Re: MUSB interrupt storm on device removal

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Bin Liu <b-liu@xxxxxx> writes:

>> > > Why doesn't the same problem occur with other types of host controller?
>> > 
>> > Not sure, I am on musb for most of the times. Maybe other HCD doesn't
>> > giveback URBs with -EPROTO in such error case.
>> 
>> ehci-hcd also uses -EPROTO.
>
> Is it possible to test the use case on ehci?
>
> - connect a multi-ports usb serial device to a hub;
> - open multiple ports with cat command;
> - remove the usb serial device from the hub;
> - console lockup happens?

It doesn't seem to happen using ehci or even musb on Allwinner A20.
I have only seen the problem with musb on AM3358.

-- 
Måns Rullgård



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