From 29649ddedee6b07b922c99233b8afc7c3a1db66f Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Mon, 4 Aug 2008 14:56:08 +1000
Subject: radeon: don't use ring if cp not going

---
 linux-core/radeon_buffer.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/linux-core/radeon_buffer.c b/linux-core/radeon_buffer.c
index e9ba11d4..a4ac38c1 100644
--- a/linux-core/radeon_buffer.c
+++ b/linux-core/radeon_buffer.c
@@ -55,10 +55,14 @@ int radeon_invalidate_caches(struct drm_device * dev, uint64_t flags)
 	drm_radeon_private_t *dev_priv = dev->dev_private;
 	RING_LOCALS;
 
+	if (!dev_priv->cp_running)
+		return 0;
+
 	BEGIN_RING(4);
 	RADEON_FLUSH_CACHE();
 	RADEON_FLUSH_ZCACHE();
 	ADVANCE_RING();
+	COMMIT_RING();
 	return 0;
 }
 
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