Mesa (master): dri/nouveau: Don't try to map a non-existent teximage.

[Francisco Jerez]

Module: Mesa
Branch: master
Commit: 7432ffbdfa52b51b720bdde5cd50c497862b8806
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=7432ffbdfa52b51b720bdde5cd50c497862b8806

Author: Francisco Jerez <currojerez at riseup.net>
Date:   Tue Feb 23 16:31:42 2010 +0100

dri/nouveau: Don't try to map a non-existent teximage.

---

 src/mesa/drivers/dri/nouveau/nouveau_texture.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/src/mesa/drivers/dri/nouveau/nouveau_texture.c b/src/mesa/drivers/dri/nouveau/nouveau_texture.c
index 32603ab..5b78804 100644
--- a/src/mesa/drivers/dri/nouveau/nouveau_texture.c
+++ b/src/mesa/drivers/dri/nouveau/nouveau_texture.c
@@ -81,10 +81,12 @@ nouveau_teximage_map(GLcontext *ctx, struct gl_texture_image *ti)
 	struct nouveau_surface *s = &to_nouveau_teximage(ti)->surface;
 	int ret;
 
-	ret = nouveau_bo_map(s->bo, NOUVEAU_BO_RDWR);
-	assert(!ret);
+	if (s->bo) {
+		ret = nouveau_bo_map(s->bo, NOUVEAU_BO_RDWR);
+		assert(!ret);
 
-	ti->Data = s->bo->map;
+		ti->Data = s->bo->map;
+	}
 }
 
 static void
@@ -92,7 +94,8 @@ nouveau_teximage_unmap(GLcontext *ctx, struct gl_texture_image *ti)
 {
 	struct nouveau_surface *s = &to_nouveau_teximage(ti)->surface;
 
-	nouveau_bo_unmap(s->bo);
+	if (s->bo)
+		nouveau_bo_unmap(s->bo);
 	ti->Data = NULL;
 }