Hi Caleb, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on robh/for-next] [also build test WARNING on jic23-iio/togreg lee-mfd/for-mfd-next linus/master v5.17-rc4 next-20220215] [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/Caleb-Connolly/iio-adc-introduce... base: https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20220216/202202161429.mqmnE8To-lk...) compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/c0b026333a7bf04ff90864bda97632b87... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Caleb-Connolly/iio-adc-introduce-Qualcomm-SPMI-Round-Robin-ADC/20220216-011807 git checkout c0b026333a7bf04ff90864bda97632b87fa5a090 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm SHELL=/bin/bash drivers/iio/adc/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/device.h:15, from include/linux/platform_device.h:13, from drivers/iio/adc/qcom-spmi-rradc.c:15: drivers/iio/adc/qcom-spmi-rradc.c: In function 'rradc_read_raw': 742 | dev_err(chip->dev, "Invalid channel index:%d\n", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/dev_printk.h:110:30: note: in definition of macro 'dev_printk_index_wrap' 110 | _p_func(dev, fmt, ##__VA_ARGS__); \ | ^~~ include/linux/dev_printk.h:144:56: note: in expansion of macro 'dev_fmt' 144 | dev_printk_index_wrap(_dev_err, KERN_ERR, dev, dev_fmt(fmt), ##__VA_ARGS__) | ^~~~~~~ drivers/iio/adc/qcom-spmi-rradc.c:742:17: note: in expansion of macro 'dev_err' 742 | dev_err(chip->dev, "Invalid channel index:%d\n", | ^~~~~~~ drivers/iio/adc/qcom-spmi-rradc.c:742:60: note: format string is defined here 742 | dev_err(chip->dev, "Invalid channel index:%d\n", | ~^ | | | int | %ld vim +742 drivers/iio/adc/qcom-spmi-rradc.c 731 732 static int rradc_read_raw(struct iio_dev *indio_dev, 733 struct iio_chan_spec const *chan_spec, int *val, 734 int *val2, long mask) 735 { 736 struct rradc_chip *chip = iio_priv(indio_dev); 737 const struct rradc_channel *chan; 738 int ret; 739 u16 adc_code; 740 741 if (chan_spec->address >= RR_ADC_CHAN_MAX) { 743 chan_spec->address); 744 return -EINVAL; 745 } 746 747 switch (mask) { 748 case IIO_CHAN_INFO_SCALE: 749 return rradc_read_scale(chip, chan_spec->address, val, val2); 750 case IIO_CHAN_INFO_OFFSET: 751 return rradc_read_offset(chip, chan_spec->address, val); 752 case IIO_CHAN_INFO_RAW: 753 chan = &rradc_chans[chan_spec->address]; 754 ret = rradc_do_conversion(chip, chan_spec->address, &adc_code); 755 if (ret < 0) 756 return ret; 757 758 *val = adc_code; 759 return IIO_VAL_INT; 760 case IIO_CHAN_INFO_PROCESSED: 761 chan = &rradc_chans[chan_spec->address]; 762 if (!chan->scale_fn) 763 return -EINVAL; 764 ret = rradc_do_conversion(chip, chan_spec->address, &adc_code); 765 if (ret < 0) 766 return ret; 767 768 *val = chan->scale_fn(chip, adc_code, val); 769 return IIO_VAL_INT; 770 default: 771 return -EINVAL; 772 } 773 } 774 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org