agp/intel: Use a non-reserved value for the cache field of the PTEs.

I don't know if this is what we'll want to be using long term, we'll see.

Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index df85ed9c753..c3c870bf567 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -296,6 +296,11 @@ static void intel_agp_insert_sg_entries(struct agp_memory *mem,
                                         off_t pg_start, int mask_type)
 {
         int i, j;
+        u32 cache_bits = 0;
+
+        if (agp_bridge->dev->device == PCI_DEVICE_ID_INTEL_SANDYBRIDGE_HB) {
+                cache_bits = I830_PTE_SYSTEM_CACHED;
+        }
 
         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
                 writel(agp_bridge->driver->mask_memory(agp_bridge,