From: Marek Szyprowski Date: Thu, 30 Apr 2020 12:02:47 +0000 (+0200) Subject: drm: rockchip: use common helper for a scatterlist contiguity check X-Git-Tag: v5.15~2586^2~24^2~11 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6a8f15c62cd9235a3a4eb1c96e79131061310d57;p=platform%2Fkernel%2Flinux-starfive.git drm: rockchip: use common helper for a scatterlist contiguity check Use common helper for checking the contiguity of the imported dma-buf. Signed-off-by: Marek Szyprowski Reviewed-by: Robin Murphy --- diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index b9275ba..2970e53 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 @@ rockchip_gem_dma_map_sg(struct drm_device *drm, 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);