Use common helper for checking the contiguity of the imported dma-buf.
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- For more information, see '[PATCH v5 00/38] DRM: fix struct sg_table nents vs. orig_nents misuse' thread: https://lore.kernel.org/linux-iommu/20200513132114.6046-1-m.szyprowski@samsu... --- drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 19 +------------------ 1 file changed, 1 insertion(+), 18 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index 0d18846..21f8cb2 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c @@ -460,23 +460,6 @@ struct sg_table *rockchip_gem_prime_get_sg_table(struct drm_gem_object *obj) return sgt; }
-static unsigned long rockchip_sg_get_contiguous_size(struct sg_table *sgt, - int count) -{ - struct scatterlist *s; - dma_addr_t expected = sg_dma_address(sgt->sgl); - unsigned int i; - unsigned long size = 0; - - for_each_sg(sgt->sgl, s, count, i) { - if (sg_dma_address(s) != expected) - break; - expected = sg_dma_address(s) + sg_dma_len(s); - size += sg_dma_len(s); - } - return size; -} - static int rockchip_gem_iommu_map_sg(struct drm_device *drm, struct dma_buf_attachment *attach, @@ -498,7 +481,7 @@ static unsigned long rockchip_sg_get_contiguous_size(struct sg_table *sgt, if (!count) return -EINVAL;
- if (rockchip_sg_get_contiguous_size(sg, count) < attach->dmabuf->size) { + if (drm_prime_get_contiguous_size(sg) < attach->dmabuf->size) { DRM_ERROR("failed to map sg_table to contiguous linear address.\n"); dma_unmap_sg(drm->dev, sg->sgl, sg->nents, DMA_BIDIRECTIONAL);