target/linux/brcm2708/patches-4.4/0194-drm-vc4-Validate-that-WAIT_BO-padding-is-cleared.patch

   1 From 12ddf64c85deb1d1261bdde36c128cd1a178a4d7 Mon Sep 17 00:00:00 2001
   2 From: Eric Anholt <eric@anholt.net>
   3 Date: Mon, 25 Jan 2016 13:05:00 -0800
   4 Subject: [PATCH 194/304] drm/vc4: Validate that WAIT_BO padding is cleared.
   5
   6 This is ABI future-proofing if we ever want to extend the pad to mean
   7 something.
   8
   9 Signed-off-by: Eric Anholt <eric@anholt.net>
  10 ---
  11  drivers/gpu/drm/vc4/vc4_gem.c | 3 +++
  12  1 file changed, 3 insertions(+)
  13
  14 --- a/drivers/gpu/drm/vc4/vc4_gem.c
  15 +++ b/drivers/gpu/drm/vc4/vc4_gem.c
  16 @@ -761,6 +761,9 @@ vc4_wait_bo_ioctl(struct drm_device *dev
  17         struct drm_gem_object *gem_obj;
  18         struct vc4_bo *bo;
  19
  20 +       if (args->pad != 0)
  21 +               return -EINVAL;
  22 +
  23         gem_obj = drm_gem_object_lookup(dev, file_priv, args->handle);
  24         if (!gem_obj) {
  25                 DRM_ERROR("Failed to look up GEM BO %d\n", args->handle);