From: kernel test robot <lkp@intel.com>
To: kbuild@lists.01.org
Subject: drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c:1069:6: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour
Date: Sun, 13 Dec 2020 14:46:15 +0800 [thread overview]
Message-ID: <202012131411.dkYlTyM8-lkp@intel.com> (raw)
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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Likun Gao <Likun.Gao@amd.com>
CC: Alex Deucher <alexander.deucher@amd.com>
CC: Hawking Zhang <Hawking.Zhang@amd.com>
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 6bff9bb8a292668e7da3e740394b061e5201f683
commit: 157e72e831cb8f323108b5df6d0b148aef9507fb drm/amdgpu: add sdma ip block for sienna_cichlid (v5)
date: 6 months ago
:::::: branch date: 10 hours ago
:::::: commit date: 6 months ago
compiler: alpha-linux-gcc (GCC) 9.3.0
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
cppcheck possible warnings: (new ones prefixed by >>, may not real problems)
>> drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c:1069:6: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned]
SDMA_PKT_POLL_REGMEM_HEADER_MEM_POLL(1));
^
vim +1069 drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c
157e72e831cb8f3 Likun Gao 2019-06-17 1051
157e72e831cb8f3 Likun Gao 2019-06-17 1052
157e72e831cb8f3 Likun Gao 2019-06-17 1053 /**
157e72e831cb8f3 Likun Gao 2019-06-17 1054 * sdma_v5_2_ring_emit_pipeline_sync - sync the pipeline
157e72e831cb8f3 Likun Gao 2019-06-17 1055 *
157e72e831cb8f3 Likun Gao 2019-06-17 1056 * @ring: amdgpu_ring pointer
157e72e831cb8f3 Likun Gao 2019-06-17 1057 *
157e72e831cb8f3 Likun Gao 2019-06-17 1058 * Make sure all previous operations are completed (CIK).
157e72e831cb8f3 Likun Gao 2019-06-17 1059 */
157e72e831cb8f3 Likun Gao 2019-06-17 1060 static void sdma_v5_2_ring_emit_pipeline_sync(struct amdgpu_ring *ring)
157e72e831cb8f3 Likun Gao 2019-06-17 1061 {
157e72e831cb8f3 Likun Gao 2019-06-17 1062 uint32_t seq = ring->fence_drv.sync_seq;
157e72e831cb8f3 Likun Gao 2019-06-17 1063 uint64_t addr = ring->fence_drv.gpu_addr;
157e72e831cb8f3 Likun Gao 2019-06-17 1064
157e72e831cb8f3 Likun Gao 2019-06-17 1065 /* wait for idle */
157e72e831cb8f3 Likun Gao 2019-06-17 1066 amdgpu_ring_write(ring, SDMA_PKT_HEADER_OP(SDMA_OP_POLL_REGMEM) |
157e72e831cb8f3 Likun Gao 2019-06-17 1067 SDMA_PKT_POLL_REGMEM_HEADER_HDP_FLUSH(0) |
157e72e831cb8f3 Likun Gao 2019-06-17 1068 SDMA_PKT_POLL_REGMEM_HEADER_FUNC(3) | /* equal */
157e72e831cb8f3 Likun Gao 2019-06-17 @1069 SDMA_PKT_POLL_REGMEM_HEADER_MEM_POLL(1));
157e72e831cb8f3 Likun Gao 2019-06-17 1070 amdgpu_ring_write(ring, addr & 0xfffffffc);
157e72e831cb8f3 Likun Gao 2019-06-17 1071 amdgpu_ring_write(ring, upper_32_bits(addr) & 0xffffffff);
157e72e831cb8f3 Likun Gao 2019-06-17 1072 amdgpu_ring_write(ring, seq); /* reference */
157e72e831cb8f3 Likun Gao 2019-06-17 1073 amdgpu_ring_write(ring, 0xffffffff); /* mask */
157e72e831cb8f3 Likun Gao 2019-06-17 1074 amdgpu_ring_write(ring, SDMA_PKT_POLL_REGMEM_DW5_RETRY_COUNT(0xfff) |
157e72e831cb8f3 Likun Gao 2019-06-17 1075 SDMA_PKT_POLL_REGMEM_DW5_INTERVAL(4)); /* retry count, poll interval */
157e72e831cb8f3 Likun Gao 2019-06-17 1076 }
157e72e831cb8f3 Likun Gao 2019-06-17 1077
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
next reply other threads:[~2020-12-13 6:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-13 6:46 kernel test robot [this message]
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2020-10-27 12:03 drivers/gpu/drm/amd/amdgpu/sdma_v5_2.c:1069:6: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour kernel test robot
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