Re: [RFC PATCH] cleanup: make scoped_guard() to be return-friendly

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

Hi Przemek,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

[auto build test WARNING on 151ac45348afc5b56baa584c7cd4876addf461ff]

url:    https://github.com/intel-lab-lkp/linux/commits/Przemek-Kitszel/cleanup-make-scoped_guard-to-be-return-friendly/20240926-214521
base:   151ac45348afc5b56baa584c7cd4876addf461ff
patch link:    https://lore.kernel.org/r/20240926134347.19371-1-przemyslaw.kitszel%40intel.com
patch subject: [RFC PATCH] cleanup: make scoped_guard() to be return-friendly
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20240927/202409270848.tTpyEAR7-lkp@intel.com/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240927/202409270848.tTpyEAR7-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/202409270848.tTpyEAR7-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/iio/magnetometer/af8133j.c:316:3: warning: add explicit braces to avoid dangling else [-Wdangling-else]
     316 |                 scoped_guard(mutex, &data->mutex)
         |                 ^
   include/linux/cleanup.h:172:2: note: expanded from macro 'scoped_guard'
     172 |         __scoped_guard_labeled(__UNIQUE_ID(label), _name, args)
         |         ^
   include/linux/cleanup.h:177:2: note: expanded from macro '__scoped_guard_labeled'
     177 |         else                                            \
         |         ^
   1 warning generated.


vim +316 drivers/iio/magnetometer/af8133j.c

1d8f4b04621f0f Icenowy Zheng 2024-02-22  294  
1d8f4b04621f0f Icenowy Zheng 2024-02-22  295  static int af8133j_set_scale(struct af8133j_data *data,
1d8f4b04621f0f Icenowy Zheng 2024-02-22  296  			     unsigned int val, unsigned int val2)
1d8f4b04621f0f Icenowy Zheng 2024-02-22  297  {
1d8f4b04621f0f Icenowy Zheng 2024-02-22  298  	struct device *dev = &data->client->dev;
1d8f4b04621f0f Icenowy Zheng 2024-02-22  299  	u8 range;
1d8f4b04621f0f Icenowy Zheng 2024-02-22  300  	int ret = 0;
1d8f4b04621f0f Icenowy Zheng 2024-02-22  301  
1d8f4b04621f0f Icenowy Zheng 2024-02-22  302  	if (af8133j_scales[0][0] == val && af8133j_scales[0][1] == val2)
1d8f4b04621f0f Icenowy Zheng 2024-02-22  303  		range = AF8133J_REG_RANGE_12G;
1d8f4b04621f0f Icenowy Zheng 2024-02-22  304  	else if (af8133j_scales[1][0] == val && af8133j_scales[1][1] == val2)
1d8f4b04621f0f Icenowy Zheng 2024-02-22  305  		range = AF8133J_REG_RANGE_22G;
1d8f4b04621f0f Icenowy Zheng 2024-02-22  306  	else
1d8f4b04621f0f Icenowy Zheng 2024-02-22  307  		return -EINVAL;
1d8f4b04621f0f Icenowy Zheng 2024-02-22  308  
1d8f4b04621f0f Icenowy Zheng 2024-02-22  309  	pm_runtime_disable(dev);
1d8f4b04621f0f Icenowy Zheng 2024-02-22  310  
1d8f4b04621f0f Icenowy Zheng 2024-02-22  311  	/*
1d8f4b04621f0f Icenowy Zheng 2024-02-22  312  	 * When suspended, just store the new range to data->range to be
1d8f4b04621f0f Icenowy Zheng 2024-02-22  313  	 * applied later during power up.
1d8f4b04621f0f Icenowy Zheng 2024-02-22  314  	 */
1d8f4b04621f0f Icenowy Zheng 2024-02-22  315  	if (!pm_runtime_status_suspended(dev))
1d8f4b04621f0f Icenowy Zheng 2024-02-22 @316  		scoped_guard(mutex, &data->mutex)
1d8f4b04621f0f Icenowy Zheng 2024-02-22  317  			ret = regmap_write(data->regmap,
1d8f4b04621f0f Icenowy Zheng 2024-02-22  318  					   AF8133J_REG_RANGE, range);
1d8f4b04621f0f Icenowy Zheng 2024-02-22  319  
1d8f4b04621f0f Icenowy Zheng 2024-02-22  320  	pm_runtime_enable(dev);
1d8f4b04621f0f Icenowy Zheng 2024-02-22  321  
1d8f4b04621f0f Icenowy Zheng 2024-02-22  322  	data->range = range;
1d8f4b04621f0f Icenowy Zheng 2024-02-22  323  	return ret;
1d8f4b04621f0f Icenowy Zheng 2024-02-22  324  }
1d8f4b04621f0f Icenowy Zheng 2024-02-22  325  

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