Hi,
John Youn <John.Youn@xxxxxxxxxxxx> writes:
>>> However, I'm not aware of any issue with END_TRANSFER, could you let
>>> me know how to reproduce it?
>>
>> it's a rare and difficult bug to reproduce. If you take my testing/next
>> (I didn't check if it happens with v4.7-rc1) - $subject and keep large
>> mass storage transfers going on, eventually you'll see mass storage
>> hang. After some 30s, host side will timeout and cancel all URBs and
>> issue a bus reset. This will, in turn, cause the gadget driver to issue
>> END_TRANSFER to a possible in-flight transfer.
>>
>> After Reset completion, the gadget will reenumerate and, when gadget
>> driver queues to a bulk EP, StartTransfer will return "No Resource". The
>> reason for that is that END_TRANSFER deallocates the resource, according
>> to section 6.3.5.2 of 2.60a databook.
^^^^^^^^^^^^^^^
section 6.3.2.5.2
> Do you know if the END_TRANSFER completes successfully? It could be
oh yeah, it completes just fine
> that the END_TRANFER failed and it continues to tie up the resource.
>
> I'll ask around to see if there is any other possibilities as well.
thanks
--
balbi
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