drm/rockchip: limit gem buffer to 32bit mapping

Change-Id: I64537668aa10a2e26bdd19ac79bc417aa6c4a437
Signed-off-by: Mark Yao <mark.yao@rock-chips.com>

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
index 12bc70d4425795065cb58d18184f7f3cbf88d04a..3a26e9a0f68d8ed72aa164427a475a6af980a1ac 100644 (file)
--- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c
@@ -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;
 }