[CustomDevice] fix Tensor._to (#45337)

python/paddle/fluid/dygraph/varbase_patch_methods.py

@@ -429,12 +429,14 @@ def monkey_patch_varbase():
         if device is not None:
             if isinstance(device, str):
                 device = paddle.device._convert_to_place(device)
-            elif isinstance(device, (core.CPUPlace, core.CUDAPlace,
-                                     core.CUDAPinnedPlace, core.XPUPlace)):
+            elif isinstance(
+                    device,
+                (core.CPUPlace, core.CUDAPlace, core.CUDAPinnedPlace,
+                 core.XPUPlace, core.CustomPlace)):
                 pass
             else:
                 raise ValueError(
-                    "device value error, must be str, paddle.CPUPlace(), paddle.CUDAPlace(), paddle.CUDAPinnedPlace() or paddle.XPUPlace(), but the type of device is "
+                    "device value error, must be str, paddle.CPUPlace(), paddle.CUDAPlace(), paddle.CUDAPinnedPlace(), paddle.XPUPlace() or paddle.CustomPlace(), but the type of device is "
                     + type(device).__name__)
 
         if blocking is None: