diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index ac0f6b5cfdf..cc426e10d74 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -11508,12 +11508,21 @@ int intel_modeset_vga_set_state(struct drm_device *dev, bool state) unsigned reg = INTEL_INFO(dev)->gen >= 6 ? SNB_GMCH_CTRL : INTEL_GMCH_CTRL; u16 gmch_ctrl; - pci_read_config_word(dev_priv->bridge_dev, reg, &gmch_ctrl); + if (pci_read_config_word(dev_priv->bridge_dev, reg, &gmch_ctrl)) { + DRM_ERROR("failed to read control word\n"); + return -EIO; + } + if (state) gmch_ctrl &= ~INTEL_GMCH_VGA_DISABLE; else gmch_ctrl |= INTEL_GMCH_VGA_DISABLE; - pci_write_config_word(dev_priv->bridge_dev, reg, gmch_ctrl); + + if (pci_write_config_word(dev_priv->bridge_dev, reg, gmch_ctrl)) { + DRM_ERROR("failed to write control word\n"); + return -EIO; + } + return 0; } |