drm/exynos: fix missed calling of drm_prime_gem_destroy()

When obj->import_attach is existed, code calling drm_prime_gem_destroy()
was removed from commit 67e93c808b48 ("drm/exynos: stop copying sg
table"), and it's a fault.

The drm_prime_gem_destroy() is cleanup function which GEM drivers need
to call when they use drm_gem_prime_import() to import dma-bufs, so
exynos-drm driver using drm_gem_prime_import() needs calling
drm_prime_gem_destroy().

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index a4fb78e..ce05f13 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -157,11 +157,10 @@ void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj)
         * once dmabuf's refcount becomes 0.
         */
        if (obj->import_attach)
-               goto out;
-
-       exynos_drm_free_buf(exynos_gem_obj);
+               drm_prime_gem_destroy(obj, exynos_gem_obj->sgt);
+       else
+               exynos_drm_free_buf(exynos_gem_obj);
 
-out:
        drm_gem_free_mmap_offset(obj);
 
        /* release file pointer to gem object. */
@@ -589,6 +588,8 @@ exynos_drm_gem_prime_import_sg_table(struct drm_device *dev,
        if (ret < 0)
                goto err_free_large;
 
+       exynos_gem_obj->sgt = sgt;
+
        if (sgt->nents == 1) {
                /* always physically continuous memory if sgt->nents is 1. */
                exynos_gem_obj->flags |= EXYNOS_BO_CONTIG;

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.h b/drivers/gpu/drm/exynos/exynos_drm_gem.h
index cd62f84..97bb48b 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.h
@@ -39,6 +39,7 @@
  *     - this address could be physical address without IOMMU and
  *     device address with IOMMU.
  * @pages: Array of backing pages.
+ * @sgt: Imported sg_table.
  *
  * P.S. this object would be transferred to user as kms_bo.handle so
  *     user can access the buffer through kms_bo.handle.
@@ -52,6 +53,7 @@ struct exynos_drm_gem_obj {
        dma_addr_t              dma_addr;
        struct dma_attrs        dma_attrs;
        struct page             **pages;
+       struct sg_table         *sgt;
 };
 
 struct page **exynos_gem_get_pages(struct drm_gem_object *obj, gfp_t gfpmask);