ARM BCM53573 SoC hangs/lockups caused by locks/clock/random changes

[Linus Walleij]

On Wed, Nov 29, 2023 at 10:20 PM Rafał Miłecki <zajec5 at gmail.com> wrote:

> Here comes more interesting experiment though. Putting there:
>
> if (!(foo++ % 10000)) {
>         pr_info("[%s] arm_pm_idle:%ps\n", __func__, arm_pm_idle);
> }
>
> doesn't seem to help.
>
>
> Putting following however seems to make kernel/device stable:
>
> if (!(foo++ % 100)) {
>         pr_info("[%s] arm_pm_idle:%ps\n", __func__, arm_pm_idle);
> }

That's just too weird.

> I think I'm just going to assume those chipsets are simply hw broken.

If disabling CPU idle on these altogether stabilize them, then maybe that
is what we need to do?

Yours,
Linus Walleij