Mesa (mesa_7_7_branch): radeon: fix #25463

[Maciej Cencora]

Module: Mesa
Branch: mesa_7_7_branch
Commit: 8413a3aefaf4968f8b17263826b34baa99c2a907
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8413a3aefaf4968f8b17263826b34baa99c2a907

Author: Maciej Cencora <m.cencora at gmail.com>
Date:   Sat Dec 12 02:02:53 2009 +0100

radeon: fix #25463

This is just a workaroung until we properly fix texture mapping in radeonSpanRenderStart

---

 src/mesa/drivers/dri/radeon/radeon_mipmap_tree.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/radeon/radeon_mipmap_tree.c b/src/mesa/drivers/dri/radeon/radeon_mipmap_tree.c
index 91f0db9..d7b5d71 100644
--- a/src/mesa/drivers/dri/radeon/radeon_mipmap_tree.c
+++ b/src/mesa/drivers/dri/radeon/radeon_mipmap_tree.c
@@ -436,7 +436,10 @@ static void migrate_image_to_miptree(radeon_mipmap_tree *mt,
 		radeon_bo_unmap(image->mt->bo);
 
 		radeon_miptree_unreference(&image->mt);
-	} else {
+	} else if (image->base.Data) {
+		/* This condition should be removed, it's here to workaround
+		 * a segfault when mapping textures during software fallbacks.
+		 */
 		const uint32_t srcrowstride = _mesa_format_row_stride(image->base.TexFormat, image->base.Width);
 		uint32_t rows = image->base.Height * image->base.Depth;