EXA: Preserve pPixmap->devPrivate.ptr in exaPixmapIsOffscreen_mixed.

Otherwise we may incorrectly clobber it to NULL on repeated PrepareAccess
calls.

1 files changed, 3 insertions, 1 deletions

diff --git a/exa/exa_mixed.c b/exa/exa_mixed.c
index 7ba62ea5f..01f87ba87 100644
--- a/exa/exa_mixed.c
+++ b/exa/exa_mixed.c
@@ -236,14 +236,16 @@ exaPixmapIsOffscreen_mixed(PixmapPtr pPixmap)
     ScreenPtr pScreen = pPixmap->drawable.pScreen;
     ExaScreenPriv(pScreen);
     ExaPixmapPriv(pPixmap);
+    pointer saved_ptr;
     Bool ret;
 
     if (!pExaPixmap->driverPriv)
 	return FALSE;
 
+    saved_ptr = pPixmap->devPrivate.ptr;
     pPixmap->devPrivate.ptr = ExaGetPixmapAddress(pPixmap);
     ret = pExaScr->info->PixmapIsOffscreen(pPixmap);
-    pPixmap->devPrivate.ptr = NULL;
+    pPixmap->devPrivate.ptr = saved_ptr;
 
     return ret;
 }