drivers/input/misc/iqs626a.c:1645:12: warning: stack frame size (2448) exceeds limit (2048) in 'iqs626_probe'

kernel test robot
2021-11-26T14:30:57Z

Hi Jeff,

FYI, the error/warning still remains.

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: a4849f6000e29235a2707f22e39da6b897bb9543
commit: f1d2809de97adc422967b6de59f0f6199769eb93 Input: Add support for Azoteq IQS626A
date: 8 months ago
config: mips-randconfig-r013-20211124 (https://download.01.org/0day-ci/archive/20211126/202111262250.Y0l0olCY-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 67a1c45def8a75061203461ab0060c75c864df1c)
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
# install mips cross compiling tool for clang build
# apt-get install binutils-mips-linux-gnu
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f1d2809de97adc422967b6de59f0f6199769eb93
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout f1d2809de97adc422967b6de59f0f6199769eb93
# save the config file to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=mips

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/input/misc/iqs626a.c:1645:12: warning: stack frame size (2448) exceeds limit (2048) in 'iqs626_probe' [-Wframe-larger-than]
static int iqs626_probe(struct i2c_client *client)
^
1 warning generated.
Assembler messages:
Warning: a different -march was already specified, is now octeon

vim +/iqs626_probe +1645 drivers/input/misc/iqs626a.c

1644
> 1645 static int iqs626_probe(struct i2c_client *client)
1646 {
1647 struct iqs626_ver_info ver_info;
1648 struct iqs626_private *iqs626;
1649 int error;
1650
1651 iqs626 = devm_kzalloc(&client->dev, sizeof(*iqs626), GFP_KERNEL);
1652 if (!iqs626)
1653 return -ENOMEM;
1654
1655 i2c_set_clientdata(client, iqs626);
1656 iqs626->client = client;
1657
1658 iqs626->regmap = devm_regmap_init_i2c(client, &iqs626_regmap_config);
1659 if (IS_ERR(iqs626->regmap)) {
1660 error = PTR_ERR(iqs626->regmap);
1661 dev_err(&client->dev, "Failed to initialize register map: %d\n",
1662 error);
1663 return error;
1664 }
1665
1666 init_completion(&iqs626->ati_done);
1667
1668 error = regmap_raw_read(iqs626->regmap, IQS626_VER_INFO, &ver_info,
1669 sizeof(ver_info));
1670 if (error)
1671 return error;
1672
1673 if (ver_info.prod_num != IQS626_VER_INFO_PROD_NUM) {
1674 dev_err(&client->dev, "Unrecognized product number: 0x%02X\n",
1675 ver_info.prod_num);
1676 return -EINVAL;
1677 }
1678
1679 error = iqs626_parse_prop(iqs626);
1680 if (error)
1681 return error;
1682
1683 error = iqs626_input_init(iqs626);
1684 if (error)
1685 return error;
1686
1687 error = devm_request_threaded_irq(&client->dev, client->irq,
1688 NULL, iqs626_irq, IRQF_ONESHOT,
1689 client->name, iqs626);
1690 if (error) {
1691 dev_err(&client->dev, "Failed to request IRQ: %d\n", error);
1692 return error;
1693 }
1694
1695 if (!wait_for_completion_timeout(&iqs626->ati_done,
1696 msecs_to_jiffies(2000))) {
1697 dev_err(&client->dev, "Failed to complete ATI\n");
1698 return -ETIMEDOUT;
1699 }
1700
1701 /*
1702 * The keypad may include one or more switches and is not registered
1703 * until ATI is complete and the initial switch states are read.
1704 */
1705 error = input_register_device(iqs626->keypad);
1706 if (error)
1707 dev_err(&client->dev, "Failed to register keypad: %d\n", error);
1708
1709 return error;
1710 }
1711

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0-DAY CI Kernel Test Service, Intel Corporation