agp/intel: Restore valid PTE bit for Sandybridge after bdd3072

In cleaning up the mask functions in bdd3072, the setting of the PTE
valid bit was dropped for Sandybridge.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

1 files changed, 3 insertions, 3 deletions

diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c
index 0c8ff6d8824..6b6760ea243 100644
--- a/drivers/char/agp/intel-gtt.c
+++ b/drivers/char/agp/intel-gtt.c
@@ -1211,13 +1211,13 @@ static void gen6_write_entry(dma_addr_t addr, unsigned int entry,
         u32 pte_flags;
 
         if (type_mask == AGP_USER_UNCACHED_MEMORY)
-                pte_flags = GEN6_PTE_UNCACHED;
+                pte_flags = GEN6_PTE_UNCACHED | I810_PTE_VALID;
         else if (type_mask == AGP_USER_CACHED_MEMORY_LLC_MLC) {
-                pte_flags = GEN6_PTE_LLC;
+                pte_flags = GEN6_PTE_LLC | I810_PTE_VALID;
                 if (gfdt)
                         pte_flags |= GEN6_PTE_GFDT;
         } else { /* set 'normal'/'cached' to LLC by default */
-                pte_flags = GEN6_PTE_LLC_MLC;
+                pte_flags = GEN6_PTE_LLC_MLC | I810_PTE_VALID;
                 if (gfdt)
                         pte_flags |= GEN6_PTE_GFDT;
         }