Re: [PATCH v5] platform/x86: intel_pmc_core: export platform global reset bits via etr3 sysfs file

[kernel test robot]

Hi Tomas,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.12-rc6 next-20210409]
[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]

url:    https://github.com/0day-ci/linux/commits/Tomas-Winkler/platform-x86-intel_pmc_core-export-platform-global-reset-bits-via-etr3-sysfs-file/20210411-174433
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 52e44129fba5cfc4e351fdb5e45849afc74d9a53
config: x86_64-randconfig-a013-20210411 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/b966c4184fd486407516000bf3151906318d29f6
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Tomas-Winkler/platform-x86-intel_pmc_core-export-platform-global-reset-bits-via-etr3-sysfs-file/20210411-174433
        git checkout b966c4184fd486407516000bf3151906318d29f6
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/platform/x86/intel_pmc_core.c:656:41: warning: '&' within '|' [-Wbitwise-op-parentheses]
           return reg & ETR3_CF9LOCK ? attr->mode & SYSFS_PREALLOC | 0444 : attr->mode;
                                       ~~~~~~~~~~~^~~~~~~~~~~~~~~~ ~
   drivers/platform/x86/intel_pmc_core.c:656:41: note: place parentheses around the '&' expression to silence this warning
           return reg & ETR3_CF9LOCK ? attr->mode & SYSFS_PREALLOC | 0444 : attr->mode;
                                       ~~~~~~~~~~~^~~~~~~~~~~~~~~~
   1 warning generated.


vim +656 drivers/platform/x86/intel_pmc_core.c

   608	
   609	static int set_etr3(struct pmc_dev *pmcdev)
   610	{
   611		const struct pmc_reg_map *map = pmcdev->map;
   612		u32 reg;
   613		int err;
   614	
   615		if (!map->etr3_offset)
   616			return -EOPNOTSUPP;
   617	
   618		mutex_lock(&pmcdev->lock);
   619	
   620		/* check if CF9 is locked */
   621		reg = pmc_core_reg_read(pmcdev, map->etr3_offset);
   622		if (reg & ETR3_CF9LOCK) {
   623			err = -EACCES;
   624			goto out_unlock;
   625		}
   626	
   627		/* write CF9 global reset bit */
   628		reg |= ETR3_CF9GR;
   629		pmc_core_reg_write(pmcdev, map->etr3_offset, reg);
   630	
   631		reg = pmc_core_reg_read(pmcdev, map->etr3_offset);
   632		if (!(reg & ETR3_CF9GR)) {
   633			err = -EIO;
   634			goto out_unlock;
   635		}
   636	
   637		err = 0;
   638	
   639	out_unlock:
   640		mutex_unlock(&pmcdev->lock);
   641		return err;
   642	}
   643	static umode_t etr3_is_visible(struct kobject *kobj,
   644					struct attribute *attr,
   645					int idx)
   646	{
   647		struct device *dev = container_of(kobj, struct device, kobj);
   648		struct pmc_dev *pmcdev = dev_get_drvdata(dev);
   649		const struct pmc_reg_map *map = pmcdev->map;
   650		u32 reg;
   651	
   652		mutex_lock(&pmcdev->lock);
   653		reg = pmc_core_reg_read(pmcdev, map->etr3_offset);
   654		mutex_unlock(&pmcdev->lock);
   655	
 > 656		return reg & ETR3_CF9LOCK ? attr->mode & SYSFS_PREALLOC | 0444 : attr->mode;
   657	}
   658	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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