acc_config is unsigned, so it won't be negative (line 390). julia ---------- Forwarded message ---------- Date: Mon, 14 Oct 2019 07:23:53 +0800 From: kbuild test robot <lkp@xxxxxxxxx> To: kbuild@xxxxxxxxxxxx Cc: Julia Lawall <julia.lawall@xxxxxxx> Subject: Re: [PATCH v3 2/2] iio: (bma400) add driver for the BMA400 Hi Dan, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on iio/togreg] [cannot apply to v5.4-rc2 next-20191011] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Dan-Robertson/iio-add-driver-for-Bosch-BMA400-accelerometer/20191014-035631 base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg :::::: branch date: 3 hours ago :::::: commit date: 3 hours ago If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> Reported-by: Julia Lawall <julia.lawall@xxxxxxx> >> drivers/iio/accel/bma400_core.c:390:6-16: WARNING: Unsigned expression compared with zero: acc_config < 0 # https://github.com/0day-ci/linux/commit/76b89222e99357a9fdbcfb61982e10d2fe74a409 git remote add linux-review https://github.com/0day-ci/linux git remote update linux-review git checkout 76b89222e99357a9fdbcfb61982e10d2fe74a409 vim +390 drivers/iio/accel/bma400_core.c 76b89222e99357 Dan Robertson 2019-10-12 372 76b89222e99357 Dan Robertson 2019-10-12 373 static int bma400_set_accel_oversampling_ratio(struct bma400_data *data, 76b89222e99357 Dan Robertson 2019-10-12 374 int val) 76b89222e99357 Dan Robertson 2019-10-12 375 { 76b89222e99357 Dan Robertson 2019-10-12 376 int ret; 76b89222e99357 Dan Robertson 2019-10-12 377 unsigned int acc_config; 76b89222e99357 Dan Robertson 2019-10-12 378 76b89222e99357 Dan Robertson 2019-10-12 379 if (val & ~BMA400_TWO_BITS_MASK) 76b89222e99357 Dan Robertson 2019-10-12 380 return -EINVAL; 76b89222e99357 Dan Robertson 2019-10-12 381 76b89222e99357 Dan Robertson 2019-10-12 382 /* 76b89222e99357 Dan Robertson 2019-10-12 383 * The oversampling ratio is stored in a different register 76b89222e99357 Dan Robertson 2019-10-12 384 * based on the power-mode. 76b89222e99357 Dan Robertson 2019-10-12 385 */ 76b89222e99357 Dan Robertson 2019-10-12 386 switch (data->power_mode) { 76b89222e99357 Dan Robertson 2019-10-12 387 case POWER_MODE_LOW: 76b89222e99357 Dan Robertson 2019-10-12 388 ret = regmap_read(data->regmap, BMA400_ACC_CONFIG0_REG, 76b89222e99357 Dan Robertson 2019-10-12 389 &acc_config); 76b89222e99357 Dan Robertson 2019-10-12 @390 if (acc_config < 0) 76b89222e99357 Dan Robertson 2019-10-12 391 return acc_config; 76b89222e99357 Dan Robertson 2019-10-12 392 76b89222e99357 Dan Robertson 2019-10-12 393 ret = regmap_write(data->regmap, BMA400_ACC_CONFIG0_REG, 76b89222e99357 Dan Robertson 2019-10-12 394 (acc_config & ~BMA400_LP_OSR_MASK) | 76b89222e99357 Dan Robertson 2019-10-12 395 (val << BMA400_LP_OSR_SHIFT)); 76b89222e99357 Dan Robertson 2019-10-12 396 if (ret < 0) { 76b89222e99357 Dan Robertson 2019-10-12 397 dev_err(data->dev, "Failed to write out OSR"); 76b89222e99357 Dan Robertson 2019-10-12 398 return ret; 76b89222e99357 Dan Robertson 2019-10-12 399 } 76b89222e99357 Dan Robertson 2019-10-12 400 76b89222e99357 Dan Robertson 2019-10-12 401 data->oversampling_ratio = val; 76b89222e99357 Dan Robertson 2019-10-12 402 return 0; 76b89222e99357 Dan Robertson 2019-10-12 403 case POWER_MODE_NORMAL: 76b89222e99357 Dan Robertson 2019-10-12 404 ret = regmap_read(data->regmap, BMA400_ACC_CONFIG1_REG, 76b89222e99357 Dan Robertson 2019-10-12 405 &acc_config); 76b89222e99357 Dan Robertson 2019-10-12 406 if (ret < 0) 76b89222e99357 Dan Robertson 2019-10-12 407 return ret; 76b89222e99357 Dan Robertson 2019-10-12 408 76b89222e99357 Dan Robertson 2019-10-12 409 ret = regmap_write(data->regmap, BMA400_ACC_CONFIG1_REG, 76b89222e99357 Dan Robertson 2019-10-12 410 (acc_config & ~BMA400_NP_OSR_MASK) | 76b89222e99357 Dan Robertson 2019-10-12 411 (val << BMA400_NP_OSR_SHIFT)); 76b89222e99357 Dan Robertson 2019-10-12 412 if (ret < 0) { 76b89222e99357 Dan Robertson 2019-10-12 413 dev_err(data->dev, "Failed to write out OSR"); 76b89222e99357 Dan Robertson 2019-10-12 414 return ret; 76b89222e99357 Dan Robertson 2019-10-12 415 } 76b89222e99357 Dan Robertson 2019-10-12 416 76b89222e99357 Dan Robertson 2019-10-12 417 data->oversampling_ratio = val; 76b89222e99357 Dan Robertson 2019-10-12 418 return 0; 76b89222e99357 Dan Robertson 2019-10-12 419 default: 76b89222e99357 Dan Robertson 2019-10-12 420 return -EINVAL; 76b89222e99357 Dan Robertson 2019-10-12 421 } 76b89222e99357 Dan Robertson 2019-10-12 422 return ret; 76b89222e99357 Dan Robertson 2019-10-12 423 } 76b89222e99357 Dan Robertson 2019-10-12 424 --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
