Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> writes:
> For cleanliness, i915_error_object_create() was written to handle the
> NULL pointer in a central location. The macro that wrapped it and passed
> it a num_pages to use, was not safe. As we now never limit the num_pages
> to use (we did so at one point to only capture the first page of the
> context), we can remove the redundant macro and be NULL safe again.
>
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
> Cc: John Harrison <John.C.Harrison@xxxxxxxxx>
Reviewed-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/i915_gpu_error.c | 25 ++++++++++---------------
> 1 file changed, 10 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
> index 6d280c07..726e6b1 100644
> --- a/drivers/gpu/drm/i915/i915_gpu_error.c
> +++ b/drivers/gpu/drm/i915/i915_gpu_error.c
> @@ -558,12 +558,12 @@ static void i915_error_state_free(struct kref *error_ref)
> }
>
> static struct drm_i915_error_object *
> -i915_error_object_create_sized(struct drm_i915_private *dev_priv,
> - struct drm_i915_gem_object *src,
> - struct i915_address_space *vm,
> - int num_pages)
> +i915_error_object_create(struct drm_i915_private *dev_priv,
> + struct drm_i915_gem_object *src,
> + struct i915_address_space *vm)
> {
> struct drm_i915_error_object *dst;
> + int num_pages;
> bool use_ggtt;
> int i = 0;
> u32 reloc_offset;
> @@ -571,6 +571,8 @@ i915_error_object_create_sized(struct drm_i915_private *dev_priv,
> if (src == NULL || src->pages == NULL)
> return NULL;
>
> + num_pages = src->base.size >> PAGE_SHIFT;
> +
> dst = kmalloc(sizeof(*dst) + num_pages * sizeof(u32 *), GFP_ATOMIC);
> if (dst == NULL)
> return NULL;
> @@ -649,13 +651,8 @@ unwind:
> kfree(dst);
> return NULL;
> }
> -#define i915_error_object_create(dev_priv, src, vm) \
> - i915_error_object_create_sized((dev_priv), (src), (vm), \
> - (src)->base.size>>PAGE_SHIFT)
> -
> #define i915_error_ggtt_object_create(dev_priv, src) \
> - i915_error_object_create_sized((dev_priv), (src), &(dev_priv)->gtt.base, \
> - (src)->base.size>>PAGE_SHIFT)
> + i915_error_object_create((dev_priv), (src), &(dev_priv)->gtt.base)
>
> static void capture_bo(struct drm_i915_error_buffer *err,
> struct i915_vma *vma)
> @@ -1004,8 +1001,7 @@ static void i915_gem_record_rings(struct drm_device *dev,
> request->batch_obj,
> vm);
>
> - if (HAS_BROKEN_CS_TLB(dev_priv->dev) &&
> - ring->scratch.obj)
> + if (HAS_BROKEN_CS_TLB(dev_priv->dev))
> error->ring[i].wa_batchbuffer =
> i915_error_ggtt_object_create(dev_priv,
> ring->scratch.obj);
> @@ -1027,9 +1023,8 @@ static void i915_gem_record_rings(struct drm_device *dev,
> error->ring[i].ringbuffer =
> i915_error_ggtt_object_create(dev_priv, ring->buffer->obj);
>
> - if (ring->status_page.obj)
> - error->ring[i].hws_page =
> - i915_error_ggtt_object_create(dev_priv, ring->status_page.obj);
> + error->ring[i].hws_page =
> + i915_error_ggtt_object_create(dev_priv, ring->status_page.obj);
>
> i915_gem_record_active_context(ring, error, &error->ring[i]);
>
> --
> 1.9.1
>
> _______________________________________________
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> Intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
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