Re: [PATCH v8 1/4] iio: pressure: bmp280: Use sleep and forced mode for oneshot captures
From: kernel test robot
Date: Fri Oct 11 2024 - 00:33:54 EST
Hi Vasileios,
kernel test robot noticed the following build warnings:
[auto build test WARNING on 96be67caa0f0420d4128cb67f07bbd7a6f49e03a]
url: https://github.com/intel-lab-lkp/linux/commits/Vasileios-Amoiridis/iio-pressure-bmp280-Use-sleep-and-forced-mode-for-oneshot-captures/20241008-035238
base: 96be67caa0f0420d4128cb67f07bbd7a6f49e03a
patch link: https://lore.kernel.org/r/20241007194945.66192-2-vassilisamir%40gmail.com
patch subject: [PATCH v8 1/4] iio: pressure: bmp280: Use sleep and forced mode for oneshot captures
config: i386-randconfig-006-20241011 (https://download.01.org/0day-ci/archive/20241011/202410111221.YIeXHxOv-lkp@xxxxxxxxx/config)
compiler: clang version 18.1.8 (https://github.com/llvm/llvm-project 3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241011/202410111221.YIeXHxOv-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/202410111221.YIeXHxOv-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
>> drivers/iio/pressure/bmp280-core.c:1051:3: warning: variable 'meas_time_us' is uninitialized when used here [-Wuninitialized]
1051 | meas_time_us += BMP280_PRESS_HUMID_MEAS_OFFSET +
| ^~~~~~~~~~~~
drivers/iio/pressure/bmp280-core.c:1046:32: note: initialize the variable 'meas_time_us' to silence this warning
1046 | unsigned int reg, meas_time_us;
| ^
| = 0
drivers/iio/pressure/bmp280-core.c:2452:2: warning: variable 'offset' is uninitialized when used here [-Wuninitialized]
2452 | offset += sizeof(s32);
| ^~~~~~
drivers/iio/pressure/bmp280-core.c:2437:17: note: initialize the variable 'offset' to silence this warning
2437 | int ret, offset;
| ^
| = 0
2 warnings generated.
vim +/meas_time_us +1051 drivers/iio/pressure/bmp280-core.c
1043
1044 static int bmp280_wait_conv(struct bmp280_data *data)
1045 {
1046 unsigned int reg, meas_time_us;
1047 int ret;
1048
1049 /* Check if we are using a BME280 device */
1050 if (data->oversampling_humid)
> 1051 meas_time_us += BMP280_PRESS_HUMID_MEAS_OFFSET +
1052 BIT(data->oversampling_humid) * BMP280_MEAS_DUR;
1053
1054 /* Pressure measurement time */
1055 meas_time_us += BMP280_PRESS_HUMID_MEAS_OFFSET +
1056 BIT(data->oversampling_press) * BMP280_MEAS_DUR;
1057
1058 /* Temperature measurement time */
1059 meas_time_us += BIT(data->oversampling_temp) * BMP280_MEAS_DUR;
1060
1061 /* Waiting time according to the BM(P/E)2 Sensor API */
1062 fsleep(meas_time_us);
1063
1064 ret = regmap_read(data->regmap, BMP280_REG_STATUS, ®);
1065 if (ret) {
1066 dev_err(data->dev, "failed to read status register.\n");
1067 return ret;
1068 }
1069
1070 if (reg & BMP280_REG_STATUS_MEAS_BIT) {
1071 dev_err(data->dev, "Measurement cycle didn't complete.\n");
1072 return -EBUSY;
1073 }
1074
1075 return 0;
1076 }
1077
--
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