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drm/mediatek: respect page offset for PRIME mmap calls

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Respect page offset for PRIME mmap calls

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
This commit is contained in:
Yongqiang Niu
2019-03-27 14:19:20 +08:00
committed by CK Hu
parent 937f861def
commit 46a3b9fce2
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/mediatek/mtk_drm_gem.c
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@@ -144,7 +144,6 @@ static int mtk_drm_gem_object_mmap(struct drm_gem_object *obj,
* VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
*/
vma->vm_flags &= ~VM_PFNMAP;
vma->vm_pgoff = 0;
ret = dma_mmap_attrs(priv->dma_dev, vma, mtk_gem->cookie,
mtk_gem->dma_addr, obj->size, mtk_gem->dma_attrs);
@@ -176,6 +175,12 @@ int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
obj = vma->vm_private_data;
/*
* Set vm_pgoff (used as a fake buffer offset by DRM) to 0 and map the
* whole buffer from the start.
*/
vma->vm_pgoff = 0;
return mtk_drm_gem_object_mmap(obj, vma);
}