Re: gadget file storage with variable maxpacket

On Tue, 13 Nov 2007, ilya wrote:

> hello,
> 
> i guess this question is primarily for alan stern, but i
> do not know his e-mail.
> 
> i was wondering how hard would it be to implement the
> file storage gadget with variable packet size, larger than
> 512, that could be specified as a module option or better
> yet use the maxpacket field in the usb_ep structure.

Then where would the maxpacket field in the usb_ep structure get
initialized in the first place?  A module option would be possible.

> this
> will be neccessary for wireless usb, among many other
> things.

What other things?

> i am not really familiar with writing to disk from
> kernel space, so any suggestions would be appreciated.

Changing the high-speed maxpacket size wouldn't be hard.  It would 
involve editing the block of code that starts with:

	if (gadget_is_dualspeed(gadget)) {

in the fsg_bind() routine.  It wouldn't affect writing to disk at all.

Alan Stern


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