Re: [PATCH] i2c: Use u8 type in i2c transfer calls

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Hi Jason,

I love your patch! Yet something to improve:

[auto build test ERROR on wsa/i2c/for-next]
[also build test ERROR on linus/master v5.19-rc7 next-20220718]
[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#_base_tree_information]

url: https://github.com/intel-lab-lkp/linux/commits/Jason-Gerecke/i2c-Use-u8-type-in-i2c-transfer-calls/20220718-233658 base: https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git i2c/for-next config: hexagon-randconfig-r026-20220718 (https://download.01.org/0day-ci/archive/20220719/202207190634.ToyhlXSz-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d74b88c69dc2644bd0dc5d64e2d7413a0d4040e5)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
# https://github.com/intel-lab-lkp/linux/commit/9732240c23a365c0590f05ce83196869235a2ea7
        git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Jason-Gerecke/i2c-Use-u8-type-in-i2c-transfer-calls/20220718-233658
        git checkout 9732240c23a365c0590f05ce83196869235a2ea7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/iio/adc/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

drivers/iio/adc/max1363.c:1645:12: error: incompatible function pointer types assigning to 'int (*)(const struct i2c_client *, const char *, int)' from 'int (const struct i2c_client *, const u8 *, int)' (aka 'int (const struct i2c_client *, const unsigned char *, int)') [-Werror,-Wincompatible-function-pointer-types]
                   st->send = i2c_master_send;
                            ^ ~~~~~~~~~~~~~~~
drivers/iio/adc/max1363.c:1646:12: error: incompatible function pointer types assigning to 'int (*)(const struct i2c_client *, char *, int)' from 'int (const struct i2c_client *, u8 *, int)' (aka 'int (const struct i2c_client *, unsigned char *, int)') [-Werror,-Wincompatible-function-pointer-types]
                   st->recv = i2c_master_recv;
                            ^ ~~~~~~~~~~~~~~~
   2 errors generated.


vim +1645 drivers/iio/adc/max1363.c

a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1584 fc52692c49969e drivers/iio/adc/max1363.c Greg Kroah-Hartman 2012-12-21 1585 static int max1363_probe(struct i2c_client *client, d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1586 const struct i2c_device_id *id) d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1587 { cd4361c7e2e077 drivers/staging/iio/adc/max1363_core.c Michael Hennerich 2012-02-22 1588 int ret; 3dba81ba803ca0 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-04-15 1589 struct max1363_state *st; 3dba81ba803ca0 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-04-15 1590 struct iio_dev *indio_dev; a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1591 struct regulator *vref; d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1592 6917e1d9af2c50 drivers/iio/adc/max1363.c Sachin Kamat 2013-07-22 1593 indio_dev = devm_iio_device_alloc(&client->dev, 6917e1d9af2c50 drivers/iio/adc/max1363.c Sachin Kamat 2013-07-22 1594 sizeof(struct max1363_state)); 6917e1d9af2c50 drivers/iio/adc/max1363.c Sachin Kamat 2013-07-22 1595 if (!indio_dev) 6917e1d9af2c50 drivers/iio/adc/max1363.c Sachin Kamat 2013-07-22 1596 return -ENOMEM; b77b8f8c20c83c drivers/staging/iio/adc/max1363.c Jonathan Cameron 2012-10-06 1597 a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1598 ret = devm_iio_map_array_register(&client->dev, indio_dev, a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1599 client->dev.platform_data); 0b27d678c7fbeb drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2012-04-10 1600 if (ret < 0) 6917e1d9af2c50 drivers/iio/adc/max1363.c Sachin Kamat 2013-07-22 1601 return ret; b77b8f8c20c83c drivers/staging/iio/adc/max1363.c Jonathan Cameron 2012-10-06 1602 3dba81ba803ca0 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-04-15 1603 st = iio_priv(indio_dev); b77b8f8c20c83c drivers/staging/iio/adc/max1363.c Jonathan Cameron 2012-10-06 1604 bf09cddb2cd402 drivers/iio/adc/max1363.c Rohit Sarkar 2020-03-15 1605 mutex_init(&st->lock); 7c3e8675f37503 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1606 st->reg = devm_regulator_get(&client->dev, "vcc"); a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1607 if (IS_ERR(st->reg)) a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1608 return PTR_ERR(st->reg); b77b8f8c20c83c drivers/staging/iio/adc/max1363.c Jonathan Cameron 2012-10-06 1609 b77b8f8c20c83c drivers/staging/iio/adc/max1363.c Jonathan Cameron 2012-10-06 1610 ret = regulator_enable(st->reg); b77b8f8c20c83c drivers/staging/iio/adc/max1363.c Jonathan Cameron 2012-10-06 1611 if (ret) a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1612 return ret; b77b8f8c20c83c drivers/staging/iio/adc/max1363.c Jonathan Cameron 2012-10-06 1613 a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1614 ret = devm_add_action_or_reset(&client->dev, max1363_reg_disable, st->reg); a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1615 if (ret) a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1616 return ret; 3dba81ba803ca0 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-04-15 1617 f84ff467c0ce5b drivers/iio/adc/max1363.c Jonathan Cameron 2020-06-28 1618 st->chip_info = device_get_match_data(&client->dev); 794ac821cc44e4 drivers/iio/adc/max1363.c Julia Lawall 2018-05-21 1619 if (!st->chip_info) 3dba81ba803ca0 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-04-15 1620 st->chip_info = &max1363_chip_info_tbl[id->driver_data]; 3dba81ba803ca0 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-04-15 1621 st->client = client; 3dba81ba803ca0 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-04-15 1622 a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1623 st->vref_uv = st->chip_info->int_vref_mv * 1000; 55b40d37311807 drivers/iio/adc/max1363.c Guenter Roeck 2014-01-27 1624 vref = devm_regulator_get_optional(&client->dev, "vref"); a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1625 if (!IS_ERR(vref)) { a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1626 int vref_uv; a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1627 a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1628 ret = regulator_enable(vref); a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1629 if (ret) a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1630 return ret; a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1631 a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1632 ret = devm_add_action_or_reset(&client->dev, max1363_reg_disable, vref); a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1633 if (ret) a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1634 return ret; a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1635 a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1636 st->vref = vref; a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1637 vref_uv = regulator_get_voltage(vref); a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1638 if (vref_uv <= 0) a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1639 return -EINVAL; a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1640 a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1641 st->vref_uv = vref_uv; a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1642 } a405b00e4470b1 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1643 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 1644 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 @1645 st->send = i2c_master_send; 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 @1646 st->recv = i2c_master_recv; 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 1647 } else if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE) 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 1648 && st->chip_info->bits == 8) { 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 1649 st->send = max1363_smbus_send; 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 1650 st->recv = max1363_smbus_recv; 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 1651 } else { a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1652 return -EOPNOTSUPP; 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 1653 } 61bdda69222c09 drivers/iio/adc/max1363.c Vivien Didelot 2013-10-20 1654 cd4361c7e2e077 drivers/staging/iio/adc/max1363_core.c Michael Hennerich 2012-02-22 1655 ret = max1363_alloc_scan_masks(indio_dev); cd4361c7e2e077 drivers/staging/iio/adc/max1363_core.c Michael Hennerich 2012-02-22 1656 if (ret) a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1657 return ret; 82020b0ef15de0 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2010-05-04 1658 845bd12ac78f92 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1659 indio_dev->name = id->name; 8e7d967244a8ee drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-08-30 1660 indio_dev->channels = st->chip_info->channels; 8e7d967244a8ee drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-08-30 1661 indio_dev->num_channels = st->chip_info->num_channels; 6fe8135fccd66a drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1662 indio_dev->info = st->chip_info->info; 6fe8135fccd66a drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1663 indio_dev->modes = INDIO_DIRECT_MODE; d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1664 ret = max1363_initial_setup(st); 58f0a255454dc2 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1665 if (ret < 0) a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1666 return ret; d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1667 a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1668 ret = devm_iio_triggered_buffer_setup(&client->dev, indio_dev, NULL, 7a1aeba7ed0d5a drivers/iio/adc/max1363.c Lars-Peter Clausen 2013-09-16 1669 &max1363_trigger_handler, NULL); d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1670 if (ret) a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1671 return ret; d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1672 6fe8135fccd66a drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1673 if (client->irq) { 7c3e8675f37503 drivers/iio/adc/max1363.c Guenter Roeck 2013-02-03 1674 ret = devm_request_threaded_irq(&client->dev, st->client->irq, aaf370db7dad57 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1675 NULL, aaf370db7dad57 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1676 &max1363_event_handler, aaf370db7dad57 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1677 IRQF_TRIGGER_RISING | IRQF_ONESHOT, aaf370db7dad57 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1678 "max1363_event", aaf370db7dad57 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1679 indio_dev); 298cd976e07f1a drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2011-05-18 1680 440a5200347734 drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2010-06-26 1681 if (ret) d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1682 return ret; d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1683 } d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1684 a1ff6d25261315 drivers/iio/adc/max1363.c Alexandru Ardelean 2021-09-26 1685 return devm_iio_device_register(&client->dev, indio_dev); d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1686 } d1325cf45077bd drivers/staging/iio/adc/max1363_core.c Jonathan Cameron 2009-08-18 1687
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