target/linux/brcm2708/patches-4.4/0112-drm-Put-an-optional-field-in-the-driver-struct-for-G.patch

   1 From 51c3910db1015b46ce2a3973cf10ba8e61514821 Mon Sep 17 00:00:00 2001
   2 From: Eric Anholt <eric@anholt.net>
   3 Date: Wed, 19 Nov 2014 12:06:38 -0800
   4 Subject: [PATCH 112/381] drm: Put an optional field in the driver struct for
   5  GEM obj struct size.
   6
   7 This allows a driver to derive from the CMA object without copying all
   8 of the code.
   9
  10 Signed-off-by: Eric Anholt <eric@anholt.net>
  11 ---
  12  drivers/gpu/drm/drm_gem_cma_helper.c | 5 ++++-
  13  include/drm/drmP.h                   | 1 +
  14  2 files changed, 5 insertions(+), 1 deletion(-)
  15
  16 --- a/drivers/gpu/drm/drm_gem_cma_helper.c
  17 +++ b/drivers/gpu/drm/drm_gem_cma_helper.c
  18 @@ -58,8 +58,11 @@ __drm_gem_cma_create(struct drm_device *
  19         struct drm_gem_cma_object *cma_obj;
  20         struct drm_gem_object *gem_obj;
  21         int ret;
  22 +       size_t obj_size = (drm->driver->gem_obj_size ?
  23 +                          drm->driver->gem_obj_size :
  24 +                          sizeof(*cma_obj));
  25
  26 -       cma_obj = kzalloc(sizeof(*cma_obj), GFP_KERNEL);
  27 +       cma_obj = kzalloc(obj_size, GFP_KERNEL);
  28         if (!cma_obj)
  29                 return ERR_PTR(-ENOMEM);
  30
  31 --- a/include/drm/drmP.h
  32 +++ b/include/drm/drmP.h
  33 @@ -639,6 +639,7 @@ struct drm_driver {
  34
  35         u32 driver_features;
  36         int dev_priv_size;
  37 +       size_t gem_obj_size;
  38         const struct drm_ioctl_desc *ioctls;
  39         int num_ioctls;
  40         const struct file_operations *fops;