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

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Date:   Sun, 11 Apr 2021 19:55:11 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tomas Winkler <tomas.winkler@...el.com>,
        Rajneesh Bhardwaj <irenic.rajneesh@...il.com>,
        David E Box <david.e.box@...el.com>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <mgross@...ux.intel.com>
Cc:     kbuild-all@...ts.01.org, platform-driver-x86@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Tamar Mashiah <tamar.mashiah@...el.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Tomas Winkler <tomas.winkler@...el.com>
Subject: Re: [PATCH v5] platform/x86: intel_pmc_core: export platform global
 reset bits via etr3 sysfs file

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-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # 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
        make W=1 ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

   drivers/platform/x86/intel_pmc_core.c: In function 'etr3_is_visible':
>> drivers/platform/x86/intel_pmc_core.c:656:41: warning: suggest parentheses around arithmetic in operand of '|' [-Wparentheses]
     656 |  return reg & ETR3_CF9LOCK ? attr->mode & SYSFS_PREALLOC | 0444 : attr->mode;


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@lists.01.org

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