From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:395 dc_stream_set_cursor_position() warn: variable dereferenced before check 'stream' (see line 392)
Date: Thu, 25 Aug 2022 15:12:33 +0800 [thread overview]
Message-ID: <202208251541.ZM8oLNUg-lkp@intel.com> (raw)
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BCC: lkp(a)intel.com
CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Alvin Lee <Alvin.Lee2@amd.com>
CC: Alex Deucher <alexander.deucher@amd.com>
CC: Samson Tam <Samson.Tam@amd.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: c40e8341e3b3bb27e3a65b06b5b454626234c4f0
commit: a141d2083b462505727e14d98db5fc3cd43d59c6 drm/amd/display: Add debug option for exiting idle optimizations on cursor updates
date: 2 months ago
:::::: branch date: 28 hours ago
:::::: commit date: 2 months ago
config: microblaze-randconfig-m041-20220824 (https://download.01.org/0day-ci/archive/20220825/202208251541.ZM8oLNUg-lkp(a)intel.com/config)
compiler: microblaze-linux-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
smatch warnings:
drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:395 dc_stream_set_cursor_position() warn: variable dereferenced before check 'stream' (see line 392)
vim +/stream +395 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c
ab2541b6739508 Aric Cyr 2016-12-29 387
ab2541b6739508 Aric Cyr 2016-12-29 388 bool dc_stream_set_cursor_position(
0971c40e180696 Harry Wentland 2017-07-27 389 struct dc_stream_state *stream,
beb16b6a0f921f Dmytro Laktyushkin 2017-04-21 390 const struct dc_cursor_position *position)
ab2541b6739508 Aric Cyr 2016-12-29 391 {
a141d2083b4625 Alvin Lee 2022-06-03 @392 struct dc *dc = stream->ctx->dc;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 393 bool reset_idle_optimizations = false;
ab2541b6739508 Aric Cyr 2016-12-29 394
4fa086b9b66408 Leo (Sunpeng Li 2017-07-25 @395) if (NULL == stream) {
ab2541b6739508 Aric Cyr 2016-12-29 396 dm_error("DC: dc_stream is NULL!\n");
ab2541b6739508 Aric Cyr 2016-12-29 397 return false;
ab2541b6739508 Aric Cyr 2016-12-29 398 }
ab2541b6739508 Aric Cyr 2016-12-29 399
ab2541b6739508 Aric Cyr 2016-12-29 400 if (NULL == position) {
ab2541b6739508 Aric Cyr 2016-12-29 401 dm_error("DC: cursor position is NULL!\n");
ab2541b6739508 Aric Cyr 2016-12-29 402 return false;
ab2541b6739508 Aric Cyr 2016-12-29 403 }
ab2541b6739508 Aric Cyr 2016-12-29 404
2b77dcc5e5aa38 Anthony Koo 2019-11-05 405 dc = stream->ctx->dc;
bae1f0b8a5b189 Nicholas Kazlauskas 2021-05-19 406 dc_z10_restore(dc);
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 407
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 408 /* disable idle optimizations if enabling cursor */
a141d2083b4625 Alvin Lee 2022-06-03 409 if (dc->idle_optimizations_allowed && (!stream->cursor_position.enable || dc->debug.exit_idle_opt_for_cursor_updates)
a141d2083b4625 Alvin Lee 2022-06-03 410 && position->enable) {
4b675aad969507 Joshua Aberback 2020-08-31 411 dc_allow_idle_optimizations(dc, false);
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 412 reset_idle_optimizations = true;
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 413 }
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 414
33fd17d9125c00 Eric Yang 2018-01-18 415 stream->cursor_position = *position;
ab2541b6739508 Aric Cyr 2016-12-29 416
4fd771ea441ed9 Roy Chan 2021-07-19 417 program_cursor_position(dc, stream, position);
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 418 /* re-enable idle optimizations if necessary */
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 419 if (reset_idle_optimizations)
4b675aad969507 Joshua Aberback 2020-08-31 420 dc_allow_idle_optimizations(dc, true);
4d55b0dd1cdd85 Bhawanpreet Lakha 2020-05-21 421
beb16b6a0f921f Dmytro Laktyushkin 2017-04-21 422 return true;
ab2541b6739508 Aric Cyr 2016-12-29 423 }
ab2541b6739508 Aric Cyr 2016-12-29 424
:::::: The code at line 395 was first introduced by commit
:::::: 4fa086b9b6640818c053c79d4d7104790ba76cb7 drm/amd/display: Roll core_stream into dc_stream
:::::: TO: Leo (Sunpeng) Li <sunpeng.li@amd.com>
:::::: CC: Alex Deucher <alexander.deucher@amd.com>
--
0-DAY CI Kernel Test Service
https://01.org/lkp
next reply other threads:[~2022-08-25 7:12 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-25 7:12 kernel test robot [this message]
-- strict thread matches above, loose matches on Subject: below --
2022-10-27 7:36 drivers/gpu/drm/amd/amdgpu/../display/dc/core/dc_stream.c:395 dc_stream_set_cursor_position() warn: variable dereferenced before check 'stream' (see line 392) Dan Carpenter
2022-08-19 3:30 kernel test robot
2022-08-18 11:05 Dan Carpenter
2022-08-17 9:15 ` kernel test robot
2022-08-18 11:05 ` Dan Carpenter
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