drm/vmwgfx: Use struct_size() helper
Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.
This code was detected with the help of Coccinelle and, audited and
fixed manually.
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Roland Scheidegger <sroland@vmware.com>
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
index 126f93c..3914bfe 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
@@ -1969,7 +1969,7 @@ static int vmw_surface_dirty_alloc(struct vmw_resource *res)
num_mip = 1;
num_subres = num_layers * num_mip;
- dirty_size = sizeof(*dirty) + num_subres * sizeof(dirty->boxes[0]);
+ dirty_size = struct_size(dirty, boxes, num_subres);
acc_size = ttm_round_pot(dirty_size);
ret = ttm_mem_global_alloc(vmw_mem_glob(res->dev_priv),
acc_size, &ctx);