Re: [PATCH] iio:proximity:hx9031as: Add TYHX HX9031AS/HX9023S sensor driver

[kernel test robot <lkp@intel.com>]

Hi Yasin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on jic23-iio/togreg]
[also build test WARNING on linus/master v6.9-rc7 next-20240510]
[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/Yasin-Lee/iio-proximity-hx9031as-Add-TYHX-HX9031AS-HX9023S-sensor-driver/20240510-173839
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
patch link:    https://lore.kernel.org/r/SN7PR12MB8101EDFA7F91A59761095A28A4E72%40SN7PR12MB8101.namprd12.prod.outlook.com
patch subject: [PATCH] iio:proximity:hx9031as: Add TYHX HX9031AS/HX9023S sensor driver
config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20240512/202405120331.GAhwezaB-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project b910bebc300dafb30569cecc3017b446ea8eafa0)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240512/202405120331.GAhwezaB-lkp@intel.com/reproduce)

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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405120331.GAhwezaB-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/iio/proximity/hx9031as.c:12:
   In file included from include/linux/i2c.h:19:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:26:
   In file included from include/linux/kernel_stat.h:9:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     560 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
         |                                                   ^
   In file included from drivers/iio/proximity/hx9031as.c:12:
   In file included from include/linux/i2c.h:19:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:26:
   In file included from include/linux/kernel_stat.h:9:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
         |                                                   ^
   In file included from drivers/iio/proximity/hx9031as.c:12:
   In file included from include/linux/i2c.h:19:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:13:
   In file included from include/linux/cgroup.h:26:
   In file included from include/linux/kernel_stat.h:9:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/hexagon/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   In file included from drivers/iio/proximity/hx9031as.c:12:
   In file included from include/linux/i2c.h:19:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:21:
   In file included from include/linux/mm.h:2208:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> drivers/iio/proximity/hx9031as.c:1478:16: warning: stack frame size (1072) exceeds limit (1024) in 'hx9031as_dump_show' [-Wframe-larger-than]
    1478 | static ssize_t hx9031as_dump_show(struct file *file, char __user *user_buf, size_t count, loff_t *ppos)
         |                ^
   8 warnings generated.


vim +/hx9031as_dump_show +1478 drivers/iio/proximity/hx9031as.c

  1477	
> 1478	static ssize_t hx9031as_dump_show(struct file *file, char __user *user_buf, size_t count, loff_t *ppos)
  1479	{
  1480		int ret = -1;
  1481		uint8_t rx_buf[1] = {0};
  1482		char buf[BUF_SIZE * 2] = {0};
  1483		char *p = buf;
  1484		int ii = 0;
  1485	
  1486		for (ii = 0; ii < ARRAY_SIZE(hx9031as_reg_init_list); ii++) {
  1487			ret = hx9031as_read(hx9031as_reg_init_list[ii].addr, rx_buf, 1);
  1488			if (ret != 0)
  1489				PRINT_ERR("hx9031as_read failed\n");
  1490			PRINT_INF("0x%02X=0x%02X\n", hx9031as_reg_init_list[ii].addr, rx_buf[0]);
  1491			p += snprintf(p, PAGE_SIZE, "0x%02X=0x%02X\n", hx9031as_reg_init_list[ii].addr, rx_buf[0]);
  1492		}
  1493	
  1494		p += snprintf(p, PAGE_SIZE, "driver version:%s\n", HX9031AS_DRIVER_VER);
  1495	
  1496		return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
  1497	}
  1498	

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