[PATCH v4 4/9] drm/rockchip/rockchip_drm_gem.c: Convert to use vm_insert_range

From: Souptick Joarder
Date: Mon Dec 17 2018 - 15:19:44 EST


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

Signed-off-by: Souptick Joarder <jrdr.linux@xxxxxxxxx>
Tested-by: Heiko Stuebner <heiko@xxxxxxxxx>
Acked-by: Heiko Stuebner <heiko@xxxxxxxxx>
---
drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 19 ++-----------------
1 file changed, 2 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
index a8db758..8279084 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
@@ -221,26 +221,11 @@ 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 + offset,
+ user_count - offset);
}

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