Re: [PATCH v3 1/4] drm/crtc: Add property for aspect ratio

[Vandana Kannan <vandana.kannan@intel.com>]

On Jun-05-2014 2:58 PM, Thierry Reding wrote:
> On Thu, Jun 05, 2014 at 02:40:08PM +0530, Vandana Kannan wrote:
> [...]
>> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> [...]
>>  /**
>> + * drm_mode_create_aspect_ratio_property - create aspect ratio property
>> + * @dev: DRM device
>> + *
>> + * Called by a driver the first time it's needed, must be attached to desired
>> + * connectors.
>> + */
>> +int drm_mode_create_aspect_ratio_property(struct drm_device *dev)
>> +{
>> +	if (dev->mode_config.aspect_ratio_property)
>> +		return 0;
>> +
>> +	dev->mode_config.aspect_ratio_property =
>> +		drm_property_create_enum(dev, 0, "aspect ratio",
>> +				drm_aspect_ratio_enum_list,
>> +				ARRAY_SIZE(drm_aspect_ratio_enum_list));
>> +
>> +	return 0;
> 
> Sorry for not noticing this before: what if drm_propert_create_enum()
> fails? Should that return an error? This function will currently
> silently ignore failure to create the property.
> 
> Thierry
> 
Yes..
I can
1. modify this to return the property (which would be NULL if create
fails) and have a NULL check at the calling end or
2. have a NULL check for the property at the calling end keeping the
existing implementation or
3. return a non-zero value in case of failure.

Please let me know your inputs on this..
- Vandana