Fix RuntimeError for moe on XPU: tensors found at least two devices #5519
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There is following error on XPU while unit testing "DeepSpeed/tests/unit/moe/test_moe.py"
DeepSpeed/deepspeed/moe/sharded_moe.py line 223, in top1gating
RuntimeError: Expected all tensors to be on the same device, but found at least two devices, xpu:0 and cpu!
Fix it by device conversion.