Hello Alan, Thank you for your answer. I want to know the descriptor update timing from previous completion interrupt (Bulk-In). > 1. The timing of update a Descriptor is after transfer Completion interrupt. Is my understanding correct? > 2. Is there the status to confirm in descriptor before updating a Descriptor elsewhere? Does it need to know the descriptor type? Thank you Regards Takasugi ********************************************* Texas Instruments Japan Sales and Marketing Yokohama office Takasugi Hirokazu <takasugi@xxxxxx> TEL:03-4331-7124 FAX:045-453-9326 ********************************************* -----Original Message----- From: Alan Stern [mailto:stern@xxxxxxxxxxxxxxxxxxx] Sent: Saturday, September 17, 2011 12:57 AM To: Takasugi, Hirokazu Cc: linux-usb@xxxxxxxxxxxxxxx Subject: Re: DM3725 EHCI HOST controller descriptor update timing On Fri, 16 Sep 2011, Takasugi, Hirokazu wrote: > Hello linux usb community member, > > I have some questions about DM3725 EHCI HOST controller descriptor update timing. Can you please answer me? What descriptors are you referring to? EHCI host controllers use lots of different descriptors. > 1. The timing of update a Descriptor is after transfer Completion interrupt. Is my understanding correct? > 2. Is there the status to confirm in descriptor before updating a Descriptor elsewhere? 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
