/*
* disables the asynch behaviour of the control message. This is used for data
* transfers that uses the exclusiv access to the control and bulk messages.
+ * Returns the old value so it can be restored later.
*/
-void usb_disable_asynch(int disable)
+int usb_disable_asynch(int disable)
{
+ int old_value = asynch_allowed;
+
asynch_allowed = !disable;
+ return old_value;
}