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drm/amdgpu: reserve root PD while releasing it
Otherwise somebody could try to evict it at the same time and try to use half torn down structures. Signed-off-by: Christian König <christian.koenig@amd.com> Reviewed-and-Tested-by: Michel Dänzer <michel.daenzer@amd.com> Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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1 changed files with 11 additions and 2 deletions
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@ -2759,8 +2759,9 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
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{
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struct amdgpu_bo_va_mapping *mapping, *tmp;
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bool prt_fini_needed = !!adev->gart.gart_funcs->set_prt;
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struct amdgpu_bo *root;
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u64 fault;
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int i;
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int i, r;
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/* Clear pending page faults from IH when the VM is destroyed */
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while (kfifo_get(&vm->faults, &fault))
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@ -2795,7 +2796,15 @@ void amdgpu_vm_fini(struct amdgpu_device *adev, struct amdgpu_vm *vm)
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amdgpu_vm_free_mapping(adev, vm, mapping, NULL);
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}
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amdgpu_vm_free_levels(&vm->root);
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root = amdgpu_bo_ref(vm->root.base.bo);
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r = amdgpu_bo_reserve(root, true);
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if (r) {
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dev_err(adev->dev, "Leaking page tables because BO reservation failed\n");
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} else {
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amdgpu_vm_free_levels(&vm->root);
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amdgpu_bo_unreserve(root);
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}
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amdgpu_bo_unref(&root);
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dma_fence_put(vm->last_update);
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for (i = 0; i < AMDGPU_MAX_VMHUBS; i++)
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amdgpu_vm_free_reserved_vmid(adev, vm, i);
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