xserver: Branch 'master'

[Keith Packard]

Rebased ref, commits from common ancestor:
commit 4020cab88f5cf3164fc83cf912f94f288aa5a45d
Author: Michel Dänzer <michel.daenzer at amd.com>
Date:   Wed Aug 10 11:36:16 2011 +0200

    EXA/mixed: Update sys_pitch in MPH even when there's no system memory copy.
    
    Otherwise sys_pitch will be stale when a system memory copy is allocated.
    
    Fixes https://bugs.freedesktop.org/show_bug.cgi?id=38322 and a crash when
    unlocking the screen with xscreensaver, reported by Janne Huttunen.
    
    Signed-off-by: Michel Dänzer <michel.daenzer at amd.com>
    Tested-by: Janne Huttunen <jahuttun at gmail.com>
    Tested-by: Jan Kriho <Erbureth at gmail.com>
    Signed-off-by: Keith Packard <keithp at keithp.com>

diff --git a/exa/exa_mixed.c b/exa/exa_mixed.c
index 58645ae..0b1a4a4 100644
--- a/exa/exa_mixed.c
+++ b/exa/exa_mixed.c
@@ -186,17 +186,20 @@ exaModifyPixmapHeader_mixed(PixmapPtr pPixmap, int width, int height, int depth,
         }
 
 	/* Need to re-create system copy if there's also a GPU copy */
-	if (has_gpu_copy && pExaPixmap->sys_ptr) {
-	    free(pExaPixmap->sys_ptr);
-	    pExaPixmap->sys_ptr = NULL;
-	    pExaPixmap->sys_pitch = PixmapBytePad(width, depth);
-	    DamageUnregister(&pPixmap->drawable, pExaPixmap->pDamage);
-	    DamageDestroy(pExaPixmap->pDamage);
-	    pExaPixmap->pDamage = NULL;
-	    RegionEmpty(&pExaPixmap->validSys);
+	if (has_gpu_copy) {
+	    if (pExaPixmap->sys_ptr) {
+		free(pExaPixmap->sys_ptr);
+		pExaPixmap->sys_ptr = NULL;
+		DamageUnregister(&pPixmap->drawable, pExaPixmap->pDamage);
+		DamageDestroy(pExaPixmap->pDamage);
+		pExaPixmap->pDamage = NULL;
+		RegionEmpty(&pExaPixmap->validSys);
 
-	    if (pExaScr->deferred_mixed_pixmap == pPixmap)
-		pExaScr->deferred_mixed_pixmap = NULL;
+		if (pExaScr->deferred_mixed_pixmap == pPixmap)
+		    pExaScr->deferred_mixed_pixmap = NULL;
+	    }
+
+	    pExaPixmap->sys_pitch = PixmapBytePad(width, depth);
 	}
     }