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path: root/drivers/gpu/drm/mediatek/mtk_drm_gem.c
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Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_drm_gem.c')
-rw-r--r--drivers/gpu/drm/mediatek/mtk_drm_gem.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
index 3eefb22206c7..0d69698f8173 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
@@ -136,7 +136,6 @@ 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);
@@ -168,6 +167,12 @@ 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);
}