Re: [PATCH v5] iio: chemical: scd30: Replace manual locking with RAII locking

[kernel test robot]

Hi Maxwell,

kernel test robot noticed the following build errors:

[auto build test ERROR on jic23-iio/togreg]
[also build test ERROR on linus/master v7.1-rc5 next-20260528]
[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/Maxwell-Doose/iio-chemical-scd30-Replace-manual-locking-with-RAII-locking/20260529-063551
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/20260528222906.61561-1-m32285159%40gmail.com
patch subject: [PATCH v5] iio: chemical: scd30: Replace manual locking with RAII locking
config: hexagon-randconfig-r073-20260529 (https://download.01.org/0day-ci/archive/20260529/202605292103.zH0JgWhp-lkp@xxxxxxxxx/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
smatch: v0.5.0-9185-gbcc58b9c
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260529/202605292103.zH0JgWhp-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605292103.zH0JgWhp-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

>> drivers/iio/chemical/scd30_core.c:617:8: error: call to undeclared function 'scd30_trigger_handler_helper_locked'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     617 |         ret = scd30_trigger_handler_helper_locked(indio_dev, scan.data, sizeof(scan.data));
         |               ^
   drivers/iio/chemical/scd30_core.c:617:8: note: did you mean 'scd30_trigger_handler_helper'?
   drivers/iio/chemical/scd30_core.c:590:12: note: 'scd30_trigger_handler_helper' declared here
     590 | static int scd30_trigger_handler_helper(struct iio_dev *indio_dev, int *scan_data,
         |            ^
   1 error generated.


vim +/scd30_trigger_handler_helper_locked +617 drivers/iio/chemical/scd30_core.c

   606	
   607	static irqreturn_t scd30_trigger_handler(int irq, void *p)
   608	{
   609		struct iio_poll_func *pf = p;
   610		struct iio_dev *indio_dev = pf->indio_dev;
   611		struct {
   612			int data[SCD30_MEAS_COUNT];
   613			aligned_s64 ts;
   614		} scan = { };
   615		int ret;
   616	
 > 617		ret = scd30_trigger_handler_helper_locked(indio_dev, scan.data, sizeof(scan.data));
   618		if (ret)
   619			goto out;
   620	
   621		iio_push_to_buffers_with_ts(indio_dev, &scan, sizeof(scan),
   622					    iio_get_time_ns(indio_dev));
   623	out:
   624		iio_trigger_notify_done(indio_dev->trig);
   625		return IRQ_HANDLED;
   626	}
   627	

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