RE: drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c:804 amdgpu_gmc_flush_gpu_tlb_pasid() warn: inconsistent returns '&adev->reset_domain->sem'.
From: Liang, Prike
Date: Sun Jan 18 2026 - 21:05:53 EST
[Public]
Thank you for catching up, we have an inflight fix update for this lock issue.
Regards,
Prike
> -----Original Message-----
> From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> Sent: Monday, January 19, 2026 3:25 AM
> To: oe-kbuild@xxxxxxxxxxxxxxx; Liang, Prike <Prike.Liang@xxxxxxx>
> Cc: lkp@xxxxxxxxx; oe-kbuild-all@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> Deucher, Alexander <Alexander.Deucher@xxxxxxx>; Koenig, Christian
> <Christian.Koenig@xxxxxxx>
> Subject: drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c:804
> amdgpu_gmc_flush_gpu_tlb_pasid() warn: inconsistent returns '&adev-
> >reset_domain->sem'.
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head: e84d960149e71e8d5e4db69775ce31305898ed0c
> commit: 0bea77b13b7649710108e6b67937ab4c7f8a9363 drm/amdgpu: validate the
> flush_gpu_tlb_pasid()
> config: powerpc64-randconfig-r071-20260118 (https://download.01.org/0day-
> ci/archive/20260119/202601190121.z9C0uml5-lkp@xxxxxxxxx/config)
> compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project
> 9b8addffa70cee5b2acc5454712d9cf78ce45710)
> smatch version: v0.5.0-8985-g2614ff1a
>
> 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 <lkp@xxxxxxxxx>
> | Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> | Closes: https://lore.kernel.org/r/202601190121.z9C0uml5-lkp@xxxxxxxxx/
>
> smatch warnings:
> drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c:804
> amdgpu_gmc_flush_gpu_tlb_pasid() warn: inconsistent returns '&adev-
> >reset_domain->sem'.
>
> vim +804 drivers/gpu/drm/amd/amdgpu/amdgpu_gmc.c
>
> e7b90e99fa8fd6 Christian König 2023-09-04 717 int
> amdgpu_gmc_flush_gpu_tlb_pasid(struct amdgpu_device *adev, uint16_t pasid,
> e7b90e99fa8fd6 Christian König 2023-09-04 718
> uint32_t flush_type, bool all_hub,
> e7b90e99fa8fd6 Christian König 2023-09-04 719
> uint32_t inst)
> e7b90e99fa8fd6 Christian König 2023-09-04 720 {
> e7b90e99fa8fd6 Christian König 2023-09-04 721 struct amdgpu_ring *ring =
> &adev->gfx.kiq[inst].ring;
> e7b90e99fa8fd6 Christian König 2023-09-04 722 struct amdgpu_kiq *kiq =
> &adev->gfx.kiq[inst];
> e7b90e99fa8fd6 Christian König 2023-09-04 723 unsigned int ndw;
> 3666ed821832f4 Jay Cornwall 2025-03-21 724 int r, cnt = 0;
> e7b90e99fa8fd6 Christian König 2023-09-04 725 uint32_t seq;
> e7b90e99fa8fd6 Christian König 2023-09-04 726
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 727 /*
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 728 * A GPU reset should flush all
> TLBs anyway, so no need to do
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 729 * this while one is ongoing.
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 730 */
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 731 if (!down_read_trylock(&adev-
> >reset_domain->sem))
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 732 return 0;
> 08abccc9a7a7ff Christian König 2023-09-04 733
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 734 if (!adev-
> >gmc.flush_pasid_uses_kiq || !ring->sched.ready) {
> 0bea77b13b7649 Prike Liang 2026-01-06 735
> 0bea77b13b7649 Prike Liang 2026-01-06 736 if (!adev-
> >gmc.gmc_funcs->flush_gpu_tlb_pasid)
> 0bea77b13b7649 Prike Liang 2026-01-06 737 return 0;
>
> need to call up_read(&adev->reset_domain->sem) before returning.
>
> 0bea77b13b7649 Prike Liang 2026-01-06 738
> 08abccc9a7a7ff Christian König 2023-09-04 739 if (adev-
> >gmc.flush_tlb_needs_extra_type_2)
> 08abccc9a7a7ff Christian König 2023-09-04 740 adev-
> >gmc.gmc_funcs->flush_gpu_tlb_pasid(adev, pasid,
> 08abccc9a7a7ff Christian König 2023-09-04 741
> 2, all_hub,
> 08abccc9a7a7ff Christian König 2023-09-04 742
> inst);
> 08abccc9a7a7ff Christian König 2023-09-04 743
> 08abccc9a7a7ff Christian König 2023-09-04 744 if (adev-
> >gmc.flush_tlb_needs_extra_type_0 && flush_type == 2)
> 08abccc9a7a7ff Christian König 2023-09-04 745 adev-
> >gmc.gmc_funcs->flush_gpu_tlb_pasid(adev, pasid,
> 08abccc9a7a7ff Christian König 2023-09-04 746
> 0, all_hub,
> 08abccc9a7a7ff Christian König 2023-09-04 747
> inst);
> 08abccc9a7a7ff Christian König 2023-09-04 748
> 3983c9fd2d8b5a Christian König 2023-09-04 749 adev->gmc.gmc_funcs-
> >flush_gpu_tlb_pasid(adev, pasid,
> 3983c9fd2d8b5a Christian König 2023-09-04 750
> flush_type, all_hub,
> 3983c9fd2d8b5a Christian König 2023-09-04 751
> inst);
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 752 r = 0;
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 753 } else {
> e7b90e99fa8fd6 Christian König 2023-09-04 754 /* 2 dwords flush + 8
> dwords fence */
> e7b90e99fa8fd6 Christian König 2023-09-04 755 ndw = kiq->pmf-
> >invalidate_tlbs_size + 8;
> e7b90e99fa8fd6 Christian König 2023-09-04 756
> e7b90e99fa8fd6 Christian König 2023-09-04 757 if (adev-
> >gmc.flush_tlb_needs_extra_type_2)
> e7b90e99fa8fd6 Christian König 2023-09-04 758 ndw += kiq-
> >pmf->invalidate_tlbs_size;
> e7b90e99fa8fd6 Christian König 2023-09-04 759
> e7b90e99fa8fd6 Christian König 2023-09-04 760 if (adev-
> >gmc.flush_tlb_needs_extra_type_0)
> e7b90e99fa8fd6 Christian König 2023-09-04 761 ndw += kiq-
> >pmf->invalidate_tlbs_size;
> e7b90e99fa8fd6 Christian König 2023-09-04 762
> e7b90e99fa8fd6 Christian König 2023-09-04 763 spin_lock(&adev-
> >gfx.kiq[inst].ring_lock);
> 9ff2e14cf013fa Bob Zhou 2024-06-20 764 r =
> amdgpu_ring_alloc(ring, ndw);
> 9ff2e14cf013fa Bob Zhou 2024-06-20 765 if (r) {
> 9ff2e14cf013fa Bob Zhou 2024-06-20 766
> spin_unlock(&adev->gfx.kiq[inst].ring_lock);
> 9ff2e14cf013fa Bob Zhou 2024-06-20 767 goto
> error_unlock_reset;
> 9ff2e14cf013fa Bob Zhou 2024-06-20 768 }
> e7b90e99fa8fd6 Christian König 2023-09-04 769 if (adev-
> >gmc.flush_tlb_needs_extra_type_2)
> e7b90e99fa8fd6 Christian König 2023-09-04 770 kiq->pmf-
> >kiq_invalidate_tlbs(ring, pasid, 2, all_hub);
> e7b90e99fa8fd6 Christian König 2023-09-04 771
> e7b90e99fa8fd6 Christian König 2023-09-04 772 if (flush_type == 2 &&
> adev->gmc.flush_tlb_needs_extra_type_0)
> e7b90e99fa8fd6 Christian König 2023-09-04 773 kiq->pmf-
> >kiq_invalidate_tlbs(ring, pasid, 0, all_hub);
> e7b90e99fa8fd6 Christian König 2023-09-04 774
> e7b90e99fa8fd6 Christian König 2023-09-04 775 kiq->pmf-
> >kiq_invalidate_tlbs(ring, pasid, flush_type, all_hub);
> e7b90e99fa8fd6 Christian König 2023-09-04 776 r =
> amdgpu_fence_emit_polling(ring, &seq, MAX_KIQ_REG_WAIT);
> e7b90e99fa8fd6 Christian König 2023-09-04 777 if (r) {
> e7b90e99fa8fd6 Christian König 2023-09-04 778
> amdgpu_ring_undo(ring);
> e7b90e99fa8fd6 Christian König 2023-09-04 779
> spin_unlock(&adev->gfx.kiq[inst].ring_lock);
> e7b90e99fa8fd6 Christian König 2023-09-04 780 goto
> error_unlock_reset;
> e7b90e99fa8fd6 Christian König 2023-09-04 781 }
> e7b90e99fa8fd6 Christian König 2023-09-04 782
> e7b90e99fa8fd6 Christian König 2023-09-04 783
> amdgpu_ring_commit(ring);
> e7b90e99fa8fd6 Christian König 2023-09-04 784 spin_unlock(&adev-
> >gfx.kiq[inst].ring_lock);
> 3666ed821832f4 Jay Cornwall 2025-03-21 785
> 3666ed821832f4 Jay Cornwall 2025-03-21 786 r =
> amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
> 3666ed821832f4 Jay Cornwall 2025-03-21 787
> 3666ed821832f4 Jay Cornwall 2025-03-21 788 might_sleep();
> 3666ed821832f4 Jay Cornwall 2025-03-21 789 while (r < 1 && cnt++ <
> MAX_KIQ_REG_TRY &&
> 3666ed821832f4 Jay Cornwall 2025-03-21 790
> !amdgpu_reset_pending(adev->reset_domain)) {
> 3666ed821832f4 Jay Cornwall 2025-03-21 791
> msleep(MAX_KIQ_REG_BAILOUT_INTERVAL);
> 3666ed821832f4 Jay Cornwall 2025-03-21 792 r =
> amdgpu_fence_wait_polling(ring, seq, MAX_KIQ_REG_WAIT);
> 3666ed821832f4 Jay Cornwall 2025-03-21 793 }
> 3666ed821832f4 Jay Cornwall 2025-03-21 794
> 3666ed821832f4 Jay Cornwall 2025-03-21 795 if (cnt >
> MAX_KIQ_REG_TRY) {
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 796 dev_err(adev-
> >dev, "timeout waiting for kiq fence\n");
> e7b90e99fa8fd6 Christian König 2023-09-04 797 r = -ETIME;
> 3666ed821832f4 Jay Cornwall 2025-03-21 798 } else
> 3666ed821832f4 Jay Cornwall 2025-03-21 799 r = 0;
> 9c33e5fd4fb63b Yunxiang Li 2024-05-23 800 }
> e7b90e99fa8fd6 Christian König 2023-09-04 801
> e7b90e99fa8fd6 Christian König 2023-09-04 802 error_unlock_reset:
> e7b90e99fa8fd6 Christian König 2023-09-04 803 up_read(&adev->reset_domain-
> >sem);
> e7b90e99fa8fd6 Christian König 2023-09-04 @804 return r;
> e7b90e99fa8fd6 Christian König 2023-09-04 805 }
>
> --
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