tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: d1d2220c7f39d0fca302c4ba6cca4ede01660a2b commit: e8cb7a4dd9dffff72172d94dcea4577219426106 [7429/10763] drm/amd/display: Flip pending check timeout due to disabled hubp config: i386-randconfig-m021-20200924 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> Reported-by: Dan Carpenter <dan.carpen...@oracle.com> smatch warnings: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hubp.c:752 hubp1_is_flip_pending() error: we previously assumed 'hubp' could be null (see line 737) drivers/gpu/drm/amd/amdgpu/../display/dc/dcn20/dcn20_hubp.c:926 hubp2_is_flip_pending() error: we previously assumed 'hubp' could be null (see line 911) # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e8cb7a4dd9dffff72172d94dcea4577219426106 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout e8cb7a4dd9dffff72172d94dcea4577219426106 vim +/hubp +752 drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_hubp.c 8feabd03d34e45 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yue Hin Lau 2017-10-02 731 bool hubp1_is_flip_pending(struct hubp *hubp) 70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland 2017-05-08 732 { db3bc05034a4b0 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Dmytro Laktyushkin 2017-06-28 733 uint32_t flip_pending = 0; 8feabd03d34e45 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yue Hin Lau 2017-10-02 734 struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp); ^^^^^^^^^^^^^^^^^^^^^^^^^^ I'm not sure how "hubp1" is used, but presumably if "hubp" is NULL then we are toasted. 2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun 2017-06-06 735 struct dc_plane_address earliest_inuse_address; 70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland 2017-05-08 736 e8cb7a4dd9dfff drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c Aric Cyr 2020-08-21 @737 if (hubp && hubp->power_gated) ^^^^ The patch adds a check for NULL e8cb7a4dd9dfff drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c Aric Cyr 2020-08-21 738 return false; e8cb7a4dd9dfff drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c Aric Cyr 2020-08-21 739 70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland 2017-05-08 740 REG_GET(DCSURF_FLIP_CONTROL, db3bc05034a4b0 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Dmytro Laktyushkin 2017-06-28 741 SURFACE_FLIP_PENDING, &flip_pending); 70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland 2017-05-08 742 2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun 2017-06-06 743 REG_GET(DCSURF_SURFACE_EARLIEST_INUSE, 2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun 2017-06-06 744 SURFACE_EARLIEST_INUSE_ADDRESS, &earliest_inuse_address.grph.addr.low_part); 2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun 2017-06-06 745 2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun 2017-06-06 746 REG_GET(DCSURF_SURFACE_EARLIEST_INUSE_HIGH, 2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun 2017-06-06 747 SURFACE_EARLIEST_INUSE_ADDRESS_HIGH, &earliest_inuse_address.grph.addr.high_part); 2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun 2017-06-06 748 db3bc05034a4b0 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Dmytro Laktyushkin 2017-06-28 749 if (flip_pending) 70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland 2017-05-08 750 return true; 70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland 2017-05-08 751 8feabd03d34e45 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yue Hin Lau 2017-10-02 @752 if (earliest_inuse_address.grph.addr.quad_part != hubp->request_address.grph.addr.quad_part) ^^^^^^ But the old code doesn't check for NULL. Just delete the check? 2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun 2017-06-06 753 return true; 2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun 2017-06-06 754 70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland 2017-05-08 755 return false; 70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland 2017-05-08 756 } --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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