1 files changed, 10 insertions, 8 deletions

diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 043e36628d6d..1108665913e2 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -54,8 +54,7 @@
                  agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965Q_HB || \
                  agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965G_HB || \
                  agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965GM_HB || \
-                 agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965GME_HB || \
-                 agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_GM45_HB)
+                 agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_82965GME_HB)
 
 #define IS_G33 (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_G33_HB || \
                 agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_Q35_HB || \
@@ -63,7 +62,8 @@
 
 #define IS_G4X (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_IGD_E_HB || \
                 agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_Q45_HB || \
-                agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_G45_HB)
+                agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_G45_HB || \
+                agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_GM45_HB)
 
 extern int agp_memory_reserved;
 
@@ -214,8 +214,8 @@ static int intel_i810_configure(void)
         if (agp_bridge->driver->needs_scratch_page) {
                 for (i = 0; i < current_size->num_entries; i++) {
                         writel(agp_bridge->scratch_page, intel_private.registers+I810_PTE_BASE+(i*4));
-                        readl(intel_private.registers+I810_PTE_BASE+(i*4));     /* PCI posting. */
                 }
+                readl(intel_private.registers+I810_PTE_BASE+((i-1)*4)); /* PCI posting. */
         }
         global_cache_flush();
         return 0;
@@ -525,8 +525,10 @@ static void intel_i830_init_gtt_entries(void)
                 size += 4;
         } else if (IS_G4X) {
                 /* On 4 series hardware, GTT stolen is separate from graphics
-                 * stolen, ignore it in stolen gtt entries counting */
-                size = 0;
+                 * stolen, ignore it in stolen gtt entries counting.  However,
+                 * 4KB of the stolen memory doesn't get mapped to the GTT.
+                 */
+                size = 4;
         } else {
                 /* On previous hardware, the GTT size was just what was
                  * required to map the aperture.
@@ -773,8 +775,8 @@ static int intel_i830_configure(void)
         if (agp_bridge->driver->needs_scratch_page) {
                 for (i = intel_private.gtt_entries; i < current_size->num_entries; i++) {
                         writel(agp_bridge->scratch_page, intel_private.registers+I810_PTE_BASE+(i*4));
-                        readl(intel_private.registers+I810_PTE_BASE+(i*4));     /* PCI Posting. */
                 }
+                readl(intel_private.registers+I810_PTE_BASE+((i-1)*4)); /* PCI Posting. */
         }
 
         global_cache_flush();
@@ -989,8 +991,8 @@ static int intel_i915_configure(void)
         if (agp_bridge->driver->needs_scratch_page) {
                 for (i = intel_private.gtt_entries; i < current_size->num_entries; i++) {
                         writel(agp_bridge->scratch_page, intel_private.gtt+i);
-                        readl(intel_private.gtt+i);     /* PCI Posting. */
                 }
+                readl(intel_private.gtt+i-1);   /* PCI Posting. */
         }
 
         global_cache_flush();