drm/ttm: wrap tt destroy. (v2)

All places this was called was using bo->ttm either direct
or indirectly.

v2: move to ttm_bo
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200915024007.67163-3-airlied@gmail.com

drivers/gpu/drm/ttm/ttm_bo.c

@@ -301,10 +301,8 @@ static int ttm_bo_handle_move_mem(struct ttm_buffer_object *bo,
 
 out_err:
 	new_man = ttm_manager_type(bdev, bo->mem.mem_type);
-	if (!new_man->use_tt) {
-		ttm_tt_destroy(bdev, bo->ttm);
-		bo->ttm = NULL;
-	}
+	if (!new_man->use_tt)
+		ttm_bo_tt_destroy(bo);
 
 	return ret;
 }
@@ -322,8 +320,7 @@ static void ttm_bo_cleanup_memtype_use(struct ttm_buffer_object *bo)
 	if (bo->bdev->driver->move_notify)
 		bo->bdev->driver->move_notify(bo, false, NULL);
 
-	ttm_tt_destroy(bo->bdev, bo->ttm);
-	bo->ttm = NULL;
+	ttm_bo_tt_destroy(bo);
 	ttm_resource_free(bo, &bo->mem);
 }
 
@@ -1613,3 +1610,9 @@ void ttm_bo_swapout_all(void)
 	while (ttm_bo_swapout(&ttm_bo_glob, &ctx) == 0);
 }
 EXPORT_SYMBOL(ttm_bo_swapout_all);
+
+void ttm_bo_tt_destroy(struct ttm_buffer_object *bo)
+{
+	ttm_tt_destroy(bo->bdev, bo->ttm);
+	bo->ttm = NULL;
+}

drivers/gpu/drm/ttm/ttm_bo_util.c

@@ -297,10 +297,8 @@ int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
 	*old_mem = *new_mem;
 	new_mem->mm_node = NULL;
 
-	if (!man->use_tt) {
-		ttm_tt_destroy(bdev, ttm);
-		bo->ttm = NULL;
-	}
+	if (!man->use_tt)
+		ttm_bo_tt_destroy(bo);
 
 out1:
 	ttm_resource_iounmap(bdev, old_mem, new_iomap);
@@ -542,10 +540,8 @@ int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
 		if (ret)
 			return ret;
 
-		if (!man->use_tt) {
-			ttm_tt_destroy(bdev, bo->ttm);
-			bo->ttm = NULL;
-		}
+		if (!man->use_tt)
+			ttm_bo_tt_destroy(bo);
 		ttm_bo_free_old_node(bo);
 	} else {
 		/**
@@ -665,10 +661,8 @@ int ttm_bo_pipeline_move(struct ttm_buffer_object *bo,
 		if (ret)
 			return ret;
 
-		if (!to->use_tt) {
-			ttm_tt_destroy(bdev, bo->ttm);
-			bo->ttm = NULL;
-		}
+		if (!to->use_tt)
+			ttm_bo_tt_destroy(bo);
 		ttm_bo_free_old_node(bo);
 	}
 

include/drm/ttm/ttm_bo_driver.h

@@ -684,6 +684,11 @@ int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo);
  */
 pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp);
 
+/**
+ * ttm_bo_tt_destroy.
+ */
+void ttm_bo_tt_destroy(struct ttm_buffer_object *bo);
+
 /**
  * ttm_range_man_init
  *