Regression: serial: imx: overrun errors on debug UART

[Greg Kroah-Hartman]

On Tue, Jun 20, 2023 at 04:47:10PM +0200, Linux regression tracking (Thorsten Leemhuis) wrote:
> On 24.05.23 15:07, Stefan Wahren wrote:
> > 
> > Am 23.05.23 um 21:44 schrieb Sergey Organov:
> >> "Linux regression tracking (Thorsten Leemhuis)"
> >> <regressions at leemhuis.info> writes:
> >>
> >> Solving this would need to identify the cause of interrupts being
> >> disabled for prolonged times, and nobody volunteered to investigate this
> >> further. One suspect, the Linux serial console, has been likely excluded
> >> already though, as not actually being in use for printk() output.
> >>
> > 
> > I don't think that we can exclude the serial console as a whole, i never
> > made such a observation. But at least we can exclude kernel logging on
> > the debug UART.
> 
> Stefan, just wondering: was this ever addressed upstream? I assume it's
> not, just wanted to be sure.
> 
> I'm a bit unsure what to do with this and consider asking Greg for
> advice, as he applied the patch. On one hand it's *IMHO* clearly a
> regression (but for the record,  some people involved in the discussion
> claim it's not). OTOH the culprit was applied more than a year ago now,
> so reverting it might cause more trouble than it's worth at this point,
> as that could lead to regressions for other users.

I'll be glad to revert this, but for some reason I thought that someone
was working on a "real fix" here.  Stefan, is that not the case?

thanks,

greg k-h