drm/amdgpu: avoid restore process run into dead loop.

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: gaba <gaba@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index f61527b..a7f314d 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -2881,6 +2881,9 @@ 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) {