From 8fd250e5e4c2016614b82e2d653b7fbf8a3a5b99 Mon Sep 17 00:00:00 2001
From: Eric Anholt <anholt@freebsd.org>
Date: Wed, 24 Aug 2005 21:51:28 +0000
Subject: [PATCH] Bugzilla #4089: Fix crashes in !EXA_OFFSCREEN_PIXMAPS case by
 not trying to     do migration when the EXA pixmap private is NULL.

---
 exa/exa.c                      | 7 +++++++
 exa/exa_accel.c                | 7 +++++++
 exa/exa_migration.c            | 7 +++++++
 hw/xfree86/exa/exa.c           | 7 +++++++
 hw/xfree86/exa/exa_accel.c     | 7 +++++++
 hw/xfree86/exa/exa_migration.c | 7 +++++++
 6 files changed, 42 insertions(+)

diff --git a/exa/exa.c b/exa/exa.c
index 5ba8af356..4d25d5a92 100644
--- a/exa/exa.c
+++ b/exa/exa.c
@@ -264,6 +264,10 @@ exaPixmapUseScreen (PixmapPtr pPixmap)
     ExaPixmapPriv (pPixmap);
 
     STRACE;
+
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
@@ -287,6 +291,9 @@ exaPixmapUseMemory (PixmapPtr pPixmap)
 {
     ExaPixmapPriv (pPixmap);
 
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
diff --git a/exa/exa_accel.c b/exa/exa_accel.c
index 5ba8af356..4d25d5a92 100644
--- a/exa/exa_accel.c
+++ b/exa/exa_accel.c
@@ -264,6 +264,10 @@ exaPixmapUseScreen (PixmapPtr pPixmap)
     ExaPixmapPriv (pPixmap);
 
     STRACE;
+
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
@@ -287,6 +291,9 @@ exaPixmapUseMemory (PixmapPtr pPixmap)
 {
     ExaPixmapPriv (pPixmap);
 
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
diff --git a/exa/exa_migration.c b/exa/exa_migration.c
index 5ba8af356..4d25d5a92 100644
--- a/exa/exa_migration.c
+++ b/exa/exa_migration.c
@@ -264,6 +264,10 @@ exaPixmapUseScreen (PixmapPtr pPixmap)
     ExaPixmapPriv (pPixmap);
 
     STRACE;
+
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
@@ -287,6 +291,9 @@ exaPixmapUseMemory (PixmapPtr pPixmap)
 {
     ExaPixmapPriv (pPixmap);
 
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
diff --git a/hw/xfree86/exa/exa.c b/hw/xfree86/exa/exa.c
index 5ba8af356..4d25d5a92 100644
--- a/hw/xfree86/exa/exa.c
+++ b/hw/xfree86/exa/exa.c
@@ -264,6 +264,10 @@ exaPixmapUseScreen (PixmapPtr pPixmap)
     ExaPixmapPriv (pPixmap);
 
     STRACE;
+
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
@@ -287,6 +291,9 @@ exaPixmapUseMemory (PixmapPtr pPixmap)
 {
     ExaPixmapPriv (pPixmap);
 
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
diff --git a/hw/xfree86/exa/exa_accel.c b/hw/xfree86/exa/exa_accel.c
index 5ba8af356..4d25d5a92 100644
--- a/hw/xfree86/exa/exa_accel.c
+++ b/hw/xfree86/exa/exa_accel.c
@@ -264,6 +264,10 @@ exaPixmapUseScreen (PixmapPtr pPixmap)
     ExaPixmapPriv (pPixmap);
 
     STRACE;
+
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
@@ -287,6 +291,9 @@ exaPixmapUseMemory (PixmapPtr pPixmap)
 {
     ExaPixmapPriv (pPixmap);
 
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
diff --git a/hw/xfree86/exa/exa_migration.c b/hw/xfree86/exa/exa_migration.c
index 5ba8af356..4d25d5a92 100644
--- a/hw/xfree86/exa/exa_migration.c
+++ b/hw/xfree86/exa/exa_migration.c
@@ -264,6 +264,10 @@ exaPixmapUseScreen (PixmapPtr pPixmap)
     ExaPixmapPriv (pPixmap);
 
     STRACE;
+
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;
 
@@ -287,6 +291,9 @@ exaPixmapUseMemory (PixmapPtr pPixmap)
 {
     ExaPixmapPriv (pPixmap);
 
+    if (pExaPixmap == NULL)
+	return;
+
     if (pExaPixmap->score == EXA_PIXMAP_SCORE_PINNED)
 	return;