From 8d0f56708292ca5c256ee3b7187d124afee81d93 Mon Sep 17 00:00:00 2001 From: Zhenyu Wang Date: Tue, 2 Nov 2010 17:30:47 +0800 Subject: [PATCH] agp/intel: restore cache behavior on sandybridge This restores cache behavior for default AGP_USER_MEMORY as uncached, and leave default AGP_USER_CACHED_MEMORY as LLC only. I've seen different cache behavior on one sandybridge desktop CPU vs. another mobile CPU. Until we figure out how to detect the real cache config, restore back to the original behavior now. Signed-off-by: Zhenyu Wang Cc: stable@kernel.org Signed-off-by: Chris Wilson --- drivers/char/agp/intel-gtt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 6b6760ea2435..791216d33ed0 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -1210,7 +1210,7 @@ static void gen6_write_entry(dma_addr_t addr, unsigned int entry, unsigned int gfdt = flags & AGP_USER_CACHED_MEMORY_GFDT; u32 pte_flags; - if (type_mask == AGP_USER_UNCACHED_MEMORY) + if (type_mask == AGP_USER_MEMORY) pte_flags = GEN6_PTE_UNCACHED | I810_PTE_VALID; else if (type_mask == AGP_USER_CACHED_MEMORY_LLC_MLC) { pte_flags = GEN6_PTE_LLC | I810_PTE_VALID; -- GitLab