diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_dma.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c index fa5c276b7992..ee7775c55450 100644 --- a/drivers/gpu/drm/i915/i915_dma.c +++ b/drivers/gpu/drm/i915/i915_dma.c @@ -43,6 +43,7 @@ #include <linux/slab.h> #include <linux/module.h> #include <acpi/video.h> +#include <asm/pat.h> static void i915_write_hws_pga(struct drm_device *dev) { @@ -1918,6 +1919,11 @@ static void i915_mtrr_setup(struct drm_i915_private *dev_priv, unsigned long base, unsigned long size) { +#if defined(CONFIG_X86_PAT) + if (cpu_has_pat) + return; +#endif + /* Set up a WC MTRR for non-PAT systems. This is more common than * one would think, because the kernel disables PAT on first * generation Core chips because WC PAT gets overridden by a UC |