From b2af92c821f139413db2e16c4a2c0340c89a03ff Mon Sep 17 00:00:00 2001
From: Christopher Milan <chrismilan@ucla.edu>
Date: Tue, 25 Nov 2025 23:33:48 -0500
Subject: [PATCH] fix HCQGraph.__del__ bug when finalizing (#13298)

* fix _do_ioctl import

* fix circular import

* suppress_finalizing instead
---
 tinygrad/runtime/graph/hcq.py | 3 ++-
 tinygrad/runtime/ops_qcom.py  | 1 +
 tinygrad/runtime/support/c.py | 3 ++-
 3 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/tinygrad/runtime/graph/hcq.py b/tinygrad/runtime/graph/hcq.py
index a025cf4655..7ee71e5452 100644
--- a/tinygrad/runtime/graph/hcq.py
+++ b/tinygrad/runtime/graph/hcq.py
@@ -1,6 +1,6 @@
 import collections, time
 from typing import Any, cast
-from tinygrad.helpers import round_up, PROFILE, merge_dicts, getenv, dedup
+from tinygrad.helpers import round_up, PROFILE, merge_dicts, getenv, dedup, suppress_finalizing
 from tinygrad.runtime.support.hcq import HCQCompiled, HCQAllocator, HCQSignal, HCQBuffer, HWQueue, HCQArgsState, BumpAllocator, MMIOInterface
 from tinygrad.device import Buffer, BufferSpec, Compiled, Device, ProfileGraphEntry, ProfileGraphEvent
 from tinygrad.dtype import dtypes
@@ -221,6 +221,7 @@ class HCQGraph(MultiGraphRunner):
 
   def dev_name(self, dev) -> str: return dev.device.replace(":", "_")
 
+  @suppress_finalizing
   def __del__(self):
     for dev in self.devices: self.last_timeline[dev][0].wait(self.last_timeline[dev][1])
 
diff --git a/tinygrad/runtime/ops_qcom.py b/tinygrad/runtime/ops_qcom.py
index 09652359f4..7ec0ba89fa 100644
--- a/tinygrad/runtime/ops_qcom.py
+++ b/tinygrad/runtime/ops_qcom.py
@@ -51,6 +51,7 @@ class QCOMComputeQueue(HWQueue):
     self.dev = dev
     super().__init__()
 
+  @suppress_finalizing
   def __del__(self):
     if self.binded_device is not None: self.binded_device.allocator.free(self.hw_page, self.hw_page.size, BufferSpec(cpu_access=True, nolru=True))
 
diff --git a/tinygrad/runtime/support/c.py b/tinygrad/runtime/support/c.py
index c441942b58..fb6da8a2f0 100644
--- a/tinygrad/runtime/support/c.py
+++ b/tinygrad/runtime/support/c.py
@@ -1,9 +1,10 @@
 import ctypes, functools, sys
 from typing import TYPE_CHECKING
-from tinygrad.helpers import flatten
+from tinygrad.helpers import flatten, WIN
 from _ctypes import _SimpleCData
 
 def _do_ioctl(__idir, __base, __nr, __struct, __fd, *args, __payload=None, **kwargs):
+  assert not WIN, "ioctl not supported"
   import tinygrad.runtime.support.hcq as hcq, fcntl
   ioctl = __fd.ioctl if isinstance(__fd, hcq.FileIOInterface) else functools.partial(fcntl.ioctl, __fd)
   if (rc:=ioctl((__idir<<30)|(ctypes.sizeof(out:=(__payload or __struct(*args, **kwargs)))<<16)|(__base<<8)|__nr, out)):