diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_panel.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_panel.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c index 7874cecc286..eb5e6e95f3c 100644 --- a/drivers/gpu/drm/i915/intel_panel.c +++ b/drivers/gpu/drm/i915/intel_panel.c @@ -428,6 +428,9 @@ int intel_panel_setup_backlight(struct drm_connector *connector) intel_panel_init_backlight(dev); + if (WARN_ON(dev_priv->backlight.device)) + return -ENODEV; + memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_RAW; props.brightness = dev_priv->backlight.level; @@ -453,8 +456,10 @@ int intel_panel_setup_backlight(struct drm_connector *connector) void intel_panel_destroy_backlight(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - if (dev_priv->backlight.device) + if (dev_priv->backlight.device) { backlight_device_unregister(dev_priv->backlight.device); + dev_priv->backlight.device = NULL; + } } #else int intel_panel_setup_backlight(struct drm_connector *connector) |