Re: [PATCH v3 2/2] iio: adc: ltc2309: add support for ltc2305
From: kernel test robot
Date: Mon Jan 26 2026 - 01:24:21 EST
Hi Kyle,
kernel test robot noticed the following build warnings:
[auto build test WARNING on 9448598b22c50c8a5bb77a9103e2d49f134c9578]
url: https://github.com/intel-lab-lkp/linux/commits/Kyle-Hsieh/dt-bindings-adc-ltc2497-add-support-for-ltc2305/20260126-093339
base: 9448598b22c50c8a5bb77a9103e2d49f134c9578
patch link: https://lore.kernel.org/r/20260126-add_ltc2305_driver-v3-2-951349a87f97%40gmail.com
patch subject: [PATCH v3 2/2] iio: adc: ltc2309: add support for ltc2305
config: i386-buildonly-randconfig-006-20260126 (https://download.01.org/0day-ci/archive/20260126/202601261441.M4qQzY72-lkp@xxxxxxxxx/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260126/202601261441.M4qQzY72-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/202601261441.M4qQzY72-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
>> drivers/iio/adc/ltc2309.c:209:20: warning: variable 'chip_info' is uninitialized when used here [-Wuninitialized]
209 | indio_dev->name = chip_info->name;
| ^~~~~~~~~
drivers/iio/adc/ltc2309.c:195:43: note: initialize the variable 'chip_info' to silence this warning
195 | const struct ltc2309_chip_info *chip_info;
| ^
| = NULL
1 warning generated.
vim +/chip_info +209 drivers/iio/adc/ltc2309.c
192
193 static int ltc2309_probe(struct i2c_client *client)
194 {
195 const struct ltc2309_chip_info *chip_info;
196 struct iio_dev *indio_dev;
197 struct ltc2309 *ltc2309;
198 int ret;
199
200 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*ltc2309));
201 if (!indio_dev)
202 return -ENOMEM;
203
204 ltc2309 = iio_priv(indio_dev);
205
206 ltc2309->dev = &indio_dev->dev;
207 ltc2309->client = client;
208
> 209 indio_dev->name = chip_info->name;
210 indio_dev->modes = INDIO_DIRECT_MODE;
211 indio_dev->channels = chip_info->channels;
212 indio_dev->num_channels = chip_info->num_channels;
213 indio_dev->info = <c2309_info;
214
215 ret = devm_regulator_get_enable_read_voltage(&client->dev, "vref");
216 if (ret < 0 && ret != -ENODEV)
217 return dev_err_probe(ltc2309->dev, ret,
218 "failed to get vref voltage\n");
219
220 ltc2309->vref_mv = ret == -ENODEV ? LTC2309_INTERNAL_REF_MV : ret / 1000;
221
222 mutex_init(<c2309->lock);
223
224 return devm_iio_device_register(&client->dev, indio_dev);
225 }
226
--
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https://github.com/intel/lkp-tests/wiki