Hi, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> writes: >> Also, does the gadget subsystem guarantee, that we get the complete() >> callback for the DATA stage of the OUT control request before we get a >> setup() callback for the next control request if there's any? > > As I recall, this isn't mentioned in the documentation. But the UDC > drivers I know of do behave that way, and it's reasonable to assume > they all do. > > After all, a data-stage transfer can't complete _after_ the next Setup > packet arrives. Reception of a new Setup packet invalidates all > ongoing control transfers. Considering that the gadget API handles one stage at a time, it would be impossible for this to not be the case :-) UDCs start a trasnfer only for the setup phase, then process the control request to decide what to do next. -- balbi
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