[PATCH 4.5 085/200] drm: Loongson-3 doesnt fully support wc memory

[Greg Kroah-Hartman]

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Huacai Chen <chenhc@xxxxxxxxxx>

commit 221004c66a58949a0f25c937a6789c0839feb530 upstream.

Signed-off-by: Huacai Chen <chenhc@xxxxxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 include/drm/drm_cache.h |    2 ++
 1 file changed, 2 insertions(+)

--- a/include/drm/drm_cache.h
+++ b/include/drm/drm_cache.h
@@ -39,6 +39,8 @@ static inline bool drm_arch_can_wc_memor
 {
 #if defined(CONFIG_PPC) && !defined(CONFIG_NOT_COHERENT_CACHE)
 	return false;
+#elif defined(CONFIG_MIPS) && defined(CONFIG_CPU_LOONGSON3)
+	return false;
 #else
 	return true;
 #endif