drm/exynos: do not release memory region from exporter.

the region should be released by exporter once dmabuf's refcount becomes 0.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index 47696bb..a9bf526 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c
@@ -283,11 +283,21 @@ void exynos_drm_gem_destroy(struct exynos_drm_gem_obj *exynos_gem_obj)
        if (!buf->pages)
                return;
 
+       /*
+        * do not release memory region from exporter.
+        *
+        * the region will be released by exporter
+        * once dmabuf's refcount becomes 0.
+        */
+       if (obj->import_attach)
+               goto out;
+
        if (exynos_gem_obj->flags & EXYNOS_BO_NONCONTIG)
                exynos_drm_gem_put_pages(obj);
        else
                exynos_drm_free_buf(obj->dev, exynos_gem_obj->flags, buf);
 
+out:
        exynos_drm_fini_buf(obj->dev, buf);
        exynos_gem_obj->buffer = NULL;