From: Dave Airlie <airlied@redhat.com>
Date: Mon, 10 Nov 2008 05:25:27 +0000 (+1000)
Subject: radeon: fix ring tail overflow issue since alignment
X-Git-Tag: libdrm-2.4.3~16^2~14^2~7
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=994f2405030f7f595c4ec6bee524f7c06f27cd7b;p=platform%2Fupstream%2Flibdrm.git

radeon: fix ring tail overflow issue since alignment
---

diff --git a/shared-core/radeon_cp.c b/shared-core/radeon_cp.c
index a087829..285bd4d 100644
--- a/shared-core/radeon_cp.c
+++ b/shared-core/radeon_cp.c
@@ -2863,6 +2863,8 @@ void radeon_commit_ring(drm_radeon_private_t *dev_priv)
 
 		dev_priv->ring.space -= num_p2 * sizeof(u32);
 	}
+
+	dev_priv->ring.tail &= dev_priv->ring.tail_mask;
 		
 	DRM_MEMORYBARRIER();
 	GET_RING_HEAD( dev_priv );