Re: [PATCH 3/4] cpu/hotplug: Add cpuhp_invoke_callback_range()

[Peter Zijlstra]

On Mon, Jan 11, 2021 at 05:10:46PM +0000, vincent.donnefort@xxxxxxx wrote:
> @@ -475,6 +478,11 @@ cpuhp_set_state(struct cpuhp_cpu_state *st, enum cpuhp_state target)
>  static inline void
>  cpuhp_reset_state(struct cpuhp_cpu_state *st, enum cpuhp_state prev_state)
>  {
> +	st->target = prev_state;
> +
> +	if (st->rollback)
> +		return;

I'm thinking that if we call rollback while already rollback we're hosed
something fierce, no?

That like going up, failing, going back down again, also failing, giving
up in a fiery death.