Re: [PATCH 20/22] Input: regulator-haptic - use guard notation when acquiring mutex

[kernel test robot <lkp@intel.com>]

Hi Dmitry,

kernel test robot noticed the following build warnings:

[auto build test WARNING on dtor-input/next]
[also build test WARNING on dtor-input/for-linus hid/for-next linus/master v6.11-rc6 next-20240906]
[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/Dmitry-Torokhov/Input-ad714x-use-guard-notation-when-acquiring-mutex/20240905-085752
base:   https://git.kernel.org/pub/scm/linux/kernel/git/dtor/input.git next
patch link:    https://lore.kernel.org/r/20240904044922.1049488-1-dmitry.torokhov%40gmail.com
patch subject: [PATCH 20/22] Input: regulator-haptic - use guard notation when acquiring mutex
config: x86_64-buildonly-randconfig-001-20240907 (https://download.01.org/0day-ci/archive/20240907/202409071004.IhekZKbM-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240907/202409071004.IhekZKbM-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202409071004.IhekZKbM-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/input/misc/regulator-haptic.c: In function 'regulator_haptic_suspend':
>> drivers/input/misc/regulator-haptic.c:206:13: warning: unused variable 'error' [-Wunused-variable]
     206 |         int error;
         |             ^~~~~


vim +/error +206 drivers/input/misc/regulator-haptic.c

d64cb71bede87d Jaewon Kim       2014-12-17  201  
1a3e6c1ee47d00 Jonathan Cameron 2023-01-02  202  static int regulator_haptic_suspend(struct device *dev)
d64cb71bede87d Jaewon Kim       2014-12-17  203  {
d64cb71bede87d Jaewon Kim       2014-12-17  204  	struct platform_device *pdev = to_platform_device(dev);
d64cb71bede87d Jaewon Kim       2014-12-17  205  	struct regulator_haptic *haptic = platform_get_drvdata(pdev);
d64cb71bede87d Jaewon Kim       2014-12-17 @206  	int error;
d64cb71bede87d Jaewon Kim       2014-12-17  207  
aaa0758ff6b5c4 Dmitry Torokhov  2024-09-03  208  	scoped_guard(mutex_intr, &haptic->mutex) {
d64cb71bede87d Jaewon Kim       2014-12-17  209  		regulator_haptic_set_voltage(haptic, 0);
d64cb71bede87d Jaewon Kim       2014-12-17  210  		haptic->suspended = true;
d64cb71bede87d Jaewon Kim       2014-12-17  211  
d64cb71bede87d Jaewon Kim       2014-12-17  212  		return 0;
d64cb71bede87d Jaewon Kim       2014-12-17  213  	}
d64cb71bede87d Jaewon Kim       2014-12-17  214  
aaa0758ff6b5c4 Dmitry Torokhov  2024-09-03  215  	return -EINTR;
aaa0758ff6b5c4 Dmitry Torokhov  2024-09-03  216  }
aaa0758ff6b5c4 Dmitry Torokhov  2024-09-03  217  

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