Hi Rex,
FYI, the error/warning still remains.
tree: git://people.freedesktop.org/~agd5f/linux.git amd-17.50
head: 4b295aab3256d700354748dcd64017d76065d684
commit: 9c2014d08693830897cad6bbd359d905825d8a18 [2016/2100] drm/amd/powerplay: add CI asics support to smumgr
config: i386-allyesconfig (attached as .config)
compiler: gcc-7 (Debian 7.2.0-12) 7.2.1 20171025
reproduce:
git checkout 9c2014d08693830897cad6bbd359d905825d8a18
# save the attached .config to linux build tree
make ARCH=i386
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/smumgr/ci_smc.c: In function 'ci_init_smc_table':
>> drivers/gpu/drm/amd/amdgpu/../powerplay/smumgr/ci_smc.c:579:62: warning: 'tmp' may be used uninitialized in this function [-Wmaybe-uninitialized]
smu_data->power_tune_table.FuzzyFan_PwmSetDelta = CONVERT_FROM_HOST_TO_SMC_US(tmp);
~^~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/amd/amdgpu/../powerplay/smumgr/ci_smc.c:571:11: note: 'tmp' was declared here
uint16_t tmp;
^~~
vim +/tmp +579 drivers/gpu/drm/amd/amdgpu/../powerplay/smumgr/ci_smc.c
568
569 static int ci_populate_fuzzy_fan(struct pp_hwmgr *hwmgr, uint32_t fuse_table_offset)
570 {
571 uint16_t tmp;
572 struct ci_smumgr *smu_data = (struct ci_smumgr *)(hwmgr->smumgr->backend);
573
574 if ((hwmgr->thermal_controller.advanceFanControlParameters.usFanOutputSensitivity & (1 << 15))
575 || 0 == hwmgr->thermal_controller.advanceFanControlParameters.usFanOutputSensitivity)
576 tmp = hwmgr->thermal_controller.advanceFanControlParameters.usFanOutputSensitivity
577 = hwmgr->thermal_controller.advanceFanControlParameters.usDefaultFanOutputSensitivity;
578
> 579 smu_data->power_tune_table.FuzzyFan_PwmSetDelta = CONVERT_FROM_HOST_TO_SMC_US(tmp);
580
581 return 0;
582 }
583
---
0-DAY kernel test infrastructure Open Source Technology Center
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