Re: [PATCH v3 1/2] nvmem: Add driver for the eeprom in qnap-mcu controllers

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

Hi Heiko,

kernel test robot noticed the following build errors:

[auto build test ERROR on lee-leds/for-leds-next]
[also build test ERROR on lee-mfd/for-mfd-next lee-mfd/for-mfd-fixes linus/master v6.18-rc4 next-20251103]
[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/Heiko-Stuebner/nvmem-Add-driver-for-the-eeprom-in-qnap-mcu-controllers/20251103-004523
base:   https://git.kernel.org/pub/scm/linux/kernel/git/lee/leds.git for-leds-next
patch link:    https://lore.kernel.org/r/20251102163955.294427-2-heiko%40sntech.de
patch subject: [PATCH v3 1/2] nvmem: Add driver for the eeprom in qnap-mcu controllers
config: hexagon-allmodconfig (https://download.01.org/0day-ci/archive/20251104/202511040659.c2R6OqbJ-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251104/202511040659.c2R6OqbJ-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/202511040659.c2R6OqbJ-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/nvmem/qnap-mcu-eeprom.c:28:10: error: call to undeclared function 'kzalloc'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      28 |         reply = kzalloc(bytes + sizeof(cmd), GFP_KERNEL);
         |                 ^
>> drivers/nvmem/qnap-mcu-eeprom.c:28:8: error: incompatible integer to pointer conversion assigning to 'u8 *' (aka 'unsigned char *') from 'int' [-Wint-conversion]
      28 |         reply = kzalloc(bytes + sizeof(cmd), GFP_KERNEL);
         |               ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/nvmem/qnap-mcu-eeprom.c:45:2: error: call to undeclared function 'kfree'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      45 |         kfree(reply);
         |         ^
   3 errors generated.


vim +/kzalloc +28 drivers/nvmem/qnap-mcu-eeprom.c

    20	
    21	static int qnap_mcu_eeprom_read_block(struct qnap_mcu *mcu, unsigned int offset,
    22					      void *val, size_t bytes)
    23	{
    24		const u8 cmd[] = { 0xf7, 0xa1, offset, bytes };
    25		u8 *reply;
    26		int ret = 0;
    27	
  > 28		reply = kzalloc(bytes + sizeof(cmd), GFP_KERNEL);
    29		if (!reply)
    30			return -ENOMEM;
    31	
    32		ret = qnap_mcu_exec(mcu, cmd, sizeof(cmd), reply, bytes + sizeof(cmd));
    33		if (ret)
    34			goto out;
    35	
    36		/* First bytes must mirror the sent command */
    37		if (memcmp(cmd, reply, sizeof(cmd))) {
    38			ret = -EIO;
    39			goto out;
    40		}
    41	
    42		memcpy(val, reply + sizeof(cmd), bytes);
    43	
    44	out:
  > 45		kfree(reply);
    46		return ret;
    47	}
    48	

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