From fe706fab95cc5983f9f5f4f59f85ab7f26cb5fe0 Mon Sep 17 00:00:00 2001 From: Lang Yu Date: Sun, 1 Sep 2024 08:56:07 -0400 Subject: [PATCH] drm/amdgpu: fix invalid fence handling in amdgpu_vm_tlb_flush MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit [ Upstream commit 4453808d9eab0461dea338e89372ffc4a3c50acc ] CPU based update doesn't produce a fence, handle such cases properly. Fixes: d8a3f0a0348d ("drm/amdgpu: implement TLB flush fence") Signed-off-by: Lang Yu Reviewed-by: Christian König Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 0f7106066480e..3fdbc10aebce1 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -902,10 +902,12 @@ amdgpu_vm_tlb_flush(struct amdgpu_vm_update_params *params, { struct amdgpu_vm *vm = params->vm; - if (!fence || !*fence) + tlb_cb->vm = vm; + if (!fence || !*fence) { + amdgpu_vm_tlb_seq_cb(NULL, &tlb_cb->cb); return; + } - tlb_cb->vm = vm; if (!dma_fence_add_callback(*fence, &tlb_cb->cb, amdgpu_vm_tlb_seq_cb)) { dma_fence_put(vm->last_tlb_flush); -- 2.47.2