[PATCH v7 07/36] drm: exynos: use common helper for a scatterlist contiguity check
From: Marek Szyprowski <m.szyprowski@samsung.com>
Date: 2020-06-19 10:38:51
Also in:
dri-devel, linux-iommu, linux-samsung-soc, lkml
Subsystem:
drm drivers, drm drivers for exynos, the rest · Maintainers:
David Airlie, Simona Vetter, Inki Dae, Seung-Woo Kim, Kyungmin Park, Linus Torvalds
Use common helper for checking the contiguity of the imported dma-buf. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> --- drivers/gpu/drm/exynos/exynos_drm_gem.c | 23 +++-------------------- 1 file changed, 3 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_gem.c b/drivers/gpu/drm/exynos/exynos_drm_gem.c
index efa476858db5..1716a023bca0 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_gem.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_gem.c@@ -431,27 +431,10 @@ exynos_drm_gem_prime_import_sg_table(struct drm_device *dev, { struct exynos_drm_gem *exynos_gem; - if (sgt->nents < 1) + /* check if the entries in the sg_table are contiguous */ + if (drm_prime_get_contiguous_size(sgt) < attach->dmabuf->size) { + DRM_ERROR("buffer chunks must be mapped contiguously"); return ERR_PTR(-EINVAL); - - /* - * Check if the provided buffer has been mapped as contiguous - * into DMA address space. - */ - if (sgt->nents > 1) { - dma_addr_t next_addr = sg_dma_address(sgt->sgl); - struct scatterlist *s; - unsigned int i; - - for_each_sg(sgt->sgl, s, sgt->nents, i) { - if (!sg_dma_len(s)) - break; - if (sg_dma_address(s) != next_addr) { - DRM_ERROR("buffer chunks must be mapped contiguously"); - return ERR_PTR(-EINVAL); - } - next_addr = sg_dma_address(s) + sg_dma_len(s); - } } exynos_gem = exynos_drm_gem_init(dev, attach->dmabuf->size);
--
2.17.1
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