[U-Boot] [PATCH V4 03/17] usb: gadget: ether set wMaxPacketSize

Troy Kisky
2013-09-20T18:34:11Z

On 9/20/2013 3:52 AM, Marek Vasut wrote:
> Dear Troy Kisky,
>
>> set wMaxPacketSize for full speed descriptors
>> fs_source_desc, fs_sink_desc to 64.
>>
>> Full-speed bulk endpoint can have a maximum packet size of
>> 8, 16, 32, or 64 bytes, so choice 64.
>>
>> The hs_source_desc, hs_sink_desc, already have their wMaxPacketSize
>> set to 512. That is the only legal value for high speed bulk endpoints.
>>
>> Signed-off-by: Troy Kisky <troy.kisky@boundarydevices.com>
> Why do we need this patch? What issue does this fix ?
>
> Best regards,
> Marek Vasut
>
I could try full speed mode without this and see how linux behaves when
given bad data,
but that would not says anything about other O.S.es. It seems safer just
not to give out
bad data.

Troy