drivers/nvmem/m24lr.c:343:24: sparse: sparse: cast to restricted __le16

drivers/nvmem/m24lr.c:343:24: sparse: sparse: cast to restricted __le16

[kernel test robot]

Hi Bartosz,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9b87fdc9af2fbfcdb5c24a64139685ef80f6573f
commit: cf09b7a05618bea99468b67fe80202efba1b48ad eeprom: move nvmem EEPROM drivers to drivers/nvmem/
date:   7 weeks ago
config: x86_64-randconfig-1301-20260917 (https://download.01.org/0day-ci/archive/20260917/202609171615.pqY38RUJ-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/20260917/202609171615.pqY38RUJ-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
| Fixes: cf09b7a05618 ("eeprom: move nvmem EEPROM drivers to drivers/nvmem/")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609171615.pqY38RUJ-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/nvmem/m24lr.c:343:24: sparse: sparse: cast to restricted __le16
>> drivers/nvmem/m24lr.c:343:24: sparse: sparse: cast from restricted __le64
>> drivers/nvmem/m24lr.c:346:24: sparse: sparse: cast to restricted __le32
   drivers/nvmem/m24lr.c:346:24: sparse: sparse: cast from restricted __le64

vim +343 drivers/nvmem/m24lr.c

cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  323  
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  324  static ssize_t m24lr_read_reg_le(struct m24lr *m24lr, u64 *val,
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  325  				 unsigned int reg_addr,
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  326  				 unsigned int reg_size)
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  327  {
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  328  	ssize_t ret;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  329  	__le64 input = 0;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  330  
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  331  	ret = m24lr_read(m24lr, (u8 *)&input, reg_size, reg_addr, false);
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  332  	if (IS_ERR_VALUE(ret))
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  333  		return ret;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  334  
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  335  	if (ret != reg_size)
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  336  		return -EINVAL;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  337  
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  338  	switch (reg_size) {
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  339  	case 1:
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  340  		*val = *(u8 *)&input;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  341  		break;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  342  	case 2:
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17 @343  		*val = le16_to_cpu((__le16)input);
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  344  		break;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  345  	case 4:
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17 @346  		*val = le32_to_cpu((__le32)input);
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  347  		break;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  348  	case 8:
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  349  		*val = le64_to_cpu((__le64)input);
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  350  		break;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  351  	default:
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  352  		return -EINVAL;
b009c1dbfc9854c drivers/misc/eeprom/m24lr.c Chen Ni              2025-08-21  353  	}
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  354  
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  355  	return 0;
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  356  }
cd5c5e0231c538a drivers/misc/eeprom/m24lr.c Abd-Alrhman Masalkhi 2025-07-17  357  

:::::: The code at line 343 was first introduced by commit
:::::: cd5c5e0231c538a5d2d4a73f3b3ffc77ff08449c eeprom: add driver for ST M24LR series RFID/NFC EEPROM chips

:::::: TO: Abd-Alrhman Masalkhi <abd.masalkhi@gmail.com>
:::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki