>> Maybe I can try this with the mouse.
>> As far as I know, most HDD and pendrive do not use periodic tranfer.
>> So they can not produce the issue.
> 
> few emails back you said it had nothing to do with periodic
> transfers. -ECONFUSED 
> 

I try two experiment,

1. Test it on general desktop, the device will enum as CDC_ECM( 1 control, 2 
bulk, 1 interrupt), 
and CDC_ECM driver will use interupt to polling link status.

2. Test it on embedded system, the device will controlled by a custom driver ( 
1 control, 2 bulk, 1 interrupt).
The configure endpoint will allocate bandwith for interrupt endpoint.
But the driver nevery use interrupt endpoint.

In previous mail, I reply the experiment 2 as you suggest try not sending any 
periodic transfer.

The real issue is related to xHC(hardware) allocate bandwidth to periodic 
endpoint.

Hope this explanation clearify your question. Thanks.--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to