[chanwoo:devfreq-testing 5/5] drivers/devfreq/governor_passive.c:409:2: error: use of undeclared identifier 'ret'

[chanwoo:devfreq-testing 5/5] drivers/devfreq/governor_passive.c:409:2: error: use of undeclared identifier 'ret'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git devfreq-testing
head:   edb11683479cd9e51010f571ae4011ae01e88ee5
commit: edb11683479cd9e51010f571ae4011ae01e88ee5 [5/5] PM / devfreq: passive: Update frequency when start governor
config: arm64-randconfig-r034-20220509 (https://download.01.org/0day-ci/archive/20220509/202205092158.pfjjAl5S-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a385645b470e2d3a1534aae618ea56b31177639f)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git/commit/?id=edb11683479cd9e51010f571ae4011ae01e88ee5
        git remote add chanwoo https://git.kernel.org/pub/scm/linux/kernel/git/chanwoo/linux.git
        git fetch --no-tags chanwoo devfreq-testing
        git checkout edb11683479cd9e51010f571ae4011ae01e88ee5
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/devfreq/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> drivers/devfreq/governor_passive.c:409:2: error: use of undeclared identifier 'ret'
           ret = devfreq_update_target(devfreq, parent->previous_freq);
           ^
   drivers/devfreq/governor_passive.c:410:6: error: use of undeclared identifier 'ret'
           if (ret < 0)
               ^
   drivers/devfreq/governor_passive.c:424:18: warning: unused variable 'parent' [-Wunused-variable]
           struct devfreq *parent = (struct devfreq *)p_data->parent;
                           ^
   1 warning and 2 errors generated.


vim +/ret +409 drivers/devfreq/governor_passive.c

   387	
   388	static int devfreq_passive_register_notifier(struct devfreq *devfreq)
   389	{
   390		struct devfreq_passive_data *p_data
   391				= (struct devfreq_passive_data *)devfreq->data;
   392		struct devfreq *parent = (struct devfreq *)p_data->parent;
   393		struct notifier_block *nb = &p_data->nb;
   394	
   395		if (!parent)
   396			return -EPROBE_DEFER;
   397	
   398		/*
   399		 * If the parent device changes the their frequency before
   400		 * registering the passive device, the passive device cannot
   401		 * receive the notification from parent device and then the
   402		 * passive device cannot be able to set the proper frequency
   403		 * according to the frequency of parent device.
   404		 *
   405		 * When start the passive governor, update the frequency
   406		 * according to the frequency of parent device.
   407		 */
   408		mutex_lock(&devfreq->lock);
 > 409		ret = devfreq_update_target(devfreq, parent->previous_freq);
   410		if (ret < 0)
   411			dev_warn(&devfreq->dev,
   412			"failed to update devfreq using passive governor\n");
   413		mutex_unlock(&devfreq->lock);
   414	
   415		nb->notifier_call = devfreq_passive_notifier_call;
   416		return devfreq_register_notifier(parent, nb, DEVFREQ_TRANSITION_NOTIFIER);
   417	}
   418	

-- 
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