Hello rezhu,
The patch c81726252ec9: "drm/amd/powerplay: add smu support for ellesmere/baffin" from Nov 10, 2015, leads to the following static checker warning:
drivers/gpu/drm/amd/amdgpu/../powerplay/smumgr/polaris10_smumgr.c:978 polaris10_smum_init() warn: returning -1 instead of -ENOMEM is sloppy
drivers/gpu/drm/amd/amdgpu/../powerplay/smumgr/polaris10_smumgr.c 971 int polaris10_smum_init(struct pp_smumgr *smumgr) 972 { 973 struct polaris10_smumgr *polaris10_smu = NULL; ^^^^^^^^^^^^^^^^^^^^ Please remove this. GCC has a tool for warning about uninitialized variables. If we just turn it off by initializing it to a bogus value then it can let bugs go undetected.
974 975 polaris10_smu = kzalloc(sizeof(struct polaris10_smumgr), GFP_KERNEL); 976 977 if (polaris10_smu == NULL) 978 return -1;
return -ENOMEM;
979 980 smumgr->backend = polaris10_smu; 981 smumgr->smumgr_funcs = &ellsemere_smu_funcs; 982 983 return 0; 984 }
regards, dan carpenter