[PATCH v2 4/9] drm/rockchip/rockchip_drm_gem.c: Convert to use vm_insert_range

Souptick Joarder
2018-12-02T06:19:13Z

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

Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Tested-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Heiko Stuebner <heiko@sntech.de>
---
drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 20 ++------------------
1 file changed, 2 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
index a8db758..2cb83bb 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
@@ -221,26 +221,10 @@ 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 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_insert_range(vma, vma->vm_start, rk_obj->pages,
+ user_count);
}

static int rockchip_drm_gem_object_mmap_dma(struct drm_gem_object *obj,
--
1.9.1