[Intel-gfx] [PATCH 3/6] drm: WARN when trying to add enum value > 63 to a bitmask property

[Daniel Vetter]

On Tue, Mar 06, 2018 at 06:48:46PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Enum values >63 with a bitmask property is a programmer error. WARN
> when someone is attempting this.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

> ---
>  drivers/gpu/drm/drm_property.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_property.c b/drivers/gpu/drm/drm_property.c
> index e676b1ecc705..019d1abb94ca 100644
> --- a/drivers/gpu/drm/drm_property.c
> +++ b/drivers/gpu/drm/drm_property.c
> @@ -386,8 +386,8 @@ int drm_property_add_enum(struct drm_property *property, int index,
>  	 * Bitmask enum properties have the additional constraint of values
>  	 * from 0 to 63
>  	 */
> -	if (drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
> -			(value > 63))
> +	if (WARN_ON(drm_property_type_is(property, DRM_MODE_PROP_BITMASK) &&
> +		    value > 63))
>  		return -EINVAL;
>  
>  	list_for_each_entry(prop_enum, &property->enum_list, head) {
> -- 
> 2.16.1
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch