[PATCH] drm/amdkfd: make sure VM is ready for updating operations

[Lang Yu]

When VM is in evicting state, amdgpu_vm_update_range would return -EBUSY.
Then restore_process_worker runs into a dead loop.

Fixes: 2fdba514ad5a ("drm/amdgpu: Auto-validate DMABuf imports in compute VMs")

Signed-off-by: Lang Yu <lang...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 0ae9fd844623..8c71fe07807a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -2900,6 +2900,12 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, 
struct dma_fence __rcu *
 
        amdgpu_sync_create(&sync_obj);
 
+       ret = process_validate_vms(process_info, NULL);
+       if (ret) {
+               pr_debug("Validating VMs failed, ret: %d\n", ret);
+               goto validate_map_fail;
+       }
+
        /* Validate BOs and map them to GPUVM (update VM page tables). */
        list_for_each_entry(mem, &process_info->kfd_bo_list,
                            validate_list) {
-- 
2.25.1