Re: Regression in v5.0-rc1 with autosuspend hrtimers

[Vincent Guittot]

Hi Tony,

On Tue, 8 Jan 2019 at 00:38, Tony Lindgren <tony@xxxxxxxxxxx> wrote:
>
> Hi all,
>
> Looks like commit 8234f6734c5d ("PM-runtime: Switch autosuspend
> over to using hrtimers") caused a regression on at least
> omap5-uevm where 8250 UART rx wake no longer works. I have not
> noticed this happening on others so far.
>
> The devices I've tested all are using 8250 with dedicated
> wakeirqs configured for the rx pin. I can see the interrupt
> increase on omap5-uevm after some one or more keypresses,
> but then nothing. It seems that the uart just falls back
> asleep right away or something.
>
> Any ideas what might be going wrong?

What is the autosuspend value ? Can it be that the autosuspend is set
to a short value but was finally greater than 10-20ms on arm32. And
now the autosuspend happens before and this has changed the sequence ?

Regards,
Vincent
>
> Regards,
>
> Tony
>