[PATCH 05/21] drm/etnaviv: add performance monitor request validation

[Lucas Stach]

Am Freitag, den 09.06.2017, 12:21 +0200 schrieb Christian Gmeiner:
> Check if the selected domain and signal combination exists.
> 
> Signed-off-by: Christian Gmeiner <christian.gmeiner at gmail.com>

Reviewed-by: Lucas Stach <l.stach at pengutronix.de>

> ---
>  drivers/gpu/drm/etnaviv/etnaviv_perfmon.c | 15 +++++++++++++++
>  drivers/gpu/drm/etnaviv/etnaviv_perfmon.h |  2 ++
>  2 files changed, 17 insertions(+)
> 
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
> b/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
> index 9c6f284..b8dc5fa 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_perfmon.c
> @@ -79,3 +79,18 @@ int etnaviv_pm_query_sig(struct etnaviv_gpu *gpu,
>  
>  	return 0;
>  }
> +
> +int etnaviv_pm_req_validate(const struct drm_etnaviv_gem_submit_pmr
> *r)
> +{
> +	const struct etnaviv_pm_domain *dom;
> +
> +	if (r->domain >= ARRAY_SIZE(doms))
> +		return -EINVAL;
> +
> +	dom = &doms[r->domain];
> +
> +	if (r->signal > dom->nr_signals)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_perfmon.h
> b/drivers/gpu/drm/etnaviv/etnaviv_perfmon.h
> index 4b2b518..f20b69c 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_perfmon.h
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_perfmon.h
> @@ -40,4 +40,6 @@ int etnaviv_pm_query_dom(struct etnaviv_gpu *gpu,
>  int etnaviv_pm_query_sig(struct etnaviv_gpu *gpu,
>  	struct drm_etnaviv_pm_signal *signal);
>  
> +int etnaviv_pm_req_validate(const struct drm_etnaviv_gem_submit_pmr
> *r);
> +
>  #endif /* __ETNAVIV_PERFMON_H__ */