On 2020-11-17 11:37:50 [+0100], Lars-Peter Clausen wrote:
> On PREEMPT_RT enabled kernels unmarked hrtimers are moved into soft
> interrupt expiry mode by default.
>
> The IIO hrtimer-trigger needs to run in hard interrupt context since it
> will end up calling generic_handle_irq() which has the requirement to run
> in hard interrupt context.
>
> Explicitly specify that the timer needs to run in hard interrupt context by
> using the HRTIMER_MODE_REL_HARD flag.
>
> Fixes: f5c2f0215e36 ("hrtimer: Move unmarked hrtimers to soft interrupt expiry on RT")
> Reported-by: Christian Eggers <ceggers@xxxxxxx>
> Signed-off-by: Lars-Peter Clausen <lars@xxxxxxxxxx>
If I remember correctly, this routine should only be used to poll the
primary handler. There were patches for the "other" possible things that
might happen so
Acked-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
for both.
Sebastian
