Re: [PATCH RFC] dmaengine: dw: Prevent tx-status calling desc callback (Fix UART deadlock!)

[Andy Shevchenko]

On Fri, Aug 23, 2024 at 12:48 PM Serge Semin <fancer.lancer@xxxxxxxxx> wrote:
>
> Hi folks
>
> Any comments or suggestion about the change? The kernel occasionally
> _deadlocks_ without it for the DW UART + DW DMAC hardware setup.

I have no time to look at that, but FWIW with a stress tests on older
machines I have seen something similar from time to time (less than
10% reproducibility ration IIRC).

P.S. Is there is any possibility to have a step-by-step reproducer?
Also can we utilise (and update if needed) the open source project
https://github.com/cbrake/linux-serial-test?

-- 
With Best Regards,
Andy Shevchenko