2 files changed, 10 insertions, 3 deletions

diff --git a/drivers/char/agp/agp.h b/drivers/char/agp/agp.h
index c1fe013c64f3..b4af87c6f9c8 100644
--- a/drivers/char/agp/agp.h
+++ b/drivers/char/agp/agp.h
@@ -143,6 +143,7 @@ struct agp_bridge_data {
         char major_version;
         char minor_version;
         struct list_head list;
+        u32 apbase_config;
 };
 
 #define KB(x)   ((x) * 1024)
diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 51266d6b4d78..1f7d415f432c 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -1047,9 +1047,15 @@ static int intel_845_configure(void)
         /* aperture size */
         pci_write_config_byte(agp_bridge->dev, INTEL_APSIZE, current_size->size_value);
 
-        /* address to map to */
-        pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
-        agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+        if (agp_bridge->apbase_config != 0) {
+                pci_write_config_dword(agp_bridge->dev, AGP_APBASE,
+                                       agp_bridge->apbase_config);
+        } else {
+                /* address to map to */
+                pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
+                agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
+                agp_bridge->apbase_config = temp;
+        }
 
         /* attbase - aperture base */
         pci_write_config_dword(agp_bridge->dev, INTEL_ATTBASE, agp_bridge->gatt_bus_addr);