[nbd168-wireless:mt76 5/13] drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.c:64:68: sparse: sparse: Using plain integer as NULL pointer

[kernel test robot]

tree:   https://github.com/nbd168/wireless mt76
head:   bf744ed33b209f6d8de1b2a5b806c5fe38cd1e7c
commit: ab79a7d7a96f3325a120b6658ea9d8a3eaa2eb09 [5/13] mt76: mt7921: introduce ACPI SAR support
config: ia64-randconfig-s031-20220605 (https://download.01.org/0day-ci/archive/20220605/202206050617.FMBZUzPN-lkp@xxxxxxxxx/config)
compiler: ia64-linux-gcc (GCC) 11.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-18-g56afb504-dirty
        # https://github.com/nbd168/wireless/commit/ab79a7d7a96f3325a120b6658ea9d8a3eaa2eb09
        git remote add nbd168-wireless https://github.com/nbd168/wireless
        git fetch --no-tags nbd168-wireless mt76
        git checkout ab79a7d7a96f3325a120b6658ea9d8a3eaa2eb09
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/net/wireless/mediatek/mt76/mt7921/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>


sparse warnings: (new ones prefixed by >>)
>> drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.c:64:68: sparse: sparse: Using plain integer as NULL pointer

vim +64 drivers/net/wireless/mediatek/mt76/mt7921/acpi_sar.c

    59	
    60	/* MTCL : Country List Table for 6G band */
    61	static int
    62	mt7921_asar_acpi_read_mtcl(struct mt7921_dev *dev, u8 **table, u8 *version)
    63	{
  > 64		*version = (mt7921_acpi_read(dev, MT7921_ACPI_MTCL, table, 0) < 0)
    65			   ? 1 : 2;
    66		return 0;
    67	}
    68	

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