[bugfix] Fix signature mismatch in DDPCPUHPCAccelerator's model_to_de…

…vice (#5505)

* Update ddp_cpu_hpc_accelerator.py

* Update CHANGELOG.md

CHANGELOG.md

@@ -43,6 +43,7 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Logging only on `not should_accumulate()` during training ([#5417](https://github.com/PyTorchLightning/pytorch-lightning/pull/5417))
 - Resolve interpolation bug with Hydra ([#5406](https://github.com/PyTorchLightning/pytorch-lightning/pull/5406))
 - Check environ before selecting a seed to prevent warning message ([#4743](https://github.com/PyTorchLightning/pytorch-lightning/pull/4743))
+- Fixed signature mismatch in `model_to_device` of `DDPCPUHPCAccelerator` ([#5505](https://github.com/PyTorchLightning/pytorch-lightning/pull/5505))
 
 
 ## [1.1.3] - 2021-01-05

pytorch_lightning/accelerators/ddp_cpu_hpc_accelerator.py

@@ -42,7 +42,7 @@ def __init__(self,
  super().__init__(trainer, cluster_environment, ddp_plugin)
  self.nickname = 'ddp_cpu'
 
- def model_to_device(self, model, process_idx):
+ def model_to_device(self, model):
  model.cpu()
 
  def get_device_ids(self):