From c0ff117d3e19e14829a21d89673e03f9d6389043 Mon Sep 17 00:00:00 2001
From: Jan de Groot <jgc@archlinux.org>
Date: Thu, 22 Nov 2012 15:04:42 +0100
Subject: [PATCH] Disable UploadToScreen and DownloadFromScreen. These
 functions use invalid pointers, causing crashes. As the
 driver is technically unmaintained, it's better to rely on
 software fallback than trying to fix the driver
 implementation.

---
 src/sis300_accel.c | 2 ++
 src/sis310_accel.c | 2 ++
 src/sis_accel.c    | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/src/sis300_accel.c b/src/sis300_accel.c
index af0527d..2162d76 100644
--- a/src/sis300_accel.c
+++ b/src/sis300_accel.c
@@ -1273,9 +1273,11 @@ SiS300AccelInit(ScreenPtr pScreen)
 
 		 /* Composite not supported */
 
+#if 0
 		 /* Upload, download to/from Screen */
 		 pSiS->EXADriverPtr->UploadToScreen = SiSUploadToScreen;
 		 pSiS->EXADriverPtr->DownloadFromScreen = SiSDownloadFromScreen;
+#endif
 
 	      } else {
 
diff --git a/src/sis310_accel.c b/src/sis310_accel.c
index 1a6f639..20106ce 100644
--- a/src/sis310_accel.c
+++ b/src/sis310_accel.c
@@ -2303,9 +2303,11 @@ SiS315AccelInit(ScreenPtr pScreen)
 	      }
 #endif
 
+#if 0
 	      /* Upload, download to/from Screen */
 	      pSiS->EXADriverPtr->UploadToScreen = SiSUploadToScreen;
 	      pSiS->EXADriverPtr->DownloadFromScreen = SiSDownloadFromScreen;
+#endif
 
 	   }
 #endif
diff --git a/src/sis_accel.c b/src/sis_accel.c
index c2c24c7..bb08296 100644
--- a/src/sis_accel.c
+++ b/src/sis_accel.c
@@ -801,9 +801,11 @@ SiSAccelInit(ScreenPtr pScreen)
 
 	  /* Composite not supported */
 
+#if 0
 	  /* Upload, download to/from Screen */
 	  pSiS->EXADriverPtr->UploadToScreen = SiSUploadToScreen;
 	  pSiS->EXADriverPtr->DownloadFromScreen = SiSDownloadFromScreen;
+#endif
 
        }
 #endif /* EXA */
-- 
1.8.0