From 010f81f32b9e68b768b3436f98953f1d1c0bf1d4 Mon Sep 17 00:00:00 2001
From: Vinson Lee <vlee@vmware.com>
Date: Sat, 17 Apr 2010 23:40:14 -0700
Subject: st/dri: Check for NULL before dereference and assignment.

---
 src/gallium/state_trackers/dri/drm/dri1.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

(limited to 'src/gallium/state_trackers')

diff --git a/src/gallium/state_trackers/dri/drm/dri1.c b/src/gallium/state_trackers/dri/drm/dri1.c
index bdf2516..e216e46 100644
--- a/src/gallium/state_trackers/dri/drm/dri1.c
+++ b/src/gallium/state_trackers/dri/drm/dri1.c
@@ -89,10 +89,18 @@ dri1_propagate_drawable_change(struct dri_context *ctx)
 {
    __DRIdrawable *dPriv = ctx->dPriv;
    __DRIdrawable *rPriv = ctx->rPriv;
-   struct dri_drawable *draw = dri_drawable(dPriv);
-   struct dri_drawable *read = dri_drawable(rPriv);
+   struct dri_drawable *draw;
+   struct dri_drawable *read;
    boolean flushed = FALSE;
 
+   if (dPriv) {
+      draw = dri_drawable(dPriv);
+   }
+
+   if (rPriv) {
+      read = dri_drawable(rPriv);
+   }
+
    if (dPriv && draw->texture_stamp != dPriv->lastStamp) {
       ctx->st->flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
       flushed = TRUE;
-- 
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