> The purpose would be: > 1) Allow writing no descriptors (maybe also skip the strings) when this > flag is set This should be straightforward. I'd rather not skip the strings though since we can already indicate zero strings in the current struct. If we skip strings then the difference between writing zero strings and skipping them would become confusing.
> 2) Disallow linking such an instance to real configuration > 3) Disallow linking real function implementation to our "magic config" Hmm the issue with these is that descriptors aren't available at link time, but rather at bind time. Its currently valid (and possibly useful) to link a ffs instance and then write descriptors after. We could do a mount flag but those aren't visible from configfs. How about we fail to bind() if an empty function is in the normal config, or a nonempty function is in the control config? This should be easy since it is all visible in struct usb_function. --Jerry -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
