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>
(cherry picked from commit ff2cbf9e0ca0ee46a15add1a42cd48705c84e0de)

1 files changed, 8 insertions, 7 deletions

diff --git a/src/mesa/drivers/dri/i915/intel_buffer_objects.c b/src/mesa/drivers/dri/i915/intel_buffer_objects.c
index 345db6dfe0..21403150d7 100644
--- 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)
    if (obj->Pointer)
       intel_bufferobj_unmap(ctx, obj);
 
-   free(intel_obj->sys_buffer);
+   _mesa_align_free(intel_obj->sys_buffer);
 
    drm_intel_bo_unreference(intel_obj->buffer);
    free(intel_obj);
@@ -129,7 +129,7 @@ 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) {
@@ -137,7 +137,8 @@ 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);
@@ -188,7 +189,7 @@ 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;
    }
 
@@ -295,7 +296,7 @@ intel_bufferobj_map_range(struct gl_context * ctx,
 	 return obj->Pointer;
       }
 
-      free(intel_obj->sys_buffer);
+      _mesa_align_free(intel_obj->sys_buffer);
       intel_obj->sys_buffer = NULL;
    }
 
@@ -478,7 +479,7 @@ 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;
    }
@@ -663,7 +664,7 @@ 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;