drm/amdgpu: cleanup amdgpu_ctx inti/fini v2

Cleanup the kernel context handling.

v2: rebased

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com> (v1)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 801ebfc..42d1a22 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -1525,13 +1525,10 @@
 		return r;
 	}
 
-	if (!adev->kernel_ctx) {
-		uint32_t id = 0;
-		r = amdgpu_ctx_alloc(adev, NULL, &id);
-		if (r) {
-			dev_err(adev->dev, "failed to create kernel context (%d).\n", r);
-			return r;
-		}
+	r = amdgpu_ctx_init(adev, true, &adev->kernel_ctx);
+	if (r) {
+		dev_err(adev->dev, "failed to create kernel context (%d).\n", r);
+		return r;
 	}
 	r = amdgpu_ib_ring_tests(adev);
 	if (r)
@@ -1594,7 +1591,7 @@
 	adev->shutdown = true;
 	/* evict vram memory */
 	amdgpu_bo_evict_vram(adev);
-	amdgpu_ctx_free(adev, NULL, 0);
+	amdgpu_ctx_fini(&adev->kernel_ctx);
 	amdgpu_ib_pool_fini(adev);
 	amdgpu_fence_driver_fini(adev);
 	amdgpu_fbdev_fini(adev);