Hi Christian, I love your patch! Perhaps something to improve: [auto build test WARNING on iio/togreg] [also build test WARNING on robh/for-next linux/master linus/master v5.8-rc7 next-20200727] [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/Christian-Eggers/dt-bindings-iio-light-add-AMS-AS73211-support/20200727-234842 base: https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg config: sparc64-randconfig-s031-20200728 (attached as .config) compiler: sparc64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-94-geb6779f6-dirty # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=sparc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/iio/light/as73211.c:473:35: sparse: sparse: cast to restricted __le16 >> drivers/iio/light/as73211.c:473:35: sparse: sparse: cast to restricted __le16 >> drivers/iio/light/as73211.c:473:35: sparse: sparse: cast to restricted __le16 >> drivers/iio/light/as73211.c:473:35: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:477:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:477:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:477:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:477:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:478:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:478:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:478:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:478:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:479:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:479:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:479:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:479:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:498:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:498:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:498:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:498:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:499:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:499:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:499:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:499:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:500:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:500:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:500:43: sparse: sparse: cast to restricted __le16 drivers/iio/light/as73211.c:500:43: sparse: sparse: cast to restricted __le16 vim +473 drivers/iio/light/as73211.c 439 440 static irqreturn_t as73211_trigger_handler(int irq __always_unused, void *p) 441 { 442 struct iio_poll_func *pf = p; 443 struct iio_dev *indio_dev = pf->indio_dev; 444 struct as73211_data *data = iio_priv(indio_dev); 445 int data_result, ret; 446 447 mutex_lock(&data->mutex); 448 449 data_result = as73211_req_data(data); 450 451 /* Optimization for reading all (color + temperature) channels */ 452 if (*indio_dev->active_scan_mask == 0xf) { 453 u8 addr = as73211_channels[0].address; 454 struct i2c_msg msgs[] = { 455 { 456 .addr = data->client->addr, 457 .flags = 0, 458 .len = 1, 459 .buf = &addr 460 }, 461 { 462 .addr = data->client->addr, 463 .flags = I2C_M_RD, 464 .len = 4 * sizeof(*data->buffer), 465 .buf = (u8 *)&data->buffer[0] 466 }, 467 }; 468 ret = i2c_transfer(data->client->adapter, msgs, ARRAY_SIZE(msgs)); 469 if (ret < 0) 470 goto done; 471 472 /* Temperature channel is not affected by overflows */ > 473 data->buffer[0] = le16_to_cpu(data->buffer[0]); 474 475 if (data_result == 0) { 476 /* convert byte order (AS73211 sends LSB first) */ 477 data->buffer[1] = le16_to_cpu(data->buffer[1]); 478 data->buffer[2] = le16_to_cpu(data->buffer[2]); 479 data->buffer[3] = le16_to_cpu(data->buffer[3]); 480 } else { 481 /* saturate all channels (useful for overflows) */ 482 data->buffer[1] = 0xffff; 483 data->buffer[2] = 0xffff; 484 data->buffer[3] = 0xffff; 485 } 486 487 } 488 /* Optimization for reading all color channels */ 489 else if (*indio_dev->active_scan_mask == 0xe) { 490 /* AS73211 starts reading at address 2 */ 491 ret = i2c_master_recv(data->client, 492 (char *)&data->buffer[1], 3 * sizeof(*data->buffer)); 493 if (ret < 0) 494 goto done; 495 496 if (data_result == 0) { 497 /* convert byte order (as73211 sends LSB first) */ 498 data->buffer[1] = le16_to_cpu(data->buffer[1]); 499 data->buffer[2] = le16_to_cpu(data->buffer[2]); 500 data->buffer[3] = le16_to_cpu(data->buffer[3]); 501 } else { 502 /* saturate all channels (useful for overflows) */ 503 data->buffer[1] = 0xffff; 504 data->buffer[2] = 0xffff; 505 data->buffer[3] = 0xffff; 506 } 507 } else { 508 unsigned int i, j = 0; 509 510 /* generic case */ 511 for_each_set_bit(i, indio_dev->active_scan_mask, indio_dev->masklength) { 512 struct iio_chan_spec const *channel = &as73211_channels[i]; 513 514 /* Read data even on error in order to avoid "result buffer overrun" */ 515 ret = i2c_smbus_read_word_data(data->client, 516 channel->address); 517 if (ret < 0) 518 goto done; 519 520 if (data_result == 0) { 521 data->buffer[j++] = ret; 522 } else { 523 /* saturate all channels (useful for overflows) */ 524 data->buffer[j++] = 0xffff; 525 } 526 } 527 } 528 529 iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, 530 iio_get_time_ns(indio_dev)); 531 532 done: 533 mutex_unlock(&data->mutex); 534 iio_trigger_notify_done(indio_dev->trig); 535 536 return IRQ_HANDLED; 537 } 538 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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