radeon: fix ring tail overflow issue since alignment

1 files changed, 2 insertions, 0 deletions

diff --git a/shared-core/radeon_cp.c b/shared-core/radeon_cp.c
index a087829e..285bd4d7 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 );