[Mesa-dev] [PATCH 4/4] i965: Use intel_bufferobj_buffer() wrapper in image surface state setup.

[Francisco Jerez]

Instead of directly using intel_obj->buffer.  Among other things
intel_bufferobj_buffer() will update intel_buffer_object::
gpu_active_start/end, which are used by glBufferSubData() to decide
which path to take.  Fixes a failure in the Piglit
ARB_shader_image_load_store-host-mem-barrier Buffer Update/WaW tests,
which could be reproduced with a non-standard glGetTexSubImage
implementation (see bug report).

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105351
Reported-by: Nanley Chery <nanleychery at gmail.com>
Cc: mesa-stable at lists.freedesktop.org
---
 src/mesa/drivers/dri/i965/brw_wm_surface_state.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 2ab15af793a..5d4c84bb55a 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -1510,14 +1510,16 @@ update_image_surface(struct brw_context *brw,
       const unsigned format = get_image_format(brw, u->_ActualFormat, access);
 
       if (obj->Target == GL_TEXTURE_BUFFER) {
-         struct intel_buffer_object *intel_obj =
-            intel_buffer_object(obj->BufferObject);
          const unsigned texel_size = (format == ISL_FORMAT_RAW ? 1 :
                                       _mesa_get_format_bytes(u->_ActualFormat));
          const unsigned buffer_size = buffer_texture_range_size(brw, obj);
+         struct brw_bo *const bo = !obj->BufferObject ? NULL :
+            intel_bufferobj_buffer(brw, intel_buffer_object(obj->BufferObject),
+                                   obj->BufferOffset, buffer_size,
+                                   access != GL_READ_ONLY);
 
          brw_emit_buffer_surface_state(
-            brw, surf_offset, intel_obj->buffer, obj->BufferOffset,
+            brw, surf_offset, bo, obj->BufferOffset,
             format, buffer_size, texel_size,
             access != GL_READ_ONLY ? RELOC_WRITE : 0);
 
-- 
2.16.1