Re: [PATCH v2 4/6] usb: dwc3: gadget: add remaining sg entries to ring

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On 8/25/2016 12:45 AM, Felipe Balbi wrote:
> 
> Hi,
> 
> Felipe Balbi <felipe.balbi@xxxxxxxxxxxxxxx> writes:
>>> On your testing/next, I see considerable slow down and file
>>> corruption in mass storage.
>>>
>>> After bisecting, this patch seems to be the first one that shows
>>> problems. The device fails even enumeration here.
>>>
>>> I haven't looked in detail at the changes but, do you have any ideas?
>>>
>>> I have attached driver logs.
>>
>> g_mass_storage doesn't use sglists, so I find this to be unlikely. I'll
>> test again but I didn't notice any problems on my side.
> 
> Few things:
> 
> Host sent you a few Resets which I don't know why they're there:
> 
>      irq/16-dwc3-2849  [002] d..2    45.257835: dwc3_event: event (00000101): Reset [U0]
> 
> [...]
> 
>      irq/16-dwc3-2849  [002] d..2    45.352847: dwc3_event: event (00000101): Reset [U0]
> 
> [...]
> 
>      irq/16-dwc3-2849  [002] d..2    45.257835: dwc3_event: event (00000101): Reset [U0]
> 
> [...]
> 
> 4 requests per endpoint, why so few? To test throughput, I've been using
> 96 requests per endpoint :-p

Any trick to get it to do that? We haven't really used the
g_mass_storage for performance testing yet.

Regards,
John
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