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SubjectRe: [PATCH v1 1/3] usb: gadget: NCM: RX function support multiple NDPs
On 29/05/14 19:55, Bjørn Mork wrote:
> Jim Baxter <jim_baxter@mentor.com> writes:
>
>> The NDP was ignoring the wNextNdpIndex in the NDP which
>> means that NTBs containing multiple NDPs would have missed
>> frames.
>
> Well, just for the record: I believe this field was meant to be reserved
> and always 0 in the CDC NCM spec. Table 3-3, describing 16bit NDPs,
> says so. But reading the spec now, I noticed that there is an
> inconsistency between table 3-3 and table 3-4 describing 32bit NDPs. It
> looks like the field is not reserved in the 32bit version.
>
> I am pretty sure that is a specification error, but I guess it doesn't
> harm to implement the support anyway. And it paves the way for an MBIM
> gadget :-)
>
>
>
>
> Bjørn
>

Yes I was looking at Figure 3-1, Figure 3-2 which all state it is a
link. I must have been reading Table 3-4.

I am glad to see it helps with the MBIM specification :-) .

Jim


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