[Xen-devel] [REBASE PATCH v5 4/9] drm/rockchip/rockchip_drm_gem.c: Convert to use vm_map_pages()

[Souptick Joarder <jrdr.linux@xxxxxxxxx>]

Convert to use vm_map_pages() to map range of kernel
memory to user vma.

Tested on Rockchip hardware and display is working,
including talking to Lima via prime.

Signed-off-by: Souptick Joarder <jrdr.linux@xxxxxxxxx>
Tested-by: Heiko Stuebner <heiko@xxxxxxxxx>
---
 drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 17 ++---------------
 1 file changed, 2 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c 
b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
index a8db758..a2ebb08 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
@@ -221,26 +221,13 @@ static int rockchip_drm_gem_object_mmap_iommu(struct 
drm_gem_object *obj,
                                              struct vm_area_struct *vma)
 {
        struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj);
-       unsigned int i, count = obj->size >> PAGE_SHIFT;
+       unsigned int count = obj->size >> PAGE_SHIFT;
        unsigned long user_count = vma_pages(vma);
-       unsigned long uaddr = vma->vm_start;
-       unsigned long offset = vma->vm_pgoff;
-       unsigned long end = user_count + offset;
-       int ret;
 
        if (user_count == 0)
                return -ENXIO;
-       if (end > count)
-               return -ENXIO;
 
-       for (i = offset; i < end; i++) {
-               ret = vm_insert_page(vma, uaddr, rk_obj->pages[i]);
-               if (ret)
-                       return ret;
-               uaddr += PAGE_SIZE;
-       }
-
-       return 0;
+       return vm_map_pages(vma, rk_obj->pages, count);
 }
 
 static int rockchip_drm_gem_object_mmap_dma(struct drm_gem_object *obj,
-- 
1.9.1


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