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
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