drm/radeon: Only prompt for enabling PAT when we'd allow write-combining

No use bothering users about this for whom we disable write-combining for
other reasons anyway.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/gpu/drm/radeon/radeon_object.c b/drivers/gpu/drm/radeon/radeon_object.c
index dda2ecfbf056..84d45633d28c 100644
--- a/drivers/gpu/drm/radeon/radeon_object.c
+++ b/drivers/gpu/drm/radeon/radeon_object.c
@@ -241,8 +241,9 @@ int radeon_bo_create(struct radeon_device *rdev,
 #warning Please enable CONFIG_MTRR and CONFIG_X86_PAT for better performance \
          thanks to write-combining
 
-        DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
-                      "better performance thanks to write-combining\n");
+        if (bo->flags & RADEON_GEM_GTT_WC)
+                DRM_INFO_ONCE("Please enable CONFIG_MTRR and CONFIG_X86_PAT for "
+                              "better performance thanks to write-combining\n");
         bo->flags &= ~(RADEON_GEM_GTT_WC | RADEON_GEM_GTT_UC);
 #endif