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Date:   Mon, 4 May 2020 10:24:00 -0400 (EDT)
From:   Alan Stern <stern@rowland.harvard.edu>
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To:     Andrey Konovalov <andreyknvl@google.com>,
        Felipe Balbi <balbi@kernel.org>
cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        USB list <linux-usb@vger.kernel.org>,
        Dmitry Vyukov <dvyukov@google.com>
Subject: Re: Testing endpoint halt support for raw-gadget
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On Mon, 4 May 2020, Andrey Konovalov wrote:

> One more question (sorry for so many :).
> 
> Looking at other fields of usb_request struct I see frame_number.
> AFAIU it's filled in by the UDC driver for ISO transfers. Does it make
> sense to expose it to userspace? I don't see any composite/legacy
> gadgets use that field at all.

Do any of those gadget drivers use isochronous endpoints?

In fact, it also looks like none of the drivers in gadget/udc/ touch
the frame_number field.  Maybe we should just get rid of it, since it
isn't being used.

Felipe, any preference?

Alan Stern