[linux-next:master 5380/8209] drivers/gpu/drm/amd/amdgpu/../display/dc/hubp/dcn10/dcn10_hubp.c:775 hubp1_is_flip_pending() error: we previously assumed 'hubp' could be null (see line 760)

BCC: [email protected]
CC: [email protected]
TO: Gleb Markov <[email protected]>
CC: Alex Deucher <[email protected]>
CC: George Zhang <[email protected]>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   290aaf24a551d5a0dce037e3fab30820f9113a10
commit: b736792e5bd4a62f24e8d1e310bf4a75bfbeaaaa [5380/8209] drm/amd/display: Remove unused-but-set variable hubp from
:::::: branch date: 23 hours ago
:::::: commit date: 7 days ago
config: x86_64-randconfig-161-20260721 (https://download.01.org/0day-ci/archive/20260722/[email protected]/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
smatch: v0.5.0-9187-g5189e3fb

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Reported-by: Dan Carpenter <[email protected]>
| Closes: https://lore.kernel.org/r/[email protected]/

smatch warnings:
drivers/gpu/drm/amd/amdgpu/../display/dc/hubp/dcn10/dcn10_hubp.c:775 hubp1_is_flip_pending() error: we previously assumed 'hubp' could be null (see line 760)

vim +/hubp +775 drivers/gpu/drm/amd/amdgpu/../display/dc/hubp/dcn10/dcn10_hubp.c

1a1adf172f6a97 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c      Dmytro Laktyushkin 2018-10-31  753  
8feabd03d34e45 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yue Hin Lau        2017-10-02  754  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  755  {
db3bc05034a4b0 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Dmytro Laktyushkin 2017-06-28  756  	uint32_t flip_pending = 0;
8feabd03d34e45 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yue Hin Lau        2017-10-02  757  	struct dcn10_hubp *hubp1 = TO_DCN10_HUBP(hubp);
2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun      2017-06-06  758  	struct dc_plane_address earliest_inuse_address;
70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland     2017-05-08  759  
e8cb7a4dd9dfff drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c      Aric Cyr           2020-08-21 @760  	if (hubp && hubp->power_gated)
e8cb7a4dd9dfff drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c      Aric Cyr           2020-08-21  761  		return false;
e8cb7a4dd9dfff drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubp.c      Aric Cyr           2020-08-21  762  
70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland     2017-05-08  763  	REG_GET(DCSURF_FLIP_CONTROL,
db3bc05034a4b0 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Dmytro Laktyushkin 2017-06-28  764  			SURFACE_FLIP_PENDING, &flip_pending);
70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland     2017-05-08  765  
2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun      2017-06-06  766  	REG_GET(DCSURF_SURFACE_EARLIEST_INUSE,
2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun      2017-06-06  767  			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  768  
2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun      2017-06-06  769  	REG_GET(DCSURF_SURFACE_EARLIEST_INUSE_HIGH,
2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun      2017-06-06  770  			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  771  
db3bc05034a4b0 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Dmytro Laktyushkin 2017-06-28  772  	if (flip_pending)
70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland     2017-05-08  773  		return true;
70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland     2017-05-08  774  
b736792e5bd4a6 drivers/gpu/drm/amd/display/dc/hubp/dcn10/dcn10_hubp.c Gleb Markov        2026-06-29 @775  	if (earliest_inuse_address.grph.addr.quad_part != hubp->request_address.grph.addr.quad_part)
2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun      2017-06-06  776  		return true;
2f1e8efd10315c drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Yongqiang Sun      2017-06-06  777  
70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland     2017-05-08  778  	return false;
70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland     2017-05-08  779  }
70ccab604049bb drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mem_input.c Harry Wentland     2017-05-08  780  

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