Re: [PATCH] usb: gadget: f_midi: Fixed a bug when buflen was smaller than wMaxPacketSize

From: Clemens Ladisch
Date: Tue Mar 15 2016 - 05:49:19 EST

Felipe Ferreri Tonello wrote:
> On 11/03/16 23:07, Michal Nazarewicz wrote:
>> Iâm also wondering whether it would be beneficial to get rid of buflen
>> all together and use wMaxPacketSie for in endpoints as well? Is that
>> feasible?
> Yes, we could just remove the buflen parameter.
> The only scenario where I can see buflen been "useful" is if the user
> wants to have a smaller buffer size for the OUT endpoint. Should we
> support this case or not?

Splitting data into multiple packets would not make sense from
a performance perspective. The only possible reason would be to work
around a (theoretical) bug in some host software that does not handle
larger buffers, but there aren't that many host implementations, and I
am not aware of any with such a bug.