Re: "USB MS CV Failing"

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Hi,

The packet is there on the USB bus, as well as the UDC driver.

But it had not reached the gadget.

Thanks,
Chiranjeevi.

On Wed, Aug 12, 2009 at 1:35 PM, Rajaram R<rajaram.officemail@xxxxxxxxx> wrote:
> On Wed, Aug 12, 2009 at 3:59 PM, velempati
> Chiranjeevi<velem.usb@xxxxxxxxx> wrote:
>> Hi,
>>
>> I am currently working on the gadget framework. While performing the
>> Mass storage CV test,
>> around 50 % of the time the test passes and around 50 % of the time
>> the test fails with the
>> same code base.
>>
>> After doing a mass storage reset and after clearing the bulk-in &
>> bulk-out endpoints, the host
>> tries to issue the INQUIRY command, and the devices is not able to
>> receive the command.
>>
>> Is the issue, with the latency involved with the kernel thread? When
>> the test passes, how did the
>> INQUIRY command get through with the same code base.
>>
>> Is there a way to decrease the latency of the kernel thread of the mass storage?
>
> AFAIK there is no timing requirement at class level??. When it fails,
> till what level the USB packet reaches ? By level i mean ->can you see
> the packet in :
>
> i) USB bus
> ii) @ UDC driver
> iii) @ Gadget Driver
> ....
> .....
>>
>>
>> Thanks,
>> Chiranjeevi.
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