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drm/rockchip: limit gem buffer to 32bit mapping

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Change-Id: I64537668aa10a2e26bdd19ac79bc417aa6c4a437
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>
This commit is contained in:
Mark Yao 2017-06-06 14:14:08 +08:00 committed by Huang, Tao
parent 7330eff972
commit 333b831b9e
1 changed files with 5 additions and 0 deletions
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5
drivers/gpu/drm/rockchip/rockchip_drm_gem.c
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@ -24,6 +24,7 @@
#include <linux/dma-buf.h>
#include <linux/reservation.h>
#include <linux/iommu.h>
#include <linux/pagemap.h>
#include "rockchip_drm_drv.h"
#include "rockchip_drm_gem.h"
@ -432,6 +433,7 @@ int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma)
static struct rockchip_gem_object *
rockchip_gem_alloc_object(struct drm_device *drm, unsigned int size)
{
struct address_space *mapping;
struct rockchip_gem_object *rk_obj;
struct drm_gem_object *obj;
@ -445,6 +447,9 @@ rockchip_gem_alloc_object(struct drm_device *drm, unsigned int size)
drm_gem_object_init(drm, obj, size);
mapping = file_inode(obj->filp)->i_mapping;
mapping_set_gfp_mask(mapping, mapping_gfp_mask(mapping) | __GFP_DMA32);
return rk_obj;
}