Re: Recovering from transaction errors [was: Re: [syzbot] INFO: rcu detected stall in tx]

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Alan Stern wrote:
> On Fri, May 21, 2021 at 02:12:43AM +0000, Thinh Nguyen wrote:
>> Alan Stern wrote:
>>> At the moment, I think the best approach is Guido's suggestion to reject 
>>> URBs submitted to endpoints that have gotten a transaction error, until 
>>> the error status has somehow been cleared.  Is that what you would like 
>>> to see automated?
>>>
>>
>> First, just want to point out that I'm not familiar with syzbot. I was
>> just thinking if this issue occurs, and if the user wants to start a new
>> test, then she doesn't have to unplug+plug the device back and allow
>> some application to automatically trigger a new test after a failure.
> 
> If you're just talking about syzbot testing, this isn't a issue.  Syzbot 
> doesn't test real devices; it tests emulated devices using a 
> special-purpose userspace driver.
> 
> Alan Stern
> 

Ah I see. Thanks for the clarification.

BR,
Thinh




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