[PATCH] drm: correctly check failed allocation

[Daniel Vetter]

On Mon, Oct 19, 2015 at 04:33:30PM +0000, Insu Yun wrote:
> drm_property_create_range can be failed in memory pressure
> Therefore, check return value and handle an error
> 
> Signed-off-by: Insu Yun <wuninsu at gmail.com>

There's also other drm_property_create_* functions, and we miss error
handling for a bunch more of these places. Are you working on more
patches?

Merged this one to drm-misc meanwhile, thanks.
-Daniel

> ---
>  drivers/gpu/drm/drm_crtc.c | 30 ++++++++++++++++++++++++++++++
>  1 file changed, 30 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
> index 33d877c..5fb6583 100644
> --- a/drivers/gpu/drm/drm_crtc.c
> +++ b/drivers/gpu/drm/drm_crtc.c
> @@ -1525,6 +1525,9 @@ int drm_mode_create_tv_properties(struct drm_device *dev,
>  					  "select subconnector",
>  					  drm_tv_select_enum_list,
>  					  ARRAY_SIZE(drm_tv_select_enum_list));
> +	if (!tv_selector)
> +		goto nomem;
> +
>  	dev->mode_config.tv_select_subconnector_property = tv_selector;
>  
>  	tv_subconnector =
> @@ -1532,6 +1535,8 @@ int drm_mode_create_tv_properties(struct drm_device *dev,
>  				    "subconnector",
>  				    drm_tv_subconnector_enum_list,
>  				    ARRAY_SIZE(drm_tv_subconnector_enum_list));
> +	if (!tv_subconnector)
> +		goto nomem;
>  	dev->mode_config.tv_subconnector_property = tv_subconnector;
>  
>  	/*
> @@ -1539,42 +1544,67 @@ int drm_mode_create_tv_properties(struct drm_device *dev,
>  	 */
>  	dev->mode_config.tv_left_margin_property =
>  		drm_property_create_range(dev, 0, "left margin", 0, 100);
> +	if (!dev->mode_config.tv_left_margin_property)
> +		goto nomem;
>  
>  	dev->mode_config.tv_right_margin_property =
>  		drm_property_create_range(dev, 0, "right margin", 0, 100);
> +	if (!dev->mode_config.tv_right_margin_property)
> +		goto nomem;
>  
>  	dev->mode_config.tv_top_margin_property =
>  		drm_property_create_range(dev, 0, "top margin", 0, 100);
> +	if (!dev->mode_config.tv_top_margin_property)
> +		goto nomem;
>  
>  	dev->mode_config.tv_bottom_margin_property =
>  		drm_property_create_range(dev, 0, "bottom margin", 0, 100);
> +	if (!dev->mode_config.tv_bottom_margin_property)
> +		goto nomem;
>  
>  	dev->mode_config.tv_mode_property =
>  		drm_property_create(dev, DRM_MODE_PROP_ENUM,
>  				    "mode", num_modes);
> +	if (!dev->mode_config.tv_mode_property)
> +		goto nomem;
> +
>  	for (i = 0; i < num_modes; i++)
>  		drm_property_add_enum(dev->mode_config.tv_mode_property, i,
>  				      i, modes[i]);
>  
>  	dev->mode_config.tv_brightness_property =
>  		drm_property_create_range(dev, 0, "brightness", 0, 100);
> +	if (!dev->mode_config.tv_brightness_property)
> +		goto nomem;
>  
>  	dev->mode_config.tv_contrast_property =
>  		drm_property_create_range(dev, 0, "contrast", 0, 100);
> +	if (!dev->mode_config.tv_contrast_property)
> +		goto nomem;
>  
>  	dev->mode_config.tv_flicker_reduction_property =
>  		drm_property_create_range(dev, 0, "flicker reduction", 0, 100);
> +	if (!dev->mode_config.tv_flicker_reduction_property)
> +		goto nomem;
>  
>  	dev->mode_config.tv_overscan_property =
>  		drm_property_create_range(dev, 0, "overscan", 0, 100);
> +	if (!dev->mode_config.tv_overscan_property)
> +		goto nomem;
>  
>  	dev->mode_config.tv_saturation_property =
>  		drm_property_create_range(dev, 0, "saturation", 0, 100);
> +	if (!dev->mode_config.tv_saturation_property)
> +		goto nomem;
>  
>  	dev->mode_config.tv_hue_property =
>  		drm_property_create_range(dev, 0, "hue", 0, 100);
> +	if (!dev->mode_config.tv_hue_property)
> +		goto nomem;
>  
>  	return 0;
> +nomem:
> +	return -ENOMEM;
>  }
>  EXPORT_SYMBOL(drm_mode_create_tv_properties);
>  
> -- 
> 1.9.1
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch