Hi Marcelo, kernel test robot noticed the following build warnings: url: https://github.com/intel-lab-lkp/linux/commits/Marcelo-Schmitt/iio-adc-ad4030-Fix-_scale-for-when-oversampling-is-enabled/20250830-084901 base: 91812d3843409c235f336f32f1c37ddc790f1e03 patch link: https://lore.kernel.org/r/006ac88a667ce0d2c751946b562af83d0f27a44f.1756511030.git.marcelo.schmitt%40analog.com patch subject: [PATCH 15/15] iio: adc: ad4030: Add support for ADAQ4216 and ADAQ4224 config: x86_64-randconfig-161-20250831 (https://download.01.org/0day-ci/archive/20250831/202508310754.Y4V0Iq26-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0 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> | Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> | Closes: https://lore.kernel.org/r/202508310754.Y4V0Iq26-lkp@xxxxxxxxx/ smatch warnings: drivers/iio/adc/ad4030.c:515 ad4030_set_pga() error: 'scan_type' dereferencing possible ERR_PTR() vim +/scan_type +515 drivers/iio/adc/ad4030.c 8017880dd8ca3e Marcelo Schmitt 2025-08-29 502 static int ad4030_set_pga(struct iio_dev *indio_dev, 8017880dd8ca3e Marcelo Schmitt 2025-08-29 503 struct iio_chan_spec const *chan, int gain_int, 8017880dd8ca3e Marcelo Schmitt 2025-08-29 504 int gain_fract) 8017880dd8ca3e Marcelo Schmitt 2025-08-29 505 { 8017880dd8ca3e Marcelo Schmitt 2025-08-29 506 struct ad4030_state *st = iio_priv(indio_dev); 8017880dd8ca3e Marcelo Schmitt 2025-08-29 507 const struct iio_scan_type *scan_type; 8017880dd8ca3e Marcelo Schmitt 2025-08-29 508 unsigned int mag_bits; 8017880dd8ca3e Marcelo Schmitt 2025-08-29 509 u64 gain_nano, tmp; 8017880dd8ca3e Marcelo Schmitt 2025-08-29 510 8017880dd8ca3e Marcelo Schmitt 2025-08-29 511 if (!st->pga_gpios) 8017880dd8ca3e Marcelo Schmitt 2025-08-29 512 return -EINVAL; 8017880dd8ca3e Marcelo Schmitt 2025-08-29 513 8017880dd8ca3e Marcelo Schmitt 2025-08-29 514 scan_type = iio_get_current_scan_type(indio_dev, chan); if (IS_ERR(scan_type)) return PTR_ERR(scan_type); 8017880dd8ca3e Marcelo Schmitt 2025-08-29 @515 if (scan_type->sign == 's') 8017880dd8ca3e Marcelo Schmitt 2025-08-29 516 mag_bits = st->chip->precision_bits - 1; 8017880dd8ca3e Marcelo Schmitt 2025-08-29 517 else 8017880dd8ca3e Marcelo Schmitt 2025-08-29 518 mag_bits = st->chip->precision_bits; 8017880dd8ca3e Marcelo Schmitt 2025-08-29 519 8017880dd8ca3e Marcelo Schmitt 2025-08-29 520 gain_nano = gain_int * NANO + gain_fract; 8017880dd8ca3e Marcelo Schmitt 2025-08-29 521 8017880dd8ca3e Marcelo Schmitt 2025-08-29 522 if (!in_range(gain_nano, 0, ADAQ4616_GAIN_MAX_NANO)) 8017880dd8ca3e Marcelo Schmitt 2025-08-29 523 return -EINVAL; 8017880dd8ca3e Marcelo Schmitt 2025-08-29 524 8017880dd8ca3e Marcelo Schmitt 2025-08-29 525 tmp = DIV_ROUND_CLOSEST_ULL(gain_nano << mag_bits, NANO); 8017880dd8ca3e Marcelo Schmitt 2025-08-29 526 gain_nano = DIV_ROUND_CLOSEST_ULL(st->vref_uv, tmp); 8017880dd8ca3e Marcelo Schmitt 2025-08-29 527 st->pga_index = find_closest(gain_nano, ad4030_hw_gains, 8017880dd8ca3e Marcelo Schmitt 2025-08-29 528 ARRAY_SIZE(ad4030_hw_gains)); 8017880dd8ca3e Marcelo Schmitt 2025-08-29 529 8017880dd8ca3e Marcelo Schmitt 2025-08-29 530 return ad4030_set_pga_gain(st); 8017880dd8ca3e Marcelo Schmitt 2025-08-29 531 } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
