Re: [PATCH v5 9/9] drivers: iio: imu: Add support for adis1657x family

[Dan Carpenter]

Hi Ramona,

kernel test robot noticed the following build warnings:

https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Ramona-Gradinariu/dt-bindings-iio-imu-Add-ADIS16501-compatibles/20240527-230203
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/20240527142618.275897-10-ramona.bolboaca13%40gmail.com
patch subject: [PATCH v5 9/9] drivers: iio: imu: Add support for adis1657x family
config: x86_64-randconfig-161-20240528 (https://download.01.org/0day-ci/archive/20240528/202405281539.EXGy0dhk-lkp@xxxxxxxxx/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0

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/202405281539.EXGy0dhk-lkp@xxxxxxxxx/

smatch warnings:
drivers/iio/imu/adis16475.c:1608 adis16475_push_single_sample() warn: missing error code? 'ret'

vim +/ret +1608 drivers/iio/imu/adis16475.c

c49e2871e50119 Ramona Gradinariu 2024-05-27  1577  static int adis16475_push_single_sample(struct iio_poll_func *pf)
fff7352bf7a3ce Nuno Sá           2020-04-13  1578  {
fff7352bf7a3ce Nuno Sá           2020-04-13  1579  	struct iio_dev *indio_dev = pf->indio_dev;
fff7352bf7a3ce Nuno Sá           2020-04-13  1580  	struct adis16475 *st = iio_priv(indio_dev);
fff7352bf7a3ce Nuno Sá           2020-04-13  1581  	struct adis *adis = &st->adis;
8f6bc87d67c030 Ramona Bolboaca   2023-08-08  1582  	int ret, bit, buff_offset = 0, i = 0;
fff7352bf7a3ce Nuno Sá           2020-04-13  1583  	__be16 *buffer;
fff7352bf7a3ce Nuno Sá           2020-04-13  1584  	u16 crc;
fff7352bf7a3ce Nuno Sá           2020-04-13  1585  	bool valid;
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1586  	u8 crc_offset = 9;
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1587  	u16 burst_size = ADIS16475_BURST_MAX_DATA;
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1588  	u16 start_idx = (st->info->flags & ADIS16475_HAS_TIMESTAMP32) ? 2 : 0;
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1589  
fff7352bf7a3ce Nuno Sá           2020-04-13  1590  	/* offset until the first element after gyro and accel */
fff7352bf7a3ce Nuno Sá           2020-04-13  1591  	const u8 offset = st->burst32 ? 13 : 7;
fff7352bf7a3ce Nuno Sá           2020-04-13  1592  
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1593  	if (st->burst32) {
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1594  		crc_offset = (st->info->flags & ADIS16475_HAS_TIMESTAMP32) ? 16 : 15;
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1595  		burst_size = adis->data->burst_max_len;
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1596  	}
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1597  
fff7352bf7a3ce Nuno Sá           2020-04-13  1598  	ret = spi_sync(adis->spi, &adis->msg);
fff7352bf7a3ce Nuno Sá           2020-04-13  1599  	if (ret)
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1600  		return ret;
fff7352bf7a3ce Nuno Sá           2020-04-13  1601  
fff7352bf7a3ce Nuno Sá           2020-04-13  1602  	buffer = adis->buffer;
fff7352bf7a3ce Nuno Sá           2020-04-13  1603  
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1604  	crc = be16_to_cpu(buffer[crc_offset]);
7f174ee4adeb12 Ramona Gradinariu 2024-05-27  1605  	valid = adis16475_validate_crc(adis->buffer, crc, burst_size, start_idx);
fff7352bf7a3ce Nuno Sá           2020-04-13  1606  	if (!valid) {
fff7352bf7a3ce Nuno Sá           2020-04-13  1607  		dev_err(&adis->spi->dev, "Invalid crc\n");
7f174ee4adeb12 Ramona Gradinariu 2024-05-27 @1608  		return ret;
                                                                ^^^^^^^^^^
return -EINVAL

fff7352bf7a3ce Nuno Sá           2020-04-13  1609  	}
fff7352bf7a3ce Nuno Sá           2020-04-13  1610  
fff7352bf7a3ce Nuno Sá           2020-04-13  1611  	for_each_set_bit(bit, indio_dev->active_scan_mask,
fff7352bf7a3ce Nuno Sá           2020-04-13  1612  			 indio_dev->masklength) {
fff7352bf7a3ce Nuno Sá           2020-04-13  1613  		/*
fff7352bf7a3ce Nuno Sá           2020-04-13  1614  		 * When burst mode is used, system flags is the first data
fff7352bf7a3ce Nuno Sá           2020-04-13  1615  		 * channel in the sequence, but the scan index is 7.
fff7352bf7a3ce Nuno Sá           2020-04-13  1616  		 */

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