Accessing a pixmap in fallback if the prepare_access() callback failed

is verboten

So don't do it. Treat it the same as every other prepare access call in
uxa.  This patch sent upstream.

ok matthieu@

1 files changed, 4 insertions, 3 deletions

diff --git a/driver/xf86-video-intel/uxa/uxa.c b/driver/xf86-video-intel/uxa/uxa.c
index b51a282d4..d63e4d6a1 100644
--- a/driver/xf86-video-intel/uxa/uxa.c
+++ b/driver/xf86-video-intel/uxa/uxa.c
@@ -247,9 +247,10 @@ uxa_validate_gc (GCPtr pGC, unsigned long changes, DrawablePtr pDrawable)
 	/* We can't inline stipple handling like we do for GCTile because it sets
 	 * fbgc privates.
 	 */
-	uxa_prepare_access(&pGC->stipple->drawable, UXA_ACCESS_RW);
-	fbValidateGC (pGC, changes, pDrawable);
-	uxa_finish_access(&pGC->stipple->drawable);
+	if (uxa_prepare_access(&pGC->stipple->drawable, UXA_ACCESS_RW)) {
+	    fbValidateGC (pGC, changes, pDrawable);
+	    uxa_finish_access(&pGC->stipple->drawable);
+	}
     } else {
 	fbValidateGC (pGC, changes, pDrawable);
     }