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drm/amdgpu: fix check in amdgpu_hmm_invalidate_gfx

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For a short moment during alloc/free the userptr BO is not part of his VM,
so bo->vm_bo can be NULL.

Keep a reference to the VM root PD as parent of the userptr BO so that
we can always use that to wait for all submissions of the VM instead of
only the one involving the userptr BO.

Signed-off-by: Christian König <christian.koenig@amd.com>
Fixes: 91250893cb ("drm/amdgpu: fix waiting for all submissions for userptrs")
Closes: https://gitlab.freedesktop.org/drm/amd/-/work_items/5399
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 631849ff5d603841e74f19f4a5e30fe1f7d7cf30)
Cc: stable@vger.kernel.org
This commit is contained in:
Christian König 2026-06-24 16:00:41 +02:00 committed by Alex Deucher
parent efcedeecec
commit 52f650963d
2 changed files with 2 additions and 2 deletions
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1
drivers/gpu/drm/amd/amdgpu/amdgpu_gem.c
View File

@ -535,6 +535,7 @@ int amdgpu_gem_userptr_ioctl(struct drm_device *dev, void *data,
bo = gem_to_amdgpu_bo(gobj);
bo->preferred_domains = AMDGPU_GEM_DOMAIN_GTT;
bo->allowed_domains = AMDGPU_GEM_DOMAIN_GTT;
bo->parent = amdgpu_bo_ref(fpriv->vm.root.bo);
r = amdgpu_ttm_tt_set_userptr(&bo->tbo, args->addr, args->flags);
if (r)
goto release_object;

3
drivers/gpu/drm/amd/amdgpu/amdgpu_hmm.c
View File

@ -67,7 +67,6 @@ static bool amdgpu_hmm_invalidate_gfx(struct mmu_interval_notifier *mni,
{
struct amdgpu_bo *bo = container_of(mni, struct amdgpu_bo, notifier);
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
struct amdgpu_bo *vm_root = bo->vm_bo->vm->root.bo;
long r;
if (!mmu_notifier_range_blockable(range))
@ -78,7 +77,7 @@ static bool amdgpu_hmm_invalidate_gfx(struct mmu_interval_notifier *mni,
mmu_interval_set_seq(mni, cur_seq);
amdgpu_vm_bo_invalidate(bo, false);
r = dma_resv_wait_timeout(vm_root->tbo.base.resv,
r = dma_resv_wait_timeout(bo->parent->tbo.base.resv,
DMA_RESV_USAGE_BOOKKEEP, false,
MAX_SCHEDULE_TIMEOUT);
mutex_unlock(&adev->notifier_lock);