drm: correctly check failed allocation

drm_property_create_range can be failed in memory pressure
Therefore, check return value and handle an error

Signed-off-by: Insu Yun <wuninsu@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index e54660a858e1751c21f641816bb657aec1a39517..720a153d1a46165e79aa61f7f7f07f3cc40a3cc0 100644 (file)
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1533,6 +1533,9 @@ 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 =
@@ -1540,6 +1543,8 @@ 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;
 
        /*
@@ -1547,42 +1552,67 @@ 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);