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drm/amdgpu: fix invalid fence handling in amdgpu_vm_tlb_flush

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CPU based update doesn't produce a fence, handle such cases properly.

Fixes: d8a3f0a034 ("drm/amdgpu: implement TLB flush fence")
Signed-off-by: Lang Yu <lang.yu@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Lang Yu 2024-09-01 08:56:07 -04:00 committed by Alex Deucher
parent 4da5a95bf1
commit 4453808d9e
1 changed files with 5 additions and 3 deletions
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8
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -908,10 +908,12 @@ amdgpu_vm_tlb_flush(struct amdgpu_vm_update_params *params,
{
struct amdgpu_vm *vm = params->vm;
if (!fence || !*fence)
return;
tlb_cb->vm = vm;
if (!fence || !*fence) {
amdgpu_vm_tlb_seq_cb(NULL, &tlb_cb->cb);
return;
}
if (!dma_fence_add_callback(*fence, &tlb_cb->cb,
amdgpu_vm_tlb_seq_cb)) {
dma_fence_put(vm->last_tlb_flush);