drm: use common drm_gem_dmabuf_release in i915/exynos drivers

Note that this is slightly tricky since both drivers store their
native objects in dma_buf->priv. But both also embed the base
drm_gem_object at the first position, so the implicit cast is ok.

To use the release helper we need to export it, too.

Cc: Inki Dae <inki.dae@samsung.com>
Cc: Intel Graphics Development <intel-gfx@lists.freedesktop.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 1 insertions, 22 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
index a0f997e0cbdf..3cd56e16a0ef 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
@@ -127,27 +127,6 @@ static void exynos_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
         /* Nothing to do. */
 }
 
-static void exynos_dmabuf_release(struct dma_buf *dmabuf)
-{
-        struct exynos_drm_gem_obj *exynos_gem_obj = dmabuf->priv;
-
-        /*
-         * exynos_dmabuf_release() call means that file object's
-         * f_count is 0 and it calls drm_gem_object_handle_unreference()
-         * to drop the references that these values had been increased
-         * at drm_prime_handle_to_fd()
-         */
-        if (exynos_gem_obj->base.export_dma_buf == dmabuf) {
-                exynos_gem_obj->base.export_dma_buf = NULL;
-
-                /*
-                 * drop this gem object refcount to release allocated buffer
-                 * and resources.
-                 */
-                drm_gem_object_unreference_unlocked(&exynos_gem_obj->base);
-        }
-}
-
 static void *exynos_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf,
                                                 unsigned long page_num)
 {
@@ -193,7 +172,7 @@ static struct dma_buf_ops exynos_dmabuf_ops = {
         .kunmap                 = exynos_gem_dmabuf_kunmap,
         .kunmap_atomic          = exynos_gem_dmabuf_kunmap_atomic,
         .mmap                   = exynos_gem_dmabuf_mmap,
-        .release                = exynos_dmabuf_release,
+        .release                = drm_gem_dmabuf_release,
 };
 
 struct dma_buf *exynos_dmabuf_prime_export(struct drm_device *drm_dev,