Device drivers handle from GetHandles2 any preferences

In the USB docs
Line 206 Return handles 2 returns the Device drivers handle in R6. However GetHandles2 requires a stream handle to read the handles. Any device that doesn’t open an endpoint with OS_Find won’t have access to the Device drivers handle. The Device drivers handle can be used, for example, in place of the string “USBx” in DeviceFS_CallDevice and would speed up the call.

So the options are:

1. Change how gethandles2 works so that if stream == 0 R6 is returned but the values of r3,r4,r5 are invalid instead of returning an error – as stream == 0 would do now. Not happy with this – changes behaviour and not intuative without reading that r3,r4,r5 are invalid.

or 2. Add a GetDeviceHandle action code to DeviceFS_CallDevice. This is my prefered way but its a bit embarassing. First we have GetHandles then GetHandles2 and now GetDeviceHandle.

Any preferences – I’ll implement 2 unless there are any objections