target/linux/brcm2708/patches-4.4/0197-drm-vc4-Return-an-ERR_PTR-from-BO-creation-instead-o.patch

   1 From d6211c47e6671faf74389dbcbe29454c5997defb Mon Sep 17 00:00:00 2001
   2 From: Eric Anholt <eric@anholt.net>
   3 Date: Mon, 25 Jan 2016 14:13:12 -0800
   4 Subject: [PATCH 197/232] drm/vc4: Return an ERR_PTR from BO creation instead
   5  of NULL.
   6
   7 Fixes igt vc4_create_bo/create-bo-0 by returning -EINVAL from the
   8 ioctl instead of -ENOMEM.
   9
  10 Signed-off-by: Eric Anholt <eric@anholt.net>
  11 ---
  12  drivers/gpu/drm/vc4/vc4_bo.c        | 23 +++++++++++++----------
  13  drivers/gpu/drm/vc4/vc4_gem.c       |  4 ++--
  14  drivers/gpu/drm/vc4/vc4_irq.c       |  2 +-
  15  drivers/gpu/drm/vc4/vc4_render_cl.c |  4 ++--
  16  drivers/gpu/drm/vc4/vc4_validate.c  |  4 ++--
  17  5 files changed, 20 insertions(+), 17 deletions(-)
  18
  19 --- a/drivers/gpu/drm/vc4/vc4_bo.c
  20 +++ b/drivers/gpu/drm/vc4/vc4_bo.c
  21 @@ -213,10 +213,10 @@ struct vc4_bo *vc4_bo_create(struct drm_
  22         size_t size = roundup(unaligned_size, PAGE_SIZE);
  23         struct vc4_dev *vc4 = to_vc4_dev(dev);
  24         struct drm_gem_cma_object *cma_obj;
  25 -       int pass;
  26 +       int pass, ret;
  27
  28         if (size == 0)
  29 -               return NULL;
  30 +               return ERR_PTR(-EINVAL);
  31
  32         /* First, try to get a vc4_bo from the kernel BO cache. */
  33         if (from_cache) {
  34 @@ -247,14 +247,17 @@ struct vc4_bo *vc4_bo_create(struct drm_
  35                          * unreferenced BOs to the cache, and then
  36                          * free the cache.
  37                          */
  38 -                       vc4_wait_for_seqno(dev, vc4->emit_seqno, ~0ull, true);
  39 +                       ret = vc4_wait_for_seqno(dev, vc4->emit_seqno, ~0ull,
  40 +                                                true);
  41 +                       if (ret)
  42 +                               return ERR_PTR(ret);
  43                         vc4_job_handle_completed(vc4);
  44                         vc4_bo_cache_purge(dev);
  45                         break;
  46                 case 3:
  47                         DRM_ERROR("Failed to allocate from CMA:\n");
  48                         vc4_bo_stats_dump(vc4);
  49 -                       return NULL;
  50 +                       return ERR_PTR(-ENOMEM);
  51                 }
  52         }
  53
  54 @@ -276,8 +279,8 @@ int vc4_dumb_create(struct drm_file *fil
  55                 args->size = args->pitch * args->height;
  56
  57         bo = vc4_bo_create(dev, args->size, false);
  58 -       if (!bo)
  59 -               return -ENOMEM;
  60 +       if (IS_ERR(bo))
  61 +               return PTR_ERR(bo);
  62
  63         ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
  64         drm_gem_object_unreference_unlocked(&bo->base.base);
  65 @@ -460,8 +463,8 @@ int vc4_create_bo_ioctl(struct drm_devic
  66          * get zeroed, and that might leak data between users.
  67          */
  68         bo = vc4_bo_create(dev, args->size, false);
  69 -       if (!bo)
  70 -               return -ENOMEM;
  71 +       if (IS_ERR(bo))
  72 +               return PTR_ERR(bo);
  73
  74         ret = drm_gem_handle_create(file_priv, &bo->base.base, &args->handle);
  75         drm_gem_object_unreference_unlocked(&bo->base.base);
  76 @@ -513,8 +516,8 @@ vc4_create_shader_bo_ioctl(struct drm_de
  77         }
  78
  79         bo = vc4_bo_create(dev, args->size, true);
  80 -       if (!bo)
  81 -               return -ENOMEM;
  82 +       if (IS_ERR(bo))
  83 +               return PTR_ERR(bo);
  84
  85         ret = copy_from_user(bo->base.vaddr,
  86                              (void __user *)(uintptr_t)args->data,
  87 --- a/drivers/gpu/drm/vc4/vc4_gem.c
  88 +++ b/drivers/gpu/drm/vc4/vc4_gem.c
  89 @@ -593,9 +593,9 @@ vc4_get_bcl(struct drm_device *dev, stru
  90         }
  91
  92         bo = vc4_bo_create(dev, exec_size, true);
  93 -       if (!bo) {
  94 +       if (IS_ERR(bo)) {
  95                 DRM_ERROR("Couldn't allocate BO for binning\n");
  96 -               ret = PTR_ERR(exec->exec_bo);
  97 +               ret = PTR_ERR(bo);
  98                 goto fail;
  99         }
 100         exec->exec_bo = &bo->base;
 101 --- a/drivers/gpu/drm/vc4/vc4_irq.c
 102 +++ b/drivers/gpu/drm/vc4/vc4_irq.c
 103 @@ -57,7 +57,7 @@ vc4_overflow_mem_work(struct work_struct
 104         struct vc4_bo *bo;
 105
 106         bo = vc4_bo_create(dev, 256 * 1024, true);
 107 -       if (!bo) {
 108 +       if (IS_ERR(bo)) {
 109                 DRM_ERROR("Couldn't allocate binner overflow mem\n");
 110                 return;
 111         }
 112 --- a/drivers/gpu/drm/vc4/vc4_render_cl.c
 113 +++ b/drivers/gpu/drm/vc4/vc4_render_cl.c
 114 @@ -316,8 +316,8 @@ static int vc4_create_rcl_bo(struct drm_
 115         size += xtiles * ytiles * loop_body_size;
 116
 117         setup->rcl = &vc4_bo_create(dev, size, true)->base;
 118 -       if (!setup->rcl)
 119 -               return -ENOMEM;
 120 +       if (IS_ERR(setup->rcl))
 121 +               return PTR_ERR(setup->rcl);
 122         list_add_tail(&to_vc4_bo(&setup->rcl->base)->unref_head,
 123                       &exec->unref_list);
 124
 125 --- a/drivers/gpu/drm/vc4/vc4_validate.c
 126 +++ b/drivers/gpu/drm/vc4/vc4_validate.c
 127 @@ -401,8 +401,8 @@ validate_tile_binning_config(VALIDATE_AR
 128         tile_bo = vc4_bo_create(dev, exec->tile_alloc_offset + tile_alloc_size,
 129                                 true);
 130         exec->tile_bo = &tile_bo->base;
 131 -       if (!exec->tile_bo)
 132 -               return -ENOMEM;
 133 +       if (IS_ERR(exec->tile_bo))
 134 +               return PTR_ERR(exec->tile_bo);
 135         list_add_tail(&tile_bo->unref_head, &exec->unref_list);
 136
 137         /* tile alloc address. */