Am 2023-03-02 um 13:15 schrieb Gang Ba:
In restore process worker, pinned BO cause update PTE fail, then
the function re-schedule the restore_work. This will generate dead loop.
Signed-off-by: Gang Ba <gaba@xxxxxxx>
Reviewed-by: Felix Kuehling <Felix.Kuehling@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 4b46b936a804..a38be83e486e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -2586,7 +2586,7 @@ int amdgpu_amdkfd_gpuvm_export_ipc_obj(struct amdgpu_device *adev, void *vm,
struct dma_buf *dmabuf;
int r;
- if (!adev|| !vm || !mem)
+ if (!adev || !vm || !mem)
return -EINVAL;
mutex_lock(&mem->lock);
@@ -3170,6 +3170,9 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef)
if (!attachment->is_mapped)
continue;
+ if (attachment->bo_va->base.bo->tbo.pin_count)
+ continue;
+
kfd_mem_dmaunmap_attachment(mem, attachment);
ret = update_gpuvm_pte(mem, attachment, &sync_obj);
if (ret) {
