On Sun, 18 Sep 2011, Takasugi, Hirokazu wrote: > Hello Alan, > > Thank you for your response. > > >I still don't know what descriptor you're talking about. The qTD? The QH descriptor? Something else? > The your answer is the qTD. > > >Maybe _it_ doesn't need to know the descriptor type -- but if I'm going to answer your question then _I_ need to know! :-) > I understood. i want to know the reference of these sequence. > > > 1. The timing of update a Descriptor is after transfer Completion interrupt. Is my understanding correct? Okay, the answer is No. The qTD is updated _before_ the completion interrupt, not _after_. > > > 2. Is there the status to confirm in descriptor before updating a Descriptor elsewhere? I don't understand this question. Please give more details about what you want to know. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
