[intel-lts:6.18/linux 1/1] drivers/media/platform/intel/ipu-acpi.c:73:25: sparse: sparse: unsigned value that used to be signed checked against zero?

[intel-lts:6.18/linux 1/1] drivers/media/platform/intel/ipu-acpi.c:73:25: sparse: sparse: unsigned value that used to be signed checked against zero?

[kernel test robot]

:::::: 
:::::: Manual check reason: "low confidence static check first_new_problem: drivers/media/platform/intel/ipu-acpi.c:73:25: sparse: sparse: unsigned value that used to be signed checked against zero?"
:::::: 

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
TO: hepengpx <pengpengx.he@intel.com>
CC: "sys_oak" <sys_oak@intel.com>

tree:   https://github.com/intel/linux-intel-lts.git 6.18/linux
head:   5100e1c74efeba843945492f8d5840e6166c0392
commit: d1a4a0a2fedfc816e1f7db99c4858dfc0b8fd300 [1/1] media: pci: intel: support PDATA in Kconfig/Makefile
:::::: branch date: 10 days ago
:::::: commit date: 3 months ago
config: i386-randconfig-r123-20260708 (https://download.01.org/0day-ci/archive/20260709/202607091328.hDhinvap-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260709/202607091328.hDhinvap-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/r/202607091328.hDhinvap-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/media/platform/intel/ipu-acpi.c:73:25: sparse: sparse: unsigned value that used to be signed checked against zero?
   drivers/media/platform/intel/ipu-acpi.c:79:16: sparse: signed value source
--
>> drivers/media/platform/intel/ipu-acpi-pdata.c:36:30: sparse: sparse: symbol 'acpi_subdev_pdata' was not declared. Should it be static?
>> drivers/media/platform/intel/ipu-acpi-pdata.c:43:21: sparse: sparse: symbol 'serdes_info' was not declared. Should it be static?

vim +73 drivers/media/platform/intel/ipu-acpi.c

02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  68  
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  69  static int get_table_index(const char *acpi_name)
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  70  {
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  71  	int i;
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  72  
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08 @73  	for (i = 0; i < ARRAY_SIZE(supported_devices); i++) {
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  74  		if (!strncmp(supported_devices[i].hid_name, acpi_name,
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  75  			     strlen(supported_devices[i].hid_name)))
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  76  			return i;
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  77  	}
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  78  
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  79  	return -ENODEV;
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  80  }
02f6fe497a2baa Shahidan, Muhammad Shahmil 2026-04-08  81  

:::::: The code at line 73 was first introduced by commit
:::::: 02f6fe497a2baa45f229a6c4039418e423e8ece6 Add IPU ACPI drivers

:::::: TO: Shahidan, Muhammad Shahmil <muhammad.shahmil.shahidan@intel.com>
:::::: CC: sys_oak <sys_oak@intel.com>

--
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https://github.com/intel/lkp-tests/wiki