[Mesa-dev] [PATCH 6/7] i965: Fix incorrect bounds tracking for blit readpixels's GPU access.

[Eric Anholt]

While incorrect, it probably wouldn't affect anyone ever: You'd have to do
an appropriately-formatted readpixels into a PBO, then overwrite the tail
end of the updated area of the PBO with glBufferSubData(), and you
wouldn't get appropriate synchronization.
---
 src/mesa/drivers/dri/i965/intel_pixel_read.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/intel_pixel_read.c b/src/mesa/drivers/dri/i965/intel_pixel_read.c
index 08cb762..0f6d2aa 100644
--- a/src/mesa/drivers/dri/i965/intel_pixel_read.c
+++ b/src/mesa/drivers/dri/i965/intel_pixel_read.c
@@ -127,8 +127,7 @@ do_blit_readpixels(struct gl_context * ctx,
    brw->front_buffer_dirty = dirty;
 
    dst_buffer = intel_bufferobj_buffer(brw, dst,
-				       dst_offset, width * height *
-                                       irb->mt->cpp);
+				       dst_offset, height * dst_stride);
 
    struct intel_mipmap_tree *pbo_mt =
       intel_miptree_create_for_bo(brw,
-- 
1.8.5.1