[PATCH 1/2] dlpar.c: introduce dlpar_unisolate_drc()

[David Gibson]

On Fri, Apr 16, 2021 at 06:02:15PM -0300, Daniel Henrique Barboza wrote:
> Next patch will execute a set-indicator call in hotplug-cpu.c.
> 
> Create a dlpar_unisolate_drc() helper to avoid spreading more
> rtas_set_indicator() calls outside of dlpar.c.
> 
> Signed-off-by: Daniel Henrique Barboza <danielhb413 at gmail.com>

Reviewed-by: David Gibson <david at gibson.dropbear.id.au>

> ---
>  arch/powerpc/platforms/pseries/dlpar.c   | 14 ++++++++++++++
>  arch/powerpc/platforms/pseries/pseries.h |  1 +
>  2 files changed, 15 insertions(+)
> 
> diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
> index 233503fcf8f0..3ac70790ec7a 100644
> --- a/arch/powerpc/platforms/pseries/dlpar.c
> +++ b/arch/powerpc/platforms/pseries/dlpar.c
> @@ -329,6 +329,20 @@ int dlpar_release_drc(u32 drc_index)
>  	return 0;
>  }
>  
> +int dlpar_unisolate_drc(u32 drc_index)
> +{
> +	int dr_status, rc;
> +
> +	rc = rtas_call(rtas_token("get-sensor-state"), 2, 2, &dr_status,
> +				DR_ENTITY_SENSE, drc_index);
> +	if (rc || dr_status != DR_ENTITY_PRESENT)
> +		return -1;
> +
> +	rtas_set_indicator(ISOLATION_STATE, drc_index, UNISOLATE);
> +
> +	return 0;
> +}
> +
>  int handle_dlpar_errorlog(struct pseries_hp_errorlog *hp_elog)
>  {
>  	int rc;
> diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
> index 4fe48c04c6c2..4ea12037c920 100644
> --- a/arch/powerpc/platforms/pseries/pseries.h
> +++ b/arch/powerpc/platforms/pseries/pseries.h
> @@ -55,6 +55,7 @@ extern int dlpar_attach_node(struct device_node *, struct device_node *);
>  extern int dlpar_detach_node(struct device_node *);
>  extern int dlpar_acquire_drc(u32 drc_index);
>  extern int dlpar_release_drc(u32 drc_index);
> +extern int dlpar_unisolate_drc(u32 drc_index);
>  
>  void queue_hotplug_event(struct pseries_hp_errorlog *hp_errlog);
>  int handle_dlpar_errorlog(struct pseries_hp_errorlog *hp_errlog);

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson
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