drm/cma: remove to make sg_table when gem cma is created

The sg_table made when gem cma is created isn't used anywhere. The sgt
of struct drm_gem_cma_object will have only sg_tabel imported.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 0 insertions, 19 deletions

diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
index 6b51bf90df0e..2c07cb9550ef 100644
--- a/drivers/gpu/drm/drm_gem_cma_helper.c
+++ b/drivers/gpu/drm/drm_gem_cma_helper.c
@@ -79,7 +79,6 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
                 unsigned int size)
 {
         struct drm_gem_cma_object *cma_obj;
-        struct sg_table *sgt = NULL;
         int ret;
 
         size = round_up(size, PAGE_SIZE);
@@ -97,23 +96,9 @@ struct drm_gem_cma_object *drm_gem_cma_create(struct drm_device *drm,
                 goto error;
         }
 
-        sgt = kzalloc(sizeof(*cma_obj->sgt), GFP_KERNEL);
-        if (sgt == NULL) {
-                ret = -ENOMEM;
-                goto error;
-        }
-
-        ret = dma_get_sgtable(drm->dev, sgt, cma_obj->vaddr,
-                              cma_obj->paddr, size);
-        if (ret < 0)
-                goto error;
-
-        cma_obj->sgt = sgt;
-
         return cma_obj;
 
 error:
-        kfree(sgt);
         drm_gem_cma_free_object(&cma_obj->base);
         return ERR_PTR(ret);
 }
@@ -175,10 +160,6 @@ void drm_gem_cma_free_object(struct drm_gem_object *gem_obj)
         if (cma_obj->vaddr) {
                 dma_free_writecombine(gem_obj->dev->dev, cma_obj->base.size,
                                       cma_obj->vaddr, cma_obj->paddr);
-                if (cma_obj->sgt) {
-                        sg_free_table(cma_obj->sgt);
-                        kfree(cma_obj->sgt);
-                }
         } else if (gem_obj->import_attach) {
                 drm_prime_gem_destroy(gem_obj, cma_obj->sgt);
         }