From: Felix Kuehling <Felix.Kuehling@xxxxxxx> [ Upstream commit 316baf09d355aec1179981b6dfe28eba50c5ee5b ] In amdgpu_dma_buf_move_notify reserve fences for the page table updates in amdgpu_vm_clear_freed and amdgpu_vm_handle_moved. This fixes a BUG_ON in dma_resv_add_fence when using SDMA for page table updates. Signed-off-by: Felix Kuehling <Felix.Kuehling@xxxxxxx> Reviewed-by: Christian König <christian.koenig@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c index 7bd8e33b14be5..e8b3e9520cf6e 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c @@ -400,7 +400,10 @@ amdgpu_dma_buf_move_notify(struct dma_buf_attachment *attach) continue; } - r = amdgpu_vm_clear_freed(adev, vm, NULL); + /* Reserve fences for two SDMA page table updates */ + r = dma_resv_reserve_fences(resv, 2); + if (!r) + r = amdgpu_vm_clear_freed(adev, vm, NULL); if (!r) r = amdgpu_vm_handle_moved(adev, vm); -- 2.42.0
