From 92af2d3b57a1afdfdcafb1c6a07ffd89cf3e98fb Mon Sep 17 00:00:00 2001 From: Eric Huang Date: Mon, 9 Jan 2023 14:16:42 -0500 Subject: [PATCH] drm/amdkfd: Add sync after creating vram bo [ Upstream commit ba029e9991d9be90a28b6a0ceb25e9a6fb348829 ] There will be data corruption on vram allocated by svm if the initialization is not complete and application is writting on the memory. Adding sync to wait for the initialization completion is to resolve this issue. Signed-off-by: Eric Huang Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 64fdf63093a0..63feea08904c 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -570,6 +570,15 @@ svm_range_vram_node_new(struct amdgpu_device *adev, struct svm_range *prange, goto reserve_bo_failed; } + if (clear) { + r = amdgpu_bo_sync_wait(bo, AMDGPU_FENCE_OWNER_KFD, false); + if (r) { + pr_debug("failed %d to sync bo\n", r); + amdgpu_bo_unreserve(bo); + goto reserve_bo_failed; + } + } + r = dma_resv_reserve_fences(bo->tbo.base.resv, 1); if (r) { pr_debug("failed %d to reserve bo\n", r);