amdgpu_ib_ring_tests
int amdgpu_ib_ring_tests(struct amdgpu_device *adev);
r = amdgpu_ib_ring_tests(adev);
r = amdgpu_ib_ring_tests(adev);
r = amdgpu_ib_ring_tests(adev);
r = amdgpu_ib_ring_tests(adev);