[openeuler:openEuler-1.0-LTS 1365/1365] drivers/acpi/cppc_acpi.c:614:3-8: WARNING: NULL check before some freeing functions is not needed. - Kernel

15 Feb 2025

      tree:   https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head:   6a6cc2b6b95dc80ae01221670e21a8059229a023
commit: b8815fbbe89b0d15fa3296c3e57d2197a92f5bc0 [1365/1365] ACPI: CPPC: Fix cppc_cpufreq_init failed in CPU Hotplug situation
config: x86_64-randconfig-102-20250103 (https://download.01.org/0day-ci/archive/20250215/202502152003.YgfLX405-lkp@i...)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)

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/202502152003.YgfLX405-lkp@intel.com/

cocci warnings: (new ones prefixed by >>)
...
...
drivers/acpi/cppc_acpi.c:614:3-8: WARNING: NULL check before some freeing functions is not needed.
vim +614 drivers/acpi/cppc_acpi.c

   576	
   577	int acpi_get_psd_map(struct cppc_cpudata **all_cpu_data)
   578	{
   579		struct cpc_desc **cpc_pptr, *cpc_ptr;
   580		int parsed_core_num = 0;
   581		int i, ret;
   582	
   583		cpc_pptr = kcalloc(num_possible_cpus(), sizeof(void *), GFP_KERNEL);
   584		if (!cpc_pptr)
   585			return -ENOMEM;
   586		for_each_possible_cpu(i) {
   587			cpc_pptr[i] = kzalloc(sizeof(struct cpc_desc), GFP_KERNEL);
   588			if (!cpc_pptr[i]) {
   589				ret = -ENOMEM;
   590				goto out;
   591			}
   592		}
   593	
   594		/*
   595		 * We can not use acpi_get_devices() to walk the processor devices
   596		 * because some processor device is not present.
   597		 */
   598		ret = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
   599					  ACPI_UINT32_MAX, acpi_parse_cpc, NULL,
   600					  cpc_pptr, (void **)&parsed_core_num);
   601		if (ret)
   602			goto out;
   603		if (parsed_core_num != num_possible_cpus()) {
   604			ret = -EINVAL;
   605			goto out;
   606		}
   607	
   608		ret = __acpi_get_psd_map(all_cpu_data, cpc_pptr);
   609	
   610	out:
   611		for_each_possible_cpu(i) {
   612			cpc_ptr = cpc_pptr[i];
   613			if (cpc_ptr)
...
614				kfree(cpc_ptr);
   615		}
   616		kfree(cpc_pptr);
   617	
   618		return ret;
   619	}
   620	EXPORT_SYMBOL_GPL(acpi_get_psd_map);
   621
-- 
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https://github.com/intel/lkp-tests/wiki