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Thu, 18 Jun 2020 15:40:21 +0000 (GMT) X-AuditID: cbfec7f4-0e5ff7000001ed07-2a-5eeb8ae5b95d Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id A3.E9.07950.5EA8BEE5; Thu, 18 Jun 2020 16:40:21 +0100 (BST) Received: from AMDC2765.digital.local (unknown [106.120.51.73]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20200618154020eusmtip1fd5ad65dd01bfc14781d171dbc566f67~ZrZojwzTQ0709107091eusmtip1s; Thu, 18 Jun 2020 15:40:20 +0000 (GMT) From: Marek Szyprowski To: dri-devel@lists.freedesktop.org, iommu@lists.linux-foundation.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org Subject: [PATCH v6 11/36] drm: mediatek: use common helper for a scatterlist contiguity check Date: Thu, 18 Jun 2020 17:39:32 +0200 Message-Id: <20200618153956.29558-12-m.szyprowski@samsung.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200618153956.29558-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrJKsWRmVeSWpSXmKPExsWy7djPc7pPu17HGRz9p2/Re+4kk8XGGetZ LRb19rJY/N82kdniytf3bBYrVx9lsliw39riy5WHTBabHl9jtbi8aw6bxeXmi4wWa4/cZbdo ajG2uHvvBIvFwQ9PWB34PdbMW8PosffbAhaPnbPusntsWtXJ5rH92wNWj/vdx5k8Ni+p97j9 7zGzx+Qbyxk9dt9sYPPo/2vg0bdlFaPH501yAbxRXDYpqTmZZalF+nYJXBnHev6wFzTxVSyc PJm5gfEKdxcjJ4eEgInEl4U/WLoYuTiEBFYwSpx68Z4NwvnCKLGsfRYrhPOZUeLz7TZGmJZH bacYIRLLGSUOb5jGCpIAazn6ohbEZhMwlOh628UGYosItDJKnOjlAWlgFtjDLLFo1y8WkISw QLzEhDP7wIpYBFQlLs58DjaIV8BO4vzql2wQ2+QlVm84wAxicwLFTx9vBTtJQuAeu8SUX7vY IYpcJA6c+AjVICzx6vgWqLiMxOnJPSwQDc2MEg/PrWWHcHoYJS43zYB6yFrizrlfQN0cQPdp SqzfpQ8RdpS4uv8jK0hYQoBP4sZbQZAwM5A5adt0Zogwr0RHmxBEtZrErOPr4NYevHCJGcL2 kNhxZz80tCYySny9959lAqP8LIRlCxgZVzGKp5YW56anFhvlpZbrFSfmFpfmpesl5+duYgQm sNP/jn/ZwbjrT9IhRgEORiUe3hchr+OEWBPLiitzDzFKcDArifA6nT0dJ8SbklhZlVqUH19U mpNafIhRmoNFSZzXeNHLWCGB9MSS1OzU1ILUIpgsEwenVANj7fc9fj+25pr6yawu2/dVpHLy sac7nL+/dDlSdbdDXFHpTLmNasDHSeoVmnsuJuW9qvlc0nidV7Bk0Yu9P88/3PH8zuGIjQEL upyivoW7i7lk7ZgibTdJ+wrbf+5SqYb9neEz/25abN5Wv3mdzGEFhbrW06XcGhs4vi4J0s+W 4D2x+IWM0dMYJZbijERDLeai4kQA7EnreVwDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrNIsWRmVeSWpSXmKPExsVy+t/xu7pPu17HGVw+IWfRe+4kk8XGGetZ LRb19rJY/N82kdniytf3bBYrVx9lsliw39riy5WHTBabHl9jtbi8aw6bxeXmi4wWa4/cZbdo ajG2uHvvBIvFwQ9PWB34PdbMW8PosffbAhaPnbPusntsWtXJ5rH92wNWj/vdx5k8Ni+p97j9 7zGzx+Qbyxk9dt9sYPPo/2vg0bdlFaPH501yAbxRejZF+aUlqQoZ+cUltkrRhhZGeoaWFnpG JpZ6hsbmsVZGpkr6djYpqTmZZalF+nYJehnHev6wFzTxVSycPJm5gfEKdxcjJ4eEgInEo7ZT jF2MXBxCAksZJY6t/MsOkZCRODmtgRXCFpb4c62LDaLoE6PE+daNjCAJNgFDia63EAkRgU5G iWndH9lBHGaBY8wSGx+/ZwapEhaIldjePQXMZhFQlbg48znYWF4BO4nzq1+yQayQl1i94QBY DSdQ/PTxVrAaIQFbiecf2tgmMPItYGRYxSiSWlqcm55bbKRXnJhbXJqXrpecn7uJERhR2479 3LKDsetd8CFGAQ5GJR7eFyGv44RYE8uKK3MPMUpwMCuJ8DqdPR0nxJuSWFmVWpQfX1Sak1p8 iNEU6KiJzFKiyfnAaM8riTc0NTS3sDQ0NzY3NrNQEuftEDgYIySQnliSmp2aWpBaBNPHxMEp 1cBoaHb4/4PSMi/+VVPO+wXlf1kX867uvBWTbIL49kj1u5qa/sYaG4o+dVeWxkzqFpB+Nu9u YWH35lMbY+9HfhA0v1rIrTvXtTOw8+ITQadVN1cmzdzOdT1HRVusPIHzDl/jtv3rdubWbPkT Ura8rcvpE5PW0k0CX48YX+g5Ol1AK8vxfMusPYFKLMUZiYZazEXFiQAz4CamvgIAAA== X-CMS-MailID: 20200618154021eucas1p181a432ec3a813134f677263ed45f9729 X-Msg-Generator: CA X-RootMTR: 20200618154021eucas1p181a432ec3a813134f677263ed45f9729 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200618154021eucas1p181a432ec3a813134f677263ed45f9729 References: <20200618153956.29558-1-m.szyprowski@samsung.com> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Chun-Kuang Hu , Bartlomiej Zolnierkiewicz , David Airlie , linux-mediatek@lists.infradead.org, Matthias Brugger , Robin Murphy , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, Marek Szyprowski MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Use common helper for checking the contiguity of the imported dma-buf and do this check before allocating resources, so the error path is simpler. Signed-off-by: Marek Szyprowski --- drivers/gpu/drm/mediatek/mtk_drm_gem.c | 28 ++++++-------------------- 1 file changed, 6 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c b/drivers/gpu/drm/mediatek/mtk_drm_gem.c index 6190cc3b7b0d..3654ec732029 100644 --- a/drivers/gpu/drm/mediatek/mtk_drm_gem.c +++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c @@ -212,37 +212,21 @@ struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev, struct dma_buf_attachment *attach, struct sg_table *sg) { struct mtk_drm_gem_obj *mtk_gem; - int ret; - struct scatterlist *s; - unsigned int i; - dma_addr_t expected; - mtk_gem = mtk_drm_gem_init(dev, attach->dmabuf->size); + /* check if the entries in the sg_table are contiguous */ + if (drm_prime_get_contiguous_size(sg) < attach->dmabuf->size) { + DRM_ERROR("sg_table is not contiguous"); + return ERR_PTR(-EINVAL); + } + mtk_gem = mtk_drm_gem_init(dev, attach->dmabuf->size); if (IS_ERR(mtk_gem)) return ERR_CAST(mtk_gem); - expected = sg_dma_address(sg->sgl); - for_each_sg(sg->sgl, s, sg->nents, i) { - if (!sg_dma_len(s)) - break; - - if (sg_dma_address(s) != expected) { - DRM_ERROR("sg_table is not contiguous"); - ret = -EINVAL; - goto err_gem_free; - } - expected = sg_dma_address(s) + sg_dma_len(s); - } - mtk_gem->dma_addr = sg_dma_address(sg->sgl); mtk_gem->sg = sg; return &mtk_gem->base; - -err_gem_free: - kfree(mtk_gem); - return ERR_PTR(ret); } void *mtk_drm_gem_prime_vmap(struct drm_gem_object *obj)