[Intel-gfx] [PATCH 1/5] drm/i915: don't save/restore LBB on Gen5+

[Paulo Zanoni]

From: Paulo Zanoni <paulo.r.zanoni at intel.com>

Because this PCI config register doesn't exist on Gen5+.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni at intel.com>
---
 drivers/gpu/drm/i915/i915_suspend.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c
index 70db618..3538370 100644
--- a/drivers/gpu/drm/i915/i915_suspend.c
+++ b/drivers/gpu/drm/i915/i915_suspend.c
@@ -340,7 +340,9 @@ int i915_save_state(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	int i;
 
-	pci_read_config_byte(dev->pdev, LBB, &dev_priv->regfile.saveLBB);
+	if (INTEL_INFO(dev)->gen <= 4)
+		pci_read_config_byte(dev->pdev, LBB,
+				     &dev_priv->regfile.saveLBB);
 
 	mutex_lock(&dev->struct_mutex);
 
@@ -390,7 +392,9 @@ int i915_restore_state(struct drm_device *dev)
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	int i;
 
-	pci_write_config_byte(dev->pdev, LBB, dev_priv->regfile.saveLBB);
+	if (INTEL_INFO(dev)->gen <= 4)
+		pci_write_config_byte(dev->pdev, LBB,
+				      dev_priv->regfile.saveLBB);
 
 	mutex_lock(&dev->struct_mutex);
 
-- 
1.8.3.1