drm/exynos: free sg object if dma_map_sg is failed

This patch releases sgt's sg object allocated by sgt_alloc_table
correctly.

When exynos_gem_map_dma_buf was called by dma_buf_map_attachmemt(),
the sgt's sg object was allocated by sg_alloc_tale() so
if dma_map_sg() is failed, the sg object should be released.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
index 9df97714b6c0..693d4bca1518 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_dmabuf.c
@@ -110,6 +110,7 @@ static struct sg_table *
         nents = dma_map_sg(attach->dev, sgt->sgl, sgt->orig_nents, dir);
         if (!nents) {
                 DRM_ERROR("failed to map sgl with iommu.\n");
+                sg_free_table(sgt);
                 sgt = ERR_PTR(-EIO);
                 goto err_unlock;
         }