GM: handle run-away set speed (#26480)

* GM: Handle run-away set speed

* bumpo

* This is a test of both PRs combined

* tempbump

* Revert "tempbump"

This reverts commit b73e04fca25e6a1bac889e44afac6430d5ad7c30.

* Revert "This is a test of both PRs combined"

This reverts commit 22cc0e6900e0f0470f14ed55e7846e4b1d570826.

* fix

* bump

* fix that

* Bump to master

* fix fix
old-commit-hash: 65f494d845

panda

@@ -1 +1 @@
-Subproject commit d57311126860c9a87edf5b7b9f81a2a038866a26
+Subproject commit 0096d0c4fc50d199ca46c6fe40479e1547408aed

selfdrive/car/gm/interface.py

@@ -211,7 +211,12 @@ class CarInterface(CarInterfaceBase):
     ret = self.CS.update(self.cp, self.cp_cam, self.cp_loopback)
 
     if self.CS.cruise_buttons != self.CS.prev_cruise_buttons and self.CS.prev_cruise_buttons != CruiseButtons.INIT:
-      ret.buttonEvents = [create_button_event(self.CS.cruise_buttons, self.CS.prev_cruise_buttons, BUTTONS_DICT, CruiseButtons.UNPRESS)]
+      buttonEvents = [create_button_event(self.CS.cruise_buttons, self.CS.prev_cruise_buttons, BUTTONS_DICT, CruiseButtons.UNPRESS)]
+      # Handle ACCButtons changing buttons mid-press
+      if self.CS.cruise_buttons != CruiseButtons.UNPRESS and self.CS.prev_cruise_buttons != CruiseButtons.UNPRESS:
+        buttonEvents.append(create_button_event(CruiseButtons.UNPRESS, self.CS.prev_cruise_buttons, BUTTONS_DICT, CruiseButtons.UNPRESS))
+
+      ret.buttonEvents = buttonEvents
 
     events = self.create_common_events(ret, extra_gears=[GearShifter.sport, GearShifter.low,
                                                          GearShifter.eco, GearShifter.manumatic],