drivers/cpufreq/armada-8k-cpufreq.c:53:40: sparse: sparse: Using plain integer as NULL pointer

drivers/cpufreq/armada-8k-cpufreq.c:53:40: sparse: sparse: Using plain integer as NULL pointer

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   5bd7ef53ffe5ca580e93e74eb8c81ed191ddc4bd
commit: f525a670533d961fd72ab748e3aac002d7b3d1b9 cpufreq: ap806: add cpufreq driver for Armada 8K
date:   4 years, 10 months ago
config: arm-randconfig-r131-20231117 (https://download.01.org/0day-ci/archive/20231214/202312141651.lCAXGAZ2-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231214/202312141651.lCAXGAZ2-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/202312141651.lCAXGAZ2-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/cpufreq/armada-8k-cpufreq.c:53:40: sparse: sparse: Using plain integer as NULL pointer
   drivers/cpufreq/armada-8k-cpufreq.c:155:40: sparse: sparse: Using plain integer as NULL pointer

vim +53 drivers/cpufreq/armada-8k-cpufreq.c

    36	
    37	/* If the CPUs share the same clock, then they are in the same cluster. */
    38	static void __init armada_8k_get_sharing_cpus(struct clk *cur_clk,
    39						      struct cpumask *cpumask)
    40	{
    41		int cpu;
    42	
    43		for_each_possible_cpu(cpu) {
    44			struct device *cpu_dev;
    45			struct clk *clk;
    46	
    47			cpu_dev = get_cpu_device(cpu);
    48			if (!cpu_dev) {
    49				pr_warn("Failed to get cpu%d device\n", cpu);
    50				continue;
    51			}
    52	
  > 53			clk = clk_get(cpu_dev, 0);
    54			if (IS_ERR(clk)) {
    55				pr_warn("Cannot get clock for CPU %d\n", cpu);
    56			} else {
    57				if (clk_is_match(clk, cur_clk))
    58					cpumask_set_cpu(cpu, cpumask);
    59	
    60				clk_put(clk);
    61			}
    62		}
    63	}
    64	

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