Re: [PATCH v2] iio: temperature: tsys02d: Fix state desynchronization on resolution write error

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

Hi Salah,

kernel test robot noticed the following build errors:

[auto build test ERROR on jic23-iio/togreg]
[also build test ERROR on linus/master v7.3-rc3 next-20260916]
[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/Salah-Triki/iio-temperature-tsys02d-Fix-state-desynchronization-on-resolution-write-error/20260917-101608
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/20260917091609.626043-1-salah.triki%40gmail.com
patch subject: [PATCH v2] iio: temperature: tsys02d: Fix state desynchronization on resolution write error
config: riscv-randconfig-1000-20260918 (https://download.01.org/0day-ci/archive/20260918/202609182052.HpuVt6ba-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260918/202609182052.HpuVt6ba-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/202609182052.HpuVt6ba-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/iio/temperature/tsys02d.c:89:2: error: cannot jump from switch statement to this case label
      89 |         default:
         |         ^
   drivers/iio/temperature/tsys02d.c:82:3: note: jump bypasses initialization of variable with __attribute__((cleanup))
      82 |                 guard(mutex)(&dev_data->lock);
         |                 ^
   include/linux/cleanup.h:423:2: note: expanded from macro 'guard'
     423 |         CLASS(_name, __UNIQUE_ID(guard))
         |         ^
   include/linux/cleanup.h:303:3: note: expanded from macro 'CLASS'
     303 |                 class_##_name##_constructor
         |                 ^
   <scratch space>:93:1: note: expanded from here
      93 | class_mutex_constructor
         | ^
   note: (skipping 3 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
   include/linux/compiler_types.h:16:23: note: expanded from macro '__PASTE'
      16 | #define __PASTE(a, b) ___PASTE(a, b)
         |                       ^
   include/linux/compiler_types.h:15:24: note: expanded from macro '___PASTE'
      15 | #define ___PASTE(a, b) a##b
         |                        ^
   <scratch space>:99:1: note: expanded from here
      99 | __UNIQUE_ID_unlock_472
         | ^
   drivers/iio/temperature/tsys02d.c:82:3: note: jump bypasses initialization of variable with __attribute__((cleanup))
   include/linux/cleanup.h:423:15: note: expanded from macro 'guard'
     423 |         CLASS(_name, __UNIQUE_ID(guard))
         |                      ^
   include/linux/compiler.h:165:2: note: expanded from macro '__UNIQUE_ID'
     165 |         __PASTE(__UNIQUE_ID_,                                   \
         |         ^
   include/linux/compiler_types.h:16:23: note: expanded from macro '__PASTE'
      16 | #define __PASTE(a, b) ___PASTE(a, b)
         |                       ^
   include/linux/compiler_types.h:15:24: note: expanded from macro '___PASTE'
      15 | #define ___PASTE(a, b) a##b
         |                        ^
   <scratch space>:87:1: note: expanded from here
      87 | __UNIQUE_ID_guard_471
         | ^
   1 error generated.


vim +89 drivers/iio/temperature/tsys02d.c

53bf4d067d5115 Ludovic Tancerel 2015-10-01  65  
53bf4d067d5115 Ludovic Tancerel 2015-10-01  66  static int tsys02d_write_raw(struct iio_dev *indio_dev,
53bf4d067d5115 Ludovic Tancerel 2015-10-01  67  			     struct iio_chan_spec const *chan,
53bf4d067d5115 Ludovic Tancerel 2015-10-01  68  			     int val, int val2, long mask)
53bf4d067d5115 Ludovic Tancerel 2015-10-01  69  {
53bf4d067d5115 Ludovic Tancerel 2015-10-01  70  	struct ms_ht_dev *dev_data = iio_priv(indio_dev);
53bf4d067d5115 Ludovic Tancerel 2015-10-01  71  	int i, ret;
53bf4d067d5115 Ludovic Tancerel 2015-10-01  72  
53bf4d067d5115 Ludovic Tancerel 2015-10-01  73  	switch (mask) {
53bf4d067d5115 Ludovic Tancerel 2015-10-01  74  	case IIO_CHAN_INFO_SAMP_FREQ:
53bf4d067d5115 Ludovic Tancerel 2015-10-01  75  		i = ARRAY_SIZE(tsys02d_samp_freq);
53bf4d067d5115 Ludovic Tancerel 2015-10-01  76  		while (i-- > 0)
53bf4d067d5115 Ludovic Tancerel 2015-10-01  77  			if (val == tsys02d_samp_freq[i])
53bf4d067d5115 Ludovic Tancerel 2015-10-01  78  				break;
53bf4d067d5115 Ludovic Tancerel 2015-10-01  79  		if (i < 0)
53bf4d067d5115 Ludovic Tancerel 2015-10-01  80  			return -EINVAL;
53bf4d067d5115 Ludovic Tancerel 2015-10-01  81  
3c8dd88f5e71a2 Salah Triki      2026-09-17  82  		guard(mutex)(&dev_data->lock);
3c8dd88f5e71a2 Salah Triki      2026-09-17  83  
3c8dd88f5e71a2 Salah Triki      2026-09-17  84  		ret = ms_sensors_write_resolution(dev_data, i);
3c8dd88f5e71a2 Salah Triki      2026-09-17  85  		if (ret)
53bf4d067d5115 Ludovic Tancerel 2015-10-01  86  			return ret;
3c8dd88f5e71a2 Salah Triki      2026-09-17  87  
3c8dd88f5e71a2 Salah Triki      2026-09-17  88  		dev_data->res_index = i;
53bf4d067d5115 Ludovic Tancerel 2015-10-01 @89  	default:
53bf4d067d5115 Ludovic Tancerel 2015-10-01  90  		return -EINVAL;
53bf4d067d5115 Ludovic Tancerel 2015-10-01  91  	}
53bf4d067d5115 Ludovic Tancerel 2015-10-01  92  }
53bf4d067d5115 Ludovic Tancerel 2015-10-01  93  

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