[radeon-alex:amd-staging-drm-next 1152/1167] drivers/gpu/drm/amd/amdgpu/../powerplay/amd_powerplay.c:175:30: warning: 'hwmgr' may be used uninitialized in this function

[kbuild test robot]

tree:   git://people.freedesktop.org/~agd5f/linux.git amd-staging-drm-next
head:   99f6288635ceb793ea79c787d83ee64a95b46cd4
commit: 6a1f70848ca224e9fa74dfc72c05a0f9c8711b98 [1152/1167] drm/amd/powerplay: refine code in amd_powerplay.c
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 6a1f70848ca224e9fa74dfc72c05a0f9c8711b98
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/../powerplay/amd_powerplay.c: In function 'pp_hw_init':
>> drivers/gpu/drm/amd/amdgpu/../powerplay/amd_powerplay.c:175:30: warning: 'hwmgr' may be used uninitialized in this function [-Wmaybe-uninitialized]
     cgs_notify_dpm_enabled(hwmgr->device, false);
                                 ^~

vim +/hwmgr +175 drivers/gpu/drm/amd/amdgpu/../powerplay/amd_powerplay.c

   145	
   146	static int pp_hw_init(void *handle)
   147	{
   148		int ret = 0;
   149		struct pp_instance *pp_handle = (struct pp_instance *)handle;
   150		struct pp_hwmgr *hwmgr;
   151	
   152		ret = pp_check(pp_handle);
   153	
   154		if (ret >= 0) {
   155			hwmgr = pp_handle->hwmgr;
   156	
   157			if (hwmgr->smumgr_funcs->start_smu == NULL)
   158				return -EINVAL;
   159	
   160			if(hwmgr->smumgr_funcs->start_smu(pp_handle->hwmgr)) {
   161				pr_err("smc start failed\n");
   162				hwmgr->smumgr_funcs->smu_fini(pp_handle->hwmgr);
   163				return -EINVAL;;
   164			}
   165			if (ret == PP_DPM_DISABLED)
   166				goto exit;
   167		}
   168	
   169		ret = hwmgr_hw_init(pp_handle);
   170		if (ret)
   171			goto exit;
   172		return 0;
   173	exit:
   174		pp_handle->pm_en = 0;
 > 175		cgs_notify_dpm_enabled(hwmgr->device, false);
   176		return 0;
   177	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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