Handle existing TPU JAX arrays safely in put_data_on_devices

Author: amepas

src/maxdiffusion/pipelines/flux/flux2klein_pipeline.py

@@ -246,6 +246,8 @@ def __call__(
       data_sharding = jax.sharding.NamedSharding(self.mesh, P("data"))
 
       def put_data_on_devices(x, sharding):
+        if isinstance(x, jax.Array) and hasattr(x, "sharding") and not x.sharding.is_fully_addressable:
+          return x
         if hasattr(sharding, "is_fully_addressable") and sharding.is_fully_addressable:
           return jax.device_put(x, sharding)
         return device_put_replicated(x, sharding)