Re: [PATCH v1 4/5] platform/x86: ayaneo-ec: Add controller power and modules attributes

[kernel test robot]

Hi Antheas,

kernel test robot noticed the following build warnings:

[auto build test WARNING on c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9]

url:    https://github.com/intel-lab-lkp/linux/commits/Antheas-Kapenekakis/platform-x86-ayaneo-ec-Add-Ayaneo-Embedded-Controller-platform-driver/20250821-002525
base:   c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9
patch link:    https://lore.kernel.org/r/20250820160628.99678-5-lkml%40antheas.dev
patch subject: [PATCH v1 4/5] platform/x86: ayaneo-ec: Add controller power and modules attributes
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20250821/202508211640.8MtPueLL-lkp@xxxxxxxxx/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250821/202508211640.8MtPueLL-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202508211640.8MtPueLL-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

>> drivers/platform/x86/ayaneo-ec.c:395:12: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
     395 |                 else if (sysfs_streq(buf, "off"))
         |                          ^~~~~~~~~~~~~~~~~~~~~~~
   drivers/platform/x86/ayaneo-ec.c:397:7: note: uninitialized use occurs here
     397 |                 if (ret)
         |                     ^~~
   drivers/platform/x86/ayaneo-ec.c:395:8: note: remove the 'if' if its condition is always true
     395 |                 else if (sysfs_streq(buf, "off"))
         |                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
     396 |                         ret = ec_write(AYANEO_POWER_REG, AYANEO_POWER_OFF);
   drivers/platform/x86/ayaneo-ec.c:389:9: note: initialize the variable 'ret' to silence this warning
     389 |         int ret;
         |                ^
         |                 = 0
   1 warning generated.


vim +395 drivers/platform/x86/ayaneo-ec.c

   382	
   383	static ssize_t current_value_store(struct kobject *kobj,
   384					   struct kobj_attribute *attr, const char *buf,
   385					   size_t count)
   386	{
   387		struct ayaneo_fw_attr *fw_attr =
   388			container_of(attr, struct ayaneo_fw_attr, current_value);
   389		int ret;
   390	
   391		switch (fw_attr->fw_attr_id) {
   392		case AYANEO_ATTR_CONTROLLER_POWER:
   393			if (sysfs_streq(buf, "on"))
   394				ret = ec_write(AYANEO_POWER_REG, AYANEO_POWER_ON);
 > 395			else if (sysfs_streq(buf, "off"))
   396				ret = ec_write(AYANEO_POWER_REG, AYANEO_POWER_OFF);
   397			if (ret)
   398				return ret;
   399			return count;
   400		case AYANEO_ATTR_CONTROLLER_MODULES:
   401			return -EINVAL;
   402		}
   403		return -EINVAL;
   404	}
   405	

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