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

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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



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