linux-kernel - [PATCH 3.19.y-ckt 51/66] drm: Loongson-3 doesn't fully support wc memory

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Message-Id: <1461702297-7792-52-git-send-email-kamal@canonical.com>
Date:	Tue, 26 Apr 2016 13:24:42 -0700
From:	Kamal Mostafa <kamal@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Huacai Chen <chenhc@...ote.com>, Dave Airlie <airlied@...hat.com>,
	Kamal Mostafa <kamal@...onical.com>
Subject: [PATCH 3.19.y-ckt 51/66] drm: Loongson-3 doesn't fully support wc memory

3.19.8-ckt20 -stable review patch.  If anyone has any objections, please let me know.

---8<------------------------------------------------------------

From: Huacai Chen <chenhc@...ote.com>

commit 221004c66a58949a0f25c937a6789c0839feb530 upstream.

Signed-off-by: Huacai Chen <chenhc@...ote.com>
Reviewed-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Kamal Mostafa <kamal@...onical.com>
---
 include/drm/drm_cache.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/drm/drm_cache.h b/include/drm/drm_cache.h
index 461a055..cebecff 100644
--- a/include/drm/drm_cache.h
+++ b/include/drm/drm_cache.h
@@ -39,6 +39,8 @@ static inline bool drm_arch_can_wc_memory(void)
 {
 #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
-- 
2.7.4