Felipe and Paul: I finally took the time to put more work into the explicit-status-stage project. Now I've got patches adding support to both dummy-hcd and net2280. (The two patches for net2280 I sent earlier today address unrelated issues that turned up while this work was under way.) Along with Paul's work on musb, it seems like a good start and worth merging. Getting someone to do the same for dwc2 and dwc3 shouldn't be very hard, but they are out of my ballpark. Paul, there is one change I think we should make to your original core patch. usb_gadget_control_complete() should not check request->length, because it has to be possible for a gadget driver to send a zero-length reply as the data stage for a control-IN request and still get an implicit status-stage request. Aside from that, everything seems to be ready to move forward. Felipe, any comments? Alan Stern
