Set vm_pgoff to 0 after using it to look up the GEM node, before passing it on rockchip_gem_mmap_buf() where the offset must be from the start of the buffer. Passing in the fake offset currently works because the dma_mmap_attrs implementation that is used for this device, arm_iommu_mmap_attrs, ignores the offset completely. Signed-off-by: Ørjan Eide <orjan.eide@xxxxxxx> --- drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index 7ca8799e..69f01c3 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c @@ -94,6 +94,11 @@ int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma) return -EACCES; } + /* 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; + obj = container_of(node, struct drm_gem_object, vma_node); ret = rockchip_gem_mmap_buf(obj, vma); -- 1.9.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
