drm: omapdrm: use common helper for extracting pages array

Use common helper for converting a sg_table object into struct
page pointer array.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>

diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c
index d0d12d5..f67f223 100644 (file)
--- a/drivers/gpu/drm/omapdrm/omap_gem.c
+++ b/drivers/gpu/drm/omapdrm/omap_gem.c
@@ -1297,10 +1297,9 @@ struct drm_gem_object *omap_gem_new_dmabuf(struct drm_device *dev, size_t size,
                omap_obj->dma_addr = sg_dma_address(sgt->sgl);
        } else {
                /* Create pages list from sgt */
-               struct sg_page_iter iter;
                struct page **pages;
                unsigned int npages;
-               unsigned int i = 0;
+               unsigned int ret;
 
                npages = DIV_ROUND_UP(size, PAGE_SIZE);
                pages = kcalloc(npages, sizeof(*pages), GFP_KERNEL);
@@ -1311,14 +1310,9 @@ struct drm_gem_object *omap_gem_new_dmabuf(struct drm_device *dev, size_t size,
                }
 
                omap_obj->pages = pages;
-
-               for_each_sg_page(sgt->sgl, &iter, sgt->orig_nents, 0) {
-                       pages[i++] = sg_page_iter_page(&iter);
-                       if (i > npages)
-                               break;
-               }
-
-               if (WARN_ON(i != npages)) {
+               ret = drm_prime_sg_to_page_addr_arrays(sgt, pages, NULL,
+                                                      npages);
+               if (ret) {
                        omap_gem_free_object(obj);
                        obj = ERR_PTR(-ENOMEM);
                        goto done;