PATCH v2] pinctrl: berlin: fix 'pctrl->functions' allocation in
 berlin_pinctrl_build_state

Hi YueHaibing,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on pinctrl/devel]
[also build test ERROR on v4.18-rc7 next-20180731]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/YueHaibing/pinctrl-berlin-fix-pctrl-functions-allocation-in-berlin_pinctrl_build_state/20180801-131813
base:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl.git devel
config: xtensa-allyesconfig (attached as .config)
compiler: xtensa-linux-gcc (GCC) 8.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=8.1.0 make.cross ARCH=xtensa 

All errors (new ones prefixed by >>):

   drivers/pinctrl/berlin/berlin.c: In function 'berlin_pinctrl_build_state':
>> drivers/pinctrl/berlin/berlin.c:259:5: error: too few arguments to function 'kfree'
        kfree( );
        ^~~~~
   In file included from drivers/pinctrl/berlin/berlin.c:20:
   include/linux/slab.h:183:6: note: declared here
    void kfree(const void *);
         ^~~~~

vim +/kfree +259 drivers/pinctrl/berlin/berlin.c

   202	
   203	static int berlin_pinctrl_build_state(struct platform_device *pdev)
   204	{
   205		struct berlin_pinctrl *pctrl = platform_get_drvdata(pdev);
   206		const struct berlin_desc_group *desc_group;
   207		const struct berlin_desc_function *desc_function;
   208		int i, max_functions = 0;
   209	
   210		pctrl->nfunctions = 0;
   211	
   212		for (i = 0; i < pctrl->desc->ngroups; i++) {
   213			desc_group = pctrl->desc->groups + i;
   214			/* compute the maxiumum number of functions a group can have */
   215			max_functions += 1 << (desc_group->bit_width + 1);
   216		}
   217	
   218		/* we will reallocate later */
   219		pctrl->functions = kcalloc(max_functions,
   220					   sizeof(*pctrl->functions), GFP_KERNEL);
   221		if (!pctrl->functions)
   222			return -ENOMEM;
   223	
   224		/* register all functions */
   225		for (i = 0; i < pctrl->desc->ngroups; i++) {
   226			desc_group = pctrl->desc->groups + i;
   227			desc_function = desc_group->functions;
   228	
   229			while (desc_function->name) {
   230				berlin_pinctrl_add_function(pctrl, desc_function->name);
   231				desc_function++;
   232			}
   233		}
   234	
   235		pctrl->functions = krealloc(pctrl->functions,
   236					    pctrl->nfunctions * sizeof(*pctrl->functions),
   237					    GFP_KERNEL);
   238	
   239		/* map functions to theirs groups */
   240		for (i = 0; i < pctrl->desc->ngroups; i++) {
   241			desc_group = pctrl->desc->groups + i;
   242			desc_function = desc_group->functions;
   243	
   244			while (desc_function->name) {
   245				struct berlin_pinctrl_function
   246					*function = pctrl->functions;
   247				const char **groups;
   248				bool found = false;
   249	
   250				while (function->name) {
   251					if (!strcmp(desc_function->name, function->name)) {
   252						found = true;
   253						break;
   254					}
   255					function++;
   256				}
   257	
   258				if (!found) {
 > 259					kfree( );
   260					return -EINVAL;
   261				}
   262	
   263				if (!function->groups) {
   264					function->groups =
   265						devm_kcalloc(&pdev->dev,
   266							     function->ngroups,
   267							     sizeof(char *),
   268							     GFP_KERNEL);
   269	
   270					if (!function->groups) {
   271						kfree(pctrl->functions);
   272						return -ENOMEM;
   273					}
   274				}
   275	
   276				groups = function->groups;
   277				while (*groups)
   278					groups++;
   279	
   280				*groups = desc_group->name;
   281	
   282				desc_function++;
   283			}
   284		}
   285	
   286		return 0;
   287	}
   288	

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