[PATCH 14/18] drm/amdgpu: sub levels need to update regardless of parent updates

[Chunming Zhou]

Change-Id: I4373d50e243c20a9f7d00134406496de5f482c44
Signed-off-by: Chunming Zhou <David1.Zhou at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 34 ++++++++++++++++------------------
 1 file changed, 16 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 5c51815..3d2159e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -748,27 +748,25 @@ static int amdgpu_vm_update_level(struct amdgpu_device *adev,
 
 	if (params.ib->length_dw == 0) {
 		amdgpu_job_free(job);
-		return 0;
-	}
-
-	amdgpu_ring_pad_ib(ring, params.ib);
-	amdgpu_sync_resv(adev, &job->sync, parent->bo->tbo.resv,
-			 AMDGPU_FENCE_OWNER_VM);
-	if (shadow)
-		amdgpu_sync_resv(adev, &job->sync, shadow->tbo.resv,
+	} else {
+		amdgpu_ring_pad_ib(ring, params.ib);
+		amdgpu_sync_resv(adev, &job->sync, parent->bo->tbo.resv,
 				 AMDGPU_FENCE_OWNER_VM);
+		if (shadow)
+			amdgpu_sync_resv(adev, &job->sync, shadow->tbo.resv,
+					 AMDGPU_FENCE_OWNER_VM);
 
-	WARN_ON(params.ib->length_dw > ndw);
-	r = amdgpu_job_submit(job, ring, &vm->entity,
-			      AMDGPU_FENCE_OWNER_VM, &fence);
-	if (r)
-		goto error_free;
-
-	amdgpu_bo_fence(parent->bo, fence, true);
-	fence_put(vm->last_dir_update);
-	vm->last_dir_update = fence_get(fence);
-	fence_put(fence);
+		WARN_ON(params.ib->length_dw > ndw);
+		r = amdgpu_job_submit(job, ring, &vm->entity,
+				AMDGPU_FENCE_OWNER_VM, &fence);
+		if (r)
+			goto error_free;
 
+		amdgpu_bo_fence(parent->bo, fence, true);
+		fence_put(vm->last_dir_update);
+		vm->last_dir_update = fence_get(fence);
+		fence_put(fence);
+	}
 	/*
 	 * Recurse into the subdirectories. This recursion is harmless because
 	 * we only have a maximum of 5 layers.
-- 
1.9.1