i915: Allocate the sys_buffer using _mesa_align_malloc

Though it won't matter on Linux, use _mesa_align_free to release it.
Since i965 doesn't have sys_buffer, I overlooked this in the
GL_ARB_map_buffer_alignment work a few months ago.  Fixes i915 (and
presumably i830) regressions in ARB_map_buffer_range tests and the
failure in arb_map_buffer_alignment-sanity_test.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=74960
Cc: "10.1" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>

diff --git a/src/mesa/drivers/dri/i915/intel_buffer_objects.c b/src/mesa/drivers/dri/i915/intel_buffer_objects.c
index b93dd20..3da901b 100644 (file)
--- a/src/mesa/drivers/dri/i915/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/i915/intel_buffer_objects.c
@@ -96,7 +96,7 @@ intel_bufferobj_free(struct gl_context * ctx, struct gl_buffer_object *obj)
     */
    _mesa_buffer_unmap_all_mappings(ctx, obj);
 
-   free(intel_obj->sys_buffer);
+   _mesa_align_free(intel_obj->sys_buffer);
 
    drm_intel_bo_unreference(intel_obj->buffer);
    free(intel_obj);
@@ -133,7 +133,7 @@ intel_bufferobj_data(struct gl_context * ctx,
    if (intel_obj->buffer != NULL)
       release_buffer(intel_obj);
 
-   free(intel_obj->sys_buffer);
+   _mesa_align_free(intel_obj->sys_buffer);
    intel_obj->sys_buffer = NULL;
 
    if (size != 0) {
@@ -141,7 +141,8 @@ intel_bufferobj_data(struct gl_context * ctx,
        * contents anyway.
        */
       if (target == GL_ARRAY_BUFFER || target == GL_ELEMENT_ARRAY_BUFFER) {
-        intel_obj->sys_buffer = malloc(size);
+        intel_obj->sys_buffer =
+            _mesa_align_malloc(size, ctx->Const.MinMapBufferAlignment);
         if (intel_obj->sys_buffer != NULL) {
            if (data != NULL)
               memcpy(intel_obj->sys_buffer, data, size);
@@ -192,7 +193,7 @@ intel_bufferobj_subdata(struct gl_context * ctx,
         return;
       }
 
-      free(intel_obj->sys_buffer);
+      _mesa_align_free(intel_obj->sys_buffer);
       intel_obj->sys_buffer = NULL;
    }
 
@@ -300,7 +301,7 @@ intel_bufferobj_map_range(struct gl_context * ctx,
         return obj->Mappings[index].Pointer;
       }
 
-      free(intel_obj->sys_buffer);
+      _mesa_align_free(intel_obj->sys_buffer);
       intel_obj->sys_buffer = NULL;
    }
 
@@ -489,7 +490,7 @@ intel_bufferobj_buffer(struct intel_context *intel,
                           0, intel_obj->Base.Size,
                           intel_obj->sys_buffer);
 
-      free(intel_obj->sys_buffer);
+      _mesa_align_free(intel_obj->sys_buffer);
       intel_obj->sys_buffer = NULL;
       intel_obj->offset = 0;
    }
@@ -676,7 +677,7 @@ intel_buffer_object_purgeable(struct gl_context * ctx,
       return intel_buffer_purgeable(intel_obj->buffer);
 
    if (option == GL_RELEASED_APPLE) {
-      free(intel_obj->sys_buffer);
+      _mesa_align_free(intel_obj->sys_buffer);
       intel_obj->sys_buffer = NULL;
 
       return GL_RELEASED_APPLE;