accel/habanalabs: disable events ioctls on control device

Because it is not used and also, for graceful reset to work
those ioctls should run on the compute device.
Signed-off-by: Dafna Hirschfeld <dhirschfeld@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

drivers/accel/habanalabs/common/device.c

@@ -572,11 +572,6 @@ static int hl_device_release_ctrl(struct inode *inode, struct file *filp)
 	list_del(&hpriv->dev_node);
 	mutex_unlock(&hdev->fpriv_ctrl_list_lock);
 out:
-	/* release the eventfd */
-	if (hpriv->notifier_event.eventfd)
-		eventfd_ctx_put(hpriv->notifier_event.eventfd);
-
-	mutex_destroy(&hpriv->notifier_event.lock);
 	put_pid(hpriv->taskpid);
 
 	kfree(hpriv);
@@ -1995,14 +1990,6 @@ void hl_notifier_event_send_all(struct hl_device *hdev, u64 event_mask)
 		hl_notifier_event_send(&hpriv->notifier_event, event_mask);
 
 	mutex_unlock(&hdev->fpriv_list_lock);
-
-	/* control device */
-	mutex_lock(&hdev->fpriv_ctrl_list_lock);
-
-	list_for_each_entry(hpriv, &hdev->fpriv_ctrl_list, dev_node)
-		hl_notifier_event_send(&hpriv->notifier_event, event_mask);
-
-	mutex_unlock(&hdev->fpriv_ctrl_list_lock);
 }
 
 /*

drivers/accel/habanalabs/common/habanalabs_drv.c

@@ -296,7 +296,6 @@ int hl_device_open_ctrl(struct inode *inode, struct file *filp)
 	hpriv->hdev = hdev;
 	filp->private_data = hpriv;
 
-	mutex_init(&hpriv->notifier_event.lock);
 	nonseekable_open(inode, filp);
 
 	hpriv->taskpid = get_task_pid(current, PIDTYPE_PID);

drivers/accel/habanalabs/common/habanalabs_ioctl.c

@@ -1104,6 +1104,17 @@ int hl_info_ioctl(struct drm_device *ddev, void *data, struct drm_file *file_pri
 
 static int hl_info_ioctl_control(struct hl_fpriv *hpriv, void *data)
 {
+	struct hl_info_args *args = data;
+
+	switch (args->op) {
+	case HL_INFO_GET_EVENTS:
+	case HL_INFO_UNREGISTER_EVENTFD:
+	case HL_INFO_REGISTER_EVENTFD:
+		return -EOPNOTSUPP;
+	default:
+		break;
+	}
+
 	return _hl_info_ioctl(hpriv, data, hpriv->hdev->dev_ctrl);
 }